Dedusting and demisting device

Abstract

The utility model provides a dedusting and demisting device. The dedusting and demisting device comprises dedusting equipment and demisting equipment, the dust removal equipment comprises a shell, a filtering piece and a pulse air cannon. The shell is provided with an inlet and an outlet which are communicated with the interior of the shell, and the outlet is located above the inlet. The periphery of the filtering part is connected with the inner peripheral wall of the shell, and the filtering part is located between the inlet and the outlet and used for filtering particle impurities. The pulse air cannon communicates with the interior of the shell and is used for conveying pulse air into the shell to purge the filtering piece so as to achieve cleaning of the filtering piece. The demisting equipment comprises a shell, a spraying mechanism and a demister, the shell is provided with an inlet and a discharge outlet which are communicated with the interior of the shell, the inlet is communicated with the outlet of the shell, and the discharge outlet is located above the inlet. And the spraying mechanism is communicated with the interior of the shell and is used for spraying washing liquid into the shell so as to remove impurities such as sulfides and the like. The demister is located between the inlet and the discharge outlet, the periphery of the demister is connected with the inner circumferential wall of the shell, and the demister is used for eliminating mist.

Description

Technical Field

[0001] This utility model relates to the field of gas purification technology, and in particular to a dust removal and demisting device. Background Technology

[0002] With social development and technological progress, environmental problems caused by industrial production are becoming increasingly prominent. For example, coke oven gas produced during the coking process contains a large amount of dust, droplets and other impurities. If these impurities are not treated and are directly emitted into the atmosphere, they will cause environmental pollution. Alternatively, during the process of recovering and utilizing coke oven gas (for example, in the process of producing hydrogen from coke oven gas to liquefied natural gas), it will affect the normal operation of subsequent systems and the efficiency of subsequent utilization.

[0003] Currently, some demisting and dust removal devices mainly use demisters to remove mist droplets and adsorb dust. During this process, dust easily adheres to the top of the demister. As the usage time increases, the efficiency of the demister itself decreases, and there is a risk of demister clogging. This is very inconvenient for long-term and large-scale pretreatment work. Utility Model Content

[0004] The purpose of this utility model is to provide a dust removal and demisting device that integrates dust removal equipment and demisting equipment into one unit. It can simultaneously remove impurities such as dust, droplets, sulfides, and mist from coke oven gas, thereby improving the purification effect and efficiency of the dust removal and demisting device on coke oven gas. Furthermore, the dust removal equipment also has a self-cleaning function, which can reduce the risk of clogging of the dust removal and demisting device and ensure its normal operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] According to one aspect of this application, a dust removal and demisting device is provided, comprising:

[0007] A dust removal device includes a housing, a filter element, and a pulse air cannon. The housing has an inlet and an outlet communicating with its interior, with the outlet located above the inlet. The outer periphery of the filter element is connected to the inner peripheral wall of the housing, and the filter element is located between the inlet and the outlet. The filter element is used to filter particulate impurities. The pulse air cannon communicates with the interior of the housing and is used to deliver pulsed air into the housing to purge the filter element.

[0008] A demisting device includes a housing, a spraying mechanism, and a demister. The housing has an inlet and an outlet communicating with its interior. The inlet is connected to the outlet of the outer shell. The outlet is located above the inlet. The spraying mechanism is connected to the interior of the housing and is used to spray flushing liquid into the housing. The demister is located between the inlet and the outlet, and its outer periphery is connected to the inner peripheral wall of the outer shell. The demister is used to eliminate fog.

[0009] In some embodiments, the pulse air cannon includes an air cannon body and a nozzle. The air cannon body is fixed to the outer peripheral wall of the housing. The air cannon body is provided with a communicating air inlet and an air outlet. The air inlet communicates with the outside. The air cannon body is used to provide pulsed air.

[0010] The nozzle is located inside the housing and is positioned vertically above the inlet. The nozzle communicates with the air outlet and the interior of the housing.

[0011] In some embodiments, the nozzle is positioned vertically above the filter element;

[0012] The number of nozzles is multiple, and the multiple nozzles are distributed at intervals inside the housing. The multiple nozzles are connected to the air outlet through a connecting pipe.

[0013] In some embodiments, the filter element includes a filter bag and a fixing plate. The filter bag has an open top and is hollow inside, and a plurality of filter holes are spaced apart on the filter bag. The fixing plate is arranged around the outer periphery of the filter bag and fixed to the top of the filter bag. The outer periphery of the fixing plate is fixedly connected and sealed to the inner peripheral wall of the outer shell.

[0014] The top opening of the filter bag is provided with at least one nozzle of the pulse air cannon.

[0015] In some embodiments, the inlet and the outlet are arranged horizontally on opposite sides of the housing;

[0016] The outer shell includes a cylindrical body and a dust collection hopper. The cylindrical body is fixed to the top of the dust collection hopper, and the interior of the cylindrical body communicates with the interior of the dust collection hopper. The inlet and the outlet are located on the cylindrical body. The diameter of the dust collection hopper gradually decreases from top to bottom, and the bottom of the dust collection hopper is provided with a dust outlet.

[0017] The dust removal equipment also includes multiple support legs, which are fixed to the cylinder at circumferential intervals, and each support leg is located on the outer periphery of the ash collection hopper, with the support legs extending downward beyond the ash outlet.

