CN1546386A - Method and device for desalting sea water using mechanical compression distillation method - Google Patents
Method and device for desalting sea water using mechanical compression distillation method Download PDFInfo
- Publication number
- CN1546386A CN1546386A CNA2003101075577A CN200310107557A CN1546386A CN 1546386 A CN1546386 A CN 1546386A CN A2003101075577 A CNA2003101075577 A CN A2003101075577A CN 200310107557 A CN200310107557 A CN 200310107557A CN 1546386 A CN1546386 A CN 1546386A
- Authority
- CN
- China
- Prior art keywords
- effect evaporator
- effect
- sea water
- evaporator
- seawater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013535 sea water Substances 0.000 title claims abstract description 138
- 238000004821 distillation Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000006835 compression Effects 0.000 title claims abstract description 8
- 238000007906 compression Methods 0.000 title claims abstract description 8
- 238000011033 desalting Methods 0.000 title claims description 36
- 239000013505 freshwater Substances 0.000 claims abstract description 48
- 238000009833 condensation Methods 0.000 claims abstract description 43
- 230000005494 condensation Effects 0.000 claims abstract description 41
- 230000000694 effects Effects 0.000 claims abstract description 34
- 238000001704 evaporation Methods 0.000 claims abstract description 28
- 230000008020 evaporation Effects 0.000 claims abstract description 27
- 239000006260 foam Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 239000006200 vaporizer Substances 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 238000007701 flash-distillation Methods 0.000 claims description 3
- 230000003319 supportive effect Effects 0.000 claims description 3
- -1 sprinkling system Substances 0.000 claims description 2
- 238000010612 desalination reaction Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 5
- 238000005507 spraying Methods 0.000 abstract 1
- 239000007921 spray Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical group O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 239000012267 brine Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
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
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a sea-water distillation apparatus by mechanical compression distillation method which comprises a steam mechanical compressor, a plurality of evaporators and condensation tubes, spraying systems, fresh water tanks and foam trapping nets arranged in the evaporator, wherein the exit of the steam mechanical compressor is connected with the condensation tube in the first evaporator in the multiple evaporators, the condensation tube in the first evaporator is connected with the fresh water tank, the vapor exit of the first evaporator is connected with the condensation tube in the next evaporator, and so on, until the last evaporator, thus multiple effect step by step evaporation is realized by the various evaporators. The invention also discloses a process for sea water desalination by using the sea-water distillator.
Description
Technical field
The present invention relates to a kind of sea water desalinating plant and method thereof, especially relate to a kind of fresh water device for making and method by seawater vaporization and condensation.
Background technology
The distillation sea water desalting technology is a distillatory process, and promptly the vapor condensation that the seawater heating evaporation is come out by distillation is made fresh water, and simultaneously with the spissated process of seawater.
The sea water desaltination distillating method mainly contains multistage flash evaporation and two kinds of processing methodes of multi-effect distilling.Wherein, multistage flash evaporation is to utilize steam with seawater preheating earlier, and step-down step by step then makes the seawater rapid evaporation and obtains the desalination process of fresh water.Multi-effect distilling is to utilize steam to make seawater multiple-effect evaporation and obtain the desalination process of fresh water step by step outside prolong at the condensation in-tube condensation.
At present, utilize the sea water desalinating plant of multistage flash evaporation method and multi-effect distilling method, all can not make full use of the heat energy of heating steam, thereby limited the reduction Cost of seawater desalination; In addition, there is not the area of steam source can't adopt two kinds of above-mentioned sea water desaltination distil process methods at some at all.
Summary of the invention
The invention provides device and method for desalting seawater thereof that a kind of efficient, energy-conservation mechanically compress distillation method makes sea water desaltination, the present invention is by organically in conjunction with multi-effect distilling with utilize two kinds of technology of vapour compression of mechanical compressor, and then utilize the heat energy of steam fully, improve the thermo-efficiency of sea water desalinating plant, reduce Cost of seawater desalination.Utilize sea water desalinating plant of the present invention to carry out sea water desaltination, can be used for only providing the occasion of electric energy, and the problem of having avoided filtration, burn into chemical treatment and fouling to be produced.
In order to solve the problems of the technologies described above, the technical scheme of mechanically compress distillation sea water desalting device of the present invention is to comprise the steam mechanical compressor, a plurality of vaporizers and the prolong that places in the described vaporizer, sprinkling system, fresh-water tank and catch the foam net, prolong in first single-effect evaporator in the outlet of described steam mechanical compressor and the described a plurality of vaporizers is connected, prolong in described first single-effect evaporator is connected with fresh-water tank, prolong in the vapour outlet of described first single-effect evaporator and the following 1st effective evaporator is connected, by that analogy, to the last single-effect evaporator, above-mentioned a plurality of vaporizer is realized the multiple-effect stepped evaporation, the vapour outlet of described the last single-effect evaporator is connected with described mechanical compressor suction port, the secondary steam that the last single-effect evaporator produces is transported in the first single-effect evaporator interior condenser tube after described mechanical compressor compression improves temperature and pressure.
