CN103086451A - A mixed process multi-effect evaporation seawater desalination device - Google Patents

A mixed process multi-effect evaporation seawater desalination device Download PDF

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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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condenser
evaporator
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condensers
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沈胜强
周士鹤
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Dalian University of Technology
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Dalian University of Technology
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination

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Abstract

A multi-effect horizontal pipe falling film evaporation seawater desalination device belongs to the technical field of seawater desalination and heat exchange equipment. Compared with a multi-effect evaporation seawater desalination device with a parallel feeding process, the multi-effect evaporation seawater desalination device with the mixed process can ensure the concentration ratio of the device and the optimal spraying density of each evaporation/condenser, and can improve the water inlet temperature of the single-effect evaporation/condenser and the productivity of the device under the same external preheating condition; compared with the multi-effect evaporation seawater desalination device with the grouped countercurrent feeding process, the device can reduce the salinity of inlet water of the single-effect evaporation/condenser, greatly reduce the risk of scaling of the heat transfer tube bundle, reduce the maintenance workload and reduce the energy consumption of the water pump. Meanwhile, the invention releases the non-condensable gas in the seawater in the last-effect low-temperature evaporation/condenser, and the non-condensable gas does not enter each-effect evaporation/condenser of the high-temperature section, thereby reducing the corrosion of the non-condensable gas to equipment and the adverse effect on heat transfer; the device operation reliability is increased by simplifying the non-condensing gas extraction design.

Description

A kind of mixture length desalting seawater through multi-effect evaporation device
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)

