CN107032426A - A kind of low temperature multi-effect seawater desalting system - Google Patents
A kind of low temperature multi-effect seawater desalting system Download PDFInfo
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- CN107032426A CN107032426A CN201710268409.5A CN201710268409A CN107032426A CN 107032426 A CN107032426 A CN 107032426A CN 201710268409 A CN201710268409 A CN 201710268409A CN 107032426 A CN107032426 A CN 107032426A
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- 239000013535 sea water Substances 0.000 title claims abstract description 103
- 238000011033 desalting Methods 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 92
- 239000013505 freshwater Substances 0.000 claims abstract description 72
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000002351 wastewater Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 15
- 239000003643 water by type Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 5
- 238000010025 steaming Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 2
- 238000010612 desalination reaction Methods 0.000 abstract description 10
- 238000001704 evaporation Methods 0.000 description 10
- 238000009833 condensation Methods 0.000 description 9
- 230000005494 condensation Effects 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 9
- 239000003507 refrigerant Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C02F1/043—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/007—Energy recuperation; Heat pumps
-
- 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
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- 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
-
- 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
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
A kind of low temperature multi-effect seawater desalting system, including First Heat Exchanger, the second heat exchanger, the n-th heat exchanger, the first fluid reservoir, the second fluid reservoir, the n-th fluid reservoir, choke valve, heat pump compressor, evaporator with heat pump, First Heat Exchanger circulating pump, the circulation of the second heat exchanger, the n-th heat exchanger circulating pump, the first fresh water water pump, the n-th 1 fresh water water pump, the n-th fresh water water pump, the first waste water water pump, the second waste water water pump, the n-th waste water water pump, seawater main road, waste water total pipeline and fresh water total pipelines, wherein n >=2；High temperature heat source of the condenser of the invention by the use of heat pump circulating system as desalinization, people's evaporator as desalinization low-temperature heat source, multistage seawater desalination system is provided between high temperature heat source and low-temperature heat source, whole desalinization is circulated under Low Temperature Difference and completed, heat exchange is close to Carnot cycle, and CUP values are close to 10.
Description
Technical field
The present invention relates to low-temperature multiple-effect seawater desalination technical field, more particularly, to a kind of low-temperature multiple-effect seawater desalination system
System.
Background technology
Coastal industrial and mining enterprises are power consumption and use water rich and influential family, if these industrial and mining enterprises' low temperature heats are light in seawater
Change, both rationally make use of residual heat resources, the problem of solving shortage of fresh water again, is increased income and decreased expenditure at energy-saving and emission-reduction of can yet be regarded as
Major action.
Low temperature multiple-effect distillation (LT-MED) desalination technology refers to that the seawater of about 70 DEG C of the highest evaporating temperature of seawater is light
Change technology, a series of Falling Film Evaporator of Horizontal Tube is together in series and is divided into some effects, is inputted and steamed with a certain amount of steam
Device is sent out, by multiple evaporation and condensation, obtains being multiple times than the distilled water of heating quantity of steam.
At present, the waste heat used in low temperature multiple-effect distillation sea water desalting technology is vapor form, i.e., produce industrial and mining enterprises
Steam directly feed sea water desalinating unit, seawater is occurred low-temperature evaporation and condensation, so as to produce fresh water.Directly utilize steam
Carrying out desalinization, to there is steam cost high, and height, which is forced down with causing to waste, sea water desalting equipment fouling tendency is relatively large etc. asks
Topic.
The content of the invention
In view of this, object of the present invention is to provide a kind of low temperature multi-effect seawater desalting system.
