Multi-stage tail gas purifier

Abstract

The utility model belongs to the technical field of tail gas treatment, and particularly relates to a multi-stage tail gas purifier which comprises a closed shell, a mandrel, a reaction chamber, a tail gas flow channel structure and a liquid flow channel structure. The plurality of reaction chambers are arranged in the closed shell along the axis direction of the mandrel, and a rotor is arranged in each reaction chamber; the liquid flow channel structure enables the reaction liquid to enter the rotor and be thrown out to the reaction chamber after being accelerated by the rotor; and the tail gas flow channel structure and the liquid flow channel structure enable the tail gas flow direction and the liquid flow direction in each reaction chamber to react in the reaction chamber in opposite directions. According to the utility model, the tail gas flow direction and the liquid flow direction in each reaction chamber are opposite, namely the tail gas flows clockwise, the liquid flows anticlockwise or the tail gas flows anticlockwise and the liquid flows clockwise, so that the liquid and the tail gas thrown out at a high speed can violently collide and react in the reaction chamber, and the reaction efficiency can be improved; and the tail gas is purified more thoroughly.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas treatment technology, and in particular relates to a multi-stage exhaust gas purifier. Background Technology

[0002] Hypergravity technology is an innovative technique for enhancing gas-liquid mass transfer processes. It utilizes the hypergravity environment to increase the specific surface area of ​​gas-liquid contact and reduce mass transfer resistance, thereby increasing the gas-liquid mass transfer rate and reducing reactor volume. The main mechanism of hypergravity technology involves the formation of tiny droplets, films, and filaments of liquid on the surface and in the pores of the packing material under centrifugal accelerations hundreds to thousands of times higher than Earth's gravitational field. This liquid flows radially from the inside out, increasing the specific surface area of ​​gas-liquid contact and improving the mass transfer coefficient due to microscopic mixing. Generally, compared to traditional gas-liquid contact devices, hypergravity reactors can increase the mass transfer rate per unit volume by tens to hundreds of times, while significantly reducing the reactor's equipment volume.

[0003] However, conventional rotating packed bed reactors are all single-layer rotating packed bed devices. Under the same surface exhaust gas velocity and surface liquid velocity, improving the mass transfer effect between gas and liquid usually requires increasing the size of the rotating packed bed. However, an excessively large rotation radius will cause mechanical stress on the spindle and bearings, making them prone to damage. Therefore, the application of single-layer rotating packed bed devices is limited. If a multi-layer counter-current rotating packed bed could be developed, its gas-liquid mass transfer area could be significantly increased, thereby improving the mass transfer efficiency.

[0004] For example, in a multi-layer counter-current rotary packed bed with patent number CN104436736A, exhaust gas enters the packed bed from the bottom, and liquid enters the packed bed from the top and collides and reacts with the exhaust gas through multiple reaction chambers. This method can improve the efficiency of mass transfer. However, since the exhaust gas and liquid flow in the reaction chambers in the same direction, the intensity of the collision between the exhaust gas and liquid needs to be improved. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a multi-stage exhaust gas purifier that achieves the effect of making the exhaust gas flow direction and liquid flow direction opposite in each reaction chamber, causing the high-speed ejected liquid and exhaust gas to collide and react violently in the reaction chamber, thereby improving reaction efficiency and making the exhaust gas purification more thorough.

[0006] In view of this, the present invention provides a multi-stage exhaust gas purifier, comprising:

[0007] A sealed housing, the sealed housing including a liquid outlet, an exhaust gas inlet, and an exhaust gas outlet;

[0008] A mandrel, which penetrates the sealed housing;

[0009] The reaction chambers are at least three in number, and multiple reaction chambers are arranged in a sealed shell along the axis of the spindle. Each reaction chamber is equipped with a rotor.

[0010] The tail gas flow channel structure has a tail gas inlet and a tail gas outlet at its two ends, which allow the tail gas to enter each reaction chamber from bottom to top.

[0011] A liquid flow channel structure, wherein the liquid flow channel structure allows the reaction liquid to enter the rotor and be accelerated by the rotor before being thrown out into the reaction chamber;

[0012] The tail gas flow channel structure and the liquid flow channel structure enable the tail gas flow direction and the liquid flow direction in each reaction chamber to react in opposite directions within the reaction chamber.

[0013] In this technical solution, by making the exhaust gas flow direction and the liquid flow direction opposite in each reaction chamber, that is, the exhaust gas flows clockwise and the liquid flows counterclockwise or the exhaust gas flows counterclockwise and the liquid flows clockwise, the liquid and exhaust gas thrown out at high speed will collide and react violently in the reaction chamber, which can improve the reaction efficiency and make the exhaust gas purification more thorough.

