Carbon dioxide capture and ultra-clean dust removal co-processing system and carbon dioxide capture and ultra-clean dust removal co-processing method

Abstract

The invention provides a carbon dioxide capture and ultra-clean dust removal cooperative treatment system and method. The carbon dioxide capture and ultra-clean dust removal co-processing system comprises a flue gas cooler, a flue gas demister, an ultra-clean dust remover and a carbon dioxide capture device, a flue gas inlet of the flue gas cooler is connected with a flue gas pipeline, and a flue gas outlet of the flue gas cooler is connected with a flue gas inlet of the ultra-clean dust remover; the smoke cooler is connected with the air heater through a circulating water pipe, circulating water in the circulating water pipe can circularly flow between the smoke cooler and the air heater, a circulating water pump is arranged on the circulating water pipe, a smoke outlet of the ultra-clean dust remover is connected with the carbon dioxide catcher, and the carbon dioxide catcher can absorb and analyze carbon dioxide. According to the invention, high-efficiency capture of carbon dioxide is realized, and ultra-clean dust emission of flue gas is realized at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide capture, and in particular to a system and method for coordinated processing of carbon dioxide capture and ultra-clean dust removal. Background Art

[0002] Carbon dioxide is one of the main components of greenhouse gases that cause global warming. How to capture and reuse the emitted carbon dioxide is an important research direction in the field of flue gas purification. At present, the more mature carbon dioxide capture process is the alcohol amine solution absorption method, which uses alcohol amine solution as an absorbent. The treated flue gas passes through the absorbent in the absorption tower and the desorption tower for chemical absorption and desorption reaction, thereby obtaining high-purity carbon dioxide gas.

[0003] Although the above-mentioned carbon dioxide capture process can efficiently capture carbon dioxide in flue gas, it still has the following defects: 1) The absorbent solution contains more water, and the absorbent regeneration reaction temperature is relatively high. During the absorbent regeneration process, additional heat is required to heat the water, resulting in a lot of ineffective energy consumption, and the operating cost is still at a high level; 2) In order to achieve a better absorption effect, the circulation volume of the absorbent is huge, so it is necessary to build a taller and larger absorption tower, which requires higher site requirements and cost consumption.

[0004] In addition, as a major carbon dioxide emitter, the current smoke dust emission concentration requirement for thermal power units is 5-10mg / Nm 3 Below, based on the bottleneck of wet flue gas desulfurization coordinated dust removal or wet electrostatic precipitator dust removal technology, it is difficult to continue to significantly reduce its dust emission concentration by applying similar technologies.

[0005] Therefore, developing a carbon dioxide capture system with a simple structure and low operating cost and significantly reducing the dust emission concentration of thermal power units are technical problems that need to be solved urgently. Summary of the invention

[0006] The object of the present invention is to provide a system and method for coordinated processing of carbon dioxide capture and ultra-clean dust removal, which can realize ultra-clean dust emission of flue gas while realizing efficient capture of carbon dioxide.

[0007] The present invention provides a carbon dioxide capture and ultra-clean dust removal coordinated processing system, comprising a flue gas cooler, a flue gas demister, an ultra-clean dust collector and a carbon dioxide collector, wherein the smoke inlet of the flue gas cooler is connected to a flue gas pipeline, the smoke outlet of the flue gas cooler is connected to the smoke inlet of the ultra-clean dust collector, the flue gas cooler is connected to a heater through a circulating water pipe, the circulating water in the circulating water pipe can circulate between the flue gas cooler and the heater, a circulating water pump is provided on the circulating water pipe, the smoke outlet of the ultra-clean dust collector is connected to the carbon dioxide collector, and the carbon dioxide collector can absorb and analyze carbon dioxide.

[0008] Furthermore, a smoke booster fan is provided on the smoke duct, and a smoke outlet of the smoke booster fan is connected to a smoke inlet of the smoke cooler.

[0009] Furthermore, the ultra-clean dust collector includes a box body, and a W-shaped dust removal module is arranged inside the box body, and the dust removal module is provided with a sintered plate made of PE material.

