CN205699528U - Steam turbine compressor associating heat pump rectification system - Google Patents
Steam turbine compressor associating heat pump rectification system Download PDFInfo
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- CN205699528U CN205699528U CN201620188945.5U CN201620188945U CN205699528U CN 205699528 U CN205699528 U CN 205699528U CN 201620188945 U CN201620188945 U CN 201620188945U CN 205699528 U CN205699528 U CN 205699528U
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Abstract
A kind of steam turbine compressor associating heat pump rectification system, belongs to rectification field.The vapour compression machine (2) of this system is dragged by steam turbine (3), and steam turbine (3) is driven by high steam (12)；Charging (6) charging aperture through the cold rear flank of preheater (5) with rectifying column (1) is connected, the overhead vapours outlet of rectifying column (1) sequentially passes through vapour compression machine (2), the hot side of reboiler (4), the hot rear flank of preheater (5) are divided into two-way, one tunnel is connected with the overhead reflux mouth of rectifying column (1) as tower top discharging, a road；Tower reactor outlet is divided into two-way, and the road tower bottom steam import through the cold rear flank of reboiler (4) with rectifying column (1) is connected, and heavy constituent at the bottom of tower is discharged on a road.This utility model reduces the energy consumption in Conventional process.
Description
Technical field
This utility model belongs to rectification field, relates to a kind of steam turbine compressor associating heat pump rectification system.
Background technology
Rectification is the character utilizing liquid mixture the most each component volatilization degree different, through the vaporization of many second part and repeatedly partial condensation in tower, make the process that each component is kept completely separate, it is industrial most widely used liquid mixture lock out operation, is widely used in the departments such as oil, chemical industry, light industry, food, metallurgy.
Owing to distillation process needs to vaporize liquid phase, therefore distillation process is the maximum unit process that consumes energy in chemical industry.Someone estimate the energy consumption of separation process constitute about whole chemical industry can 40%, and wherein 95% be still-process consume.Therefore for how reducing the energy consumption of distillation operation, a practical and important problem is become.
The refrigeration system gone in reboiler delivered to by a kind of condenser material heat pump of heat pump.Heat pump distillation is based on the second law of thermodynamics, adds certain mechanical power to system, heats up, overhead vapours pressurization relatively low for temperature as the thermal source of high temperature tower reactor.Because the latent heat reclaimed is for process itself, eliminates again overhead condenser, cooling water and tower reactor and add vapours, the energy consumption of rectification can be made substantially to reduce.Existing relevant heat pump rectification system often uses motor drag compressor to heat up to realize steam pressurization.
Steam turbine is the rotary power machinery that the energy of steam is converted into mechanical power, is mainly used as prime mover of generating, it is possible to directly drive various pumps, blower fan, compressor and propeller for vessels etc..In actual production process, often there is high pressure steam boiler in enterprise, and high steam enters associated heat exchanger after pipeline conveying decompression and carries out heat exchange.Can the most well be utilized from the pressure of high pressure to low pressure.
If steam turbine and vapour compression machine being used in combination composition heat pump be used in rectification, the energy consumption of rectification cell can be substantially reduced, utilize high-pressure steam pressure energy efficiently simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of heat pump rectification system utilizing steam turbine to drag compressor and method, reduces the energy consumption in Conventional process.
A kind of steam turbine compressor associating heat pump rectification system, it is characterised in that: it is made up of rectifying column, vapour compression machine, steam turbine, reboiler, preheater；Described rectifying column has charging aperture, overhead reflux mouth, overhead vapours outlet, tower reactor outlet, tower bottom steam import；Described vapour compression machine is dragged by steam turbine, and steam turbine is driven by high steam；Charging is connected with the charging aperture of rectifying column through the cold rear flank of preheater, the overhead vapours outlet of rectifying column sequentially passes through vapour compression machine, the hot side of reboiler, the hot rear flank of preheater are divided into two-way, one tunnel is connected with the overhead reflux mouth of rectifying column as tower top discharging, a road；Tower reactor outlet is divided into two-way, and a road is connected with the tower bottom steam import of rectifying column through the cold rear flank of reboiler, and heavy constituent at the bottom of tower is discharged on a road.
The rectificating method of steam turbine compressor associating heat pump rectification system, it is characterised in that including procedure below: compressor is dragged by steam turbine, steam turbine is driven by high steam；The main separation task of charging completes in the tower of rectifying column, overhead vapours heats up through vapour compression machine boosting, after rear pressure steam after compression enters the hot side of reboiler and tower reactor liquid phase heat exchange, it is condensed into liquid phase, the hot side of the preheated device of this liquid phase, after preheating the raw material of cold side, a part is as tower top discharging, and a part is as the backflow of rectifying column；Tower reactor outlet is divided into two-way, and a road is connected with refluxing opening at the bottom of the tower of rectifying column through the cold rear flank of reboiler, and a road is as heavy constituent discharging at the bottom of tower.
Described rectifying column is plate column structure, or packed tower structure.
Described vapour compression machine is roots-type, or centrifugal, or double-screw type.
Described reboiler is plate-type heat exchange structure, or forced circulation heat exchange structure.
