Method for purifying organic waste gas containing epoxypropane or ethylene oxide
A technology of ethylene oxide and propylene oxide, which is applied in the field of organic waste gas purification and treatment, can solve the problems of many impurities, the inability to effectively use solid acid catalyst for catalytic treatment for a long time, and the ineffective use of raw materials such as propylene oxide or ethylene oxide. , to achieve the effect of mild reaction conditions
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[0052] Example 1
[0053] The exhaust gas in this embodiment comes from the process of polymerization reaction of propylene oxide, propylene glycol, sorbitol, sugar, etc., with propylene oxide to produce polyether polyol under the action of a strong alkaline catalyst. The exhaust gas treatment process is as follows: figure 1 As shown, the exhaust gas treatment steps are as follows:
[0054] (A) The exhaust gas is buffered in the buffer tank through the fan, so that the maximum flow rate and the highest concentration of the exhaust gas are homogenized, and the average gas volume is maintained at 3000Nm 3 / Day, the PO concentration is about 30v%; other components in the waste gas include: organic amine 58ppm, ethanol 320ppm, low molecular polyether 810ppm, metal ions K, Fe, Na, and the rest are nitrogen. The specific content is shown in Table 2.
[0055] (B) The homogenized exhaust gas enters the solvent absorption tower filled with modified activated carbon filler. The residence time ...
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[0068] Example 2
[0069] The exhaust gas in this embodiment comes from the process of polymerization reaction of ethylene oxide with ethylene oxide to produce polyether polyol from the initiator ethylene glycol, sorbitol, sugar, etc. under the action of a strong alkaline catalyst. The exhaust gas treatment steps are as follows:
[0070] (A) The organic waste gas is buffered by a buffer tank to homogenize the maximum flow rate and the highest concentration part of the waste gas, and maintain an average gas volume of 3000Nm 3 / Day, EO concentration is about 35v%; other impurity components in the exhaust gas include: organic amine 83ppm, ethanol 240ppm, low-molecular-weight polyether 634ppm, metal ions K, Fe, Na, the rest is nitrogen, the specific content is shown in Table 4;
[0071] (B) After homogenization, it enters into the solvent absorption tower filled with modified activated carbon filler, the residence time of waste gas in the tower is 10s, and the solvent circulation volume i...
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