CN213527481U - Toluene distillation recycling system - Google Patents
Toluene distillation recycling system Download PDFInfo
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- CN213527481U CN213527481U CN202022151004.3U CN202022151004U CN213527481U CN 213527481 U CN213527481 U CN 213527481U CN 202022151004 U CN202022151004 U CN 202022151004U CN 213527481 U CN213527481 U CN 213527481U
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Abstract
The utility model discloses a toluene distillation technical field's a toluene distillation recovery system of recycling, including stills, be equipped with heat exchanger A, heat exchanger B and heat exchanger C on the feed liquid pipeline that links to each other with stills in proper order, heat exchanger B's gaseous phase import links to each other with stills's gas vent, liquid phase export links to each other with the collection liquid case, heat exchanger C's liquid phase import links to each other with stills's leakage fluid dram, liquid phase export links to each other with heat exchanger A's liquid phase import, is equipped with horizontal flow distribution plate in the stills, is equipped with a plurality of flow distribution holes on the horizontal flow distribution. The utility model preheats the mixed liquid in steps through the high-temperature liquid and the high-temperature gas discharged from the distillation still, which can greatly reduce the temperature difference of the mixed liquid inside and outside the distillation still and further improve the distillation efficiency of the toluene; the utility model discloses a horizontal flow distribution plate will get into the mixed liquid in the stills and divide into the stranded trickle, and then has promoted the mixture of the interior mixed liquid of stills, the indirect improvement that has promoted toluene distillation efficiency.
Description
Technical Field
The utility model relates to a toluene distillation technical field, concretely relates to toluene distillation recovery system of recycling.
Background
Toluene is as a common solvent, need purify the recovery through the distillation after the use, and present toluene recovery unit mostly distills through the stills, but present stills distillation efficiency is lower, and the reason is mainly that: the temperature of the mixed liquid injected into the distillation kettle is far lower than that of the mixed liquid in the distillation kettle, the overall temperature in the distillation kettle can be reduced after the mixed liquid is injected, and the mixed liquid needs to be heated to the boiling point of toluene again, so that the distillation efficiency of the toluene is influenced; meanwhile, the mixed liquid just injected into the distillation still cannot be quickly mixed with the original mixed liquid in the distillation still, and the factor for limiting the distillation efficiency is also included.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a system for distilling, recycling and reusing toluene.
The utility model discloses the technical scheme who adopts does:
the utility model provides a toluene distillation recovery system of recycling, including stills and with the continuous liquid supply pipeline of stills's inlet follows the flow direction of liquid is equipped with heat exchanger A, heat exchanger B and heat exchanger C on the liquid supply pipeline in proper order in the liquid supply pipeline, heat exchanger B's gaseous phase import links to each other through gas transmission pipeline and stills's gas vent, and the liquid phase export links to each other through return line and collection liquid tank, heat exchanger C's liquid phase import links to each other through transfusion pipeline A and stills's leakage fluid dram, and the liquid phase export links to each other through transfusion pipeline B and heat exchanger A's liquid phase import, be equipped with the horizontal flow distribution plate in the stills, be equipped with a plurality of diffluence holes on the horizontal flow.
Preferably, the distillation still top is equipped with the steam chamber, be equipped with communicating pipe between steam chamber and the horizontal flow distribution plate, just communicating pipe downwardly extending runs through the horizontal flow distribution plate.
Preferably, a filter is arranged on the liquid supply pipeline.
Preferably, a heating sleeve is arranged on the outer side of the distillation kettle, and a heater is arranged in the distillation kettle.
Preferably, an adsorption layer is arranged in the liquid collecting tank.
Compared with the prior art, the utility model has the advantages that:
the utility model is provided with the heat exchanger A, the heat exchanger B and the heat exchanger C on the liquid supply pipeline connected with the distillation still, and the mixed liquid is preheated in steps by the high-temperature liquid and the high-temperature gas discharged by the distillation still, so that the temperature difference of the mixed liquid inside and outside the distillation still can be greatly reduced, and the distillation efficiency of the toluene is improved; the utility model discloses be equipped with horizontal flow distribution plate in stills, divide into the mixed liquid that gets into in the stills through horizontal flow distribution plate and stranded trickle and promoted the mixture of the interior mixed liquid of stills, the indirect distillation efficiency that has promoted toluene.
Drawings
Fig. 1 is a schematic structural view of the present invention;
1 is the stills, 2 is the liquid supply pipeline, 3 is the heating jacket, 4 is the heater, 5 is heat exchanger A, 6 is heat exchanger B, 7 is heat exchanger C, 8 is the filter, 9 is the gas transmission pipeline, 10 is return line, 11 is the header tank, 12 is the adsorbed layer, 13 is infusion pipeline A, 14 is infusion pipeline B, 15 is the collecting hopper, 16 is the horizontal flow distribution plate, 17 is the reposition of redundant personnel hole, 18 is the steam chamber, 19 is communicating pipe.
Detailed Description
The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way. The unit module components, structures, mechanisms, sensors and other devices referred to in the following examples are all conventional and commercially available products unless otherwise specified.
