JP3243234U - Flue gas dedusting and mixing equipment - Google Patents

Abstract

A flue gas dedusting and mixing system that increases the accuracy and safety of measurement tests. A case body 1, a plurality of air inlet pipes 2, an exhaust pipe 3, and a water inlet pipe 4 are provided, and the case body is provided with a plurality of air inlet holes, exhaust holes, water inlet holes, and drain holes 131, An adjustment member 132 is provided for controlling the opening and closing of the drain hole, an air intake pipe passes through the air intake hole and is connected to the case body, an exhaust pipe is connected to the case body, and the exhaust pipe is connected to the case body through the exhaust hole. A water inlet pipe passes through the water inlet hole and is connected to the case body. By injecting water into the case body through the water inlet pipe, part of the inlet pipe is placed below the liquid surface. The flue gas enters the water through the inlet pipe, the dust settles to the bottom of the water under the action of gravity, the gas rises in the mixing cavity and mixes, and finally exits through the exhaust pipe for hydraulic dedusting of the flue gas By completing the mixing with the multi-dust air stream pretreatment, the dust will not affect the measurement of the flue gas composition. [Selection drawing] Fig. 1

Description

The present invention relates to the field of boiler flue gas measurement technology, and more particularly to flue gas dedusting and mixing devices.

Coal-fired power plants have three main machines: boilers, steam turbines, and generators. In the whole production process, the power plant boiler operating condition has the most influencing factors, the worst operating condition, the most main and auxiliary equipment, the largest system, the highest failure rate, and the largest maintenance volume. , Among the amount of daily maintenance, the amount of boiler maintenance is several times more than the total maintenance amount of other steam turbines and generators, especially the stability of the combustion system is the safe, economical and environmentally friendly boiler. It is the key to driving decisions. In order to ensure the safety and stability of the boiler's combustion system, it is important to accurately measure the composition of the flue gas produced by the combustion in the boiler.

Due to the large capacity of the power plant boiler, the amount of flue gas generated is large, the cross-sectional area of the flue is large, and the distribution of flue gas components in the same cross-section is poor. In the related art, the measurement is performed by the mesh method on the same section of the flue to be measured, a sampling tube with a predetermined depth is inserted into each sampling point, and the flue gas of multiple sampling tubes is extracted at the same time and mixed. and sent to the flue gas analyzer for component analysis. However, flue gas is a gas-solid two-phase flow containing high concentrations of dust.

The present invention aims to solve at least one technical problem in the related art to some extent.

Therefore, an embodiment of the present invention proposes a flue gas dedusting and mixing device which is simple in structure, reliable and fully functional.

The flue gas dedusting and mixing device according to an embodiment of the present invention comprises a case body, a plurality of air inlet pipes, an exhaust pipe and a water inlet pipe, and a plurality of air inlet holes on the top surface of the case body. and an exhaust hole, a water inlet hole is provided in the peripheral wall of the case body, a drain hole is provided in the lower end surface of the case body, and an adjustment member for controlling opening and closing of the drain hole is provided in the drain hole. A plurality of the air inlet pipes correspond to the plurality of air inlets on a one-to-one basis, the air inlet pipes pass through the air inlets and are connected to the case main body, and the exhaust pipe is connected to the case main body. , the exhaust pipe communicates with the internal cavity of the case body through the exhaust hole, and the water inlet pipe passes through the water inlet hole and is connected to the case body.

The flue gas dedusting and mixing device according to the embodiment of the present invention injects water into the case body through the water inlet pipe, so that a part of the inlet pipe is below the liquid level. The flue gas enters the water in the case body through the inlet pipe, the large particle dust sinks to the bottom of the water under the action of gravity, and the gas rises and mixes in the mixing cavity, and finally exits through the exhaust pipe, forming smoke By completing the hydraulic dust removal and mixing of flue gas, it is possible to realize the pretreatment of multi-dusty air streams, so that dust will not affect the flue gas analyzer's flue gas component measurement, and the measurement test increase the accuracy and safety of

In some embodiments, the case body comprises a top cover, an upper case part and a lower case part connected in sequence, the air inlet and the air outlet are located in the top cover, and the water inlet is located in the Located in the peripheral wall of the upper case part, the cross-sectional area of the lower case part gradually decreases from top to bottom, and the drain hole is located at the lower end of the lower case part.

In some embodiments, a plurality of said inlet holes are distributed around said outlet holes at intervals.

