CN105664517A - Turbine and compressor combined heat pump rectification system and method - Google Patents
Turbine and compressor combined heat pump rectification system and method Download PDFInfo
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- CN105664517A CN105664517A CN201610139756.3A CN201610139756A CN105664517A CN 105664517 A CN105664517 A CN 105664517A CN 201610139756 A CN201610139756 A CN 201610139756A CN 105664517 A CN105664517 A CN 105664517A
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- tower
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- steam turbine
- rectifying column
- reboiler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/007—Energy recuperation; Heat pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
- B01D3/4211—Regulation; Control of columns
- B01D3/4294—Feed stream
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a turbine and compressor combined heat pump rectification system and method, and belongs to the field of rectification.A steam compressor (2) of the system is dragged by a turbine (3), and the turbine (3) is driven by high-pressure steam (12).A fed material (6) passes through the cold side of a preheater (5) and then is connected with a feeding port of a rectification tower (1), a tower top steam outlet of the rectification tower (1) passes through the steam compressor (2), the hot side of a reboiler (4) and the hot side of the preheater (5) in sequence and then is divided into two paths, one path is used for tower top discharging, and the other path is connected with a top tower return port of the rectification tower (1).A tower kettle outlet is divided into two paths, one path passes through the cold side of the reboiler (4) and then is connected with a tower bottom steam inlet of the rectification tower (1), and the other path is used for discharging heavy components at the tower bottom.By means of the turbine and compressor combined heat pump rectification system and method, energy consumption in the traditional production process is lowered.
Description
Technical field
The invention belongs to rectification field, relate to a kind of steam turbine compressor associating heat pump rectification system and method.
Background technology
Rectification is to utilize the liquid mixture character that each component volatilization degree is different under a certain pressure, 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 heat pump substantially a kind of condenser material heat pump. Heat pump distillation is based on the second law of thermodynamics, adds certain mechanical power to system, overhead vapours pressurization relatively low for temperature is heated up, 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 adopts motor drag compressor to heat up to realize steam pressurized.
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 often well do not utilized from high pressure to the pressure of low pressure.
If steam turbine and vapour compression machine being used in combination composition heat pump and being used in rectification, the energy consumption of rectification cell can be substantially reduced, utilize high-pressure steam pressure energy efficiently simultaneously.
Summary of the invention
It is an object of the invention to provide a kind of heat pump rectification system utilizing steam turbine to drag compressor and method, reduce the energy consumption in Conventional process.
A kind of steam turbine compressor associating pump rectification method, 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, rectifying column overhead vapours outlet sequentially pass through vapour compression machine, the hot side of reboiler, preheater hot rear flank be divided into two-way, one tunnel is as tower top discharging, and a road is connected with the overhead reflux mouth of rectifying column; 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.
It is an advantage of the current invention that: 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;
Number in the figure title: 1-rectifying column tower body; 2-compressor; 3-steam turbine; 4-reboiler; 5-preheater; 6-charging; 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.
It is embodied as example
Below in conjunction with accompanying drawing 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 adopts packed tower, iso-butane completes in tower with separating of normal butane, 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, adopt 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, adopt the heat pump rectification system that steam turbine drags compressor can save substantial amounts of operating cost, serve energy-saving and cost-reducing effect.
Claims (5)
1. a steam turbine compressor associating pump rectification method, 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);
The charging (6) charging aperture through the cold rear flank of preheater (5) with rectifying column (1) is connected, rectifying column (1) overhead vapours outlet sequentially pass through vapour compression machine (2), the hot side of reboiler (4), preheater (5) hot rear flank be divided into two-way, one tunnel is as tower top discharging, and a road is connected with the overhead reflux mouth of rectifying column (1);
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.
2. steam turbine compressor 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.
3. steam turbine compressor 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.
4. steam turbine compressor 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.
5. the rectificating method of steam turbine compressor according to claim 1 associating heat pump rectification system, it is characterised in that include procedure below:
Compressor is dragged by steam turbine, and steam turbine is driven by high steam;
The main separation task of charging (6) completes in the tower of rectifying column (1), overhead vapours heats up through vapour compression machine (2) boosting, after rear pressure steam (8) after compression enters reboiler (4) hot side and tower reactor liquid phase heat exchange, it is condensed into liquid phase, this liquid phase preheated device (5) hot side, 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 (1);
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 (1) through the cold rear flank of reboiler (4), and a road is as heavy constituent discharging at the bottom of tower.