To achieve these goals, the present invention provides following technical scheme：A kind of low temperature multi-effect seawater desalting system, bag
Include First Heat Exchanger, the second heat exchanger, the n-th heat exchanger, the first fluid reservoir, the second fluid reservoir, the n-th fluid reservoir, choke valve, heat pump
Compressor and evaporator with heat pump, it is characterised in that：Also include First Heat Exchanger circulating pump, the circulation of the second heat exchanger, the n-th heat exchanger
Circulating pump, the first fresh water water pump, the (n-1)th fresh water water pump, the n-th fresh water water pump, the first waste water water pump, the second waste water water pump, n-th are given up
Water water pump, seawater inlet water pump, seawater main road, waste water total pipeline and fresh water total pipeline, wherein n >=2；First heat exchange
Device is sequentially communicated composition heat pump circulating system as the condenser of heat pump with choke valve, evaporator with heat pump, heat pump compressor；Institute
The entrance for stating seawater inlet water pump is connected on the entrance in seawater main road；First fluid reservoir to the n-th fluid reservoir leads to respectively
Piping is connected with seawater main road；The first waste water water pump to the n-th waste water water pump is connected to corresponding by pipeline respectively
First fluid reservoir is between the n-th fluid reservoir and waste water total pipeline, for evacuating the concentrated seawater in corresponding fluid reservoir；Described first
Heat exchanger circulating pump to the outlet of the n-th heat exchanger circulating pump is connected by pipeline with corresponding first fluid reservoir to the n-th fluid reservoir,
Its entrance is connected with the entrance of corresponding First Heat Exchanger to the n-th heat exchanger shell, the First Heat Exchanger to the n-th Tube Sheet of Heat Exchanger
The outlet of shell is connected to corresponding first fluid reservoir to the n-th fluid reservoir by pipeline；Second heat exchanger to the n-th heat exchanger is changed
The entrance of heat pipe bundle is connected to corresponding first fluid reservoir to the (n-1)th fluid reservoir by pipeline, and the n-th fluid reservoir is connected to heat pump steaming
Send out the entrance of device shell；The outlet of second heat exchanger to the n-th heat exchanger heat-exchanging tube bundle connects corresponding first fresh water pump to (n-1)th
The entrance of fresh water pump, the entrance of the n-th fresh water water pump is connected to the outlet of evaporator with heat pump shell；First fresh water pump to the n-th fresh water
The outlet of pump is connected to fresh water total pipeline.
Further, the outlet of the seawater inlet water pump is connected with seawater electromagnetic valve or seawater check valve.
Further, the outlet of the waste water total pipeline is connected with waste water magnetic valve or waste water check valve.
Further, the outlet of the fresh water total pipeline is connected with fresh water magnetic valve or fresh water check valve.
Further, i-th heat exchanger and evaporator with heat pump use shell and tube exchanger, wherein i=1 ~ n.
Further, it is provided with the i-th water level detecting equipment in i-th fluid reservoir, the i-th water level detecting equipment is used to detecting the
The height of i fluid reservoir maritime interior waters, the amount of the i-th fluid reservoir maritime interior waters, wherein i=1 ~ n are supplemented according to setting value by seawater water pump.
Further, it is provided with the i-th concentration detection device in i-th fluid reservoir, the i-th concentration detection device is used to detecting the
The concentration of i fluid reservoir maritime interior waters, when the concentration of the i-th fluid reservoir maritime interior waters reaches certain value, is evacuated by the i-th waste water water pump and stored up
High concentration seawater in flow container, wherein i=1 ~ n.
Further, described system also include the pumped vacuum systems, pumped vacuum systems respectively with each heat exchanger and
Evaporator with heat pump connection is vacuumized.
