CN210825993U - Chlorination substitution reaction device - Google Patents
Chlorination substitution reaction device Download PDFInfo
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- CN210825993U CN210825993U CN201922025067.1U CN201922025067U CN210825993U CN 210825993 U CN210825993 U CN 210825993U CN 201922025067 U CN201922025067 U CN 201922025067U CN 210825993 U CN210825993 U CN 210825993U
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Abstract
The utility model discloses a chlorination substitution reaction device, belonging to the technical field of chlorination production devices, which comprises a first-stage chlorination kettle and a second-stage chlorination kettle which are connected in series through a gas pipeline, the first-stage chlorination kettle is sequentially connected with a filter, a buffer tank, a gasifier and a liquid chlorine storage tank through a chlorine gas feeding pipeline, the top of the first-stage chlorination kettle is connected with a first-stage condenser through a reflux pipeline, the top of the first-stage condenser is sequentially connected with a first-stage cold stage, a second-stage cold stage and a cooling absorption tower through a purification pipeline, the cooling absorption tower is connected with a hydrochloric acid collecting tank, the hydrochloric acid collecting tank is sequentially connected with an adsorption device and a hydrochloric acid storage tank, the top of the second-stage chlorination kettle is connected with a second-stage condenser, the top of the second-stage condenser is communicated with the purification pipeline through a pipeline, the bottoms of the first-stage cold stage and the second-stage cold stage are communicated with the return pipeline through circulating pipelines. Realizes the discharge of chlorine-free gas, and refines and recycles the byproduct hydrogen chloride generated by the chlorination reaction.
Description
Technical Field
The utility model relates to a chlorination apparatus for producing technical field, concretely relates to chlorination replaces reaction unit.
Background
In the industrial production process of 1, 2-benzisothiazol-3-ketone (BIT), the process of chlorine chlorination is used for many times, a chlorination kettle can produce a large amount of waste gas in the reaction process, the components of the waste gas mainly comprise unreacted chlorine gas, product materials, hydrogen chloride gas and the like, the chlorine gas is volatile and toxic, if the chlorine gas is directly discharged to the external environment, raw materials are wasted, certain pollution is brought to the external environment, the hydrogen chloride gas can pollute the environment if the air is directly discharged, a simple recovery device is usually arranged behind the chlorination kettle for recovery, however, the recovered hydrochloric acid contains a large amount of impurities, and cannot be directly used for production, further treatment is needed, and a large amount of water resources are wasted.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a chlorination replaces reaction unit, through with the leading-in other chlorination cauldron of one-level chlorination cauldron reaction surplus chlorine, realized no chlorine gas and discharged, and carry out the refined recovery to the accessory substance hydrogen chloride that chlorination reaction produced, reduced air pollution.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a chlorination substitution reaction device comprises a first-stage chlorination kettle and a second-stage chlorination kettle which are connected in series through gas pipelines, wherein a chlorine gas feeding pipeline, an o-chlorobenzyl chloride feeding pipeline and a triethanolamine feeding pipeline are arranged at the top of the first-stage chlorination kettle, the first-stage chlorination kettle is sequentially connected with a filter, a buffer tank, a gasifier and a liquid chlorine storage tank through the chlorine gas feeding pipeline, the top of the first-stage chlorination kettle is connected with a first-stage condenser through a backflow pipeline, the top of the first-stage condenser is sequentially connected with a first-stage cold stage, a second-stage cold stage and a cooling absorption tower through a purification pipeline, the cooling absorption tower is connected with a hydrochloric acid collecting tank through a pipeline, the hydrochloric acid collecting tank is sequentially connected with an adsorption device and a hydrochloric acid storage tank through a pipeline, the top of the second-stage chlorination kettle is connected with, the bottoms of the first-stage cold stage and the second-stage cold stage are communicated with the return pipeline through circulating pipelines.
Preferably, a flowmeter is arranged on the chlorine gas feeding pipeline, and rotameters are arranged on the ortho-chlorobenzyl chloride feeding pipeline and the triethanolamine feeding pipeline.
Preferably, a check valve is arranged on a chlorine gas feeding pipeline between the gasifier and the buffer tank.
Preferably, the adsorption device is filled with activated carbon.
Preferably, all be equipped with the stirring rake in one-level chlorination cauldron and the second grade chlorination cauldron, the stirring rake is by the motor drive of cauldron external portion.
Preferably, the outer walls of the kettle bodies of the first-stage chlorination kettle and the second-stage chlorination kettle are both provided with heating jackets.
