CN106241924B - A kind of power plant's sea water desalination processing unit and method - Google Patents
A kind of power plant's sea water desalination processing unit and method Download PDFInfo
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- CN106241924B CN106241924B CN201610804925.0A CN201610804925A CN106241924B CN 106241924 B CN106241924 B CN 106241924B CN 201610804925 A CN201610804925 A CN 201610804925A CN 106241924 B CN106241924 B CN 106241924B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to a kind of power plant's sea water desalination processing unit and method, belong to energy conservation and environmental protection field.A kind of power plant's sea water desalination processing unit, including：Pretreatment unit；Preheater, is equipped with seawater pipeline A in it, by the seawater pipeline A connection pretreatment units and regulating reservoir, while steam exhaust is passed through inside the preheater；Regulating reservoir, is internally provided with heat exchanger, and the water outlet of the regulating reservoir is sequentially connected primary heater, secondary heater and three-level heater through seawater pipeline B；Intermediate pool, it connects the water outlet of the seawater pipeline B；Distillation device, its water inlet connect the water outlet of the intermediate pool, and the water outlet of the distillation device connects the water inlet of the regulating reservoir, the production mouth of a river connection production pond of the distillation device.The present invention carries out film concentration processing using steam exhaust to seawater, while the thermal efficiency for being advantageously implemented whole power plant maximizes.
Description
Technical field
The present invention relates to a kind of power plant's sea water desalination processing unit and method, belong to energy conservation and environmental protection field.
Background technology
In China, coal fired power generation occupies critical role in energy resource supply.In order to ensure generating efficiency and generating equipment just
Often run, usually require to cool down exhaust steam in steam turbine using substantial amounts of recirculated cooling water in coal-burning power plant, pass through waving for water
Hair brings the heat in steam exhaust in air into, this not only wastes substantial amounts of heat, while consumes up to ten thousand tons of water resource daily, because
How this, recycle the heat in steam exhaust, is always energy-saving field priority research areas.
Membrane distillation (MD) technology is a kind of efficient membrane separation technique, is by controlling waste water temperature, with hydrophobic micropore
Film is separating medium, using film both sides steam pressure difference as mass transfer force, realizes the process of Waste water concentrating and pure water recycling, MD technologies
There is many merits, the retention ultrahigh in efficiency such as to salt, to most nonvolatile matters compared with traditional membrane separation technique
With nearly 100% retention efficiency, and low, operating condition gentle (high-tension apparatus is not required), operation is required influent quality to tie up
Shield is convenient, fouling membrane is less likely to occur and the tradition evaporation of energy consumption ratio is low.In addition, membrane distillation adapts to salt content change in waste water
Property it is strong, separated out as long as solute is unsaturated in theory, membrane module can normal operation.Therefore, sea is carried out using membrane distillation technique
Water desalination is paid attention to be subject to many scholars.Since membrane distillation needs to heat raw water, energy consumption is of a relatively high, this is also
One of an important factor for limiting MD technique large-scale applications.
Therefore, the today being becoming tight in the energy and water resource day, in order to reduce or even avoid largely to use recirculated water, at the same time
The energy is recycled, the efficient thermal energy recycling of exploiting economy and desalination process are of great significance.
The content of the invention
To solve the above problems, it is an object of the invention to provide a kind of power plant's sea water desalination processing unit and method.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of power plant's sea water desalination processing unit, including：
Pretreatment unit, for being pre-processed to seawater；
Preheater, is equipped with seawater pipeline A in it, passes through the water outlet and tune of the seawater pipeline A connections pretreatment unit
The water inlet in pond is saved, while steam exhaust is passed through inside the preheater；
Regulating reservoir, is internally provided with heat exchanger, and the water outlet of the regulating reservoir is sequentially connected level-one heating through seawater pipeline B
Device, secondary heater and three-level heater, wherein, the seawater pipeline B sequentially passes through primary heater, secondary heater and three
Level heater；
Intermediate pool, the water inlet of the intermediate pool connect after primary heater, secondary heater and three-level heater
Connect the water outlet of the seawater pipeline B；
Distillation device, the water inlet of the distillation device connect the water outlet of the intermediate pool, the membrane distillation
The water outlet of device connects the water inlet of the regulating reservoir, the production mouth of a river connection production pond of the distillation device.