Also comprise in the sea water desalinating plant of the present invention respectively with each single-effect evaporator in the condensation mixing tank that is connected with the condensation tube bank of fresh-water tank, and the electric boiler that is connected with water outlet, reach plate-type heat exchanger.Described fresh-water tank is by taking over and the vacuum interface that draws gas links to each other, and the described vacuum interface that draws gas is connected with vacuum pump.The shrouding of described each vaporizer and tube sheet form an integral body, guarantee that interior tube side of vaporizer and shell side form mutual disjunct separate space.Described prolong is equilateral triangle to be arranged, and its two ends are connected with tube sheet respectively, and the centre is provided with back up pad, and described tube sheet and back up pad play a supportive role to prolong.The impeller of described mechanical vapour compressor is the radially 3 d impeller of height ratio work factor, and the setting angle of its rotating speed and vane diffuser is adjustable, and described mechanical vapour compressor adopts double mechanical seal.The fresh-water tank of described each single-effect evaporator is connected with vacuum pump respectively, to extract non-condensable gases, guarantees the negative pressure state in the described vaporizer simultaneously.Every single-effect evaporator is equipped with catches the foam net, catching the foam net links to each other with the inboard of evaporator shell, the described foam net of catching is double-deck V shaped slab structure, the catching the foam net and can remove drop in the steam largely of v-shaped structure, guarantee the water quality of water of condensation, simultaneously to catch the foam device than routine little for the drag losses of steam, thereby improve the efficient of desalting plant.
The method of utilizing mechanically compress distillation sea water desalting device of the present invention to carry out sea water desaltination may further comprise the steps: step 1, at first, connect above-mentioned mechanically compress distillation and send out sea water desalinating plant, promptly, at the multiple-effect distillation device of the routine mechanical vapour compressor of connecting, described mechanical vapour compressor is arranged between first effect and the most last effect of described multiple-effect evaporator, condensation tube bank in the relief outlet of described mechanical vapour compressor and described first single-effect evaporator is connected, and the vapour outlet of described last evaporator is connected with the suction port of described mechanical vapour compressor; Fresh-water tank in the described multiple-effect distillation device is connected with vacuum pump by taking over; Step 2, connect above-mentioned sea water desalinating plant after, start described sea water desalinating plant, under the effect of vacuum pump, the inner negative pressure state that keeps of each single-effect evaporator, and the temperature difference between the adjacent two-effect evaporation device is controlled at 1.5 ℃ ~ 6 ℃, and the pressure in every single-effect evaporator is the steam saturation pressure of temperature correspondence separately; Step 3, in the steam of mechanical vapour compressor compresses enters the condensation tube bank of first single-effect evaporator, seawater is sprayed onto the surface of condensation tube bank by sprinkling system, steam is condensed into fresh water and flows in the fresh-water tank in prolong, can collect then and obtain fresh water; The secondary steam that first single-effect evaporator produces enters in second single-effect evaporator after the foam net is removed the sea water drops of carrying secretly by catching, and final, the seawater that is concentrated is discharged to outside the vaporizer by the concentrated seawater outlet; The rest may be inferred, to the last single-effect evaporator; Step 4, secondary steam that the last single-effect evaporator the produced suction port by the mechanical vapour compressor enters in the mechanical vapour compressor heats, pressurizes, circulation step three; That is, further low-grade steam is become the continuous evaporation that higher-grade steam is used to keep seawater by mechanical energy.
In method for desalting seawater of the present invention, redundance after the concentrated seawater that enters each single-effect evaporator in the described multiple-effect evaporator is evaporated, rely on adjacent two pressure differences of imitating, flow in one effect of back by last effect by the circulating seawer interface, flow into the concentrated seawater generation flash distillation of imitating back one and mix with the concentrated seawater that imitates back one, mixed concentrated seawater and charging seawater are recycled pump and extract out after recycle pump mixes, and the sprinkling system of distributing to described two-effect evaporation device is to provide further evaporation.
Compared with prior art, mechanically compress distillation sea water desalting device of the present invention has following beneficial effect:
1. in mechanically compress distillation sea water desalting device of the present invention, because mechanical compressor is a main thermal source of keeping this device running, its effect is to convert electrical energy into mechanical energy, by mechanical energy low-grade steam is become the continuous evaporation that higher-grade steam is used to keep seawater, have obvious energy-saving effect;
2. owing in mechanically compress distillation sea water desalting device of the present invention, adopted the condensation mixing tank had been installed, prolonged the life-span of device interior condenser tube before recycle pump, thus the work-ing life of having improved single unit system;
3. mechanically compress distillation sea water desalting method of the present invention has adopted strong brine part circulated sprinkling, has improved plant efficiency.
4. mechanically compress distillation sea water desalting devices and methods therefor of the present invention is suitable in the area that does not have steam source seawater or brackish water being desalinated.
