Power plant waste gas treatment device

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a power plant waste gas treatment device which comprises a middle fixed cylinder, a movable cylinder which has the same diameter as the middle fixed cylinder and can move up and down is arranged right above the middle fixed cylinder, the top of the movable cylinder is movably connected with a gas inlet pipeline, and a first filter screen is arranged between the middle fixed cylinder and the movable cylinder. The side wall of the first filter screen is connected with a second filter screen through a middle rotating plate, a cleaning assembly is arranged above the second filter screen, the first filter screen and the second filter screen rotate around the middle of the middle rotating plate, the lower end of the middle fixing cylinder is connected with an exhaust cylinder, and an air outlet in the lower end of the exhaust cylinder extends into the filter reservoir. In this way, the self-cleaning function of the treatment device is achieved, the filtering efficiency is improved, secondly, the treatment device adopts a multi-stage progressive filtering mode to treat exhausted waste gas, the filtering effect is good, all the filtering assemblies are convenient to assemble, disassemble, replace and maintain, and worry and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas treatment device for power plants. Background Art

[0002] The waste gas of thermal power plants mainly comes from the flue gas generated by boiler combustion, the exhaust gas from the intermediate ash bin in the pneumatic ash conveying system, the dust-containing waste gas generated in the coal yard, and the coal dust generated in the coal yard, raw coal crushing and coal conveying. In the waste gas discharge pipeline of the prior art, a filter screen is installed to filter the waste gas, so that the dust in the waste gas adheres to the filter screen, avoiding the dust from being discharged into the atmosphere along with the waste gas and affecting the environment around the power plant. However, a large amount of particles will remain on the filter screen during the long-term filtering of the waste gas. When too much garbage adheres to the surface of the filter screen, it will affect the air permeability of the filter screen, thereby affecting the filtering efficiency. Therefore, it is necessary for the staff to disassemble and clean the filter screen. Although there are some self-cleaning filtering devices on the market at present, they consume a large amount of energy and have a poor cleaning effect. In view of this problem, there is an urgent need for a waste gas treatment device for power plants that can self-clean. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a waste gas treatment device for power plants, which can solve the above technical problems.

[0004] The utility model provides a waste gas treatment device for power plants, including an intermediate fixed cylinder. A movable cylinder with the same diameter as the intermediate fixed cylinder and capable of moving up and down is arranged directly above the intermediate fixed cylinder. The top of the movable cylinder is movably connected with an intake pipe. A first filter screen is arranged between the intermediate fixed cylinder and the movable cylinder. The side wall of the first filter screen is connected with a second filter screen through an intermediate rotating plate. A cleaning component is arranged above the second filter screen. The first filter screen and the second filter screen rotate around the middle of the intermediate rotating plate. The lower end of the intermediate fixed cylinder is connected with an exhaust cylinder, and the lower end air outlet of the exhaust cylinder extends into a filtering reservoir.

[0005] Further, a sliding sealing ring is arranged on the inner circular wall of the top end cover of the movable cylinder, and the intake pipe is inserted into the sliding sealing ring and is slidably connected with it.

[0006] Further, a driving component for moving the movable cylinder up and down is arranged on the outer wall of the intermediate fixed cylinder. The driving component includes a fixed guiding seat located on the outer wall of the intermediate fixed cylinder and fixedly connected with it. A guiding frame is fixedly connected to the outer wall of the movable cylinder. The vertical part of the guiding frame is inserted into the fixed guiding seat and is slidably connected with it. A motor slot is arranged inside the fixed guiding seat. An adjusting motor is arranged in the motor slot. The output shaft of the adjusting motor is fixedly connected with an adjusting screw rod. A transmission connecting rod is arranged on the inner side wall of the vertical part of the guiding frame. The adjusting screw rod passes through the transmission connecting rod and is threadedly connected with it.

[0007] Further, on one side of the outer wall of the middle fixed cylinder opposite to the fixed guide seat, an extension plate is fixedly connected. A rotary motor is fixedly connected to the extension plate. The output shaft of the rotary motor is fixedly connected with a rotary column, and the rotary column is connected to the middle of the middle rotary plate.

[0008] Further, the middle of the middle rotary plate is sleeved on the rotary column. A positioning plate is fixedly connected to the side wall of the rotary column. A positioning bolt is fixedly connected to the upper surface of the positioning plate. The positioning bolt passes through the middle rotary plate and presses the middle rotary plate against the positioning plate through a nut.

[0009] Further, both the first filter screen and the second filter screen are circular filter screens. A sealing circle is provided at the outer edge of the circular filter screen. The movable cylinder is hermetically connected to the middle fixed cylinder by pressing down on the sealing circle.

