Electric calcining furnace flue gas purification system
By combining dust immersion treatment, tubular and sponge mesh tar treatment devices with exhaust gas purification devices, the problem of difficult removal of dust and tar in electric calcining furnace flue gas was solved, achieving a highly efficient flue gas purification effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGXIA JINGSHUNJINGONG MASCH MFG CO LTD
- Filing Date
- 2022-11-03
- Publication Date
- 2026-07-21
AI Technical Summary
Dust and tar in the flue gas of existing electric calcining furnaces are difficult to remove effectively, and conventional filtration equipment is prone to clogging, resulting in poor dust removal performance.
The dust and tar in the flue gas are removed by combining a dust immersion water treatment device, a tubular tar treatment device, and a sponge mesh tar treatment device with an exhaust gas purification device, through water washing, filtration, and adsorption.
It effectively removes dust and tar from flue gas, avoids clogging of filtration equipment, and improves purification efficiency.
Smart Images
Figure CN115574619B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of purification technology, and in particular to a flue gas purification system for electric calcining furnaces. Background Technology
[0002] An electric calcining furnace is a relatively simple vertical cylinder with a steel shell and a refractory lining that can withstand temperatures of 2300℃ to 2500℃. Multiple layers of insulation material separate the lining from the outer steel cylinder, minimizing heat loss during heating. Electric calcining furnaces are primarily used for calcining anthracite, and secondarily for calcining petroleum coke and pitch coke. The principle is that an electric current passing through the resistive material being calcined generates heat, thus achieving the calcination process. During calcination, a large amount of flue gas is emitted, containing significant amounts of dust and tar. Conventional filters are prone to clogging, and conventional baghouse dust collectors are also susceptible to tar buildup, leading to blockages and incomplete removal of dust and tar from the flue gas. Summary of the Invention
[0003] Therefore, it is necessary to provide a flue gas purification system for electric calcining furnaces that effectively removes impurities.
[0004] A flue gas purification system for an electric calcining furnace includes a dust immersion treatment device, a tubular tar treatment device, a sponge mesh tar treatment device, a tail gas purification device, a primary flue gas passage, a secondary flue gas passage, a tertiary flue gas passage, and a tail gas passage. The outlet of the dust immersion treatment device is connected to the inlet of the tubular tar treatment device via a primary flue gas duct. The outlet of the tubular tar treatment device is connected to the inlet of the sponge mesh tar treatment device via a secondary flue gas passage. The outlet of the sponge mesh tar treatment device is connected to the inlet of the tail gas purification device via a tertiary flue gas duct. The outlet of the tail gas purification device is connected to the tail gas outlet. The upper end of the exhaust gas channel is connected to the lower end of the exhaust gas channel, which is connected to an external power generation system. The dust immersion water treatment device includes a primary exhaust gas pipeline, a primary water tank, an overflow outlet, a primary asbestos mesh, a primary water tank, a secondary exhaust gas pipeline, a secondary water tank, a secondary water tank, and a primary circulating water pump. The outlet of the primary exhaust gas pipeline is connected to the inlet of the primary water tank. The overflow outlet is located inside the primary water tank and is connected to the primary water tank via a pipeline. The asbestos mesh is located inside the primary water tank. The primary circulating water pump is connected to the secondary water tank and the secondary water tank via a pipeline with one inlet and one outlet. The outlet of the secondary water tank is connected to the secondary exhaust gas pipeline.
[0005] Preferably, the tubular tar treatment device includes a primary housing, partitions, support bases, multiple tubes, support frames, and a tube frame. The multiple tubes are vertically arranged inside the primary housing, allowing airflow to pass through them vertically. Adjacent tubes in the multiple tubes are welded together, and the multiple tubes and the tube frame are welded together. The partitions are staggered at the upper and lower ends of the primary housing, forming a serpentine channel. There are four support frames: two are located on both sides of the upper end of the tube frame, and the other two are located on both sides of the lower end of the tube frame. The support bases are located on both sides of the upper end of the tube frame, and the support frames are erected on the support bases.
