A gas purification system for a smelting furnace

Abstract

The present application relates to the technical field of metal powder processing, and discloses a gas purification system for a smelting furnace, including a smelting furnace, a heat exchange device, a filter box and a driving device, wherein the heat exchange device is provided with two groups of heat exchange tubes, and the two groups of heat exchange tubes are respectively connected to the filter box and the driving device through pipelines, and a vibration mechanism is provided inside the filter box, and a filter assembly is provided on the vibration mechanism, and a sealing mechanism is provided on the filter box, and a collection assembly is provided on the sealing mechanism, and a preheating mechanism is provided on the gas outlet pipe. The present invention realizes efficient heat transfer between exhaust gas and purified gas through two groups of heat exchange tubes, and optimizes the inert gas circulation, improves the utilization rate and protects the equipment by combining the filter assembly and the temperature sensor, and the vibration mechanism and the collection assembly realize automatic cleaning of the filter assembly and reduce maintenance downtime; the waste heat of the exhaust gas is recovered by the heat transfer plate to preheat the inert gas, reduce energy consumption, and improve energy-saving and environmental protection performance.

Description

Technical Field

[0001] The invention relates to the technical field of metal powder processing, in particular to a gas purification system for a smelting furnace. Background Art

[0002] In the process of metal powder processing, the melting furnace needs to use inert gas (such as argon, nitrogen, etc.) to prevent metal oxidation. At the same time, the exhaust gas is often accompanied by metal vapor, dust and high-temperature waste heat. In this process, how to efficiently purify the exhaust gas, recover the waste heat and stabilize the inert gas circulation are key issues that need to be solved in the existing technology.

[0003] Gas purification systems usually include a single-stage heat exchange device, a filter device and a drive device, and are mainly used in industrial equipment such as smelting furnaces to treat particulate matter, metal vapor and waste heat in exhaust gas, while recycling inert gas;

[0004] For the existing gas purification system, firstly, the exhaust gas is simply filtered and then returned to the smelting furnace. The temperature of the circulating gas is often unstable, and the fluctuation directly affects the reliability of the smelting environment, which can easily lead to oxidation or other quality problems in the metal powder processing process; secondly, the traditional filtering device has dust and metal vapor that are continuously deposited on the surface of the filter, resulting in a decrease in filtration efficiency. The system often needs to be shut down regularly to disassemble the filter for manual cleaning. The manual cleaning workload is large, which can easily affect the normal operation of the equipment and significantly reduce production efficiency; finally, in the prior art, the existing gas purification system mostly uses a single heat exchange device to simply process the waste heat of the exhaust gas. Most of the heat energy is directly dissipated into the environment, resulting in energy waste. Additional energy is also required to heat the inert gas. After long-term operation, not only the production cost is high, but also a gas purification system for a smelting furnace is proposed to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a gas purification system for a smelting furnace, which solves the problems of waste heat, complex maintenance and low gas utilization efficiency in the prior gas purification system.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A gas purification system for a smelting furnace, comprising a smelting furnace, a heat exchange device, a filter box and a driving device, wherein the heat exchange device is provided with two groups of heat exchange tubes, the A end and the B end of the smelting furnace are respectively connected to the heat exchange tubes through an air inlet pipe and an air outlet pipe, the two groups of heat exchange tubes are respectively connected to the filter box and the driving device through pipelines, a vibration mechanism is provided inside the filter box, a filter assembly is provided on the vibration mechanism, a sealing mechanism is provided on the filter box, a collection assembly is provided on the sealing mechanism, and a preheating mechanism is provided on the air outlet pipe;

[0007] The vibration mechanism includes two fixing plates, which are arranged on the inner top wall of the filter box. The fixing plates are connected to flexible mounting plates by bolts. A plurality of mounting frames are longitudinally distributed equidistantly between the flexible mounting plates, and the mounting frames are each provided with a vibration motor.

