CN209957673U - Chloro addition system for 1,1, 2-trichloroethane production - Google Patents
Chloro addition system for 1,1, 2-trichloroethane production Download PDFInfo
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- CN209957673U CN209957673U CN201822243842.6U CN201822243842U CN209957673U CN 209957673 U CN209957673 U CN 209957673U CN 201822243842 U CN201822243842 U CN 201822243842U CN 209957673 U CN209957673 U CN 209957673U
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Abstract
The utility model relates to a chloro addition system for 1,1, 2-trichloroethane production, chloro addition system includes chloroethylene gasification system, chlorine gasification system and chlorination system, and chloroethylene gasification system includes chloroethylene elevated tank A, chloroethylene elevated tank B, chloroethylene evaporimeter, chloroethylene buffer tank A and chloroethylene buffer tank B; the chlorine gasification system comprises a chlorine steel cylinder, a chlorine brine vaporization tank, a chlorine buffer tank A, a chlorine buffer tank B and a chlorine emergency alkali pool; the chlorination system comprises a chlorination tower, an oxidation condenser A, an oxidation condenser B, an oxidation condenser C, a chlorination liquid storage tank A, a chlorination liquid storage tank B and a tail gas buffer tank. The utility model has the advantages that: the utility model discloses only need use chlorination tower and chlorination condenser's combination among the chlorination system, can accomplish the reaction, these device structures are simple relatively, are conventional service equipment, and occupation space size, and then can reduction in production cost.
Description
Technical Field
The utility model belongs to the technical field of chemical production device, in particular to a chloro addition system for 1,1, 2-trichloroethane production.
Background
1,1, 2-trichloroethane is an important chemical raw material and can be used for preparing chemical products such as vinylidene chloride and the like. 1,1, 2-trichloroethane is generally a chlorination product of vinyl chloride and chlorine as raw materials. The reaction equation is:
。
many documents and patents disclose the preparation of 1,1, 2-trichloroethane, for example patent CN 100335450C discloses a method for preparing 1,1, 2-trichloroethane, comprising the following steps: 1,1, 2-trichloroethane is taken as a circulating medium and is sent into a first mixing and spraying device, vinyl chloride is pumped into a mixing area of the first mixing and spraying device through a vinyl chloride inlet of the first mixing and spraying device, then the chloroethylene dissolved in the 1,1, 2-trichloroethane is sent into a second mixing and spraying device, chlorine is pumped into a mixing area of the second mixing and spraying device through a chlorine inlet of the second mixing and spraying device, in the mixing zone of the second mixing and spraying device, chloroethylene and chlorine gas are mixed and pre-reacted, then the mixture is fed into main pipeline reactor equipped with static mixing component to make continuous reaction to produce 1,1, 2-trichloroethane, the reacted product, the chloroethylene is separated by a gas-liquid separator and enters a subsequent working section, the conversion rate of the chloroethylene can reach more than 98 percent, the selectivity can reach more than 96 percent, and the industrial popularization and use are facilitated; however, this production method has certain disadvantages: the chlorination reaction process needs to use a mixing and spraying device and a main pipeline reactor provided with a static mixing component, and the devices have relatively complex structures and large occupied space, thereby increasing the production cost.
Therefore, it is necessary to develop a chloro-addition system for 1,1, 2-trichloroethane production which can reduce the production cost.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a chlorinated addition system that is used for 1,1, 2-trichloroethane production that can reduction in production cost.