[0006] Preferably, the tubular tar treatment device further includes a secondary asbestos mesh, and the partition divides the primary housing into three chambers, with the secondary asbestos mesh located at the upper ends of the first and third chambers.
[0007] Preferably, the tubular tar treatment device further includes a primary cleaning tank, which is located below the primary housing.
[0008] Preferably, the sponge mesh tar treatment device includes a secondary box, several layers of sponge-like wire mesh, and slots. The sponge-like wire mesh is vertically arranged inside the secondary box, so that the airflow passes through the sponge-like wire mesh vertically. The slots are engaged with the upper and lower ends of the sponge-like wire mesh, and the sponge-like wire mesh plates are staggered to form a serpentine channel.
[0009] Preferably, the sponge mesh tar treatment device further includes a three-stage asbestos mesh, which is disposed between the slot and the secondary housing.
[0010] Preferably, the sponge mesh tar treatment device further includes a high-temperature blowing mechanism, which includes a heating wire and a fan. The heating wire is located at the air outlet of the air duct, the fan is located at the rear end of the heating wire, and the outlet of the air duct is connected to the upper end of the secondary housing.
[0011] Preferably, the sponge mesh tar treatment device further includes a secondary cleaning tank, which is located below the secondary housing.
[0012] Preferably, the exhaust gas purification device includes an adsorption tower and a water contact adsorption mechanism. The water contact adsorption mechanism includes an exhaust gas water contact port, a three-stage water tank, and a coal tar discharge port. The upper end of the water contact adsorption mechanism is connected to the lower end of the adsorption tower. One side of the exhaust gas water contact port is fixedly connected to the lower part of the adsorption tower. The exhaust gas water contact port is located at the upper end of the three-stage water tank, which is filled with water. The exhaust gas water contact port is located below the liquid surface. The upper end of the three-stage water tank is connected to the lower part of the adsorption tower. The coal tar discharge port is located inside the three-stage water tank.
[0013] Preferably, the bottom of the exhaust gas channel outlet is connected to the bottom of the adsorption tower body via a pipe.
[0014] Preferably, the adsorption tower body is further provided with a tower body cover, which is located at the top of the adsorption tower body, and the adsorption tower body is further provided with an inspection door, which is located on the side wall of the adsorption tower body.
[0015] Preferably, the adsorption tower body is also equipped with an explosion-proof valve, which is located on the side wall of the adsorption tower body.
[0016] Preferably, the exhaust gas purification device further includes a spray adsorption mechanism, which includes a spray nozzle, a spray pipe, a secondary circulating water pump, and a valve. The spray adsorption mechanism is connected to the middle of the adsorption tower. The spray nozzle is located in the middle of the adsorption tower. The inlet of the spray nozzle is connected to the outlet of the spray pipe. The valve is installed on the spray pipe. The outlet of the secondary circulating water pump is connected to the inlet of the spray pipe. The inlet of the secondary circulating water pump is connected to the tertiary water tank. The secondary circulating water pump is located inside the tertiary water tank.
[0017] Preferably, the exhaust gas purification device further includes a water vapor adsorption mechanism, which includes two or more sponge-like wire mesh plates. The two or more sponge-like wire mesh plates are staggered and spaced on both sides of the inner wall of the adsorption tower to form a serpentine channel.
