CN218012021U - Gas absorption system - Google Patents

Abstract

The utility model provides a gas absorption system. A gas absorption system for absorbing carbon dioxide gas in an environment, the gas absorption system comprising: the shell is provided with an air inlet and an air outlet, the air inlet is communicated with the air outlet, and the air outlet is positioned above the air inlet; the gas pretreatment device is arranged in the shell and positioned at the gas inlet so as to filter impurities in the gas entering the gas inlet; the gas absorption assembly is arranged in the shell and located at the downstream of the gas pretreatment device, the gas absorption assembly comprises a first liquid supply device and a first spraying structure, the first liquid supply device is communicated with the first spraying structure and used for providing alkaline solution, and the alkaline solution flowing out of the first spraying structure and carbon dioxide gas in the gas are subjected to chemical reaction to absorb the carbon dioxide gas. The utility model provides an among the prior art impurity such as solid particle that mix with in air or the flue gas easily accumulate in CO2 entrapment system problem.

Description

Gas absorption system

Technical Field

The utility model relates to a carbon dioxide entrapment technical field particularly, relates to a gas absorption system.

Background

At present, the mainstream CO2 capture methods at home and abroad mainly comprise a liquid amine adsorption method, a solid film adsorption method and the like. However, the above-described capture method can capture only CO2 of high concentration, and cannot capture CO2 of a wide concentration range, such as low concentration CO2 in the air.

In the prior art, in order to solve the above problems, a liquid alkaline solution and a solid amine membrane are combined to adsorb CO2. However, in the process of adsorbing CO2 in air or flue gas by using the above method, impurities such as solid particles entrained in air or flue gas may accumulate in the CO2 capture system, which not only affects the capture efficiency of the CO2 capture system, but also requires workers to clean the impurities in the CO2 capture system regularly, thereby increasing the operation and maintenance costs of the CO2 capture system.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a gas absorption system to solve the problem that impurities such as solid particle that mix with in air or the flue gas among the prior art easily accumulated in CO2 entrapment system.

In order to achieve the above object, the present invention provides a gas absorption system for absorbing carbon dioxide gas in an environment, the gas absorption system comprising: the shell is provided with an air inlet and an air outlet, the air inlet is communicated with the air outlet, and the air outlet is positioned above the air inlet; the gas pretreatment device is arranged in the shell and positioned at the gas inlet so as to filter impurities in the gas entering the gas inlet; the gas absorption assembly is arranged in the shell and located at the downstream of the gas pretreatment device, the gas absorption assembly comprises a first liquid supply device and a first spraying structure, the first liquid supply device is communicated with the first spraying structure and used for providing alkaline solution, and the alkaline solution flowing out of the first spraying structure and carbon dioxide gas in the gas are subjected to chemical reaction to absorb the carbon dioxide gas.

Further, the gas absorption assembly further comprises: the first filler is arranged opposite to the exhaust port and is positioned below the first spraying structure; and the first water collector is positioned above the first spraying structure.

Further, the gas absorption assembly further comprises: the first buffer structure is positioned below the first filler and used for buffering the solution after the solution and the carbon dioxide gas complete a chemical reaction; the two ends of the first pipeline are respectively communicated with the first cache structure and the first spraying structure; the first pump body is arranged on the first pipeline and used for pumping the solution entering the first cache structure into the first spraying structure.

Further, the gas pretreatment device includes: the second filler is arranged opposite to the air inlet; a second liquid supply device; and the second spraying structure is positioned above the second filler, and the second liquid supply device is communicated with the second spraying structure.

Further, the gas pretreatment device further comprises: the second water collector is arranged opposite to the second filler; one second water collector is provided; or the number of the second water collectors is multiple, at least one second water collector is positioned on the first side of the second filler, and at least one second water collector is positioned on the second side of the second filler.

Further, the gas pretreatment device further comprises: the second buffer structure is positioned below the second filler and used for buffering liquid flowing out of the second filler; the two ends of the second pipeline are respectively communicated with the second spraying structure and the second cache structure; and the second pump body is arranged on the second pipeline and used for pumping the liquid entering the second cache structure into the second spraying structure.

Further, the second cache structure comprises: a cache body; the baffle plate is arranged in the cache body to divide the inner cavity of the cache body into a first sub-containing cavity and a second sub-containing cavity, the first sub-containing cavity is positioned below the second filler, and the second sub-containing cavity is communicated with the second pipeline; wherein, the baffle has the overflow hole or with buffer memory body between form the overflow portion, first son holds the chamber and holds the chamber intercommunication through overflow hole or overflow portion and second son.

