CN214105865U - Heat pump rectifying device adopting working medium compression - Google Patents
Heat pump rectifying device adopting working medium compression Download PDFInfo
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- CN214105865U CN214105865U CN202021785054.0U CN202021785054U CN214105865U CN 214105865 U CN214105865 U CN 214105865U CN 202021785054 U CN202021785054 U CN 202021785054U CN 214105865 U CN214105865 U CN 214105865U
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Abstract
The utility model discloses a heat pump rectifying device adopting working medium compression, which comprises a rectifying tower, wherein a solvent steam outlet at the top of the rectifying tower is led into a first condenser through a pipeline and exchanges heat with a liquid-phase working medium in the first condenser; the solvent vapor in the first condenser flows back to the rectifying tower through a pipeline after being in a liquid phase; the liquid-phase working medium of the first condenser is evaporated into working medium steam, and the working medium steam is connected with the compressor through a pipeline; the compressor pressurizes the working medium steam to make the boiling temperature of the working medium steam higher than the tower bottom temperature of the rectifying tower; the outlet of the compressor is connected with a first reboiler at the bottom of the rectifying tower through a pipeline, and the working medium steam is condensed into a liquid phase in the first reboiler and flows back into the first condenser through the pipeline. By utilizing the solvent steam, the rectification working conditions of the tower top temperature and the tower bottom temperature can be adjusted without considering the operating pressure of the rectification tower, and the solvent steam is not directly compressed, thereby ensuring the intrinsic safety of the process production.
Description
Technical Field
The utility model relates to a heat pump rectification technical field especially relates to an adopt heat pump rectifier unit of working medium compression.
Background
Solvent rectification is widely applied to the industries of chemical industry, medicine, food and the like, and the energy consumption cost of the solvent rectification accounts for a large proportion of all production costs. Therefore, the energy saving technology of the rectification system is always a research focus, wherein the heat pump rectification is the most advantageous energy saving technology.
The heat pump rectification technology is provided abroad in the 50 th of the 20 th century, and forms various flows through years of research, and domestic research is synchronously carried out. However, the heat pump rectification technology has certain limitations, firstly, in actual working conditions, the temperature difference between the top temperature and the bottom temperature is often large, which puts high requirements on a compressor, secondly, for the condition of pressure reduction rectification, because the gas quantity is very large, the efficiency of the compressor is reduced, the power consumption is relatively high, and thirdly, the problem of potential safety hazard cannot be solved essentially by directly compressing solvent vapor by the compressor, so that the successful industrial application is still not enough at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an adopt heat pump rectifier unit of working medium compression, overcome a technical problem in the background art at least.
In order to achieve the above purpose, the utility model discloses a technical scheme is: a heat pump rectifying device adopting working medium compression comprises a rectifying tower, wherein a solvent steam outlet at the top of the rectifying tower is led into a first condenser through a pipeline and exchanges heat with a liquid-phase working medium in the first condenser; the solvent vapor in the first condenser flows back to the rectifying tower through a pipeline after being in a liquid phase; the liquid-phase working medium of the first condenser is evaporated into working medium steam, and the working medium steam is connected with the compressor through a pipeline; the compressor pressurizes the working medium steam to make the boiling temperature of the working medium steam higher than the tower bottom temperature of the rectifying tower; the outlet of the compressor is connected with a first reboiler at the bottom of the rectifying tower through a pipeline, working medium steam is condensed into a liquid phase in the first reboiler and flows back into the first condenser through the pipeline, a solvent steam outlet at the top of the rectifying tower is connected with an inlet of a gas-liquid separator through a first pipeline, mist in the solvent steam is removed by the gas-liquid separator, and the solvent steam is guided into the first condenser through a second pipeline.
Further, the first condenser is provided with a first interface for solvent vapor reflux, and the first interface is connected with the upper end of the rectifying tower through a third pipeline.
Furthermore, the first condenser is provided with a second interface for the escape of evaporated working medium steam, and the second interface is connected with the inlet of the compressor through a fourth pipeline.
Further, the bottom of the rectifying tower is connected with the inlet of the stripping tower through a seventh pipeline, and the steam outlet of the stripping tower flows back into the rectifying tower through a pipeline.
