Negative pressure bag-type dust collector for ferrosilicon smelting

Abstract

The utility model discloses a negative pressure bag-type dust collector for ferrosilicon smelting, and relates to the technical field of dust collection equipment. According to the technical scheme, the dust remover comprises a dust remover body, a plurality of cloth bags are arranged in the dust remover body, a dust removing assembly is arranged at the top of the dust remover body, the outer sides of the cloth bags are sleeved with a plurality of limiting beating rings in the vertical direction, the multiple limiting beating rings and the cloth bags are coaxially arranged, and a gap is formed between every two adjacent limiting beating rings; and the diameter of the limiting striking ring is smaller than that of the cloth bag during inflation expansion. When a plurality of cloth bags in the dust remover main body are subjected to dust removal, the limiting striking rings arranged outside the cloth bags can generate a striking effect by frequently colliding with the cloth bags, so that the overall cleaning effect of dust on the surfaces of the cloth bags is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of dust removal equipment, and particularly relates to a negative pressure bag filter for ferrosilicon smelting. Background Art

[0002] Ferrosilicon is made by electric furnace smelting with coke, steel scrap, quartz (or silica) as raw materials. The waste gas generated during the industrial ferrosilicon smelting process mainly comes from two parts. One part is the mechanical blowout of the furnace charge, and its main components contain pulverized coal and coke powder. The other part is gaseous SiO formed by the reduction of silicon dioxide in silica. The gaseous SiO will continue to be oxidized by air to form silicon dioxide, thus forming extremely fine particles without crystal form. In order to avoid the harm to the environment caused by directly discharging these waste gases into the air, it is often necessary to treat the waste gas generated during ferrosilicon smelting to remove the particulate matter in the waste gas. Currently, the commonly used equipment for treating the waste gas of ferrosilicon smelting is a negative pressure bag filter.

[0003] The negative pressure large bag filter consists of parts such as a dust collector main body, a bag filter, a fan, a hopper, and a control system. Inside the dust collector main body, air enters through the air inlet to form a certain negative pressure. The fan is responsible for providing power to make the air form a certain air flow speed and direction inside the dust collector. This air flow brings the dust particles in the air to the bag filter. The bag filter is the core component of the negative pressure large bag filter. It consists of multiple bags, and each bag is made of special filter materials. When the dust-containing air passes through the bag, the dust particles are captured by the filter materials and adhere to the surface of the bag, while the clean air flows out through the inside of the bag, enters the dust collector outlet, and then is discharged.

[0004] As the dust accumulates on the surface of the bag, the filtration efficiency of the bag will gradually decrease. At this time, it is necessary to clean the bag. The commonly used method is the pulse jet cleaning method. When the control system detects that the resistance of the bag reaches a certain value, it will issue a cleaning instruction. At this time, the pulse valve will quickly open, so that compressed air is sprayed into the bag, and the bag repeatedly "swells, deflates, swells" in a short period of time, so that the dust layer outside the bag detaches in a lump and falls into the hopper under the action of gravity. However, since the waste gas of ferrosilicon smelting contains a large amount of extremely fine particles, some of these particles will be embedded in the fibers on the surface of the bag. If simply blowing air into the bag is difficult to make these small particle dust detach from the bag, so the cleaning effect of the existing negative pressure dust collector for cleaning still needs to be improved. Utility Model Content

[0005] The present application provides a negative pressure bag filter for ferrosilicon smelting, which can improve the cleaning effect of the negative pressure dust collector.

[0006] The above object of the present application is achieved through the following technical solutions:

[0007] A negative pressure bag filter for ferrosilicon smelting, comprising a dust collector main body with a hopper at the lower end. A plurality of bags with a steel bar framework inside are arranged in the dust collector main body. A dust cleaning assembly for blowing air into the plurality of bags is arranged at the top of the dust collector main body. A plurality of limiting and striking rings are sleeved on the outer side of the bag along the vertical direction, and the plurality of limiting and striking rings are coaxially arranged with the bag.

