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Efficient washing device and method of catalyst in reaction gas

A technology of reaction gas and washing device, which is applied in the direction of chemical instruments and methods, separation methods, and the use of liquid separation agents, etc., can solve the problems of shortened operation cycle, insufficient gas-liquid contact, and increased system resistance, so as to reduce the cost of parking and cleaning frequency, improve the cooling effect, and the effect of uniform gas-liquid contact

Inactive Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that in the methanol-to-light olefins device in the prior art, there are unreasonable quench tower design, uneven gas-liquid distribution, insufficient gas-liquid contact, and catalyst fine powder washing. The removal efficiency is not high, and the catalyst fine powder enters the subsequent tower, heat exchanger and pipeline system, causing subsequent equipment and pipeline blockage, resulting in increased system resistance, decreased operating load, increased device consumption, and shortened operating cycle. A new High-efficiency scrubbing device for catalyst in reaction gas

Method used

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  • Efficient washing device and method of catalyst in reaction gas

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Embodiment 1

[0034] A high-efficiency scrubbing device for catalyst in reaction gas. In the high-efficiency scrubbing device at the outlet of the fluidized bed reactor, two layers of reaction gas scrubbing liquid spraying layers composed of hollow cone nozzles arranged in a square are arranged. The arrangement density of the nozzles is 2 nozzles / m 2 , the angle between the center line of the spraying direction of the upper and lower adjacent spraying layer nozzles is 0°, and above the spraying layer, two theoretical bubble cap plates are set as demisters. There are 6 theoretical plate grid fillers above the inlet, and a dendritic porous distributor is installed at the inlet of the reaction gas. After being washed by the nozzle spray layer of the high-efficiency washing device, the removal rate of the catalyst fine powder entrained in the reaction gas reaches 99.8%, and the high-efficiency washing There is no blockage in the device and subsequent systems, the separation efficiency of the se...

Embodiment 2

[0037] A high-efficiency scrubbing device for catalysts in reaction gas. In the high-efficiency scrubbing device at the outlet of the fluidized bed reactor, 10 layers of reaction gas scrubbing liquid spray layers composed of solid cone nozzles arranged in an equilateral triangle are arranged. The arrangement density of the nozzles is 1 nozzle / m 2 , the angle between the center line of the spraying direction of the upper and lower adjacent spray layer nozzles is 180°, and a sieve plate of a theoretical plate is set above the spray layer as a demister, below the reaction gas washing liquid spray layer, the reaction gas inlet Raschig ring packing with 10 theoretical plates is installed on the top, and a double-row vane distributor is installed at the inlet of the reaction gas. After being washed by the high-efficiency washing device, the removal rate of the catalyst fine powder entrained in the reaction gas reaches 99.6%. The high-efficiency washing device and subsequent systems h...

Embodiment 3

[0040] A high-efficiency scrubbing device for catalyst in reaction gas, in the high-efficiency scrubbing device at the outlet of the fluidized bed reactor, two layers of reaction gas scrubbing liquid spraying layer composed of spiral nozzles arranged in a rectangle are arranged, and the arrangement density of the nozzles is 4 nozzles / m 2 , the angle between the center line of the spraying direction of the upper and lower adjacent spray layer nozzles is 30°, and a theoretical plate of packing is set above the spray layer as a demister, below the reaction gas washing liquid spray layer and above the reaction gas inlet The regular corrugated packing with 2 theoretical plates is installed, and the semi-circular pipe distributor is installed at the inlet of the reaction gas. After being washed by the high-efficiency washing device, the removal rate of the catalyst fine powder entrained in the reaction gas reaches 99.7%. The separation efficiency of the tower, the heat transfer effe...

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Abstract

The invention relates to an efficient washing device and method of a catalyst in reaction gas, and aims at mainly solving the problems in the prior art that the washing efficiency of the catalyst in the reaction gas at an outlet of a methanol-to-olefin fluidized bed reactor is low, the catalyst powder enters a subsequent system along the reaction gas to block equipment including a subsequent tower device, a heat exchanger and the like and a pipeline so that the operation period of the device is shortened. The problems are solved very well by adopting the technical scheme that the efficient washing device is composed of a shell, a reaction gas inlet, a reaction gas outlet, a reaction gas washing liquid inlet and a catalyst washing liquid outlet, wherein washing liquid spraying layers composed of nozzles which are arrayed according to a geometrical shape are arranged above the reaction gas inlet in the washing device and at the reaction gas washing liquid inlet; the included angle between the central lines of the spraying directions of the upper and lower adjacent spraying layers is 0-180 degrees; and reaction gas washing liquid is in contact with the reaction gas to wash the reaction gas. The efficient washing device can be used for an industrial methanol-to-olefin device.

Description

technical field [0001] The invention relates to a high-efficiency washing device and method for catalyst in reaction gas. Background technique [0002] In the methanol-to-light olefins unit, the reaction gas at the outlet of the fluidized bed reactor contains catalyst fine powder, which must be removed in the quench tower, otherwise it will cause blockage of the tower, heat exchanger, pipeline, etc. when entering the subsequent system. As a result, the resistance of the system increases, the separation efficiency of the tower decreases, the heat exchange effect of the heat exchanger decreases, the consumption of the device increases, and the operating cycle is shortened, which affects the normal operation of the device. In severe cases, it must be stopped for cleaning. [0003] In the methanol-to-light olefins plant, the quench tower is a key equipment. The reaction gas at the outlet of the fluidized bed reactor is pre-cooled from 450~500°C to about 240~280°C, and then furt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D47/06
CPCB01D47/06
Inventor 顾军民熊瑾
Owner CHINA PETROLEUM & CHEM CORP
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