Further, the bottom of the stripping column is connected to a second reboiler.
Further, the stripping tower is connected with a second condenser through an eighth pipeline, and the second condenser reflows into the rectifying tower through a ninth pipeline.
And the liquid phase at the bottom of the rectifying tower enters a stripping tower, steam at the top of the stripping tower enters a second condenser, the steam is condensed into a liquid phase and then enters the rectifying tower, and the liquid phase at the bottom of the stripping tower reaches the index and then is discharged. Through the use of the stripping tower, the liquid phase at the bottom of the rectifying tower can be used for multiple times.
Compared with the prior art, the utility model discloses a heat pump rectification method of working medium compression utilizes the solvent steam (the secondary steam) at the top of the tower to exchange in first condenser, heats and makes the working medium evaporation be working medium steam to the liquid working medium of first condenser, and the condensation of the solvent steam is the liquid phase backward flow simultaneously, and working medium steam heats and makes the evaporation of liquid phase at the bottom of the tower through first reboiler after the compressor compression, and the condensation of working medium steam is working medium liquid phase simultaneously, circulates back to first condenser. By utilizing the solvent steam, the rectification working conditions of the tower top temperature and the tower bottom temperature can be adjusted without considering the operating pressure of the rectification tower, and the solvent steam is not directly compressed, so that the intrinsic safety of the process production is ensured, and the application space of the energy-saving technology is expanded to a great extent.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure:
1-a rectifying tower; 2-a gas-liquid separator; 3-a first condenser; 4-a compressor; 5-a first reboiler; 6-a second reboiler; 7-a stripping column; 8-second condenser.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Example 1
Referring to the attached drawings 1 and 2, the heat pump rectifying device adopting working medium compression in the embodiment includes a rectifying tower 1, and a solvent vapor outlet at the top of the rectifying tower 1 is led into a first condenser 3 (a tower top condenser) through a pipeline and exchanges heat with a liquid-phase working medium in the first condenser 3. After heat exchange, the solvent vapor in the first condenser 3 flows back to the rectifying tower 1 through a pipeline after liquid phase, and the liquid phase working medium in the first condenser 3 is evaporated into working medium vapor and is guided into the compressor 4 through a pipeline. The compressor 4 can pressurize the working medium steam to make the boiling temperature higher than the tower bottom temperature of the rectifying tower 1, the compressed working medium steam is heated by the first reboiler 5 and makes the tower bottom liquid phase evaporate, meanwhile, the working medium steam is condensed into the working medium liquid phase and circulates back to the first condenser 3. Discharging after the liquid phase at the bottom of the rectifying tower 1 reaches the index, connecting a solvent steam outlet at the top of the rectifying tower 1 with an inlet of a gas-liquid separator 2 through a first pipeline S1, removing foams in the solvent steam by the gas-liquid separator 2, and introducing the solvent steam into a first condenser 3 through a second pipeline S2. The first condenser 3 is provided with a first interface for solvent vapor reflux, and the first interface is connected with the upper end of the rectifying tower 1 through a third pipeline S3. The first condenser 3 is provided with a second port for the escape of evaporated working medium vapor, and the second port is connected with the inlet of the compressor 4 through a fourth pipeline S4. The outlet of the compressor 4 is connected to a first reboiler 5 (reboiler at the bottom of the column) at the bottom of the rectification column 1 via a pipeline (a fifth pipeline S5), and the working medium vapor is condensed into a liquid phase in the first reboiler 5 and flows back to the first condenser 3 via a pipeline (a sixth pipeline S6).
The heat pump rectification method adopting working medium compression utilizes solvent steam (secondary steam) at the top of the tower to carry out heat exchange in a first condenser, liquid working medium of the first condenser is heated, the working medium is evaporated into working medium steam, simultaneously the solvent steam is condensed into liquid phase reflux, the working medium steam is compressed by a compressor, then is heated by a first reboiler, liquid phase at the bottom of the tower is evaporated, simultaneously the working medium steam is condensed into working medium liquid phase, and the working medium liquid phase is circulated back to the first condenser. The rectification working conditions of the tower top temperature and the tower bottom temperature can be adjusted by utilizing the solvent steam, and meanwhile, the working medium is suitable for the rectification working conditions of any tower top temperature and any tower bottom temperature through the selection of the working medium without considering the operating pressure of the rectification tower, and the solvent steam is not directly compressed, so that the intrinsic safety of the process production is ensured, and the application space of the energy-saving technology is expanded to a great extent.
