CN109437238A - A kind of ammonium chloride solution processing system and ammonium chloride solution processing method - Google Patents
A kind of ammonium chloride solution processing system and ammonium chloride solution processing method Download PDFInfo
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- CN109437238A CN109437238A CN201811640330.1A CN201811640330A CN109437238A CN 109437238 A CN109437238 A CN 109437238A CN 201811640330 A CN201811640330 A CN 201811640330A CN 109437238 A CN109437238 A CN 109437238A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/16—Halides of ammonium
- C01C1/164—Ammonium chloride
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The present invention relates to a kind of ammonium chloride solution processing system and ammonium chloride solution processing methods, the ammonium chloride solution processing system includes preheater, falling film evaporator, first separator, forced-circulation evaporator, second separator, cooler crystallizer, centrifuge and vapour compression machine, it is evaporated by using falling liquid film and forced circulation MVR, material is introduced into falling film evaporator and is concentrated into the primary decrement of saturation, enter back into forced-circulation evaporation condensing crystallizing, so that the inventory into forced-circulation evaporator is reduced, reduce the internal circulating load of material in a device, to reduce energy consumption, it can achieve the purpose that evaporating, concentrating and crystallizing, energy-efficient effect can be reached again.
Description
Technical field
The present invention relates to technical field of sewage, molten more particularly to a kind of ammonium chloride solution processing system and ammonium chloride
Liquid processing method.
Background technique
Ammonium chloride, abbreviation oronain.Refer to the ammonium salt of hydrochloric acid, the mostly byproduct of basic industry.Nitrogenous 24%~26%, be in
The rectangular or octahedra little crystallization of white or yellowish, has powdery and granular two kinds of dosage forms, granular ammonium chloride is not easy to moisture absorption, easily
Storage, and the more base fertilizer for being used as production compound fertilizer of powdery ammonium chloride.Belong to physiological acidic fertilizer, because containing chlorine it is more due to should not be
It is applied on acid soil and saline-alkali soil, seed manure, rice seedling bed fertilizer or foliar fertilizer should not be used as, it also should not be in fear-chlorion crop (such as tobacco, Ma Ling
Potato, citrus, tea tree etc.) on apply.Ammonium chloride is higher for rice field fertilizer efficiency and stablizes, because C1 both can inhibit rice field, nitrification was made
With, and be conducive to Culm of Rice fiber and formed, increase toughness, reduces rice lodging and disease pest invasion.
Existing dense ammonium chloride condensing crystallizing equipment crystallization time is long, and heat transfer is slow, usually due to material in crystallization process
Cooling efficiency is low and non-uniform temperature, causes crystalline quality poor, energy consumption is also big.
Summary of the invention
Based on this, the object of the present invention is to provide a kind of ammonium chloride solution processing systems, solve chlorine in the prior art
Change that ammonium salt solution processing crystallization time is long, and heat transfer is slow, causes crystalline quality poor, energy consumption also big technical problem, by using drop
Film and forced circulation MVR evaporation, material are introduced into falling film evaporator and are concentrated into the primary decrement of saturation, enter back into forced-circulation evaporation
Condensing crystallizing reduces the internal circulating load of material in a device, to drop so that the inventory into forced-circulation evaporator is reduced
Low energy consumption.
A kind of ammonium chloride solution processing system, comprising:
Preheater, the preheater include preheating entrance, preheating outlet, distillation water inlet and third distilled water outlet；
Falling film evaporator, the falling film evaporator include falling film evaporation entrance, falling film evaporation outlet, the first steam inlet and
First distilled water outlet, the preheating outlet are connected to the falling film evaporation entrance；
First separator, first separator includes the first separate inlet opening, the first separation exports and the first steam (vapor) outlet,
The falling film evaporation outlet is connected to first separate inlet opening；
Forced-circulation evaporator, the forced-circulation evaporator include that forced-circulation evaporation entrance, forced-circulation evaporation go out
Mouth, the second steam inlet and after-fractionating water out；First separation outlet is connected to the forced-circulation evaporation entrance；
Second separator, second separator includes the second separate inlet opening, the second separation exports and the first steam (vapor) outlet,
The forced-circulation evaporation outlet is connected to second separate inlet opening；
Cooler crystallizer, the cooler crystallizer include that crystallization entrance and crystallization export, second separation outlet and institute
State crystallization entrance connection；
Centrifuge, the centrifuge include centrifugation entrance and centrifugation outlet, and the crystallization outlet connects with the centrifugation entrance
It is logical；
Vapour compression machine, the vapour compression machine include compression entrance and compression outlet, first steam (vapor) outlet and the
Two steam (vapor) outlets are connected to the compression entrance respectively, the compression outlet respectively with first steam inlet and the second steam
Entrance connection, first distilled water outlet and after-fractionating water out are connected to the distillation water inlet respectively.
