Novel silicon carbide smelting furnace tail gas recovery equipment

Abstract

The utility model discloses novel silicon carbide smelting furnace tail gas recovery equipment, which comprises a base, a cooling treatment cylinder and a recovery tank, the recovery tank is arranged on the surface of the top of the base, the cooling treatment cylinder is arranged on the surface of the top of the base through a support rod, and a plurality of air guide holes are arranged in the cooling treatment cylinder. According to the tail gas collection device, the transverse plate, the electric push rod, the mounting plate, the cleaning rod and the hard brush are arranged and used in cooperation, so that after one-time tail gas collection is completed, a worker opens a sealing cover and then starts the electric push rod, and then the electric push rod drives the cleaning rod to move downwards through the mounting plate, so that the cleaning rod is inserted into the gas guide hole; and in the process that the cleaning rod moves in the gas guide hole, the hard brush makes contact with the inner wall of the gas guide hole, so that the hard brush cleans impurities adsorbed on the inner wall of the gas guide hole, and the mode is easy to operate, facilitates cleaning of the gas guide hole, avoids influences on the heat conduction effect of the gas guide hole, and facilitates subsequent tail gas conveying.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas recovery, in particular to a novel tail gas recovery device for a silicon carbide smelting furnace. Background Art

[0002] Silicon carbide is a man-made material with many excellent properties, such as wear resistance, high temperature resistance, corrosion resistance, high thermal conductivity, high chemical stability, wide band gap and high electron mobility. It is widely used in abrasives, refractory materials, high temperature structural ceramics and other fields. The industrial production of silicon carbide uses quartz sand, petroleum coke, sawdust and salt as raw materials. Its main chemical reaction is: SiO2+3C=SiC+2CO-744.5kJ, which is an endothermic reaction and requires energy for the reaction. Theoretically, the energy consumption for producing 1 kg of silicon carbide is 4491 kcal, which is equivalent to 5.222 degrees of electrical energy. In actual production, due to inevitable energy loss, the actual energy consumption is much greater than this value. At present, there are more than 200 silicon carbide smelting enterprises in China with an annual production capacity of more than 2.2 million tons (including more than 1.2 million tons of green silicon carbide blocks and about 1 million tons of black silicon carbide blocks). The power of smelting transformers is mostly 6300-12500kVA, and the largest smelting transformer is 32000kVA. The gap between China's silicon carbide and the world's advanced level is mainly concentrated in four aspects: first, large-scale mechanical equipment is rarely used in the production process, many processes rely on manpower to complete, and the per capita silicon carbide output is low; second, in the deep-processing products of silicon carbide, the quality management of particle size sand and micro-powder products is not fine enough, and the product quality is not stable enough; third, the performance indicators of some cutting-edge products are somewhat different from those of similar products in developed countries; fourth, carbon monoxide is directly emitted during the smelting process. Major foreign companies have basically achieved closed smelting, while China's silicon carbide smelting is almost all open smelting, and all carbon monoxide is directly discharged.

[0003] Although CO gas is a toxic gas, it is also a gas resource. Every ton of silicon carbide produced will release 1.7 tons of harmful gas, including 1.4 tons of pure CO, 85% of CO+H2 on average, and 90% of CO+H2+CH4 on average. The current treatment method can only be to burn the gas on the surface of the furnace, and only obtain SiC products, which not only pollutes the environment, but also wastes gas resources. If this part of the gas resources can be collected and used reasonably, it will be very beneficial for environmental management, resource recycling and improving the production efficiency of the SiC industry. However, the gas temperature discharged from the smelting furnace is too high and the activity is relatively large. If it is not cooled down and directly recovered, the gas pressure is prone to instability. In addition, the exhaust gas just discharged also contains some burning impurities. If it is not treated, it will affect the later treatment of the exhaust gas.

