CN103896350B - A kind of island seawater desalination system and method - Google Patents
A kind of island seawater desalination system and method Download PDFInfo
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- CN103896350B CN103896350B CN201410114722.XA CN201410114722A CN103896350B CN 103896350 B CN103896350 B CN 103896350B CN 201410114722 A CN201410114722 A CN 201410114722A CN 103896350 B CN103896350 B CN 103896350B
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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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- 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
- Y02A20/138—Water desalination using renewable energy
- Y02A20/141—Wind power
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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- Y02E10/76—Power conversion electric or electronic aspects
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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
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Abstract
The invention discloses a kind of island seawater desalination system and method.Described island seawater desalination system comprises supply of electric power control system, diesel residual heat recovery system, low temperature multiple-effect distillation system; Described supply of electric power control system comprises wind-driven generator and controller, diesel engine generator and controller thereof, inverter and master controller; Described diesel residual heat recovery system comprises radiator, heat exchanger and temperature control three-way flow regulating valve; Low temperature multiple-effect distillation system comprises low temperature multiple-effect distillation device and heating water tank.Island of the present invention seawater desalination system and method, with based on wind-powered electricity generation, bavin is sent out is that auxiliary island wind/bavin complementary power generation system matches, and adopts low temperature multiple-effect distillation Apparatus and method for desalinate seawater; When wind-powered electricity generation is sufficient, unnecessary wind-powered electricity generation is realized desalinization; Wind-powered electricity generation realizes desalinization by diesel engine generator waste heat time not enough; There is very strong adaptability to extremely unstable wind-powered electricity generation, and ensure can realize desalinization under different powering mode.
Description
Technical field
The present invention relates to field of seawater desalination, particularly relate to a kind of island seawater desalination system and method.
Background technology
China coastline is very long, and offshore islands spread all over the place.But most sea island resources lack of water, fresh water total amount is limited; And electric power supply system difficulty is connected with continental Grid in island, there is the problems such as price is high, power supply instability.Therefore, water and electricity supply is Islands Exploitation problem demanding prompt solution.
Exploitation island wind energy is the important channel solving island supply of electric power.Wind speed is randomness at nature, and wind-driven generator exert oneself and the cube of wind speed is directly proportional, therefore wind-powered electricity generation has strong unsteadiness.In addition, wind power output and workload demand correspondence poor.In China, annual period that seven Augusts, network load was maximum just, and now output of wind electric field is general less, namely season wind power output and workload demand correspondence poor.Within one day, the wind speed in evening is larger than daytime, and the workload demand in electrical network evening declines after midnight, and exerting oneself of wind energy turbine set increases on the contrary, namely round the clock wind power output and workload demand correspondence poor.Under current technical conditions, the unsteadiness of wind-powered electricity generation needs to be solved by the electricity generation system of exploitation multi-source complementation, and wind/bavin complementary power generation system solves the important means of island for electrical stability.
As the increment technique of increasing income of water resources, desalinization has become solution the freshwater supply to sea island even important channel of global water resources crisis.But desalinization is also a kind of technology of changing water resources with the energy, and energy consumption problem can not be ignored.At present, the desalination technology of main flow mainly contains reverse osmosis and low temperature multiple-effect distillation.Reverse osmosis refer under high pressure by seawater by reverse osmosis membrane, allow fresh water by and strong brine retains, thus realize desalination.The pre-processing requirements of this technology to seawater is higher, and reverse osmosis membrane needs periodic cleaning and replacing, and this technology mainly consumes electric energy, and overall energy consumption is lower.And low temperature multiple-effect distillation refers to and utilizes low grade heat energy, in condition of negative pressure and 40-70 DEG C of temperature range, realize the technology that seawater repeatedly evaporates.Low temperature multiple-effect distillation operational load can from 40% to 110% change, and water generation ratio can not decline, and elasticity is larger; Pre-treatment is comparatively simple, and chemical consumption is lower; The handling safety of system is reliable, and this technology is particularly suitable for the occasion that Waste Heat Recovery utilizes.
