Vacuum desorption system and method for adsorption and recovery of organic solvent

An organic solvent, adsorption recovery technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of losing the meaning of purging, the desorption speed cannot be achieved, and the vacuum degree value of the adsorption bed cannot be guaranteed. Achieve the effect of improving flow rate and desorption speed, realizing desorption speed and running cost balance

Inactive Publication Date: 2014-06-04
赵胜
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  • Abstract
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Problems solved by technology

Its disadvantages are: 1. The vacuum desorption device adopts a single-stage vacuum pump, the flow rate of the vacuum pump is difficult to meet the desorption requirements, and the desorption speed cannot be balanced with the adsorption speed; 2. When the adsorption bed is purged with nitrogen in the later stage of vacuum desorption , cannot guarantee that the adsorption bed maintains a certain vacuum value, which may lose the meaning of purging, and even make the vacuum desorption system not operate normally

Method used

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  • Vacuum desorption system and method for adsorption and recovery of organic solvent

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Embodiment 1

[0027] Vacuum desorption system for adsorption and recovery of organic solvents, including an adsorption bed for organic solvents, a nitrogen purging device for the adsorption bed, a vacuum desorption device for desorbing the adsorption bed, and a condensation unit for recovering the desorbed organic solvent The recovery device, the vacuum desorption device is composed of two-stage vacuum pumps connected in series, and the flow rate of the two-stage vacuum pumps is configured to decrease in proportion.

[0028] The flow rate and desorption speed of the vacuum desorption system can be greatly increased by connecting the two-stage vacuum pump configured with a proportional decrease in flow rate, so as to achieve a balance between the desorption rate and the adsorption rate. However, in order to meet the requirement of desorption flow rate in this configuration, at least one level of vacuum pump is required to have a large flow rate, and the energy consumption is high.

Embodiment 2

[0030] Such as figure 1 As shown, the vacuum desorption system for adsorption and recovery of organic solvents includes an adsorption bed for organic solvents, a nitrogen purging device for the adsorption bed, a vacuum desorption device for desorbing the adsorption bed, and a desorption process for the desorbed organic solvent. The recovered condensation recovery device, the vacuum desorption device is formed by three-stage vacuum pumps connected in series; the adsorption bed is connected to the first-stage Roots vacuum pump, the first-stage Roots vacuum pump is connected to the second-stage Roots vacuum pump, and the second-stage Roots vacuum pump The vacuum pump is connected to the third-stage vacuum pump, and the third-stage vacuum pump is connected to the condensation recovery device; the flow configuration of the third-stage vacuum pump is: (15-20): (3-5):1. The second-stage Roots vacuum pump is an air-cooled Roots vacuum pump, which is self-cooled through a condenser arr...

Embodiment 3

[0040] Vacuum desorption system for adsorption and recovery of organic solvents, including an adsorption bed for organic solvents, a nitrogen purging device for the adsorption bed, a vacuum desorption device for desorbing the adsorption bed, and a condensation unit for recovering the desorbed organic solvent The recovery device, the vacuum desorption device is a vacuum pump group composed of four-stage vacuum pumps connected in series, and the flow rate of the four-stage vacuum pumps is configured to decrease in proportion.

[0041] Higher vacuum desorption system flow rate and desorption speed can be achieved by connecting four vacuum pumps in series.

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Abstract

The invention discloses a vacuum desorption system and method for adsorption and recovery of an organic solvent, and relates to an organic solvent adsorption and recovery system applied in industries such as medicines, petrochemical engineering and novel materials. The vacuum desorption system comprises an adsorption bed of the organic solvent, a nitrogen purging apparatus for the adsorption bed, a vacuum desorption apparatus for desorbing the adsorption bed, and a condensation and recovery apparatus for recovering the desorbed organic solvent. The vacuum desorption system is formed by connecting multi-stage vacuum pumps in series. The multi-stage vacuum pumps are arranged in an order of descending proportions of flow rate. By connecting the multi-stage vacuum pumps arranged in the order of descending proportions of the flow rate in series, the flow rate and the desorption speed of the vacuum desorption system can be greatly increased, thereby realizing the balance between the desorption speed and the adsorption speed.

Description

technical field [0001] The invention relates to a desorption system and method for adsorption and recovery of organic solvents, in particular to a vacuum desorption system and method for adsorption and recovery of organic solvents. Background technique [0002] In the organic solvent adsorption recovery system used in the pharmaceutical, petrochemical, new materials and other industries, a large amount of low-pressure water vapor is used for desorption, which consumes a lot of energy and has low economic benefits; under this circumstance, many companies have tried the vacuum desorption process , and made and installed many sets of vacuum desorption systems. The existing vacuum desorption system comprises an adsorption bed of organic solvent, a nitrogen purging device for the adsorption bed, a vacuum desorption device for desorbing the adsorption bed, and a condensation recovery device for recovering the desorbed organic solvent; The function of the nitrogen purging device i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/02
Inventor 赵胜崔贵芹
Owner 赵胜
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