Example 2
The present embodiment provides a heat pump rectification apparatus using working medium compression, which is an improvement on the basis of embodiment 1, and includes a rectification column 1, a gas-liquid separator 2, a first condenser 3, a compressor 4, and a first reboiler 5 in embodiment 1, and the difference is that: the liquid phase at the bottom of the rectifying column 1 is reused. The liquid phase at the bottom of the tower enters a stripping tower 7, the steam at the top of the stripping tower 7 enters a second condenser 8 (a stripping tower condenser), the steam is condensed into a liquid phase and then enters a rectifying tower 1, and the liquid phase at the bottom of the stripping tower 7 is discharged after reaching the index.
Specifically, the bottom of stripping column 7 is connected to second reboiler 6 (stripping column reboiler). The bottom of the rectifying tower 1 is connected with the inlet of the stripping tower 7 through a seventh pipeline S7, and the steam outlet of the stripping tower 7 reflows into the rectifying tower 1 through a pipeline. The stripping column 7 is connected to the second condenser 8 via an eighth line S8, and the second condenser 8 is refluxed into the rectifying column 1 via a ninth line S9.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (6)
1. The utility model provides an adopt heat pump rectifier unit of working medium compression, includes rectifying column (1), its characterized in that: a solvent steam outlet at the top of the rectifying tower (1) is led into the first condenser (3) through a pipeline and exchanges heat with a liquid-phase working medium in the first condenser (3); the solvent vapor in the first condenser (3) flows back to the rectifying tower (1) through a pipeline after being in a liquid phase; the liquid-phase working medium of the first condenser (3) is evaporated into working medium steam, and the working medium steam is connected with the compressor (4) through a pipeline; the compressor (4) pressurizes the working medium steam to make the boiling point temperature of the working medium steam higher than the bottom temperature of the rectifying tower (1); an outlet of the compressor (4) is connected with a first reboiler (5) at the bottom of the rectifying tower (1) through a pipeline, working medium steam is condensed into a liquid phase in the first reboiler (5) and flows back to the first condenser (3) through a pipeline, a solvent steam outlet at the top of the rectifying tower (1) is connected with an inlet of the gas-liquid separator (2) through a first pipeline, mist in the solvent steam is removed by the gas-liquid separator (2), and the solvent steam is introduced into the first condenser (3) through a second pipeline.
2. The heat pump rectification device according to claim 1, wherein: the first condenser (3) is provided with a first interface for solvent steam to flow back, and the first interface is connected with the upper end of the rectifying tower (1) through a third pipeline.
3. The heat pump rectification device according to claim 2, wherein: and the first condenser (3) is provided with a second interface for the escape of evaporated working medium steam, and the second interface is connected with an inlet of the compressor (4) through a fourth pipeline.
4. The heat pump rectification device according to claim 1, wherein: the tower bottom of the rectifying tower (1) is connected with the inlet of the stripping tower (7) through a seventh pipeline, and the steam outlet of the stripping tower (7) flows back into the rectifying tower (1) through a pipeline.
5. The heat pump rectification device according to claim 4, wherein: the bottom of the stripping tower (7) is connected with a second reboiler (6).
6. The heat pump rectification device according to claim 5, wherein: the stripping tower (7) is connected with a second condenser (8) through an eighth pipeline, and the second condenser (8) flows back into the rectifying tower (1) through a ninth pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021785054.0U CN214105865U (en) | 2020-08-24 | 2020-08-24 | Heat pump rectifying device adopting working medium compression |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021785054.0U CN214105865U (en) | 2020-08-24 | 2020-08-24 | Heat pump rectifying device adopting working medium compression |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116789568A (en) * | 2023-06-20 | 2023-09-22 | 沧州大化股份有限公司 | Method for reducing content of hydrolytic chlorine in toluene diisocyanate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116789568A (en) * | 2023-06-20 | 2023-09-22 | 沧州大化股份有限公司 | Method for reducing content of hydrolytic chlorine in toluene diisocyanate |
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