[0010] Further, the cleaning assembly includes an extension rod provided on one side of the outer wall of the movable cylinder opposite to the guide frame. The outer end of the extension rod is rotatably connected with a cleaning rotating shaft. The cleaning rotating shaft is aligned with the center of the second filter screen. A plurality of brush rods with cleaning brushes are fixedly connected to the lower end of the cleaning rotating shaft. A windward plate is fixedly connected to the upper end of the cleaning rotating shaft.

[0011] Further, the lower part of the middle fixed cylinder is connected to a cylindrical connecting part. The inner wall of the lower end of the cylindrical connecting part has internal threads. The outer wall of the upper end of the exhaust cylinder is provided with external threads matching the internal threads.

[0012] Further, the exhaust cylinder is funnel-shaped. A plurality of evenly distributed clamping sleeves are provided on the inclined inner wall of the exhaust cylinder. An electrostatic dust collection tube is provided in the clamping sleeve.

[0013] Further, a filter sponge is provided in the filter reservoir. The filter sponge is sleeved on the lower air outlet of the exhaust cylinder. The filter sponge is suspended in the water in the filter reservoir and covers the entire water surface. A baffle is provided at the top of the filter reservoir. The filter sponge abuts against the lower surface of the baffle.

[0014] Beneficial effects:

[0015] In the present utility model, the first filter screen is placed between the middle fixed cylinder and the movable cylinder, and the movable cylinder can move up and down. In addition, the first filter screen is also connected to a second filter screen, and a cleaning component is provided above the second filter screen. The first filter screen and the second filter screen can also rotate around the middle of the middle rotating plate. When the air permeability of the first filter screen decreases, the movable cylinder is moved upward, and then the first filter screen and the second filter screen rotate together. The first filter screen goes to the original position of the second filter screen, and the second filter screen takes the place of the first filter screen between the movable cylinder and the middle fixed cylinder. The cleaning component cleans the first filter screen with decreased air permeability, thus realizing the self-cleaning function of the treatment device, improving the filtration efficiency. Secondly, the treatment device adopts a multi-stage progressive filtration method to treat waste gas, with good filtration effect, and it is convenient to assemble, disassemble, replace and maintain between its various filter components, saving worry and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the waste gas treatment device for power plants of the present utility model;

[0018] Figure 2 is Figure 1 an enlarged schematic diagram at A;

[0019] Figure 3 It is an internal sectional view of the waste gas treatment device for power plants of the present utility model.

[0020] Description of the reference numerals in the drawings: 1 - intake pipeline, 2 - movable cylinder, 21 - top end cover, 211 - sliding sealing ring, 22 - guiding frame, 23 - transmission connecting rod, 24 - extension rod, 25 - cleaning rotating shaft, 251 - windward plate, 26 - brush rod, 261 - cleaning brush, 3 - middle fixed cylinder, 31 - cylindrical connecting part, 311 - internal thread, 32 - fixed bracket, 33 - fixed guiding seat, 331 - motor slot, 34 - adjusting motor, 341 - adjusting lead screw, 35 - extension plate, 36 - rotating motor, 37 - rotating column, 371 - positioning plate, 372 - positioning bolt, 373 - nut, 38 - middle rotating plate, 3901 - first filter screen, 3902 - second filter screen, 391 - sealing circle, 4 - exhaust cylinder, 41 - external thread, 42 - ferrule, 43 - electrostatic precipitator tube, 5 - filter reservoir, 51 - baffle, 6 - filter sponge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Embodiment 1

[0025] An exhaust gas treatment device for a power plant, as Figures 1-3As shown in the figure, it includes a middle fixed cylinder 3. A fixed bracket 32 is fixedly connected to the side wall of the middle fixed cylinder 3. Above the middle fixed cylinder 3, there is a movable cylinder 2 with the same diameter as it and capable of moving up and down. On the inner circular wall of the top end cover 21 of the movable cylinder 2, there is a sliding sealing ring 211. The air inlet pipe 1 is inserted into the sliding sealing ring 211 and is slidably connected to it. Between the middle fixed cylinder 3 and the movable cylinder 2, there is a first filter screen 3901. The side wall of the first filter screen 3901 is connected to a second filter screen 3902 through a middle rotating plate 38. Both the first filter screen 3901 and the second filter screen 3902 are circular filter screens. A sealing circle 391 is provided at the outer edge of the circular filter screen. The movable cylinder 2 realizes the sealed connection with the middle fixed cylinder 3 by moving down and pressing against the sealing circle 391. Above the second filter screen 3902, there is a cleaning component. The first filter screen 3901 and the second filter screen 3902 rotate around the middle of the middle rotating plate 38. The lower end of the middle fixed cylinder 3 is connected to an exhaust cylinder 4, and the lower air outlet of the exhaust cylinder 4 extends into the filter reservoir 5.

