Acrylic acid wastewater preprocessing process
A kind of acrylic acid and pretreatment technology, which is applied in the direction of degassed water/sewage treatment, etc., can solve the problems of low pass rate, slow treatment and high energy consumption of effluent wastewater, and achieve the effect of low cost, high pass rate and low energy consumption
Active Publication Date: 2013-04-03
ZHENGHE GROUP
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Problems solved by technology
[0004] Pollutants among them: formaldehyde, acetic acid, toluene, acrylic acid are difficult to be treated by biochemical methods, and they are often recycled multiple times or diluted with clean water to meet the discharge requirements, slow treatment, high energy consumption, long process, high cost, and outflow Wastewater pass rate is low
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[0010] Referring to the accompanying drawings, the acrylic acid wastewater pretreatment process adopts the stripping process, and the process flow is as follows: the acrylic acid wastewater first enters the buffer tank 1 through the pipeline, and the acrylic acid wastewater enters the buffer tank 1 before entering the stripping tower to ensure a stable amount of sewage, and then The acrylic acid wastewater is transported to the upper and lower parts of the stripper 3 in two ways through the machine pump 2 and the pipeline; the stripper gas is connected to the middle part of the stripper 3 as the stripping power; the acrylic acid wastewater in the stripper 3 is fed by the pump 4 The lower part of the stripping tower 3 is drawn out, heated by the waste water heater 5, and then circulated into the upper part of the stripping tower 3 for circulation treatment, and the acrylic acid wastewater after the circulation treatment is transported to the biochemical treatment system through p...
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The invention relates to an acrylic acid wastewater preprocessing process which adopts a steam stripping process and comprises the process flows that acrylic acid wastewater firstly enters a buffer tank, and then is transported to the upper part and the lower part of a steam stripping tower after being divided into two paths through a machine pump and a pipeline; the middle part of the stripping tower is connected with steam stripping gas; the acrylic acid wastewater is pumped out from the lower part of the steam stripping tower through a pump and circularly enters the upper part of the steamstripping tower for circular processing after being heated through a wastewater heater, and the acrylic acid wastewater after the circular processing is transported to a wastewater biochemical processing system through the pipeline; and when the amount of the acrylic acid wastewater is small, the wastewater is not transported out of the tower bottom any more, and all the wastewater entering the steam stripping tower enters a sequent acrylic acid tail gas catalytic oxidation processing system along with the steam stripping gas for purification processing. In the invention, the wastewater is preprocessed by adopting the steam stripping process, and compared with the prior art, the acrylic acid wastewater preprocessing process has the advantages of rapid wastewater processing, small energy consumption, short flow, low cost and high qualified rate of the discharged wastewater.
Description
1. Technical field [0001] The invention relates to a wastewater treatment process, in particular to an acrylic acid wastewater pretreatment process. 2. Background technology [0002] At present, the treatment of acrylic acid wastewater mostly adopts wastewater biochemical treatment process, that is, the refractory long-chain or ring-chain organic matter in acrylic acid wastewater in the anoxic zone wastewater can be decomposed into easily degradable short-chain or straight-chain organic matter, and the activated sludge is passed through Hypoxic stimulation improves its biological activity and sedimentation properties. Afterwards, the wastewater is pushed into the aerobic area, and the microporous aeration device is used for oxygenation and aeration to supply oxygen to the aerobic microorganisms to maintain microbial metabolism. Oxidize COD to CO 2 and H 2 O, under the action of nitrous bacteria, NH 3 -N oxidation to NO 2 -N salt, the wastewater after nitrification is re...
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IPC IPC(8): C02F1/20
Inventor 刘志杰徐祥村王敬智胡勇
Owner ZHENGHE GROUP