Furthermore, the second filler comprises a plurality of sub-filler pieces, two adjacent sub-filler pieces are arranged in a staggered mode to form a flow passage, and a flow disturbance bulge or a flow disturbance concave part located in the flow passage is arranged on the surface of each sub-filler piece.

Further, the gas pretreatment device is a filter screen or a filter membrane.

Furthermore, the shell is provided with an accommodating cavity, the air inlet is communicated with the air outlet through the accommodating cavity, and the air absorption assembly is positioned in the accommodating cavity; one gas inlet and one gas pretreatment device; or, the air inlet is a plurality of, and a plurality of air inlets are around holding the chamber setting, and gaseous preprocessing device is a plurality of, and a plurality of gaseous preprocessing device set up with a plurality of air inlets one-to-one.

Further, the gas absorption system further comprises: the gas conveying device is arranged at the gas outlet and/or the gas inlet and is used for conveying gas out of the gas absorption system through the gas inlet; the first detection device is arranged in the first cache structure and used for detecting the concentration of carbonate in the solution; and when the detection value of the first detection device reaches a first preset concentration value, controlling the gas conveying device to stop running.

Further, the gas delivery device comprises: the fan is arranged at the air outlet; and/or a compressor arranged at the air inlet.

Further, the gas absorption system further comprises: the second detection device is arranged in the first cache structure and is used for detecting the concentration of hydroxyl in the solution; and when the detection value of the second detection device is smaller than a second preset concentration value, controlling the first pump body to start.

Furthermore, the bottom surface of the first buffer memory structure is provided with a flow guide inclined surface.

Further, the gas absorption system further comprises: the water turbine is positioned below the first cache structure, and liquid in the first cache structure flows to the water turbine through the diversion inclined plane; and the generator is connected with the water turbine.

Further, the gas absorption system further comprises: and the stirring device is arranged in the first cache structure.

Use the technical scheme of the utility model, gaseous preprocessing device sets up in the casing and is located air inlet department, and gaseous absorption subassembly is located gaseous preprocessing device's low reaches department. Like this, in the gas absorption system operation in-process, air or flue gas get into gas absorption system via the air inlet and pass through gaseous preprocessing device earlier, gaseous preprocessing device filters the impurity in air or the flue gas, and then avoid above-mentioned impurity to pile up in gas absorption system, influence its absorption to carbon dioxide gas, entrapment efficiency in getting into the gas absorption subassembly even, the problem of impurity such as the solid particle that mix with in the air or the flue gas among the prior art easily accumulations in CO2 entrapment system has been solved, and then the operation of gas absorption system, the maintenance cost has been reduced. Meanwhile, the absorption of impurities in air or flue gas can also improve the purity of the solution formed after the chemical reaction of the alkaline solution and carbon dioxide gas, and reduce the cost of the post-treatment process.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows a front view of an embodiment of a gas absorption system according to the present invention;

FIG. 2 shows a top view of the gas absorption system of FIG. 1;

fig. 3 shows a side view of the gas absorption system of fig. 1.

Wherein the figures include the following reference numerals:

10. a housing; 11. an air inlet; 12. an exhaust port; 13. an accommodating chamber; 20. a gas pretreatment device; 21. a second filler; 22. a second spray structure; 23. a second water collector; 24. a second cache structure; 25. a second pipeline; 26. a second pump body; 30. a gas absorption assembly; 31. a first spray structure; 32. a first filler; 33. a first water collector; 34. a first cache structure; 35. a first pipeline; 36. a first pump body; 40. a gas delivery device; 51. a main pipeline; 52. a branch pipeline; 60. an air duct; 70. a gear case; 80. stairs.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional terms such as "upper" and "lower" is generally with respect to the orientation shown in the drawings, or to the vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself, but the above directional terms are not intended to limit the present invention.

In order to solve the problem that impurities such as solid particles mixed in air or flue gas are easy to accumulate in a CO2 capture system in the prior art, the application provides a gas absorption system.

As shown in fig. 1 to 3, the gas absorption system is used for absorbing carbon dioxide gas in the environment, and includes a housing 10, a gas pretreatment device 20 and a gas absorption assembly 30. The casing 10 has an air inlet 11 and an air outlet 12, the air inlet 11 is communicated with the air outlet 12, and the air outlet 12 is located above the air inlet 11. The gas preprocessing device 20 is disposed in the cabinet 10 at the gas inlet 11 for filtering impurities in the gas entering the gas inlet 11. The gas absorption assembly 30 is disposed in the housing 10 and located downstream of the gas pretreatment device 20, the gas absorption assembly 30 includes a first liquid supply device and a first spraying structure 31, the first liquid supply device is communicated with the first spraying structure 31 to provide an alkaline solution, and the alkaline solution flowing out from the first spraying structure 31 and the carbon dioxide gas in the gas undergo a chemical reaction to absorb the carbon dioxide gas.