[0004] To this end, we proposed a new type of silicon carbide smelting furnace tail gas recovery equipment to solve the above-mentioned drawbacks. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a novel tail gas recovery device for silicon carbide smelting furnace.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new type of silicon carbide smelting furnace tail gas recovery equipment, including a base, a cooling treatment cylinder and a recovery tank, the recovery tank is installed on the top surface of the base, the cooling treatment cylinder is installed on the top surface of the base through a support rod, a plurality of air guide holes are opened inside the cooling treatment cylinder, a liquid inlet pipe and a liquid discharge pipe are installed in sequence on the outer surface of the cooling treatment cylinder from top to bottom, a sewage pipe is arranged at the bottom end of the cooling treatment cylinder, and the surface of the sewage pipe is connected with the recovery tank through a conveying pipe.

[0007] Preferably, a horizontal plate is provided on the outer surface of the recovery tank above the cooling treatment cylinder, an electric push rod is vertically installed on the top surface of the horizontal plate, the output end of the electric push rod passes through the surface of the horizontal plate and is connected to a mounting plate, a cleaning rod is vertically installed at the bottom end of the mounting plate, and a hard brush is provided on the outer surface of the cleaning rod.

[0008] Preferably, a plurality of air guide holes are provided, and the plurality of air guide holes are equidistantly arranged around the cooling treatment cylinder.

[0009] Preferably, a sealing cover is spirally connected to the top of the cooling treatment cylinder.

[0010] Preferably, the length of the cleaning rod is equal to the depth of the air guide hole.

[0011] Preferably, a sewage cover is spirally connected to the bottom end of the sewage pipe, and a transparent observation window is installed on the outer surface of the sewage pipe.

[0012] Preferably, a controller is installed on the outer surface of the cooling treatment cylinder.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) The utility model is convenient for cooling the tail gas when recovering the tail gas from the smelting furnace by setting a cooling treatment cylinder, an air guide hole, a liquid inlet pipe and a liquid outlet pipe. During operation, the tail gas outlet of the smelting furnace is connected to the air inlet at the top of the sealing cover. Then the staff injects the external cooling liquid into the cooling treatment cylinder through the liquid inlet pipe, and then the tail gas enters the cooling treatment cylinder through the air inlet. Then the tail gas is transported through each air guide hole. During the transportation process, the cooling liquid in the cooling treatment cylinder cools the tail gas through the air guide hole. This method is simple to operate, convenient for reducing the activity of the tail gas, and ensures In order to ensure the stability of the exhaust gas inside the recovery tank, a horizontal plate, an electric push rod, a mounting plate, a cleaning rod and a hard brush are used in coordination. After the exhaust gas is collected once, the staff opens the sealing cover and then starts the electric push rod. The electric push rod then drives the cleaning rod to move downward through the mounting plate, so that the cleaning rod is inserted into the air guide hole. During the movement of the cleaning rod inside the air guide hole, the hard brush contacts the inner wall of the air guide hole, so that the hard brush cleans away the impurities adsorbed on the inner wall of the air guide hole. This method is simple to operate, convenient for cleaning the air guide hole, avoids affecting the heat conduction effect of the air guide hole, and facilitates the subsequent transportation of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the structure of a novel tail gas recovery device for silicon carbide smelting furnace proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the interior of a new type of silicon carbide smelting furnace tail gas recovery equipment cooling treatment cylinder proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the gas guide holes of a novel tail gas recovery device for silicon carbide smelting furnace proposed by the utility model;

[0019] Figure 4 The utility model provides a schematic diagram of a new type of hard brush for silicon carbide smelting furnace tail gas recovery equipment.

[0020] Legend:

[0021] 1. Base; 2. Recovery tank; 3. Horizontal plate; 4. Sealing cover; 5. Cooling treatment cylinder; 6. Controller; 7. Support rod; 8. Hard brush; 9. Liquid inlet pipe; 10. Liquid discharge pipe; 11. Air guide hole; 12. Drain pipe; 13. Drain cover; 14. Electric push rod; 15. Mounting plate; 16. Cleaning rod. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0023] Please refer to Figure 1-4 A novel tail gas recovery device for a silicon carbide smelting furnace comprises a base 1, a cooling treatment cylinder 5 and a recovery tank 2, wherein the recovery tank 2 is mounted on the top surface of the base 1, and the cooling treatment cylinder 5 is mounted on the top surface of the base 1 through a support rod 7, and a plurality of air guide holes 11 are provided inside the cooling treatment cylinder 5, and a liquid inlet pipe 9 and a liquid discharge pipe 10 are sequentially installed on the outer surface of the cooling treatment cylinder 5 from top to bottom, and a sewage pipe 12 is arranged at the bottom end of the cooling treatment cylinder 5, and the surface of the sewage pipe 12 is connected to the recovery tank 2 through a conveying pipe.

