A high-efficiency reactor for silicon carbide smelting

Abstract

This utility model relates to the field of silicon carbide production technology and discloses a high-efficiency reactor for silicon carbide smelting, including a reactor and a feed pipe fixedly connected to the top of the reactor. Heating pipes are installed on the outer surface of the reactor. A tail gas treatment mechanism is provided on the right side of the reactor. The tail gas treatment mechanism includes an inlet box, a cylinder, a piston, a first vent pipe, a first check valve, a purification box, a purification filter element, a second vent pipe, a double-way valve, a cleaning pipe, a third vent pipe, and a third check valve. This high-efficiency reactor for silicon carbide smelting employs a multi-stage purification process through the tail gas treatment mechanism. First, the composite purification filter element in the purification box filters out 1-5μm dust particles in the tail gas and preliminarily adsorbs organic harmful gases. Then, the tail gas entering the adsorption box is fully contacted by the purification liquid atomized by the spray ring nozzles, which neutralizes acidic harmful gases such as sulfides in the tail gas. Furthermore, the gas-liquid separation layer in the adsorption box prevents the purification liquid from escaping with the tail gas.

Description

Technical Field

[0001] This utility model belongs to the field of silicon carbide production technology, specifically, it relates to a high-efficiency reaction furnace for silicon carbide smelting. Background Technology

[0002] In the field of silicon carbide production, the reactor is the core equipment for the high-temperature smelting reaction of raw materials such as quartz sand and coke to produce silicon carbide. With the expanding application demands of silicon carbide in semiconductors, wear-resistant materials, and new energy fields, the requirements for silicon carbide smelting efficiency and the environmental friendliness of the production process are increasing. However, numerous problems exist in the tail gas treatment stage of existing silicon carbide smelting reactors, which have become key bottlenecks restricting the industry's development. These problems are specifically manifested in the following aspects: Existing silicon carbide smelting reactors continuously generate tail gas containing large amounts of dust, such as unreacted quartz sand particles and coke powder, as well as harmful gases such as sulfides and nitrogen oxides during the high-temperature smelting process. Current mainstream reactor tail gas treatment methods generally suffer from incomplete collection; most equipment only collects tail gas through a single exhaust port on the furnace top or a local ventilation structure, failing to cover different height areas within the furnace. This results in some tail gas accumulating inside the furnace and escaping through furnace gaps, polluting the workshop working environment and posing a threat to the respiratory health of operators. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency reactor for silicon carbide smelting to solve the problems mentioned in the background art.

[0004] A high-efficiency reactor for silicon carbide smelting includes a reactor and a feed pipe fixedly connected to the top of the reactor. Heating pipes are installed on the outer surface of the reactor, and a tail gas treatment mechanism is provided on the right side of the reactor.

[0005] The exhaust gas treatment mechanism includes an intake box, a cylinder, a piston, a first ventilation pipe, a first check valve, a purification box, a purification filter element, a second ventilation pipe, a double-way valve, a cleaning pipe, a third ventilation pipe, and a third check valve. The intake box is fixedly installed in the middle right side of the reactor. The cylinder is fixedly installed in the bottom right side of the reactor. The piston is connected to the output end of the cylinder. The first ventilation pipe is fixedly connected to the top of the intake box. The second ventilation pipe is fixedly connected to the top of the first ventilation pipe. The cleaning pipe is fixedly connected to the bottom of the second ventilation pipe. The third ventilation pipe is fixedly connected to the right side of the cleaning pipe. The first check valve is installed at the connection between the first and second ventilation pipes. The double-way valve is installed at the connection between the second ventilation pipe and the cleaning pipe. The third check valve is installed on the third ventilation pipe.

[0006] In a preferred embodiment of this utility model, the purification box is fixedly connected to the right side of the second ventilation pipe, the purification filter element is slidably connected to the inside of the purification box, a pull rod is fixedly connected to the right side of the purification filter element, and a drain pipe is fixedly connected to the side of the second ventilation pipe.

