Flue gas treatment equipment with low-temperature SCR denitration function

Abstract

The flue gas treatment equipment with the low-temperature SCR denitration function comprises a flue gas treatment machine box, a gas inlet pipe is fixedly connected to the left side of the flue gas treatment machine box, a scrap collecting frame is placed at the bottom, close to the left side of the flue gas treatment machine box, of the flue gas treatment machine box, and a water inlet pipe is fixedly installed on the front side of the flue gas treatment machine box; a sealing partition plate is fixedly connected to the inner wall of the flue gas treatment machine box, a water filtering screen plate is fixedly connected to the left side of the sealing partition plate, an exhaust pipe is fixedly connected to the right side of the sealing partition plate, and an SCR denitration catalyst is fixedly installed in the middle, close to the inner wall of the flue gas treatment machine box, of the flue gas treatment machine box. According to the flue gas treatment device disclosed by the utility model, through the matching of the structures, particle impurities in flue gas are removed by adsorbing water through the arrangement of the flue gas treatment case, and then the flue gas is desulfurized, purified and filtered through the SCR denitration catalyst and the multi-layer filter frame, so that the effects of carrying out triple filtration on the flue gas, adsorbing SCR denitration and filtering in sequence are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a flue gas treatment device with a low-temperature SCR desulfurization function. Background Art

[0002] Low-temperature SCR denitrification technology is also a type of flue gas denitrification technology. This type of denitrification process needs to follow the reaction principle of SCR to enable the catalyst in the chemical reaction to adapt to the low-temperature environment. Low-temperature SCR denitrification technology has the advantage of selective reduction of nitrogen oxides in the flue gas of thermal power plants. It can be arranged in the tail flue of the boiler without making changes to the boiler body. The absorption tower of low-temperature denitrification is small in size, easy to install, and occupies a small area.

[0003] For example, a flue gas desulfurization and denitrification treatment device for a thermal power plant with patent publication number CN202221406897.4, the utility model comprises: a treatment box, an air inlet pipe is installed on one side of the treatment box, and an air outlet pipe is installed on the other side thereof, and electric control valves are installed on the air inlet pipe and the air outlet pipe, respectively, a control switch is installed at the front end of the treatment box, and the two electric control valves are electrically connected to the control switch, respectively, a filter plate is installed between the top inner wall and the bottom inner wall of the treatment box, a lifting and rotating mechanism is slidably connected in the treatment box, and a cleaning mechanism, a connection positioning mechanism, and a threaded drive mechanism are respectively installed in the treatment box;

[0004] Since the above-mentioned desulfurization and denitrification treatment equipment performs flue gas filtration treatment through filter plates and other structures, the simple filter plate structure is not effective enough in desulfurizing the flue gas, resulting in poor desulfurization capacity in the retained flue gas, and it is easy to discharge sulfur-containing gases into the air again, which brings certain adverse effects to actual use and therefore needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a flue gas treatment equipment with a low-temperature SCR desulfurization function, which has the advantages of triple filtration of flue gas, successively adsorbing SCR desulfurization and filtering effect, bringing certain favorable effects to actual use and solving the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas treatment device with a low-temperature SCR de-catalysis function, comprising a flue gas treatment chassis, an air intake pipe is fixedly connected to the left side of the flue gas treatment chassis, a chip collection frame is placed on the bottom of the flue gas treatment chassis near its left side, a water inlet pipe is fixedly installed on the front side of the flue gas treatment chassis, a sealing baffle is fixedly connected to the inner wall of the flue gas treatment chassis, a water filter screen is fixedly connected to the left side of the sealing baffle, an exhaust pipe is fixedly connected to the right side of the sealing baffle, an SCR de-catalyst is fixedly installed on the middle of the flue gas treatment chassis near its inner wall, a multi-layer filter frame is fixedly connected to the right side of the flue gas treatment chassis near its inner wall, and an outlet pipe is fixedly connected to the right side of the flue gas treatment chassis.

[0007] Preferably, a guide plate is fixedly connected to the bottom of the chip collecting frame, a guide groove is provided on the inner wall of the flue gas treatment machine box, and the inner wall of the guide groove and the surface of the guide plate are slidably connected.

[0008] Preferably, an inner groove is provided on the left side of the inner wall of the flue gas treatment machine case, and a water level sensor is fixedly installed on the inner wall of the inner groove.

[0009] Preferably, an ultraviolet sterilization lamp is fixedly installed on the top of the flue gas treatment chassis near the left side of the inner wall thereof, and the ultraviolet sterilization lamp is located directly above the water filter screen.

