Environment-friendly smelting tail gas treatment equipment

Abstract

The application relates to the field of tail gas treatment, in particular to a smelting tail gas treatment equipment based on environmental protection, which comprises a shell, an air inlet pipe, an air outlet pipe, an upper partition plate, a lower partition plate and a dust removal cloth bag and the like; the shell is connected with the air inlet pipe; the shell is connected with the air outlet pipe; the shell is fixedly connected with the upper partition plate in the inside; the shell is fixedly connected with the lower partition plate in the inside; a plurality of through holes are formed in the upper partition plate and the lower partition plate in correspondence; one detachable dust removal cloth bag is connected between the through holes corresponding in the upper and lower positions, and is used for filtering metal dust. The connecting rod drives the arc-shaped baffle to rotate to form a closed cylinder to wrap the side of the dust removal cloth bag, metal dust adhered to the inner wall of the cloth bag is removed through back blowing of the air blowing port, and therefore the collection efficiency of the metal dust is improved.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas treatment, and more particularly to an environmentally friendly smelting exhaust gas treatment device. Background Technology

[0002] Metallurgical exhaust gas refers to the waste gas generated during the metal smelting process. The waste gas contains harmful components such as sulfur dioxide, carbon monoxide, and nitrogen oxides, as well as metal dust. Direct emission will pollute the environment. People usually use bag filters to pre-treat the exhaust gas, thereby recovering the metal dust in the exhaust gas, and then further treating the harmful components in the exhaust gas.

[0003] A Chinese patent with publication number CN119524540A discloses a bag filter dust collector for easy cleaning in metallurgical casting. This patent filters dust in exhaust gas by using the outer surface of the filter bags and blows off the dust from the outer surface of the bags using movable nozzles inside the bags. However, when filtering and recovering metal dust in the exhaust gas, the metal dust filtered on the outer surface of the bags is blown away by the incoming exhaust gas, causing the filtered metal dust to disperse and fill the entire interior of the equipment, thus increasing the difficulty of subsequent metal dust recovery. Furthermore, the existing technology lacks real-time monitoring of the filter bag's condition, making it impossible to detect damage to a single bag in a timely manner, which can easily affect the stable operation of the overall equipment.

[0004] In summary, this application proposes an environmentally friendly smelting tail gas treatment device to improve the aforementioned technical problems. Summary of the Invention

[0005] To overcome the drawback that the metal dust filtered on the outer surface of the filter bag can be blown away by the incoming exhaust gas, causing the filtered metal dust to disperse and fill the entire interior of the equipment, thus increasing the difficulty of subsequent metal dust recovery, this invention provides an environmentally friendly smelting tail gas treatment device.

[0006] The technical solution is as follows: an environmentally friendly smelting tail gas treatment device, comprising an outer shell, an inlet pipe, and an outlet pipe; the outer shell is connected to the inlet pipe; the outer shell is connected to the outlet pipe; it also includes an upper partition, a lower partition, a dust collector bag, a sealing unit, and a collection hopper; the upper partition is fixedly connected inside the outer shell; the lower partition is fixedly connected inside the outer shell, and the lower partition is located below the upper partition; the upper and lower partitions have corresponding through holes, and each corresponding through hole is connected to a detachable dust collector bag for filtering metal dust, and the dust collector bag is configured to be open at both ends; the outer shell is connected to several sealing units for sealing the upper and lower openings of the dust collector bag; the outer shell is slidably connected to a collection hopper for collecting metal dust, and the collection hopper is located below the lower partition.

[0007] As a further preferred embodiment, the sealing unit includes a drive motor, a rotating rod, an upper sliding rod, a cover plate, a lower sliding rod, and a base plate; the drive motor is fixedly connected to the outer casing; the rotating rod is rotatably connected to the outer casing, the output shaft of the drive motor is fixedly connected to the corresponding rotating rod, and the rotating rod is located at the center of the corresponding dust collector bag; each rotating rod has a spiral section at its upper and lower ends; several upper sliding rods are fixedly connected to the upper side of the upper partition plate; each spiral section at the upper end of each rotating rod is rotatably connected to a cover plate, and the cover plate is slidably connected to the corresponding upper sliding rod; several lower sliding rods are fixedly connected to the lower side of the lower partition plate; each spiral section at the lower end of each rotating rod is rotatably connected to a base plate, and the base plate is slidably connected to the corresponding lower sliding rod.