[0014] Furthermore, the exhaust gas flow channel structure includes:

[0015] The exhaust vents are provided on the upper top plate and lower bottom plate of each reaction chamber, and the two exhaust vents are staggered.

[0016] Each reaction chamber has a baffle fixedly installed between its upper top plate and lower bottom plate. The upper and lower ends of the baffle are fixedly connected to the upper top plate and the lower bottom plate, and the left and right ends extend to the inner wall of the reaction chamber and the outer side of the rotor, respectively. The baffle is set on one side of the exhaust port to guide the exhaust gas.

[0017] The exhaust vents on the top and bottom plates of the reaction chamber are located on both sides of the baffle.

[0018] In this technical solution, by setting up baffles, the exhaust gas enters the reaction chamber through the exhaust gas hole of the bottom plate and can only flow around the inner cavity of the reaction chamber away from the baffles. The exhaust gas hole on the top plate is staggered from the exhaust gas hole on the top plate and is set on both sides of the baffles. In this way, the exhaust gas can flow through the reaction chamber once before it can be discharged from the exhaust gas hole on the top plate into the upper reaction chamber. This increases the residence time of the exhaust gas in the reaction chamber, increases the reaction time, and improves the reaction conversion rate.

[0019] Furthermore, the liquid flow channel structure includes:

[0020] A liquid inlet pipe is used to guide the reaction liquid into the rotor;

[0021] Liquid outlet holes are provided on the top and bottom plates of each reaction chamber.

[0022] In this technical solution, the reaction liquid enters the rotor through the liquid phase inlet pipe, is accelerated by the rotor, and then thrown out. The thrown-out reaction liquid reacts with the exhaust gas. The excess reaction liquid falls onto the bottom plate of the reaction chamber due to gravity, and flows from the liquid outlet hole of the bottom plate to the next layer of reaction chamber. In this way, the excess reaction liquid of each layer flows to the next layer of reaction chamber in sequence and is finally discharged from the liquid outlet. This allows the unreacted excess reaction liquid to be utilized, enabling the reaction liquid to be used in multiple stages, reducing liquid consumption, reducing waste, and saving energy.

[0023] Furthermore, each reaction chamber has a corresponding liquid inlet pipe, one end of which extends to the outside of the sealed shell and connects to the storage tank, and the other end extends into the rotor of the corresponding reaction chamber.

[0024] Furthermore, the liquid inlet pipe corresponding to the reaction chamber located between the uppermost and lowermost reaction chambers has a branch at the liquid outlet hole on the top plate. The branch is connected to the liquid outlet hole and can receive the excess reaction liquid discharged from the liquid outlet hole and guide it into the rotor.

[0025] In this technical solution, each reaction chamber has a different liquid inlet pipe that can independently add liquid to each reaction chamber. The liquid inlet pipe corresponding to the reaction chamber in the middle layer is also provided with a branch connected to the liquid outlet, which can receive the reaction liquid discharged from the liquid outlet and guide the reaction liquid to the rotor of the next reaction chamber. In this way, the excess reaction liquid that has not been reacted can be utilized, so that the reaction liquid can be used in multiple stages, reducing the amount of liquid used, reducing waste and saving energy.

[0026] Furthermore, the corresponding exhaust gas holes on the upper top plate and lower bottom plate protrude outwards, and the exhaust gas holes are higher than the liquid outlet holes.

[0027] In this technical solution, the exhaust gas port opening is higher than the liquid outlet port opening to prevent excess reaction liquid from flowing into the next reaction chamber from the exhaust gas port. This ensures that excess reaction liquid can only flow from the liquid outlet port to the liquid phase inlet pipe and then into the rotor, thus guaranteeing that the reaction liquid can be accelerated by the rotor and react with the exhaust gas.

[0028] Furthermore, the bottom plate of each reaction chamber is inclined towards the liquid outlet.

[0029] In this technical solution, the bottom plate is inclined towards the liquid outlet, which allows excess reaction liquid to flow smoothly into the next reaction chamber and prevents excess reaction liquid from accumulating on the bottom plate and causing waste.

[0030] Furthermore, the tilt angle of the lower base plate is 1-2°.

[0031] Furthermore, the liquid outlet is located at the bottom of the sealed housing.

[0032] Furthermore, the exhaust gas inlet is located on the lower side of the sealed housing, and the exhaust gas outlet is located at the bottom of the sealed housing.

