CN107032429A - A kind of reverse osmosis thick water treatment system and handling process - Google Patents
A kind of reverse osmosis thick water treatment system and handling process Download PDFInfo
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- CN107032429A CN107032429A CN201710239052.8A CN201710239052A CN107032429A CN 107032429 A CN107032429 A CN 107032429A CN 201710239052 A CN201710239052 A CN 201710239052A CN 107032429 A CN107032429 A CN 107032429A
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- falling film
- heat transfer
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- separator
- steam
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000008569 process Effects 0.000 title claims abstract description 7
- 230000000694 effects Effects 0.000 claims abstract description 221
- 239000011552 falling film Substances 0.000 claims abstract description 197
- 238000012546 transfer Methods 0.000 claims abstract description 132
- 230000004087 circulation Effects 0.000 claims abstract description 105
- 239000013078 crystal Substances 0.000 claims abstract description 56
- 238000001704 evaporation Methods 0.000 claims abstract description 40
- 230000008020 evaporation Effects 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims description 110
- 239000012141 concentrate Substances 0.000 claims description 56
- 239000010408 film Substances 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 48
- 239000012153 distilled water Substances 0.000 claims description 46
- 239000012452 mother liquor Substances 0.000 claims description 31
- 238000000926 separation method Methods 0.000 claims description 30
- 238000004821 distillation Methods 0.000 claims description 21
- 239000002562 thickening agent Substances 0.000 claims description 19
- 241000521257 Hydrops Species 0.000 claims description 17
- 206010030113 Oedema Diseases 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 8
- 239000003595 mist Substances 0.000 claims description 8
- 238000010025 steaming Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000012808 vapor phase Substances 0.000 claims description 7
- 238000002425 crystallisation Methods 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- 230000001351 cycling effect Effects 0.000 claims description 6
- 239000012071 phase Substances 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000007701 flash-distillation Methods 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 238000002207 thermal evaporation Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000007726 management method Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 238000013022 venting Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000002351 wastewater Substances 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 9
- 238000005265 energy consumption Methods 0.000 description 6
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention belongs to technical field of waste water processing, specifically related to a kind of reverse osmosis thick water treatment system and handling process, head tank including passing sequentially through pipeline connection, preheating device, one effect evaporation element, two effect evaporation elements, forced circulation unit, crystalline element, centrifugal compressor, one effect evaporation element includes an effect Falling film heat transfer device, one effect falling film separator, two effect evaporation elements include two effect Falling film heat transfer devices, two effect falling film separators, forced circulation unit includes one section of forced circulation heat exchanger, two sections of forced circulation heat exchangers, forced circulation pump, falling film separator is imitated in crystal separator connection two, two effect Falling film heat transfer devices, two effect falling film separator connection second separators, second separator connects centrifugal compressor, centrifugal compressor is avoided to damage, increase the service life, reduce production cost, treatment effect has larger lifting.
Description
Technical field
The invention belongs to technical field of waste water processing, and in particular to a kind of reverse osmosis thick water treatment system and handling process.
Background technology
High salt that reverse osmosis water in industrial wastewater contains, organic matter, inorganic matter concentration it is high, COD contents are high, industrially
Typically handled using traditional falling liquid film+forced circulation, ideal treatment effect, but its high energy consumption, cause production cost
It is high.Also, in existing processing unit and handling process, the indirect steam produced in crystal separator is passed directly into compressor and entered
It is mingled with liquid and small part stoste in row compression, indirect steam, liquid can greatly compromise the service life of compressor, and
And part stoste is mixed into vapour system, causes the decline of concentrated water treatment effect and use causes vapour system to occur for a long time
Corrosion failure.
The content of the invention
The technical problems to be solved by the invention are that there is provided a kind of reverse osmosis thick water treatment system and place for drawbacks described above
Science and engineering skill, energy consumption is relatively low, it is to avoid centrifugal compressor is damaged, and is increased the service life, is reduced production cost, treatment effect has larger
Lifting.
The technical scheme that the present invention solves the use of its technical problem is as follows：
A kind of reverse osmosis thick water treatment system, including pass sequentially through the head tank, preheating device, an effect evaporation of pipeline connection
Unit, two effect evaporation elements, forced circulation unit, crystalline element, centrifugal compressor, an effect evaporation element include an effect falling liquid film and changed
Hot device, an effect falling film separator, two effect evaporation elements include two effect Falling film heat transfer devices, two effect falling film separators, forced circulation list
Member includes one section of forced circulation heat exchanger, two sections of forced circulation heat exchangers, forced circulation pumps, and crystalline element includes Crystallization Separation
Device, thickener, centrifuge, head tank connect preheating device by pipeline, and preheating device imitates Falling film heat transfer by pipeline connection one
Device lower tube box, an effect Falling film heat transfer device lower tube box is connected with an effect falling film separator, and an effect falling film separator lower end drops with an effect
The exterior line connection of film heat exchanger lower tube box, the lower tube box of an effect Falling film heat transfer device also connects with two effect Falling film heat transfer device lower tube box
Logical, an effect Falling film heat transfer device lower tube box imitates Falling film heat transfer device upper tube box by an effect falling liquid film circulating pump connection one,
Two effect Falling film heat transfer device lower tube box are connected with two effect falling film separators, and two effect falling liquid films steam separator bottom and two effects
The pipeline of Falling film heat transfer device lower tube box is connected, and two effect Falling film heat transfer device lower tube box are dropped by the effect of two effect falling liquid film circulating pump connection two
Film heat exchanger upper tube box, two effect Falling film heat transfer device lower tube box connect transfering material pump by pipeline, and transfering material pump is connected by pipeline and crystallized
Separator, crystal separator lower output side connects two sections of forced circulation heat exchanger upper ends, two sections of forced circulation heat exchanger lower ends
Forced circulation pump is connected, forced circulation pump connects one section of forced circulation heat exchanger bottom, and one section of forced circulation heat exchanger top connects
Connect crystal separator upper input, crystal separator bottom with input is not connected on thickener, thickener bottom output end
Centrifuge is connected, the liquid outlet connection mother liquor tank of centrifuge, mother liquor tank upper output terminal is connected with thickener upper input,
Centrifugal compressor is connected with external fresh steam, and the steam that Falling film heat transfer device is imitated in the outlet of centrifugal compressor by pipeline connection one enters
Mouthful, mother liquor tank steam inlet connects external fresh steam, and the steam (vapor) outlet of an effect Falling film heat transfer device connects one section of forced circulation heat exchange
Falling film heat transfer device is imitated in device, an effect falling film separator steam (vapor) outlet connection two, and one section of forced circulation heat exchanger, two sections of forced circulations are changed
The not condensing outlet preheating device of hot device, condensing output end is not provided with not condensing separator, crystal separator to preheating device
Falling film separator steam inlet is imitated in steam (vapor) outlet connection two, and two effect Falling film heat transfer devices, the steam (vapor) outlet of two effect falling film separators connect
The logical second separator set, second separator output end connection centrifugal compressor, the hydrops outlet of second separator passes through
Hydrops pipeline connection crystal separator distills water inlet, and hydrops pipeline is provided with liquid seal device.