[0008] As a further preferred embodiment, it also includes an air supply pipe, an annular pipe, a flexible hose, a connecting rod, an arc-shaped baffle, and a drive unit; the air supply pipe is fixedly connected to the bottom of the lower partition, and the air supply pipe passes through the outer shell and connects to an external pump; an annular pipe is fixedly connected to each through hole of the lower partition, and the annular pipe is connected to the air supply pipe, and the annular pipe is equipped with an electrically controlled valve; several connecting rods arranged in a circular array are rotatably connected around the through hole of each lower partition, and the upper end of the connecting rod is rotatably connected to the upper partition; an arc-shaped baffle is fixedly connected to each connecting rod, and the rotation of the connecting rod and the arc-shaped baffle forms a cylinder that surrounds the dust collector bag; several drive units are connected to the bottom of the lower partition, and the drive units are connected to the connecting rods to drive the connecting rods to rotate; the connecting rods are designed as hollow structures; several flexible hoses are connected to each annular pipe, and the flexible hoses are connected to the interior of the corresponding connecting rod; several air blowing ports are opened on each connecting rod.

[0009] As a further preferred embodiment, the drive unit includes an annular electric slider, a gear ring, and a gear; the bottom of the lower partition is slidably connected to the annular electric slider via an annular slide rail; the annular electric slider is fixedly connected to the gear ring; each connecting rod is fixedly connected to a gear, and the gear meshes with the gear ring.

[0010] As a further preferred option, the air inlet is set at an angle downwards.

[0011] As a further preferred embodiment, it also includes elastic sheets and striking rods; each connecting rod is fixedly connected to several elastic sheets; each elastic sheet is fixedly connected to a striking rod.

[0012] As a further preferred embodiment, it also includes a connecting plate, a support plate, a micro motor, and a pressing plate; several connecting plates arranged in a circular array are fixedly connected to the upper and lower sides of the rotating rod; each pair of corresponding upper and lower connecting plates are rotatably connected to a support plate, and the support plate is in contact with the inner wall of the dust collector bag; a micro motor is fixedly connected to each connecting plate on the upper side, and the output shaft of the micro motor is fixedly connected to the support plate; a pressing plate is fixedly connected to each support plate.

[0013] As a further preferred option, the side of the base plate is set as a conical surface that is higher in the middle and lower around the edges.

[0014] As a further preferred option, it also includes a pressure detector; a pressure detector is fixedly connected to each through hole of each lower partition, and the pressure detector is located between the dust collector bag and the connecting rod.

[0015] As a further preferred option, the upper end of the sliding rod is provided with a threaded part, and the sliding rod is threadedly connected to the lower partition plate through the threaded part.

[0016] Beneficial effects:

[0017] The connecting rod drives the arc-shaped baffle to rotate, forming a closed cylinder that wraps around the side of the dust collector bag. Then, the air blowing port blows back to remove the metal dust adhering to the inner wall of the bag, thereby improving the collection efficiency of metal dust. The extrusion plate squeezes and expands the dust collector bag, causing the filter pores of the dust collector bag to expand, so that the air blowing port can blow out the metal dust embedded inside the dust collector bag, thereby improving the cleaning effect of the dust collector bag.

[0018] By periodically detecting the air pressure between the cylinder formed by the rotating arc baffle and the outer surface of the dust collector bag using an air pressure detector, and comparing it with the initial air pressure value, the condition of the dust collector bag can be checked regularly. This prevents the operation from being affected by the failure to detect individual damaged bags in time, which could easily affect the stable operation of the overall equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the environmentally friendly smelting tail gas treatment equipment disclosed in this invention.

[0020] Figure 2 This is a side view of the environmentally friendly smelting tail gas treatment equipment disclosed in this invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the outer shell disclosed in this invention;

[0022] Figure 4 This is a schematic diagram of the structure of the dust collector bag, drive motor, rotating rod, upper sliding rod and cover plate assembly disclosed in this invention;

[0023] Figure 5 This is a schematic diagram of the structure of the lower partition, dust collector bag, sliding rod and bottom plate assembly disclosed in this invention;

[0024] Figure 6 This is a schematic diagram of the structure of the drive motor, rotating rod, cover plate, connecting plate, support plate, micro motor and extrusion plate assembly disclosed in this invention;