The electricity generation system of multi-source complementation being combined with seawater desalination system is the desirable route solving an island water and electricity supply difficult problem.Publication number is that the Chinese utility model patent of CN202040021U discloses a kind of megawatt level wind power sea water desalinization system being applicable to island-grid, it comprises: wind-driven generator, diesel engine, clutch, synchronous generator, batteries and frequency converter, wherein, wind-driven generator is electrically connected with frequency converter, after frequency converter frequency conversion, be connected to island-grid; Diesel engine is connected with synchronous generator by clutch, and synchronous generator is electrically connected with frequency converter, after frequency converter frequency conversion, be connected to island-grid, and the capacity of frequency converter mates with the capacity single-candidate of wind-driven generator; Batteries is connected with island-grid by two-way inverter; Island-grid is electrically connected with desalinization load, priority user load and general user's load.
At present, based on wind-powered electricity generation, bavin is sent out is that auxiliary island wind/bavin complementary power generation system generally needs to realize peak regulation by energy-storage system (as storage battery), but its cost is very high, and efficiency is low.Desalinization is also the important peak regulation means of island wind/bavin complementary power generation system.Although hyperfiltration accounts for the share of about 60% in Global Seawater desalination market, in island desalinization occasion, the cost of electric energy is higher, and when there being Waste Heat Reuse, the cost of reverse osmosis is far above low temperature multiple-effect distillation.In addition, in counter-infiltration system, booster pump is higher to power supply stability requirement, powers be difficult to meet its requirement using wind-powered electricity generation as the island of main energy sources.
Summary of the invention
In view of this, be necessary for above-mentioned problem, provide a kind of with based on wind-powered electricity generation, bavin is sent out is the low temperature multiple-effect distillation seawater desalination system that matches of auxiliary island wind/bavin complementary power generation system and method.When wind-powered electricity generation is sufficient, by unnecessary wind-powered electricity generation heat source fluid, realize low temperature multiple-effect distillation sea water desalting; Wind-powered electricity generation realizes desalinization by diesel engine generator waste heat time not enough.
To achieve these goals, the present invention adopts following technical scheme:
A kind of island seawater desalination system, comprises supply of electric power control system, diesel residual heat recovery system, low temperature multiple-effect distillation system;
Described supply of electric power control system comprises wind-driven generator, diesel engine generator and master controller, and the wind driven generator controller to be connected with described wind-driven generator, the diesel generator controller be connected with diesel engine generator, the inverter be connected respectively with wind driven generator controller and diesel generator controller; Described master controller is connected with wind driven generator controller, diesel generator controller, inverter and user load;
Described diesel residual heat recovery system comprises jacket-cooling water outlet pipe and jacket-cooling water water inlet pipe, and the radiator to be connected respectively with jacket-cooling water water inlet pipe and outlet pipe and heat exchanger, be positioned at the temperature control three-way flow regulating valve of described jacket-cooling water outlet pipe and radiator and heat exchanger connecting place; Described heat exchanger is connected with low temperature multiple-effect distillation system;
Low temperature multiple-effect distillation system comprises low temperature multiple-effect distillation device and heating water tank, and described low temperature multiple-effect distillation device, heat exchanger and heating water tank join end to end successively; Described heating water tank is connected with master controller.
Preferably, thermal source water supply pump is provided with between described heating water tank and low temperature multiple-effect distillation device.
Preferably, described jacket-cooling water water inlet pipe is provided with circulating water pump.
A kind of island method for desalting seawater, uses above-mentioned island seawater desalination system, comprises the following steps:
1) wind-powered electricity generation that wind-driven generator produces is exported by wind driven generator controller, the bavin electricity that diesel engine generator produces is exported by diesel generator controller, wind-powered electricity generation or wind-powered electricity generation and bavin electricity changed into the electric power quality needed for user by inverter, flow to user load by master controller;
2) when wind power output is greater than user load demand, excrescent electric power passes in heating water tank by master controller, and for heating the heat source fluid of low temperature multiple-effect distillation system, heat source fluid enters low temperature multiple-effect distillation device and carries out desalinization after heating up and reaching set point; Master controller is by Signal transmissions to diesel generator controller simultaneously, closes diesel engine generator;
3) when wind power output equals user load demand, master controller cuts off the supply of electric power of heating water tank, and master controller is by Signal transmissions to diesel generator controller simultaneously, and close diesel engine generator, seawater desalination system quits work;
4) when wind power output is less than user load demand, master controller cuts off the supply of electric power of heating water tank, and sends a signal to diesel generator controller, makes diesel engine generator start generating, and according to user load demand modeling energy output; Jacket-cooling water is distributed by three-way flow regulating valve and enters radiator and heat exchanger, and heat source fluid enters heating water tank after reclaiming jacket-cooling water waste heat by heat exchanger, then enters low temperature multiple-effect distillation device and carry out desalinization.