The indirect steam discharged from crystal separator first introduces two effect falling film separators and is re-introduced into after gas liquid separating function
Second separator, using horizontal separator, its internal deflection plate used carries out gas liquid separating function to being passed through steam, it is ensured that most
The steam for being passed through centrifugal compressor afterwards is not mingled with moisture, it is to avoid centrifugal compressor is damaged, and extends the service life of centrifugal compressor,
The hydrops that second separator is isolated is not directly discharged into distillation water pot, is introduced into by pipeline in crystal separator, it is ensured that system
The water quality of distilled water, promotes the raising for the treatment of effect, and economic benefits and social benefits falling liquid film+forced circulation processing, evaporation imitates MVR drops using advanced two
Membrane process, then forced circulation is carried out, it is more energy efficient, treatment effect is greatly improved, production cost is reduced.
Further, described preheating device includes condensed water plate type heat exchanger, the not condensing plate-type heat-exchange set gradually
Raw material flows through condensed water plate type heat exchanger, not condensing plate type heat exchanger, steam successively in device, steam-plate type heat exchanger, head tank
Enter an effect Falling film heat transfer device after plate type heat exchanger, described not condensing separator is connected with not condensing plate type heat exchanger, do not coagulated
Vapour separator is provided with hydrops outlet, condensing is not exported, and condensed water plate type heat exchanger is provided with distilled water outlet, and one section of forced circulation is changed
Hot device, two sections of forced circulation heat exchangers, effect Falling film heat transfer device steam (vapor) outlets connect steam-plate type heat exchanger by pipeline.
Further, it is one section of forced circulation heat exchanger, two sections strong at described effect Falling film heat transfer device provided with distillation water pot
The distilled water outlet connection distillation water pot of circulation heat exchanger processed, distillation water pot connection preheating device, an effect Falling film heat transfer device, two effects
Compensator is provided with Falling film heat transfer device, Falling film heat transfer device, preheating device are imitated in compensator connection two, and compensator connects with distillation water pot
It is logical.
Condensed water plate type heat exchanger connects the pipeline between compensator, and condensed water plate type heat exchanger, compensator by pipeline
On be additionally provided with distilled water pump, not condensing plate type heat exchanger
Further, described mother liquor tank bottom delivery outlet is transported to mother liquor in tank at forced circulation pump by mother liquor pump,
And mother liquor pump bottom delivery outlet pipeline is provided with reserved opening.
Further, described second separator is horizontal baffle plate type separator, includes cylinder, the inner barrel of horizontal placement
Baffle plate, cylinder one end is that the import other end is outlet, and baffle plate is divided into several blast fences, two dividing plates, and two dividing plates are vertical
It is arranged in the middle part of inner barrel, two dividing plate bottoms are connected with cylinder inboard wall bottom, the inner barrel between two dividing plates is accommodating cavity, is entered
Corresponding inner barrel is disengagement chamber between a dividing plate mouthful adjacent thereto, is exported between a dividing plate adjacent thereto in corresponding cylinder
Portion is discharge chamber, blast fence interphase distribution in disengagement chamber, and is arranged in the shape of a spiral along airintake direction blast fence, spiral side
To consistent with airflow direction, and the corresponding blast fence bottom of cylinder body bottom is equipped with through hole, and corresponding dividing plate bottom is equally set
There is the blast pipe that helical form horizontal positioned is provided with through hole, discharge chamber, venting conduit inlet end is provided with mist eliminator, exhaust outlet end
It is connected with outlet, blast pipe its bottom is provided with corresponding cylinder at scupper, accommodating cavity and is provided with discharge outlet, sewage draining exit, draining
Corresponding inner barrel is provided with drainpipe at mouthful, and drainpipe is higher than sewage draining exit, and indirect steam is after import enters, first in separation
Intracavitary hits the liquid separation being mingled with after blast fence, helical arrangement, multiple impact in steam, and the liquid isolated is fallen simultaneously
Collected from through hole to accommodating cavity, pressure is big at air inlet, forces hydrops to collect to accommodating cavity, the steam after separation is through accommodating cavity to row
Air cavity flows, and is discharged through mist eliminator into blast pipe, and mist eliminator is removed liquid again, and spiral helicine blast pipe equally rises
Centrifugation is hit, scupper flows downward out the liquid isolated to collect, through multiple impact, the liquid in steam is separated
Go out, make the steam for transporting to centrifugal compressor without liquid, protect compressor.
Further, described liquid seal device is U-tube, and U-tube one end is connected with the lateral line of secondary compressor one, U-shaped
The pipe other end is connected with the management of crystal separator side, and the port being connected with the lateral line of crystal separator one be less than with it is secondary
The connectivity port of the lateral line of compressor one, liquid seal device can avoid the gaseous state in crystal separator from escaping.
