CN105540968A - Integrated apparatus for seawater desalination and salt production - Google Patents
Integrated apparatus for seawater desalination and salt production Download PDFInfo
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- CN105540968A CN105540968A CN201510934513.4A CN201510934513A CN105540968A CN 105540968 A CN105540968 A CN 105540968A CN 201510934513 A CN201510934513 A CN 201510934513A CN 105540968 A CN105540968 A CN 105540968A
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- seawater
- sea water
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- salt
- high pressure
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- 239000013535 sea water Substances 0.000 title claims abstract description 138
- 150000003839 salts Chemical class 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000010612 desalination reaction Methods 0.000 title abstract description 6
- 239000012528 membrane Substances 0.000 claims abstract description 35
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 33
- 238000002425 crystallisation Methods 0.000 claims abstract description 27
- 230000008025 crystallization Effects 0.000 claims abstract description 27
- 238000011084 recovery Methods 0.000 claims abstract description 26
- 230000000295 complement effect Effects 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000010349 pulsation Effects 0.000 claims description 41
- 238000007599 discharging Methods 0.000 claims description 20
- CUZMQPZYCDIHQL-VCTVXEGHSA-L calcium;(2s)-1-[(2s)-3-[(2r)-2-(cyclohexanecarbonylamino)propanoyl]sulfanyl-2-methylpropanoyl]pyrrolidine-2-carboxylate Chemical compound [Ca+2].N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1.N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1 CUZMQPZYCDIHQL-VCTVXEGHSA-L 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 10
- 239000013505 freshwater Substances 0.000 abstract description 18
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 6
- 235000002639 sodium chloride Nutrition 0.000 description 50
- 238000000034 method Methods 0.000 description 18
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 13
- 239000011780 sodium chloride Substances 0.000 description 13
- 230000008901 benefit Effects 0.000 description 9
- 239000002775 capsule Substances 0.000 description 8
- 230000036461 convulsion Effects 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 7
- 238000005507 spraying Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000000087 stabilizing effect Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 238000005381 potential energy Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002354 daily effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000012858 resilient material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 235000019600 saltiness Nutrition 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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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
- Y02A20/131—Reverse-osmosis
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
Abstract
The invention discloses an integrated apparatus for seawater desalination and salt production. The apparatus comprises a water-feeding pump, a plunger type supercharging apparatus, a pulsating energy exchanger, an air blower, a heater, a salt producing apparatus by spray crystallization, a reverse osmosis membrane component, a complementary energy recovery device, and a booster pump; a water inlet end of the water-feeding pump communicates with seawater, a water outlet end is divided into two paths, wherein one path is used for producing stable high-pressure seawater through the plunger type supercharging apparatus and the pulsating energy exchanger, and the other patch is used for producing fresh water through the complementary energy recovery device and the booster pump, and the reverse osmosis membrane component with the merged high-pressure seawater which is discharged from the pulsating energy exchanger; high pressure dense seawater discharged from the reverse osmosis membrane component passes through the complementary energy recovery device for producing low-pressure dense seawater, and the low-pressure dense seawater enters salt producing apparatus by spray crystallization; stable air-flow discharged from the air blower passes through the heater and the pulsating energy exchanger, pulsated thermal current is generated and enters the salt producing apparatus by spray crystallization, and the low pressure dense seawater and the pulsated thermal current are mixed in the salt producing apparatus by spray crystallization for producing salt by evaporation and crystallization.
Description
The application is on 01 13rd, 2015 applying date of China, and application number is 2015100150200, the divisional application that name is called " method of sea water desaltination and salt manufacturing integration and device ".
Technical field
The present invention relates to a kind of water treatment device, a kind of method of particularly sea water desaltination and salt manufacturing and device.
Background technology
Scarcity of fresh water resources, energy scarcity and ecocrisis are the three large problems that China faces at present.Seawater is carried out desalination and salt manufacturing comprehensive utilization, effectively can alleviate Freshwater resources problem in short supply, concentrated seawater can be avoided directly to discharge, but also be conducive to reducing energy consumption and comprehensive cost.However, the energy consumption and the cost that carry out sea water desaltination and salt manufacturing comprehensive utilization are at present still very high, seriously constrain industrialized development.