[0010] Preferably, the main body of the chip collecting frame is a receiving and sealing frame, the inner wall of the receiving and sealing frame is fixedly connected with a partition filter plate, and the front side of the receiving and sealing frame is fixedly connected with a drain pipe with an electric control valve.

[0011] Preferably, a vertical plate is fixedly connected to the middle of the SCR desulfurization catalyst near its inner wall, and arc-shaped guide plates are fixedly connected to the bottom and top of the vertical plate near its inner wall. An upward ammonia spraying pipe is fixedly installed inside the vertical plate, and a grid plate is fixedly connected to the side of the vertical plate. A plurality of SCR catalysts are fixedly installed on the rear side of the inner wall of the SCR desulfurization catalyst.

[0012] Preferably, the main body of the multi-layer filter frame is a hollow frame with a pull-out door, and the pull-out door on the hollow frame is fixedly connected with an activated carbon filter mesh plate, a filter cotton plate, and a deodorizing mesh plate, and the activated carbon filter mesh plate, the filter cotton plate, and the deodorizing mesh plate are successively lowered from left to right, and the rear sides of the activated carbon filter mesh plate, the filter cotton plate, and the deodorizing mesh plate are all clamped with the front side of the inner wall of the hollow frame.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, the flue gas can be sucked in through the air inlet pipe arranged at the left side of the flue gas treatment box. Because the flue gas contains a lot of large particles of impurities and dust, water can be supplemented by first extending into the top of the chip collection frame, that is, the left side of the sealing partition in the flue gas treatment box, and liquid water is pumped in through the water inlet pipe and the internal liquid water is discharged through the drain pipe. Adsorbent is added to the liquid water inside the flue gas treatment box to adsorb and precipitate impurities in the flue gas in the chip collection frame, and impurity precipitation is intercepted at the partition filter plate. When the impurities are discharged later, the chip collection frame and the liquid water on the inner wall of the flue gas treatment box can be discharged by the drain pipe, and then the chip collection frame can be pulled out and cleaned by the guide plate and the guide groove. Because a water level sensor is arranged under the water filter screen plate, the water level can be supplemented. The flue gas adsorbed and precipitated in the liquid water will rise up through the water filter screen plate, and the water filter screen plate intercepts and filters the water in the flue gas to make it stand and drip, thereby completing the filtration, adsorption and precipitation of large particles of impurities in the flue gas.

[0015] 2. In the utility model, after the preliminary treatment, the flue gas will enter the interior of the SCR desulfurization catalyst through the exhaust pipe, and under the guidance of the arc-shaped guide plate, it can successively pass through the upper ammonia spray pipe and the grid plate and multiple SCR catalysts to perform reaction treatment and desulfurization work. The flue gas treated by the SCR catalytic desulfurization will enter the multi-layer filter frame for post-filtration and purification, that is, the activated carbon filter screen plate, the filter cotton plate, and the deodorizing screen plate slowly filter the impurities in the flue gas to intercept, thereby achieving the flue gas SCR catalytic desulfurization and filtering treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the multi-layer filter frame in the utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the SCR deoxidation catalyst in the utility model;

[0020] Figure 5 It is an enlarged view of point A of the utility model;

[0021] Figure 6 It is an enlarged view of point B of the present utility model.

[0022] In the figure: 1. Flue gas treatment chassis; 2. Inlet pipe; 3. Chip collection frame; 4. Water inlet pipe; 5. Sealing baffle; 6. Water filter screen; 7. Exhaust pipe; 8. SCR deoxidation catalyst; 9. Multi-layer filter frame; 10. Exhaust pipe; 11. Guide plate; 12. Guide groove; 13. Water level sensor; 14. Ultraviolet sterilization lamp; 15. Partition filter screen; 16. Drain pipe; 17. Vertical plate; 18. Arc guide plate; 19. Ammonia spray pipe; 20. Grille plate; 21. SCR catalyst; 22. Activated carbon filter screen; 23. Filter cotton plate; 24. Deodorizing screen. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1, please refer to Figures 1 to 6 The utility model provides a technical solution: a flue gas treatment device with a low-temperature SCR destocking function, comprising a flue gas treatment chassis 1, an air intake pipe 2 is fixedly connected to the left side of the flue gas treatment chassis 1, a chip collecting frame 3 is placed on the bottom of the flue gas treatment chassis 1 near its left side, a water inlet pipe 4 is fixedly installed on the front side of the flue gas treatment chassis 1, a sealing baffle 5 is fixedly connected to the inner wall of the flue gas treatment chassis 1, a water filter screen 6 is fixedly connected to the left side of the sealing baffle 5, an exhaust pipe 7 is fixedly connected to the right side of the sealing baffle 5, an SCR destocking catalyst 8 is fixedly installed on the middle part of the flue gas treatment chassis 1 near its inner wall, a multi-layer filter frame 9 is fixedly connected to the right side of the flue gas treatment chassis 1 near its inner wall, and an outlet pipe 10 is fixedly connected to the right side of the flue gas treatment chassis 1.

