absorption column

Abstract

The application provides an absorption tower, which comprises a tower body, a reaction cavity, a flue gas inlet arranged at the lower end of the tower body, and a flue gas outlet arranged at the upper end of the tower body; an absorption part arranged in the reaction cavity; a cleaning part arranged in the reaction cavity, the cleaning part being arranged above the absorption part, the inlet of the cleaning part being communicated with the absorption part to clean the gas; and a separation part arranged in the reaction cavity, the separation part being arranged above the absorption part, the separation part being provided with a first gas inlet, a first gas outlet and a first liquid outlet, the first gas inlet being communicated with the outlet of the cleaning part, the first gas outlet being communicated with the flue gas outlet, and the first liquid outlet being communicated with the outside of the tower body. The technical scheme provided by the application can solve the problem that in the related art, the absorbent is introduced into the carbon dioxide absorption tower, the absorbent is mixed with the flue gas, and part of the absorbent is discharged into the air along with the flue gas to cause air pollution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to an absorption tower. BACKGROUND

[0002] The carbon dioxide absorption tower is a device used in industrial processes. Due to the large amount of carbon dioxide emissions, global warming has become a problem. Therefore, it is necessary to capture carbon dioxide in flue gas to reduce carbon emissions.

[0003] In the related art, the amine absorption method is the most mature and widely used carbon capture technology. Amine molecules react with carbon dioxide in the absorption tower, absorbing carbon dioxide in the raw material gas. The decarburized flue gas is discharged from the top of the absorption tower. In the absorption tower, the gas mixture and the liquid absorbent are countercurrently contacted in the tower. Carbon dioxide is dissolved or chemically reacts with the liquid to be absorbed. This process can be achieved by physical absorption or chemical absorption, which not only helps to reduce greenhouse gas emissions, but also improves resource recovery and recycling.

[0004] However, in the related art, the absorbent is introduced into the carbon dioxide absorption tower, and the absorbent is mixed with the flue gas. Part of the absorbent will be discharged into the air with the flue gas, causing air pollution, and also causing absorbent loss. SUMMARY

[0005] The present application provides an absorption tower to solve the problem of introducing absorbent into the carbon dioxide absorption tower in the related art, mixing the absorbent with the flue gas, and part of the absorbent being discharged into the air with the flue gas, causing air pollution.

[0006] The present application provides an absorption tower, which comprises: a tower body having a reaction cavity arranged vertically, a flue gas inlet connected to the reaction cavity at the lower end of the tower body, and a flue gas outlet connected to the reaction cavity at the upper end of the tower body; an absorption part arranged in the reaction cavity, the absorption part being located above the flue gas inlet; a cleaning part arranged in the reaction cavity, the cleaning part being located above the absorption part, the inlet of the cleaning part being connected to the absorption part to clean the gas; a separation part arranged in the reaction cavity, the separation part being located above the absorption part, the separation part having a first gas inlet, a first gas outlet and a first liquid outlet, the first gas inlet being connected to the outlet of the cleaning part, the first gas outlet being connected to the flue gas outlet, and the first liquid outlet being connected to the outside of the tower body.

[0007] Further, the separation part comprises a gas-liquid separation cylinder and a plurality of gas-liquid separators arranged in a containing cavity of the gas-liquid separation cylinder, the first gas inlet, the first gas outlet and the first liquid outlet are arranged on the gas-liquid separation cylinder, each gas-liquid separator has a second gas inlet, a second gas outlet and a second liquid outlet, the second gas inlet is in communication with the first gas inlet, the second liquid outlet is in communication with the first liquid outlet, and the second gas outlet is in communication with the first gas outlet.

[0008] Further, the cleaning part surrounds the outer periphery of the separation part.

[0009] Further, the absorption tower further comprises a fixing plate arranged between the absorption part and the separation part, an outer edge of the fixing plate is connected to an inner side wall of the tower body, the gas-liquid separation cylinder is arranged on the fixing plate, the fixing plate is provided with a communication hole corresponding to the outer periphery of the separation part to communicate the absorption part and the cleaning part.

[0010] Further, the cleaning part comprises a sealing plate, a first communication pipe and a plurality of first spray heads, the sealing plate is arranged above the first gas inlet, an outer edge of the sealing plate is connected to the inner side wall of the tower body, an inner edge of the sealing plate is connected to an outer side wall of the gas-liquid separation cylinder, the plurality of first spray heads are arranged on the sealing plate in a spaced manner, one end of the first communication pipe is in communication with the plurality of first spray heads, and the other end of the first communication pipe penetrates the tower body and is in communication with an external water source.

