CN103058438A - Hot film coupling seawater desalination system - Google Patents
Hot film coupling seawater desalination system Download PDFInfo
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- CN103058438A CN103058438A CN2013100024177A CN201310002417A CN103058438A CN 103058438 A CN103058438 A CN 103058438A CN 2013100024177 A CN2013100024177 A CN 2013100024177A CN 201310002417 A CN201310002417 A CN 201310002417A CN 103058438 A CN103058438 A CN 103058438A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention relates to the technical field of seawater desalination, in particular to a hot film coupling seawater desalination system, and the energy consumption of the hot film coupling sweater desalination system is reduced. The hot film coupling seawater desalination system comprises a seawater pretreatment unit, a reverse osmosis unit communicated with a water outlet of the seawater pretreatment unit, and a low-temperature multi-effect unit communicated with a concentrated seawater outlet of the reverse osmosis unit, wherein a steam turbine is arranged on a steam inlet pipeline of the low-temperature multi-effect unit and coupled with a high-pressure pump of the reverse osmosis unit. According to the hot film coupling sweater desalination system, the high-pressure pump is driven to work by applying work by utilizing steam expansion, the utilization rate of steam heat energy is increased, and the power consumption of the high-pressure pump is reduced, so that the power consumption of the hot film coupling sweater desalination system is reduced.
Description
Technical field
The present invention relates to field of sea water desalting technology, particularly a kind of hotting mask coupling seawater desalination system.
Background technology
The hotting mask coupling technique adopts hot method and embrane method sea water desaltination mode linked together that seawater is desalinated processing, to satisfy different water demands.
At present, hotting mask coupling seawater desalination system commonly used adopts the coupling technique of low-temperature multiple-effect seawater desalination and reverse osmosis seawater desalting, comprise: low-temperature multi-effect unit and reverse osmosis units, and low-temperature multi-effect unit and the shared sea water preprocessing unit of reverse osmosis units; When the above-mentioned hotting mask coupling of operation seawater desalination system, the sea water preprocessing unit is respectively the low-temperature multi-effect unit and reverse osmosis units provides pretreated raw material seawater, low-temperature multi-effect unit and reverse osmosis units separately independent operating are desalinated processing to seawater, the concentrated seawater of discharging mixes mutually, and the fresh water of discharging mixes to satisfy different water demands by a certain percentage.
But, above-mentioned coupling technique only is the simple combination of two kinds of desalination technologies, be that low-temperature multi-effect unit and reverse osmosis units share the sea water preprocessing unit, low-temperature multi-effect unit and reverse osmosis units be independent operating separately, do not take full advantage of this two kinds of advantages that desalination technology has separately, wherein the required steam admission pressure in low-temperature multi-effect unit is generally 0.3 kilogram, and the vapor pressure that provides vapour source to provide is generally 5 kilograms, has wasted steam thermal energy; And the high-pressure pump work in the reverse osmosis units also consumes a large amount of electric energy.Therefore, the energy consumption that how to reduce hotting mask coupling seawater desalination system becomes those skilled in the art's urgent problem.
Summary of the invention
The object of the present invention is to provide a kind of hotting mask coupling seawater desalination system, be used for reducing the energy consumption of hotting mask coupling seawater desalination system.
To achieve these goals, the invention provides following technical scheme:
A kind of hotting mask coupling seawater desalination system comprises: the sea water preprocessing unit, and the reverse osmosis units that is communicated with described sea water preprocessing unit water outlet, the low-temperature multi-effect unit that is communicated with described reverse osmosis units concentrated seawater water outlet, wherein,
Be provided with steam turbine on the steam admission passage of described low-temperature multi-effect unit, and the high pressure pump shaft of described steam turbine and described reverse osmosis units connection.
Preferably, described steam turbine is by shaft coupling and described high pressure pump shaft connection.
Preferably, described high-pressure pump is the multi-stage type high-pressure pump.
Preferably, described reverse osmosis units also comprises:
Ultrafiltration module, described ultrafiltration module water-in is communicated with described sea water preprocessing unit water outlet, and described ultrafiltration module water outlet is communicated with described high-pressure pump water-in;
Reverse osmosis module, described reverse osmosis module water-in is communicated with described high-pressure pump water outlet;
Energy recycle device, the former seawater water-in of described energy recycle device is communicated with described ultrafiltration module water outlet, the former seawater water outlet of described energy recycle device is communicated with described reverse osmosis module water-in, described energy recycle device concentrated seawater water-in is communicated with described reverse osmosis module concentrated seawater water outlet, and described energy recycle device concentrated seawater water outlet is communicated with described low-temperature multi-effect unit seawater water-in.
