Gas-liquid mixing plate and flue gas purification device

Abstract

The present invention provides a gas-liquid mixing plate and a flue gas purification device, relating to the field of flue gas purification technology. The device comprises a gas-liquid mixing plate body, wherein a plurality of tubular channels are provided within the gas-liquid mixing plate body. The plurality of channels intersect and intersect with each other to form a mixed flow zone. The gas-liquid mixing plate provided by the present invention forms a mixed flow zone by providing a plurality of intersecting and interpenetrating channels within the gas-liquid mixing plate body. This allows flue gas entering the gas-liquid mixing plate body from any channel to come into contact with a scrubbing liquid, thereby allowing the scrubbing liquid and flue gas to fully mix and react within the mixed flow zone, increasing the contact area between the scrubbing liquid and flue gas, and thereby improving the flue gas purification effect.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas purification, and in particular to a gas-liquid mixing plate and a flue gas purification device. Background Art

[0002] Air pollutant emissions are one of the main causes of air pollution and haze, which seriously damages the ecological environment and is extremely harmful to human health. X The main source of air pollutants is industrial production. For example, the high-temperature combustion flue gases emitted from the chimneys of thermal power, steel, metallurgy, building materials, and chemical plants require desulfurization, denitrification, and dust removal.

[0003] At present, wet spraying is mainly used for dust removal, desulfurization and denitrification. A large amount of washing liquid is atomized, and the washing liquid is allowed to contact and react with the flue gas through multi-layer spraying and filling to carry out desulfurization, denitrification and dust removal. In the above-mentioned dust removal, desulfurization and denitrification process by wet spraying, after the droplets are atomized, there is still a certain small distance between the droplets. This gap will prevent a small part of the flue gas from contacting and reacting with the washing liquid, resulting in poor flue gas treatment effect. Summary of the Invention

[0004] The technical problem solved by the present invention is that during the current flue gas treatment process, it is impossible to ensure that the flue gas is in complete contact with the scrubbing liquid, which results in poor flue gas purification effect.

[0005] To solve the above problems, the present invention provides a gas-liquid mixing plate, comprising a gas-liquid mixing plate body, wherein a plurality of tubular channels are provided in the gas-liquid mixing plate body, and the plurality of channels cross and penetrate each other to form a mixed flow area.

[0006] Optionally, each of the channels is cross-connected with at least two channels with different distribution directions, and the channels form a variable diameter structure at the intersection to constitute Venturi mixing.

[0007] Optionally, the aperture range of the channel is 0.3 mm to 10 mm; the thickness range of the gas-liquid mixing plate body is 2 cm to 50 cm.

[0008] Another object of the present invention is to provide a flue gas purification device, including a gas-liquid purification structure, the gas-liquid purification structure including a shell with a hollow structure, the shell being provided with a gas-liquid mixing plate as described above; the gas-liquid purification structure also includes a water separation plate provided in the shell; the water separation plate is provided above the gas-liquid mixing plate.

[0009] Optionally, the gas-liquid mixing plate and the water distribution plate are both distributed in the shell along the horizontal direction.

[0010] Optionally, a water curtain purification structure is further included; the water curtain purification structure is arranged at the upper end of the gas-liquid purification structure, and the water curtain purification structure is connected to the gas-liquid purification structure.

[0011] Optionally, the water curtain purification structure includes a water trough, a through hole is provided at the bottom of the water trough, and the water trough is connected with the gas-liquid purification structure through the through hole; a perforated plate is provided between the through hole and the side wall of the water trough; a water inlet tray is provided above the perforated plate, and an outer water baffle is provided on the outer side of the water inlet tray; the washing liquid in the water inlet tray overflows from the outer water baffle to form a water curtain; a water inlet hole is provided on the water inlet tray; the perforated plate includes the gas-liquid mixing plate as described above; the top of the side wall is inclined toward the outer side of the water trough.

[0012] Optionally, the orifice plates are distributed along the vertical direction.

[0013] Optionally, a protruding structure is provided in the middle of the water inlet tray, and the cross-sectional shape of the protruding structure is an inverted V shape; the water inlet holes are provided on both sides of the protruding structure.

