A waste gas purification and treatment device for a metal smelting furnace

Abstract

The present invention relates to the technical field of waste gas purification, and discloses a waste gas purification and treatment device for a metal melting furnace, including a reaction tower. An air inlet is provided on the lower side of the reaction tower, and an air outlet is provided at the top of the reaction tower. A number of packing boxes are provided inside the reaction tower, and a spray pipe is provided above each packing box. A demister is provided at one end of the reaction tower close to the air outlet. By setting a cleaning mechanism, a first cleaning seat and a second cleaning seat are provided on the support frame. Driven by the walking seat, the first cleaning seat and the second cleaning seat slide in the gaps between the demister blades. The stains on the surfaces of the demister blades can be wiped off by the first cleaning seat and the second cleaning seat. In cooperation with the first nozzle and the second nozzle, the surfaces of the demister blades can also be rinsed during the wiping process. Compared with the simple rinsing and cleaning method, this technical solution can more effectively remove the stains on the surfaces of the demister blades.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification, and particularly to a waste gas purification and treatment device for a metal melting furnace. Background Art

[0002] A metal melting furnace is a type of furnace. According to different heating methods, it can be divided into electric melting furnaces, fuel melting furnaces, etc. During the use of a metal melting furnace, a large amount of waste gas will be generated. The sources of the waste gas mainly include three categories: First, fuel combustion: For furnaces using fuel as energy, such as coal, natural gas, oil, etc., a large amount of combustion waste gas will be generated during combustion, including soot, sulfur dioxide, nitrogen oxides, etc.; Second, decomposition and volatilization of raw materials: The heated raw materials will decompose or volatilize at high temperatures, releasing various gases and vapors. For example, some ores contain elements such as sulfur and carbon, and sulfur dioxide, carbon monoxide, etc. will be generated during the smelting process; Third, chemical reactions: In the high-temperature environment inside the furnace, chemical reactions may occur between raw materials or between raw materials and the furnace atmosphere, generating new gas products. For example, during the metal smelting process, the metal reacts with oxygen, nitrogen, etc. in the furnace gas to generate corresponding oxides, nitrides, etc. gases.

[0003] For fuel melting furnaces, a large amount of combustion waste gas will be generated during use, which has the characteristics of high temperature, large amount of soot, and complex composition. The conventional treatment means are: waste heat recovery + dust removal + deep purification, that is, first, the waste gas is subjected to waste heat recovery through a heat exchanger to lower its temperature, then the waste gas is dusted through equipment such as a bag filter, and finally the waste gas is deeply purified through a spray tower. The waste gas can be in full contact with the washing liquid and the catalyst in the packing layer in the spray tower, effectively removing impurities such as acidic gases and some organic pollutants in the waste gas. Since the waste gas after washing contains a large amount of water mist, the waste gas needs to be treated through a demister before it can enter the next environment for treatment.

[0004] During the use of the existing demister, a large amount of impurities such as dust and oil stains will adhere to the surface of the demister blades. Therefore, it is necessary to clean them regularly. The conventional cleaning method is to flush the demister blades through a nozzle with washing liquid. Since the shape of the demister blades is relatively complex, if the demister blades are simply cleaned by flushing, there will be a large number of cleaning dead corners and the cleaning effect is average. Summary of the Invention

[0005] The present invention provides a waste gas purification and treatment device for a metal melting furnace, which has the beneficial effect of being able to clean the demister more thoroughly, and solves the problem mentioned in the above background art that since the shape of the demister blades is relatively complex, if the demister blades are simply cleaned by flushing, there will be a large number of cleaning dead corners and the cleaning effect is average.

[0006] The present invention provides the following technical solution: A waste gas purification and treatment device for a metal melting furnace, including a reaction tower. An air inlet is provided on the lower side of the reaction tower, and an air outlet is provided at the top of the reaction tower. A plurality of packing boxes are provided inside the reaction tower, and a spray pipe is provided above each packing box. An eliminator is provided at one end of the reaction tower close to the air outlet;

[0007] The eliminator includes a first fixing seat and a second fixing seat, and eliminator blades are provided above the first fixing seat and the second fixing seat. One end of the eliminator blade is fixedly connected to the first fixing seat, and the other end of the eliminator blade is fixedly connected to the second fixing seat. A cleaning mechanism for cleaning the eliminator blades is provided between the first fixing seat and the second fixing seat. The cleaning mechanism includes a traveling seat, and a support frame is provided on the traveling seat. A first cleaning seat is provided on the support frame, and second cleaning seats are provided at both ends of the first cleaning seat. A waste water collection seat is provided below the eliminator blade, and the waste water collection seat is fixedly connected to the traveling seat.

