CN209735313U - a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment - Google Patents
a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment Download PDFInfo
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- CN209735313U CN209735313U CN201920293878.7U CN201920293878U CN209735313U CN 209735313 U CN209735313 U CN 209735313U CN 201920293878 U CN201920293878 U CN 201920293878U CN 209735313 U CN209735313 U CN 209735313U
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- 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
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Abstract
The utility model provides a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment, including the scrubbing tower, locate inside and a plurality of packing layers bodies, circulating water cooler, the automatic alkali device and the salinity adjusting device that distribute from bottom to top of scrubbing tower. The pretreatment system adopts a mode of combining a plurality of packing layer bodies to fully remove harmful substances such as dust, SO2 and the like in the flue gas, thereby improving the washing efficiency and achieving the purpose of reducing the temperature of the flue gas; the outside of the washing tower is provided with an automatic alkali adding device and a salinity adjusting device, the alkali adding amount can be automatically adjusted according to the PH set value of the circulating washing water, so that the content of acidic substances in smoke dust is effectively removed, the washing effect of smoke gas is ensured, automatic water supplement can be performed according to the salinity of the circulating washing water, and scaling caused by overhigh salinity is prevented. This with circulation pretreatment systems, its washing efficiency is high, the cooling is effectual, realizes the automatic control of PH value and salinity in the circulation washing water.
Description
Technical Field
the utility model relates to an environmental protection equipment technical field, more specifically say, relate to a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment.
Background
It is known that the greenhouse effect causes the temperature on the earth to rise and the sea level to rise, and in severe cases, the ecological system balance is damaged, and even the health and the survival of human beings are endangered. Carbon dioxide is the most important factor causing greenhouse effect, and according to statistics, the carbon dioxide discharged to the atmosphere due to the combustion of fossil raw materials is up to 200 hundred million tons every year in the world, while the carbon dioxide discharged by fossil fuel power plants accounts for 30 percent of the total carbon dioxide discharge. The carbon dioxide in the flue gas is captured timely and efficiently, and the greenhouse effect is greatly relieved.
The carbon dioxide trapping process in the coal-fired power plant has strict requirements on flue gas indexes entering a trapping and absorbing system, and if the content of pollutants such as smoke dust, sulfur oxides, nitrogen oxides and the like in the flue gas is too high, the subsequent carbon dioxide trapping efficiency can be reduced, and the energy consumption and the operation cost are increased. Therefore, the flue gas entering the capturing and absorbing system is purified, and the carbon dioxide capturing effect is improved.
The water scrubber is the device that prior art was used for carrying on carbon dioxide entrapment, and inside flue gas got into through the water scrubber bottom, flowed out from the top of the tower after spraying the washing, and in the flue gas after the washing, pollutants such as oxysulfide and nitrogen oxide still can not satisfy the requirement of low reaches carbon entrapment device, therefore the washing effect is not good.
How to improve the flue gas purification effect of a water scrubber is a technical problem which needs to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment can get rid of acidic pollutants such as sulphide in the flue gas effectively, and purification efficiency is high, and purifying effect is good.
The utility model provides a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment, including the scrubbing tower, the inside packing layer body that is used for absorbing carbon dioxide that is equipped with of scrubbing tower, the packing layer body be a plurality of from the lower part of scrubbing tower to the upper portion of scrubbing tower sets gradually a plurality of packing layer bodies;
The automatic alkali adding device is arranged outside the water washing tower and is used for automatically adding alkali into the water washing tower;
The salinity adjusting device is arranged between the water washing tower and the automatic alkali adding device and used for adjusting the salt concentration in the automatic alkali adding device;
The water washing tower also comprises a circulating water cooler arranged on the water circulating external pipeline of the water washing tower;
The water washing tower, the automatic alkali adding device, the salinity adjusting device and the circulating water cooler are communicated in a circulating mode.
Preferably, the packing layer bodies are an upper packing layer body arranged at the upper end inside the water washing tower and a lower packing layer body arranged at the lower end inside the water washing tower.
Preferably, the automatic alkali adding device comprises an alkali adding box and a PH value detection device which is arranged on the pipeline and used for detecting the PH value of the liquid; the automatic alkali adding regulating valve control device is connected with the pH value detection device and is used for adding alkali liquor to the pipeline in front of the pump when the detected pH value of the liquid is lower than a preset pH value.
preferably, the salinity adjusting device comprises a salinity detecting device for detecting the salinity of the liquid, and an automatic water adding adjusting valve control device which is connected with the salinity detecting device and is used for adding water to and diluting the pipeline in front of the pump arranged at the front end of the salinity detecting device when the detected salinity of the liquid exceeds a preset salinity value.