Description of drawings
Fig. 1 is the workflow diagram of mechanically compress distillation sea water desalting device of the present invention;
Fig. 2 is that invention mechanically compress distillation sea water desalting device is the schema that example is carried out sea water desaltination with two effect distillations
First single-effect evaporator structural representation when Fig. 3 is imitated distillation for mechanically compress distillation sea water desalting device two of the present invention;
Second single-effect evaporator structural representation when Fig. 4 is imitated distillation for mechanically compress distillation sea water desalting device two of the present invention.
Be the explanation of main Reference numeral in the Figure of description of the present invention below.
1---sea intake pipe 2---shrouding
3,6--- tube sheet 4,5---back up pad
7---shell 8---circulating seawer interface
9---circulating seawer outlet 10---vacuum interface that draws gas
11---concentrated seawater interchanger 12---product (fresh water) interchanger
100---mechanical vapour compressors 200---, first single-effect evaporator
201---condensation tube bank 202---sprinkling system
203---fresh-water tanks 204---are caught the foam net
300---condensation mixing tank 400---vacuum pump
410---product (fresh water) water pump 420---recycle pump
430---concentrated seawater pump 440---sea-water pump
500---second single-effect evaporator 600---last evaporator
901---seawater water-in 902---water outlet
903---concentrated seawater outlet 904---electric boiler
905---system's concentrated seawater discharge outlet 906---system product (fresh water) water outlet
Embodiment
Below in conjunction with accompanying drawing the present invention is done to describe in further detail.
As shown in Figures 1 to 4, mechanically compress distillation sea water desalting device of the present invention comprises steam mechanical compressor 100, a plurality of vaporizers 200,500 and 600, and place the condensation in described each vaporizer to restrain 201, sprinkling system 202, fresh-water tank 203 and catch foam net 204, being positioned at condensation restrains the sprinkling system 202 of 201 tops and links to each other with sea intake 901 by taking over, condensation tube bank 201 in first single-effect evaporator 200 in the outlet of described steam mechanical compressor 100 and the described a plurality of vaporizers is connected, condensation in described first single-effect evaporator 200 tube bank 201 is connected with fresh-water tank 203, the vapour outlet of described first single-effect evaporator 200 and following 1st effective evaporator, for example connect in the two condensation tube banks of imitating second single-effect evaporator 500 in the distillation, by that analogy, to the last single-effect evaporator 600, above-mentioned a plurality of vaporizer is realized the multiple-effect stepped evaporation, the vapour outlet of described the last single-effect evaporator 600 is connected with the suction port of described mechanical compressor 100, the secondary steam that the last single-effect evaporator 600 produces is transported in first single-effect evaporator, the 200 interior condenser tube bundles 201 after described mechanical compressor 100 compressions improve temperature and pressure.
As shown in Figure 2, also comprise in the sea water desalinating plant of the present invention respectively with each single-effect evaporator in fresh-water tank 203 and the condensation tube bank 201 condensation mixing tanks 300 that are connected, and the electric boiler 904 that is connected with water outlet 902, reach the concentrated seawater interchanger 11 and product water (fresh water) interchanger 12 of plank frame.Described fresh-water tank 203 is by taking over and the vacuum interface that draws gas links to each other, and the described vacuum interface that draws gas is connected with vacuum pump 400, with the extraction non-condensable gases, guarantees the negative pressure state that described vaporizer is interior simultaneously.Shrouding 2 as each vaporizer as described in Fig. 3 and Fig. 4 forms an integral body with two ends tube sheet 3 and 6, guarantees that with this tube side and shell side form mutual disjunct separate space in vaporizer.Described prolong 201 is equilateral triangle to be arranged, and its two ends are connected with tube sheet 3 and 6 respectively, and the centre is provided with back up pad 4 and 5, described tube sheet 3 and 6 and back up pad 4 and 5 pairs of prolongs 201 play a supportive role.The impeller of described mechanical vapour compressor 100 is the radially 3 d impeller of height ratio work factor, and the setting angle of its rotating speed and vane diffuser is adjustable, and described mechanical vapour compressor 100 adopts double mechanical seal.The side of every single-effect evaporator is equipped with catches foam net 204, catching foam net 204 links to each other with the inboard of evaporator shell 7, the described foam net 204 of catching is double-deck V shaped slab structure, the catching foam net 204 and can remove drop in the steam largely of v-shaped structure, guarantee the water quality of water of condensation, simultaneously to catch the foam device than routine little for the drag losses of steam, thereby improve the efficient of desalting plant.
