Flue gas treatment device

Abstract

The utility model provides a flue gas treatment device which comprises the following components: a housing which is provided with a reaction space, and a gas inlet and a gas outlet which are communicated with the reaction space; the slurry conveying pipe is arranged in the reaction space, and the slurry conveying pipe is provided with a slurry spraying head and is used for spraying reaction slurry into the reaction space; the demisting structure is arranged between the slurry conveying pipe and the gas outlet, the demisting structure comprises a pinnacle cover, the pinnacle cover comprises two gas passing plates, the side edges, close to the gas outlet, of the two gas passing plates in the vertical direction are connected, the side edges, away from the gas outlet, of the two gas passing plates are spaced, and gas passing holes are formed in the gas passing plates so that smoke can flow from the bottom side of the pinnacle cover to the top side of the pinnacle cover; the cleaning liquid conveying pipe is arranged between the two gas passing plates, the cleaning liquid conveying pipe is provided with a plurality of spraying heads and used for spraying cleaning liquid to the gas passing plates, the gas passing plates are washed, the situation that the gas passing holes are blocked due to particle accumulation is reduced, and it can be guaranteed that the demisting structure has the good demisting effect for a long time.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, and in particular to a flue gas treatment device. Background Technology

[0002] A large amount of flue gas is generated during some industrial production processes. This flue gas needs to be treated and purified before it can be released into the atmosphere. Currently, gas-liquid reaction technology is commonly used to treat flue gas. Specifically, the flue gas to be treated is transported into a reaction vessel, and a reaction slurry is sprayed into the reaction vessel through a slurry delivery pipe equipped with slurry spray nozzles. This reaction between the slurry and the flue gas removes harmful substances from the flue gas.

[0003] However, the flue gas after reacting with the reaction slurry will also carry some small solid particles and small droplets. Some of these solid particles and droplets, when emitted into the atmosphere, will cause some pollution. Alternatively, if the flue gas is to undergo further treatment processes, carrying too many solid particles and droplets can also damage downstream equipment (such as pumps). Utility Model Content

[0004] One objective of this invention is to provide a flue gas treatment device that helps reduce particulate matter and droplets in the flue gas emitted by the device.

[0005] Specifically, this utility model provides a flue gas treatment device, comprising:

[0006] The outer casing has a reaction space and an air inlet and an air outlet communicating with the reaction space;

[0007] A slurry delivery pipe, disposed within the reaction space, is equipped with slurry spray nozzles for spraying reaction slurry into the reaction space; and

[0008] A demisting structure is disposed between the slurry conveying pipe and the air outlet, the demisting structure comprising:

[0009] A pointed hood includes two air vents connected on their vertical sides near the air outlet and spaced apart on their sides away from the air outlet. Each air vent has ventilation holes to allow flue gas to flow from the bottom to the top of the pointed hood.

[0010] A cleaning fluid delivery pipe is installed between the two air-passing plates, and the cleaning fluid delivery pipe is equipped with multiple spray nozzles for spraying cleaning fluid onto the air-passing plates.

[0011] Optionally, the distribution direction of the two air vents of the demisting structure is perpendicular to the air intake direction of the air inlet, and the cleaning fluid delivery pipe extends from the side of the outer shell opposite to the air inlet to the side where the air inlet is located.

[0012] Optionally, the spray head on the cleaning fluid delivery pipe is tilted upward in the direction pointing towards the air inlet.

[0013] Optionally, the acute angle formed by the axis of the spray head on the cleaning fluid delivery pipe and the axis of the air inlet is set to 4 to 10 degrees.

[0014] Optionally, the distance between the spray head on the cleaning fluid delivery pipe and the top of the pointed hood is set to 10-40 cm.

[0015] Optionally, the pointed hood is inclined from high to low along the air intake direction of the air inlet.

[0016] Optionally, the flue gas treatment device includes a demisting structure assembly composed of a plurality of laterally distributed demisting structures, wherein the distribution direction of the plurality of demisting structures in the demisting structure assembly is perpendicular to the air intake direction of the air inlet.