Example (b): as shown in fig. 1, a toluene distillation recycling system comprises a distillation still 1 and a liquid supply pipeline 2 connected with a liquid inlet of the distillation still 1, wherein a heating jacket 3 is arranged outside the distillation still 1, and a heater 4 is arranged in the distillation still 1; a heat exchanger A5, a heat exchanger B6, a heat exchanger C7 and a filter 8 are sequentially arranged on the liquid supply pipeline 2 along the flowing direction of liquid in the liquid supply pipeline 2, a gas-phase inlet of the heat exchanger B6 is connected with an exhaust port at the top of the distillation still 1 through a gas pipeline 9, a liquid-phase outlet of the heat exchanger B6 is connected with a liquid collecting tank 11 through a return pipeline 10, an adsorption layer 12 is arranged in the liquid collecting tank 11, and the bottom end of the return pipeline 10 extends downwards and penetrates through the adsorption layer 12; a liquid phase inlet of the heat exchanger C7 is connected with a liquid outlet at the bottom of the distillation still 1 through a liquid conveying pipeline A13, a liquid phase outlet of the heat exchanger C7 is connected with a liquid phase inlet of the heat exchanger A5 through a liquid conveying pipeline B14, and a liquid phase outlet of the heat exchanger A5 is connected with the liquid collecting hopper 15 through a pipeline; the distillation still 1 is internally provided with a horizontal flow distribution plate 16, the horizontal flow distribution plate 16 is positioned below the liquid inlet of the distillation still 1, the horizontal flow distribution plate 16 is provided with a plurality of flow distribution holes 17, the top of the distillation still 1 is provided with a steam chamber 18, a communicating pipe 19 is arranged between the steam chamber 18 and the horizontal flow distribution plate 16, and the communicating pipe 19 extends downwards and penetrates through the horizontal flow distribution plate 16.
It should be noted that: the temperature of the liquid discharged from the still pot 1 is higher than the temperature of the gas discharged.
The operation and use method of the benzene distillation recovery and reuse system is as follows:
the mixed liquid enters the heat exchanger A5 and then carries out first heat exchange with the liquid from the heat exchanger C7, so that the mixed liquid is preheated at low temperature, the mixed liquid enters the heat exchanger B6 and then carries out second heat exchange with the high-temperature gas discharged from the distillation still 1, so that the mixed liquid is preheated at medium temperature, the mixed liquid enters the heat exchanger C7 and then carries out third heat exchange with the high-temperature liquid discharged from the distillation still 1, so that the mixed liquid is preheated at high temperature, and through three-time stepped preheating, the temperature difference of the mixed liquid inside and outside the distillation still 1 is reduced to the maximum extent, and the distillation efficiency of toluene is greatly improved; meanwhile, the mixed liquid entering the distillation still 1 is divided into a plurality of strands of thin flows by the horizontal flow distribution plate 16, and then is mixed with the original mixed liquid in the distillation still 1, so that the mixed liquid is heated uniformly, and the distillation efficiency of the methylbenzene can be improved indirectly.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. The utility model provides a toluene distillation recovery system of recycling, including stills and with the confession liquid pipeline that stills's inlet links to each other, its characterized in that: follow the flow direction of liquid is equipped with heat exchanger A, heat exchanger B and heat exchanger C on the liquid supply pipeline in proper order in the liquid supply pipeline, heat exchanger B's gaseous phase import links to each other through gas transmission pipeline and stills's gas vent, and the liquid phase export links to each other through return line and collection liquid case, heat exchanger C's liquid phase import links to each other through infusion pipeline A and stills's leakage fluid dram, and the liquid phase export links to each other through infusion pipeline B and heat exchanger A's liquid phase import, be equipped with horizontal flow distribution plate in the stills, be equipped with a plurality of flow distribution holes on the horizontal flow distribution plate.
2. The toluene distillation recovery and reuse system according to claim 1, characterized in that: the distillation still top is equipped with the steam chamber, be equipped with communicating pipe between steam chamber and the horizontal flow distribution plate, just communicating pipe downwardly extending runs through the horizontal flow distribution plate.
3. The toluene distillation recovery and reuse system according to claim 1, characterized in that: and a filter is arranged on the liquid supply pipeline.
4. The toluene distillation recovery and reuse system according to claim 1, characterized in that: the outer side of the distillation kettle is provided with a heating sleeve, and a heater is arranged in the distillation kettle.
5. The toluene distillation recovery and reuse system according to claim 1, characterized in that: an adsorption layer is arranged in the liquid collecting box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022151004.3U CN213527481U (en) | 2020-09-27 | 2020-09-27 | Toluene distillation recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022151004.3U CN213527481U (en) | 2020-09-27 | 2020-09-27 | Toluene distillation recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213527481U true CN213527481U (en) | 2021-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022151004.3U Active CN213527481U (en) | 2020-09-27 | 2020-09-27 | Toluene distillation recycling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213527481U (en) |
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2020
- 2020-09-27 CN CN202022151004.3U patent/CN213527481U/en active Active
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