[0025] Figure 7 This is a schematic diagram of the structure of the combination of rotating rod, sliding rod, base plate, connecting plate, support plate and extrusion plate disclosed in this invention;

[0026] Figure 8 This is a schematic diagram of the structure of the lower partition, gas transmission pipe and annular pipe assembly disclosed in this invention;

[0027] Figure 9 This is a schematic diagram of the structure of the driving unit disclosed in this invention;

[0028] Figure 10 This is a schematic diagram of the structure of the connecting rod, arc-shaped baffle, elastic sheet and striking rod assembly disclosed in this invention;

[0029] Figure 11 This is a diagram showing the state of the arc-shaped baffle rotating and surrounding the dust collector bag as disclosed in this invention.

[0030] The components are: 1-outer shell, 2-inlet pipe, 3-outlet pipe, 4-upper partition, 5-lower partition, 6-dust collector bag, 7-drive motor, 8-rotating rod, 9-upper sliding rod, 10-cover plate, 11-lower sliding rod, 12-bottom plate, 13-collection hopper, 101-connecting plate, 102-support plate, 103-micro motor, 104-squeezing plate, 111-air delivery pipe, 112-ring pipe, 113-hose, 114-connecting rod, 115-arc baffle, 116-elastic sheet, 117-tapping rod, 121-ring electric slider, 122-tooth ring, 123-gear, 201-air pressure detector, 1101-threaded part, 11401-air blowing port. Detailed Implementation

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0032] Example 1: An environmentally friendly smelting tail gas treatment device, referring to... Figures 1-11 As shown, it includes an outer shell 1, an air inlet pipe 2, and an air outlet pipe 3; the outer shell 1 is connected to the air inlet pipe 2 and the air outlet pipe 3;

[0033] It also includes an upper partition 4, a lower partition 5, a dust collector bag 6, a sealing unit, and a collection hopper 13; the upper partition 4 is fixedly connected inside the outer shell 1; the lower partition 5 is fixedly connected inside the outer shell 1, and the lower partition 5 is located below the upper partition 4; the upper partition 4 and the lower partition 5 each have several vertically aligned through holes, and a dust collector bag 6 is bolted between each vertically aligned through hole of the upper partition 4 and the through hole of the lower partition 5, and the dust collector bag 6 is set to be open at both ends; the outer shell 1 is connected to several sealing units; the outer shell 1 is slidably connected to the collection hopper 13, and the collection hopper 13 is located below the lower partition 5.

[0034] The sealing unit includes a drive motor 7, a rotating rod 8, an upper sliding rod 9, a cover plate 10, a lower sliding rod 11, and a base plate 12. The drive motor 7 is fixedly connected to the outer shell 1. The rotating rod 8 is rotatably connected to the outer shell 1, and the output shaft of the drive motor 7 is fixedly connected to the corresponding rotating rod 8. The rotating rod 8 is located at the center of the corresponding dust collector bag 6. Each rotating rod 8 has a spiral part at its upper and lower ends. Several upper sliding rods 9 are fixedly connected to the upper side of the upper partition 4. Each spiral part at the upper end of each rotating rod 8 is rotatably connected to a cover plate 10, and the cover plate 10 is slidably connected to the corresponding upper sliding rod 9. Several lower sliding rods 11 are fixedly connected to the lower side of the lower partition 5. Each spiral part at the lower end of each rotating rod 8 is rotatably connected to a base plate 12, and the base plate 12 is slidably connected to the corresponding lower sliding rod 11.

[0035] It also includes an air supply pipe 111, an annular pipe 112, a flexible hose 113, a connecting rod 114, an arc-shaped baffle 115, and a drive unit; the bottom of the lower partition 5 is fixedly connected to the air supply pipe 111, and the air supply pipe 111 passes through the outer shell 1 and connects to an external pump; each lower partition 5 has an annular pipe 112 fixedly connected to its through hole, and the annular pipe 112 communicates with the air supply pipe 111, and the annular pipe 112 is equipped with an electrically controlled valve; each lower partition 5 has eight connecting rods 114 rotatably connected around its through hole in a circular array, and the upper end of the connecting rods 114 is rotatably connected to the upper partition 4. Each connecting rod 114 is fixedly connected to an arc-shaped baffle 115. The connecting rod 114 and the arc-shaped baffle 115 rotate to form a cylinder that surrounds the dust collector bag 6. Several driving units are connected to the bottom of the lower partition 5. The driving units are connected to the connecting rod 114 and are used to drive the connecting rod 114 to rotate. The connecting rod 114 is designed as a hollow structure. Each annular tube 112 is connected to several flexible hoses 113, and the flexible hoses 113 are connected to the interior of the corresponding connecting rod 114. Each connecting rod 114 has several air blowing ports 11401.