It further include mother liquor tank as the further improvement of above-mentioned ammonium chloride solution processing system, the mother liquor tank includes mother
Liquid entrance and mother liquor outlet, the centrifuge further include centrifugation liquid outlet, and the centrifugation liquid outlet is connected to the mother liquor entrance,
Second separator further includes refluxing opening, and the mother liquor outlet is connected to the refluxing opening.
It further include fore filter as the further improvement of above-mentioned ammonium chloride solution processing system, the prefilter
Device includes that filtering entrance and filtering outlet, the filtering outlet are connected to the preheating entrance.
As the further improvement of above-mentioned ammonium chloride solution processing system, it is all provided in first separator and the second separation
It is equipped with demister.
As the further improvement of above-mentioned ammonium chloride solution processing system, the forced-circulation evaporator is that board-like pressure follows
Ring evaporator.
As the further improvement of above-mentioned ammonium chloride solution processing system, be provided on the cooler crystallizer liquidometer,
Liquid phase gas phase temperature sensor and pressure sensor.
As the further improvement of above-mentioned ammonium chloride solution processing system, the cooler crystallizer bottom is arc surface.
The present invention also provides a kind of ammonium chloride solution processing methods, comprising the following steps:
Ammonium chloride solution enters the preheater and is preheated；
Ammonium chloride solution by preheating enters the falling film evaporator and is evaporated；
Enter in first separator by the ammonium chloride solution of falling film evaporator and is separated, isolated secondary steaming
Vapour and ammonium chloride concentrate；
Enter the forced-circulation evaporator by the ammonium chloride concentrate of first separator to be evaporated；
Enter in second separator by the ammonium chloride concentrate of the forced-circulation evaporator and separated, again
Obtain secondary steam and ammonium chloride concentrate；
Ammonium chloride concentrate by secondary separation enters the cooler crystallizer and carries out crystallisation by cooling；
Ammonium chloride concentrate after crystallisation by cooling enters the centrifuge and is separated by solid-liquid separation, and obtains chloride solid object
Material；
The secondary steam that first separator and the second separator generate enters the vapour compression machine and is compressed, so
It is condensed into distilled water into the falling film evaporator afterwards, the distilled water is discharged by the preheater.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1, ammonium chloride solution processing system of the present invention includes preheater, falling film evaporator, the first separator, forces
Circulating evaporator, the second separator, cooler crystallizer, centrifuge and vapour compression machine, by using falling liquid film and forced circulation
MVR evaporation, material are introduced into falling film evaporator and are concentrated into the primary decrement of saturation, enter back into forced-circulation evaporation condensing crystallizing, make
The inventory obtained into forced-circulation evaporator is reduced, and reduces the internal circulating load of material in a device, to reduce energy consumption, both
It can achieve the purpose that evaporating, concentrating and crystallizing, and energy-efficient effect can be reached.
2, the fore filter can go out the solid suspension of material.
3, board-like forced-circulation evaporator has the advantages that heat transfer efficiency compared with high, heat loss is small, ant-scaling resistance to salting-out.
4, liquidometer, liquid phase gas phase temperature sensor and the pressure sensor being arranged on the cooler crystallizer can be at any time
Keep the working condition of the cooler crystallizer under the standard of design.
5, the bottom of the crystallizer is arc surface, improves flow regime of the feed liquid inside crystallizer.
6, using ammonium chloride solution processing method of the present invention, it is highly suitable for that treating capacity is big, complicated component, concentration
Materials not high and containing soluble solids.It is evaporated using falling liquid film and board-like forced circulation MVR, evaporation and concentration knot can be reached
Brilliant purpose, and energy-efficient effect can be reached.
