Flue gas adsorption and desorption system

Abstract

The invention discloses a flue gas adsorption and desorption system, and belongs to the technical field of flue gas adsorption and purification. A plurality of adsorption modules are adopted to adsorb flue gas, so that the flue gas is dispersed and adsorbed, the resistance measuring mechanism is utilized to measure the resistance in each adsorption bed of the adsorption modules, and the flue gas uniformly enters each adsorption bed through the resistance balancing mechanism which changes the internal resistance of 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] The invention relates to a flue gas adsorption and desorption system, belonging to the technical field of flue gas adsorption and purification. Background Art

[0002] Adsorption and 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, the flue gas enters the tower body through the flue gas inlet of the adsorption tower. 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 contact the adsorbent evenly, resulting in a significantly higher amount of flue gas passing through some areas of the adsorption bed, resulting in inconsistent flue gas purification levels and affecting the flue gas adsorption effect; In order to make the flue gas evenly distributed, an air equalizing device is usually set at the flue gas inlet of the adsorption tower. However, the inventors found that since the adsorption bed is formed by stacking adsorbents of a certain thickness, the flow direction of the flue gas in the adsorption bed cannot be controlled after the flue gas enters the adsorption bed, and there is still a large difference in the amount of flue gas passing through different areas of the adsorption bed, resulting in inconsistent flue gas purification levels and differences in the adsorption saturation levels of adsorbents in different areas, which affects the flue gas adsorption effect and the utilization rate of the adsorbent; especially for large-diameter adsorption beds, the above problems are more obvious due to the large adsorption cross-section. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a flue gas adsorption and desorption system so that the flue gas is evenly distributed in the adsorption module during the adsorption purification process, and the flue gas is in uniform contact with the adsorbent, thereby solving the current problems of incomplete flue gas adsorption, unsatisfactory purification effect and low adsorbent utilization rate.

[0004] In order to achieve the above purpose / solve the above technical problems, the present invention is implemented by adopting the following technical solutions: A flue gas adsorption and desorption system, comprising a plurality of adsorption modules for adsorbing flue gas, a flue gas discharge main pipeline for discharging flue gas into each adsorption module, a steam main pipeline for discharging desorption steam into each adsorption module, a flue gas discharge main pipeline for discharging the purified flue gas from each adsorption module, and a desorption module for desorbing, purifying, decompressing and cooling the adsorption module; The adsorption module includes a plurality of adsorption beds and a plurality of resistance balancing devices corresponding to the adsorption beds; One end of the adsorption bed is provided with a smoke inlet, and the other end is provided with a smoke outlet; The flue gas inlet is connected to a first guide pipe, one end of the first guide pipe is provided with a first valve, and the other end is provided with a second valve; the first valve is connected to the flue gas discharge main pipeline, and the second valve is connected to the desorption module; The smoke outlet is connected to a second guide pipe, one end of the second guide pipe is provided with a third valve, and the other end is provided with a fourth valve; the third valve is connected to the steam main pipeline, and the fourth valve is connected to the smoke exhaust main pipeline; The resistance balancing device comprises 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 according to the measured value of the resistance measuring mechanism so as to evenly distribute the flue gas to each adsorption bed.

[0005] Optionally, the desorption module includes a third flow guide pipe, a plurality of heat exchanger groups connected in series, a first branch pipe for discharging steam into the heat exchanger group for cooling, a second branch pipe for discharging accumulated water in the adsorption bed into the heat exchanger group for cooling, a liquid separation mechanism and a pressure reduction circuit; One end of the third flow 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; The heat exchanger group is connected to the liquid separation mechanism and the pressure reduction circuit respectively.

[0006] Optionally, the heat exchanger group includes a first heat exchanger and a second heat exchanger; a connecting pipe is provided at the outlet end of the first heat exchanger, one end of the connecting pipe is connected to the outlet end of the first heat exchanger, and the other end is connected to the inlet end of the second heat exchanger.