Phase the 32nd in January calendar year 2001 " agricultural mechanical journal " the 1st volume " spraying dry of pulse pneumatic " document is recorded, spraying dry under high temperature, HF oscillation air-flow improves more than 25 times than the vaporator rate of conventionally spray-dried, in addition, pulsation evaporation drying also has the advantages such as energy-conservation, equipment cost is low, environmental protect pollution situation, therefore, in order to improve the efficiency of salt manufacturing, being sprayed in the hot gas flow of pulsation by the concentrated seawater after desalination, is the advanced salt making technology that current sexual valence is higher.
Although also disclose " a kind of pulse combustion device " in above-mentioned " spraying dry of pulse pneumatic ", this device can produce the hot gas flow of pulsation, and this apparatus structure is complicated, and unstable properties, can not be applied in sea water desaltination salt manufacturing.The pulsation hot gas flow production method of current sea water desaltination, salt manufacturing is: produce stable airflow by fan, airflow is through adding the stable hot gas flow of thermosetting, stable hot gas flow produces the hot gas flow of pulsation again by jerk pump, the mode of production of the hot gas flow of this pulsation needs to use jerk pump, the power consumption of jerk pump is higher, causes the energy consumption of system to remain high.
In addition, current sea water desaltination mainly adopts reverse osmosis membrane technology, reverse osmosis membrane technology needs the high pressure sea water of 5.0MPa ~ 6.0MPa, seawater booster apparatus ideal is at present plunger tpe supercharging device, plunger tpe supercharging device is primarily of piston, piston rod, pumping cylinder, pump valve, the formations such as crank connecting link, principle of work is that piston moves reciprocatingly under external force, change the volume in working chamber and pressure thus, negative pressure is formed in working chamber, then in storage tank, liquid enters in working chamber through suction valve, when the motion of piston reciprocation opens and closes suction, when extruding valve, liquid in working chamber is squeezed, pressure increase, the object reaching conveying liquid is discharged by outlet valve.Because plunger tpe supercharging device piston is in moving process, its speed constantly changes, the hydraulic pressure of plunger tpe supercharging device water outlet is caused to be pulsation, and the work-ing life of the high pressure water meeting serious curtailment reverse osmosis membrane of pulsation and the quality affecting freshwater product, so directly reverse osmosis membrane assembly can not be entered.Therefore, need after the water outlet of current plunger tpe supercharging device to increase stable-pressure device, to ensure the stable water pressure reached in reverse osmosis membrane.Stable-pressure device conventional at present has reducing valve, surge tank and energy storage etc., and these voltage stabilizing processes will consume a lot of energy, and moreover, stable-pressure device also causes system architecture complicated, and equipment investment cost and floor space increase.
In sum, in current sea water desaltination and salt making equipment, there is the stable-pressure device that is used for stability column plug supercharging device water outlet hydraulic pressure and the jerk pump for generation of pulsation hot gas flow, cause current sea water desaltination and salt-making process energy expenditure is large, equipment investment is many and cost is high.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of Energy harvesting and transformation efficiency high, running cost reduces, and has the sea water desaltination of considerable economic benefit, social benefit and using value and the method for salt manufacturing integration and device.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of method of sea water desaltination and salt manufacturing integration, the method is: the high pressure sea water being converted into pulsation from the seawater of large marine extraction through plunger tpe supercharging device, high pressure sea water and the stable hot gas flow of pulsation realize energy exchange in pulsating energy switch, be converted into stable high pressure sea water and the hot gas flow of pulsation, high pressure sea water after voltage stabilizing through reverse osmosis membrane assembly preparing fresh, from reverse osmosis membrane assembly discharge high-pressure thick sea water spray mist to pulsation hot gas flow evaporative crystallization salt manufacturing.
As the further improvement to aforesaid method, described from reverse osmosis membrane assembly discharge high-pressure thick seawater with complementary energy recovery device, realize energy exchange from the seawater of large marine extraction, the sub-high pressure seawater of discharging from complementary energy recovery device is after high-pressure pump supercharging, conflux with the high pressure sea water of discharging from pulsating energy switch and enter reverse osmosis membrane assembly, evaporative crystallization salt manufacturing in the low-press thick sea water spray mist of discharging from complementary energy recovery device to the hot gas flow of pulsation.