[0007] In a preferred embodiment of this utility model, the piston is slidably connected to the inside of the air intake box, the one-way valve one only allows gas to enter the air intake pipe two from the air intake pipe one, and the one-way valve three only allows gas to enter the air intake pipe three from the cleaning pipe.

[0008] In a preferred embodiment of this utility model, a support frame is fixedly connected to the bottom of the reactor, a motor is fixedly installed at the center of the top of the reactor, a rotating shaft is connected to the output end of the motor, a dispersing rod is fixedly connected to the outer surface of the rotating shaft, a first ventilation ring is fixedly connected to the middle of the inner wall of the reactor, a suction nozzle is fixedly connected to the side of the first ventilation ring, a connecting pipe is fixedly connected to the top of the first ventilation ring, a second ventilation ring is fixedly connected to the top of the connecting pipe, the second ventilation ring is fixedly connected to the inner wall of the reactor near the top, and the second ventilation ring is connected to the left end of the second ventilation pipe.

[0009] In a preferred embodiment of this utility model, a booster pump is provided on the right side of the reactor, the output end of the booster pump is connected to a reflux tank, the input end of the booster pump is connected to a water inlet pipe, and the reflux tank is connected to the bottom of the cleaning pipe.

[0010] In a preferred embodiment of this utility model, the end of the vent pipe furthest from the cleaning pipe is connected to an adsorption box, a purification liquid tank is fixedly installed on the top of the adsorption box, an inlet pipe is fixedly connected to the top of the purification liquid tank, and a spray pump is installed on the side of the purification liquid tank.

[0011] In a preferred embodiment of this utility model, a spray ring is fixedly connected to the inner wall of the adsorption box near the top, a nozzle is fixedly connected to the side of the spray ring, and an exhaust pipe is fixedly connected to the bottom side of the adsorption box.

[0012] Compared with the prior art, the present invention has the following advantages: 1. This high-efficiency reactor for silicon carbide smelting employs a multi-stage purification process through its exhaust gas treatment mechanism. First, the exhaust gas passes through a composite purification filter element in the purification chamber, which can filter dust particles of 1-5μm and preliminarily adsorb organic harmful gases. Then, the exhaust gas entering the adsorption chamber is fully contacted by the purification liquid atomized by the spray ring nozzles, which can neutralize acidic harmful gases such as sulfides in the exhaust gas. Furthermore, the gas-liquid separation layer in the adsorption chamber can prevent the purification liquid from escaping with the exhaust gas.

[0013] 2. This high-efficiency reactor for silicon carbide smelting uses a pressurized conveying structure composed of an inlet box, cylinder, and piston. The reciprocating motion of the piston creates negative pressure and pressurized circulation. Combined with the directional conduction design of one-way valve one and one-way valve three, it can prevent tail gas backflow and ensure stable delivery of tail gas in the ventilation pipeline. This avoids the problems of pressure fluctuation and tail gas leakage that are prone to occur, and improves the sealing and stability of tail gas delivery.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 3 This is a schematic diagram of the internal structure of the reactor of this utility model; Figure 4 This is a structural breakdown diagram of the exhaust gas treatment mechanism of this utility model; Figure 5 This is a schematic diagram of the internal structure of the adsorption box of this utility model.

