CN103896350A - Island seawater desalting system and method - Google Patents
Island seawater desalting system and method Download PDFInfo
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- CN103896350A CN103896350A CN201410114722.XA CN201410114722A CN103896350A CN 103896350 A CN103896350 A CN 103896350A CN 201410114722 A CN201410114722 A CN 201410114722A CN 103896350 A CN103896350 A CN 103896350A
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- Y02A20/124—Water desalination
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- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
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Abstract
The invention discloses an island seawater desalting system and method. The island seawater desalting system comprises an electric power supply control system, a diesel engine waste heat recovery system and a low temperature multi-effect distillation system, wherein the electric power supply control system comprises a wind-driven generator and a controller thereof, a diesel generator and a controller thereof, an inverter and master controller; the diesel engine waste heat recovery system comprises a radiator, a heat exchanger and a temperature control three-way flow regulating valve; the low temperature multi-effect distillation system comprises a low temperature multi-effect distiller and a heating water tank. The island seawater desalting system and method disclosed by the invention have the advantages that an island wind/diesel hybrid power generating system focusing on wind generation and assisted by diesel generation is matched, and seawater is desalted through low temperature multi-effect distillation equipment and method; the seawater is desalted through residual wind power when wind power is sufficient, and the seawater is desalted through waste heat of a diesel generator when the wind power is insufficient; the desalting system and method are quite strong in adaptability to instable wind power, and are capable of desalting the seawater under different power supply modes.
Description
Technical field
The present invention relates to sea water desaltination field, relate in particular to a kind of island seawater desalination system and method.
Background technology
China shoreline is very long, and offshore islands spread all over the place.But most islands resource lack of water, fresh water total amount is limited; And electric power supply system difficulty is connected with continent electrical network 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 that solves island supply of electric power.Wind speed is randomness at nature, and exerting oneself of aerogenerator is directly proportional with the cube of wind speed, and therefore wind-powered electricity generation has strong unstable.In addition, wind-powered electricity generation is exerted oneself poor with workload demand correspondence.In China, the period of network load maximum just in seven annual Augusts, and now output of wind electric field is generally less, season, wind-powered electricity generation was exerted oneself poor with workload demand correspondence.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, and wind-powered electricity generation is exerted oneself poor with workload demand correspondence round the clock.Under current technical qualification, the unstable of wind-powered electricity generation need to solve by the power generation system of exploitation multi-source complementation, and wind/bavin complementary power generation system is to solve the important means of island for elctrical stability.
As the increment technique of increasing income of water resources, sea water desaltination has become the solution even important channel of global water resources crisis of freshwater supply to sea island.But sea water desaltination 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 refers under high pressure seawater by reverse osmosis membrane, allow fresh water by and strong brine is held back, thereby realize desalination.This technology is had relatively high expectations to the pre-treatment of seawater, and reverse osmosis membrane needs routine 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 utilize low grade heat energy, in condition of negative pressure and 40-70 ℃ of temperature range, realize the technology that seawater repeatedly evaporates.Low temperature multiple-effect distillation operational load can from 40% to 110% variation, and water generation ratio can not decline, and elasticity is larger; Pre-treatment is simpler, and chemical consumption is lower; The operational safety of system is reliable, and this technology is particularly suitable for the occasion that waste heat recovery is utilized.
It is the desirable approach that solves an island water and electricity supply difficult problem that the power generation system of multi-source complementation is combined with seawater desalination system.Publication number is that the Chinese utility model patent of CN202040021U discloses a kind of megawatt level wind power sea water desalinization system that is applicable to island-grid, it comprises: aerogenerator, diesel engine, clutch coupling, synchronous generator, secondary battery and frequency transformer, wherein, aerogenerator is electrically connected with frequency transformer, after frequency transformer frequency conversion, is connected to island-grid; Diesel engine is connected with synchronous generator by clutch coupling, and synchronous generator is electrically connected with frequency transformer, after frequency transformer frequency conversion, is connected to island-grid, and the capacity of frequency transformer mates with the capacity single-candidate of aerogenerator; Secondary battery is connected with island-grid by two-way invertor; Island-grid is loaded and is electrically connected with sea water desaltination load, priority user load and general user.
At present, send out take wind-powered electricity generation as main, bavin as auxiliary island wind/bavin complementary power generation system and generally need to realize peak regulation by accumulator system (as store battery), but its cost is very high, and efficiency is low.Sea water desaltination is also the important peak regulation means of island wind/bavin complementary power generation system.Although reverse osmosis method accounts for the share of 60% left and right in Global Seawater desalination market, in island sea water desaltination occasion, the cost of electric energy is higher, and in the situation that having used heat to utilize, the cost of reverse osmosis is far above low temperature multiple-effect distillation.In addition, in reverse osmosis system, topping-up pump is higher to power supply stability requirement, and the island power supply using wind-powered electricity generation as main energy sources is difficult to meet its requirement.