[0018] Beneficial effects: The flue gas purification system of the electric calcining furnace of the present invention introduces the flue gas discharged during the calcination process into the primary water tank through a dust immersion water treatment device. After the flue gas enters the primary water tank and is washed with water, the water flows from the overflow port into the primary water tank through a pipe. At the same time, the ash carried in the flue gas also falls into the primary water tank. The ash that falls into the primary water tank is filtered by the primary asbestos mesh. Because the ash has a different specific gravity, the lighter ash falls to the bottom of the primary asbestos mesh, while the heavier ash floats on the upper layer of the primary asbestos mesh. The ash floating on the upper layer of the primary asbestos mesh overflows the overflow port and flows into the primary water tank for collection. Through the filtration of the primary asbestos mesh, the dust in the flue gas can be removed cleanly without causing the primary asbestos mesh to become clogged. After being washed by a dust immersion treatment device, the flue gas enters a tubular tar treatment device for purification through a pipeline. Tar and dust in the flue gas enter the tubular tubes. Because the tubes are cold, the tar with a low freezing point adheres to the tube walls, liquefying and flowing to the bottom of the chamber. After purification by the tubular tar treatment device, the flue gas enters a sponge mesh tar treatment device through a flue gas pipeline. The sponge mesh tar treatment device uses a sponge mesh; tar and dust in the flue gas enter the sponge mesh, which adsorbs the tar and dust in an S-shaped path within the channel. After adsorption treatment by the sponge mesh tar treatment device, the flue gas enters a tail gas purification device for further adsorption. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the flue gas purification system for an electric calcining furnace.
[0020] Figure 2 This is a schematic diagram of a dust immersion treatment device.
[0021] Figure 3 , 4 This is a schematic diagram of a tubular tar treatment device.
[0022] Figure 5 This is a schematic diagram of a sponge mesh tar treatment device.
[0023] Figure 6 This is a schematic diagram of the exhaust gas purification device.
[0024] In the diagram: 1. Dust immersion treatment device; 101. Primary exhaust gas pipe; 102. Primary water tank; 103. Overflow outlet; 104. Primary asbestos mesh; 105. Primary water tank; 106. Secondary exhaust gas pipe; 107. Secondary water tank; 108. Secondary circulating water pump; 109. Primary flue gas pipe; 2. Tubular tar treatment device; 3. Primary housing; 301. Partition plate; 302. Support base; 303. Multi-tube; 304. Support frame; 305. Tubular frame; 306. Secondary asbestos mesh; 307. Primary cleaning tank; 308. Secondary flue gas pipe; 4. Sponge mesh tar treatment device; 5. Secondary housing; 501. Several layers of sponge-like wire mesh. 502, Card slot; 503, Three-stage asbestos mesh; 504, Two-stage cleaning tank; 505, High-temperature blowing and washing mechanism; 6, Heating wire; 601, Fan; 602, Three-stage flue gas duct; 7, Tail gas purification device; 8, Adsorption tower body; 801, Tower body cover; 802, Inspection door; 803, Explosion-proof valve; 804, Tail gas passage; 9, Water contact adsorption mechanism; 10, Tail gas water contact port; 1001, Three-stage water tank; 1002, Coal tar discharge port; 1003, Spray adsorption mechanism; 11, Spray nozzle; 1101, Spray pipe; 1102, Two-stage circulating water pump; 1103, Valve; 1104, Water vapor adsorption mechanism; 12, Two or more sponge-like wire mesh plates; 1201. Detailed Implementation
[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Please refer to Figure 1A flue gas purification system for an electric calcining furnace includes a dust immersion treatment device 1, a tubular tar treatment device 3, a sponge mesh tar treatment device 5, a tail gas purification device 8, a primary flue gas passage, a secondary flue gas passage, a tertiary flue gas passage, and a tail gas passage 9. The outlet of the dust immersion treatment device 1 is connected to the inlet of the tubular tar treatment device 3 via a primary flue gas pipe 2. The outlet of the tubular tar treatment device 3 is connected to the inlet of the sponge mesh tar treatment device 5 via a secondary flue gas passage. The outlet of the sponge mesh tar treatment device 5 is connected to the inlet of the tail gas purification device 8 via a tertiary flue gas pipe 7. The outlet of the tail gas purification device 8 is connected to the upper end of the tail gas outlet passage, and the lower end of the tail gas passage is connected to an external power generation system. The dust immersion water treatment device 1 includes a primary exhaust gas pipe 101, a primary water tank 102, an overflow port 103, a primary asbestos mesh 104, a primary water tank 105, a secondary exhaust gas pipe 106, a secondary water tank 107, a secondary water tank 108, and a primary circulating water pump 109. The outlet of the primary exhaust gas pipe 101 is connected to the inlet of the primary water tank 102. The overflow port 103 is located inside the primary water tank 102. The overflow port 103 is connected to the primary water tank 105 through a pipe. The asbestos mesh is located inside the primary water tank 105. The primary circulating water pump 109 is connected to the secondary water tank 107 and the secondary water tank 108 through a pipe with one inlet and one outlet. The outlet of the secondary water tank 107 is connected to the secondary exhaust gas pipe.
