CN210993053U

CN210993053U - A chlorobenzene recovery unit for BIT production

Info

Publication number: CN210993053U
Application number: CN201921956303.5U
Authority: CN
Inventors: 戴明本
Original assignee: Shouguang Syntech Fine Chemical Co ltd
Current assignee: Shouguang Syntech Fine Chemical Co ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-07-14
Anticipated expiration: 2029-11-13

Abstract

The utility model discloses a chlorobenzene recovery unit for BIT production, it belongs to chlorobenzene recovery unit technical field, including the stills, the upper end of stills is equipped with the outlet duct, the outlet duct is connected with the separator tube, the separator tube is connected with the condenser pipe, the condenser pipe is connected with the storage jar; the separating tube is designed into a V shape, a plurality of heating sheets are arranged on the separating tube and along the direction from the air outlet tube to the condensing tube, the heating temperature of the heating sheets is sequentially reduced along the direction from the air outlet tube to the condensing tube, the lowest end of the separating tube is provided with a recovery pipeline, and the recovery pipeline is connected with a recovery tank; the utility model discloses utilize the separator tube of V font can be effectively with the impurity and the chlorobenzene separation of boiling point higher than chlorobenzene among the distillation process, simple structure, convenient operation, chlorobenzene in the residue that can be effectual in the recovery BIT production process to can recycle other impurity recycling in the residue.

Description

A chlorobenzene recovery unit for BIT production

Technical Field

The utility model relates to a chlorobenzene recovery unit technical field, concretely relates to chlorobenzene recovery unit for BIT production.

Background

The English name of BIT is 1,2-Benzisothiazol-3(2H) -one, the Chinese name is 1, 2-Benzisothiazol-3-one, the liquid state is dissolved in an organic solvent and is slightly soluble in water, the agent is a main industrial sterilization, anticorrosion and enzyme inhibitor, has outstanding function of inhibiting the breeding of microorganisms such as mold (fungi and bacteria) and algae in an organic medium, and solves a series of problems of mildew, fermentation, deterioration, emulsion breaking, odor generation and the like of organic products caused by the breeding of the microorganisms. BIT is widely used in latex products, water-soluble resins, paints (emulsion paints), acrylic polymers, polyurethane photographic lotions, paper, inks, leather, lubricants, and the like.

The production process of BIT mainly comprises the procedures of chlorination substitution, ammonolysis, rectification, condensation, cyclization, washing centrifugation, azeotropic desolventizing, finished product centrifugation and washing and the like, a large amount of waste water can be generated in the procedures of ammonolysis, condensation, washing centrifugation and the like, certain chlorobenzene can be contained in the waste water, the waste water can be directly treated by a sewage station in the existing production procedure, and the chlorobenzene in the waste water can not be recycled, so that the waste of resources is caused. The recovery of chlorobenzene is usually carried out by distillation, but the above-mentioned waste water contains other impurities having a boiling point higher than that of chlorobenzene, and it is difficult to recover pure chlorobenzene by conventional distillation means.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a pair of a chlorobenzene recovery unit for BIT production, simple structure, convenient operation can effectually retrieve the chlorobenzene in the residue in the BIT production process to can recycle other impurity recovery in the residue.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a chlorobenzene recovery device for BIT production comprises a distillation still, wherein the upper end of the distillation still is provided with an air outlet pipe, the air outlet pipe is connected with a separation pipe, the separation pipe is connected with a condensation pipe, and the condensation pipe is connected with a storage tank; the separating tube is established to the V font, on the separating tube, follow the outlet duct arrives be equipped with a plurality of heating plates in the direction of condenser pipe, the heating temperature of heating plate is followed the outlet duct arrives the direction of condenser pipe reduces in proper order, the least significant end of separating tube is equipped with the recovery pipeline, the recovery pipeline is connected with the recovery jar.

As a preferable technical scheme, a plurality of spoilers are uniformly distributed on the inner wall of the separation pipe.

As a preferred technical scheme, a return pipeline communicated with the distillation still is arranged on the side wall of the recovery tank, and a discharge pipeline is arranged at the bottom of the recovery tank.

As a preferable technical solution, the number of the heating sheets is four, and the heating sheets are symmetrically distributed on the separation tube.

As a preferable technical scheme, the temperature difference between the adjacent heating sheets is 15-25 ℃.

