Methanol and C4-to-olefin quenched water and washing water airtight coupling treatment method and device

Abstract

The invention relates to a methanol and C4-to-olefin quenched water and washing water airtight coupling treatment method and device. The methanol and C4-to-olefin quenched water and washing water airtight coupling treatment method provided by the invention comprises the following steps: (a) carrying out rotational flow purification on reaction gases on the tops of a quenching tower and a C4 quenching tower so as to remove catalyst particles and liquid hydrocarbon entrained in the reaction gases, and washing the purified reaction gases by using water so as to improve the quality of the washing water; (b) carrying out liquid-solid separation and concentration on quenched water containing catalyst particles at the bottoms of the quenching tower and the C4 quenching tower, carrying out heat exchange on the separated and purified quenched water, and then returning the quenched water to the quenching tower so as to recycle the quenched water; (c) carrying out drying treatment on the separated and concentrated catalyst, and recycling the catalyst particles; (d) carrying out rotational flow oil removal on the washing water serving as feedstock of a stripping tower, purifying the washing water, and recycling sump oil entrained in the washing water, so that the quality of the water purified by the stripping tower reaches the standard. The invention also provides the methanol and C4-to-olefin quenched water and washing water airtight coupling treatment device.

Description

technical field

[0001] The invention belongs to the technical field of coal conversion, and relates to a method for using a micro-cyclone separator to recycle catalysts in quenching water for methanol and carbon tetraolefins, and to separate waste oil in washing water. Specifically, the present invention relates to a method and device for closed coupled treatment of quenching water and washing water for methanol and C4 olefins. Background technique

[0002] Ethylene and propylene are two important basic chemical raw materials, and their demand has been increasing in recent years. With the increasing shortage of oil resources, the original production route using oil as raw material is gradually replaced by the production route using coal, natural gas, biomass, etc. as raw materials. Alcohols, ethers, esters and other oxygenated compounds are produced from coal, natural gas, biomass and other energy sources, and then these oxygenated compounds replace petroleum to produce lig...

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