Methanol filtering device, system and method for wax removal of methanol system

Abstract

The invention belongs to the technical field of methanol filtrating equipment, and provides a methanol filtering device, system and method for wax removal of a methanol system. The technical problem that wax is formed in a water system of an existing device for preparing olefin from methanol and is prone to blocking pipelines and equipment is solved. The methanol filtering device comprises a tankbody, an inner tank and a filtering unit, wherein the inner tank is arranged in the tank body, and a liquid storage cavity is formed by the outer wall of the inner tank and the inner wall of the tankbody. The tank body is provided with a methanol inlet and a methanol outlet. The methanol inlet is in communication with the liquid storage cavity, and the methanol outlet is in communication with theinner tank. The filtering unit is disposed on the inner tank to form a flow passage. The methanol outlet is provided with a cleaning medium inlet. A discharge outlet is formed in the lower part of the tank body. The methanol filtering system includes at least two methanol filtrating devices. A methanol inlet valve is arranged on the methanol inlet of each methanol filtrating device, and a methanol outlet valve is arranged on the methanol outlet of each methanol filtrating device. Cleaning medium valves are arranged on the cleaning medium inlets. A tee is arranged at each discharge outlet, anda methanol recovery valve and a wax liquid discharge valve are correspondingly disposed on each tee.

Description

technical field [0001] The invention belongs to the technical field of methanol filtering equipment, and in particular relates to a methanol filtering device, system and method for wax removal in a methanol system. Background technique [0002] Methanol-to-olefins units generally use methanol or refined methanol as a raw material, and react to produce low-carbon olefin product gas through the action of a catalyst. The product gas is washed, cooled and lowered in the quenching water washing system to remove catalyst and water, and then sent to the olefin separation unit for purification of ethylene, propylene, C4 and other products. The process of methanol to olefins produces 56% of water by-products while producing light olefins. In addition, oily substances are produced, which are easy to condense in quenching water and washing water. , air coolers, etc. will also lead to a decrease in heat transfer efficiency. In the actual production process, a small amount of catalyst ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems that the above-mentioned prior art cannot effectively solve the problem of wax formation in the water system of the methanol-to-olefins unit, easy to block pipelines and equipment, or solve the high cost of treatment, the present invention provides a method for wax removal in the methanol system. Methanol filtration device, system and method of the present invention

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