A flue gas purification device for a roaster

Abstract

The utility model discloses a kind of flue gas purification devices for roasting furnace, it is related to roasting furnace flue gas treatment technical field, including combustion box, combustion structure, spray tank and filter box, the left end of combustion box is fixed with air inlet pipe, the inside bottom end of combustion box is installed with combustion structure, the combustion box is connected with spray tank by first connecting pipe, the rear of spray tank is installed with spray structure, the bottom end of spray tank is connected with collection tank by conveying pipe, and filter frame is installed in the inside of collection tank, the lower left end of collection tank is installed with drain pipe, the upper right end of collection tank is connected with second connecting pipe by bending pipe, the right end of second connecting pipe is connected with filter box, the inside of filter box is installed with first filter plate.The flue gas purification device for roasting furnace makes that flue gas and alkaline solution are fully contacted, improves the effect of neutralization reaction, and first filter plate and second filter plate are conveniently disassembled and assembled.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology for roasting furnaces, specifically a flue gas purification device for roasting furnaces. Background Technology

[0002] The main pollutants in the flue gas from the roasting furnace are tar fumes, dust, SO2, CO, CO2 or H2, etc. In the treatment process, a combustion structure is set up to fully combust the flue gas, then an alkaline solution is used to neutralize the acidic substances in the flue gas, and then it is filtered through a filtration structure.

[0003] Chinese utility model patent CN210035555U discloses a flue gas purification device for a roasting furnace, including a combustion chamber, a condensation chamber, and a filter chamber. The combustion chamber has an inlet pipe on its left side and a fuel tank at its lower end, connected to a gas collection box via a conduit. The gas collection box has a fuel branch pipe at its upper end, extending into the combustion chamber, with a flame nozzle at its upper end. An ignition switch is located on the front side of the gas collection box. The combustion chamber is connected to a condensation chamber via a connecting pipe on its right side. The lower end of the condensation chamber is connected to a liquid collection tank via a conduit. A reflux pump is located in front of the liquid collection tank, connected to the right side of a water tank via a conduit on its left side. The solution in the water tank is an alkaline solution. This device can more thoroughly treat the flue gas discharged from the roasting furnace, improving purification efficiency and preventing flue gas residue from clogging the pipe openings, thus improving ease of use.

[0004] Based on existing solutions and actual production and processing applications, the existing flue gas purification devices for roasting furnaces cannot improve the degree of neutralization reaction of flue gas and are inconvenient to disassemble and clean the filter structure. Therefore, we propose a flue gas purification device for roasting furnaces to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a flue gas purification device for roasting furnaces, so as to solve the problems mentioned in the background art that the existing flue gas purification devices for roasting furnaces cannot improve the degree of neutralization reaction of flue gas and are inconvenient to disassemble and clean the filter structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flue gas purification device for a roasting furnace, comprising a combustion chamber, a combustion structure, a spray chamber, and a filter chamber.

[0007] An air intake pipe is fixed to the left end of the combustion chamber, and a combustion structure is installed at the bottom of the interior of the combustion chamber;

[0008] The combustion chamber is connected to the spray chamber via a first connecting pipe, and the spray chamber is equipped with partitions at equal intervals inside. A spray structure is installed at the rear of the spray chamber. The bottom of the spray chamber is connected to the collection chamber via a conveying pipe, and a filter frame is installed inside the collection chamber. A drain pipe is installed at the lower left end of the collection chamber, and a second connecting pipe is connected to the upper right end of the collection chamber via a bent pipe.

[0009] The right end of the second connecting pipe is connected to a filter box. The filter box contains a first filter plate, and a second filter plate is provided on the right side of the first filter plate. An external connecting pipe is installed at the upper right end of the filter box, and a box cover is fixed to the right end of the filter box by screws. The box cover is equipped with a cleaning structure for the first and second filter plates.

[0010] Preferably, the spray structure includes a water box, an infusion pipe, and nozzles. The water box is fixed at the rear end of the spray box, and the infusion pipe is connected to the rear end of the water box. Nozzles are fixed at equal intervals at the front end of the water box.

[0011] Preferably, the left end of the filter frame is connected to the collection box via a sealing ring.

[0012] Preferably, both the first connecting pipe and the second connecting pipe are equipped with gas control valves.

[0013] Preferably, the first and second filter plates are connected to the filter box by threaded connections.