[0027] The flue gas emitted during combustion first enters the dust immersion water treatment device 1. The dust immersion water treatment device 1 uses a water washing method. The flue gas enters the primary water tank 102 through the primary exhaust gas pipe 101. After being washed by water in the primary water tank 102, the flue gas enters the primary water tank 105 through the pipe from the overflow port 103. At the same time, the ash in the flue gas also enters the primary water tank 105. The primary water tank 105 is equipped with a primary asbestos mesh 104. After the dust enters the primary water tank 105, the heavier ash settles below the primary asbestos mesh 104, while the lighter ash floats above the asbestos mesh. The floating ash that exceeds the overflow port 103 enters the primary water tank 102 for collection. After being washed by the dust immersion water treatment device 1, the flue gas enters the tubular tar treatment device 3 through the secondary exhaust gas pipe 106. The tar and dust in the flue gas enter the tubular honeycomb structure. Since the tube is cold, the exhaust gas cools down on the inner and outer walls after entering the tube. After cooling, the tar, which has a low freezing point, adheres to the tube wall and liquefies, flowing down the tube to the bottom of the housing. After treatment by the tube-type tar treatment device 3, the flue gas enters the sponge mesh-type tar treatment device 5 through the secondary flue gas pipe 4. This device uses a sponge-like mesh for adsorption. The sponge mesh moves up and down, adsorbing tar and dust in the flue gas. The serpentine path of the sponge mesh further blocks and adsorbs low-quality dust particles. After adsorption by the sponge mesh, the flue gas enters the exhaust gas purification device 8, where it undergoes moisture absorption treatment before being discharged.
[0028] In a preferred embodiment, the tubular tar treatment device 3 includes a primary housing 301, a partition 302, a support base 303, multiple tubes 304, a support frame 305, and a tube frame 306. The multiple tubes 304 are vertically arranged inside the primary housing 301, allowing airflow to pass through them vertically. Adjacent tubes in the multiple tubes 304 are welded together, and the multiple tubes 304 and the tube frame 306 are welded together. The partition 302 is staggered at the upper and lower ends of the primary housing 301, forming a serpentine channel. There are four support frames 305, with two support frames 305 located on both sides of the upper end of the tube frame 306 and the other two support frames 305 located on both sides of the lower end of the tube frame 306. The support base 303 is located on both sides of the upper end of the tube frame 306, and the support frames 305 are mounted on the support base 303.
[0029] The tubular tar treatment device 3 forms a serpentine channel with staggered intervals, which lengthens the treatment path, increases the contact time, and improves the adsorption effect.
[0030] In a preferred embodiment, the tubular tar treatment device 3 further includes a secondary asbestos mesh 307. The partition 302 divides the primary housing 301 into three chambers, and the secondary asbestos mesh 307 is located at the upper ends of the first and third chambers. In treating tar, dust, and other impurities, if the exhaust gas contains too much tar, dust, and other impurities, the filtration effect is insufficient. Therefore, the secondary asbestos mesh 307 is used to supplement the filtration of tar, dust, and other impurities in the exhaust gas. After filtering the tar, dust, and other impurities in the exhaust gas for a period of time, the secondary asbestos mesh 307 is removed, cleaned, and then put back to continue filtering the tar, dust, and other impurities in the exhaust gas.
[0031] In a preferred embodiment, the tubular tar treatment device 3 further includes a primary cleaning tank 308, which is located below the primary housing 301.
