CN206535223U - A kind of multiple-effect evaporation crystal system for handling zinc abstraction water - Google Patents
A kind of multiple-effect evaporation crystal system for handling zinc abstraction water Download PDFInfo
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- CN206535223U CN206535223U CN201621161597.9U CN201621161597U CN206535223U CN 206535223 U CN206535223 U CN 206535223U CN 201621161597 U CN201621161597 U CN 201621161597U CN 206535223 U CN206535223 U CN 206535223U
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Abstract
The utility model discloses a kind of multiple-effect evaporation crystal system for handling zinc abstraction water, including feed reservoir, condense water preheater, triple effect evaporator, 1st effective evaporator, 2nd effect evaporator, thickener, centrifuge, mother liquor tank, forecooler, crystallizer, thickener and centrifuge, the feed reservoir, condense water preheater, triple effect evaporator, 1st effective evaporator, 2nd effect evaporator, thickener, centrifuge, mother liquor tank, forecooler, crystallizer, thickener and centrifuge are sequentially connected by pipeline, the centrifuge is divided into two branch roads, one branch road is connected with feed reservoir, another branch road and mother liquor tank, condense water preheater, 1st effective evaporator, 2nd effect evaporator, thickener, centrifuge is sequentially connected, mother liquor tank is connected between the centrifuge and 2nd effect evaporator.The multiple-effect evaporation crystal system of the processing zinc abstraction water, efficiently separates sal prunella, energy-saving and environmental protection, zero discharge of industrial waste water.
Description
Technical field
The utility model belongs to evaporation and crystallization system technical field, and in particular to a kind of multiple-effect evaporation of processing zinc abstraction water
Crystal system.
Background technology
China is production and the consumption big country of a zinc abstraction.With the development of national zinc abstraction project, take with environment
With the high efficiency based on resource bearing the ability, low energy consumption, low stain, low emission Economic Development Mode, be modern industry
Unique acceptable sustainable development path.The area of great Northwest dry and rainless is particularly in, water resource is recycled and environment
Protection problem becomes increasingly conspicuous.It can be said that the environmental issue of waste water, the problem of be development pattern and energy-saving and emission-reduction after all.Will
The environmental issue of coal chemical industry is solved, first has to solve the problem of high salt water harnessing is with discharge.
I can reach 500t/d at company's haline water discharge capacity, be one of current anxious major issue for treating needs solution.It is high
Salt waste water is derived from drying pond, is the high salt concentrated water after washing zinc oxide twice, year producing days 90 days, remaining time-triggered protocol
Brine waste from full factory's other systems is such as：The two system waste acid of sulfuric acid one, electricity generation boiler, melting furnace waste heat boiler sewer,
Flue gas desulfurization recirculated water etc..
The high salt water treatment technology generally used in zinc abstraction industry at this stage is membrane separation technique.Membrane separation technique is profit
With film the new separation skill of target substance is separated, purifies and concentrates to the difference of each component selective penetrated property energy in mixture
Art.At present, the membrane separation technique being had been widely used in chemical industry and petroleum industry field has five kinds, is ultrafiltration, micro-filtration respectively, receives
Filter, electrodialysis and counter-infiltration.Big I according to desalting ability is carried out Preliminary division, i.e. micro-filtration ＜ ultrafiltration ＜ nanofiltrations≤electricity
Dialysis ＜ counter-infiltrations.
(1) ultrafiltration, micro-filtration, Nanofiltration Membrane Separation Technology ultrafiltration, micro-filtration, nanofiltration be mainly used in gas, liquid particulate, bacterium and
The retention of other pollutants is removed, and minimum molecular cut off is up to 80~1000Dal.Especially to standard organic matter and NaCl,
The rejection of MgSO4, CaCl2 solution reaches as high as 90%, can effectively go relatively large such as oil removal (SS), colloid
Grain thing, to reach the purpose of purification, separation, concentration.But the desalting effect of above technology is unsatisfactory, and it may generally serve as feed liquid
Clarification, security personnel's filtering, air sterilization, isolation and purification of larger molecular organicses etc..
(2) electrodialysis and reverse osmosis membrane separation technology
Electrodialysis and counter-infiltration are the two methods commonly used in desalting technology.
The former is that, using potential difference as motive force, the latter is then the membrane separating process using osmotic pressure as motive force.Due to
EDR technology power consumptions are big, processing cost is high, operating experience is not enough, recycle-water rate is not universal high.Reverse osmosis membrane separation technology is also deposited
The problems such as the fouling membrane treated needs and solved, blocking, short burn into service life is worried, especially when feedwater TDS is higher than
During 6000mg/l, its salt rejection rate can drastically decline.
Membrane separation technique is very high to later stage operation cost, easy secondary pollution.Sal prunella in haline water etc. can not be extracted, made
Process product is discarded, and the concentrated water produced needs post-processing, it is impossible to reach " zero-emission " index.
Utility model content
The purpose of this utility model is to provide a kind of multiple-effect evaporation crystal system for handling zinc abstraction water, above-mentioned to solve
The problem of being proposed in background technology.