With the solution of the present embodiment, the gas pretreatment device 20 is disposed in the cabinet 10 at the gas inlet 11, and the gas absorption assembly 30 is located at the downstream of the gas pretreatment device 20. Like this, in the gas absorption system operation in-process, air or flue gas pass through gas preprocessing device 20 behind the gas absorption system of air inlet 11 entering earlier, gas preprocessing device 20 filters the impurity in air or the flue gas, and then avoid above-mentioned impurity to pile up in the gas absorption system, influence its absorption to carbon dioxide gas, capture efficiency even get into in the gas absorption subassembly 30, solved among the prior art problem that impurity such as solid particle that mix with in air or the flue gas is easy to accumulate in CO2 capture system, and then reduced the operation of gas absorption system, maintenance cost. Meanwhile, the purity of the solution formed after the chemical reaction of the alkaline solution and the carbon dioxide gas can be improved by absorbing impurities in the air or the flue gas, and the cost of the post-treatment process is reduced.

Optionally, the alkaline solution is sodium hydroxide, potassium carbonate, or sodium carbonate, and deionized water may be used to prepare solutions of different concentrations as required.

In the present embodiment, the alkaline solution is used as the absorbent, so that not only the CO2 of high concentration but also the CO2 of low concentration can be captured, thereby capturing the CO2 of wide concentration range.

In this embodiment, the gas absorption system is a counter-flow absorption system, i.e. the air intake direction and the exhaust direction of the air or flue gas are perpendicular to each other.

In this embodiment, the number of the first spraying structures 31 is plural, and the plural first spraying structures 31 are arranged at intervals along the flow direction of the gas in the gas absorption system, so that the spraying amount of the alkaline solution of the first spraying structures 31 is increased, and the alkaline solution sprayed from the first spraying structures 31 can be ensured to be sufficiently collected and absorbed with CO2 in the air or the flue gas.

Specifically, the side wall of the cabinet 10 is provided with a stair 80, and a worker can climb to the top of the cabinet 10 through the stair 80 to overhaul the gas absorption system.

Optionally, the first sprinkling structure 31 is a shower head.

As shown in fig. 1 to 3, the gas absorption assembly 30 further includes a first packing 32 and a first water collector 33. The first filler 32 is disposed opposite to the exhaust port 12, and the first filler 32 is located below the first spraying structure 31. The first water collector 33 is located above the first sprinkling structure 31. In this way, the first filler 32 provides a sufficient contact surface for the CO2 and the alkaline solution, so that the CO2 in the air or the flue gas and the alkaline solution can fully react, and the efficiency of capturing and absorbing the CO2 by the gas absorption assembly 30 is further improved. The first water collector 33 is used for collecting water vapor in the housing to reduce fine water droplets drifting in the gas discharged from the gas outlet 12, and can effectively prevent the loss of liquid water due to the water flying phenomenon at the gas outlet 12.

Specifically, the alkaline solution falls in the form of droplets from the first spraying structure 31 into the first filler 32, flows in the form of a liquid film in the first filler 32, passes through the first filler 32, and then falls in the form of droplets into the first buffer structure 34. Impurities carried in the air or the flue gas are removed through the gas pretreatment device 20 and then enter the gas absorption assembly 30, the pretreated gas is fully contacted with an alkaline solution in a water spraying area of the gas absorption assembly 30 and the first filler 32, so that CO2 in the air or the flue gas is subjected to a chemical reaction with the alkaline solution, CO2 is captured, the captured CO2 exists in the first buffer structure 34 in the form of carbonate and bicarbonate ions, and the reacted solution is conveyed to a subsequent process system through the first pump body 36 for treatment. Meanwhile, the first buffer structure 34 is equipped with a first liquid supply device to replenish water and hydroxyl ions consumed in the solution.

Optionally, the first filler 32 is a film-type water-spraying filler, and the length is 0.1-15 m.

Optionally, the first water collector 33 is a PVC water collector, the length of the first water collector is 0.1 to 1m, and the first water collector 33 is supported by a bracket.

As shown in fig. 1 to 3, the gas absorption assembly 30 further includes a first buffer structure 34, a first pipeline 35 and a first pump body 36. Wherein the first buffer structure 34 is located below the first filler 32 for buffering the solution after the chemical reaction with the carbon dioxide gas. Two ends of the first pipeline 35 are respectively communicated with the first buffer structure 34 and the first spraying structure 31. A first pump 36 is arranged on the first pipe 35 for pumping the solution entering the first buffer structure 34 into the first spray structure 31. Therefore, the solution after the chemical reaction with the carbon dioxide gas is stored through the first buffer structure 34, which is convenient for post-processing the solution on the one hand; on the other hand, the recycling of the solution can be realized, so that the waste of resources is avoided. Meanwhile, the solution is pumped into the first spraying structure 31 through the first pump body 36, so that the first spraying structure 31 can spray alkaline solution to react with CO2, the spraying reliability of the first spraying structure 31 is improved, and the operation reliability of the gas absorption system is improved.