The beneficial effect brought of technical scheme that embodiments of the invention are provided is：Utilize the condenser of heat pump circulating system
（First Heat Exchanger）As the high temperature heat source of desalinization, the evaporator of heat pump circulating system as desalinization Low Temperature Thermal
The temperature difference of source, high temperature heat source and low-temperature heat source is between 30 DEG C ~ 40 DEG C, and high temperature heat source is exchanged heat with seawater for the first time, and generation is opened
Dynamic steam, starting the seawater progress heat exchange condensation of steam and the second effect seawater desalination system turns into fresh water, and the second effect seawater is light
The seawater of change system produces new steam and enters the progress heat exchange condensation of next heat exchanger, the steam and heat pump cycle of last effect
The evaporator of system is exchanged heat, and is condensed into fresh water；Whole desalinization is circulated under Low Temperature Difference and completed, and heat exchange is followed close to Kano
Ring, CUP values are close to 10；Steam is partly produced during other evaporation of seawater, steam and seawater are distributed in heat exchanger inner homogeneous,
Quickly flowing, prevents the fouling of the internal heat tube wall of heat exchanger.
Brief description of the drawings
Fig. 1 seawater desalination system structural representations of the present invention.
Fig. 2 is the structural representation of fluid reservoir in Fig. 1.
In figure：1st, evaporator with heat pump；2nd, heat pump compressor；31st, First Heat Exchanger；32nd, the second heat exchanger；3n, the n-th heat exchange
Device；4th, choke valve；51st, the first fluid reservoir；52nd, the second fluid reservoir；5n, the n-th fluid reservoir；61st, First Heat Exchanger circulating pump；62、
Second heat exchanger circulating pump；6n, the n-th heat exchanger circulating pump；7th, seawater inlet water pump；81st, the first fresh water water pump；8n-1, (n-1)th
Fresh water water pump；8n, the n-th fresh water water pump；91st, the first waste water water pump；92nd, the second waste water water pump；9n, the n-th waste water water pump；101st,
One water level detecting equipment；102nd, the second water level detecting equipment；10n, the n-th water level detecting equipment；111st, the first concentration detection device；
112nd, the second concentration detection device；11n, the n-th concentration detection device；12nd, seawater main road；13rd, seawater check valve；14th, fresh water
Total pipeline；15th, fresh water check valve；16th, waste water total pipeline；17th, waste water check valve；181st, the stop valve of vacuum pump inlet first；
182nd, the stop valve of vacuum pump inlet second；18n, the stop valve of vacuum pump inlet n-th；18n+1, the stop valve of vacuum pump inlet (n+1)th；
19th, vavuum pump.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is further described.
Referring to Fig. 1, the invention provides a kind of low temperature multi-effect seawater desalting system, including heat pump circulating system and
Multi-effect evaporation system.
Heat pump circulating system includes First Heat Exchanger 31 (heat pump condenser), the refrigeration of the heat-exchanging tube bundle of First Heat Exchanger 31
Agent outlet is connected with the high pressure entry of choke valve 4, the low tension outlet of choke valve 4 and the refrigeration of the heat-exchanging tube bundle of evaporator with heat pump 1
Agent entrance is connected, and the refrigerant outlet of the heat-exchanging tube bundle of evaporator with heat pump 1 is connected with the entrance of heat pump compressor 2, heat pump pressure
The outlet of contracting machine 2 is connected with the refrigerant inlet of the heat-exchanging tube bundle of First Heat Exchanger 31, so constitutes heat pump circulating system, heat pump
The working medium of circulatory system inner loop is any one in R22, R134a or R410a.
Multi-effect evaporation system include by 31 ~ 3n of heat exchanger, evaporator with heat pump 1,51 ~ 5n of fluid reservoir, heat exchanger circulating pump 61 ~
6n, seawater inlet water pump 7,81 ~ 8n of fresh water water pump, 91 ~ 9n of waste water water pump, seawater main road 12, waste water total pipeline 16, fresh water are total
The first effect vapo(u)rization system that pipeline 14, seawater check valve 13, fresh water check valve 15, waste water check valve 17 are constituted to the n-th effect is evaporated
System；Wherein n is greater than 1 integer.