1.一种混合流程多效蒸发海水淡化装置,它包括凝汽器(C)、水泵和蒸发/冷凝器组,其特征在于:所述蒸发/冷凝器组为三个,每个蒸发/冷凝器组包含2-5效蒸发/冷凝器,蒸汽流程由第1效蒸发/冷凝器(E1)向末效蒸发/冷凝器依次流动;所述三个蒸发/冷凝器组的各效蒸发/冷凝器的蒸汽系统依次连接,加热蒸汽依次流过三个蒸发/冷凝器组的各效蒸发/冷凝器后进入凝汽器(C),凝汽器(C)的凝水系统采用管道与淡水泵(P2)和真空泵(P3)连接;海水泵(P1)采用管道与凝汽器(C)、第1水泵(P4)和第3蒸发/冷凝器组(B3)的海水系统依次连接,第3蒸发/冷凝器组(B3)采用管道与第2水泵(P5)、第1蒸发/冷凝器组(B1)、第3水泵(P7)和第2蒸发/冷凝器组(B2)的海水系统依次连接,在第2蒸发/冷凝器组(B2)中末效蒸发/冷凝器的海水系统采用管道与闪蒸罐(F)和浓盐水泵(P8)依次连接,闪蒸罐(F)采用管道与第2蒸发/冷凝器组(B2)中末效蒸发/冷凝器的蒸汽系统连接;所述第1蒸发/冷凝器组(B1)的第1效蒸发/冷凝器(E1)凝水系统采用管道与冷凝水泵(P6)连接,第1蒸发/冷凝器组(B1)其余各效蒸发/冷凝器和第2蒸发/冷凝器组(B2)与第3蒸发/冷凝器组(B3)各效蒸发/冷凝器的凝水系统采用管道以串联方式与淡水泵(P2)连接。 1. A mixed process multi-effect evaporation seawater desalination device, which includes a condenser (C), a water pump and an evaporation/condenser group, characterized in that: there are three evaporation/condenser groups, and each evaporation/condensation The evaporator group includes 2-5 effect evaporators/condensers, and the steam flow flows from the first effect evaporator/condenser (E1) to the last effect evaporator/condenser in sequence; the evaporation/condensation effects of the three evaporator/condenser groups The steam system of the condenser is connected in sequence, and the heating steam flows through each effect evaporator/condenser of the three evaporator/condenser groups in turn and then enters the condenser (C). The condensate system of the condenser (C) adopts pipelines and fresh water pumps (P2) is connected to the vacuum pump (P3); the seawater pump (P1) is connected to the seawater system of the condenser (C), the first water pump (P4) and the third evaporator/condenser group (B3) in sequence through pipes, and the third The evaporator/condenser group (B3) adopts pipelines and the seawater system of the 2nd water pump (P5), the 1st evaporator/condenser group (B1), the 3rd water pump (P7) and the 2nd evaporator/condenser group (B2) in sequence Connection, the seawater system of the final effect evaporator/condenser in the second evaporator/condenser group (B2) is connected with the flash tank (F) and the concentrated brine pump (P8) in turn by pipelines, and the flash tank (F) is connected by pipelines Connected to the steam system of the last effect evaporator/condenser in the second evaporator/condenser group (B2); the condensate system of the first effect evaporator/condenser (E1) of the first evaporator/condenser group (B1) adopt The pipeline is connected to the condensate pump (P6), the other evaporators/condensers of the 1st evaporator/condenser group (B1) and the 2nd evaporator/condenser group (B2) and the 3rd evaporator/condenser group (B3) The condensate system of the evaporator/condenser is connected to the fresh water pump (P2) in series through pipelines. 2.根据权利要求1所述的一种混合流程多效蒸发海水淡化装置,其特征在于:所述蒸发/冷凝器组包含2效蒸发/冷凝器,蒸发/冷凝器组的第1效蒸发/冷凝器(E1)、第2效蒸发/冷凝器(E2)的进料海水采用并行流入方式,所述第1蒸发/冷凝器组(B1)的各效蒸发/冷凝器的海水进水管道上设有采用蒸汽加热的预热器(H),第3蒸发/冷凝器组(B3)的第1效蒸发/冷凝器(E1)的海水进水管道上设有采用蒸汽加热的预热器(H)。 2. A mixed process multi-effect evaporation seawater desalination device according to claim 1, characterized in that: the evaporation/condenser group includes a 2-effect evaporation/condenser, and the first effect evaporation/condenser of the evaporation/condenser group The feed seawater of the condenser (E1) and the second effect evaporator/condenser (E2) adopts a parallel inflow method, and the seawater inlet pipes of each effect evaporator/condenser of the first evaporator/condenser group (B1) are There is a preheater (H) heated by steam, and a preheater ( h). 3.根据权利要求1所述的一种混合流程多效蒸发海水淡化装置,其特征在于:所述蒸发/冷凝器组包含3效蒸发/冷凝器,蒸发/冷凝器组的第1效蒸发/冷凝器(E1)、第2效蒸发/冷凝器(E2)和第3效蒸发/冷凝器(E3)的进料海水采用并行流入方式,所述第1蒸发/冷凝器组(B1)的各效蒸发/冷凝器的海水进水管道上设有采用蒸汽加热的预热器(H),第3蒸发/冷凝器组(B3)的第1效蒸发/冷凝器(E1)、第2效蒸发/冷凝器(E2)的海水进水管道上设有采用蒸汽加热的预热器(H)。 3. A mixed process multi-effect evaporation seawater desalination device according to claim 1, characterized in that: the evaporation/condenser group includes a 3-effect evaporation/condenser, and the first effect evaporation/condenser of the evaporation/condenser group The feed seawater of the condenser (E1), the 2nd effect evaporator/condenser (E2) and the 3rd effect evaporator/condenser (E3) adopts a parallel inflow method, and each of the first evaporator/condenser group (B1) The seawater inlet pipe of the evaporator/condenser is equipped with a preheater (H) heated by steam, the first effect evaporator (E1) of the third evaporator/condenser group (B3), the second effect evaporator / The seawater inlet pipe of the condenser (E2) is provided with a preheater (H) heated by steam.
CN2013100357423A 2013-01-30 2013-01-30 A mixed process multi-effect evaporation seawater desalination device Pending CN103086451A (en)

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CN106145227A (en) * 2016-09-18 2016-11-23 众和海水淡化工程有限公司 A kind of low temperature multi-effect seawater desalting system and desalination method
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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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
CN106145227A (en) * 2016-09-18 2016-11-23 众和海水淡化工程有限公司 A kind of low temperature multi-effect seawater desalting system and desalination method
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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Application publication date: 20130508