As depicted in figs. 1 and 2, in the mechanically compress distillation sea water desalting device of the present invention in first single-effect evaporator 200, steam through mechanically compress enters from the left side in the condensation tube bank 201 of first single-effect evaporator 200, seawater is sprayed onto the surface of condensation tube bank 201 by sprinkling system 202, because the temperature that enters steam in the prolong 201 is than the seawater temperature height of spray, steam will be condensed into fresh water in prolong 201, and flow automatically in the fresh-water tank 203, be transported to outside the vaporizer by water outlet 902 then.In addition, evaporation produces saturated secondary steam under the effect of the seawater that sprays prolong 201 outside surfaces vapor condensation heat release in pipe, and secondary steam enters next single-effect evaporator after by the sea water drops of catching 204 removals of foam net and carrying secretly, promptly in second single-effect evaporator.Finally, the seawater that is concentrated is discharged outside the vaporizer by concentrated seawater outlet 903.The principle of work of second single-effect evaporator 500 and first single-effect evaporator 200 are basic identical, difference only is that the heating steam of second single-effect evaporator 500 derives from the secondary steam that first single-effect evaporator 200 is produced, the secondary steam that second single-effect evaporator 500 produces is transported to third effect evaporator, by that analogy, the principle of work of each single-effect evaporator of back and second single-effect evaporator 500 are basic identical.The secondary steam that the last single-effect evaporator 600 produces enters the suction port of mechanical vapour compressor 100, and the venting port of mechanical vapour compressor links to each other with first single-effect evaporator, 201 interior condenser tube bundles 201.
For convenience of explanation, be workflow and the implementation method that example is described mechanically compress distillation sea water desalting device of the present invention with one two device of imitating below, but mechanically compress distillation sea water desalting device of the present invention is not limited to two effects.
As shown in Figure 2, mechanically compress distillation sea water desalting device of the present invention is mainly by first single-effect evaporator 200, second single-effect evaporator 500, sea-water pump 440, concentrated seawater interchanger 11, product water (fresh water) interchanger 12, condensation mixing tank 300, recycle pump 420, product water (fresh water) pump 410, concentrated seawater pump 430, electric boiler 904, compositions such as vacuum pump 400 and mechanical vapour compressor 100.As shown in Figure 3 and Figure 4, the main composition member of each single-effect evaporator has water outlet 902, seawater water inlet pipe 1, circulating seawer interface 8, vacuum draw gas interface 10, shrouding 2, tube sheet 3 and 6, back up pad 4 and 5, fresh-water tank 203, prolong 201, shell 7, catches foam net 204 and sprinkling system 202.In addition, each single-effect evaporator of other except that first single-effect evaporator also has concentrated seawater outlet 903 and circulating seawer outlet 9.
Below in conjunction with Fig. 1 and Fig. 2 the principle of work of mechanically compress distillation sea water desalting device of the present invention is further described: under the effect of vacuum pump 400, the inner negative pressure state that keeps of each single-effect evaporator.In vaporizer inside, the temperature height of first single-effect evaporator 200 is 65～75 ℃, and the temperature of second single-effect evaporator 500 is low, is 63.5～73.5 ℃.Keep 1.5 ℃～6 ℃ the temperature difference between two effects.Two pressure of imitating are the steam saturation pressure of temperature correspondence separately.
In first single-effect evaporator 200, the steam of mechanical vapour compressor 100 relief outlets enters from the left side in the pipe of prolong 201 of vaporizer.One end of prolong 201 links to each other with tube sheet 3, and the other end links to each other with tube sheet 6.Seawater is sprayed onto the surface of prolong 201 by sprinkling system 202.Because the temperature that enters the steam in the prolong 201 is than the temperature height of the seawater of spray, steam will be condensed into fresh water in prolong 201, and will flow automatically in the fresh-water tank 203, be transported to outside first single-effect evaporator 200 by water outlet 902 then.Evaporation produces saturated secondary steam under the effect of the seawater that sprays prolong 201 outside surfaces vapor condensation heat release in pipe, and secondary steam enters second single-effect evaporator 500 after by the sea water drops of catching 204 removals of foam net and carrying secretly.The seawater that is concentrated flows into second single-effect evaporator 500 by circulating seawer interface 8 depended on pressure differences.The heating steam of second single-effect evaporator 500 derives from the secondary steam that first single-effect evaporator 200 is produced, and the secondary steam that second single-effect evaporator 500 produces is transported to first single-effect evaporator 200 after 100 compressions of mechanical vapour compressor improve temperature and pressure.Vacuum pump 400 in the system links to each other with the fresh-water tank 201 of each single-effect evaporator, to extract non-condensable gases, guarantees the negative pressure state in the vaporizer simultaneously.
Raw material seawater is transported to product water (fresh water) interchanger 12 and concentrated seawater interchanger 11 by sea-water pump 440.The heat that product water that raw material seawater is discharged and concentrated seawater heating are taken out of with recovery.In leading to the process of vaporizer, feed water is further heated in condensation mixing tank 300 and outgases, be removed heavy metal ion simultaneously, the feed water that is heated and outgases is mixed with concentrated seawater from second single-effect evaporator 500 at the suction port place of recycle pump 420, and be discharged in the 2nd effect evaporator 500 by sprinkling system 202, form the successive thin water film on the heat-transfer pipe of vaporizer, thin water film is heated evaporation and produces secondary steam and concentrated seawater.The secondary steam that evaporation is produced in second single-effect evaporator 500 enters mechanical vapour compressor 100 by after catching foam net removal droplets entrained.Be discharged in the prolong 201 of first single-effect evaporator 200 through mechanical vapour compressor 100 its pressure of compression and after improving temperature.The pressure of prolong 201 interior steam is a little more than the vapor-liquid equilibrium pressure of first single-effect evaporator, 200 prolongs, 201 outer concentrated seawaters at this moment, steam is condensed, emit condensation latent heat and pass to mobile concentrated seawater outside pipe, thereby provide latent heat for the evaporation of concentrated seawater in first single-effect evaporator 200 by tube wall.
