CN103086451A - Multi-effect evaporative sea water desalinating device with hybrid process - Google Patents
Multi-effect evaporative sea water desalinating device with hybrid process Download PDFInfo
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- CN103086451A CN103086451A CN2013100357423A CN201310035742A CN103086451A CN 103086451 A CN103086451 A CN 103086451A CN 2013100357423 A CN2013100357423 A CN 2013100357423A CN 201310035742 A CN201310035742 A CN 201310035742A CN 103086451 A CN103086451 A CN 103086451A
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- 238000000034 methods Methods 0.000 title abstract description 12
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- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000012267 brine Substances 0.000 claims description 8
- 239000000203 mixtures Substances 0.000 claims description 7
- 239000007789 gases Substances 0.000 abstract description 7
- 238000005507 spraying Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 230000002411 adverse Effects 0.000 description 5
- 239000007788 liquids Substances 0.000 description 4
- 239000010408 films Substances 0.000 description 3
- 239000012266 salt solutions Substances 0.000 description 3
- 238000005516 engineering processes Methods 0.000 description 2
- 239000011552 falling film Substances 0.000 description 2
- 239000007921 sprays Substances 0.000 description 2
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Classifications
-
- 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
Abstract
The invention discloses a multi-effect evaporative sea water desalinating device with a hybrid process, and belongs to the technical field of sea water desalinating and heat exchange equipment. Compared with the multi-effect evaporative sea water desalinating device with a parallel feeding process, the multi-effect evaporative sea water desalinating device with the hybrid process can ensure the concentration factor of the device and the optimal spraying density of each evaporator/condenser; the water inlet temperature of a single-effect evaporator/condenser can be increased; and the capacity of the device is also improved. Compared with the multi-effect evaporative sea water desalinating device with a grouped reflux feeding process, the water inlet salinity of the single-effect evaporator/condenser can be reduced; the scaling risk of a heat transfer tube is greatly reduced; the maintenance load is reduced; and the energy consumption of a pump is reduced. Meanwhile, non-condensed gas in the sea water is released in a last-effect low-temperature evaporator/condenser; and the non-condensed gas does not enter each-effect evaporator/condenser. Therefore, corrosion of the non-condensed gas on the equipment and adverse effects on heat transfer are reduced; and the operation reliability of the device is increased by simplifying a pumping design of the non-condensed gas.
Description
Technical field
The invention belongs to sea water desaltination and heat-exchange equipment technical field.Relate to a kind of multiple-effect horizontal pipe falling film evaporation sea water desalting plant, particularly a kind ofly comprise that seawater flow process and the existing adverse current of steam flow also have the desalting seawater through multi-effect evaporation device of following current, be i.e. a kind of mixture length desalting seawater through multi-effect evaporation device.
Background technology
At present, existing desalting seawater through multi-effect evaporation device adopts the evaporator/condensers of in-line arrangement in the world, successively backward until the end effect evaporator/condensers, and the charging flow process of seawater is divided into parallel fill-out and grouping adverse current feeding by an effect evaporator/condensers in each heating steam of imitating evaporator/condensers.
In each evaporator/condensers, shell-side charging seawater by the seawater spraying device be sprayed onto horizontally disposed heating surface bank above, seawater flows at the falling liquid film on formation level pipe surface under action of gravity, tube bank outside, seawater is heated in the falling liquid film flow process so that the part evaporation of seawater generates water vapour, i.e. secondary steam.Secondary steam the tube bank between or both sides flow to the tail end of this evaporator/condensers along the pipe parallel direction, the afterbody bobbin carriage of this effect evaporator/condensers communicates with the admission bobbin carriage of next effect evaporator/condensers, steam enters in the pipe of next effect evaporator/condensers, as the thermal source of next effect evaporator/condensers, begin the heat transfer process of next effect.Each is imitated by that analogy, and the main body flow direction that forms shell-side steam is to rear flow by an effect evaporator/condensers.For the parallel fill-out sea water desalinating plant, unevaporated seawater is discharged as strong brine after housing bottom is collected by certain way; For grouping adverse current feeding sea water desalinating plant, at first seawater enters last group evaporator/condensers, the salt solution that this group evaporator/condensers is discharged enters the top of last group of evaporator/condensers through the water water pump, evaporation spray water as evaporator/condensers, until brine sparge to the first group evaporator/condensers, strong brine is discharged by first group of evaporator/condensers, discharger after flasher utilizes the part heat.
