Tail gas recovery equipment for silicon carbide smelting

Abstract

Tail gas recovery equipment for silicon carbide smelting comprises a frame, a furnace cover assembly is installed on the frame in a foldable mode, the furnace cover assembly is covered with a soft cover, the furnace cover assembly comprises a plurality of walking seats movably installed at the upper end of the frame, and folding plates are arranged between the adjacent walking seats in the longitudinal direction. A transverse rod is arranged between every two adjacent walking seats in the transverse direction, and the outer side ends of the walking seats are connected with folding rods used for supporting the soft covers. And all the folding furnace hoods can be folded through the folding device, and meanwhile, the sizes of the furnace hoods are not changed, so that the problem that the lengths of the folding furnace hoods are limited due to the fact that the folding furnace hoods are gradually reduced in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide smelting technology, and more specifically to a tail gas recovery device for silicon carbide smelting. Background Technology

[0002] With the continuous advancement of science and technology, my country's silicon carbide smelting production process and equipment have made rapid progress. Silicon carbide, due to its unique advantages, is widely used in products such as electric heating elements, advanced refractory materials, and steelmaking deoxidizers. It possesses high thermal conductivity, good wear resistance, and stable chemical properties, and is often used as a high-quality industrial raw material or chemical product. However, the silicon carbide smelting process generates waste gases such as CO, SO2, and CO2, which not only harm the health of workers but also cause serious environmental pollution.

[0003] There are two modes for recovering and treating tail gas from silicon carbide smelting: (1) the gas generated during smelting is collected after combustion, and then the collected tail gas is centrally treated for desulfurization and denitrification before being discharged after meeting the standards; (2) the gas generated during smelting is centrally collected and purified before CO is comprehensively utilized (such as for combustion power generation, production of chemical raw materials, etc.). However, the key point in both recovery modes is how to collect the gas generated during silicon carbide smelting or the tail gas after combustion. The main difficulties are: (1) Silicon carbide smelting furnaces are relatively long, and the flue gas emission area is large, requiring the fabrication of huge gas collection hoods; (2) The temperature at the top of the furnace charge is high during the smelting process, usually above 300 degrees Celsius, making it difficult for ordinary gas collection hoods to be used under these conditions; (3) The tail gas produced during smelting contains CO, posing a risk of explosion; (4) Silicon carbide smelting furnaces are generally used in groups, usually 4 to 6 furnaces per group. According to the smelting process requirements, gas collection hoods are needed during the smelting process, but the gas collection hoods must be completely removed when the furnace is being cleared, unloaded, or loaded after smelting. Therefore, there is currently no mature furnace hood system on the market for collecting tail gas from silicon carbide smelting.

[0004] Chinese utility model patent application number 201810907830.0 describes a telescopic furnace hood for collecting tail gas in silicon carbide smelting. It adopts a telescopic structure to reduce the footprint and facilitate the use of a group of silicon carbide smelting furnaces. However, because it adopts an outer layer inside an inner layer structure, the inner layer must be smaller than the outer layer. This means that when the telescopic furnace hood is long, the single section of the furnace hood at the tail will become very small. If the structure is too small, it will be unusable. On the other hand, it also limits the length of the telescopic furnace hood. Utility Model Content

[0005] One advantage of this invention is that it provides a tail gas recovery device for silicon carbide smelting. The folding device can retract all the folding furnace covers while keeping the size of the furnace covers unchanged. This solves the problem in the prior art where the folding furnace covers gradually become smaller and thus limit the length.

[0006] To achieve at least one of the above advantages of this utility model, this utility model provides a tail gas recovery device for silicon carbide smelting, including a frame, a furnace hood assembly installed on the frame in a foldable manner, a soft cover covering the furnace hood assembly, the furnace hood assembly including a plurality of walking seats installed movably on the upper end of the frame, a folding plate provided between adjacent walking seats in the longitudinal direction, a crossbar provided between adjacent walking seats in the transverse direction, and a folding rod for supporting the soft cover connected to the outer end of the walking seats.