[0036] The drive unit includes an annular electric slider 121, a toothed ring 122, and a gear 123; the bottom of the lower partition 5 is slidably connected to the annular electric slider 121 via an annular slide rail; the annular electric slider 121 is fixedly connected to the toothed ring 122; each connecting rod 114 is fixedly connected to a gear 123, and the gear 123 meshes with the toothed ring 122.

[0037] The air outlet 11401 is set at an angle downwards, so that while blowing out the dust adhering to the inner wall of the dust collector bag 6, it can guide the dust downwards and fall out of the dust collector bag 6.

[0038] It also includes elastic sheets 116 and striking rods 117; each connecting rod 114 is fixedly connected to several elastic sheets 116; each elastic sheet 116 is fixedly connected to a striking rod 117.

[0039] It also includes a connecting plate 101, a support plate 102, a micro motor 103, and a pressing plate 104; four connecting plates 101 arranged in a circular array are fixedly connected to the upper and lower sides of the rotating rod 8; each pair of corresponding upper and lower connecting plates 101 are rotatably connected to a support plate 102, and the support plate 102 is in contact with the inner wall of the dust collector bag 6; each connecting plate 101 located on the upper side is fixedly connected to a micro motor 103, and the output shaft of the micro motor 103 is fixedly connected to the support plate 102; each support plate 102 is fixedly connected to a pressing plate 104.

[0040] The upper side of the base plate 12 is designed as a cone-shaped surface that is high in the middle and low around the edges, so that metal dust can slide down and be collected in the collection hopper 13 below.

[0041] In existing methods of filtering metal dust from metallurgical exhaust gas using the outer surface of a filter bag, the filtered metal dust is agitated by the continuously flowing exhaust gas, causing it to disperse and fill the entire interior of the equipment. This increases the difficulty of subsequent metal dust recovery and necessitates shutting down the equipment for cleaning, impacting overall exhaust gas treatment efficiency. To address these issues, this invention proposes an environmentally friendly smelting exhaust gas treatment device, the specific operation of which is as follows:

[0042] Metallurgical exhaust gas is introduced into the space above the upper partition 4 inside the outer casing 1 through the inlet pipe 2. During normal operation, the cover plate 10 is positioned above the upper opening of the dust collector bag 6, and the bottom plate 12 seals the lower opening of the dust collector bag 6. The exhaust gas enters the dust collector bag 6 through the upper opening, filters metal dust, and then exits from the side of the dust collector bag 6. It is then introduced into subsequent treatment equipment through the outlet pipe 3 for purification before being discharged to the outside. This avoids direct discharge of metallurgical exhaust gas into the environment. This causes pollution to the external environment. At this time, the metal dust filtered by the dust collector bag 6 is collected inside the dust collector bag 6. After the dust collector bag 6 has worked for a set time, a certain amount of metal dust has been collected inside the dust collector bag 6. Then, the drive motor 7 is controlled to drive the rotating rod 8 to rotate. The rotating rod 8 drives the cover plate 10 to move down along the upper sliding rod 9 through the spiral part, sealing the upper opening of the dust collector bag 6 and stopping the exhaust gas from entering the dust collector bag 6. At the same time, the rotating rod 8 drives the bottom plate 12 to move down along the lower sliding rod 11, opening the lower opening of the dust collector bag 6, thereby allowing the dust collector bag 6 to be exposed to air. The collected metal dust falls out and is eventually collected in the collection hopper 13 below. The upper side of the bottom plate 12 is designed as a conical surface with a higher center and lower edges to facilitate the metal dust sliding down the upper side of the bottom plate 12 and collecting in the collection hopper 13 below. After the metal dust in the dust collector bag 6 is completely discharged, the drive motor 7 drives the rotating rod 8 to reverse, causing the cover plate 10 and the bottom plate 12 to move upward and reset, reopening the upper opening of the dust collector bag 6 and sealing the lower opening, continuing to filter the exhaust gas. In this way, the metal dust filtered by the dust collector bag 6 is collected. Inside the dust collector bag 6, measures are taken to prevent the incoming exhaust gas from blowing away the metal dust filtered by the bag, causing it to disperse and fill the entire equipment, increasing the difficulty of subsequent metal dust recovery. Furthermore, the cleaning times of each dust collector bag 6 are staggered, so that while one bag is being cleaned, the others can still filter the exhaust gas normally, avoiding the need to shut down the equipment for cleaning when recovering metal dust, which would affect the overall exhaust gas treatment efficiency. The collection hopper 13 can then be manually removed for metal dust recovery.