[0007] Optionally, a first control valve is provided at one end of the first branch pipe connected to the third flow guiding pipe, and the other end is connected to the inlet end of the first heat exchanger.

[0008] Optionally, a second control valve and a diaphragm pump are sequentially arranged at one end of the second branch pipe connected to the third flow guiding pipe, and the diaphragm pump is connected to the inlet end of the second heat exchanger.

[0009] Optionally, the pressure reduction circuit includes a third branch pipe, a third control valve provided at one end of the third branch pipe, a water ring vacuum pump provided at the other end of the third branch pipe, a water tank, a fourth branch pipe, a fourth control valve provided at one end of the fourth branch pipe, and a fifth control valve provided on the connecting pipe; One end of the third branch pipe is connected to the connecting pipe through a third control valve, and the other end of the third branch pipe is connected to the water tank through a water ring vacuum pump; One end of the fourth branch pipe is connected to the water tank through a fourth control valve, and the other end of the fourth branch pipe is connected to the connecting pipe.

[0010] Optionally, the liquid separation mechanism includes a stratification tank and a liquid storage tank; The stratification tank is provided with an overflow port; the overflow port is connected to the liquid storage tank, and after the liquid substances in the stratification tank are stratified, the liquid substances with a density less than that of water enter the liquid storage tank through the overflow port; The liquid storage tank is provided with a liquid discharge port, and the liquid discharge port is provided with a liquid discharge pump.

[0011] Optionally, the stratification tank is also provided with a sewage pipe and an air outlet; The water and the substances with density greater than that of water in the stratification tank are discharged from the stratification tank through the sewage pipe; The air outlet is connected to a fan, and the non-condensable gas in the stratification tank is discharged from the stratification tank through the air outlet via the fan.

[0012] Optionally, the resistance balancing mechanism includes a controller, a spray valve and a spray port provided in the adsorption bed; The controller is electrically connected to the spray valve and the resistance measuring mechanism respectively; The inlet end of the spray valve is connected to the external water supply pipeline, and the outlet end is connected to the spray port.

[0013] Optionally, the resistance measuring mechanism is a resistance detection sensor, model MPM430.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts multiple adsorption modules to adsorb flue gas, so that the flue gas is dispersedly adsorbed, and uses a resistance measuring mechanism to measure the resistance in each adsorption bed of the adsorption module. The resistance balancing mechanism that changes the internal resistance of the adsorption bed according to the measurement value of the resistance measuring mechanism allows the flue gas to enter each adsorption bed evenly, thereby avoiding the accumulation of flue gas in a single adsorption bed, and making the flue gas evenly distributed in the adsorption module during the adsorption purification process. The flue gas is evenly contacted with the adsorbent, and the adsorption module is desorbed, depressurized and cooled by the desorption module, so as to quickly and effectively reduce the temperature of the adsorption bed, improve the operating efficiency of the adsorption module, and solve the current problems of incomplete flue gas adsorption, unsatisfactory purification effect and low adsorbent utilization rate.

[0015] 2. After the steam heats and desorbs the adsorption bed, the water ring vacuum pump in the decompression circuit is used to reduce the pressure of the internal components of the adsorption bed. After the water in the adsorption bed is reduced in pressure, it evaporates and takes away the heat, so that the adsorption bed is cooled quickly.

[0016] 3. The resistance balancing mechanism of the present invention can not only spray water into the adsorption bed through the spray port to change the resistance, but also use the sprayed water to cool the adsorption bed, and cooperate with the pressure reduction circuit to further improve the cooling effect of the adsorption bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a flue gas absorption and desorption system according to an embodiment of the present invention; Figure 2 is a schematic diagram of an adsorption module in a flue gas adsorption and desorption system according to an embodiment of the present invention; Figure 3 is a schematic diagram of a desorption module in a flue gas absorption and desorption system according to an embodiment of the present invention; Figure 4is a schematic diagram of an adsorption bed in a flue gas adsorption and desorption system according to an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a stratification tank, a liquid storage tank and a water tank in a flue gas adsorption and desorption system according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the distribution position of some structures in a flue gas adsorption and desorption system according to an embodiment of the invention (showing an adsorption module, a fan, a diaphragm pump, a liquid storage tank and a heat exchanger group).