[0016] In the diagram: 1. Reactor; 2. Feed pipe; 3. Heating pipe; 4. Support frame; 5. Motor; 501. Rotating shaft; 502. Dispersing rod; 503. Vent ring one; 504. Connecting pipe; 505. Vent ring two; 506. Suction nozzle; 6. Booster pump; 601. Reverse flow box; 602. Water inlet pipe; 7. Air inlet box; 701. Cylinder; 702. Piston; 703. Vent pipe one; 704. 705. One-way valve; 706. Purification box; 707. Purification filter element; 708. Pull rod; 709. Vent pipe 2; 710. Two-way valve; 711. Cleaning pipe; 712. Vent pipe 3; 713. One-way valve 3; 714. Sewage pipe; 805. Adsorption box; 806. Exhaust pipe; 807. Purification liquid tank; 808. Spray pump; 809. Inlet pipe; 8000. Spray ring; 8001. Nozzle. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0018] Example 1 To address the problem of inconvenient treatment of exhaust gases generated by silicon carbide smelting reactors in existing technologies, such as... Figures 1 to 5As shown, a high-efficiency reactor for silicon carbide smelting includes a reactor 1 and a feed pipe 2 fixedly connected to the top of the reactor 1. A heating pipe 3 is installed on the outer surface of the reactor 1. The outer wall of the reactor 1 needs to be wrapped with a high-temperature resistant insulation layer. A metal protective shell is then installed outside the insulation layer to prevent personnel from being burned by contact. A tail gas treatment mechanism is provided on the right side of the reactor 1.

[0019] The exhaust gas treatment mechanism includes an intake box 7, a cylinder 701, a piston 702, a first ventilation pipe 703, a first check valve 704, a purification box 705, a purification filter element 706, a second ventilation pipe 708, a two-way valve 709, a cleaning pipe 710, a third ventilation pipe 711, and a third check valve 712. The intake box 7 is fixedly installed in the middle of the right side of the reactor 1. The cylinder 701 is fixedly installed in the bottom right side of the reactor 1. The piston 702 is connected to the output end of the cylinder 701. The first ventilation pipe 703 is fixedly connected to the top of the intake box 7. The second ventilation pipe 708 is fixedly connected to the top of the first ventilation pipe 703. The cleaning pipe 710 is fixedly connected to the bottom of the second ventilation pipe 708. The third ventilation pipe 711 is fixedly connected to the right side of the cleaning pipe 710. The one-way valve... A valve 704 is installed at the connection between vent pipe 703 and vent pipe 708; a two-way valve 709 is installed at the connection between vent pipe 708 and cleaning pipe 710; a one-way valve 712 is installed on vent pipe 711; a drain pipe 713 is fixedly connected to the side of vent pipe 708; a purification box 705 is fixedly connected to the right side of vent pipe 708; a purification filter element 706 is slidably connected to the inside of purification box 705; a pull rod 707 is fixedly connected to the right side of purification filter element 706; a piston 702 is slidably and sealingly connected to the inside of air inlet box 7; a one-way valve 704 only allows gas to enter vent pipe 708 from vent pipe 703; a one-way valve 712 only allows gas to enter vent pipe 711 from cleaning pipe 710.

[0020] A support frame 4 is fixedly connected to the bottom of the reactor 1. A motor 5 is fixedly installed at the center of the top of the reactor 1. The output end of the motor 5 is connected to a rotating shaft 501. A dispersing rod 502 is fixedly connected to the outer surface of the rotating shaft 501. A ventilation ring 503 is fixedly connected to the middle of the inner wall of the reactor 1. A suction nozzle 506 is fixedly connected to the side of the ventilation ring 503. A connecting pipe 504 is fixedly connected to the top of the ventilation ring 503. A ventilation ring 505 is fixedly connected to the top of the connecting pipe 504. The ventilation ring 505 is fixedly connected to the inner wall of the reactor 1 near the top. The ventilation ring 505 is connected to the left end of the ventilation pipe 708. A booster pump 6 is installed on the right side of the reactor 1. A backflow box 601 is connected to the output end of the booster pump 6. A water inlet pipe 602 is connected to the input end of the booster pump 6. The backflow box 601 is connected to the bottom of the cleaning pipe 710.

[0021] Both the first ventilation ring (503) and the second ventilation ring (505) are made of stainless steel round tubes. The tube diameter is determined according to the exhaust gas emission volume. Typically, the diameter of the first ventilation ring (503) is 50-80 mm, and the diameter of the second ventilation ring (505) is 40-60 mm. Vent holes are evenly distributed around the circumference of the ventilation rings, with a diameter of 5-8 mm. The number of vent holes is determined according to the diameter of the ventilation ring to ensure that the exhaust gas collection volume per unit time matches the exhaust gas generation volume of reactor 1.