[0026] Specifically, on the outer wall of the middle fixed cylinder 3, there is a driving component for moving the movable cylinder 2 up and down. The driving component includes a fixed guiding seat 33 located on the outer wall of the middle fixed cylinder 3 and fixedly connected to it. A guiding frame 22 is fixedly connected to the outer wall of the movable cylinder 2. The guiding frame 22 is an L-shaped structure. The vertical part of the guiding frame 22 is inserted into the fixed guiding seat 33 and is slidably connected to it. Inside the fixed guiding seat 33, there is a motor slot 331. An adjusting motor 34 is provided in the motor slot 331. The output shaft of the adjusting motor 34 is fixedly connected to an adjusting lead screw 341. A transmission connecting rod 23 is provided on the inner side wall of the vertical part of the guiding frame 22. The adjusting lead screw 341 passes through the transmission connecting rod 23 and is threadedly connected to it.

[0027] On the side of the outer wall of the middle fixed cylinder 3 opposite to the fixed guiding seat 33, an extension plate 35 is fixedly connected. A rotating motor 36 is fixedly connected to the extension plate 35. The output shaft of the rotating motor 36 is fixedly connected to a rotating column 37. The middle of the rotating column 37 is connected to the middle of the middle rotating plate 38. The middle of the middle rotating plate 38 is sleeved on the rotating column 37. A positioning plate 371 is fixedly connected to the side wall of the rotating column 37. A positioning bolt 372 is fixedly connected to the upper surface of the positioning plate 371. The positioning bolt 372 passes through the middle rotating plate 38 and presses the middle rotating plate 38 against the positioning plate 371 through a nut 373.

[0028] The cleaning component includes an extension rod 24 provided on the side of the outer wall of the movable cylinder 2 opposite to the guiding frame 22. The outer end of the extension rod 24 is rotatably connected to a cleaning rotating shaft 25. The cleaning rotating shaft 25 is directly opposite to the center of the second filter screen 3902. A plurality of brush rods 26 with cleaning brushes 261 are fixedly connected to the lower end of the cleaning rotating shaft 25. A windward plate 251 is fixedly connected to the upper end of the cleaning rotating shaft 25. The windward plate 251 can also be replaced by a motor.

[0029] The lower end of the middle fixed cylinder 3 is connected to a cylinder connection part 31 with a larger diameter. The inner wall of the lower end of the cylinder connection part 31 has an internal thread 311. The outer wall of the upper end of the exhaust cylinder 4 is provided with an external thread 51 that matches the internal thread 311. The exhaust cylinder 4 is funnel-shaped, and a plurality of evenly distributed clamping sleeves 42 are provided on the inclined inner wall of the exhaust cylinder 4. An electrostatic dust collection tube 43 is arranged in the clamping sleeve 42. The electrostatic dust collection tube 43 further fully contacts the waste gas passing through the filter screen to absorb dust with smaller particles.

[0030] A filter sponge 6 is arranged in the filter storage tank 5. The filter sponge 6 is sleeved on the lower end air outlet of the exhaust cylinder 4. The filter sponge 6 floats in the water in the filter storage tank 5 and covers the entire water surface. A baffle 51 is provided at the top of the filter storage tank 5. The filter sponge 6 abuts against the lower surface of the baffle 51. The gas coming out of the exhaust cylinder 4 is finally filtered through the filter storage tank 5 and the filter sponge 6.

[0031] The adjustment motor 34 and the rotation motor 36 can be purchased on the market. The adjustment motor 34 and the rotation motor 36 are equipped with power supplies, which are mature technologies in this field and have been fully disclosed. Therefore, they are not repeated in the specification.

[0032] The working principle of the present utility model:

[0033] The waste gas coming out of the intake pipe 1 is first preliminarily filtered through a circular filter screen. The circular filter screen has two (i.e., the first filter screen 3901 and the second filter screen 3902) and can be replaced movably. When replacing, the separation of the movable cylinder 2 and the middle fixed cylinder 3 is realized through the adjustment motor 34, and then the internal and external replacement of the circular filter screen is realized through the rotation motor 36. The dirty circular filter screen will be washed under the action of the cleaning brush 261, and the cleaning brush 261 rotates by driving the windward plate 251 through natural wind. The gas passing through the circular filter screen reaches the exhaust cylinder 4 through the middle fixed cylinder 3, and smaller dust is filtered out again after sufficient contact with the electrostatic dust collection tube 43. After long-term use, the exhaust cylinder 4 and the electrostatic dust collection tube 43 can be taken out separately for cleaning. Finally, the gas passing through the exhaust cylinder 4 is introduced into the filter storage tank 5 to contact with water for filtration, and then the final filtration is completed through the filter sponge 6 for discharge.