[0018] In some embodiments, the spraying mechanism includes a spray pump and a spraying element. The spray pump is arranged outside the housing and is used to pump out rinsing liquid. The spraying element is disposed inside the housing and located above the inlet. The spraying element is connected to the output end of the spray pump through a spray pipe and is in communication with the inside of the housing.

[0019] The inlets are located vertically spaced above the bottom wall of the housing, and a storage chamber for storing rinsing fluid is formed inside the housing below the inlets; the input end of the spray pump is connected to the storage chamber through an input pipe.

[0020] In some embodiments, the spraying mechanism includes a spraying element disposed inside the housing;

[0021] The demister is located vertically above the spray element; the outer periphery of the demister is sealed to the inner peripheral wall of the housing;

[0022] The demister includes a frame and multiple demister plates; the outer periphery of the frame is fixedly and sealed to the inner peripheral wall of the housing; the upper and lower ends of the frame are open; the multiple demister plates are fixedly fixed inside the frame at intervals along the horizontal direction, and adjacent demister plates enclose each other to form a vertically open flow channel.

[0023] In some embodiments, the demister further includes a plurality of folded plates, each of the demister plates having at least one folded plate corresponding to it, the folded plates extending into the flow channel, and the folded plates and the demister plates enclosing each other to form a downward-opening demister space;

[0024] Each of the aforementioned demisters has a corrugated structure; each of the aforementioned folded plates is bent.

[0025] In some embodiments, the spraying mechanism includes a spraying element disposed inside the housing;

[0026] The demisting device also includes a demister, which is disposed inside the housing and located below the spray element; the demister is located above the inlet;

[0027] The demister includes a frame and a mesh. The outer periphery of the frame is fixedly and sealed to the inner peripheral wall of the housing. The upper and lower ends of the frame are connected. The mesh is located inside the frame and has multiple mesh holes spaced apart for gas to pass through.

[0028] In some embodiments, the inlet and the outlet are arranged horizontally on opposite sides of the housing;

[0029] The shell includes a shell body, the interior of which is hollow; the inlet and the outlet are disposed vertically on the shell body;

[0030] The shell body has a reservoir cavity for storing flushing fluid formed below the inlet; the shell body has a window communicating with the reservoir cavity; a door is provided at the window, the door is movably connected to the shell body, and the door is used to open and close the window;

[0031] The housing also includes a guide portion located at the top of the housing body, the interior of which communicates with the interior of the housing body; the top wall of the guide portion near the discharge port slopes upward toward the inlet from bottom to top.

[0032] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0033] In this application, because the filter element of the dust removal equipment is located between the inlet and outlet of the outer shell, it can prevent dust, droplets, and other particulate impurities in the coke oven gas entering the outer shell from the inlet from moving upwards, thereby achieving particulate impurity filtration and dust removal. Furthermore, the pulse air cannon, connected to the interior of the outer shell, can deliver pulsed air into the outer shell to purge the filter element. Under the action of the pulsed air, the particulate impurities attached to the filter element can be shaken off, achieving dust removal of the filter element, improving its filtration efficiency and effect, and thus realizing the self-cleaning operation of the dust removal equipment.

[0034] Furthermore, the coke oven gas, after dust removal, flows from the outer shell outlet into the interior of the demister. The spray mechanism of the demister sprays flushing liquid into the interior to wash the coke oven gas. Under the action of the flushing liquid, harmful substances such as sulfides are removed from the coke oven gas. Simultaneously, the flushing process also adsorbs residual dust and other particulate impurities in the coke oven gas, thereby improving the dust removal efficiency. At the same time, the demister of the demister removes mist from the coke oven gas, achieving the purpose of demisting.

[0035] In other words, the dust removal and demisting device in this application adopts an integrated structure consisting of dust removal equipment and demisting equipment. It can achieve dust removal, sulfide removal, and demisting treatment of coke oven gas in stages, thereby gradually removing impurities such as dust, droplets, sulfides, and mist carried in the coke oven gas. This facilitates the improvement of the purification effect and efficiency of the dust removal and demisting device on the coke oven gas, reducing the processing pressure on subsequent systems. Furthermore, since the dust removal equipment also has a self-cleaning function, it can reduce the risk of clogging of the dust removal and demisting device, thus ensuring the normal operation of the dust removal and demisting device. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the dust removal and demisting device in this embodiment.

[0037] Figure 2 yes Figure 1 A schematic diagram of the structure along the AA direction.

[0038] Figure 3 This is a cross-sectional view of the demister in this embodiment.

[0039] Figure 4 yes Figure 3 Enlarged structural diagram at point B.

[0040] The annotations in the attached figures are explained as follows:

[0041] 1. Dust removal equipment; 11. Shell; 111. Inlet; 112. Outlet; 113. Cylinder; 114. Ash hopper; 115. Ash outlet; 12. Filter element; 121. Fixing plate; 122. Filter bag; 13. Pulse air cannon; 131. Air cannon body; 132. Nozzle; 133. Connecting pipe; 134. Support frame; 14. Support leg; 2. Demisting equipment; 21. Shell; 211. Inlet; 212. Discharge outlet; 21 3. Shell body; 214. Guide section; 215. Door body; 22. Spraying mechanism; 221. Spray pump; 222. Spraying component; 223. Spray pipe; 224. Input pipe; 225. Support base; 23. Demister; 231. Frame; 232. Demister plate; 2321. Main body; 2322. Corrugated section; 233. Folded plate; 24. Demister; 241. Frame; 242. Mesh; 25. Connecting pipe; 26. Column. Detailed Implementation

[0042] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0043] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] This application provides a dust removal and demisting device for treating gas to remove impurities. Specifically, this application takes coke oven gas as an example. Since coke oven gas contains a large number of impurities such as droplets, dust, and sulfides, the dust removal and demisting device can remove these impurities from the coke oven gas.

