Micro hydrocyclone separation and solid removal method and apparatus of MTO quench water and water of water-washing factory

Abstract

The invention provides a micro-vortex flow de-solid method used for MTO quenching water and washing water, comprising the steps as follows: the micro-vortex flow separation of the MTO quenching water is carried out so as to remove the contained catalyst grains wherein; the quenching purified water which is separated by micro-vortex flow is cooled so as to realize the circulation usage of water; the micro-vortex flow separation of the MTO washing water is carried out so as to remove the contained catalyst grains wherein, and the washing purified water separated by micro-vortex flow is cooled so as to realize the circulation usage of water. The invention also provides a micro-vortex flow de-solid device used for the MTO quenching water and washing water.

Description

technical field [0001] The invention belongs to the technical field of coal conversion, and relates to a method for removing a small amount of catalyst particles in the quenching water and washing water of the MTO process by using a micro-cyclone separator, which is suitable for treating solid- liquid heterogeneous separation process. Specifically, the invention provides a method and device for desolidifying MTO quenching water and washing water by micro-swirl flow. Background technique [0002] MTO (methanol to olefins) process catalyst particle separation belongs to the category of physical solid-liquid separation, that is, liquid desolidification. The current traditional physical solid-liquid separation technology can be mainly divided into: filtration, sedimentation, electrostatic separation, centrifugal separation, membrane separation and so on. In recent years, with the increase in the processing of fine slurry, membrane technology will become the key development dir...

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Problems solved by technology

However, under normal working conditions, the content of catalyst particles less than 5 microns in the quenching wastewater and washing water reaction wastewater reaches 80%. Although the concentration of catalyst particles is only 50mg / L, this will also lead to a sharp drop in the recycling rate of quenching wastewater, and the reaction water Large increase in throwing volume

[0006] In addition, although the method of installing one or more gas-solid separation devices on the top of the fluidized bed reactor is also adopted in the prior art, a small amount of catalyst fine particles are still carried in the reaction product gas flow out of the reactor, and these catalyst fine particles are carried in the quench tower. The particles leave the quench tower with the reaction wastewater, resulting in a small amount of hard-to-remove solid particles in the stripping reaction wastewater

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