CN214551277U - Benzyl chloride rectifying column belt cleaning device - Google Patents
Benzyl chloride rectifying column belt cleaning device Download PDFInfo
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- CN214551277U CN214551277U CN202120287172.7U CN202120287172U CN214551277U CN 214551277 U CN214551277 U CN 214551277U CN 202120287172 U CN202120287172 U CN 202120287172U CN 214551277 U CN214551277 U CN 214551277U
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- rectification column
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Abstract
The utility model relates to the field of rectifying tower cleaning, in particular to a benzyl chloride rectifying tower cleaning device, which comprises a liquid storage tank, a rectifying tower, a heat exchanger and a reflux tank; the liquid storage pot is divided into three-layer structure by last to lower, constitutes toluene liquid reserve room, soda stock solution reserve room and desalinized water liquid reserve room, stores toluene, soda and desalinized water solution respectively, and three-layer liquid reserve room mutual independence, and be sealed cavity. The utility model provides a benzyl chloride rectifying column belt cleaning device is through setting up the liquid storage pot to with the liquid storage pot subdivision in three cavity, realize carrying the transport of toluene, soda ash, three kinds of lotions of desalinized water in to the rectifying column, make full use of material component conversion and chemical characteristic, effectively turn into the intractable benzyl chloride into the disposable component, do not produce new danger source in the cleaning process.
Description
Technical Field
The utility model relates to a rectifying column washs the field, concretely relates to benzyl chloride rectifying column belt cleaning device.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
Benzyl chloride is an important chemical raw material and is widely used in the production of medicines, dyes, perfumes, plasticizers, synthetic resins and other benzyl-containing compounds. In the production of benzyl chloride, a rectifying tower is required to be adopted for preparation, and in the process of long-term continuous operation, benzyl chloride can be gradually adhered to and accumulated on a filler, the filler has a blocking phenomenon, the gas-liquid separation effect of the rectifying tower is influenced, the heat transfer efficiency and the mass transfer efficiency are reduced, and the normal operation of the rectifying tower is influenced in severe cases. Therefore, the benzyl chloride rectifying tower needs to be cleaned regularly to remove the adhesive on the packing and restore the working condition of the rectifying tower.
In the prior art, the traditional cleaning method comprises the following steps: the disassembly-cleaning-assembly mode needs large-scale hoisting equipment for disassembly, has high labor intensity, consumes a large amount of labor, is long in time, has high cost and has great influence on production.
SUMMERY OF THE UTILITY MODEL
The utility model provides a benzyl chloride rectifying column belt cleaning device, the device have avoided large-scale hoisting equipment's use, and low in labor strength, cleaning efficiency are high, and occupation time limit for a project is short, practices thrift the cost.
In order to realize the purpose, the utility model provides a benzyl chloride rectifying tower cleaning device, which comprises a liquid storage tank, a rectifying tower, a heat exchanger and a reflux tank;
the liquid storage pot is divided into three-layer structure by last to lower, constitutes toluene liquid reserve room, soda stock solution reserve room and desalinized water liquid reserve room, stores toluene, soda and desalinized water solution respectively, and three-layer liquid reserve room mutual independence, and be sealed cavity.
One or more embodiments of the present invention have the following advantageous effects:
1) the utility model provides a benzyl chloride rectifying column belt cleaning device only has realized the washing to the filler formula rectifying column promptly through addding a liquid storage pot and several extra pipelines, need not use large-scale lifting device, reduces a large amount of equipment and labour cost, has higher economic benefits.
2) The utility model provides a benzyl chloride rectifying column belt cleaning device utilizes the similar compatible principle of organic solvent on the one hand, uses the toluene that does not have the system pollution to wash rectifying column filler, utilizes toluene to get rid of the benzyl chloride that has pungent smell in the filler, and the washing liquid can be retrieved to system reuse; on the other hand, the chemical reaction is utilized to carry out substance conversion (the principle that benzyl chloride reacts with sodium carbonate to generate benzyl alcohol), benzyl chloride with strong pungent smell reacts to generate benzyl alcohol, and the characteristic that benzyl alcohol is easy to dissolve in water is utilized to wash the rectifying tower with water, so that the condition of disassembly and inspection is achieved.