Preferably, the lower packing layer body is a stain-resistant and blocking-resistant lower packing layer body;
The upper packing layer body is particularly an upper packing layer body with large surface area, high heat transfer efficiency and small resistance.
Preferably, the circulating water cooler comprises a temperature measuring part for measuring the temperature of the liquid and a refrigerating part connected with the temperature measuring part.
Preferably, the water outlets of the water washing tower, the salinity adjusting device, the automatic alkali adding device and the circulating water cooler are all provided with filter screens.
Preferably, the washing tower further comprises a demister installed at the upper end of the washing tower.
Preferably, the device further comprises a candle fiber filter arranged at the upper end of the demister.
Compared with the prior art, the utility model provides a pretreatment systems, including the scrubbing tower, locate the inside a plurality of packing layer bodies of scrubbing tower and locate the outside automation of scrubbing tower and add alkali device and salinity adjusting device, wherein, a plurality of packing layer bodies are along the lower part of scrubbing tower to its upper portion cloth, and the scrubbing tower, automatic alkali device and salinity adjusting device three circulation of adding communicate with each other. The pretreatment system adopts a mode of combining a plurality of packing layer bodies, and the flue gas entering from the bottom of the washing tower sequentially passes through the multi-layer packing layer bodies from bottom to top for multiple treatments, SO that the contact time and the contact area of spray water with harmful substances such as smoke dust, SO2 and the like are increased, the harmful substances are fully removed, and the washing efficiency is improved; an automatic alkali adding device is arranged outside the washing tower, and the alkali adding amount can be automatically adjusted according to the pH value of the circulating washing liquid, so that the content of acidic pollutants in the flue gas is effectively reduced, and the washing effect of the flue gas is ensured; in addition, the outside of the water washing tower is also provided with a salinity adjusting device which can automatically supplement water according to the salinity value in the circulating water so as to prevent scaling caused by overhigh salinity.
therefore, the utility model provides a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment, its washing efficiency is high, effectual to can realize the automatic control of PH value and salinity in the circulating water.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cyclic pretreatment system for carbon dioxide capture in a coal-fired power plant according to the present invention.
Wherein, 1 water scrubber, 2 circulating water coolers, 3 salinity adjusting devices, 4 automatic alkali adding devices, 5 lower packing layer bodies, 6 upper packing layer bodies, 7 demisters, 8 candle fiber filters.
Detailed Description
the core of the utility model is to provide a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment, its washing efficiency is high, effectual to can realize the automatic control of pH value and salinity in the circulating water.
It should be noted that the terms "up and down" direction as used herein refer to the up and down direction in fig. 1; "inner" refers to the direction of the interior of the water wash column in FIG. 1, and "outer" refers to the direction of the exterior of the water wash column in FIG. 1. All directional terms used herein are based on the common usage of those skilled in the art and the accompanying drawings of the specification, and their presence should not affect the scope of the present invention.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a cyclic pretreatment system for capturing carbon dioxide in a coal-fired power plant according to the present invention.
The utility model provides a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment, including washing tower 1, washing tower 1's inside is equipped with the packing layer body, and this packing layer body comprises the filler of different specifications. The utility model discloses in, the packing layer body is a plurality of, and a plurality of packing layer bodies set gradually to its upper portion along the lower part of washing tower 1, have realized the washing of flue gas to fully get rid of solid particle in the flue gas, and strengthen the air water heat transfer, reach the purpose that reduces the flue gas temperature.
The outside of scrubbing tower 1 is equipped with automatic alkali device 4 that adds, through the pipeline intercommunication between automatic alkali device 4 that adds and the scrubbing tower 1, automatic alkali device 4 that adds can add the alkali according to the PH setting value of circulating water is automatic, through adding the alkali to washing water circulating system, and the reinforcing gas-liquid mass transfer function through a plurality of packing layer bodies, get rid of acid gaseous pollutant, thereby with PH control in the within range of needs, with the content of acidic material such as SO2, SO3 in the reduction flue gas, improve the washing effect of flue gas. The specific adjusting and controlling process is as follows: the PH value of the circulating washing water is measured by a PH measuring probe AE arranged on an outlet pipeline of the circulating pump, a transmitter AT converts the measured value of the AE into an electric signal form, the electric signal form is sent to a regulator AIC of a control system, an output signal of the AIC control system is fed back to an input end to be compared with a control parameter set value signal, an obtained deviation control signal is returned to an adjusting valve executing mechanism, and the required alkali liquor adding amount is adjusted by the opening degree of a control valve.
