CN103438464A - Method for incinerating industrial sludge containing hazardous wastes - Google Patents
Method for incinerating industrial sludge containing hazardous wastes Download PDFInfo
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- CN103438464A CN103438464A CN2013104029589A CN201310402958A CN103438464A CN 103438464 A CN103438464 A CN 103438464A CN 2013104029589 A CN2013104029589 A CN 2013104029589A CN 201310402958 A CN201310402958 A CN 201310402958A CN 103438464 A CN103438464 A CN 103438464A
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Abstract
The invention discloses a method for incinerating industrial sludge containing hazardous wastes. The method comprises the steps of drying the industrial sludge containing hazardous wastes to be treated so as to obtain dry sludge of low moisture content and gas, condensing the gas to obtain wastewater and uncondensed gas, and incinerating the uncondensed gas and the dry sludge of low moisture content. The method has the advantages that the incinerating pressure of an incinerating kiln is decreased, the service life of the incinerating kiln is guaranteed, the treatment cost can be reduced greatly, and the treatment capacity is increased.
Description
Technical field
The present invention relates to a kind of incinerating method of hazardous waste, particularly a kind of containing hazardous waste industrial sludge incinerating method.
Background technology
Hazardous waste refers to lists national Hazardous Waste List in or according to the hazardous waste judging standard of national regulation and the discarded object with hazard property of discrimination method identification.Hazardous waste has toxicity, inflammability, explosivity, corrosivity, chemical reactivity or infectiousness, can form serious harm to ecological environment and human health.
Hazardous waste because of its can to environment even human body cause and have a strong impact on, thereby must safe deal carefully with disposal.The basic principle of Hazardous Wastes Management Prevention Technique policy is minimizing, the resource and innoxious of hazardous waste; Prevent as far as possible and reduce the generation of hazardous waste; The dangerous gurry produced is passed through to recycle as far as possible, reduce hazardous waste and process the disposal amount; Can not recycle with the hazardous waste of resource and should carry out safe disposal; The final disposal means that security landfill is hazardous waste.
At present, the hazardous waste that industry is produced, particularly generally adopt with the auxiliary fuel incinerating method and process containing the hazardous waste industrial sludge.Because the water content of this discarded object is higher, generally enter the water content of stokehold 40%～80%, this discarded object directly burns in incinerator, and the fuel adopted during burning is more, and energy consumption is large, burns cost higher; In addition, the discharge capacity of the tail gas of this processing mode is larger, and the input of tail gas treatment device also can correspondingly increase, and processes the tail gas cost higher; Besides because this discarded object moisture is more, also larger on the impact in service life of equipment, be generally about 300 days stove service life of burning use.At present, discharge, containing the enterprise of hazardous waste industrial sludge, pay for the processing of one ton of discarded object the disposal cost of 3500 yuan of left and right.
Summary of the invention
The object of the invention is to, provide a kind of containing hazardous waste industrial sludge incinerating method.The present invention alleviates the burning pressure of incinerating kiln, guarantees service life of equipment, also can significantly reduce processing cost, improves treating capacity.
Technical scheme of the present invention: containing hazardous waste industrial sludge incinerating method, it is characterized in that: pending obtained to dry mud and the gas that moisture content is lower containing the first drying of hazardous waste industrial sludge, condensation of gas is obtained to waste water and uncondensed gas, then uncondensed gas and the lower dry mud of moisture content are burned.
Aforesaid containing in hazardous waste industrial sludge incinerating method, pending obtained to dry mud and the gas that moisture content is lower containing the hazardous waste industrial sludge by contact drying.
Aforesaid containing in hazardous waste industrial sludge incinerating method, by pending being placed in airtight container containing the hazardous waste industrial sludge, container is heated, stirred containing the hazardous waste industrial sludge in container simultaneously, thereby realized contact drying.
Aforesaid containing in hazardous waste industrial sludge incinerating method, the dry mud that described moisture content is lower is that moisture content is about 10% dry mud.
Aforesaid containing in hazardous waste industrial sludge incinerating method, the moisture content of the dry mud that described moisture content is lower is 10%.
Aforesaid containing in hazardous waste industrial sludge incinerating method, described uncondensed gas is comprised of escaping gas and steam.
Aforesaid containing in hazardous waste industrial sludge incinerating method, described uncondensed gas and the lower dry mud of moisture content are carried out to burning disposal after, heat is obtained to heat carrier by the heat mode of changing, heat carrier is with opposing containing the thermal source of hazardous waste industrial sludge drying.