3) The utility model provides a benzyl chloride rectifying column belt cleaning device is through setting up the liquid storage pot to with the liquid storage pot subdivision in three cavity, realize carrying the transport of toluene, soda ash, three kinds of lotions of desalinized water in to the rectifying column, make full use of material component conversion and chemical characteristic, effectively turn into the intractable benzyl chloride into the disposable component, do not produce new danger source in the cleaning process.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
FIG. 1 is a schematic structural diagram of a benzyl chloride rectification column cleaning device provided in example 1;
the system comprises a toluene storage chamber 1, a soda ash storage chamber 2, a desalted water storage chamber 3, a first valve 4, a second valve 5, a third valve 6, a feeding pump 7, a rectifying tower 8, a reboiler 9, a solution analyzer 10, a nitrogen pump 11, a first heat exchanger 12, a second heat exchanger 13, a reflux tank 14, a post-treatment device 15, a manhole 16 and a reflux pump 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
As described in the background, the conventional method for cleaning the benzyl chloride rectification column in the prior art is as follows: the disassembly-cleaning-assembly mode needs large-scale hoisting equipment for disassembly, has high labor intensity, consumes a large amount of labor, is long in time, has high cost and has great influence on production. In order to solve the problem, the utility model provides a benzyl chloride rectifying tower cleaning device, which comprises a liquid storage tank, a rectifying tower, a heat exchanger and a reflux tank; the liquid storage pot is divided into three-layer structure by last to lower, constitutes toluene liquid reserve room, soda stock solution reserve room and desalinized water liquid reserve room, stores toluene, soda and desalinized water solution respectively, and three-layer liquid reserve room mutual independence, and be sealed cavity.
The utility model discloses an among one or more embodiments, toluene liquid reserve chamber, soda liquid reserve chamber and demineralized water liquid reserve chamber all are provided with a liquid outlet, are provided with the circulation of valve control liquid on the pipeline that every liquid outlet is connected respectively.
The utility model discloses an among one or more embodiments, be provided with the charge pump between liquid storage pot and the rectifying column, liquid in the liquid storage pot is sent into in the rectifying column through the charge pump behind the valve.
The liquid storage tank is divided into three chambers for storing three washing liquids of methylbenzene, soda ash and desalted water, so that the dissolution and conversion characteristics of material components are fully utilized, and the benzyl chloride which is difficult to process is effectively converted into components which are easy to process. According to the principle of 'similarity and compatibility', methylbenzene can dissolve benzyl chloride, methylbenzene is used for removing most of benzyl chloride in the filler, and cleaning fluid can be recycled to a system for recycling; the application of the sodium carbonate is based on the principle that benzyl chloride reacts with the sodium carbonate to generate benzyl alcohol, the sodium carbonate can convert the benzyl chloride into the benzyl alcohol, and the benzyl alcohol can be removed by introducing desalted water into the rectifying tower subsequently by utilizing the characteristic that the benzyl alcohol is easy to dissolve in water.
The utility model discloses an among one or more embodiments, the rectifying column bottom is provided with the reboiler, and the effect of reboiler is at toluene washing rectifying column in-process, provides the heat, realizes the backward flow of washing liquid.
The utility model discloses an among one or more embodiments, the rectifying column bottom is connected with the nitrogen pump, and the setting of nitrogen pump can fill nitrogen gas into the rectifying column tower cauldron after the rectifying column water washing finishes, carries out the nitrogen gas replacement, further clears away the remaining steam in the rectifying column.