In some embodiments, the upper case portion is cylindrical, and the central axis of the exhaust hole is coaxial with the central axis of the upper case portion.

In some embodiments, the length of the inlet tube located within the case body is m, and the height of the upper case portion is n, where m:n=2:3.

In some embodiments, the lower end surface of the air intake pipe is inclined from bottom to top along the radial direction of the upper case portion toward a direction approaching the peripheral wall of the upper case portion. .

In some embodiments, one end of the water inlet pipe positioned outside the upper case portion is positioned above one end of the water inlet pipe positioned inside the upper case portion.

In some embodiments the adjustment member is a valve.

In some embodiments, the air inlet, exhaust and water inlet tubes are all valved.

In some embodiments, the flue gas dedusting and mixing device further comprises a liquid level gauge provided on the outer peripheral wall of the upper case portion.

1 is a schematic diagram of a flue gas dedusting and mixing device according to an embodiment of the present invention; FIG. 1 is a schematic view of a case body of a flue gas dedusting and mixing device according to an embodiment of the present invention; FIG. 1 is a schematic view of a top cover of a flue gas dedusting and mixing device according to an embodiment of the present invention; FIG.

Embodiments of the invention will now be described in detail, the details of which are illustrated in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to illustrate the invention and should not be taken as limiting the invention.

A flue gas dedusting and mixing apparatus according to an embodiment of the present invention will now be described with reference to the drawings.

As shown in FIGS. 1 to 3, the flue gas dedusting and mixing device according to the embodiment of the present invention includes a case body 1, a plurality of air inlet pipes 2, an exhaust pipe 3, a water inlet pipe 4, Prepare. A plurality of air inlet holes 111 and exhaust holes 112 are provided in the upper end surface of the case body 1, a water inlet hole is provided in the peripheral wall of the case body 1, and a drain hole 131 is provided in the lower end face of the case body 1 for drainage. The hole 131 is provided with an adjusting member 132 for controlling opening and closing of the drain hole 131 .
A plurality of air inlet pipes 2 correspond to a plurality of air inlet holes 111 on a one-to-one basis, and the air inlet pipes 2 pass through the air inlet holes 111 and are connected to the case body 1 . An exhaust pipe 3 is connected to the case body 1 , the exhaust pipe 3 communicates with the internal cavity of the case body 1 through an exhaust hole 112 , and a water inlet pipe 4 passes through the water inlet hole and is connected to the case body 1 .

In addition, the flue to be measured is measured by the mesh method, multiple sampling points are uniformly arranged in one of the cross sections of the flue, a sampling tube of a predetermined depth is inserted into each sampling point, and each The sampling tube is connected to one of the inlet pipes 2 of the flue gas dedusting and mixing device according to the embodiment of the present invention, so that the flue gas of multiple sampling tubes can be sampled at the same time, and the flue gas of the present invention is The dust of large particles of the flue gas is removed by transporting it into the case body 1 of the flue gas dedusting and mixing device according to the embodiment for dedusting and mixing. The flue gas from which the large particle dust has been removed is mixed in the case body 1 of the flue gas dedusting and mixing device according to the embodiment of the present invention, and then the flue gas according to the embodiment of the present invention is It is discharged through the exhaust pipe 3 of the dust removal and mixing device, and the dust removal and mixing pretreatment function for the multi dust-bearing airflow is realized by the flue gas dust removal and mixing device according to the embodiment of the present invention.

Alternatively, as shown in FIGS. 1 and 3, the case body 1 is provided vertically. A plurality of air inlet holes 111 corresponding to the plurality of air inlet pipes 2 on a one-to-one basis are provided in the upper end surface of the case body 1 . The air inlet 111 extends vertically, the upper end of the air inlet 111 communicates with the outside world, and the lower end of the air inlet 111 communicates with the internal cavity of the case body 1 . The inlet pipe 2 is provided in a vertical direction. The lower end of the inlet pipe 2 is located in the internal cavity of the case body 1 so as to communicate with the cavity.

Specifically, by filling the gap between the outer peripheral wall of the air inlet pipe 2 and the hole wall of the air inlet 111 with the glue solution, not only the role of connection but also the role of sealing the connection between the two is achieved. . Alternatively, by fitting a seal ring to the outer peripheral wall of the intake pipe 2, after the intake pipe 2 passes through the intake hole 111, the seal ring abuts against the hole wall of the intake hole 111 to act as a seal. 2 and the hole wall of the inlet hole 111 are connected by welding.

