A low-emission flue gas purification device for thermal power plants

Abstract

The present invention discloses a low-emission flue gas purification device for a thermal power plant, belonging to the technical field of flue gas purification devices, including a housing frame. Inside the housing frame, a first valve housing and a second valve housing are fixedly connected. Inside the first valve housing, a first valve plate is swingably installed. Inside the second valve housing, a second valve plate is rotatably installed. A filter element is inserted inside the housing frame, and the lower part of the filter element is in snap-fit with the lower part of the housing frame. The first valve plate includes a first rotating shaft, a first plate body, and a first push plate. When replacing the filter element, one of the filter elements is removed, so that the first valve plate closes the opening of the first valve housing downward by means of gravity. At the same time, the air pressure inside the first valve housing and the second valve housing is used to further press and close the first valve plate and the second valve plate. The second valve plate is made to droop and reset by gravity, so that the second valve plate closes the opening of the second valve housing, and the gas continues to be filtered through the other filter element, facilitating the direct replacement of the filter element during the working process.

Description

Technical Field

[0001] The present invention belongs to the technical field of flue gas purification equipment, and particularly relates to a low-emission flue gas purification equipment for thermal power plants. Background Art

[0002] Flue gas refers to the flue gas formed at the suction end of a cigarette removed in a closed system; when a cigarette is smoked, the flue gas at the suction end in the self-ignition state.

[0003] Due to the continuous operation of thermal power plants, when the filter element in the filtering equipment expires, it is necessary to divert the flue gas and then replace the filter element. After replacing it into the filterless discharge pipeline, the pollution discharge is relatively high. Closing the discharge will affect the normal operation of the power plant, thus causing a relatively large problem of pollution discharge when replacing the filter element of the flue gas discharge equipment of conventional thermal power plants.

[0004] For this reason, we propose a low-emission flue gas purification equipment for thermal power plants to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem of relatively large pollution discharge when replacing the filter element of the flue gas discharge equipment of conventional thermal power plants, and to propose a low-emission flue gas purification equipment for thermal power plants.

[0006] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0007] A low-emission flue gas purification equipment for thermal power plants includes an outer shell frame. A first valve housing and a second valve housing are fixedly connected inside the outer shell frame. A first valve plate is swingably installed inside the first valve housing, and a second valve plate is rotatably installed inside the second valve housing. A filter element is inserted into the outer shell frame, and the lower part of the filter element is in clamping fit with the lower part of the outer shell frame; the first valve plate includes a first rotating shaft, a first plate body and a first push plate. The first rotating shaft is fixedly connected to the outside of the first plate body, and the first push plate is fixedly connected to the lower end of the first plate body. The first push plate is in movable contact with the filter element. Insert the filter element into the outer shell frame, so that the filter element pushes open the first valve plate and the second valve plate, and the passage of the filter element is connected to the first valve housing and the second valve housing. When replacing the filter element, remove one of the filter elements, so that the first valve plate closes the opening of the first valve housing by gravity. At the same time, use the air pressure inside the first valve housing and the second valve housing to further press and close the first valve plate and the second valve plate, and use gravity to make the second valve plate droop and reset, so that the second valve plate closes the opening of the second valve housing, and the gas continues to be filtered through the other filter element, which is convenient for directly replacing the filter element during the working process. When the filter element is pulled out, use the weight of the first plate body to make the first plate body droop, so that the first push plate extends downward, and use the first plate body to shield the ventilation port; after inserting the filter element into the outer shell frame, use the filter element to push the first push plate upward, so that the first plate body turns upward, and connect the filter element and the ventilation port, which is convenient for automatic opening and closing.

[0008] Preferably, the outer shell frame includes a gas guide hood, an outer restraint hood is fixedly connected to the outside of the gas guide hood, and a guiding groove is formed in the lower part of the restraint hood. The gas guide hood is used to guide the flue gas into the first valve housing and discharge it into the filter element through the first valve housing, then through the filter element into the second valve housing, and discharged from the other side of the second valve housing into the filter element on the other side. Similarly, it is discharged into the target pipeline through the outer shell frame on the other side, which is convenient for the filter element to filter the flue gas.

[0009] Preferably, the outer shell frame further includes a docking nozzle, and the docking nozzle is fixedly connected to the outside of the gas guide hood. The docking nozzle facilitates the docking of the gas guide hood with an external pipeline.