A kind of reverse osmosis concentrated water treatment technology, comprises the following steps：
(1) feed：Reverse osmosis concentrated water is come out from original fluid container, and plate type heat exchanger is squeezed into by feed pump, in plate type heat exchanger
Feeding liquid carries out heat exchange with the steam condensate (SC) that system is produced, and is warming up to after evaporating temperature and enters falling film evaporator, is steamed
Hair concentration；
(2) an effect Falling film heat transfer device, two effect Falling film heat transfer device effects, in falling film evaporator tubulation, material are passed sequentially through
From top to down, by thermal evaporation, concentrate falls to lower tube box, passes sequentially through rear material and reaches higher concentration, defeated by transfering material pump
Deliver to and continue evaporating, concentrating and crystallizing in forced circulation steam；
Raw material after preheating enters an effect Falling film heat transfer device, material in the falling film evaporation tubulation of an effect Falling film heat transfer device from
Under above, by thermal evaporation, form concentrate and drop down onto an effect Falling film heat transfer device lower tube box, after vapor-liquid separation, steam and part are pressed from both sides
Steam with the concentrate spittle enters an effect falling film separator, and the lower tube box of a part of concentrate from an effect Falling film heat transfer device is exported
The upper tube box of an effect Falling film heat transfer device is pumped into through an effect falling liquid film circulating pump, is continued cycling through, another part concentrate passes through pressure differential
Into the lower tube box of two effect Falling film heat transfer devices, after the steam in an effect falling film separator is separated, concentrate divides from an effect falling liquid film
Converge from device lower end with an effect Falling film heat transfer device lower tube box exit concentrate, upper end conduct of the steam from an effect falling film separator
The steam for the vapor phase equilibrium mouthful discharge that thermal source enters on two effect Falling film heat transfer devices, an effect Falling film heat transfer device enters distillation water pot, steams
Because differential pressure action enters back into an effect Falling film heat transfer device after part distilled water flash distillation in distilled water tank, remaining distillation water pot enters
Compensator,
The concentrate of two effect Falling film heat transfer device lower tube box is pumped into two effect Falling film heat transfer devices by two effect falling liquid film circulations, and one
The steam that effect falling film separator comes out enters two effect Falling film heat transfer devices as thermal source, and after heat exchange, concentrate imitates falling liquid film two
Evaporation is produced in heat exchanger, the indirect steam of entrainment portions concentrate enters two effect falling film separators, part concentration after evaporation
Liquid is pumped into two effect Falling film heat transfer device upper ports from the lower tube box outlet of two effect Falling film heat transfer devices through two effect falling liquid film circulating pumps, continues to follow
Ring, another part concentrate is pumped into crystal separator gas phase portion by transfering material pump, and two sections are entered back into after being separated through flash concentration
After steam in forced circulation heat exchanger, two effect falling film separators is separated, concentrate imitates falling film separator lower ends and two from two
The partial concentration liquid of the lower tube box outlet of effect Falling film heat transfer device converges, and steam enters one section strong from the upper end of two effect falling film separators
Circulation heat exchanger processed enters compensator with the steam for providing the vapor phase equilibrium mouthful discharge on thermal source, two effect Falling film heat transfer devices, balances
Because differential pressure action enters two effect Falling film heat transfer devices after part distilled water flash distillation in tank, remaining distilled water passes through distilled water pump pump
Enter distilled water plate heat exchanger；
(3) material enters crystal separator, flash concentration is carried out in crystal separator, concentrate and indirect steam are in knot
Vapor-liquid separation is carried out in brilliant separator, the concentrate after gas-liquid separation enters strong after two sections of forced circulation heat exchanger increasing temperature and pressures
Circulating pump processed squeezes into one end forced circulation heat exchanger, and the indirect steam of crystal separator is drawn；
(4) concentrate after two sections of forced circulation heat exchanger increasing temperature and pressures is forced circulating pump and squeezes into one section of forced circulation
Heat exchanger, concentrate proceeds heating in one section of forced circulation heat exchanger, and crystal separator, gas-liquid separation, two are entered afterwards
Secondary steam is drawn, and concentrate enters back into two sections of forced circulation heat exchanger increasing temperature and pressures, so circulation, when concentrate is in Crystallization Separation
Reached in device and thickener is pumped to after discharge concentration；
(5) material in thickener enters centrifuge after stiff, the crystallizing and drying packing after centrifugation, is centrifuging
Desuperheated mother liquor enters mother liquor tank in journey, and mother liquor tank connects the fresh steam feed system of external boiler, is carried out using first steam
Heating, it is heated after reach evaporating temperature introduce crystal separator proceed be concentrated by evaporation；
Further, the indirect steam isolated in step (3), step (4) from crystal separator is introduced directly into two effects
Falling film separator, then exported by the upper end of two effect falling film separators to the second separator of horizontal baffle arrangement, through secondary separation
Device inputs centrifugal compressor after being mingled with liquid separation in indirect steam, and indirect steam is by after centrifugal compressed, and temperature is increased to finger
Constant temperature degree, during the steam after compression squeezes into system heated material, heated material again, this some vapor is condensed into distilled water
Distillation water pot, compensator are flow to, and plate type heat exchanger is pumped into by distilled water pump and is exchanged heat with material liquid, temperature is down to 35 DEG C or so rows
Go out system
The beneficial effects of the invention are as follows：Using such scheme, economic benefits and social benefits falling liquid film+forced circulation processing, using advanced two effects
MVR falling liquid film techniques, then forced circulation is carried out, it is more energy efficient, treatment effect is greatly improved, production cost is reduced, from crystallization
The indirect steam of separator discharge first introduces two effect falling film separators and second separator is re-introduced into after gas liquid separating function, uses
Horizontal separator, its internal deflection plate used carries out gas liquid separating function to being passed through steam, it is ensured that be finally passed through centrifugal compressed
The steam of machine is not mingled with moisture, it is to avoid centrifugal compressor is damaged, and extends the service life of centrifugal compressor, second separator separation
The hydrops gone out is not directly discharged into distillation water pot, is introduced into by pipeline in crystal separator, it is ensured that the water quality of system distilled water, promotees
Make the raising for the treatment of effect.
Brief description of the drawings
By detailed description below in conjunction with the accompanying drawings, the present invention is foregoing will to be become with other objects, features and advantages
Obviously.
Fig. 1 is structural representation of the invention.
Fig. 2 is the sectional view of second separator of the present invention.