[0017] Optionally, the flue gas treatment device further includes:

[0018] A cleaning agent delivery pipe is disposed between two adjacent demisting structures in the demisting structure assembly for spraying cleaning agent onto the demisting structures.

[0019] Optionally, the flue gas treatment device includes a plurality of the demisting structural components, which are distributed longitudinally.

[0020] Optionally, a sludge collection tank is provided on the bottom surface of the outer shell, and the bottom surface of the outer shell slopes from high to low from the periphery of the sludge collection tank towards the location of the sludge collection tank.

[0021] This utility model's flue gas treatment device employs a demisting structure comprised of a pointed hood and a cleaning fluid delivery pipe. The pointed hood includes two air-passing plates, requiring the flue gas in the reaction space to pass through air-passing holes on the plates before flowing to the outlet. As the flue gas flows through the plates, most particles and droplets in the flue gas are blocked and adsorbed onto the surface of the plates, thus reducing the particles and droplets contained in the flue gas discharged from the treatment device. Furthermore, the cleaning fluid delivery pipe sprays cleaning fluid onto the pointed hood through spray nozzles, effectively rinsing the air-passing plates and reducing particle accumulation that could clog the air-passing holes. This helps maintain a good demisting effect for an extended period. Because the two air-passing plates form a pointed hood, meaning they are angled, the droplets adsorbed on the plates and the cleaning fluid sprayed onto them can flow along the angled direction of the plate surface, improving the rinsing effect and preventing the accumulation of liquid and solid particles on the plate surface. This further helps maintain the treatment effect of the first demisting structure for a longer period.

[0022] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0023] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0024] Figure 1 This is a schematic diagram of a flue gas treatment device according to an embodiment of the present invention;

[0025] Figure 2 This is a first schematic cross-sectional view of a flue gas treatment device according to an embodiment of the present invention;

[0026] Figure 3 This is a second schematic cross-sectional view of a flue gas treatment device according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of a pointed hood in a flue gas treatment device according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of a portion of the demisting structure in a flue gas treatment device according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic cross-sectional view of a filter device in a flue gas treatment apparatus according to an embodiment of the present invention;

[0030] Figure 7 This is a partial schematic cross-sectional view of a flue gas treatment device according to another embodiment of the present invention. Detailed Implementation

[0031] Those skilled in the art should understand that the embodiments described below are merely some embodiments of the present invention, and not all embodiments of the present invention. These embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can also refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] like Figures 1 to 4As shown, in one embodiment, the flue gas treatment device 10 includes a housing 100, two slurry delivery pipes 200, and two demisting structural assemblies. The housing 100 forms a reaction space 101 and an air inlet 102 and an air outlet 103 communicating with the reaction space 101. The slurry delivery pipes 200 are disposed within the reaction space 101 and are equipped with slurry spray heads (not marked in the figure) for spraying reaction slurry into the reaction space 101. The demisting structural assemblies are disposed between the slurry delivery pipes 200 and the air outlets 103, and include multiple demisting structures 300. Each demisting structure 300 includes a dome 310 and a cleaning fluid delivery pipe 320. The dome 310 includes two air-passing plates 311, which are connected on the sides near the air outlet 103 in the vertical direction and spaced apart on the sides away from the air outlet 103. The vent plate 311 is provided with vent holes 312 to allow flue gas to flow from the bottom side to the top side of the top hood 310. The cleaning fluid delivery pipe 320 is disposed between the two vent plates 311. The extension direction of the cleaning fluid delivery pipe 320 is the same as the extension direction of the side where the two vent plates 311 meet. The cleaning fluid delivery pipe 320 is provided with multiple spray heads (not marked in the figure) for spraying cleaning fluid onto the vent plates 311.

[0035] like Figures 1 to 3 As shown, specifically, the outer shell 100 can be divided into a main shell portion 110, a top shell portion 120, and a bottom plate 130. The main shell portion 110 is cylindrical in shape, open at both the top and bottom. An air inlet 102 is located on one side wall of the main shell portion 110, at the bottom of that side wall. The top shell portion 120 is also open at both the top and bottom, located at the top of the main shell portion 110, thus connecting with the internal space of the main shell portion 110. The top opening of the top shell portion 120 is the air outlet 103. The bottom plate 130 is located at the bottom opening of the main shell portion 110, thus closing the bottom of the main shell portion 110.