In addition, a salinity adjusting device 3 is arranged outside the water washing tower 1, the salinity adjusting device 3 is arranged between the water washing tower 1 and the automatic alkali adding device 4, and is connected with the water washing tower 1 and the automatic alkali adding device 4 through pipelines, so that a circulating system is formed; when the salt concentration in the circulating water is high, the salinity adjusting device 3 can automatically replenish water according to the salinity in the circulating water so as to prevent scaling caused by overhigh salinity. The specific adjusting and controlling process is as follows: the conductivity of the circulating washing water is measured by a conductivity measuring probe AE arranged on an outlet pipeline of the circulating pump, a transmitter AT converts the measured value of the AE into an electric signal form, the electric signal form is sent to a regulator AIC of a control system, an output signal of the AIC control system is fed back to an input end to be compared with a control parameter set value signal, an obtained deviation control signal is returned to an actuating mechanism of an adjusting valve, and the required process water supplement amount is adjusted by controlling the opening degree of the valve.
In order to prevent the capture efficiency of the subsequent carbon dioxide capture process from being influenced by the overhigh temperature of the flue gas, a circulating water cooler 2 for cooling the liquid in the water washing tower 1 can be added on the water circulating external pipeline, the circulating water cooler 2 is arranged between the water washing tower 1 and the salinity adjusting device 3, the water washing tower 1, the automatic alkali adding device 4, the circulating water cooler 2 and the salinity adjusting device 3 are communicated in a circulating mode, and the water body flows out of the water washing tower 1 and then enters the circulating water cooler 2 to circularly cool the high-temperature liquid, so that the temperature of the flue gas is reduced.
Therefore, the flue gas enters the water washing tower 1 from the bottom of the water washing tower 1, is in countercurrent contact with liquid in the tower, and is sequentially subjected to multiple treatments of the multilayer packing layer body to remove solid particles; the washing water in the cooling tower 1 is continuously circulated through a pipeline, and when the washing water is circulated to the salinity adjusting device 3, the salinity adjusting device 3 can automatically replenish water according to the salinity value in the circulating water so as to prevent scaling caused by overhigh salinity; when circulating to automatic alkali adding device 4, automatic alkali adding device 4 can be according to the pH value of circulating water automatic adjustment alkali concentration in the water to get rid of the acidic material in the smoke and dust effectively, guaranteed the water washing effect of flue gas.
Specifically, the plurality of packing layer bodies are an upper packing layer body 6 arranged at the upper end inside the water washing tower 1 and a lower packing layer body 5 arranged at the lower end of the upper packing layer body 6, and after being filtered by two layers of packing, harmful substances such as solid particles and the like in the flue gas are effectively removed; because the solid particles passing through the lower packing layer body 5 have more impurities, the lower packing layer body 5 can adopt antifouling and anti-blocking packing to prevent the solid particles from blocking the packing layer and is convenient to move out and clean; in addition, the upper packing layer body 6 can adopt a packing with large surface area, high heat and mass transfer efficiency and small resistance so as to improve the washing effect, reduce the temperature and remove acid pollutants such as sulfur dioxide and the like.
The automatic alkali adding device 4 comprises an alkali adding box and a pipeline arranged at the front end of the alkali adding box, wherein the alkali adding box is communicated with the pipeline at the front end of the alkali adding box and used for detecting a pH value detection device of a pH value in circulating water, and the automatic alkali adding device further comprises an automatic alkali adding regulating valve control device which is connected with the pH value detection device and used for adding alkali into the alkali adding box, so that when the pH value of circulating spray water detected by the pH value detection device is lower than a preset value, the automatic alkali adding regulating valve control device automatically adds alkali into the alkali adding box to improve the pH value of a water body.
The salinity adjusting device 3 comprises a salinity detecting device for detecting the salinity of the circulating water and an automatic water adding adjusting valve control device connected with the salinity detecting device. When the salinity of the circulating water detected by the salinity detection device 3 exceeds a preset salinity value, the automatic water adding regulating valve control device opens the valve immediately and injects water to the pipeline in front of the pump, so that the salinity value of the circulating spray water is reduced to prevent scaling.
Particularly, circulating water cooler 2's inside is equipped with temperature measurement portion and refrigeration portion, and when the water temperature that temperature measurement portion detected out was higher than the preset temperature value, refrigeration portion will automatically regulated refrigerating output, reduces the temperature degree with the water temperature, and then reduces the temperature of washing back flue gas.
