CN216824851U - Distillation device for directly compressing and backheating distillation steam - Google Patents
Distillation device for directly compressing and backheating distillation steam Download PDFInfo
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- CN216824851U CN216824851U CN202123132422.9U CN202123132422U CN216824851U CN 216824851 U CN216824851 U CN 216824851U CN 202123132422 U CN202123132422 U CN 202123132422U CN 216824851 U CN216824851 U CN 216824851U
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Abstract
The utility model provides a distillation plant that direct compression of distillation steam was backhauled, including distillation column, steam check valve, steam mixing tank, control valve, oil-free steam compressor, steam storage tank, pressure regulating valve, distillation column reboiler, expansion valve, vapour and liquid separator, secondary steam check valve, stop valve, steam cooler. The utility model discloses utilizing the temperature that does not have oil vapor compressor to improve distillation steam, making it get into the distillation column reboiler, for the distillation process provides heat energy, making the condensation of distillation steam simultaneously, making originally the steam condensation heat of being discharged obtain abundant recycle, traditional distillation process relatively saves 50% -80% primary energy consumption to improve the primary energy availability factor of distillation process, realize energy saving and emission reduction's purpose.
Description
Technical Field
The utility model relates to a technical field of distillation technology, more specifically relates to an energy-conserving distillation plant of direct compression backheat of distillation steam.
Background
The distillation process is widely applied to the production and processing of food, the purification of chemical products and medicines, and common production, processing and distillation processes comprise the concentration of white spirit and honey, the desalination of seawater and the like. Common chemical purification includes preparation of industrial alcohol, purification of perfume essential oil, glycerin, acetone and butanol, solvent recovery in extraction process, petroleum fractionation and the like.
At present, the distillation process mainly comprises atmospheric distillation, reduced pressure distillation, steam distillation, pressure distillation, molecular distillation and the like. Distillation modes such as rectification, molecular distillation and common distillation are common distillation modes. The distillation equipment mainly comprises a distillation tower, a condenser, a reboiler and the like, the molecular distillation equipment comprises a falling film type molecular distillation device, a wiped film type molecular distillation device, a centrifugal type molecular distillation device and the like, and the common distillation equipment comprises an evaporator and a condenser. However, most of the existing distillation methods have large demand for high-grade energy, and simultaneously have large dissipation of low-grade waste heat, especially heat energy carried by steam in the rectification process, so that the primary energy utilization efficiency is low, and the environmental protection performance is poor.
Therefore, a technical scheme for solving the problem of efficient utilization of low-grade waste heat in a distillation process is urgently needed in the prior art.
SUMMERY OF THE UTILITY MODEL
To the deficiency of the prior art, the utility model provides a distillation plant of direct compression backheat of distillation steam.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a distillation device for directly compressing and backheating distillation steam comprises a distillation tower, a primary steam check valve, a steam mixing tank, a control valve, an oil-free steam compressor, a steam storage tank, a pressure regulating valve, a distillation tower reboiler, an expansion valve, a gas-liquid separator, a secondary steam check valve, a stop valve and a steam cooler, wherein the distillation tower reboiler is provided with a material inlet, a compressed steam inlet and a condensate outlet, the distillation tower is provided with a primary steam outlet, the steam mixing tank is provided with a primary steam inlet, a secondary steam inlet and a mixed steam outlet, the gas-liquid separator is provided with a gas-liquid two-phase mixture inlet, a secondary steam outlet and a liquid distillation product outlet, the primary steam outlet of the distillation tower is connected with the inlet of the primary steam check valve, the compressed steam inlet of the distillation tower reboiler is connected with the outlet of the pressure regulating valve, the condensate outlet is connected with the inlet of the expansion valve, the outlet of the expansion valve is connected with the inlet of the gas-liquid two-phase mixture of the gas-liquid separator, the secondary steam outlet of the gas-liquid separator is connected with the inlet of the secondary steam check valve, the outlet of the secondary steam check valve is connected with the secondary steam inlet of the steam mixing tank, the outlet of the primary steam check valve is connected with the primary steam inlet of the steam mixing tank, the mixed steam outlet of the steam mixing tank is respectively connected with the inlet of the control valve and the inlet of the stop valve, the outlet of the control valve is connected with the inlet of the oil-free steam compressor, the outlet of the stop valve is connected with the inlet of the steam cooler, the outlet of the steam cooler is connected with the outlet of the liquid distillation product of the gas-liquid separator, the oil-free vapor compressor's steam outlet with the access connection of steam storage tank, the export of steam storage tank with pressure regulating valve's access connection.
The oil-free vapor compressor adopts one of a closed vapor compressor, a semi-closed vapor compressor or an open vapor compressor, and is in the form of a double screw, a scroll or a centrifugal type.
The steam cooler adopts an air-cooled condensing heat exchanger or a water-cooled condensing heat exchanger.
