CN103147434B - Treatment system and method for consolidating soft soil foundation by utilizing industrial waste gas heat - Google Patents

Abstract

The invention provides a treatment system and method for using industrial waste gas heat to strengthen soft ground. The treatment system includes an industrial waste gas thermal separation device, a waste gas purification device, a tail gas collection and treatment device, a foundation soil stirring device, and a gas pumping device. The treatment system uses the waste gas heat after dust removal, desulfurization and denitrification, extracts pure carbon dioxide through the separation device and purification device, mixes the curing agent into the foundation soil with the stirring device, and pumps the pure carbon dioxide into the mixed soil with the gas pumping device. Carbonation strengthens soft ground. The exhaust gas purification device includes an absorption chamber and a decomposition chamber, both of which are closed devices with valves. The purification solution in the device is alkali solution or carbonate solution, or a mixture thereof, which can be recycled. The method and treatment system make full use of industrial waste gas heat, solve the problem of resource utilization of industrial waste gas heat, and simultaneously improve the construction efficiency of foundation reinforcement and the strength of foundation soil.

Description

A treatment system and method for using industrial waste gas heat to strengthen soft ground

technical field

The invention relates to a treatment system and method for strengthening soft soil foundations, in particular to a treatment system and method for strengthening soft soil foundations by using industrial waste gas heat, and belongs to the technical field of environmental geotechnical engineering.

Background technique

In 2007, the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) pointed out: "Global climate warming since the middle of the 20th century is due to the increase in man-made greenhouse gas emissions, especially carbon dioxide." At present, the global carbon dioxide emissions caused by human activities are about 24 billion tons per year, and the cumulative carbon dioxide concentration is 379ppm, which is 33% higher than that before industrialization, and will increase at a rate of more than 1ppm every year, causing many major disasters to the world. According to literature statistics, carbon dioxide emissions will increase to 38.8 billion tons by 2025, and the number of environmental refugees in the world has reached 25 million. It is estimated that by 2050, the number of environmental refugees caused by global warming will reach 150 million. China is also deeply affected The dangers of climate warming. According to the 2008 white paper "China's Policies and Actions to Address Climate Change", the trend of climate warming in China is basically consistent with the general trend of the world. Over the past 100 years (1908-2007), the average surface temperature in China has increased by 1.1°C. In the past 30 years, the sea surface temperature along China's coast has risen by 0.9°C, and the coastal sea level has risen by 9cm. The prediction results of Chinese scientists show that the average annual temperature in China will rise by 1.3°C to 2.1°C in 2020, and by 2.3°C to 3.3°C in 2050. This will lead to an increase in the frequency of extreme weather and climate events, more pronounced uneven distribution of precipitation, an increase in the frequency of heavy precipitation events, continued expansion of droughts, and further intensification of sea level rise. Therefore, carbon dioxide emission reduction has become a bottleneck restricting the development of economic society and ecological environment.

The carbon dioxide emitted by cement production includes: carbon dioxide directly produced by calcined clinker and fuel and indirectly produced by calcined limestone; theoretically, every ton of cement clinker produced produces 0.511 tons of carbon dioxide, and coal combustion produces 0.383-0.704 tons of carbon dioxide. Adding the carbon dioxide produced by the decomposition of calcium carbonate during clinker production, 0.894-1.215 tons of carbon dioxide is emitted for every ton of cement clinker produced. Generally speaking, about 1 ton of carbon dioxide is emitted for every ton of cement clinker produced. At present, the annual output of Portland cement in the world exceeds 2.5 billion tons, and it is expected to double by 2050. The carbon dioxide produced by cement production is equivalent to 5-10% of all global man-made emissions. According to statistics, my country's cement production in 2008 More than 700 million tons, the total carbon dioxide emissions in the cement production process account for about 18% to 22% of the country's total carbon dioxide emissions.

As a responsible developing country and a signatory to the Kyoto Agreement, China bears a heavy responsibility for reducing carbon dioxide emissions. The reduction, capture and storage of carbon dioxide has attracted the attention of the government and the scientific research community, and is a focus of current environmental engineering research. question. However, the carbon dioxide capture and storage technology is still in the exploration and initial stage, its safety needs to be further tested, and the cost is relatively high. However, cement production in engineering construction is one of the important sources of carbon dioxide. Scientists at home and abroad have already begun to study substitutes for Portland cement, such as Sorel cement invented by Sorel in France in 1867, also known as magnesium cement or oxychloride. Magnesium cement; Australian scientist John Harrison invented three "green cements" in 2001 and 2004 using activated magnesia: Tec-cements, Eco-cements and Enviro-cements. At the same time, Harrison emphasized that the new magnesium-containing cement has some advantages over Portland cement. For example, activated magnesium oxide can be produced at a temperature 600-750°C lower than Portland cement, while the calcination temperature for cement production is as high as 1450°C; One ton of magnesium oxide requires 2.08 tons of magnesium carbonate, which produces about 1.4 tons of carbon dioxide emissions. The production of one ton of quicklime requires 1.8 tons of limestone and emits about 0.79 tons of carbon dioxide. In addition, quicklime is the main soil curing agent in the early stage. The water in the water quickly undergoes hydration reaction and generates calcium hydroxide. This reaction will reduce the water content in the soil and improve the properties of the soil. Calcium hydroxide will form calcium silicate through gelation. If carbon dioxide is introduced, it can also be partly Limestone is formed, which increases the strength of the solidified soil. Activated magnesium oxide can quickly react with water at room temperature to form magnesium hydroxide, which can be carbonized within a few hours under the action of carbon dioxide, which can improve the strength of solidified soil, and its strength is not lower than that of cement soil after testing The strength, while absorbing carbon dioxide, has a significant environmental effect.

my country is in a period of rapid development of engineering construction, there are still a large number of foundation reinforcement projects, and there are many technologies and methods for foundation reinforcement in my country, but the current processing devices still have a lot of problems in terms of meeting low-carbon environmental protection and construction efficiency. big gap.