[0008] Preferably, the filter assembly comprises a metal filter, a ceramic fiber filter and an activated carbon filter, and the metal filter, the ceramic fiber filter and the activated carbon filter are arranged inside the installation frame in sequence from top to bottom.

[0009] Preferably, the sealing mechanism includes a sealing plate, which is connected to the filter box by bolts, and a plurality of groups of longitudinally arranged sealing rings are arranged inside the sealing plate, and a plurality of groups of racks 2 are annularly distributed inside the sealing rings, and the racks 2 are meshingly connected with gear 1, and a baffle is arranged on the gear 1, and the gear 1 is connected to the sealing plate by a limiting column, and a transmission assembly is arranged on the sealing plate.

[0010] Preferably, the transmission assembly includes multiple groups of rack 1s, and the multiple groups of rack 1s are respectively arranged on the outside of the sealing rings. Gear 2s are arranged between the sealing rings, and the gear 2s are respectively meshed and connected with the rack 1s. A sealed motor is arranged on the sealing plate, and the output end of the sealed motor is fixedly connected to one of the gear 2s.

[0011] Preferably, the collecting assembly includes a collecting box, which is connected to the sealing plate in the sealing mechanism through a collecting tube, a collecting bag and a fan are arranged in the collecting box, the collecting bag is connected to the collecting tube, and a replacement assembly is arranged on the top of the collecting box.

[0012] Preferably, the replacement assembly comprises a sliding cover, the sliding cover is arranged on the top of the collection box, and a pull ring is fixedly connected to the front side of the sliding cover.

[0013] Preferably, the preheating mechanism includes a preheating sleeve, which is arranged on the air outlet pipe, a heat transfer plate is arranged inside the preheating sleeve, a circulation pipe 1 is arranged between the preheating sleeve and the heat transfer plate, a circulation pipe 2 is arranged on the D end of the filter box and the pipeline of the driving device, the circulation pipe 1 is connected to the a end of the circulation pipe 2 through a water pipe, and the b end of the circulation pipe 2 is connected to the medium conveying component through a water pipe.

[0014] Preferably, the medium conveying assembly includes a water tank, which is connected to the b end of the circulation pipe 2 through a water pipe. A water pump is provided on the water tank, and the output end of the water pump is connected to the circulation pipe 1 through a water pipe, and the input end of the water pump is connected to the inside of the water tank through a water pipe.

[0015] Preferably, a temperature sensor is provided on the air intake pipe, and the temperature sensor transmits the collected data to a central control system;

[0016] Preferably, the central control system includes:

[0017] Acquisition module: It is used to transmit the data collected by the temperature sensor to the central control system;

[0018] Analysis module: It analyzes the data collected in the central control system through the data processing unit;

[0019] Driving module: It drives the heat exchange device through the analyzed information.

[0020] The present invention provides a gas purification system for a smelting furnace, which has the following beneficial effects:

[0021] 1. The present invention achieves the technical effect of efficiently utilizing the waste heat of the exhaust gas and stabilizing the circulation temperature of the inert gas by transferring heat between the exhaust gas and the purified gas in two groups of heat exchange tubes respectively, filtering through the filter assembly and real-time detection by the temperature sensor. It can effectively purify the inert gas, improve the utilization rate of the inert gas, save production costs, and avoid the influence of metal vapor on production equipment.

[0022] 2. The present invention realizes automatic cleaning of the filter assembly by combining a vibration mechanism with a collection assembly. The vibration motor drives the filter frame to vibrate, and the dust on the filter screen is effectively stripped off and collected in a centralized manner. Compared with the prior art method in which the filter needs to be manually disassembled and cleaned, it not only reduces the workload, but also avoids the efficiency loss caused by frequent shutdowns for maintenance, and the operation is more stable.