Aforesaid containing in hazardous waste industrial sludge incinerating method, the described hazardous waste industrial sludge that contains is containing heavy metal, contains the dye chemical industry refuse or/and contain the industrial sludge of pigment chemical industry refuse.
Compared with prior art, the present invention by being preheated containing the hazardous waste industrial sludge processing before burning in closed container, make a part of water be separated, reduced moisture content, greatly reduce owing to burning the moisture containing the hazardous waste industrial sludge in operation, make identical incineration temperature significantly to save by supplementary fuel; The tail gas amount significantly reduces, and exhaust system investment and treating capacity greatly reduce, and processing cost significantly descends (processing cost of the present invention is per ton below 1000 yuan, and the processing cost of waste water is 10 yuan per ton), can save 70% processing cost.Also by the heat recovery that produces and for the link of self operation (containing the predrying use of hazardous waste industrial sludge), recovery utilization rate high (up to 95%).It containing the predrying operation of hazardous waste industrial sludge, is the mode that adopts contact drying, the steam that drying is evaporated and escaping gas are first by condensation, most of water is discharged with liquid form more than 90%, all the other steam enter incinerating kiln with burning together with the hazardous waste industrial sludge with escaping gas, therefore process very thorough, pollution-free, environmental protection.Tail gas heating is without another consumption fuel, directly with reclaiming heat.Discarded object water content in incinerating kiln is lower, has alleviated treating capacity, has improved the service life (service life is generally about 2 years) of incinerating kiln, and the incinerating kiln temperature is also easy to control.Compare existing burning process, higher containing the water content of hazardous waste industrial sludge, the present invention is more energy-conservation, and processing cost is lower.The present invention processes thoroughly, and operational stability is high, and the continuous long service life of equipment, obtained extraordinary economic benefit.The present invention is particularly suitable for discharge containing the enterprise of hazardous waste industrial sludge discarded object by oneself.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated, but not as the foundation to the present invention's restriction.
Embodiment.Containing hazardous waste industrial sludge incinerating method, pending obtained to dry mud and the gas that moisture content is lower containing the first drying of hazardous waste industrial sludge (as containing heavy metal, containing the dye chemical industry refuse, containing pigment chemical industry refuse), condensation of gas is obtained to waste water and uncondensed gas, then uncondensed gas and the lower dry mud thing of moisture content are burned.
Describedly containing the hazardous waste industrial sludge, can be containing heavy metal, containing the dye chemical industry refuse, belong to the industrial sludge of hazardous waste containing the national regulation such as pigment chemical industry refuse.
Pending obtained to dry mud and the gas that moisture content is lower containing the hazardous waste industrial sludge by contact drying.
By pending being placed in airtight container containing the hazardous waste industrial sludge, container is heated, stirred containing the hazardous waste industrial sludge in container simultaneously, thereby realized contact drying.Be preferably, by pending being placed in airtight container containing the heavy metal industrial sludge, and make this containing the continuous-flow in container of heavy metal industrial sludge, and container is heated, in container, to containing the heavy metal industrial sludge, stirred simultaneously, like this to industrial sludge carry out continuously, indirect stir, can make the moisture additional issue in industrial sludge very fast, can also make moisture content lower.
The dry mud that described moisture content is lower is that moisture content is about 10% industrial sludge.The moisture content of the dry mud that preferably, described moisture content is lower is 10%.
Described gas is escaping gas and steam.
Described uncondensed gas is comprised of escaping gas and steam.
Described uncondensed gas and the lower dry mud of moisture content are carried out to burning disposal after, heat is obtained to heat carrier by the heat mode of changing, heat carrier is with opposing containing the thermal source of hazardous waste industrial sludge drying.
It containing the predrying operation of hazardous waste industrial sludge, is the mode that adopts contact drying, the steam that drying is evaporated and escaping gas are first by condensation, most of water is discharged with liquid form more than 90%, all the other steam enter incinerating kiln with escaping gas and burn together with hazardous waste, therefore process very thorough, pollution-free, environmental protection.