[0024] In the present embodiment: by setting up the cooling treatment cylinder 5, the air guide holes 11, the liquid inlet pipe 9 and the liquid outlet pipe for coordinated use, it is convenient to cool the tail gas when recovering the tail gas from the smelting furnace, so that during operation, the tail gas outlet of the smelting furnace is connected to the air inlet at the top of the sealing cover 4, and then the staff injects the external cooling liquid into the cooling treatment cylinder 5 through the liquid inlet pipe 9, and then the tail gas enters the cooling treatment cylinder 5 through the air inlet, and then the tail gas is transported through each air guide hole 11. During the transportation process, the cooling liquid inside the cooling treatment cylinder 5 cools the tail gas through the air guide holes 11. This method is simple to operate, is convenient for reducing the activity of the tail gas, and ensures the stability of the tail gas inside the recovery tank 2.

[0025] Specifically, a horizontal plate 3 is provided on the outer surface of the recovery tank 2 above the cooling treatment cylinder 5, an electric push rod 14 is vertically installed on the top surface of the horizontal plate 3, the output end of the electric push rod 14 passes through the surface of the horizontal plate 3 and is connected to a mounting plate 15, a cleaning rod 16 is vertically installed at the bottom end of the mounting plate 15, and a hard brush 8 is provided on the outer surface of the cleaning rod 16.

[0026] In the present embodiment: by setting the cross plate 3, the electric push rod 14, the mounting plate 15, the cleaning rod 16 and the hard brush 8 for coordinated use, after the exhaust gas is collected once, the staff opens the sealing cover 4, and then starts the electric push rod 14, and then the electric push rod 14 drives the cleaning rod 16 to move downward through the mounting plate 15, so that the cleaning rod 16 is inserted into the air guide hole 11. During the movement of the cleaning rod 16 inside the air guide hole 11, the hard brush 8 contacts the inner wall of the air guide hole 11, so that the hard brush 8 cleans away the impurities adsorbed on the inner wall of the air guide hole 11. This method is simple to operate, is convenient for cleaning the air guide hole 11, avoids affecting the heat conduction effect of the air guide hole 11, and is convenient for the subsequent transportation of exhaust gas.

[0027] Specifically, a plurality of air guide holes 11 are provided, and the plurality of air guide holes 11 are equidistantly arranged around the cooling treatment tube 5 .

[0028] In this embodiment: by providing a plurality of air guide holes 11, the gas can enter the plurality of air guide holes 11 for transmission, thereby increasing the area of ​​gas flow within a certain space, so that the coolant inside the cooling treatment tube 5 can quickly cool the gas inside the air guide holes 11.

[0029] Specifically, a sealing cover 4 is spirally connected to the top of the cooling treatment cylinder 5 .

[0030] In this embodiment: by providing a sealing cover 4, it is convenient to seal the cooling treatment cylinder 5, so that when it is necessary to clean the inside of the air guide hole 11, the sealing cover 4 is opened to expose the air guide hole 11. It should be noted that an air inlet is provided at the top of the sealing cover 4.

[0031] Specifically, the length of the cleaning rod 16 is equal to the depth of the air guide hole 11 .

[0032] In this embodiment, by setting the length of the cleaning rod 16 to be equal to the depth of the air guide hole 11 , the hard brush 8 can be used to clean the impurities collected on the inner wall of the air guide hole 11 .

[0033] Specifically, a sewage cover 13 is spirally connected to the bottom end of the sewage pipe 12 , and a transparent observation window is installed on the outer surface of the sewage pipe 12 .

[0034] In this embodiment, by setting a sewage cover 13, after the work is completed, it is possible to observe through the transparent observation window whether the impurities inside the sewage pipe 12 exceed the conveying pipe. When it exceeds the conveying pipe, the sewage cover 13 is rotated down to discharge the impurities collected inside the sewage pipe 12.