[0008] There is a gap between adjacent limiting and striking rings, and the diameter of the limiting and striking ring is smaller than the diameter of the bag when it is inflated.

[0009] On each row of the bags along the width direction of the dust collector main body, the plurality of limiting and striking rings at the same height are sequentially connected and fixed together. The mutually remote sides of the two limiting and striking rings at both ends are respectively installed on the inner wall of the corresponding side of the dust collector main body through a fixing unit.

[0010] Furthermore, on each row of the bags along the width direction of the dust collector main body, among the limiting and striking rings at the same height, adjacent limiting and striking rings are fixedly connected through a connecting rod.

[0011] Furthermore, a plurality of dust filtering units are arranged in the dust collector main body along its width direction. Each dust filtering unit is composed of adjacent plurality of bags. The two limiting and striking rings at the same height and on the mutually close sides in adjacent two dust filtering units are detachably connected together through a connecting component.

[0012] Furthermore, the connecting component includes two docking rods symmetrically arranged along the horizontal direction. External threads are arranged on the mutually close ends of the two docking rods. The mutually remote ends of the two docking rods are respectively fixedly connected to the adjacent limiting and striking rings. A fastening nut is arranged between the two docking rods, and the fastening nut is simultaneously sleeved on the external threads of the two docking rods and is threadedly connected to both docking rods.

[0013] Furthermore, the fixing unit includes an installation sleeve and a plug. One end of the installation sleeve is fixedly installed on the inner wall of the dust collector main body. One end of the plug is fixedly connected to the limiting and striking ring on one side in the width direction inside the dust collector main body through an extension rod.

[0014] A radial protrusion is arranged in the installation sleeve, and a radial groove matching the radial protrusion is arranged on the plug. When the plug is inserted into the installation sleeve, the radial protrusion can be embedded into the radial groove.

[0015] Further, the diameter of the plug is larger than that of the extension rod connected thereto. A union sleeve is coaxially sleeved outside the plug. One end of the union sleeve is of a closed structure. A through hole equal in diameter to the extension rod is provided at the center of the closed end of the union sleeve. The extension rod passes through the through hole at the closed end of the union sleeve and is movably connected therebetween.

[0016] Internal threads are provided inside the union sleeve, and external threads matching therewith are provided outside the mounting sleeve. When the union sleeve is sleeved on the mounting sleeve, the two can be fixed together by means of threaded connection.

[0017] Further, all connection components located at the same height along the length direction inside the dust collector main body are placed on the same group of horizontal support units. Both ends of all the horizontal support units located at the same position along the width direction inside the dust collector main body are respectively and fixedly installed on two vertically arranged suspension rods. The upper ends of the suspension rods are fixedly connected to the dust collector main body through flange plates.

[0018] Further, the horizontal support unit includes two mutually parallel horizontal support rods. Two docking rods in the corresponding connection components are respectively placed on the two horizontal support rods. The ends of the horizontal support rods are fixedly installed on the suspension rods on the corresponding sides through pipe clamps.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] In the present application, a plurality of limiting impact rings are coaxially sleeved outside each cloth bag inside the dust collector main body along the vertical direction, and the diameter of the limiting impact rings is smaller than the diameter of the cloth bag when it is in an inflated state after being inflated. In this way, when the cloth bag is blocked after being used for a period of time, the dust cleaning assembly is activated to blow air into each cloth bag simultaneously, so that the cloth bag repeatedly expands and contracts in a short time. Since compressed air is blown into the cloth bag, the speed of the cloth bag expanding is very fast. When the cloth bag expands too much, the plurality of limiting impact rings outside it will form limits on a plurality of positions in the vertical direction of the cloth bag, and thus a hitting effect will be generated after contacting the cloth bag. Especially when the cloth bag expands and contracts rapidly and repeatedly, this hitting effect will be more obvious, so that the small particle dust attached to the cloth bag can be detached, thereby effectively improving the final dust cleaning effect. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0022] Figure 1 is the overall structural schematic diagram of the present application;