[0033] The beneficial effects of this utility model are:

[0034] 1. By making the exhaust gas flow and liquid flow in opposite directions in each reaction chamber, i.e., the exhaust gas flows clockwise and the liquid flows counterclockwise or the exhaust gas flows counterclockwise and the liquid flows clockwise, the liquid and exhaust gas thrown out at high speed will collide and react violently in the reaction chamber, which can improve the reaction efficiency and make the exhaust gas purification more thorough.

[0035] 2. By setting up baffles, the exhaust gas enters the reaction chamber through the exhaust gas hole on the bottom plate and can only flow around the inner cavity of the reaction chamber away from the baffles. The exhaust gas hole on the top plate is staggered from the exhaust gas hole on the top plate and is set on both sides of the baffles. This allows the exhaust gas to flow through the reaction chamber once before it can be discharged from the exhaust gas hole on the top plate into the upper reaction chamber. This increases the residence time of the exhaust gas in the reaction chamber, increases the reaction time, and improves the reaction conversion rate.

[0036] 3. After the reaction liquid enters the rotor through the liquid phase inlet pipe, it is accelerated by the rotor and then thrown out. The thrown-out reaction liquid reacts with the exhaust gas. The excess reaction liquid falls onto the bottom plate of the reaction chamber due to gravity, and flows from the liquid outlet of the bottom plate to the next layer of reaction chamber. In this way, the excess reaction liquid in each layer flows to the next layer of reaction chamber in sequence and is finally discharged from the liquid outlet. This allows the unreacted excess reaction liquid to be used in multiple stages, reducing liquid consumption, reducing waste, and saving energy.

[0037] 4. The tail gas port opening is higher than the liquid outlet port opening to prevent excess reaction liquid from flowing into the next reaction chamber through the tail gas port. This ensures that excess reaction liquid can only flow from the liquid outlet port to the liquid phase inlet pipe and then into the rotor, thus guaranteeing that the reaction liquid can be accelerated by the rotor and react with the tail gas.

[0038] 5. The bottom plates are all inclined towards the liquid outlet, which allows excess reaction liquid to flow smoothly into the next reaction chamber and prevents excess reaction liquid from accumulating on the bottom plates and causing waste. Attached Figure Description

[0039] Figure 1 This is a cross-sectional view of the present invention;

[0040] Figure 2 This is an internal top view of the present invention;

[0041] Figure 3 It is the flow path of the exhaust gas and the reaction liquid;

[0042] Figure 4 This is a magnified view A;

[0043] The markings in the diagram are as follows:

[0044] 1. Sealed shell; 2. Spindle; 3. Reaction chamber; 4. Liquid outlet; 5. Exhaust gas inlet; 6. Exhaust gas outlet; 7. Rotor; 8. Exhaust gas port; 9. Baffle; 10. Top plate; 11. Bottom plate; 12. Liquid phase inlet pipe; 13. Liquid outlet; 14. Branch. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0046] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0047] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0048] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0049] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0050] Example 1:

[0051] like Figure 1As shown, a multi-stage exhaust gas purifier includes a sealed housing 1, a spindle 2, reaction chambers 3, an exhaust gas flow channel structure, and a liquid flow channel structure. The sealed housing 1 includes a liquid outlet 4, an exhaust gas inlet 5, and an exhaust gas outlet 6; the liquid outlet 4 is located at the bottom of the sealed housing 1. The exhaust gas inlet 5 is located on the lower side of the sealed housing 1, and the exhaust gas outlet 6 is located at the bottom of the sealed housing 1. The spindle 2 penetrates the sealed housing 1; there are at least three reaction chambers 3, arranged along the axis of the spindle 2 within the sealed housing 1. Each reaction chamber 3 contains a rotor 7, which rotates under the drive of the spindle 2. The tail gas flow channel structure has a tail gas inlet 5 and a tail gas outlet 6 at its two ends, allowing the tail gas to enter each reaction chamber 3 sequentially from bottom to top. The liquid flow channel structure allows the reaction liquid to enter the rotor 7 and be accelerated by the rotor 7 before being thrown out into the reaction chamber 3. The tail gas flow channel structure and the liquid flow channel structure ensure that the tail gas flow direction and the liquid flow direction are opposite in each reaction chamber 3, reacting within the reaction chamber 3. By making the tail gas flow direction and the liquid flow direction opposite in each reaction chamber 3, in this embodiment, the tail gas flows clockwise and the liquid flows counterclockwise. This causes the high-speed thrown liquid and tail gas to collide and react violently within the reaction chamber 3, which improves the reaction efficiency and makes the tail gas purification more thorough.

