Recovery device

Abstract

The invention provides a recovery device. The recovery device comprises a shell provided with a recovery cavity, an air inlet and an air outlet, the air inlet is communicated with the air outlet through the recovery cavity, and the air inlet is located below the air outlet; the spraying assembly is arranged in the recycling cavity, the spraying assembly comprises at least two spraying structures which are oppositely arranged, and a washing space used for washing the gas to be washed is formed between the at least two spraying structures in a surrounding mode; wherein the number of the spraying assemblies is at least two, the spraying assemblies are arranged at intervals in the height direction of the shell, the spraying structure in at least one spraying assembly is provided with a water mist spray head used for spraying water mist into the washing space, and the spraying structure in at least the other spraying assembly is provided with a water curtain spray head used for spraying a water curtain into the washing space. And the water mist nozzle is positioned below the water curtain nozzle. The problem that in the prior art, a recycling device for recycling amine is poor in recycling effect is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of amine recovery, and in particular to a recovery device. Background Art

[0002] At present, carbon dioxide capture technology, as an emerging technology developed in recent years, can be used to remove carbon dioxide from industrial exhaust gas to reduce carbon emissions in industrial production processes.

[0003] In the prior art, the chemical absorption method that uses the chemical reaction between chemical reagents and carbon dioxide to capture carbon dioxide is the most mature technology for capturing carbon dioxide, and the amine-based carbon dioxide capture technology using amine solution as absorbent is the main method of carbon dioxide capture technology. However, amine is a volatile substance with low density, low boiling point and high vapor pressure. An important problem of the amine-based carbon dioxide capture technology is that part of the absorbent (amine) will be lost with the escape of flue gas, and the main pollutants emitted by the amine-based carbon dioxide chemical absorption system are actually amines entrained in the flue gas, gaseous amines based on volatility, and tiny amine droplets in the form of aerosols; among them, the tiny amine droplets in the form of aerosols are formed by the condensation of the gas phase amine vapor components in the amine absorbent, and are also the main form of amine escape. In order to avoid the economic loss and environmental pollution caused by amine escape, the recovery tower used for purifying flue gas is being improved in the prior art, such as by adding a spray device and a water washing device to remove the above-mentioned escaped amines in the flue gas as much as possible.

[0004] However, conventional spraying methods make it difficult to ensure that the spraying liquid can stably collide with tiny amine droplets in the form of aerosols and carry away the amine, and the recovery effect is still poor. Summary of the invention

[0005] The main purpose of the present invention is to provide a recovery device to solve the problem that the recovery effect of the recovery device used for recovering amine in the prior art is poor.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a recovery device, comprising: a shell, having a recovery chamber, an air inlet and an air outlet, the air inlet is connected to the air outlet through the recovery chamber, and the air inlet is located below the air outlet; a spray assembly, arranged in the recovery chamber, the spray assembly includes at least two spray structures arranged opposite to each other, and the at least two spray structures are surrounded to form a washing space for washing the gas to be washed; wherein, the spray assembly is at least two groups, and at least two groups of spray assemblies are arranged at intervals along the height direction of the shell, and the spray structure in at least one group of spray assemblies has a water mist nozzle for spraying water mist into the washing space, and the spray structure in at least another group of spray assemblies has a water curtain nozzle for spraying a water curtain into the washing space, and the water mist nozzle is located below the water curtain nozzle.

[0007] Furthermore, the recovery device also includes: a liquid supply structure, which is connected to the spray structure, and the liquid supply structure is used to supply washing liquid to the spray structure; wherein, there are at least two liquid supply structures, and at least two liquid supply structures are arranged in a one-to-one correspondence with at least two spray components, and the types of washing liquid supplied by the at least two liquid supply structures are different.

[0008] Furthermore, the spray assembly for spraying water mist is the first spray assembly, and the spray assembly for spraying water curtain is the second spray assembly. The first spray assembly is located below the second spray assembly. The spraying direction of the spray structure of the first spray assembly is set at a first angle A with the flow direction of the gas to be washed, and the first angle A satisfies: 90°≤A≤180°.