Summary of the invention
In view of this, be necessary for above-mentioned problem, provide a kind of with send out take wind-powered electricity generation as main, bavin the low temperature multiple-effect distillation seawater desalination system and the method that match as auxiliary island wind/bavin complementary power generation system.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; When wind-powered electricity generation is not enough, realize sea water desaltination by oil electric engine waste heat.
To achieve these goals, the present invention adopts following technical scheme:
A kind of island seawater desalination system, comprises supply of electric power Controlling System, diesel residual heat recovery system, low temperature multiple-effect distillation system;
Described supply of electric power Controlling System comprises aerogenerator, oil electric engine and master controller, and the wind driven generator controller being connected with described aerogenerator, the diesel generation machine controller being connected with oil electric engine, the invertor being connected respectively with wind driven generator controller and diesel generation machine controller; Described master controller is connected with wind driven generator controller, diesel generation machine controller, invertor and user load;
Described diesel residual heat recovery system comprises jacket-cooling water rising pipe and jacket-cooling water water inlet pipe, and the scatterer and the interchanger that are connected respectively with rising pipe with jacket-cooling water water inlet pipe, be positioned at the temperature control three-way flow regulating valve of described jacket-cooling water rising pipe and scatterer and interchanger connecting place; Described interchanger 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, interchanger and heating water tank join end to end successively; Described heating water tank is connected with master controller.
Preferably, between described heating water tank and low temperature multiple-effect distillation device, be provided with thermal source service pump.
Preferably, described jacket-cooling water water inlet pipe is provided with water circulating 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 aerogenerator produces is exported by wind driven generator controller, the bavin electricity that oil electric engine produces is exported by diesel generation machine controller, by invertor, wind-powered electricity generation or wind-powered electricity generation and bavin electricity are changed into the required electric energy quality of user, flow to user load by master controller;
2) exert oneself while being greater than user load demand when wind-powered electricity generation, master controller passes into excrescent electric power in heating water tank, and for heating the heat source fluid of low temperature multiple-effect distillation system, heat source fluid heats up and reaches after set(ting)value, enters low temperature multiple-effect distillation device and carries out sea water desaltination; Signal is transferred to diesel generation machine controller by master controller simultaneously, closes oil electric engine;
3) exert oneself while equaling user load demand when wind-powered electricity generation, master controller cuts off the supply of electric power of heating water tank, and signal is transferred to diesel generation machine controller by master controller simultaneously, closes oil electric engine, and seawater desalination system quits work;
4) exert oneself while being less than user load demand when wind-powered electricity generation, master controller cuts off the supply of electric power of heating water tank, and sends a signal to diesel generation machine controller, makes oil electric engine start generating, and according to user load demand control generated energy; Jacket-cooling water is distributed and is entered scatterer and interchanger by three-way flow regulating valve, and heat source fluid enters heating water tank after reclaiming jacket-cooling water waste heat by interchanger, then enters low temperature multiple-effect distillation device and carry out sea water desaltination.
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, matches with sending out take wind-powered electricity generation as main, bavin as auxiliary island wind/bavin complementary power generation system, adopts low temperature multiple-effect distillation Apparatus and method for to 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; When wind-powered electricity generation is not enough, realize sea water desaltination by oil electric engine waste heat; Extremely unsettled wind-powered electricity generation is had to very strong adaptability, and guarantee can realize sea water desaltination under different powering modes;
(2) by unnecessary wind-powered electricity generation for sea water desaltination, play the effect of " peak clipping ", utilize electric energy can unconditionally be converted into heat energy and the large-scale load adaptability of low temperature multiple-effect distillation simultaneously, make the seawater desalination system can steady running;
(3) oil electric engine is except generating electricity, and also the waste heat of its jacket-cooling water carries out sea water desaltination, 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 loop line, guaranteed the safety of pipeline operation.
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 aerogenerator, 2 wind driven generator controllers, 3 invertors,
4 master controllers, 5 diesel generation machine controllers, 6 oil electric engines,
7 cooling fans, 8 temperature control three-way flow regulating valves, 9 heating water tank,
10 user loads, 11 thermal source service pumps, 12 low temperature multiple-effect distillation devices,
13 interchanger, 14 scatterers, 15 water circulating pumps.
Embodiment
For a better understanding of the present invention, be described further below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of island seawater desalination system, comprises supply of electric power Controlling System, diesel residual heat recovery system and low temperature multiple-effect distillation system.Described supply of electric power Controlling System comprises aerogenerator 1, oil electric engine 6 and master controller 4, and the wind driven generator controller 2 being connected with described aerogenerator 1, the diesel generation machine controller 5 being connected with described oil electric engine 6, the invertor 3 being connected respectively with described wind driven generator controller 2 and described diesel generation machine controller 5; Described master controller 4 is connected with described wind driven generator controller 2, diesel generation machine controller 5, invertor 3 and user load 10.