[0023] Figure 2 is the internal structural schematic diagram after removing one side wall in the length direction of the dust collector main body of the present application;

[0024] Figure 3 is the structural schematic diagram after removing all the small cover plates on the top of the dust collector main body of the present application;

[0025] Figure 4 is the state schematic diagram of one row of filter bags in the width direction of the dust collector main body of the present application when in use with the horizontal support unit and the suspension rod;

[0026] Figure 5 is the state schematic diagram when the two limiting impact rings on the mutually close sides at the same height of two adjacent dust filtering units in the present application are about to be connected through the connecting component;

[0027] Figure 6 is Figure 5 the enlarged structural schematic diagram at A in

[0028] Figure 7 is the structural schematic diagram after disassembling the end fixing unit among the multiple limiting impact rings connected together in the dust filtering unit on one side in the width direction of the dust collector main body of the present application;

[0029] Figure 8 is Figure 7 the enlarged structural schematic diagram at B in

[0030] Reference numerals: 1, ash hopper; 2, dust collector main body; 3, steel bar skeleton; 4, filter bag; 5, dust cleaning component; 6, limiting impact ring; 7, fixing unit; 71, mounting sleeve; 72, plug; 73, extension rod; 74, radial protrusion; 75, radial groove; 8, connecting rod; 9, dust filtering unit; 10, connecting component; 101, docking rod; 102, fastening nut; 11, union sleeve; 12, horizontal support unit; 121, horizontal support rod; 122, pipe clamp; 13, suspension rod; 14, small cover plate; 15, perforated plate. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following clearly and completely describes the technical solutions in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts also belong to the scope of protection of this application.

[0032] As Figures 1 - 4 shown, a negative pressure bag dust collector for ferrosilicon smelting disclosed in this application includes a dust collector main body 2 with a hopper 1 at the lower end. A plurality of bags 4 with a steel bar skeleton 3 inside are arranged in the dust collector main body 2. A dust cleaning assembly 5 for blowing air into the plurality of bags 4 is arranged at the top of the dust collector main body 2. A plurality of limiting and striking rings 6 are sleeved on the outer side of the bag 4 along the vertical direction, and the plurality of limiting and striking rings 6 are coaxially arranged with the bag 4;

[0033] There is a gap between adjacent limiting and striking rings 6, and the diameter of the limiting and striking ring 6 is smaller than the diameter of the bag 4 when it is inflated and expanded.

[0034] On each row of bags 4 in the width direction of the dust collector main body 2, a plurality of limiting and striking rings 6 at the same height are sequentially connected and fixed together, and the mutually remote sides of the two limiting and striking rings 6 at both ends are respectively installed on the inner wall of the corresponding side of the dust collector main body 2 through a fixing unit 7.

[0035] In the above embodiments, as Figure 1 and Figure 3 shown, the dust cleaning assembly 5 arranged at the top of the bag 4 dust collector main body 2 includes components such as an air bag, a blowpipe, and a pulse valve connected to a control system in a negative pressure bag 4 dust collector of the prior art. When it is necessary to dust the bag 4, the dust cleaning assembly 5 can blow compressed air into the plurality of bags 4 at the same time, so that the bag 4 repeatedly undergoes the deformation of "swell, deflate, swell" in a short time, thereby peeling off the ash blocks on the bag 4.

[0036] During ferrosilicon smelting, a lot of gaseous SiO in its flue gas will be oxidized by air to produce extremely fine particles. When these small particle dusts are filtered by the filter bag, they will adhere to the surface of the bag 4 due to surface tension, and some of them will even drill into the gaps between the fibers on the surface of the bag 4. Simply relying on the expansion and contraction of the bag 4 has limited cleaning effect on this part of the dust.

