Device for recovering tetrahydrofuran

Abstract

The device comprises a bearing bottom plate, a steam generator located at the left end of the bearing bottom plate is fixedly installed on the top face of the bearing bottom plate, and an activated carbon receiving box located in the middle of the bearing bottom plate is placed on the top face of the bearing bottom plate; the small module can be subjected to steam heating through the desorption structure, in the process, activated carbon particles needing to be penetrated by steam are thin, air resistance is small, energy consumption is low, the small module can be rapidly heated, desorption work can be accelerated, the small module can be rapidly cooled through the strong cooling structure so that the small module can be rapidly put into use, and the service life of the small module can be prolonged. According to the tetrahydrofuran recycling device, the structure is more compact, the occupied area is smaller, the number of activated carbon absorption towers used is reduced, the equipment cost is low, manual operation is not needed, the automation degree is high, and time and labor are saved; the practicability of the device for recovering tetrahydrofuran is improved.

Description

technical field [0001] The invention relates to the field of treatment equipment containing tetrahydrofuran waste gas, and more particularly, to a device for recycling tetrahydrofuran. Background technique [0002] Tetrahydrofuran is a heterocyclic organic compound with a molecular formula of C4H8O. It belongs to ethers. It is the complete hydrogenation product of the aromatic compound furan. It is a colorless and volatile liquid with an odor similar to ether. The organic liquid with a small viscosity under pressure, the chemical formula of this cyclic ether can be written as (CH2)4O. Because of its long liquid range, it is a commonly used medium polar aprotic solvent. The main use is as a precursor of high molecular polymers. Although the odor and chemical properties of THF are very similar to those of ether, the anesthetic effect is very poor. In industrial production, waste gas containing tetrahydrofuran will be generated. This waste gas needs to be treated with tetrahydr...

AI Technical Summary

Problems solved by technology

[0002]Tetrahydrofuran is a heterocyclic organic compound with molecular formula C4H8O, which belongs to ethers and is the complete hydrogenation product of aromatic compound furan. It is a colorless and volatile liquid, It is an organic liquid that has an ether-like odor, is miscible with water, and has a low viscosity at normal temperature and pressure. The chemical formula of this cyclic ether can be written as (CH2)4O. Because of its long liquid range, it is It is a commonly used medium polar aprotic solvent. Its main purpose is as a precursor of polymers. Although THF has a similar odor and chemical properties to ether, its anesthetic effect is very poor. In industrial production Exhaust gas containing tetrahydrofuran will be produced, and the tetrahydrofuran in this exhaust gas needs to be recovered. Otherwise, it will not only pollute the environment, but also cause a waste of resources

[0003]The existing tetrahydrofuran recovery device is mainly composed of exhaust gas pretreatment, condenser, steam generator and multiple activated carbon absorption towers. When in use, the exhaust gas first passes through the exhaust gas After pretreatment, the exhaust gas enters an activated carbon absorption tower through the pipeline, and then the activated carbon in the activated carbon absorption tower adsorbs and fixes the tetrahydrofuran in the exhaust gas, thereby removing the tetrahydrofuran in the exhaust gas. After working for a period of time in this activated carbon absorption tower, artificial Disconnect the exhaust gas flow of this activated carbon absorption tower and pass the exhaust gas into another activated carbon absorption tower, and then pass high-temperature steam into the first activated carbon absorption tower, and then the tetrahydrofuran on the activated carbon is desorbed by the high temperature of the steam, and then the high-temperature steam Enter the condenser together with THF steam, and then the condenser condenses the high-temperature steam and THF steam into a liquid aqueous solution to complete the recovery of THF, but more activated carbon absorption towers are required, resulting in higher equipment costs and a large footprint. Moreover, it is necessary to manually replace the activated carbon absorption tower, the degree of automation is low, and the operation is time-consuming and laborious. At the same time, the adsorption stroke is short and the purification effect is poor. Therefore, it is urgent to design a device for recovering THF.

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