[0018] In the figure: 1. adsorption module; 101. adsorption bed; 102. resistance balancing device; 1021. resistance measuring mechanism; 1022. resistance balancing mechanism; 10221. spray valve; 10222. spray port; 2. flue gas discharge into main pipeline; 3. steam main pipeline; 4. flue gas discharge main pipeline; 5. desorption module; 501. third flow 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. stratification tank; 5052. liquid storage tank; 506. pressure reduction circuit; 5061. third branch pipe; 5062. third Control valve; 5063, water ring vacuum pump; 5064, water tank; 5065, fourth branch pipe; 5066, fourth control valve; 5067, 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 pipeline; 24, liquid level sensor; 25, liquid level meter; 26, inspection port; 27, fan. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example

[0020] like Figure 1 As shown, a flue gas adsorption and desorption system comprises: a plurality of adsorption modules 1, a flue gas discharge main pipeline 2, a steam main pipeline 3, a flue gas discharge main pipeline 4 and a desorption module 5; like Figure 2 As shown, the adsorption module 1 includes a plurality of adsorption beds 101 and a plurality of resistance balancing devices 102 corresponding to the adsorption beds 101. Specifically: like Figure 4 and Figure 6As shown, in this example, the number of adsorption modules 1 is two, and the number of adsorption beds 101 in a single adsorption module 1 is six, wherein an adsorbent is disposed on the adsorption bed 101; The bottom end of the adsorption bed 101 is connected to a flue gas inlet 6, which 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 flue gas discharge main pipeline 2. The flue gas to be purified enters the first guide pipe 7 through the first valve 8 from the flue gas discharge main pipeline 2, and then enters the adsorption bed 101 through the flue gas inlet 6 for adsorption purification. The top of the adsorption bed 101 is connected with a flue gas outlet 10, which is connected with 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 pipeline 3, and the fourth valve 13 is connected to the flue gas exhaust main pipeline 4. The purified flue gas enters the second guide pipe 11 from the flue gas outlet 10, and then enters the flue gas exhaust main pipeline 4 through the fourth valve 13 for discharge. 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 so that the flue gas is evenly distributed in each adsorption bed 101. Specifically: The resistance balancing mechanism 1022 includes a controller (not shown), a spray valve 10221 and a spray port 10222 installed in the adsorption bed 101, and the resistance measuring mechanism 1021 is installed outside the adsorption bed 101; the inlet end of the spray valve 10221 is connected to the external water pipeline 23, and the outlet end is connected to the spray port 10222, and the controller is electrically connected to the spray valve 10221 and the resistance measuring mechanism 1021 respectively; When the flue gas enters the adsorption bed 101, the resistance measuring mechanism 1021 detects the resistance inside the adsorption bed 101. If the resistance is less than the preset threshold, the controller controls the spray valve 10221 to open, and the water in the external water pipe enters the spray port 10222 through the spray valve 10221, and is sprayed to the adsorption bed 101 through the spray port 10222. The adsorption bed 101 has an increased resistance due to the increased water content, thereby balancing the resistance of each adsorption bed 101 so that the flue gas can 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.

[0021] The second valve 9 is connected to the desorption module 5. After the adsorption bed 101 is saturated with adsorption, the steam enters the second guide pipe 11 from the steam main pipe 3 through the third valve 12, and then enters the adsorption bed 101 from 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, and the steam and the 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