[0011] Further, the sealing plate has a ring structure; and / or, the upper surface of the fixing plate is provided with a communication groove in communication with the outside of the tower body.

[0012] Further, the absorption tower further comprises a second spray head and a second communication pipe, the second spray head is arranged above the absorption part in a spaced manner, a first end of the second communication pipe is in communication with the second spray head, and a second end of the second communication pipe is in communication with the absorbent storage tank.

[0013] Further, the absorption part has a honeycomb structure; and the absorption part is made of stainless steel.

[0014] Further, a lower end of the gas-liquid separation cylinder is provided with a drain port, and the absorption tower further comprises a third communication pipe, a first end of the third communication pipe is in communication with the drain port, and a second end of the third communication pipe is in communication with the first liquid outlet.

[0015] Further, the absorption tower further comprises a plurality of fourth communication pipes, a first end of each fourth communication pipe is in communication with the second gas inlet of the corresponding gas-liquid separator, and a second end of each fourth communication pipe is in communication with the first gas inlet.

[0016] The technical scheme of the present application is applied to the absorption tower, which comprises a tower body, an absorption part, a cleaning part and a separation part arranged in the reaction cavity of the tower body, and the reaction cavity is arranged vertically, so that the generated flue gas can be introduced into the reaction cavity of the tower body, the carbon dioxide in the flue gas can be absorbed, the absorption tower can be used to absorb the carbon dioxide in the flue gas, and then the clean flue gas is discharged through the reaction tower. Specifically, the flue gas inlet is arranged at the lower end of the tower body, and then the flue gas is discharged into the reaction cavity through the flue gas inlet, the flue gas outlet is arranged at the upper end of the tower body, and then the flue gas in which the carbon dioxide is absorbed is discharged from the absorption tower through the flue gas outlet, wherein the absorption part is arranged in the reaction cavity in the tower body, the absorption part is arranged above the flue gas inlet, and then the absorption part is used to absorb the carbon dioxide in the flue gas, the cleaning part is arranged above the absorption part, the inlet of the cleaning part is communicated with the absorption part, so that the flue gas after absorbing the carbon dioxide can be cleaned, the absorbent in the absorption part is cleaned through the cleaning part, the absorbent mixed in the flue gas is prevented from being discharged into the outside environment to cause environmental pollution, the separation part is arranged in the reaction cavity and arranged above the absorption part, the first gas inlet of the separation part is communicated with the outlet of the cleaning part, and then the cleaned flue gas is discharged into the separation part through the first gas inlet, the separation part is used to separate the cleaned flue gas into gas and liquid, the separated pure gas is discharged into the flue gas inlet through the first gas outlet, and the separated liquid is communicated with the outside of the tower body through the first liquid outlet. In this way, the carbon dioxide in the flue gas is absorbed by the absorption part, then the flue gas after absorbing the carbon dioxide is cleaned by the cleaning part, the absorbent in the flue gas is cleaned, the cleaned flue gas is discharged into the separation part to realize gas-liquid separation, so that the discharged flue gas is pure flue gas, the absorption tower can absorb and treat the flue gas, and the practicality of the absorption tower is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the application, and together with the description of the application, explain the application. The drawings provided in the application are used to explain the illustrative embodiments of the application and the description thereof, and do not constitute an improper limitation of the application. In the drawings:

[0018] Figure 1 A schematic diagram of the absorption tower provided by the embodiment of the present application is shown.

[0019] In the above drawings, the following reference signs are used:

[0020] 10, tower body; 11, flue gas inlet; 12, flue gas outlet;

[0021] 20, absorption part;

[0022] 30, cleaning part;

[0023] 40, separation part; 41, gas-liquid separation cylinder; 42, gas-liquid separator;

[0024] 50. The fixed plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative in nature and by no means as any limitation to the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without any creative work are within the scope of protection of the present application.

