A zinc ash filtering device inside a furnace nose cavity

Abstract

The present invention relates to the field of dust removal technology, and specifically to a zinc ash filtering device inside a furnace nose cavity, comprising a shell, a partition, and a cloth bag; the partition is horizontally arranged inside the shell and can move up and down inside the shell; a fixing frame is arranged inside the cloth bag, and the fixing frame is fixed to the partition and can be retracted in the vertical direction; one end of the cloth bag is open and the other end is blocked, and the open end of the cloth bag is fixed to the fixing frame; a support ring is arranged inside the blocked end of the cloth bag, the support ring is connected to the fixing frame, and a blowing hole is opened at the bottom. By making the blocked end of the cloth bag turn inward and move upward from the inside of the cloth bag, the working shape of the cloth bag is changed, the utilization rate of the cloth bag is improved, and air is blown downward inside the cloth bag during the process of changing the shape of the cloth bag, so as to promote the zinc ash to fall, and the zinc ash falls from the inside of the cloth bag after the cloth bag is turned inward, reducing the amount of zinc ash falling to other cloth bags during the cleaning process, and improving the zinc ash collection efficiency and the dust removal efficiency of the cloth bag.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal, and in particular to a zinc ash filtering device inside a furnace nose cavity. Background Art

[0002] The furnace nose is an important equipment on the hot-dip galvanizing production line. It is used to connect the annealing furnace and the zinc pot to ensure that the strip can smoothly enter the zinc pot for galvanizing after annealing. During use, the zinc dust condensed from the zinc vapor inside it will gradually increase, and when it falls on the surface of the strip, it will affect the galvanizing quality of the strip. By extracting the gas in the furnace nose for cooling and filtering, the zinc vapor in the furnace nose can be extracted in time to reduce the residual zinc ash in the furnace nose cavity. After the extracted zinc vapor is cooled and filtered, the zinc ash can be collected for easy recycling.

[0003] In the prior art, a bag dust collector is usually used to collect zinc ash. After a certain period of use, the bags need to be shaken and cleaned to ensure their filtering effect. However, during the cleaning process, the shaken dust is easy to adhere to adjacent bags, affecting the cleaning effect. Summary of the invention

[0004] The invention provides a zinc ash filtering device inside a furnace nose cavity, so as to solve the problem that the cleaning effect of a cloth bag used for collecting zinc ash in the prior art is poor.

[0005] The zinc ash filtering device inside the furnace nose cavity of the present invention adopts the following technical solution:

[0006] A zinc ash filtering device inside a furnace nose cavity comprises an outer shell, a partition, and a cloth bag; the partition is horizontally arranged inside the outer shell, and divides the inside of the outer shell into an air outlet chamber located at the top and an air inlet chamber located at the bottom; the partition can move up and down in the outer shell; a fixing frame is arranged inside the cloth bag, and the upper end of the fixing frame is fixed to the partition and can be retracted in the vertical direction; one end of the cloth bag is open and faces upward and is connected to the air outlet chamber, and the other end is blocked, and one end of the opening of the cloth bag is fixed to the fixing frame; a support ring is arranged inside the blocked end of the cloth bag, the support ring is located in the cloth bag and connected to the fixing frame, and a blowing hole is opened at the bottom of the support ring, and a second one-way valve allowing gas to flow out of the support ring is arranged in the blowing hole; an elastic member is installed on the fixing frame, and the elastic member is elastically mounted on the fixing frame. The flexible member is vertically arranged and its two ends are respectively connected to the fixing frame and the support ring, and causes the fixing frame to extend in the vertical direction, thereby causing one end of the cloth bag opening to be located above and the blocked end to be located below; a horizontally extending support rod is installed in the outer shell, and the support rod is located above the partition; the part of the blocked end of the cloth bag located at the inner circle of the support ring is connected to a pull rope, the other end of the pull rope extends from one end of the cloth bag opening and is then wrapped around the upper side of the support rod and connected to the partition, and the length of the pull rope is fixed; a gas chamber is arranged in the fixing frame, one end of the gas chamber is connected to the blowing hole, and the other end is connected to the air outlet chamber, and the end connected to the air outlet chamber is installed with a first one-way valve allowing gas to enter the gas chamber, and the gas chamber is compressed when the partition moves downward.