Compared with prior art, island of the present invention seawater desalination system and method have following beneficial effect:
(1) island of the present invention seawater desalination system and method, with based on wind-powered electricity generation, bavin is sent out is that auxiliary island wind/bavin complementary power generation system matches, and adopts low temperature multiple-effect distillation Apparatus and method for desalinate seawater; When wind-powered electricity generation is sufficient, by unnecessary wind-powered electricity generation heat source fluid, realize low temperature multiple-effect distillation sea water desalting; Wind-powered electricity generation realizes desalinization by diesel engine generator waste heat time not enough; There is very strong adaptability to extremely unstable wind-powered electricity generation, and ensure can realize desalinization under different powering mode;
(2) unnecessary wind-powered electricity generation is used for desalinization, plays the effect of " peak clipping ", utilize electric energy unconditionally can be converted into heat energy and the large-scale load adaptability of low temperature multiple-effect distillation simultaneously, seawater desalination system Absorbable organic halogens is run;
(3) diesel engine generator is except generating electricity, and also the waste heat of its jacket-cooling water carries out desalinization, improves efficiency of energy utilization, reduces costs;
(4) heating water tank had both had the effect of heat source fluid, also can play the effect of expansion tank in closed-loop path, ensured the safety that pipeline runs.
Accompanying drawing explanation
Fig. 1 is the structural representation of seawater desalination system of the present invention.
In accompanying drawing, each Reference numeral is as follows:
1 wind-driven generator, 2 wind driven generator controllers, 3 inverters,
4 master controllers, 5 diesel generator controller, 6 diesel engine generators,
7 cooling fans, 8 temperature control three-way flow regulating valves, 9 heating water tank,
10 user loads, 11 thermal source water supply pumps, 12 low temperature multiple-effect distillation devices,
13 heat exchangers, 14 radiators, 15 circulating water pumps.
Embodiment
For a better understanding of the present invention, be described further below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1, a kind of island seawater desalination system, comprises supply of electric power control system, diesel residual heat recovery system and low temperature multiple-effect distillation system.Described supply of electric power control system comprises wind-driven generator 1, diesel engine generator 6 and master controller 4, and the wind driven generator controller 2 to be connected with described wind-driven generator 1, the diesel generator controller 5 be connected with described diesel engine generator 6, the inverter 3 be connected respectively with described wind driven generator controller 2 and described diesel generator controller 5; Described master controller 4 is connected with described wind driven generator controller 2, diesel generator controller 5, inverter 3 and user load 10.
Described wind driven generator controller 2 is for exporting wind-powered electricity generation, described diesel generator controller 5 is for exporting bavin electricity, described inverter 3 exports after wind-powered electricity generation and bavin electricity are changed into the electrical power demand of user load 10, and distributed by master controller 4 and enter user load 10 or user load 10 and heating water tank 9, complete the use of electric power.
Described diesel residual heat recovery system comprises jacket-cooling water outlet pipe and jacket-cooling water water inlet pipe, and the radiator 14 to be connected respectively with jacket-cooling water water inlet pipe and outlet pipe and heat exchanger 13, be positioned at the temperature control three-way flow regulating valve 8 of described jacket-cooling water outlet pipe and radiator 14 and heat exchanger 13 connecting place; Described heat exchanger 13 is connected with low temperature multiple-effect distillation system; Described low temperature multiple-effect distillation system comprises low temperature multiple-effect distillation device 12 and heating water tank 9, and described low temperature multiple-effect distillation device 12, heat exchanger 13 and heating water tank 9 join end to end successively; Described heating water tank 9 is connected with master controller 4.