[0022] The suction nozzle 506 adopts a flared structure, is made of high-temperature resistant ceramic, has a flared diameter of 15-20mm, and a length of 30-40mm. The suction nozzle 506 is connected to the ventilation ring 503 via a threaded connection for easy replacement in case of damage. The suction nozzle 506 is installed at a 30-45° downward angle radially relative to the ventilation ring 503, effectively preventing raw material particles from entering the suction nozzle 506 and causing blockage.

[0023] Booster pump 6 is a stainless steel centrifugal pump with a flow rate of 5-10 m³ / h. 3 With a pump head of 30-50m and a flow rate of / h, it is suitable for clean water delivery. The pump motor has an IP54 protection rating, providing some dust and water resistance, and is adaptable to the working environment surrounding the reactor. Pressure gauges and check valves must be installed on the inlet and outlet pipes of booster pump 6. The pressure gauges are used to monitor the pump's operating pressure, and the check valves prevent clean water from flowing back into the inlet pipe 602.

[0024] The 803 spray pump is a corrosion-resistant centrifugal pump made of fluoroplastic alloy, suitable for conveying acidic or alkaline purification solutions, with a flow rate of 3-8 m³ / h. 3 / h, with a head of 20-35m. A pressure regulating valve needs to be installed between the outlet pipe of the spray pump 803 and the spray ring 805 to control the spray pressure at 0.3-0.5MPa, ensuring that the purified liquid sprayed from the nozzle 806 is atomized with a particle diameter of 50-100μm, thereby increasing the gas-liquid contact area.

[0025] The 706 purification filter element uses a composite filter material, consisting of an inner layer of glass fiber filter cloth, a middle layer of activated carbon filter mesh, and an outer layer of high-temperature resistant non-woven fabric. These three layers are bonded together using a high-temperature bonding process. The filter element has a filtration accuracy of 1-5μm, effectively filtering dust particles in exhaust gas. The activated carbon filter mesh has an iodine adsorption value of no less than 1000mg / g, capable of initially adsorbing some of the organic harmful gases in the exhaust gas. The external dimensions of the 706 purification filter element must match the internal sliding groove of the 705 purification chamber. Taking a common 705 purification chamber as an example, the preferred filter element diameter is 80-100mm, and the length is 300-400mm. Sealing rubber rings are installed at both ends of the filter element to ensure that the exhaust gas passes completely through the filter element without bypassing.

[0026] After the purification filter element 706 has been used for a period of time, it can be pulled out of the purification box 705 by pulling the lever 707 on the right side of the purification box 705 for replacement or cleaning and reinstallation to ensure the filtration effect. When the purification liquid in the purification liquid tank 802 is insufficient, the purification liquid can be added through the liquid inlet pipe 804 to ensure the continuous operation of the spray adsorption process.

[0027] The drain pipe 713, which is fixedly connected to the side of the second vent pipe 708, is preferably installed in the area between the lower part of the purification box 705 and the upper part of the double-way valve 709. This location can maximize the discharge of impurities settled in the second vent pipe 708 and the wastewater after flushing. The connection method adopts welding sealing to ensure that there is no air or water leakage at the connection with the second vent pipe 708, and the diameter of the drain pipe 713 should not be less than 1 / 3 of the diameter of the second vent pipe 708 to ensure smooth sewage discharge.

[0028] A shut-off valve is installed on the drain pipe 713 to control the start and stop of the drain operation and prevent exhaust gas from leaking from the drain pipe 713 during normal smelting. The shut-off valve must meet the requirements of high temperature resistance and corrosion resistance and be suitable for the working environment during the exhaust gas treatment process. At the same time, the end of the drain pipe 713 is equipped with a detachable drain connector for easy connection to the drain pipe or collection container to prevent sewage from being discharged indiscriminately and causing pollution.