[0022] like Figure 1 As shown, a flue gas adsorption and desorption system comprises: a plurality of adsorption modules 1, a flue gas discharge main pipeline 2, a steam main pipeline 3, a flue gas discharge main pipeline 4 and a desorption module 5; like Figure 2 As shown, the adsorption module 1 includes a plurality of adsorption beds 101 and a plurality of resistance balancing devices 102 corresponding to the adsorption beds 101. Specifically: like Figure 4 and Figure 6 As shown, in this example, the number of adsorption modules 1 is two, and the number of adsorption beds 101 in a single adsorption module 1 is six, wherein an adsorbent is disposed on the adsorption bed 101; The bottom end of the adsorption bed 101 is connected to a flue gas inlet 6, which 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 flue gas discharge main pipeline 2. The flue gas to be purified enters the first guide pipe 7 through the first valve 8 from the flue gas discharge main pipeline 2, and then enters the adsorption bed 101 through the flue gas inlet 6 for adsorption purification. The top of the adsorption bed 101 is connected with a flue gas outlet 10, which is connected with 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 pipeline 3, and the fourth valve 13 is connected to the flue gas exhaust main pipeline 4. The purified flue gas enters the second guide pipe 11 from the flue gas outlet 10, and then enters the flue gas exhaust main pipeline 4 through the fourth valve 13 for discharge. 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 so that the flue gas is evenly distributed in each adsorption bed 101. Specifically: The resistance balancing mechanism 1022 includes a controller (not shown), a spray valve 10221 and a spray port 10222 installed in the adsorption bed 101, and the resistance measuring mechanism 1021 is installed outside the adsorption bed 101; the inlet end of the spray valve 10221 is connected to the external water pipeline 23, and the outlet end is connected to the spray port 10222, and the controller is electrically connected to the spray valve 10221 and the resistance measuring mechanism 1021 respectively; When the flue gas enters the adsorption bed 101, the resistance measuring mechanism 1021 detects the resistance inside the adsorption bed 101. If the resistance is less than the preset threshold, the controller controls the spray valve 10221 to open, and the water in the external water pipe enters the spray port 10222 through the spray valve 10221, and is sprayed to the adsorption bed 101 through the spray port 10222. The adsorption bed 101 has an increased resistance due to the increased water content, thereby balancing the resistance of each adsorption bed 101 so that the flue gas can 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.

[0023] The second valve 9 is connected to the desorption module 5. After the adsorption bed 101 is saturated with adsorption, the steam enters the second guide pipe 11 through the third valve 12 from the steam main pipe 3, and then enters the adsorption bed 101 from the flue gas outlet 10 to heat and desorb the adsorption bed 101. The steam takes out the flue gas pollutants adsorbed by the adsorbent, and the steam and the 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, wherein: like Figure 3 As shown, the desorption module 5 includes a third flow guide pipe 501, a plurality of 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 accumulated water 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 flow guide pipe 501 is connected to the second valve 9, and the other end is respectively connected to the first branch pipe 503 and the second branch pipe 504; the heat exchanger group 502 is respectively connected to the liquid separation mechanism 505 and the pressure reduction circuit 506, specifically: The heat exchanger group 502 includes a first heat exchanger 5021 and a second heat exchanger 5022. A connecting pipe 14 is provided at the outlet of the first heat exchanger 5021. One end of the connecting pipe 14 is connected to the outlet of the first heat exchanger 5021, and the other end is connected to the inlet of the second heat exchanger 5022. The first branch pipe 503 is provided with a first control valve 15 at one end connected to the third flow guide pipe 501, and the other end is connected to the inlet end of the first heat exchanger 5021; the second branch pipe 504 is provided with a second control valve 16 and a diaphragm pump 17 at one end connected to the third flow guide pipe 501, and the diaphragm pump 17 is connected to the inlet end of the second heat exchanger 5022; The steam and pollutants pass through the third flow guide pipe 501 and the first control valve 15 and enter the first branch pipe 503, then enter the first heat exchanger 5021 through the first branch pipe 503 for the first cooling, and then enter the second heat exchanger 5022 through the connecting pipe 14 for the second cooling, and the steam and pollutants are converted into liquid substances and non-condensable gas; The liquid separation mechanism 505 includes a layering tank 5051 and a liquid storage tank 5052; An overflow port 18 is installed on the top of the side of the stratification tank 5051, and the overflow port 18 is connected to the liquid storage tank 5052. After the liquid substance and the non-condensable gas are separated in the stratification tank 5051, the liquid substance with a density less than that of water enters the liquid storage tank 5052 through the overflow port 18. like Figure 3 and Figure 5 As shown, a drain port 19 is installed at the bottom of the side of the liquid storage tank 5052, and a drain pump 20 is installed at 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 a 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 and the drainage stops.

