Carbon tube heating furnace for high-density silicon carbide electric heating element

Abstract

The utility model discloses a carbon tube heating furnace for a high-density silicon carbide electric heating element, which comprises a carbon tube heating furnace body, a preheating bin is arranged at the front part of the carbon tube heating furnace body, a cooling bin is arranged at the tail part of the carbon tube heating furnace body, and a cross-shaped heat exchange assembly is connected to an outlet of a smoke exhaust pipe of the carbon tube heating furnace body. The utility model relates to the technical field of heating equipment for processing silicon carbide electric heating elements, the cross-shaped heat exchange assembly is arranged at the outlet of the smoke exhaust pipe, external cold air is introduced to exchange heat with high-temperature smoke, the heat exchange efficiency is improved, and the heat exchange efficiency is improved. The temperature of the flue gas is reduced, meanwhile, the heated fresh air is supplied into the preheating bin, the preheating effect on the high-density silicon carbide electric heating element is achieved, the cooled flue gas is further injected into the tail gas purification assembly, and carbon monoxide flushed by the flue gas is adsorbed through a mist-state solution sprayed out of the spraying purification part.

Description

Technical Field

[0001] The utility model relates to the technical field of heating equipment for processing silicon carbide electric heating elements, in particular to a carbon tube heating furnace for high-density silicon carbide electric heating elements. Background Art

[0002] High-density silicon carbide heating element is a rod-shaped non-metallic high-temperature heating element made of high-quality green silicon carbide as the main raw material, processed into embryos, high-temperature silicification, and recrystallization. Compared with metal heating elements, this element has the characteristics of high temperature, oxidation resistance, and corrosion resistance. Therefore, it is widely used in a variety of high-temperature electric furnaces and other electric heating equipment in industries such as magnetic materials, ceramics, glass, metallurgy and machinery.

[0003] The carbon tube heating furnace is a common equipment for producing high-density silicon carbide electric heating elements. At present, the carbon tube heating furnace consists of three parts: a propeller, a sintering section, and a cooling section. In the prior art, during the use of the carbon tube heating furnace, a certain amount of waste gas will be generated due to incomplete combustion. The waste gas contains carbon monoxide, which has adverse effects on human health. Therefore, the waste gas needs to be recycled and treated. At the same time, the waste gas temperature is high and is directly discharged, resulting in a serious waste of heat energy. In view of this, in-depth research on the above issues led to the creation of this case. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a carbon tube heating furnace for a high-density silicon carbide electric heating element, which solves the problems raised in the background technology.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a carbon tube heating furnace for high-density silicon carbide electric heating elements, comprising a carbon tube heating furnace body, a preheating chamber is arranged at the front of the carbon tube heating furnace body, and a cooling chamber is arranged at the rear, a cross-shaped heat exchange component is connected to the exhaust pipe outlet of the carbon tube heating furnace body, one end of the cross-shaped heat exchange component is connected to an air guide channel, and one end of the air guide channel is connected to the exhaust gas purification component;

[0006] The cross-shaped heat exchange component includes a heat exchange bin, a heat exchanger, an air inlet duct and a return air duct. The heat exchanger is a rectangular box-type shell. The shell is staggered and isolated into a continuous air duct by a diversion baffle. The air inlet of the shell is connected to the smoke exhaust pipe, and the air outlet of the shell is connected to the exhaust gas purification component. The heat exchange bin is mounted on the outside of the heat exchanger, the air inlet duct is connected to the heat exchange bin via the bottom of the heat exchange bin, and the return air duct is connected to the preheating bin via the top of the heat exchange bin. A blower is installed at one end of the air inlet duct.

[0007] Heat exchange fins are uniformly welded on the side walls at the upper and lower ends of the shell.

[0008] The above-mentioned exhaust gas purification component includes an axial flow fan, a purification chamber, an L-shaped air injection pipe and a spray purification component. The axial flow fan is installed on the air guide channel, the purification chamber is arranged on one side of the axial flow fan, the upper side wall of the purification chamber is connected to the smoke exhaust duct, one end of the L-shaped air injection pipe is connected to the axial flow fan, and the other end is inserted into the purification chamber, and the spray purification component is installed on the outside of the opening position of the L-shaped air injection pipe and one end extends out of the purification chamber and is connected to the liquid storage tank.

[0009] The above-mentioned spray purification component includes an annular water pipe, a spray head, a liquid supply pipe and a booster pump. The annular water pipe is arranged in the purification chamber and is mounted on the outside of the L-shaped air injection pipe. The spray head is evenly distributed on the inner ring surface of the annular water pipe along the inclined direction. One end of the liquid supply pipe is connected to the annular water pipe and the other end extends out of the purification chamber. The liquid inlet end of the booster pump extends into the liquid storage tank, and the liquid outlet end is connected to the liquid supply pipe.

[0010] The liquid storage tank is filled with sodium hydroxide solution.

[0011] Wind shields are arranged at the air inlet and the air outlet on the shell side wall of the heat exchanger along an inclined direction.