[0010] Preferably, the outer shell frame further includes a first partition plate, and the first partition plate is fixedly connected inside the gas guide hood. The first partition plate facilitates the isolation between the outer shell frame and the filter element.

[0011] Preferably, the first valve housing includes a first shell body. One end of the first shell body is fixedly connected to the gas guide hood and the first partition plate. The internal space of the first shell body is communicated with the internal space of the gas guide hood, and an air vent is formed at the lower end of the first shell body. The air vent of the first valve housing on one side is used for exhausting gas, and the air vent of the first valve housing on the other side is used for admitting gas, which is convenient for the first valve plate to close or open the air vent to change the gas flow channel.

[0012] Preferably, the second valve housing includes a second shell body and a second partition plate. The second valve plate is rotatably installed in the second shell body. The second shell body is fixedly connected to the first shell body. The internal spaces of the second shell body and the first shell body are communicated, and a valve port is formed at the lower part of the second shell body. When the second valve plate is pressed, the second valve plate is pressed against the second partition plate, and the space above the second shell body is blocked by the second valve plate, so that the gas is discharged into the filter element through the valve port. When the filter element closes the valve port, the channel above the second shell body is connected, which is convenient for changing the flue gas flow channel.

[0013] Preferably, the filter element includes a housing, filter filling material, and a flange. The filter filling material is filled in the housing. The flange is fixedly connected to the outside of the housing. The housing is inserted into the restraint hood. The housing is in movable contact with the first push plate. A plug strip is fixedly connected to the lower end of the housing, and the plug strip is inserted into the guiding groove. After inserting the housing into the restraint hood, then pass screws through the flange and threadedly install them on the gas guide hood and the restraint hood. Conversely, the filter element can be removed, which is convenient for installing or removing the filter element.

[0014] Preferably, the filter element further includes a support bar, and the support bar is fixedly connected to the lower end of the plug strip. Use a forklift to lift the flange and the support bar. Through the support bar acting on the plug strip and the plug strip acting on the housing, lift the housing to the opening position of the restraint hood, and then drive the forklift forward to push the filter element into the outer shell frame. Conversely, the filter element can be removed, which is convenient for disassembling and assembling the filter element by forklift.

[0015] Preferably, the second valve plate includes a second plate body, a second push plate, and a second rotating shaft. The second rotating shaft is fixedly connected to the upper end of the second plate body. The second push plate is fixedly connected to the upper part of the second plate body. The second rotating shaft is rotatably installed in the second housing. The second plate body is in closing fit with the second partition plate, and the second plate body is in covering fit with the valve port. After the filter element is removed, the second plate body droops due to gravity, and at the same time, the internal air pressure of the second housing is utilized to close the second plate body with the valve port. After the filter element is pushed in, the filter element acts on the second push plate, and through the second push plate acting on the second plate body, the second plate body shields the upper channel of the second housing, facilitating the automatic change of the flue.

[0016] In summary, the technical effects and advantages of the present invention are as follows:

[0017] 1. When replacing the filter element, remove one of the filter elements, so that the first valve plate closes the opening of the first valve housing by gravity. At the same time, the internal air pressure of the first valve housing and the second valve housing is utilized to further tightly press and close the first valve plate and the second valve plate. The second valve plate droops and resets by gravity, closing the opening of the second valve housing, and enabling the gas to continue to be filtered through the other filter element, facilitating the direct replacement of the filter element during the working process.

[0018] 2. The air guide cover is used to guide the flue gas into the first valve housing, discharge it into the filter element through the first valve housing, discharge it into the second valve housing through the filter element, and discharge it into the filter element on the other side from the other side of the second valve housing. Similarly, it is discharged into the target pipeline from the outer shell frame on the other side, avoiding direct discharge of the flue gas and facilitating the filtering of the flue gas by the filter element.

[0019] 3. The vent of the first valve housing on one side is used for exhaust, and the vent of the first valve housing on the other side is used for intake, facilitating the first valve plate to close or open the vent to change the air flow channel.

[0020] 4. After the filter element is pulled out, the weight of the first plate body is utilized to make the first plate body droop, so that the first push plate extends downward, and the first plate body shields the vent. After the filter element is inserted into the outer shell frame, the filter element is used to push the first push plate upward, making the first plate body turn upward, connecting the filter element and the vent, facilitating automatic opening and closing.