[0025] Furthermore, a guide plate 11 is fixedly connected to the bottom of the chip collecting frame 3 , and a guide groove 12 is provided on the inner wall of the flue gas treatment chassis 1 , and the inner wall of the guide groove 12 is slidably connected to the surface of the guide plate 11 .

[0026] Furthermore, an inner groove is opened on the left side of the inner wall of the flue gas treatment chassis 1, and a water level sensor 13 is fixedly installed on the inner wall of the inner groove. Since the water level sensor 13 is arranged below the water filter screen 6, the constraint sensing of the replenishment water level can be performed, thereby determining the amount of liquid water stored inside the flue gas treatment chassis 1.

[0027] Furthermore, an ultraviolet sterilization lamp 14 is fixedly installed on the top of the flue gas treatment box 1 near the left side of its inner wall, and the ultraviolet sterilization lamp 14 is located directly above the water filter screen 6. The operation of the ultraviolet sterilization lamp 14 can sterilize the rising flue gas with ultraviolet rays.

[0028] Furthermore, the main body of the chip collecting frame 3 is a receiving and sealing frame, the inner wall of which is fixedly connected with a partition filter plate 15, and the front side of the receiving and sealing frame is fixedly connected with a drain pipe 16 with an electric control valve, so that impurity sediments are intercepted at the partition filter plate 15, and when the impurities are discharged later, the drain pipe 16 can be used to first discharge the chip collecting frame 3 and the liquid water on the inner wall of the flue gas treatment chassis 1.

[0029] Example 2, please refer to Figures 1 to 6 The difference between this embodiment and embodiment 1 is that: a vertical plate 17 is fixedly connected to the middle of the inner wall of the SCR deoxidation catalyst 8, and an arc-shaped guide plate 18 is fixedly connected to the bottom and top of the vertical plate 17 near the inner wall. An upward ammonia injection pipe 19 is fixedly installed inside the vertical plate 17, and a grid plate 20 is fixedly connected to the side of the vertical plate 17. A plurality of SCR catalysts 21 are fixedly installed on the rear side of the inner wall of the SCR deoxidation catalyst 8. The main body of the multi-layer filter frame 9 is a hollow frame with a pull-out door, and the pull-out door on the hollow frame is fixedly connected with an activated carbon filter screen plate 22, a filter cotton plate 23, and a deodorizing screen plate 24, and the activated carbon filter screen plate 22, the filter cotton plate 23, and the deodorizing screen plate 24 are successively lowered from left to right, and the rear sides of the activated carbon filter screen plate 22, the filter cotton plate 23, and the deodorizing screen plate 24 are all clamped with the front side of the inner wall of the hollow frame. Under the guidance of the arc-shaped guide plate 18, they can successively pass through the upper ammonia spray pipe 19 and the grid plate 20 and multiple SCR catalysts 21 for reaction treatment and deodorization work. The flue gas after the SCR catalytic deodorization treatment will enter the multi-layer filter frame 9 for post-filtration and purification work, that is, the activated carbon filter screen plate 22, the filter cotton plate 23, and the deodorizing screen plate 24 slowly filter the impurities in the flue gas.

