Flue gas adsorption and desorption system

Abstract

The utility model discloses a flue gas adsorption and desorption system, and belongs to the technical field of flue gas adsorption and purification. According to the utility model, the plurality of adsorption modules are used for adsorbing flue gas, so that the flue gas is dispersed and adsorbed, the resistance measuring mechanism is used for measuring the resistance in each adsorption bed of the adsorption modules, and the flue gas uniformly enters each adsorption bed through the resistance balancing mechanism for changing the resistance in the adsorption bed according to the measured value of the resistance measuring mechanism; flue gas is prevented from being gathered in a single adsorption bed, the flue gas is uniformly distributed in the adsorption module in the adsorption and purification process, the flue gas is uniformly contacted with an adsorbent, the adsorption module is subjected to desorption and pressure reduction cooling through the desorption module, the temperature of the adsorption bed is quickly and effectively reduced, the operation efficiency of the adsorption module is improved, and the energy consumption is reduced. The problems that current flue gas adsorption is incomplete, the purification effect is not ideal, and the adsorbent utilization rate is not high are solved.

Description

Technical Field

[0001] This utility model relates to a flue gas adsorption and desorption system, belonging to the field of flue gas adsorption and purification technology. Background Technology

[0002] Adsorption-desorption is a common purification method for removing pollutants from halogen-containing flue gas. It can also be used to purify pollutants from non-halogen-containing flue gas. During the adsorption purification process, flue gas enters the adsorption tower through the flue gas inlet. The diffusion rate of low-temperature flue gas is low, and the flow of low-temperature flue gas in the adsorption tower is uncontrolled. When the flue gas passes through the adsorption bed, it is difficult for the flue gas to come into uniform contact with the adsorbent, resulting in a significantly higher amount of flue gas passing through some areas of the adsorption bed. This leads to inconsistent flue gas purification levels and affects the flue gas adsorption effect.

[0003] To ensure uniform flue gas distribution, a uniform air distribution device is typically installed at the flue gas inlet of the adsorption tower. However, since the adsorption bed is composed of adsorbent of a certain thickness, the flow direction of the flue gas within the adsorption bed cannot be controlled after it enters. Consequently, there are still significant differences in the amount of flue gas passing through different areas of the adsorption bed, leading to inconsistent flue gas purification levels and varying adsorption saturation levels in different areas. This affects the flue gas adsorption effect and the utilization rate of the adsorbent. These problems are particularly pronounced for large-diameter adsorption beds due to their large adsorption cross-section. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a flue gas adsorption-desorption system that ensures that the flue gas is evenly distributed in the adsorption module during the adsorption and purification process, and that the flue gas and adsorbent are in uniform contact. This solves the problems of incomplete flue gas adsorption, unsatisfactory purification effect, and low adsorbent utilization rate in the current system.

[0005] To achieve the above objectives / to solve the above technical problems, this utility model adopts the following technical solution:

[0006] A flue gas adsorption-desorption system includes multiple adsorption modules for adsorbing flue gas, a flue gas discharge main pipe for discharging flue gas into each adsorption module, a steam main pipe for discharging desorption steam into each adsorption module, a flue gas discharge main pipe for discharging the purified flue gas from each adsorption module, and a desorption module for desorbing, purifying, reducing pressure, and cooling the adsorption modules.

[0007] The adsorption module includes multiple adsorption beds and multiple resistance balancing devices corresponding to the adsorption beds;

[0008] The adsorption bed has a flue gas inlet at one end and a flue gas outlet at the other end;

[0009] The flue gas inlet is connected to a first guide pipe, one end of which is equipped with a first valve and the other end with a second valve; the first valve is connected to the main flue gas discharge pipe and the second valve is connected to the desorption module.

[0010] The flue gas outlet is connected to a second guide pipe, one end of which is equipped with a third valve and the other end with a fourth valve; the third valve is connected to the main steam pipeline and the fourth valve is connected to the main flue gas discharge pipeline.