Adopt a device for aforesaid method sea water desaltination and salt manufacturing, this device comprises service pump, plunger tpe supercharging device, pulsating energy interchanger, fan, well heater, spray crystallization salt making apparatus, reverse osmosis membrane assembly, complementary energy recovery device and topping-up pump, the feed-water end of described service pump is communicated with seawater marine greatly, two-way is divided in the water side of described service pump, wherein a road is successively through plunger tpe supercharging device, pulsating energy interchanger produces stable high pressure sea water, an other road is successively through complementary energy recovery device, topping-up pump, converge with the high pressure sea water of discharging from pulsating energy interchanger and enter reverse osmosis membrane assembly preparing fresh, the high-pressure thick seawater of discharging from described reverse osmosis membrane assembly produces low-press thick seawater through complementary energy recovery device, low-press thick seawater enters in described spray crystallization salt making apparatus, the steady air flow of discharging from described fan is successively through well heater, the hot gas flow that pulsating energy interchanger produces pulsation enters in described spray crystallization salt making apparatus, the hot gas flow of described low-press thick seawater and pulsation mixes evaporative crystallization salt manufacturing in spray crystallization salt making apparatus.
Described pulsating energy interchanger comprises mutually isolated thermal current passway and high pressure sea water passage, netted support set is provided with in described thermal current passway, be provided with in described support set be made up of resilient material change pressure capsule, described in change pressure capsule be provided with the water-in with described high pressure sea water channel connection.
Described pulsating energy interchanger comprises mutually isolated thermal current passway and high pressure sea water passage, described thermal current passway is positioned at directly over described high pressure sea water passage, the downside of described thermal current passway is provided with piston mouth, the upside of described high pressure sea water passage is provided with changes pressure chamber, described in change in pressure chamber the piston valve being provided with and can stretching in described piston mouth.
Described piston mouth place is provided with elastic sealing membrane.
Described piston valve is provided with balancing weight.
The invention has the beneficial effects as follows: the pulsation energy of the pulsation high pressure sea water that plunger tpe supercharging device produces is delivered to stable hot gas flow by pulsating energy switch by the present invention, form the hot gas flow of stable high pressure sea water and pulsation, eliminate the stable-pressure device in current sea water desaltination and the jerk pump in salt making equipment, simplify the structure of system, decrease input and the floor space of equipment, save the energy, the pulsating energy of high pressure sea water is directly delivered to the hot gas flow forming pulsation in stable hot gas flow, pulsating energy switch both instead of stable-pressure device, the hot gas flow of pulsation can be produced again and not need extra consumed energy, original harmful pulsating energy is fully utilized, reach bi-directional energy-saving, the object reduced costs, comprehensive energy consumption and cost are significantly reduced, there is considerable economic benefit, social benefit and using value.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is apparatus structure schematic diagram of the present invention;
Fig. 2 is the first embodiment structural representation of pulsating energy interchanger;
Fig. 3 is the second embodiment structural representation of pulsating energy interchanger.
Embodiment
A kind of method of sea water desaltination and salt manufacturing integration, the method is: the high pressure sea water being converted into pulsation from the seawater of large marine extraction through plunger tpe supercharging device, high pressure sea water and the stable hot gas flow of pulsation realize energy exchange in pulsating energy switch, be converted into stable high pressure sea water and the hot gas flow of pulsation, high pressure sea water after voltage stabilizing through reverse osmosis membrane assembly preparing fresh, from reverse osmosis membrane assembly discharge high-pressure thick sea water spray mist to pulsation hot gas flow evaporative crystallization salt manufacturing.
As a further improvement on the present invention, described from reverse osmosis membrane assembly discharge high-pressure thick seawater with complementary energy recovery device, realize energy exchange from the seawater of large marine extraction, the sub-high pressure seawater of discharging from complementary energy recovery device is after high-pressure pump supercharging, conflux with the high pressure sea water of discharging from pulsating energy switch and enter reverse osmosis membrane assembly, evaporative crystallization salt manufacturing in the low-press thick sea water spray mist of discharging from complementary energy recovery device to the hot gas flow of pulsation.