[0034] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An exhaust gas treatment device for a power plant, characterized in that It includes an intermediate fixed cylinder. There is an activity cylinder directly above the intermediate fixed cylinder, which has the same diameter as it and can move up and down. The top of the activity cylinder is movably connected to an intake pipe. A first filter screen is arranged between the intermediate fixed cylinder and the activity cylinder. The side wall of the first filter screen is connected to a second filter screen through an intermediate rotating plate. A cleaning component is arranged above the second filter screen. The first filter screen and the second filter screen rotate around the middle of the intermediate rotating plate. The lower end of the intermediate fixed cylinder is connected to an exhaust cylinder, and the lower end air outlet of the exhaust cylinder extends into a filtering reservoir.

2. The power plant waste gas treatment device according to claim 1, characterized in that, A sliding sealing ring is arranged on the inner circular wall of the top end cover of the activity cylinder. The intake pipe is inserted into the sliding sealing ring and is slidably connected to it.

3. The power plant waste gas treatment device according to claim 2, characterized in that, A driving component for moving the activity cylinder up and down is arranged on the outer wall of the intermediate fixed cylinder. The driving component includes a fixed guiding seat located on the outer wall of the intermediate fixed cylinder and fixedly connected to it. A guiding frame is fixedly connected to the outer wall of the activity cylinder. The vertical part of the guiding frame is inserted into the fixed guiding seat and is slidably connected to it. A motor slot is arranged inside the fixed guiding seat. An adjusting motor is arranged in the motor slot. The output shaft of the adjusting motor is fixedly connected to an adjusting lead screw. A transmission connecting rod is arranged on the inner side wall of the vertical part of the guiding frame. The adjusting lead screw passes through the transmission connecting rod and is threadedly connected to it.

4. The power plant waste gas treatment device according to claim 3, characterized in that, An extension plate is fixedly connected to the side of the outer wall of the intermediate fixed cylinder opposite to the fixed guiding seat. A rotating motor is fixedly connected to the extension plate. The output shaft of the rotating motor is fixedly connected to a rotating column. The rotating column is connected to the middle of the intermediate rotating plate.

5. The power plant waste gas treatment device according to claim 4, characterized in that, The middle of the intermediate rotating plate is sleeved on the rotating column. A positioning plate is fixedly connected to the side wall of the rotating column. A positioning bolt is fixedly connected to the upper surface of the positioning plate. The positioning bolt passes through the intermediate rotating plate and presses the intermediate rotating plate against the positioning plate through a nut.

6. The power plant waste gas treatment device according to claim 1, characterized in that, Both the first filter screen and the second filter screen are circular filter screens. A sealing circle is arranged on the outer edge of the circular filter screen. The activity cylinder realizes sealed connection with the intermediate fixed cylinder by moving down to press against the sealing circle.

7. The power plant waste gas treatment device according to claim 3, characterized in that The cleaning component includes an extension rod arranged on the side of the outer wall of the activity cylinder opposite to the guiding frame. The outer end of the extension rod is rotatably connected to a cleaning rotating shaft. The cleaning rotating shaft is directly opposite to the center of the second filter screen. A plurality of brush rods with cleaning brushes are fixedly connected to the lower end of the cleaning rotating shaft. A windward plate is fixedly connected to the upper end of the cleaning rotating shaft.

8. The power plant waste gas treatment device according to claim 1, characterized in that, The lower part of the intermediate fixed cylinder is connected to a cylindrical connecting part. The inner wall of the lower end of the cylindrical connecting part has internal threads. The outer wall of the upper end of the exhaust cylinder is provided with external threads matching the internal threads.

9. The power plant waste gas treatment device according to claim 8, wherein, The exhaust cylinder is in a funnel shape. A plurality of evenly distributed clamping sleeves are arranged on the inclined inner wall of the exhaust cylinder. Electrostatic dust collection tubes are arranged inside the clamping sleeves.

10. The power plant waste gas treatment device according to claim 1, characterized in that, Filter sponges are arranged in the filtering reservoir. The filter sponges are sleeved on the lower end air outlet of the exhaust cylinder. The filter sponges are suspended in the water in the filtering reservoir and cover the entire water surface. A baffle is arranged at the top of the filtering reservoir. The filter sponges are abutted against the lower surface of the baffle.

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