The utility model discloses compare prior art's beneficial effect is:
1. the utility model discloses well oil-free compressor uses less high-grade energy as the cost, through the steam that the direct compression distillation process produced, improves its temperature and pressure, makes it be used for heating the reboiler material to realize the utilization of the waste heat that steam takes, compare traditional distillation process, can reduce 50% -80% to the demand of high-grade energy;
2. compare traditional distillation process, the utility model discloses an expansion valve comes throttle high pressure condensate, obtains low pressure gas-liquid mixture, obtains liquid distillation product through vapour and liquid separator, has reduced the condenser load.
Drawings
Fig. 1 is a system diagram of the present invention.
Reference numerals: the system comprises a distillation tower 1, a primary steam check valve 2, a steam mixing tank 3, a control valve 4, an oil-free steam compressor 5, a steam storage tank 6, a pressure regulating valve 7, a distillation tower reboiler 8, an expansion valve 9, a gas-liquid separator 10, a secondary steam check valve 11, a stop valve 12 and a steam cooler 13.
Detailed Description
The invention will be further elucidated below on the basis of a specific embodiment.
The distillation apparatus for directly compressing and regenerating the heat of the distillation steam as shown in fig. 1 comprises a distillation tower 1, a primary steam check valve 2, a steam mixing tank 3, a control valve 4, an oil-free steam compressor 5, a steam storage tank 6, a pressure regulating valve 7, a distillation tower reboiler 8, an expansion valve 9, a gas-liquid separator 10, a secondary steam check valve 11, a stop valve 12 and a steam cooler 13. A material inlet a, a compressed steam inlet c and a condensate outlet d are arranged on the distillation tower reboiler 8, a primary steam outlet e is arranged on the distillation tower 1, a primary steam inlet f, a secondary steam inlet g and a mixed steam outlet h are arranged on the steam mixing tank 3, a gas-liquid two-phase mixture inlet, a secondary steam outlet and a liquid distillation product outlet are arranged on the gas-liquid separator 10, the primary steam outlet e of the distillation tower 1 is connected with an inlet of the primary steam check valve 2, the compressed steam inlet c of the distillation tower reboiler 8 is connected with an outlet of the pressure regulating valve 7, the high-pressure condensate outlet d is connected with an inlet of the expansion valve 9, an outlet of the expansion valve 9 is connected with the gas-liquid two-phase mixture inlet of the gas-liquid separator 10, the secondary steam outlet of the gas-liquid separator 10 is connected with an inlet of the secondary steam check valve 11, an outlet of the secondary steam check valve 11 is connected with the secondary steam inlet g of the steam mixing tank 3, export and the steam mixing jar 3 of the export of steam check valve 2 once are connected with the import f of steam mixing jar 3, the mixed steam outlet h of steam mixing jar 3 respectively with control valve 4's import, stop valve 12's access connection, control valve 4's export and the access connection who does not have oil vapor compressor 5, stop valve 12's export and steam cooler 13's access connection, steam cooler 13's export and gas-liquid separator 10's liquid distillation product outlet b are connected, do not have the steam outlet of oil vapor compressor 5 and steam storage tank 6's access connection, steam storage tank 6's export and pressure regulating valve 7's access connection.
Wherein, the oil-free vapor compressor 5 adopts one of a closed vapor compressor, a semi-closed vapor compressor or an open vapor compressor, and the form of the oil-free vapor compressor 5 is one of a double screw type, a scroll type or a centrifugal type. The steam cooler 13 adopts an air-cooled condensing heat exchanger or a water-cooled condensing heat exchanger. In this embodiment, the oil-free vapor compressor 5 is a double-screw hermetic vapor compressor, and the vapor cooler 13 is an air-cooled condensing heat exchanger.
The distillation method for directly compressing and regenerating the heat of the distillation steam by adopting the device comprises the following three steps:
specifically, the stage before the generation of the material steam is step S1, which is called a start-up stage; the stage after the generation of the material steam is step S2, which is called a steady operation stage; finally, the oil-free compressor 5 is stopped at step S3, which is called a stop stage.
A starting stage: opening a material inlet a of the distillation tower reboiler, filling the material to a specified height, and adopting modes of electric heating, heat conduction oil furnace heating and the like to enable the distillation tower reboiler to reach the operation temperature and generate enough primary steam, namely completing the starting stage, wherein the amount of the primary steam can be controlled through a preset value.
And (3) a stable operation stage: closing an external heating device, stopping heating, opening a control valve 4, keeping a stop valve 12 closed, starting an oil-free steam compressor 5, enabling primary steam to enter the oil-free steam compressor 5 through a steam mixing tank and be compressed into high-temperature high-pressure steam, enabling the high-temperature high-pressure steam to enter a steam storage tank 6 and then enter a distillation tower reboiler 8 through a pressure regulating valve 7 to heat materials in the oil-free steam compressor, enabling the primary steam to be condensed into high-pressure condensate, enabling the high-pressure condensate to enter an expansion valve 9, enabling the high-pressure condensate to pass through the expansion valve 9 and then be decompressed and expanded to become a low-pressure gas-liquid mixture, enabling the low-pressure gas-liquid mixture to enter a gas-liquid separator 10 to realize a gas-liquid separator and generate a liquid distillation product and secondary steam, enabling the liquid distillation product to enter the next step of a distillation process through a liquid distillation product outlet b, enabling the secondary steam to enter a steam mixing tank 3 and then enter the oil-free compressor 5, thereby completing the corresponding cycle of the stable operation stage. The distillation system continuously transfers heat from primary steam to liquid material through the circulation, the liquid material continuously obtains heat in a reboiler of the distillation tower, returns to the steam mixing tank 3, is compressed by the oilless steam compressor 5, becomes high-temperature and high-pressure mixed steam with the temperature higher than the standard evaporation temperature, and enters a stable operation stage at the moment.