In order to better understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of ammonium chloride solution processing system of the present invention；
Fig. 2 is the flow chart of ammonium chloride solution processing method of the present invention.
Specific embodiment
Referring now to attached drawing hereinafter, the present invention is described in more detail below, shows the embodiment of the present invention in the figure.
However, the present invention can be presented as many different forms, and it should not be construed as being limited to specific embodiment presented herein.
Exactly, these embodiments are for conveying the scope of the invention to those skilled in the art.
Unless otherwise defined, otherwise, term (including technical and scientific terms) used herein is interpreted as
With the identical meaning of the meaning that is generally understood with the technical staff in field belonging to the present invention.Also, it is to be understood that
Term used herein be interpreted as having with the consistent meaning of meaning in this specification and related fields, and do not answer
It is explained by ideal or excessively formal meaning, unless being clearly specified that herein.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.
As shown in FIG. 1, FIG. 1 is the structural schematic diagrams of ammonium chloride solution processing system of the present invention.
A kind of ammonium chloride solution processing system, including fore filter 1, preheater 2, falling film evaporator 3, the first separator
4, forced-circulation evaporator 5, the second separator 6, cooler crystallizer 7, centrifuge 8 and vapour compression machine 9.Ammonium chloride solution exists
Circulation in the system relies primarily on circulating pump and generates forced flow, and ammonium chloride solution goes to clean by the fore filter 1
Matter is exchanging heat with distilled water by the preheater 2, is entering back into falling film evaporator 3, enter described first after reaching evaporating temperature
It is separated in separator 4, generates secondary steam and concentrate, the concentrate that the first separator 4 generates subsequently enters described strong
Circulating evaporator 5 processed carries out double evaporation-cooling, carries out secondary separation subsequently into second separator 6 and obtains secondary steam again
And further concentrate, concentrate reach aimed concn heel row to the cooler crystallizer 7, concentrate after crystallisation by cooling again
It is separated by solid-liquid separation into the centrifuge 8, finally obtains solid material.What first separator and the second separator generated
After secondary steam fully enters the pressurization of vapour compression machine 9 heating, it is being divided into two strands after heating, is respectively enteing drop as heat source
The shell side of film evaporator 3 and board-like forced-circulation evaporator 5, is then condensed into distilled water, and preheated device 2 is discharged.
Each component part of the present embodiment recyclable device is described in detail individually below.
The fore filter 1 includes filtering entrance and filtering outlet, since material may contain a small amount of solid suspension,
Therefore, it is necessary to the fore filters 1 to be filtered.Specifically, the fore filter is bag filter, preferably for convenience
The fast-open type bag filter of disassembly, filtering progress can be adjusted according to filter bag, and maximum filtering progress is 1 μm.This kind of filter
It is easy to maintain with easy cleaning, the advantages that filtering accuracy is adjustable.
The preheater 2 includes preheating entrance, preheating outlet, distillation water inlet and after-fractionating water out；The filtering
Outlet is connected to the preheating entrance.Specifically, the feed rate of the preheater 2 is 12.7t/h, and concentration 5%, temperature is
25℃。
The falling film evaporator 3 includes falling film evaporation entrance, falling film evaporation outlet, the first steam inlet and the first distilled water
Outlet, the preheating outlet are connected to the falling film evaporation entrance.Falling film evaporation is to heat feed liquid on room from falling film evaporator
Bobbin carriage is added, and through liquid distribution and film formation device, is evenly distributed in each heat exchanger tube, in gravity and vacuum induced and airflow function
Under, it is flowed from above to below at uniformly membranaceous.In flow process, is heated and vaporize by shell side heat medium, the steam and liquid phase of generation
The common separation chamber for entering evaporator, for vapour-liquid through being sufficiently separated, steam enters suction port of compressor, and liquid phase is then discharged by separation chamber.