[0010] Furthermore, the ultra-clean dust collector also includes a purge module and an air control module. When the air control module detects that the resistance of the flue gas flowing through the dust removal module reaches a set value, the purge module is turned on to purge the dust removal module.

[0011] Furthermore, the carbon dioxide collector includes a cylindrical shell, the interior of the cylindrical shell is divided into an absorption zone and a decomposition zone, a driving shaft is provided at the center of the cylindrical shell, and an absorbent module is provided inside the cylindrical shell. The driving shaft can drive the absorbent module to move alternately between the absorption zone and the decomposition zone, and the absorbent module absorbs and decomposes carbon dioxide in the absorption zone and the decomposition zone respectively.

[0012] Furthermore, an electromagnetic wave heater for heating the absorbent module is provided in the analysis area.

[0013] The present invention also provides a method for coordinated processing of carbon dioxide capture and ultra-clean dust removal, and the flue gas is processed by using the above-mentioned coordinated processing system of carbon dioxide capture and ultra-clean dust removal.

[0014] Furthermore, the treatment includes: the flue gas enters the flue gas cooler, the flue gas demister, the ultra-clean dust collector and the carbon dioxide collector in sequence for flue gas cooling, flue gas dehumidification, flue gas dust removal and flue gas decarbonization. The flue gas heat during the flue gas cooling process is transferred to the air of the heater through circulating water, and the carbon dioxide absorbed during the flue gas decarbonization process is analyzed in the carbon dioxide collector and then recovered.

[0015] Furthermore, the decomposition temperature of carbon dioxide is ≤90°C.

[0016] Furthermore, the dust concentration in the treated flue gas is less than 0.1mg / Nm 3 .

[0017] The implementation of the present invention has at least the following advantages:

[0018] 1. The present invention further recovers the sensible heat of the flue gas and part of the latent heat of the water vapor by arranging the flue gas cooler and the air heater, and uses the recovered heat to preheat the air required by the boiler, thereby further reducing the heat consumption of the boiler system and improving the thermal efficiency of the entire boiler system.

[0019] 2. The present invention greatly reduces the moisture in the flue gas by providing a flue gas demister, thus creating better conditions for subsequent ultra-clean dust removal and carbon dioxide capture.

[0020] 3. The ultra-clean dust collector of the present invention adopts PE sintered plate dust removal technology, which can be applied to flue gas conditions containing water vapor and low-temperature corrosion, solving the problems of low-temperature corrosion of electrostatic precipitator and moisture sticking of bag filter.

[0021] 4. The carbon dioxide collector of the present invention is provided with an absorbent module, the absorption temperature of the absorbent is room temperature, and the absorption rate is fast; the decomposition temperature of the absorbent is below 90°C, the decomposition energy consumption is greatly reduced, and the regeneration energy consumption is ≤2.0GJ / ton CO2; in addition, heating is used for carbon dioxide decomposition, the decomposition method is simple, and the heating speed is fast.

[0022] 5. The carbon dioxide collector of the present invention adopts a rotary structure, and the absorbent module works alternately between the absorption zone and the decomposition zone, thereby realizing a seamless connection between the carbon dioxide absorption and decomposition processes; in addition, the absorption and decomposition processes are carried out simultaneously in the same carbon dioxide collector, thereby improving the operating efficiency of the carbon dioxide collector.

[0023] 6. The moisture content of the flue gas treated by the present invention is greatly reduced, the dust removal efficiency is 99%, and the carbon dioxide capture rate is 98%. While achieving high carbon dioxide capture efficiency, it can also achieve efficient removal of flue gas particulate matter. The dust concentration in the treated flue gas is <0.1mg / Nm 3 , achieving near-zero emissions of flue gas particulate matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the carbon dioxide capture and ultra-clean dust removal coordinated processing system;

[0026] Figure 2 This is a top view of the carbon dioxide capture device;

[0027] Figure 3 This is the front view of the carbon dioxide capture device.