Therefore, combining the above environmental problems and the current status quo of our country, develop and develop a treatment system and method with independent intellectual property rights for the use of industrial waste gas heat reinforcement of soft soil foundation, which will reduce carbon dioxide emissions, improve the ecological environment and improve the efficiency of foundation reinforcement in my country. etc. are of great significance.

Contents of the invention

In view of the above-mentioned environmental problems and the availability of industrial waste heat, the purpose of the present invention is to provide a low-carbon, environmentally friendly treatment system and method for strengthening soft soil foundations by using industrial waste heat. At the same time, the invention can also improve the reinforcement of the foundation. efficiency.

Its technical solutions are:

A treatment system for using industrial waste gas heat to strengthen soft ground, characterized in that it includes a waste gas thermal separation device 5, a waste gas purification device, a tail gas collection and treatment device 15, a foundation soil stirring device, and a gas pumping device. The air inlet of the device 5 is sealed and connected to the rear end of the anti-corrosion heat preservation pipe 4, the front end of the anti-corrosion heat preservation pipe 4 is sealed and connected to the top of the exhaust port of the chimney 1 through the flange plate 2, and the anti-corrosion heat preservation pipe 4 is provided with an exhaust valve A3 , the waste gas purification device includes an absorption chamber 8 and a decomposition chamber 10, the bottom of the absorption chamber 8 is connected with the waste gas heat separation device 5 through an anti-corrosion air guide pipe 6, and one end of the anti-corrosion air guide pipe 6 is connected with the waste gas heat separation device 5, and the anti-corrosion air guide pipe The other end of 6 stretches into the inner bottom of absorption chamber 8, and the bottom of absorption chamber 8 communicates with the bottom of decomposition chamber 10 through condensation pipe 19, and condenser 18 is housed on the condensation pipe 19, and the condensation between absorption chamber 8 and condenser 18 There is a control valve B17 on the pipe, the decomposition chamber 10 is placed in the heating box 9, the waste gas thermal separation device 5 is connected to the heating box 9 through the anti-corrosion heat transfer tube 7, and one end of the anti-corrosion heat transfer tube 7 is connected to the exhaust gas thermal separation device 5, and the anti-corrosion heat transfer tube The other end of 7 extends into the heating box 9, and the tail gas collection and treatment device 15 is connected to the top of the absorption chamber 8 through an anti-corrosion air guide tube 14. The anti-corrosion air guide tube 14 is provided with a control valve A13, and the decomposition chamber 10 is provided with a temperature sensor 40. The top of the absorption chamber 8 is provided with a step-down exhaust pipe 11, and the step-down exhaust pipe 11 is provided with an exhaust valve B12. Storage container 31 and curing agent delivery pipe 30, stirring shaft 32 is vertically attached on the pile frame 29, and stirring shaft 32 is connected with curing agent storage container 31 by curing agent delivery pipe 30, and described a plurality of stirring blades 33 are fixed on stirring On the shaft 32, the gas pumping device includes a pressure reducing valve 20, a cooling air pump 21, a gas flow meter 22, an air guide pipe 23, a control valve C24, a high-pressure gas cylinder 25, a pressure pump 26, a high-pressure pipe 36 and a pressure control valve 37. The top of the decomposition chamber 10 and the top of the high-pressure gas cylinder 25 are sealed and connected through the air guide tube 23. In the direction from the decomposition chamber 10 to the high-pressure gas cylinder 25, the air guide tube 23 is sequentially provided with a pressure reducing valve 20, a cooling air pump 21, a gas Flowmeter 22 and control valve C24, wherein the pressure reducing valve 20 is placed between the top of the decomposition chamber 10 and the cooling air pump 21, adjacent to the top of the decomposition chamber 10 and the cooling air pump 21, and the cooling air pump 21 is placed on the pressure reducing valve 20 Between the gas flow meter 22 and adjacent to the pressure reducing valve 20 and the gas flow meter 22, the control valve C24 is placed between the gas flow meter 22 and the top of the high-pressure gas cylinder 25, and connected to the top of the gas flow meter 22 and the high-pressure gas cylinder 25 Adjacent, the pressure pump 26 is placed on the top of the high-pressure gas cylinder 25, and a plurality of introduction pipes 27 are inserted into the foundation soil 28. The top end communicates, and the other end is connected with the branch pipe 38 through the pressure control valve 37 .

Further, the absorption chamber 8, the decomposition chamber 10 and the heating box 9 are all sealed containers, the absorption chamber 8 contains the reaction solution 16, and the height of the bottom of the decomposition chamber 10 is not lower than the upper plane of the reaction solution 16 in the absorption chamber 8, and the absorption chamber 8 is made of anti-corrosion material, and the decomposition chamber 10 is made of anti-corrosion and heat-conducting material.

Further, the plurality of stirring blades 33 are connected to the lower end of the stirring shaft 32 by bolts or welding, the stirring shaft 32 is hollow, and the plurality of stirring blades 33 are symmetrically arranged and may be 2 or 3 layers, A curing agent spout 34 is provided on the stirring shaft 32 between the two layers of stirring blades 33 at the lower end of the stirring shaft.

Further, the introduction pipe 27 is provided with double rows of ventilation holes 39 , the introduction pipe 27 is connected to the branch pipe 38 , and the surface of the foundation soil 28 above the branch pipe 38 is covered with a sealing film 35 .