[0026] As shown in Figure 1 The present embodiment provides an absorption tower, which comprises a tower body 10, an absorption part 20, a cleaning part 30 and a separation part 40. The tower body 10 has a reaction cavity arranged vertically. A flue gas inlet 11 is arranged at the lower end of the tower body 10 and communicates with the reaction cavity. A flue gas outlet 12 is arranged at the upper end of the tower body 10 and communicates with the reaction cavity. The absorption part 20 is arranged in the reaction cavity and is located above the flue gas inlet 11. The cleaning part 30 is arranged in the reaction cavity and is located above the absorption part 20. The inlet of the cleaning part 30 communicates with the absorption part 20 to clean the gas. The separation part 40 is arranged in the reaction cavity and is located above the absorption part 20. The separation part 40 has a first gas inlet, a first gas outlet and a first liquid outlet. The first gas inlet communicates with the outlet of the cleaning part 30. The first gas outlet communicates with the flue gas outlet 12. The first liquid outlet communicates with the outside of the tower body 10.

[0027] The absorption tower provided by the embodiment comprises a tower body 10 and an absorption part 20, a cleaning part 30 and a separation part 40 arranged in the reaction cavity of the tower body 10. The reaction cavity is arranged vertically, so that the generated flue gas can be introduced into the reaction cavity of the tower body 10, the carbon dioxide in the flue gas can be absorbed, the absorption tower can be used to absorb the carbon dioxide in the flue gas, and then the clean flue gas is discharged through the reaction tower. Specifically, the flue gas inlet 11 is arranged at the lower end of the tower body 10, and then the flue gas is discharged into the reaction cavity through the flue gas inlet 11. The flue gas outlet 12 is arranged at the upper end of the tower body 10, and then the flue gas in which the carbon dioxide is absorbed in the reaction cavity is discharged from the absorption tower through the flue gas outlet 12. The absorption part 20 is arranged in the reaction cavity in the tower body 10, and the absorption part 20 is located above the flue gas inlet 11. Then, the absorption part 20 is used to absorb the carbon dioxide in the flue gas. The cleaning part 30 is arranged above the absorption part 20, and the inlet of the cleaning part 30 is communicated with the absorption part 20. In this way, the flue gas after absorbing the carbon dioxide can be cleaned, the absorbent of the absorption part 20 is cleaned through the cleaning part 30, the absorbent mixed in the flue gas is prevented from being discharged into the outside environment to cause environmental pollution, and the separation part 40 is arranged in the reaction cavity. The first gas inlet of the separation part 40 is communicated with the outlet of the cleaning part 30, and then the cleaned flue gas is discharged into the separation part 40 through the first gas inlet. The separation part 40 is used to separate the cleaned flue gas into gas and liquid. The pure gas after separation is discharged into the flue gas inlet 11 through the first gas outlet, and the liquid after separation is communicated with the outside of the tower body 10 through the first liquid outlet. In this way, the carbon dioxide in the flue gas is absorbed by the absorption part 20, and then the flue gas after absorbing the carbon dioxide is cleaned by the cleaning part 30. The absorbent in the flue gas is cleaned, the cleaned flue gas is discharged into the separation part 40 to realize gas-liquid separation, so that the discharged flue gas is pure flue gas, the absorption tower can absorb and treat the flue gas, and the practicability of the absorption tower is improved.

[0028] As Figure 1As shown, the separation part 40 comprises a gas-liquid separation cylinder 41 and a plurality of gas-liquid separators 42 arranged in the accommodating cavity of the gas-liquid separation cylinder 41. The first gas inlet, the first gas outlet and the first liquid outlet are arranged on the gas-liquid separation cylinder 41. Each gas-liquid separator 42 has a second gas inlet, a second gas outlet and a second liquid outlet. The second gas inlet is communicated with the first gas inlet. The second liquid outlet is communicated with the first liquid outlet. The second gas outlet is communicated with the first gas outlet. With the above structure, the gas-liquid separation cylinder 41 is provided with a plurality of gas-liquid separators 42. The second gas inlet of each gas-liquid separator 42 is communicated with the first gas inlet of the gas-liquid separation cylinder 41. In this way, the cleaned flue gas can be discharged into the plurality of gas-liquid separators 42. The second liquid outlet of each gas-liquid separator 42 is communicated with the first liquid outlet. In this way, the liquid separated by the gas-liquid separator 42 can be discharged to the outside through the second liquid outlet and the first liquid outlet. The gas separated by the gas-liquid separator 42 can be discharged to the outside through the second gas outlet and the first gas outlet. Thus, the separation part 40 can be used for gas-liquid separation.

[0029] It should be noted that the gas-liquid separator 42 is provided with a spiral channel and an exhaust pipe. The inlet of the spiral channel is located above the outlet of the spiral channel. The outlet of the exhaust pipe is located above the inlet of the exhaust pipe. The inlet of the spiral channel is communicated with the second gas inlet. The outlet of the spiral channel is communicated with the inlet of the exhaust pipe. The outlet of the exhaust pipe is communicated with the second gas outlet.

