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Regeneration method of chlorobenzene production wastewater adsorption resin

A technology for the production of waste water and adsorption resin, applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of reduced adsorption performance, reduced regeneration effect, low resin regeneration rate, etc., to reduce resin temperature and avoid recycling Effects of treatment steps and improvement of regeneration rate

Inactive Publication Date: 2019-09-20
JIANGSU NJU ENVIRONMENTAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The steam desorption method adopted in the prior art has better desorption effect in nitrochlorobenzene production wastewater, but this method is not suitable for the desorption of chlorobenzene production wastewater. The present invention aims at adsorption resin in chlorine Under the long-term use of adsorption-desorption in the treatment of benzene production wastewater, the adsorption performance decreases rapidly, and the regeneration effect gradually decreases significantly with the increase of the number of uses, that is, the problem of low resin regeneration rate. The present invention provides a chlorobenzene production wastewater Regeneration method of adsorption resin

Method used

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  • Regeneration method of chlorobenzene production wastewater adsorption resin

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Embodiment 1

[0037] The design of this embodiment is mainly for resin adsorption process design, and the treatment capacity is designed according to the treatment scale of 300t / d. The resin adsorption unit is mainly divided into two parts: resin adsorption system and desorption system. The resin adsorption system is divided into 3 adsorption towers, and each adsorption tower requires about 7.5m resin 3 , a total of about 22.5m 3 . The resin adsorption area needs to be equipped with operating platforms, canopies and other rain and sun protection measures.

[0038] The chlorobenzene production wastewater used in this embodiment contains 300-700 mg / L of benzene, 100-400 mg / L of chlorobenzene, and 20-100 mg / L of polychlorobenzene.

[0039] Such as figure 1 Shown, a kind of chlorobenzene of the present invention produces the regeneration method of waste water adsorption resin, comprises the following steps:

[0040]1) Using a quartz sand filter to pre-filter the chlorobenzene production wa...

Embodiment 2

[0048] The design of this embodiment is mainly for resin adsorption process design, and the treatment capacity is designed according to the treatment scale of 300t / d. The resin adsorption unit is mainly divided into two parts: resin adsorption system and desorption system. The resin adsorption system is divided into 3 adsorption towers, and each adsorption tower requires about 7.5m resin 3 , a total of about 22.5m 3 . The resin adsorption area needs to be equipped with operating platforms, canopies and other rain and sun protection measures.

[0049] The chlorobenzene production wastewater used in this embodiment contains 300-700 mg / L of benzene, 100-400 mg / L of chlorobenzene, and 20-100 mg / L of polychlorobenzene.

[0050] Such as figure 1 Shown, a kind of chlorobenzene of the present invention produces the regeneration method of waste water adsorption resin, comprises the following steps:

[0051] 1) Using a quartz sand filter to pre-filter the chlorobenzene production w...

Embodiment 3

[0057] The design of this embodiment is mainly for resin adsorption process design, and the treatment capacity is designed according to the treatment scale of 300t / d. The resin adsorption unit is mainly divided into two parts: resin adsorption system and desorption system. The resin adsorption system is divided into 3 adsorption towers, and each adsorption tower requires about 7.5m resin 3 , a total of about 22.5m 3 . The resin adsorption area needs to be equipped with operating platforms, canopies and other rain and sun protection measures.

[0058] The chlorobenzene production wastewater used in this embodiment contains 300-700 mg / L of benzene, 100-400 mg / L of chlorobenzene, and 20-100 mg / L of polychlorobenzene.

[0059] Such as figure 1 Shown, a kind of chlorobenzene of the present invention produces the regeneration method of waste water adsorption resin, comprises the following steps:

[0060] 1) Using a quartz sand filter to pre-filter the chlorobenzene production w...

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Abstract

The invention discloses a regeneration method of adsorption resin for chlorobenzene production wastewater, and belongs to the field of resin regeneration. The method comprises the following steps: 1) carrying out solid particle impurity removal treatment on chlorobenzene production wastewater; 2) separating organic matters from the wastewater treated in the step 1) through resin adsorption; (3) carrying out primary desorption on the adsorbed resin by adopting water vapor, so that benzene and chlorobenzene with relatively low boiling points are stripped by the water vapor and are treated by a condenser and an oil-water separator to form an oil layer; (4) carrying out secondary desorption on the high-boiling-point organic matters remained and adsorbed on the resin treated in the step (3) by adopting a chlorobenzene production raw material, benzene, as a desorption agent; and 5) carrying out third desorption on the resin treated in the step 4) by adopting water vapor, finally combining the obtained oil layer with the desorption liquid oil layers in the step 3) and the step 4), feeding the mixture into a rectifying tower for separation, and using the obtained water layer for absorbing HCl tail gas in the chlorobenzene production process. According to the method, high-boiling residues adsorbed in the resin can be effectively removed, and the regeneration rate of the resin is increased.

Description

technical field [0001] The invention belongs to the field of resin regeneration, and more specifically relates to a method for regeneration of an adsorption resin for chlorobenzene production waste water. Background technique [0002] Chlorobenzene is an important chemical raw material. The production of chlorobenzene uses benzene and chlorine gas as raw materials. Under the action of iron rings, it is produced through substitution reaction. The crude chlorobenzene product is washed with water and alkali. It is obtained through rectification and purification. The waste water after washing contains not only raw material benzene and product chlorobenzene, but also various by-products such as dichlorobenzene and polychlorobenzene. [0003] For the treatment of this kind of wastewater, activated carbon adsorption and resin adsorption technology are generally used. The treatment effect of activated carbon adsorption technology is better, but there are disadvantages such as diffic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34C02F1/28C02F103/36C02F101/36
CPCB01J20/3466B01J20/3475B01J20/3425B01J20/3458C02F1/285C02F2303/16C02F2103/36C02F2101/36
Inventor 王宁吕振华张炜铭朱兆坚林原周兵郭孝虎翟廷婷阮志伟
Owner JIANGSU NJU ENVIRONMENTAL TECH