[0009] Furthermore, the recovery device also includes: a tubular guide structure, which is arranged between the spray assembly and the air inlet, and the tubular guide structure includes an air collecting section and a guide section that are interconnected. The air collecting section is located below the guide section, and the inner diameter of the air collecting section gradually decreases along the direction from the air inlet to the air outlet.

[0010] Furthermore, a flow gap H is provided between one end of the gas collecting section away from the guiding section and the cavity wall of the recovery cavity, and the flow gap H satisfies: 1 cm ≤ H ≤ 5 cm.

[0011] Furthermore, the projections of each spray structure on the tubular guide structure are all located within the gas collecting section of the tubular guide structure.

[0012] Furthermore, the shell also has a liquid outlet connected to the recovery chamber, and the liquid outlet is arranged on the bottom wall of the recovery chamber; wherein the bottom wall of the recovery chamber is an arc-shaped surface, and the arc-shaped surface protrudes toward a side away from the recovery chamber.

[0013] Furthermore, the recovery device also includes: a filtering structure, which is arranged between the air inlet and the liquid outlet, and the filtering structure is used to filter the liquid flowing to the liquid outlet.

[0014] Furthermore, the recovery device also includes: a driving device; a cleaning structure, which is movably arranged on the filtering structure; wherein the driving device is connected to the cleaning structure through a screw nut mechanism, so that when the driving device drives the cleaning structure to reciprocate along a preset direction, the filtering structure is cleaned.

[0015] Furthermore, the recovery device also includes: a control module; a detection device, which is arranged at the liquid outlet, and the detection device is used to detect the liquid flow at the liquid outlet; wherein the control module is connected to both the detection device and the driving device, and the control module controls at least one of the rotation speed or direction of the driving device according to the detection value of the detection device.

[0016] According to the technical solution of the present invention, the housing of the recovery device has a recovery chamber, an air inlet and an air outlet, the air inlet is connected to the air outlet through the recovery chamber, the air inlet is located below the air outlet, the spray assembly is arranged in the recovery chamber, the spray assembly includes at least two spray structures arranged opposite to each other, and the at least two spray structures surround to form a washing space for washing the gas to be washed. Among them, the spray assembly is at least two groups, and at least two groups of spray assemblies are arranged at intervals along the height direction of the housing, the spray structure in at least one group of spray assemblies has a water mist nozzle for spraying water mist into the washing space, and the spray structure in at least another group of spray assemblies has a water curtain nozzle for spraying a water curtain into the washing space, and the water mist nozzle is located below the water curtain nozzle. In this way, during the operation of the recovery device, the high-temperature flue gas introduced into the recovery chamber through the air inlet can spontaneously flow to the air outlet. Since the water mist nozzle is located below the water curtain nozzle, the tiny amine droplets entrained in the high-temperature flue gas can first collide with the mist-like washing liquid with a larger density and a smaller volume. After absorbing the washing liquid, the larger tiny amine droplets will further increase in volume and fall under the action of gravity. After absorbing the washing liquid, the smaller tiny amine droplets will also further increase in volume to increase the intensity of the collision between them and the water curtain-like washing liquid sprayed from the water curtain nozzle, thereby ensuring that most of the tiny amine droplets in the flue gas can be recovered, thereby solving the problem of poor recovery effect of the recovery device for recovering amines in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the overall structure of an embodiment of a recovery device according to the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Shell; 11. Recovery chamber; 12. Air inlet; 13. Air outlet; 14. Liquid outlet;

[0021] 20. Spray assembly; 21. Spray structure; 22. Washing space; 23. First spray assembly; 24. Second spray assembly;

[0022] 30. tubular guide structure; 31. gas collecting section; 32. guide section;

[0023] 40. Filtering structure; 50. Driving device; 60. Cleaning structure; 70. Detection device. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0026] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0027] In order to solve the problem of poor recovery effect of the recovery device for recovering amine in the prior art, the present application provides a recovery device.