A method for thermally reinforcing soft soil foundations by using industrial waste gas, characterized in that the following steps are adopted:

a. Use the anti-corrosion insulation pipe 4 to input the heat of industrial waste gas after dust removal, desulfurization and denitrification into the waste gas heat separation device 5, and the separated waste gas is passed into the absorption chamber 8 through the anti-corrosion air guide tube 6, and the separated heat is conducted through the anti-corrosion heat conduction The tube 7 leads into the heating box 9,

b. Add the reaction liquid 16 in the absorption chamber 8, close the exhaust valve B12, open the control valve A13, after the exhaust gas after separation fully reacts with the reaction liquid 16, close the control valve A13 and the pressure reducing valve 20, open the control valve B17 and Control valve C24, the exhaust gas presses the reacted solution in the absorption chamber 8 into the decomposition chamber 10 through the condensation pipe 19, after the solution completely enters the decomposition chamber 10, close the control valve B17, open the control valve A13,

c. The solution in the decomposition chamber 10 decomposes under pyrolysis, generates carbon dioxide gas and water vapor, closes the pressure control valve 37, cools the air pump 21 and removes the water vapor in the generated gas, and passes the carbon dioxide gas through the air guide tube 23 High-pressure cylinder 25,

d. when the current flow measured by the gas flow meter 22 is lower than 10% of the normal flow, close the control valve C24, open the control valve B17, the control valve A13 and the pressure reducing valve 20, and the solution in the decomposition chamber 10 is condensed under the action of gravity Pipe 19 and condenser 18 flow into the absorption chamber 8, then close the control valve B17,

e. Repeat steps a-d to continuously generate gas,

f. according to the lifting speed and the rotation speed of the radius of stirring blade 33 and stirring shaft 32, setting curing agent delivery rate, by curing agent delivery pipe 30, stirring shaft 32 and curing agent spout 34 in foundation soil stirring device, curing agent is transferred from The curing agent storage container 31 is sprayed into the foundation soil 28, and the curing agent and the foundation soil 28 are uniformly stirred by the stirring blade 33,

g. Open the pressure control valve 37 and the pressure pump 26, and introduce the gas in the high-pressure cylinder 25 into the foundation soil 28 through the high-pressure pipe 36, the branch pipe 38, the introduction pipe 27 and the ventilation hole 39.

Further, the separated exhaust gas includes carbon dioxide gas, and the reaction solution 16 is an alkali solution or a saturated carbonate solution.

Further, the curing agent is active magnesium oxide powder, quicklime powder or a mixture of both.

Further, the reaction solution 16 is sodium hydroxide solution, potassium hydroxide solution, sodium carbonate solution, potassium carbonate solution or a mixture of the above solutions, and the reaction solution 16 generates bicarbonate solution after reacting in the absorption chamber 8, and is absorbed The separated waste gas is fed into the decomposition chamber 10 .

Further, the ambient temperature of the decomposition chamber 10 shown by the temperature sensor 40 in the decomposition chamber 10 is not lower than the minimum temperature of the decomposition of the bicarbonate thermal solution that is pressed into the decomposition chamber (10) after the reaction solution 16 reacts .

The beneficial effects of the present invention are:

Due to the adoption of the above technical scheme, a treatment system and method for thermally strengthening soft soil foundations using industrial waste gas of the present invention, the carbon dioxide used is the treated and purified waste gas from power plants, chemical plants or cement plants, etc., which reduces environmental pollution. The emission of carbon dioxide, due to the use of sodium, potassium alkali solution or sodium, potassium carbonate solution or their mixture in the purification of waste gas, also fully utilizes the waste heat discharged from the industry in the decomposition process, and also realizes The recycling of sodium and potassium alkali solution or sodium and potassium carbonate solution or their mixed solution saves the cost of exhaust gas purification and ensures the full utilization of waste heat; ground reinforcement uses activated magnesia powder, quicklime powder or both The mixture, compared with ordinary Portland cement, produces the same quality of activated magnesia and quicklime, which emits relatively less carbon dioxide, and also has a significant low-carbon environmental protection effect on raw materials; the carbon dioxide is passed into the foundation soil, and the foundation soil The upper surface of the upper surface is covered with a sealing film, which also reduces the leakage of carbon dioxide during the construction reinforcement process, so it also has obvious environmental effects during the construction stage; Injecting a certain pressure of carbon dioxide accelerates the carbonization and solidification of the foundation soil, realizes the rapid growth of the strength of the foundation soil, and has a high construction reinforcement efficiency.

Description of drawings

The treatment system and method for thermally strengthening soft ground by using industrial waste gas according to the present invention will be described in detail below in conjunction with accompanying drawing 1 .

Accompanying drawing 1 is a kind of schematic diagram of the treatment system of the present invention that utilizes industrial waste gas heat to strengthen soft ground.

Among them: 1-chimney, 2-flange, 3-exhaust valve A, 4-corrosion insulation pipe, 5-exhaust gas thermal separation device, 6-corrosion air guide tube, 7-corrosion heat conduction tube, 8-absorption chamber, 9 -Heating box, 10-Decomposition chamber, 11-Decompression exhaust pipe, 12-Exhaust valve B, 13-Control valve A, 14-Anti-corrosion air duct, 15-Tail gas collection and treatment device, 16-Reaction liquid, 17- Control valve B, 18-condenser, 19-condenser pipe, 20-pressure reducing valve, 21-cooling pump, 22-gas flow meter, 23-air guide pipe, 24-control valve C, 25-high pressure cylinder, 26 -pressure pump, 27-introduction pipe, 28-foundation soil, 29-pile frame, 30-curing agent delivery pipe, 31-curing agent storage container, 32-stirring shaft, 33-stirring blade, 34-curing agent spout, 35-sealing film, 36-high pressure pipe, 37-pressure control valve, 38-branch pipe, 39-air vent, 40-temperature sensor.