[0014] Optionally, a gap is provided between the orifice plate and the bottom of the water trough to form a water flow channel; an inner water baffle extending upward is provided at the bottom of the water trough; the inner water baffle is located on the inner side of the orifice plate; the top of the inner water baffle is higher than the top of the water flow channel.

[0015] Compared with the prior art, the gas-liquid mixing plate provided by the present invention has the following advantages:

[0016] The gas-liquid mixing plate provided by the present invention forms a mixed flow zone by arranging a plurality of mutually intersecting channels in the gas-liquid mixing plate body, so that the flue gas entering the gas-liquid mixing plate body from any channel can contact the washing liquid, so that the washing liquid and the flue gas are fully mixed and reacted in the mixed flow zone, increasing the contact area between the washing liquid and the flue gas, thereby improving the effect of purifying the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of the gas-liquid mixing plate of the present invention;

[0018] Figure 2 is a cross-sectional view of the gas-liquid mixing plate of the present invention;

[0019] Figure 3 This is a simplified structural diagram of the flue gas purification device described in the present invention.

[0020] Description of reference numerals:

[0021] 1-gas-liquid purification structure; 11-gas-liquid mixing plate body; 111-channel; 12-shell; 13-water distribution plate; 2-water curtain purification structure; 21-water trough; 211-through hole; 212-side wall; 213-inner water retaining plate; 22-orifice plate; 23-water inlet tray; 231-outer water retaining plate; 232-water inlet hole; 233-protrusion structure; 24-water flow channel. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the purpose of simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0024] Furthermore, the terms "first" and "second" are used solely to simplify the description and should not be construed as indicating or implying relative importance, or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0025] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" the first feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" the second feature includes the first feature being directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" the second feature includes the first feature being directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In order to solve the problem that the flue gas cannot be completely contacted with the scrubbing liquid during the current flue gas treatment process, which leads to poor flue gas purification effect, the present invention provides a gas-liquid mixing plate. Figure 1 、 Figure 2 As shown, the gas-liquid mixing plate includes a gas-liquid mixing plate body 11 , in which a plurality of tubular channels 111 are provided. The plurality of channels 111 intersect and penetrate each other to form a mixed flow area.

[0028] Through the mutually intersecting channels 111, the gas-liquid mixing plate forms a three-dimensional structure similar to a screen; when using the gas-liquid mixing plate, the flue gas enters the gas-liquid mixing plate body 11 from one side of the gas-liquid mixing plate, is cut into several small air columns by several channels 111 in the gas-liquid mixing plate body 11, and enters the channels 111; the washing liquid enters the gas-liquid mixing plate body 11 from the other side of the gas-liquid mixing plate, and enters the channels 111; the washing liquid and the flue gas cut into small air columns continuously collide in the mixed flow area formed by the mutually intersecting channels 111, are fully mixed and contacted, and corresponding reactions occur, thereby achieving the purpose of purifying the flue gas.

[0029] The gas-liquid mixing plate provided by the present invention forms a mixed flow zone by arranging a plurality of mutually intersecting channels 111 in the gas-liquid mixing plate body 11, so that the flue gas entering the gas-liquid mixing plate body 11 from any channel 111 can come into contact with the washing liquid, so that the washing liquid and the flue gas are fully mixed and reacted in the mixed flow zone, increasing the contact area between the washing liquid and the flue gas, thereby improving the effect of purifying the flue gas.

[0030] The material of the gas-liquid mixing plate can be metal or polymer material; the distribution direction of the gas-liquid mixing plate in this application can be selected according to the flow direction of the flue gas and the washing liquid; according to the characteristics of the gas and liquid flow, this application preferably distributes the gas-liquid mixing plate in the horizontal direction, so that the flue gas enters the channel 111 from the bottom of the gas-liquid mixing plate, and the washing liquid enters the channel 111 from the top of the gas-liquid mixing plate, so that the flue gas and the washing liquid are fully mixed and contacted in the mixed flow area through the cross-connected channels 111.

