CN113636731A - Method for efficiently utilizing intermediate state substances in cement production to dry and dispose sludge - Google Patents
Method for efficiently utilizing intermediate state substances in cement production to dry and dispose sludge Download PDFInfo
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- CN113636731A CN113636731A CN202111055902.1A CN202111055902A CN113636731A CN 113636731 A CN113636731 A CN 113636731A CN 202111055902 A CN202111055902 A CN 202111055902A CN 113636731 A CN113636731 A CN 113636731A
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- sludge
- drying
- decomposing furnace
- raw material
- raw materials
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- 239000010802 sludge Substances 0.000 title claims abstract description 58
- 239000004568 cement Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000126 substance Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 46
- 238000001035 drying Methods 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000002912 waste gas Substances 0.000 claims abstract description 13
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000292 calcium oxide Substances 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 230000029087 digestion Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 235000012054 meals Nutrition 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of sludge treatment, and discloses a method for efficiently utilizing cement to produce intermediate substances to dry and treat sludge, which comprises the following steps: the method comprises the following steps: taking out intermediate state substance in cement production, hot raw material rich in calcium oxide and hot air mixture from preheating pre-decomposition device of cement production system, and regulating temperature of mixed material by feeding quantity of cold raw material. According to the invention, a certain amount of dust-containing high-temperature gas is extracted from the upper part of the decomposing furnace, cold raw materials are added for temperature regulation, gas-solid separation is carried out through a cyclone separator, the temperature range of the mixed hot raw materials is 300-850 ℃, the mixed hot raw materials are mixed and heated with sludge in the drying and digesting all-in-one machine, simultaneously, a large amount of calcium oxide contained in the hot raw materials and free moisture in the sludge are subjected to digestion reaction, the sludge drying progress is accelerated, the sludge drying degree is deepened, and the finished dried sludge enters a combustion area of the decomposing furnace through an air locking device to be incinerated. And returning the medium-low temperature waste gas at the outlet of the cyclone mixing separator to the inlet of any one stage of preheater according to the requirement.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a method for efficiently utilizing cement to produce intermediate substances to dry and treat sludge.
Background
In the production process of cement clinker, an intermediate state substance high-temperature powdery material can be produced, the application degree of the intermediate state substance high-temperature powdery material in the prior art is low, and the intermediate state substance high-temperature powdery material cannot be effectively utilized to directly treat the sludge.
Therefore, the application provides a method for efficiently utilizing the intermediate state substances in the cement production to dry and dispose the sludge, and the drying and digestion integrated equipment is additionally arranged, so that the organic sludge is dried and then enters a cement kiln to be cooperatively incinerated for disposal.
Disclosure of Invention
The invention aims to provide a method for efficiently utilizing cement to produce intermediate substances to dry and dispose sludge, and solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a method for efficiently utilizing cement to produce intermediate substances to dry and dispose sludge comprises the following steps:
the method comprises the following steps: taking out intermediate substances in cement production, a hot raw material rich in calcium oxide and a hot air mixture from a preheating pre-decomposition device of a cement production system, adjusting the temperature of the mixed material through the feeding amount of a cold raw material, realizing gas-material separation of the hot raw material and the hot air mixture through a newly added cyclone separator, and mixing, heating and reacting the hot raw material and sludge in a drying and digesting integrated machine; the dried sludge and raw material mixture enters a combustion area of the decomposing furnace through an air locking device;
step two: the dried waste gas containing water vapor is introduced into the upper part of the decomposing furnace, so that the combustion of coal powder and the decomposition of calcium carbonate in the furnace are not influenced; after high-temperature incineration, the organic matters are completely incinerated, and the environment-friendly emission is up to the standard.
As a preferred embodiment of the present invention, the cyclone separator in the first step divides a certain amount of cold raw materials from the kiln inlet air chute into the cyclone separator, controls the temperature range of the mixed hot raw materials to be 300-850 ℃, and mixes a large amount of calcium oxide contained in the hot raw materials to perform a digestion reaction with free moisture in the sludge, so as to accelerate the sludge drying progress and deepen the sludge drying degree.
As a preferred embodiment of the invention, the mixture of the dried sludge and the raw meal in the first step directly enters a combustion area of the decomposing furnace through an air locking device; as a further optimization scheme, a storage metering device can be arranged, and the feeding amount of the decomposing furnace can be adjusted in a planned way according to the working conditions of the decomposing furnace and the rotary kiln.
As a preferred embodiment of the present invention, the cyclone separator in the first step realizes that the outlet flue gas after gas-material separation is returned to the inlet of any one stage of preheater as required.
In a preferred embodiment of the present invention, the air outlet pipe of the cyclone separator in the first step is provided with a damper for adjusting the amount of air and the amount of hot raw material extracted from the decomposing furnace.
In a preferred embodiment of the present invention, the dried exhaust gas in the second step is incinerated at a high temperature in an alkaline environment at 850 ℃ for 2 seconds or more in a decomposing furnace.
