CN218795795U - Chloroacetic acid hydrogenation purification system - Google Patents
Chloroacetic acid hydrogenation purification system Download PDFInfo
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- CN218795795U CN218795795U CN202320141512.4U CN202320141512U CN218795795U CN 218795795 U CN218795795 U CN 218795795U CN 202320141512 U CN202320141512 U CN 202320141512U CN 218795795 U CN218795795 U CN 218795795U
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Abstract
The utility model belongs to chloroacetic acid hydrogenation purification equipment field, concretely relates to chloroacetic acid hydrogenation purification system, including preheating tank and hydrogenation ware, be provided with steam heating coil in the preheating tank, the gas output end and the liquid output end of preheating tank communicate with the hydrogenation ware respectively, the preheating tank be connected with hydrogen input tube, nitrogen gas input tube and chloroacetic acid stoste input tube, be provided with the gas diffusing pipe in the preheating tank, the gas diffusing pipe is cyclic annular setting in the preheating tank lower part, chloroacetic acid stoste input tube is higher than gas diffusing pipe place plane with the intercommunication position of preheating tank. The utility model discloses a preheating tank preheats the material for the material can the quick start reaction after getting into hydrogenation reactor, and with the help of hydrogen nitrogen gas input preheating tank, carry out pneumatic stirring to the chloroacetic acid stoste in the jar, improve and preheat the effect, practice thrift heat transfer time, also make the hydrogen temperature rise simultaneously, improve the hydrogen utilization ratio, reduce loss, reduction in production cost.
Description
Technical Field
The utility model belongs to chloroacetic acid hydrogenation purification equipment field, concretely relates to chloroacetic acid hydrogenation purification system.
Background
The hydrogen is not only used as an important industrial raw material in the chemical production process, but also used as a clean energy or a carrier of good energy in the energy field, has the characteristics of cleanness, high efficiency, energy storage, transportability and the like, is not primary energy, and needs to be converted and produced through the primary energy to be used as an energy carrier.
The hydrogen is produced mainly by fossil fuels such as coal, petroleum, natural gas and the like, and can also be obtained by electrolyzing salt water, but the method is a relatively expensive method, and the byproduct hydrogen produced in the chlor-alkali industry is relatively pure and widely applied.
The hydrogen flow rate in the chloroacetic acid hydrogenation process is mainly controlled in order to ensure that hydrogen participates in a reduction reaction to improve the purity of chloroacetic acid under the condition of excessive hydrogen in the chloroacetic acid production process, so that the byproduct dichloroacetic acid is subjected to removal of redundant chlorine atoms and is converted into chloroacetic acid. However, the cost is only increased by infinitely increasing the amount of hydrogen, so how to control the high reaction participation of hydrogen to reduce the emission of hydrogen and to smoothly complete the required reaction becomes a problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that exists among the above-mentioned prior art, the utility model provides a chloroacetic acid hydrogenation purification system can fully preheat the chloroacetic acid stoste and participate in the hydrogen of reaction to through flow valve control hydrogen admission capacity and hydrogenation reactor exhaust tail gas flow respectively, control reactor pressure improves the hydrogen utilization ratio, reduces the loss, the energy saving.
The utility model discloses a specific technical scheme be:
the utility model provides a chloroacetic acid hydrogenation purification system, includes preheating tank and hydrogenation ware, be provided with steam heating coil in the preheating tank, the gas output end and the liquid output end of preheating tank communicate with the hydrogenation ware respectively, the preheating tank be connected with hydrogen input tube, nitrogen gas input tube and chloroacetic acid stoste input tube, be provided with the gas diffusing pipe in the preheating tank, the gas diffusing pipe is cyclic annular setting in the preheating tank lower part, be provided with the gas dispersing hole on the gas diffusing pipe, hydrogen input tube and nitrogen gas input tube communicate with the gas diffusing pipe respectively, chloroacetic acid stoste input tube is higher than gas diffusing pipe place plane with the intercommunication position of preheating tank.
The hydrogen input pipe is provided with a flow valve and a flow pump, and the flow pump is arranged on the output side of the flow valve.
And the chloroacetic acid stock solution input pipe is provided with a flow valve and a flow pump, and the flow pump is arranged on the output side of the flow valve.
The hydrogenation reactor is provided with hydrogenation tail gas output tube, be connected with the flow valve on the hydrogenation tail gas output tube, the hydrogenation reactor still is connected with the manometer.
The liquid output end of the lower part of the preheating tank is provided with a static air pipe, the static air pipe is of a vertically arranged tubular structure, the upper end of the static air pipe is connected with the liquid output end of the lower part of the preheating tank, and the lower end of the static air pipe is formed into the liquid output end of the preheating tank.
The hydrogen input pipe and the nitrogen input pipe are communicated with the air diffusion pipe through a mixing pipe, the mixing pipe is of a three-way pipe structure, the hydrogen input pipe and the air diffusion pipe are communicated at the straight line side of the mixing pipe, and the nitrogen input pipe is connected to the branch line side of the three-way pipe structure of the mixing pipe.