31 ~ the 3n of heat exchanger and evaporator with heat pump 1 use shell and tube exchanger；51 ~ the 5n of fluid reservoir be used for pair
Gas-liquid separation and storage are carried out into the material in fluid reservoir, 51 ~ 5n of fluid reservoir there are five external-connected ports, referring to Fig. 2, storage
51 ~ 5n of flow container five external-connected ports are respectively e1, e2, e3, e4, e5.
The entrance of the seawater inlet water pump 7 is connected to the porch in seawater main road 12, and its outlet is connected with seawater list
To valve 13.51 ~ 5n of each fluid reservoir e5 ports are connected in parallel on seawater main road 12 by pipeline respectively.
91 ~ 9n of waste water water pump entrance is connected to 51 ~ 5n of correspondence fluid reservoir e4 ports by pipeline, passes through
The pipe end of e4 ports is located at the bottom of liquid in 51 ~ 5n of fluid reservoir, can realize and the liquid inside 51 ~ 5n of fluid reservoir is entered
Row emptying, 91 ~ 9n of waste water water pump outlets are connected with waste water total pipeline 12 respectively, and the exit of waste water house steward is provided with waste water check valve
17, place the backflow of waste water.
61 ~ 6n of heat exchanger circulating pump entrance is connected to corresponding 51 ~ 5n of fluid reservoir e3 ports by pipeline, wears
The pipe end for crossing e3 ports is located at the bottom of liquid in 51 ~ 5n of fluid reservoir, and 61 ~ 6n of heat exchanger circulating pump outlet passes through pipeline
Connected with the entrances of corresponding 31 ~ 3n of heat exchanger shells, the outlets of heat exchanger 31 ~ 3n shells by pipeline be connected to fluid reservoir 51 ~
5n e2 ports；61 ~ 6n of heat exchanger circulating pump, 51 ~ 5n of 31 ~ 3n of a heat exchanger shells and fluid reservoir seawater is so formed to change
Hot partial circulating.
The entrance of heat exchanger 32 ~ 3n heat-exchanging tube bundles is connected to 51 ~ 5n-1 of fluid reservoir e1 ports, the n-th liquid storage by pipeline
Tank 5n e1 ports are connected to the entrance of the shell of evaporator with heat pump 1；Through the pipe end position of 51 ~ 5n-1 of fluid reservoir e1 ports
In the top of liquid in 51 ~ 5n of fluid reservoir.
81 ~ 8n of fresh water water pump outlet is connected to fresh water total pipeline 14, and the exit of fresh water total pipeline 14 is set
There is fresh water check valve 15；81 ~ 8n-1 of fresh water water pump entrance is connected to the outlet of corresponding 32 ~ 3n of heat exchanger heat-exchanging tube bundles；N-th
Fresh water water pump 8n entrance is connected to the outlet of the shell of evaporator with heat pump 1.
Be equipped with the 51 ~ 5n of fluid reservoir 101 ~ 10n of corresponding water level detecting equipment and concentration detection device 111 ~
11n；101 ~ 10n of water level detecting equipment is used for the height for detecting fluid reservoir 51 ~ 5n maritime interior waters, is entered according to setting value by seawater
Saliva pump 7 carries out the amount of supplement fluid reservoir 51 ~ 5n maritime interior waters；111 ~ 11n of concentration detection device is used to detect in 51 ~ 5n of fluid reservoir
The concentration of seawater, when the concentration of fluid reservoir 51 ~ 5n maritime interior waters reaches certain value, 91 ~ 9n of waste water water pump is opened, and evacuates fluid reservoir
Concentrated seawater in 51 ~ 5n.
31 ~ the 3n of heat exchanger and evaporator with heat pump 1, which also leave one, is used for the exit passageway that vacuumizes, and heat exchanger 31 ~
3n exit passageway is connected with vacuum pump inlet stop valve 181 ~ 18n entrances respectively, the exit passageway and vacuum of evaporator with heat pump 1
Pump intake stop valve 18n+1 entrances are connected, and 181 ~ 18n+1 of vacuum pump inlet stop valve outlet is connected with the entrance of vavuum pump 19,
The outlet of vavuum pump 19 is connected with air.