Further, the top of the primary heater, secondary heater and three-level heater is respectively equipped with heating steam
Entrance, the bottom of the primary heater, secondary heater and three-level heater are respectively equipped with condensation-water drain.
Further, the water inlet of the condensation-water drain connection secondary heater of the three-level heater, the two level add
The water inlet of the condensation-water drain connection primary heater of hot device, the condensation-water drain of the primary heater connect the heat exchange
The water inlet of device, the water outlet connection boiler of the heat exchanger.
Further, the pretreatment unit is sedimentation basin, oil separator, oxidation pond, softening pond, filter, biochemistry pool
One or more of joints.
Further, the pretreatment unit is through water pump A connection seawater pipelines A；
The water outlet of the regulating reservoir is through water pump B connection seawater pipelines B；
Water inlet of the water outlet of the distillation device through water pump C connection regulating reservoirs, the seawater of intermediate pool is in water pump C
Swabbing action under distillation device and water pump C sequentially entered by intermediate pool, the seawater after distillation device concentration is again
Be back under the swabbing action of water pump C in regulating reservoir, the setting of water pump C at this time take for suction-type water intake mode；Or water
Pump C is arranged between the water outlet of intermediate pool and the water inlet of connection distillation device, and what the setting of water pump C was taken at this time is
Pressure type water intake mode.
Further, the distillation device is using the vacuum membrane distillation method of operation, the gap field orientation method of operation, gas
Sweep one or more of combinations of the formula membrane distillation method of operation, the direct contact membrane distillation method of operation.
A kind of processing method that power plant's sea water desalination is carried out using power plant's sea water desalination processing unit, including it is following
Step：
Step 1, after the preprocessed device pretreatment of seawater, the seawater pipeline A in preheater, steamer are entered by water pump A
Steam exhaust after machine power generation is passed through preheater and enters for the seawater in heating seawater pipeline A, seawater after being heated to 30~55 DEG C
Regulating reservoir；
Step 2, the seawater in the regulating reservoir sequentially enters primary heater, secondary heater and three-level through water pump B and adds
Hot device enters intermediate pool after being heated to 60~98 DEG C；
Step 3, the seawater of intermediate pool sequentially enters distillation device and water pump C under the swabbing action of water pump C, at the same time
Concentration is carried out in distillation device 11；Using such a suction-type water intake mode, the seawater in membrane module is advantageously reduced
Pressure, avoids hydrophobic membrane from penetrating, while can increase film both sides steam pressure difference under equal operating condition, is conducive to improve
The permeant flux of film.
Step 4, the seawater after distillation device concentration is back to regulating reservoir under the swabbing action of water pump C again
In, the condensed water that distillation device produces is collected by producing pond, repeats concentration process；When the seawater in distillation device
When salt content reaches the concentration of emission of setting, the seawater in distillation device is discharged.
The pretreatment sinks to the bottom for chemistry, chemical oxidation, biological treatment, the one or more of filtering or absorption.
The processing method of power plant's sea water desalination is suitable for the various fired power generating units such as water cooling, air-cooled.
Beneficial effects of the present invention are：
The present invention preheats seawater using steam exhaust, while uses step heating system, can not only reduce recirculated water
Dosage, recycles thermal energy, while can reduce the consumption to high-quality steam as far as possible, reduces the shadow to steam turbine power generation efficiency
Ring, therefore the thermal efficiency for being advantageously implemented whole power plant maximizes.
