Flue gas collection system for silicon carbide production

Abstract

The utility model relates to the technical field of silicon carbide production, especially a flue collecting system for silicon carbide production, including high temperature flue, cooling flue, dust remover and flue gas duct, the high temperature flue is linked with the tapping hole of smelting furnace, the high temperature flue inner wall is laid fire -resistant layer, the high temperature flue is linked with cooling flue, cooling flue is set up vertically, cooling layer is set up in cooling flue outside, be equipped with air inlet and air outlet on cooling layer, be equipped with helical channel on cooling layer inner wall, air inlet is linked with cooling fan, the cooling flue top be equipped with smoke brush, smoke brush and cooling flue inner wall sliding contact, cooling flue bottom and dust removal box are linked with, be equipped with first filter dust board and second filter dust board in dust removal box, first filter dust board and second filter dust board are respectively opposite direction oblique setting, can increase the service life of whole collection system, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide production technology, and in particular to a flue gas collection system for silicon carbide production. Background Technology

[0002] During the production of silicon carbide, especially in the furnace tapping stage, a large amount of high-temperature, highly corrosive dust-laden flue gas is generated. The temperature of this flue gas is extremely high (reaching over 600℃), easily deforming and burning through ordinary metal pipes. Conventional dust collection equipment (such as baghouse dust collectors) cannot withstand such high temperatures, resulting in short system lifespan and high maintenance costs. The high content of coarse dust particles in the flue gas, if directly entering a baghouse dust collector, will rapidly clog the filter bags, increasing system resistance, leading to increased load on the induced draft fan, increased energy consumption, and, after long-term operation, the accumulation of flue gas particles on the inner wall of the pipes, creating safety hazards. Utility Model Content

[0003] The purpose of this application is to provide a flue gas collection system for silicon carbide production, which aims to solve the problems in the prior art.

[0004] This application provides a flue gas collection system for silicon carbide production, including a high-temperature flue, a cooling flue, a dust collector, and an exhaust pipe. The high-temperature flue is connected to the outlet of a smelting furnace, and a refractory layer is laid on the inner wall of the high-temperature flue. The high-temperature flue is connected to the cooling flue, which is vertically arranged. A cooling layer is fitted outside the cooling flue, and the cooling layer has an air inlet and an air outlet. A spiral channel is provided on the inner wall of the cooling layer. The air inlet is connected to a cooler. A smoke removal brush is provided at the top of the cooling flue, and the smoke removal brush slides against the inner wall of the cooling flue. The cooling flue is connected to the bottom of the dust collector box. The dust collector box is equipped with a first dust filter plate and a second dust filter plate. The first dust filter plate and the second dust filter plate are inclined in opposite directions. The first dust filter plate is located above the second dust filter plate. The first dust filter plate is controllably rotatable on the dust collector box. The second dust filter plate is equipped with mounting plates on both sides. The mounting plates are equipped with rubber columns. The bottom of the second dust filter plate is equipped with a spring connecting assembly. The bottom of the dust collector box is connected to the dust collector inlet. The exhaust pipe is connected to the dust collector outlet. An air pump is installed on the exhaust pipe.

[0005] Furthermore, a funnel-shaped smoke collection hood is provided at the furnace outlet, and the refractory layer is made of high-temperature resistant coating.

[0006] Furthermore, the junction of the high-temperature flue and the cooling flue is arranged horizontally, and the smoke removal brush includes a telescopic rod and a bottom brush head, with the outer ring of the brush head in contact with the inner wall of the cooling flue.

[0007] Furthermore, the spring connecting assembly includes an upper connecting block, a compression spring, and a lower connecting plate connected in sequence. The upper connecting block is fixedly connected to the bottom of the second dust filter plate, and the lower connecting plate is fixedly connected to the dust collection box.

[0008] Furthermore, the second dust filter plate has a dust collection port at its inclined bottom end, and a detachable collection box is provided at the dust collection port.

[0009] Furthermore, the first dust filter plate is rotatably mounted inside the dust collection box via a rotating shaft, which is connected to a control motor.

