Negative pressure type bag-type dust collector of metal silicon submerged arc furnace

Abstract

The utility model discloses a metal silicon submerged arc furnace negative pressure type bag-type dust collector which comprises a first bag-type dust collector body, a switching mechanism is arranged on the right side of the first bag-type dust collector body, a sealing mechanism is arranged in the switching mechanism, the switching mechanism comprises a second bag-type dust collector body, and the second bag-type dust collector body is provided with a sealing mechanism. Air inlet pipes are fixedly mounted on the opposite sides of the second bag-type dust collector body and the first bag-type dust collector body, a separation pipe is fixedly mounted between the opposite sides of the two air inlet pipes, and a machine shell is fixedly mounted at the top of the separation pipe. According to the negative pressure type bag-type dust remover for the metal silicon submerged arc furnace, the switching mechanism is arranged, the purpose of switching the two air inlet pipes is achieved, continuous dust removal can be conducted on the metal silicon submerged arc furnace, meanwhile, a straight pipe is transformed into an inclined pipe, the number of elbows is reduced, the diameter of a pipeline is increased, the passing ability of dust is improved, and the flow speed of dust in the pipeline is increased; and dust blockage is reduced.

Description

Technical Field

[0001] This utility model relates to a negative pressure bag filter for a silicon metal submerged arc furnace, and belongs to the technical field of bag filters. Background Technology

[0002] The dust removal process of the electric arc furnace for silicon metal submerged arc furnace is as follows: under the suction action of the centrifugal main fan, the flue gas is drawn out from the semi-enclosed electric furnace and enters a secondary combustion chamber and pre-dust collector along the flue to separate coarse particles and sparks, so that the flue gas is fully combusted. The flue gas after combustion enters a heat exchanger to reduce the flue gas temperature, and then is sent into a bag filter by a fan. The dust is retained in the filter bags, and the purified flue gas is discharged into the atmosphere through the top of the dust collector. The fine powder under the ash hopper is manually or mechanically put into bags for output.

[0003] According to patent publication CN217287572U, a negative pressure low-pressure pulse bag filter dust collector for boiler flue gas is proposed. This device, through the installation of an outer shell, utilizes the cooperation between the shell and the dust collection mechanism to fix a fixed plate using limiting blocks and limiting grooves. After fixing, bolts are used to further limit the position of the fixed plate through connecting holes and limiting holes, increasing the stability of the fixed plate during dust collection. After fixing, a vibrator is used to perform pulse dust collection on the bag filter, causing dust on the outside of the bag filter to fall off. The negative pressure low-pressure pulse bag filter, used for boiler flue gas, has greatly improved the working efficiency of the bag filter. However, the original negative pressure dust collector back suction pipe of the electric arc furnace is a straight pipe with many bends, which affects the flow speed of dust. At the same time, the dust generated in the production of the electric arc furnace has a high viscosity and easily sticks to the pipe wall, causing frequent blockage of the back suction pipe. Cleaning the pipe is very difficult and requires power outage and production stoppage for maintenance, which takes a long time and is not conducive to continuous production. It has a great impact on maintaining good furnace conditions, product quality and reducing production costs. Utility Model Content

[0004] This utility model provides a negative pressure bag filter dust collector for metal silicon submerged arc furnaces to overcome the problems of existing negative pressure low-pressure pulse bag filter dust collectors for boiler flue gas. The original negative pressure dust collectors for submerged arc furnaces use straight pipes with many connecting elbows at bends, which affects the flow speed of dust. At the same time, the dust generated in submerged arc furnace production has a high viscosity and easily adheres to the pipe wall, causing frequent blockage of the back suction pipe. Cleaning the pipe is quite difficult and requires power outages and production shutdowns for maintenance, which takes a long time and is not conducive to continuous production. This has a significant impact on maintaining good furnace conditions, product quality, and reducing production costs.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a negative pressure bag filter dust collector for a silicon metal submerged arc furnace, including a first bag filter body, a switching mechanism is provided on the right side of the first bag filter body, and a sealing mechanism is provided inside the switching mechanism.

[0007] The switching mechanism includes a second bag filter body. An air inlet pipe is fixedly installed on one side of both the second and first bag filter bodies. A separation pipe is fixedly installed between the opposite sides of the two air inlet pipes. A housing is fixedly installed on the top of the separation pipe. A motor is fixedly installed on the right side wall of the inner cavity of the housing. The output shaft of the motor is fixedly connected to a worm gear via a coupling. A rotating rod with one end penetrating and extending into the housing is rotatably installed inside the separation pipe. A worm wheel is fixedly installed on the outer surface of the rotating rod, and the outer surface of the worm wheel meshes with the outer surface of the worm gear. A closing plate is fixedly installed on the outer surface of the rotating rod.