[0028] like Figure 1 As shown, the recovery device includes: a housing 10 having a recovery chamber 11, an air inlet 12 and an air outlet 13, the air inlet 12 is connected to the air outlet 13 through the recovery chamber 11, and the air inlet 12 is located below the air outlet 13; a spray assembly 20 is arranged in the recovery chamber 11, and the spray assembly 20 includes at least two spray structures 21 arranged opposite to each other, and the at least two spray structures 21 surround to form a washing space 22 for washing the gas to be washed. Among them, the spray assembly 20 is at least two groups, and at least two groups of spray assemblies 20 are arranged at intervals along the height direction of the housing 10, and the spray structure 21 in at least one group of spray assemblies 20 has a water mist nozzle for spraying water mist into the washing space 22, and the spray structure 21 in at least another group of spray assemblies 20 has a water curtain nozzle for spraying a water curtain into the washing space 22, and the water mist nozzle is located below the water curtain nozzle.

[0029] The technical solution of this embodiment is applied, and the housing of the recovery device has a recovery chamber 11, an air inlet 12 and an air outlet 13. The air inlet 12 is connected to the air outlet 13 through the recovery chamber 11, and the air inlet 12 is located below the air outlet 13. The spray assembly 20 is arranged in the recovery chamber 11, and the spray assembly 20 includes at least two spray structures 21 arranged opposite to each other. The at least two spray structures 21 surround a washing space 22 for washing the gas to be washed. Among them, the spray assembly 20 is at least two groups, and at least two groups of spray assemblies are arranged at intervals along the height direction of the housing. The spray structure 21 in at least one group of spray assemblies 20 has a water mist nozzle for spraying water mist into the washing space, and the spray structure 21 in at least another group of spray assemblies 20 has a water curtain nozzle for spraying a water curtain into the washing space, and the water mist nozzle is located below the water curtain nozzle. In this way, during the operation of the recovery device, the high-temperature flue gas introduced into the recovery chamber 11 through the air inlet 12 can spontaneously flow to the air outlet 13. Since the water mist nozzle is located below the water curtain nozzle, the tiny amine droplets entrained in the high-temperature flue gas can first collide with the mist-like washing liquid with a larger density and a smaller volume. After absorbing the washing liquid, the larger tiny amine droplets will further increase in volume and fall under the action of gravity. After absorbing the washing liquid, the smaller tiny amine droplets will also further increase in volume to increase the intensity of the collision between them and the water curtain-like washing liquid sprayed from the water curtain nozzle, thereby ensuring that most of the tiny amine droplets in the flue gas can be recovered, thereby solving the problem of poor recovery effect of the recovery device for recovering amines in the prior art.

[0030] In this embodiment, there are four groups of spray assemblies 20 , and two groups of spray assemblies 20 are arranged opposite to the other two groups of spray assemblies 20 to surround and form a washing space 22 .

[0031] In this embodiment, a plurality of spray structures 21 are arranged in one group of spray assemblies 20, and a spray layer is actually formed between the spray structures 21 arranged relatively in two relatively arranged groups of spray assemblies 20, that is, a plurality of spray layers are actually formed in the recovery chamber 11, and the spray layers capture amine droplets in the flue gas layer by layer to maximize the recovery rate of amine.

[0032] Specifically, the two groups of spray assemblies 20 spray the washing liquid into the washing space 22 at the same time, which can further increase the density of the washing liquid in the washing space 22 to ensure that the amine droplets can stably collide with the washing liquid.

[0033] Specifically, the water curtain nozzle can spray a water curtain to further ensure that all amine droplets can collide with the cleaning liquid.

[0034] It should be noted that the difference between the water mist nozzle and the water curtain nozzle lies in the different nozzle structures of the two. The structures are relatively conventional and will not be elaborated here.

[0035] Optionally, the recovery device further includes a liquid supply structure, which is connected to the spray structure 21 and is used to supply washing liquid to the spray structure 21. There are at least two liquid supply structures, and the at least two liquid supply structures are arranged in a one-to-one correspondence with the at least two spray assemblies 20. The types of washing liquids supplied by the at least two liquid supply structures are different. In this way, liquids are supplied through multiple liquid supply structures, so that the multiple spray assemblies 20 can spray different types of washing liquids, further improving the recovery efficiency of amine.