Be additionally provided with sea water preprocessing equipment between the seawater inlet water pump 7 and seawater, seawater enter desalination system it
Before, sea water preprocessing equipment is first sent into, sea water preprocessing equipment is pre-processed to seawater, and the bulky grain filtered out in seawater is miscellaneous
Matter, is then desalinated into seawater desalination system（Do not mark out and in Fig. 1）.
Using seawater desalination system provided in an embodiment of the present invention when in use：
Heat pump cycle process：Refrigerant is compressed into high temperature and high pressure gas in heat pump compressor 3, is changed into First Heat Exchanger 31
In heat pipe bundle, then exchanged heat with the seawater in the shell of First Heat Exchanger 31, refrigerant heat release is condensed into liquid through throttling
The puffing of valve 4 enters in the heat-exchanging tube bundle of evaporator with heat pump 1, and the refrigerant suction heat pump in the heat-exchanging tube bundle of evaporator with heat pump 1 steams
The heat of steam turns into steam and returns to heat pump compressor 2 in the hair shell of device 1, so as to complete kind of refrigeration cycle.
Desalting process：Seawater inlet water pump 7 is according to 101 ~ 10n of water level detecting equipment in corresponding 51 ~ 5n of fluid reservoir
51 ~ 5n of instruction continuous extracting seawater feeding fluid reservoir in；First Heat Exchanger circulating pump 61 is extracted in the first fluid reservoir 51
Exchanged heat in the seawater feeding shell of First Heat Exchanger 31 with the heat-exchanging tube bundle inner refrigerant of First Heat Exchanger 31, absorption refrigeration agent is put
The heat gone out, part evaporation of seawater is changed into steam, and the gas-fluid two-phase mixture, which enters in the first fluid reservoir 51, carries out gas-liquid separation,
Steam in first fluid reservoir 51 enters in the heat-exchanging tube bundle of the second heat exchanger 32 under pressure in taking out for the first fresh water water pump 81, and second
Heat exchanger circulating pump 62 is extracted to be changed in the seawater feeding shell of the second heat exchanger 32 in the second fluid reservoir 52 with the second heat exchanger 32
Steam in heat pipe bundle is exchanged heat, and steam exothermic condensation sends into fresh water total pipeline 14 into fresh water through the first fresh water water pump 81（It is complete
Into first time fresh water output）, while the heat of Absorption by Sea Water steam, part evaporation of seawater is steam, then the gas-liquid two-phase is mixed
Compound, which enters the steam that carries out in gas-liquid separation, the second fluid reservoir 52 in the second fluid reservoir 52 and enters the 3rd heat exchanger 33, to exchange heat
Exchanged heat in tube bank with the seawater in its shell, by that analogy, pressure, previous liquid storage are taken out through the n-1 of the (n-1)th fresh water water pump 8
Steam in tank enters in the n-th heat exchanger 3n heat-exchanging tube bundles, while the n-th heat exchanger circulating pump 6n is extracted in the n-th fluid reservoir 5n
Seawater send into the n-th heat exchanger 3n shells in is exchanged heat with the steam in the n-th heat exchanger 3n heat-exchanging tube bundles, steam exothermic condensation into
Fresh water, fresh water total pipeline 14 is sent into through the n-1 of the (n-1)th fresh water water pump 8（Complete (n-1)th fresh water output）, while Absorption by Sea Water is steamed
The heat of vapour, part evaporation of seawater is steam, and the gas-fluid two-phase mixture, which enters in the n-th fluid reservoir 5n, carries out gas-liquid separation, n-th
Steam in fluid reservoir 5n through the n of the n-th fresh water water pump 8 take out pressure into the shell of evaporator with heat pump 1 with it is hot during heat pump cycle
Refrigerant in the heat-exchanging tube bundle of pump evaporator 1 carries out steam exothermic condensation in heat exchange, the shell of evaporator with heat pump 1 into fresh water,
Through the n of the n-th fresh water water pump 8 feeding fresh water total pipeline 14（Complete n-th fresh water output）, so as to complete desalting process.