First separator 4 includes that the first separate inlet opening, the first separation outlet and the first steam (vapor) outlet, the falling liquid film steam
Mouth is issued to be connected to first separate inlet opening.Specifically, first separator 4 is equipped with demister, described first
In separator 4 and steam (vapor) outlet is provided with two-stage demister.The setting of demister effectively prevents drop entrainment feed liquid
The phenomenon that, the mist in gas is separated, operating condition is improved, optimizes technic index, improves the quality of secondary steam, reduction is set
Standby corrosion phenomenon, extends the service life of equipment, it is ensured that equipment can operate normally.In the present embodiment, described first point
Concentrate load from device 4 are as follows: 2.2t/h, concentration 30%.
The forced-circulation evaporator 5 includes forced-circulation evaporation entrance, forced-circulation evaporation outlet, the second steam inlet
With after-fractionating water out；First separate inlet opening is connected to the forced-circulation evaporation entrance.Solution is followed in the pressure
It is pushed in ring evaporator 5 by circulating pump, material is in internal flow velocity with higher, even if there is a small amount of solid also can be by material web
A possibility that walking, blocking can be reduced.In the present embodiment, the forced-circulation evaporator 5 is board-like forced-circulation evaporator, tool
There is heat transfer efficiency compared with the advantages of high, heat loss is small, ant-scaling resistance to salting-out.
Second separator 6 includes that the second separate inlet opening, the second separation outlet and the first steam (vapor) outlet, the pressure follow
Ring evaporation outlet is connected to second separate inlet opening.Specifically, second separator 6 is equipped with demister, described
In second separator 6 and steam (vapor) outlet is provided with two-stage demister.The setting of demister effectively prevents drop entrainment
The phenomenon that feed liquid, separates the mist in gas, improves operating condition, optimizes technic index, improves the quality of secondary steam, subtract
Few equipment corrosion phenomenon, extends the service life of equipment, it is ensured that equipment can operate normally.In the present embodiment, described
The concentrate load of two separators is 2.9t/h, concentration 45%.
The cooler crystallizer 7 includes crystallization entrance and crystallization outlet, and the separation outlet is connected to the crystallization entrance.
The cooler crystallizer 7 is OSLO crystallizer, and OSLO crystallizer is to reach supersaturation by external cooler is cooling to saturation feed liquid,
Entering suspension bed by vertical pipe again enables crystal to grow up, due to the special construction of OSLO crystallizer, volume biggish
Grain contacts oversaturated solution preferred growth first.The crystal that therefore OSLO crystallizer is produced is big with volume, particle is uniform,
Production capacity is big.And have the advantages that operate continuously, labor intensity is low etc..
As preferred embodiment, liquidometer, liquid phase gas phase temperature sensor and pressure are provided on the cooler crystallizer 7
Force snesor can keep at any time the working condition of the cooler crystallizer under the standard of design.
As preferred embodiment, the bottom of the cooler crystallizer 7 is arc surface, improves feed liquid inside crystallizer
Flow regime.In addition, the also mountable liquidometer of the cooler crystallizer, and switched equipped with two position, it can liquidometer again
It plays a protective role when failure, can also be equipped with multiple visors, help the working condition for judging liquidometer.
The centrifuge 8 includes centrifugation entrance and centrifugation outlet, and the crystallization outlet is connected to the centrifugation entrance.
The vapour compression machine 9 includes that compression entrance and compression outlet, the steam (vapor) outlet are connected to the compression entrance,
The compression outlet is connected to the heat exchange steam inlet, and first distilled water outlet is connected to the distillation water inlet.?
In the present embodiment, it is 10.5t/h that the steam (vapor) outlet of first separator 4, which generates secondary steam amount, and temperature is 90 DEG C, described the
It is 1.5t/h that the steam (vapor) outlet of two separators 6, which generates secondary steam amount, and temperature is 90 DEG C, compressed through the vapour compression machine
Secondary steam is 110 DEG C, and the distillation water flow of first distilled water outlet and after-fractionating water out is 12t/h, and temperature is
110 degree, the distilled water discharging or reuse amount of the after-fractionating water out are 12t/h, and temperature is 35 DEG C.
It further include mother liquor tank 10 as preferred embodiment, the mother liquor tank 10 includes mother liquor entrance and mother liquor outlet, institute
Stating centrifuge 8 further includes centrifugation liquid outlet, and the centrifugation liquid outlet is connected to the mother liquor entrance, and second separator 6 is also
Including refluxing opening, the mother liquor outlet is connected to the refluxing opening.In the present embodiment, the mother liquid flow rate of the mother liquor outlet is
2.2t/h, concentration are as follows: 30%.