With reference to Fig. 1, adopt a device for aforesaid method sea water desaltination and salt manufacturing, comprise service pump 12, plunger tpe supercharging device 15, pulsating energy interchanger 3, fan 1, well heater 2, spray crystallization salt making apparatus 4, reverse osmosis membrane assembly 7, complementary energy recovery device 8 and topping-up pump 9.The feed-water end of described service pump 12 is communicated with the seawater in sea 14, two-way is divided in the water side of described service pump 12, wherein a road is successively through plunger tpe supercharging device 15, pulsating energy interchanger 3 produces stable high pressure sea water, an other road is successively through complementary energy recovery device 8, topping-up pump 9 converges with the high pressure sea water of discharging from pulsating energy interchanger 3 and enters reverse osmosis membrane assembly 7 preparing fresh, the fresh water produced flows in fresh-water tank 6 and stores, the high-pressure thick seawater of discharging from described reverse osmosis membrane assembly 7 produces low-press thick seawater through complementary energy recovery device 8, low-press thick sea is accessed in described spray crystallization salt making apparatus 4 by pipeline, the steady air flow of discharging from described fan 1 is successively through well heater 2, the hot gas flow that pulsating energy interchanger 3 produces pulsation enters in described spray crystallization salt making apparatus 4, the hot gas flow of described low-press thick seawater and pulsation mixes evaporative crystallization salt manufacturing in spray crystallization salt making apparatus 4.
The power of described plunger tpe supercharging device 15, service pump 12, topping-up pump 9 can come from electric motor, electric motor draws working power from external power grid, also can be the technical scheme disclosed in the patent document of 201010581552.8 as the patent No., utilize tidal energy and water turbine to produce power, drive plunger tpe supercharging device 15, service pump 12, topping-up pump 9 to work.
In order to securing system equipment, the water outlet of described service pump 12 can arrange sea water preprocessing device 11, and arranges first throttle valve 10 and second throttle 13 in the two-way output channel of sea water preprocessing device 11.Sea water preprocessing device 11 is primarily of compositions such as multimedium filter, char filter, cartridge filters.The effect of multimedium filter is silt, impurity, suspended substance in filtering seawater, reduces the SDI(pollution index density of seawater) value.Char filter has absorption and filters dual function, can chemical organic compounds, heavy metal, colourity, peculiar smell etc. in filtering seawater, improves the mouthfeel of obtained fresh water.Cartridge filter can tackle the object being greater than 5 microns, extends the work-ing life of reverse osmosis membrane assembly.
The hydraulic pressure of stable high pressure sea water of discharging from pulsating energy interchanger 3 is 5.0MPa ~ 6.0MPa, the fresh water hydraulic pressure of discharging from reverse osmosis membrane assembly 7 is 0.15MPa, concentrated seawater hydraulic pressure is 4.8MPa ~ 5.8MPa, high-pressure thick seawater and low pressure seawater are after complementary energy recovery device 8 exchange energy, the sub-high pressure seawater hydraulic pressure of discharging from complementary energy recovery device 8 is 4.0MPa ~ 4.5MPa, 5.0MPa ~ 6.0MPa is pressurized to by topping-up pump 9, conflux with the high pressure sea water of discharging from pulsating energy interchanger 3, enter preparing fresh in reverse osmosis membrane assembly 7, the low-press thick seawater hydraulic pressure of discharging from complementary energy recovery device 8 is 0.45MPa ~ 0.55MPa, the hydraulic pressure of 0.45MPa ~ 0.55MPa low-press thick seawater enough ensures the effect of spraying.
Described plunger tpe supercharging device 15 is also called plunger type metering pump, as the SZ-B-12.5/20 type plunger type metering pump that Shanghai produces along sub-Machinery Manufacturing Co., Ltd., peak pressure can reach 20MPa, and stroke frequency is 58 ~ 116 beats/min, can meet the requirement of seawater boost and generation pulsation hot gas flow.
The structure of described complementary energy recovery device 8 is identical with the complementary energy recovery device adopted in current seawater desalination system with principle of work, as publication number water energy-recuperation system disclosed in the patent document of CN102974220B, the PX Series Pressure interchanger etc. that Qingdao Bonded Zone Jia Ming International Trading Company Ltd produces all can use.Current complementary energy recovery device energy recovery rate can reach more than 90%, greatly can reduce the water consumption processed of reverse osmosis seawater desalting, reduces water producing cost.