[0043] Meanwhile, considering that under long-term use, some metal dust will be embedded and adhered to the inner wall of the dust collector bag 6 under the influence of exhaust gas, which not only prevents the filtered metal dust from being fully collected, but also hinders the flow of exhaust gas and reduces the overall efficiency of exhaust gas treatment; therefore, after the cover plate 10 moves down to seal the upper opening of the dust collector bag 6 and the bottom plate 12 moves down to open the lower opening of the dust collector bag 6, the annular electric slider 121 is then controlled to drive the gear ring 122 to rotate. The gear ring 122 drives the connecting rod 114 and the arc-shaped baffle 115 to rotate through the gear 123 until the arc-shaped baffle 115 contacts the adjacent connecting rod 114, such as Figure 11As shown, the connecting rod 114 and the arc-shaped baffle 115 rotate to form a closed cylinder, which wraps and isolates the side of the dust collector bag 6. Then, an external pump is controlled to sequentially introduce gas from the air supply pipe 111, the annular pipe 112, and the hose 113 into the connecting rod 114, and blow it out from the air blowing port 11401. The gas is blown between the cylinder formed by the arc-shaped baffle 115 and the dust collector bag 6, causing the gas to blow from the outside of the dust collector bag 6 to the inside. By blowing the gas from the outside to the inside, the metal dust attached to the inner wall of the dust collector bag 6 is blown off, thereby improving the collection efficiency of the metal dust. The air blowing port 11401 is set to be inclined downwards to blow the metal dust. While the dust is blown out, it can also cause the metal dust inside the dust collector bag 6 to fall downwards, accelerating the cleaning and collection efficiency of the metal dust. Furthermore, during the back-blowing cleaning of the dust collector bag 6 by the air outlet 11401, the micro motor 103 is controlled to drive the support plate 102 and the extrusion plate 104 to rotate. When the extrusion plate 104 rotates and comes into contact with the dust collector bag 6, the extrusion plate 104 squeezes and expands the dust collector bag 6, causing the filter pores of the dust collector bag 6 to expand, so that the air outlet 11401 can back-blow out the metal dust embedded inside the dust collector bag 6, improving the cleaning effect of the dust collector bag 6 and thus increasing the service life of the dust collector bag 6.

[0044] Furthermore, during the operation of the dust collector bag 6, the annular electric slider 121 is periodically controlled to drive the connecting rod 114 to reciprocate. The connecting rod 114 drives the elastic sheet 116 and the striking rod 117 to reciprocate and strike the dust collector bag 6. During the operation of the dust collector bag 6, the striking rod 117 can periodically strike and beat the side wall of the dust collector bag 6, shaking off the metal dust filtered on the side wall of the dust collector bag 6 in time. This prevents the metal dust remaining on the side wall of the dust collector bag 6 from obstructing the normal flow of exhaust gas during the operation of the dust collector bag 6, thereby ensuring the overall exhaust gas treatment efficiency.

[0045] Example 2: Based on Example 1, referring to... Figure 7 , Figure 10 and Figure 11 As shown, it also includes an air pressure detector 201; an air pressure detector 201 is fixedly connected to the through hole of each lower partition 5, and the air pressure detector 201 is located between the dust collector bag 6 and the connecting rod 114.

[0046] The upper end of the sliding rod 11 is provided with a threaded part 1101. The sliding rod 11 is threadedly connected to the lower partition plate 5 through the threaded part 1101. The sliding rod 11 can be removed by rotating it, and then the bottom plate 12 can be taken out to facilitate manual replacement of the dust collector bag 6.