[0011] The resistance balancing device includes a resistance measuring mechanism for measuring the resistance of the adsorption bed and a resistance balancing mechanism for changing the internal resistance of the adsorption bed to make the flue gas evenly distributed in each adsorption bed.

[0012] Optionally, the desorption module includes a third guide pipe, multiple heat exchanger groups connected in series, a first branch pipe for discharging steam into the heat exchanger groups for cooling, a second branch pipe for discharging water accumulated in the adsorption bed into the heat exchanger groups for cooling, a liquid separation mechanism, and a pressure reduction circuit.

[0013] One end of the third guide pipe is connected to the second valve, and the other end is connected to the first branch pipe and the second branch pipe respectively;

[0014] The heat exchanger assembly is connected to the liquid distribution mechanism and the pressure reduction circuit, respectively.

[0015] Optionally, the heat exchanger group includes a first heat exchanger and a second heat exchanger; the outlet end of the first heat exchanger is provided with a connecting pipe, one end of which is connected to the outlet end of the first heat exchanger and the other end of which is connected to the inlet end of the second heat exchanger.

[0016] Optionally, the first branch pipe is connected to the third guide pipe at one end with a first control valve, and the other end is connected to the inlet end of the first heat exchanger.

[0017] Optionally, a second control valve and a diaphragm pump are sequentially provided at one end of the second branch pipe connected to the third guide pipe, and the diaphragm pump is connected to the inlet end of the second heat exchanger.

[0018] Optionally, the pressure reduction circuit includes a third branch pipe, a third control valve located at one end of the third branch pipe, a water ring vacuum pump located at the other end of the third branch pipe, a water tank, a fourth branch pipe, a fourth control valve located at one end of the fourth branch pipe, and a fifth control valve located on the connecting pipe.

[0019] One end of the third branch pipe is connected to the connecting pipe via a third control valve, and the other end of the third branch pipe is connected to the water tank via a water ring vacuum pump;

[0020] One end of the fourth branch pipe is connected to the water tank via the fourth control valve, and the other end of the fourth branch pipe is connected to the connecting pipe.

[0021] Optionally, the liquid separation mechanism includes a layering tank and a storage tank;

[0022] The stratification tank is provided with an overflow outlet; the overflow outlet is connected to the storage tank, and after the liquid substances in the stratification tank are stratified into liquid layers, the liquid substances with a density less than that of water enter the storage tank through the overflow outlet.

[0023] The liquid storage tank is equipped with a drain port, and the drain port is equipped with a drain pump.

[0024] Optionally, the tiered trough is also provided with a drain pipe and an air outlet;

[0025] Water and substances with a density greater than water in the stratification tank are discharged from the stratification tank through the drain pipe;

[0026] The air outlet is connected to a fan, and the non-condensable gas in the stratified tank is discharged from the air outlet through the fan into the stratified tank.

[0027] Optionally, the resistance balancing mechanism includes a controller, a spray valve, and a spray port disposed in the adsorption bed;

[0028] The controller is electrically connected to the spray valve and the resistance measuring mechanism, respectively;

[0029] The inlet end of the spray valve is connected to the external water supply pipeline, and the outlet end is connected to the spray nozzle.

[0030] Optionally, the resistance measuring mechanism is a resistance detection sensor, model MPM430.

[0031] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0032] 1. This utility model employs multiple adsorption modules to adsorb flue gas, resulting in dispersed adsorption. Furthermore, a resistance measuring mechanism measures the resistance within each adsorption bed of the adsorption module. By adjusting the resistance balance mechanism based on the measured values, the flue gas is uniformly introduced into each adsorption bed, preventing accumulation in any single bed. This ensures even distribution of the flue gas within the adsorption module during the adsorption purification process, resulting in uniform contact between the flue gas and the adsorbent. Additionally, a desorption module desorbs and depressurizes the adsorption module, rapidly and effectively reducing the temperature of the adsorption bed and improving the operating efficiency of the adsorption module. This solves the current problems of incomplete flue gas adsorption, unsatisfactory purification effects, and low adsorbent utilization.

