CN109731438B - Recovery of CO in cement kiln flue gas by white spirit sludge 2 Method and system of (2) - Google Patents
Recovery of CO in cement kiln flue gas by white spirit sludge 2 Method and system of (2) Download PDFInfo
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- CN109731438B CN109731438B CN201910223885.4A CN201910223885A CN109731438B CN 109731438 B CN109731438 B CN 109731438B CN 201910223885 A CN201910223885 A CN 201910223885A CN 109731438 B CN109731438 B CN 109731438B
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- flue gas
- sludge
- white spirit
- cement kiln
- organic
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- 239000010802 sludge Substances 0.000 title claims abstract description 64
- 239000004568 cement Substances 0.000 title claims abstract description 52
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000003546 flue gas Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000011084 recovery Methods 0.000 title abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 239000010815 organic waste Substances 0.000 claims abstract description 29
- 239000000779 smoke Substances 0.000 claims abstract description 27
- 238000003795 desorption Methods 0.000 claims abstract description 24
- 238000004064 recycling Methods 0.000 claims abstract description 12
- 150000002148 esters Chemical class 0.000 claims abstract description 11
- 150000007524 organic acids Chemical class 0.000 claims abstract description 11
- 150000001298 alcohols Chemical class 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000009833 condensation Methods 0.000 claims abstract description 5
- 230000005494 condensation Effects 0.000 claims abstract description 5
- 238000002386 leaching Methods 0.000 claims abstract description 4
- 239000000428 dust Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 239000001569 carbon dioxide Substances 0.000 description 6
- 235000020097 white wine Nutrition 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009919 sequestration Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 238000013124 brewing process Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention firstly provides a method for recycling CO in cement kiln flue gas by using white spirit sludge 2 The method comprises the following steps: step one: firstly, placing white spirit sludge into a desorption container, then, introducing kiln tail smoke of a cement kiln into the desorption container, and leaching for 30-60 min to generate organic mixed smoke; step two: condensing the organic mixed flue gas, wherein CO in the organic mixed flue gas in the condensation process 2 Dissolving in organic waste liquid; step three: will be dissolved with CO 2 Heating the organic waste liquid to separate CO therefrom 2 And collected. The invention has simple process and wide application range, and is applicable to CO in the tail smoke of the cement kiln 2 The method has stronger recovery capacity and higher recovery efficiency, and can desorb organic acid, esters and alcohols in the white spirit sludge to realize pollution control by pollution; in addition, the CO of the invention 2 The recovery cost is low, and the economic benefit and the environmental benefit are good.
Description
Technical Field
The invention relates to CO in cement kiln flue gas 2 In particular to a method for recycling CO in cement kiln flue gas by white spirit sludge 2 Is a method and system of (a).
Background
The cement industry is an important basic industry in national economy, belongs to the energy and resource intensive industry, has large base of coal consumption and is also CO 2 Discharging and amplifying users; cement yield in China is first in the world for nearly thirty years continuously, and CO 2 The emission intensity is higher; CO 2 Belonging to greenhouse gases, which are accumulated to a certain amount and affect the atmospheric environment to cause global warming, thus CO 2 Emission reduction is an important item in protecting the atmosphere.
Carbon Capture and Sequestration (CCS) is a new carbon dioxide recovery and abatement technology for carbon dioxide exiting cement production lines, by which carbon dioxide can be collected and compressed into a liquid before being vented to the atmosphere and transported through pipelines for permanent sequestration into the depths of the ground; or as industrial carbon dioxide or food carbon dioxide by purification. However, carbon dioxide emissions in the cement industry occur mainly in the fuel combustion and limestone decomposition calcination processes, and special, low cost, high efficiency carbon capture technologies are also required for their capture.
The brewing sludge is waste left after water generated in the brewing process reaches the discharge standard after being treated and water is discharged. The treatment of the brewing wastewater does not form scale treatment, reports and researches on brewing sludge are relatively few, and the researches mainly focus on the researches on beer sludge and white wine sludge.