A shutdown stage: the oil-free vapor compressor 5 is shut off, the control valve 4 is closed, the stop valve 12 is opened, and the vapor cooler 13 is started until the vapor in the system is completely converted into liquid distillation product.
The middle oil-free vapor compressor 5 of the utility model can prevent the pollution of the lubricating oil of the compressor to the rectification product, and the load adjustment is realized through the frequency converter or the air outlet slider of the oil-free vapor compressor 5 so as to adapt to the load change in the distillation process; the steam storage tank 6 is used for ensuring the stability of the system; the pressure regulating valve 7 is used for regulating the exhaust pressure of the oil-free vapor compressor 5 to realize the condensation pressure of the vapor entering the distillation tower reboiler 8.
The above description is only the preferred embodiment of the present invention, but the present invention is not limited to the above-mentioned specific embodiments, and for those skilled in the art, a plurality of modifications and improvements can be made without departing from the inventive concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention.
Claims (3)
1. A distillation device for directly compressing and backheating distillation steam is characterized by comprising a distillation tower (1), a primary steam check valve (2), a steam mixing tank (3), a control valve (4), an oil-free steam compressor (5), a steam storage tank (6), a pressure regulating valve (7), a distillation tower reboiler (8), an expansion valve (9), a gas-liquid separator (10), a secondary steam check valve (11), a stop valve (12) and a steam cooler (13), wherein the distillation tower reboiler (8) is provided with a material inlet, a compressed steam inlet and a condensate outlet, the distillation tower (1) is provided with a primary steam outlet, the steam mixing tank (3) is provided with a primary steam inlet, a secondary steam inlet and a mixed steam outlet, the gas-liquid separator (10) is provided with a gas-liquid two-phase mixture inlet, a secondary steam outlet and a liquid distillation product outlet, the primary steam outlet of the distillation tower (1) is connected with the inlet of the primary steam check valve (2), the compressed steam inlet of the distillation tower reboiler (8) is connected with the outlet of the pressure regulating valve (7), the condensate outlet is connected with the inlet of the expansion valve (9), the outlet of the expansion valve (9) is connected with the inlet of the gas-liquid two-phase mixture of the gas-liquid separator (10), the secondary steam outlet of the gas-liquid separator (10) is connected with the inlet of the secondary steam check valve (11), the outlet of the secondary steam check valve (11) is connected with the secondary steam inlet of the steam mixing tank (3), the outlet of the primary steam check valve (2) is connected with the primary steam inlet of the steam mixing tank (3), and the mixed steam outlet of the steam mixing tank (3) is respectively connected with the inlet of the control valve (4), And the access connection of stop valve (12), the export of control valve (4) with the access connection of oil-free steam compressor (5), the export of stop valve (12) with the access connection of steam cooler (13), the export of steam cooler (13) with vapour and liquid separator (10) liquid distillation product exit linkage, the steam outlet of oil-free steam compressor (5) with the access connection of steam storage tank (6), the export of steam storage tank (6) with the access connection of pressure regulating valve (7).
2. A distillation unit for direct compression recuperation of distillation vapor according to claim 1, characterized in that said oil-free vapor compressor (5) is one of a hermetic vapor compressor, a semi-hermetic vapor compressor or an open vapor compressor, said oil-free vapor compressor (5) being in the form of one of a twin screw, a scroll or a centrifugal compressor.
3. A distillation apparatus for direct compression recuperation of distillation vapor according to claim 1, characterized in that the vapor cooler (13) is an air-cooled condensing heat exchanger or a water-cooled condensing heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123132422.9U CN216824851U (en) | 2021-12-14 | 2021-12-14 | Distillation device for directly compressing and backheating distillation steam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123132422.9U CN216824851U (en) | 2021-12-14 | 2021-12-14 | Distillation device for directly compressing and backheating distillation steam |
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| CN216824851U true CN216824851U (en) | 2022-06-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114225446A (en) * | 2021-12-14 | 2022-03-25 | 天津商业大学 | Distillation device and method for directly compressing and backheating distillation steam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114225446A (en) * | 2021-12-14 | 2022-03-25 | 天津商业大学 | Distillation device and method for directly compressing and backheating distillation steam |
| CN114225446B (en) * | 2021-12-14 | 2024-05-14 | 天津商业大学 | Distillation device and method for directly compressing and backheating distillation vapor |
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