Compared with the prior art, the invention has the following beneficial effects:
a certain amount of dust-containing high-temperature gas is extracted from the upper part of a decomposing furnace, cold raw materials are added for temperature regulation, gas-solid separation is carried out through a cyclone separator, the temperature range of the mixed hot raw materials is 300-850 ℃, the mixed hot raw materials are mixed with sludge and heated in a drying and digesting integrated machine, meanwhile, a large amount of calcium oxide contained in the hot raw materials and free moisture in the sludge are subjected to digestion reaction, the sludge drying progress is accelerated, the sludge drying degree is deepened, and the finished dried sludge enters a combustion area of the decomposing furnace through an air locking device to be incinerated. And returning the medium-low temperature waste gas at the outlet of the cyclone mixing separator to the inlet of any one stage of preheater according to the requirement. And introducing the sludge drying waste gas containing water vapor into the upper part of the decomposing furnace for further incineration disposal.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a flow chart of the method for efficiently utilizing cement to produce intermediate substances for drying and disposing sludge according to the invention.
In the figure: 1. a cyclone separator; 2. a drying and digesting integrated machine; 3. a sludge storage and conveying system; 4. an air locking blanking device a; 5. an air damper; 6. a wind locking blanking device b; 7. A decomposing furnace; 8. a feed air chute; 9. a rotary kiln; c1, primary preheater; c2, a secondary preheater; c3, a tertiary preheater; c4, a four-stage preheater; c5, five-stage preheater.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed; the type of the electrical appliance provided by the invention is only used for reference. For those skilled in the art, different types of electrical appliances with the same function can be replaced according to actual use conditions, and for those skilled in the art, the specific meaning of the above terms in the present invention can be understood in specific situations.
Referring to fig. 1, the present invention provides a technical solution: the method for efficiently utilizing the cement to produce the intermediate substance to dry and dispose the sludge comprises the following steps:
the method comprises the following steps: taking out intermediate substances in cement production, a hot raw material rich in calcium oxide and a hot air mixture from a preheating pre-decomposition device of a cement production system, adjusting the temperature of the mixed material through the feeding amount of a cold raw material, realizing gas-material separation of the hot raw material and the hot air mixture through a newly added cyclone separator, and mixing, heating and reacting the hot raw material and sludge in a drying and digesting integrated machine; the dried sludge and raw material mixture enters a combustion area of the decomposing furnace through an air locking device;
step two: the dried waste gas containing water vapor is introduced into the upper part of the decomposing furnace, so that the combustion of coal powder and the decomposition of calcium carbonate in the furnace are not influenced; after high-temperature incineration, the organic matters are completely incinerated, and the environment-friendly emission is up to the standard.
And the cyclone separator in the first step divides a certain amount of cold raw materials from the kiln inlet air chute to enter the cyclone separator, controls the temperature range of the mixed hot raw materials to be 300-850 ℃, and ensures that a large amount of calcium oxide contained in the mixed hot raw materials and free moisture in sludge are subjected to digestion reaction, thereby accelerating the sludge drying progress and deepening the sludge drying degree.
Wherein the mixture of the sludge and the raw meal after drying in the first step directly enters a combustion area of the decomposing furnace through an air locking device; as a further optimization scheme, a storage metering device can be arranged, and the feeding amount of the decomposing furnace can be adjusted in a planned way according to the working conditions of the decomposing furnace and the rotary kiln.
And the cyclone separator in the first step realizes the air outlet waste gas after the gas and the material are separated, and returns to the inlet of any one stage of preheater according to the requirement.
And (3) arranging an air adjusting door on an air outlet pipe of the cyclone separator in the step one, and adjusting the air quantity and the hot raw material quantity extracted from the decomposing furnace.
And B, incinerating the dried waste gas in the step B at high temperature of 850 ℃ in an alkaline environment for more than 2 seconds by using a decomposing furnace.
The method comprises the following steps that dried sludge waste gas containing water vapor is connected to the upper part of a decomposing furnace for further incineration disposal, cement production intermediate substances are taken out from a preheating pre-decomposing device of a cement production system, a hot raw material and hot air mixture rich in calcium oxide is adjusted in temperature through the feeding amount of cold raw material, the hot raw material and hot air mixture is separated from gas and material through a newly-added cyclone separator, the hot raw material and sludge are mixed, heated and reacted with sludge in a drying and digesting all-in-one machine, the dried sludge and raw material mixture enters a combustion area of the decomposing furnace through an air locking device, and the dried waste gas containing water vapor is connected to the upper part of the decomposing furnace without affecting pulverized coal combustion and calcium carbonate decomposition in the furnace; the invention extracts a certain amount of dust-containing high-temperature gas from the upper part of a decomposing furnace, adds cold raw material for temperature regulation, then carries out gas-solid separation by a cyclone separator, mixes the mixed hot raw material with sludge in a drying and digesting integrated machine at 850 ℃, simultaneously carries out digestion reaction on a large amount of calcium oxide contained in the hot raw material and free moisture in the sludge, accelerates the sludge drying progress, deepens the sludge drying degree, and leads the finished dried sludge to enter a combustion area of the decomposing furnace for incineration disposal by an air locking device. And returning the medium-low temperature waste gas at the outlet of the cyclone mixing separator to the inlet of any one stage of preheater according to the requirement.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The method for drying and disposing the sludge by efficiently utilizing the intermediate substance in the cement production is characterized by comprising the following steps of:
the method comprises the following steps: taking out intermediate substances in cement production, a hot raw material rich in calcium oxide and a hot air mixture from a preheating pre-decomposition device of a cement production system, adjusting the temperature of the mixed material through the feeding amount of a cold raw material, realizing gas-material separation of the hot raw material and the hot air mixture through a newly added cyclone separator, and mixing, heating and reacting the hot raw material and sludge in a drying and digesting integrated machine; the dried sludge and raw material mixture enters a combustion area of the decomposing furnace through an air locking device;
step two: the dried waste gas containing water vapor is introduced into the upper part of the decomposing furnace, so that the combustion of coal powder and the decomposition of calcium carbonate in the furnace are not influenced; after high-temperature incineration, the organic matters are completely incinerated, and the environment-friendly emission is up to the standard.