[0007] Optionally, a motor is mounted on the partition, the output shaft of the motor extends horizontally and is coaxially connected to a transmission rod, and the transmission rod is in frictional contact with the inner wall of the housing or is driven by gear rack meshing.

[0008] Optionally, the fixed frame includes a fixing ring and a telescopic sleeve, the fixing ring is fixedly connected to one end of the cloth bag opening, and the fixing ring is fixed to the partition; the telescopic sleeve is vertically arranged, and the upper end is connected to the fixing ring, and the lower end is connected to the support ring, and the interior of the telescopic sleeve is the gas chamber; the upper end of the telescopic sleeve passes through the fixing ring and is connected to the air outlet chamber, and the first one-way valve is arranged at one end of the telescopic sleeve that is connected to the air outlet chamber.

[0009] Optionally, the elastic member is a spring, which is sleeved on the telescopic sleeve rod and fits with the inner circle of the cloth bag, and two ends of the spring are respectively connected to the fixing ring and the supporting ring.

[0010] Optionally, the bottom of the support ring is a curved surface.

[0011] Optionally, the shell is provided with an air inlet communicating with the air inlet chamber and an air outlet communicating with the air outlet chamber.

[0012] Optionally, there are multiple cloth bags, which are spaced apart on the partition; there are multiple corresponding fixing frames, elastic members, support rings, pull ropes and support rods, and the multiple support rods are distributed in parallel and located in the same horizontal plane. The part of one end of each cloth bag that is sealed and located in the support ring is connected to the partition through a pull rope.

[0013] Optionally, a conical collecting hopper is provided at the bottom of the shell, with the large end of the collecting hopper facing upward and connected to the air inlet chamber, for collecting zinc ash dropped from the cloth bag.

[0014] Optionally, a zinc ash filtering device inside a furnace nose cavity also includes an air outlet component, the air outlet component includes an air outlet pipe, an exhaust pipe and a blower, one end of the air outlet pipe is connected to the air outlet chamber of the outer shell, and the other end is connected to the blower; the exhaust pipe is vertically arranged, and the lower end is connected to the blower, and the blower causes the gas in the air outlet chamber to be discharged through the air outlet pipe and the exhaust pipe.

[0015] Optionally, a zinc ash filtering device inside a furnace nose cavity further includes a frame, a shell is fixed to the frame, and a platform for maintenance and a ladder for climbing to the platform are provided on the frame.

[0016] The beneficial effects of the present invention are as follows: in the initial state of the zinc ash filtering device inside the furnace nose cavity of the present invention, the pull rope and the elastic member work together to make the bag in a vertical state, with the open end at the top and the blocked end at the bottom. After the gas extracted from the furnace nose cavity cools down, it enters the air inlet chamber from the air inlet and then passes through the bag. After being filtered by the bag, it enters the air outlet chamber from the open end of the bag and is discharged from the air outlet. At this time, the bag is in an external filtering state. While the partition presses the elastic member downward, the pull rope will pull the middle of the blocked end of the bag from the inside of the bag to move upward to the upper side of the partition, so that the blocked end of the bag enters the air outlet chamber from the inside of the bag, and the outer layer of the bag is turned to the inside. Most of the gas in the air inlet chamber passes through the newly defined inner side of the blocked end of the bag and enters the air outlet chamber. At this time, the bag is in an internal filtering state. During the normal operation of the bag, the partition moves up and down, causing the bag to switch back and forth between the external filtering state and the internal filtering state, changing the position of the bag closest to the air outlet chamber, so that different positions of the bag are subject to a greater suction force from the gas on one side of the air outlet chamber. When the bag changes to different states, the suction force at a certain position of the bag changes continuously, which helps to drop impurities attached to the outside of the bag. It can be cleaned without stopping the machine, and the dust removal efficiency can be improved. Different positions of the bag can be effectively utilized, extending its service life.