Described spray crystallization evaporation unit 4 is identical with principle of work with the spray crystallization evaporation unit structure of current sea water desaltination and saltern, primarily of spraying gun, spray-drying chamber, the compositions such as cooling room, the hot gas flow of pulsation enters kiln, low-press thick seawater is under the pressure of self, be atomized by spraying gun, spray in kiln with the form of small droplets, mix with the hot gas flow of pulsation, high temperature is formed in spraying dry chamber interior, HF oscillation state, hot gas flow fully mixes with concentrated seawater, heat interchanging area increases, thus the object of rapid evaporation drying can be reached in a short period of time.
In order to make the high pressure sea water stability more entering reverse osmosis membrane assembly 7; connecting tube between pulsating energy interchanger 3 and reverse osmosis membrane assembly 7 can install potentiostat 5 additional; potentiostat 5 is bellows structure conventional at present; in capsule, be filled with the gas of certain pressure and be placed in high pressure water circuit; when sea pressure increases; the pressure energy of seawater is converted into the potential energy of gas; when sea pressure reduces; the potential energy of gas is converted into again the hydraulic pressure of seawater, thus reaches the effect of protection reverse osmosis membrane assembly 7 and raising water quality.It should be noted that, main stable-pressure device in current sea water desaltination and salt making system replace by the pulsating energy interchanger 3 of the application, in the sea water desaltination of current employing stable-pressure device and jerk pump and salt making system, also there is the secondary pressure stabilizing mechanism playing secondary pressure effect that voltage stabilizing amplitude is less, the potentiostat 5 of the application is equivalent to the secondary pressure stabilizing mechanism in current sea water desaltination and salt making system.
Potentiostat conventional at present also has reducing valve, surge tank and energy storage etc., and wherein surge tank is similar to the principle of energy storage, is the compressible expansion characteristics utilizing air.Reducing valve, for reducing the pressure of certain part in hydraulic efficiency system, when pressure is through there being the gap aperture of larger resistance, consumes the pressure energy of part seawater, making pressure drop.Because the large I in gap in pressure maintaining valve regulates voluntarily according to required pressure size, the stable of top hole pressure thus can be kept.Surge tank, mainly based on the compressible of air and expansion characteristics, can be divided into direct contact type and diaphragm type two class by structure by surge tank.Energy storage is similar with diaphragm type surge tank, namely when system capacity is had more than needed, the pressure energy of hydraulic efficiency oil is converted to potential energy storage, potential energy converting and energy is become again the pressure energy of hydraulic efficiency oil to discharge when system needs.
Described pulsating energy interchanger 3 is energy exchanger, can select energy exchanger of the prior art to realize.The invention provides the pulsating energy exchanger arrangement that two kinds of structures are simple, satisfactory for result.
The first pulsating energy interchanger is that elasticity changes pressure bag type, concrete structure is see Fig. 2, described pulsating energy interchanger 3 comprises mutually isolated thermal current passway 30 and high pressure sea water passage 31, the inlet mouth of thermal current passway 30 connects the exhaust side of well heater 2, the exhaust termination spray crystallization evaporation unit 4 of thermal current passway 30, the water-in of high pressure sea water passage 31 connects the water side of plunger tpe supercharging device 15, and the water outlet of high pressure sea water passage 31 connects reverse osmosis membrane assembly 7.Be provided with netted support set 32 in described thermal current passway 30, be provided with in described support set 32 by resilient material make change pressure capsule 33, described in change pressure capsule 33 be provided with the water-in 34 be communicated with described high pressure sea water passage 31.When hydraulic pressure increases, the elastic pressure capsule 33 that changes outwards expands, and volume increases, and stops continuing to increase when increasing to equal with support set 32 volume, when hydraulic pressure reduces, change pressure capsule 33 elastic contribution volume to restore to the original state, elasticity changes the volume change of pressure capsule 33, causes the size variation of gas channel in thermal current passway 30, and hot gas flow flow is constant, so that the sometimes fast and sometimes slow generation pulsation effect of hot gas flow, namely gives hot gas flow the high pressure sea water pulsating energy transmission of pulsation, forms the hot gas flow of pulsation.