[0023] 3. The present invention utilizes a heat transfer plate to transfer the heat of the exhaust gas to the water in the circulation pipe 1, and preheats the inert gas through the circulation pipe 2, thereby achieving efficient utilization of the heat in the exhaust gas and reducing the energy consumption of heating the inert gas, making up for the defects of waste heat waste and high preheating cost in the traditional system, and improving the energy-saving and environmental protection performance of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a front structural schematic diagram of the present invention;

[0026] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the right side cross-sectional structure of the filter box of the present invention;

[0028] Figure 5 It is a schematic diagram of the front cross-sectional structure of the filter box of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the collection component of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the sealing mechanism of the present invention;

[0031] Figure 8 is a schematic cross-sectional structure diagram of a heat exchange device of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of the preheating mechanism of the present invention;

[0033] Fig.10 It is a flow chart of the central control system of the present invention.

[0034] Among them, 1. smelting furnace; 2. heat exchange device; 3. heat exchange tube; 4. filter box; 5. vibration mechanism; 501. fixing plate; 502. flexible mounting plate; 503. vibration motor; 504. mounting frame; 6. filter assembly; 601. metal filter; 602. ceramic fiber filter; 603. activated carbon filter; 7. sealing mechanism; 701. sealing plate; 702. sealing ring; 703. rack 1; 704. rack 2; 705. gear 1; 706. limit Column; 707, baffle; 708, sealed motor; 709, gear two; 8, collecting assembly; 801, collecting tube; 802, collecting box; 803, collecting bag; 804, sliding cover; 805, pull ring; 806, fan; 9, preheating mechanism; 901, preheating tube sleeve; 902, heat transfer plate; 903, circulation tube one; 904, circulation tube two; 905, water tank; 906, water pump; 10, driving device; 11, air inlet pipe; 12, air outlet pipe; 13, temperature sensor. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Please refer to the attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 8, an embodiment of the present invention provides a gas purification system for a smelting furnace, comprising a smelting furnace 1, a heat exchange device 2, a filter box 4 and a driving device 10, wherein the heat exchange device 2 is provided with two groups of heat exchange tubes 3, and the A end and the B end of the smelting furnace 1 are respectively connected to the heat exchange tubes 3 through an air inlet pipe 11 and an air outlet pipe 12, and the two groups of the heat exchange tubes 3 are respectively connected to the filter box 4 and the driving device 10 through pipelines, wherein the A end of the smelting furnace 1 is an air inlet, the B end is an exhaust port, the C end of the filter box 4 is a first filter port, and the D end is a second filter port;

[0037] The smelting furnace 1 is the main equipment for metal powder processing, and the heat exchange device 2 is responsible for the key heat regulation task in the whole system. Through the ingenious heat exchange principle, the exhaust gas temperature can be accurately adjusted so that it can adapt to the subsequent purification treatment link, and the circulating gas can be preheated to improve energy efficiency. The filter box 4 is the core purification unit of the purification system, which is designed to deeply purify the exhaust gas after heat exchange treatment. The driving device 10 is the power source for realizing the circulation of gas in the whole purification system, ensuring the normal operation of the system and the effective performance of various functions.

[0038] Please refer to the attached Figure 4 -Attached Figure 5 , a vibration mechanism 5 is arranged inside the filter box 4, and the vibration mechanism 5 includes two fixing plates 501, and the two fixing plates 501 are arranged on the inner top wall of the filter box 4, and the fixing plates 501 are connected with flexible mounting plates 502 by bolts, and a plurality of mounting frames 504 are longitudinally distributed and equidistant between the flexible mounting plates 502, and the mounting frames 504 are each provided with a vibration motor 503, and the vibration mechanism 5 is provided with a filter assembly 6;

[0039] The main function of the fixing plate 501 is to provide a stable support and fixed foundation for the entire vibration mechanism 5. The flexible mounting plate 502 can adjust the transmission direction and amplitude of the vibration to a certain extent, so that the vibration generated by the vibration motor 503 can be more evenly and gently transmitted to the mounting frame 504 and the filter component 6, avoiding damage to the filter component 6 or a decrease in the filtering effect due to excessive or uneven vibration. The mounting frame 504 can ensure that the filter component 6 is firm and stable after installation and will not be displaced or fall off due to vibration, providing a reliable hardware foundation for the filtering work of the entire filter box 4, and ensuring the effective interception and purification of various pollutants in the exhaust gas of the smelting furnace 1. The vibration motor 503 is the core component of the vibration mechanism 5 for generating vibration, which can destroy the adhesion between the particulate matter and the surface of the filter component 6, so that the particulate matter can be separated from the filter component 6 under the action of gravity and vibration inertia.