The jacket-cooling water of described diesel engine generator 6 distributes the flow entering radiator 14 loop and heat exchanger 13 loop by temperature control three-way flow regulating valve 8.The cooling water entering radiator 14 loop is cooled by the cooling fan 7 of diesel engine generator 6 self; And the cooling water entering heat exchanger 13 loop is by the water cooling of seawater desalination system heat-source Cycles.Cooled cylinder of diesel engine jacket water re-injects into diesel engine generator 6 by circulating water pump 15.
The heat source fluid of described low temperature multiple-effect distillation system is through heat exchanger 13, after reclaiming the jacket-cooling water waste heat of diesel engine generator 6, through heating water tank 9, and squeeze into low temperature multiple-effect distillation device 12 by thermal source water supply pump 11, as the thermal source of low temperature multiple-effect distillation system, heating seawater evaporation and then generation fresh water supply user, the heat source fluid after cooling refills heat exchanger 13 and completes circulation.
Preferably, thermal source water supply pump 11 is provided with between described heating water tank 9 and low temperature multiple-effect distillation device 12.Preferably, described jacket-cooling water water inlet pipe is provided with circulating water pump 15.
Embodiment 2
Island method for desalting seawater in the present embodiment is applicable to the situation that wind power output is greater than electric energy needed for user load 10.A kind of island method for desalting seawater, use the island seawater desalination system described in embodiment 1, comprise the following steps: the wind-powered electricity generation that wind-driven generator 1 produces is exported by wind driven generator controller 2, the bavin electricity that diesel engine generator 6 produces is exported by diesel generator controller 5, and by inverter 3 by after wind-powered electricity generation or wind-powered electricity generation and the electric electric power quality changed into needed for user of bavin, flow to user load 10 and heating water tank 9 by master controller 4.
When wind power output is greater than user load 10 demand, excrescent electric power passes in heating water tank 9 by master controller 4, for heating the heat source fluid of low temperature multiple-effect distillation system, master controller 4 is by Signal transmissions to diesel generator controller 5 simultaneously, closes diesel engine generator 6.Now; diesel engine generator 6 is in stopped status; heat exchanger 13 is recyclable without waste heat; only use as flow pipe; heat up after the heat source fluid of low temperature multiple-effect distillation system enters heating water tank 9 and reach the requirement of low temperature multiple-effect distillation system, and squeeze into low temperature multiple-effect distillation device 12 by thermal source water supply pump 11 and carry out desalinization.Unnecessary wind-powered electricity generation is used for desalinization by the present embodiment, plays the effect of " peak clipping ", utilizes electric energy unconditionally can be converted into heat energy and the large-scale load adaptability of low temperature multiple-effect distillation simultaneously, and seawater desalination system Absorbable organic halogens runs.
Embodiment 3
Island method for desalting seawater in the present embodiment is applicable to the situation that wind power output equals electric energy needed for user load 10.A kind of island method for desalting seawater, use the island seawater desalination system described in embodiment 1, comprise the following steps: the wind-powered electricity generation that wind-driven generator 1 produces is exported by wind driven generator controller 2, the bavin electricity that diesel engine generator 6 produces is exported by diesel generator controller 5, and by inverter 3 by after wind-powered electricity generation or wind-powered electricity generation and the electric electric power quality changed into needed for user of bavin, flow to user load 10 by master controller 4.
When wind power output equals user load demand, master controller 4 cuts off the supply of electric power of heating water tank 9, and master controller 4 is by Signal transmissions to diesel generator controller 5 simultaneously, and close diesel engine generator 6, seawater desalination system quits work.
Embodiment 4
Island method for desalting seawater in the present embodiment is applicable to the situation that wind power output is less than or equal to the electric energy needed for user load 10.A kind of island method for desalting seawater, use the island seawater desalination system described in embodiment 1, comprise the following steps: the wind-powered electricity generation that wind-driven generator 1 produces is exported by wind driven generator controller 2, the bavin electricity that diesel engine generator 6 produces is exported by diesel generator controller 5, and by inverter 3 by after wind-powered electricity generation or wind-powered electricity generation and the electric electric power quality changed into needed for user of bavin, flow to user load 10 by controller 4.