[0008] As an alternative solution of the waste gas purification and treatment device for a metal melting furnace according to the present invention, wherein: The support frame includes a connecting seat, and first connecting rods are provided on both sides of the connecting seat. The first cleaning seat is fixed on the outer surface of the connecting seat.

[0009] As an alternative solution of the waste gas purification and treatment device for a metal melting furnace according to the present invention, wherein: A filter plate is provided inside the waste water collection seat, and the filter plate is elastically connected to the waste water collection seat through a first return spring.

[0010] As an alternative solution of the waste gas purification and treatment device for a metal melting furnace according to the present invention, wherein: A confluence trough is provided on the inner wall of the reaction tower. The confluence trough is located below the waste water collection seat, and a corrugated plate is provided inside the confluence trough. A top rod is provided at one end of the waste water collection seat close to the confluence trough. The top rod is slidably connected to the waste water collection seat, and the top rod abuts against the bottom of the filter plate. An inclined surface is provided on one side of the top rod close to the filter plate;

[0011] When the waste water collection seat moves driven by the traveling seat, the top rod moves horizontally back and forth under the push of the corrugated plate, and the filter plate moves up and down reciprocally under the push of the top rod.

[0012] As an alternative solution of the waste gas purification and treatment device for a metal melting furnace according to the present invention, wherein: The second cleaning seat is elastically connected to the first connecting rod through a second return spring. A plurality of top heads are provided on the filter plate, and the positions and numbers of the top heads correspond to the second cleaning seats one by one;

[0013] During the reciprocating movement of the top head above and below the filter plate, it will intermittently contact the second cleaning seat, thereby causing the second cleaning seat to slide along the first connecting rod.

[0014] As an alternative embodiment of the waste gas purification and treatment device for a metal melting furnace according to the present invention, wherein: the first connecting rod is of a hollow structure, and a plurality of first nozzles are provided on the first connecting rod. Second nozzles are symmetrically provided on the connecting seat. The second nozzles are elastically connected to the connecting seat through torsion springs, and the second nozzles are communicated with the first connecting rod through pipelines. An extension column is provided at one end of the second cleaning seat close to the connecting seat. When the second cleaning seat approaches the connecting seat, the extension column contacts the second nozzle and causes the second nozzle to deflect.

[0015] As an alternative embodiment of the waste gas purification and treatment device for a metal melting furnace according to the present invention, wherein: a connecting plate is provided on the traveling seat, the end of the connecting plate is slidably connected to the reaction tower, a second connecting rod is provided on the connecting plate, the position and quantity of the second connecting rods correspond to those of the first connecting rods one by one, and the first connecting rods located above the connecting seat are fixedly connected to the corresponding second connecting rods respectively.

[0016] As an alternative embodiment of the waste gas purification and treatment device for a metal melting furnace according to the present invention, wherein: a cleaning brush is provided on the filter plate, and the cleaning brush is elastically connected to the filter plate through a return spring. A plurality of limit blocks are provided at the upper end of the waste water collection seat, and the position and quantity of the limit blocks correspond to those of the cleaning brush one by one. An inclined surface is provided at the upper end of the cleaning brush.

[0017] As an alternative embodiment of the waste gas purification and treatment device for a metal melting furnace according to the present invention, wherein: a partition is provided at the second fixed seat, and a plurality of third nozzles are provided on the partition.

[0018] As an alternative embodiment of the waste gas purification and treatment device for a metal melting furnace according to the present invention, wherein: a traveling motor is provided on the traveling seat, a roller is provided on the output shaft of the traveling motor, and a guide rail adapted to the roller is provided on the reaction tower.

[0019] The present invention has the following beneficial effects:

[0020] 1. The waste gas purification and treatment device for a metal melting furnace, by setting a cleaning mechanism, which includes a walking seat and a support frame. On the support frame, there are a first cleaning seat and a second cleaning seat. Driven by the walking seat, the first cleaning seat and the second cleaning seat slide in the gaps between the demister blades. Through the first cleaning seat and the second cleaning seat, the stains on the surface of the demister blades can be wiped off. In cooperation with the first nozzle and the second nozzle, the surface of the demister blades can also be rinsed during the wiping process. Compared with the simple rinsing and cleaning method, this technical solution can more effectively remove the stains on the surface of the demister blades.