Compared with municipal sludge, the white wine sludge is basically neutral, has similar water content, and has higher organic matter content in the sludge, extremely low amount of toxic substances such as heavy metals and the like, and higher feasibility and value of resource utilization because the raw materials for brewing the white wine are mainly crops and grains. In addition, white wine sludge is rich in organic acid, esters, alcohols and the like, and the substances are difficult to degrade and are main causes of environmental pollution.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a method for recycling CO in cement kiln flue gas by using white spirit sludge 2 The method and the system realize the high-efficiency capturing and collecting of the titanium dioxide in the flue gas of the cement kiln,and simultaneously solves the pollution problem of white spirit sludge.
The technical scheme adopted for solving the technical problems is as follows:
the invention firstly provides a method for recycling CO in cement kiln flue gas by using white spirit sludge 2 Comprises the following steps:
step one: firstly placing white spirit sludge into a desorption container, then introducing kiln tail smoke of a cement kiln into the desorption container, and leaching for 30-60 min to enable organic matters such as organic acid, alcohols and esters in the white spirit sludge to be subjected to thermal desorption, so as to generate organic mixed smoke;
step two: condensing the organic mixed flue gas, wherein CO in the organic mixed flue gas in the condensation process 2 Dissolving in organic waste liquid to remove CO 2 The clean flue gas after entering the kiln tail chimney is discharged;
step three: will be dissolved with CO 2 Heating the organic waste liquid to separate CO therefrom 2 At the same time separate CO 2 Collecting by an enrichment vessel to remove CO 2 And the organic waste liquid is subjected to relevant safe disposal.
Preferably, the temperature of the kiln tail gas of the cement kiln in the step one is 70-180 ℃.
Preferably, the water content of the white spirit sludge in the first step is 60-90%.
Preferably, the temperature of the condensation in step two is in the range of 0 to 40 ℃.
Preferably, the heating in step three is at a temperature in the range 41 to 70 ℃.
The invention also provides a method for recycling CO in the cement kiln flue gas by using the white spirit sludge 2 Comprises a cement kiln tail bag dust collector, a kiln tail chimney and CO 2 The device comprises an enrichment container, a white spirit sludge desorption container, a condenser and a heater; the white spirit sludge desorption container is provided with a white spirit sludge inlet, a cement kiln tail smoke inlet and an organic mixed smoke outlet; the condenser is provided with an organic mixed flue gas inlet, a clean flue gas outlet and CO 2 An organic waste liquid outlet; the heater is provided with CO 2 An organic waste liquid inlet,CO 2 An outlet, an organic waste liquid outlet; the outlet of the cement kiln tail bag dust collector is connected with a cement kiln tail smoke inlet on the white liquor sludge desorption container, the organic mixed smoke outlet of the white liquor sludge desorption container is connected with the organic mixed smoke inlet of the condenser, the clean smoke outlet of the condenser is connected with the kiln tail chimney, and the CO of the condenser is provided 2 CO with organic waste liquid outlet connected with heater 2 Organic waste liquid inlet and CO of heater 2 Outlet connection CO 2 An enrichment vessel.
Preferably, the condenser is a water-cooled condenser, an air-cooled condenser or an evaporative condenser.
Preferably, the heater is an infrared heater or a resistive heater.
The invention has the positive effects that: the invention utilizes the hot smoke gas at the kiln tail of the cement kiln to desorb organic acid, esters and alcohols in the white spirit sludge, and simultaneously utilizes the desorbed organic acid, esters and alcohols to dissolve and absorb CO in the hot smoke gas at the kiln tail 2 In the recovery of CO 2 Simultaneously, the white wine sludge is stabilized, so that the purpose of treating the sewage by using the sewage is achieved. The invention has simple process and wide application range, and is applicable to CO in the tail smoke of the cement kiln 2 Has stronger recovery capability and higher recovery efficiency, and can recover CO in kiln tail flue gas of a cement kiln 2 Meanwhile, organic acid, esters and alcohols in the white spirit sludge are desorbed, so that pollution control by pollution is realized; in addition, the CO of the invention 2 The recovery cost is low, and the economic benefit and the environmental benefit are good.
Drawings
FIG. 1 is a schematic diagram of a method for recycling CO from flue gas of a cement kiln by using white spirit sludge according to an embodiment of the invention 2 Is a schematic of the system.