In this embodiment, the first buffer structure 34 and the first liquid supply device are of the same structure, at the initial stage of operation of the gas absorption system, an alkaline solution is placed in the first buffer structure 34, the alkaline solution is sprayed to the first filler 32 through the first spraying structure 31 to react with CO2 in air or flue gas, the solution after the reaction is buffered in the first buffer structure 34, so as to enter the first spraying structure 31 again to continue spraying, so as to realize recycling of the alkaline solution, until carbonate in the alkaline solution reaches a preset concentration value, at this time, trapping and absorption of CO2 are stopped, and the solution in the first buffer structure 34 is replaced by the alkaline solution.

It should be noted that, the relationship between the first buffer structure 34 and the first liquid supply device is not limited to this, and may be adjusted according to the working condition and the use requirement. Optionally, the first buffer structure 34 is communicated with the first liquid supply device to supply an alkaline solution into the first spraying structure 31 through the first liquid supply device, and the solution after reaction with CO2 is buffered in the first buffer structure 34 so as to reenter the first spraying structure 31 for continuous spraying.

Optionally, there is one first cache structure 34; alternatively, the number of the first cache structures 34 is plural, and the plural first cache structures 34 can be selectively used. In this way, in the operation process of the gas absorption system, the use state (in use or not in use) of the first buffer structure 34 can be adjusted according to the carbonate concentration in the first buffer structure 34, so as to supplement a fresh alkaline solution into the first spraying structure 31, and realize the rapid and efficient capture of CO2 by the gas absorption system.

Optionally, there are a plurality of first buffer structures 34, and the gas absorption assembly 30 further includes a first pipeline 35, a plurality of branch pipelines, and a plurality of control valves. A first end of the first conduit 35 communicates with the first spray structure 31. The plurality of branch pipelines are arranged in one-to-one correspondence with the plurality of first cache structures 34, and two ends of each branch pipeline are respectively communicated with the second ends of the corresponding first cache structures 34 and the corresponding first pipelines 35. The control valves are arranged in one-to-one correspondence with the branch pipelines, and each control valve controls the on-off state of the corresponding branch pipeline. Wherein at any time, at least one control valve is in an open state. Therefore, the on-off state of the branch pipeline corresponding to the control valve is controlled through the control valve to control the use state of the first cache structure 34 communicated with the branch pipeline, so that the control of the use state of the first cache structure 34 by a worker is easier and simpler, and the control difficulty is reduced. Meanwhile, the arrangement enables the plurality of first buffer structures 34 to be arranged in parallel, and at any time, at least one first buffer structure 34 is controlled to be put into use to provide the alkaline solution for the first spraying structure 31.

As shown in fig. 1 to 3, the gas pretreatment device 20 includes a second filler 21, a second liquid supply device, and a second spraying structure 22. Wherein the second filler 21 is disposed opposite to the intake port 11. The second spraying structure 22 is positioned above the second filler 21, and the second liquid supply device is communicated with the second spraying structure 22. Specifically, the second spraying structure 22 is used for spraying water, and in the process of filtering impurities in the air or flue gas by the gas pretreatment device 20, sufficient contact surfaces are provided for the impurities in the air or flue gas and the water through the second filler 21, so as to ensure that the water can sink the impurities, and further prevent the impurities from entering the gas absorption assembly 30.

Specifically, after passing through the gas pretreatment device 20, the humidity of the gas can be increased, the evaporation capacity of water in the gas absorption system can be reduced, the loss of deionized water can be reduced, and the cost of CO2 capture can be reduced.

In this embodiment, the second liquid supply device is used for supplying tap water.

Optionally, the second spray structure 22 is a showerhead.

Optionally, the second packing 21 is a film type water-sprinkling packing.

Optionally, the second water collector 23 is a PVC water collector.

As shown in fig. 1 to 3, the gas absorption assembly 30 further includes a main pipe 51 and a branch pipe 52. The main pipe 51 is connected to the first pipe 35, a plurality of branch pipes 52 are provided, and each branch pipe 52 is connected to the main pipe 51. The number of the first spraying structures 31 is plural, and a plurality of the first spraying structures 31 are provided on each branch pipe 52.