[0021] 2. The waste gas purification and treatment device for a metal melting furnace. In order to reduce the risk of the filter plate being blocked, the filter plate is movable in this technical solution. At one end of the waste water collection seat, there is a push rod for adjusting the filter plate. Correspondingly, there is a corrugated plate in the confluence trough. When the waste water collection seat moves along with the walking seat, the push rod moves horizontally back and forth under the push of the corrugated plate, and then pushes the filter plate to move up and down reciprocally. There is a cleaning brush that can slide on the surface of the filter plate on the filter plate. The push head can push the filter plate to move up and down reciprocally. When the filter plate moves upward, it will drive the cleaning brush to contact the limit block. The limit block, by contacting the inclined surface on the cleaning brush, can cause the cleaning brush to overcome the resistance of the return spring and slide on the filter plate, so as to achieve the purpose of cleaning the filter plate.

[0022] 3. The waste gas purification and treatment device for a metal melting furnace, by setting a support frame composed of a connecting seat and a first connecting rod, and the second cleaning seat is elastically connected to the first connecting rod. When the filter plate moves upward, it will drive the push head to move together. Through the push head, the second cleaning seat can be pushed to slide along the first connecting rod. In this way, during the movement of the cleaning mechanism, the second cleaning seat can also move back and forth reciprocally, effectively improving the cleaning effect of the second cleaning seat.

[0023] 4. The waste gas purification and treatment device for a metal melting furnace, by setting a connecting seat with a second nozzle, and the second nozzle is elastically connected to the connecting seat. At the end of the second cleaning seat, there is an extension column for adjusting the second nozzle. When the second cleaning seat approaches the connecting seat, the extension column contacts the protrusion on the second nozzle and causes the second nozzle to deflect, so as to achieve the purpose of adjusting the spraying angle of the second nozzle and effectively improving the cleaning effect of the cleaning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the present invention.

[0025] Figure 2 It is a schematic structural diagram of the demister of the present invention.

[0026] Figure 3Schematic structural diagram of the wastewater collection base of the present invention.

[0027] Figure 4 Schematic structural diagram of the partition plate of the present invention.

[0028] Figure 5 Schematic internal structural diagram of the reaction tower of the present invention.

[0029] Figure 6 Front view of the demister of the present invention.

[0030] Figure 7 Schematic internal structural diagram of the first cleaning base and the second cleaning base of the present invention.

[0031] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at position A in

[0032] In the figure: 1, reaction tower; 101, air inlet; 102, air outlet; 2, packing box; 3, demister; 301, first fixing seat; 302, second fixing seat; 303, demister blade; 4, spray pipe; 5, walking seat; 501, connecting plate; 502, second connecting rod; 6, support frame; 601, connecting seat; 602, first connecting rod; 603, first nozzle; 604, second nozzle; 605, torsion spring; 7, first cleaning base; 8, second cleaning base; 801, extension column; 9, wastewater collection base; 901, limit block; 10, filter plate; 11, first return spring; 12, confluence trough; 13, corrugated plate; 14, ejector rod; 15, second return spring; 16, ejector head; 17, cleaning brush; 18, partition plate; 19, third nozzle; 20, resilient spring; 21, walking motor; 22, roller; 23, guide rail. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1, please refer to Figures 1 to 8 , the present invention discloses a waste gas purification treatment device for a metal melting furnace, including a reaction tower 1, an air inlet 101 is provided on the lower side of the reaction tower 1, and an air outlet 102 is provided on the top of the reaction tower 1. A plurality of packing boxes 2 are provided inside the reaction tower 1, and a spray pipe 4 is provided on the upper side of each packing box 2. A demister 3 is provided at one end of the reaction tower 1 close to the air outlet 102;

[0035] The demister 3 includes a first fixed seat 301 and a second fixed seat 302. The upper sides of the first fixed seat 301 and the second fixed seat 302 are provided with demister blades 303. One end of the demister blade 303 is fixedly connected to the first fixed seat 301, and the other end of the demister blade 303 is fixedly connected to the second fixed seat 302. A cleaning mechanism for cleaning the demister blades 303 is provided between the first fixed seat 301 and the second fixed seat 302. The cleaning mechanism includes a walking seat 5, and a support frame 6 is arranged on the walking seat 5. A first cleaning seat 7 is arranged on the support frame 6, and second cleaning seats 8 are arranged at both ends of the first cleaning seat 7. A waste water collection seat 9 is arranged on the lower side of the demister blade 303, and the waste water collection seat 9 is fixedly connected to the walking seat 5.

