蒽醌法双氧水生产英文工艺流程翻译

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AO Process description

Work solution (WS) is pumped into filters to remove solid impurity, and then is preheated (or cooled) by going through heat exchanger and preheater. Hydrogen, which comes from chlor-alkali plant, is purified by filter, and then gets into hydrogenator with WS at the same time.

The hydrogenator is consisted of three palladium catalyst beds, and each section has gas and liquid distributer. The distributer can make the gas and liquid those get into the tower

well-distributed. Any section of the three beds can be used alone or two sections in series and three parts at the same time (in series) if necessary, which bases on the need of process and hydrogenate efficiency and activity of palladium catalyst. When two sections of the hydrogenater are used in series, the WS and hydrogen first get into the top of upper section, and then go through the palladium bed in concurrent downwards. After that, both the two flow out from the bottom of the upper section and then get into the top of down section by pipe outside the tower. The WS and hydrogen (not reacted) flow out from the bottom of the down section and then go into hydrogenater degasser.

Hydrogenated WS (HWS) and the not reacted hydrogen, which together come out from the hydrogenator, go into hydrogenator degasser. The gas flows out from the top, and then gets into condenser. Condensate goes into receiver tank, and off gas is exhausted after controlling the flow by flow meter.

Determined level of the degasser is controlled by auto valve. 10% HWS

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first gets into alumina bed, and then together with other 90% HWS go through filters to remove solid impurity. After that, HWS going through heat exchanger and then gets into tank.

Little hydrogen or other gases, which dissolve in the HWS, resolve in the tank. The gases then go into condenser, and are exhausted by evacuation water seal and flame arrester.

Part of the hydrogenated WS, which flows out from the hydrogenator degasser, is pumped back into the hydrogenator. This can make the temperature of the tower well-distributed, and hydrogenated efficiency steady and operation safe. Hydrogenated WS (HWS) and phosphoric acid are pumped into HWS cooler, in which the temperature of HWS is cooled down

to 50～55℃, and then both get into upper part of oxidizer. The HWS is stored in HWS tank, and the phosphoric acid is stored

in phosphoric acid mixing tank. Phosphoric acid is pumped by

metering pump.

There are three hollow sections of the oxidizer and the air is introduced into the tower from the bottom of middle and lower sections separately. The air is distributed into small bubble by gas distributor. Air flow based on oxidized efficiency and the concentration of oxygen in the off gas (normally is 6%-9%). Parts of or all the air, which is introduced into the middle and lower sections, flow into the bottom of the upper part of the oxidizer. The HWS and the air, which get into the bottom of the upper part, are concurrent upwards. HWS is partly oxidized and flows out from the top of the upper section and then gets into the bottom of the middle section. The HWS together with the fresh air are

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concurrent upwards. The mixture of air and liquid, which flows out from the top of the upper section, gets into degasser to eliminate air. After that, the liquid gets into the bottom of the lower part and together with the fresh air are concurrent upwards. The mixture of air and liquid, which flows out from the top of the middle section, gets into degasser to eliminate air. Determinate level of the degasser is controlled by auto valve. Oxidized WS (OWS), after cooled by cooler, gets into tank, and then is pumped into the bottom of extractor. Off gas of the