Detailed ways

A treatment system and method for using industrial waste gas heat to strengthen soft ground. The treatment system is mainly composed of an industrial waste gas heat separation device 5, a waste gas purification device, a tail gas collection and treatment device 15, a foundation soil stirring device, and a gas pumping device. The exhaust gas directly produced in the waste gas is carbon dioxide, nitrogen oxide, sulfur oxide, nitrogen, ammonia, carbon monoxide, etc., and the high-temperature gas that enters the waste gas thermal separation device 5 is dust removal, desulfurization, and denitrification gas, mainly carbon monoxide and carbon dioxide. , nitrogen, etc. The exhaust gas thermal separation device 5 is a device that absorbs heat, but does not absorb gas. The temperature of the gas passing through the exhaust gas thermal separation device 5 will decrease due to most of the heat being absorbed. One of its technical principles: similar to radiators and solar heat absorbing panels, however, conventional radiators use water as the heat medium (the highest temperature can reach 98°C) or steam as the heat medium (the highest temperature up to 160° C.), heat transfer oil can be used as the heat medium in the waste gas thermal separation device 5 (the maximum temperature can reach 400° C.). The second technical principle: using the alloyed semiconductor nanocrystal technology developed by Martin Maldovan of the Massachusetts Institute of Technology (MIT), "thermal phonons (heatphonons) crystals" can control the passage of heat , to gather heat energy (usually used for thermal power generation), with the help of this technology, the waste gas heat separation device 5 can also greatly absorb the heat in the heat of industrial waste gas. Since there are relatively many studies on this technology in the field of energy, it is only briefly described here. The air inlet of the waste gas thermal separation device 5 is sealed and connected with the rear end of the anti-corrosion heat preservation pipe 4, the front end of the anti-corrosion heat preservation pipe 4 is sealed and connected with the top of the exhaust port of the chimney 1 through the flange 2, and the anti-corrosion heat preservation pipe 4 is provided with an exhaust valve A3, the waste gas purification device is made up of absorption chamber 8 and decomposition chamber 10, holds reaction liquid 16 in the absorption chamber 8, and reaction liquid 16 is mainly the alkali solution of sodium, potassium or the carbonate solution of sodium, potassium or this alkali solution and The mixed solution of carbonate solution reacts with carbon dioxide to generate sodium or potassium bicarbonate solution. In the decomposition chamber 10, it is the corresponding bicarbonate solution after the reaction in the absorption chamber 8. After the reaction in the absorption chamber 8, the gas pressure Press down into the decomposition chamber 10, and the solution in the decomposition chamber 10 enters the absorption chamber 8 under the action of its own weight after being pyrolyzed. In the device setting, ensure that the height of the bottom of the decomposition chamber 10 is higher than the upper liquid level in the absorption chamber 8 .

The bottom of the absorption chamber 8 is connected to the waste gas heat separation device 5 through the anti-corrosion air guide pipe 6, one end of the anti-corrosion air guide pipe 6 is connected to the waste gas heat separation device 5, and the other end of the anti-corrosion air guide pipe 6 extends into the bottom of the absorption chamber 8, and the absorption chamber The bottom of 8 communicates with the bottom of decomposition chamber 10 through condensation pipe 19. Condenser 18 is installed on condensation pipe 19. Control valve B17 is provided on the condensation pipe between absorption chamber 8 and condenser 18. Decomposition chamber 10 is placed in heating box. 9, the waste gas thermal separation device 5 is connected to the heating box 9 through the anti-corrosion heat-conducting tube 7, one end of the anti-corrosion heat-conducting tube 7 is connected to the exhaust gas thermal separation device 5, and the other end of the anti-corrosion heat-conducting tube 7 extends into the heating box 9, and the tail gas is collected and processed The device 15 is connected to the top of the absorption chamber 8 through an anti-corrosion air guide pipe 14, the anti-corrosion air guide pipe 14 is provided with a control valve A13, the decomposition chamber 10 is provided with a temperature sensor 40, and the top of the absorption chamber 8 is provided with a pressure-reducing exhaust pipe 11 to reduce the pressure. Pressure exhaust pipe 11 is provided with exhaust valve B12, and described stirring device comprises pile frame 29, stirring shaft 32, a plurality of stirring blades 33, curing agent storage container 31 and curing agent delivery pipe 30, and stirring shaft 32 is vertical Attached to the pile frame 29, the stirring shaft 32 is connected with the curing agent storage container 31 through the curing agent delivery pipe 30, the plurality of stirring blades 33 are fixed on the stirring shaft 32, and the gas pumping device includes a pressure reducing valve 20 , cooling air pump 21, gas flow meter 22, air guide pipe 23, control valve C24, high-pressure gas cylinder 25, pressure pump 26, high-pressure pipe 36 and pressure control valve 37, decomposition chamber 10 top and high-pressure gas cylinder 25 top pass through air guide pipe 23 sealed connection, from the decomposition chamber 10 to the direction of the high-pressure gas cylinder 25, the air guide pipe 23 is provided with a pressure reducing valve 20, a cooling air pump 21, a gas flow meter 22 and a control valve C24 in sequence, wherein the pressure reducing valve 20 is placed Between the top of the decomposition chamber 10 and the cooling air pump 21, adjacent to the top of the decomposition chamber 10 and the cooling air pump 21, the cooling air pump 21 is placed between the decompression valve 20 and the gas flow meter 22, and is connected to the decompression valve 20 and the gas flow meter. The flowmeter 22 is adjacent, the control valve C24 is placed between the gas flowmeter 22 and the top of the high-pressure gas cylinder 25, adjacent to the top of the gas flowmeter 22 and the high-pressure gas cylinder 25, and the pressure pump 26 is placed at the top of the high-pressure gas cylinder 25, and more One introduction pipe 27 is inserted in the foundation soil 28, and described a plurality of introduction pipes 27 are respectively connected with branch pipe 38, and one end of high-pressure pipe 36 communicates with the inner top of high-pressure cylinder 25, and the other end is connected with branch pipe 38 through pressure control valve 37.

The absorption chamber 8, the decomposition chamber 10 and the heating box 9 are all sealed containers. The reaction solution 16 is contained in the absorption chamber 8. The height of the bottom of the decomposition chamber 10 is not lower than the upper plane of the reaction solution 16 in the absorption chamber 8. The absorption chamber 8 adopts anti-corrosion Made of materials, the decomposition chamber 10 is made of anti-corrosion and heat-conducting materials.

The stirring blades 33 are connected to the lower end of the stirring shaft 32 by bolts or welding, the stirring shaft 32 is hollow, and the plurality of stirring blades 33 are arranged symmetrically, which can be 2 or 3 layers. A curing agent spout 34 is provided on the stirring shaft 32 between the stirring blades 33 of the layers. The introduction pipe 27 is provided with double rows of ventilation holes 39 , the introduction pipe 27 is connected with the branch pipe 38 , and the surface of the foundation soil 28 above the branch pipe 38 is covered with a sealing film 35 .