[0024] A sewage pipe 21 is installed on the side of the stratification tank 5051, and the water and substances with a density greater than that of water in the stratification tank 5051 are discharged from the stratification tank 5051 through the sewage pipe 21; like Figure 3 and Figure 6 As shown, an air outlet 22 is also installed at the bottom of the stratification groove 5051, and the air outlet 22 is connected to the fan 27. The non-condensable gas in the stratification groove 5051 is discharged from the stratification groove 5051 through the air outlet 22 and the fan 27.

[0025] The pressure reduction 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 at 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; 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 .

[0026] like Figure 3 and Figure 5As shown, in this embodiment, the water tank 5064 is also equipped with a liquid level meter 25, and the tops of the water tank 5064, the stratification tank 5051 and the liquid storage tank 5052 are all equipped with inspection ports 26, and an integrated structure is adopted to save manufacturing materials and floor space.

[0027] When the adsorption bed 101 needs to be cooled, the third valve 12 is closed, steam stops entering the adsorption bed 101, the fifth control valve 5067 is closed, the third control valve 5062 and the fourth control valve 5066 are opened, the water ring vacuum pump 5063 is started, the internal pressure of the adsorption bed 101 decreases, the water in the adsorption bed 101 evaporates after decompression and takes away the heat, so that the adsorption bed 101 is cooled down rapidly, and the resistance balancing mechanism 1022 can spray water into the adsorption bed 101 through the spray port 10222 to change the resistance, and can also use the sprayed water to cool the adsorption bed 101, and the pressure reduction circuit 506 can further improve the cooling effect of the adsorption bed 101.

[0028] How it works The flue gas to be purified is discharged from the flue gas main pipeline 2 into the first guide pipe 7 through the first valve 8, and then enters the adsorption bed 101 through the flue gas inlet 6 for adsorption purification. In the process of the 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 the preset threshold, the controller controls the spray valve 10221 to open, and the water in the external water pipe enters the spray port 10222 through the spray valve 10221, and is sprayed to the adsorption bed 101 through the spray port 10222. The adsorption bed 101 increases in resistance due to the increase in water content. 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, and the purified flue gas enters the second guide pipe 11 from the flue gas outlet 10, and then enters the flue gas discharge main pipeline 4 through the fourth valve 13 for discharge; After the adsorption bed 101 is saturated with adsorption, the steam enters the second guide pipe 11 through the third valve 12 from the steam main pipe 3, and then enters the adsorption bed 101 from the flue gas outlet 10 to heat and desorb the adsorption bed 101. The steam takes out the flue gas pollutants adsorbed by the adsorbent, and the steam and the 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. The steam and the pollutants pass through the third guide pipe 501 and the first control valve 15 and enter the first branch pipe 503, and then enter the first heat exchanger 502 from the first branch pipe 503. 1 for the first cooling, and then enters the second heat exchanger 5022 through the connecting pipe 14 for the 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 stratified in the stratification tank 5051, the liquid substances with a density less than water enter the liquid 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, and the non-condensable gases in the stratification tank 5051 are discharged from the stratification tank 5051 through the air outlet 22 through the fan; When the adsorption bed 101 needs to be cooled, the third valve 12 is closed, steam stops entering the adsorption bed 101, the fifth control valve 5067 is closed, the third control valve 5062 and the fourth control valve 5066 are opened, the water ring vacuum pump 5063 is started, and the internal pressure of the adsorption bed 101 decreases.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A flue gas adsorption and desorption system, characterized in that: It comprises a plurality of adsorption modules (1) for adsorbing flue gas, a flue gas discharge main pipeline (2) for discharging flue gas into each adsorption module (1), a steam main pipeline (3) for discharging desorption steam into each adsorption module (1), a flue gas discharge main pipeline (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) comprises a plurality of adsorption beds (101) and a plurality of resistance balancing devices (102) corresponding to the adsorption beds (101); The adsorption bed (101) is provided with a smoke inlet (6) at one end and a smoke outlet (10) at the other end; The flue gas inlet (6) is connected to a first flow guide pipe (7); one end of the first flow 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 smoke outlet (10) is connected to a second flow guide pipe (11); a third valve (12) is provided at one end of the second flow guide pipe (11), and a fourth valve (13) is provided at the other end; the third valve (12) is connected to the steam main pipe (3), and the fourth valve (13) is connected to the smoke exhaust main pipe (4); The resistance balancing device (102) comprises 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) so that the flue gas is evenly distributed on each adsorption bed (101).