In order to solve the technical problem, the utility model adopts the technical scheme that: the chloro-addition system for 1,1, 2-trichloroethane production is characterized in that: the chloro-addition system comprises a chloroethylene gasification system, a chlorine gasification system and a chlorination system,
the chloroethylene gasification system comprises a chloroethylene elevated tank A, a chloroethylene elevated tank B, a chloroethylene evaporator, a chloroethylene buffer tank A and a chloroethylene buffer tank B; a chloroethylene feeding main pipe is arranged above the chloroethylene elevated tank A and the chloroethylene elevated tank B, a chloroethylene feeding pipe A and a chloroethylene feeding pipe B are further arranged on the chloroethylene feeding main pipe in a communicating mode, the other end of the chloroethylene feeding pipe A is arranged in a communicating mode with the chloroethylene elevated tank A, and the other end of the chloroethylene feeding pipe B is arranged in a communicating mode with the chloroethylene elevated tank B; the bottom ends of the chloroethylene elevated tank A and the chloroethylene elevated tank B are communicated through a pipeline A, and the pipeline A is communicated with the bottom side end of the chloroethylene evaporator through a pipeline B; the upper end of the chloroethylene evaporator is communicated with the upper end of the chloroethylene elevated tank B through a pipeline C, and the pipeline C is communicated with the upper end of the chloroethylene buffer tank A through a pipeline D; the upper end of the chloroethylene buffer tank B is also provided with a chloroethylene discharge pipe B communicated with a chlorination tower in a chlorination system, and the upper end of the chloroethylene buffer tank A is communicated with the chloroethylene discharge pipe B through the chloroethylene discharge pipe A;
the chlorine gasification system comprises a chlorine steel cylinder, a chlorine brine vaporization tank, a chlorine buffer tank A, a chlorine buffer tank B and a chlorine emergency alkali pool; the chlorine steel cylinder is communicated with the chlorine brine vaporization tank through a chlorine feeding pipe A, the chlorine brine vaporization tank is communicated with the chlorine buffer tank A through a chlorine feeding pipe B, the upper end of the chlorine buffer tank A is communicated with the upper end of the chlorine buffer tank B through a chlorine feeding pipe C, the chlorine buffer tank B is communicated with the chlorine emergency alkali tank through a pipeline E, the bottom end of the chlorine buffer tank A is communicated with the pipeline E through a pipeline F, and the upper end of the chlorine buffer tank A and the upper end of the chlorine buffer tank B are respectively communicated with the pipeline F through a drain pipe A and a drain pipe B; the upper end of the chlorine gas buffer tank B is also provided with a chlorine alkene discharging pipe communicated with a chlorination tower in a chlorination system;
the chlorination system comprises a chlorination tower, an oxidation condenser A, an oxidation condenser B, an oxidation condenser C, a chlorination liquid storage tank A, a chlorination liquid storage tank B and a tail gas buffer tank; the bottom end of the chlorination tower is communicated with the top end of a chlorination condenser C through a pipeline G, the pipeline G is further communicated with an oxidation condenser A and an oxidation condenser B through a pipeline H and a pipeline I respectively, the side end of the upper portion of the chlorination tower is communicated with the bottom end of the chlorination condenser C through a pipeline J, the pipeline J is further communicated with the oxidation condenser A and the oxidation condenser B through a pipeline K and a pipeline L respectively, and a chlorination circulating pump is further arranged on the pipeline J in series; the top end of the chlorination tower is communicated with a chlorination liquid storage tank B through a pipeline M, and the pipeline M is communicated with a chlorination liquid storage tank A through a pipeline N; the top end of the chlorination liquid storage tank A is communicated with the tail gas buffer tank through a pipeline O, and the top end of the chlorination liquid storage tank B is communicated with the pipeline N through a pipeline P.
Further, through salt solution cooling water piping intercommunication between the bottom and the upper end of chlorine salt solution vaporization pond, and still establish ties on the salt solution cooling water piping near the bottom of chlorine salt solution vaporization pond and be provided with the salt solution circulating pump.