Preferably, described low-temperature multi-effect unit comprises: the multiple-effect evaporator that is communicated with described energy recycle device concentrated seawater outlet, the supplementary heat exchanger that is communicated with the vapour outlet of described multiple-effect evaporator, described supplementary heat exchanger water-in is communicated with described sea water preprocessing unit water outlet, and described supplementary heat exchanger water outlet is communicated with described ultrafiltration module water-in.
Preferably, described supplementary heat exchanger is tube and shell heat exchanger.
Further, above-mentioned hotting mask coupling seawater desalination system comprises: be communicated with the first bypass of described sea water preprocessing unit water outlet and described ultra-filtration equipment water-in, and be arranged on the switch-valve in described the first bypass.
Further, above-mentioned hotting mask coupling seawater desalination system comprises: the second bypass that two ends are communicated with described steam turbine steam inlet and steam outlet respectively, and be arranged on pressure regulator valve and desuperheater in described the second bypass.
Preferably, described sea water preprocessing unit comprises: settling tank, be communicated with the raw material seawater suction culvert with described settling tank water-in, be arranged on the former seawater intake pump on the described raw material seawater suction culvert, and the seawater working shaft that is communicated with described settling tank water outlet.
From technique scheme as can be known, in hotting mask coupling seawater desalination system provided by the invention, steam enters the turbine expansion acting, and steam turbine drives high-pressure pump work, reduces the electric energy that high-pressure pump consumes; The exhaust steam of discharging from steam turbine enters heat exchange in the multiple-effect evaporator the low-temperature multi-effect unit, has improved steam utilization.The reverse osmosis units seawater rate of recovery is lower, and required pressure is lower, so energy consumption is lower, and after preliminary the concentrating of seawater through reverse osmosis units, the low-temperature multi-effect unit that enters high-recovery further concentrates, and has improved the rate of recovery.Therefore, compared with prior art, adopt hotting mask coupling seawater desalination system provided by the invention to carry out sea water desaltination and process, reduced the energy consumption of hotting mask coupling seawater desalination system, and improved the seawater rate of recovery.
Description of drawings
The structural representation of the hotting mask coupling seawater desalination system that Fig. 1 provides for the embodiment of the invention.
Reference numeral:
The former seawater intake pump of 10-sea water preprocessing unit 11-12-seawater working shaft
20-reverse osmosis units 21-ultrafiltration module 22-high-pressure pump 23-reverse osmosis membrane assembly
24-energy recycle device 30-low-temperature multi-effect unit 31 multiple-effect evaporator 32-supplementary heat exchangers
33-steam turbine 41-raw material seawater suction culvert 42-steam admission passage
43-concentrated seawater discharge pipe 44-fresh water discharge pipe.
Embodiment
In the existing hotting mask coupling seawater desalination system, reverse osmosis units and low-temperature multi-effect unit independently carry out sea water desaltination separately to be processed, high-pressure pump in the reverse osmosis units consumes much electricity, and a lot of steam thermal energies are wasted in the low-temperature multi-effect unit, causes hotting mask coupling seawater desalination system energy consumption higher.
In view of this, the invention provides a kind of hotting mask coupling seawater desalination system, a steam turbine is set on the steam admission passage, and with the high pressure pump shaft of steam turbine and reverse osmosis units connection, utilize the vapor expansion acting to drive high-pressure pump work, the utilization ratio of steam thermal energy is provided, reduces the electric energy that high-pressure pump consumes, thereby reduce the energy consumption of hotting mask coupling seawater desalination system.
In order to make those skilled in the art better understand technical scheme of the present invention, below in conjunction with Figure of description the embodiment of the invention is described in detail.
As shown in Figure 1, the hotting mask coupling seawater desalination system that the embodiment of the invention provides comprises: sea water preprocessing unit 10, the reverse osmosis units 20 that is communicated with sea water preprocessing unit 10 water outlets, the low-temperature multi-effect unit 30 that is communicated with reverse osmosis units 20 concentrated seawater water outlets, wherein
Be provided with steam turbine 33 on the steam admission passage 42 of low-temperature multi-effect unit 30, and high-pressure pump 22 axles of steam turbine 33 and reverse osmosis units 20 connection.
In the hotting mask coupling seawater desalination system that the embodiment of the invention provides, steam enters steam turbine 33 expansion actings, and steam turbine 33 drives high-pressure pump 22 work, thereby has reduced the electric energy that high-pressure pump 22 consumes; The exhaust steam of discharging from steam turbine 33 enters low-temperature multi-effect unit 30 and the seawater to make heat exchange that enters low-temperature multi-effect unit 30, has improved steam utilization.Therefore, compared with prior art, adopt hotting mask coupling seawater desalination system provided by the invention to carry out sea water desaltination and process, greatly reduced the energy consumption of hotting mask coupling seawater desalination system.
