Gas sealing device of carbonization furnace
A technology of gas sealing and carbonization furnace, which is applied to engine sealing, fiber chemical characteristics, textiles and paper making, etc. It can solve problems such as single sealing structure, inability to open, disassemble and clean, poor sealing effect, etc., to achieve enhanced air sealing effect, No pressure drop, achieve uniform effect
Active Publication Date: 2012-05-02
XIAN KANGBEN MATERIAL
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[0007] In order to overcome the shortcomings of the existing non-contact labyrinth sealing device, such as single sealing structure, poor sealing effect, inability to open for disassembly and cleaning, and timely release of pressure when the pressure in the device is high, the present invention proposes a carbonization furnace gas seal
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[0020] This example is a device that uses a labyrinth structure to seal the gas of a carbonization furnace, including a flange 1 connected to the carbonization furnace, a tapered pipe 2, a gas ejection pipe 5, a gas choke plate 7, a gas nozzle 9, and a nitrogen pipe 10. Exhaust gas reserved opening 11, furnace head extension 12, furnace gate shutter 13, butterfly bolt 14 and shell 15. Wherein, there is an included angle of 45° between the gas ejection pipe 5 and the horizontal plane. The housing 15 is composed of an upper flange cover 3 fixed on the upper surface of the box body and a lower flange cover 4 fixed on the lower surface of the box body. Both the upper flange cover 3 and the lower flange cover 4 and the box body are sealed with 450°C high-temperature-resistant polytetrafluoroethylene-graphite elastic gaskets.
[0021] Gas ejection pipes 5 are respectively fixed in the upper flange cover 3 and the lower flange cover 4 at the outlet end of the housing 15, and the gas...
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The invention relates to a gas sealing device of a carbonization furnace. The device is characterized in that: mutually-symmetrical gas emission tubes are fixed on the outlet ends of a housing respectively; there is an angle of 90DEG between the gas outlet center lines of the gas emission tubes, and the gas outlet center lines of the gas emission tubes are intersected with the center line of a conical tube; a gas sealing case is positioned in an intermediate casing at the other end of the housing; seven pairs of gas spoilers are symmetrically arranged in the inner chamber of the gas sealing casing; a gas expansion chamber is formed between adjacent surfaces of two gas spoilers; and there are gas emission ports between adjacent gas spoilers. Nitrogen which goes through the gas emission ports enters the gas expansion chamber and up-down blows, and an eddy current is formed after the gas expands, so the exhaust gas spill and the access of extraneous air to a hearth are effectively prevented. There is an angle of 45DEG C between each gas emission tube and the horizontal plane, and a throat sealing effect is formed in the air sealing case, so the air sealing effect is enhanced. When the pressure of the device in the nitrogen pipeline is 0.15MPa, the pressure in the gas case is 0.15MPa. The device allows a pressure to be maintained for 3h under 300Pa when the pressure is 0.1MPa.
Description
technical field [0001] The invention relates to a gas sealing device, in particular to a gas sealing device for a carbonization furnace. Background technique [0002] The polyacrylonitrile precursor is transformed into a heat-resistant trapezoidal structure after pre-oxidation treatment, and then transformed into an inorganic carbon fiber with a turbostratic graphite structure and a carbon content of more than 92% through low-temperature carbonization and high-temperature carbonization. The carbonization process is realized through a carbonization furnace under nitrogen protection and anaerobic conditions, and the exhaust gas contains tar, HCN, CO 2 , CO, NH 3 and other substances. Therefore, the sealing device used in conjunction with the carbonization furnace is one of the key equipment of the carbonization furnace. The sealing device can prevent the exhaust gas in the furnace from being discharged into the room, and also block the infiltration of air outside the furnace...
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IPC IPC(8): D01F9/12F16J15/40
Inventor 许东刘维鹏张鹏李向阳耿丽
Owner XIAN KANGBEN MATERIAL