The utility model has the advantages that:
(1) the utility model is used for the chloro addition system of 1,1, 2-trichloroethane production, this chloro addition system comprises chloroethylene gasification system, chlorine gasification system and chlorination system, wherein, chloroethylene gasification system and chlorine gasification system all adopt two buffering conveying systems, can improve raw materials supply efficiency greatly, and then can improve chlorination addition efficiency greatly; meanwhile, the chlorination system can complete the reaction only by combining the chlorination tower and the chlorination condenser, and the devices have relatively simple structures, are conventional devices, occupy space and further reduce production cost;
(2) the utility model is used for the chloro addition system of 1,1, 2-trichloroethane production, through salt solution cooling water piping intercommunication between the bottom of chlorine salt solution vaporization pond and upper end, and still establish ties on the salt solution cooling water piping of the bottom that is close to chlorine salt solution vaporization pond and be provided with the salt solution circulating pump, and then can effectively control the gasification temperature of chlorine salt solution vaporization pond and keep about 20 ℃, satisfy production technology condition needs.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of a chloroethylene gasification system and a chlorine gasification system in a chloro-addition system for producing 1,1, 2-trichloroethane.
FIG. 2 is a schematic structural diagram of a chlorination system in a chloro-addition system for producing 1,1, 2-trichloroethane according to the present invention.
Detailed Description
The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the scope of the present invention.
Examples
This example is for the chloro-addition system for 1,1, 2-trichloroethane production, which includes a vinyl chloride gasification system, a chlorine gasification system, and a chlorination system.
A vinyl chloride gasification system, as shown in fig. 1, comprising a vinyl chloride head tank 1A, a vinyl chloride head tank 1B, a vinyl chloride evaporator 2, a vinyl chloride buffer tank 3A and a vinyl chloride buffer tank 3B; a chloroethylene feeding main pipe is arranged above the chloroethylene elevated tank 1A and the chloroethylene elevated tank 1B, a chloroethylene feeding pipe A and a chloroethylene feeding pipe B are also arranged on the chloroethylene feeding main pipe in a communicating manner, the other end of the chloroethylene feeding pipe A is arranged in a communicating manner with the chloroethylene elevated tank 1A, and the other end of the chloroethylene feeding pipe B is arranged in a communicating manner with the chloroethylene elevated tank 1B; the bottom ends of the chloroethylene elevated tank 1A and the chloroethylene elevated tank 1B are communicated through a pipeline A, and the pipeline A is communicated with the side end of the bottom part of the chloroethylene evaporator 2 through a pipeline B; the upper end of the chloroethylene evaporator 2 is communicated with the upper end of the chloroethylene elevated tank 1B through a pipeline C, and the pipeline C is communicated with the upper end of the chloroethylene buffer tank 3A through a pipeline D; the upper end of the chloroethylene buffer tank 3B is also provided with a chloroethylene discharge pipe B communicated with a chlorination tower 8 in a chlorination system, and the upper end of the chloroethylene buffer tank 3A is communicated with the chloroethylene discharge pipe 3B through a chloroethylene discharge pipe A.
A chlorine gasification system, as shown in fig. 1, comprising a chlorine steel cylinder 4, a chlorine brine vaporization tank 5, a chlorine buffer tank 6A, a chlorine buffer tank 6B and a chlorine emergency alkali tank 7; the chlorine steel cylinder 4 is communicated with the chlorine brine vaporization tank 5 through a chlorine feeding pipe A, the chlorine brine vaporization tank 5 is communicated with the chlorine buffer tank 6A through a chlorine feeding pipe B, the upper end of the chlorine buffer tank 6A is communicated with the upper end of the chlorine buffer tank 6B through a chlorine feeding pipe C, the chlorine buffer tank 6B is communicated with the chlorine emergency alkali pool 7 through a pipeline E, the bottom end of the chlorine buffer tank 6A is communicated with the pipeline E through a pipeline F, and the upper end of the chlorine buffer tank 6A and the upper end of the chlorine buffer tank 6B are respectively communicated with the pipeline F through a drain pipe A and a drain pipe B; the upper end of the chlorine buffer tank 6B is also provided with a chlorine alkene discharging pipe communicated with a chlorination tower 8 in a chlorination system; the bottom end and the upper end of the chlorine brine vaporization pool 5 are communicated through a brine cooling water pipeline, and a brine circulating pump 12 is further arranged on the brine cooling water pipeline close to the bottom end of the chlorine brine vaporization pool 5 in series, so that the gasification temperature of the chlorine brine vaporization pool 5 can be effectively controlled to be kept at about 20 ℃, and the requirements of production process conditions are met.