[0052] Example 2:

[0053] like Figure 1-2 As shown, the exhaust gas passage structure includes an exhaust gas port 8 and a baffle 9. The exhaust gas port 8 is provided on the upper top plate 10 and the lower bottom plate 11 of each reaction chamber 3, and the two exhaust gas ports 8 are staggered. Figure 1 From top to bottom, the exhaust ports are numbered 1-4. Figure 2 The exhaust ports 8 are numbered 1-4 in a counter-clockwise direction. A baffle 9 is fixedly installed between the upper top plate 10 and the lower bottom plate 11 of each reaction chamber 3. The upper and lower ends of the baffle 9 are fixedly connected to the upper top plate 10 and the lower bottom plate 11, and the left and right ends extend to the inner wall of the reaction chamber 3 and the outer side of the rotor 7, respectively. The baffle 9 is set on one side of the exhaust port 8 to guide the exhaust gas. Figure 1 From top to bottom, the baffles are numbered 1-4. Figure 2The baffles 9 are arranged in a counter-clockwise direction, numbered 1-4. The exhaust gas holes 8 on the upper top plate 10 and lower bottom plate 11 of the reaction chamber 3 are respectively located on both sides of the baffles 9. The baffles 9 ensure that the exhaust gas, after entering the reaction chamber 3 through the exhaust gas holes 8 on the lower bottom plate 11, can only flow away from the baffles 9 and around the inner cavity of the reaction chamber 3. The exhaust gas holes 8 on the upper top plate 10 are offset from those on the upper top plate 10 and are located on both sides of the baffles 9. This allows the exhaust gas to flow through the reaction chamber 3 once before exiting through the exhaust gas holes 8 on the upper top plate 10 into the next layer of the reaction chamber 3. This increases the residence time of the exhaust gas in the reaction chamber 3, increases the reaction time, and improves the reaction conversion rate. The specific flow direction of the exhaust gas is shown in [reference needed]. Figure 3 The line segment with a solid arrowhead is in the middle, and a barrier membrane is also installed at the 8-hole of the exhaust port to prevent the reaction liquid from entering.

[0054] Example 3:

[0055] like Figure 1-2 As shown in Figure 4, the liquid flow channel structure includes a liquid inlet pipe 12 and an outlet hole 13. Each reaction chamber 3 corresponds to a liquid inlet pipe 12. One end of the liquid inlet pipe 12 extends to the outside of the sealed shell 1 and connects to the storage tank, while the other end extends into the rotor 7 of the corresponding reaction chamber 3. The liquid inlet pipe 12 is used to guide the reaction liquid into the rotor 7. The liquid inlet pipe 12 corresponding to the reaction chamber 3 located between the uppermost and lowermost reaction chambers 3 has a branch 14 at the outlet hole 13 of the upper top plate 10. The branch 14 is connected to the outlet hole 13 and can receive excess reaction liquid discharged from the outlet hole 13 and guide it into the rotor 7.

[0056] Each reaction chamber 3 has an outlet hole 13 on its upper top plate 10 and lower bottom plate 11. The reaction liquid enters the rotor 7 through the liquid inlet pipe 12, is accelerated by the rotor 7, and then ejected. The ejected reaction liquid reacts with the exhaust gas. Excess reaction liquid falls onto the lower bottom plate 11 of the reaction chamber 3 due to gravity, and flows through the outlet hole 13 from the lower bottom plate 11 to the next reaction chamber 3. In this way, excess reaction liquid from each layer flows sequentially to the next reaction chamber 3 and is finally discharged from the liquid outlet 4. This allows for the utilization of unreacted excess reaction liquid, enabling multi-stage use of the reaction liquid, reducing liquid consumption, waste, and energy saving. The specific flow direction of the reaction liquid is shown in [reference needed]. Figure 3 A dashed line segment with an arrowhead.

[0057] Each reaction chamber 3 corresponds to a different liquid inlet pipe 12, which can independently add liquid to each reaction chamber 3. The liquid inlet pipe 12 corresponding to the reaction chamber 3 in the middle layer is also provided with a branch 14 connected to the liquid outlet 13, which can receive the reaction liquid discharged from the liquid outlet 13 and guide the reaction liquid to the rotor 7 of the next reaction chamber 3. In this way, the excess reaction liquid that has not been reacted can be utilized, so that the reaction liquid can be used in multiple stages, reducing the amount of liquid used, reducing waste and saving energy.