The advantage of parallel fill-out mode is that system is simple, but is difficult to satisfy simultaneously evaporator/condensers to seawater spraying density and the requirement of device to concentration ratio, is not suitable for the more sea water desalinating plant of evaporator/condensers effect number; The grouping adverse current can effectively be utilized the temperature difference, but its head imitates evaporator/condensers and face serious scale tendency, for the safe operation of equipment hides some dangers for, has also increased the turnaround of unit workload.
Summary of the invention
The technical problem to be solved in the present invention is to provide the desalting seawater through multi-effect evaporation device of a kind of steam and charging sea water mixing flow process.Its evaporator/condensers adopts the horizontal pipe falling film evaporation technology, steam flow is flowed to the end effect evaporator/condensers successively by an effect evaporator/condensers, but seawater is at first parallel to be entered last and organizes each evaporator/condensers, the salt solution that this group is discharged directly enters first group of evaporator/condensers, then enter successively rear group of evaporator/condensers, until evaporator/condensers, then discharger are organized in inferior end.
Technical scheme of the present invention is: a kind of mixture length desalting seawater through multi-effect evaporation device, it comprises condenser, water pump and evaporator/condensers group, described evaporator/condensers group is three, each evaporator/condensers group comprises 2-5 effect evaporator/condensers, and steam flow is flowed to the end effect evaporator/condensers successively by the 1st effect evaporator/condensers; The steam system of respectively imitating evaporator/condensers of described three evaporator/condensers groups connects successively, heating steam flow through successively three evaporator/condensers groups respectively imitate evaporator/condensers after enter condenser, the condensate system of condenser adopts pipeline to be connected with vacuum pump with fresh water pump; Sea-water pump adopts pipeline to be connected successively with condenser, the 1st water pump and the sea water system of the 3rd evaporator/condensers group, the 3rd evaporator/condensers group adopts pipeline to be connected successively with the sea water system of the 2nd evaporator/condensers group with the 2nd water pump, the 1st evaporator/condensers group, the 3rd water pump, the sea water system of end effect evaporator/condensers adopts pipeline to be connected with the strong brine pump with flash tank to be connected in the 2nd evaporator/condensers group, and flash tank employing pipeline is connected with the steam system of end effect evaporator/condensers in the 2nd evaporator/condensers group; The 1st effect evaporator/condensers condensate system of described the 1st evaporator/condensers group adopts pipeline to be connected with condensate pump, and all the other respectively imitate the 1st evaporator/condensers group evaporator/condensers and be connected with fresh water pump with series system with the condensate system employing pipeline that the 2nd evaporator/condensers group and the 3rd evaporator/condensers group are respectively imitated evaporator/condensers.
Described evaporator/condensers group comprises 2 effect evaporator/condensers, the 1st effect evaporator/condensers of evaporator/condensers group, the charging seawater of the 2nd effect evaporator/condensers adopt parallel inflow mode, the seawater inlet channel of respectively imitating evaporator/condensers of described the 1st evaporator/condensers group is provided with and adopts steam-heated preheater, and the seawater inlet channel of the 1st effect evaporator/condensers of the 3rd evaporator/condensers group is provided with and adopts steam-heated preheater.
Described evaporator/condensers group comprises 3 effect evaporator/condensers, the charging seawater of the 1st effect evaporator/condensers, the 2nd effect evaporator/condensers and the 3rd effect evaporator/condensers of evaporator/condensers group adopts parallel inflow mode, the seawater inlet channel of respectively imitating evaporator/condensers of described the 1st evaporator/condensers group is provided with and adopts steam-heated preheater, and the 1st effect evaporator/condensers of the 3rd evaporator/condensers group, the seawater inlet channel of the 2nd effect evaporator/condensers are provided with and adopt steam-heated preheater.