In order to prevent the particulate impurities in the circulating washing water from depositing in each device, a filter screen can be arranged at the water outlet and the water inlet of the water washing tower 1, and/or the salinity adjusting device 3, and/or the automatic alkali adding device 4, and/or the circulating water cooler 2 so as to prevent the impurities from blocking the water washing tower 1.
In order to effectively remove liquid drops carried in the flue gas after water washing and reduce the influence on subsequent devices, a demister 7 can be arranged at the top of the water washing tower 1, and the flue gas after water washing is subjected to demister 7 to remove tiny liquid drops, thereby being beneficial to enhancing the flue gas purification effect.
In order to effectively remove aerosol pollutants such as sulfur trioxide in the water-washed flue gas, a candle fiber filter 8 can be further arranged at the upper end of the demister 7, the flue gas demisted by the demister 7 enters the candle fiber filter 8, the sulfur trioxide aerosol in the flue gas is intercepted, and the flue gas with the temperature, SO2, SO3, solid particles and other pollutants meeting the requirements is obtained.
The demister 7 and the candle filter 8 are prior art and will not be described in detail herein.
it is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The above is to the utility model provides a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment introduces in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (9)
1. A circulating pretreatment system for capturing carbon dioxide in a coal-fired power plant comprises a water washing tower (1), wherein a packing layer body for absorbing carbon dioxide is arranged in the water washing tower (1), and the circulating pretreatment system is characterized in that the packing layer body is a plurality of packing layer bodies which are sequentially arranged from the lower part of the water washing tower (1) to the upper part of the water washing tower (1);
The automatic alkali adding device (4) is arranged outside the water washing tower (1) and is used for automatically adding alkali into the water washing tower (1);
The salinity adjusting device (3) is arranged between the water washing tower (1) and the automatic alkali adding device (4) and is used for adjusting the salt concentration in the automatic alkali adding device (4);
the device also comprises a circulating water cooler (2) arranged on a water circulating external pipeline of the water washing tower (1);
The water washing tower (1), the automatic alkali adding device (4), the salinity adjusting device (3) and the circulating water cooler (2) are communicated in a circulating mode.
2. The cyclic pretreatment system according to claim 1, wherein the plurality of packing layer bodies are embodied as an upper packing layer body (6) disposed at an upper end inside the water washing tower (1) and a lower packing layer body (5) disposed at a lower end inside the water washing tower (1).
3. the cyclic pretreatment system of claim 1, wherein the automatic alkali adding device (4) comprises an alkali adding tank and a PH value detection device arranged in the pipeline and used for detecting the PH value of the liquid; the automatic alkali adding regulating valve control device is connected with the pH value detection device and is used for adding alkali liquor to the pipeline in front of the pump when the detected pH value of the liquid is lower than a preset pH value.
4. The recycling pretreatment system of claim 1, wherein said salinity adjusting means (3) comprises salinity detecting means for detecting the salinity of the liquid, and automatic water-adding adjusting valve control means connected to said salinity detecting means for diluting the water in the pre-pump pipeline provided at the front end of said salinity detecting means when the detected salinity of the liquid exceeds a preset salinity value.
5. The cyclic pretreatment system according to claim 2, characterized in that said lower packing layer body (5) is in particular a fouling resistant and plugging resistant lower packing layer body (5);
the upper packing layer body (6) is specifically an upper packing layer body (6) with large surface area, high heat transfer efficiency and small resistance.
6. The cyclic pretreatment system according to any one of claims 1 to 5, wherein the circulating water cooler (2) includes a temperature measuring part for measuring a temperature of the cooling fluid and a cooling part.
7. the cyclic pretreatment system according to claim 6, wherein the water outlets and inlets of the water scrubber (1), the salinity adjusting device (3), the automatic alkalizing device (4) and the circulating water cooler (2) are provided with filter screens.
8. The cyclic pretreatment system of claim 7, further comprising a demister (7) installed at an upper end of the water washing tower (1).
9. The cyclic pretreatment system of claim 8, further comprising a candle fiber filter (8) mounted at an upper end of the demister (7).
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CN201920293878.7U CN209735313U (en) | 2019-03-07 | 2019-03-07 | a circulation pretreatment systems for coal fired power plant carbon dioxide entrapment |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109745850A (en) * | 2019-03-07 | 2019-05-14 | 广东南方碳捕集与封存产业中心 | A kind of circulation pretreatment system for coal-burning power plant's collecting carbonic anhydride |
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2019
- 2019-03-07 CN CN201920293878.7U patent/CN209735313U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109745850A (en) * | 2019-03-07 | 2019-05-14 | 广东南方碳捕集与封存产业中心 | A kind of circulation pretreatment system for coal-burning power plant's collecting carbonic anhydride |
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