As shown in fig. 1 to 3, the gas pretreatment device 20 further includes a second water receiver 23. The second water receiver 23 is arranged opposite to the second filler 21. In this way, the second water collector 23 is used for collecting water vapor in the housing to reduce fine water droplets drifting in the gas discharged from the exhaust port 12, and can effectively prevent the loss of liquid water due to the water flying phenomenon at the exhaust port 12.

Optionally, there is one second water collector 23; or, there are a plurality of second water collectors 23, at least one second water collector 23 is located on the first side of the second packing 21, and at least one second water collector 23 is located on the second side of the second packing 21. Like this, above-mentioned setting makes the number of second water receiver 23 select more nimble to satisfy different user demand and operating mode, also promoted staff's processing flexibility. Meanwhile, the plurality of second water collectors 23 can improve the water vapor recovery efficiency, and further prevent the loss of liquid water due to the water splashing at the exhaust port 12.

In this embodiment, there are two second water collectors 23, one second water collector 23 is located on the first side of the second packing 21, and the other second water collector 23 is located on the second side of the second packing 21, so as to fully recover the water vapor in the enclosure.

It should be noted that the number of the second water collectors 23 is not limited to this, and may be adjusted according to the working condition and the use requirement. Alternatively, the second water collectors 23 are three, and four, and five, and a plurality.

As shown in fig. 1 to 3, the gas pretreatment device 20 further includes a second buffer structure 24, a second pipeline 25 and a second pump 26. Wherein the second buffer structure 24 is located below the second filler 21 for buffering the liquid flowing out through the second filler 21. Two ends of the second pipeline 25 are respectively communicated with the second spraying structure 22 and the second buffer structure 24. A second pump 26 is provided on the second conduit 25 for pumping liquid entering the second buffer structure 24 into the second spray structure 22. In this way, the water left from the second filling 21 is stored by the second buffer structure 24, so as to realize the recycling of the water, and avoid the waste of resources. Meanwhile, the water is pumped into the second spraying structure 22 through the second pump body 26, so that the second spraying structure 22 can spray water to sink impurities, the spraying reliability of the second spraying structure 22 is improved, and the operation reliability of the gas pretreatment device 20 is improved.

Optionally, the second cache structure 24 comprises a cache body and a partition. Wherein, the baffle setting is in this internally at the buffer memory to separate the inner chamber of buffer memory body for first son holds the chamber and the chamber is held to the second son, and first son holds the chamber and is located the below that the second packed 21, and the second son holds chamber and second pipeline 25 intercommunication. Wherein, the baffle has the overflow hole or with buffer memory body between form the overflow portion, first son holds the chamber and holds the chamber intercommunication through overflow hole or overflow portion and second son. Like this, the aforesaid setting of baffle ensures that the impurity that gets into first son after the second sprays structure 22 sprays and holds the intracavity fully deposits in first son holds the intracavity, avoids impurity to get into and causes the second in the second pipeline 25 to spray structure 22 and blocks up, has promoted the second and has sprayed structure 22's the efficiency of spraying. Simultaneously, above-mentioned setting makes the overflow mode of liquid in second buffer memory structure 24 more diversified to satisfy different user demand and operating mode, also promoted staff's processing flexibility.

Optionally, the length of the second filler 21 is greater than or equal to 2m and less than or equal to 15m.

In the present embodiment, the length of the second filler 21 is 8m, which reduces the processing cost of the second filler 21.

It should be noted that, the length of the second filler 21 is not limited to this, and may be adjusted according to the working condition and the use requirement. Optionally, the length of the second filler 21 is 5m, or 10m, or 12m, or 13m.

Optionally, the second filler 21 includes a plurality of sub filler pieces, two adjacent sub filler pieces are staggered to form a flow passage, and a flow disturbing protrusion or a flow disturbing recess located in the flow passage is provided on a surface of each sub filler piece. In this way, the gas and the liquid mixed with impurities are collected in the flow passage, and the turbulence protrusion or the turbulence concave part is arranged to enable the gas to generate turbulence at the position, so that the contact area of the gas and the liquid is further increased, and the impurities mixed in the gas are ensured to be contacted with the liquid as much as possible and to be impacted into the second buffer structure 24 by the liquid.

In other embodiments not shown in the drawings, the gas pretreatment device 20 is a filter screen or membrane. Thus, the above arrangement reduces the processing cost and processing difficulty of the gas pretreatment device 20.

Optionally, the bottom surface of the first buffer structure 34 has a flow guiding slope. Thus, the solution is collected to a relatively lower position on the bottom surface in the first buffer structure 34 due to the arrangement, so that the solution can conveniently enter the first pipeline 35, and the problem that the cleaning difficulty of workers is increased due to accumulation of the solution at a dead angle in the first buffer structure 34 is avoided.