The liquid output end of the preheating tank is provided with a thermometer, and the input end of the steam heating coil of the preheating tank is provided with a flow valve.
The utility model has the advantages that:
the utility model discloses a preheating tank preheats the material for the material can the quick start reaction after getting into hydrogenation ware, and with the help of hydrogen nitrogen gas input preheating tank, carry out pneumatic stirring to the chloroacetic acid stoste in the jar, improve and preheat the effect, practice thrift heat transfer time, also make the hydrogen temperature rise simultaneously, improve the hydrogen utilization ratio, reduce loss, reduction in production cost.
Drawings
FIG. 1 is a schematic view of the present invention;
in the attached figure, 1, a preheating tank, 2, a hydrogenation reactor, 3, a gas dispersing pipe, 4, a static gas pipe, 5 and a mixing pipe.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and specific embodiments:
concrete embodiment is shown in fig. 1, the utility model relates to a chloroacetic acid hydrogenation purification system, including preheating tank 1 and hydrogenation reactor 2, be provided with steam heating coil in the preheating tank 1, the gas output end and the liquid output end of preheating tank 1 communicate with hydrogenation reactor 2 respectively, preheating tank 1 be connected with hydrogen input tube, nitrogen gas input tube and chloroacetic acid stoste input tube, be provided with air diffusing pipe 3 in the preheating tank 1, air diffusing pipe 3 is cyclic annular setting in preheating tank 1 lower part, be provided with the gas dispersing hole on air diffusing pipe 3, hydrogen input tube and nitrogen gas input tube respectively with air diffusing pipe 3 intercommunication, chloroacetic acid stoste input tube is higher than air diffusing pipe 3 place plane with the intercommunication position of preheating tank 1.
The chloroacetic acid stock solution input pipe for feeding the solution is arranged above the gas diffusion pipe 3, so that gas-liquid reverse leaching is realized, the solution is stirred by gas and is fully contacted with the steam heating coil, and the heat exchange efficiency is improved.
The utility model aims at controlling the hydrogen flow rate participating in the reaction in the chloroacetic acid hydrogenation process, improving the hydrogen utilization rate, solving the problem of excessive hydrogen under the condition of meeting the generation of reactants, and the saved hydrogen amount can be used for other production directions.
Dichloroacetic acid contained in chloroacetic acid tail liquid is purified through a catalytic hydrogenation process, wherein the catalytic hydrogenation process is a process for performing catalytic refining on materials in the presence of hydrogen for improving the product quality and the product use performance, and mainly comprises hydrofining. High-purity H2 (> 99.9%) produced by chlor-alkali is used as a raw material, and qualified hydrogen is provided for a hydrogenation process.
The hydrogenation reactor 2 is heated to 90-180 ℃ by high-pressure steam, and then chloroacetic acid containing high-concentration dichloroacetic acid, hydrogen and nitrogen which are preheated to 130-150 ℃ in the preheating tank 1 are continuously added into the hydrogenation reactor 2 for reaction.
Wherein, the hydrogenation reactor is a device for carrying out hydrogenation reaction on materials and a catalyst in the reactor on a fixed bed. The method is characterized by mature technology, simple process and equipment and wide application, and liquid-phase hydrogenation is carried out in the hydrogenation reactor.
Further, as shown in fig. 1, a flow valve and a flow pump are provided on the hydrogen input pipe, and the flow pump is provided on the output side of the flow valve.
And the chloroacetic acid stock solution input pipe is provided with a flow valve and a flow pump, and the flow pump is arranged on the output side of the flow valve.
The combination of a flow valve and a flow pump is respectively arranged on a hydrogen input pipe and a chloroacetic acid stock solution input pipe, the flow is adjusted by controlling the frequency conversion of the pump and the opening degree of the valve, and the mass of the material can be calculated by the volume flow of the material under the condition of certain material density, so that the stable control of the material flow is achieved.
Further, hydrogenation reactor 2 is provided with hydrogenation tail gas output tube, be connected with the flow valve on the hydrogenation tail gas output tube, hydrogenation reactor 2 still is connected with the manometer.
Acquire hydrogenation reactor 2 internal gas pressure through the manometer, through the aperture of the flow valve of connecting on the pressure numerical control of manometer pressure on the hydrogenation tail gas output tube, guarantee the pressure stability in the hydrogenation reactor 2.
The liquid output end of the lower part of the preheating tank 1 is provided with a static air pipe 4, the static air pipe 4 is of a vertically arranged tubular structure, the upper end of the static air pipe 4 is connected with the liquid output end of the lower part of the preheating tank 1, and the lower end of the static air pipe 4 is formed into the liquid output end of the preheating tank 1.
The longer static gas pipe 4 is arranged to separate gas from liquid, so that a flow pump connected with the static gas pipe 4 can stably convey reaction liquid to the hydrogenation reactor 2.