[0007] According to one embodiment of the present invention, the frame includes several columns, the upper end of the columns is connected to an upper rail, and the lower end of the traveling seat is equipped with rollers, and the traveling seat is connected to the upper rail through the rollers.

[0008] According to one embodiment of the present invention, the lower end of the column is connected to a lower rail, and the lower ends of several retractable rods are provided with rollers, and the retractable rods are connected to the lower rail through the rollers.

[0009] According to one embodiment of the present invention, the folding plate is a foldable structure, which consists of a middle bending section, a straight plate section, an edge bending section and a connecting section from the middle to both ends. The folding plate is connected to the walking seat through the connecting section. The middle bending section and the edge bending section are made of soft material and are bendable.

[0010] According to one embodiment of the present invention, several fixing seats are provided on both sides of the retractable rod, and a through hole is provided in the middle of the fixing seat. A bolt is provided in the through hole in a detachable manner, and the retractable rod and the soft cover are connected by bolts.

[0011] According to one embodiment of the present invention, a support frame is connected to the lower end of the upper rail, and an air pipe is connected to the support frame. The air pipe is provided with several through holes that allow it to communicate with the inside and outside.

[0012] According to one embodiment of the present invention, a base is fixedly connected to the bottom end of the column.

[0013] According to one embodiment of the present invention, it further includes a fixing rod, which is connected to the column at the far end of the frame, and the side of the fixing rod is connected to the soft cover.

[0014] According to one embodiment of the present invention, it further includes a drive assembly, which includes a motor fixedly mounted at the end of the frame. The output shaft of the motor is connected to a rope roller, and a steel wire rope is wound on the rope roller. A fixing ring is provided at the lower end of the outermost crossbar, and guide rope rings are provided on the other crossbars other than the outermost crossbar. The steel wire rope passes through the guide rope rings in sequence and is connected to the fixing rings.

[0015] According to one embodiment of the present invention, the soft cover is connected to the crossbar. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the unfolded structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention in its folded state;

[0018] Figure 3 This is a schematic diagram of the walking component structure of this utility model;

[0019] In the attached diagram: 1. Base, 2. Lower rail, 3. Fixing rod, 4. Air pipe, 5. Column, 6. Middle bending section, 7. Side bending section, 8. Straight plate section, 9. Traveling seat, 10. Upper rail, 11. Retracting rod, 12. Fixing seat, 13. Support frame, 14. Roller, 15. Crossbar, 16. Guide rope ring, 17. Motor, 18. Rope roller, 19. Steel wire rope. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description will be provided in conjunction with the appendix of this utility model. Figure 1 ~Attached Figure 3 The present invention will be described in more detail below.

[0021] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0022] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., 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 utility model and simplifying the description, and 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. Therefore, the above terms should not be construed as limitations on this utility model.