[0017] Furthermore, during the downward movement of the partition, the gas in the squeezed gas chamber is discharged from the blowing hole, and the blowing hole blows air back to the part of the bag that is turned inward and moved upward through the support ring, causing the zinc ash attached to the outside of the bag to fall off, and the blowing hole is arranged at the bottom of the support ring, and the impurities that are recoiled will fall downward quickly, and are not easy to adhere to other bags or the inner wall of the outer shell, and are not easy to be carried by the flue gas and attach to the bag again, thereby improving the zinc ash collection efficiency.

[0018] Furthermore, when the partition moves up and down, the elastic member is compressed or stretched under its own elastic force, and moves relative to the inner side of the bag, further causing impurities attached to the outer side of the bag to fall off.

[0019] Furthermore, when the air intake is stopped, the partition is moved downward until the elastic member is compressed to near the limit, and the partition is moved up and down slightly at the current position. Since one end of the cloth bag is turned inward and moved upward at this time, the zinc ash attached to the outside of the cloth bag is turned to the inside. At this time, the partition moves up and down slightly, which can cause the zinc ash to fall from the inside of the cloth bag, and will not cause the zinc ash to escape over a large range in the air intake chamber, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a zinc ash filtering device inside a furnace nose cavity of the present invention;

[0022] Figure 2 It is a side view of the overall structure of an embodiment of a zinc ash filtering device inside a furnace nose cavity of the present invention;

[0023] Figure 3 for Figure 2 A schematic cross-section diagram along the AA axis, where the bag is in the initial state;

[0024] Figure 4 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0025] Figure 5 for Figure 3 The enlarged schematic diagram of the center C;

[0026] Figure 6 It is a schematic diagram of the state of the cloth bag during the downward movement of the partition in an embodiment of the zinc ash filtering device inside the furnace nose cavity of the present invention;

[0027] Figure 7 for Figure 6 The enlarged schematic diagram of point D in the middle;

[0028] Figure 8 It is a schematic diagram of an embodiment of a zinc ash filtering device inside a furnace nose cavity of the present invention, in which the partition moves downward until the bag is in an internal filtering state;

[0029] Fig. 9 for Figure 8 Enlarged schematic diagram of point E in the middle.

[0030] In the figure: 100, shell; 110, support rod; 120, collecting hopper; 130, air inlet; 140, air outlet; 200, partition; 210, motor; 211, transmission rod; 300, cloth bag; 310, fixing frame; 311, fixing ring; 312, telescopic sleeve; 313, gas chamber; 320, support ring; 321, blowing hole; 330, pull rope; 340, elastic member; 410, air outlet pipe; 420, exhaust pipe; 430, blower; 510, platform; 520, ladder. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments 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.

[0032] An embodiment of a zinc ash filtering device inside a furnace nose cavity of the present invention is as follows Figures 1 to 9 As shown, it includes a shell 100, a partition 200, and a cloth bag 300.

[0033] The partition 200 is horizontally arranged in the housing 100, and divides the interior of the housing 100 into an air outlet chamber located at the top and an air inlet chamber located at the bottom; and the housing 100 is provided with an air inlet 130 communicating with the air inlet chamber and an air outlet 140 communicating with the air outlet chamber. The partition 200 can move up and down in the housing 100.