The utility model has the advantages of that: the residual chlorine gas generated in the reaction of the first-stage chlorination kettle is introduced into the other chlorination kettle through a gas pipeline and is supplied as a chlorine gas raw material to react with the materials in the chlorination kettle, so that no chlorine gas is discharged, the raw material is saved, in addition, the tail gas carrying the chlorine gas is reduced to enter a subsequent cooling absorption tower, and the product quality of the byproduct hydrochloric acid is improved; after passing through a primary condenser, the gaseous hydrogen chloride and the materials and impurities carried by the gaseous hydrogen chloride flow back into a primary chlorination kettle, the gaseous hydrogen chloride and part of the materials and impurities carried by the gaseous hydrogen chloride are cooled by a primary cold trap and a secondary cold trap, condensed into liquid drops and recycled into the primary chlorination kettle through a circulating pipeline, the gaseous hydrogen chloride and the impurities pass through a cooling absorption tower, are cooled and are circularly absorbed by water in the cooling absorption tower to obtain crude hydrochloric acid, and the crude hydrochloric acid is purified by an adsorption device to obtain a qualified hydrochloric acid product; a check valve is arranged on the chlorine gas feeding pipeline to ensure that the chlorine gas can be only conveyed forwards and prevent backflow; the buffer tank plays a role in balancing pressure, so that the safety of chlorine gas delivery is ensured; the setting of filter can filter chlorine owing to impurity such as iron that the container such as gasifier, buffer tank carried filters, prevents that impurity from getting into the chlorination cauldron, influences going on of chlorination reaction.
Drawings
FIG. 1 is a schematic view of the overall structure of a chlorination reaction apparatus according to the present invention.
In the figure: the system comprises a gas pipeline 1, a primary chlorination kettle 2, a secondary chlorination kettle 3, a chlorine gas feeding pipeline 4, an o-chlorobenzyl chloride feeding pipeline 5, a triethanolamine feeding pipeline 6, a filter 7, a buffer tank 8, a gasifier 9, a liquid chlorine storage tank 10, a reflux pipeline 11, a primary condenser 12, a purification pipeline 13, a primary cold stage 14, a secondary cold stage 15, a cooling absorption tower 16, a hydrochloric acid collecting tank 17, an adsorption device 18, a hydrochloric acid storage tank 19, a secondary condenser 20, a circulation pipeline 21, a flowmeter 22, a rotor flowmeter 23, a check valve 24, a stirring paddle 25 and a heating jacket 26.
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.
The chlorination substitution reaction device shown in fig. 1 comprises a first-stage chlorination kettle 2 and a second-stage chlorination kettle 3 which are connected in series through a gas pipeline 1, wherein a chlorine gas feeding pipeline 4, an o-chlorobenzyl chloride feeding pipeline 5 and a triethanolamine feeding pipeline 6 are arranged at the top of the first-stage chlorination kettle 2, the first-stage chlorination kettle 2 is sequentially connected with a filter 7, a buffer tank 8, a gasifier 9 and a liquid chlorine storage tank 10 through the chlorine gas feeding pipeline 4, the top of the first-stage chlorination kettle 2 is connected with a first-stage condenser 12 through a backflow pipeline 11, the top of the first-stage condenser 12 is sequentially connected with a first-stage cold stage 14, a second-stage cold stage 15 and a cooling absorption tower 16 through a purification pipeline 13, the cooling absorption tower 16 is connected with a hydrochloric acid collecting tank 17 through a pipeline, the hydrochloric acid collecting tank 17 is sequentially connected with an adsorption device 18 and a hydrochloric acid storage tank 19 through a pipeline, the top of the secondary condenser 20 is communicated with the purifying pipeline 13 through a pipeline, and the bottoms of the primary cold stage 14 and the secondary cold stage 15 are communicated with the return pipeline 11 through a circulating pipeline 21.
The chlorine gas feeding pipeline 4 is provided with a flowmeter 22, and the ortho-chlorobenzyl chloride feeding pipeline 5 and the triethanolamine feeding pipeline 6 are both provided with a rotor flowmeter 23. A check valve 24 is arranged on the chlorine gas feeding pipeline 4 between the gasifier 9 and the buffer tank 8. The interior of the adsorption device 18 is filled with activated carbon. All be equipped with stirring rake 25 in one-level chlorination cauldron 2 and the second grade chlorination cauldron 3, stirring rake 25 is by the motor drive of the external portion of cauldron. The outer walls of the kettle bodies of the first-stage chlorination kettle 2 and the second-stage chlorination kettle 3 are both provided with heating jackets 26.
