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Organic solvent recovery apparatus for increasing recovery quality, method and uses thereof

A technology for organic solvents and recovery devices, applied in organic chemistry, separation methods, chemical instruments and methods, etc., can solve problems such as cost, recovery solvent purification difficulties, reduction of recovery solvent purity, PH value and reuse value, etc., to achieve improvement The effect of recycled quality

Active Publication Date: 2013-04-03
JG ENVIRONMENTAL TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] However, the desorption gas input from the desorption gas source 60 into the desorption tower 40 is not only used to desorb the organic gas adsorbed in the adsorption material 30, but also reduce the oxygen content in the desorption tower 40. To ensure the operational safety of the desorption tower 40, the oxygen content is usually controlled at about 2.5-5%; however, if the desorbed organic gas has the benefit of being recycled into a solvent for reuse , the recovered solvent may deteriorate in consideration of the safe oxygen content (for example: methyl ethyl ketone (MEK) will be oxidized and acidified, ethyl acetate (EAC) will be hydrolyzed and acidified), thus reducing the recovery of solvent The purity, PH value and reuse value, and further cause the difficulty and cost of recovery solvent purification

Method used

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  • Organic solvent recovery apparatus for increasing recovery quality, method and uses thereof
  • Organic solvent recovery apparatus for increasing recovery quality, method and uses thereof
  • Organic solvent recovery apparatus for increasing recovery quality, method and uses thereof

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Embodiment Construction

[0046] First, see figure 2 Shown, recovery device of the present invention comprises:

[0047]An adsorption tower 10, the bottom is provided with an organic waste gas inlet 13, and this organic waste gas inlet 13 can be further provided with a humidity control unit 80 (in order to control the relative humidity of the waste gas entering the adsorption tower 10 below 60% RH, more preferably 45% Below RH), the top is provided with a purified gas outlet 15, and the inside is divided into several layers by a porous plate 11 and a storage tank 16 is formed at the bottom, which is sent to the bottom of the adsorption tower 10 from the organic waste gas inlet 13 with the waste gas blower 14, while the organic After the exhaust gas is dispersed by the airflow dispersion plate 12, the adsorbent material 30 falling from the top forms a floating layer above each of the porous plates 11, and falls to the storage tank 16 along the opening side of each of the porous plates 11 layer by layer...

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Abstract

The invention relates to an organic solvent recovery apparatus for increasing recovery quality, a method and uses thereof. The recovery method comprises: an absorption process, wherein an absorption material is adopted to absorb organic waste gas; a desorption process, wherein a desorption air stream is adopted to desorb the organic waste gas absorbed by the absorption material; an oxygen content control process, wherein an oxygen content of the air stream during desorption or after desorption is maintained to less than 1.5%, more preferably less than 0.5%; and a condensation recovery process, wherein high concentration organic gas in the desorbed air stream is subjected to condensation recovery. According to the apparatus and the method, the efficacy that the oxygen content of the desorption process is controlled so as to increase solvent recovery quality is provided.

Description

technical field [0001] The present invention relates to a desorption process of an organic solvent under low oxygen content conditions, thereby greatly reducing the design of the degradation degree of the organic solvent by the oxidation reaction, in particular to an organic solvent recovery device, method and application for improving the recovery quality . Background technique [0002] Adsorption and purification technology for removing volatile organic gases (Volatile Organic Compounds, VOCs) by adsorption using adsorbent materials with high porosity and high specific surface area, such as figure 1 The fluidized floating bed purification system shown is a common organic waste gas purification system, which sends the waste gas fan 14 from the organic waste gas inlet 13 to the bottom of the adsorption tower 10, and the organic waste gas is dispersed by the airflow dispersion plate 12, and When the adsorbent material 30 falling from the top comes into contact with it, it be...

Claims

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Application Information

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IPC IPC(8): B01D53/12B01D5/00C07C67/48C07C69/12C07C45/78C07C49/04
Inventor 张丰堂
Owner JG ENVIRONMENTAL TECH
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