Alternatively, as shown in FIGS. 1 and 3, the upper end surface of the case body 1 is further provided with an exhaust hole 112 extending in the vertical direction, the upper end of the exhaust hole 112 communicates with the outside, and the exhaust hole 112 communicates with the outside. The lower end communicates with the internal cavity of the case body 1 . The lower end of the exhaust pipe 3 is positioned within the exhaust hole 112 , the outer peripheral wall of the exhaust pipe 3 is connected to the hole wall of the exhaust hole 112 , and the lower end of the exhaust pipe 3 communicates with the internal cavity of the case body 1 . The lower end of the pipe 3 is flush with the lower end of the exhaust hole 112 , and the exhaust pipe 3 is not inserted into the case body 1 .

Specifically, by filling the gap between the outer peripheral wall of the exhaust pipe 3 and the hole wall of the exhaust hole 112 with the glue solution, not only the role of connection but also the role of sealing the connection between the two. . Alternatively, by fitting a seal ring to the outer peripheral wall of the exhaust pipe 3, after the exhaust pipe 3 is inserted into the exhaust hole 112, the seal ring comes into contact with the hole wall of the exhaust hole 112 to act as a seal, and the exhaust pipe 3 and the hole wall of the exhaust hole 112 are connected by welding.

Alternatively, as shown in FIG. 1, the casing body 1 is provided with a water inlet hole in the peripheral wall thereof, and there is an angle between the central axis of the water inlet hole and the central axis of the case body 1, and the angle between the two is It is greater than 0 degrees and less than or equal to 90 degrees. The water inlet pipe 4 is provided according to the extending direction of the water inlet hole so that both directions are aligned. The water inlet pipe 4 passes through the water inlet, the outer peripheral wall of the water inlet pipe 4 is connected to the hole wall of the water inlet, and the right end of the water inlet pipe 4 is connected so that the right end opening of the water inlet pipe 4 communicates with the internal cavity of the case body 1. is located in the internal cavity of the case body 1 .

Specifically, by filling the gap between the outer peripheral wall of the water inlet pipe 4 and the hole wall of the water inlet hole with the glue solution, not only the role of connection but also the role of sealing the connection between the two is achieved. Alternatively, by fitting a seal ring to the outer peripheral wall of the water inlet pipe 4, after the water inlet pipe 4 passes through the water inlet hole, the seal ring abuts against the hole wall of the water inlet hole to play a role of sealing, and the water inlet pipe 4 is sealed. The outer peripheral wall and the hole wall of the water inlet are connected by welding.

In addition, a water source can be externally attached to the left end of the water inlet pipe 4, and water is injected into the inner cavity of the case body 1 through the water inlet pipe 4, and it is not necessary to fill the inner cavity of the case body 1 with water. leave part of the cavity for mixing. For convenience of explanation, the cavity above the liquid level is called the mixing cavity. The lower end of the inlet pipe 2 is placed below the liquid surface, the multi-flue gas enters the case body 1 through each inlet pipe 2 respectively, and after being washed with water, the large particles of dust sink to the bottom of the water under the action of gravity. , the gas floats up in the mixing cavity, is mixed by the turbulent flow inside the case body 1, and is finally discharged from the exhaust pipe 3, completing the hydraulic dedusting and mixing process of the flue gas.

Alternatively, as shown in FIGS. 1 and 2, the lower end surface of the case body 1 is provided with a drain hole 131 extending vertically, and the upper end of the drain hole 131 communicates with the inner cavity of the case body 1; The lower end of the drain hole 131 communicates with the outside world. Also, the drain hole 131 is provided with an adjustment member 132 for controlling opening and closing of the drain hole 131 .

If a large amount of dust particles accumulate in the internal cavity of the case body 1, the liquid level rises, the volume of the mixing cavity decreases, and the mixing space becomes insufficient. Also, if a large amount of sediment is submerged up to the lower end of the inlet pipe 2, the hydraulic dust removal effect is affected. Therefore, by opening the drain hole 131, the turbid water and sediment in the case body 1 can be discharged and replaced with clean water, so that the flue gas dust removal and mixing device according to the embodiment of the present invention can operate normally. A stable operation can be guaranteed.

In addition, the operator can observe the height of the liquid level in the case body 1, intuitively display the operation status of the flue gas dust removal and mixing device according to the embodiment of the present invention, and the entire dust removal and mixing process. A hard transparent material is used for the case so that you can see at a glance.