[0036] It should be noted that the outer shell 100 is divided into the main shell 110, the top shell 120 and the bottom plate 130 for the purpose of explaining the scheme of this embodiment. The main shell 110, the top shell 120 and the bottom plate 130 can be formed separately or integrally.

[0037] refer to Figures 1 to 3 As shown, for ease of explanation, the side wall where the air inlet 102 is located is defined as the front side wall, and the side wall opposite it is defined as the rear side wall. That is, the air intake direction along the air inlet 102 is the front-rear direction of the equipment, and the lateral direction perpendicular to the air intake direction is the left-right direction of the equipment.

[0038] like Figures 1 to 3As shown, two slurry delivery pipes 200 are distributed along the left and right directions of the equipment, and each slurry delivery pipe 200 passes through the rear side wall of the equipment and extends into the reaction space 101, and extends from the rear side wall of the equipment in the direction of the front side wall.

[0039] It should be noted that the flue gas treatment device can be equipped with multiple sets of slurry conveying pipes distributed longitudinally, and each set of slurry conveying pipes contains two or more slurry conveying pipes.

[0040] like Figures 1 to 4 As shown, the two air passage plates 311 of the demisting structure 300 are distributed perpendicular to the air intake direction of the air inlet 102, and the cleaning fluid delivery pipe 320 extends from the side of the outer shell 100 opposite to the air inlet 102 to the side where the air inlet 102 is located. Specifically, the two air passage plates 311 of the demisting structure 300 are distributed along the left and right direction of the flue gas treatment device 10. The upper sides of the two air passage plates 311 are connected, and the lower sides are spaced apart. That is, the two air passage plates 311 are inclined from top to bottom from the joint position to the direction of moving away from each other, thereby forming a pointed hood 310 with the pointed tip facing the air outlet 103.

[0041] like Figures 1 to 3 As shown, the cleaning fluid delivery pipe 320 of the demisting structure 300 is located between the two air vents 311, that is, on the bottom side of the dome hood 310. The cleaning fluid delivery pipe 320 extends from the rear wall of the flue gas treatment device 10 into the reaction space 101 and extends towards the front of the flue gas treatment device 10. The cleaning fluid delivery pipe 320 can spray cleaning fluid onto the dome hood 310 through a spray head. The cleaning fluid can be clean water or a solution mixed with detergent.

[0042] like Figures 1 to 4 As shown, the two demisting structure components are distributed longitudinally. Multiple demisting structures 300 within each demisting structure component are also distributed along the left-right direction of the flue gas treatment device 10.

[0043] In this embodiment, a demisting structure 300 consisting of a pointed hood 310 and a cleaning fluid delivery pipe 320 is provided. The pointed hood 310 includes two air-passing plates 311, so that the flue gas in the reaction space 101 must pass through the air-passing holes 312 on the air-passing plates 311 to flow to the outlet 103. When the flue gas flows through the air-passing plates 311, most of the particles and droplets in the flue gas are blocked and adsorbed on the surface of the air-passing plates 311, which helps to reduce the particles and droplets contained in the flue gas discharged from the flue gas treatment device 10. Moreover, the cleaning fluid delivery pipe 320 can spray cleaning fluid onto the pointed hood 310 through a spray head, which has a rinsing effect on the air-passing plates 311, reducing the occurrence of particle accumulation and clogging of the air-passing holes 312, and helping to ensure that the demisting structure 300 has a good demisting effect for a long time. Because the two air-permeable plates 311 form a pointed hood 310, meaning the two air-permeable plates 311 are inclined, the droplets adsorbed on the air-permeable plates 311 and the cleaning liquid sprayed onto the air-permeable plates 311 can flow along the inclined direction of the surface of the air-permeable plates 311, improving the rinsing effect and preventing liquid and solid particles from accumulating on the surface of the air-permeable plates 311, which helps to further ensure the treatment effect of the first demisting structure 300 for a longer period of time.