[0010] The beneficial effects of this utility model are as follows: the flue dust generated by the smelting furnace first passes through the high-temperature flue and then flows into the cooling flue. The temperature of the high-temperature flue dust decreases, and it falls into the dust collection box under the action of gravity. After being filtered by two filter plates, the flue dust flows into the dust collector, which effectively reduces the workload of the dust collector. Moreover, the flue dust entering the dust collector is cooled, which can increase the service life of the entire collection system and reduce maintenance costs. At the same time, a smoke removal brush is also set to scrape off the soot on the inner wall of the cooling pipe, preventing the accumulation of soot on the inner wall of the pipe and ensuring the safe operation of the entire system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0013] Figure 3 This is a schematic diagram of the dust collector structure.

[0014] Figure 4 This is a schematic diagram of the structure of the first and second dust filter plates.

[0015] In the picture: 1. Smelting furnace; 11. Fume hood; 2. High-temperature flue; 21. Refractory layer; 3. Cooling flue; 31. Cooling layer; 311. Air inlet; 312. Air outlet; 313. Spiral channel; 4. Smoke brush; 5. Dust collector; 51. First dust filter plate; 511. Rotating shaft; 512. Control motor; 52. Second dust filter plate; 521. Rubber column; 522. Upper connecting block; 523. Compression spring; 524. Lower connecting plate; 53. Collection box; 531. Dust outlet; 6. Dust collector; 7. Exhaust duct; 8. Air pump. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1 to 4 The diagram illustrates a flue gas collection system for silicon carbide production, comprising a high-temperature flue 2, a cooling flue 3, a dust collector 6, and an exhaust pipe 7. The high-temperature flue 2 is connected to the outlet of a smelting furnace 1. A refractory layer 21 is laid on the inner wall of the high-temperature flue 2. The high-temperature flue 2 is connected to the cooling flue 3, which is vertically arranged. A cooling layer 31 is fitted over the cooling flue 3, and the cooling layer 31 has an air inlet 311 and an air outlet 312. A spiral channel 313 is provided on the inner wall of the cooling layer 31. The air inlet 311 is connected to a cooler, and the cool air generated by the cooler enters the spiral channel 313 from the air inlet 311 to cool the cooling flue 3. A smoke removal brush 4 is provided at the top of the cooling flue 3, and the smoke removal brush 4 slides in contact with the inner wall of the cooling flue 3. The bottom of the flue duct 3 is connected to the dust collection box 5. The dust collection box 5 is equipped with a first dust filter plate 51 and a second dust filter plate 52. The first dust filter plate 51 and the second dust filter plate 52 are inclined in opposite directions. The first dust filter plate 51 is located above the second dust filter plate 52. The first dust filter plate 51 is controllably rotatably mounted on the dust collection box 5. The second dust filter plate 52 is equipped with mounting plates on both sides. The mounting plates are equipped with rubber columns 521. The bottom of the second dust filter plate 52 is equipped with a spring connecting assembly. The bottom of the dust collection box 5 is connected to the inlet of the dust collector 6. The exhaust pipe 7 is connected to the outlet of the dust collector 6. The exhaust pipe 7 is equipped with a suction pump 8. The exhaust pipe 6 is connected to an external chimney. Under normal circumstances, the filter mesh of the first dust filter plate 51 is larger than that of the second dust filter plate 52.

[0018] The furnace outlet is equipped with a funnel-shaped smoke collection hood 11, and the refractory layer 21 is made of high-temperature resistant coating to increase the high-temperature resistance of the high-temperature channel 2.

[0019] The high-temperature flue 2 and the cooling flue 3 are connected horizontally. The smoke removal brush 4 includes a telescopic rod and a bottom brush head. The outer ring of the brush head contacts the inner wall of the cooling flue. The telescopic rod can be replaced by a long rod or an electric telescopic rod. A rubber sealing ring is provided between the telescopic rod and the flue. The telescopic rod can slide with the rubber ring. The brush head is moved up and down by controlling the telescopic rod to scrape the inner wall of the cooling flue 4.

[0020] The spring connecting assembly includes an upper connecting block 522, a compression spring 523, and a lower connecting plate 524 connected in sequence. The upper connecting block 522 is fixedly connected to the bottom of the second dust filter plate 52, and the lower connecting plate 524 is fixedly connected to the dust collection box 5.