As shown in Fig. 2, Fig. 2 is the flow chart of ammonium chloride solution processing method of the present invention.
The ammonium chloride solution processing method of ammonium chloride solution processing system of the present invention the following steps are included:
S1: ammonium chloride solution enters the preheater and is preheated；The feed rate of the preheater 2 is 12.7t/h, dense
Degree is 5%, and temperature is 25 DEG C.
S2: the ammonium chloride solution by preheating enters the falling film evaporator and is evaporated；
S3: entering in first separator by the ammonium chloride solution of falling film evaporator and separated, and isolated two
Secondary steam and ammonium chloride concentrate；The concentrate load of first separator 4 are as follows: 2.2t/h, concentration 30%.
S4: enter the forced-circulation evaporator by the ammonium chloride concentrate of first separator and be evaporated；
S5: entering in second separator by the ammonium chloride concentrate of the forced-circulation evaporator and separated,
Secondary steam and ammonium chloride concentrate are obtained again；The concentrate load of second separator is 2.9t/h, and concentration is
45%.
S6: the ammonium chloride concentrate by secondary separation enters the cooler crystallizer and carries out crystallisation by cooling；
S7: the ammonium chloride concentrate after crystallisation by cooling enters the centrifuge and is separated by solid-liquid separation, and obtains chloride solid
Material.In the present embodiment, solids exit amount is 0.7t/h (7% moisture content).
S8: the secondary steam that first separator and the second separator generate enters the vapour compression machine and is pressed
Contracting is condensed into distilled water subsequently into the falling film evaporator, and the distilled water is discharged by the preheater.
Compared with the prior art, the embodiment of the present application has the following technical effect that or advantage:
1, ammonium chloride solution processing system of the present invention includes preheater, falling film evaporator, the first separator, forces
Circulating evaporator, the second separator, cooler crystallizer, centrifuge and vapour compression machine, by using falling liquid film and forced circulation
MVR evaporation, material are introduced into falling film evaporator and are concentrated into the primary decrement of saturation, enter back into forced-circulation evaporation condensing crystallizing, make
The inventory obtained into forced-circulation evaporator is reduced, and reduces the internal circulating load of material in a device, to reduce energy consumption, both
It can achieve the purpose that evaporating, concentrating and crystallizing, and energy-efficient effect can be reached.
2, the fore filter can go out the solid suspension of material.
3, board-like forced-circulation evaporator has the advantages that heat transfer efficiency compared with high, heat loss is small, ant-scaling resistance to salting-out.
4, liquidometer, liquid phase gas phase temperature sensor and the pressure sensor being arranged on the cooler crystallizer can be at any time
Keep the working condition of the cooler crystallizer under the standard of design.
5, the bottom of the crystallizer is arc surface, improves flow regime of the feed liquid inside crystallizer.
6, using ammonium chloride solution processing method of the present invention, it is highly suitable for that treating capacity is big, complicated component, concentration
Materials not high and containing soluble solids.It is evaporated using falling liquid film and board-like forced circulation MVR, evaporation and concentration knot can be reached
Brilliant purpose, and energy-efficient effect can be reached.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.
Claims (8)
1. a kind of ammonium chloride solution processing system characterized by comprising
Preheater, the preheater include preheating entrance, preheating outlet, distillation water inlet and third distilled water outlet；
Falling film evaporator, the falling film evaporator include falling film evaporation entrance, falling film evaporation outlet, the first steam inlet and first
Distilled water outlet, the preheating outlet are connected to the falling film evaporation entrance；
First separator, first separator includes the first separate inlet opening, the first separation exports and the first steam (vapor) outlet, described
Falling film evaporation outlet is connected to first separate inlet opening；
Forced-circulation evaporator, the forced-circulation evaporator include forced-circulation evaporation entrance, forced-circulation evaporation outlet, the
Two steam inlets and after-fractionating water out；First separation outlet is connected to the forced-circulation evaporation entrance；
Second separator, second separator includes the second separate inlet opening, the second separation exports and the first steam (vapor) outlet, described
Forced-circulation evaporation outlet is connected to second separate inlet opening；
Cooler crystallizer, the cooler crystallizer include that crystallization entrance and crystallization export, second separation outlet and the knot
Brilliant entrance connection；
Centrifuge, the centrifuge include centrifugation entrance and centrifugation outlet, and the crystallization outlet is connected to the centrifugation entrance；
Vapour compression machine, the vapour compression machine include compression entrance and compression outlet, and first steam (vapor) outlet and second are steamed
Vapor outlet is connected to the compression entrance respectively, the compression outlet respectively with first steam inlet and the second steam inlet
Connection, first distilled water outlet and after-fractionating water out are connected to the distillation water inlet respectively.