In this embodiment, the bottom surface of the first buffer structure 34 is an inclined surface. Thus, the arrangement makes the bottom surface of the first buffer structure 34 easier to process and implement, and reduces the processing cost of the gas absorption system.

In other embodiments not shown in the drawings, the bottom surface of the first buffer structure 34 is a conical surface.

In this embodiment, the second buffer structure 24 and the second liquid supply device are the same structure, so as to reduce the number of structures of the gas absorption system, and facilitate the worker to disassemble, assemble and maintain the gas absorption system.

It should be noted that the relationship between the second buffer structure 24 and the second liquid supply device is not limited to this, and may be adjusted according to the working condition and the use requirement. Optionally, the second buffer structure 24 communicates with a second liquid supply device to supply water into the second spraying structure 22 through the second liquid supply device, and water and impurities left from the second filler 21 are buffered in the second buffer structure 24 so as to enter the second spraying structure 22 again to continue spraying.

As shown in fig. 1, the cabinet 10 has a receiving chamber 13, the air inlet 11 communicates with the air outlet 12 through the receiving chamber 13, and the gas absorption assembly 30 is located in the receiving chamber 13. One gas inlet 11 and one gas pretreatment device 20; alternatively, the number of the gas inlets 11 is plural, the plurality of gas inlets 11 are disposed around the accommodation chamber 13, the number of the gas pretreatment devices 20 is plural, and the plurality of gas pretreatment devices 20 are disposed in one-to-one correspondence with the plurality of gas inlets 11. Like this, above-mentioned setting makes the number of air inlet 11 select more in a flexible way to satisfy different user demand and operating mode, also promoted staff's processing flexibility.

In this embodiment, the number of the air inlets 11 is two, two air inlets 11 are located on two sides of the accommodating cavity 13, the number of the gas pretreatment devices 20 is two, two gas pretreatment devices 20 and two air inlets 11 are arranged in a one-to-one correspondence manner, and each gas pretreatment device 20 is used for filtering impurities in air or flue gas entering from the corresponding air inlet 11, so as to ensure that all the air or flue gas entering the gas absorption system is filtered by the impurities, and avoid the influence on the CO2 capture efficiency of the gas absorption system caused by the accumulation of the impurities in the gas absorption system.

It should be noted that the number of the air inlets 11 is not limited to this, and may be adjusted according to the working condition and the use requirement. Alternatively, the air inlets 11 are three, and four, and five, and a plurality.

The number of the gas pretreatment devices 20 is not limited to this, and may be selected to match the number of the gas inlets 11.

As shown in fig. 1 and 3, the gas absorption system further includes a gas delivery device 40 and a first detection device. A gas conveying means 40 is provided at the gas outlet 12 and/or the gas inlet 11 for conveying gas out of the gas absorption system via the gas inlet 11. First detection means are arranged within the first buffer structure 34 for detecting the concentration of carbonate in the solution. Wherein, when the detection value of the first detection device reaches the first preset concentration value, the gas delivery device 40 is controlled to stop operating. In the operation process of the gas absorption system, if the detection value of the first detection device reaches a preset concentration value, the gas absorption system is judged to capture and absorb CO2 in air or flue gas; or the capture of CO2 by the alkaline solution is saturated, at which time the gas absorption system is controlled to stop exhausting or to replenish the alkaline solution.

Optionally, the gas conveying means 40 comprise a fan, which is arranged at the exhaust 12; and/or, the gas delivery device 40 includes a compressor disposed at the gas inlet. Thus, the fan can suck the gas which is completely absorbed in the gas absorption system out of the gas absorption system, so that the gas can smoothly flow in the gas absorption system. Meanwhile, the compressor is used for compressing the gas at the gas inlet into high-pressure gas and then enabling the high-pressure gas to enter the gas absorption system, so that the flow rate of the gas is increased, and the CO2 capture efficiency of the gas absorption system is improved.

In the present embodiment, the gas delivery device 40 comprises a fan disposed at the exhaust port 12.

Optionally, if the detection value of the first detection device reaches the preset concentration value, it is determined that the CO2 capturing and absorbing capacity of the alkaline solution in the first buffer structure 34 put into use cannot meet the use requirement of the gas absorption system, and at this time, the first buffer structure 34 put into use is replaced to improve the stability of the CO2 capturing and absorbing capacity of the gas absorption system.

Optionally, the gas absorption system further comprises a second detection device. Wherein, the second detecting device is disposed in the first buffer structure 34 for detecting the concentration of hydroxyl in the solution; and when the detection value of the second detection device is smaller than a second preset concentration value, controlling the first pump body 36 to start. In this way, when the detection value of the second detection device is smaller than the second preset concentration value, it is determined that the alkaline solution in the first buffer structure 34 is saturated and the CO2 capture efficiency cannot meet the use requirement, and at this time, the alkaline solution needs to be replenished into the first buffer structure 34 by the alkaline solution pump, and the replenishment is stopped until the detection value of the second detection device reaches the required value.