In the figure, 1, a kiln tail bag dust collector; 2. a kiln tail chimney; 3. CO 2 An enrichment vessel; 4. white wine sludge desorption container; 5. a condenser; 6. a heater.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to FIG. 1, a preferred embodiment of the present invention provides a method for treating a white spirit sludgeRecovery of CO from cement kiln flue gas 2 The method utilizes organic acid, esters and alcohols in white spirit sludge to dissolve and absorb CO in kiln tail gas of a cement kiln 2 To make CO in kiln tail fume 2 The method can recover and stabilize the sludge, and comprises the following specific steps:
step one: firstly placing white spirit sludge into a white spirit sludge desorption container, then introducing kiln tail smoke of a cement kiln into the white spirit sludge desorption container filled with white spirit sludge and fully contacting the white spirit sludge with the white spirit sludge, leaching for 30-60 min to enable organic matters such as organic acid, alcohol and ester in the white spirit sludge to be subjected to thermal desorption, so as to generate organic mixed smoke, and removing the organic matters such as organic acid, alcohol and ester in the white spirit sludge by contacting with the cement kiln tail thermal smoke in the process; wherein the temperature of the kiln tail smoke of the cement kiln is 70-180 ℃, and the water content of the white spirit sludge is 60-90%;
step two: condensing the organic mixed flue gas at 0-40 ℃, wherein CO in the organic mixed flue gas is condensed 2 Dissolving in organic waste liquid to remove CO 2 The clean flue gas after entering the kiln tail chimney is discharged;
step three: will be dissolved with CO 2 Heating the organic waste liquid at 41-70 ℃ to separate CO therefrom 2 At the same time separate CO 2 Collecting by an enrichment vessel to remove CO 2 And the organic waste liquid is subjected to relevant safe disposal.
Referring to fig. 1, the embodiment also provides a method for recycling CO in cement kiln flue gas by using white spirit sludge 2 Comprises a cement kiln tail bag dust collector 1, a kiln tail chimney 2 and CO 2 An enrichment vessel 3, a white spirit sludge desorption vessel 4, a condenser 5 and a heater 6; the white spirit sludge desorption container 4 is provided with a white spirit sludge inlet, a cement kiln tail smoke inlet and an organic mixed smoke outlet; the condenser 5 is provided with an organic mixed flue gas inlet, a clean flue gas outlet and CO 2 An organic waste liquid outlet; the heater 6 is provided with CO 2 Organic waste liquid inlet and CO 2 An outlet, an organic waste liquid outlet; by a means ofThe outlet of the cement kiln tail bag dust collector 1 is connected with a cement kiln tail flue gas inlet on the white liquor sludge desorption container 4, the organic mixed flue gas outlet of the white liquor sludge desorption container 4 is connected with the organic mixed flue gas inlet of the condenser 5, the clean flue gas outlet of the condenser 5 is connected with the kiln tail chimney 2, and the CO of the condenser 5 2 CO with the organic waste liquid outlet connected with the heater 6 2 Organic waste liquid inlet, CO of heater 6 2 Outlet connection CO 2 And a collection container.
The condenser is not particularly limited as long as it can condense the organic mixed flue gas into an organic waste liquid at a temperature of 0 to 40 ℃, and for example, a water-cooled condenser, an air-cooled condenser, an evaporative condenser, or the like can be used.
Further, the heater is not particularly limited as long as it can make CO 2 The CO is separated out from the organic waste liquid at the temperature of 41-70 DEG C 2 That is, for example, a heater in the form of an infrared heater, a resistance heater, or the like may be used.
In conclusion, the invention provides the CO in the cement kiln flue gas, which is simple and convenient to operate and high in operation efficiency 2 The recovery method and system have wide application range, and are applicable to CO in kiln tail gas of cement kiln 2 Has stronger recovery capability and higher recovery efficiency, and the technical cost performance is better than that of the CO of the kiln tail smoke of other cement kilns 2 Recovery techniques. The method recovers CO in the tail flue gas of the cement kiln 2 Can be used for additionally desorbing organic matters such as organic acid, esters, alcohols and the like in the white spirit sludge, namely the invention can effectively reduce CO in kiln tail smoke 2 The concentration of the white spirit sludge is achieved, the purpose of carbon emission reduction of kiln tail smoke of the cement kiln is achieved, and white spirit sludge can be stabilized.