[0040] Please refer to the attached Figure 4The filter assembly 6 includes a metal filter 601, a ceramic fiber filter 602 and an activated carbon filter 603, and the metal filter 601, the ceramic fiber filter 602 and the activated carbon filter 603 are arranged inside the installation frame 504 in sequence from top to bottom;

[0041] The metal filter 601 can intercept larger solid particles in the exhaust gas; the ceramic fiber filter 602 further filters out those fine particles with smaller particle sizes that may still cause damage to the environment and equipment; the activated carbon filter 603 deeply adsorbs and purifies harmful gas components in the exhaust gas (such as sulfur dioxide, nitrogen oxides, volatile organic compounds, etc.).

[0042] Please see attached Figure 5 and attached Figure 7 , the filter box 4 is provided with a sealing mechanism 7, the sealing mechanism 7 includes a sealing plate 701, the sealing plate 701 is connected to the filter box 4 by bolts, a plurality of groups of longitudinally arranged sealing rings 702 are arranged inside the sealing plate 701, a plurality of groups of racks 704 are arranged in an annular distribution inside the sealing ring 702, the racks 704 are meshed and connected with a gear 1 705, a baffle 707 is provided on the gear 1 705, the gear 1 705 is connected to the sealing plate 701 by a limiting column 706, and a transmission assembly is provided on the sealing plate 701;

[0043] The sealing plate 701 covers the part of the filter box 4 that needs to be sealed, and as the installation body of the sealing mechanism 7, the sealing ring 702 plays a key auxiliary role, which can provide a position for the installation of the rack 2 704 and the rack 1 703, and is also the key to realize the rotation. The meshing connection between the rack 2 704 and the gear 1 705 is a key link in the transmission system of the sealing mechanism 7. The gear 1 705, as the core component of the transmission conversion, can drive the baffle 707 to rotate when it is affected by the transmission of the rack 2 704, and open the collection channel under the restriction of the limit column 706.

[0044] The transmission assembly includes a plurality of racks 1 703, which are respectively arranged outside the sealing rings 702, and gears 2 709 are arranged between the sealing rings 702, and the gears 2 709 are respectively meshed and connected with the racks 1 703, and a sealing motor 708 is arranged on the sealing plate 701, and the output end of the sealing motor 708 is fixedly connected with one of the gears 2 709;

[0045] Rack 1 703 is an important element for achieving power transmission and coordinated movement of sealing ring 702. When sealing motor 708 drives one of gears 2 709 to rotate, the meshing action of gear 2 709 and rack 1 703 can drive the adjacent sealing ring 702 to move synchronously.

[0046] Please see attached Figure 5 -Attached Figure 6 The sealing mechanism 7 is provided with a collecting assembly 8, and the collecting assembly 8 includes a collecting box 802, and the collecting box 802 is connected to the sealing plate 701 in the sealing mechanism 7 through a collecting pipe 801, and a collecting bag 803 and a fan 806 are arranged in the collecting box 802, and the collecting bag 803 is connected to the collecting pipe 801, and a replacement assembly is arranged on the top of the collecting box 802;

[0047] The collecting box 802, as the core part of the collecting assembly 8, undertakes the important task of containing and storing the collected impurities. The collecting tube 801 ensures that the impurities cleaned from the sealing mechanism 7 can smoothly pass through the collecting tube 801 into the collecting box 802. The collecting bag 803 can effectively capture and contain the tiny particle impurities that enter the collecting box 802 through the collecting tube 801. The fan 806 plays a key power role in the impurity collection process. By generating a certain negative pressure, the impurities at the sealing mechanism 7 are sucked into the collecting tube 801 and finally sent into the collecting bag 803.