The chlorination system comprises a chlorination tower 8, an oxidation condenser 9A, an oxidation condenser 9B, an oxidation condenser 9C, a chlorinated liquid storage tank 10A, a chlorinated liquid storage tank 10B and a tail gas buffer tank 11 as shown in FIG. 2; the bottom end of the chlorination tower 8 is communicated with the top end of a chlorination condenser 9C through a pipeline G, the pipeline G is further communicated with an oxidation condenser 9A and an oxidation condenser 9B through a pipeline H and a pipeline I respectively, the side end of the upper portion of the chlorination tower 8 is communicated with the bottom end of the chlorination condenser 9C through a pipeline J, the pipeline J is further communicated with the oxidation condenser 9A and the oxidation condenser 9B through a pipeline K and a pipeline L respectively, and a chlorination circulating pump 13 is further arranged on the pipeline J in series; the top end of the chlorination tower 8 is communicated with the chlorination liquid storage tank 10B through a pipeline M, and the pipeline M is communicated with the chlorination liquid storage tank 10A through a pipeline N; the top end of the chlorination liquid storage tank 10A is communicated with the tail gas buffer tank 11 through a pipeline O, and the top end of the chlorination liquid storage tank 10B is communicated with a pipeline N through a pipeline P.
The utility model discloses a chloro addition system's for 1,1, 2-trichloroethane production working process as follows:
(1) pumping the materials in the chloroethylene tank into a chloroethylene elevated tank 1A and a chloroethylene elevated tank 1B through a shield pump, controlling the materials by using a regulating valve A, allowing the materials to enter a chloroethylene evaporator 2 by utilizing liquid level difference, gasifying the materials, and then conveying the gasified materials to a chlorination tower 8 in a chlorination system through a chloroethylene buffer tank 3B;
(2) chlorine enters a chlorine brine vaporization tank 5 through a chlorine steel cylinder 4 under the control of a regulating valve B, and is delivered to a chlorination tower 8 in a chlorination system through a chlorine buffer tank 6B after being gasified;
(3) the chloroethylene and chlorine gas entering a chlorination tower 8 are mixed according to a certain proportion, addition reaction is carried out under the action of an iron ring as a catalyst, the reaction temperature is controlled to be 40-45 ℃, reaction heat is forced to circulate by a chlorination circulating pump 13, circulating water of a chlorination condenser is used for carrying away, part of generated 1,1, 2-trichloroethane participates in mother liquor circulation, and the other part of generated 1,1, 2-trichloroethane overflows to a chlorination liquor storage tank 10A and a chlorination liquor storage tank 10B through an overflow port at the upper part of the chlorination tower 8.