In one or more embodiments of the present invention, the outlet end of the bottom of the rectifying tower is connected to a reflux pump, the outlet end of the reflux pump is connected to the inlet of the feed pump, and the inlet of the reflux pump is provided with a solution analyzer; the reflux pump is arranged to enable the toluene cleaning liquid to return to the system for reuse, the solution analyzer is used for analyzing components of the cleaning liquid flowing out of the tower bottom outlet of the rectifying tower, and the opening and closing of the first valve, the second valve and the third valve are controlled through a result displayed by the solution analyzer. The utility model discloses do not do special restriction to solution analysis appearance here, as long as can detect the instrument of solution composition all can regard as solution analysis appearance to be used in this device.
The utility model discloses an among one or more embodiments, rectifying column tower top opening end is connected with first heat exchanger, second heat exchanger and reflux drum in order, can collect the reflux drum with the gas cooling in the rectifying column in, handles.
In one or more embodiments of the present invention, the concentration of soda ash is 10% by mass.
The utility model discloses an among one or more embodiments, the backward flow jar is connected with aftertreatment device, separates the liquid in the backward flow jar and recycles.
The utility model discloses an in one or more embodiment, be provided with the manhole on the rectifying column, follow-up forced draft is carried out to the accessible manhole.
Example 1
As shown in fig. 1, the utility model provides a benzyl chloride rectifying tower cleaning device, which comprises a liquid storage tank, a rectifying tower 8, a heat exchanger and a reflux tank 14; the liquid storage tank is divided into three chambers, namely a toluene liquid storage chamber 1, a soda liquid storage chamber 2 and a desalted water liquid storage chamber 3 from top to bottom, and is used for storing toluene, soda with the mass concentration of 10% and desalted water respectively, and the three layers of liquid storage chambers are mutually independent and are all sealed chambers;
the toluene liquid storage chamber 1, the soda liquid storage chamber 2 and the desalted water liquid storage chamber 3 are respectively provided with a liquid outlet, and a pipeline connected with each liquid outlet is respectively provided with a first valve 4, a second valve 5 and a third valve 6; the circulation of each liquid in the liquid storage tank is controlled by a valve. A feeding pump 7 is arranged between the liquid storage tank and the rectifying tower 8, and the liquid in the liquid storage tank is sent into the rectifying tower 8 through the feeding pump 7 after passing through a valve.
A manhole 16 is arranged on the rectifying tower 8, a reboiler 9 is arranged at the bottom of the rectifying tower 8, and the bottom of the rectifying tower is connected with a nitrogen pump 11;
the outlet end of the bottom of the rectifying tower 8 is connected with a reflux pump 17, the outlet end of the reflux pump 17 is connected to the inlet of the feed pump 7, and a solution analyzer 10 is arranged at the inlet of the reflux pump;
the outlet end of the top of the rectifying tower 8 is connected with a first heat exchanger 12, a second heat exchanger 13, a reflux tank 14 and a post-treatment device 15 in sequence.
The working principle is as follows:
firstly, keeping the second valve and the third valve closed, opening the first valve, feeding a toluene solution into a rectifying tower by a feeding pump, controlling the reflux amount to be about 12t/h under the action of a reboiler, returning a cleaning solution at the bottom outlet end of the rectifying tower to a system for reuse under the action of the reflux pump, simultaneously detecting the content of benzyl chloride in the cleaning solution by a solution analyzer arranged at the inlet of the reflux pump, closing the first valve and opening the second valve when the content of the benzyl chloride in the cleaning solution is less than 0.5 percent, allowing a soda solution in a soda solution storage chamber to pass through the second valve, feeding the soda solution and the cleaning solution refluxed in the last step into the rectifying tower under the delivery of the feeding pump for refluxing, continuously circulating a tower bottom cleaning solution in the system, analyzing the soda content in the cleaning solution by the solution analyzer, closing the second valve when the soda content in the cleaning solution is unchanged, collecting cleaning liquid from the bottom outlet end of the rectifying tower without circulating, then opening a third valve, adding desalted water into the rectifying tower, washing for 6 hours, closing the third valve, steaming the materials in the tower kettle to the top of the rectifying tower under the condition of atmospheric distillation, collecting the materials in the tower kettle in a reflux tank through a first heat exchanger and a second heat exchanger, draining the residual water in the tower kettle, and separating and recycling the liquid in the reflux tank by using a post-treatment device.