[0034] A fixing frame 310 is provided inside the cloth bag 300, and the upper end of the fixing frame 310 is fixed to the partition 200 and is retractable in the vertical direction; one end of the cloth bag 300 is open and faces upward, and the open end is fixed to the fixing frame 310 and communicates with the air outlet chamber, the other end of the cloth bag 300 is blocked, and the interior of the cloth bag 300 is communicated with the air outlet chamber through its open end; the gas extracted from the furnace nose cavity is cooled and enters the air inlet chamber from the air inlet 130 and then passes through the cloth bag 300. After being filtered by the cloth bag 300, it enters the air outlet chamber from the open end of the cloth bag 300 and is finally discharged from the air outlet 140. A support ring 320 is provided inside the blocked end of the bag 300. The support ring 320 is located inside the bag 300 and connected to the fixing frame 310. A blowing hole 321 is provided at the bottom of the support ring 320. A second one-way valve is provided in the blowing hole 321 to allow gas to flow out from the support ring 320. The bottom of the support ring 320 is an arc surface to reduce friction and wear when the bag 300 passes through the lower side of the support ring 320. An elastic member 340 is installed on the fixing frame 310. The elastic member 340 is vertically arranged and the two ends are respectively connected to the fixing frame 310 and the support ring 320, and the fixing frame 310 is extended in the vertical direction, thereby causing the open end of the bag 300 to be located at the top and the blocked end to be located at the bottom. A horizontally extending support rod 110 is installed in the housing 100. The support rod 110 is located above the partition 200. The part of the blocked end of the cloth bag 300 located in the inner circle of the support ring 320 is connected with a drawstring 330, and the other end of the drawstring 330 extends from the open end of the cloth bag 300 and is wound from the upper side of the support rod 110 and connected to the partition 200, and the length of the drawstring 330 is fixed. A gas chamber 313 is arranged in the fixing frame 310, one end of the gas chamber 313 is connected to the blowing hole 321, and the other end is connected to the air outlet chamber, and the end connected to the air outlet chamber is installed with a first one-way valve allowing gas to enter the gas chamber 313, and the gas chamber 313 is compressed when the partition 200 moves downward.

[0035] In the initial state, since the pull rope 330 is passed around the upper side of the support rod 110, under the tension of the pull rope 330 and the elastic force of the elastic member 340, the cloth bag 300 is in a vertical state, with the open end at the top and the blocked end at the bottom, and the fixing frame 310 is in a maximum elongation state under the action of the elastic member 340. After the gas extracted from the furnace nose cavity is cooled, it enters the air inlet chamber from the air inlet 130 and then passes through the cloth bag 300. After being filtered by the cloth bag 300, it enters the air outlet chamber from the open end of the cloth bag 300 and is finally discharged from the air outlet 140. At this time, the cloth bag 300 is in an external filtering state. When it is necessary to clean the zinc ash accumulated on the outside of the bag 300, the partition 200 is moved downward. While the partition 200 squeezes the elastic member 340 downward, since the pull rope 330 is of fixed length and is connected to the partition 200 after passing around the support rod 110, the pull rope 330 will pull the middle part of the blocked end of the bag 300 from the inside of the bag 300 upward to the upper side of the partition 200. When the partition 200 moves downward until the elastic member 340 is compressed to the limit, the blocked end of the bag 300 enters the air outlet chamber from the inside of the bag 300, turning the outer layer of the bag 300 to the inside, and most of the gas in the air inlet chamber passes through the newly defined inner side of the blocked end of the bag 300 and enters the air outlet chamber. At this time, the bag 300 is in an internal filtering state. When the bag 300 is working, the closer the bag 300 is to the air outlet chamber, the greater the pressure of the gas sucked out by the air outlet chamber, and the easier it is for the gas to pass through, the easier it is for zinc ash to accumulate at this position of the bag 300 and be subjected to continuous pressure. By moving the partition 200 up and down, the blocked end of the bag 300 can be turned inward and enter the air outlet chamber, so that different positions of the bag 300 can be effectively utilized, and the position of the bag 300 subjected to the pressure of the gas sucked out by the air outlet chamber can be changed, thereby improving the dust removal efficiency of the bag 300 and extending the service life of the bag 300.

[0036] Furthermore, during the downward movement of the partition 200, the gas in the squeezed gas chamber 313 is discharged from the blowing hole 321, and the blowing hole 321 blows back the part of the cloth bag 300 that is turned inward and moved upward through the support ring 320, causing the zinc ash attached to the outside of the cloth bag 300 to fall off, and the blowing hole 321 is arranged at the bottom of the support ring 320, and the impurities that are rebounded will fall downward quickly, and are not easy to adhere to other cloth bags 300 or the inner wall of the outer shell 100, and are not easy to be carried by the smoke and attach to the cloth bag 300 again.