[0046] The specific embodiments of the dust removal and demisting device of this application will be described in detail below with reference to the accompanying drawings.

[0047] Figure 1 This is a schematic diagram of the dust removal and demisting device in this embodiment. Figure 2 for Figure 1 A schematic diagram of the structure along the AA direction.

[0048] refer to Figure 1 , Figure 2 The dust removal and demisting device includes a dust removal device 1 and a demisting device 2. The dust removal device 1 includes a housing 11, a filter element 12, and a pulse air cannon 13. The housing 11 has an inlet 111 and an outlet 112 communicating with its interior, with the outlet 112 located above the inlet 111. The outer periphery of the filter element 12 is connected to the inner peripheral wall of the housing 11, and the filter element 12 is located between the inlet 111 and the outlet 112, used to filter particulate impurities. The pulse air cannon 13 communicates with the interior of the housing 11 and is used to deliver pulsed air into the housing 11 to purge the filter element 12. The demisting device 2 includes a housing 21, a spray mechanism 22, and a demister 23. The housing 21 has an inlet 211 and an outlet 212 communicating with its interior, with the inlet 211 communicating with the outlet 112 of the housing 11, and the outlet 212 located above the inlet 211. The spray mechanism 22 is connected to the interior of the housing 21 and is used to spray flushing fluid into the housing 21. The demister 23 is located between the inlet 211 and the outlet 212. The outer periphery of the demister 23 is connected to the inner peripheral wall of the housing 11 and is used to eliminate mist.

[0049] In this application, since the filter element 12 of the dust removal equipment 1 is located between the inlet 111 and the outlet 112 of the outer shell 11, the filter element 12 can prevent dust, mist droplets, and other particulate impurities in the coke oven gas entering the interior of the outer shell 11 from moving upwards, thereby achieving particulate impurity filtration and dust removal. Furthermore, the pulse air cannon 13, which communicates with the interior of the outer shell 11, can deliver pulsed air into the interior of the outer shell 11 to blow away the filter element 12. Under the action of the pulsed air, the particulate impurities attached to the filter element 12 can be shaken off, thereby achieving dust removal treatment of the filter element 12, improving the filtration efficiency and effect of the filter element 12, and thus realizing the self-cleaning operation of the dust removal equipment 1.

[0050] Furthermore, the coke oven gas, after dust removal, flows from the outlet 112 of the outer shell 11 into the interior of the shell 21 of the demister 2. The spray mechanism 22 of the demister 2 sprays flushing liquid into the shell 21 to flush the coke oven gas. Under the action of the flushing liquid, harmful substances such as sulfides in the coke oven gas are removed. Simultaneously, during the flushing process, residual dust and other particulate impurities in the coke oven gas are adsorbed, thereby improving the dust removal effect. At the same time, the demister 23 of the demister 2 is used to remove mist from the coke oven gas, achieving the purpose of demisting.

[0051] In other words, the dust removal and demisting device in this application adopts an integrated structure consisting of a dust removal device 1 and a demisting device 2. It can achieve dust removal, sulfide removal, and demisting treatment of coke oven gas in stages, so as to gradually remove impurities such as dust, droplets, sulfides, and mist carried in the coke oven gas. This facilitates the improvement of the purification effect and efficiency of the dust removal and demisting device on the coke oven gas, thereby reducing the processing pressure on subsequent systems. Furthermore, since the dust removal device 1 also has a self-cleaning function, it can reduce the risk of the dust removal and demisting device being blocked, thus ensuring the normal operation of the dust removal and demisting device.

[0052] refer to Figure 1 and Figure 2 The dust removal equipment 1 includes a housing 11, a filter element 12, and a pulse air cannon 13.

[0053] The outer shell 11 is provided with an inlet 111 and an outlet 112 communicating with its interior. The inlet 111 is used to connect with the coke oven gas source so that the coke oven gas can flow into the interior of the outer shell 11 and then flow out of the outer shell 11 through the outlet 112. That is, the outer shell 11 constitutes a channel for the flow of coke oven gas.

[0054] In this embodiment, outlet 112 is located above inlet 111. Since coke oven gas is mainly composed of hydrogen and methane, and contains small amounts of carbon monoxide and nitrogen, the density of these components is lower than that of air. This results in an overall density of coke oven gas that is less than that of air. The density difference between the two causes coke oven gas to have significant buoyancy in air, leading to an upward diffusion tendency. Therefore, by placing outlet 112 above inlet 111, the inherent characteristics of coke oven gas are utilized to allow it to flow upwards within the shell 11 and smoothly exit. Simultaneously, during the upward flow of coke oven gas, some of the dust, droplets, and other particulate impurities it carries can fall under its own gravity, thus achieving initial sedimentation of these impurities.