[0029] The heating tubes 3 of reactor 1 are made of high-temperature resistant alloy materials such as nickel-chromium alloy. The power of a single heating tube 3 is determined according to the volume of reactor 1, with a capacity of 10m³. 3 Taking the reactor as an example, the power of a single heating tube is preferably 15-20kW, and the surface of the heating tube 3 needs to be treated with an anti-oxidation coating to extend its service life. The number of heating tubes 3 needs to be evenly distributed to ensure a uniform temperature field inside the reactor 1. Usually, one tube is installed every 30-45° along the circumference of the inner wall of the reactor 1, and they are arranged in two layers, with the upper layer close to the middle of the reactor 1 and the lower layer close to the bottom of the furnace.

[0030] The heating tube 3 is fixed to the side wall of the reactor 1 via a flange connection. A high-temperature resistant sealing gasket is installed between the flange and the outer wall of the reactor 1 to prevent leakage of high-temperature gas inside the furnace. The length of the heating tube 3 extending into the reactor 1 must be controlled between 1 / 2 and 2 / 3 of the furnace radius to avoid interference with the rotating shaft 501 and the dispersing rod 502, while ensuring that heat can be effectively transferred to the raw material area inside the furnace.

[0031] Inside the adsorption box 8, below the spray ring 805, there is a gas-liquid separation layer. This layer uses multi-layer stainless steel corrugated packing, with a packing layer height of 1 / 3 to 1 / 2 of the height of the adsorption box 8. This layer can intercept the mist-like purification liquid carried in the exhaust gas, preventing the purification liquid from being discharged from the exhaust pipe 801 with the exhaust gas. It also prolongs the residence time of the exhaust gas in the adsorption box 8, thus improving the purification effect.

[0032] The bottom of the adsorption tank 8 is equipped with a sloping liquid collection ramp with an inclination of 5-10°. The lowest point is connected to a drain pipe, which is equipped with a level control valve. When the purified liquid level in the adsorption tank 8 reaches the set height, the valve automatically opens to discharge the waste liquid. At the same time, a level gauge is installed on the side wall of the adsorption tank 8 to display the liquid level in real time, facilitating monitoring and manual control of the drain discharge by the operator.

[0033] Pre-use commissioning of the reactor: The reactor 1 is placed stably using the support frame 4 fixedly connected to the bottom to ensure the stability of the equipment during operation. A feed pipe 2 is fixedly installed on the top of the reactor 1 for feeding silicon carbide smelting raw materials into the furnace. A motor 5 is fixedly installed at the center of the top, and the output end of the motor 5 passes through the top of the reactor 1 and is connected to a rotating shaft 501. Multiple sets of dispersing rods 502 are evenly fixedly connected to the outer surface of the rotating shaft 501 inside the reactor 1. The dispersing rods 502 must be kept horizontal and symmetrically distributed to ensure the dispersion effect of the raw materials.

[0034] A ventilation ring 503 is fixedly connected to the middle of the inner wall of reactor 1. Installation holes are evenly spaced on the side of the ventilation ring 503, and suction nozzles 506 are fixed one-to-one in these holes, ensuring that the openings of the suction nozzles 506 face inwards towards the inside of reactor 1 for efficient intake of exhaust gas. A connecting pipe 504 is welded to the top of the ventilation ring 503, and the top of the connecting pipe 504 is fixedly connected to a second ventilation ring 505. The second ventilation ring 505 is fixed to the inner wall of reactor 1 near the top, and one end of the second ventilation ring 505 must be sealed and connected to the left end of the second ventilation pipe 708 of the subsequent exhaust gas treatment mechanism.

[0035] An inlet box 7 is fixedly installed in the middle of the right side of the reactor 1, and a cylinder 701 is fixedly installed at the bottom of the right side. The output end of the cylinder 701 is fixedly connected to the piston 702, and the piston 702 must be sealed and slidably connected inside the inlet box 7 to ensure the sealing during gas transportation. A vent pipe 703 is welded to the top of the inlet box 7. The top of the vent pipe 703 is sealed to the vent pipe 708. A one-way valve 704 is installed at the connection, and the conduction direction of the one-way valve 704 is set to allow gas to enter the vent pipe 708 only from the vent pipe 703.