[0014] Preferably, the cleaning structure includes a motor, a first transmission rod, a second transmission rod, a third transmission rod, and a brush plate. The motor is fixed to the left side of the box cover, and the first transmission rod is fixed to the output end of the motor. The left end of the first transmission rod is connected to the second transmission rod, and the left end of the second transmission rod is connected to the third transmission rod. The outer sides of the second and third transmission rods are both fixed with brush plates.

[0015] Preferably, the first transmission rod and the second transmission rod, as well as the second transmission rod and the third transmission rod, are connected by a snap-fit ​​connection, and the left end of the third transmission rod is rotatably installed inside the filter box.

[0016] Preferably, the first transmission rod passes through the circular hole in the middle of the second filter plate, and the second transmission rod passes through the circular hole in the middle of the first filter plate.

[0017] Preferably, brush plates are attached to the left side surfaces of both the first filter plate and the second filter plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the flue gas purification device of the roasting furnace allows the flue gas to fully contact the alkaline solution, improves the neutralization reaction effect, and facilitates the disassembly and assembly of the first filter plate and the second filter plate.

[0019] 1. The partition with air holes at the bottom and the partition with air holes at the top are staggered, thus forming a meandering gas channel inside the spray box. Combined with two sets of nozzles at equal intervals at the top and bottom, the flue gas can fully contact the alkaline solution, improving the neutralization reaction effect.

[0020] 2. The cover is equipped with a cleaning structure for the first and second filter plates. The cleaning structure includes a motor, a first transmission rod, a second transmission rod, a third transmission rod, and a brush plate. The motor drives the brush plate to rotate through the first, second, and third transmission rods. The cleaning structure facilitates cleaning of the filter surfaces of the first and second filter plates.

[0021] 3. The right end of the filter box is fixed with a box cover by screws. The connection between the first transmission rod and the second transmission rod, as well as the connection between the second transmission rod and the third transmission rod, are all snap-fit ​​connections. The connection between the first filter plate and the second filter plate and the filter box is all threaded connection, which facilitates the disassembly and assembly of the first filter plate and the second filter plate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first axial section structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the second axial side section structure of this utility model;

[0024] Figure 3 This is a cross-sectional structural diagram of the spray box of this utility model;

[0025] Figure 4 This is a schematic diagram of the connection structure between the filter frame and the collection box of this utility model;

[0026] Figure 5 This is a schematic diagram of the connection structure between the second transmission rod and the first filter plate of this utility model;

[0027] Figure 6 This is a schematic diagram of the disassembled cleaning structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the axial structure of this utility model.

[0029] In the diagram: 1. Combustion box; 2. Air inlet pipe; 3. Combustion structure; 4. First connecting pipe; 5. Spray box; 6. Baffle plate; 7. Infusion pipe; 8. Water box; 9. Nozzle; 10. Delivery pipe; 11. Collection box; 12. Filter frame; 13. Drain pipe; 14. Bent pipe; 15. Second connecting pipe; 16. Filter box; 17. First filter plate; 18. Second filter plate; 19. External pipe; 20. Box cover; 21. Motor; 22. First transmission rod; 23. Second transmission rod; 24. Third transmission rod; 25. Brush plate. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-7 Existing flue gas purification devices for roasting furnaces cannot improve the degree of neutralization reaction of flue gas and are inconvenient to disassemble and clean the filter structure. In order to solve this technical problem, this embodiment discloses the following technical content.

[0032] A flue gas purification device for a roasting furnace includes a combustion chamber 1, an air inlet pipe 2, a combustion structure 3, a first connecting pipe 4, a spray box 5, a partition 6, a liquid delivery pipe 7, a water box 8, a nozzle 9, a conveying pipe 10, a collection box 11, a filter frame 12, a drain pipe 13, a bent pipe 14, a second connecting pipe 15, a filter box 16, a first filter plate 17, a second filter plate 18, an external pipe 19, a box cover 20, a motor 21, a first transmission rod 22, a second transmission rod 23, a third transmission rod 24, and a brush plate 25.

