Power plant flue gas desulfurization and denitrification integrated dust removal device

Abstract

The utility model discloses a power plant flue gas desulfurization and denitrification integrated dust removal device, which relates to the technical field of flue gas treatment and comprises an outer shell, a circulating treatment mechanism is mounted at the top of the outer shell, a fixing plate is fixedly connected to the front side of the outer shell, and a first partition plate and a second partition plate are fixedly connected to the inside of the outer shell. Spraying liquid is introduced into the U-shaped spraying pipe in the fixing frame through the connecting pipe for further desulfurization and dust removal, then the spraying liquid is fed into the outer shell, the humidity of flue gas is reduced through the moisture absorption plate, subsequent cloth bag pasting is avoided, residual large-particle dust is intercepted through the filter screen, and the dust removal efficiency is improved. Then the flue gas flows through an activated carbon filter frame with filter holes in the two sides, residual SO2, NOx and fine particles are adsorbed, the pretreated flue gas enters a cloth bag dust removal assembly to be finally filtered, the cloth bag dust removal load is greatly reduced through multi-layer pretreatment, and the service life of a cloth bag is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, and in particular to an integrated dust removal device for flue gas desulfurization and denitrification in power plants. Background Technology

[0002] Flue gas is a mixture of gases and dust, and is a major cause of atmospheric pollution in residential areas. The composition of flue gas is very complex, including water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons, and nitrogen oxides. In the process of flue gas treatment, desulfurization and denitrification are required, as well as dust removal to ensure that the emitted flue gas meets the standards. Power plant desulfurization and denitrification are chemical engineering technologies used in the thermal power generation industry to reduce the emission of sulfur oxides and nitrogen oxides, and are mainly applied to the treatment of flue gas from coal-fired boilers.

[0003] In existing technologies, after flue gas desulfurization and denitrification, power plant flue gas still needs to use bag filters for dust removal. However, the flue gas has high humidity after desulfurization and denitrification, and the filter bags are prone to condensation, which causes dust and water vapor to combine to form a sticky mud film, resulting in blockage of the filter bag pores. In addition, the flue gas contains large dust particles, hard particles, residual acidic gases and volatile organic compounds that are not completely removed, which puts the filter bags in a high-load and highly corrosive operating environment for a long time, affecting the dust removal efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the existing technology that the flue gas after desulfurization and denitrification has high humidity, and there are also large dust particles, hard particles, residual acidic gases and volatile organic compounds that are not completely removed, causing the filter bags to be in a high-load and highly corrosive operating environment for a long time. Therefore, an integrated dust removal device for power plant flue gas desulfurization and denitrification is proposed.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an integrated dust removal device for flue gas desulfurization and denitrification in power plants, comprising an outer shell, a circulation processing mechanism installed on the top of the outer shell, a fixed plate fixedly connected to the front side of the outer shell, a first partition and a second partition fixedly connected inside the outer shell, with openings on one side of the first partition and one side of the second partition, the two openings being staggered vertically, a gas passage provided between the first partition and the second partition, and a bag filter mechanism installed in the cavity separated from the outer shell by one side of the second partition. A pre-dust removal mechanism is installed in the cavity separated from the first partition on one side. The pre-dust removal mechanism includes an air baffle and a guide rail. Activated carbon filter frames are fixedly connected to both sides of the air baffle. Filter holes are opened on the side walls of the activated carbon filter frames. A feed cover is installed on one side of the activated carbon filter frame. A locking plate abuts against one side of the feed cover. The locking plate is fixedly connected to one side of the activated carbon filter frame by bolts. Two sets of guide rails are provided. The guide rails are fixedly connected to the inside of the outer shell. A moisture-absorbing plate is movably connected to one side of one set of guide rails, and a filter screen is movably connected to one side of the other set of guide rails.