[0033] 2. In this invention, after the adsorption bed is heated and desorbed by steam, a water ring vacuum pump in a pressure-reducing circuit is used to reduce the pressure of the internal components of the adsorption bed. The water in the adsorption bed evaporates after the pressure is reduced and takes away the heat, so that the adsorption bed cools down rapidly.

[0034] 3. The resistance balancing mechanism in this utility model can change the resistance by spraying water into the adsorption bed through the spray nozzle, and can also use the sprayed water to cool the adsorption bed. In conjunction with the pressure reduction circuit, the cooling effect of the adsorption bed can be further improved. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of a flue gas adsorption-desorption system according to an embodiment of this utility model;

[0036] Figure 2 This is a schematic diagram of an adsorption module in a flue gas adsorption-desorption system according to an embodiment of this utility model;

[0037] Figure 3 This is a schematic diagram of a desorption module in a flue gas adsorption-desorption system according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of an adsorption bed in a flue gas adsorption-desorption system according to an embodiment of this utility model;

[0039] Figure 5 This is a schematic diagram of the structure of the layered tank, liquid storage tank and water tank in a flue gas adsorption-desorption system according to an embodiment of this utility model;

[0040] Figure 6 This is a schematic diagram of the partial structural distribution of a flue gas adsorption-desorption system according to an embodiment of the utility model (showing the adsorption module, fan, diaphragm pump, liquid storage tank and heat exchanger group).

[0041] In the diagram: 1. Adsorption module; 101. Adsorption bed; 102. Resistance balancing device; 1021. Resistance measuring mechanism; 1022. Resistance balancing mechanism; 10221. Spray valve; 10222. Spray nozzle; 2. Flue gas inlet main pipe; 3. Steam main pipe; 4. Flue gas outlet main pipe; 5. Desorption module; 501. Third guide pipe; 502. Heat exchanger group; 5021. First heat exchanger; 5022. Second heat exchanger; 503. First branch pipe; 504. Second branch pipe; 505. Liquid separation mechanism; 5051. Layering tank; 5052. Liquid storage tank; 506. Pressure reduction circuit; 5061. Third branch pipe; 5062. Third... 5063. Control valve; 5064. Water ring vacuum pump; 5065. Water tank; 5066. Fourth branch pipe; 5067. Fourth control valve; 5068. Fifth control valve; 6. Flue gas inlet; 7. First guide pipe; 8. First valve; 9. Second valve; 10. Flue gas outlet; 11. Second guide pipe; 12. Third valve; 13. Fourth valve; 14. Connecting pipe; 15. First control valve; 16. Second control valve; 17. Diaphragm pump; 18. Overflow port; 19. Drain port; 20. Drain pump; 21. Sewage pipe; 22. Air outlet; 23. External water supply pipe; 24. Liquid level sensor; 25. Liquid level gauge; 26. Inspection port; 27. Fan. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example

[0043] like Figure 1 As shown, a flue gas adsorption-desorption system includes: multiple adsorption modules 1, a flue gas inlet main pipe 2, a steam main pipe 3, a flue gas outlet main pipe 4, and a desorption module 5;

[0044] like Figure 2 As shown, the adsorption module 1 includes multiple adsorption beds 101 and multiple resistance balancing devices 102 corresponding to the adsorption beds 101. Specifically:

[0045] like Figure 4 and Figure 6 As shown, in this example, there are two adsorption modules 1, and the number of adsorption beds 101 in a single adsorption module 1 is six, wherein an adsorbent is provided on the adsorption bed 101.

[0046] The bottom end of the adsorption bed 101 is connected to a flue gas inlet 6, and the flue gas inlet 6 is connected to a first guide pipe 7. A first valve 8 is installed at the left end of the first guide pipe 7, and a second valve 9 is installed at the right end. The first valve 8 is connected to the main flue gas discharge pipe 2. The flue gas to be purified enters the first guide pipe 7 through the first valve 8 from the main flue gas discharge pipe 2, and then enters the adsorption bed 101 through the flue gas inlet 6 for adsorption and purification.