[0021] 5. When the second valve plate is pressed, the second valve plate is pressed on the second partition plate, and the upper space of the second housing is partitioned by the second valve plate, enabling the gas to be discharged into the filter element from the valve port. When the filter element closes the valve port, the upper channel of the second housing is connected, facilitating the change of the flue gas flow channel.

[0022] 6. After the outer shell is inserted into the restraint cover, then the screw is passed through the flange and threadedly installed on the air guide cover and the restraint cover. Conversely, the filter element is removed, facilitating the installation or removal of the filter element.

[0023] 7. Use a forklift to lift the flange and support bar, act on the insert bar through the support bar, act on the housing through the insert bar, lift the housing to the opening position of the restraint cover, and then drive the forklift forward to push the filter element into the housing rack. Conversely, remove the filter element, which facilitates the disassembly and assembly of the filter element by the forklift.

[0024] 8. When the filter element is removed, utilize the gravity droop of the second plate body and at the same time utilize the internal air pressure of the second housing to close the second plate body and the valve port; after pushing the filter element in, make the filter element act on the second push plate, and through the second push plate act on the second plate body, so that the second plate body shields the upper channel of the second housing, which facilitates automatically changing the flue. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the overall split structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the housing rack structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the first valve housing structure of the present invention;

[0028] Figure 4 It is a schematic diagram of the first valve plate structure of the present invention;

[0029] Figure 5 It is a schematic diagram of the half structure of the second valve housing of the present invention;

[0030] Figure 6 It is a schematic diagram of the filter element structure of the present invention;

[0031] Figure 7 It is a schematic diagram of the second valve plate structure of the present invention.

[0032] In the figure: 2. Housing rack; 3. First valve housing; 4. First valve plate; 5. Second valve housing; 6. Filter element; 7. Second valve plate; 21. Air guide cover; 22. First partition; 23. Restraint cover; 24. Guide groove; 25. Docking nozzle; 31. First housing; 32. Ventilation port; 41. First rotating shaft; 42. First plate body; 43. First push plate; 51. Second housing; 52. Second partition; 53. Valve port; 61. Housing; 62. Filter filling; 63. Flange; 64. Insert bar; 65. Support bar; 71. Second plate body; 72. Second rotating shaft; 73. Second push plate. Detailed Embodiments

[0033] Next, the technical solutions in the embodiments of the invention will be clearly and completely described in conjunction with the drawings in the embodiments of the invention. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all of the embodiments.

[0034] Refer to Figure 1 ,3 and 4, a low-emission flue gas purification device for a thermal power plant, comprising a housing frame 2. Inside the housing frame 2, a first valve housing 3 and a second valve housing 5 are fixedly connected. Inside the first valve housing 3, a first valve plate 4 is swingably installed. Inside the second valve housing 5, a second valve plate 7 is rotatably installed. A filter element 6 is inserted into the housing frame 2, and the lower part of the filter element 6 is snap-fitted with the lower part of the housing frame 2; The first valve plate 4 includes a first rotating shaft 41, a first plate body 42, and a first push plate 43. The first rotating shaft 41 is fixedly connected to the outside of the first plate body 42, the first push plate 43 is fixedly connected to the lower end of the first plate body 42, the first rotating shaft 41 is rotatably installed in the first housing 31, and the first push plate 43 is in movable contact with the filter element 6. When the filter element 6 is pulled out, due to the weight of the first plate body 42, the first plate body 42 droops, causing the first push plate 43 to extend downward, and using the first plate body 42 to shield the ventilation port 32; After the filter element 6 is inserted into the housing frame 2, the filter element 6 is used to push the first push plate 43 upward, causing the first plate body 42 to flip upward, and connecting the filter element 6 and the ventilation port 32.

[0035] Refer to Figure 1 and 2 , the housing frame 2 includes a gas guide cover 21. Outside the gas guide cover 21, a restraint cover 23 is fixedly connected. A guiding groove 24 is opened at the lower part of the restraint cover 23. The gas guide cover 21 is externally connected to a flue gas pipeline. The gas guide cover 21 is used to guide the flue gas into the first valve housing 3, discharge it through the first valve housing 3 into the filter element 6, discharge it through the filter element 6 into the second valve housing 5, and discharge it from the other side of the second valve housing 5 into the filter element 6 on the other side, and similarly discharge it from the housing frame 2 on the other side into the target pipeline.