[0006] Preferably, a fixing frame is fixedly connected to the outer side of the outer shell, and a U-shaped spray pipe is fixedly connected to the inner side of the fixing frame. One end of the two U-shaped spray pipes is fixedly connected, and the other end of the two U-shaped spray pipes is fixedly connected to a connecting pipe. One end of the connecting pipe passes through one side of the fixing frame.

[0007] Preferably, a baffle is fixedly connected to the outer side of the outer shell, an air inlet is provided on one side of the outer shell and is located below the baffle, and a collection box is fixedly connected to one side of the fixed frame and is fixedly connected to the bottom side of the outer shell.

[0008] Preferably, the circulation processing mechanism includes a fan and an arc-shaped plate. One end of the fan is fixedly connected to a third air pipe, and one end of the third air pipe is fixedly connected to the top side of the outer casing. The arc-shaped plate is fixedly connected between the outer casing and the second partition, and a monitoring instrument is fixedly connected to the bottom side of the arc-shaped plate.

[0009] Preferably, a three-way solenoid valve is fixedly connected to the other end of the fan, a second air pipe is fixedly connected to one end of the three-way solenoid valve, an air inlet pipe is fixedly connected to the other end of the second air pipe, and one end of the air inlet pipe is fixedly connected to one side of the fixed frame.

[0010] Preferably, the other end of the circulation processing mechanism is fixedly connected to the first air tube.

[0011] Preferably, the bag filter mechanism includes a pulse dust collector assembly, and a bag filter assembly is disposed below the pulse dust collector assembly. The bag filter assembly is fixedly connected to the cavity separated by the outer shell and the second partition. A guide frame is disposed below the bag filter assembly and is fixedly connected to the bottom side of the outer shell.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the U-shaped spray pipe inside the fixed frame is connected to a connecting pipe to introduce spray liquid for further desulfurization and dust removal. The liquid is then sent into the outer casing, where it first passes through a moisture-absorbing plate to reduce the humidity of the flue gas, preventing subsequent bag clogging. Then, it passes through a filter screen to intercept residual large dust particles, and subsequently flows through activated carbon filter frames with filter holes on both sides to adsorb residual SO2 and NO. x The pre-treated flue gas, containing fine particles, enters the bag filter assembly for final filtration. Through multi-layer pretreatment, the dust load on the bag filter is significantly reduced and the life of the filter bags is extended.

[0014] 2. In this utility model, the fan provides power for the flow of flue gas, the third air pipe draws the flue gas from the outer shell, and the arc plate guides the flow to ensure the monitoring instrument monitors it. If the flue gas does not meet the standard, the three-way solenoid valve switches the passage so that the flue gas flows back to the pre-dust removal mechanism for circulation treatment through the second air pipe and the air inlet pipe. If it meets the standard, it is discharged through the first air pipe to realize the circulation treatment of flue gas and ensure that the emission meets the standard. Attached Figure Description

[0015] Figure 1 This utility model presents a first three-dimensional structural schematic diagram of an integrated dust removal device for flue gas desulfurization and denitrification in power plants.

[0016] Figure 2 This utility model provides a second three-dimensional structural schematic diagram of an integrated dust removal device for flue gas desulfurization and denitrification in power plants.

[0017] Figure 3 This utility model provides a schematic diagram of the first connection structure of the internal cross section of an integrated dust removal device for flue gas desulfurization and denitrification in power plants.

[0018] Figure 4 This utility model provides a schematic diagram of the second connection structure of the internal cross section of an integrated dust removal device for flue gas desulfurization and denitrification in power plants.

