Formamide tail gas recovery and integral utilization process

Abstract

The invention belongs to the field of chemical industrial waste gas recovery and particularly relates to a formamide tail gas recovery and integral utilization process, which comprises the following steps that: firstly, formamide tail gas is pressurized to 1.0 to 1.5Mpa through a hydrogen compressor; then, the tail gas enters a heat exchange to be heated to 200 to 400 DEG C; next, the tail gas enters a conversion furnace to be decomposed into carbon monoxide and hydrogen gas; then, the obtained gas is added into an oxygenation conversion furnace to be further converted into carbon monoxide, carbon dioxide and hydrogen gas; next, the obtained mixed gas passes through the conversion furnace for converting the carbon monoxide into the carbon dioxide, and the temperature of the conversion furnace is controlled at 380 to 450 DEG C; and finally, the carbon dioxide in the mixed gas is removed through methyl di ethanol amine (MDEA) solution, so the hydrogen gas is obtained through separation. The formamide tail gas recovery and integral utilization process adopting the technical scheme has the advantages that the pollution is little, in addition, the recovery and utilization can be realized, and the economic benefits and the environment benefits are high.

Description

technical field [0001] The invention belongs to the field of recovery of chemical waste gas, and in particular relates to a process for comprehensive utilization of formamide tail gas recovery. Background technique [0002] Formamide has active reactivity and special dissolving power, and can be used as raw material for organic synthesis, paper treatment agent, softener in fiber industry, softener for animal glue, and analytical reagent for determining amino acid content in rice. In organic synthesis, there are many uses in medicine, and there are also many uses in pesticides, dyes, pigments, spices, and auxiliaries. Formamide is also an excellent organic solvent, mainly used in the spinning of acrylonitrile copolymers and ion exchange resins, as well as anti-static coating or conductive coating of plastic products, so the demand for formamide is huge. [0003] The huge production volume of formamide leads to a huge amount of tail gas in the production process. The tail gas...

AI Technical Summary

Problems solved by technology

For the treatment of this part of exhaust gas, the traditional way is to burn it as fuel gas, but due to the low calorific value of hydrogen, it is only 10779MJ / m 3 Compared with the price of hydrogen, this treatment method is obviously very wasteful. In addition, because other impurities will emit pungent odors during the combustion process and pollute the local environment, this formamide tail gas treatment method is not easy to promote