[0036] A purification chamber 705 is welded to the right side of vent pipe 2 708. A sliding groove is pre-drilled inside the purification chamber 705 to allow the purification filter element 706 to slide within it. A pull rod 707 is fixedly connected to the right side of the purification filter element 706, penetrating the right side wall of the purification chamber 705 for easy removal of the purification filter element 706 for replacement or cleaning. A cleaning pipe 710 is welded to the bottom of vent pipe 2 708, with a two-way valve 709 installed at the connection to control the flow between vent pipe 2 708 and the cleaning pipe 710. A third vent pipe 711 is welded to the right side of the cleaning pipe 710, with a one-way valve 712 installed on it. The flow direction is set to allow only gas to enter the third vent pipe 711 from the cleaning pipe 710.

[0037] A booster pump 6 is installed on the right side of the reactor 1. The input end of the booster pump 6 is connected to the water inlet pipe 602 for accessing a clean water source; the output end is connected to the reflux box 601. The top of the reflux box 601 is sealed and connected to the bottom of the cleaning pipe 710 to realize the delivery of clean water to the cleaning pipe 710.

[0038] An adsorption box 8 is welded to the end of the ventilation pipe 711 furthest from the cleaning pipe 710. A purified liquid tank 802 is fixedly installed on the top of the adsorption box 8. An inlet pipe 804 is welded to the top of the purified liquid tank 802 for adding exhaust gas purified liquid. A spray pump 803 is installed on the side. The input end of the spray pump 803 extends into the bottom of the purified liquid tank 802, and the output end is connected to the spray ring 805 near the top of the inner wall of the adsorption box 8 through a pipe. Nozzles 806 are evenly installed on the side of the spray ring 805, with the openings of the nozzles 806 facing the lower interior of the adsorption box 8. An exhaust pipe 801 is welded to the bottom side of the adsorption box 8 for discharging the treated clean gas.

[0039] Introduce a small amount of compressed air into reactor 1, close all valves, and observe whether there is any air leakage at the connection points of reactor 1, ventilation ring 1 503, ventilation ring 2 505, each ventilation pipe and adsorption box 8. If there is any air leakage, it needs to be resealed.

[0040] Start motor 5 and observe whether the rotating shaft 501 and the dispersing rod 502 operate smoothly without jamming or abnormal noise; start cylinder 701 and check whether the piston 702 slides smoothly in the air inlet box 7, and whether the opening and closing status of one-way valve 704, two-way valve 709, and one-way valve 712 is normal; start booster pump 6 and check whether the cleaning water can smoothly pass through backflow box 601 into cleaning pipe 710; start spray pump 803 and confirm whether the purified liquid can be evenly sprayed through spray ring 805 and nozzle 806.

[0041] Example 2 To further enhance the treatment effect of exhaust gas, the end of the ventilation pipe 711 away from the cleaning pipe 710 is connected to an adsorption box 8. A purification liquid tank 802 is fixedly installed on the top of the adsorption box 8. An inlet pipe 804 is fixedly connected to the top of the purification liquid tank 802. A spray pump 803 is installed on the side of the purification liquid tank 802. A spray ring 805 is fixedly connected to the inner wall of the adsorption box 8 near the top. A nozzle 806 is fixedly connected to the side of the spray ring 805. An exhaust pipe 801 is fixedly connected to the bottom side of the adsorption box 8.

[0042] Working principle: The raw materials required for silicon carbide smelting are fed into the reactor 1 through the feed pipe 2. The motor 5 is started, and the motor 5 drives the rotating shaft 501 and the dispersing rod 502 to rotate at high speed. The dispersing rod 502 fully stirs and disperses the raw materials, avoiding the accumulation of raw materials and causing uneven smelting. At the same time, a high-temperature smelting reaction takes place in the reactor 1 to produce silicon carbide products. During the process, exhaust gas containing dust and harmful gases such as carbon monoxide and sulfides is generated.