[0047] The top of the adsorption bed 101 is connected to a flue gas outlet 10, and the flue gas outlet 10 is connected to a second guide pipe 11. A third valve 12 is installed at the left end of the second guide pipe 11, and a fourth valve 13 is installed at the right end. The third valve 12 is connected to the steam main pipe 3, and the fourth valve 13 is connected to the flue gas discharge main pipe 4. The purified flue gas enters the second guide pipe 11 from the flue gas outlet 10, and then enters the flue gas discharge main pipe 4 through the fourth valve 13 for discharge.

[0048] The resistance balancing device 102 includes a resistance measuring mechanism 1021 for measuring the resistance of the adsorption bed 101 and a resistance balancing mechanism 1022 for changing the internal resistance of the adsorption bed 101 according to the measured value of the resistance measuring mechanism 1021 to make the flue gas evenly distributed in each adsorption bed 101. Specifically:

[0049] The resistance balancing mechanism 1022 includes a controller (not shown), a spray valve 10221, and a spray nozzle 10222 installed in the adsorption bed 101. The resistance measuring mechanism 1021 is installed on the outside of the adsorption bed 101. The inlet end of the spray valve 10221 is connected to the external water supply pipe 23, and the outlet end is connected to the spray nozzle 10222. The controller is electrically connected to the spray valve 10221 and the resistance measuring mechanism 1021 respectively.

[0050] During the process of flue gas entering the adsorption bed 101, the resistance measuring mechanism 1021 detects the resistance inside the adsorption bed 101. If the resistance is less than a preset threshold, the controller controls the spray valve 10221 to open, and water from the external water supply pipe enters the spray port 10222 through the spray valve 10221 and is sprayed onto the adsorption bed 101 through the spray port 10222. Due to the increased water content, the resistance of the adsorption bed 101 increases, thereby balancing the resistance of each adsorption bed 101 and allowing the flue gas to enter each adsorption bed 101 evenly. When the resistance measuring mechanism 1021 detects that the internal resistance of the adsorption bed 101 meets the preset threshold, the controller controls the spray valve 10221 to close. In this example, the resistance measuring mechanism 1021 is a resistance detection sensor, model MPM430.

[0051] The second valve 9 is connected to the desorption module 5. After the adsorption bed 101 is saturated, steam enters the second guide pipe 11 through the third valve 12 from the main steam pipe 3, and then enters the adsorption bed 101 through the flue gas outlet 10 to heat and desorb the adsorption bed 101. The steam carries out the flue gas pollutants adsorbed by the adsorbent. The steam and pollutants enter the first guide pipe 7 through the flue gas inlet 6, and then enter the desorption module 5 through the second valve 9. Example

[0052] like Figure 1 As shown, a flue gas adsorption-desorption system includes: multiple adsorption modules 1, a flue gas inlet main pipe 2, a steam main pipe 3, a flue gas outlet main pipe 4, and a desorption module 5;

[0053] like Figure 2 As shown, the adsorption module 1 includes multiple adsorption beds 101 and multiple resistance balancing devices 102 corresponding to the adsorption beds 101. Specifically:

[0054] like Figure 4 and Figure 6 As shown, in this example, there are two adsorption modules 1, and the number of adsorption beds 101 in a single adsorption module 1 is six, wherein an adsorbent is provided on the adsorption bed 101.

[0055] The bottom end of the adsorption bed 101 is connected to a flue gas inlet 6, and the flue gas inlet 6 is connected to a first guide pipe 7. A first valve 8 is installed at the left end of the first guide pipe 7, and a second valve 9 is installed at the right end. The first valve 8 is connected to the main flue gas discharge pipe 2. The flue gas to be purified enters the first guide pipe 7 through the first valve 8 from the main flue gas discharge pipe 2, and then enters the adsorption bed 101 through the flue gas inlet 6 for adsorption and purification.