Because the pressure in first single-effect evaporator 200 is greater than the pressure in second single-effect evaporator 500, the difference of temperature and pressure makes the steam of evaporation in first effect enter into second prolong of imitating by catching the foam net, condensation latent heat passes at the outer mobile strong brine of pipe by tube wall, and the concentrated seawater that makes second effect is evaporated and produces secondary steam.
Redundance after the concentrated seawater that enters first single-effect evaporator 200 is evaporated, by two pressure differences of imitating, flow in second effect by first effect by circulating seawer interface 9, because the pressure difference between two effects, flow into the second concentrated seawater generation flash distillation of imitating and mixes, mix concentrated seawater is recycled pump 20 extractions with the charging seawater and distributes to vaporizer two effects after recycle pump 420 suction ports mix sprinkling system 202 so that further evaporation to be provided with second concentrated seawater of imitating.In addition, the unnecessary concentrated seawater in second effect is extracted out by concentrated seawater pump 430 by concentrated seawater outlet 903, and passes through concentrated seawater interchanger 11 heat transferred charging seawater.The product water (fresh water) that produces in first effect is introduced in the electrically heated side of electric boiler 904, and redundance overflows to the liquid storage side, and the second product water (fresh water) of imitating is introduced in the liquid storage side of electric boiler 904.Product water (fresh water) pump 410 draws water from the liquid storage side of electric boiler 904, passes through product water (fresh water) interchanger 12 again heat transferred charging seawater.
Air and other non-condensable gases are drawn out of from the fresh-water tank 204 of vaporizer with the form of air and vapour mixture, this mixture at first concentrates non-condensable gas by condensation portion steam in condensation mixing tank 300, then, vacuum pump 400 is extracted this non-condensable gas out.Except that extracting out the non-condensable gas in operating process, this vacuum pump 400 also produces initial vacuum in apparatus of the present invention start-up course.
As shown in Figure 2, among the present invention, recycle pump 420 is installed, its objective is the increase spray flux, thereby prevent to cause the dried wall of heat-transfer pipe to cause the heat-transfer pipe fouling, simultaneously, strengthen the raising that spray flux helps heat transfer efficiency, improved plant efficiency owing to spray is uneven.
In addition, between sea-water pump 410 and recycle pump 420, a mixing condenser 300 is installed.Its effect is the steam that condensation deflates and carried secretly during other non-condensable gases, sloughs the dissolved gas in the charging seawater simultaneously and removes heavy metal ion in the seawater, slows down the corrosion of seawater to prolong in the device.Condensation mixing tank 300 is made up of shell and its inner filler.Filler can be selected the Raschig ring filler of fine aluminium or aluminium alloy etc. for use, and its material should be more active than the metal of prolong 201.Water outlet to mixing condenser 300 is monitored, when the clearance of heavy metal ion less than 80% the time, change filler.This shows, condensation mixing tank 300 was installed before recycle pump 420, prolonged the life-span of device interior condenser tube.
In sea water desalinating plant of the present invention, electric boiler 904 is installed, its effect is the initial heating vapour source when producing steam and starting as device, and the thermosteresis that supplementary device causes because of heat radiation when operation, simultaneously, portion is provided with dividing plate within it, and a side is a heated side, and opposite side is as the liquid storage side of product water.
Be provided with two interchanger among the present invention, i.e. concentrated seawater interchanger 11 and product water (fresh water) interchanger 12, its effect is to reclaim the strong brine of discharging and the heat of product water, reduces the calorific loss of device.
As shown in Figure 3 and Figure 4, the internal structure of each single-effect evaporator is basic identical among the present invention.The cylinder that the shell 7 of vaporizer is made for carbon steel uses flange to connect between each single-effect evaporator.Shrouding 2 forms an integral body with tube sheet 3 and 6, guarantees that interior tube side of vaporizer and shell side form mutual disjunct separate space.
The impeller of mechanical vapour compressor 100 is the radially 3 d impeller of height ratio work factor, and rotating speed and vane diffuser setting angle are adjustable, adopts double mechanical seal.
In sum, the present invention combines the advantage of multiple-effect distillation sea water desalting technology and multistage flash evaporation desalination process, has used mechanical vapour compressor and the interchanger that is used for heat recuperation, has improved water production rate, thereby has reduced the energy consumption of device.
The present invention is suitable for not having the area of steam source that seawater or brackish water are desalinated.
Although invention has been described in conjunction with the accompanying drawings above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of distortion, these all belong within the protection of the present invention.