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| CN201610139756.3A CN105664517A (en) | 2016-03-14 | 2016-03-14 | Turbine and compressor combined heat pump rectification system and method |
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| CN201610139756.3A CN105664517A (en) | 2016-03-14 | 2016-03-14 | Turbine and compressor combined heat pump rectification system and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237643A (en) * | 2016-10-08 | 2016-12-21 | 中国科学院理化技术研究所 | A kind of MVR heat pump rectification system |
| CN107029442A (en) * | 2017-06-21 | 2017-08-11 | 江苏北松健康产业有限公司 | A kind of redistillation system and production system for drug extract |
| CN107158734A (en) * | 2017-06-21 | 2017-09-15 | 河北乐恒化工设备制造有限公司 | The device and its energy-efficient concentrating method of N ethyl piperazidines of energy-efficient concentrate |
| CN108211404A (en) * | 2016-12-21 | 2018-06-29 | 中国石油化工股份有限公司 | Alkylated reaction device and alkylated reaction separation method |
| CN108211405A (en) * | 2016-12-21 | 2018-06-29 | 中国石油化工股份有限公司 | Alkylated reaction device and alkylated reaction separation method |
| CN112827207A (en) * | 2021-02-25 | 2021-05-25 | 浙江宸轩透平机制造有限公司 | Mechanical chemical medium vapor recompression rectification device and method |
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| JPS57209602A (en) * | 1981-06-22 | 1982-12-23 | Hidemasa Tsuruta | Vapor re-compression type distillation |
| CN103566612A (en) * | 2012-08-06 | 2014-02-12 | 南通醋酸纤维有限公司 | Compression heat pump rectification device and process |
| CN204601654U (en) * | 2015-01-22 | 2015-09-02 | 苏州天荣能源环境科技有限公司 | The open type heat pump distillation system of cooling in a kind of compression process band |
| CN105194894A (en) * | 2015-09-01 | 2015-12-30 | 江苏乐科热力科技有限公司 | Small heat transfer temperature difference falling film evaporation rectifying system and working method thereof |
| CN105218315A (en) * | 2015-10-09 | 2016-01-06 | 吴嘉 | A kind of divided-wall distillation column that uses refines method and the device of methyl alcohol in conjunction with heat pump |
| CN105363235A (en) * | 2015-12-07 | 2016-03-02 | 中建安装工程有限公司 | Heat pump rectification device and method for removing sulfide in MTBE |
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2016
- 2016-03-14 CN CN201610139756.3A patent/CN105664517A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS57209602A (en) * | 1981-06-22 | 1982-12-23 | Hidemasa Tsuruta | Vapor re-compression type distillation |
| CN103566612A (en) * | 2012-08-06 | 2014-02-12 | 南通醋酸纤维有限公司 | Compression heat pump rectification device and process |
| CN204601654U (en) * | 2015-01-22 | 2015-09-02 | 苏州天荣能源环境科技有限公司 | The open type heat pump distillation system of cooling in a kind of compression process band |
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| CN105363235A (en) * | 2015-12-07 | 2016-03-02 | 中建安装工程有限公司 | Heat pump rectification device and method for removing sulfide in MTBE |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237643A (en) * | 2016-10-08 | 2016-12-21 | 中国科学院理化技术研究所 | A kind of MVR heat pump rectification system |
| CN106237643B (en) * | 2016-10-08 | 2018-06-26 | 中国科学院理化技术研究所 | A kind of MVR heat pump rectification systems |
| CN108211404A (en) * | 2016-12-21 | 2018-06-29 | 中国石油化工股份有限公司 | Alkylated reaction device and alkylated reaction separation method |
| CN108211405A (en) * | 2016-12-21 | 2018-06-29 | 中国石油化工股份有限公司 | Alkylated reaction device and alkylated reaction separation method |
| CN108211404B (en) * | 2016-12-21 | 2023-09-05 | 中国石油化工股份有限公司 | Alkylation reaction device and alkylation reaction separation method |
| CN108211405B (en) * | 2016-12-21 | 2024-03-12 | 中国石油化工股份有限公司 | Alkylation reaction device and alkylation reaction separation method |
| CN107029442A (en) * | 2017-06-21 | 2017-08-11 | 江苏北松健康产业有限公司 | A kind of redistillation system and production system for drug extract |
| CN107158734A (en) * | 2017-06-21 | 2017-09-15 | 河北乐恒化工设备制造有限公司 | The device and its energy-efficient concentrating method of N ethyl piperazidines of energy-efficient concentrate |
| CN112827207A (en) * | 2021-02-25 | 2021-05-25 | 浙江宸轩透平机制造有限公司 | Mechanical chemical medium vapor recompression rectification device and method |
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Application publication date: 20160615 |
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