The specific implementation method of using industrial waste gas heat to strengthen the soft soil foundation:

Although what adopt in following each embodiment is sodium bicarbonate solution or potassium bicarbonate solution, also can use other bicarbonate solutions, this corresponding bicarbonate is that carbonic acid reaction solution 16 reacts and obtains after being pressed into decomposition chamber 10 in solution. The temperature sensor 40 is in the decomposition chamber 10, so the temperature displayed by the temperature sensor 40 is the ambient temperature in the decomposition chamber 10, and bicarbonate can be decomposed at this temperature.

Example 1

a. Use the anti-corrosion insulation pipe 4 to transfer the industrial waste gas heat after dust removal into the industrial waste gas thermal separation device 5, and the separated waste gas passes into the absorption chamber 8 through the anti-corrosion air guide pipe 6, and the separated heat is introduced through the anti-corrosion heat conduction pipe 7 heating box 9,

b. the reaction solution 16 added in the absorption chamber 8 is sodium hydroxide solution, close the exhaust valve B12, open the control valve A13, after excessive carbon dioxide gas and solution fully react to generate saturated sodium bicarbonate solution, close the control valve A13 and reduce Pressure valve 20, open control valve B17 and control valve C24, the exhaust gas will press the saturated sodium bicarbonate solution in the absorption chamber 8 into the decomposition chamber 10 through the condensation pipe 19, after the solution completely enters the decomposition chamber 10, close the control valve B17, open the control valve valve A13,

C. the saturated sodium bicarbonate solution in the decomposition chamber 10 decomposes carbon dioxide gas under the effect of heat, wherein the temperature in the decomposition chamber 10 is not lower than the minimum temperature of the corresponding sodium bicarbonate solution decomposition, then close the pressure control valve 37, cooling Aspirator 21 passes carbon dioxide gas in the high-pressure gas cylinder 25 through the air guide tube 23, wherein the corresponding sodium bicarbonate solution is obtained after the reaction of the reaction solution 16, and is compressed into the decomposition chamber 10 by the waste gas. Temperature sensor 40 is in the decomposition chamber 10, so the displayed temperature of temperature sensor 40 is the ambient temperature in the decomposition chamber 10, and sodium bicarbonate can be decomposed at this temperature,

d. When the gas flow meter 22 is lower than 10% of the normal flow rate, close the control valve C24, open the control valve B17, the control valve A13 and the pressure reducing valve 20, and the solution in the decomposition chamber 10 passes through the condensation pipe 19 and condenses under the action of gravity. The device 18 flows into the absorption chamber 8, and then closes the control valve B17,

e. Repeat steps a-d to continuously generate carbon dioxide gas.

f. According to the radius of the stirring blade 33 and the lifting speed of the stirring shaft 32, the active magnesium oxide powder delivery rate is set, and the active oxidation is activated by the curing agent delivery pipe 30, the hollow stirring shaft 32 and the curing agent spout 34 in the foundation soil stirring device. The magnesium powder is distributed on the foundation soil 28 from the curing agent storage container 31, and the active magnesium oxide powder and the foundation soil 28 are evenly stirred by the stirring blade 33,

g. the introduction pipe 27 is vertically inserted into the foundation soil 28, and connected to the branch pipe 38, the pressure control valve 37 and the pressure pump 26 are opened, and the carbon dioxide in the high-pressure cylinder 25 is passed through the high-pressure pipe 36, the branch pipe 38, the introduction pipe 27 and the The ventilation hole 39 is introduced into the foundation soil 28, and the carbonization reaction of the foundation soil 28 needs to be carried out under the sealing film 35 to generate magnesium carbonate.

Example 2

a. Use the anti-corrosion insulation pipe 4 to transfer the industrial waste gas heat after dust removal into the industrial waste gas thermal separation device 5, and the separated waste gas passes into the absorption chamber 8 through the anti-corrosion air guide pipe 6, and the separated heat is introduced through the anti-corrosion heat conduction pipe 7 heating box 9,

b. the reaction solution 16 added in the absorption chamber 8 is a sodium carbonate solution, close the exhaust valve B12, open the control valve A13, after the excess carbon dioxide gas and the solution fully react to generate saturated sodium bicarbonate solution, close the control valve A13 and reduce pressure Valve 20, open the control valve B17 and control valve C24, the exhaust gas will press the saturated sodium bicarbonate solution in the absorption chamber 8 into the decomposition chamber 10 through the condensation pipe 19, after the solution completely enters the decomposition chamber 10, close the control valve B17, open the control valve A13,

C. the saturated sodium bicarbonate solution in the decomposition chamber 10 decomposes carbon dioxide gas under the effect of heat, wherein the temperature in the decomposition chamber 10 is not lower than the minimum temperature of the corresponding sodium bicarbonate solution decomposition, then close the pressure control valve 37, cooling Aspirator 21 passes carbon dioxide gas in the high-pressure gas cylinder 25 through the air guide tube 23, wherein the corresponding sodium bicarbonate solution is obtained after the reaction of the reaction solution 16, and is compressed into the decomposition chamber 10 by the waste gas. The temperature sensor 40 is in the decomposition chamber 10, so the displayed temperature of the temperature sensor 40 is the ambient temperature in the decomposition chamber 10, and the sodium bicarbonate solution can be decomposed at this temperature,

d. When the gas flow meter 22 is lower than 10% of the normal flow rate, close the control valve C24, open the control valve B17, the control valve A13 and the pressure reducing valve 20, and the solution in the decomposition chamber 10 passes through the condensation pipe 19 and condenses under the action of gravity. The device 18 flows into the absorption chamber 8, and then closes the control valve B17,

e. Repeat steps a-d to continuously generate carbon dioxide gas.

f. According to the radius of the stirring blade 33 and the lifting speed of the stirring shaft 32, the active magnesium oxide powder delivery rate is set, and the active oxidation is activated by the curing agent delivery pipe 30, the hollow stirring shaft 32 and the curing agent spout 34 in the foundation soil stirring device. The magnesium powder is distributed on the foundation soil 28 from the curing agent storage container 31, and the active magnesium oxide powder and the foundation soil 28 are evenly stirred by the stirring blade 33,

g. Insert the gas introduction pipe 27 vertically into the foundation soil 28, and connect it to the branch pipe 38, open the pressure control valve 37 and the pressure pump 26, and pass the carbon dioxide in the high-pressure gas cylinder 25 through the high-pressure pipe 36, the branch pipe 38, and the introduction pipe 27 And air hole 39 is imported in foundation soil 28, and the carbonization reaction of foundation soil 28 needs to carry out generation magnesium carbonate under sealing film 35.