Therefore, in the flue gas cleaning and mixing device according to the embodiment of the present invention, water is injected into the case body 1 through the water inlet pipe 4, so that a part of the inlet pipe 2 is below the liquid level. The flue gas enters the water inside the case body 1 through the inlet pipe 2, the large particles of dust sink to the bottom of the water under the action of gravity, the gas floats in the mixing cavity and is mixed, and finally discharged from the exhaust pipe 3. By completing the hydraulic dedusting and mixing of flue gas, the pretreatment of multi-dusty airflow is realized, so that the dust will not affect the flue gas component measurement by the flue gas analyzer. , to increase the accuracy and safety of measurement tests.

In some embodiments, as shown in FIGS. 1-3, the case body 1 comprises a top cover 11, an upper case part 12 and a lower case part 13 which are connected in sequence.
The inlet hole 111 and the outlet hole 112 are located in the top cover 11 , the water inlet hole is located in the peripheral wall of the upper case part 12 , the cross-sectional area of the lower case part 13 gradually decreases from top to bottom, and the drain hole 131 is formed. is positioned at the lower end of the lower case portion 13 .

Alternatively, as shown in FIGS. 1-3, the top cover 11 is circular, the upper case portion 12 is cylindrical, and the lower case portion 13 is generally inverted conical. A top cover 11 is connected to the upper end of the upper case portion 12 so as to close the opening of the upper end of the upper case portion 12 . The lower end of the upper case portion 12 is connected to the upper end of the lower case portion 13 so that the internal cavity of the upper case portion 12 and the internal cavity of the lower case portion 13 communicate with each other. The extending hole at the lower end of the lower case portion 13 is the drain hole 131 described above.

Specifically, as shown in FIGS. 1 to 3, the central axis of the top cover 11, the central axis of the upper case portion 12, and the central axis of the lower case portion 13 are coaxially provided, and the outer diameter of the top cover 11 and the The outer diameter of the upper case portion 12 is the same, and the outer diameter of the upper case portion 12 and the outer diameter of the upper end of the lower case portion 13 are the same. The central axis of the drain hole 131 is coaxial with the central axis of the lower case portion 13 , that is, the drain hole 131 is located in the central portion of the lower case portion 13 .

Since the cross-sectional area of the lower case portion 13 gradually decreases in the direction from top to bottom, solid particles in the flue gas fall through the inclined wall surface of the lower case portion 13 into the drain hole 131 and drain water. The sediment is easily discharged from the drain hole 131 when the replacement is performed.

In some embodiments, the central axis of the air outlet 112 is coaxial with the central axis of the upper case portion 12 and the plurality of air inlets 111 are spaced around the air outlet 112, as shown in FIGS. It is widely distributed.

Alternatively, as shown in FIGS. 1 to 3, the exhaust hole 112 is located in the central portion of the case body 1, and the distance between the air inlet 111 and the outer peripheral wall of the upper case part 12 is the same as that of the air inlet 111 and the upper case. It is smaller than the distance from the central axis of the portion 12 , that is, the air inlet 111 is closer to the outer peripheral wall of the case body 1 .

In addition, the flue gas enters the case body 1 through the uniformly distributed inlet pipe 2, which structurally realizes the uniform distribution of the airflow entering the case body 1. FIG. In addition, the exhaust hole 112 is located at the center of the case body 1 so that the multi-flue gas uniformly entering the case body 1 is dust-removed and then enters the mixing cavity and gathers at the center. The subsequent flue gas is thoroughly mixed in the mixing cavity.

In some embodiments, the length of the inlet tube 2 located within the case body 1 is m and the height of the upper case part 12 is n, m:n=2:3. In other words, the vertical distance between the lower end of the intake pipe 2 and the top cover 11 is m, and the vertical distance between the upper end of the upper case portion 12 and the lower end of the upper case portion 12 is n. is equal to two-thirds n.

In some embodiments, as shown in FIG. 1, the lower end surface of the inlet pipe 2 is directed from bottom to top along the radial direction of the upper case portion 12 in a direction approaching the peripheral wall of the upper case portion 12. sloping towards. That is, after the flue gas enters the water through the inlet pipe 2, the flue gas in each path enters the mixing cavity along the circumferential direction of the upper case part 12, and after dust removal, the opening at the lower end of the inlet pipe 2 is are provided inwardly and outwardly of the upper case portion 12 so that the flue gas in each passage is sufficiently mixed.