2. The method for efficiently utilizing cement to produce intermediate substances for drying and disposing sludge according to claim 1, wherein the method comprises the following steps: and the cyclone separator in the first step divides a certain amount of cold raw materials from the kiln inlet air chute to enter the cyclone separator, controls the temperature range of the mixed hot raw materials to be 300-850 ℃, and ensures that a large amount of calcium oxide contained in the mixed hot raw materials and free moisture in the sludge are subjected to digestion reaction, thereby accelerating the sludge drying progress and deepening the sludge drying degree.
3. The method for efficiently utilizing cement to produce intermediate substances for drying and disposing sludge according to claim 1, wherein the method comprises the following steps: the mixture of the sludge and the raw materials after drying in the first step directly enters a combustion area of the decomposing furnace through an air locking device; as a further optimization scheme, a storage metering device can be arranged, and the feeding amount of the decomposing furnace can be adjusted in a planned way according to the working conditions of the decomposing furnace and the rotary kiln.
4. The method for efficiently utilizing cement to produce intermediate substances for drying and disposing sludge according to claim 1, wherein the method comprises the following steps: and the cyclone separator in the first step realizes the air outlet waste gas after gas-material separation and returns to the inlet of any one stage of preheater as required.
5. The method for efficiently utilizing cement to produce intermediate substances for drying and disposing sludge according to claim 1, wherein the method comprises the following steps: and (3) arranging an air adjusting door on an air outlet pipe of the cyclone separator in the step one, and adjusting the air quantity and the hot raw material quantity extracted from the decomposing furnace.
6. The method for efficiently utilizing cement to produce intermediate substances for drying and disposing sludge according to claim 1, wherein the method comprises the following steps: and (5) incinerating the dried waste gas in the second step at high temperature of 850 ℃ in an alkaline environment for more than 2 seconds by using a decomposing furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111055902.1A CN113636731A (en) | 2021-09-09 | 2021-09-09 | Method for efficiently utilizing intermediate state substances in cement production to dry and dispose sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111055902.1A CN113636731A (en) | 2021-09-09 | 2021-09-09 | Method for efficiently utilizing intermediate state substances in cement production to dry and dispose sludge |
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| CN113636731A true CN113636731A (en) | 2021-11-12 |
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| CN202111055902.1A Pending CN113636731A (en) | 2021-09-09 | 2021-09-09 | Method for efficiently utilizing intermediate state substances in cement production to dry and dispose sludge |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN102241470A (en) * | 2011-05-27 | 2011-11-16 | 赵向东 | Sludge treatment and disposal method and system by combining calcium-added heat drying and cement rotary kiln |
| EP2676941A1 (en) * | 2012-06-21 | 2013-12-25 | Carbon-Hydrogen-Minerals SPRL | Process and plant for cement clinker production |
| CN103626380A (en) * | 2013-11-20 | 2014-03-12 | 同济大学 | Method for further dehydration of lime-dried urban domestic sewage sludge in cement kiln before treatment |
| CN103739184A (en) * | 2014-01-22 | 2014-04-23 | 桂林理工大学 | Method for drying and direct blending combustion of domestic sludge by using dry-process cement kiln waste heat |
| CN103896505A (en) * | 2014-03-25 | 2014-07-02 | 同济大学 | Method for adjusting and controlling feeding mode of lime-dried municipal sludge cooperatively treated with cement kiln |
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2021
- 2021-09-09 CN CN202111055902.1A patent/CN113636731A/en active Pending
Patent Citations (7)
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| WO2011018977A1 (en) * | 2009-08-11 | 2011-02-17 | 太平洋セメント株式会社 | Organic sludge drying system and drying method |
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| EP2676941A1 (en) * | 2012-06-21 | 2013-12-25 | Carbon-Hydrogen-Minerals SPRL | Process and plant for cement clinker production |
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| CN103739184A (en) * | 2014-01-22 | 2014-04-23 | 桂林理工大学 | Method for drying and direct blending combustion of domestic sludge by using dry-process cement kiln waste heat |
| CN103896505A (en) * | 2014-03-25 | 2014-07-02 | 同济大学 | Method for adjusting and controlling feeding mode of lime-dried municipal sludge cooperatively treated with cement kiln |
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