Optionally, the gas absorption assembly 30 further includes a first liquid level meter, the first liquid level meter is disposed in the first buffer structure 34 and used for detecting a height of the solution in the first buffer structure 34, when the liquid level is lower than a first level value, the first buffer structure 34 is replenished with water by a water replenishing pump, and when the liquid level reaches a preset liquid level, the water replenishment is stopped.

Optionally, the gas pretreatment device 20 further includes a second liquid level meter, the second liquid level meter is arranged in the second buffer structure 24 and is used for detecting the water level of the second buffer structure 24, when the liquid level is lower than the second liquid level value, the water is supplemented to the second buffer structure 24 by the water supplementing pump, and when the liquid level reaches the preset liquid level, the water supplementing is stopped.

As shown in fig. 1 and 3, the gas absorption system further includes an air duct 60 and a gear box 70. Wherein, the air duct 60 is connected to the casing 10 and located at the air outlet 12 for guiding the air exhausted from the air outlet. The gear box 70 is drivingly connected to the fan to drive the fan in operation.

In this embodiment, the total length of the gas absorption system is 5-20 m, and the air enters from one side, and the size of the air enters is 0.6 × 0.6-10 × 10m. The first buffer structure 34 is adjacent to the second buffer structure 24 and separated by concrete, and the first buffer structure 34 is internally treated with corrosion prevention.

Alternatively, there is one first filler 32; alternatively, the first packing 32 may be provided in plural numbers, and the plural first packings 32 may be provided at intervals along the longitudinal direction of the gas absorption system.

Optionally, one second filler 21; alternatively, the first packing 32 may be provided in plural, and the plural first packings 32 may be provided at intervals along the longitudinal direction of the gas absorption system.

Optionally, the spraying density of the first spraying structure 31 is 0-20 m ³ /m ² * h, and deionized water is used.

Optionally, the gas absorption system further comprises a water turbine and a generator. Wherein, the hydraulic turbine is located the below of first buffer structure 34, and the liquid that is located first buffer structure 34 flows to the hydraulic turbine through the water conservancy diversion inclined plane. The generator is connected with the water turbine. Therefore, in the operation process of the gas absorption system, the water turbine is driven to rotate by the liquid potential energy, and the power generation function of the generator is further realized, the generator can supply power to the first pump body 36 and the second pump body 26, so that the liquid potential energy is recycled, and the overall energy consumption of the gas absorption system is also reduced.

Optionally, the gas absorption system further comprises a stirring device. Wherein the stirring means is arranged within the first buffer structure 34. Thus, the above arrangement of the stirring device makes the mixing of the fresh water and the fresh lye more uniform.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the gas pretreatment device is arranged in the machine shell and is positioned at the gas inlet, and the gas absorption assembly is positioned at the downstream of the gas pretreatment device. Like this, in the gas absorption system operation in-process, air or flue gas get into gas absorption system via the air inlet and pass through gaseous preprocessing device earlier, gaseous preprocessing device filters the impurity in air or the flue gas, and then avoid above-mentioned impurity to pile up in gas absorption system, influence its absorption to carbon dioxide gas, entrapment efficiency in getting into the gas absorption subassembly even, the problem of impurity such as the solid particle that mix with in the air or the flue gas among the prior art easily accumulations in CO2 entrapment system has been solved, and then the operation of gas absorption system, the maintenance cost has been reduced. Meanwhile, the absorption of impurities in air or flue gas can also improve the purity of the solution formed after the chemical reaction of the alkaline solution and carbon dioxide gas, and reduce the cost of the post-treatment process.

It is to be understood that the above-described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (16)

1. A gas absorption system for absorbing carbon dioxide gas in an environment, the gas absorption system comprising:

a casing (10) having an air inlet (11) and an air outlet (12), the air inlet (11) communicating with the air outlet (12), the air outlet (12) being located above the air inlet (11);

a gas pre-treatment device (20), the gas pre-treatment device (20) being arranged inside the enclosure (10) at the gas inlet (11) for filtering impurities in the gas entering the gas inlet (11);

the gas absorption assembly (30) is arranged in the machine shell (10) and is positioned at the downstream of the gas pretreatment device (20), the gas absorption assembly (30) comprises a first liquid supply device and a first spraying structure (31), the first liquid supply device is communicated with the first spraying structure (31) and is used for providing alkaline solution, and the alkaline solution flowing out of the first spraying structure (31) and carbon dioxide gas in the gas are subjected to chemical reaction to absorb the carbon dioxide gas.