[0030] As shown in Figure 1 The washing part 30 is arranged around the outer periphery of the separation part 40. By arranging the washing part 30 around the outer periphery of the separation part 40, the utilization rate of the reaction cavity of the tower body main part 10 can be improved, the height of the tower body main part 10 can be reduced, and the production cost can be reduced.

[0031] As shown in Figure 1 The absorption tower further comprises a fixing plate 50 arranged between the absorption part 20 and the separation part 40. The outer edge of the fixing plate 50 is connected with the inner side wall of the tower body main part 10. The gas-liquid separation cylinder 41 is arranged on the fixing plate 50. The fixing plate 50 is provided with a communication hole corresponding to the outer periphery of the separation part 40, so as to communicate the absorption part 20 with the washing part 30. With the above structure, the fixing plate 50 is arranged between the absorption part 20 and the separation part 40. The gas-liquid separation cylinder 41 is arranged on the fixing plate 50. The fixing plate 50 is provided with a communication hole. Thus, the absorption part 20 and the washing part 30 can be communicated. The flue gas in the absorption part 20 can be discharged into the washing part 30 through the communication hole. The fixing plate 50 can support and fix the gas-liquid separation cylinder 41. The absorption part 20 and the washing part 30 can be communicated through the communication hole.

[0032] In the embodiment, the cleaning part 30 comprises a sealing plate, a first communication pipe and a plurality of first spray heads. The sealing plate is located above the first air inlet. The outer edge of the sealing plate is connected with the inner side wall of the tower body 10. The inner edge of the sealing plate is connected with the outer side wall of the gas-liquid separation cylinder 41. The plurality of first spray heads are arranged on the sealing plate in a spaced manner. One end of the first communication pipe is connected with the plurality of first spray heads. The other end of the first communication pipe penetrates the tower body 10 and is connected with an external water source. By adopting the above structure, the sealing plate is arranged above the first air inlet. The plurality of first spray heads and the communication pipe are arranged on the sealing plate. Then, the plurality of first spray heads on the sealing plate can be connected with the external water source through the communication pipe. Thus, the smoke can be washed by spraying.

[0033] In the embodiment, the sealing plate is in a ring shape. By adopting the above structure, the sealing plate can be arranged in the reaction cavity.

[0034] In the embodiment, the upper surface of the fixed plate 50 is provided with a communication groove. The communication groove is connected with the outside of the tower body 10. By arranging the communication groove on the fixed plate 50, the liquid can be discharged to the outside of the tower body 10 through the communication groove after the smoke is washed by spraying.

[0035] In the embodiment, the absorption tower further comprises a second spray head and a second communication pipe. The second spray head is arranged above the absorption part 20 in a spaced manner. The first end of the second communication pipe is connected with the second spray head. The second end of the second communication pipe is connected with the absorbent storage tank. By adopting the above structure, the second spray head and the second communication pipe are arranged in the absorption tower. The first end of the second communication pipe is connected with the second spray head. The second end of the second communication pipe is connected with the absorbent storage tank. Then, the absorbent in the absorbent storage tank is discharged to the second spray head through the second communication pipe. The absorbent is sprayed into the absorption part through the second spray head. Thus, the carbon dioxide in the smoke can be absorbed.

[0036] In the embodiment, the absorption part 20 is in a honeycomb shape. By adopting the above absorption part 20, the contact area between the absorbent and the smoke can be increased. The absorption effect of the absorption part 20 on the carbon dioxide can be improved.

[0037] In the embodiment, the absorption part 20 is made of stainless steel. By making the absorption part 20 of stainless steel, the structural strength of the absorption part 20 can be improved.

[0038] In the embodiment, the lower end of the gas-liquid separation cylinder 41 is provided with a drainage port, and the absorption tower further comprises a third communication pipe, a first end of the third communication pipe is communicated with the drainage port, and a second end of the third communication pipe is communicated with the first liquid outlet. By adopting the above structure, the liquid can be discharged through the drainage port.

[0039] In the embodiment, the absorption tower further comprises a plurality of fourth communication pipes, a first end of each fourth communication pipe is communicated with the second gas inlet of the corresponding gas-liquid separator 42, and a second end of each fourth communication pipe is communicated with the first gas inlet. By adopting the above structure, the second gas inlet of the gas-liquid separator 42 is communicated with the first gas inlet through the fourth communication pipe, so that the gas can be discharged conveniently.