[0019] Legend: 1. Outer shell; 2. Bag filter mechanism; 21. Pulse dust collector assembly; 22. Bag filter assembly; 3. Fixing plate; 4. Pre-dust removal mechanism; 41. Activated carbon filter frame; 42. Feed cover plate; 43. Locking plate; 44. Air baffle plate; 45. Filter screen; 46. Moisture absorption plate; 47. Guide rail; 48. Baffle; 49. Connecting pipe; 410. U-shaped spray pipe; 411. Collection box; 5. Circulation treatment mechanism; 51. Fan; 52. First air pipe; 53. Three-way solenoid valve; 54. Second air pipe; 55. Third air pipe; 56. Inlet pipe; 57. Monitor; 58. Arc plate; 6. Guide frame; 7. Fixing frame; 8. First partition plate; 9. Second partition plate. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides an integrated dust removal device for flue gas desulfurization and denitrification in power plants, including an outer shell 1. A circulation processing mechanism 5 is installed on the top of the outer shell 1. A fixing plate 3 is fixedly connected to the front side of the outer shell 1. A first partition 8 and a second partition 9 are fixedly connected inside the outer shell 1. Openings are provided on one side of the first partition 8 and one side of the second partition 9, and the two openings are staggered vertically. A gas passage is provided between the first partition 8 and the second partition 9. A bag filter mechanism 2 is installed in the cavity separated from the outer shell 1 by one side of the second partition 9. A pre-dust removal mechanism 4 is installed in the cavity separated from the outer shell 1 by one side of the first partition 8. The pre-dust removal mechanism 4 includes an air baffle 44 and a guide rail 47. Activated carbon filter frames 41 are fixedly connected to both sides of the air baffle 44. Filter holes are provided on the side walls of the activated carbon filter frames 41. A feed cover 42 is installed on one side of the activated carbon filter frames 41. A locking plate 43 is abutted against one side of the activated carbon filter frame 41 by bolts. Two sets of guide slides 47 are provided. The guide slides 47 are fixedly connected to the inner side of the outer shell 1. A moisture-absorbing plate 46 is movably connected to one side of one set of guide slides 47, and a filter screen 45 is movably connected to one side of the other set of guide slides 47. A fixing frame 7 is fixedly connected to the outer side of the outer shell 1. A U-shaped spray pipe 410 is fixedly connected to the inner side of the fixing frame 7. One end of the two U-shaped spray pipes 410 is fixedly connected, and the other end of the two U-shaped spray pipes 410 is fixedly connected to a connecting pipe 49. One end of the connecting pipe 49 passes through one side of the fixing frame 7. A baffle 48 is fixedly connected to the outer side of the outer shell 1. An air inlet is opened on one side of the outer shell 1 and is located below the baffle 48. A collection box 411 is fixedly connected to one side of the fixing frame 7 and is fixedly connected to the bottom side of the outer shell 1.

[0023] The outlet of the desulfurization tower is connected to one end of the inlet pipe 56 to send the desulfurized and denitrified flue gas into the fixed frame 7. The connecting pipe 49 is connected to a high-pressure liquid delivery system. The U-shaped spray pipe 410 is connected to the spray liquid through the connecting pipe 49 to spray the flue gas for pretreatment to further desulfurize and remove dust. The treated waste liquid or impurities are guided by the baffle 48 to the collection box 411 for centralized collection. The flue gas enters the cavity separated from the first partition 8 from the air inlet of the outer shell 1. First, it passes through the moisture absorption plate 46 to absorb the moisture in the flue gas to prevent the filter bags from clogging due to high humidity. Then, it passes through the filter screen 45 to filter the large particles of dust remaining inside. Then, it enters the activated carbon filter frame 41. With the help of its side wall filter holes and internal activated carbon, it adsorbs the harmful gases and fine particles remaining in the flue gas. The baffle plate 44 guides the flow of flue gas to ensure sufficient filtration.

[0024] The pre-dust-removed flue gas enters the bag filter assembly 22 through the gas channel formed by the staggered openings between the first partition 8 and the second partition 9. The filter bags perform final filtration of fine particles. The pulse dust removal assembly 21 periodically generates pulse airflow to clean the filter bags. The cleaned dust falls into the guide frame 6 and is discharged, ensuring continuous and efficient dust removal by the filter bags. Through multi-layer filtration and spray pretreatment, the dust removal load of the filter bags is greatly reduced and the service life of the filter bags is extended.