[0043] The exhaust gas generated during smelting diffuses within the reactor 1. Under the negative pressure of the subsequent gas conveying mechanism, the suction nozzle 506 on the side of the ventilation ring 503 draws the exhaust gas from the middle and lower regions of the reactor 1 into the ventilation ring 503. Simultaneously, some of the upper exhaust gas directly enters the second ventilation ring 505. The exhaust gas collected by the two ventilation rings converges through the connecting pipe 504 and then enters the second ventilation pipe 708, which is connected to the second ventilation ring 505, thus completing the initial collection and conveying of the exhaust gas.

[0044] The cylinder 701 is activated, driving the piston 702 to reciprocate within the intake chamber 7. When the piston 702 moves downward, a negative pressure is created within the intake chamber 7, drawing exhaust gas from the second vent pipe 708 into the intake chamber 7 through the first vent pipe 703 and the first check valve 704. When the piston 702 moves upward, the pressure within the intake chamber 7 increases, forcing the exhaust gas back into the second vent pipe 708, thus achieving pressurized delivery of the exhaust gas. As the exhaust gas flows within the second vent pipe 708, it passes through the purification filter element 706 within the purification chamber 705. The purification filter element 706 filters out solid impurities such as dust from the exhaust gas, providing initial purification.

[0045] After the equipment has been running for a period of time, if it is necessary to clean the residual impurities on the inner walls of the second ventilation pipe 708 and the cleaning pipe 710, close the channel connecting the double-way valve 709 to the second ventilation pipe 708, open the channel connecting to the cleaning pipe 710, and start the booster pump 6. The cleaning water connected to the inlet pipe 602 enters the reverse flow box 601 under the action of the booster pump 6. After the flow rate is stabilized by the reverse flow box 601, it flows into the cleaning pipe 710, flushing part of the cleaning pipe 710 and the second ventilation pipe 708. The flushed wastewater can be discharged through the subsequent sewage discharge structure through the equipment's reserved sewage discharge interface, which is not shown in the figure. After cleaning is completed, turn off the booster pump 6, switch the double-way valve 709, and restore the normal delivery of exhaust gas to the cleaning pipe 710. The exhaust gas enters the third ventilation pipe 711 through the one-way valve 712.

[0046] Ventilation pipe 711 sends the exhaust gas into adsorption box 8, while simultaneously activating spray pump 803. The purification liquid in purification liquid tank 802, such as an alkaline solution, neutralizes acidic harmful gases. Under the action of spray pump 803, it enters spray ring 805 and is atomized through nozzles 806, then evenly sprayed into adsorption box 8. The atomized purification liquid fully contacts the exhaust gas, adsorbing and neutralizing the harmful gases, further purifying the exhaust gas. The clean gas after spray adsorption flows upward within adsorption box 8 and is finally discharged through exhaust pipe 801 at the bottom, meeting emission standards.

[0047] Before being discharged from exhaust pipe 801, the treated exhaust gas must meet the requirements of the "Emission Standard of Air Pollutants for Industrial Furnaces and Kilns" (GB9078-1996), with a dust emission concentration ≤30mg / m³. 3 Carbon monoxide emission concentration ≤100mg / m³ 3 Sulfide emission concentration ≤50mg / m³ 3 Enterprises are required to regularly commission third-party testing agencies to test their exhaust emissions and retain the test reports.

[0048] The wastewater discharged from adsorption tank 8 needs to enter the enterprise's wastewater treatment system for neutralization, sedimentation, and filtration. The treated wastewater must meet the Class I discharge standard in the "Integrated Wastewater Discharge Standard" (GB 8978-1996), namely, pH value 6-9, chemical oxygen demand (COD) ≤100mg / L, and suspended solids ≤70mg / L. Only after meeting the standards can it be discharged or reused.