Alternatively, as shown in FIG. 1 , the lower end surface of the air intake pipe 2 is inclined, and the upper end of the lower end surface of the air intake pipe 2 and the lower end of the lower end surface of the air intake pipe 2 are aligned in the radial direction of the upper case portion 12 . , and the upper end of the lower end surface of the intake pipe 2 is separated from the central axis of the upper case portion 12 with respect to the lower end of the lower end surface of the intake pipe 2 .

In some embodiments, as shown in FIG. 1, one end of the water inlet pipe 4 positioned outside the upper case portion 12 is positioned above one end positioned inside the upper case portion 12 of the water inlet pipe 4. there is

Alternatively, one end located on the outer peripheral wall of the upper case part 12 of the water inlet is located above the one end located on the inner peripheral wall of the upper case part 12 of the water inlet, that is, the water inlet is inclined. . As shown in FIG. 1 , the left end of the water inlet pipe 4 is located above the right end of the water inlet pipe 4 .

In some embodiments, the control member 132 is a valve, and the inlet pipe 2, the exhaust pipe 3 and the water inlet pipe 4 are all provided with valves, as shown in FIG. For convenience of explanation, the valve on the inlet pipe 2 is called the inlet valve 211 , the valve on the exhaust pipe 3 is called the exhaust valve 311 , and the valve on the water inlet pipe 4 is called the water inlet valve 411 .

When using the flue gas dedusting and mixing device according to the embodiment of the present invention, first, all the valves of the flue gas dedusting and mixing device according to the embodiment of the present invention are closed. ensure that Then, the water inlet valve 411 is opened to inject water into the case main body 1 through the water inlet pipe 4. When the water height exceeds the lower end of the inlet pipe 2 and reaches half the height of the upper case portion 12, the water injection is stopped. Then, the water inlet valve 411 is closed. Inlet valve 211 and exhaust valve 311 are opened to provide hydraulic dedusting and mixing to the multi-flue gas extracted from the flue.

The water in the case body 1 closes the inlet valve 211 and the exhaust valve 311 , opens the valve (regulating member 132 ) of the drain hole 131 and the water inlet valve 411 , and allows the water containing dust in the case body 1 to flow through the drain hole 131 . , clean water enters from the water inlet pipe 4 and is periodically replaced by stepwise replacement of the used contaminated water. After the water quality is changed, the valve of the drain hole 131 and the water inlet valve 411 are closed, the inlet valve 211 and the outlet valve 311 are opened, and the airflow of the inlet pipe 2 and the outlet pipe 3 is restored.

In some embodiments, as shown in FIG. 1, a liquid level gauge 5 provided on the outer peripheral wall of the upper case portion 12 is further provided. By providing the liquid level gauge 5, the operator can observe the height of the liquid level in the case body 1 more accurately.

Alternatively, as shown in FIG. 1, the liquid level gauge 5 is provided in a vertical direction, the upper end of the liquid level gauge 5 is flush with the upper end of the upper case portion 12, and the lower end of the liquid level gauge 5 is It is flush with the lower end of the upper case portion 12 .

As described above, the flue gas dedusting and mixing apparatus according to the embodiment of the present invention can hydraulically dedust and thoroughly mix the particulate matter in the multi-dust laden airstream. In terms of specific operation, the flue gas can be hydraulically dust-removed simply by putting ordinary water into the case body 1, and the dust-removal effect is high, and the cost is low. The flue gas then enters the case body 1 along the circumferential direction, which can structurally achieve a uniform distribution of the incoming airflow, providing preconditions for other premixing. In addition, by forming the lower end of the inlet pipe 2 into a slanted cross-section and directing the slanted cross-section outward, the gas in each passage can be introduced into the mixing cavity in the circumferential direction and mixed more sufficiently.

In addition, since the case body 1 is made of a hard and transparent material, it is possible to intuitively display the operation status of the flue gas dust removal and mixing device according to the embodiment of the present invention, and the entire dust removal and mixing process can be viewed at a glance. I understand. By providing the liquid level gauge 5, it is possible to accurately control the liquid level, preventing the lack of mixing space due to the liquid level being too high and the reduction in dust removal efficiency due to the liquid level being too low. be able to. The cooperation of the water inlet pipe 4 and the drain hole 131 allows the water in the case body 1 to be exchanged online or offline.

In the description of the present invention, "center", "longitudinal", "horizontal", "length", "width", "thickness", "top", "bottom", "front", "back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial" ”, “circumferential direction”, etc. are the orientations or positional relationships shown based on the drawings, and are for easy explanation and simplification of the present invention. should not be construed as limitations on the invention, as they do not indicate or imply that the device or element being supported must have a particular orientation, or be constructed or operated in a particular orientation. Please understand.