[0031] The scrubbing liquid may be a desulfurizer, a denitrifier, water or any other scrubbing liquid capable of purifying the flue gas, and may be determined according to the requirements of the flue gas treatment. This article does not limit the scrubbing liquid.

[0032] Furthermore, in the present application, each channel 111 is cross-connected with at least two channels 111 with different distribution directions, and the channels 111 form a variable diameter structure at the intersection to constitute Venturi mixing.

[0033] By connecting each channel 111 to at least two channels 111 with different distribution directions, when the flue gas reaches the position where a certain channel 111 intersects with other channels 111 with different distribution directions, the cross-sectional area of ​​the channel 111 becomes larger, thereby forming a negative pressure at that position, which plays a role of Venturi mixing. The negative pressure formed can draw more flue gas and scrubbing liquid into the channel 111, thereby playing a role of efficient mixing, and further improving the efficiency of the flue gas purification treatment.

[0034] The gas-liquid mixing plate provided by the present application has each channel 111 connected to and communicated with at least two channels 111 with different distribution directions, so that Venturi mixing is formed at the intersection and communication position of each channel 111 with other channels 111, so that the gas-liquid mixing plate provided by the present application constitutes a large-area plate-shaped module of Venturi cluster-type gas-liquid two-phase mixed flow, with a porosity of more than 55%, thereby improving the mixing efficiency of the scrubbing liquid and the flue gas without increasing the power of the circulating pump, thereby improving the flue gas purification treatment effect.

[0035] The aperture range of the channel 111 is preferably 0.3 mm to 10 mm, so that a microchannel structure that is interconnected is formed in the gas-liquid mixing plate body 11 through a plurality of channels 111, thereby ensuring that each part of the flue gas can come into contact with the scrubbing liquid on the one hand, and further increasing the contact area between the scrubbing liquid and the flue gas on the other hand, thereby improving the purification effect.

[0036] The thickness of the gas-liquid mixing plate body 11 is determined according to the requirements for flue gas purification. In the present application, the preferred thickness range of the gas-liquid mixing plate body 11 is 2 cm to 50 cm.

[0037] Another object of the present invention is to provide a flue gas purification device, see Figure 3 As shown, the flue gas purification device includes a gas-liquid purification structure 1, which includes a shell 12 with a hollow structure. The gas-liquid mixing plate as described above is arranged in the shell 12.

[0038] The cross-section of the shell 12 can be any geometric shape such as circular, elliptical, rectangular, etc. The present application prefers that the cross-section of the shell 12 is rectangular, so as to reduce the footprint of the flue gas purification device while maintaining the same flue gas treatment capacity; when using the flue gas purification device, the washing liquid and the flue gas enter different channels 111 from both sides of the gas-liquid mixing plate respectively, and fully collide, mix, and contact in the mixed flow area through the mutually intersecting channels 111, so as to achieve the purpose of efficient purification of the flue gas.

[0039] The number of gas-liquid mixing plates in the shell 12 can be one or more; the distribution directions of multiple gas-liquid mixing plates arranged in the same shell 12 can be the same or different, depending on the flue gas treatment requirements.

[0040] The gas-liquid purification structure 1 in the present application further includes a water separation tray 13 disposed in the shell 12 , and the water separation tray 13 is disposed above the gas-liquid mixing plate.

[0041] Before entering the gas-liquid mixing plate, the washing liquid first passes through the water distribution plate 13, so that the washing liquid is in a uniform distribution state before entering the gas-liquid mixing plate, thereby improving the uniform distribution of the washing liquid in the gas-liquid mixing plate, so that washing liquid enters each channel 111, thereby ensuring the effect of purifying the flue gas.

[0042] The gas-liquid mixing plate and the water distribution plate 13 can be distributed in the shell 12 along the horizontal direction, that is, distributed in the horizontal direction, or they can be inclined at a certain angle to the horizontal direction; the present application preferably distributes the gas-liquid mixing plate and the water distribution plate 13 in the shell 12 along the horizontal direction, so that the flue gas enters the channel 111 from the bottom of the gas-liquid mixing plate, and the washing liquid enters the channel 111 from the top of the gas-liquid mixing plate, and then further continuously contacts and collides and mixes the gas and liquid through the mutually intersecting channels 111 to achieve purification of the flue gas.