The utility model has the advantages of that:

the utility model discloses utilize the separator tube of V font can be effectively with the impurity and the chlorobenzene separation of boiling point higher than chlorobenzene among the distillation process, simple structure, convenient operation, chlorobenzene in the residue that can be effectual in the recovery BIT production process to can recycle other impurity recycling in the residue.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1-a distillation still, 2-an air outlet pipe, 3-a heating sheet, 4-a separation pipe, 5-a condensation pipe, 6-a storage tank, 7-a spoiler, 8-a recovery pipeline, 9-a recovery tank, 10-a discharge pipeline and 11-a reflux pipeline.

Detailed Description

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a chlorobenzene recovery device for BIT production, which comprises a distillation still 1, wherein the upper end of the distillation still 1 is provided with an air outlet pipe 2, the air outlet pipe 2 is connected with a separation pipe 4, the separation pipe 4 is connected with a condensation pipe 5, and the condensation pipe 5 is connected with a storage tank 6; the separating tube 4 is designed into a V shape, a plurality of heating sheets 3 are arranged on the separating tube 4 along the direction from the air outlet tube 2 to the condensing tube 5, the heating temperature of the heating sheets 3 is sequentially reduced along the direction from the air outlet tube 2 to the condensing tube 5, the lowest end of the separating tube 4 is provided with a recovery pipeline 8, and the recovery pipeline 8 is connected with a recovery tank; the chlorobenzene is evaporated from the residue by the distillation of the distillation kettle 1 (the distillation temperature is generally 160 ℃ to 210 ℃), the steam contains not only the chlorobenzene but also a large amount of impurities with boiling points higher than that of the chlorobenzene, the steam enters the separation tube 4 along the gas outlet tube 2, the heating temperature of the heating sheet 3 closest to the gas outlet tube 2 is not lower than 160 ℃ (generally 200 ℃), the heating temperature of the heating sheet 3 closest to the condensation tube 5 is not higher than 135 ℃ (generally 133 ℃), and the temperature in the separation tube 4 is gradually reduced so that the impurities with high boiling points are condensed and separated from the chlorobenzene in the separation tube 4; the impurities can flow along the recovery pipe 8 into the recovery tank for reuse.

Furthermore, a plurality of spoilers 7 are uniformly distributed on the inner wall of the separating pipe 4, and the spoilers 7 can disturb the flow of the steam, so that the condensation effect of impurities in the steam is improved.

Furthermore, be equipped with the backflow pipeline 11 with stills 1 intercommunication on the lateral wall of recovery tank, the bottom of recovery tank is equipped with ejection of compact pipeline 10, still can also have a small amount of chlorobenzene in the impurity in the recovery tank generally to the density of impurity is higher than the chlorobenzene, can further retrieve chlorobenzene when flowing into stills 1 through backflow pipeline 11 with the upper liquid in the recovery tank.

Further, the four heating plates 3 are provided, the heating plates 3 are symmetrically distributed on the separation tube 4, and the temperatures of the four heating plates 3 may be set to 200 ℃, 179 ℃, 158 ℃, 133 ℃ in this order.

Further, the temperature difference between the adjacent heating sheets 3 is 15 to 25 ℃.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The chlorobenzene recovery device for BIT production is characterized by comprising a distillation kettle, wherein an air outlet pipe is arranged at the upper end of the distillation kettle and is connected with a separation pipe, the separation pipe is connected with a condensation pipe, and the condensation pipe is connected with a storage tank; the separating tube is established to the V font, on the separating tube, follow the outlet duct arrives be equipped with a plurality of heating plates in the direction of condenser pipe, the heating temperature of heating plate is followed the outlet duct arrives the direction of condenser pipe reduces in proper order, the least significant end of separating tube is equipped with the recovery pipeline, the recovery pipeline is connected with the recovery jar.

2. The chlorobenzene recovery apparatus for BIT production according to claim 1, wherein a plurality of spoilers are uniformly distributed on the inner wall of the separation tube.

3. The chlorobenzene recovery device for BIT production as claimed in claim 1, wherein a reflux pipeline communicated with the distillation still is arranged on the side wall of the recovery tank, and a discharge pipeline is arranged at the bottom of the recovery tank.

4. The chlorobenzene recycling device for BIT production according to claim 1, wherein the heating plates are four heating plates, and the heating plates are symmetrically distributed on the separation tube.

5. The apparatus as claimed in claim 1, wherein the temperature difference between adjacent heating plates is 15-25 ℃.