[0056] The top of the adsorption bed 101 is connected to a flue gas outlet 10, and the flue gas outlet 10 is connected to a second guide pipe 11. A third valve 12 is installed at the left end of the second guide pipe 11, and a fourth valve 13 is installed at the right end. The third valve 12 is connected to the steam main pipe 3, and the fourth valve 13 is connected to the flue gas discharge main pipe 4. The purified flue gas enters the second guide pipe 11 from the flue gas outlet 10, and then enters the flue gas discharge main pipe 4 through the fourth valve 13 for discharge.

[0057] The resistance balancing device 102 includes a resistance measuring mechanism 1021 for measuring the resistance of the adsorption bed 101 and a resistance balancing mechanism 1022 for changing the internal resistance of the adsorption bed 101 according to the measured value of the resistance measuring mechanism 1021 to make the flue gas evenly distributed in each adsorption bed 101. Specifically:

[0058] The resistance balancing mechanism 1022 includes a controller (not shown), a spray valve 10221, and a spray nozzle 10222 installed in the adsorption bed 101. The resistance measuring mechanism 1021 is installed on the outside of the adsorption bed 101. The inlet end of the spray valve 10221 is connected to the external water supply pipe 23, and the outlet end is connected to the spray nozzle 10222. The controller is electrically connected to the spray valve 10221 and the resistance measuring mechanism 1021 respectively.

[0059] During the process of flue gas entering the adsorption bed 101, the resistance measuring mechanism 1021 detects the resistance inside the adsorption bed 101. If the resistance is less than a preset threshold, the controller controls the spray valve 10221 to open, and water from the external water supply pipe enters the spray port 10222 through the spray valve 10221 and is sprayed onto the adsorption bed 101 through the spray port 10222. Due to the increased water content, the resistance of the adsorption bed 101 increases, thereby balancing the resistance of each adsorption bed 101 and allowing the flue gas to enter each adsorption bed 101 evenly. When the resistance measuring mechanism 1021 detects that the internal resistance of the adsorption bed 101 meets the preset threshold, the controller controls the spray valve 10221 to close. In this example, the resistance measuring mechanism 1021 is a resistance detection sensor, model MPM430.

[0060] The second valve 9 is connected to the desorption module 5. After the adsorption bed 101 is saturated, steam enters the second guide pipe 11 through the third valve 12 from the main steam pipe 3, and then enters the adsorption bed 101 through the flue gas outlet 10 to heat and desorb the adsorption bed 101. The steam carries away the flue gas pollutants adsorbed by the adsorbent. The steam and pollutants enter the first guide pipe 7 through the flue gas inlet 6, and then enter the desorption module 5 through the second valve 9.

[0061] like Figure 3 As shown, the desorption module 5 includes a third guide pipe 501, multiple heat exchanger groups 502 connected in series, a first branch pipe 503 for discharging steam into the heat exchanger group 502 for cooling, a second branch pipe 504 for discharging water accumulated in the adsorption bed 101 into the heat exchanger group 502 for cooling, a liquid distribution mechanism 505, and a pressure reduction circuit 506; one end of the third guide pipe 501 is connected to the second valve 9, and the other end is connected to the first branch pipe 503 and the second branch pipe 504 respectively; the heat exchanger group 502 is connected to the liquid distribution mechanism 505 and the pressure reduction circuit 506 respectively. Specifically:

[0062] The heat exchanger assembly 502 includes a first heat exchanger 5021 and a second heat exchanger 5022. The outlet end of the first heat exchanger 5021 is provided with a connecting pipe 14. One end of the connecting pipe 14 is connected to the outlet end of the first heat exchanger 5021, and the other end is connected to the inlet end of the second heat exchanger 5022.

[0063] The first branch pipe 503 is connected to the third guide pipe 501 at one end, and the first control valve 15 is installed thereon. The other end is connected to the inlet end of the first heat exchanger 5021. The second branch pipe 504 is connected to the third guide pipe 501 at one end, and the second control valve 16 and the diaphragm pump 17 are installed thereon in sequence. The diaphragm pump 17 is connected to the inlet end of the second heat exchanger 5022.