[0028] Description of reference numerals:

[0029] 1: Flue gas cooler; 2: Flue gas demister; 3: Ultra-clean dust collector; 4: Carbon dioxide collector; 5: Heater; 6: Circulating water pump; 7: Flue gas booster fan; 8: Gas induced draft fan; 9: Outer wall; 10: Inner wall; 11: Absorption zone module; 12: Desorption zone module; 13: Upper frame; 14: Sealing sheet; 15: Module positive electrode brush; 16: Module negative electrode brush; 17: Module support beam; 18: Driving shaft; 19: Power supply; 20: Raw flue gas inlet duct; 21: Clean flue gas outlet duct; 22: Desorption gas outlet duct; 23, 24: Pressure measuring points. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form also includes the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this description, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] Combination Figures 1 to 3 As shown, the carbon dioxide capture and ultra-clean dust removal coordinated processing system of this embodiment includes a flue gas cooler 1, a flue gas demister 2, an ultra-clean dust collector 3 and a carbon dioxide collector 4. The smoke inlet of the flue gas cooler 1 is connected to the flue gas duct, and the smoke outlet of the flue gas cooler 1 is connected to the smoke inlet of the ultra-clean dust collector 3. The flue gas cooler 1 is connected to the heater 5 through a circulating water pipe. The circulating water in the circulating water pipe can circulate between the flue gas cooler 1 and the heater 5. A circulating water pump 6 is provided on the circulating water pipe. The smoke outlet of the ultra-clean dust collector 3 is connected to the carbon dioxide collector 4, and the carbon dioxide collector 4 can absorb and analyze carbon dioxide.

[0035] The carbon dioxide capture and ultra-clean dust removal coordinated processing system of this embodiment can be applied to the flue gas after wet desulfurization of coal-fired units, and can also be applied to the tail flue gas of the waste heat boiler of the gas turbine unit. When the original flue gas pressure is insufficient, a flue gas booster fan 7 can be installed on the flue gas pipeline to increase the flue gas pressure. The smoke inlet of the flue gas booster fan 7 is connected to the wet desulfurization tower or the wet electrostatic precipitator outlet flue, and the smoke outlet of the flue gas booster fan 7 is connected to the smoke inlet of the flue gas cooler 1.

[0036] The flue gas cooler 1 is mainly used to cool the flue gas. The flue gas cooler 1 is connected to the heater 5 through a circulating water pipe; specifically, the water inlet of the flue gas cooler 1 is connected to the outlet of the circulating water pump 6, the water outlet of the flue gas cooler 1 is connected to the water inlet of the heater 5 through the circulating water pipe, the water outlet of the heater 5 is connected to the inlet of the circulating water pump 6 through the circulating water pipe, the air inlet of the heater 5 is connected to the cold air inlet pipe, and the air outlet of the heater 5 is connected to the hot air outlet pipe. The circulation flow resistance of the circulating water in the circulating water pipe between the flue gas cooler 1 and the heater 5 is overcome by the circulating water pump 6, and the heat on the flue gas side of the flue gas cooler 1 is transferred to the air flowing through the heater 5 through the circulating water. By setting the flue gas cooler 1 and the heater 5, the sensible heat of the flue gas and the latent heat of part of the water vapor are further recovered, and the recovered heat is used to preheat the air required by the boiler, which can reduce the heat consumption of the boiler system and improve the thermal efficiency of the entire boiler system.

[0037] The flue gas demister 2 is mainly used to remove water from the flue gas. A multi-stage flue gas demister 2 can be arranged in the flue gas outlet flue of the flue gas cooler 1 to remove condensed water generated during the cooling process of the flue gas. A condensed water discharge pipe is arranged at the bottom of the flue, and a water seal is arranged at the condensed water discharge pipe to prevent flue gas leakage. By arranging the flue gas demister 2, the moisture in the flue gas is greatly reduced, creating better conditions for subsequent ultra-clean dust removal and carbon dioxide capture.