Wherein：1 is original fluid container, and 1.1 be raw material pump, and 2 be centrifugal compressor, and 3 be an effect Falling film heat transfer device, 4 one effect falling liquid films
Separator, 5 be two effect Falling film heat transfer devices, and 6 be two effect falling film separators, and 7 be one section of forced circulation heat exchanger, and 8 be two sections of pressures
Circulation heat exchanger, 9 be forced circulation pump, and 10 be crystal separator, and 11 be thickener, and 12 be centrifuge, and 13 be that condensed water is board-like
Heat exchanger, 14 be distilled water plate type heat exchanger, and 15 be steam-plate type heat exchanger, and 16 be an effect falling liquid film circulating pump, and 17 be two effect drops
Film circulating pump, 18 be transfering material pump, and 19 be mother liquor tank, and 20 be second separator, and 20.1 be import, and 20.2 be outlet, and 20.3 be gas
Baffle plate is flowed, 20.4 be form, and 20.5 be dividing plate, and 20.6 be blast pipe, and 20.7 be through hole, and 20.8 be discharge outlet, and 20.9 be to catch mist
Device, 21 be fixed gas separator, and 22 be distillation water pot, and 23 be compensator, and 24 be distilled water pump.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
As shown in Figure 1-2, it is optimum embodiment of the present invention,
A kind of reverse osmosis thick water treatment system, including pass sequentially through the head tank 1, preheating device, an effect steaming of pipeline connection
Bill member, two effect evaporation elements, forced circulation unit, crystalline element, centrifugal compressor 2, an effect evaporation element include an effect drop
Film heat exchanger 3, one imitates falling film separator 4, and two effect evaporation elements include two effect Falling film heat transfer devices 5, two and imitate falling film separator 6, by force
Cycling element processed includes one section of forced circulation heat exchanger 7, two sections of forced circulation heat exchangers 8, forced circulation pumps 9, crystalline element bag
Include crystal separator 10, thickener 11, centrifuge 12, condensed water plate type heat exchanger 13 that preheating device includes being sequentially connected in series, no
Raw material is in the presence of the raw material pump 1.1 of frequency conversion in condensing plate type heat exchanger 14, steam-plate type heat exchanger 15, head tank 1, by original
Material is pumped into condensed water plate type heat exchanger 13 by pipeline, and variable frequency pump reduces power consumption, and it is board-like that reverse osmosis water flows through condensed water successively
Enter the lower tube box of an effect Falling film heat transfer device 3, one after heat exchanger 13, not condensing plate type heat exchanger 14, steam-plate type heat exchanger 15
The lower tube box and an effect falling film separator 4 for imitating Falling film heat transfer device 3 pass through pipeline connection, an effect lower end of falling film separator 4 and an effect
The exterior line connection of the lower tube box of Falling film heat transfer device 3, the lower tube box of an effect Falling film heat transfer device 3 is also imitated under Falling film heat transfer devices 5 with two
Bobbin carriage imitates the upper tube box of Falling film heat transfer device 3 by pipeline connection one by pipeline connection, the lower tube box of an effect Falling film heat transfer device 3,
And provided with an effect falling liquid film circulating pump 16 between this section of pipeline,
The lower tube box of two effect Falling film heat transfer device 5 is connected with two effect falling film separators 6 by pipeline, and two effect falling liquid films steam separator
6 bottoms are connected with the pipeline of the lower tube box of two effect Falling film heat transfer devices 5, and the lower tube box of two effect Falling film heat transfer devices 5 is connected by pipeline
The upper tube box of logical two effect Falling film heat transfers device 5, and change section pipeline provided with two effect falling liquid film circulating pumps 17, two imitate under Falling film heat transfer devices 5
Bobbin carriage connects transfering material pump 18 by pipeline, and transfering material pump 18 is connected the gas phase portion of crystal separator 10 by pipeline, will heated dense
The material concentrate of contracting introduces crystal separator 10, and when being so advantageous in that 18 termination of pumping of transfering material pump, material can be refunded, it is to avoid pipeline
In material the material in concentration is caused dilution influence, connect forced circulation pump 9, forced circulation pump 9 pass through pipeline connection one
The bottom of section forced circulation heat exchanger 7, one section of top of forced circulation heat exchanger 7 connects the top of crystal separator 10 by pipeline and inputted
End, the lower output side of crystal separator 10 passes through two sections of upper ends of forced circulation heat exchanger 8 of pipeline connection, two sections of forced circulation heat exchange
The lower end of device 8 passes through pipeline by pipeline connection forced circulation pump 9, bottom and the upper input of thickener 11 of crystal separator 10
Connection, the bottom output end of thickener 11 is by pipeline connection centrifuge 12, and the liquid outlet of centrifuge 12 is female by pipeline connection
Flow container 19, the upper output terminal of mother liquor tank 19 is connected with the upper input of thickener 11, and distilled water is provided with an effect Falling film heat transfer device 3
Water pot 22, distilled water are distilled in tank 22, one section of forced circulation heat exchanger 3, distilled water outlet connection of two sections of forced circulation heat exchangers 5
Tank 22 connects one and imitated provided with compensator 23 at Falling film heat transfer device 3, two effect Falling film heat transfer devices 5, and the effect falling liquid films of the connection of compensator 23 two are changed
Hot device 5, distilled water plate type heat exchanger 14, and compensator 23 connects with distillation water pot 22, compensator 23 and distilled water plate-type heat-exchange
The pipeline that device 14 is connected is provided with distilled water pump, and distilled water is pumped into distilled water plate type heat exchanger 14, it is preheated after material enter
Enter after evaporator, and elevated steam carries out heat exchange evaporation after compression, whole system reaches thermal balance.