[0021] The second dust filter plate 52 has a dust collection port 531 at its inclined bottom end. A detachable collection box 53 is provided at the dust collection port 531. The collection box 53 is used to collect the smoke and dust that falls from the second dust filter plate 52.

[0022] The first dust filter plate 51 is rotatably mounted inside the dust collection box 5 via a rotating shaft 511. The rotating shaft 511 is connected to a control motor 512, which is programmed and controlled by an external controller to make the first dust filter plate 51 swing up and down. During the swinging process, the first dust filter plate 51 does not contact the mesh surface of the second dust filter plate 52. When large dust particles are intercepted by the two filter plates, the particles will adhere to the filter mesh. At this time, the first dust filter plate 51 swings downward under the action of the rotating shaft 511, and the first dust filter plate 51 collides with the rubber column 521. The force generated by the collision causes the particles on the first dust filter plate 51 to fall onto the second dust filter plate 52. The second dust filter plate 52, due to the spring connector at the bottom, will also shake under the action of the collision force, causing the dust on the second dust filter plate 52 to fall into the collection box 53 along the inclined filter plate. This allows the dust to be filtered once before entering the dust collector 6, reducing the workload of the dust collector 6.

[0023] The flue gas generated by the smelting furnace 1 first passes through the high-temperature flue 2 and then flows into the cooling flue 3. Under the action of the cold air in the cooling layer 31, the temperature of the high-temperature flue gas drops and falls into the dust collection box 5 under the action of gravity. After being filtered by two filter plates, the flue gas flows into the dust collector 6, which effectively reduces the workload of the dust collector 6. Moreover, the flue gas entering the dust collector 6 is cooled, which can increase the service life of the entire collection system and reduce maintenance costs.

[0024] The above embodiments are not intended to limit the present invention. Unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention is not limited to the examples above. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention. Furthermore, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A flue gas collection system for silicon carbide production, characterized in that, The system includes a high-temperature flue, a cooling flue, a dust collector, and an exhaust duct. The high-temperature flue is connected to the outlet of the smelting furnace, and a refractory layer is laid on the inner wall of the high-temperature flue. The high-temperature flue is connected to the cooling flue, which is vertically arranged and covered with a cooling layer. The cooling layer has an air inlet and an air outlet, and a spiral channel is provided on the inner wall of the cooling layer. The air inlet is connected to a cold air fan. A smoke removal brush is provided at the top of the cooling flue, and the smoke removal brush slides in contact with the inner wall of the cooling flue. The bottom of the cooling flue is connected to the dust collector. The dust collection box is connected to the dust collector. The dust collection box is equipped with a first dust filter plate and a second dust filter plate. The first dust filter plate and the second dust filter plate are inclined in opposite directions. The first dust filter plate is located above the second dust filter plate. The first dust filter plate is controllably rotatably mounted on the dust collection box. The second dust filter plate is equipped with mounting plates on both sides. The mounting plates are equipped with rubber columns. The bottom of the second dust filter plate is equipped with a spring connecting assembly. The bottom of the dust collection box is connected to the dust collector inlet. The exhaust pipe is connected to the dust collector outlet. An air pump is installed on the exhaust pipe.

2. The flue gas collection system for silicon carbide production according to claim 1, characterized in that, The furnace outlet is equipped with a funnel-shaped smoke collection hood, and the refractory layer is made of high-temperature resistant coating.

3. The flue gas collection system for silicon carbide production according to claim 1, characterized in that, The high-temperature flue and the cooling flue are connected horizontally. The smoke removal brush includes a telescopic rod and a bottom brush head, and the outer ring of the brush head is in contact with the inner wall of the cooling flue.

4. The flue gas collection system for silicon carbide production according to claim 1, characterized in that, The spring connecting assembly includes an upper connecting block, a compression spring, and a lower connecting plate connected in sequence. The upper connecting block is fixedly connected to the bottom of the second dust filter plate, and the lower connecting plate is fixedly connected to the dust collection box.

5. The flue gas collection system for silicon carbide production according to claim 4, characterized in that, The second dust filter plate has a dust collection port at its inclined bottom end, and a detachable collection box is provided at the dust collection port.

6. The flue gas collection system for silicon carbide production according to claim 1, characterized in that, The first dust filter plate is rotatably mounted inside the dust collection box via a rotating shaft, which is connected to a control motor.

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