[0038] The ultra-clean dust collector 3 is mainly used for dust removal of flue gas. The ultra-clean dust collector 3 includes a box body, inside which a W-shaped dust removal module is provided, and the dust removal module is provided with a sintered plate made of PE material. In addition, the ultra-clean dust collector 3 also includes a purge module and an air control module. When the air control module detects that the resistance of the flue gas flowing through the dust removal module reaches a set value, the purge module is turned on to purge the dust removal module; an ash hopper is provided under the box body, and the purged particles fall off from the outer wall of the dust removal module and settle to the outside of the ash hopper for discharge. The ultra-clean dust collector 3 adopts PE sintered plate dust removal technology, which can be used for flue gas conditions containing water vapor and low-temperature corrosion, solving the problems of low-temperature corrosion of electrostatic precipitators and moisture sticking to bags of bag dust collectors; in addition, the use of a W-shaped dust removal module is conducive to increasing its dust removal area.

[0039] like Figure 2 , Figure 3As shown, the carbon dioxide collector 4 adopts a rotary structure, including a cylindrical shell with a circular cross-section. The entire circular cross-section of the cylindrical shell is divided into multiple absorbent modules along the radial and circumferential directions. Each absorbent module consists of a box body and a solid absorbent filled therein. The box body is surrounded by an outer wall 9, an inner wall 10 and a side wall. The solid absorbent can adopt PCS-OH solid adsorbent. The upper and lower ends of the absorbent module are respectively connected to the positive and negative electrodes of the power supply 19 through a module positive electrode brush 15 and a module negative electrode brush 16. The absorbent module can analyze the absorbed carbon dioxide gas when the power supply 19 is turned on. All absorbent modules are installed in a circular rotary support frame. The absorbent modules within the larger circumferential angle range of the entire circular cross-section constitute a carbon dioxide absorption zone. At this time, the absorbent modules in the carbon dioxide absorption zone are the absorption zone modules 11, and the absorbent modules within the remaining smaller circumferential angle ranges constitute a carbon dioxide analysis zone. At this time, the absorbent modules in the carbon dioxide analysis zone are the analysis zone modules 12. An upper frame 13 and a module support beam 17 are provided above and below the absorbent module, respectively. A sealing sheet 14 is provided under the frame beam of the upper frame 13 that separates the absorption zone and the decomposition zone. The sealing sheet 14 is tightly fitted to the upper part of the absorbent module to prevent the gases in the absorption zone and the decomposition zone from being mixed. The original flue gas inlet flue 20 and the clean flue gas outlet flue 21 are connected to the absorption zone module 11. The original flue gas inlet flue 20 is connected to the upper part of the absorption zone, the clean flue gas outlet flue 21 is connected to the lower part of the absorption zone, and the lower part of the decomposition zone is connected to the decomposition gas outlet flue 22. The decomposition gas outlet flue 22 is equipped with a gas induced draft fan 8 for conveying the carbon dioxide gas after decomposition.

[0040] A driving shaft 18 is provided at the center of the cylindrical shell, and the carbon dioxide collector 4 is driven to rotate by the central shaft. During the rotation process, the carbon dioxide absorption zone and the carbon dioxide decomposition zone are continuously cycled and alternated, and the absorption and decomposition processes of carbon dioxide are alternately and continuously performed during the rotation process of the carbon dioxide collector 4, thereby realizing the separation and capture of carbon dioxide gas in the flue gas. The absorption temperature of the carbon dioxide collector 4 is 20-40°C, and the absorption rate is fast; an electromagnetic wave heater for heating the absorbent module is provided in the decomposition zone, and the decomposition temperature of the absorbent is below 90°C, and the decomposition energy consumption is greatly reduced, and the regeneration energy consumption is ≤2.0GJ / ton CO2. The carbon dioxide is decomposed by heating, and the decomposition method is simple. After the power supply 19 is turned on, it can be quickly decomposed, and the decomposition speed is much higher than the absorption speed. The volume of the absorption zone is larger than the volume of the decomposition zone, which is conducive to reducing the volume of the carbon dioxide collector 4.