Example 3

a. Use the anti-corrosion insulation pipe 4 to transfer the industrial waste gas heat after dust removal into the industrial waste gas thermal separation device 5, and the separated waste gas passes into the absorption chamber 8 through the anti-corrosion air guide pipe 6, and the separated heat is introduced through the anti-corrosion heat conduction pipe 7 heating box 9,

b. the reaction solution 16 added in the absorption chamber 8 is potassium hydroxide solution, close the exhaust valve B12, open the control valve A13, after the excess carbon dioxide gas and the solution fully react to generate saturated potassium bicarbonate solution, close the control valve A13 and reduce Pressure valve 20, open control valve B17 and control valve C24, the exhaust gas will press the saturated potassium bicarbonate solution in the absorption chamber 8 into the decomposition chamber 10 through the condensation pipe 19, after the solution completely enters the decomposition chamber 10, close the control valve B17, open the control valve valve A13,

C. the saturated potassium bicarbonate solution in the decomposition chamber 10 decomposes carbon dioxide gas under the effect of heat, wherein the temperature in the decomposition chamber 10 is not lower than the minimum temperature of corresponding potassium bicarbonate solution decomposition, then closes the pressure control valve 37, cools Aspirator 21 passes carbon dioxide gas in the high-pressure gas bottle 25 through air guide tube 23, and wherein corresponding potassium bicarbonate solution is obtained after reaction liquid 16 and waste gas reaction, and is pushed in the decomposition chamber 10 by waste gas. The temperature sensor 40 is in the decomposition chamber 10, so the temperature displayed by the temperature sensor 40 is the ambient temperature in the decomposition chamber 10, and the potassium bicarbonate solution can be decomposed at this temperature,

d. When the gas flow meter 22 is lower than 10% of the normal flow rate, close the control valve C24, open the control valve B17, the control valve A13 and the pressure reducing valve 20, and the solution in the decomposition chamber 10 passes through the condensation pipe 19 and condenses under the action of gravity. The device 18 flows into the absorption chamber 8, and then closes the control valve B17,

e. Repeat steps a-d to continuously generate carbon dioxide gas.

f. according to the radius of the stirring blade 33 and the lifting speed of the stirring shaft 32, the quicklime delivery rate is set, and the quicklime is stored from the curing agent by the curing agent delivery pipe 30, the hollow stirring shaft 32 and the curing agent spout 34 in the foundation soil stirring device The container 31 is distributed on the foundation soil 28, and the quicklime and the foundation soil 28 are uniformly stirred by the stirring blade 33,

g. Insert the gas introduction pipe 27 vertically into the foundation soil 28, and connect it to the branch pipe 38, open the pressure control valve 37 and the pressure pump 26, and pass the carbon dioxide in the high-pressure gas cylinder 25 through the high-pressure pipe 36, the branch pipe 38, and the introduction pipe 27 And air hole 39 is imported in foundation soil 28, and the carbonization reaction of foundation soil 28 needs to carry out generation calcium silicate and calcium carbonate under sealing film 35.

Example 4

a. Use the anti-corrosion insulation pipe 4 to transfer the industrial waste gas heat after dust removal into the industrial waste gas thermal separation device 5, and the separated waste gas passes into the absorption chamber 8 through the anti-corrosion air guide pipe 6, and the separated heat is introduced through the anti-corrosion heat conduction pipe 7 heating box 9,

b. The reaction solution 16 added in the absorption chamber 8 is an equal proportion mixed solution of sodium hydroxide solution and sodium carbonate solution, and the exhaust valve B12 is closed, and the control valve A13 is opened, so that excess carbon dioxide gas and the solution fully react to generate saturated sodium bicarbonate After solution, close control valve A13 and decompression valve 20, open control valve 17 and control valve C24, waste gas will press the saturated sodium bicarbonate solution of absorption chamber 8 in the decomposition chamber 10 through condensation pipe 19, and solution enters decomposition chamber 10 completely After that, close the control valve B17, open the control valve A13,

C. the saturated sodium bicarbonate solution in the decomposition chamber 10 decomposes carbon dioxide gas under the effect of heat, wherein the temperature in the decomposition chamber 10 is not lower than the minimum temperature of the corresponding sodium bicarbonate solution decomposition, then close the pressure control valve 37, cooling Aspirator 21 passes carbon dioxide gas in the high-pressure gas cylinder 25 through the air guide tube 23, wherein the corresponding sodium bicarbonate solution is obtained after the reaction of the reaction solution 16, and is compressed into the decomposition chamber 10 by the waste gas. The temperature sensor 40 is in the decomposition chamber 10, so the displayed temperature of the temperature sensor 40 is the ambient temperature in the decomposition chamber 10, and the sodium bicarbonate solution can be decomposed at this temperature,

d. When the gas flow meter 22 is lower than 10% of the normal flow rate, close the control valve C24, open the control valve B17, the control valve A13 and the pressure reducing valve 20, and the solution in the decomposition chamber 10 passes through the condensation pipe 19 and condenses under the action of gravity. The device 18 flows into the absorption chamber 8, and then closes the control valve B17,

e. Repeat steps a-d to continuously generate carbon dioxide gas.

f. According to the radius of the stirring blade 33 and the lifting speed of the stirring shaft 32, the delivery rate of the mixture of active magnesium oxide powder and unslaked lime is set, through the solidifying agent delivery pipe 30, the hollow stirring shaft 32 and the solidifying agent in the foundation soil stirring device The spout 34 distributes the equal proportion mixture of active magnesium oxide powder and quicklime from the curing agent storage container 31 to the foundation soil 28, and the mixture of active magnesium oxide powder and quicklime equal proportion and the foundation soil 28 are evenly stirred by the stirring blade 33,

g. Insert the gas introduction pipe 27 vertically into the foundation soil 28, and connect it to the branch pipe 38, open the pressure control valve 37 and the pressure pump 26, and pass the carbon dioxide in the high-pressure gas cylinder 25 through the high-pressure pipe 36, the branch pipe 38, and the introduction pipe 27 And air hole 39 is imported in foundation soil 28, and the carbonization reaction of foundation soil 28 needs to carry out generation calcium silicate, calcium carbonate and magnesium carbonate under sealing film 35.