During implementation, preferably, reverse osmosis units 20 comprises: the ultrafiltration module 21 that is communicated with sea water preprocessing unit 10 water outlets, the high-pressure pump 22 that is communicated with ultrafiltration module 21 water outlets, the reverse osmosis module 23 that is communicated with high-pressure pump 22 water outlets, and energy recycle device 24; Energy recycle device 24 former seawater water-ins are communicated with ultrafiltration module 21 water outlets, energy recycle device 24 former seawater water outlets are communicated with reverse osmosis module 23 water-ins, energy recycle device 24 concentrated seawater water-ins are communicated with reverse osmosis module 23 concentrated seawater water outlets, and energy recycle device 24 concentrated seawater water outlets are communicated with low-temperature multi-effect unit 30 seawater water-ins.
When carrying out the sea water desaltination processing, steam enters steam turbine 33 expansion actings by steam admission passage 42 and drives high-pressure pump 22 rotations, from the exhaust steam supply low-temperature multi-effect unit 30 of steam turbine 33 discharges; Raw material seawater enters sea water preprocessing unit 10 by raw material seawater suction culvert 41 and carries out pre-treatment, pretreated former seawater enters ultrafiltration module 21, remove suspended matter in the former seawater and colloidalmaterial etc., then shunting, the former seawater of a part promotes by high-pressure pump 22 and enters reverse osmosis membrane assembly 23, the former seawater of another part enters reverse osmosis membrane assembly 23 after promoting by energy recycle device 24, former seawater is isolated fresh water and concentrated seawater in reverse osmosis membrane assembly 23, the fresh water that produces is discharged by fresh water discharge pipe 44, enter low-temperature multi-effect unit 30 after the concentrated seawater of discharging enters energy recycle device 24 and enters energy recycle device 24 Central Plains exchange of seawater energy from reverse osmosis membrane assembly 23, discharge hotting mask coupling seawater desalination system by concentrated seawater discharge pipe 43 after the evaporation concentration.
In the hotting mask coupling seawater desalination system that present embodiment provides, steam admission passage in low-temperature multi-effect unit 30 is provided with steam turbine 33, this steam turbine 33 and high-pressure pump 22 axles connection, preferably, high-pressure pump 22 is by shaft coupling and steam turbine 33 axles connection, and high-pressure pump is preferably the multi-stage type high-pressure pump.Hotting mask coupling seawater desalination system utilizes the expansion acting of steam thermal energy in steam turbine 33 to drive high-pressure pump 22 work, the exhaust steam of discharging from steam turbine 33 enters low-temperature multi-effect unit 30, with the concentrated seawater heat exchange that enters the low-temperature multi-effect unit, improve steam utilization, reduced the consumption of high-pressure pump to electric energy; In addition, shunting after former seawater flows out from ultrafiltration module 21, a part of former seawater is by the high-pressure pump adherence pressure, and the former seawater of another part also reduces the energy consumption of high-pressure pump by energy recycle device 24 adherence pressures; Therefore, compared with prior art, adopt hotting mask coupling seawater desalination system provided by the invention to carry out sea water desaltination and process, reduced the power consumption of hotting mask coupling seawater desalination system.
In addition, in the above-mentioned hotting mask coupling seawater desalination system, former seawater is concentrated through reverse osmosis units 20 and 30 segmentations of low-temperature multi-effect unit, the concentrated seawater of namely discharging from reverse osmosis units 20 does not directly emit, but it is concentrated to offer low-temperature multi-effect unit 30 further steaming methods, thereby improved the seawater rate of recovery.
Continuation is referring to Fig. 1, above-mentioned low-temperature multi-effect unit 30 comprises: the multiple-effect evaporator 31 that is communicated with the outlet of energy recycle device 24 concentrated seawaters, the supplementary heat exchanger 32 that is communicated with the vapour outlet of multiple-effect evaporator 31, supplementary heat exchanger 32 water-ins are communicated with sea water preprocessing unit 10 water outlets, and supplementary heat exchanger 32 water outlets are communicated with ultrafiltration module 21 water-ins.Say that in further detail low-temperature multi-effect unit 30 comprises: the multiple-effect evaporator 31 of series connection, the supplementary heat exchanger 32 that is communicated with multiple-effect evaporator 31 last single-effect evaporator vapour outlets, and fresh water discharge pipe 44 and concentrated seawater discharge pipe 43; Steam at first enters steam turbine 33 expansion actings by steam admission passage 42 and drives high-pressure pump 22 rotations, the exhaust steam of discharging from steam turbine 33 enters the first single-effect evaporator of multiple-effect evaporator 31, with the concentrated seawater heat exchange that enters in this single-effect evaporator, the fresh water of generation and concentrated seawater are discharged hotting mask coupling seawater desalination system by corresponding pipeline; The steam of discharging from last single-effect evaporator enters the supplementary heat exchanger 32, to the former heating of seawater of the supplementary heat exchanger 32 of flowing through, so arranges, and can further improve the utilization ratio of steam, reduces the energy consumption of hotting mask coupling seawater desalination system.