[0041] In addition, the diameter of the carbon dioxide collector 4 and the height of the absorbent module can be designed and adjusted according to the amount of flue gas to be processed and the efficiency of carbon dioxide gas capture. The installation circular angle distribution between the absorption zone module 11 and the desorption zone module 12 can be determined according to the conditions of the design capture efficiency of gases with different carbon dioxide concentrations and the ratio of the absorption and desorption rates. The circular angle corresponding to the area where each absorbent module is located and the rotation direction of the entire device can be adjusted according to design requirements. The above-mentioned carbon dioxide collector 4 adopts a rotary structure, and the absorbent module works alternately between the absorption zone and the desorption zone, realizing seamless connection between the carbon dioxide absorption and desorption processes; and, the absorption and desorption processes are carried out simultaneously in the same carbon dioxide collector 4, which improves the operating efficiency of the carbon dioxide collector 4.

[0042] The carbon dioxide capture and ultra-clean dust removal coordinated processing system of this embodiment further recovers the sensible heat of the flue gas and part of the latent heat of water vapor by arranging a flue gas cooler 1 and a heater, and uses the recovered heat to preheat the air required by the boiler, thereby further reducing the heat consumption of the boiler system and improving the thermal efficiency of the entire boiler system; by arranging the flue gas demister 2, the moisture in the flue gas is greatly reduced, creating better conditions for subsequent ultra-clean dust removal and carbon dioxide capture; by arranging the ultra-clean dust collector 3, the problems of low-temperature corrosion of the electrostatic precipitator and moisture sticking to the bag filter of the bag filter are solved; by arranging the carbon dioxide collector 4, the carbon dioxide absorption rate is increased, the analysis energy consumption is greatly reduced, and the ultra-clean dust emission of the flue gas is achieved while achieving efficient carbon dioxide capture.

[0043] Example 2

[0044] The carbon dioxide capture and ultra-clean dust removal coordinated processing method of this embodiment adopts the carbon dioxide capture and ultra-clean dust removal coordinated processing system of Example 1 to process the flue gas, and the processing includes: the flue gas enters the flue gas cooler 1, the flue gas demister 2, the ultra-clean dust collector 3 and the carbon dioxide collector 4 in sequence for flue gas cooling, flue gas dehumidification, flue gas dust removal and flue gas decarbonization, the flue gas heat in the flue gas cooling process is transferred to the air of the heater 5 through circulating water, the carbon dioxide absorbed in the flue gas decarbonization process is analyzed in the carbon dioxide collector 4 and then recovered, and the analysis temperature of the carbon dioxide is ≤90°C.

[0045] The dust-containing gas at the outlet of the wet desulfurization tower or the wet electrostatic precipitator is pressurized by the flue gas booster fan 7 and then enters the flue gas cooler 1 through the flue for cooling. The flue gas cooled by the flue gas cooler 1 is discharged through the flue gas side outlet of the flue gas cooler 1. During the cooling process of the flue gas in the flue gas cooler 1, the sensible heat of the flue gas and the sensible heat generated by the condensation of water vapor will be released. The cold water at the water side inlet of the flue gas cooler 1 absorbs the heat released by the flue gas and then heats up. The heated hot water is discharged through the water side outlet of the flue gas cooler 1 and is led to the water side inlet of the heater 5 through a pipeline. The hot water entering the heater 5 heats the air at the air side inlet of the heater 5 and then cools down. The cooled cold water is discharged from the water side outlet of the heater 5. The cold water is led to the inlet of the circulating water pump 6 through a pipeline, and is discharged from the outlet of the circulating water pump 6 after being pressurized by the circulating water pump 6. Finally, it is led to the water side inlet of the flue gas cooler 1 through a pipeline to cool the flue gas and complete the circulation on the water side. The air heated by the heater 5 enters the subsequent equipment through the air side outlet of the heater 5.

[0046] The flue gas discharged from the flue gas cooler 1 enters the inlet of the flue gas demister 2 through the flue duct. Since the flue gas is cooled, some condensed water will be generated. When the flue gas flows through the flue gas demister 2, a large amount of condensed water is separated. The separated condensed water is discharged from the drain port of the flue gas demister 2. The flue gas from which the condensed water has been removed enters the ultra-clean dust collector 3 from the outlet flue of the flue gas demister 2.