The basic principles and main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A chloro-addition system for the production of 1,1, 2-trichloroethane, characterized by: the chloro-addition system comprises a chloroethylene gasification system, a chlorine gasification system and a chlorination system,
the chloroethylene gasification system comprises a chloroethylene elevated tank A, a chloroethylene elevated tank B, a chloroethylene evaporator, a chloroethylene buffer tank A and a chloroethylene buffer tank B; a chloroethylene feeding main pipe is arranged above the chloroethylene elevated tank A and the chloroethylene elevated tank B, a chloroethylene feeding pipe A and a chloroethylene feeding pipe B are further arranged on the chloroethylene feeding main pipe in a communicating mode, the other end of the chloroethylene feeding pipe A is arranged in a communicating mode with the chloroethylene elevated tank A, and the other end of the chloroethylene feeding pipe B is arranged in a communicating mode with the chloroethylene elevated tank B; the bottom ends of the chloroethylene elevated tank A and the chloroethylene elevated tank B are communicated through a pipeline A, and the pipeline A is communicated with the bottom side end of the chloroethylene evaporator through a pipeline B; the upper end of the chloroethylene evaporator is communicated with the upper end of the chloroethylene elevated tank B through a pipeline C, and the pipeline C is communicated with the upper end of the chloroethylene buffer tank A through a pipeline D; the upper end of the chloroethylene buffer tank B is also provided with a chloroethylene discharge pipe B communicated with a chlorination tower in a chlorination system, and the upper end of the chloroethylene buffer tank A is communicated with the chloroethylene discharge pipe B through the chloroethylene discharge pipe A;
the chlorine gasification system comprises a chlorine steel cylinder, a chlorine brine vaporization tank, a chlorine buffer tank A, a chlorine buffer tank B and a chlorine emergency alkali pool; the chlorine steel cylinder is communicated with the chlorine brine vaporization tank through a chlorine feeding pipe A, the chlorine brine vaporization tank is communicated with the chlorine buffer tank A through a chlorine feeding pipe B, the upper end of the chlorine buffer tank A is communicated with the upper end of the chlorine buffer tank B through a chlorine feeding pipe C, the chlorine buffer tank B is communicated with the chlorine emergency alkali tank through a pipeline E, the bottom end of the chlorine buffer tank A is communicated with the pipeline E through a pipeline F, and the upper end of the chlorine buffer tank A and the upper end of the chlorine buffer tank B are respectively communicated with the pipeline F through a drain pipe A and a drain pipe B; the upper end of the chlorine gas buffer tank B is also provided with a chlorine alkene discharging pipe communicated with a chlorination tower in a chlorination system;
the chlorination system comprises a chlorination tower, an oxidation condenser A, an oxidation condenser B, an oxidation condenser C, a chlorination liquid storage tank A, a chlorination liquid storage tank B and a tail gas buffer tank; the bottom end of the chlorination tower is communicated with the top end of a chlorination condenser C through a pipeline G, the pipeline G is further communicated with an oxidation condenser A and an oxidation condenser B through a pipeline H and a pipeline I respectively, the side end of the upper portion of the chlorination tower is communicated with the bottom end of the chlorination condenser C through a pipeline J, the pipeline J is further communicated with the oxidation condenser A and the oxidation condenser B through a pipeline K and a pipeline L respectively, and a chlorination circulating pump is further arranged on the pipeline J in series; the top end of the chlorination tower is communicated with a chlorination liquid storage tank B through a pipeline M, and the pipeline M is communicated with a chlorination liquid storage tank A through a pipeline N; the top end of the chlorination liquid storage tank A is communicated with the tail gas buffer tank through a pipeline O, and the top end of the chlorination liquid storage tank B is communicated with the pipeline O through a pipeline P.
2. The chloro-addition system for the production of 1,1, 2-trichloroethane as claimed in claim 1, wherein: the bottom end and the upper end of the chlorine brine vaporization tank are communicated through a brine cooling water pipeline, and a brine circulating pump is further arranged on the brine cooling water pipeline close to the bottom end of the chlorine brine vaporization tank in series.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822243842.6U CN209957673U (en) | 2018-12-29 | 2018-12-29 | Chloro addition system for 1,1, 2-trichloroethane production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822243842.6U CN209957673U (en) | 2018-12-29 | 2018-12-29 | Chloro addition system for 1,1, 2-trichloroethane production |
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| CN209957673U true CN209957673U (en) | 2020-01-17 |
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| CN201822243842.6U Active CN209957673U (en) | 2018-12-29 | 2018-12-29 | Chloro addition system for 1,1, 2-trichloroethane production |
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