Indirect steam is introduced directly into two effect falling film separators 6, two effect drops by the steam (vapor) outlet of crystal separator 10 by pipeline
The horizontal second separator 20 that the steam (vapor) outlet connection of the effect falling film separator 6 of film heat exchanger 5, two is set, second separator 20 is defeated
Go out end connection centrifugal compressor 2, the steaming that the hydrops outlet of second separator 20 passes through hydrops pipeline connection crystal separator 10
Distilled water entrance, hydrops pipeline is provided with liquid seal device, and indirect steam first is passed through into two effect falling film separators 6 again by the two of setting
Secondary separator 20, further carries out gas-liquid separation to indirect steam, eliminates the impurity being mingled with, make the steaming for leading to centrifugal compressor
Vapour is pure steam, it is ensured that the service life of compressor, and the hydrops of second separator 20 does not drain into distillation water pot, is changed to drain into crystallization
Separator 10, and set on drainage pipeline using fluid-tight, then ensure to have carried out the water quality of distilled water, centrifugal compressor 2 is connected with
Steam inlet, the steaming of mother liquor tank 19 of Falling film heat transfer device 3 are imitated by pipeline connection one in external steam, the outlet of centrifugal compressor 2
Vapor inlet, the steam (vapor) outlet of an effect Falling film heat transfer device 3 connects one section of forced circulation heat exchanger 7, and the effect steam of falling film separator 4 goes out
Falling film heat transfer devices 5 are imitated in mouth connection two, and one section of forced circulation heat exchanger 3, steam (vapor) outlet of two sections of forced circulation heat exchangers 8 are connected not
Condensing plate type heat exchanger 14, external steam is directly accessed steam-plate type heat exchanger 15, and the output end of condensing plate type heat exchanger 14 does not connect
Not condensing separator 21 is connected to, condensing separator 21 is not provided with the outlet of not condensing, hydrops outlet, and condensed water plate type heat exchanger 13 is set
There is distilled water outlet, one section of forced circulation heat exchanger 7, two sections of forced circulation heat exchangers 8, one imitate the not condensing of Falling film heat transfer device 3
Outlet connects steam-plate type heat exchanger 15 by pipeline, raw material is heated using indirect steam, condensed water plate type heat exchanger
Connected by pipeline and be additionally provided with distilled water pump, described mother on the pipeline between compensator, and condensed water plate type heat exchanger, compensator
Flow container bottom delivery outlet transports to mother liquor in tank by mother liquor pump the gas phase portion of crystal separator 10, is so advantageous in that and turns material
During 18 termination of pumping of pump, material can be smash and refund, it is to avoid the material in pipeline causes dilution to influence on the material in concentration, and under mother liquor pump
Portion's delivery outlet pipeline is provided with reserved opening.
Described second separator is horizontal baffle plate type separator, includes cylinder, the baffle plate of inner barrel, cylinder of horizontal placement
Body left end 20.1 is that import right-hand member is outlet 20.2, and baffle plate is divided into several blast fences 20.3, two dividing plates 20.5, two dividing plates
20.5 are vertically arranged in the middle part of inner barrel, and the bottom of two dividing plate 20.5 is connected with cylinder inboard wall bottom, the cylinder between two dividing plates 20.5
Internal portion is that corresponding inner barrel is disengagement chamber, outlet 20.2 between accommodating cavity, 20.1 adjacent thereto dividing plates 20.5 of import
Between a dividing plate 20.5 adjacent thereto corresponding inner barrel be discharge chamber, the interphase distribution in disengagement chamber of blast fence 20.3,
And arranged in the shape of a spiral along airintake direction blast fence, the hand of spiral is consistent with airflow direction, and the corresponding air-flow of cylinder body bottom
Baffle bottom is equipped with through hole 20.7, and the corresponding bottom of dividing plate 20.5 is again provided with through hole 20.7, and cylinder top is provided with form
20.4, the situation for checking gas-liquid separation, the interior blast pipe 20.6 for being provided with helical form horizontal positioned of discharge chamber, blast pipe
20.6 arrival ends are provided with mist eliminator 20.9, and the port of export of blast pipe 20.6 is connected with outlet 20.2, and its bottom of blast pipe 20.6 is set
There is at scupper, accommodating cavity corresponding cylinder be provided with corresponding inner barrel at discharge outlet 20.8, sewage draining exit, discharge outlet 20.8 to set
There is drainpipe, drainpipe is higher than sewage draining exit, and indirect steam is after import enters, first in disengagement chamber inner impact blast fence, spiral shell
The liquid separation being mingled with after shape arrangement, multiple impact in steam is revolved, the liquid isolated falls and collected from through hole to accommodating cavity,
Pressure is big at air inlet, forces hydrops to collect to accommodating cavity, the steam after separation flows through accommodating cavity to discharge chamber, enters through mist eliminator
Enter blast pipe discharge, mist eliminator is removed liquid again, and spiral helicine blast pipe equally plays shock centrifugation, scupper
Flow downward out the liquid isolated to collect, through multiple impact, the liquid in steam is isolated, makes to transport to centrifugal compressor
Steam protects compressor without liquid.
Described liquid seal device is U-tube, and U-tube one end is connected with the lateral line of secondary compressor one, the U-tube other end and
The management of crystal separator side is connected, and the port being connected with the lateral line of crystal separator one is less than and secondary compressor side
The connectivity port of pipeline, liquid seal device can avoid the gaseous state in crystal separator from escaping.