During BIT production, liquid chlorine in the liquid chlorine storage tank 10 is gasified by the gasifier 9, buffered by the buffer tank 8 and filtered by the filter 7, and then enters the first-stage chlorination reactor 2, the o-chlorobenzyl chloride and the triethanolamine solution enter the first-stage chlorination reactor 2 through the o-chlorobenzyl chloride feeding pipeline 5 and the triethanolamine feeding pipeline 6 respectively, and chlorination substitution reaction is performed in the first-stage chlorination reactor 2. The residual chlorine gas generated in the reaction of the first-stage chlorination reactor 2 can be introduced into the second-stage chlorination reactor 3 through the gas pipeline 1 and supplied as a chlorine gas raw material to react with the materials in the first-stage chlorination reactor, so that no chlorine gas is discharged, and the raw materials are saved. The top of the first-stage chlorination kettle 2 is provided with a first-stage condenser 12, gaseous hydrogen chloride and materials and impurities carried by the gaseous hydrogen chloride pass through a return pipeline 11 and the first-stage condenser 12, the materials flow back into the first-stage chlorination kettle 2 (the top of the second-stage chlorination kettle 3 is provided with a second-stage condenser 20, the gaseous hydrogen chloride and the materials and impurities carried by the gaseous hydrogen chloride pass through the second-stage condenser 20, the materials flow back into the second-stage chlorination kettle 3), the gaseous hydrogen chloride and parts of the materials and impurities carried by the gaseous hydrogen chloride further pass through a purification pipeline 13, a first-stage cold trap 14 and a second-stage cold trap 15 for cooling and cooling, the gaseous hydrogen chloride and the impurities condensed into liquid drops are recycled into the first-stage chlorination kettle 2 through a circulating pipeline 21, the gaseous hydrogen chloride and the impurities discharged from an air outlet of the second-stage cold trap 15 pass through a cooling absorption tower 16, the hydrochloric acid is collected by a hydrochloric acid collecting tank 17, purified and decolored by an adsorption device 18 to obtain a qualified hydrochloric acid product, and the qualified hydrochloric acid product is stored by a hydrochloric acid storage tank 19.
The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.
Claims (6)
1. A chlorination substitution reaction device is characterized by comprising a first-stage chlorination kettle and a second-stage chlorination kettle which are connected in series through gas pipelines, wherein a chlorine gas feeding pipeline, an o-chlorobenzyl chloride feeding pipeline and a triethanolamine feeding pipeline are arranged at the top of the first-stage chlorination kettle, the first-stage chlorination kettle is sequentially connected with a filter, a buffer tank, a gasifier and a liquid chlorine storage tank through the chlorine gas feeding pipeline, the top of the first-stage chlorination kettle is connected with a first-stage condenser through a backflow pipeline, the top of the first-stage condenser is sequentially connected with a first-stage cold stage, a second-stage cold stage and a cooling absorption tower through a purification pipeline, the cooling absorption tower is connected with a hydrochloric acid collecting tank through a pipeline, the hydrochloric acid collecting tank is sequentially connected with an adsorption device and a hydrochloric acid storage tank through a pipeline, the top of the second-stage chlorination kettle is connected with a, the bottoms of the first-stage cold stage and the second-stage cold stage are communicated with the return pipeline through circulating pipelines.
2. The chlorination substitution reaction device as claimed in claim 1, wherein a flow meter is provided on the chlorine gas feeding pipe, and rotameters are provided on both the ortho-chlorobenzyl chloride feeding pipe and the triethanolamine feeding pipe.
3. The chlorination substitution reaction device as claimed in claim 1, wherein a check valve is provided on a chlorine gas feed line between the gasifier and the buffer tank.
4. The chlorination reaction device of claim 1, wherein the adsorption device is filled with activated carbon.
5. The chlorination substitution reaction device according to claim 1, wherein stirring paddles are arranged in the first-stage chlorination reactor and the second-stage chlorination reactor, and the stirring paddles are driven by a motor outside the reactor body.
6. The chlorination substitution reaction device as claimed in claim 1, wherein the outer walls of the primary chlorination kettle and the secondary chlorination kettle are provided with heating jackets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922025067.1U CN210825993U (en) | 2019-11-21 | 2019-11-21 | Chlorination substitution reaction device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922025067.1U CN210825993U (en) | 2019-11-21 | 2019-11-21 | Chlorination substitution reaction device |
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| CN210825993U true CN210825993U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173831A (en) * | 2021-04-08 | 2021-07-27 | 宜都市友源实业有限公司 | Production system and process for continuous chlorination of trichlorotoluene |
-
2019
- 2019-11-21 CN CN201922025067.1U patent/CN210825993U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173831A (en) * | 2021-04-08 | 2021-07-27 | 宜都市友源实业有限公司 | Production system and process for continuous chlorination of trichlorotoluene |
| CN113173831B (en) * | 2021-04-08 | 2024-01-19 | 宜都市友源实业有限公司 | Production system and process for continuous chlorination of trichlorotoluene |
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