[0030] Working principle: When the flue gas treatment equipment with low-temperature SCR destocking function is in use, the air intake pipe 2 on the left side of the flue gas treatment chassis 1 can inhale the flue gas. Because the flue gas contains a lot of large particles of impurities and dust, you can first use the top of the chip frame 3, that is, the left side of the sealing partition 5 in the flue gas treatment chassis 1 to replenish water, and inject liquid water through the water inlet pipe 4 and discharge the internal liquid water through the drain pipe 16. Add adsorbent (such as alum, etc.) to the liquid water inside the flue gas treatment chassis 1 to adsorb impurities in the flue gas and precipitate them in the chip frame 3, and intercept the impurity precipitates at the partition filter plate 15. When discharging impurities later, you can first use the drain pipe 16 to discharge the chip frame 3 and the liquid water on the inner wall of the flue gas treatment chassis 1, and then use the guide plate 11 and the guide groove 12 to pull the chip frame 3 out. During cleaning, a water level sensor 13 is provided below the water filter mesh plate 6 to sense the water level. The flue gas adsorbed and precipitated in the liquid water will rise through the water filter mesh plate 6 to filter the water in the flue gas and make it stand and drip. The flue gas after preliminary treatment will enter the interior of the SCR denitrification catalyst 8 through the exhaust pipe 7. Under the guidance of the arc-shaped guide plate 18, it can successively pass through the upper ammonia spray pipe 19, the grid plate 20 and multiple SCR catalysts 21 for reaction treatment and denitrification. The flue gas treated by the SCR catalytic denitrification will enter the multi-layer filter frame 9 for post-filtration and purification, that is, the activated carbon filter mesh plate 22, the filter cotton plate 23 and the deodorizing mesh plate 24 slowly filter the impurities in the flue gas, thereby realizing the triple filtration of the flue gas, successively adsorbing the SCR denitrification and filtering effect.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas treatment device with a low-temperature SCR destocking function, comprising a flue gas treatment chassis (1), characterized in that: An air intake pipe (2) is fixedly connected to the left side of the flue gas treatment box (1); a chip collecting frame (3) is placed on the bottom of the flue gas treatment box (1) near its left side; a water inlet pipe (4) is fixedly installed on the front side of the flue gas treatment box (1); a sealing baffle (5) is fixedly connected to the inner wall of the flue gas treatment box (1); a water filter screen (6) is fixedly connected to the left side of the sealing baffle (5); an exhaust pipe (7) is fixedly connected to the right side of the sealing baffle (5); an SCR deoxidation catalyst (8) is fixedly installed on the middle part of the flue gas treatment box (1) near its inner wall; a multi-layer filter frame (9) is fixedly connected to the right side of the flue gas treatment box (1) near its inner wall; and an air outlet pipe (10) is fixedly connected to the right side of the flue gas treatment box (1).

2. The flue gas treatment equipment with low-temperature SCR destocking function according to claim 1 is characterized in that: The bottom of the chip collecting frame (3) is fixedly connected to a guide plate (11), the inner wall of the flue gas treatment machine box (1) is provided with a guide groove (12), and the inner wall of the guide groove (12) is slidably connected to the surface of the guide plate (11).

3. The flue gas treatment equipment with low-temperature SCR destocking function according to claim 1 is characterized in that: An inner groove is provided on the left side of the inner wall of the flue gas treatment machine case (1), and a water level sensor (13) is fixedly mounted on the inner wall of the inner groove.

4. The flue gas treatment equipment with low-temperature SCR destocking function according to claim 1 is characterized in that: An ultraviolet sterilization lamp (14) is fixedly mounted on the top of the flue gas treatment cabinet (1) near the left side of the inner wall thereof, and the ultraviolet sterilization lamp (14) is located directly above the water filter screen plate (6).

5. The flue gas treatment equipment with low-temperature SCR destocking function according to claim 1 is characterized in that: The main body of the chip collecting frame (3) is a receiving and sealing frame, the inner wall of which is fixedly connected with a partition filter plate (15), and the front side of the receiving and sealing frame is fixedly connected with a drainage pipe (16) with an electric control valve.

6. The flue gas treatment equipment with low-temperature SCR destocking function according to claim 1 is characterized in that: A vertical plate (17) is fixedly connected to the middle of the inner wall of the SCR deoxidation catalyst (8), and arc-shaped guide plates (18) are fixedly connected to the bottom and top of the vertical plate (17) near the inner wall. An upward ammonia spraying pipe (19) is fixedly installed inside the vertical plate (17), and a grid plate (20) is fixedly connected to the side of the vertical plate (17). A plurality of SCR catalysts (21) are fixedly installed on the rear side of the inner wall of the SCR deoxidation catalyst (8).

7. The flue gas treatment equipment with low-temperature SCR destocking function according to claim 1 is characterized in that: The main body of the multi-layer filter frame (9) is a hollow frame with a drawer door, and the drawer door on the hollow frame is fixedly connected with an activated carbon filter screen plate (22), a filter cotton plate (23), and a deodorizing screen plate (24), and the activated carbon filter screen plate (22), the filter cotton plate (23), and the deodorizing screen plate (24) are successively lowered from left to right, and the rear sides of the activated carbon filter screen plate (22), the filter cotton plate (23), and the deodorizing screen plate (24) are all clamped with the front side of the inner wall of the hollow frame.

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