[0036] Refer to Figure 1 and 2 , the housing frame 2 further includes a docking nozzle 25, and the docking nozzle 25 is fixedly connected to the outside of the gas guide cover 21. The docking nozzle 25 is used to connect to the upper pipeline.

[0037] Refer to Figure 1 and 2 , the housing frame 2 further includes a first partition 22, and the first partition 22 is fixedly connected inside the gas guide cover 21. The first partition 22 is used to isolate the housing frame 2 and the filter element 6.

[0038] Refer to Figure 1 , 2 and 3, the first valve housing 3 includes a first housing 31. One end of the first housing 31 is fixedly connected to the gas guide cover 21 and the first partition 22. The internal space of the first housing 31 is communicated with the internal space of the gas guide cover 21. A ventilation port 32 is opened at the lower end of the first housing 31. The ventilation port 32 of one side of the first valve housing 3 is used for exhaust, and the ventilation port 32 of the other side of the first valve housing 3 is used for intake.

[0039] Refer to Figure 1 ,3 As shown in FIGS. 1, 3, 4, and 5, the second valve housing 5 includes a second housing 51 and a second partition plate 52. The second valve plate 7 is rotatably installed in the second housing 51. The second housing 51 is fixedly connected to the first housing 31. The internal spaces of the second housing 51 and the first housing 31 are interconnected. A valve port 53 is formed at the lower part of the second housing 51. When the second valve plate 7 is pressed, the second valve plate 7 is pressed against the second partition plate 52, and the space above the second housing 51 is blocked by the second valve plate 7, so that the gas is discharged into the filter element 6 through the valve port 53. When the filter element 6 closes the valve port 53, the passage above the second housing 51 is connected.

[0040] Referring to Figure 1 、 2 、4, and 6, the filter element 6 includes a housing 61, a filter filling 62, and a flange 63. The filter filling 62 is filled in the housing 61. The flange 63 is fixedly connected to the outside of the housing 61. The housing 61 is inserted into the restraint cover 23. The housing 61 is in movable contact with the first push plate 43. A plug 64 is fixedly connected to the lower end of the housing 61. The plug 64 is inserted into the guide groove 24. After inserting the housing 61 into the restraint cover 23, screws are passed through the flange 63 and threadedly installed on the air guide cover 21 and the restraint cover 23. Conversely, the filter element 6 can be removed. After the filter element 6 is pulled out, the first plate body 71 droops to shield the ventilation port 32, the first push plate 43 extends downward, and the second plate body 71 droops to close the valve port 53; after the filter element 6 is pushed in, the second plate body 71 shields the passage above the second housing 71.

[0041] Referring to Figure 1 、 2 and 6, the filter element 6 further includes a support bar 65. The support bar 65 is fixedly connected to the lower end of the plug 64. The flange 63 and the support bar 65 are lifted by a forklift. Through the support bar 65 acting on the plug 64 and the plug 64 acting on the housing 61, the housing 61 is lifted to the opening position of the restraint cover 23. Then the forklift is started to move forward, and the filter element 6 is pushed into the housing frame 2. Conversely, the filter element 6 can be removed.

[0042] Referring to Figure 1 、 5 and 7, the second valve plate 7 includes a second plate body 71, a second push plate 73, and a second rotating shaft 72. The second rotating shaft 72 is fixedly connected to the upper end of the second plate body 71. The second push plate 73 is fixedly connected to the upper part of the second plate body 71. The second rotating shaft 72 is rotatably installed in the second housing 51. The second plate body 71 is in closing fit with the second partition plate 52. The second plate body 71 is in covering fit with the valve port 53. After the filter element 6 is pulled out, due to the gravity of the second plate body 71 drooping and the internal air pressure of the second housing 51, the second plate body 71 is closed with the valve port 53; after the filter element 6 is pushed in, the filter element 6 acts on the second push plate 73, and through the second push plate 73 acting on the second plate body 71, the second plate body 71 shields the passage above the second housing 51.

[0043] Working principle: When replacing the filter element 6, remove one of the filter elements 6, so that the first valve plate 4 closes the opening of the first valve housing 3 downward by gravity. At the same time, use the internal air pressure of the first valve housing 3 and the second valve housing 5 to further press and close the first valve plate 4 and the second valve plate 7. Use gravity to make the second valve plate 7 droop and reset, so that the second valve plate 7 closes the opening of the second valve housing 5, and the gas continues to be filtered through the other filter element 6, realizing the direct replacement of the filter element 6 during the working process.