[0036] In this embodiment, there are two liquid supply structures, and one liquid supply structure is connected to two spray assemblies 20 that are oppositely arranged.

[0037] Specifically, the specific structure of the liquid supply structure will not be described in detail here, and it can be formed by a simple composition of a box, a pipeline and a water pump.

[0038] Specifically, the washing liquid can be water or different types of acidic solutions.

[0039] In this embodiment, the spray assembly 20 for spraying water mist is the first spray assembly 23, and the spray assembly 20 for spraying water curtain is the second spray assembly 24. The first spray assembly 23 is located below the second spray assembly 24. The spray direction of the spray structure 21 of the first spray assembly 23 is set at a first angle A with the flow direction of the gas to be washed. The first angle A satisfies: 90°≤A≤180°. In this way, the above setting makes the spray direction of the mist washing liquid and the flow direction of the flue gas at an obtuse angle, so that the mist spray can collide more violently with the amine droplets in the flue gas. At the same time, the above setting can also slow down the flow speed of the flue gas through the mist spray, further ensuring that all amine droplets can collide with the washing liquid.

[0040] like Figure 1 As shown, the recovery device further includes a tubular guide structure 30, which is disposed between the spray assembly 20 and the air inlet 12. The tubular guide structure 30 includes a gas collection section 31 and a guide section 32 which are interconnected. The gas collection section 31 is located below the guide section 32. The inner diameter of the gas collection section 31 gradually decreases in the direction from the air inlet 12 to the air outlet 13. In this way, the tubular guide structure 30 can actually play the role of collecting the smoke and correcting the flow direction of the smoke, so as to further enhance the intensity of the collision between the smoke and the scrubbing liquid.

[0041] In this embodiment, the guide section 32 is a vertical pipe section.

[0042] In this embodiment, the gas collecting section 31 is a conical gas collecting hood.

[0043] Optionally, there is a flow gap H between the end of the gas collecting section 31 away from the guide section 32 and the cavity wall of the recovery chamber 11, and the flow gap H satisfies: 1cm≤H≤5cm. In this way, the washing liquid and amine droplets dropped on the tubular guide structure 30 can flow along the outer surface of the gas collecting section 31, and flow to the bottom of the tubular guide structure 30 through the flow gap, so as to avoid the accumulation of washing liquid and amine droplets between the tubular guide structure 30 and the cavity wall of the recovery chamber 11. At the same time, the above-mentioned setting makes the size of the flow gap H more appropriate, so as to ensure the smooth flow of washing liquid and amine droplets while preventing flue gas from flowing out through the flow gap H.

[0044] Specifically, there is actually a spray structure 21 above the flow gap. In fact, even if the two spray assemblies 20 are arranged opposite to each other, the sprayed cleaning liquid is difficult to spray between two adjacent spray structures 21 due to the structure of the spray structure 21. If the flue gas flows out through the flow gap, it is likely to flow along the gap between multiple spray structures 21. At this time, this part of the flue gas cannot be sprayed. The above-mentioned setting of the flow gap H ensures that most of the flow gap H can be filled with cleaning liquid and amine droplets to prevent the flue gas from flowing out through the flow gap.

[0045] In this embodiment, the projections of each spray structure 21 on the tubular guide structure 30 are all located in the gas collecting section 31 of the tubular guide structure 30. In this way, along the height direction of the shell, the flue gas guided by the tubular guide structure 30 can actually be staggered with the spray structures 21, so as to avoid the flue gas carrying amine droplets flowing between the spray structures 21, which causes the amine droplets in this part of the flue gas to be unable to be sprayed, and further improves the recovery effect of the recovery device.