Claims

1. A high-efficiency reactor for silicon carbide smelting, comprising a reactor (1) and a feed pipe (2) fixedly connected to the top of the reactor (1), wherein a heating pipe (3) is installed on the outer surface of the reactor (1), characterized in that: A tail gas treatment mechanism is provided on the right side of the reactor (1); The exhaust gas treatment mechanism includes an intake box (7), a cylinder (701), a piston (702), a first ventilation pipe (703), a first check valve (704), a purification box (705), a purification filter element (706), a second ventilation pipe (708), a two-way valve (709), a cleaning pipe (710), a third ventilation pipe (711), and a third check valve (712). The intake box (7) is fixedly installed in the middle of the right side of the reactor (1), the cylinder (701) is fixedly installed in the bottom right side of the reactor (1), the piston (702) is connected to the output end of the cylinder (701), and the first ventilation pipe (703) is fixedly installed in the middle of the right side of the reactor (1). 703) is fixedly connected to the top of the air intake box (7), the second air pipe (708) is fixedly connected to the top of the first air pipe (703), the cleaning pipe (710) is fixedly connected to the bottom of the second air pipe (708), the third air pipe (711) is fixedly connected to the right side of the cleaning pipe (710), the first one-way valve (704) is installed at the connection between the first air pipe (703) and the second air pipe (708), the double-way valve (709) is installed at the connection between the second air pipe (708) and the cleaning pipe (710), and the third one-way valve (712) is installed on the third air pipe (711).

2. The high-efficiency reactor for silicon carbide smelting according to claim 1, characterized in that: The purification box (705) is fixedly connected to the right side of the second ventilation pipe (708), the purification filter element (706) is slidably connected to the inside of the purification box (705), the right side of the purification filter element (706) is fixedly connected to a pull rod (707), and the side of the second ventilation pipe (708) is fixedly connected to a drain pipe (713).

3. The high-efficiency reactor for silicon carbide smelting according to claim 1, characterized in that: The piston (702) is sealed and slidably connected to the inside of the air intake box (7). The one-way valve (704) only allows gas to enter the air intake pipe (708) from the first air intake pipe (703), and the one-way valve (712) only allows gas to enter the air intake pipe (711) from the cleaning pipe (710).

4. The high-efficiency reactor for silicon carbide smelting according to claim 1, characterized in that: A support frame (4) is fixedly connected to the bottom of the reactor (1). A motor (5) is fixedly installed at the center of the top of the reactor (1). A rotating shaft (501) is connected to the output end of the motor (5). A dispersing rod (502) is fixedly connected to the outer surface of the rotating shaft (501). A ventilation ring (503) is fixedly connected to the middle of the inner wall of the reactor (1). A suction nozzle (506) is fixedly connected to the side of the ventilation ring (503). A connecting pipe (504) is fixedly connected to the top of the ventilation ring (503). A ventilation ring (505) is fixedly connected to the top of the connecting pipe (504). The ventilation ring (505) is fixedly connected to the inner wall of the reactor (1) near the top. The ventilation ring (505) is connected to the left end of the ventilation pipe (708).

5. The high-efficiency reactor for silicon carbide smelting according to claim 1, characterized in that: A booster pump (6) is provided on the right side of the reactor (1). The output end of the booster pump (6) is connected to a backflow box (601), and the input end of the booster pump (6) is connected to a water inlet pipe (602). The backflow box (601) is connected to the bottom of the cleaning pipe (710).

6. The high-efficiency reactor for silicon carbide smelting according to claim 1, characterized in that: The end of the ventilation pipe (711) away from the cleaning pipe (710) is connected to an adsorption box (8). A purification liquid tank (802) is fixedly installed on the top of the adsorption box (8). An inlet pipe (804) is fixedly connected to the top of the purification liquid tank (802). A spray pump (803) is installed on the side of the purification liquid tank (802).

7. A high-efficiency reactor for silicon carbide smelting according to claim 6, characterized in that: A spray ring (805) is fixedly connected to the inner wall of the adsorption box (8) near the top. A nozzle (806) is fixedly connected to the side of the spray ring (805). An exhaust pipe (801) is fixedly connected to the bottom side of the adsorption box (8).

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