Example 5

a. Use the anti-corrosion insulation pipe 4 to transfer the industrial waste gas heat after dust removal into the industrial waste gas thermal separation device 5, and the separated waste gas passes into the absorption chamber 8 through the anti-corrosion air guide pipe 6, and the separated heat is introduced through the anti-corrosion heat conduction pipe 7 heating box 9,

b. The reaction solution 16 added in the absorption chamber 8 is a 1:3 mixed solution of sodium hydroxide solution and sodium carbonate solution, the exhaust valve B12 is closed, the control valve A13 is opened, and the excess carbon dioxide gas reacts fully with the solution to generate saturated bicarbonate After the sodium solution, close the control valve A13 and the pressure reducing valve 20, open the control valve B17 and the control valve C24, the exhaust gas will press the saturated sodium bicarbonate solution in the absorption chamber 8 into the decomposition chamber 10 through the condenser pipe 19, and the solution will completely enter the decomposition chamber After 10, close the control valve B17, open the control valve A13,

C. the saturated sodium bicarbonate solution in the decomposition chamber 10 decomposes carbon dioxide gas under the effect of heat, wherein the temperature in the decomposition chamber 10 is not lower than the minimum temperature of the corresponding sodium bicarbonate solution decomposition, then close the pressure control valve 37, cooling Aspirator 21 passes carbon dioxide gas in the high-pressure gas cylinder 25 through the air guide tube 23, wherein the corresponding sodium bicarbonate solution is obtained after the reaction of the reaction solution 16, and is compressed into the decomposition chamber 10 by the waste gas. The temperature sensor 40 is in the decomposition chamber 10, so the displayed temperature of the temperature sensor 40 is the ambient temperature in the decomposition chamber 10, and the sodium bicarbonate solution can be decomposed at this temperature,

d. When the gas flow meter 22 is lower than 10% of the normal flow rate, close the control valve C24, open the control valve B17, the control valve A13 and the pressure reducing valve 20, and the solution in the decomposition chamber 10 passes through the condensation pipe 19 and condenses under the action of gravity. The device 18 flows into the absorption chamber 8, and then closes the control valve B17,

e. Repeat steps a-d to continuously generate carbon dioxide gas.

f. According to the radius of the stirring blade 33 and the lifting speed of the stirring shaft 32, the active magnesium oxide powder delivery rate is set, and the active oxidation is activated by the curing agent delivery pipe 30, the hollow stirring shaft 32 and the curing agent spout 34 in the foundation soil stirring device. The magnesium powder is distributed on the foundation soil 28 from the curing agent storage container 31, and the active magnesium oxide powder and the foundation soil 28 are evenly stirred by the stirring blade 33,

g. Insert the gas introduction pipe 27 vertically into the foundation soil 28, and connect it to the branch pipe 38, open the pressure control valve 37 and the pressure pump 26, and pass the carbon dioxide in the high-pressure gas cylinder 25 through the high-pressure pipe 36, the branch pipe 38, and the introduction pipe 27 And air hole 39 is imported in foundation soil 28, and the carbonization reaction of foundation soil 28 needs to carry out generation magnesium carbonate under sealing film 35.

Claims (9)

1. one kind is utilized the treatment system of industrial waste gas thermal consolidating soft foundation, it is characterized in that: comprise waste gas heat separator (5), waste gas purification apparatus, exhaust collection treating apparatus (15), mixing plant, gas pumps into device, the air inlet port of described waste gas heat separator (5) is connected with the back-end sealing of anti-corrosive and thermal insulation pipe (4), the exhaust opening top of anti-corrosive and thermal insulation pipe (4) front end and chimney (1) is tightly connected by flange (2), anti-corrosive and thermal insulation pipe (4) is provided with outlet valve A (3), described waste gas purification apparatus comprises absorption chamber (8) and decomposition chamber (10), absorption chamber (8) bottom is connected by anticorrosion wireway (6) with waste gas heat separator (5), one end of anticorrosion wireway (6) is connected with waste gas heat separator (5), the other end of anticorrosion wireway (6) extend into absorption chamber (8) inner bottom part, the bottom of absorption chamber (8) is communicated with by condensation pipe (19) with the bottom of decomposition chamber (10), condenser (18) is housed on condensation pipe (19), condensation pipe between absorption chamber (8) and condenser (18) is provided with control valve B (17), decomposition chamber (10) is placed in heating cabinet (9), waste gas heat separator (5) is connected by anticorrosion heat pipe (7) with heating cabinet (9), anticorrosion heat pipe (7) one end is connected with waste gas heat separator (5), the other end of anticorrosion heat pipe (7) extend in heating cabinet (9), exhaust collection treating apparatus (15) is connected by anticorrosion wireway (14) with the interior top of absorption chamber (8), anticorrosion wireway (14) is provided with control valve A (13), in decomposition chamber (10), be provided with temperature pick up (40), absorption chamber (8) top is provided with step-down stack (11), step-down stack (11) is provided with outlet valve B (12), described mixing plant comprises a frame (29), shaft (32), multiple stirring vanes (33), curing compound tank (31) and curing compound carrier pipe (30), shaft (32) is vertically attached in a frame (29), shaft (32) is connected by curing compound carrier pipe (30) with curing compound tank (31), described multiple stirring vane (33) is fixed on shaft (32), described gas pumps into device and comprises reducing valve (20), cooling aspiration pump (21), gas flowmeter (22), wireway (23), control valve C (24), gas cylinder (25), compression pump (26), high-voltage tube (36) and pressure-control valve (37), the interior top of decomposition chamber (10) and the interior top of gas cylinder (25) are tightly connected by wireway (23), from decomposition chamber (10) the direction of gas cylinder (25), on wireway (23), be provided with successively reducing valve (20), cooling aspiration pump (21), gas flowmeter (22) and control valve C (24), wherein reducing valve (20) is placed between decomposition chamber (10) top and cooling aspiration pump (21), adjacent with cooling aspiration pump (21) with decomposition chamber (10) top, cooling aspiration pump (21) is placed between reducing valve (20) and gas flowmeter (22), adjacent with gas flowmeter (22) with reducing valve (20), control valve C (24) is placed between gas flowmeter (22) and gas cylinder (25) top, adjacent with gas cylinder (25) top with gas flowmeter (22), compression pump (26) is placed in gas cylinder (25) top, multiple ingress pipes (27) insert in foundation soil (28), described multiple ingress pipe (27) is connected with arm (38) respectively, one end of high-voltage tube (36) is communicated with the interior top of gas cylinder (25), the other end is connected with arm (38) by pressure-control valve (37).