[0012] The utility model provides a carbon tube heating furnace for high-density silicon carbide electric heating elements. It has the following beneficial effects: the carbon tube heating furnace for high-density silicon carbide electric heating elements improves the existing carbon tube heating furnace body exhaust system, and a cross-shaped heat exchange component is set at the exhaust pipe outlet to introduce external cold air and high-temperature flue gas for heat exchange, while reducing the flue gas temperature, the heated fresh air is supplied into the preheating chamber to achieve the preheating effect of the high-density silicon carbide electric heating element, reduce heat waste, and reduce the cost of preheating operations. The flue gas after cooling is further injected into the exhaust gas purification component, and the mist solution sprayed by the spray purification component adsorbs the carbon monoxide rushed by the flue gas to avoid the adverse effects of the exhaust gas on the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of a carbon tube heating furnace for a high-density silicon carbide electric heating element described in the utility model.

[0014] Figure 2 For this utility model Figure 1 A partial side view structural diagram of .

[0015] Figure 3 It is a schematic diagram of the axonometric structure of the heat exchanger described in the utility model.

[0016] Figure 4 It is a schematic diagram of the internal structure of the heat exchanger described in the utility model.

[0017] In the figure: 1. Carbon tube heating furnace body; 2. Preheating chamber; 3. Cooling chamber; 4. Smoke exhaust pipe; 5. Air guide channel; 6. Heat exchange chamber; 7. Heat exchanger; 8. Air inlet duct; 9. Return air duct; 10. Blower; 11. Heat exchange fin plate; 12. Axial flow fan; 13. Purification chamber; 14. L-shaped air injection pipe; 15. Liquid storage tank; 16. Annular water guide pipe; 17. Sprinkler head; 18. Liquid supply pipe; 19. Booster pump; 20. Wind shield; 701. Shell; 702. Diverter baffle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0020] Embodiment: This solution is aimed at the problem that in the prior art, during the processing of high-density silicon carbide electric heating elements, a certain amount of high-temperature exhaust gas containing carbon monoxide will be generated due to incomplete combustion during the use of the carbon tube heating furnace. Carbon monoxide has adverse effects on human health, and the direct discharge of high-temperature exhaust gas causes energy waste. Figure 1-3It can be seen that the present application specifically designs a carbon tube heating furnace for high-density silicon carbide electric heating elements, wherein a preheating chamber 2 is arranged at the front of the carbon tube heating furnace body 1, and a cooling chamber 3 is arranged at the rear, and a cross-shaped heat exchange component is connected to the outlet of the exhaust pipe 4 of the carbon tube heating furnace body 1, and one end of the cross-shaped heat exchange component is connected to an air guide channel 5, and one end of the air guide channel 5 is connected to the exhaust gas purification component; the cross-shaped heat exchange component includes a heat exchange chamber 6, a heat exchanger 7, an air inlet duct 8 and a return air duct 9, and the heat exchanger 7 is a rectangular box-type shell 701, The shell 701 is staggered and isolated into a continuous air duct by the diversion baffle 702. The air inlet of the shell 701 is connected to the smoke exhaust pipe 4, and the air outlet of the shell 701 is connected to the exhaust gas purification component. Heat exchange fins 11 are evenly welded on the upper and lower side walls of the shell 701. The heat exchange chamber 6 is mounted on the outside of the heat exchanger 7. The air inlet duct 8 is connected to the heat exchange chamber 6 through the bottom of the heat exchange chamber 6. The return air duct 9 is connected to the preheating chamber 2 through the top of the heat exchange chamber 6. A blower 10 is installed at one end of the air inlet duct 8. The shell 7 of the heat exchanger 7 The air inlet and outlet positions on the side wall of 01 are both provided with wind shields 20 in an inclined direction. When in use, the high-temperature exhaust gas first enters the shell 701 of the heat exchanger 7, and moves along the continuous air duct formed by the shell 701 and the diversion baffle 702. During the movement, heat is exchanged with the shell 701 and the heat exchange fin plate 11. At this time, the blower 10 injects the external cold air into the heat exchange chamber 6 through the air inlet duct 8 to exchange heat with the heat exchanger 7. The heated fresh air is further injected into the heat exchange chamber 6 through the air outlet duct under the action of wind pressure. In the preheating chamber 2, the high-density silicon carbide electric heating element is preheated, which can effectively reduce heat waste and reduce the cost of preheating operations. The air inlet and outlet positions on the side wall of the shell 701 of the heat exchanger 7 are both provided with wind shields 20 in an inclined direction, which can extend the residence time of the fresh air in the heat exchange chamber 6, making the heat exchange more sufficient; at the same time, the cooled exhaust gas is further injected into the exhaust purification component, and the carbon monoxide rushed by the flue gas is adsorbed by the mist solution sprayed by the spray purification component to avoid the adverse effects of the exhaust gas on the human body.