[0046] In this embodiment, the housing 10 further has a liquid outlet 14 in communication with the recovery chamber 11, and the liquid outlet 14 is arranged on the bottom wall of the recovery chamber 11. The bottom wall of the recovery chamber 11 is an arc-shaped surface, and the arc-shaped surface protrudes toward the side away from the recovery chamber 11. In this way, the bottom wall of the recovery chamber 11 can actually form a guide surface to guide the amine droplets and washing liquid flowing to the bottom wall of the recovery chamber 11 to spontaneously flow to the liquid outlet 14 and finally flow out, thereby making the structure of the recovery device simpler.

[0047] In this embodiment, the recovery device further includes a filter structure 40, which is disposed between the air inlet 12 and the liquid outlet 14, and is used to filter the liquid flowing toward the liquid outlet 14. In this way, when the amine droplets and the washing liquid flow toward the bottom wall of the recovery chamber 11, the filter structure 40 can filter the impurities in the amine droplets and the washing liquid, so as to prevent the impurities from flowing into the subsequent device along with the amine droplets and the washing liquid, thereby causing damage to the subsequent device.

[0048] Optionally, the filter structure 40 is a filter screen.

[0049] In this embodiment, the recovery device further includes a driving device 50 and a cleaning structure 60, and the cleaning structure 60 is movably arranged on the filter structure 40. The driving device 50 is connected to the cleaning structure 60 by a screw nut mechanism, so that when the driving device 50 drives the cleaning structure 60 to reciprocate along a preset direction, the filter structure 40 is cleaned. In this way, the above arrangement can prevent impurities from clogging the filter structure 40 and affecting the flow process of amine droplets and washing liquid. At the same time, the driving device 50 can spontaneously drive the cleaning structure 60 to move, so as to realize the automatic cleaning of the filter structure 40 by the cleaning structure 60.

[0050] In this embodiment, the cleaning structure 60 is a cleaning steel brush.

[0051] Optionally, the driving device 50 is a servo motor, and the driving device 50 is connected to the cleaning structure 60 through a screw nut mechanism to drive the cleaning structure 60 to move.

[0052] In this embodiment, the recovery device further includes a control module and a detection device 70, wherein the detection device 70 is disposed at the liquid outlet 14, and the detection device 70 is used to detect the liquid flow rate at the liquid outlet 14. The control module is connected to both the detection device 70 and the drive device 50, and the control module controls at least one of the rotation speed or the direction of the drive device 50 according to the detection value of the detection device 70. In this way, the control module can spontaneously control the movement of the drive device 50 according to the detection value of the detection device 70, so as to realize automatic and timely cleaning of the cleaning structure 60, thereby improving the intelligence of the recovery device.

[0053] In this embodiment, the detection device 70 is a flow sensor.

[0054] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0055] The shell of the recovery device has a recovery chamber, an air inlet and an air outlet. The air inlet is connected to the air outlet through the recovery chamber. The air inlet is located below the air outlet. The spray assembly is arranged in the recovery chamber. The spray assembly includes at least two spray structures arranged opposite to each other. The at least two spray structures surround to form a washing space for washing the gas to be washed. Among them, the spray assembly is at least two groups. The at least two groups of spray assemblies are arranged at intervals along the height direction of the shell. The spray structure in at least one group of spray assemblies has a water mist nozzle for spraying water mist into the washing space. The spray structure in at least another group of spray assemblies has a water curtain nozzle for spraying a water curtain into the washing space. The water mist nozzle is located below the water curtain nozzle. In this way, during the operation of the recovery device, the high-temperature flue gas introduced into the recovery chamber through the air inlet can spontaneously flow to the air outlet. Since the water mist nozzle is located below the water curtain nozzle, the tiny amine droplets entrained in the high-temperature flue gas can first collide with the mist-like washing liquid with a larger density and a smaller volume. After absorbing the washing liquid, the larger tiny amine droplets will further increase in volume and fall under the action of gravity. After absorbing the washing liquid, the smaller tiny amine droplets will also further increase in volume to increase the intensity of the collision between them and the water curtain-like washing liquid sprayed from the water curtain nozzle, thereby ensuring that most of the tiny amine droplets in the flue gas can be recovered, thereby solving the problem of poor recovery effect of the recovery device for recovering amines in the prior art.