[0032] The tar and dust in the flue gas of the tubular tar treatment device 3 fall into the primary cleaning tank 308 and are discharged through the pipeline.
[0033] In a preferred embodiment, the sponge mesh tar treatment device 5 includes a secondary housing 501, several layers of sponge-like wire mesh 502, and slots 503. The sponge-like wire mesh is vertically arranged inside the secondary housing 501, so that the airflow passes through the sponge-like wire mesh vertically. The slots 503 are engaged with the upper and lower ends of the sponge-like wire mesh, and the sponge-like wire mesh plates are staggered to form a serpentine channel.
[0034] The card slot 503 and the sponge-like wire mesh plate are connected in an alternating manner to form a serpentine channel, which lengthens the processing path, increases the contact time, and improves the adsorption effect.
[0035] In a preferred embodiment, the sponge mesh tar treatment device 5 further includes a three-stage asbestos mesh 504, which is disposed between the slot 503 and the secondary housing 501.
[0036] In the process of treating impurities such as tar and dust, the exhaust gas often contains too much tar and dust, making filtration ineffective. Therefore, a three-stage asbestos mesh (504) is used to supplement the filtration of these impurities. After filtering the exhaust gas for a period of time, the three-stage asbestos mesh (504) is removed, cleaned, and then put back to continue filtering the tar and dust.
[0037] In a preferred embodiment, the sponge mesh tar treatment device 5 further includes a high-temperature blowing mechanism 6, which includes a heating wire 601 and a fan 602. The heating wire 601 is located at the air outlet of the air duct, and the fan 602 is located at the rear end of the heating wire 601. The outlet of the air duct is connected to the upper end of the secondary housing 501.
[0038] The high-temperature blowing mechanism uses six pairs of sponge-like wire meshes for high-temperature blowing. The high temperature liquefies the solid tar and other impurities condensed on the sponge-like wire meshes. The high-temperature blowing causes the liquefied tar to drip off at a certain speed and fall into the secondary cleaning tank 505.
[0039] In a preferred embodiment, the sponge mesh tar treatment device 5 further includes a secondary cleaning tank 505, which is located below the secondary housing 501.
[0040] The tar and dust in the flue gas from the sponge mesh tar treatment device 5 fall into the primary cleaning tank 308 and are discharged through the pipeline.
[0041] In a preferred embodiment, the exhaust gas purification device 8 includes an adsorption tower body 801 and a water contact adsorption mechanism 10. The water contact adsorption mechanism 10 includes an exhaust gas water contact port 1001, a three-stage water tank 1002, and a coal tar discharge port 1003. The upper end of the water contact adsorption mechanism 10 is connected to the lower end of the adsorption tower body 801. One side of the exhaust gas water contact port 1001 is fixedly connected to the lower part of the adsorption tower body 801. The exhaust gas water contact port 1001 is located at the upper end of the three-stage water tank 1002, which is filled with water. The exhaust gas water contact port 1001 is located below the liquid surface. The upper end of the three-stage water tank 1002 is connected to the lower part of the adsorption tower body 801. The coal tar discharge port 1003 is located inside the three-stage water tank 1002.
[0042] The exhaust gas contact port 1001 is designed with a bend, which first changes the direction of airflow, and secondly increases the volume, space, and pressure.
[0043] Because the pipe at the bend is narrower and the air volume is smaller, the exhaust gas can be buffered and released when it enters the exhaust gas contact inlet 1001. The pressure will decrease momentarily, and after the pressure decreases, the flow rate of some solid particles or heavier impurities in the exhaust gas will decrease. The solid particles or heavier impurities fall to the exhaust gas contact inlet 1001 by their own gravity, and then fall from the exhaust gas contact inlet 1001 into the third-stage water tank 1002.
[0044] The coal tar is gradually discharged from the pipeline using a coal tar discharge pump.
[0045] In a preferred embodiment, the bottom of the outlet of the exhaust gas channel 9 is connected to the bottom of the adsorption tower 801 via a pipe. The moisture in the exhaust gas absorbed by the sponge-like wire mesh plate enters the adsorption tower 801 from the bottom of the outlet of the exhaust gas channel 9 through the pipe.