[0047] The flue gas entering the ultra-clean dust collector 3 flows from the outside to the inside in the PE sintering plate dust removal module. During the flow, particulate matter is trapped on the outside of the W-shaped dust removal module. As the dust removal process continues, the particulate matter trapped on the outer wall of the sintering plate continues to increase, the thickness of the particulate matter continues to increase, and the resistance of the flue gas flowing through the dust removal module continues to increase. When the resistance reaches the set value, the nitrogen purge valve of the air control module is opened to purge the dust removal module, and the particulate matter trapped on the outer wall of the dust removal module falls off and settles to the outside of the ash hopper for discharge. The clean flue gas enters the carbon dioxide collector 4 through the outlet of the ultra-clean dust collector 3.

[0048] The flue gas after dust removal enters the upper part of the absorption zone module 11 from the original flue gas inlet flue 20. The flue gas is evenly distributed in the upper space of the entire absorption zone. The flue gas flows through the absorption zone module 11 from top to bottom. During the flow, the carbon dioxide gas in the flue gas is continuously absorbed by the solid absorbent in the absorption zone module 11. The height design of the absorption zone module 11 meets the requirements of flue gas carbon dioxide capture efficiency. The clean flue gas flowing out of the absorption zone module 11 is discharged to the chimney through the clean flue gas outlet flue 21. With the continuous rotation of the carbon dioxide collector 4, each absorbent module will enter the absorption zone from the decomposition zone, and continuously absorb the carbon dioxide gas in the flue gas in the absorption zone. When the absorbent module re-enters the decomposition zone, the solid absorbent has basically reached saturation in the absorption of carbon dioxide gas, and the absorption zone module 11 has completed the entire absorption process. When the absorbent module enters the decomposition zone from the absorption zone, the absorbent module is connected to the external power supply 19 through the module positive brush 15 and the module negative brush 16. The solid absorbent in the absorbent module heats up rapidly under the heating condition of the external power supply 19. As the temperature rises, the absorbed carbon dioxide gas is continuously decomposed. The decomposed carbon dioxide gas flows from top to bottom to the decomposition gas outlet flue 22, and is finally transported to the carbon dioxide gas storage system by the gas induced draft fan 8. As the carbon dioxide collector 4 continues to rotate, each absorbent module will enter the decomposition zone from the absorption zone, and the carbon dioxide gas in the solid absorbent will be continuously decomposed in the decomposition zone. When the absorbent module re-enters the absorption zone, the solid absorbent has basically reached the initial state before absorbing carbon dioxide gas, and the decomposition zone module 12 has completed the entire decomposition process.

[0049] During the actual operation, in order to avoid gas cross-talk between the absorption zone module 11 and the decomposition zone module 12, pressure measuring points 23 are set in the upper and lower spaces of the absorption zone module 11, and pressure measuring points 24 are also set in the upper and lower spaces of the decomposition zone module 12. The gas induced draft fan 8 adopts a variable frequency speed regulating fan, and the speed of the fan is adjusted according to the pressure average of the upper and lower spaces of the decomposition zone module 12, so that the pressure average of the upper and lower spaces of the decomposition zone module 12 is slightly higher than the pressure average of the upper and lower spaces of the absorption zone module 11, so as to reduce the cross-talk between the absorption zone module 11 and the decomposition zone module 12, and ensure that the flue gas in the absorption zone module 11 does not enter the decomposition zone module 12.

[0050] Taking the coal-fired unit as an example, the carbon dioxide capture and ultra-clean dust removal coordinated treatment system is arranged in front of the chimney, and the inlet flue gas parameters are shown in Table 1.

[0051] Table 1 Inlet flue gas parameters

[0052]

[0053] The flue gas parameters after the flue gas is treated by the coordinated treatment method of carbon dioxide capture and ultra-clean dust removal of this embodiment are shown in Table 2.