[0056] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A recovery device, characterized in that: include: A housing (10) having a recovery chamber (11), an air inlet (12) and an air outlet (13), wherein the air inlet (12) is connected to the air outlet (13) through the recovery chamber (11), and the air inlet (12) is located below the air outlet (13); A spray assembly (20) is arranged in the recovery chamber (11), the spray assembly (20) comprising at least two spray structures (21) arranged opposite to each other, and a washing space (22) for washing the gas to be washed is formed by surrounding the at least two spray structures (21); The spray assemblies (20) are at least two groups, and the at least two groups of the spray assemblies (20) are spaced apart along the height direction of the shell (10). The spray structure (21) in at least one group of the spray assemblies (20) has a water mist nozzle for spraying water mist into the washing space (22), and the spray structure (21) in at least another group of the spray assemblies (20) has a water curtain nozzle for spraying a water curtain into the washing space (22), and the water mist nozzle is located below the water curtain nozzle.

2. The recovery device according to claim 1, characterized in that: The recovery device also includes: a liquid supply structure, connected to the spray structure (21), the liquid supply structure being used to supply washing liquid to the spray structure (21); There are at least two liquid supply structures, and at least two of the liquid supply structures are arranged in a one-to-one correspondence with at least two of the spray assemblies (20). The types of washing liquids supplied by the at least two liquid supply structures are different.

3. The recovery device according to claim 2, characterized in that: The spray assembly (20) for spraying water mist is a first spray assembly (23), and the spray assembly (20) for spraying a water curtain is a second spray assembly (24), the first spray assembly (23) is located below the second spray assembly (24), and the spray direction of the spray structure (21) of the first spray assembly (23) is arranged at a first angle A with the flow direction of the gas to be cleaned, and the first angle A satisfies: 90°≤A≤180°.

4. The recovery device according to claim 1, characterized in that: The recovery device also includes: A tubular guide structure (30) is arranged between the spray assembly (20) and the air inlet (12), and the tubular guide structure (30) comprises an air collecting section (31) and a guide section (32) which are interconnected. The air collecting section (31) is located below the guide section (32), and the inner diameter of the air collecting section (31) gradually decreases in the direction from the air inlet (12) to the air outlet (13).

5. The recovery device according to claim 4, characterized in that: A flow gap H is provided between one end of the gas collecting section (31) away from the guide section (32) and the cavity wall of the recovery cavity (11), and the flow gap H satisfies: 1 cm ≤ H ≤ 5 cm.

6. The recovery device according to claim 4, characterized in that: The projections of each of the spray structures (21) on the tubular guide structure (30) are all located within the gas collecting section (31) of the tubular guide structure (30).

7. The recovery device according to claim 1, characterized in that: The housing (10) further comprises a liquid outlet (14) communicating with the recovery chamber (11); the liquid outlet (14) is arranged on the bottom wall of the recovery chamber (11); Wherein, the bottom wall of the recovery chamber (11) is an arc-shaped surface, and the arc-shaped surface is convex toward a side away from the recovery chamber (11).

8. The recovery device according to claim 7, characterized in that: The recovery device also includes: A filter structure (40) is arranged between the air inlet (12) and the liquid outlet (14), and the filter structure (40) is used to filter the liquid flowing toward the liquid outlet (14).

9. The recovery device according to claim 8, characterized in that: The recovery device also includes: A driving device (50); A cleaning structure (60) movably disposed on the filtering structure (40); The driving device (50) is drivingly connected to the cleaning structure (60) via a screw-nut mechanism, so that when the driving device (50) drives the cleaning structure (60) to reciprocate in a preset direction, the filtering structure (40) is cleaned.

10. The recovery device according to claim 9, characterized in that: The recovery device also includes: Control module; a detection device (70) disposed at the liquid outlet (14), the detection device (70) being used to detect the liquid flow at the liquid outlet (14); The control module is connected to both the detection device (70) and the drive device (50), and the control module controls at least one of the rotation speed or the direction of rotation of the drive device (50) according to the detection value of the detection device (70).

Images