[0046] In a preferred embodiment, the adsorption tower body 801 is further provided with a tower body cover 802, which is located at the top of the adsorption tower body 801. The adsorption tower body 801 is also provided with an inspection door 803, which is located on the side wall of the adsorption tower body 801.
[0047] The inspection gate 803 is used to cut off the water supply when the water inlet pipe or adsorption tower 801 is under maintenance.
[0048] In a preferred embodiment, the adsorption tower body 801 is further provided with an explosion-proof valve 804, which is located on the side wall of the adsorption tower body 801.
[0049] The explosion-proof valve 804 is used to slow down the flow rate of liquid or gas when it flows through the valve. This reduces friction with the pipe wall, lowers the temperature, prevents the pressure from rising, and avoids the occurrence of pipe rupture.
[0050] In a preferred embodiment, the exhaust gas purification device 8 further includes a spray adsorption mechanism 11, which includes a spray nozzle 1101, a spray pipe 1102, a secondary circulating water pump 1103, and a valve 1104. The spray adsorption mechanism 11 is connected to the middle of the adsorption tower 801. The spray nozzle 1101 is located in the middle of the adsorption tower 801. The inlet of the spray nozzle 1101 is connected to the outlet of the spray pipe 1102. The valve 1104 is installed on the spray pipe 1102. The outlet of the secondary circulating water pump is connected to the inlet of the spray pipe 1102. The inlet of the secondary circulating water pump 1103 is connected to the tertiary water tank 1002. The secondary circulating water pump 1103 is located inside the tertiary water tank 1002.
[0051] The spray nozzles are conical spiral nozzles, which spray in a mist form.
[0052] In a preferred embodiment, the exhaust gas purification device 8 further includes a water vapor adsorption mechanism 12, which comprises two or more sponge-like wire mesh plates 1201. These two or more sponge-like wire mesh plates 1201 are staggered and spaced on both sides of the inner wall of the adsorption tower body 801, forming a serpentine channel. The staggered arrangement of the serpentine channel lengthens the processing path, resulting in a longer contact time and better adsorption effect.
[0053] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.
Claims
1. A flue gas purification system for an electric calcining furnace, characterized in that: The system includes a dust immersion treatment device, a tubular tar treatment device, a sponge mesh tar treatment device, a tail gas purification device, a primary flue gas passage, a secondary flue gas passage, a tertiary flue gas passage, and a tail gas passage. The outlet of the dust immersion treatment device is connected to the inlet of the tubular tar treatment device via a primary flue gas duct. The outlet of the tubular tar treatment device is connected to the inlet of the sponge mesh tar treatment device via a secondary flue gas passage. The outlet of the sponge mesh tar treatment device is connected to the inlet of the tail gas purification device via a tertiary flue gas duct. The outlet of the tail gas purification device is connected to the upper end of the tail gas outlet passage. The lower end of the exhaust gas passage is connected to an external power generation system. The dust immersion water treatment device includes a primary exhaust gas pipe, a primary water tank, an overflow outlet, a primary asbestos mesh, a primary water tank, a secondary exhaust gas pipe, a secondary water tank, a secondary water tank, and a primary circulating water pump. The outlet of the primary exhaust gas pipe is connected to the inlet of the primary water tank. The overflow outlet is located inside the primary water tank and is connected to the primary water tank via a pipe. The asbestos mesh is located inside the primary water tank. The primary circulating water pump is connected to the secondary water tank and the secondary water tank via a pipe with one inlet and one outlet. The outlet of the secondary water tank is connected to the secondary exhaust gas passage.