In addition, in desalting process, 111 ~ 11n of concentration detection device constantly detects fluid reservoir 51 ~ 5n maritime interior waters
Concentration, when the concentration of fluid reservoir 51 ~ 5n maritime interior waters reaches certain value, 91 ~ 9n of waste water water pump is opened, and evacuates 51 ~ 5n of fluid reservoir
Interior concentrated seawater, then seawater inlet water pump 7 refill seawater new in 51 ~ 5n of fluid reservoir and desalinated.
With reference to Fig. 1, the carrying out practically process to seawater desalination system of the present invention is further described：
First, vacuumized, open vacuum pump inlet 181 ~ 18n+1 of stop valve, vavuum pump 17 is opened, by heat pump refrigeration cycle
System and multi-effect evaporation system are evacuated to the vacuum set, and 181 ~ 18n+1 of vacuum pump inlet stop valve is used to control often effect steaming
Air pressure in hair system.
Exhaust after vacuum, close vacuum pump inlet 181 ~ 18n+1 of stop valve, turn off vavuum pump 17, be then turned on seawater
Entrance water pump 7, seawater inlet water pump 7 will need to desalinize seawater in 51 ~ 5n of feeding fluid reservoir by seawater main road 12.Open heat
Pump compressor 3, opens heat exchanger 61 ~ 6n of circulating pump, and 61 ~ 6n of heat exchanger circulating pump extracts the seawater feeding in 51 ~ 5n of fluid reservoir
In heat exchanger 31 ~ 3n shells, in First Heat Exchanger 31, the seawater in the shell of First Heat Exchanger 31 exchanges heat with First Heat Exchanger 31
Refrigerant in tube bank is exchanged heat, in 32 ~ 3n of heat exchanger, and the seawater in heat exchanger 32 ~ 3n shells is changed with 32 ~ 3n of heat exchanger
Steam is exchanged heat in heat pipe bundle, and then the gas-fluid two-phase mixture of seawater is admitted in 51 ~ 5n of feeding fluid reservoir and carries out gas-liquid
Separation；Open fresh water 81 ~ 8n of water pump, the steam that 81 ~ 8n-1 of fresh water water pump is extracted in fluid reservoir 51 ~ 5n-1 enter heat exchanger 31 ~
In 3n heat-exchanging tube bundles, steam carries out heat exchange in 31 ~ 3n of heat exchanger heat-exchanging tube bundles with heat exchanger 31 ~ 3n shells maritime interior waters, steams
Vapour exothermic condensation sends into fresh water total pipeline 14 into fresh water by 81 ~ 8n-1 of fresh water water pump, while the n-th fresh water water pump 8n extracts liquid storage
Steam in tank 5n enters in the shell of evaporator with heat pump 1, and heat exchange is carried out with the refrigerant in the heat-exchanging tube bundle of evaporator with heat pump 1,
Steam exothermic condensation in the shell of evaporator with heat pump 1 sends into fresh water total pipeline 14 into fresh water through the n of the n-th fresh water water pump 8.