Brief description of the drawings
Fig. 1 is the structure diagram of power plant's sea water desalination processing unit of the present invention；
Wherein, 1- pretreatment units, 2- water pumps A, 3- preheater, 4- regulating reservoirs, 5- heat exchangers, 6- water pumps B, 7- level-one add
Hot device, 8- secondary heaters, 9- three-level heaters, 10- intermediate pools, 11- distillation devices, 12- water pumps C, 13- production pond.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
A kind of power plant's sea water desalination processing unit, including：
Pretreatment unit 1, for being pre-processed to seawater；
Preheater 3, is equipped with seawater pipeline A in it, by the water outlet of the seawater pipeline A connections pretreatment unit 1 and
The water inlet of regulating reservoir 4, while steam exhaust is passed through inside the preheater 3；
Regulating reservoir 4, is internally provided with heat exchanger 5, and the water outlet of the regulating reservoir 4 is sequentially connected level-one through seawater pipeline B
Heater 7, secondary heater 8 and three-level heater 9, wherein, the seawater pipeline B sequentially passes through primary heater 7, two level adds
Hot device 8 and three-level heater 9；
Intermediate pool 10, the water inlet of the intermediate pool 10 are heated in primary heater 7, secondary heater 8 and three-level
The water outlet of the seawater pipeline B is connected after device 9；
Distillation device 11, the water inlet of the distillation device 11 connects the water outlet of the intermediate pool 10, described
The water outlet of distillation device 11 connects the water inlet of the regulating reservoir 4, the production mouth of a river connection production water of the distillation device 11
Pond 13.
The top of the primary heater 7, secondary heater 8 and three-level heater 9 is respectively equipped with heating steam inlet, institute
The bottom for stating primary heater 7, secondary heater 8 and three-level heater 9 is respectively equipped with condensation-water drain.
The water inlet of the condensation-water drain connection secondary heater 8 of the three-level heater 9, the secondary heater 8
Condensation-water drain connects the water inlet of primary heater 7, and the condensation-water drain of the primary heater 7 connects the heat exchanger 5
Water inlet, the heat exchanger 5 water outlet connection boiler.
The pretreatment unit 1 is sedimentation basin, oil separator, oxidation pond, softening pond, filter, one kind or several of biochemistry pool
The joint of kind.
The pretreatment unit 1 is through water pump A2 connection seawater pipelines A；
The water outlet of the regulating reservoir 4 is through water pump B6 connection seawater pipelines B；
Water inlet of the water outlet of the distillation device 11 through water pump C12 connections regulating reservoir 4.
The distillation device 11 sweeps formula film using the vacuum membrane distillation method of operation, the gap field orientation method of operation, gas
Distill one or more of combinations of the method for operation, the direct contact membrane distillation method of operation.
With certain coastal coal-burning power plant, using seawater as process object, handled and filled by power plant's sea water desalination of the present invention
Put and carry out sea water desalination processing, comprise the following steps：
Step 1, seawater enters the sea in preheater 3 after the pretreatment such as coagulating sedimentation, softening, filtering by water pump A2
Waterpipe A, the steam exhaust part after steam turbine power generation are condensed by the recirculated water in condenser, and another part steam exhaust is passed through
Preheater 3 is used for the seawater in heating seawater pipeline A, and the condensed water that steam exhaust condensation produces is back to use boiler after proper treatment
In, seawater enters regulating reservoir 4 after being heated to 30~55 DEG C；
Step 2, the seawater in the regulating reservoir 4 sequentially enters primary heater 7, secondary heater 8 and three through water pump B6
Level heater 9 enters intermediate pool 10 after being heated to 90 DEG C, wherein, the primary heater 7, secondary heater 8, three-level add
Hot device 9 is steamed with No. 8 low-pressure heater inlet steams (about 65 DEG C) of condensed water heat regenerative system, No. 7 low-pressure heater entrances respectively
Vapour (about 90 DEG C), No. 6 (106 DEG C) of low-pressure heater inlet steams are heating steam；The condensed water produced in three-level heater 9 returns
It flow in secondary heater 8, further using waste heat, the condensate return that is produced in secondary heater 9 to primary heater 8
In, further utilize, the condensate return produced in primary heater 8 to heat exchanger 5, further utilizes, to improve whole system
The system thermal efficiency.