[0043] The flue gas purification device provided in the present application adopts a gas-liquid mixing plate to achieve efficient gas-liquid mixing of the scrubbing liquid and the flue gas, so that the flue gas purification device has a smaller liquid-gas ratio. For example, the liquid-gas ratio range of conventional technology is 20 to 30, while the liquid-gas ratio of the flue gas purification device in the present application is only 1 to 5, which is beneficial to reducing the circulation volume of the circulation pump, greatly reducing the power of the circulation pump, and reducing energy consumption.

[0044] In order to further improve the flue gas purification effect, the flue gas purification device provided in this application also includes a water curtain purification structure 2; the water curtain purification structure 2 is arranged at the upper end of the gas-liquid purification structure 1, and the water curtain purification structure 2 is connected to the gas-liquid purification structure 1.

[0045] The flue gas purified by the gas-liquid purification structure 1 rises along the gas-liquid purification structure 1 and enters the water curtain purification structure 2. After further water curtain purification treatment in the water curtain purification structure 2, the flue gas is directly discharged or further treated accordingly.

[0046] The water curtain purification structure 2 in the present application can be any device in the prior art that can achieve water curtain purification treatment; specifically, the present application preferably includes a water trough 21, and a through hole 211 is provided at the bottom of the water trough 21, and the water trough 21 is connected to the gas-liquid purification structure 1 through the through hole 211.

[0047] After the flue gas is fully in gas-liquid contact with the scrubbing liquid in the gas-liquid purification structure 1 , it enters the water curtain purification structure 2 through the through hole 211 , and is further purified by the water curtain.

[0048] In this application, a perforated plate 22 is provided between the through hole 211 and the side wall 212 of the water tank 21, a water inlet tray 23 is provided above the perforated plate 22, and an outer water baffle 231 is provided on the outer side of the water inlet tray 23; the washing liquid in the water inlet tray 23 overflows from the outer water baffle 231 to form a water curtain; a water inlet hole 232 is provided on the water inlet tray 23.

[0049] When the flue gas purification device is used, the washing liquid is transported to the water inlet tray 23, a part of the washing liquid enters the water tank 21 through the water inlet hole 232, and enters the gas-liquid purification structure 1 through the through hole 211 at the bottom of the water tank 21, and further collides and contacts with the flue gas in the gas-liquid mixing plate to purify the flue gas; when the water level in the water inlet tray 23 reaches the height of the outer water baffle 231, a part of the washing liquid overflows from the water inlet tray 23, and the overflowed washing liquid forms a water curtain on the outside of the orifice plate 22; the washing liquid purified by the gas-liquid purification structure 1 The flue gas enters the water tank 21 through the through hole 211, and then further passes through the orifice plate 22, contacts the water curtain on the outside of the orifice plate 22, and passes through the water curtain; in the process of passing through the water curtain, the flue gas contacts the washing liquid again to purify the flue gas; after passing through the water curtain, the flue gas contacts and collides with the side wall 212 of the water tank 21; the entrained water in the flue gas forms droplets during the collision between the flue gas and the side wall 212, and flows into the water tank 21, thereby improving the purification effect of the flue gas while reducing the entrained water in the discharged flue gas.

[0050] The distribution direction of the orifice plate 22 can be vertical, or can be inclined at a certain angle to the vertical direction; in this application, the distribution direction of the orifice plate 22 is preferably vertical.

[0051] The orifice plate 22 may be any device having a through-hole structure; in the present application, the orifice plate 22 is preferably a gas-liquid mixing plate as described above.

[0052] In addition, in order to facilitate the discharge of smoke after the smoke collides with the side wall 212, the present application preferably tilts the top of the side wall 212 toward the outside of the water tank 21; wherein the outside of the water tank 21 refers to the side away from the center of the water tank 21.