[0025] The activated carbon filter frame 41 can be opened by using the feed cover plate 42 and locking plate 43 to replace the activated carbon. The guide slide 47 facilitates the pull-out assembly and disassembly of the moisture absorption plate 46 and the filter screen 45, making it convenient for regular replacement.

[0026] Example 2: Figure 1 and Figure 2 As shown, the circulation processing mechanism 5 includes a fan 51 and an arc-shaped plate 58. One end of the fan 51 is fixedly connected to a third air pipe 55, and one end of the third air pipe 55 is fixedly connected to the top side of the outer casing 1. The arc-shaped plate 58 is fixedly connected between the outer casing 1 and the second partition 9, and a monitoring instrument 57 is fixedly connected to the bottom side of the arc-shaped plate 58. The other end of the fan 51 is fixedly connected to a three-way solenoid valve 53, one end of the three-way solenoid valve 53 is fixedly connected to a second air pipe 54, and the other end of the second air pipe 54 is fixedly connected to... An air inlet pipe 56 is fixedly connected to one side of a fixed frame 7; the other end of the circulation processing mechanism 5 is fixedly connected to a first air pipe 52; the bag dust collector 2 includes a pulse dust collector assembly 21, and a bag dust collector assembly 22 is provided below the pulse dust collector assembly 21. The bag dust collector assembly 22 is fixedly connected to the cavity separated by the outer shell 1 and the second partition 9. A guide frame 6 is provided below the bag dust collector assembly 22 and is fixedly connected to the bottom side of the outer shell 1.

[0027] After the fan 51 starts, the flue gas inside the outer casing 1 is drawn through the third air pipe 55. The passage is controlled by the three-way solenoid valve 53, and the flue gas is guided by the arc plate 58. The monitor 57 monitors the flue gas indicators in real time and feeds them back to the three-way solenoid valve 53 to achieve intelligent control. If the flue gas does not meet the standards, it is sent back to the system for circulation treatment through the second air pipe 54 and the air inlet pipe 56. If it meets the standards, it is centrally discharged through the first air pipe 52 to achieve flue gas circulation treatment, ensure that the emission meets the standards, and improve the accuracy and efficiency of treatment.

[0028] The operation and working principle of this device are as follows: The outlet of the desulfurization tower is connected to one end of the inlet pipe 56, and the flue gas after desulfurization and denitrification is sent into the fixed frame 7. The U-shaped spray pipe 410 is used to spray the flue gas with spray liquid for further desulfurization and dust removal. Then the flue gas enters the pre-dust removal mechanism 4 from the air inlet of the outer shell 1. The moisture in the flue gas is absorbed by the moisture absorption plate 46 to prevent the filter bag from clogging. The filter screen 45 filters the residual large dust particles and flows through the activated carbon filter frame 41 with filter holes on both sides. The activated carbon adsorbs the residual harmful gases and fine particles. The treated waste liquid is guided by the baffle 48 to the collection box 411 for centralized recycling. The flue gas is pre-dust removed by the bag filter assembly 22 for final filtration. The pulse dust collector assembly 21 periodically generates pulse airflow to clean the filter bags. The cleaned dust is discharged through the guide frame 6. The fan 51 operates and draws the flue gas from the outer casing 1 through the third air pipe 55. The arc plate 58 guides the flow to ensure that the monitoring instrument 57 monitors the flue gas indicators in real time. If the indicators are not met, the three-way solenoid valve 53 switches the passage, and the flue gas flows back to the pre-dust removal mechanism 4 for recycling through the second air pipe 54 and the inlet pipe 56. After meeting the standards, the flue gas is discharged through the first air pipe 52.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An integrated dust removal device for flue gas desulfurization and denitrification in power plants, comprising an outer casing (1), characterized in that: A circulation processing mechanism (5) is installed on the top of the outer shell (1). A fixing plate (3) is fixedly connected to the front side of the outer shell (1). A first partition (8) and a second partition (9) are fixedly connected inside the outer shell (1). Openings are provided on one side of the first partition (8) and one side of the second partition (9). The two openings are staggered vertically. A gas passage is provided between the first partition (8) and the second partition (9). A bag filter mechanism (2) is installed in the cavity separated from the outer shell (1) by the second partition (9). A pre-dust removal mechanism (4) is installed in the cavity separated from the outer shell (1) by the first partition (8). The pre-dust removal mechanism (4) includes a baffle. The plate (44) and the guide frame (47) are fixedly connected to both sides of the baffle plate (44). The side walls of the activated carbon filter frame (41) are provided with filter holes. A feed cover plate (42) is installed on one side of the activated carbon filter frame (41). A locking plate (43) is abutted on one side of the feed cover plate (42). The locking plate (43) is fixedly connected to one side of the activated carbon filter frame (41) by bolts. Two sets of guide frames (47) are provided. The guide frames (47) are fixedly connected to the inside of the outer shell (1). A moisture-absorbing plate (46) is movably connected to one side of one set of guide frames (47), and a filter screen (45) is movably connected to one side of the other set of guide frames (47).

