Device for treating organic solvent in chemical exhaust gas

Abstract

The invention provides a device for treating an organic solvent in chemical exhaust gas. The device comprises a condenser and an expansion machine, wherein the air outlet end of the condenser is connected with a reinforced separator; the reinforced separator comprises a shell; an efficient separation packed bed is arranged in the shell; a driving shaft of the efficient separation packed bed is connected with an output shaft of a second speed reducer; an input shaft of the second speed reducer is connected with an output shaft of a first speed reducer through a transmission shaft; an input shaft of the first speed reducer is connected with a rotor of the expansion machine; the air outlet end of the reinforced separator is connected with the air inlet end of the expansion machine; the air outlet end of the expansion machine is connected with the condenser. The rotor of the expansion machine is driven to apply work by using the exhaust gas to drive the efficient separation packed bed of the reinforced separator to rotate at a high speed, so that organic solvent micro-droplets in the exhaust gas are caught and separated and are thrown out of the packed bed for collection, therefore, the droplets are prevented from bursting into the expansion machine to damage the rotor of the expansion machine, and the acting utilization rate of the expansion machine is increased.

Description

Technical field: [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a device for treating organic solvents in chemical tail gas. technical background: [0002] Most of the tail gas produced in the general chemical production process contains a small amount of organic solvent vapor and inert gas of liquid particles, such as the tail gas of the oxidation tower of the anthraquinone hydrogen peroxide production process. The existing treatment method is as follows: the tail gas containing organic solvents is condensed through the tail gas condenser, and then the gas-liquid separation is carried out through the tail gas separator, and then enters the activated carbon adsorber (filled with activated carbon particles), and the trace organic solvent in the tail gas is absorbed by the activated carbon. After adsorption and separation, it enters the expansion unit, which is composed of turbo expander, balance fan, self-regulating ...

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Problems solved by technology

But it has the following disadvantages: First, because the work done by the balance fan is only used to balance the work of the expander, the utilization efficiency is low; second, the activated carbon adsorber is easy to leak due to activated carbon particles, and these particles will also damage the high-speed expansion machine. The rotating rotor; the third is that when the activated carbon of the adsorber is saturated in adsorption, if it is not switched in time, once the organic solvent droplets that grow from the activated carbon particles enter the expander, it will also damage the expander rotor; the fourth is that regular replacement of activated carbon also increases running cost

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