[0037] Therefore, in the present application, a plurality of limiting and striking rings 6 are arranged vertically on the outer side of each cloth bag 4. The diameter of the limiting and striking ring 6 is between the diameter of the cloth bag 4 during normal use and the diameter when inflated by blowing air. In this way, during dust cleaning, after the dust cleaning assembly 5 blows compressed air into the plurality of cloth bags 4, when the cloth bag 4 expands outward and encounters the limiting and striking ring 6, the limiting and striking ring 6 will suddenly limit the rapidly expanding cloth bag 4, thereby forming a striking effect in the contact area with the cloth bag 4. Especially when the cloth bag 4 expands and contracts rapidly and repeatedly, this striking effect will be more obvious. Along with the rapid striking of the limiting and striking ring 6 on the cloth bag 4, the fibers on the surface of the cloth bag 4 will vibrate to a certain extent. The energy generated during this vibration process will increase the friction between the fibers on the surface of the cloth bag 4, thereby pushing the dust adhering to the gaps between them away from the surface of the cloth bag 4. In addition, when striking the cloth bag 4, the force acting on the cloth bag 4 will also change the position direction of the dust between the fibers, and even cause some adjacent dust to collide, thereby destroying the adhesion between the dust and the surface of the cloth bag 4, facilitating its peeling off from the surface of the cloth bag 4. Moreover, when the surface of the cloth bag 4 vibrates, gravity will cause the dust to move downward, thereby reducing the contact area and adhesion between the dust and the fibers on the surface of the cloth bag 4, and then falling off. The principle of removing dust from the fabric by striking is prior art, and more specific content will not be elaborated. Compared with the prior art, the limiting and striking ring 6 added on the outer side of the cloth bag 4 in the present application effectively improves the dust treatment effect on the surface of the cloth bag 4. During actual production, for some fine particulate dust with a relatively high moisture content, a sonic dust cleaner can also be added to the main body of the dust collector (the sonic dust cleaner belongs to prior art and has been widely used in equipment such as electrostatic precipitators, bag dust collectors, and cyclone dust collectors, and the specific principle will not be elaborated here). In this way, the vibration effect of the cloth bag during dust cleaning can be effectively improved, ensuring that the negative pressure bag dust collector of the present application has a good cleaning ability when cleaning different dusts on the cloth bag.

[0038] Further, as Figure 5 shown, on each row of cloth bags 4 along the width direction of the main body 2 of the dust collector, among the limiting and striking rings 6 at the same height, adjacent limiting and striking rings 6 are fixedly connected to each other through a connecting rod 8.

[0039] In the above embodiments, all the limiting and striking rings 6 at the same height on each row of cloth bags 4 along the width direction in the dust collector are sequentially connected and fixed together through the connecting rod 8, which makes it more convenient for workers to install.

[0040] Further, as Figure 2 、 Figure 4 、 Figure 5 and Figure 6As shown in the figure, multiple groups of dust filtering units 9 are arranged in the dust collector main body 2 along its width direction. Each group of dust filtering units 9 consists of multiple adjacent cloth bags 4. Two limiting and hitting rings 6 on the mutually approaching sides at the same height between two adjacent groups of dust filtering units 9 are detachably connected together through a connecting component 10.

[0041] In the above embodiments, as Figure 1 and Figure 2 shown, generally, the cover plate at the top of the dust collector main body 2 is divided into multiple independent small cover plates 14, which facilitates workers to lift the cover plate during maintenance. There will be a certain interval between different small cover plates 14. As Figure 3 shown, correspondingly, the mounting holes on the flower plate 15 below the cover plate at the top of the dust collector main body 2 are also equally divided into areas with the same number as the small cover plates 14. In this way, there will be a gap slightly larger than the distance between two ordinary adjacent cloth bags 4 between the mounting holes in different areas ( Figure 3 the distance a marked in the figure is the gap between the mounting holes in different areas). Therefore, in actual production, the cloth bags 4 in the dust collector main body 2 can be divided according to the positions of these gaps. For example, Figure 2 and Figure 4 in the figure, there are a total of twelve cloth bags 4 in each row along the width direction of the dust collector main body 2. There is a relatively wide gap between every four cloth bags 4. Therefore, taking four parts as a group, this is also a group of dust filtering units 9 in the above content. The four limiting and hitting rings 6 on each group of dust filtering units 9 are fixed together through a connecting rod 8. In this way, the four limiting and hitting rings 6 on each group of dust filtering units 9 form a whole.