[0037] Furthermore, when the partition 200 moves up and down, the elastic member 340 is compressed or stretched under its own elastic force, and moves relative to the inner side of the bag 300, further causing the impurities attached to the outer side of the bag 300 to fall off.

[0038] Furthermore, when the partition 200 moves downward until the elastic member 340 is compressed to near the limit, the partition 200 can be moved up and down slightly at the current position. Since the sealed end of the cloth bag 300 is turned inward and moved upward at this time, the zinc ash attached to the outside of the cloth bag 300 is turned to the inside. At this time, the partition 200 moves up and down slightly, which can cause the zinc ash to fall from the inside of the cloth bag 300 and will not cause the zinc ash to escape over a large area in the air intake chamber, thereby improving the cleaning effect.

[0039] In this embodiment, a motor 210 is mounted on the partition 200, and the output shaft of the motor 210 extends horizontally and is coaxially connected to a transmission rod 211, and the transmission rod 211 is in frictional contact with the inner wall of the housing 100 or is driven by gear rack meshing. Preferably, the transmission rod 211 is driven by gear rack meshing with the inner wall of the housing 100, specifically, a vertically extending rack (not shown in the figure) is mounted on the inner wall of the housing 100, a gear (not shown in the figure) meshing with the rack is mounted on the transmission rod 211, and at least two motors 210 are provided, and there are at least two sets of corresponding gears and racks, and the transmission rod 211 is driven by gear rack meshing with the inner wall of the housing 100, which can improve the stability of the up and down movement of the partition 200 and prevent slipping.

[0040] In this embodiment, the fixing frame 310 includes a fixing ring 311 and a telescopic sleeve 312, the fixing ring 311 is fixedly connected to one end of the opening of the cloth bag 300, and the fixing ring 311 is fixed to the partition 200; the telescopic sleeve 312 is vertically arranged, and the upper end is connected to the fixing ring 311, and the lower end is connected to the support ring 320, and the interior of the telescopic sleeve 312 is the gas chamber 313; the upper end of the telescopic sleeve 312 passes through the fixing ring 311 and is connected to the air outlet chamber, and the first one-way valve is arranged at one end of the telescopic sleeve 312 that is connected to the air outlet chamber.

[0041] In this embodiment, the elastic member 340 is a spring, which is sleeved on the telescopic sleeve rod 312 and fits with the inner circle of the cloth bag 300 , and the two ends of the spring are respectively connected to the fixing ring 311 and the supporting ring 320 .

[0042] In this embodiment, there are multiple cloth bags 300, which are distributed at intervals on the partition 200; there are multiple corresponding fixing frames 310, elastic members 340, support rings 320, pull ropes 330 and support rods 110, and the multiple support rods 110 are distributed in parallel and located in the same horizontal plane. The part of the sealed end of each cloth bag 300 located in the support ring 320 is connected to the partition 200 through a pull rope 330.

[0043] In this embodiment, a conical collecting hopper 120 is provided at the bottom of the housing 100 , with the large end of the collecting hopper 120 facing upward and connected to the air inlet chamber, for collecting zinc ash dropped from the bag 300 .

[0044] In the present embodiment, a zinc ash filtering device inside a furnace nose cavity also includes an air outlet component, which includes an air outlet pipe 410, an exhaust pipe 420 and a blower 430. One end of the air outlet pipe 410 is connected to the air outlet chamber of the outer shell 100, and the other end is connected to the blower 430; the exhaust pipe 420 is vertically arranged, and the lower end is connected to the blower 430. The blower 430 causes the gas in the air outlet chamber to be discharged through the air outlet pipe 410 and the exhaust pipe 420. The gas discharged from the exhaust pipe 420 can be introduced into the air supply device of the furnace nose after heating or other operations to ensure the pressure balance inside the furnace nose cavity.

[0045] In this embodiment, a zinc ash filtering device inside a furnace nose cavity further includes a frame, a housing 100 is fixed to the frame, and a platform 510 for maintenance and a ladder 520 for climbing to the platform 510 are provided on the frame.