[0055] The inlet 111 and outlet 112 are arranged horizontally on opposite sides of the outer shell 11. This design makes the inlet 111 and outlet 112 symmetrically distributed in the horizontal direction, which can lengthen the horizontal flow range of coke oven gas inside the outer shell 11, which is conducive to the horizontal dispersion of coke oven gas inside the outer shell 11 and avoids the situation of excessive local pressure in the outer shell 11.

[0056] For example, the outer casing 11 includes a cylindrical body 113 and an ash collection hopper 114. The cylindrical body 113 is fixed to the top of the ash collection hopper 114, and the interior of the cylindrical body 113 communicates with the interior of the ash collection hopper 114.

[0057] Both the inlet 111 and the outlet 112 are located on the shell 113. Specifically, the inlet 111 is located at the lower part of the shell 113, and the outlet 112 is located at the upper part of the shell 113. Optionally, the inlet 111 is located at the bottom of the peripheral wall of the shell 113, and the outlet 112 is located on the side of the peripheral wall of the shell 113 near the top wall. This allows the inlet 111 and the outlet 112 to have a larger vertical distance, which can increase the vertical flow distance of the coke oven gas inside the shell 11, and help improve the initial sedimentation effect of some dust, mist droplets and other particulate impurities carried by the coke oven gas.

[0058] The dust collection hopper 114 is used to collect falling and settled particulate impurities such as dust and mist droplets for subsequent centralized treatment. The diameter of the dust collection hopper 114 gradually decreases from top to bottom. This design causes the inner peripheral wall of the dust collection hopper 114 to slope inward from top to bottom, which can guide the falling particulate impurities such as dust and mist droplets.

[0059] The bottom of the ash collection hopper 114 is provided with an ash outlet 115, through which particulate impurities such as dust and mist droplets can be discharged. Optionally, the ash collection hopper 114 is provided with a valve at the ash outlet 115 for controlling the opening and closing of the ash outlet 115.

[0060] In this embodiment, the dust removal device 1 also includes multiple support legs 14, which are fixed to the cylinder 113 at circumferential intervals. Each support leg 14 is located on the outer periphery of the ash collection hopper 114, and the multiple support legs 14 are used to jointly support the outer shell 11. The support legs 14 extend downward beyond the ash outlet 115. This design creates a gap between the ash outlet 115 and the bottom of the support leg 14 in the vertical direction, so that particulate impurities such as dust and mist droplets can be normally discharged outward through the ash outlet 115.

[0061] refer to Figure 2 The outer periphery of the filter element 12 is connected to the inner peripheral wall of the outer shell 11. The filter element 12 is located between the inlet 111 and the outlet 112. This design allows the coke oven gas entering the interior of the outer shell 11 from the lower inlet 111 to be filtered by the filter element 12 during the upward flow process, so as to block particulate impurities such as dust and mist droplets from continuing to move upward, thereby achieving dust removal of the coke oven gas.

[0062] Furthermore, the outer periphery of the filter element 12 is sealed to the inner peripheral wall of the outer shell 11 to prevent particulate impurities such as dust and mist droplets from passing through the gap between the filter element 12 and the inner peripheral wall of the outer shell 11, thereby ensuring that the coke oven gas flowing out through the outlet 112 is completely filtered and dust removed by the filter element 12.

[0063] Specifically, the filter element 12 includes a filter bag 122 and a fixing plate 121. The filter bag 122 has an open top and is hollow inside. The fixing plate 121 is arranged around the outer periphery of the filter bag 122 and fixed to the top of the filter bag 122. The outer periphery of the fixing plate 121 is fixedly connected and sealed to the inner peripheral wall of the outer shell 11.

[0064] The filter bag 122 is provided with multiple filter holes at intervals for coke oven gas to pass through. Under the action of the filter holes, particulate impurities such as dust and mist droplets in the coke oven gas can be blocked on the side of the filter bag 122 facing the inlet 111.

[0065] Because the top of the filter bag 122 is open and the inside is hollow, that is, the filter bag 122 is cylindrical, this makes it easier to increase the effective filtration area of ​​the filter bag 122, so as to improve the efficiency of filtration and dust removal.

[0066] The filter bags 122 can be multiple, and the multiple filter bags 122 are distributed at intervals inside the outer shell 11. At this time, the fixing plate 121 is provided with multiple through holes at intervals, and a filter bag 122 is provided at each through hole, and each through hole communicates with the top opening of the corresponding filter bag 122.

[0067] refer to Figure 1 and Figure 2The pulse air cannon 13 is connected to the inside of the outer shell 11. The pulse air cannon 13 is used to deliver pulse air inside the outer shell 11 to blow the filter element 12. Under the action of the pulse air, the particulate impurities attached to the filter element 12 can be shaken off, so as to achieve dust removal treatment of the filter element 12, improve the filtration efficiency and effect of the filter element 12, and thus realize the self-cleaning operation of the dust removal equipment 1.

[0068] In this embodiment, the pulse air cannon 13 includes an air cannon body 131 and a nozzle 132.

[0069] The air cannon body 131 is fixed to the outer peripheral wall of the housing 11. For example, a support frame 134 is fixed to the outer peripheral wall of the housing 11, and the air cannon body 131 is fixed to the support frame 134.

[0070] The air cannon body 131 is used to provide pulsed air. Specifically, the air cannon body 131 is provided with an air inlet and an air outlet that communicate with each other. The air inlet communicates with the outside and is used to allow air to enter the interior of the air cannon body 131. Under the action of the air cannon body 131, pulsed air can be generated. The air outlet communicates with the interior of the outer shell 11 and is used to allow pulsed air to enter the interior of the outer shell 11.