[0023] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0024] This utility model provides a tail gas recovery device for silicon carbide smelting, including a frame. A furnace hood assembly is foldably mounted on the frame. A soft cover is placed over the furnace hood assembly. The furnace hood assembly includes several movable seats 9 mounted on the upper part of the frame. Folding plates are provided between adjacent seats 9 in the longitudinal direction, and crossbars 15 are provided between adjacent seats 9 in the transverse direction. The outer ends of the seats 9 are connected to folding rods 11 for supporting the soft cover. It includes several uprights 5, with an upper rail 10 connected to the upper end of each upright 5. A roller 14 is installed at the lower end of a traveling seat 9, which is connected to the upper rail 10 via the roller 14. A lower rail 2 is connected to the lower end of each upright 5. Rollers 14 are also installed at the lower ends of several folding rods 11, which are connected to the lower rail 2 via the rollers 14. The folding plate has a foldable structure, consisting of a middle bending section 6, a straight section 8, an edge bending section 7, and a connecting section from the middle to both ends. The folding plate is connected to the traveling seat 9 via the connecting section. The middle bending section 6 and the side bending section 7 are made of soft and flexible material; several fixing seats 12 are provided on both sides of the retractable rod 11, and a through hole is provided in the middle of the fixing seat 12. A bolt is installed in the through hole in a detachable manner, and the retractable rod 11 and the soft cover are connected by bolts; a support frame 13 is connected to the lower end of the upper rail 10, and an air pipe 4 is connected to the support frame 13. Several through holes are provided on the air pipe 4 to connect the inside and outside; a base 1 is fixedly connected to the bottom end of the column 5; it also includes a fixing rod 3, the fixing rod 3 is connected to the column 5 at the far end of the frame, and the side of the fixing rod 3 is connected to the soft cover; it also includes a drive assembly, which includes a motor 17 fixedly installed at the end of the frame, the output shaft of the motor 17 is connected to a rope roller 18, a steel wire rope 19 is wound on the rope roller 18, a fixing ring is provided at the lower end of the crossbar 15 at the far end, and guide rope rings 16 are provided on the other crossbars 15 other than the far end crossbar 15, and the steel wire rope 19 passes through the guide rope rings 16 in sequence and is connected to the fixing ring; the soft cover is connected to the crossbar 15.

[0025] The first embodiment of this utility model is as follows:

[0026] A tail gas recovery device for silicon carbide smelting includes a frame, which includes three columns 5 located at the front, middle and rear ends respectively. The upper end of the column 5 is connected to an upper rail 10, and the lower end of the traveling seat 9 is equipped with rollers 14. The traveling seat 9 is connected to the upper rail 10 through the rollers 14. The lower end of the column 5 is connected to a lower rail 2, and the lower end of several retractable rods 11 is provided with rollers 14. The retractable rods 11 are connected to the lower rail 2 through the rollers 14.

[0027] A furnace hood assembly is foldably mounted on the frame. The furnace hood assembly is covered with a soft cover. The furnace hood assembly includes several traveling seats 9 that are movably mounted on the upper end of the frame. Folding plates are provided between adjacent traveling seats 9 in the longitudinal direction, and crossbars 15 are provided between adjacent traveling seats 9 in the transverse direction. The outer ends of the traveling seats 9 are connected to folding rods 11 for supporting the soft cover, forming a foldable furnace hood that covers the outside of the frame.

[0028] The folding plate has a foldable structure, consisting of a middle bending section 6, a straight plate section 8, an edge bending section 7, and a connecting section from the middle to both ends. The middle bending section 6 and the edge bending section 7 are both downward-convex arc shapes. The folding plate is connected to the traveling seat 9 through the connecting section. The middle bending section 6 and the edge bending section 7 are made of soft and flexible material. When the two ends of the folding plate are subjected to force, the middle bending section 6 will tend to bend downward, causing it to convex upward. The inner end of the straight plate section 8 will rise simultaneously, completing the bending.

[0029] The fixed rod 3 is connected to the column 5 at the far end of the frame. The fixed rod 3 and the retractable rod 11 are connected as one unit by a folding plate. The drive assembly includes a motor 17 fixedly installed at the end of the frame. The output shaft of the motor 17 is connected to a rope roller 18. A steel wire rope 19 is wound on the rope roller 18. A fixing ring is provided at the lower end of the crossbar 15 at the far end. Guide rope rings 16 are provided on the other crossbars 15 besides the far end crossbar 15. The steel wire rope 19 passes through the guide rope rings 16 in sequence and is connected to the fixing ring. When the motor 17 starts, it drives the rope roller 18 to rotate and tightens the steel wire rope 19, thereby driving the far end crossbar 15 to move in the direction of the motor 17. Then, it gradually drives the other adjacent crossbars 15 to move in the same direction.