Step 3, the seawater of intermediate pool 10 sequentially enters membrane distillation under the swabbing action of water pump C12 by intermediate pool 10
Device 11 and water pump C12, while concentration is carried out in distillation device 11
Step 4, the seawater after 11 concentration of distillation device is back to adjusting under the swabbing action of water pump C12 again
In pond 4, the condensed water that distillation device 11 produces is collected by producing pond 13, is back to the inside and outside production of power plant and life, is repeated
Concentration process.When the seawater salt content in distillation device 11 reaches 20%, discharge seawater further handles completion sea
Water is desalinated.
In the present invention, water pump C12 can be also arranged on to the water inlet end of distillation device 11, i.e., using pressure type water inlet side
Formula.
The main purpose of the pretreatment is to meet the inflow requirement of subsequent heat and membrane distillation processing, can be that chemistry is heavy
Bottom, chemical oxidation, biological treatment, the one or more of filtering or absorption.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
- A kind of 1. power plant's sea water desalination processing unit, it is characterised in that including：Pretreatment unit (1), for being pre-processed to seawater；Preheater (3), is equipped with seawater pipeline A in it, by the water outlet of the seawater pipeline A connections pretreatment unit (1) and The water inlet of regulating reservoir (4), while steam exhaust is passed through the preheater (3) inside；Regulating reservoir (4), is internally provided with heat exchanger (5), and the water outlet of the regulating reservoir (4) is sequentially connected one through seawater pipeline B Level heater (7), secondary heater (8) and three-level heater (9), wherein, the seawater pipeline B sequentially passes through primary heater (7), secondary heater (8) and three-level heater (9), the heating steam of the primary heater (7) is condensed water heat regenerative system No. 8 low-pressure heater inlet steams, the secondary heater (8) heating steam be condensed water heat regenerative system No. 7 low pressure Calorifier inlets steam, the heating steam of the three-level heater (9) are No. 6 low-pressure heater entrances of condensed water heat regenerative system Steam；Intermediate pool (10), the water inlet of the intermediate pool (10) is in primary heater (7), secondary heater (8) and three-level Heater (9) connects the water outlet of the seawater pipeline B afterwards；Distillation device (11), the water inlet of the distillation device (11) connect the water outlet of the intermediate pool (10), institute The water outlet for stating distillation device (11) connects the water inlet of the regulating reservoir (4), the production mouth of a river of the distillation device (11) Connection production pond (13).
- 2. power plant's sea water desalination processing unit according to claim 1, it is characterised in that the primary heater (7), two The top of level heater (8) and three-level heater (9) is respectively equipped with heating steam inlet, and the primary heater (7), two level add The bottom of hot device (8) and three-level heater (9) is respectively equipped with condensation-water drain.
- 3. power plant's sea water desalination processing unit according to claim 2, it is characterised in that the three-level heater (9) The water inlet of condensation-water drain connection secondary heater (8), the condensation-water drain connection level-one heating of the secondary heater (8) The water inlet of device (7), the condensation-water drain of the primary heater (7) connect the water inlet of the heat exchanger (5), the heat exchange The water outlet connection boiler of device (5).
- 4. power plant's sea water desalination processing unit according to claim 1, it is characterised in that the pretreatment unit (1) is Sedimentation basin, oil separator, oxidation pond, softening pond, filter, one or more of joints of biochemistry pool.
- 5. power plant's sea water desalination processing unit according to claim 1, it is characterised in thatThe pretreatment unit (1) is through water pump A (2) connection seawater pipelines A；The water outlet of the regulating reservoir (4) is through water pump B (6) connection seawater pipelines B；Water inlet or water pump C (12) of the water outlet of the distillation device (11) through water pump C (12) connection regulating reservoirs (4) are set Between the water outlet of intermediate pool (10) and the water inlet of distillation device (11).
- 6. power plant's sea water desalination processing unit according to claim 1, it is characterised in that the distillation device (11) is adopted Steamed with the vacuum membrane distillation method of operation, the gap field orientation method of operation, the sweep gas membrane disillation method of operation, direct contact type film Evaporate one or more of combinations of the method for operation.