[0048] The replacement component includes a sliding cover 804, which is arranged on the top of the collection box 802. A pull ring 805 is fixedly connected to the front side of the sliding cover 804. The sliding cover 804 ensures the sealing of the inside of the collection box 802 during normal operation to prevent impurities from leaking and external pollutants from entering. The pull ring 805 is a humanized detail designed to facilitate operators to open the sliding cover 804.

[0049] Please see attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Fig. 9 The outlet pipe 12 is provided with a preheating mechanism 9, and the preheating mechanism 9 includes a preheating sleeve 901, which is provided on the outlet pipe 12, and a heat transfer plate 902 is provided inside the preheating sleeve 901, and a circulation pipe 1 903 is provided between the preheating sleeve 901 and the heat transfer plate 902, and a circulation pipe 2 904 is provided on the pipeline between the D end of the filter box 4 and the driving device 10, and the circulation pipe 1 903 is connected to the a end of the circulation pipe 2 904 through a water pipe, and the b end of the circulation pipe 2 904 is connected to a medium conveying component through a water pipe;

[0050] The outlet pipe 12 is a key channel for exhaust gas to be discharged. The preheating pipe sleeve 901 is tightly sleeved on the outlet pipe 12 to ensure good thermal contact between the two so that the heat in the exhaust gas can be efficiently absorbed. An insulation layer may be provided on the outside of the preheating pipe sleeve 901 to reduce the loss of heat to the surrounding environment, further improve the heat recovery efficiency, so that the heat absorbed from the exhaust gas can be transferred to the internal heat transfer medium as much as possible, provide a sufficient energy source for the subsequent heat utilization link, and ensure the stable operation and high efficiency of the preheating mechanism 9. The heat transfer plate 902 is usually made of a metal material with a high thermal conductivity, such as a copper plate or an aluminum plate, which lays a solid foundation for the subsequent heat transfer to the circulating medium and improves the overall heat exchange efficiency and performance of the preheating mechanism 9. The circulation pipe 903 is arranged in the preheating pipe sleeve 901 tightly around the heat transfer plate 902 to ensure that there is sufficient contact area with the heat transfer plate 902 so that the heat on the heat transfer plate 902 can be efficiently absorbed. The heat transfer medium (such as water or other suitable liquid) flowing in the tube will quickly absorb the heat transferred by the heat transfer plate 902 when passing through the circulation tube 1 903, thereby increasing its own temperature. In this way, the heat in the exhaust gas is effectively transferred to the heat transfer medium, realizing the initial recovery of energy. The circulation tube 2 904 is set in the gas pipeline after preliminary filtration and the air intake pipeline of the driving device 10, so that in this link, the heat recovered from the exhaust gas can be used to preheat the gas that is about to enter the driving device 10 and further participate in the system circulation;

[0051] The medium conveying assembly includes a water tank 905, which is connected to the b end of the circulation pipe 2 904 through a water pipe. A water pump 906 is arranged on the water tank 905. The output end of the water pump 906 is connected to the circulation pipe 1 903 through a water pipe, and the input end of the water pump 906 is connected to the inside of the water tank 905 through a water pipe. The water tank 905 serves as a storage container for the heat transfer medium. The main function of the water pump 906 is to provide sufficient power for the heat transfer medium so that it can flow continuously and stably in the circulation system of the water tank 905, the circulation pipe 1 903, the circulation pipe 2 904 and the entire preheating mechanism 9.

[0052] Please refer to the attached Figure 1 -Attached Figure 3 A temperature sensor 13 is provided on the air intake pipe 11. The temperature sensor 13 transmits the collected data to the central control system. The air intake pipe 11 is a key channel for gas to enter the system. The temperature sensor 13 provides a key basis for subsequent control and adjustment operations, ensuring that the entire gas purification system can be optimized according to the actual temperature of the gas, thereby improving the stability and purification efficiency of the system.