Described wind driven generator controller 2 is for exporting wind-powered electricity generation, described diesel generation machine controller 5 is for exporting bavin electricity, the electric power that wind-powered electricity generation and bavin electricity are changed into user load 10 by described invertor 3 requires rear output, and distribute and enter user load 10 or user load 10 and heating water tank 9 by master controller 4, complete the use of electric power.
Described diesel residual heat recovery system comprises jacket-cooling water rising pipe and jacket-cooling water water inlet pipe, and the scatterer 14 and the interchanger 13 that are connected respectively with rising pipe with jacket-cooling water water inlet pipe, be positioned at the temperature control three-way flow regulating valve 8 of described jacket-cooling water rising pipe and scatterer 14 and interchanger 13 connecting places; Described interchanger 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, interchanger 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 oil electric engine 6 distributes by temperature control three-way flow regulating valve 8 flow that enters scatterer 14 loops and interchanger 13 loops.The water coolant that enters scatterer 14 loops is cooling by the cooling fan 7 of oil electric engine 6 self; And the water coolant that enters interchanger 13 loops is by the water cooling of seawater desalination system heat-source Cycles.Cooled cylinder of diesel engine jacket water re-injects into oil electric engine 6 by water circulating pump 15.
The heat source fluid of described low temperature multiple-effect distillation system is through interchanger 13, reclaim after the jacket-cooling water waste heat of oil electric engine 6, through heating water tank 9, and squeeze into low temperature multiple-effect distillation device 12 by thermal source service pump 11, as the thermal source of low temperature multiple-effect distillation system, heating seawater evaporation and then generation fresh water are supplied with user, and the heat source fluid after cooling refills interchanger 13 and completes circulation.
Preferably, between described heating water tank 9 and low temperature multiple-effect distillation device 12, be provided with thermal source service pump 11.Preferably, described jacket-cooling water water inlet pipe is provided with water circulating pump 15.
Island method for desalting seawater in the present embodiment is applicable to wind-powered electricity generation and exerts oneself and be greater than the situation of user load 10 required electric energy.A kind of island method for desalting seawater, island seawater desalination system described in use embodiment 1, comprise the following steps: the wind-powered electricity generation that aerogenerator 1 produces is exported by wind driven generator controller 2, the bavin electricity that oil electric engine 6 produces is exported by diesel generation machine controller 5, and by invertor 3, wind-powered electricity generation or wind-powered electricity generation and bavin electricity are changed into after the required electric energy quality of user, flow to user load 10 and heating water tank 9 by master controller 4.
When wind-powered electricity generation is exerted oneself while being greater than user load 10 demand, master controller 4 passes into excrescent electric power in heating water tank 9, for heating the heat source fluid of low temperature multiple-effect distillation system, signal is transferred to diesel generation machine controller 5 by master controller 4 simultaneously, closes oil electric engine 6.Now; oil electric engine 6 is in stopped status; interchanger 13 is recyclable without waste heat; only use as circulation pipeline; the heat source fluid of low temperature multiple-effect distillation system enters the rear intensification of heating water tank 9 and reaches the requirement of low temperature multiple-effect distillation system, and squeezes into low temperature multiple-effect distillation device 12 by thermal source service pump 11 and carry out sea water desaltination.The present embodiment for sea water desaltination, plays the effect of " peak clipping " by unnecessary wind-powered electricity generation, utilizes electric energy can unconditionally be converted into heat energy and the large-scale load adaptability of low temperature multiple-effect distillation simultaneously, and seawater desalination system can steady running.
Island method for desalting seawater in the present embodiment is applicable to wind-powered electricity generation and exerts oneself and equal the situation of user load 10 required electric energy.A kind of island method for desalting seawater, island seawater desalination system described in use embodiment 1, comprise the following steps: the wind-powered electricity generation that aerogenerator 1 produces is exported by wind driven generator controller 2, the bavin electricity that oil electric engine 6 produces is exported by diesel generation machine controller 5, and by invertor 3, wind-powered electricity generation or wind-powered electricity generation and bavin electricity are changed into after the required electric energy quality of user, flow to user load 10 by master controller 4.
Exert oneself while equaling user load demand when wind-powered electricity generation, master controller 4 cuts off the supply of electric power of heating water tank 9, and signal is transferred to diesel generation machine controller 5 by master controller 4 simultaneously, closes oil electric engine 6, and seawater desalination system quits work.