Also, the terms "first" and "second" are used for descriptive purposes only and are to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. should not be done. Thus, features defined by "first" and "second" may express or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless specifically limited.

In the present invention, terms such as "attach", "connect", "connect", "fix" should be understood broadly unless explicitly defined and limited. For example, it may be a fixed connection, a removable connection, or an integral one. It may be a mechanical connection, it may be an electrical connection, or it may be able to communicate with each other. It may be a direct connection, an indirect connection through an intermediate medium, an internal communication between two parts, or an interaction relationship between two parts. A person skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

In the present invention, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first feature is in direct contact, unless expressly specified and limited. and the second feature may be in indirect contact through an intermediate medium. And that the first feature is "above", "above" or "top" the second feature indicates that the first feature is directly above or diagonally above the second feature, or It only indicates that the horizontal height is higher than the second feature. A first feature being "below", "below" or "below" a second feature indicates that the first feature is directly below or diagonally below the second feature, or at the horizontal height of the first feature. is lower than the second feature.

In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" are used to describe the embodiment or example. It is indicated that the specific features, structures, materials or characteristics described are included in at least one embodiment or example of the present invention. Exemplary descriptions of such terms in this specification are not necessarily directed to the same embodiment or example. And the specific features, structures, materials or features described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples, and features of different embodiments or examples, described herein, unless contradicted by each other.

Although embodiments of the present invention have been shown and described above, the above embodiments are illustrative and should not be construed as limitations on the present invention, and variations, modifications, and substitutions of the above embodiments by those skilled in the art will occur. and variations are all within the protection scope of the present invention.

1 Case body 11 Top cover 111 Air inlet 112 Air outlet 12 Upper case part 13 Lower case part 131 Drain hole 132 Adjusting member 2 Air inlet pipe 211 Air inlet valve 3 Exhaust pipe 311 Exhaust valve 4 Water inlet pipe 411 Water inlet valve 5 Liquid level gauge

Claims (10)

A flue gas dedusting and mixing device comprising:
a case body, wherein a plurality of air inlets and exhaust holes are provided in the upper end surface of the case body, a water inlet hole is provided in the peripheral wall of the case body, and a drain hole is provided in the lower end surface of the case body; the case body provided with an adjustment member for controlling the opening and closing of the drain hole in the drain hole;
a plurality of air inlet pipes, said plurality of air inlet pipes corresponding to said plurality of air inlet holes on a one-to-one basis, said plurality of air inlet pipes penetrating said air inlet holes and connected to said case main body; the inlet tube;
an exhaust pipe connected to the case body and communicating with an internal cavity of the case body through the exhaust hole;
and a water inlet pipe passing through the water inlet and connected to the case body. the case body comprises a top cover, an upper case portion and a lower case portion which are connected in order,
the air inlet and the air outlet are located in the top cover;
the water inlet hole is located in the peripheral wall of the upper case,
the cross-sectional area of the lower case portion gradually shrinks in the direction from top to bottom;
2. The flue gas cleaning and mixing device of claim 1, wherein said drain hole is located at the lower end of said lower case part. 3. The flue gas dedusting and mixing device of claim 2, wherein a plurality of said inlet holes are spacedly distributed around said outlet hole. 4. The flue gas dedusting and mixing device of claim 3, wherein said upper case portion is cylindrical and the central axis of said exhaust hole is coaxial with the central axis of said upper case portion. 3. The method according to claim 2, wherein the length of the air intake pipe located in the case body is m, the height of the upper case portion is n, and m:n=2:3. flue gas dedusting and mixing equipment. A lower end surface of the intake pipe is inclined from bottom to top along a radial direction of the upper case portion toward a direction approaching a peripheral wall of the upper case portion. 6. Flue gas dedusting and mixing apparatus according to paragraph 5. 3. The flue gas of claim 2, wherein one end of the water inlet pipe located outside the upper case portion is positioned above one end of the water inlet pipe located inside the upper case portion. dedusting and mixing equipment. 2. A flue gas dedusting and mixing device according to claim 1, wherein said adjustment member is a valve. 2. The flue gas cleaning and mixing device of claim 1, wherein the inlet pipe, the exhaust pipe and the water inlet pipe are all provided with valves. 3. The flue gas dedusting and mixing apparatus of claim 2, further comprising a liquid level gauge provided on the outer peripheral wall of the upper case portion.

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