The utility model has the advantage of: utilize the mode of heat pump distillation, compared with tradition rectification mode, the consumption of a large amount of condensed water and steam can be saved, utilize steam turbine to drag compressor and can make full use of the pressure energy of high steam, operating cost can be substantially reduced, energy consumption is about the 30% of tradition rectification, meets the requirement of industry energy conservation consumption reduction.
Accompanying drawing explanation
Fig. 1-steam turbine compressor associating heat pump technology flow chart；
Fig. 2-original distillation process figure；
Label title in figure: 1-rectifying column tower body；2-compressor；3-steam turbine；4-reboiler；5-preheater；6-feeds；7-overhead vapours；Steam after 8-pressure；9-tower top discharging；10-overhead reflux；11-tower reactor discharging；12-high steam；13-low-pressure steam；14-condensed water.
Detailed description of the invention
Below in conjunction with the accompanying drawings to illustrating:
Certain unit existing has carbon 4 separating rectification tower one, and separation task is iso-butane and normal butane, and wherein iso-butane content is 45%, and treating capacity is 40t/h, and existing high-pressure steam pressure is 3.1MPa.
The device of a kind of heat pump distillation utilizing steam turbine to drag compressor is mainly by rectifying column 1, vapour compression machine 2, steam turbine 3, reboiler 4, and preheater 5 forms.
Described rectifying column 1 uses packed tower, iso-butane separates with normal butane and completes in tower, and overhead vapours 7 heats up through vapour compression machine 2 boosting, and the steam 8 after compression is as the thermal source of reboiler 4, after reboiler 4 heat exchange, steam is condensed into liquid phase, and after this liquid phase preheated device 5 preheating material 6, a part is as tower top discharging 9, a part is as the backflow 10 of rectifying column, tower reactor extraction heavy constituent 11, compressor 2 is dragged by steam turbine 3, and steam turbine 3 is driven by high steam 12.
Described rectifying column operation pressure is 890kPa, and reflux ratio is 12.
Described vapour compression machine can be the form such as roots-type, centrifugal, twin screw, and compression ratio is 2, and Compressor Discharge Pressure is 1.8MPa, and temperature is 83 DEG C.
Described steam turbine admission pressure is 3.1MPa, and pressure at expulsion is 0.7MPa, and power is 1500kW, and rotating speed is 5000r/min.
Described preheater is feed preheater, and thermal source is steam condensate.
Described reboiler is tower top compressed steam and tower reactor liquid phase heat exchange place, and its form can be the modes such as plate type heat exchanger, forced circulation heat exchange.
Compared with tradition distillation system (accompanying drawing 2), employing heat pump rectification system can steam saving 13.5t/h.Calculate with current price, 160 yuan/t of steam, use steam turbine to drag the heat pump of compressor, 12,960,000/year of operating cost can be saved.(the annual operation time presses 8000h and calculates)
From above-mentioned case it can be seen that the factory having high steam, the heat pump rectification system using steam turbine to drag compressor can save substantial amounts of operating cost, serves energy-saving and cost-reducing effect.
Claims (4)
1. a steam turbine compressor associating heat pump rectification system, it is characterised in that:
It is made up of rectifying column (1), vapour compression machine (2), steam turbine (3), reboiler (4), preheater (5)；
Described rectifying column (1) has charging aperture, overhead reflux mouth, overhead vapours outlet, tower reactor outlet, tower bottom steam import；
Described vapour compression machine (2) is dragged by steam turbine (3), and steam turbine (3) is driven by high steam (12)；
Charging (6) charging aperture through the cold rear flank of preheater (5) with rectifying column (1) is connected, the overhead vapours outlet of rectifying column (1) sequentially passes through vapour compression machine (2), the hot side of reboiler (4), the hot rear flank of preheater (5) are divided into two-way, one tunnel is connected with the overhead reflux mouth of rectifying column (1) as tower top discharging, a road；
Tower reactor outlet is divided into two-way, and the road tower bottom steam import through the cold rear flank of reboiler (4) with rectifying column (1) is connected, and heavy constituent at the bottom of tower is discharged on a road.
Steam turbine compressor the most according to claim 1 associating heat pump rectification system, it is characterised in that: described rectifying column is plate column structure, or packed tower structure.
Steam turbine compressor the most according to claim 1 associating heat pump rectification system, it is characterised in that: described vapour compression machine (2) is roots-type, or centrifugal, or double-screw type.
Steam turbine compressor the most according to claim 1 associating heat pump rectification system, it is characterised in that: described reboiler (4) is plate-type heat exchange structure, or forced circulation heat exchange structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620188945.5U CN205699528U (en) | 2016-03-14 | 2016-03-14 | Steam turbine compressor associating heat pump rectification system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620188945.5U CN205699528U (en) | 2016-03-14 | 2016-03-14 | Steam turbine compressor associating heat pump rectification system |
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| CN205699528U true CN205699528U (en) | 2016-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124343A (en) * | 2019-04-08 | 2019-08-16 | 浙江洁普环保科技有限公司 | Working medium heat-pump rectifying process |
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2016
- 2016-03-14 CN CN201620188945.5U patent/CN205699528U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124343A (en) * | 2019-04-08 | 2019-08-16 | 浙江洁普环保科技有限公司 | Working medium heat-pump rectifying process |
| CN110124343B (en) * | 2019-04-08 | 2021-12-14 | 浙江洁普环保科技有限公司 | Working medium heat pump rectification process |
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