And finally, after the rectifying tower is washed with water, filling nitrogen into the tower kettle, performing nitrogen replacement, further removing residual steam in the rectifying tower, and then performing forced ventilation through a manhole of the rectifying tower.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.
Claims (10)
1. A benzyl chloride rectifying tower cleaning device is characterized by comprising a liquid storage tank, a rectifying tower, a heat exchanger and a reflux tank;
the liquid storage pot is divided into three-layer structure by last to lower, constitutes toluene liquid reserve room, soda stock solution reserve room and desalinized water liquid reserve room, stores toluene, soda and desalinized water solution respectively, and three-layer liquid reserve room mutual independence, and be sealed cavity.
2. The benzyl chloride rectification column cleaning device as claimed in claim 1, wherein the toluene liquid storage chamber, the soda ash liquid storage chamber and the desalted water storage chamber are provided with a liquid outlet, and a pipeline connected with each liquid outlet is respectively provided with a valve for controlling the circulation of liquid, and the valve is respectively a first valve, a second valve and a third valve.
3. The benzyl chloride rectification column cleaning device as claimed in claim 2, wherein a feed pump is arranged between the liquid storage tank and the rectification column, and liquid in the liquid storage tank passes through a valve and then is fed into the rectification column through the feed pump.
4. Benzyl chloride rectification column cleaning apparatus as claimed in claim 1, characterized in that a reboiler is provided at the bottom of the rectification column.
5. The benzyl chloride rectification column cleaning device as claimed in claim 1, wherein a nitrogen pump is connected to the bottom of the rectification column.
6. The benzyl chloride rectification column cleaning device according to claim 3, wherein the outlet end of the bottom of the rectification column is connected with a reflux pump, the outlet end of the reflux pump is connected with the inlet of a feed pump, and a solution analyzer is arranged at the inlet of the reflux pump.
7. The benzyl chloride rectification column cleaning device as claimed in claim 1, wherein a first heat exchanger, a second heat exchanger and a reflux tank are connected to the top outlet end of the rectification column in sequence.
8. The benzyl chloride rectification column cleaning device of claim 1, wherein the concentration of the soda ash is 10% by mass.
9. The benzyl chloride rectification column cleaning device of claim 7, wherein the reflux drum is connected with a post-treatment device.
10. The benzyl chloride rectification column cleaning device as claimed in claim 1, wherein a manhole is arranged on the rectification column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120287172.7U CN214551277U (en) | 2021-02-01 | 2021-02-01 | Benzyl chloride rectifying column belt cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120287172.7U CN214551277U (en) | 2021-02-01 | 2021-02-01 | Benzyl chloride rectifying column belt cleaning device |
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| Publication Number | Publication Date |
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| CN214551277U true CN214551277U (en) | 2021-11-02 |
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| CN202120287172.7U Active CN214551277U (en) | 2021-02-01 | 2021-02-01 | Benzyl chloride rectifying column belt cleaning device |
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| CN (1) | CN214551277U (en) |
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2021
- 2021-02-01 CN CN202120287172.7U patent/CN214551277U/en active Active
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Effective date of registration: 20220601 Address after: 252211 new chemical materials Industrial Park, Liaocheng high tech Industrial Development Zone, Shandong Province Patentee after: CHLOR-ALKALI CHEMICAL BRANCH OF LUXI CHEMICAL GROUP Co.,Ltd. Address before: Liaocheng high tech Industrial Development Zone, Shandong 252000 Patentee before: Liaocheng Luxi Chlorobenzyl Chemical Co.,Ltd. |