2. ammonium chloride solution processing system according to claim 1, it is characterised in that: it further include mother liquor tank, the mother liquor
Tank includes mother liquor entrance and mother liquor outlet, and the centrifuge further includes centrifugation liquid outlet, the centrifugation liquid outlet and the mother liquor
Entrance connection, second separator further includes refluxing opening, and the mother liquor outlet is connected to the refluxing opening.
3. ammonium chloride solution processing system according to claim 1, it is characterised in that: it further include fore filter, it is described
Fore filter includes that filtering entrance and filtering outlet, the filtering outlet are connected to the preheating entrance.
4. ammonium chloride solution processing system according to claim 1, it is characterised in that: first separator and second point
Demister is provided with from interior.
5. ammonium chloride solution processing system according to claim 1, it is characterised in that: the forced-circulation evaporator is plate
Formula forced-circulation evaporator.
6. ammonium chloride solution processing system according to claim 1, it is characterised in that: be provided with liquid on the cooler crystallizer
Position meter, liquid phase gas phase temperature sensor and pressure sensor.
7. ammonium chloride solution processing system according to claim 1, it is characterised in that: the cooler crystallizer bottom is circle
Cambered surface.
8. a kind of ammonium chloride solution processing method, which is characterized in that the ammonium chloride solution processing method passes through such as claim 1
Any one of~7 ammonium chloride solution processing systems obtain, the ammonium chloride solution processing method the following steps are included:
Ammonium chloride solution enters the preheater and is preheated；
Ammonium chloride solution by preheating enters the falling film evaporator and is evaporated；
By falling film evaporator ammonium chloride solution enter first separator in separated, isolated secondary steam and
Ammonium chloride concentrate；
Enter the forced-circulation evaporator by the ammonium chloride concentrate of first separator to be evaporated；
Enter in second separator by the ammonium chloride concentrate of the forced-circulation evaporator and separated, is obtained again
Secondary steam and ammonium chloride concentrate；
Ammonium chloride concentrate by secondary separation enters the cooler crystallizer and carries out crystallisation by cooling；
Ammonium chloride concentrate after crystallisation by cooling enters the centrifuge and is separated by solid-liquid separation, and obtains chloride solid material；
The secondary steam that first separator and the second separator generate enters the vapour compression machine and is compressed, then into
Enter the falling film evaporator and be condensed into distilled water, the distilled water is discharged by the preheater.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110372007A (en) * | 2019-07-25 | 2019-10-25 | 山东亿盛实业股份有限公司 | The device and method of continuous separating ammonium chloride and sodium chloride |
| CN110482740A (en) * | 2019-08-16 | 2019-11-22 | 联峰钢铁（张家港）有限公司 | A kind of waste acid processing method |
| CN111268846A (en) * | 2020-03-30 | 2020-06-12 | 浙江红狮环保股份有限公司 | Method for purifying waste incineration fly ash process salt-containing wastewater |
| CN111302419A (en) * | 2020-01-06 | 2020-06-19 | 中伟新材料股份有限公司 | Process for solving problem of high evaporation boiling point of ammonia chloride by utilizing MVR |
| CN111905398A (en) * | 2020-06-26 | 2020-11-10 | 中国轻工业长沙工程有限公司 | Process for producing nickel cobalt salt and ammonium salt by continuous crystallization |
| CN113562914A (en) * | 2021-07-19 | 2021-10-29 | 常州乐研分离技术有限公司 | High-concentration ammonium sulfate waste water concentration freezing crystallization device |
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