The second pulsating energy interchanger is Weight type, concrete structure is see Fig. 3, described pulsating energy interchanger 3 comprises mutually isolated thermal current passway 30 and high pressure sea water passage 31, and thermal current passway 30 is identical with first kind of way with high pressure sea water passage 31 mode of connection in systems in which.Described thermal current passway 30 is positioned at directly over described high pressure sea water passage 31, the downside of described thermal current passway 30 is provided with piston mouth 35, the upside of described high pressure sea water passage 31 is provided with changes pressure chamber 36, describedly change in pressure chamber 36 piston valve 37 being provided with and can stretching in described piston mouth 35, described piston valve 37 is provided with balancing weight 39.
When hydraulic pressure increases, the pressure energy of seawater is converted into the gravitional force of piston valve 37, piston valve 37 vertically raises, stretch in thermal current passway 30 from changing pressure chamber 36, gas channel in thermal current passway 30 is diminished, but after hydraulic pressure reduces, piston valve 37 action of gravity falls naturally, the gas channel in thermal current passway 30 is made to become large, piston valve 37 moves up and down, the sometimes fast and sometimes slow generation pulsation effect of hot gas flow, namely gives hot gas flow the high pressure sea water pulsating energy transmission of pulsation, forms the hot gas flow of pulsation.
In order to play sealing function, described piston mouth 35 place is provided with elastic sealing membrane 38, and piston valve 37 moves upward, jack-up sealing membrane 38, not only can reach the object changing gas channel size in thermal current passway 30, also can play sealing function.
The pulsating energy of high pressure sea water of the present invention is directly delivered to the hot gas flow forming pulsation in stable hot gas flow, pulsating energy switch both instead of stable-pressure device, the hot gas flow of pulsation can be produced again and not need extra consumed energy, original harmful pulsating energy is fully utilized, reach bi-directional energy-saving, the object reduced costs, eliminate the stable-pressure device in current sea water desaltination and the jerk pump in salt making equipment, simplify the structure of system, decrease input and the floor space of equipment, save the energy, comprehensive energy consumption and cost are significantly reduced.
With fresh-water recovery rate during sea water desaltination be 40% and energy consumption cost for 50%, the price of fresh water is 6 yuan/t, and the production cost of sea salt is 130 yuan/t that is 0.13 yuan/kilogram, and the production cost of rock salt is 0.24 yuan of/kilogram of calculating, and comprehensive benefit analysis of the present invention is as follows:
The mean salt degree of seawater is 3.5%, and namely in 1t seawater, saltiness is 35 kilograms.Adopt regular seawater desalination method, produce 1t fresh water, need 2.5t seawater, and in 2.5t seawater containing sea salt be: 2.5 × 35=87.5 kilogram, producing the difference profit that 87.5 kilograms of sea salt compare production 87.5 kilograms of rock salts is: 87.5 × (0.24-0.13)=9.625 yuan, and Here it is produces large economic advantages of sea salt.
When utilizing seawater to produce sea salt, seawater saturation concentration is 26%, calculates according to this concentration, and when 1t seawater is evaporated to 135 kilograms, seawater reaches capacity and starts have sea salt to be precipitated, and needs the fresh water evaporated to be 865 kilograms.Adopt method of the present invention and device, 1t seawater, after sea water desaltination, has the fresh water of 400 kilograms to be recovered, then remain in 600 kilograms of concentrated seawaters containing 35 kilograms of sea salt.So when utilizing residue concentrated seawater to produce sea salt, energy consumption cost reduced rate is: 50% × 400/865=23%, is also just equivalent to Salt production cost and reduces 0.13 yuan/kilogram × 23% ≈ 0.03 yuan/kilogram.So produce 1t fresh water and utilize concentrated seawater to produce sea salt, sea salt cost reduces 87.5 kilograms × 0.03 yuan of/kilogram of ≈ 2.6 yuan.
Present invention omits jerk pump, make system energy efficiency to improve more than 10%, so produce 1t fresh water, the cost of producing of sea salt again reduces 0.13 yuan/kilogram × 50% × 10% × 87.5 kilograms=0.57 yuan.