[0040] It is to be 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 in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0041] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of illustration and description only and not to limit the scope of the application. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus should be considered as being part of the specification. In the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation of the generality of the examples. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the several views of the drawings and that, unless otherwise indicated, like elements in different views are essentially the same except for differences that are functionally clear.

[0042] In the description of the application, it should be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0043] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0044] In addition, it should be noted that the use of "first", "second" and the like to define parts only facilitates the differentiation of corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the application.

[0045] The above only describes the preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. An absorption tower, characterized in that, The absorption tower includes: The tower body (10) has a reaction chamber arranged vertically. The lower end of the tower body (10) is provided with a flue gas inlet (11) connected to the reaction chamber, and the upper end of the tower body (10) is provided with a flue gas outlet (12) connected to the reaction chamber. An absorption section (20) is disposed inside the reaction chamber, and the absorption section (20) is located above the flue gas inlet (11); A cleaning section (30) is provided inside the reaction chamber. The cleaning section (30) is located above the absorption section (20). The inlet of the cleaning section (30) is connected to the absorption section (20) to clean the gas. A separation section (40) is disposed in the reaction chamber. The separation section (40) is located above the absorption section (20). The separation section (40) has a first air inlet, a first exhaust outlet and a first liquid outlet. The first air inlet is connected to the outlet of the cleaning section (30). The first exhaust outlet is connected to the flue gas outlet (12). The first liquid outlet is connected to the outside of the tower body (10). The separation section (40) includes a gas-liquid separation cylinder (41) and a plurality of gas-liquid separators (42) disposed in the receiving cavity of the gas-liquid separation cylinder (41). The first air inlet, the first exhaust outlet and the first liquid outlet are all disposed on the gas-liquid separation cylinder (41). Each gas-liquid separator (42) has a second air inlet, a second exhaust outlet and a second liquid outlet. The second air inlet is connected to the first air inlet, the second liquid outlet is connected to the first liquid outlet and the second exhaust outlet is connected to the first exhaust outlet. The cleaning section (30) is disposed around the outer periphery of the separation section (40); The absorption tower also includes a fixing plate (50), which is disposed between the absorption section (20) and the separation section (40). The outer edge of the fixing plate (50) is connected to the inner wall of the tower body (10). The gas-liquid separation cylinder (41) is disposed on the fixing plate (50). The fixing plate (50) is provided with a connecting hole, which corresponds to the outer periphery of the separation section (40) to connect the absorption section (20) and the cleaning section (30).

2. The absorption tower according to claim 1, characterized in that, The cleaning section (30) includes a sealing plate, a first connecting pipe and a plurality of first nozzles. The sealing plate is located above the first air inlet. The outer edge of the sealing plate is connected to the inner wall of the tower body (10). The inner edge of the sealing plate is connected to the outer wall of the gas-liquid separator (41). The plurality of first nozzles are spaced apart on the sealing plate. One end of the first connecting pipe is connected to the plurality of first nozzles. The other end of the first connecting pipe extends out of the tower body (10) and is connected to an external water source.

3. The absorption tower according to claim 2, characterized in that, The sealing plate has a ring structure; and / or, A connecting groove is provided on the upper surface of the fixing plate (50), and the connecting groove is connected to the outside of the tower body (10).

4. The absorption tower according to claim 1, characterized in that, The absorption tower also includes a second nozzle and a second connecting pipe. The second nozzle is spaced above the absorption section (20). The first end of the second connecting pipe is connected to the second nozzle, and the second end of the second connecting pipe is connected to the absorbent storage tank.

5. The absorption tower according to claim 4, characterized in that, The absorption section (20) has a honeycomb structure; The absorption section (20) is made of stainless steel.

6. The absorption tower according to claim 1, characterized in that, The lower end of the gas-liquid separator (41) is provided with a drain outlet. The absorption tower also includes a third connecting pipe. The first end of the third connecting pipe is connected to the drain outlet, and the second end of the third connecting pipe is connected to the first liquid outlet.

7. The absorption tower according to claim 1, characterized in that, The absorption tower also includes a plurality of fourth connecting pipes, the first end of each fourth connecting pipe being connected to the second air inlet of the corresponding gas-liquid separator (42), and the second end of each fourth connecting pipe being connected to the first air inlet.

Images