2. a kind for the treatment of system of utilizing industrial waste gas thermal consolidating soft foundation according to claim 1, it is characterized in that: absorption chamber (8), decomposition chamber (10) and heating cabinet (9) are airtight container, in absorption chamber (8), hold reactant liquor (16), decomposition chamber (10) bottom level is not less than the upper plane of reactant liquor (16) in absorption chamber (8), absorption chamber (8) adopts anti-corrosion material to make, and decomposition chamber (10) adopts the material of anticorrosion and heat conduction to make.

3. a kind for the treatment of system of utilizing industrial waste gas thermal consolidating soft foundation according to claim 1 and 2, it is characterized in that: described multiple stirring vanes (33) are by bolt or be welded to connect the low side in shaft (32), shaft (32) is hollow form, described multiple stirring vane (33) is symmetry arrangement, can be 2 or 3 layers, on the shaft (32) between the two-layer stirring vane (33) of shaft low side, be provided with curing compound spout (34).

4. a kind for the treatment of system of utilizing industrial waste gas thermal consolidating soft foundation according to claim 1 and 2, it is characterized in that: ingress pipe (27) is provided with double air vent (39), ingress pipe (27) is connected with arm (38), and foundation soil (28) surface of arm (38) top is covered with diaphragm seal (35).

5. utilize a method for industrial waste gas thermal consolidating soft foundation, it is characterized in that adopting following steps to realize:

A. utilize anti-corrosive and thermal insulation pipe (4) that the industrial waste gas heat after dedusting, desulphurization and denitration is input in waste gas heat separator (5), waste gas after separation passes in absorption chamber (8) by anticorrosion wireway (6), heat after separation imports in heating cabinet (9) by anticorrosion heat pipe (7)

B. in absorption chamber (8), add reactant liquor (16), close outlet valve B (12), open control valve A (13), after waste gas after separation fully reacts with reactant liquor (16), closed control valve A (13) and reducing valve (20), open control valve B (17) and control valve C (24), waste gas is pressed into the reacted solution in absorption chamber (8) in decomposition chamber (10) by condensation pipe (19), solution enters after decomposition chamber (10) completely, closed control valve B (17), open control valve A (13)

C. the solution in decomposition chamber (10) decomposes under pyrolysis, generate carbon dioxide and steam, closing presure control valve (37), cooling aspiration pump (21) is removed the steam generating in gas, and carbon dioxide is passed in gas cylinder (25) by wireway (23)

D. gas flowmeter (22) measure present flow rate lower than normal discharge 10% time, closed control valve C (24), open control valve B (17) and control valve A (13) and reducing valve (20), solution in decomposition chamber (10) flows in absorption chamber (8) through condensation pipe (19) and condenser (18) under Action of Gravity Field, then closed control valve B (17)

E. repeat implementation step a-d, constantly produce gas,

F. according to hoisting velocity and the rotary speed of the radius of stirring vane (33) and shaft (32), curing compound transfer rate is set, by the curing compound carrier pipe (30) in foundation soil mixing plant, shaft (32) and curing compound spout (34), curing compound is sprayed into foundation soil (28) from curing compound tank (31), and pass through stirring vane (33) by curing compound and foundation soil (28) uniform stirring

G. open pressure-control valve (37) and compression pump (26), the gas in gas cylinder (25) is imported in foundation soil (28) by high-voltage tube (36), arm (38), ingress pipe (27) and air vent (39).

6. a kind of method of utilizing industrial waste gas thermal consolidating soft foundation according to claim 5, is characterized in that: the waste gas after described separation comprises carbon dioxide, and described reactant liquor (16) is aqueous slkali or unsaturated carbonate salting liquid.

7. a kind of method of utilizing industrial waste gas thermal consolidating soft foundation according to claim 5, is characterized in that: described curing compound is active oxidation magnesium dust, quicklime powder or both mixtures.

8. a kind of method of utilizing industrial waste gas thermal consolidating soft foundation according to claim 6, it is characterized in that: described reactant liquor (16) is the mixture of sodium hydroxide solution, potassium hydroxide solution, sodium carbonate liquor, solution of potassium carbonate or above-mentioned solution, after reactant liquor (16) reacts in absorption chamber (8), generate bicarbonate solution, and waste gas after separated is pressed in decomposition chamber (10).

9. a kind of method of utilizing industrial waste gas thermal consolidating soft foundation according to claim 5, is characterized in that: the shown interior environment temperature of decomposition chamber (10) of temperature pick up (40) in described decomposition chamber (10) is not less than reactant liquor (16) reaction later and is forced into the minimum temperature of the bicarbonate solution thermal decomposition in decomposition chamber (10).