2. The integrated dust removal device for flue gas desulfurization and denitrification in power plants according to claim 1, characterized in that: A fixed frame (7) is fixedly connected to the outer side of the outer shell (1), and a U-shaped spray pipe (410) is fixedly connected to the inner side of the fixed frame (7). One end of the two U-shaped spray pipes (410) is fixedly connected, and the other end of the two U-shaped spray pipes (410) is fixedly connected to a connecting pipe (49). One end of the connecting pipe (49) passes through one side of the fixed frame (7).

3. The integrated dust removal device for flue gas desulfurization and denitrification in power plants according to claim 1, characterized in that: A baffle (48) is fixedly connected to the outer side of the outer shell (1). An air inlet is provided on one side of the outer shell (1) and is located below the baffle (48). A collection box (411) is fixedly connected to one side of the fixed frame (7) and is fixedly connected to the bottom side of the outer shell (1).

4. The integrated dust removal device for flue gas desulfurization and denitrification in power plants according to claim 1, characterized in that: The circulating processing mechanism (5) includes a fan (51) and an arc plate (58). One end of the fan (51) is fixedly connected to a third air pipe (55). One end of the third air pipe (55) is fixedly connected to the top side of the outer shell (1). The arc plate (58) is fixedly connected between the outer shell (1) and the second partition (9). A monitoring instrument (57) is fixedly connected to the bottom side of the arc plate (58).

5. The integrated dust removal device for flue gas desulfurization and denitrification in power plants according to claim 4, characterized in that: The other end of the fan (51) is fixedly connected to a three-way solenoid valve (53), one end of the three-way solenoid valve (53) is fixedly connected to a second air pipe (54), the other end of the second air pipe (54) is fixedly connected to an air inlet pipe (56), and one end of the air inlet pipe (56) is fixedly connected to one side of the fixed frame (7).

6. The integrated dust removal device for flue gas desulfurization and denitrification in power plants according to claim 5, characterized in that: The other end of the circulation processing mechanism (5) is fixedly connected to the first air pipe (52).

7. The integrated dust removal device for flue gas desulfurization and denitrification in power plants according to claim 1, characterized in that: The bag dust removal mechanism (2) includes a pulse dust removal component (21), and a bag dust removal component (22) is provided below the pulse dust removal component (21). The bag dust removal component (22) is fixedly connected to the cavity separated by the outer shell (1) and the second partition (9). A guide frame (6) is provided below the bag dust removal component (22), and the guide frame (6) is fixedly connected to the bottom side of the outer shell (1).

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