[0047] Based on the above embodiment 1, furthermore, when using filter bags to filter exhaust gas, the filter bags inevitably experience clogging, aging, and wear over long-term use. Existing technologies lack real-time monitoring of the filter bag's condition; when a filter bag is damaged, it cannot be detected in time, easily affecting the stable operation of the overall equipment. Furthermore, replacing the filter bag requires stopping the machine, affecting continuous operation and reducing the overall exhaust gas treatment efficiency. Therefore, a pressure detector 201 is installed between the dust collector bag 6 and the connecting rod 114. After the dust bag 6 is installed, the control cover plate 10 moves down to seal the upper opening of the bag, and the bottom plate 12 moves down to open the lower opening of the dust bag 6. The control also controls the annular electric slider 121 to rotate the connecting rod 114 and the arc-shaped baffle 115 to form a closed cylinder, surrounding the side of the dust bag 6. At this time, the air pressure detector 201 is positioned between the cylinder formed by the rotation of the arc-shaped baffle 115 and the outer surface of the dust bag 6. The control also controls the air blowing port 11401 to blow air at a specific volume exceeding the rated filtration capacity of the bag, recording the initial air pressure value measured by the air pressure detector 201. Subsequently, the control also controls the cover plate 10... The base plate 12 is reset to its normal working state; then the dust collector bag 6 works to filter the exhaust gas. When the dust collector bag 6 is used for a set time to clean and recover metal dust, the same operation is performed. The arc-shaped baffle 115 is rotated to form a cylinder that surrounds the dust collector bag 6, and the dust collector bag 6 is back-blown cleaned through the air blowing port 11401. After cleaning, air is blown again with a specific air volume for detection. At this time, the air pressure detector 201 detects the air pressure between the formed cylinder and the outer surface of the dust collector bag 6, and compares it with the initial air pressure value to determine the dust collector bag. The usage of filter bag 6 is checked. When the detected air pressure is higher than the initial air pressure value, it indicates that the filter bag 6 is blocked. When the detected air pressure is lower than the initial air pressure value, it indicates that the filter bag 6 is damaged. In this way, the air pressure detector 201 periodically detects the air pressure between the cylinder formed by the rotation of the arc baffle 115 and the outer surface of the filter bag 6, and compares it with the initial air pressure value. This allows for regular inspection of the usage of the filter bag 6, preventing the failure to detect damage to a filter bag in time, which could easily affect the stable operation of the overall equipment.

[0048] Furthermore, when a blockage or damage is detected in the dust collector bag 6, the closed cylinder formed by the arc-shaped baffle 115, in conjunction with the cover plate 10, can isolate the damaged dust collector bag 6 from the circulating exhaust gas. Subsequently, the collection hopper 13 is fully pulled out, and then the sliding rod 11 is manually rotated and removed. Next, the bottom plate 12 is removed, and then the damaged dust collector bag 6 is manually disassembled and removed from top to bottom. Finally, a new dust collector bag 6 is manually installed between the upper partition plate 4 and the lower partition plate 5 from bottom to top, thus realizing the online replacement of the dust collector bag 6.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An environment-friendly smelting tail gas treatment device, comprising a shell (1), an air inlet pipe (2) and an air outlet pipe (3); the shell (1) is communicated with the air inlet pipe (2) and the air outlet pipe (3); characterized in that, It also includes the upper partition (4), the lower partition (5), the dust cloth bag (6), the blocking unit and the collection bucket (13); the upper partition (4) is fixedly connected inside the shell (1); the lower partition (5) is fixedly connected inside the shell (1), and the lower partition (5) is located below the upper partition (4); the upper partition (4) and the lower partition (5) are each provided with a plurality of upper and lower aligned through holes, and the upper and lower aligned through holes are detachably connected with the dust cloth bag (6) for filtering metal dust, and the dust cloth bag (6) is provided in an upper and lower opening shape; the shell (1) is connected with a plurality of blocking units for blocking the upper end opening and the lower end opening of the dust cloth bag (6); the shell (1) is slidably connected with the collection bucket (13) for collecting metal dust, and the collection bucket (13) is located below the lower partition (5); It also includes the gas delivery pipe (111), the annular pipe (112), the hose (113), the connecting rod (114), the arc-shaped baffle (115) and the driving unit; the lower partition (5) is fixedly connected with the gas delivery pipe (111) at the bottom, and the gas delivery pipe (111) penetrates the shell (1) and is connected with an external pump; each lower partition (5) is fixedly connected with an annular pipe (112) at the through hole, and the annular pipe (112) is in communication with the gas delivery pipe (111), and the annular pipe (112) is provided with an electric control valve; each lower partition (5) is rotatably connected with a plurality of connecting rods (114) arranged in an annular array around the through hole, and the upper end of the connecting rod (114) is rotatably connected with the upper partition (4); each connecting rod (114) is fixedly connected with an arc-shaped baffle (115), and the arc-shaped baffle (115) is driven to rotate by the connecting rod (114) to form a closed cylinder to surround the dust cloth bag (6); the lower partition (5) is connected with a plurality of driving units at the bottom, the driving units are connected with the connecting rods (114), and the driving units are used to drive the connecting rods (114) to rotate; the connecting rod (114) is provided in a hollow structure; each annular pipe (112) is communicated with a plurality of hoses (113), and the hoses (113) are in communication with the corresponding connecting rods (114) inside; each connecting rod (114) is provided with a plurality of air blowing ports (11401).