2. The gas absorption system according to claim 1, wherein the gas absorption assembly (30) further comprises:

a first packing (32) disposed opposite the exhaust port (12), the first packing (32) being located below the first shower structure (31);

and the first water collector (33) is positioned above the first spraying structure (31).

3. The gas absorption system according to claim 2, wherein the gas absorption assembly (30) further comprises:

a first buffer structure (34), wherein the first buffer structure (34) is positioned below the first filler (32) and is used for buffering the solution after the chemical reaction with the carbon dioxide gas is completed;

the two ends of the first pipeline (35) are respectively communicated with the first cache structure (34) and the first spraying structure (31);

a first pump body (36) arranged on the first pipeline (35) for pumping the solution entering the first buffer structure (34) into the first spraying structure (31).

4. The gas absorption system according to claim 1, wherein the gas pretreatment device (20) comprises:

a second filler (21) disposed opposite the air inlet (11);

a second liquid supply device;

and the second spraying structure (22) is positioned above the second filler (21), and the second liquid supply device is communicated with the second spraying structure (22).

5. The gas absorption system according to claim 4, wherein the gas pretreatment device (20) further comprises:

a second water collector (23) arranged opposite to the second filler (21); the number of the second water collectors (23) is one; or a plurality of second water collectors (23) are arranged, at least one second water collector (23) is positioned on the first side of the second filling material (21), and at least one second water collector (23) is positioned on the second side of the second filling material (21).

6. The gas absorption system according to claim 4, wherein the gas pretreatment device (20) further comprises:

a second buffer structure (24), the second buffer structure (24) being located below the second packing (21) for buffering liquid flowing out through the second packing (21);

the two ends of the second pipeline (25) are respectively communicated with the second spraying structure (22) and the second cache structure (24);

a second pump body (26) arranged on the second pipeline (25) for pumping the liquid entering the second buffer structure (24) into the second spraying structure (22).

7. The gas absorption system according to claim 6, wherein the second buffer structure (24) comprises:

a cache body;

the partition plate is arranged in the cache body to divide the inner cavity of the cache body into a first sub-containing cavity and a second sub-containing cavity, the first sub-containing cavity is positioned below the second filler (21), and the second sub-containing cavity is communicated with the second pipeline (25); the baffle plate is provided with an overflow hole or forms an overflow part between the baffle plate and the cache body, and the first sub-containing cavity is communicated with the second sub-containing cavity through the overflow hole or the overflow part.

8. The gas absorption system according to claim 4, wherein the second packing (21) comprises a plurality of sub-packing pieces, two adjacent sub-packing pieces are staggered and form a flow passage, and a flow disturbing protrusion or a flow disturbing recess is arranged on the surface of each sub-packing piece and positioned in the flow passage.

9. The gas absorption system according to claim 1, wherein the gas pretreatment device (20) is a filter screen or a filter membrane.

10. The gas absorption system according to claim 1, wherein the cabinet (10) has a housing chamber (13), the gas inlet (11) communicates with the gas outlet (12) through the housing chamber (13), and the gas absorption assembly (30) is located in the housing chamber (13); one gas inlet (11) and one gas pretreatment device (20); or, the air inlets (11) are multiple, the air inlets (11) are arranged around the accommodating cavity (13), the gas pretreatment devices (20) are multiple, and the gas pretreatment devices (20) and the air inlets (11) are arranged in a one-to-one correspondence manner.

11. The gas absorption system of claim 3 further comprising:

a gas delivery device (40), said gas delivery device (40) being arranged at said gas outlet (12) and/or said gas inlet (11) for delivering gas out of said gas absorption system via said gas inlet (11);

first detection means arranged within the first buffer structure (34) for detecting the concentration of carbonate in a solution; when the detection value of the first detection device reaches a first preset concentration value, the gas conveying device (40) is controlled to stop running.

12. The gas absorption system according to claim 11, wherein the gas delivery device (40) comprises:

a fan disposed at the exhaust port (12); and/or the presence of a gas in the gas,

and the compressor is arranged at the air inlet.

13. The gas absorption system according to claim 3, further comprising:

second detection means, provided within said first buffer structure (34), for detecting the concentration of hydroxyl in solution; and when the detection value of the second detection device is smaller than a second preset concentration value, controlling the first pump body (36) to start.

14. A gas absorption system according to claim 3 wherein the bottom surface of the first buffer structure (34) has a flow directing bevel.

15. The gas absorption system according to claim 14, further comprising:

the water turbine is positioned below the first buffer structure (34), and liquid in the first buffer structure (34) flows to the water turbine through the diversion inclined plane;

and the generator is connected with the water turbine.

16. The gas absorption system of claim 3 further comprising:

and the stirring device is arranged in the first buffer structure (34).

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