A kind of reverse osmosis concentrated water treatment technology, comprises the following steps：The evaporation capacity for controlling the system is 35000kg/h,
(1) feed：Reverse osmosis concentrated water is come out from original fluid container 1, and plate type heat exchanger is pumped into by feed pump 1.1, is sequentially passed through cold
After solidifying water plate formula heat exchanger 13, not condensing plate type heat exchanger 14, steam-plate type heat exchanger 15 are heated, evaporating temperature is warming up to laggard
Enter falling film evaporator, be evaporated concentration；
(2) reach that the material of evaporating temperature enters the lower tube box of an effect Falling film heat transfer device 3 after preheating, external steam is to an effect
Falling film heat transfer device 3 provides thermal source, after heat exchange, and material produces evaporation in an effect Falling film heat transfer device 3, and material imitates falling liquid film one
In the falling film evaporation tubulation of heat exchanger 3 from top to down, liquid distributor is installed in the upper tube box of an effect Falling film heat transfer device 3, can be by liquid
Body is evenly distributed on Falling film heat transfer inside pipe wall, and material flows downward from heat exchange inside pipe wall by gravity, forms uniform liquid
Film, liquid film evaporates under shell steam heat effect, and indirect steam in the same direction is used as motive force, raising to the shearing force of liquid film
Heat exchange efficiency, makes liquid also to produce larger evaporation capacity even if flowing time is very short in heat exchange inside pipe wall, material is condensed into
Together enter a lower tube box for imitating Falling film heat transfer device 3 after concentrate with steam, after vapor-liquid separation, steam and part entrainment concentration
The steam of the liquid spittle enters an effect falling film separator 4, and the lower tube box of a part of concentrate from an effect Falling film heat transfer device 3 is exported through one
Effect falling liquid film circulating pump 16 is pumped into the upper tube box of an effect Falling film heat transfer device 3, continues cycling through, another part concentrate is entered by pressure differential
Enter the lower tube box of two effect Falling film heat transfer devices 5, after the steam imitated in falling film separator 4 is separated, concentrate divides from an effect falling liquid film
Converge from the lower end of device 4 with the lower tube box exit concentrate of an effect Falling film heat transfer device 3, steam is from the upper end of an effect falling film separator 4
The steam of the vapor phase equilibrium mouthful discharge entered as thermal source on two effect Falling film heat transfer devices 5, an effect Falling film heat transfer device 3 enters distilled water
It is remaining to steam because differential pressure action enters back into an effect Falling film heat transfer device 3 after part distilled water flash distillation in tank 22, distillation water pot 22
The concentrate that distilled water enters on compensator 23, the pipeline of the lower tube box of two effect Falling film heat transfer device 5 is sent by two effect falling liquid film circulating pumps 17
Enter the upper tube box of two effect Falling film heat transfer device 5, the steam that an effect falling film separator 4 comes out enters two effect Falling film heat transfer devices 5 as thermal source,
After heat exchange, concentrate produces evaporation in two effect Falling film heat transfer devices 5, and concentrate is condensed into after concentrate and steam one again
With two lower tube box for imitating Falling film heat transfer device 5 are entered, a part of concentrate is from the lower tube box outlet of two effect Falling film heat transfer devices 5 through two effects
Falling liquid film circulating pump 17 is pumped into the upper port of two effect Falling film heat transfer device 5, continues cycling through, another part concentrate is pumped into by transfering material pump 18
The gas phase portion of crystal separator 10, enters back into two sections of forced circulation heat exchangers 8, two effect falling film separators after being separated through flash concentration
After steam in 5 is separated, concentrate is exported from the lower tube box of the two effect lower ends of falling film separator 6 and two effect Falling film heat transfer devices 5
Partial concentration liquid converges, and steam enters one section of forced circulation heat exchanger 7 to provide thermal source from the upper end of two effect falling film separators 6,
The part distilled water that the steam of vapor phase equilibrium mouthful discharge on two effect Falling film heat transfer devices 5 enters in compensator 23, compensator 23 dodges
Because differential pressure action enters two effect Falling film heat transfer devices 5 after steaming, remaining distilled water is pumped into the board-like friendship of distilled water by distilled water pump 24
Parallel operation 13；
(3) material enters crystal separator 10, and flash concentration, concentrate and indirect steam are carried out in crystal separator 10
Vapor-liquid separation is carried out in crystal separator 10, the concentrate after gas-liquid separation enters two sections of heatings of forced circulation heat exchanger 8 and risen
It is forced the indirect steam that circulating pump 9 squeezed into one end forced circulation heat exchanger 7, crystal separator 10 after pressure by steam (vapor) outlet to be led to
Piping introduces two and imitates Falling film heat transfer device 6, and indirect steam is utilized, while gas-liquid separation processing is carried out to indirect steam,
By be mingled with indirect steam be mingled with liquid remove and the small part raw material being wherein mingled with is separated, raising raw material place
Effect and efficiency are managed, the indirect steam for removing liquid impurity is expelled to secondary point by the steam (vapor) outlet of two effect falling film separators 6
From device 20, the second separator 20 of baffle-type carries out gas-liquid separation processing to indirect steam again, separates the liquid being wherein mingled with,
Output is improved to the quality of the indirect steam of centrifugal compressor 2, it is to avoid liquid is inputted, extends the service life of centrifugal compressor 2,
Indirect steam is discharged in one section of forced circulation heat exchanger 7, not condensing outlet of two sections of forced circulation heat exchangers 8, and indirect steam passes through
Pipeline introduces not condensing plate type heat exchanger 14, and material is heated using indirect steam, the not condensing of heat exchange action formation
Not condensing separator 21 is introduced, separating treatment is carried out, the not condensing that the temperature isolated is down into 35 DEG C is discharged, the liquid isolated
Body, which is collected, to be used, and improves the exhaust of system, reduces pollution, while being handled exhaust, makes full use of money
Source, improves the utilization rate of the resources of production, one section of forced circulation heat exchanger 7, two sections of vapor phase equilibrium mouthful outflows of forced circulation heat exchanger 8
Condensed water enter lead to distillation water pot 22, applied.
(4) concentrate after two sections of increasing temperature and pressures of forced circulation heat exchanger 8 is forced circulating pump 9 and squeezes into one section of pressure to follow
Ring heat exchanger 7, concentrate proceeds heating in one section of forced circulation heat exchanger 7, rear to enter crystal separator 10, gas-liquid point
From indirect steam is drawn, and concentrate enters back into two sections of increasing temperature and pressures of forced circulation heat exchanger 8, do not stop circulating-heating, be not also parked
New concentrate is forced circulating pump 9 and squeezed into an effect Falling film heat transfer device 7 is pumped into, so circulation, higher dense of concentration in circulation
Contracting liquid sinks to the bottom close to separator, and thickener is pumped to after concentrate reaches discharge concentration in crystal separator 10
11；
(5) enter centrifuge 12 after being acted on into the material in thickener 11 through stiff and carry out separation of solid and liquid, isolate
Solid carries out crystallizing and drying packing, and the mother liquor isolated enters mother liquor tank 19, and the connection steam of mother liquor tank 19 is heated, through steam
Discharged after heating by mother liquor tank 19, then the gas phase portion of crystal separator 10 is squeezed into by mother liquor pump, proceed circulating and evaporating dense
Contracting, it is preheated after material enter after evaporator, and elevated steam carries out heat exchange evaporation after compression, and whole system reaches that heat is flat
Weighing apparatus, a whole set of vapo(u)rization system is controlled by PLC softwares, all output and input signal, and the operation of system all can be by supporting
Computer is completed.