[0064] Steam and pollutants enter the first branch pipe 503 after passing through the third guide pipe 501 and the first control valve 15. They then enter the first heat exchanger 5021 for initial cooling, and then enter the second heat exchanger 5022 for further cooling through the connecting pipe 14. The steam and pollutants are transformed into liquid substances and non-condensable gases.

[0065] The liquid separation mechanism 505 includes a layering tank 5051 and a liquid storage tank 5052;

[0066] An overflow outlet 18 is installed on the top side of the stratification tank 5051. The overflow outlet 18 is connected to the liquid storage tank 5052. After the liquid substance and non-condensable gas are separated in the stratification tank 5051, the liquid substance with a density less than water enters the liquid storage tank 5052 through the overflow outlet 18.

[0067] like Figure 3 and Figure 5As shown, a drain port 19 is installed on the bottom side of the liquid storage tank 5052, and a drain pump 20 is installed on the drain port 19. A liquid level sensor 24 is installed on the liquid storage tank 5052. The liquid level sensor 24 and the drain pump 20 are both connected to the controller. When the liquid level in the liquid storage tank 5052 reaches the preset height, the drain pump 20 is turned on to drain the liquid. When the liquid level in the liquid storage tank 5052 is lower than the preset height, the drain pump 20 is turned off to stop draining the liquid.

[0068] A drain pipe 21 is installed on the side of the stratified tank 5051. Water and substances with a density greater than water in the stratified tank 5051 are discharged from the stratified tank 5051 through the drain pipe 21.

[0069] like Figure 3 and Figure 6 As shown, an air outlet 22 is also installed at the bottom of the stratified tank 5051. The air outlet 22 is connected to a fan 27. Non-condensable gas in the stratified tank 5051 is discharged from the stratified tank 5051 through the air outlet 22 and the fan 27.

[0070] The step-down circuit 506 includes a third branch pipe 5061, a third control valve 5062 installed at one end of the third branch pipe 5061, a water ring vacuum pump 5063 installed at the other end of the third branch pipe 5061, a water tank 5064, a fourth branch pipe 5065, a fourth control valve 5066 installed at one end of the fourth branch pipe 5065, and a fifth control valve 5067 installed on the connecting pipe 14; the third branch pipe 5061 is connected to the connecting pipe 14 through the third control valve 5062, and the third branch pipe 5061 is connected to the water tank 5064 through the water ring vacuum pump 5063;

[0071] One end of the fourth branch pipe 5065 is connected to the water tank 5064 via the fourth control valve 5066, and the other end of the fourth branch pipe 5065 is connected to the connecting pipe 14.

[0072] like Figure 3 and Figure 5 As shown, in this embodiment, the water tank 5064 is also equipped with a level gauge 25. The tops of the water tank 5064, the layered tank 5051 and the storage tank 5052 are all equipped with inspection ports 26, and an integrated structure is adopted to save on manufacturing materials and floor space.

[0073] When it is necessary to cool down the adsorption bed 101, close the third valve 12 to stop steam from entering the adsorption bed 101, close the fifth control valve 5067, open the third control valve 5062 and the fourth control valve 5066, start the water ring vacuum pump 5063, the internal pressure of the adsorption bed 101 drops, the water in the adsorption bed 101 evaporates after depressurization and takes away the heat, so that the adsorption bed 101 cools down quickly. The resistance balancing mechanism 1022 sprays water into the adsorption bed 101 through the spray nozzle 10222 to change the resistance, and can also use the sprayed water to cool down the adsorption bed 101. In conjunction with the pressure reduction circuit 506, the cooling effect of the adsorption bed 101 can be further improved.