[0042] In the above embodiments, two limiting and hitting rings 6 on the mutually approaching sides between two adjacent groups of dust filtering units 9 are detachably connected together through a connecting component 10. The wide gap between two adjacent groups of dust filtering units 9 can ensure sufficient operating space for the connecting component 10. During subsequent maintenance, when there is a problem with the limiting and hitting rings 6 on one group of dust filtering units 9, only the corresponding several limiting and hitting rings 6 need to be replaced together, rather than replacing all the limiting and hitting rings 6 in the corresponding row. This can reduce the maintenance cost.

[0043] Furthermore, as Figure 5 and Figure 6 shown, the connecting component 10 includes two docking rods 101 that are horizontally symmetric to each other. External threads are provided at the mutually approaching ends of the two docking rods 101. The mutually remote ends of the two docking rods 101 are respectively fixedly connected to the limiting and hitting rings 6 in their respective adjacent positions; a fastening nut 102 is provided between the two docking rods 101, and the fastening nut 102 is simultaneously sleeved on the external threads of the two docking rods 101 and is threadedly connected to both docking rods 101.

[0044] In the above embodiments, when the two limiting and striking rings 6 on the mutually adjacent sides of two adjacent dust filtering units 9 are to be fixed together, the fastening nut 102 can be first screwed onto the docking rod 101 of one of the limiting and striking rings 6, then the docking rods 101 of the two limiting and striking rings 6 are aligned, and the fastening nut 102 is screwed along their axial direction until the fastening nut 102 is threadedly connected to the external thread portions of both docking rods 101, and then they can be fixed together. When it is necessary to disassemble the limiting and striking rings 6 on the two dust filtering units 9 subsequently, the fastening nut 102 can be completely screwed onto one of the docking rods 101, which is simple and convenient to operate.

[0045] Further, as Figure 7 and Figure 8 shown, the fixing unit 7 includes a mounting sleeve 71 and a plug 72. One end of the mounting sleeve 71 is fixedly installed on the inner wall of the dust collector main body 2, and one end of the plug 72 is fixedly connected to the limiting and striking ring 6 on one side in the width direction inside the dust collector main body 2 through an extension rod 73.

[0046] A radial protrusion 74 is provided inside the mounting sleeve 71, and a radial groove 75 matching the radial protrusion 74 is provided on the plug 72. When the plug 72 is inserted into the mounting sleeve 71, the radial protrusion 74 can be embedded in the radial groove 75.

[0047] In the above embodiments, among the limiting and striking rings 6 at the same height in one row of filter bags 4 in the width direction of the dust collector main body 2, the two limiting and striking rings 6 on both sides are both connected to the dust collector main body 2 through the fixing unit 7. An extension rod 73 is fixedly connected to the mutually remote sides of the two limiting and striking rings 6 on both sides. A plug 72 is fixedly installed on the mutually remote sides of the two extension rods 73. A radial groove 75 matching the radial protrusion 74 inside the mounting sleeve 71 is provided on the plug 72. In this way, when the plug 72 on the extension rod 73 is inserted into the mounting sleeve 71 fixed on the inner wall of the dust collector main body 2, the radial groove 75 on the plug 72 can cooperate with the radial protrusion 74 inside the mounting sleeve 71, thereby preventing the limiting and striking ring 6 from rotating around the axis of the extension rod 73 during use and affecting the use effect.

[0048] Further, as Figure 7 and Figure 8 shown, the diameter of the plug 72 is larger than the diameter of the extension rod 73 connected thereto. A union sleeve 11 is coaxially sleeved outside the plug 72. One end of the union sleeve 11 is of a closed structure. A through hole equal in diameter to the extension rod 73 is provided at the center of the closed end of the union sleeve 11. The extension rod 73 passes through the through hole at the closed end of the union sleeve 11 and is movably connected therebetween.