[0058] Example 4:

[0059] like Figure 1 As shown, the corresponding exhaust gas holes 8 on the upper top plate 10 and lower bottom plate 11 protrude outwards, and the exhaust gas holes 8 are higher than the liquid outlet holes 13. The higher position of the exhaust gas holes 8 prevents excess reaction liquid from flowing into the next reaction chamber 3 through the exhaust gas holes 8, ensuring that excess reaction liquid can only flow from the liquid outlet holes 13 to the liquid phase inlet pipe 12 and then into the rotor 7. This guarantees that the reaction liquid can be accelerated by the rotor 7 before reacting with the exhaust gas. The lower bottom plate 11 of each reaction chamber 3 is inclined towards the liquid outlet holes 13 at an angle of 1-2°. The inclination of the lower bottom plates 11 towards the liquid outlet holes 13 allows excess reaction liquid to smoothly enter the next reaction chamber 3, preventing excess reaction liquid from accumulating on the lower bottom plate 11 and causing waste.

[0060] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A multi-stage exhaust gas purifier, characterized in that... ,include: A sealed housing (1) includes a liquid outlet (4), an exhaust gas inlet (5), and an exhaust gas outlet (6). Mandrel (2), which penetrates the sealed shell (1); The reaction chamber (3) has at least three chambers, and multiple reaction chambers (3) are arranged in the sealed shell (1) along the axis of the spindle (2). Each reaction chamber (3) is equipped with a rotor (7). The tail gas flow channel structure has a tail gas inlet (5) and a tail gas outlet (6) at its two ends, and the tail gas flow channel structure allows the tail gas to enter each reaction chamber (3) from bottom to top. The liquid flow channel structure allows the reaction liquid to enter the rotor (7) and be accelerated by the rotor (7) before being thrown out into the reaction chamber (3). Among them, the tail gas flow channel structure and the liquid flow channel structure make the tail gas flow direction and the liquid flow direction in each reaction chamber (3) react in opposite directions in the reaction chamber (3); The exhaust gas passage structure includes: The exhaust port (8) is provided on the upper top plate (10) and lower bottom plate (11) of each reaction chamber (3), and the two exhaust ports (8) are staggered. Baffle (9) is fixedly installed between the upper top plate (10) and the lower bottom plate (11) of each reaction chamber (3). The upper and lower ends of the baffle (9) are fixedly connected to the upper top plate (10) and the lower bottom plate (11), and the left and right ends extend to the inner wall of the reaction chamber (3) and the outer side of the rotor (7) respectively. The baffle (9) is set on one side of the exhaust port (8) for guiding the exhaust gas. Among them, the exhaust vents (8) on the top plate (10) and bottom plate (11) of the reaction chamber (3) are respectively set on both sides of the baffle (9).

2. The multi-stage exhaust gas purifier according to claim 1, characterized in that, The liquid flow channel structure includes: A liquid inlet pipe (12) is used to guide the reaction liquid into the rotor (7); Liquid outlet (13) is provided on the upper top plate (10) and lower bottom plate (11) of each reaction chamber (3).

3. A multi-stage exhaust gas purifier according to claim 2, characterized in that, Each reaction chamber (3) has a corresponding liquid inlet pipe (12). One end of the liquid inlet pipe (12) extends to the outside of the sealed shell (1) and is connected to the liquid storage tank, while the other end extends into the rotor (7) of the corresponding reaction chamber (3).

4. A multi-stage exhaust gas purifier according to claim 3, characterized in that, The liquid inlet pipe (12) corresponding to the reaction chamber (3) located between the uppermost reaction chamber (3) and the lowermost reaction chamber (3) has a branch (14) at the liquid outlet (13) of the upper top plate (10). The branch (14) is connected to the liquid outlet (13) and can receive the excess reaction liquid discharged from the liquid outlet (13) and guide it into the rotor (7).

5. A multi-stage exhaust gas purifier according to claim 4, characterized in that, The corresponding exhaust vents (8) on the upper top plate (10) and lower bottom plate (11) protrude outwards, and the exhaust vents (8) are higher than the liquid outlet vents (13).

6. A multi-stage exhaust gas purifier according to claim 5, characterized in that, The bottom plate (11) of each reaction chamber (3) is inclined toward the liquid outlet (13).

7. A multi-stage exhaust gas purifier according to claim 6, characterized in that, The inclination angle of the bottom plate (11) is 1-2°.

8. A multi-stage exhaust gas purifier according to claim 7, characterized in that, The liquid outlet (4) is located at the bottom of the sealed shell (1).

9. A multi-stage exhaust gas purifier according to claim 8, characterized in that, The exhaust gas inlet (5) is located on the lower side of the sealed housing (1), and the exhaust gas outlet (6) is located at the bottom of the sealed housing (1).

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