[0044] Furthermore, by utilizing multiple laterally distributed demisting structures 300 to form a demisting structure assembly, the demisting efficiency is improved. Moreover, by setting multiple vertically distributed demisting structure assemblies, the flue gas must pass through multiple demisting structures before flowing to the outlet 103, forming a progressive demisting effect, which helps to further improve the removal of particles and droplets.

[0045] It should be noted that the number of defogging structures contained in multiple defogging structure components can be the same or different.

[0046] It should be noted that the two air passage plates 311 can be formed separately and then connected together to form a pointed cover 310, or they can be formed by bending a single plate, with the two parts on both sides of the bending angle serving as the two air passage plates 311.

[0047] It should be noted that the defogging structure in the defogging structure assembly can be fixed together by the sides of the adjacent air vents of their respective pointed hoods, or each can be fixed to the support structure.

[0048] like Figures 1 to 5As shown, the spray head on the cleaning fluid delivery pipe 320 is tilted upwards in the direction pointing towards the air inlet 102. Specifically, the spray head on the cleaning fluid delivery pipe 320 is tilted towards the front and upper part of the flue gas treatment device 10. By tilting the spray head on the cleaning fluid delivery pipe 320 upwards in the direction pointing towards the air inlet 102, it helps to expand the spray range of the spray head on the air passage plate 311, and compared to a vertically upward spray head, the tilted spray head can prevent the flushed dirt from being squeezed to the pointed tip on the bottom side of the pointed cover 310 and thus being pressed tight and unable to fall off.

[0049] like Figures 1 to 5 As shown, furthermore, the acute angle formed by the axis of the spray head on the cleaning fluid delivery pipe 320 and the axis of the air inlet 102 is set to 4 to 10 degrees. For example, it can be 4 degrees, 4.5 degrees, 5 degrees, 5.5 degrees, 6 degrees, 6.5 degrees, 7 degrees, 7.5 degrees, 8 degrees, 8.5 degrees, 9 degrees, 9.5 degrees, or 10 degrees, etc. Figure 5 As shown, angle α indicates the acute angle formed by the axis of the spray head on the cleaning fluid delivery pipe 320 and the axis of the air inlet 102, which is 4 to 10 degrees. The above structure makes the spray range of the spray head on the cleaning fluid delivery pipe 320 more suitable and ensures a better rinsing effect on the upper part of the top cover 310.

[0050] Preferably, the acute angle formed by the axis of the spray head on the cleaning fluid delivery pipe 320 and the axis of the air inlet 102 is set to 7 to 9 degrees.

[0051] like Figures 1 to 4 As shown, the distance between the spray head on the cleaning fluid delivery pipe 320 and the top of the dome 310 is set to 10–40 cm. For example, it can be 10 cm, 15 cm, 20 cm, 25 cm, 30 cm, 35 cm, or 40 cm, etc. This configuration helps to ensure a better rinsing effect on the upper part of the dome 310.

[0052] like Figures 1 to 4 As shown, the pointed hood 310 is inclined from high to low along the air intake direction of the air inlet 102. That is, the pointed hood 310 is inclined downward along the direction from front to back of the flue gas treatment device 10, which helps to further improve the fluidity of the liquid on the air passage plate 311, and makes the liquid gather and drip down to a lower position, which helps to improve the flushing effect on the air passage plate 311 and facilitates liquid collection.

[0053] like Figures 1 to 3As shown, a sludge collection tank 104 is provided on the bottom surface of the outer shell 100, and the bottom surface of the outer shell 100 slopes from high to low towards the location of the sludge collection tank 104. Specifically, the sludge collection tank 104 is provided on the bottom plate 130, and the bottom plate 130 slopes towards the sludge collection tank 104. This structure allows sludge and reacted slurry to fall onto the bottom surface of the outer shell 100 and be collected in the sludge collection tank 104, and then discharged from the sludge collection tank 104, which is beneficial for the collection of sludge and reacted slurry and subsequent treatment.