[0036] Both the first fixed seat 301 and the second fixed seat 302 are fixedly connected to the reaction tower 1. The waste gas enters the reaction tower 1 through the air inlet 101 and then flows out through the air outlet 102. In this process, the waste gas will pass through the packing box 2, and a catalyst is arranged in the packing box 2. At the same time, cooperating with the detergent sprayed by the spray pipe 4, the impurities in the waste gas can be effectively removed. The waste gas can be demisted by the demister 3. In order to ensure the normal operation of the demister 3, it is necessary to clean the demister 3 regularly. A cleaning mechanism for cleaning the demister 3 is arranged in the reaction tower 1, which includes a walking seat 5. Driven by the walking seat 5, the first cleaning seat 7 and the second cleaning seat 8 slide in the gaps between the demister blades 303. The stains on the surfaces of the demister blades 303 can be wiped off by the first cleaning seat 7 and the second cleaning seat 8. Cooperating with the first nozzle 603 and the second nozzle 604, the surfaces of the demister blades 303 can also be rinsed during the wiping process. Compared with the simple rinsing cleaning method, the technical solution can more effectively remove the stains on the surfaces of the demister blades 303.

[0037] Embodiment 2 is an explanatory description made on the basis of Embodiment 1. Specifically, please refer to Figures 1 to 8 , the support frame 6 includes a connecting seat 601, and first connecting rods 602 are arranged on both sides of the connecting seat 601. The first cleaning seat 7 is fixed on the outer surface of the connecting seat 601.

[0038] A filter plate 10 is arranged in the waste water collection seat 9, and the filter plate 10 is elastically connected to the waste water collection seat 9 through a first return spring 11.

[0039] A confluence trough 12 is arranged on the inner wall of the reaction tower 1. The confluence trough 12 is located below the waste water collection seat 9, and a corrugated plate 13 is arranged in the confluence trough 12. One end of the waste water collection seat 9 close to the confluence trough 12 is provided with a top rod 14. The top rod 14 is slidably connected to the waste water collection seat 9, and the top rod 14 abuts against the bottom of the filter plate 10. An inclined surface is arranged on the side of the top rod 14 close to the filter plate 10;

[0040] When the wastewater collection seat 9 moves driven by the walking seat 5, the ejector rod 14 moves horizontally back and forth under the push of the corrugated plate 13, and the filter plate 10 moves up and down reciprocally under the push of the ejector rod 14.

[0041] The second cleaning seat 8 is elastically connected to the first connecting rod 602 through the second return spring 15. A number of ejector heads 16 are provided on the filter plate 10, and the positions and quantities of the ejector heads 16 correspond to those of the second cleaning seat 8 one by one.

[0042] During the up and down reciprocating movement of the filter plate 10, the ejector heads 16 will intermittently contact the second cleaning seat 8, thereby causing the second cleaning seat 8 to slide along the first connecting rod 602.

[0043] A large amount of sewage will be generated when the cleaning mechanism is working. If it is not treated, the sewage will directly drip onto the packing box 2, thereby blocking the air holes on the packing box 2. For this reason, in this technical solution, a wastewater collection seat 9 is provided on the lower side of the demister blade 303, and a filter plate 10 is provided in the wastewater collection seat 9 for filtering sewage. Correspondingly, a confluence trough 12 is also provided on the inner wall of the reaction tower 1. The sewage collected by the wastewater collection seat 9 will flow into the confluence trough 12 and then flow out of the reaction tower 1 through the confluence trough 12.

[0044] During the actual use process, since the lower end of the demister blade 303 is in contact with the waste gas first, more dust will accumulate on the lower side of the demister blade 303. In order to improve the cleaning effect of the cleaning mechanism, this technical solution makes a special design for the support frame 6. The support frame 6 is composed of a connecting seat 601 and a first connecting rod 602. The second cleaning seat 8 is elastically connected to the first connecting rod 602. When the filter plate 10 moves upward, it will drive the ejector heads 16 to move together. Through the ejector heads 16, the second cleaning seat 8 can be pushed to slide along the first connecting rod 602. In this way, during the movement of the cleaning mechanism, the second cleaning seat 8 can also reciprocate back and forth, effectively improving the cleaning effect of the second cleaning seat 8.