2. The environment-friendly based smelting off-gas treatment device according to claim 1, characterized in that, The blocking unit includes the driving motor (7), the rotating rod (8), the upper sliding rod (9), the cover plate (10), the lower sliding rod (11) and the bottom plate (12); the shell (1) is fixedly connected with the driving motor (7); the shell (1) is rotatably connected with the rotating rod (8), the output shaft of the driving motor (7) is fixedly connected with the corresponding rotating rod (8), and the rotating rod (8) is located at the center of the corresponding dust cloth bag (6); the upper end and the lower end of each rotating rod (8) are provided with a spiral part; the upper side of the upper partition (4) is fixedly connected with a plurality of upper sliding rods (9); the spiral part of the upper end of each rotating rod (8) is rotatably connected with a cover plate (10), and the cover plate (10) is slidably connected with the corresponding upper sliding rod (9); the lower side of the lower partition (5) is fixedly connected with a plurality of lower sliding rods (11); the spiral part of the lower end of each rotating rod (8) is rotatably connected with a bottom plate (12), and the bottom plate (12) is slidably connected with the corresponding lower sliding rod (11).

3. The environment-friendly based smelting off-gas treatment device according to claim 2, characterized in that, The driving unit comprises a ring-shaped electric sliding block (121), a gear ring (122) and a gear (123); the bottom of the lower partition plate (5) is slidably connected with the ring-shaped electric sliding block (121) through a ring-shaped sliding rail; the ring-shaped electric sliding block (121) is fixedly connected with the gear ring (122); each connecting rod (114) is fixedly connected with a gear (123), and the gear (123) is engaged with the gear ring (122).

4. The environment-friendly based smelting tail gas treatment device according to any one of claims 2-3, characterized in that, The axis direction of the air blowing port (11401) is inclined downward.

5. The environmentally friendly smelting off-gas treatment device according to claim 1, characterized in that, Further comprising elastic sheets (116) and knocking rods (117); each connecting rod (114) is fixedly connected with a plurality of elastic sheets (116); each elastic sheet (116) is fixedly connected with a knocking rod (117).

6. The environment-friendly based smelting off-gas treatment device according to claim 2, characterized in that, Further comprising connecting plates (101), support plates (102), micro motors (103) and extrusion plates (104); the upper side and the lower side of the rotating rod (8) are each fixedly connected with a plurality of connecting plates (101) arranged in a ring shape; each of the two connecting plates (101) corresponding to each other is rotatably connected with a support plate (102), and the support plate (102) is in contact with the inner wall of the dust removal cloth bag (6); the connecting plate (101) located on the upper side is fixedly connected with a micro motor (103), and the output shaft of the micro motor (103) is fixedly connected with the support plate (102); each support plate (102) is fixedly connected with an extrusion plate (104).

7. The environmentally friendly smelting off-gas treatment apparatus according to claim 6, characterized in that, The upper side of the bottom plate (12) is provided as a tapered surface with the middle being high and the periphery being low.

8. The environmentally friendly smelting off-gas treatment device according to claim 1, characterized in that, Further comprising air pressure detectors (201); each lower partition plate (5) is fixedly connected with an air pressure detector (201) at the through hole, and the air pressure detector (201) is located between the dust removal cloth bag (6) and the connecting rod (114).

9. The environmentally friendly smelting off-gas treatment apparatus according to claim 8, characterized in that, The lower end of the lower sliding rod (11) is provided with a threaded portion (1101), and the lower sliding rod (11) is threadedly connected with the lower partition plate (5) through the threaded portion (1101).

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