Claims (10)
1. mechanically compress distillation sea water desalting device, comprise a plurality of vaporizers and place the interior prolong of described vaporizer, sprinkling system, fresh-water tank and catch the foam net, it is characterized in that: also comprise the steam mechanical compressor, prolong in first single-effect evaporator in the outlet of described steam mechanical compressor and the described a plurality of vaporizers is connected, prolong in described first single-effect evaporator is connected with fresh-water tank, prolong in the vapour outlet of described first single-effect evaporator and the following 1st effective evaporator is connected, by that analogy, to the last single-effect evaporator, above-mentioned a plurality of vaporizer is realized the multiple-effect stepped evaporation, the vapour outlet of described the last single-effect evaporator is connected with described mechanical compressor suction port, the secondary steam that the last single-effect evaporator produces is transported in the first single-effect evaporator interior condenser tube after described mechanical compressor compression improves temperature and pressure.
2. mechanically compress distillation sea water desalting device according to claim 1 is characterized in that: also comprise respectively with each single-effect evaporator in the condensation mixing tank that is connected with the condensation tube bank of fresh-water tank, and the electric boiler that is connected with water outlet, reach plate-type heat exchanger.
3. mechanically compress distillation sea water desalting device according to claim 1 is characterized in that: described fresh-water tank is by taking over and the vacuum interface that draws gas links to each other, and the described vacuum interface that draws gas is connected with vacuum pump.
4. mechanically compress distillation sea water desalting device according to claim 1 is characterized in that: the shrouding of described each vaporizer and tube sheet form an integral body, guarantee that interior tube side of vaporizer and shell side form mutual disjunct separate space.
5. mechanically compress distillation sea water desalting device according to claim 1 is characterized in that: described prolong is equilateral triangle to be arranged, and its two ends are connected with tube sheet respectively, and the centre is provided with back up pad, and described tube sheet and back up pad play a supportive role to prolong.
6. mechanically compress distillation sea water desalting device according to claim 1, it is characterized in that: the impeller of described mechanical vapour compressor is the radially 3 d impeller of height ratio work factor, the setting angle of its rotating speed and vane diffuser is adjustable, and described mechanical vapour compressor adopts double mechanical seal.
7. mechanically compress distillation sea water desalting device according to claim 1, it is characterized in that: the fresh-water tank of described each single-effect evaporator is connected with vacuum pump respectively, to extract non-condensable gases, guarantees the negative pressure state in the described vaporizer simultaneously.
8. mechanically compress distillation sea water desalting device according to claim 1 is characterized in that: the described foam net of catching is double-deck V shaped slab structure.
9. method of utilizing mechanically compress distillation sea water desalting device according to claim 1 to carry out sea water desaltination is characterized in that:
Described method for desalting seawater may further comprise the steps:
Step 1, at first, connect above-mentioned mechanically compress distillation and send out sea water desalinating plant, promptly, at the multiple-effect distillation device of the routine mechanical vapour compressor of connecting, described mechanical vapour compressor is arranged between first effect and the most last effect of described multiple-effect evaporator, condensation tube bank in the relief outlet of described mechanical vapour compressor and described first single-effect evaporator is connected, and the vapour outlet of described last evaporator is connected with the suction port of described mechanical vapour compressor; Fresh-water tank in the described multiple-effect distillation device is connected with vacuum pump by taking over;
Step 2, connect above-mentioned sea water desalinating plant after, start described sea water desalinating plant, under the effect of vacuum pump, the inner negative pressure state that keeps of each single-effect evaporator, and the temperature difference between the adjacent two-effect evaporation device is controlled at 1.5 ℃～6 ℃, and the pressure in every single-effect evaporator is the steam saturation pressure of temperature correspondence separately;
Step 3, in the steam of mechanical vapour compressor compresses enters the condensation tube bank of first single-effect evaporator, seawater is sprayed onto the surface of condensation tube bank by sprinkling system, steam is condensed into fresh water and flows in the fresh-water tank in prolong, can collect then and obtain fresh water; The secondary steam that first single-effect evaporator produces enters in second single-effect evaporator after the foam net is removed the sea water drops of carrying secretly by catching, and final, the seawater that is concentrated is discharged to outside the vaporizer by the concentrated seawater outlet; The rest may be inferred, to the last single-effect evaporator;
Step 4, secondary steam that the last single-effect evaporator the produced suction port by the mechanical vapour compressor enters in the mechanical vapour compressor heats, pressurizes, circulation step three; That is, further low-grade steam is become the continuous evaporation that higher-grade steam is used to keep seawater by mechanical energy.