The hydrogen input pipe and the nitrogen input pipe are communicated with the air diffusion pipe 3 through the mixing pipe 5, the mixing pipe 5 is of a three-way pipe structure, the hydrogen input pipe and the air diffusion pipe 3 are communicated on the straight line side of the mixing pipe 5, and the nitrogen input pipe is connected to the branch line side of the three-way pipe structure of the mixing pipe 5.
Through at straight line side input hydrogen, reduce the input air lock, avoid influencing the hydrogen input volume, through branch line side input nitrogen gas for nitrogen gas mixes with hydrogen under the inertia effect, and the mist is imported into preheating tank 1 jointly and is participated in preheating, improves the mixing uniformity degree.
Furthermore, a thermometer is arranged at the liquid output end of the preheating tank 1, and a flow valve is arranged at the input end of the steam heating coil of the preheating tank 1. Acquire the temperature of liquid output end through the thermometer, through the flow valve linkage of thermometer and steam heating coil input, when output temperature is less than preheating and accomplishes the temperature, through increase flow valve aperture, play the effect that raises the temperature, guarantee going on smoothly of reaction.
The nitrogen gas in the hydrogenation reaction process has the function of removing reaction heat in time in the reaction process, and the temperature runaway phenomenon in the hydrogenation process is avoided. The air in the system is mainly replaced in the process of starting and stopping, so that the aim of safe production is fulfilled. Utilize the utility model discloses an equipment has reduced the emission of hydrogen in process of production, can be used for other fields with hydrogen, plays energy saving's effect in the use of hydrogen. The utility model provides a purification system can serialization production, and degree of automation is high, convenient operation, and reaction rate and product quality are good, have novelty and practicality.
Claims (7)
1. The utility model provides a chloroacetic acid hydrogenation purification system, includes preheating tank (1) and hydrogenation ware (2), be provided with steam heating coil in preheating tank (1), the gas output end and the liquid output end of preheating tank (1) communicate with hydrogenation ware (2) respectively, preheating tank (1) be connected with hydrogen input tube, nitrogen gas input tube and chloroacetic acid stoste input tube, its characterized in that: the device is characterized in that a gas diffusion pipe (3) is arranged in the preheating tank (1), the gas diffusion pipe (3) is annularly arranged at the lower part of the preheating tank (1), gas diffusion holes are formed in the gas diffusion pipe (3), the hydrogen input pipe and the nitrogen input pipe are respectively communicated with the gas diffusion pipe (3), and the communication position of the chloroacetic acid stock solution input pipe and the preheating tank (1) is higher than the plane where the gas diffusion pipe (3) is located.
2. The chloroacetic acid hydrogenation purification system of claim 1, wherein: the hydrogen input pipe is provided with a flow valve and a flow pump, and the flow pump is arranged on the output side of the flow valve.
3. The chloroacetic acid hydrogenation purification system of claim 1, wherein: and the chloroacetic acid stock solution input pipe is provided with a flow valve and a flow pump, and the flow pump is arranged on the output side of the flow valve.
4. The chloroacetic acid hydrogenation purification system of claim 1, wherein: hydrogenation reactor (2) are provided with hydrogenation tail gas output tube, be connected with the flow valve on the hydrogenation tail gas output tube, hydrogenation reactor (2) still are connected with the manometer.
5. The chloroacetic acid hydrogenation purification system of claim 1, wherein: the liquid output end of the lower part of the preheating tank (1) is provided with a static air pipe (4), the static air pipe (4) is of a vertically arranged tubular structure, the upper end of the static air pipe (4) is connected with the liquid output end of the lower part of the preheating tank (1), and the lower end of the static air pipe (4) is formed into the liquid output end of the preheating tank (1).
6. The chloroacetic acid hydrogenation purification system of claim 1, wherein: the hydrogen input pipe and the nitrogen input pipe are communicated with the air diffusing pipe (3) by means of a mixing pipe (5), the mixing pipe (5) is of a three-way pipe structure, the hydrogen input pipe and the air diffusing pipe (3) are communicated on the straight line side of the mixing pipe (5), and the nitrogen input pipe is connected on the branch line side of the three-way pipe structure of the mixing pipe (5).
7. The chloroacetic acid hydrogenation purification system of claim 1, wherein: the liquid output end of the preheating tank (1) is provided with a thermometer, and the input end of the steam heating coil of the preheating tank (1) is provided with a flow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320141512.4U CN218795795U (en) | 2023-02-02 | 2023-02-02 | Chloroacetic acid hydrogenation purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320141512.4U CN218795795U (en) | 2023-02-02 | 2023-02-02 | Chloroacetic acid hydrogenation purification system |
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| Publication Number | Publication Date |
|---|---|
| CN218795795U true CN218795795U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320141512.4U Active CN218795795U (en) | 2023-02-02 | 2023-02-02 | Chloroacetic acid hydrogenation purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218795795U (en) |
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2023
- 2023-02-02 CN CN202320141512.4U patent/CN218795795U/en active Active
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