[0033] An air inlet pipe 2 is fixed to the left end of the combustion box 1. The air inlet pipe 2 is connected to the flue gas outlet of the roasting furnace. The flue gas flowing out of the roasting furnace enters the interior of the combustion box 1 through the air inlet pipe 2. A combustion structure 3 is installed at the bottom of the interior of the combustion box 1. The flue gas is completely burned through the combustion structure 3. The working principle and internal structure of the combustion structure 3 are the same as those of the combustion structure consisting of a fuel tank, fuel branch pipe, flame nozzle and ignition switch in a roasting furnace flue gas purification device disclosed in Chinese Utility Model Patent No. CN210035555U.

[0034] Combustion box 1 is connected to spray box 5 through first connecting pipe 4. After the flue gas is completely combusted, the gas control valve inside the first connecting pipe 4 is opened, and the gas flows from the first connecting pipe 4 to spray box 5. A spray structure is installed at the rear of spray box 5. The spray structure includes water box 8, infusion pipe 7 and nozzle 9. Water box 8 is fixed at the rear end of spray box 5, and infusion pipe 7 is connected to the rear end of water box 8. Nozzles 9 are fixed at equal intervals at the front end of water box 8.

[0035] An external alkaline solution delivery device is connected to the infusion pipe 7. The alkaline solution is delivered to the water box 8 and the nozzle 9 through the infusion pipe 7, and sprayed onto the gas from the nozzle 9 to neutralize acidic substances in the gas. The spray box 5 has partitions 6 fixed at equal intervals inside, and the partitions 6 have air holes inside. Figures 1-3As shown, the air holes of one set of partitions 6 are located at the bottom, and the air holes of another set of partitions 6 are located at the top. The partitions 6 with different air hole positions are staggered, so that the partitions 6 form a meandering gas flow channel inside the spray box 5, allowing the gas to fully contact the neutralizing liquid. A gas control valve is installed at the right end of the second connecting pipe 15. The gas control valve is located on the right side of the bend pipe 14. After the gas stays inside the spray box 5 for a period of time and is neutralized to the maximum extent, the gas flows to the filter box 16 through the second connecting pipe 15.

[0036] The bottom of the spray box 5 is connected to the collection box 11 through the conveying pipe 10, and the collection box 11 is equipped with a filter frame 12. The neutralized liquid flows from the conveying pipe 10 to the collection box 11, and after being filtered by the filter frame 12, it flows to the bottom of the collection box 11. The lower left end of the collection box 11 is equipped with a drain pipe 13. The wastewater can be discharged by opening the water valve inside the drain pipe 13. The equally spaced spray nozzles 9 and the baffles 6 improve the flue gas treatment effect.

[0037] The right end of the second connecting pipe 15 is connected to a filter box 16. The filter box 16 is equipped with a first filter plate 17, and a second filter plate 18 is provided on the right side of the first filter plate 17. An external pipe 19 is installed at the upper right end of the filter box 16. After the flue gas is filtered by the first filter plate 17 and the second filter plate 18, it exits through the external pipe 19.

[0038] A cover 20 is fixed to the right end of the filter box 16 by screws. The cover 20 is equipped with a cleaning structure for the first filter plate 17 and the second filter plate 18. The cleaning structure includes a motor 21, a first transmission rod 22, a second transmission rod 23, a third transmission rod 24, and a brush plate 25. The motor 21 is fixed to the left side of the cover 20, and the output end of the motor 21 is fixed to the first transmission rod 22. The left end of the first transmission rod 22 is connected to the second transmission rod 23, and the left end of the second transmission rod 23 is connected to the third transmission rod 24. Brush plates 25 are fixed on the outer sides of the second transmission rod 23 and the third transmission rod 24. The connection between the first transmission rod 22 and the second transmission rod 23, as well as the connection between the second transmission rod 23 and the third transmission rod 24, is a snap-fit ​​connection. The left end of the third transmission rod 24 is rotatably installed in the filter box 16. The first transmission rod 22 passes through the round hole in the middle of the second filter plate 18, and the second transmission rod 23 passes through the round hole in the middle of the first filter plate 17. Brush plates 25 are attached to the left side of both the first filter plate 17 and the second filter plate 18.

[0039] The motor 21 drives the brush plate 25 to rotate through the first transmission rod 22, the second transmission rod 23 and the third transmission rod 24, and the rotation of the brush plate 25 cleans the filter surfaces of the first filter plate 17 and the second filter plate 18.