2. The flue gas adsorption and desorption system according to claim 1, characterized in that: The desorption module (5) comprises a third flow guide pipe (501), a plurality of 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 accumulated water 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 flow guide pipe (501) is connected to the second valve (9), and the other end is respectively connected to the first branch pipe (503) and the second branch pipe (504); The heat exchanger group (502) is respectively connected to the liquid separation mechanism (505) and the pressure reduction circuit (506).

3. The flue gas adsorption and desorption system according to claim 2, characterized in that: The heat exchanger group (502) comprises a first heat exchanger (5021) and a second heat exchanger (5022); a connecting pipe (14) is provided at the outlet end of the first heat exchanger (5021); 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 and desorption system according to claim 3, characterized in that: One end of the first branch pipe (503) connected to the third flow guide pipe (501) is provided 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 and desorption system according to claim 3, characterized in that: A second control valve (16) and a diaphragm pump (17) are provided in sequence at one end of the second branch pipe (504) connected to the third flow guide pipe (501); the diaphragm pump (17) is connected to the inlet end of the second heat exchanger (5022).

6. The flue gas adsorption and desorption system according to claim 3, characterized in that: The pressure reduction circuit (506) comprises a third branch pipe (5061), a third control valve (5062) provided at one end of the third branch pipe (5061), a water ring vacuum pump (5063) provided at the other end of the third branch pipe (5061), a water tank (5064), a fourth branch pipe (5065), a fourth control valve (5066) provided at one end of the fourth branch pipe (5065), and a fifth control valve (5067) provided at the connecting pipe (14); One end of the third branch pipe (5061) is connected to the connecting pipe (14) via a third control valve (5062), and the other end of the third branch pipe (5061) is connected to the water tank (5064) via a water ring vacuum pump (5063); One end of the fourth branch pipe (5065) is connected to the water tank (5064) via a 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 and desorption system according to claim 2, characterized in that: The liquid separation mechanism (505) comprises a layering tank (5051) and a liquid storage tank (5052); The stratification tank (5051) is provided with an overflow port (18); the overflow port (18) is connected to the liquid storage tank (5052); after the liquid substances in the stratification tank (5051) are stratified, the liquid substances with a density less than that of water enter the liquid storage tank (5052) through the overflow port (18); The liquid storage tank (5052) is provided with a liquid discharge port (19), and the liquid discharge port (19) is provided with a liquid discharge pump (20).

8. The flue gas adsorption and desorption system according to claim 7, characterized in that: The stratification tank (5051) is also provided with a sewage discharge pipe (21) and an air outlet (22); The water and substances with a density greater than that of 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 stratification groove (5051) is discharged from the stratification groove (5051) through the air outlet (22) and the fan (27).

9. The flue gas adsorption and desorption system according to claim 1, characterized in that: The resistance balancing mechanism (1022) comprises a controller, a spray valve (10221), and a spray port (10222) provided 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 an external water supply pipeline, and the outlet end is connected to the spray port (10222).

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

Images