[0035] Specifically, a controller 6 is installed on the outer surface of the cooling treatment cylinder 5 .

[0036] In this implementation scheme: by setting up a controller 6, it is convenient to control the electrical components inside the device. The control circuit of the controller 6 can be realized by simple programming by technicians in this field. It belongs to the common knowledge in this field. It is only used without modification, so the control method and circuit connection will not be described in detail.

[0037] Working principle: During operation, the tail gas outlet of the smelting furnace is connected to the air inlet at the top of the sealing cover 4, and then the staff injects the external coolant into the cooling treatment cylinder 5 through the liquid inlet pipe 9, and then the tail gas enters the cooling treatment cylinder 5 through the air inlet, and then the tail gas is transported through each air guide hole 11. During the transportation process, the coolant inside the cooling treatment cylinder 5 cools the tail gas through the air guide hole 11. This method is simple to operate, easy to reduce the activity of the tail gas, and ensures the stability of the tail gas inside the recovery tank 2. By setting the horizontal plate 3, the electric push rod 14, the mounting plate 15, the cleaning rod 16 and The use of the hard brush 8 allows the staff to open the sealing cover 4 after the exhaust gas is collected once, and then start the electric push rod 14. The electric push rod 14 then drives the cleaning rod 16 to move downward through the mounting plate 15, so that the cleaning rod 16 is inserted into the air guide hole 11. During the movement of the cleaning rod 16 inside the air guide hole 11, the hard brush 8 contacts the inner wall of the air guide hole 11, so that the hard brush 8 cleans away the impurities adsorbed on the inner wall of the air guide hole 11. This method is simple to operate, convenient for cleaning the air guide hole 11, avoids affecting the heat conduction effect of the air guide hole 11, and facilitates the subsequent transportation of exhaust gas.

[0038] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A novel tail gas recovery device for silicon carbide smelting furnace, comprising a base (1), a cooling treatment cylinder (5) and a recovery tank (2), characterized in that: The recovery tank (2) is mounted on the top surface of the base (1); the cooling treatment cylinder (5) is mounted on the top surface of the base (1) via a support rod (7); a plurality of air guide holes (11) are provided inside the cooling treatment cylinder (5); a liquid inlet pipe (9) and a liquid discharge pipe (10) are sequentially installed on the outer surface of the cooling treatment cylinder (5) from top to bottom; a sewage discharge pipe (12) is provided at the bottom end of the cooling treatment cylinder (5); and the surface of the sewage discharge pipe (12) is connected to the recovery tank (2) via a conveying pipe.

2. The novel silicon carbide smelting furnace tail gas recovery equipment according to claim 1 is characterized in that: A horizontal plate (3) is arranged on the outer surface of the recovery tank (2) above the cooling treatment cylinder (5); an electric push rod (14) is vertically mounted on the top surface of the horizontal plate (3); the output end of the electric push rod (14) passes through the surface of the horizontal plate (3) and is connected to a mounting plate (15); a cleaning rod (16) is vertically mounted on the bottom end of the mounting plate (15); and a hard brush (8) is arranged on the outer surface of the cleaning rod (16).

3. The novel silicon carbide smelting furnace tail gas recovery equipment according to claim 1 is characterized in that: A plurality of air guide holes (11) are provided, and the plurality of air guide holes (11) are arranged at equal distances and surround the interior of the cooling treatment cylinder (5).

4. The novel silicon carbide smelting furnace tail gas recovery equipment according to claim 1 is characterized in that: The top end of the cooling treatment cylinder (5) is spirally connected with a sealing cover (4).

5. The novel silicon carbide smelting furnace tail gas recovery equipment according to claim 2 is characterized in that: The length of the cleaning rod (16) is equal to the depth of the air guide hole (11).

6. The novel silicon carbide smelting furnace tail gas recovery equipment according to claim 1 is characterized in that: The bottom end of the sewage discharge pipe (12) is spirally connected to a sewage discharge cover (13), and the outer surface of the sewage discharge pipe (12) is provided with a transparent observation window.

7. The novel silicon carbide smelting furnace tail gas recovery equipment according to claim 1 is characterized in that: A controller (6) is installed on the outer surface of the temperature reduction treatment cylinder (5).

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