[0054] Table 2 Flue gas parameters after treatment

[0055]

[0056] According to Tables 1 and 2, it can be seen that the moisture content of the flue gas treated by the coordinated treatment method of carbon dioxide capture and ultra-clean dust removal in this embodiment is greatly reduced, the dust removal efficiency is 99%, the carbon dioxide capture rate is 98%, the absorbent regeneration operating temperature is ≤90°C, and the regeneration energy consumption is ≤2.0GJ / ton CO2. This shows that the method of this embodiment can achieve high carbon dioxide capture efficiency while achieving efficient removal of flue gas particulate matter and achieving near-zero emissions of flue gas particulate matter.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A carbon dioxide capture and ultra-clean dust removal coordinated processing system, characterized in that: It includes a flue gas cooler, a flue gas demister, an ultra-clean dust collector and a carbon dioxide collector. The smoke inlet of the flue gas cooler is connected to the flue gas duct, the smoke outlet of the flue gas cooler is connected to the smoke inlet of the ultra-clean dust collector, the flue gas cooler is connected to the heater through a circulating water pipe, the circulating water in the circulating water pipe can circulate between the flue gas cooler and the heater, a circulating water pump is provided on the circulating water pipe, the smoke outlet of the ultra-clean dust collector is connected to the carbon dioxide collector, and the carbon dioxide collector can absorb and analyze carbon dioxide.

2. The carbon dioxide capture and ultra-clean dust removal coordinated processing system according to claim 1 is characterized in that: A smoke booster fan is arranged on the smoke duct, and a smoke outlet of the smoke booster fan is connected to a smoke inlet of the smoke cooler.

3. The carbon dioxide capture and ultra-clean dust removal coordinated processing system according to claim 1 is characterized in that: The ultra-clean dust collector comprises a box body, inside which a W-shaped dust removal module is arranged, and the dust removal module is provided with a sintered plate made of PE material.

4. The carbon dioxide capture and ultra-clean dust removal coordinated processing system according to claim 3 is characterized in that: The ultra-clean dust collector also includes a purge module and an air control module. When the air control module detects that the resistance of the flue gas flowing through the dust removal module reaches a set value, the purge module is turned on to purge the dust removal module.

5. The carbon dioxide capture and ultra-clean dust removal coordinated processing system according to claim 1 is characterized in that: The carbon dioxide collector includes a cylindrical shell, the interior of which is divided into an absorption zone and a decomposition zone. A driving shaft is provided at the center of the cylindrical shell, and an absorbent module is provided inside the cylindrical shell. The driving shaft can drive the absorbent module to move alternately between the absorption zone and the decomposition zone. The absorbent module absorbs and decomposes carbon dioxide in the absorption zone and the decomposition zone respectively.

6. The carbon dioxide capture and ultra-clean dust removal coordinated processing system according to claim 5 is characterized in that: An electromagnetic wave heater for heating the absorbent module is provided in the decomposition zone.

7. A method for synergistically processing carbon dioxide capture and ultra-clean dust removal, characterized in that: The flue gas is treated by using the carbon dioxide capture and ultra-clean dust removal coordinated processing system described in any one of claims 1 to 6.

8. The method for coordinated treatment of carbon dioxide capture and ultra-clean dust removal according to claim 7, characterized in that: Processing includes: The flue gas enters the flue gas cooler, flue gas demister, ultra-clean dust collector and carbon dioxide collector in sequence for flue gas cooling, flue gas moisture removal, flue gas dust removal and flue gas decarbonization. The flue gas heat during the flue gas cooling process is transferred to the air of the heater through circulating water, and the carbon dioxide absorbed during the flue gas decarbonization process is analyzed and recovered in the carbon dioxide collector.

9. The method for coordinated treatment of carbon dioxide capture and ultra-clean dust removal according to claim 8, characterized in that: The decomposition temperature of carbon dioxide is ≤90℃.

10. The method for coordinated treatment of carbon dioxide capture and ultra-clean dust removal according to claim 7, characterized in that: The dust concentration in the flue gas after treatment is <0.1mg / Nm 3 .

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