2. The electric calcining furnace flue gas purification system as described in claim 1, characterized in that: The tubular tar treatment device includes a primary housing, partitions, support bases, multiple tubes, support frames, and a tube frame. The multiple tubes are vertically arranged inside the primary housing, allowing airflow to pass through them vertically. Adjacent tubes are welded together, and the multiple tubes and the tube frame are welded together. Partitions are staggered at the upper and lower ends of the primary housing, forming a serpentine channel. There are four support frames: two are located on both sides of the upper end of the tube frame, and the other two are located on both sides of the lower end of the tube frame. The support bases are located on both sides of the upper end of the tube frame, and the support frames are erected on the support bases.
3. The electric calcining furnace flue gas purification system as described in claim 1, characterized in that: The tubular tar treatment device also includes a secondary asbestos mesh, and a partition divides the primary housing into three chambers. The secondary asbestos mesh is located at the upper end of the first and third chambers. The tubular tar treatment device also includes a primary cleaning tank, which is located below the primary housing.
4. The electric calcining furnace flue gas purification system as described in claim 1, characterized in that: The sponge mesh tar treatment device includes a secondary housing, several layers of sponge-like wire mesh, and slots. The sponge-like wire mesh is vertically arranged inside the secondary housing, allowing airflow to pass through it vertically. The slots engage with the upper and lower ends of the sponge-like wire mesh. The sponge-like wire mesh plates are staggered to form a serpentine channel. The sponge mesh tar treatment device also includes a tertiary asbestos mesh, which is arranged between the slots and the secondary housing.
5. The electric calcining furnace flue gas purification system as described in claim 1, characterized in that: The sponge mesh tar treatment device also includes a high-temperature blowing mechanism, which includes a heating wire and a fan. The heating wire is located at the air outlet of the air duct, and the fan is located at the rear end of the heating wire. The outlet of the air duct is connected to the upper end of the secondary housing.
6. The electric calcining furnace flue gas purification system as described in claim 1, characterized in that: The sponge mesh tar treatment device also includes a secondary cleaning tank, which is located below the secondary housing.
7. The electric calcining furnace flue gas purification system as described in claim 1, characterized in that: The exhaust gas purification device includes an adsorption tower and a water contact adsorption mechanism. The water contact adsorption mechanism includes an exhaust gas water contact port, a three-stage water tank, and a coal tar discharge port. The upper end of the water contact adsorption mechanism is connected to the lower end of the adsorption tower. One side of the exhaust gas water contact port is fixedly connected to the lower part of the adsorption tower. The exhaust gas water contact port is located at the upper end of the three-stage water tank, which is filled with water. The exhaust gas water contact port is located below the liquid surface. The upper end of the three-stage water tank is connected to the lower part of the adsorption tower. The coal tar discharge port is located inside the three-stage water tank.
8. The electric calcining furnace flue gas purification system as described in claim 1, characterized in that: The bottom of the exhaust gas channel outlet is connected to the bottom of the adsorption tower body via a pipe. The adsorption tower body is also equipped with a tower body cover located at the top of the adsorption tower body. The adsorption tower body is also equipped with an inspection door located on the side wall of the adsorption tower body. The adsorption tower body is also equipped with an explosion-proof valve located on the side wall of the adsorption tower body.
9. The electric calcining furnace flue gas purification system as described in claim 1, characterized in that: The exhaust gas purification device also includes a spray adsorption mechanism, which includes a spray nozzle, a spray pipe, a secondary circulating water pump, and valves. The spray adsorption mechanism is connected to the middle of the adsorption tower. The spray nozzle is located in the middle of the adsorption tower. The inlet of the spray nozzle is connected to the outlet of the spray pipe. The valve is installed on the spray pipe. The outlet of the secondary circulating water pump is connected to the inlet of the spray pipe. The inlet of the secondary circulating water pump is connected to the tertiary water tank. The secondary circulating water pump is located inside the tertiary water tank.
10. The electric calcining furnace flue gas purification system as described in claim 1, characterized in that: The exhaust gas purification device also includes a water vapor adsorption mechanism, which includes two or more sponge-like wire mesh plates. The two or more sponge-like wire mesh plates are staggered and spaced on both sides of the inner wall of the adsorption tower to form a serpentine channel.