[0071] The nozzle 132 is located inside the housing 11. The nozzle 132 is vertically positioned above the inlet 111. The nozzle 132 is connected to the air outlet and the inside of the housing 11. That is, the pulsed air generated by the air cannon body 131 can be sprayed into the housing 11 through the nozzle 132 to purge the filter element 12.

[0072] Furthermore, the nozzle 132 is positioned vertically above the filter element 12. Specifically, the nozzle 132 is arranged corresponding to the top opening of the filter bag 122, which allows the pulsed air blown out by the nozzle 132 to enter the interior of the filter bag 122 from top to bottom, thereby achieving overall cleaning of the filter bag 122 and improving the cleaning effect and efficiency of the filter bag 122.

[0073] In this embodiment, there can be multiple nozzles 132, which are spaced apart inside the outer casing 11 and connected to the air outlet via a connecting pipe 133. At least one nozzle 132 of a pulse air cannon 13 is arranged at the top opening of the filter bag 122. One end of the connecting pipe 133 is connected to the air outlet of the air cannon body 131, and the other end extends horizontally into the cylinder 113 for connecting and installing the nozzles 132.

[0074] It should be noted that coke oven gas enters the interior of the outer shell 11 through inlet 111 and then moves upwards. When it reaches the filter bag 122, most or all of the dust, droplets, and other particulate impurities in the coke oven gas are blocked by the filter bag and cannot continue to move upwards. This ensures that the coke oven gas discharged from the outlet 112 of the outer shell 11 after dust removal by the dust removal equipment 1 contains only a small amount of dust or no dust or other particulate impurities. During or after the filtration and dust removal process, pulse air cannon 13 sprays pulse air into the outer shell 11 to blow away the dust, droplets, and other impurities attached to the filter bag 122, causing them to fall into the ash collection hopper 114, thus achieving the self-cleaning purpose of the dust removal equipment 1.

[0075] refer to Figure 1 and Figure 2 The demisting device 2 includes a housing 21, a spraying mechanism 22, and a demister 23.

[0076] The shell 21 is provided with an inlet 211 and an outlet 212 communicating with its interior. The inlet 211 is connected to the inlet 111 of the outer shell 11, so that the coke oven gas after being treated by the dust removal equipment 1 can flow into the interior of the shell 21 and subsequently flow out of the shell 21 through the outlet 212. Specifically, the inlet 211 is connected to the inlet 111 through a connecting pipe 25.

[0077] The discharge port 212 is located above the inlet 211. This design can adapt to the characteristics of coke oven gas, allowing it to flow upward inside the shell 21 and smoothly exit the shell 21.

[0078] The inlet 211 and the outlet 212 are arranged horizontally on opposite sides of the shell 21. This design makes the inlet 211 and the outlet 212 symmetrically distributed in the horizontal direction, which can extend the horizontal flow range of coke oven gas inside the shell 21, which is conducive to the horizontal dispersion of coke oven gas inside the shell 21 and avoids the situation of excessive local pressure in the shell 21.

[0079] The inlet 211 is located vertically spaced above the bottom wall of the housing 21, and a liquid storage chamber for storing flushing fluid is formed inside the housing 21 below the inlet 211.

[0080] For example, the housing 21 includes a housing body 213, which is hollow inside. An inlet 211 and an outlet 212 are disposed vertically on the housing body 213. Specifically, the inlet 211 is located at the lower part of the housing body 213, and the outlet 212 is located at the upper part of the housing body 213, so that the inlet 211 and the outlet 212 have a large vertical distance.

[0081] Inside the shell body 213, below the inlet 211, a reservoir for storing flushing fluid is formed. Optionally, the shell body 213 has a window communicating with the reservoir. A door 215 is provided at the window, movably connected to the shell body 213. The door 215 is used to open and close the window. This design facilitates operations such as adding or replacing flushing fluid, or cleaning the interior of the shell body 213. Specifically, one end of the door 215 is rotatably connected to the shell body 213.

[0082] Furthermore, the door 215 is sealed to the shell body 213 to improve the airtightness of the shell 21 and prevent leakage of coke oven gas, flushing fluid, etc.

[0083] The shell 21 also includes a guide portion 214 located on top of the shell body 213, the interior of which communicates with the interior of the shell body 213. The top wall of the guide portion 214, near the discharge port 212, slopes upwards towards the inlet 211. This design allows the top wall of the guide portion 214 to guide the coke oven gas, directing it to flow downwards along the top wall of the guide portion 214 towards the discharge port 212, thereby improving exhaust efficiency.

[0084] refer to Figure 1 and Figure 2 The defogging device 2 also includes multiple columns 26, which are spaced circumferentially at the bottom of the housing 21 and are used to support the housing 21 together.

[0085] refer to Figure 2 The spraying mechanism 22 is connected to the interior of the shell 21. The spraying mechanism 22 sprays flushing liquid into the shell 21 to flush the coke oven gas. During the flushing process, the flushing liquid reacts with harmful sulfides in the coke oven gas, generating harmless substances, thus achieving the purpose of removing sulfides. Simultaneously, the flushing process also adsorbs residual dust and other particulate impurities in the coke oven gas, improving the dust removal efficiency.

[0086] Specifically, the rinsing fluid is a liquid capable of neutralizing sulfides.