[0021] In the specific implementation process, the exhaust gas purification component includes an axial flow fan 12, a purification chamber 13, an L-shaped air injection pipe 14 and a spray purification component. The axial flow fan 12 is installed on the air guide channel 5, and the purification chamber 13 is arranged on one side of the axial flow fan 12. The upper side wall of the purification chamber 13 is connected to the smoke exhaust duct. One end of the L-shaped air injection pipe 14 is connected to the axial flow fan 12 and the other end is inserted into the purification chamber 13. The spray purification component is sleeved on the outside of the opening position of the L-shaped air injection pipe 14 and one end extends out of the purification chamber 13 and communicates with the liquid storage tank 15. The spray purification component includes an annular water guide pipe 16, a spray head 17, a liquid supply pipe 18 and a booster pump 19. The annular water guide pipe 16 is arranged in the purification chamber 13 and sleeved on the outside of the L-shaped air injection pipe 14. The spray head 17 is evenly distributed on the inner ring surface of the annular water guide pipe 16 along the inclined direction. One end of the liquid supply pipe 18 is connected to the annular water conduit 16, and the other end extends out of the purification chamber 13. The liquid inlet end of the booster pump 19 extends into the liquid storage tank 15, and the liquid outlet end is connected to the liquid supply pipe 18. The liquid storage tank is filled with sodium hydroxide solution. When in use, the axial flow fan 12 is started, and the exhaust gas air guide channel 5 is sucked into the exhaust gas guide channel 5 by the axial flow fan 12, and injected into the purification chamber 13 through the L-shaped air injection pipe 14. While the exhaust gas is diffusing in the purification chamber 13, the booster pump 19 is started, and the sodium hydroxide solution in the liquid storage tank is injected into the annular water conduit 16 through the liquid supply pipe 18 by the booster pump 19, and further sprayed out through the spray head 17. The sodium hydroxide mist particles can effectively increase the contact area with the exhaust gas and improve the purification efficiency. Using sodium hydroxide solution as the adsorption solution can effectively improve the absorption and dissolution efficiency of carbon monoxide.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A carbon tube heating furnace for high-density silicon carbide electric heating elements, comprising a carbon tube heating furnace body, wherein the front portion of the carbon tube heating furnace body is provided with a preheating chamber, and the rear portion is provided with a cooling chamber, characterized in that: The exhaust pipe outlet of the carbon tube heating furnace body is connected to a cross-shaped heat exchange component, one end of the cross-shaped heat exchange component is connected to an air guide channel, and one end of the air guide channel is connected to the tail gas purification component; The cross-shaped heat exchange component includes a heat exchange bin, a heat exchanger, an air inlet duct and a return air duct. The heat exchanger is a rectangular box-type shell. The shell is staggered and isolated into a continuous air duct by a diversion baffle. The air inlet of the shell is connected to the smoke exhaust pipe, and the air outlet of the shell is connected to the exhaust gas purification component. The heat exchange bin is mounted on the outside of the heat exchanger, the air inlet duct is connected to the heat exchange bin via the bottom of the heat exchange bin, and the return air duct is connected to the preheating bin via the top of the heat exchange bin. A blower is installed at one end of the air inlet duct.

2. The carbon tube heating furnace for high-density silicon carbide electric heating elements according to claim 1, characterized in that: Heat exchange fins are uniformly welded on the side walls at the upper and lower ends of the shell.

3. The carbon tube heating furnace for high-density silicon carbide electric heating elements according to claim 1, characterized in that: The exhaust gas purification component includes an axial flow fan, a purification chamber, an L-shaped air injection pipe and a spray purification component. The axial flow fan is installed on the air guide channel, the purification chamber is arranged on one side of the axial flow fan, the upper side wall of the purification chamber is connected to the smoke exhaust duct, one end of the L-shaped air injection pipe is connected to the axial flow fan, and the other end is inserted into the purification chamber, and the spray purification component is mounted on the outside of the opening position of the L-shaped air injection pipe and one end extends out of the purification chamber and is connected to the liquid storage tank.

4. The carbon tube heating furnace for high-density silicon carbide electric heating elements according to claim 3, characterized in that: The spray purification component includes an annular water pipe, a spray head, a liquid supply pipe and a booster pump. The annular water pipe is arranged in the purification chamber and is mounted on the outside of the L-shaped air injection pipe. The spray head is evenly distributed on the inner ring surface of the annular water pipe along the inclined direction. One end of the liquid supply pipe is connected to the annular water pipe and the other end extends out of the purification chamber. The liquid inlet end of the booster pump extends into the liquid storage tank, and the liquid outlet end is connected to the liquid supply pipe.

5. The carbon tube heating furnace for high-density silicon carbide electric heating elements according to claim 4, characterized in that: The liquid storage tank is filled with sodium hydroxide solution.

6. The carbon tube heating furnace for high-density silicon carbide electric heating elements according to claim 1, characterized in that: Wind shields are arranged at the air inlet and the air outlet on the shell side wall of the heat exchanger along an inclined direction.

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