[0045] Embodiment 3 is an explanatory description made on the basis of Embodiment 1. Specifically, please refer to Figures 1 to 8 , the first connecting rod 602 is of a hollow structure, and a number of first nozzles 603 are provided on the first connecting rod 602. Second nozzles 604 are symmetrically provided on the connecting seat 601. The second nozzles 604 are elastically connected to the connecting seat 601 through torsion springs 605, and the second nozzles 604 are communicated with the first connecting rod 602 through pipelines. An extension column 801 is provided at one end of the second cleaning seat 8 close to the connecting seat 601. When the second cleaning seat 8 approaches the connecting seat 601, the extension column 801 contacts the second nozzle 604 and causes the second nozzle 604 to deflect.

[0046] The walking base 5 is provided with a connecting plate 501. The end of the connecting plate 501 is slidably connected to the reaction tower 1. The connecting plate 501 is provided with a second connecting rod 502. The positions and quantities of the second connecting rods 502 correspond one by one to those of the first connecting rods 602. The first connecting rods 602 located above the connecting seat 601 are fixedly connected to the corresponding second connecting rods 502 respectively.

[0047] Openings for the second nozzle 604 to expose are provided on the connecting seat 601 and the first cleaning base 7. Correspondingly, openings for the first nozzle 603 to expose are also provided on the second cleaning base 8. The second nozzle 604 is elastically connected to the connecting seat 601. An extension column 801 for adjusting the second nozzle 604 is provided at the end of the second cleaning base 8. When the second cleaning base 8 approaches the connecting seat 601, the extension column 801 abuts against the protrusion on the second nozzle 604 and prompts the second nozzle 604 to deflect, so as to achieve the purpose of adjusting the spraying angle of the second nozzle 604 and effectively improve the cleaning effect of the cleaning mechanism.

[0048] The first connecting rod 602 is of a hollow structure. A joint for connecting an external water pump is provided on the first connecting rod 602. During flushing, water flows into the first connecting rod 602 through the joint, and then enters the second nozzle 604 through a pipeline, and finally can achieve the effect of spraying through the first nozzle 603 and the second nozzle 604.

[0049] Embodiment 4 is an explanatory description made on the basis of Embodiment 1. Specifically, please refer to Figures 1 to 8 , a cleaning brush 17 is provided on the filter plate 10, and the cleaning brush 17 is elastically connected to the filter plate 10 through a resilient spring 20. A number of limit blocks 901 are provided at the upper end of the waste water collection base 9, and the positions and quantities of the limit blocks 901 correspond one by one to those of the cleaning brush 17. The upper end of the cleaning brush 17 is provided with an inclined surface.

[0050] A partition plate 18 is provided at the second fixing seat 302, and a number of third nozzles 19 are provided on the partition plate 18.

[0051] A walking motor 21 is provided on the walking base 5. A roller 22 is provided on the output shaft of the walking motor 21. A guide rail 23 that fits with the roller 22 is provided on the reaction tower 1.

[0052] To reduce the risk of the filter plate 10 being blocked, the filter plate 10 is movable in this technical solution. At one end of the wastewater collection seat 9, there is a push rod 14 for adjusting the filter plate 10. Correspondingly, in the confluence trough 12, there is a corrugated plate 13. When the wastewater collection seat 9 moves together with the walking seat 5, the push rod 14 moves horizontally back and forth under the push of the corrugated plate 13, and then pushes the filter plate 10 to move up and down reciprocally. There is a cleaning brush 17 that can slide on the surface of the filter plate 10. The push head 16 can push the filter plate 10 to move up and down reciprocally. When the filter plate 10 moves upward, it will drive the cleaning brush 17 to contact the limit block 901. The limit block 901 can make the cleaning brush 17 overcome the resistance of the return spring 20 and slide on the filter plate 10 by contacting the inclined surface on the cleaning brush 17, so as to achieve the purpose of cleaning the filter plate 10;

[0053] At the second fixing seat 302, there is a partition plate 18. The position and quantity of the partition plate 18 correspond one-to-one with the demister blades 303. The partition plate 18 is of a hollow structure. There are several third nozzles 19 on the partition plate 18. The cleaning mechanism entering the gap of the partition plate 18 can be cleaned through the third nozzles 19, improving the cleaning effect of the cleaning mechanism. The walking seat 5 can move along the guide rail 23 driven by the walking motor 21.