When wind power output is less than or equal to user load 10 demand, master controller 4 cuts off the supply of electric power of heating water tank 9, and sends a signal to diesel generator controller 5, makes diesel engine generator 6 start generating, supplements the deficiency of wind-powered electricity generation, play the effect of filling out paddy.After now diesel engine generator 6 starts, jacket-cooling water waste heat distributes the flow entering radiator 14 loop and heat exchanger 13 loop by three-way flow regulating valve 8, after the heat source fluid of low temperature multiple-effect distillation system reclaims jacket-cooling water waste heat by heat exchanger 13, enter heating water tank 9, and squeeze into low temperature multiple-effect distillation device 12 by thermal source water supply pump 11 and carry out desalinization.The heating function of heating water tank 9 is closed in the present embodiment, only plays the effect of expansion tank in closed-loop path, ensures the safety that pipeline runs.Simultaneously when wind-powered electricity generation deficiency, make full use of the waste heat of diesel engine generator 6, also can carry out desalinization, improve efficiency of energy utilization.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (2)
1. an island seawater desalination system, is characterized in that, comprises supply of electric power control system, diesel residual heat recovery system, low temperature multiple-effect distillation system;
Described supply of electric power control system comprises wind-driven generator, diesel engine generator and master controller, and the wind driven generator controller to be connected with described wind-driven generator, the diesel generator controller be connected with diesel engine generator, the inverter be connected respectively with wind driven generator controller and diesel generator controller; Described master controller is connected with wind driven generator controller, diesel generator controller, inverter and user load;
Described diesel residual heat recovery system comprises jacket-cooling water outlet pipe and jacket-cooling water water inlet pipe, and the radiator to be connected respectively with jacket-cooling water water inlet pipe and outlet pipe and heat exchanger, be positioned at the temperature control three-way flow regulating valve of described jacket-cooling water outlet pipe and radiator and heat exchanger connecting place; Described heat exchanger is connected with low temperature multiple-effect distillation system;
Low temperature multiple-effect distillation system comprises low temperature multiple-effect distillation device and heating water tank, and described low temperature multiple-effect distillation device, heat exchanger and heating water tank join end to end successively; Described heating water tank is connected with master controller;
Thermal source water supply pump is provided with between described heating water tank and low temperature multiple-effect distillation device;
Described jacket-cooling water water inlet pipe is provided with circulating water pump.
2. an island method for desalting seawater, uses the island seawater desalination system described in claim 1, comprises the following steps:
1) wind-powered electricity generation that wind-driven generator produces is exported by wind driven generator controller, the bavin electricity that diesel engine generator produces is exported by diesel generator controller, wind-powered electricity generation or wind-powered electricity generation and bavin electricity changed into the electric power quality needed for user by inverter, flow to user load by master controller;
2) when wind power output is greater than user load demand, excrescent electric power passes in heating water tank by master controller, for heating the heat source fluid of low temperature multiple-effect distillation system, heat source fluid enters low temperature multiple-effect distillation device and carries out desalinization after heating up and reaching set point; Master controller is by Signal transmissions to diesel generator controller simultaneously, closes diesel engine generator;
3) when wind power output equals user load demand, master controller cuts off the supply of electric power of heating water tank, and master controller is by Signal transmissions to diesel generator controller simultaneously, and close diesel engine generator, seawater desalination system quits work;
4) when wind power output is less than user load demand, master controller cuts off the supply of electric power of heating water tank, and sends a signal to diesel generator controller, makes diesel engine generator start generating, and according to user load demand modeling energy output; Jacket-cooling water is distributed by three-way flow regulating valve and enters radiator and heat exchanger, and heat source fluid enters heating water tank after reclaiming jacket-cooling water waste heat by heat exchanger, then enters low temperature multiple-effect distillation device and carry out desalinization.
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| CN106830193A (en) * | 2017-02-08 | 2017-06-13 | 广州中国科学院先进技术研究所 | Island generates electricity and sea water desalting integral system and method |
| CN109595095B (en) * | 2019-01-28 | 2022-09-06 | 南通大学 | Marine diesel engine waste heat utilization and tail gas purification device |
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