[0054] Reference Figures 1 to 6 As shown, the flue gas treatment device 10 is equipped with a filter device 400, which includes a container body 410 and a filter screen 420. The container body 410 forms a filter chamber 411, and an inlet 412 and an outlet 413 communicating with the filter chamber 411. The inlet 412 is used to receive the raw slurry, and the outlet 413 is used to connect to the slurry delivery pipe 200. The filter screen 420 is disposed inside the filter chamber 411, thereby dividing the filter chamber 411 into two parts, and the inlet 412 and the outlet 413 are located on both sides of the filter screen 420.

[0055] Therefore, the raw slurry entering the filter chamber 411 through the inlet 412 can only reach the outlet 413 after passing through the filter screen 420, and then enter the slurry delivery pipe 200. In other words, the slurry entering the slurry delivery pipe 200 has been filtered, thereby reducing the occurrence of clogging in the slurry delivery pipe 200.

[0056] like Figure 7 As shown, in one embodiment, when the flue gas treatment device includes a demisting structure assembly composed of a plurality of laterally distributed demisting structures, the flue gas treatment device further includes a cleaning agent delivery pipe 500 disposed between two adjacent demisting structures 300 in the demisting structure assembly, for spraying cleaning agent onto the demisting structures 300, thereby helping to further improve the cleaning effect of the demisting structures 300. The cleaning agent can be water or a solution mixed with cleaning agent.

[0057] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A flue gas treatment device, characterized in that, include: The outer casing has a reaction space and an air inlet and an air outlet communicating with the reaction space; A slurry delivery pipe is installed within the reaction space, and the slurry delivery pipe is equipped with slurry spray heads for spraying reaction slurry into the reaction space. as well as A demisting structure is disposed between the slurry conveying pipe and the air outlet, the demisting structure comprising: The pointed hood includes two air passage plates, which are connected on the side near the air outlet in the vertical direction and spaced apart on the side away from the air outlet. The air passage plates are provided with air passage holes to allow flue gas to flow from the bottom side to the top side of the pointed hood. and A cleaning fluid delivery pipe is installed between the two air-passing plates, and the cleaning fluid delivery pipe is equipped with multiple spray nozzles for spraying cleaning fluid onto the air-passing plates.

2. The flue gas treatment device according to claim 1, characterized in that, The two air vents of the demisting structure are distributed perpendicular to the air inlet direction, and the cleaning fluid delivery pipe extends from the side of the outer shell opposite to the air inlet to the side where the air inlet is located.

3. The flue gas treatment device according to claim 2, characterized in that, The spray head on the cleaning fluid delivery pipe is tilted upwards in the direction pointing towards the air inlet.

4. The flue gas treatment device according to claim 3, characterized in that, The acute angle formed by the axis of the spray head on the cleaning fluid delivery pipe and the axis of the air inlet is set to 4 to 10 degrees.

5. The flue gas treatment device according to claim 4, characterized in that, The distance between the spray head on the cleaning fluid delivery pipe and the top of the pointed hood is set to 10-40 cm.

6. The flue gas treatment device according to claim 2, characterized in that, The pointed hood is tilted from high to low along the air intake direction of the air inlet.

7. The flue gas treatment device according to claim 2, characterized in that, The flue gas treatment device includes a demisting structure assembly composed of multiple horizontally distributed demisting structures, wherein the distribution direction of the multiple demisting structures in the demisting structure assembly is perpendicular to the air intake direction of the air inlet.

8. The flue gas treatment device according to claim 7, characterized in that, Also includes: A cleaning agent delivery pipe is disposed between two adjacent demisting structures in the demisting structure assembly for spraying cleaning agent onto the demisting structures.

9. The flue gas treatment device according to claim 7, characterized in that, The flue gas treatment device includes a plurality of the demisting structural components, which are distributed longitudinally.

10. The flue gas treatment apparatus according to claim 1, characterized in that, The bottom surface of the outer shell is provided with a sludge collection tank, and the bottom surface of the outer shell slopes from high to low from the periphery of the sludge collection tank towards the location of the sludge collection tank.

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