The energy consumption of the distilled water per ton of the economic benefits and social benefits falling liquid film+forced circulation of the system is 26.2 degree, with traditional falling liquid film+pressure
Recycle ratio is compared with the energy consumption of the distilled water per ton of traditional falling liquid film+forced circulation is 39 degree, reduction energy consumption about 32.8%, this economic benefits and social benefits
The energy consumption of falling liquid film+forced circulation is much lower.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to
According to any simple modification, equivalent variations made in technical spirit of the invention to above example, the guarantor of the present invention is each fallen within
Within the scope of shield.
Claims (7)
1. a kind of reverse osmosis thick water treatment system, it is characterised in that：Including the head tank for passing sequentially through pipeline connection, pre- hot charging
Put, one imitates evaporation element, two effect evaporation elements, forced circulation unit, crystalline element, centrifugal compressor, an effect evaporation element bag
An effect Falling film heat transfer device, an effect falling film separator are included, two effect evaporation elements include two effect Falling film heat transfer devices, two effect falling liquid film separation
Device, forced circulation unit includes one section of forced circulation heat exchanger, two sections of forced circulation heat exchangers, forced circulation pumps, crystalline element
Including crystal separator, thickener, centrifuge,
Head tank connects preheating device by pipeline, and preheating device imitates Falling film heat transfer device lower tube box, an effect by pipeline connection one
Falling film heat transfer device lower tube box is connected with an effect falling film separator, an effect falling film separator lower end and an effect Falling film heat transfer device lower tube box
Exterior line connection, one effect Falling film heat transfer device lower tube box also with two effect Falling film heat transfer device lower tube box connect, one imitate falling liquid film changes
Hot device lower tube box imitates Falling film heat transfer device upper tube box by an effect falling liquid film circulating pump connection one,
Two effect Falling film heat transfer device lower tube box are connected with two effect falling film separators, and two effect falling liquid films steam separator bottom and two effect falling liquid films
The pipeline of heat exchanger lower tube box is connected, and two effect Falling film heat transfer device lower tube box are imitated falling liquid film by two effect falling liquid film circulating pump connections two and changed
Hot device upper tube box, two effect Falling film heat transfer device lower tube box connect transfering material pump by pipeline, and transfering material pump connects Crystallization Separation by pipeline
Device, crystal separator lower output side connects two sections of forced circulation heat exchanger upper ends, two sections of forced circulation heat exchanger lower end connections
Forced circulation pump, forced circulation pump connects one section of forced circulation heat exchanger bottom, one section of forced circulation heat exchanger top connection knot
Brilliant separator upper input, crystal separator bottom with input is not connected on thickener, thickener bottom output end connection
Centrifuge, the liquid outlet connection mother liquor tank of centrifuge, mother liquor tank upper output terminal is connected with thickener upper input,
Centrifugal compressor is connected with external fresh steam, and the steaming of Falling film heat transfer device is imitated in the outlet of centrifugal compressor by pipeline connection one
Vapor inlet, mother liquor tank steam inlet connects external fresh steam, and the steam (vapor) outlet of an effect Falling film heat transfer device connects one section of forced circulation
Falling film heat transfer device is imitated in heat exchanger, an effect falling film separator steam (vapor) outlet connection two, and one section of forced circulation heat exchanger, two sections of pressures are followed
The not condensing outlet preheating device of ring heat exchanger, condensing output end is not provided with not condensing separator to preheating device,
Falling film separator steam inlet, two effect Falling film heat transfer devices, two effect falling liquid film separation are imitated in crystal separator steam (vapor) outlet connection two
The second separator that the steam (vapor) outlet connection of device is set, second separator output end connection centrifugal compressor, second separator
Hydrops outlet distills water inlet by hydrops pipeline connection crystal separator, and hydrops pipeline is provided with liquid seal device.
2. a kind of reverse osmosis thick water treatment system according to claim 1, it is characterised in that：Described preheating device includes
Raw material flows successively in the condensed water plate type heat exchanger that sets gradually, not condensing plate type heat exchanger, steam-plate type heat exchanger, head tank
Enter an effect Falling film heat transfer device after condensed water plate type heat exchanger, not condensing plate type heat exchanger, steam-plate type heat exchanger, it is described
Condensing separator is not connected with not condensing plate type heat exchanger, and condensing separator is not provided with hydrops outlet, not condensing outlet, condensed water
Plate type heat exchanger is provided with distilled water outlet, one section of forced circulation heat exchanger, two sections of forced circulation heat exchangers, effect Falling film heat transfer devices
Steam (vapor) outlet connects steam-plate type heat exchanger by pipeline.
3. a kind of reverse osmosis thick water treatment system according to claim 1, it is characterised in that：A described effect Falling film heat transfer
Provided with distillation water pot at device, one section of forced circulation heat exchanger, distilled water outlet of two sections of forced circulation heat exchangers connect distilled water
Compensator, compensator connection are provided with tank, distillation water pot connection preheating device, an effect Falling film heat transfer device, two effect Falling film heat transfer devices
Two imitate Falling film heat transfer devices, preheating device, and compensator is connected with distillation water pot.
4. a kind of reverse osmosis thick water treatment system according to claim 1, it is characterised in that：Described mother liquor tank bottom is defeated
Outlet is transported to mother liquor in tank at forced circulation pump by mother liquor pump, and mother liquor pump bottom delivery outlet pipeline is provided with reserved opening.
5. a kind of reverse osmosis thick water treatment system according to claim 1, it is characterised in that：Described second separator is
Horizontal baffle plate type separator, includes cylinder, the baffle plate of inner barrel of horizontal placement, and cylinder one end is that the import other end is outlet,
Baffle plate is divided into several blast fences, two dividing plates, and two dividing plates are vertically arranged in the middle part of inner barrel, two dividing plate bottoms and cylinder
Inwall bottom is connected, and the inner barrel between two dividing plates is corresponding inner barrel between accommodating cavity, an import dividing plate adjacent thereto
For disengagement chamber, corresponding inner barrel is discharge chamber between exporting a dividing plate adjacent thereto, and blast fence is alternate in disengagement chamber
Arrangement, and arranged in the shape of a spiral along airintake direction blast fence, the hand of spiral is consistent with airflow direction, and cylinder body bottom is corresponding
Blast fence bottom is equipped with through hole, and corresponding dividing plate bottom is again provided with through hole, discharge chamber being provided with helical form horizontal positioned
Blast pipe, venting conduit inlet end is provided with mist eliminator, and exhaust outlet end is connected with outlet, and blast pipe its bottom is provided with leak
Mouthful, corresponding cylinder is provided with corresponding inner barrel at discharge outlet, sewage draining exit, discharge outlet and is provided with drainpipe, draining at accommodating cavity
Pipe is higher than sewage draining exit.