[0049] The interior of the union sleeve 11 is provided with internal threads, and the outer side of the mounting sleeve 71 is provided with external threads matching therewith. When the union sleeve 11 is sleeved on the mounting sleeve 71, the two can be fixed together by means of threaded connection.

[0050] In the above embodiments, the diameter of the plug 72 is larger than the diameter of the extension rod 73. In this way, when the union sleeve 11 on the outer side of the plug 72 moves along the extension rod 73 to the external thread part on the outer side of the mounting sleeve 71, the closed end of the union sleeve 11 can limit the plug 72, so that the extension rod 73 will not easily fall off from the mounting sleeve 71 during use, which can further improve the safety of the limit striking ring 6 during use.

[0051] Furthermore, as Figure 2 and Figure 4 shown, all the connecting components 10 located at the same height along the length direction of the dust collector main body 2 are placed on the same group of horizontal support units 12. At both ends of all the horizontal support units 12 located at the same position along the width direction of the dust collector main body 2, they are respectively fixedly installed on two vertically arranged suspension rods 13, and the upper ends of the suspension rods 13 are fixedly connected to the dust collector main body 2 through flange plates.

[0052] In the above embodiments, the horizontal support unit 12 is arranged below the connecting component 10. On the one hand, it is because there are relatively wide gaps between adjacent dust filtering units 9 that can provide installation space for it. On the other hand, the suspension rod 13 can provide a uniform supporting force for a plurality of limit striking rings 6 connected together through the horizontal support unit 12, thereby reducing the risk of deformation of the limit striking rings 6 in the middle suspended part.

[0053] Furthermore, as Figure 4 shown, the horizontal support unit 12 includes two mutually parallel horizontal support rods 121. The two butt rods 101 in the corresponding connecting component 10 are respectively placed on the two horizontal support rods 121, and the ends of the horizontal support rods 121 are fixedly installed on the corresponding suspension rods 13 through pipe clamps 122.

[0054] In the above embodiments, the two horizontal support rods 121 in the horizontal support unit 12 can simultaneously support the butt rods 101 in all the connecting components 10 along the length direction of the dust collector main body 2 at the corresponding height to ensure the stability of a plurality of limit striking rings 6 during use. The two ends of the horizontal support rods 121 are respectively fixedly installed on the corresponding suspension rods 13 through a pipe clamp 122, so that not only the fixing effect is good, but also the subsequent disassembly is very convenient.

[0055] The implementation principle of this embodiment is as follows: When it is necessary to clean the dust bags 4 in the dust collector main body 2, the cleaning assembly 5 blows compressed air into the multiple dust bags 4 at a certain frequency, which will cause the dust bags 4 to expand and contract repeatedly in a short period of time. During the process of the dust bag 4 expanding outwards, it will encounter the limit hitting ring 6. The limit hitting ring 6 will suddenly limit the rapidly expanding dust bag 4, and the limit hitting ring 6 will produce a hitting effect on the dust bag 4. Along with the rapid repeated expansion and contraction of the dust bag 4, this hitting effect will be particularly obvious. Thus, the lumpy dust layer on the surface of the dust bag 4 and the fine dust in the fibers on the surface of the dust bag 4 are both efficiently peeled off to ensure that the treated dust bag 4 resumes its filtration efficiency again.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A negative pressure bag dust collector for ferrosilicon smelting, comprising a dust collector main body (2) with a hopper (1) provided at the lower end, a plurality of bags (4) with a steel bar framework (3) inside are arranged in the dust collector main body (2), and a dust cleaning assembly (5) for blowing air into the plurality of bags (4) is provided at the top of the dust collector main body (2), characterized in that: A plurality of limiting and striking rings (6) are sleeved on the outer side of the cloth bag (4) along the vertical direction, and the plurality of limiting and striking rings (6) are coaxially arranged with the cloth bag (4); There is a gap between adjacent limiting and striking rings (6), and the diameter of the limiting and striking ring (6) is smaller than the diameter of the cloth bag (4) when it is inflated and expanded; On each row of the cloth bags (4) in the width direction of the dust collector main body (2), a plurality of the limiting and striking rings (6) at the same height are sequentially connected and fixed together, and the mutually remote sides of the two limiting and striking rings (6) at both ends are respectively installed on the inner wall of the corresponding side of the dust collector main body (2) through a fixing unit (7).