[0087] In this embodiment, the spraying mechanism 22 includes a spray pump 221 and a spraying component 222.

[0088] The spray pump 221 is arranged outside the housing 21 and is used to pump out the rinsing liquid. Exemplarily, the demisting device also includes a support 225, which is spaced apart from the housing 21, and the spray pump 221 is fixed on the support 225.

[0089] Specifically, the input end of the spray pump 221 is connected to the liquid storage chamber of the housing 21 via the input pipe 224. This design allows the spray mechanism 22 and the interior of the housing 21 to form a circulation loop, thereby enabling the reuse of the neutralizing liquid in the storage chamber until the neutralizing liquid reaches near-saturation due to the absorption of sulfides, thus improving the utilization rate of the neutralizing liquid. Optionally, a filter screen is provided inside the input pipe 224 to filter impurities in the neutralizing liquid, ensuring that the neutralizing liquid entering the spray pump 221 through the input pipe 224 does not contain particulate impurities, thereby ensuring the normal operation of the spray pump 221 and extending its service life.

[0090] It should be noted that the neutralizing liquid in the storage chamber is basically or completely saturated due to the absorption of sulfides, or the neutralizing liquid can be replaced according to actual needs to ensure the normal function of the spray mechanism 22.

[0091] The spray element 222 is located inside the shell 21 and above the inlet 211. The spray element 222 is connected to the output end of the spray pump 221 via the spray pipe 223, and is also connected to the interior of the shell 21. This design allows the coke oven gas entering the shell 21 from the lower inlet 211 to be flushed by the flushing liquid sprayed from top to bottom by the spray element 222 as it flows upwards, thus achieving desulfurization of the coke oven gas. Furthermore, during the flushing process, residual dust and other particulate impurities in the coke oven gas can also be adsorbed, improving the dust removal efficiency of the coke oven gas.

[0092] The system comprises multiple spray elements 222, which are spaced apart inside the housing 21 and connected to the output of the spray pump 221 via a spray pipe 223. Specifically, the multiple spray elements 222 are evenly spaced in the horizontal direction to ensure that the flushing liquid sprayed by the multiple spray elements 222 can cover the internal space of the housing 21 in the horizontal direction. This ensures that the coke oven gas flowing out of the discharge port 212 is completely flushed by the flushing liquid, thereby improving the purification rate of the coke oven gas flowing out of the discharge port 212.

[0093] refer to Figure 2 The demister 23 is located between the inlet 211 and the outlet 212. The outer periphery of the demister 23 is connected to the inner peripheral wall of the shell 21. The demister 23 is used to eliminate mist in the coke oven gas after dust removal treatment.

[0094] In this embodiment, the demister 23 is vertically positioned above the spray element 222. This design ensures that the coke oven gas entering the housing 21 through the inlet 211 is first flushed with a flushing liquid. During the flushing process, sulfides in the coke oven gas are removed, and residual dust and other impurities are adsorbed. This prevents particulate impurities such as dust from entering the interior of the demister 23 located above the spray element 222, avoiding blockage and ensuring the demisting effect of the demister 23. Furthermore, since the coke oven gas has a certain temperature, some of the flushing liquid vaporizes due to heat absorption during the flushing process. At this time, the demister 23, positioned above the spray element 222, eliminates the original oil mist in the coke oven gas after dust removal treatment, and also eliminates the water vapor generated during flushing. That is, the mist removed by the demister 23 includes oil mist, water vapor, etc.

[0095] The outer periphery of the demister 23 is also sealed to the inner peripheral wall of the shell 21 to prevent coke oven gas carrying mist from passing through the gap between the demister 23 and the inner peripheral wall of the shell 21. This ensures that the coke oven gas flowing out through the discharge port 212 is completely demisted by the demister 23, so that the coke oven gas that is finally demisted and discharged through the discharge port 212 does not contain mist.

[0096] Figure 3 This is a cross-sectional view of the demister 23 in this embodiment.

[0097] refer to Figure 2 and Figure 3 The demister 23 includes a frame 231 and multiple demister plates 232.

[0098] The outer periphery of the frame 231 is fixedly and sealed to the inner peripheral wall of the shell 21. The frame 231 is a hollow structure with both the upper and lower ends open.

[0099] Multiple demisters 232 are fixed at intervals along the horizontal direction inside the frame 231. Two adjacent demisters 232 enclose each other to form a vertically penetrating flow channel for coke oven gas to pass through.

[0100] Figure 4 for Figure 3 Enlarged structural diagram at point B.

[0101] refer to Figure 3 and Figure 4In this embodiment, each demister plate 232 has a corrugated structure. This design allows adjacent demister plates 232 to form a curved, vertically connected flow channel. That is, the demister 23 utilizes the corrugated structure of the demister plates 232. When coke oven gas carrying mist enters the curved flow channel, the upward-moving mist impacts and adheres to the corrugated demister plates 232. After a certain accumulation and condensation, the mist forms larger droplets, which then slide off the demister plates 232 under gravity, thus achieving gas-liquid separation and demisting.