[0074] Working principle

[0075] The flue gas to be purified enters the main flue gas discharge pipe 2 through the first valve 8 and enters the first guide pipe 7. Then, it enters the adsorption bed 101 through the flue gas inlet 6 for adsorption and purification. During the process of flue gas entering the adsorption bed 101, the resistance measuring mechanism 1021 detects the internal resistance of the adsorption bed 101. If the resistance is less than the preset threshold, the controller controls the spray valve 10221 to open. Water in the external water supply pipe enters the spray port 10222 through the spray valve 10221 and is sprayed onto the adsorption bed 101 through the spray port 10222. Due to the increased water content, the resistance of the adsorption bed 101 increases. When the resistance measuring mechanism 1021 detects that the internal resistance of the adsorption bed 101 meets the preset threshold, the controller controls the spray valve 10221 to close. The purified flue gas enters the second guide pipe 11 through the flue gas outlet 10 and then enters the main flue gas discharge pipe 4 through the fourth valve 13 for discharge.

[0076] After the adsorption bed 101 is saturated, steam enters the second guide pipe 11 through the third valve 12 from the main steam pipe 3, and then enters the adsorption bed 101 through the flue gas outlet 10 to heat and desorb the adsorption bed 101. The steam carries away the flue gas pollutants adsorbed by the adsorbent. The steam and pollutants enter the first guide pipe 7 through the flue gas inlet 6, and then enter the third guide pipe 501 through the second valve 9. After passing through the third guide pipe 501 and the first control valve 15, the steam and pollutants enter the first branch pipe 503, and then enter the first heat exchanger 502 from the first branch pipe 503. 1. The first cooling is performed, and then the steam and pollutants are transferred to the second heat exchanger 5022 through the connecting pipe 14 for a second cooling. The steam and pollutants are converted into liquid substances and non-condensable gases. The liquid substances and non-condensable gases enter the stratification tank 5051. After the liquid substances and non-condensable gases are separated in the stratification tank 5051, the liquid substances with a density less than water enter the storage tank 5052 through the overflow port 18. The water and substances with a density greater than water in the stratification tank 5051 are discharged from the stratification tank 5051 through the drain pipe 21. The non-condensable gases in the stratification tank 5051 are discharged from the stratification tank 5051 through the air outlet 22 by the fan.

[0077] When it is necessary to cool down the adsorption bed 101, close the third valve 12, stop the steam from entering the adsorption bed 101, close the fifth control valve 5067, open the third control valve 5062 and the fourth control valve 5066, start the water ring vacuum pump 5063, and the internal pressure of the adsorption bed 101 will decrease.

[0078] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0079] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0080] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A flue gas adsorption-desorption system, characterized in that, It includes multiple adsorption modules (1) for adsorbing flue gas, a flue gas discharge main pipe (2) for discharging flue gas into each adsorption module (1), a steam main pipe (3) for discharging desorption steam into each adsorption module (1), a flue gas discharge main pipe (4) for discharging the purified flue gas from each adsorption module (1), and a desorption module (5) for desorbing, purifying, reducing pressure and cooling the adsorption module (1). The adsorption module (1) includes multiple adsorption beds (101) and multiple resistance balancing devices (102) corresponding to the adsorption beds (101). The adsorption bed (101) has a flue gas inlet (6) at one end and a flue gas outlet (10) at the other end. The flue gas inlet (6) is connected to a first guide pipe (7), one end of the first guide pipe (7) is provided with a first valve (8), and the other end is provided with a second valve (9); the first valve (8) is connected to the flue gas discharge main pipe (2), and the second valve (9) is connected to the desorption module (5); The flue gas outlet (10) is connected to a second guide pipe (11), one end of which is provided with a third valve (12) and the other end with a fourth valve (13); the third valve (12) is connected to the main steam pipe (3), and the fourth valve (13) is connected to the main flue gas discharge pipe (4); The resistance balancing device (102) includes a resistance measuring mechanism (1021) for measuring the resistance of the adsorption bed (101) and a resistance balancing mechanism (1022) for changing the internal resistance of the adsorption bed (101) so that the flue gas is evenly distributed in each adsorption bed (101).