The foregoing description of the preferred embodiments of the present invention has been presented only to facilitate the understanding of the principles of the invention and its core concepts, and is not intended to limit the scope of the invention in any way, however, any modifications, equivalents, etc. which fall within the spirit and principles of the invention should be construed as being included in the scope of the invention.
Claims (6)
1. The method for recycling CO2 in the cement kiln flue gas by using the white spirit sludge is characterized by comprising the following steps of:
step one: firstly placing white spirit sludge into a desorption container, then introducing kiln tail smoke of a cement kiln into the desorption container, and leaching for 30-60 min to enable organic matters such as organic acid, alcohols and esters in the white spirit sludge to be subjected to thermal desorption, so as to generate organic mixed smoke;
step two: condensing the organic mixed flue gas, dissolving CO2 in the organic mixed flue gas in an organic waste liquid in the condensation process, and discharging the clean flue gas after CO2 removal into a kiln tail chimney;
step three: heating the organic waste liquid dissolved with CO2 to separate CO2 from the organic waste liquid, and simultaneously introducing the separated CO2
The organic waste liquid with CO2 removed is collected by an enrichment container and then is subjected to relevant safe disposal.
2. The method for recycling CO2 in cement kiln flue gas by using white spirit sludge according to claim 1, wherein the method comprises the following steps: step by step
The temperature of the kiln tail flue gas of the cement kiln in the step one is 70-180 ℃.
3. The method for recycling CO2 in cement kiln flue gas by using white spirit sludge according to claim 1, wherein the method comprises the following steps: step by step
The water content of the white spirit sludge in the step one is 60-90%.
4. A method for recycling CO2 in cement kiln flue gas by white spirit sludge according to claim 1, 2 or 3, characterized in that
The method comprises the following steps: the temperature range of the condensation in the second step is 0-40 ℃.
5. A method for recycling CO2 in cement kiln flue gas by white spirit sludge according to claim 1, 2 or 3, characterized in that
The method comprises the following steps: and in the third step, the heating temperature is 41-70 ℃.
6. The utility model provides a system for retrieve CO2 in cement kiln flue gas with white spirit mud, includes cement kiln tail bag dust collector, kiln tail chimney, its characterized in that: the device also comprises a CO2 enrichment container, a white spirit sludge desorption container, a condenser and a heater; the white spirit sludge desorption container is provided with a white spirit sludge inlet, a cement kiln tail smoke inlet and an organic mixed smoke outlet; the condenser is provided with an organic mixed flue gas inlet, a clean flue gas outlet and a CO2 organic waste liquid outlet; the heater is provided with a CO2 organic waste liquid inlet, a CO2 outlet and an organic waste liquid outlet; the outlet of the cement kiln tail bag dust collector is connected with a cement kiln tail flue gas inlet on the white liquor sludge desorption container, the organic mixed flue gas outlet of the white liquor sludge desorption container is connected with an organic mixed flue gas inlet of a condenser, the clean flue gas outlet of the condenser is connected with a kiln tail chimney, the CO2 organic waste liquid outlet of the condenser is connected with a CO2 organic waste liquid inlet of a heater, the CO2 outlet of the heater is connected with a CO2 enrichment container, the condenser is a water-cooled condenser, an air-cooled condenser or an evaporative condenser, and the heater is an infrared heater or a resistance heater.
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CN201910223885.4A CN109731438B (en) | 2019-03-22 | 2019-03-22 | Recovery of CO in cement kiln flue gas by white spirit sludge 2 Method and system of (2) |
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CN201910223885.4A CN109731438B (en) | 2019-03-22 | 2019-03-22 | Recovery of CO in cement kiln flue gas by white spirit sludge 2 Method and system of (2) |
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CN109731438A CN109731438A (en) | 2019-05-10 |
CN109731438B true CN109731438B (en) | 2024-02-20 |
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SU1214177A1 (en) * | 1983-11-28 | 1986-02-28 | Рубежанский филиал Ворошиловградского машиностроительного института | Apparatus for cleaning gases |
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