[0102] Specifically, the defogger 232 includes a main body 2321 and corrugated portions 2322 located at the upper and lower ends of the main body 2321. Both the main body 2321 and the corrugated portions 2322 are arc-shaped, and the convex surfaces of both the main body 2321 and the corrugated portions 2322 are arranged horizontally. Furthermore, the convex surfaces of the two corrugated portions 2322 face the same direction, while the convex surfaces of the main body 2321 and the corrugated portions 2322 face opposite directions. Figure 4 Taking the direction shown as an example, with the convex surface to the left as convex, that is, the demister plate 232 has a concave-convex-concave waveform structure along the vertical direction. The above design makes the demister plate 232 have a multi-fold waveform structure, so that the demister plate 232 has multiple convex surfaces and multiple concave surfaces. When the coke oven gas with mist enters the curved flow channel, the upward-moving mist will collide with and adhere to the convex and concave surfaces of the demister plate 232. The multi-convex surface design of the demister plate 232 can increase the chance of mist being captured. The mist that is not captured is captured by the same action at the next convex or concave surface. Under the action of inertial force and gravity, the mist in the coke oven gas is separated. This design improves the demisting efficiency.

[0103] Of course, the defogger 232 can also adopt other waveform structures formed by a combination of one or more sets of concave-convex forms.

[0104] In this embodiment, the demister 23 further includes multiple folded plates 233. Each demister 232 is provided with at least one folded plate 233. The folded plates 233 extend into the flow channel and enclose the demister 232 to form a downward-opening demisting space. Since a small portion of the coke oven gas containing mist may not reach the demister 232 during the flow through the curved flow channel, thus preventing demisting of this portion of the gas, the folded plates 233 are provided on the demister 232 and extend into the flow channel. This allows the folded plates 233 to reach the small portion of the coke oven gas, causing the mist in this portion of the gas to collide with and adhere to the folded plates 233, increasing the chance of mist capture and improving demisting efficiency.

[0105] For example, each demister plate 232 is provided with a corresponding folded plate 233, which is disposed on the convex surface of the main body 2321, and the folded plate 233 and the main body 2321 enclose a downward-opening demister space. This design allows the airflow to accelerate as it passes through the convex surface of the main body 2321 due to the narrowing of the flow channel. Under the guiding effect of the concave surface of the corrugated portion 2322 below the main body 2321, a swirling flow is generated. The swirling flow blows a small portion of the coke oven gas into the space between the folded plate 233 and the convex surface of the main body 2321, thereby achieving demistering.

[0106] In other embodiments, each defogging plate 232 is provided with a corresponding folded plate 233, and the folded plate 233 can be disposed on the convex surface of any waveform section 2322.

[0107] In some embodiments, each demister plate 232 may also be provided with two folded plates 233, in which case the two folded plates 233 may be arranged one-to-one on two of the convex surfaces of the demister plate 232. Alternatively, each demister plate 232 may also be provided with three folded plates 233, in which case the three folded plates 233 may be arranged one-to-one on three convex surfaces of the demister plate 232.

[0108] In this embodiment, each folded plate 233 is bent. Specifically, the folded plate 233 includes a connecting portion and a folded portion. The connecting portion is fixed to the convex surface of the main body 2321 and protrudes horizontally from the main body 2321. The folded portion is fixed to the end of the connecting portion opposite to the main body 2321 and protrudes downward from the connecting portion. That is, the folded portion, the connecting portion, and the main body 2321 enclose a downward-opening defogging space.

[0109] refer to Figure 2 The demisting device 2 also includes a demister 24, which is located inside the housing 21 and below the spray element 222. Furthermore, the demister 24 is located above the inlet 211. This design allows the demister 24, located below the spray element 222, to block adsorbed particulate impurities such as dust and droplets from continuing to rise with the coke oven gas when the spray element 222 sprays flushing liquid into the housing 21.

[0110] Specifically, the demister 24 includes a frame 241 and a mesh 242. The outer periphery of the frame 241 is fixedly and sealed to the inner peripheral wall of the shell 21 to prevent coke oven gas from passing through the gap between the frame 241 and the shell 21. The frame 241 is a hollow structure with both ends open. The mesh 242 is located inside the frame 241 and has multiple mesh openings spaced apart to allow gas to pass through.

[0111] Because the demister 24 covers the horizontal cross-section of the shell 21 in the horizontal direction, and because the demister 24 is located below the spray element 222, this design allows the mesh 242 of the demister 24 to act as an intermediate medium to further disperse the spray liquid sprayed by the spray element 222. This breaks large droplets into atomized particles, thereby increasing the coverage area of ​​the flushing liquid and the contact area between the flushing liquid and the coke oven gas, accelerating the neutralization reaction between the flushing liquid and sulfides. Simultaneously, the mesh structure of the mesh 242 can also slow down the flow rate of the coke oven gas to a certain extent, thus prolonging the contact time between the coke oven gas and the flushing liquid, allowing the sulfides and flushing liquid to react fully, ensuring that the coke oven gas flowing upwards is free of harmful sulfides. Furthermore, the structure of the mesh 242 can also block particulate impurities such as dust captured by the flushing liquid, preventing them from continuing to flow upwards, thereby improving the dust removal effect.

[0112] It should be noted that the coke oven gas, after being treated by the dust removal equipment 1, enters the interior of the shell 21 through the inlet 211 and then moves upward. The spray mechanism 22 and the demister 24 work together to remove harmful substances such as sulfides from the coke oven gas. The desulfurized coke oven gas then continues to move upward through the demister 23. The multi-directional waveform structure of the demister 23 removes mist from the coke oven gas, ensuring that the coke oven gas that has undergone demisting treatment and is discharged through the outlet 212 is free of mist.