2. The flue gas adsorption-desorption system according to claim 1, characterized in that, The desorption module (5) includes a third guide pipe (501), multiple heat exchanger groups (502) connected in series, a first branch pipe (503) for discharging steam into the heat exchanger group (502) for cooling, a second branch pipe (504) for discharging water accumulated in the adsorption bed (101) into the heat exchanger group (502) for cooling, a liquid separation mechanism (505), and a pressure reduction circuit (506). One end of the third guide pipe (501) is connected to the second valve (9), and the other end is connected to the first branch pipe (503) and the second branch pipe (504) respectively; The heat exchanger assembly (502) is connected to the liquid distribution mechanism (505) and the pressure reduction circuit (506) respectively.

3. The flue gas adsorption-desorption system according to claim 2, characterized in that, The heat exchanger assembly (502) includes a first heat exchanger (5021) and a second heat exchanger (5022); the outlet end of the first heat exchanger (5021) is provided with a connecting pipe (14), one end of the connecting pipe (14) is connected to the outlet end of the first heat exchanger (5021), and the other end is connected to the inlet end of the second heat exchanger (5022).

4. The flue gas adsorption-desorption system according to claim 3, characterized in that, The first branch pipe (503) is connected to the third guide pipe (501) at one end with a first control valve (15), and the other end is connected to the inlet end of the first heat exchanger (5021).

5. The flue gas adsorption-desorption system according to claim 3, characterized in that, The second branch pipe (504) is connected to the third guide pipe (501) at one end, and a second control valve (16) and a diaphragm pump (17) are provided in sequence. The diaphragm pump (17) is connected to the inlet end of the second heat exchanger (5022).

6. The flue gas adsorption-desorption system according to claim 3, characterized in that, The pressure reduction circuit (506) includes a third branch pipe (5061), a third control valve (5062) located at one end of the third branch pipe (5061), a water ring vacuum pump (5063) located at the other end of the third branch pipe (5061), a water tank (5064), a fourth branch pipe (5065), a fourth control valve (5066) located at one end of the fourth branch pipe (5065), and a fifth control valve (5067) located on the connecting pipe (14). One end of the third branch pipe (5061) is connected to the connecting pipe (14) through the third control valve (5062), and the other end of the third branch pipe (5061) is connected to the water tank (5064) through the water ring vacuum pump (5063); One end of the fourth branch pipe (5065) is connected to the water tank (5064) through the fourth control valve (5066), and the other end of the fourth branch pipe (5065) is connected to the connecting pipe (14).

7. The flue gas adsorption-desorption system according to claim 2, characterized in that, The liquid distribution mechanism (505) includes a layering tank (5051) and a liquid storage tank (5052); The layered tank (5051) is provided with an overflow port (18); the overflow port (18) is connected to the storage tank (5052); after the liquid substances in the layered tank (5051) are layered, the liquid substances with a density less than that of water enter the storage tank (5052) through the overflow port (18). The storage tank (5052) is provided with a drain port (19), and the drain port (19) is provided with a drain pump (20).

8. The flue gas adsorption-desorption system according to claim 7, characterized in that, The layered trough (5051) is also equipped with a drain pipe (21) and an air outlet (22); Water and substances with a density greater than water in the stratification tank (5051) are discharged from the stratification tank (5051) through the drain pipe (21); The air outlet (22) is connected to a fan (27), and the non-condensable gas in the layered trough (5051) is discharged from the air outlet (22) through the fan (27) into the layered trough (5051).

9. The flue gas adsorption-desorption system according to claim 1, characterized in that, The resistance balancing mechanism (1022) includes a controller, a spray valve (10221), and a spray port (10222) disposed in the adsorption bed (101). The controller is electrically connected to the spray valve (10221) and the resistance measuring mechanism (1021) respectively; The inlet end of the spray valve (10221) is connected to the external water supply pipeline, and the outlet end is connected to the spray nozzle (10222).

10. The flue gas adsorption-desorption system according to claim 9, characterized in that, The resistance measuring mechanism (1021) is a resistance detection sensor, model MPM430.

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