[0008] Furthermore, the sealing mechanism includes a mounting ring, the outer surface of which is fixedly connected to the inner surface of the separation tube, and a partition plate is fixedly installed between the inner top wall and the inner bottom wall of the separation tube.

[0009] Furthermore, the two intake pipes are inclined when viewed from above.

[0010] Furthermore, the diameter of the separator pipe is twice the diameter of the intake pipe.

[0011] Furthermore, the inner top wall of the separation tube is provided with a movable hole, and a rubber ring is fixedly installed on the inner surface of the movable hole. The inner surface of the rubber ring is sealed to the outer surface of the rotating rod.

[0012] Furthermore, two sealing rings are fixedly installed on the front side of the mounting ring and the front side of the partition plate, and the front side of the sealing rings is sealed to the back side of the closing plate.

[0013] Furthermore, exhaust pipes are fixedly installed on opposite sides of both the second bag filter body and the first bag filter body.

[0014] Furthermore, induced draft fans are fixedly installed on opposite sides of both exhaust pipes.

[0015] The beneficial effects achieved by this utility model are as follows: by setting a switching mechanism, the purpose of switching between the two air inlet pipes is achieved, which can continuously remove dust from the metal silicon submerged arc furnace. At the same time, the straight pipe is transformed into an inclined pipe, reducing the number of bends, increasing the pipe diameter, improving dust throughput, increasing the dust flow velocity in the pipe, and reducing dust blockage. By setting a sealing mechanism, the closing plate is sealed to prevent smoke and dust from leaking in, thereby improving the practicality of the bag filter dust collector. Attached Figure Description

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 For the utility model structure Figure 1 A magnified view of point A in the figure;

[0019] Figure 3 For the utility model structure Figure 1 A partial top-view cross-section.

[0020] In the diagram: 1. First bag filter body; 2. Switching mechanism; 201. Second bag filter body; 202. Inlet pipe; 203. Separation pipe; 204. Housing; 205. Motor; 206. Worm gear; 207. Rotating rod; 208. Worm wheel; 209. Closing plate; 3. Sealing mechanism; 301. Mounting ring; 302. Partition plate; 303. Sealing ring; 304. Exhaust pipe; 305. Exhaust fan. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example 1

[0023] like Figure 1-2 As shown, a negative pressure bag filter dust collector for a silicon metal submerged arc furnace includes a first bag filter body 1. A switching mechanism 2 is provided on the right side of the first bag filter body 1. A sealing mechanism 3 is provided inside the switching mechanism 2. The switching mechanism 2 includes a second bag filter body 201. An air inlet pipe 202 is fixedly installed on the opposite side of the second bag filter body 201 and the first bag filter body 1. The two air inlet pipes 202 are inclined when viewed from above. Dust is transported through the inclined air inlet pipes 202. A separation pipe 203 is fixedly installed between the opposite sides of the two air inlet pipes 202. The diameter of the separation pipe 203 is twice the diameter of the air inlet pipe 202. Dust is transported through the larger diameter separation pipe 203.

[0024] A housing 204 is fixedly installed on the top of the separation tube 203. A motor 205 is fixedly installed on the right side wall of the inner cavity of the housing 204. The output shaft of the motor 205 is fixedly connected to a worm gear 206 through a coupling. The motor 205 drives the worm gear 206 to rotate. A rotating rod 207 is rotatably installed inside the separation tube 203, with one end penetrating and extending into the housing 204. A movable hole is opened on the inner top wall of the separation tube 203. A rubber ring is fixedly installed on the inner surface of the movable hole. The inner surface of the rubber ring is sealed to the outer surface of the rotating rod 207. A worm wheel 208 is fixedly installed on the outer surface of the rotating rod 207. The outer surface of the worm wheel 208 meshes with the outer surface of the worm gear 206. A closing plate 209 is fixedly installed on the outer surface of the rotating rod 207. The worm gear 206 drives the rotating rod 207 and the closing plate 209 to rotate 180° through the worm wheel 208.

[0025] Specifically, when removing dust from a silicon metal submerged arc furnace, dust is transported through a large-diameter separation pipe 203 and transmitted through an inclined air inlet pipe 202. The motor 205 is started, driving the worm gear 206 to rotate. The worm gear 206 drives the rotating rod 207 and the closing plate 209 to rotate 180° via a worm wheel 208, switching between the first bag filter body 1 and the second bag filter body 201. This allows for continuous dust removal from the silicon metal submerged arc furnace. Simultaneously, the straight pipe is modified into an inclined pipe, reducing the number of bends, increasing the pipe diameter, improving dust throughput, increasing dust flow velocity in the pipe, and reducing dust blockage.