[0053] Please refer to the attached Fig.10 , the central control system comprises:

[0054] Acquisition module: used to transmit the collected data from the temperature sensor 13 to the central control system;

[0055] Analysis module: It analyzes the data collected in the central control system through the data processing unit;

[0056] Driving module: it drives the heat exchange device 2 through the analyzed information.

[0057] Working principle: When the smelting furnace 1 is working, the exhaust gas generated enters the heat exchange tube 3 in the heat exchange device 2 through the exhaust port and the outlet pipe 12, and then undergoes a cooling treatment by the heat exchange device 2. The cooled exhaust gas enters from the first filter port of the filter box 4, and is filtered through the metal filter 601, the ceramic fiber filter 602 and the activated carbon filter 603 in sequence;

[0058] Under the power support of the driving device 10, the filtered gas is discharged from the second filter port of the filter box 4 into another group of heat exchange tubes 3 in the heat exchange device 2, the heat exchange device 2 heats up the filtered inert gas, the temperature sensor 13 detects the temperature of the inert gas, and the central control system adjusts the power of the heat exchange device 2 so that the temperature of the inert gas circulating back to the smelting furnace 1 reaches the standard, and the heated inert gas enters the smelting furnace 1 through the air inlet pipe 11 and the air inlet pipe 11, forming a closed-loop circulation of the inert gas;

[0059] The exhaust gas generated by the smelting furnace 1 during operation contains residual heat. When the exhaust gas flows through the gas outlet pipe 12, the water pump 906 pumps the water in the water tank 905 to the circulation pipe 1 903. Then, the heat transfer plate 902 transfers part of the residual heat to the water in the circulation pipe 1 903, so that the water in the circulation pipe 1 903 is heated. The heated water flows to the circulation pipe 2 904 to preheat the filtered inert gas.

[0060] After the processing is completed, the sealing motor 708 is started, and the sealing motor 708 rotates the gear 2 709. The gear 2 709 rotates the sealing ring 702 through the meshing relationship with the rack 1 703. The rack 2 704 inside the rotating sealing ring 702 also rotates. The rack 2 704 rotates the gear 1 705 through the meshing relationship with the gear 1 705. During the rotation process, the gear 1 705 is restricted by the limit column 706, so that the baffle 707 is opened;

[0061] Then, the vibration motor 503 on the installation frame 504 is started, and the vibration motor 503 causes the installation frame 504 and the flexible installation plate 502 to vibrate, and the dust attached to the metal filter 601, the ceramic fiber filter 602, and the activated carbon filter 603 is lifted up through the vibration. Then, the fan 806 is started, and the fan 806 creates a negative pressure in the collection box 802, so that the lifted dust is collected into the collection bag 803 through the collection pipe 801. After the dust collection work is completed, pull the pull ring 805 to open the sliding cover 804, and then the collection bag 803 in the collection box 802 can be taken out.

[0062] 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 gas purification system for a smelting furnace, comprising a smelting furnace (1), a heat exchange device (2), a filter box (4) and a drive device (10), characterized in that: The heat exchange device (2) is provided with two groups of heat exchange tubes (3); the A end and the B end of the smelting furnace (1) are respectively connected to the heat exchange tubes (3) through an air inlet pipe (11) and an air outlet pipe (12); the two groups of heat exchange tubes (3) are respectively connected to a filter box (4) and a drive device (10) through pipelines; a vibration mechanism (5) is provided inside the filter box (4); a filter assembly (6) is provided on the vibration mechanism (5); a sealing mechanism (7) is provided on the filter box (4); a collection assembly (8) is provided on the sealing mechanism (7); and a preheating mechanism (9) is provided on the air outlet pipe (12); The vibration mechanism (5) comprises two fixing plates (501), the two fixing plates (501) being arranged on the inner top wall of the filter box (4), the fixing plates (501) being connected to flexible mounting plates (502) by bolts, a plurality of mounting frames (504) being equidistantly distributed longitudinally between the flexible mounting plates (502), and the mounting frames (504) being provided with vibration motors (503); The sealing mechanism (7) comprises a sealing plate (701), the sealing plate (701) being connected to the filter box (4) by means of bolts, a plurality of groups of longitudinally arranged sealing rings (702) being arranged inside the sealing plate (701), a plurality of groups of racks (704) being arranged in an annular manner inside the sealing rings (702), the racks (704) being meshingly connected with gears (705), a baffle (707) being arranged on the gears (705), the gears (705) being connected to the sealing plate (701) by means of limiting columns (706), and a transmission assembly being arranged on the sealing plate (701).

