Discharging method and device for non-condensable gas of pressure boiler
A pressure cooker and condensing technology, which is applied in the field of non-condensable gas discharge, can solve the problems of unfavorable production safety and stable operation, easy splashing and leakage of slurry, and large pipeline vibration, so as to reduce production costs and maintenance costs, The effect of prolonging the dissolution reaction time and stabilizing the pressure
Inactive Publication Date: 2007-07-18
GUIYANG AL-MG DESIGN & RES INST
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Problems solved by technology
[0002] In the existing alumina ore dissolution technology, the discharge method of non-condensable gas in the dissolution autoclave is artificial intermittent discharge: a non-condensable gas pipe is arranged on the autoclave, and a non-condensable gas pipe is connected below the non-condensable gas pipe. The discharge funnel, the worker will open the exhaust valve regularly, so that the non-condensable gas in the autoclave will be discharged into the discharge funnel. Since the pressure in the autoclave is as high as 52 kg, the temperature of the pulp in the autoclave is 260 ° C, and the discharged The gas carries part of the slurry and rushes into the discharge funnel at an extremely fast speed. The pipeline vibrates greatly every time it is exhausted, the valve wears seriously, and the slurry is easily splashed and leaked, which is not conducive to the safe and stable operation of production.
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[0008] Embodiment of the present invention: can carry out transformation on the existing technology, start from the first stage autoclave (1), connect the noncondensable gas pipe (2) on the upper stage autoclave (1) with the lower The feed pipe (3) on the first-stage pressure cooker (1) is connected, and the non-condensable gas pipe (2) on the last-stage pressure cooker (1) is connected with the pressure cooker (1) to the flash evaporator (4 ), and an exhaust pipe (5) is installed on each flash evaporator (4) arranged in sequence, so that the decompressed non-condensable gas can pass through the flash evaporator ( 4) The exhaust pipe (5) on the top is discharged into the atmosphere.
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The present invention discloses discharging method and apparatus for non-condensable gas of autoclave. The apparatus includes autoclaves and flash evaporator, and the non-condensable gas is discharged from the previous autoclave to the next one successively until the last one, discharged from the last autoclave to the flash evaporator via material pipeline, and discharged from the flash evaporator to atmosphere. The present invention has the full operation of autoclaves, raised heat efficiency and prolonged lixiviation and reaction time, and can avoid the abrupt rushing out of non-condensable gas to ensure safe and stable production, prolong the service life of the valves and lower production cost.
Description
Technical field: [0001] The invention relates to a method and a device for discharging non-condensable gas from an autoclave used for dissolving slurry in alumina production. Background technique: [0002] In the existing alumina ore dissolution technology, the discharge method of non-condensable gas in the dissolution autoclave is artificial intermittent discharge: a non-condensable gas pipe is arranged on the autoclave, and a non-condensable gas pipe is connected below the non-condensable gas pipe. The discharge funnel, the worker will open the exhaust valve regularly, so that the non-condensable gas in the autoclave will be discharged into the discharge funnel. Since the pressure in the autoclave is as high as 52 kg, the temperature of the pulp in the autoclave is 260 ° C, and the discharged The gas carries part of the slurry and rushes into the discharge funnel at a very fast speed. The pipeline vibrates greatly every time it is exhausted, the valve wears seriously, and ...
Claims
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IPC IPC(8): C01F7/02
CPCY02P20/10
Inventor 吕胜利高振文杨小平
Owner GUIYANG AL-MG DESIGN & RES INST
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