[0040] The first filter plate 17 and the second filter plate 18 are both connected to the filter box 16 by threaded connections. When it is necessary to remove the first filter plate 17 and the second filter plate 18, remove the screws used to connect the filter box 16 and the box cover 20, then remove the box cover 20, the motor 21 and the first transmission rod 22. Next, hold the right end of the second filter plate 18, rotate the second filter plate 18, and take out the second filter plate 18 from the inside of the filter box 16. Then pull out the second transmission rod 23 to the right, then rotate the first filter plate 17 and take out the first filter plate 17. The first filter plate 17 and the second filter plate 18 can then be removed and replaced.

[0041] When it is necessary to remove impurities from the filter frame 12, pull the filter frame 12 to the left so that the filter frame 12 is separated from the collection box 11. The left end of the filter frame 12 is connected to the collection box 11 through a sealing ring. When the filter frame 12 is connected to the collection box 11, ensure airtightness and avoid air leakage.

[0042] The above completes a series of operations for the flue gas purification device for the roasting furnace. Any content not described in detail in this specification is prior art known to those skilled in the art.

[0043] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flue gas purification device for a roasting furnace, comprising a combustion chamber (1), a combustion structure (3), a spray chamber (5), and a filter chamber (16), characterized in that: An air inlet pipe (2) is fixed to the left end of the combustion chamber (1), and a combustion structure (3) is installed at the bottom of the interior of the combustion chamber (1). The combustion chamber (1) is connected to the spray chamber (5) through the first connecting pipe (4), and the spray chamber (5) is fixed with partitions (6) at equal intervals inside. A spray structure is installed at the rear of the spray chamber (5). The bottom end of the spray chamber (5) is connected to the collection box (11) through the conveying pipe (10), and a filter frame (12) is installed inside the collection box (11). A drain pipe (13) is installed at the lower left end of the collection box (11), and a second connecting pipe (15) is connected to the upper right end of the collection box (11) through the bent pipe (14). The right end of the second connecting pipe (15) is connected to a filter box (16). The filter box (16) is equipped with a first filter plate (17) and a second filter plate (18) is provided on the right side of the first filter plate (17). An external pipe (19) is installed at the upper right end of the filter box (16), and a box cover (20) is fixed to the right end of the filter box (16) by screws. The box cover (20) is equipped with a cleaning structure for the first filter plate (17) and the second filter plate (18).

2. The flue gas purification device for a roasting furnace according to claim 1, characterized in that: The spray structure includes a water box (8), an infusion pipe (7) and a nozzle (9). The water box (8) is fixed at the rear end of the spray box (5), and the infusion pipe (7) is connected to the rear end of the water box (8). The nozzle (9) is fixed at equal intervals at the front end of the water box (8).

3. The flue gas purification device for a roasting furnace according to claim 1, characterized in that: The left end of the filter frame (12) is connected to the collection box (11) by a sealing ring.

4. The flue gas purification device for a roasting furnace according to claim 1, characterized in that: Gas control valves are installed inside both the first connecting pipe (4) and the second connecting pipe (15).

5. The flue gas purification device for a roasting furnace according to claim 1, characterized in that: The first filter plate (17) and the second filter plate (18) are both connected to the filter box (16) by threaded connection.

6. The flue gas purification device for a roasting furnace according to claim 1, characterized in that: The cleaning structure includes a motor (21), a first transmission rod (22), a second transmission rod (23), a third transmission rod (24), and a brush plate (25). The motor (21) is fixed on the left side of the box cover (20), and the first transmission rod (22) is fixed at the output end of the motor (21). The left end of the first transmission rod (22) is connected to the second transmission rod (23), and the left end of the second transmission rod (23) is connected to the third transmission rod (24). The brush plate (25) is fixed on the outer side of both the second transmission rod (23) and the third transmission rod (24).

7. The flue gas purification device for a roasting furnace according to claim 6, characterized in that: The first transmission rod (22) and the second transmission rod (23) and the second transmission rod (23) and the third transmission rod (24) are connected by a snap-fit ​​connection. The left end of the third transmission rod (24) is rotatably installed in the filter box (16).

8. The flue gas purification device for a roasting furnace according to claim 6, characterized in that: The first transmission rod (22) passes through the round hole in the middle of the second filter plate (18), and the second transmission rod (23) passes through the round hole in the middle of the first filter plate (17).

9. The flue gas purification device for a roasting furnace according to claim 6, characterized in that: Brush plates (25) are attached to the left side of both the first filter plate (17) and the second filter plate (18).

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