2. A gas purification system for a smelting furnace according to claim 1, characterized in that: The filter assembly (6) comprises a metal filter (601), a ceramic fiber filter (602) and an activated carbon filter (603), wherein the metal filter (601), the ceramic fiber filter (602) and the activated carbon filter (603) are arranged in sequence from top to bottom inside the installation frame (504).

3. A gas purification system for a smelting furnace according to claim 1, characterized in that: The transmission assembly comprises a plurality of groups of rack gears 1 (703), the plurality of groups of rack gears 1 (703) being respectively arranged on the outside of the sealing rings (702), gear gears 2 (709) being respectively arranged between the sealing rings (702), the gear gears 2 (709) being respectively meshed and connected with the rack gears 1 (703), a sealing motor (708) being arranged on the sealing plate (701), and an output end of the sealing motor (708) being fixedly connected with one of the gear gears 2 (709).

4. A gas purification system for a smelting furnace according to claim 1, characterized in that: The collecting assembly (8) comprises a collecting box (802), the collecting box (802) being connected to the sealing plate (701) in the sealing mechanism (7) via a collecting tube (801), a collecting bag (803) and a fan (806) being arranged in the collecting box (802), the collecting bag (803) being connected to the collecting tube (801), and a replacement assembly being arranged on the top of the collecting box (802).

5. A gas purification system for a smelting furnace according to claim 4, characterized in that: The replacement assembly comprises a sliding cover (804), wherein the sliding cover (804) is arranged on the top of the collection box (802), and a pull ring (805) is fixedly connected to the front side of the sliding cover (804).

6. A gas purification system for a smelting furnace according to claim 1, characterized in that: The preheating mechanism (9) comprises a preheating sleeve (901), the preheating sleeve (901) being arranged on the air outlet pipe (12), a heat transfer plate (902) being arranged inside the preheating sleeve (901), a circulation pipe 1 (903) being arranged between the preheating sleeve (901) and the heat transfer plate (902), a circulation pipe 2 (904) being arranged on the D end of the filter box (4) and the pipeline of the driving device (10), the circulation pipe 1 (903) being connected to the a end of the circulation pipe 2 (904) via a water pipe, and the b end of the circulation pipe 2 (904) being connected to a medium conveying assembly via a water pipe.

7. A gas purification system for a smelting furnace according to claim 6, characterized in that: The medium conveying assembly comprises a water tank (905), the water tank (905) being connected to the end b of the second circulation pipe (904) via a water pipe, a water pump (906) being arranged on the water tank (905), the output end of the water pump (906) being connected to the first circulation pipe (903) via a water pipe, and the input end of the water pump (906) being connected to the interior of the water tank (905) via a water pipe.

8. A gas purification system for a smelting furnace according to claim 1, characterized in that: The air intake pipe (11) is provided with a temperature sensor (13), and the temperature sensor (13) transmits collected data to a central control system.

9. A gas purification system for a smelting furnace according to claim 8, characterized in that: The central control system comprises: A collection module: used for transmitting the data collected by the temperature sensor (13) to a central control system; Analysis module: It analyzes the data collected in the central control system through the data processing unit; A driving module drives the heat exchange device (2) through the analyzed information.

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