2. The negative pressure bag filter for ferrosilicon smelting according to claim 1, characterized in that: On each row of the cloth bags (4) in the width direction of the dust collector main body (2), among the limiting and striking rings (6) at the same height, adjacent limiting and striking rings (6) are fixedly connected through a connecting rod (8).

3. The negative pressure bag filter for ferrosilicon smelting according to claim 2, characterized in that: A plurality of dust filtering units (9) are arranged in the dust collector main body (2) in the width direction thereof, and each dust filtering unit (9) is composed of adjacent cloth bags (4). The two limiting and striking rings (6) on the mutually close sides at the same height in adjacent two dust filtering units (9) are detachably connected together through a connecting member (10).

4. The negative pressure bag filter for ferrosilicon smelting according to claim 3, wherein: The connecting member (10) includes two docking rods (101) symmetrically arranged in the horizontal direction. External threads are provided on the mutually close ends of the two docking rods (101), and the mutually remote ends of the two docking rods (101) are respectively fixedly connected to the adjacent limiting and striking rings (6); a fastening nut (102) is arranged between the two docking rods (101), and the fastening nut (102) is simultaneously sleeved on the external threads of the two docking rods (101) and is threadedly connected to both docking rods (101).

5. The negative pressure bag filter for ferrosilicon smelting according to any one of claims 1 to 4, characterized in that: The fixing unit (7) includes an installation sleeve (71) and a plug (72). One end of the installation sleeve (71) is fixedly installed on the inner wall of the dust collector main body (2), and one end of the plug (72) is fixedly connected to the limiting and striking ring (6) on one side in the width direction inside the dust collector main body (2) through an extension rod (73); A radial protrusion (74) is arranged in the installation sleeve (71), and a radial groove (75) matching the radial protrusion (74) is arranged on the plug (72). When the plug (72) is inserted into the installation sleeve (71), the radial protrusion (74) can be embedded into the radial groove (75).

6. The negative pressure bag filter for ferrosilicon smelting according to claim 5, wherein: The diameter of the plug (72) is larger than the diameter of the extension rod (73) connected thereto. A union sleeve (11) is coaxially sleeved on the outer side of the plug (72). One end of the union sleeve (11) is a closed structure, and a through hole equal in diameter to the extension rod (73) is arranged at the center of the closed end of the union sleeve (11). The extension rod (73) passes through the through hole at the closed end of the union sleeve (11) and is movably connected therebetween; The inside of the union sleeve (11) is provided with internal threads, and the outside of the mounting sleeve (71) is provided with external threads matching the internal threads. When the union sleeve (11) is sleeved on the mounting sleeve (71), the two can be fixed together by means of threaded connection.

7. The negative pressure bag dust collector for ferrosilicon smelting according to claim 4, characterized in that: All the connecting components (10) located at the same height along the length direction inside the dust collector main body (2) are placed on the same set of horizontal support units (12). At both ends of all the horizontal support units (12) located at the same position along the width direction inside the dust collector main body (2), they are respectively fixedly installed on two vertically arranged suspension rods (13). The upper ends of the suspension rods (13) are fixedly connected to the dust collector main body (2) through flange plates.

8. The negative pressure bag filter for ferrosilicon smelting according to claim 7, characterized in that: The horizontal support unit (12) includes two mutually parallel horizontal support rods (121). Two of the docking rods (101) in the corresponding connecting components (10) are respectively placed on the two horizontal support rods (121). The ends of the horizontal support rods (121) are fixedly installed on the suspension rods (13) on the corresponding side through pipe clamps (122).

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