[0113] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A dust removal and demisting device, characterized in that, include: A dust removal device includes a housing, a filter element, and a pulse air cannon. The housing has an inlet and an outlet communicating with its interior, with the outlet located above the inlet. The outer periphery of the filter element is connected to the inner peripheral wall of the housing, and the filter element is located between the inlet and the outlet. The filter element is used to filter particulate impurities. The pulse air cannon is connected to the interior of the housing, and the pulse air cannon is used to deliver pulsed air into the housing to purge the filter element; A demisting device includes a housing, a spraying mechanism, and a demister. The housing has an inlet and an outlet communicating with its interior. The inlet is connected to the outlet of the outer shell. The outlet is located above the inlet. The spraying mechanism is connected to the interior of the housing and is used to spray flushing liquid into the housing. The demister is located between the inlet and the outlet, and its outer periphery is connected to the inner peripheral wall of the outer shell. The demister is used to eliminate fog.

2. The dust removal and demisting device according to claim 1, characterized in that, The pulse air cannon includes an air cannon body and a nozzle. The air cannon body is fixed to the outer peripheral wall of the outer shell. The air cannon body is provided with a communicating air inlet and an air outlet. The air inlet communicates with the outside. The air cannon body is used to provide pulse air. The nozzle is located inside the housing and is positioned vertically above the inlet. The nozzle communicates with the air outlet and the interior of the housing.

3. The dust removal and demisting device according to claim 2, characterized in that, The nozzle is located vertically above the filter element; The number of nozzles is multiple, and the multiple nozzles are distributed at intervals inside the housing. The multiple nozzles are connected to the air outlet through a connecting pipe.

4. The dust removal and demisting device according to claim 1, characterized in that, The filter element includes a filter bag and a fixing plate. The filter bag has an open top and is hollow inside, and has a plurality of filter holes spaced apart on it. The fixing plate is arranged around the outer periphery of the filter bag and fixed to the top of the filter bag. The outer periphery of the fixing plate is fixedly and sealed to the inner peripheral wall of the outer shell. The top opening of the filter bag is provided with at least one nozzle of the pulse air cannon.

5. The dust removal and demisting device according to claim 1, characterized in that, The inlet and the outlet are arranged horizontally on opposite sides of the outer casing; The outer shell includes a cylindrical body and a dust collection hopper. The cylindrical body is fixed to the top of the dust collection hopper, and the interior of the cylindrical body communicates with the interior of the dust collection hopper. The inlet and the outlet are located on the cylindrical body. The diameter of the dust collection hopper gradually decreases from top to bottom, and the bottom of the dust collection hopper is provided with a dust outlet. The dust removal equipment also includes multiple support legs, which are fixed to the cylinder at circumferential intervals, and each support leg is located on the outer periphery of the ash collection hopper, with the support legs extending downward beyond the ash outlet.

6. The dust removal and demisting device according to claim 1, characterized in that, The spraying mechanism includes a spray pump and a spraying component. The spray pump is arranged outside the housing and is used to pump out rinsing liquid. The spraying component is located inside the housing and above the inlet. The spraying component is connected to the output end of the spray pump through a spray pipe and is in communication with the inside of the housing. The inlets are located vertically spaced above the bottom wall of the housing, and a storage chamber for storing rinsing fluid is formed inside the housing below the inlets; the input end of the spray pump is connected to the storage chamber through an input pipe.

7. The dust removal and demisting device according to claim 1, characterized in that, The spraying mechanism includes spraying elements disposed inside the housing; The demister is located vertically above the spray element; the outer periphery of the demister is sealed to the inner peripheral wall of the housing; The demister includes a frame and multiple demister plates; the outer periphery of the frame is fixedly and sealed to the inner peripheral wall of the housing; the upper and lower ends of the frame are open; the multiple demister plates are fixedly fixed inside the frame at intervals along the horizontal direction, and adjacent demister plates enclose each other to form a vertically open flow channel.

8. The dust removal and demisting device according to claim 7, characterized in that, The demister also includes multiple folded plates, each of which is provided with at least one folded plate. The folded plates extend into the flow channel, and the folded plates and the demister together form a downward-opening demister space. Each of the aforementioned demisters has a corrugated structure; each of the aforementioned folded plates is bent.

9. The dust removal and demisting device according to claim 1, characterized in that, The spraying mechanism includes spraying elements disposed inside the housing; The demisting device also includes a demister, which is disposed inside the housing and located below the spray element; the demister is located above the inlet; The demister includes a frame and a mesh. The outer periphery of the frame is fixedly and sealed to the inner peripheral wall of the housing. The upper and lower ends of the frame are connected. The mesh is located inside the frame and has multiple mesh holes spaced apart for gas to pass through.

10. The dust removal and demisting device according to claim 1, characterized in that, The inlet and the outlet are arranged horizontally on opposite sides of the housing; The shell includes a shell body, the interior of which is hollow; the inlet and the outlet are disposed vertically on the shell body; The shell body has a reservoir cavity for storing flushing fluid formed below the inlet; the shell body has a window communicating with the reservoir cavity; a door is provided at the window, the door is movably connected to the shell body, and the door is used to open and close the window; The housing also includes a guide portion located at the top of the housing body, the interior of which communicates with the interior of the housing body; the top wall of the guide portion near the discharge port slopes upward toward the inlet from bottom to top.

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