[0026] Example 2

[0027] Please see Figure 1 and Figure 3 Based on Embodiment 1, the sealing mechanism 3 includes an installation ring 301. The outer surface of the installation ring 301 is fixedly connected to the inner surface of the separation tube 203. A partition plate 302 is fixedly installed between the inner top wall and the inner bottom wall of the separation tube 203. Two sealing rings 303 are fixedly installed on the front of the installation ring 301 and the front of the partition plate 302. The front of the sealing rings 303 is sealed to the back of the closing plate 209. The installation ring 301 and the partition plate 302 seal the back of the closing plate 209 through the sealing rings 303. An exhaust pipe 304 is fixedly installed on the opposite side of the second bag dust collector body 201 and the first bag dust collector body 1. An induced draft fan 305 is fixedly installed on the opposite side of the two exhaust pipes 304. The induced draft fan 305 makes the interior of the first bag dust collector body 1 and the second bag dust collector body 201 negative pressure through the exhaust pipes 304.

[0028] Specifically, the mounting ring 301 and the partition plate 302 seal the back of the closing plate 209 with the sealing ring 303 to prevent dust from seeping in from the gaps. The induced draft fan 305 creates a negative pressure inside the first bag filter body 1 and the second bag filter body 201 through the exhaust pipe 304 to prevent smoke and dust from leaking in, thereby improving the practicality of the bag filter.

[0029] Working principle:

[0030] (1) When removing dust from the metal silicon submerged arc furnace, the dust is transported through the large-diameter separation pipe 203 and the dust is transmitted through the inclined air inlet pipe 202. When switching between the first bag dust collector body 1 and the second bag dust collector body 201, the motor 205 is started, which drives the worm gear 206 to rotate. The worm gear 206 drives the rotating rod 207 and the closing plate 209 to rotate 180° through the worm wheel 208.

[0031] (2) The mounting ring 301 and the partition plate 302 seal the back of the closing plate 209 through the sealing ring 303 to prevent dust from seeping in from the gap. The induced draft fan 305 makes the interior of the first bag dust collector body 1 and the second bag dust collector body 201 under negative pressure through the exhaust pipe 304.

[0032] 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. The terminology used in the description of this application is only for describing specific embodiments and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings indicate similar items, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0034] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

Claims

1. A negative pressure bag filter for a silicon-metal submerged arc furnace, characterized in that, The first bag filter body (1) is characterized in that: a switching mechanism (2) is provided on the right side of the first bag filter body (1), and a sealing mechanism (3) is provided inside the switching mechanism (2). The switching mechanism (2) includes a second bag filter body (201). An air inlet pipe (202) is fixedly installed on the opposite side of the second bag filter body (201) and the first bag filter body (1). A separation pipe (203) is fixedly installed between the opposite sides of the two air inlet pipes (202). A housing (204) is fixedly installed on the top of the separation pipe (203). A motor (205) is fixedly installed on the right side wall of the inner cavity of the housing (204). The output shaft of the motor (205) is fixedly connected to a worm gear (206) through a coupling. A rotating rod (207) with one end penetrating and extending into the housing (204) is rotatably installed inside the separation pipe (203). A worm wheel (208) is fixedly installed on the outer surface of the rotating rod (207). The outer surface of the worm wheel (208) meshes with the outer surface of the worm gear (206). A closing plate (209) is fixedly installed on the outer surface of the rotating rod (207).

2. The negative pressure bag filter for a silicon metal submerged arc furnace according to claim 1, characterized in that, The sealing mechanism (3) includes a mounting ring (301), the outer surface of which is fixedly connected to the inner surface of the separation tube (203), and a partition plate (302) is fixedly installed between the inner top wall and the inner bottom wall of the separation tube (203).

3. The negative pressure bag filter for a silicon metal submerged arc furnace according to claim 1, characterized in that, The two air intake pipes (202) are inclined from top to bottom.

4. The negative pressure bag filter for a silicon metal submerged arc furnace according to claim 1, characterized in that, The diameter of the separator (203) is twice that of the intake pipe (202).

5. The negative pressure bag filter for a silicon metal submerged arc furnace according to claim 1, characterized in that, The inner top wall of the separation tube (203) is provided with a movable hole, and a rubber ring is fixedly installed on the inner surface of the movable hole. The inner surface of the rubber ring is sealed to the outer surface of the rotating rod (207).

6. The negative pressure bag filter for a silicon metal submerged arc furnace according to claim 2, characterized in that, Two sealing rings (303) are fixedly installed on the front of the mounting ring (301) and the front of the partition plate (302), and the front of the sealing rings (303) is sealed to the back of the closing plate (209).

7. The negative pressure bag filter for a silicon metal submerged arc furnace according to claim 1, characterized in that, The second bag filter body (201) and the first bag filter body (1) are both fixedly installed with exhaust pipes (304) on opposite sides.

8. The negative pressure bag filter for a silicon metal submerged arc furnace according to claim 7, characterized in that, A blower (305) is fixedly installed on the opposite side of each of the two exhaust pipes (304).

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