Herein, the involved noun of locality such as forward and backward, upper and lower is to be located at parts in accompanying drawing in figure and zero
The position of part each other is intended merely to the clear of expression technology scheme and conveniently come what is defined.It should be appreciated that the noun of locality
Use should not limit the claimed scope of the application.In the case where not conflicting, embodiment and embodiment herein-above set forth
In feature can be combined with each other.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (8)
1. a kind of low temperature multi-effect seawater desalting system, including First Heat Exchanger, the second heat exchanger, the n-th heat exchanger, the first liquid storage
Tank, the second fluid reservoir, the n-th fluid reservoir, choke valve, heat pump compressor and evaporator with heat pump, it is characterised in that：Also changed including first
Hot device circulating pump, the circulation of the second heat exchanger, the n-th heat exchanger circulating pump, the first fresh water water pump, the (n-1)th fresh water water pump, the n-th fresh water
Water pump, the first waste water water pump, the second waste water water pump, the n-th waste water water pump, seawater inlet water pump, seawater main road, waste water total pipeline
And fresh water total pipeline, wherein n >=2；The First Heat Exchanger as heat pump condenser, with choke valve, evaporator with heat pump, heat
Pump compressor is sequentially communicated composition heat pump circulating system；The entrance of the seawater inlet water pump is connected to the entrance in seawater main road
On；First fluid reservoir to the n-th fluid reservoir is connected by pipeline with seawater main road respectively；The first waste water water pump is to
N waste water water pump is connected to corresponding first fluid reservoir between the n-th fluid reservoir and waste water total pipeline by pipeline respectively, for taking out
Concentrated seawater in empty corresponding fluid reservoir；The outlet of the First Heat Exchanger circulating pump to the n-th heat exchanger circulating pump passes through pipeline
Connected with corresponding first fluid reservoir to the n-th fluid reservoir, its entrance entering to the n-th heat exchanger shell with corresponding First Heat Exchanger
Mouth connection, the First Heat Exchanger to the outlet of the n-th heat exchanger shell is connected to corresponding first fluid reservoir to n-th by pipeline
Fluid reservoir；The entrance of second heat exchanger to the n-th heat exchanger heat-exchanging tube bundle by pipeline is connected to corresponding first fluid reservoir
To the (n-1)th fluid reservoir, the n-th fluid reservoir is connected to the entrance of evaporator with heat pump shell；Second heat exchanger to the n-th heat exchanger heat-exchanging tube
The entrance of corresponding first fresh water pump to the (n-1)th fresh water pump of outlet connection of beam, the entrance of the n-th fresh water water pump is connected to heat pump steaming
Send out the outlet of device shell；The outlet of first fresh water pump to the n-th fresh water pump is connected to fresh water total pipeline.
2. a kind of low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that the seawater inlet water pump
Outlet be connected with seawater electromagnetic valve or seawater check valve.
3. a kind of low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that the waste water total pipeline
Outlet is connected with waste water magnetic valve or waste water check valve.
4. a kind of low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that the fresh water total pipeline
Outlet is connected with fresh water magnetic valve or fresh water check valve.
5. a kind of low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that i-th heat exchanger and
Evaporator with heat pump uses shell and tube exchanger, wherein i=1 ~ n.
6. a kind of low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that in i-th fluid reservoir
Provided with the i-th water level detecting equipment, the i-th water level detecting equipment is used for the height for detecting the i-th fluid reservoir maritime interior waters, logical according to setting value
Cross the amount that seawater water pump supplements the i-th fluid reservoir maritime interior waters, wherein i=1 ~ n.
7. a kind of low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that in i-th fluid reservoir
Provided with the i-th concentration detection device, the i-th concentration detection device is used for the concentration of the i-th fluid reservoir maritime interior waters, when the i-th fluid reservoir inland sea
When the concentration of water reaches certain value, the high concentration seawater in fluid reservoir, wherein i=1 ~ n are evacuated by the i-th waste water water pump.
8. a kind of low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that described system also includes
Pumped vacuum systems, pumped vacuum systems is connected with each heat exchanger and evaporator with heat pump is vacuumized respectively.
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| CN201710268409.5A CN107032426A (en) | 2017-04-22 | 2017-04-22 | A kind of low temperature multi-effect seawater desalting system |
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| CN201710268409.5A CN107032426A (en) | 2017-04-22 | 2017-04-22 | A kind of low temperature multi-effect seawater desalting system |
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