Preferably, above-mentioned supplementary heat exchanger 32 is tube and shell heat exchanger, and wherein steam enters in the heat-exchanging tube bundle of tube and shell heat exchanger, and former seawater enters in the shell of tube and shell heat exchanger.
For increasing the reliability of hotting mask coupling seawater desalination system, preferably, above-mentioned hotting mask coupling seawater desalination system comprises: be communicated with the first bypass of sea water preprocessing unit 10 water outlets and ultrafiltration module 21 water-ins, and be arranged on the switch-valve in the first bypass; When former seawater temperature is higher, directly enter ultrafiltration module 21 through sea water preprocessing unit 10 pretreated former seawater by the first bypass, without supplementary heat exchanger 32.
For increasing the reliability of hotting mask coupling seawater desalination system, preferably, above-mentioned hotting mask coupling seawater desalination system comprises: the second bypass that two ends are communicated with steam turbine 33 steam inlets and steam outlet respectively, and be arranged on pressure regulator valve and desuperheater in the second bypass; So arrange, steam can enter low-temperature multi-effect unit 30 by the second bypass, avoids when steam turbine breaks down, and hotting mask coupling seawater desalination system can't carry out sea water desaltination to be processed.
Seawater is before desalination is processed, and the preliminary treatment that generally need to carry out is removed or reduced impurity in the seawater, and such as silt, clay, organism, microorganism, mechanical impurity etc., the existence of these impurity has a strong impact on the sea water desaltination treatment effect; As shown in Figure 1, sea water preprocessing unit 10 comprises: settling tank 12, be communicated with raw material seawater suction culvert 41 with settling tank 12 water-ins, be arranged on the former seawater intake pump 11 on the raw material seawater suction culvert 41, and the seawater working shaft 13 that is communicated with the settling tank water outlet.Particularly, former seawater intake pump 11 enters flocculation sedimentation tank 12, through the process of simple dosing, mixing, flocculation, precipitation, clarification, obtains the seawater of preliminary treatment.
It is worth mentioning that in the above-described embodiments, hotting mask coupling seawater desalination system also comprises the lift pump that is arranged on each water-supply line, specifically is well known to those skilled in the art, and is not described in detail here.
In sum, in hotting mask coupling seawater desalination system provided by the invention, utilize steam turbine to drive high-pressure pump work, improved steam utilization, reduce the electric energy that high-pressure pump consumes; Therefore, compared with prior art, adopt hotting mask coupling seawater desalination system provided by the invention to carry out sea water desaltination and process, reduced the energy consumption of hotting mask coupling seawater desalination system, and can improve the seawater rate of recovery.
In addition, in hotting mask coupling seawater desalination system provided by the invention, former seawater is concentrated through reverse osmosis units and the segmentation of low-temperature multi-effect unit, the concentrated seawater of namely discharging from reverse osmosis units does not directly emit, but it is concentrated to offer further steaming method of low-temperature multi-effect unit, thereby improved the seawater rate of recovery.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1. a hotting mask coupling seawater desalination system is characterized in that, comprising: the sea water preprocessing unit, and the reverse osmosis units that is communicated with described sea water preprocessing unit water outlet, the low-temperature multi-effect unit that is communicated with described reverse osmosis units concentrated seawater water outlet, wherein,
Be provided with steam turbine on the steam admission passage of described low-temperature multi-effect unit, and the high pressure pump shaft of described steam turbine and described reverse osmosis units connection.
2. hotting mask coupling seawater desalination system as claimed in claim 1 is characterized in that, described steam turbine is by shaft coupling and described high pressure pump shaft connection.
3. hotting mask coupling seawater desalination system as claimed in claim 2 is characterized in that described high-pressure pump is the multi-stage type high-pressure pump.
4. hotting mask as claimed in claim 1 coupling seawater desalination system is characterized in that described reverse osmosis units also comprises:
Ultrafiltration module, described ultrafiltration module water-in is communicated with described sea water preprocessing unit water outlet, and described ultrafiltration module water outlet is communicated with described high-pressure pump water-in;
Reverse osmosis module, described reverse osmosis module water-in is communicated with described high-pressure pump water outlet;
Energy recycle device, the former seawater water-in of described energy recycle device is communicated with described ultrafiltration module water outlet, the former seawater water outlet of described energy recycle device is communicated with described reverse osmosis module water-in, described energy recycle device concentrated seawater water-in is communicated with described reverse osmosis module concentrated seawater water outlet, and described energy recycle device concentrated seawater water outlet is communicated with described low-temperature multi-effect unit seawater water-in.
5. hotting mask as claimed in claim 1 coupling seawater desalination system, it is characterized in that, described low-temperature multi-effect unit comprises: the multiple-effect evaporator that is communicated with described energy recycle device concentrated seawater outlet, the supplementary heat exchanger that is communicated with the vapour outlet of described multiple-effect evaporator, described supplementary heat exchanger water-in is communicated with described sea water preprocessing unit water outlet, and described supplementary heat exchanger water outlet is communicated with described ultrafiltration module water-in.
6. hotting mask coupling seawater desalination system as claimed in claim 5 is characterized in that described supplementary heat exchanger is tube and shell heat exchanger.
7. hotting mask coupling seawater desalination system as claimed in claim 5 is characterized in that, also comprises: be communicated with the first bypass of described sea water preprocessing unit water outlet and described ultra-filtration equipment water-in, and be arranged on the switch-valve in described the first bypass.
8. such as the arbitrary described hotting mask coupling seawater desalination system of claim 1-7, it is characterized in that, also comprise: the second bypass that two ends are communicated with described steam turbine steam inlet and steam outlet respectively, and be arranged on pressure regulator valve and desuperheater in described the second bypass.
9. hotting mask as claimed in claim 8 coupling seawater desalination system, it is characterized in that, described sea water preprocessing unit comprises: settling tank, be communicated with the raw material seawater suction culvert with described settling tank water-in, be arranged on the former seawater intake pump on the described raw material seawater suction culvert, and the seawater working shaft that is communicated with described settling tank water outlet.
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| CN103408179A (en) * | 2013-08-22 | 2013-11-27 | 天津滨瀚环保科技发展有限公司 | Production method for desalting seawater by hot film coupling |
| CN104355471A (en) * | 2014-10-21 | 2015-02-18 | 北京北控海创科技有限公司 | Novel thermal membrane coupling seawater desalinating system and process |
| CN106986489A (en) * | 2017-05-18 | 2017-07-28 | 北京今大禹环境技术股份有限公司 | A kind of hotting mask couples seawater desalination system |
| CN108002623A (en) * | 2017-11-23 | 2018-05-08 | 中国船舶重工集团公司第七〇九研究所 | A kind of hotting mask couples energy supplying system peculiar to vessel |
| CN111995149A (en) * | 2020-08-18 | 2020-11-27 | 江苏科技大学 | MED and SWRO coupled seawater desalination device system with energy recovery function |
| CN112777833A (en) * | 2021-01-12 | 2021-05-11 | 浙江海盐力源环保科技股份有限公司 | Hot film coupling seawater desalination system with bidirectional feeding adjustment function and control method |
| CN114349195A (en) * | 2022-01-13 | 2022-04-15 | 江苏科技大学 | Marine seawater desalination system considering carbon dioxide recovery and working method |
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| CN111995149A (en) * | 2020-08-18 | 2020-11-27 | 江苏科技大学 | MED and SWRO coupled seawater desalination device system with energy recovery function |
| CN112777833A (en) * | 2021-01-12 | 2021-05-11 | 浙江海盐力源环保科技股份有限公司 | Hot film coupling seawater desalination system with bidirectional feeding adjustment function and control method |
| CN114349195A (en) * | 2022-01-13 | 2022-04-15 | 江苏科技大学 | Marine seawater desalination system considering carbon dioxide recovery and working method |
| CN114349195B (en) * | 2022-01-13 | 2023-06-23 | 江苏科技大学 | Marine seawater desalination system taking carbon dioxide recovery into consideration and working method |
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Inventor after: Guo Huiping Inventor after: Li Xuelei Inventor after: Bai Xinping Inventor after: Ren Kewei Inventor after: Liu Zhichuan Inventor after: Liu Xuezhong Inventor before: Guo Huiping Inventor before: Li Xuelei Inventor before: Bai Xinping Inventor before: Ren Kewei Inventor before: Liu Zhichuan Inventor before: Liu Xuezhong |
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