- 7. a kind of power plant's sea water desalination processing unit using described in any of the above item claim carries out power plant's sea water desalination Processing method, it is characterised in that comprise the following steps：Step 1, after the preprocessed device of seawater (1) pretreatment, the seawater pipeline A in preheater (3) is entered by water pump A (2), Steam exhaust after steam turbine power generation is passed through preheater (3) and is heated to 30~55 DEG C for the seawater in heating seawater pipeline A, seawater Enter regulating reservoir (4) afterwards；Step 2, the seawater in the regulating reservoir (4) sequentially enters primary heater (7), secondary heater (8) through water pump B (6) Enter intermediate pool (10) after being heated to 60~98 DEG C with three-level heater (9)；Step 3, the seawater of intermediate pool (10) sequentially enters film by intermediate pool (10) under the swabbing action of water pump C (12) and steams Distillation unit (11) and water pump C (12), while concentration is carried out in distillation device (11)；Step 4, the seawater after distillation device (11) concentration is back to regulating reservoir under the swabbing action of water pump C (12) (4) in, concentration process is repeated, the condensed water that distillation device (11) produces is collected by producing pond (13)；Work as membrane distillation When seawater salt content in device (11) reaches the concentration of emission of setting, the seawater in distillation device (11) is discharged.
- 8. the processing method of power plant's sea water desalination according to claim 7, it is characterised in that the pretreatment is heavy for chemistry Bottom, chemical oxidation, biological treatment, the one or more of filtering or absorption.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610804925.0A CN106241924B (en) | 2016-09-06 | 2016-09-06 | A kind of power plant's sea water desalination processing unit and method |
| PCT/CN2017/072020 WO2018045709A1 (en) | 2016-09-06 | 2017-01-22 | Power plant seawater desalination treatment device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610804925.0A CN106241924B (en) | 2016-09-06 | 2016-09-06 | A kind of power plant's sea water desalination processing unit and method |
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| CN106241924A CN106241924A (en) | 2016-12-21 |
| CN106241924B true CN106241924B (en) | 2018-05-04 |
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| WO (1) | WO2018045709A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106241961A (en) * | 2016-09-06 | 2016-12-21 | 大唐环境产业集团股份有限公司 | A kind of water treatment facilities utilizing residual heat of electric power plant and method |
| CN106241924B (en) * | 2016-09-06 | 2018-05-04 | 大唐环境产业集团股份有限公司 | A kind of power plant's sea water desalination processing unit and method |
| CN107311256A (en) * | 2017-08-01 | 2017-11-03 | 华北电力大学（保定） | A kind of water charging system of coastal waters thermal power plant |
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| CN201139961Y (en) * | 2007-10-22 | 2008-10-29 | 天津海之凰科技有限公司 | Energy-saving pressure reduction film distillation equipment |
| WO2010059810A2 (en) * | 2008-11-21 | 2010-05-27 | Earthrenew, Inc. | Process and system for desalinating water |
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| CN206033294U (en) * | 2016-09-06 | 2017-03-22 | 大唐环境产业集团股份有限公司 | Seawater desalination processing apparatus of power plant |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106241924B (en) * | 2016-09-06 | 2018-05-04 | 大唐环境产业集团股份有限公司 | A kind of power plant's sea water desalination processing unit and method |
-
2016
- 2016-09-06 CN CN201610804925.0A patent/CN106241924B/en active Active
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2017
- 2017-01-22 WO PCT/CN2017/072020 patent/WO2018045709A1/en active Application Filing
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| CN201139961Y (en) * | 2007-10-22 | 2008-10-29 | 天津海之凰科技有限公司 | Energy-saving pressure reduction film distillation equipment |
| WO2010059810A2 (en) * | 2008-11-21 | 2010-05-27 | Earthrenew, Inc. | Process and system for desalinating water |
| CN101797479A (en) * | 2010-02-25 | 2010-08-11 | 北京理工大学 | Method and device for distillating vacuum film by directly utilizing vapor compression heat pump |
| CN102557339A (en) * | 2011-12-19 | 2012-07-11 | 北京昊业怡生科技有限公司 | Treatment method of landfill leachate |
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|---|---|
| WO2018045709A1 (en) | 2018-03-15 |
| CN106241924A (en) | 2016-12-21 |
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