[0053] Furthermore, a raised structure 233 is provided in the middle of the water inlet tray 23, and water inlet holes 232 are provided on both sides of the raised structure 233, so as to facilitate the washing liquid in the water inlet tray 23 to enter the water tank 21 through the water inlet holes 232; the cross-sectional shape of the raised structure 233 can be any geometric shape, and the present application preferably prefers that the cross-sectional shape of the raised structure 233 is an inverted V shape.

[0054] Furthermore, in the present application, a gap is provided between the orifice plate 22 and the bottom of the water tank 21, forming a water flow channel 24; the washing liquid overflowing from the water inlet tray 23 into the water tank 21 flows into the gas-liquid purification structure 1 through the water flow channel 24, and is further used to purify the flue gas.

[0055] In order to prevent the flue gas from entering the water curtain purification structure 2 from the gas-liquid purification structure 1 and escaping from the water flow channel 24, thereby preventing the flue gas from coming into contact with the washing liquid in the water curtain, the present application further provides an upwardly extending inner water baffle 213 at the bottom of the water tank 21; the inner water baffle 213 is located on the inner side of the orifice plate 22; and the top of the inner water baffle 213 is higher than the top of the water flow channel 24, thereby ensuring that the water flow channel 24 is always filled with washing liquid, preventing the flue gas from escaping from the water flow channel 24.

[0056] In the flue gas purification device provided by the present invention, during the flue gas purification process, the flue gas first contacts with the gas-liquid mixing of the washing liquid in the transversely distributed gas-liquid mixing plate to perform gas-liquid purification treatment. After the treated flue gas passes through the orifice plate 22 again, it passes through the water curtain composed of the washing liquid and is purified again to ensure the purification effect of the flue gas.

[0057] By adopting different washing liquids, the flue gas purification device provided by the present invention can be applied to various types of flue gas purification treatments, and can also achieve coordinated treatment of multiple pollutants in the flue gas, removing pollutants such as smoke, sulfur dioxide, nitrogen oxides, heavy metals and dioxins in the flue gas; and during the flue gas treatment process, the flue gas treatment capacity is not limited by the concentration of pollutants in the flue gas, has a wide range of applications, and solves problems comprehensively.

[0058] The flue gas purification device provided in the present application can not only treat flue gas, but also be used to purify the air; when purifying the air, pure water can be used as the washing liquid, and through the full contact between water and air, PM2.5, PM10, aerosol particles, etc. in the air can be effectively removed to achieve the purpose of purifying the air; the water after the air purification treatment can be recycled after membrane treatment and purification; the filtered solid particles (PM2.5 and PM10 in the air) are treated as general solid waste.

[0059] The flue gas purification device provided in this application can be used as a single device, or different numbers of flue gas purification devices can be configured to be used in combination according to the flue gas treatment volume to treat the flue gas; when multiple flue gas purification devices are used in combination, each flue gas purification device can operate independently, thereby facilitating replacement and maintenance of the device.

[0060] For ease of understanding, this article takes the scrubbing liquid as water and the flue gas purification device for dust removal as an example to describe in detail the use process of the flue gas purification device.

[0061] First, the flue gas to be treated enters the gas-liquid purification structure 1 from the bottom, is cut into small gas columns through the channel 111 and enters the gas-liquid mixing plate body 11; the water in the water inlet tray 23 enters the water tank 21 through the water inlet hole 232, and then enters the gas-liquid purification structure 1 through the through hole 211; in the gas-liquid purification structure 1, after being evenly distributed by the water distribution tray 13, the water enters the gas-liquid mixing plate body 11 through the channel 111; the water left from above and the flue gas entering from below fully collide and contact in the mutually intersecting channels 111, and the large dust particles in the flue gas collide with the water, and the weight increases after being entrained by the water, and they lose their upward momentum, and are thus impacted by the water flow and flow downward In the dust removal and washing pool; the dust-removed flue gas continues to rise along the channel 111, and after coming out of the gas-liquid mixing plate body 11, it continues to pass upward through the holes in the water separation plate 13 and the gap between the water separation plate 13 and the shell 12, and enters the water curtain purification structure 2; the flue gas carries a part of water with it in the water curtain purification structure 2 and passes through the holes on the orifice plate 22, and contacts the water curtain formed by the water overflowing from the water inlet plate 23. Under the action of the flue gas conveying power, the flue gas passes through the water curtain and is washed and purified again by the water curtain; the flue gas passing through the water curtain hits the side wall 212, and the entrained water in the flue gas forms droplets after collision and flows back to the water tank 21, completing the dust removal and purification of the flue gas.