Island method for desalting seawater in the present embodiment is applicable to wind-powered electricity generation and exerts oneself and be less than or equal to the situation of the required electric energy of user load 10.A kind of island method for desalting seawater, island seawater desalination system described in use embodiment 1, comprise the following steps: the wind-powered electricity generation that aerogenerator 1 produces is exported by wind driven generator controller 2, the bavin electricity that oil electric engine 6 produces is exported by diesel generation machine controller 5, and by invertor 3, wind-powered electricity generation or wind-powered electricity generation and bavin electricity are changed into after the required electric energy quality of user, flow to user load 10 by controller 4.
Exert oneself while being less than or equal to user load 10 demand when wind-powered electricity generation, master controller 4 cuts off the supply of electric power of heating water tank 9, and sends a signal to diesel generation machine controller 5, makes oil electric engine 6 start generating, supplements the deficiency of wind-powered electricity generation, plays the effect of filling out paddy.After now oil electric engine 6 starts, jacket-cooling water waste heat distributes by three-way flow regulating valve 8 flow that enters scatterer 14 loops and interchanger 13 loops, the heat source fluid of low temperature multiple-effect distillation system reclaims after jacket-cooling water waste heat by interchanger 13, enter heating water tank 9, and squeeze into low temperature multiple-effect distillation device 12 by thermal source service pump 11 and carry out sea water desaltination.The heating function of heating water tank 9 is closed in the present embodiment, only plays the effect of expansion tank in loop line, guarantees the safety of pipeline operation.The in the situation that of wind-powered electricity generation deficiency, make full use of the waste heat of oil electric engine 6 simultaneously, also can carry out sea water desaltination, improve efficiency of energy utilization.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore 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 domain of patent of the present invention should be as the criterion with claims.
Claims (4)
1. an island seawater desalination system, is characterized in that, comprises supply of electric power Controlling System, diesel residual heat recovery system, low temperature multiple-effect distillation system;
Described supply of electric power Controlling System comprises aerogenerator, oil electric engine and master controller, and the wind driven generator controller being connected with described aerogenerator, the diesel generation machine controller being connected with oil electric engine, the invertor being connected respectively with wind driven generator controller and diesel generation machine controller; Described master controller is connected with wind driven generator controller, diesel generation machine controller, invertor and user load;
Described diesel residual heat recovery system comprises jacket-cooling water rising pipe and jacket-cooling water water inlet pipe, and the scatterer and the interchanger that are connected respectively with rising pipe with jacket-cooling water water inlet pipe, be positioned at the temperature control three-way flow regulating valve of described jacket-cooling water rising pipe and scatterer and interchanger connecting place; Described interchanger 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, interchanger and heating water tank join end to end successively; Described heating water tank is connected with master controller.
2. island according to claim 1 seawater desalination system, is characterized in that, between described heating water tank and low temperature multiple-effect distillation device, is provided with thermal source service pump.
3. island according to claim 1 seawater desalination system, is characterized in that, described jacket-cooling water water inlet pipe is provided with water circulating pump.
4. an island method for desalting seawater, right to use requires the island seawater desalination system described in 1, comprises the following steps:
1) wind-powered electricity generation that aerogenerator produces is exported by wind driven generator controller, the bavin electricity that oil electric engine produces is exported by diesel generation machine controller, by invertor, wind-powered electricity generation or wind-powered electricity generation and bavin electricity are changed into the required electric energy quality of user, flow to user load by master controller;
2) exert oneself while being greater than user load demand when wind-powered electricity generation, master controller passes into excrescent electric power in heating water tank, and for heating the heat source fluid of low temperature multiple-effect distillation system, heat source fluid heats up and reaches after set(ting)value, enters low temperature multiple-effect distillation device and carries out sea water desaltination; Signal is transferred to diesel generation machine controller by master controller simultaneously, closes oil electric engine;
3) exert oneself while equaling user load demand when wind-powered electricity generation, master controller cuts off the supply of electric power of heating water tank, and signal is transferred to diesel generation machine controller by master controller simultaneously, closes oil electric engine, and seawater desalination system quits work;
4) exert oneself while being less than user load demand when wind-powered electricity generation, master controller cuts off the supply of electric power of heating water tank, and sends a signal to diesel generation machine controller, makes oil electric engine start generating, and according to user load demand control generated energy; Jacket-cooling water is distributed and is entered scatterer and interchanger by three-way flow regulating valve, and heat source fluid enters heating water tank after reclaiming jacket-cooling water waste heat by interchanger, then enters low temperature multiple-effect distillation device and carry out sea water desaltination.
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| CN109595095A (en) * | 2019-01-28 | 2019-04-09 | 南通大学 | A kind of marine vehicle diesel residual heat utilizes and exhaust gas cleaner |
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