So, adopt method of the present invention and device to produce 1t fresh water, can be cost-saving: 2.6+0.57=3.17 unit.
To produce the sea water desaltination of 10000t fresh water daily, daily output 10000t fresh water, sea salt 875t can be produced, then utilize ordinary method, cost is needed every day to be 130 × 875+6 × 10000=173750 unit, the cost of so 1 year (by 365 days) is 173750 × 365=6341.875 ten thousand yuan, adopts method of the present invention and device 1 year can cost-saving 365 × 10000 × 3.17=1157.05 ten thousand yuan, has considerable economic benefit, social benefit and using value.
Claims (1)
1. sea water desaltination and a salt manufacturing integrated apparatus, is characterized in that this device comprises: service pump (12), plunger tpe supercharging device (15), pulsating energy interchanger (3), fan (1), well heater (2), spray crystallization salt making apparatus (4), reverse osmosis membrane assembly (7), complementary energy recovery device (8) and topping-up pump (9), the feed-water end of described service pump (12) is communicated with seawater marine greatly, two-way is divided in the water side of described service pump (12), wherein a road is successively through described plunger tpe supercharging device (15), pulsating energy interchanger (3) produces stable high pressure sea water, an other road is successively through complementary energy recovery device (8), topping-up pump (9) converges with the high pressure sea water of discharging from pulsating energy interchanger (3) and enters reverse osmosis membrane assembly (7) preparing fresh, the high-pressure thick seawater of discharging from described reverse osmosis membrane assembly (7) produces low-press thick seawater through complementary energy recovery device (8), low-press thick seawater enters in described spray crystallization salt making apparatus (4), the steady air flow of discharging from described fan (1) is successively through described well heater (2), the hot gas flow that pulsating energy interchanger (3) produces pulsation enters in described spray crystallization salt making apparatus (4), hot gas flow mixing evaporative crystallization salt manufacturing in spray crystallization salt making apparatus (4) of described low-press thick seawater and pulsation, described pulsating energy interchanger (3) comprises mutually isolated thermal current passway (30) and high pressure sea water passage (31), described thermal current passway (30) is positioned at directly over described high pressure sea water passage (31), the downside of described thermal current passway (30) is provided with piston mouth (35), the upside of described high pressure sea water passage (31) is provided with changes pressure chamber (36), described in change in pressure chamber (36) piston valve (37) being provided with and can stretching in described piston mouth (35), described piston valve (37) is provided with balancing weight (39).
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| CN201510934513.4A CN105540968B (en) | 2015-01-13 | 2015-01-13 | Desalinization and salt manufacturing integrated apparatus |
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| CN201510934515.3A Expired - Fee Related CN105439351B (en) | 2015-01-13 | 2015-01-13 | Desalinization and salt manufacturing integrated apparatus |
| CN201510934576.XA Expired - Fee Related CN105439352B (en) | 2015-01-13 | 2015-01-13 | Desalinization and salt manufacturing integrated apparatus |
| CN201510934654.6A Expired - Fee Related CN105439354B (en) | 2015-01-13 | 2015-01-13 | Desalinization and salt manufacturing integrated apparatus |
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| CN201510934515.3A Expired - Fee Related CN105439351B (en) | 2015-01-13 | 2015-01-13 | Desalinization and salt manufacturing integrated apparatus |
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| CN201510934654.6A Expired - Fee Related CN105439354B (en) | 2015-01-13 | 2015-01-13 | Desalinization and salt manufacturing integrated apparatus |
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Also Published As
| Publication number | Publication date |
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| CN105439353B (en) | 2017-10-13 |
| CN105502784B (en) | 2018-03-02 |
| CN105502784A (en) | 2016-04-20 |
| CN104591461B (en) | 2016-04-27 |
| CN105540968B (en) | 2017-10-13 |
| CN104591461A (en) | 2015-05-06 |
| CN105439351B (en) | 2017-10-27 |
| CN105439352A (en) | 2016-03-30 |
| CN105439352B (en) | 2017-10-13 |
| CN105439353A (en) | 2016-03-30 |
| CN105439351A (en) | 2016-03-30 |
| CN105439354B (en) | 2017-10-13 |
| CN105439354A (en) | 2016-03-30 |
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