[0046] In the initial state of the zinc ash filtering device inside the furnace nose cavity of the present invention, since the pull rope 330 is bypassed from the upper side of the support rod 110, under the tension of the pull rope 330 and the elastic force of the elastic member 340, the cloth bag 300 is in a vertical state, with the open end at the top and the blocked end at the bottom, and the fixing frame 310 is in a maximum elongation state under the action of the elastic member 340. After the gas extracted from the furnace nose cavity is cooled, it enters the air inlet chamber from the air inlet 130 and then passes through the cloth bag 300. After being filtered by the cloth bag 300, it enters the air outlet chamber from the open end of the cloth bag 300 and is discharged from the air outlet 140. At this time, the cloth bag 300 is in an external filtering state. When it is necessary to clean the zinc ash accumulated on the outside of the bag 300, the partition 200 is moved downward. While the partition 200 squeezes the elastic member 340 downward, since the pull rope 330 is of fixed length and is connected to the partition 200 after passing around the support rod 110, the pull rope 330 will pull the middle part of the blocked end of the bag 300 from the inside of the bag 300 upward to the upper side of the partition 200. When the partition 200 moves downward until the elastic member 340 is compressed to the limit, the blocked end of the bag 300 enters the air outlet chamber from the inside of the bag 300, turning the outer layer of the bag 300 to the inside, and most of the gas in the air inlet chamber passes through the newly defined inner side of the blocked end of the bag 300 and enters the air outlet chamber. At this time, the bag 300 is in an internal filtering state.

[0047] During the normal operation of the cloth bag 300, the motor 210 rotates back and forth, and the partition 200 moves back and forth up and down through the cooperation of the transmission rod 211 and the inner wall of the shell 100, so that the cloth bag 300 switches back and forth between the external filtering state and the internal filtering state, and changes the position of the cloth bag 300 closest to the air outlet chamber, so that different positions of the cloth bag 300 are subjected to a greater suction force of the gas on one side of the air outlet chamber being sucked outward. When the cloth bag 300 changes to different states, the suction force at a certain position thereof changes continuously, which helps to drop impurities attached to its outside, so that it can be cleaned without stopping the machine, and the dust removal efficiency can be improved, and different positions of the cloth bag 300 can be effectively utilized, thereby extending its service life.

[0048] In addition, during the downward movement of the partition 200, the gas in the squeezed gas chamber 313 is discharged from the blowing hole 321, and the blowing hole 321 blows back the part of the cloth bag 300 that is turned inward and moved upward through the support ring 320, so that the zinc ash attached to the outside of the cloth bag 300 falls off, and the blowing hole 321 is set at the bottom of the support ring 320, and the impurities that are flushed down will fall down quickly, and are not easy to adhere to other cloth bags 300 or the inner wall of the shell 100, and are not easy to be carried by the smoke and attached to the cloth bag 300 again. At the same time, during the upward and downward movement of the partition 200, the elastic member 340 is compressed or stretched under its own elastic force, and moves relative to the inner side of the cloth bag 300, further causing the impurities attached to the outside of the cloth bag 300 to fall off.