6. a kind of reverse osmosis thick water treatment system according to claim 1, it is characterised in that：Described liquid seal device is U
Type pipe, U-tube one end is connected with the lateral line of secondary compressor one, and the U-tube other end is connected with the management of crystal separator side,
And the port being connected with the lateral line of crystal separator one is less than the connectivity port with the lateral line of secondary compressor one, liquid seal device energy
The gaseous state in crystal separator is enough avoided to escape.
7. a kind of reverse osmosis concentrated water treatment technology, comprises the following steps：
(1) feed：Reverse osmosis concentrated water is come out from original fluid container, and plate type heat exchanger is squeezed into by feed pump, is fed in plate type heat exchanger
Liquid carries out heat exchange with the steam condensate (SC) that system is produced, and is warming up to after evaporating temperature and enters falling film evaporator, is evaporated dense
Contracting；
(2) an effect Falling film heat transfer device, two effect Falling film heat transfer devices effects are passed sequentially through, in falling film evaporator tubulation, material is from upper
And under, by thermal evaporation, concentrate falls to lower tube box, passes sequentially through rear material and reaches higher concentration, is delivered to by transfering material pump
Continue evaporating, concentrating and crystallizing in forced circulation steam；
Raw material after preheating enters an effect Falling film heat transfer device, and material is in the falling film evaporation tubulation of an effect Falling film heat transfer device from upper
Under, by thermal evaporation, form concentrate and drop down onto an effect Falling film heat transfer device lower tube box, after vapor-liquid separation, steam and part carry dense secretly
The steam of the contracting liquid spittle enters an effect falling film separator, and the lower tube box of a part of concentrate from an effect Falling film heat transfer device is exported through one
Effect falling liquid film circulating pump is pumped into the upper tube box of an effect Falling film heat transfer device, continues cycling through, another part concentrate is entered by pressure differential
After steam in the lower tube box of two effect Falling film heat transfer devices, an effect falling film separator is separated, concentrate imitates falling film separator from one
Lower end is converged with an effect Falling film heat transfer device lower tube box exit concentrate, and steam is used as thermal source from the upper end of an effect falling film separator
Into two effect Falling film heat transfer devices, the steam of the vapor phase equilibrium mouthful discharge on an effect Falling film heat transfer device enters distillation water pot, distilled water
Because differential pressure action enters back into an effect Falling film heat transfer device after part distilled water flash distillation in tank, remaining distillation water pot enters balance
Tank,
The concentrate of two effect Falling film heat transfer device lower tube box is pumped into two effect Falling film heat transfer devices by two effect falling liquid film circulations, an effect drop
The steam that membrane separator comes out enters two effect Falling film heat transfer devices as thermal source, and after heat exchange, concentrate imitates Falling film heat transfer two
Evaporation is produced in device, the indirect steam of entrainment portions concentrate enters two effect falling film separators after evaporation, a part of concentrate from
The lower tube box outlet of two effect Falling film heat transfer devices is pumped into two effect Falling film heat transfer device upper ports through two effect falling liquid film circulating pumps, continues cycling through,
Another part concentrate is pumped into crystal separator gas phase portion by transfering material pump, and two sections of pressures are entered back into after being separated through flash concentration
After steam in circulation heat exchanger, two effect falling film separators is separated, concentrate drops from two effect falling film separator lower ends with two effects
The partial concentration liquid of the lower tube box outlet of film heat exchanger converges, and steam is followed from the upper end of two effect falling film separators into one section of pressure
Ring heat exchanger is entered in compensator, compensator with the steam for providing the vapor phase equilibrium mouthful discharge on thermal source, two effect Falling film heat transfer devices
The flash distillation of part distilled water after two effect Falling film heat transfer devices are entered due to differential pressure action, remaining distilled water is pumped into steaming by distilled water pump
Distilled water plate heat exchanger；
(3) material enters crystal separator, flash concentration is carried out in crystal separator, concentrate and indirect steam are in crystallization point
From vapor-liquid separation is carried out in device, the concentrate after gas-liquid separation is forced to follow after entering two sections of forced circulation heat exchanger increasing temperature and pressures
Ring pump squeezes into one end forced circulation heat exchanger, and the indirect steam of crystal separator is drawn；
(4) concentrate after two sections of forced circulation heat exchanger increasing temperature and pressures is forced circulating pump and squeezes into the heat exchange of one section of forced circulation
Device, concentrate proceeds heating in one section of forced circulation heat exchanger, and crystal separator, gas-liquid separation, secondary steaming are entered afterwards
Vapour is drawn, and concentrate enters back into two sections of forced circulation heat exchanger increasing temperature and pressures, so circulation, when concentrate is in crystal separator
Reach and thickener is pumped to after discharge concentration；
(5) material in thickener enters centrifuge after stiff, the crystallizing and drying packing after centrifugation, in centrifugal process
Desuperheated mother liquor enters mother liquor tank, and mother liquor tank connects fresh steam and heated, it is heated after reach that evaporating temperature is introduced and crystallize
Separator proceeds to be concentrated by evaporation；
Characterized in that, the indirect steam isolated in step (3), step (4) from crystal separator is introduced directly into two effects drop
Membrane separator, then exported by the upper end of two effect falling film separators to the second separator of horizontal baffle arrangement, through second separator
Centrifugal compressor is inputted after liquid separation will be mingled with indirect steam, indirect steam is by after centrifugal compressed, and temperature is increased to specified
Temperature, during the steam after compression squeezes into system heated material, heated material again, this some vapor is condensed into distillation current
Plate type heat exchanger and material liquid heat exchange are pumped into distillation water pot, compensator, and by distilled water pump, temperature is down to 35 DEG C or so discharges
System.
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Application publication date: 20170811 |