[0030] To facilitate unfolding, in a general embodiment, manual pulling can be used, which makes it easier to control the unfolding length. In a further embodiment, another set of motors 17 and rope rollers 18 can be set at the other end of the frame and connected to the fixing ring through steel wire ropes 19, so that all the crossbars 15 can be pulled open.

[0031] The side of the fixing rod 3 is connected to the soft cover. Several fixing seats 12 are provided on both sides of the folding rod 11. A through hole is provided in the middle of the fixing seat 12. A bolt is installed in the through hole in a detachable manner. The folding rod 11 and the soft cover are connected by bolts. The connection between the fixing rod 3 and the folding rod 11 and the soft cover facilitates more orderly unfolding and folding.

[0032] The lower end of the upper rail 10 is connected to a support frame 13, and the support frame 13 is connected to an air pipe 4. The air pipe 4 is provided with several through holes that connect the inside and outside of the gas pipe, so as to facilitate the extraction of exhaust gas from inside the furnace hood.

[0033] The bottom of column 5 is fixedly connected to base 1 to improve the stability of the structure.

[0034] It should be noted that the terms "first, second, and third" used in this utility model are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0035] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A tail gas recovery device for silicon carbide smelting, characterized in that: The device includes a frame on which a furnace hood assembly is foldably mounted. The furnace hood assembly is covered with a soft cover. The furnace hood assembly includes several traveling seats that are movably mounted on the upper part of the frame. A folding plate is provided between adjacent traveling seats in the longitudinal direction, and a crossbar is provided between adjacent traveling seats in the transverse direction. The outer ends of the traveling seats are connected to a folding rod for supporting the soft cover.

2. The tail gas recovery equipment for silicon carbide smelting according to claim 1, characterized in that: The frame includes several columns, the upper end of which is connected to an upper rail, and the lower end of the traveling seat is equipped with rollers, which are connected to the upper rail via the rollers.

3. The tail gas recovery equipment for silicon carbide smelting according to claim 2, characterized in that: The lower end of the column is connected to a lower rail, and the lower ends of several of the retractable rods are equipped with rollers, which are connected to the lower rail via the rollers.

4. The tail gas recovery equipment for silicon carbide smelting according to claim 2, characterized in that: The folding plate is a foldable structure, which consists of a middle bending section, a straight plate section, an edge bending section and a connecting section from the middle to both ends. The folding plate is connected to the walking seat through the connecting section. The middle bending section and the edge bending section are made of soft material and are flexible.

5. The tail gas recovery equipment for silicon carbide smelting according to claim 1, characterized in that: Several fixing seats are provided on both sides of the retractable rod, and a through hole is provided in the middle of the fixing seat. A bolt is installed in the through hole in a detachable manner, and the retractable rod and the soft cover are connected by bolts.

6. The tail gas recovery equipment for silicon carbide smelting according to claim 2, characterized in that: The lower end of the upper rail is connected to a support frame, and an air pipe is connected to the support frame. The air pipe has several through holes that allow it to communicate with the inside and outside of the rail.

7. The tail gas recovery equipment for silicon carbide smelting according to claim 2, characterized in that: The bottom end of the column is fixedly connected to a base.

8. The tail gas recovery equipment for silicon carbide smelting according to claim 2, characterized in that: It also includes a fixing rod, which is connected to the column at the far end of the frame, and the side of the fixing rod is connected to the soft cover.

9. The tail gas recovery equipment for silicon carbide smelting according to claim 1, characterized in that: It also includes a drive assembly, which includes a motor fixedly mounted at the end of the frame. The output shaft of the motor is connected to a rope roller, and a steel wire rope is wound on the rope roller. A fixing ring is provided at the lower end of the outermost crossbar, and guide rope rings are provided on the other crossbars other than the outermost crossbar. The steel wire rope passes through the guide rope rings in sequence and is connected to the fixing rings.

10. The tail gas recovery equipment for silicon carbide smelting according to claim 1, characterized in that: The soft cover is connected to the crossbar.

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