[0049] When the air intake is stopped, the partition 200 is moved downward until the elastic member 340 is compressed to near the limit, and the partition 200 is moved up and down slightly at the current position. Since the blocked end of the cloth bag 300 is turned inward and moved upward at this time, the zinc ash attached to the outside of the cloth bag 300 is turned to the inside. At this time, the partition 200 moves up and down slightly, which can cause the zinc ash to fall from the inside of the cloth bag 300, and will not cause the zinc ash to escape over a large range in the air intake chamber, thereby improving the cleaning effect.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A zinc ash filtering device inside a furnace nose cavity, characterized in that: Including shell, partition, cloth bag; The partition is horizontally arranged in the shell, and divides the inside of the shell into an air outlet chamber located at the top and an air inlet chamber located at the bottom; the partition can move up and down in the shell; A fixing frame is provided in the cloth bag, and the upper end of the fixing frame is fixed to the partition and can be retracted in the vertical direction; one end of the cloth bag is open and faces upward and is connected to the air outlet chamber, and the other end is sealed, and one end of the opening of the cloth bag is fixed to the fixing frame; a supporting ring is provided in the sealed end of the cloth bag, the supporting ring is located in the cloth bag and is connected to the fixing frame, and a blowing hole is provided at the bottom of the support ring, and a second one-way valve allowing gas to flow out of the support ring is provided in the blowing hole; an elastic member is installed on the fixing frame, the elastic member is vertically arranged and the two ends of the elastic member are respectively connected to the fixing frame and the supporting ring, and the fixing frame is caused to stretch in the vertical direction, thereby causing one end of the cloth bag opening to be located above and the blocked end to be located below; a horizontally extending supporting rod is installed in the outer shell, and the supporting rod is located above the partition; a part of the inner circle of the support ring at one end of the cloth bag blocking is connected to a pull rope, and the other end of the pull rope extends from one end of the cloth bag opening and is then wrapped around the upper side of the support rod and connected to the partition, and the length of the pull rope is fixed; fixed A gas chamber is arranged in the frame, one end of the gas chamber is connected with the blowing hole, and the other end is connected with the air outlet chamber, and the end connected with the air outlet chamber is installed with a first one-way valve allowing gas to enter the gas chamber, and the gas chamber is compressed when the partition moves downward, and a motor is installed on the partition, and the output shaft of the motor extends horizontally and is coaxially connected with a transmission rod, and the transmission rod is in friction contact with the inner wall of the shell or is driven by gear rack meshing, and the fixed frame includes a fixing ring and a telescopic sleeve rod, the fixing ring is fixedly connected with one end of the cloth bag opening, and the fixing ring is fixed to the partition; the telescopic sleeve rod is vertically arranged, and the upper end is connected to the fixing ring, and the lower end is connected to the supporting ring, and the interior of the telescopic sleeve rod is the gas chamber; the upper end of the telescopic sleeve rod passes through the fixing ring and is connected with the air outlet chamber, and the first one-way valve is arranged at one end of the telescopic sleeve rod connected with the air outlet chamber, and the elastic member is a spring, and the spring is sleeved on the telescopic sleeve rod and fits with the inner ring of the cloth bag, and the two ends of the spring are respectively connected to the fixing ring and the supporting ring.

2. The zinc ash filtering device inside the furnace nose cavity according to claim 1, characterized in that: The bottom of the support ring is a curved surface.

3. The zinc ash filtering device inside the furnace nose cavity according to claim 1, characterized in that: The shell is provided with an air inlet communicated with the air inlet chamber and an air outlet communicated with the air outlet chamber.

4. The zinc ash filtering device inside the furnace nose cavity according to claim 1, characterized in that: There are multiple cloth bags, which are distributed at intervals on the partition; there are multiple corresponding fixing frames, elastic parts, support rings, pull ropes and support rods, and the multiple support rods are distributed in parallel and located in the same horizontal plane. The part of one end of each cloth bag that is blocked and located in the support ring is connected to the partition through a pull rope.

5. The zinc ash filtering device inside the furnace nose cavity according to claim 1, characterized in that: A conical collecting hopper is arranged at the bottom of the shell, the large end of which faces upward and is communicated with the air inlet chamber, and is used for collecting zinc ash dropped from the cloth bag.

6. The zinc ash filtering device inside the furnace nose cavity according to claim 1, characterized in that: It also includes an air outlet component, which includes an air outlet pipe, an exhaust pipe and a blower. One end of the air outlet pipe is connected to the air outlet chamber of the shell, and the other end is connected to the blower. The exhaust pipe is vertically arranged, and the lower end is connected to the blower. The blower causes the gas in the air outlet chamber to be discharged through the air outlet pipe and the exhaust pipe.

7. The zinc ash filtering device inside the furnace nose cavity according to claim 1, characterized in that: The utility model also comprises a frame, the shell is fixed to the frame, and the frame is provided with a platform for maintenance and a ladder for climbing to the platform.

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