[0062] It can be seen that in the process of using the flue gas dust removal device to treat the flue gas, the route of the flue gas is: the outlet of the previous treatment unit, the gas-liquid mixing plate body 11, the water distribution plate 13, the orifice plate 22, the side wall 212, and the inlet of the next treatment unit; the route of the washing liquid is: the washing tank, the pump, the water inlet main pipe, the water inlet plate 23, the water tank 21, the water flow channel 24, the water distribution plate 13, the gas-liquid mixing plate body 11, and the washing tank.

[0063] When the flue gas purification device is used for denitrification or desulfurization, the water in the above process can be replaced with the corresponding denitrification agent or desulfurization agent.

[0064] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A flue gas purification device, characterized in that: The invention comprises a gas-liquid purification structure (1), wherein the gas-liquid purification structure comprises a shell (12) having a hollow structure, wherein a first gas-liquid mixing plate is arranged in the shell (12), and the gas-liquid purification structure (1) further comprises a water separation plate (13) arranged in the shell (12); the water separation plate (13) is arranged above the first gas-liquid mixing plate, and the first gas-liquid mixing plate and the water separation plate (13) are both distributed in the horizontal direction in the shell (12); and further comprises a gas-liquid purification structure (1) arranged in the gas-liquid purification structure (1) The water curtain purification structure (2) is provided at the upper end of the structure (1), and the water curtain purification structure (2) is connected to the gas-liquid purification structure (1), the water curtain purification structure (2) comprises a water trough (21), a through hole (211) is provided at the bottom of the water trough (21), and the water trough (21) is connected to the gas-liquid purification structure (1) through the through hole (211); a perforated plate (22) is provided between the through hole (211) and the side wall (212) of the water trough (21); the perforated plate ( 22) is provided with a water inlet tray (23), and an outer water baffle (231) is provided on the outer side of the water inlet tray (23); the washing liquid in the water inlet tray (23) overflows from the outer water baffle (231) to form a water curtain; the water inlet tray (23) is provided with a water inlet hole (232); the orifice plate (22) includes a second gas-liquid mixing plate; the top end of the side wall (212) is inclined toward the outer side of the water tank (21); the first gas-liquid mixing plate and the second gas-liquid mixing plate both include A gas-liquid mixing plate body (11) is provided with a plurality of tubular channels (111) in the gas-liquid mixing plate body (11), wherein the plurality of channels (111) intersect and penetrate each other to form a mixed flow area, and each of the channels (111) is cross-connected with at least two channels (111) with different distribution directions at the same time, and the channels (111) form a variable diameter structure at the intersection to form a Venturi mixing, and the first gas-liquid mixing plate and the second gas-liquid mixing plate both constitute a plate-shaped module of a Venturi cluster type gas-liquid two-phase mixed flow.

2. The flue gas purification device according to claim 1, characterized in that: The aperture range of the channel (111) is 0.3 mm to 10 mm; the thickness range of the gas-liquid mixing plate body (11) is 2 cm to 50 cm.

3. The flue gas purification device according to claim 1, characterized in that: The orifice plates (22) are distributed along the vertical direction.

4. The flue gas purification device according to claim 1, characterized in that: A raised structure (233) is provided in the middle of the water inlet tray (23), and the cross-sectional shape of the raised structure (233) is an inverted V-shape; the water inlet holes (232) are provided on both sides of the raised structure (233).

5. The flue gas purification device according to claim 1, characterized in that: A gap is provided between the orifice plate (22) and the bottom of the water trough (21), forming a water flow channel (24); an inner water baffle (213) extending upward is provided at the bottom of the water trough (21); the inner water baffle (213) is located on the inner side of the orifice plate (22); and the top end of the inner water baffle (213) is higher than the top end of the water flow channel (24).

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