10. according to the described a kind of method for desalting seawater of claim 9, it is characterized in that: the redundance after the concentrated seawater that enters each single-effect evaporator in the described multiple-effect evaporator is evaporated, rely on adjacent two pressure differences of imitating, flow in one effect of back by last effect by the circulating seawer interface, flow into the concentrated seawater generation flash distillation of imitating back one and mix with the concentrated seawater that imitates back one, mixed concentrated seawater and charging seawater mix the year after next, are recycled pump and extract out through recycle pump, and the sprinkling system of distributing to described two-effect evaporation device is to provide further evaporation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101075577A CN1546386A (en) | 2003-12-16 | 2003-12-16 | Method and device for desalting sea water using mechanical compression distillation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101075577A CN1546386A (en) | 2003-12-16 | 2003-12-16 | Method and device for desalting sea water using mechanical compression distillation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1546386A true CN1546386A (en) | 2004-11-17 |
Family
ID=34334391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101075577A Pending CN1546386A (en) | 2003-12-16 | 2003-12-16 | Method and device for desalting sea water using mechanical compression distillation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1546386A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780988B (en) * | 2009-12-30 | 2013-01-16 | 中国第一重型机械股份公司 | Novel sea water desalinization evaporator |
| CN103011480A (en) * | 2012-10-17 | 2013-04-03 | 李毅 | Multi-effect wastewater desalination device |
| CN103073142A (en) * | 2013-01-11 | 2013-05-01 | 中国电子工程设计院 | Multiple-effect-group, low-temperature and multiple-effect distilled seawater desalination system |
| CN103265089A (en) * | 2013-05-07 | 2013-08-28 | 西安交通大学 | High temperature high efficiency multi-effect seawater distillation desalination apparatus and method |
| CN103908788A (en) * | 2012-12-31 | 2014-07-09 | 中国科学院理化技术研究所 | MVR heat pump evaporation system |
| CN103908789A (en) * | 2014-04-02 | 2014-07-09 | 江苏科化节能环保设备有限公司 | MVR (mechanical vapor recompression) heat pump vaporization system for accelerating to start up by adopting energy accumulation water tank |
| CN104030379A (en) * | 2014-05-29 | 2014-09-10 | 国家海洋局天津海水淡化与综合利用研究所 | Evaporator for treating oily sewage |
| CN104310515A (en) * | 2014-10-16 | 2015-01-28 | 苏州欧拉工程技术有限公司 | Mechanical vapor recompression seawater desalination method |
| US9266037B2 (en) | 2009-09-21 | 2016-02-23 | Phoenix Water | Thermal distillation system and process |
| CN105664514A (en) * | 2016-04-06 | 2016-06-15 | 东营宝莫环境工程有限公司 | Horizontal mvc evaporator |
| 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 |
| CN106500406A (en) * | 2016-10-25 | 2017-03-15 | 中原工学院 | A kind of driving heat source sensible heat direct circulation utilizes type multistage evaporation enrichment facility |
| CN106629935A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Waste water processing method and device |
| CN106745429A (en) * | 2017-02-13 | 2017-05-31 | 国网辽宁省电力有限公司电力科学研究院 | A kind of mechanical vapor-compression sea water desalinating unit of utilization wind energy |
| CN106938178A (en) * | 2017-03-20 | 2017-07-11 | 国家海洋局天津海水淡化与综合利用研究所 | Multi-effect plate type film distilling seawater desalination system based on both vapor compression |
| EP3932509A1 (en) | 2020-06-30 | 2022-01-05 | Aquafair AB | Mechanical vapor recompression (mvr) liquid purification system |
| EP3938070A4 (en) * | 2019-03-14 | 2022-10-26 | Vivek Verma | Method, process and apparatus for the very low temperature evaporation system |
-
2003
- 2003-12-16 CN CNA2003101075577A patent/CN1546386A/en active Pending
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9266037B2 (en) | 2009-09-21 | 2016-02-23 | Phoenix Water | Thermal distillation system and process |
| CN101780988B (en) * | 2009-12-30 | 2013-01-16 | 中国第一重型机械股份公司 | Novel sea water desalinization evaporator |
| CN103011480A (en) * | 2012-10-17 | 2013-04-03 | 李毅 | Multi-effect wastewater desalination device |
| CN103908788B (en) * | 2012-12-31 | 2015-12-23 | 中国科学院理化技术研究所 | MVR heat pump evaporation system |
| CN103908788A (en) * | 2012-12-31 | 2014-07-09 | 中国科学院理化技术研究所 | MVR heat pump evaporation system |
| CN103073142A (en) * | 2013-01-11 | 2013-05-01 | 中国电子工程设计院 | Multiple-effect-group, low-temperature and multiple-effect distilled seawater desalination system |
| CN103265089A (en) * | 2013-05-07 | 2013-08-28 | 西安交通大学 | High temperature high efficiency multi-effect seawater distillation desalination apparatus and method |
| CN103265089B (en) * | 2013-05-07 | 2014-11-05 | 西安交通大学 | High temperature high efficiency multi-effect seawater distillation desalination apparatus and method |