The invention has the beneficial effects as follows: this mixture length desalting seawater through multi-effect evaporation device is compared with the desalting seawater through multi-effect evaporation device with parallel fill-out flow process, but the best specific liquid rate of the concentration ratio of assurance device and each evaporator/condensers, under the same external preheating condition, can improve the inflow temperature of the first effect evaporator/condensers, improve device capbility; Compare with the desalting seawater through multi-effect evaporation device of grouping adverse current feeding flow process, can reduce the water inlet salinity of the first effect evaporator/condensers, greatly reduce heating surface bank fouling risk, reduce maintenance load, and reduce the water pump energy consumption.Simultaneously, the invention enables the incondensable gas in seawater to discharge in end effect low-temperature evaporation/condenser, incondensable gas does not enter high temperature section and respectively imitates evaporator/condensers, has reduced corrosion and the disadvantageous effect to conduct heat of non-condensable gas gas to equipment; Extract design out by simplifying incondensable gas, increased the device serviceability.
Description of drawings
Fig. 1 is the structural front view of adjacent two-effect evaporation device in same group.
Fig. 2 is the A-A view in Fig. 1.
Fig. 3 is every group two effect mixed flow charging schema of desalting seawater through multi-effect evaporation device.
Fig. 4 is every group of triple effect mixed flow charging schema of desalting seawater through multi-effect evaporation device.
In figure: 1, spray equipment, 2, horizontal heat exchange tube bank, 3, scum dredger, 4, interior end socket, 5, condensate pipe, 6, vapour passage, 7, the afterbody end socket, 8, the admission bobbin carriage; B1, the 1st evaporator/condensers group, B2, the 2nd evaporator/condensers group, B3, the 3rd evaporator/condensers group, C, condenser, E1, the 1st effect evaporator/condensers, E2, the 2nd effect evaporator/condensers, E3, the 3rd effect evaporator/condensers, F, flash tank, H, preheater, P1, sea-water pump, P2, fresh water pump, P3, vacuum pump, P4, the 1st water pump, P5, the 2nd water pump, P6, condensate pump, P7, the 3rd water pump, P8, strong brine pump.
Embodiment
The structure iron of adjacent two-effect evaporation device in Fig. 1,2 shows same group.In figure, the seawater water inlet pipe on tube bank top and seawater spraying device 1 evenly are sprayed onto seawater above tube bank 2, the interbank mobile seawater of falling liquid film that is is managed interior steam heating and is partly evaporated, the water vapour that generates flow to scum dredger 3 along interbank gap, then flow in this effect evaporator/condensers afterbody end socket 7 by vapour passage 6, the afterbody end socket 7 of 1 effect evaporator/condensers is connected with the admission bobbin carriage 8 of 2 effect evaporator/condensers, and the secondary steam that 1 effect evaporator/condensers produces enters the admission tube side of 2 effect evaporator/condensers thus.Steam condensation heat in sprayed sea water outside heating tube in pipe, become the product water in this equipment, condensed water is drained into the steam inlet bobbin carriage bottom of 2 effect evaporator/condensers by the condensate pipe 5 in interior end socket 4, all product waters are collected into 2 effect evaporator/condensers and then are used by this effect discharger.1 effect shell-side unevaporated seawater flows to the equipment bottom, drains into 2 effect evaporator/condensers shell-sides by the U-shaped water shoot of salt solution.
Fig. 3 shows every group two effect mixed flow charging schema of desalting seawater through multi-effect evaporation device.In figure, the evaporator/condensers group is three, and each evaporator/condensers group comprises 2 effect evaporator/condensers, and steam flow is flowed to the 2nd effect evaporator/condensers E2 successively by the 1st effect evaporator/condensers E1.The steam system of respectively imitating evaporator/condensers of three evaporator/condensers groups connects successively, heating steam flow through successively three evaporator/condensers groups respectively imitate evaporator/condensers after enter condenser C, the condensate system of condenser C adopts pipeline to be connected with vacuum pump P3 with fresh water pump P2.Sea-water pump P1 adopts pipeline to be connected successively with condenser C, the 1st water pump P 4 and the sea water system of the 3rd evaporator/condensers group B3, the 3rd evaporator/condensers group B3 adopts pipeline to be connected successively with the sea water system of the 2nd evaporator/condensers group B2 with the 2nd water pump P 5, the 1st evaporator/condensers group B1, the 3rd water pump P 7, the sea water system of the 2nd effect evaporator/condensers E2 adopts pipeline to be connected with strong brine pump P8 with flash tank F to be connected in the 2nd evaporator/condensers group B2, and flash tank F adopts pipeline to be connected with the 2nd steam system of imitating evaporator/condensers E2 in the 2nd evaporator/condensers group B2.The 1st effect evaporator/condensers E1 condensate system of the 1st evaporator/condensers group B1 adopts pipeline to be connected with condensate pump P6, and the condensate system that the 2nd effect evaporator/condensers E2 and the 2nd evaporator/condensers group B2 and the 3rd evaporator/condensers group B3 of the 1st evaporator/condensers group B1 are respectively imitated evaporator/condensers adopts pipeline to be connected with fresh water pump P2 with series system.The 1st effect evaporator/condensers E1 of evaporator/condensers group, the charging seawater of the 2nd effect evaporator/condensers E2 adopt parallel inflow mode, the seawater inlet channel of respectively imitating evaporator/condensers of the 1st evaporator/condensers group B1 is provided with and adopts steam-heated preheater H, and the seawater inlet channel of the 1st effect evaporator/condensers E1 of the 3rd evaporator/condensers group B3 is provided with and adopts steam-heated preheater H.
Fig. 4 shows every group of triple effect mixed flow charging schema of desalting seawater through multi-effect evaporation device.In figure, the evaporator/condensers group is three, and each evaporator/condensers group comprises 3 effect evaporator/condensers, and steam flow is flowed to the 3rd effect evaporator/condensers E3 successively by the 1st effect evaporator/condensers E1.The steam system of respectively imitating evaporator/condensers of three evaporator/condensers groups connects successively, heating steam flow through successively three evaporator/condensers groups respectively imitate evaporator/condensers after enter condenser C, the condensate system of condenser C adopts pipeline to be connected with vacuum pump P3 with fresh water pump P2.Sea-water pump P1 adopts pipeline to be connected successively with condenser C, the 1st water pump P 4 and the sea water system of the 3rd evaporator/condensers group B3, the 3rd evaporator/condensers group B3 adopts pipeline to be connected successively with the sea water system of the 2nd evaporator/condensers group B2 with the 2nd water pump P 5, the 1st evaporator/condensers group B1, the 3rd water pump P 7, the sea water system of the 3rd effect evaporator/condensers E3 adopts pipeline to be connected with strong brine pump P8 with flash tank F to be connected in the 2nd evaporator/condensers group B2, and flash tank F adopts pipeline to be connected with the 3rd steam system of imitating evaporator/condensers E3 in the 2nd evaporator/condensers group B2.The 1st effect evaporator/condensers E1 condensate system of the 1st evaporator/condensers group B1 adopts pipeline to be connected with condensate pump P6, and the 2nd effect evaporator/condensers E2 of the 1st evaporator/condensers group B1, the 3rd effect evaporator/condensers E3 adopt pipeline to be connected with fresh water pump P2 with series system with the condensate system that the 2nd evaporator/condensers group B2 and the 3rd evaporator/condensers group B3 are respectively imitated evaporator/condensers.The 1st effect evaporator/condensers E1, the 2nd effect evaporator/condensers E2 of evaporator/condensers group and the charging seawater of the 3rd effect evaporator/condensers E3 adopt parallel inflow mode, the seawater inlet channel of respectively imitating evaporator/condensers of the 1st evaporator/condensers group B1 is provided with and adopts steam-heated preheater H, and the seawater inlet channel of the 1st effect evaporator/condensers E1, the 2nd effect evaporator/condensers E2 of the 3rd evaporator/condensers group B3 is provided with and adopts steam-heated preheater H.
Claims (3)
1. mixture length desalting seawater through multi-effect evaporation device, it comprises condenser (C), water pump and evaporator/condensers group, it is characterized in that: described evaporator/condensers group is three, each evaporator/condensers group comprises 2-5 effect evaporator/condensers, and steam flow is flowed to the end effect evaporator/condensers successively by the 1st effect evaporator/condensers (E1), the steam system of respectively imitating evaporator/condensers of described three evaporator/condensers groups connects successively, heating steam flow through successively three evaporator/condensers groups respectively imitate evaporator/condensers after enter condenser (C), the condensate system of condenser (C) adopts pipeline and fresh water pump (P2) to be connected P3 with vacuum pump) be connected, sea-water pump (P1) adopts pipeline and condenser (C), the 1st water pump (P4) connects successively with the sea water system of the 3rd evaporator/condensers group (B3), the 3rd evaporator/condensers group (B3) adopts pipeline and the 2nd water pump (P5), the 1st evaporator/condensers group (B1), the 3rd water pump (P7) connects successively with the sea water system of the 2nd evaporator/condensers group (B2), the sea water system of end effect evaporator/condensers adopts pipeline to be connected P8 with the strong brine pump with flash tank (F) in the 2nd evaporator/condensers group (B2)) be connected successively, flash tank (F) adopts pipeline to be connected with the steam system of end effect evaporator/condensers in the 2nd evaporator/condensers group (B2), the 1st effect evaporator/condensers (E1) condensate system of described the 1st evaporator/condensers group (B1) adopts pipeline to be connected with condensate pump (P6), and all the other respectively imitate the 1st evaporator/condensers group (B1) evaporator/condensers and be connected with fresh water pump (P2) with series system with the condensate system employing pipeline that the 2nd evaporator/condensers group (B2) and the 3rd evaporator/condensers group (B3) are respectively imitated evaporator/condensers.
2. a kind of mixture length desalting seawater through multi-effect evaporation device according to claim 1, it is characterized in that: described evaporator/condensers group comprises 2 effect evaporator/condensers, the 1st effect evaporator/condensers (E1) of evaporator/condensers group, the charging seawater of the 2nd effect evaporator/condensers (E2) adopts parallel inflow mode, the seawater inlet channel of respectively imitating evaporator/condensers of described the 1st evaporator/condensers group (B1) is provided with and adopts steam-heated preheater (H), the seawater inlet channel of the 1st effect evaporator/condensers (E1) of the 3rd evaporator/condensers group (B3) is provided with and adopts steam-heated preheater (H).
3. a kind of mixture length desalting seawater through multi-effect evaporation device according to claim 1, it is characterized in that: described evaporator/condensers group comprises 3 effect evaporator/condensers, the 1st effect evaporator/condensers (E1) of evaporator/condensers group, the charging seawater of the 2nd effect evaporator/condensers (E2) and the 3rd effect evaporator/condensers (E3) adopts parallel inflow mode, the seawater inlet channel of respectively imitating evaporator/condensers of described the 1st evaporator/condensers group (B1) is provided with and adopts steam-heated preheater (H), the 1st effect evaporator/condensers (E1) of the 3rd evaporator/condensers group (B3), the seawater inlet channel of the 2nd effect evaporator/condensers (E2) is provided with and adopts steam-heated preheater (H).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106178566A (en) * | 2016-08-31 | 2016-12-07 | 浙江中机环保科技股份有限公司 | A kind of two effect formula horizontal tube falling film vapor recompression vaporizers |
| CN109231323A (en) * | 2018-11-09 | 2019-01-18 | 浙江海盐力源环保科技股份有限公司 | A kind of seawater desalination system of cyclone type spray |
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| US3966562A (en) * | 1974-07-31 | 1976-06-29 | Agency Of Industrial Science & Technology | Multi-stage flash distillation plant |
| CN201033743Y (en) * | 2007-02-13 | 2008-03-12 | 华北电力大学 | Membrane shell type multiple-effect membrane-reduction distillation sea-water distillator |
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| CN201033743Y (en) * | 2007-02-13 | 2008-03-12 | 华北电力大学 | Membrane shell type multiple-effect membrane-reduction distillation sea-water distillator |
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| CN106178566A (en) * | 2016-08-31 | 2016-12-07 | 浙江中机环保科技股份有限公司 | A kind of two effect formula horizontal tube falling film vapor recompression vaporizers |
| CN109231323A (en) * | 2018-11-09 | 2019-01-18 | 浙江海盐力源环保科技股份有限公司 | A kind of seawater desalination system of cyclone type spray |
| CN109231323B (en) * | 2018-11-09 | 2021-07-09 | 浙江海盐力源环保科技股份有限公司 | Cyclone-type spraying seawater desalination system |
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