Concrete embodiment of the present invention is as shown in Figure 1, hazardous waste is placed in to drying system to be sealed into and to connect heating in the ranks, produce solid and gas (steam and escaping gas), gas carries out the condensation dehydration, most steam is condensed into to water drains, residual water vapor (accounting for 10% left and right of total steam) and escaping gas carry out secondary burning together with solid in incinerating kiln, heat heat after burning is changed on heat carrier, most of heat of heat carrier provides heat for drying system, tail gas after heat is changed carries out dry desulfurization, carry out successively again charcoal absorption, bag-type dust, air-introduced machine transmits, the shower cooling, the spray column alkali cleaning, the spray column washing, finally being heated (after-heat on the available heat carrier) discharges.
Claims (7)
1. containing hazardous waste industrial sludge incinerating method, it is characterized in that: pending obtained to dry mud and the gas that moisture content is lower containing the first drying of hazardous waste industrial sludge, condensation of gas is obtained to waste water and uncondensed gas, then uncondensed gas and the lower dry mud of moisture content are burned.
2. according to claim 1 containing hazardous waste industrial sludge incinerating method, it is characterized in that: pending obtained to dry mud and the gas that moisture content is lower containing the hazardous waste industrial sludge by contact drying.
3. according to claim 2 containing hazardous waste industrial sludge incinerating method, it is characterized in that: by pending being placed in airtight container containing the hazardous waste industrial sludge, container is heated, stirred containing the hazardous waste industrial sludge in container simultaneously, thereby realize contact drying.
4. according to claim 1 containing hazardous waste industrial sludge incinerating method, it is characterized in that: the dry mud that described moisture content is lower be that moisture content is about 10% dry mud.
5. according to claim 4 containing hazardous waste industrial sludge incinerating method, it is characterized in that: the moisture content of the dry mud that described moisture content is lower is 10%.
6. according to claim 1 containing hazardous waste industrial sludge incinerating method, it is characterized in that: described uncondensed gas is comprised of escaping gas and steam.
7. described containing hazardous waste industrial sludge incinerating method according to the arbitrary claim of claim 1-6, it is characterized in that: described uncondensed gas and the lower dry mud of moisture content are carried out to burning disposal after, heat is obtained to heat carrier by the heat mode of changing, and heat carrier is with opposing containing the thermal source of hazardous waste industrial sludge drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013104029589A CN103438464A (en) | 2013-09-06 | 2013-09-06 | Method for incinerating industrial sludge containing hazardous wastes |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013104029589A CN103438464A (en) | 2013-09-06 | 2013-09-06 | Method for incinerating industrial sludge containing hazardous wastes |
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| CN103438464A true CN103438464A (en) | 2013-12-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2004997A (en) * | 1977-09-29 | 1979-04-11 | Elf Aquitaine | Method for incinerating sludges |
| US4926764A (en) * | 1989-08-17 | 1990-05-22 | Den Broek Jos Van | Sewage sludge treatment system |
| CN101857350A (en) * | 2010-06-04 | 2010-10-13 | 合肥水泥研究设计院 | Device for indirectly drying and utilizing sludge by cement kiln waste gas and process method thereof |
| CN102583945A (en) * | 2012-01-13 | 2012-07-18 | 哈尔滨工业大学 | Sludge multi-stage drying device, fluidized bed combustion treatment device and fluidized bed combustion treatment method |
| US20120200092A1 (en) * | 2008-04-07 | 2012-08-09 | Wastedry, Llc | Systems and Methods for Processing Municipal Wastewater Treatment Sewage Sludge |
| CN102701564A (en) * | 2012-06-26 | 2012-10-03 | 绍兴文理学院 | Sludge drying method |
-
2013
- 2013-09-06 CN CN2013104029589A patent/CN103438464A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2004997A (en) * | 1977-09-29 | 1979-04-11 | Elf Aquitaine | Method for incinerating sludges |
| US4926764A (en) * | 1989-08-17 | 1990-05-22 | Den Broek Jos Van | Sewage sludge treatment system |
| US20120200092A1 (en) * | 2008-04-07 | 2012-08-09 | Wastedry, Llc | Systems and Methods for Processing Municipal Wastewater Treatment Sewage Sludge |
| CN101857350A (en) * | 2010-06-04 | 2010-10-13 | 合肥水泥研究设计院 | Device for indirectly drying and utilizing sludge by cement kiln waste gas and process method thereof |
| CN102583945A (en) * | 2012-01-13 | 2012-07-18 | 哈尔滨工业大学 | Sludge multi-stage drying device, fluidized bed combustion treatment device and fluidized bed combustion treatment method |
| CN102701564A (en) * | 2012-06-26 | 2012-10-03 | 绍兴文理学院 | Sludge drying method |
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Application publication date: 20131211 |