| CN103908789A (en) * | 2014-04-02 | 2014-07-09 | 江苏科化节能环保设备有限公司 | MVR (mechanical vapor recompression) heat pump vaporization system for accelerating to start up by adopting energy accumulation water tank |
| CN104030379A (en) * | 2014-05-29 | 2014-09-10 | 国家海洋局天津海水淡化与综合利用研究所 | Evaporator for treating oily sewage |
| CN104030379B (en) * | 2014-05-29 | 2015-09-23 | 国家海洋局天津海水淡化与综合利用研究所 | A kind of vaporizer processing oily(waste)water |
| CN104310515B (en) * | 2014-10-16 | 2015-12-30 | 苏州欧拉工程技术有限公司 | Mechanical vapor recompression seawater desalination method |
| CN104310515A (en) * | 2014-10-16 | 2015-01-28 | 苏州欧拉工程技术有限公司 | Mechanical vapor recompression seawater desalination method |
| CN106629935B (en) * | 2015-11-02 | 2019-11-15 | 中国石油化工股份有限公司 | A kind of wastewater treatment method and device |
| CN106629935A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Waste water processing method and device |
| CN105664514A (en) * | 2016-04-06 | 2016-06-15 | 东营宝莫环境工程有限公司 | Horizontal mvc evaporator |
| 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 |
| CN106500406A (en) * | 2016-10-25 | 2017-03-15 | 中原工学院 | A kind of driving heat source sensible heat direct circulation utilizes type multistage evaporation enrichment facility |
| CN106500406B (en) * | 2016-10-25 | 2018-10-16 | 中原工学院 | A kind of driving heat source sensible heat direct circulation utilizes type multistage evaporation enrichment facility |
| CN106745429A (en) * | 2017-02-13 | 2017-05-31 | 国网辽宁省电力有限公司电力科学研究院 | A kind of mechanical vapor-compression sea water desalinating unit of utilization wind energy |
| CN106938178A (en) * | 2017-03-20 | 2017-07-11 | 国家海洋局天津海水淡化与综合利用研究所 | Multi-effect plate type film distilling seawater desalination system based on both vapor compression |
| EP3938070A4 (en) * | 2019-03-14 | 2022-10-26 | Vivek Verma | Method, process and apparatus for the very low temperature evaporation system |
| US12280321B2 (en) * | 2019-03-14 | 2025-04-22 | Vivek Verma | Method, process and apparatus for the very low temperature evaporation system |
| EP3932509A1 (en) | 2020-06-30 | 2022-01-05 | Aquafair AB | Mechanical vapor recompression (mvr) liquid purification system |
| WO2022002708A1 (en) | 2020-06-30 | 2022-01-06 | Aquafair Ab | Mechanical vapor recompression (mvr) liquid purification system |
| US12157071B2 (en) | 2020-06-30 | 2024-12-03 | Aquafair Ab | Mechanical vapor recompression (MVR) liquid purification system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1546386A (en) | Method and device for desalting sea water using mechanical compression distillation method | |
| CN1554589A (en) | High efficiency sea water desalination device and method by distillation | |
| CN102557168B (en) | Heat-pipe low-temperature multi-effect sea water desalinating system and process flow | |
| CN1184147C (en) | Water distillation system | |
| CN104829026B (en) | High salt high concentration cellulose ether sewage disposal system | |
| CN103265089B (en) | High temperature high efficiency multi-effect seawater distillation desalination apparatus and method | |
| CN102616973A (en) | Method and device for processing high-saline organic wastewater | |
| CN1218923C (en) | Method for producing acrylic acid | |
| CN1171799C (en) | Multi-effect distilling process and equipment for desalinating seawater | |
| CN102381734A (en) | Low-temperature multi-effect seawater distillation and desalination system and method for sweater desalination | |
| CN106938178A (en) | Multi-effect plate type film distilling seawater desalination system based on both vapor compression | |
| WO2022057052A1 (en) | Treatment system and treatment method for landfill leachate wastewater | |
| CN108147608A (en) | It is a kind of to utilize compressed air and the multiple-effect evaporation crystal system and method for heat pump treatment of Power brine waste | |
| CN102616972A (en) | Comprehensive recycling method and device for high-salt-content amino acid waste water | |
| US3856632A (en) | Method and apparatus for producing a distillate | |
| CN105540626A (en) | Alumina mother liquor MVR circulation evaporation device and process | |
| CN112978829A (en) | Low-temperature multi-effect distillation seawater desalination system and process method thereof | |
| CN110054342A (en) | A method of product salt is obtained to high organic wastewater processing with high salt | |
| CN114149129A (en) | Rotational flow flash evaporation method and device for zero discharge of desulfurization wastewater of coal-fired power plant | |
| CN101279780B (en) | Method for removing sugar of and purifying boiler water for sugar refinery | |
| US3499827A (en) | Distillation plant | |
| CN1161280C (en) | Method and apparatus for preparing fresh water from sea water | |
| CN1724395A (en) | Apparatus of combined solar energy heat pump for desaltination of sea water | |
| CN102309865B (en) | Refining system for circulating 1, 3-propanediol in continuous production of poly(trimethylene terephthalate) | |
| CN205974141U (en) | Desulphurization waste water treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |