Pretreatment device for acetic acid production exhaust gas and treatment method
A processing device and processing method technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as affecting the effect of absorption treatment, pollution, waste of methanol raw materials, etc., to save equipment costs and raw material costs, saving Water resources, the effect of avoiding pollution
Pending Publication Date: 2018-07-20
镇江东辰环保科技工贸有限公司
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Problems solved by technology
Due to the volatilization of methanol during the absorption process, it will not only affect the absorption treatment effect, but also the treated tail gas still contains a large amount of methanol gas, which needs to be purified by the subsequent water washing tower before it can be discharged.
In this process, the water washing tower will produce a large amount of methanol-containing wastewater, which needs further treatment, and the methanol content in the final discharged purified gas is still high, which not only causes pollution, but also wastes methanol raw materials
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[0013] As shown in the figure, the pretreatment device of the acetic acid production tail gas of the embodiment of the present invention includes a methanol scrubber 1, and the tower body of the methanol scrubber is provided with a methanol inlet 2 connected with a methanol feed pipeline, and an acetic acid tail gas pipe. The tail gas inlet 3, the recovery liquid outlet 4 and the purified gas outlet 5 connected by the road; the methanol feeding pipeline is provided with a cooling device 6 capable of cooling methanol, and the cooling device is connected with the ethylene glycol cooling liquid circulation system 8. The tail gas inlet 3 is located at the lower part of the tower body, the methanol inlet 2 is connected to the spray device 7 located at the upper part of the tower body, and the purified gas outlet 5 and the recovered liquid outlet 4 are respectively located at the top and bottom of the tower body.
[0014] In the above-mentioned pretreatment device, the tail gas disch...
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The invention belongs to chemical industry feedstock production technologies and relates to a treatment device for acetic acid production exhaust gas of acetic acid production equipment and a treatment method. The treatment device provided by the invention comprises a methanol washing tower, wherein a methanol inlet connected with a methanol charging pipeline, an exhaust gas inlet connected with an acetic acid exhaust gas pipeline, a recovered solution outlet and a purified gas outlet are formed in a tower body of the methanol washing tower; a cooling device capable of cooling methanol is arranged on the methanol charging pipeline and is connected with an ethylene glycol coolant circulation system. The device provided by the invention is simple in structure, good in treatment effect, low in equipment cost, light in pollution and little in waste of raw materials.
Description
technical field [0001] The invention belongs to the production technology of chemical raw materials, and relates to a pretreatment device and a treatment method for acetic acid production tail gas in acetic acid production equipment. Background technique [0002] In the equipment for producing acetic acid with methanol and carbon monoxide as raw materials, after the raw materials are reacted in the reactor, the tail gas containing a small amount of acetic acid enters the tail gas pretreatment device for purification and then is discharged. In the existing production equipment, methanol is generally used as the absorbent to pretreat the tail gas in the absorption tower. Due to the volatilization of methanol during the absorption process, it will not only affect the absorption treatment effect, but also the treated tail gas still contains a large amount of methanol gas, which needs to be purified by the subsequent water washing tower before it can be discharged. In this proce...
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IPC IPC(8): B01D53/18B01D53/14
CPCB01D53/1493B01D53/18B01D2252/2021
Inventor 苏金泉吴举泰苏炜翔段红宇
Owner 镇江东辰环保科技工贸有限公司