[0044] As mentioned above, it is only a preferred specific embodiment of the invention, but the protection scope of the invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the invention, according to the technical solution of the invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the invention.

[0045] In the description, the application direction of the prior art that is known to those skilled in the art and has not been changed is simply mentioned for the invention, and combined with the invention to form a complete technology; the use of avoiding the over-popularization of the technology well-known to those skilled in the art is used to assist those skilled in the art to quickly understand the main content of the invention.

Claims

1. A low-emission flue gas purification equipment for a thermal power plant, characterized by: The invention comprises an outer housing frame (2), wherein a first valve housing (3) and a second valve housing (5) are fixedly connected inside the outer housing frame (2), a first valve plate (4) is swingably mounted inside the first valve housing (3), and a second valve plate (7) is rotatably mounted inside the second valve housing (5), a filter core (6) is inserted inside the outer housing frame (2), and the lower part of the filter core (6) is snap-fitted with the lower part of the outer housing frame (2); the first valve plate (4) comprises a first rotating shaft (41), a first plate body (42) and a first push plate (43), and the first valve plate (44) comprises a first rotating shaft (41), a first plate body (42) and a first push plate (43); A rotating shaft (41) is fixedly connected to the outside of the first plate body (42); the first push plate (43) is fixedly connected to the lower end of the first plate body (42); the first push plate (43) is in active contact with the filter element (6); the outer shell frame (2) comprises an air guide cover (21); the outer shell frame (2) further comprises a first partition plate (22); the first partition plate (22) is fixedly connected to the inside of the air guide cover (21); the first valve housing (3) comprises a first shell body (31); one end of the first shell body (31) is connected to the air guide cover (21) and the first shell body (31); The first housing (31) is fixedly connected to a partition (22), the interior space of the first housing (31) is communicated with the interior space of the air guide cover (21), and a vent (32) is provided at the lower end of the first housing (31); the second valve housing (5) comprises a second housing (51) and a second partition (52), the second valve plate (7) is rotatably mounted in the second housing (51), the second housing (51) is fixedly connected to the first housing (31), the interior space of the second housing (51) is communicated with the interior space of the first housing (31), and the second housing (51) is connected to the interior space of the first housing (31). 51) is provided with a valve port (53) at the lower part; the second valve plate (7) comprises a second plate body (71), a second push plate (73) and a second rotating shaft (72); the second rotating shaft (72) is fixedly connected to the upper end of the second plate body (71); the second push plate (73) is fixedly connected to the upper part of the second plate body (71); the second rotating shaft (72) is rotatably mounted in the second housing (51); the second plate body (71) is closed and matched with the second partition plate (52); the second plate body (71) is covered and matched with the valve port (53); After the filter element (6) is pulled out, the first plate body (42) droops to shield the vent (32), the first push plate (43) extends downward, and the second plate body (71) droops to close the valve port (53); after the filter element (6) is pushed in, the second plate body (71) shields the upper channel of the second shell (51).

2. A low-emission flue gas purification device for a thermal power plant according to claim 1, characterized in that: The outside of the air guide cover (21) is fixedly connected to a restraining cover (23), and a guide groove (24) is provided at the bottom of the restraining cover (23).

3. A low-emission flue gas purification device for a thermal power plant according to claim 2, characterized in that: The outer shell frame (2) further comprises a docking nozzle (25), wherein the docking nozzle (25) is fixedly connected to the outside of the air guide cover (21).

4. A low-emission flue gas purification device for a thermal power plant according to claim 3, characterized in that: The filter element (6) comprises a shell (61), a filter filler (62) and a flange (63); the filter filler (62) is filled in the shell (61); the flange (63) is fixedly connected to the outside of the shell (61); the shell (61) is inserted into the restraining cover (23); the shell (61) is in movable contact with the first push plate (43); the lower end of the shell (61) is fixedly connected with an insertion strip (64); the insertion strip (64) is inserted into the guide groove (24).

5. A low-emission flue gas purification device for a thermal power plant according to claim 4, characterized in that: The filter core (6) further comprises a support bar (65), wherein the support bar (65) is fixedly connected to the lower end of the insert bar (64).

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