[0054] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0055] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. An exhaust gas purification and treatment device for a metal smelting furnace, comprising a reaction tower, an air inlet is provided on the lower side of the reaction tower, and an air outlet is provided at the top of the reaction tower, and it is characterized in that: Inside the reaction tower, there are several packing boxes, and a spray pipe is provided above each packing box. An eliminator is provided at one end of the reaction tower close to the air outlet; The eliminator includes a first fixing seat and a second fixing seat. Above the first fixing seat and the second fixing seat, there are eliminator blades. One end of the eliminator blade is fixedly connected to the first fixing seat, and the other end of the eliminator blade is fixedly connected to the second fixing seat. A cleaning mechanism for cleaning the eliminator blades is provided between the first fixing seat and the second fixing seat. The cleaning mechanism includes a traveling seat, and a support frame is provided on the traveling seat. A first cleaning seat is provided on the support frame, and second cleaning seats are provided at both ends of the first cleaning seat. A waste water collection seat is provided below the eliminator blade, and the waste water collection seat is fixedly connected to the traveling seat; A filter plate is provided inside the waste water collection seat, and the filter plate is elastically connected to the waste water collection seat through a first return spring; A confluence trough is provided on the inner wall of the reaction tower. The confluence trough is located below the waste water collection seat, and a corrugated plate is provided inside the confluence trough. A top rod is provided at one end of the waste water collection seat close to the confluence trough. The top rod is slidably connected to the waste water collection seat, and the top rod abuts against the bottom of the filter plate. An inclined surface is provided on one side of the top rod close to the filter plate; When the waste water collection seat moves driven by the traveling seat, the top rod moves horizontally back and forth under the push of the corrugated plate, and the filter plate moves up and down back and forth under the push of the top rod.

2. The waste gas purification and treatment device for a metal melting furnace according to claim 1, characterized in that: The support frame includes a connecting seat, and first connecting rods are provided on both sides of the connecting seat. The first cleaning seat is fixed on the outer surface of the connecting seat.

3. The metal smelting furnace waste gas purification and treatment device according to claim 2, characterized in that: The second cleaning seat is elastically connected to the first connecting rod through a second return spring. Several ejecting heads are provided on the filter plate, and the positions and numbers of the ejecting heads correspond to those of the second cleaning seats one by one; During the up and down reciprocating movement of the filter plate, the ejecting heads will intermittently abut against the second cleaning seats, thereby causing the second cleaning seats to slide along the first connecting rods.

4. The waste gas purification and treatment device for a metal melting furnace according to claim 3, wherein: The first connecting rod is of a hollow structure, and several first nozzles are provided on the first connecting rod. Second nozzles are symmetrically provided on the connecting seat. The second nozzles are elastically connected to the connecting seat through torsion springs, and the second nozzles are communicated with the first connecting rod through pipelines. An extension column is provided at one end of the second cleaning seat close to the connecting seat. When the second cleaning seat approaches the connecting seat, the extension column abuts against the second nozzle and causes the second nozzle to deflect.

5. The waste gas purification and treatment device for a metal melting furnace according to claim 4, wherein: A connecting plate is provided on the traveling seat. The end of the connecting plate is slidably connected to the reaction tower. A second connecting rod is provided on the connecting plate, and the positions and numbers of the second connecting rods correspond to those of the first connecting rods one by one. The first connecting rods located above the connecting seat are respectively fixedly connected to the corresponding second connecting rods.

6. The metal smelting furnace waste gas purification and treatment device according to claim 5, characterized in that: A cleaning brush is provided on the filter plate, and the cleaning brush is elastically connected to the filter plate through a resilient spring. A plurality of limit blocks are provided at the upper end of the waste water collection seat, and the positions and quantities of the limit blocks correspond to the cleaning brushes one by one. An inclined surface is provided at the upper end of the cleaning brush.

7. The waste gas purification and treatment device for a metal melting furnace according to claim 6, characterized in that: A partition is provided at the second fixing seat, and a plurality of third nozzles are provided on the partition.

8. The waste gas purification and treatment device for a metal melting furnace according to claim 7, characterized in that: A traveling motor is provided on the traveling seat, a roller is provided on the output shaft of the traveling motor, and a guide rail that fits with the roller is provided on the reaction tower.

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