To achieve the above object, the utility model provides following technical scheme：A kind of multiple-effect evaporation for handling zinc abstraction water
Crystal system, including feed reservoir, condensation water preheater, triple effect evaporator, 1st effective evaporator, 2nd effect evaporator, thickener, centrifugation
Machine, mother liquor tank, forecooler, crystallizer, thickener and centrifuge, the feed reservoir, condensation water preheater, triple effect evaporator, one
Effect evaporator, 2nd effect evaporator, thickener, centrifuge, mother liquor tank, forecooler, crystallizer, thickener and centrifuge pass through pipeline
It is sequentially connected, the centrifuge is divided into two branch roads, a branch road is connected with feed reservoir, another branch road is preheated with mother liquor tank, condensed water
Device, 1st effective evaporator, 2nd effect evaporator, thickener, centrifuge are sequentially connected, and are connected between the centrifuge and 2nd effect evaporator
There is mother liquor tank.
Technique effect of the present utility model and advantage：The multiple-effect evaporation crystal system of the processing zinc abstraction water, invests low, energy
Consumption is low：Multi-effect evaporator is that several evaporators connect indirect steam use produced when being evaporated in operation, previous evaporator
Make the heating steam of latter evaporator, heat energy has been used repeatedly, significantly decrease heat energy consumption；Truly accomplish
Zero-emission：Salt solution is kept completely separate, and solid be able to can sell as product；Steam finally condenses recycling；Increase is extra
Profit：Obtain meeting the anhydrous sodium sulfate and sodium chloride of technical grade from waste water, not only mitigate reclaimed water sewage disposal burden, also carry
Process product is taken to bring profit to company；It is simple, convenient：The supporting DCS control systems of Multi-effect evaporation crystallizer, to the whole series system
System provides safe and stable, continuous and steady operation advantage.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
The utility model provides a kind of multiple-effect evaporation crystal system of processing zinc abstraction water as shown in Figure 1, including original
Material pond, condensation water preheater, triple effect evaporator, 1st effective evaporator, 2nd effect evaporator, thickener, centrifuge, mother liquor tank, precooling
Device, crystallizer, thickener and centrifuge, the feed reservoir, condensation water preheater, triple effect evaporator, 1st effective evaporator, two effects are steamed
Hair device, thickener, centrifuge, mother liquor tank, forecooler, crystallizer, thickener and centrifuge are sequentially connected by pipeline, it is described from
Scheming is divided into two branch roads, and a branch road is connected with feed reservoir, another branch road and mother liquor tank, condensation water preheater, 1st effective evaporator, two
Effect evaporator, thickener, centrifuge are sequentially connected, and mother liquor tank is connected between the centrifuge and 2nd effect evaporator.
A point salt operation is completed using technique in three-effect countercurrent evaporation crystallizer, by accurate technology Calculation, in three-effect counter flow behaviour
Substantial amounts of sodium sulfate crystal is crystallized out in an effect in work, now the temperature of an effect solution is 100-110 DEG C, is high temperature crystallization sulphur
Sour sodium, when sodium chloride is close to saturation, timely produce sodium sulphate crystalline solid, and sodium chloride saturated solution (saturated solution
In be practically free of the crystal of sodium sulphate), the saturated solution of sodium chloride is transported in sodium chloride flash evaporation crystallizer again, flash crystallization
Temperature in device is 55-65 DEG C, and the salt wherein crystallized out in flash crystallization is divided into sodium chloride, and timely produces sodium chloride knot
Crystal, has completed the separation of sodium sulphate and sodium chloride.This scheme make use of sodium sulphate solubility with temperature raise and reduce with
And the high temperature evaporation that sodium chloride solubility is designed the characteristics of raised with the reduction of temperature crystallizes out sodium sulphate, decrease temperature crystalline
Go out the design of sodium chloride.
In this system, the salt that high temperature crystallization is isolated is divided into sodium sulphate, and the salt that low temperature crystallization comes out is divided into sodium chloride.
Process route is first to use triple effect mixed flow evaporation operation, and its a large amount of water evaporation is fallen to obtain to meet the anhydrous of technical grade
Sodium sulphate.Be then centrifuged for mother liquor goes freezing and crystallizing to obtain sal glauberi (returning to preceding technique) again, and remaining feed liquid arrives chlorination again
Sodium economic benefits and social benefits following current evaporator continues evaporation and obtains industrial grade sodium chloride.
Its idiographic flow is described below：Material liquid is conveyed by feeding pump, after condensation water preheater, into triple effect evaporation
Device is concentrated, and delivering into 1st effective evaporator by triple effect discharging pump after concentration is concentrated by evaporation, and the feed liquid after concentration passes through one, two
Pressure difference enters 2nd effect evaporator continuation evaporation and concentration between imitating evaporator, is concentrated by evaporation the high temperature discharging to certain require；Feed liquid by
Two effect discharging pumps are delivered to thickener, are separated containing solid concentrated solution through centrifuge, solid phase is sodium sulfate crystal, centrifuge mother liquor enters
Enter mother liquor tank, mother liquor is delivered to freezing workshop section through mother liquor pump；In order to ensure that sodium chloride is not separated out during analysis nitre, by the pipeline that discharges
Tracing thermal-insulating is carried out, thickener carries jacket heat-preservation；Sodium sulfate crystal after centrifugation is packed into packing machine, obtains anhydrous slufuric acid
Sodium product.
Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, this is not limited to
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify to the technical scheme described in foregoing embodiments, or to which part technical characteristic
Equivalent substitution is carried out, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements made etc.,
It should be included within protection domain of the present utility model.
Claims (1)
1. it is a kind of handle zinc abstraction water multiple-effect evaporation crystal system, including feed reservoir, condensation water preheater, triple effect evaporator,
1st effective evaporator, 2nd effect evaporator, thickener, centrifuge, mother liquor tank, forecooler, crystallizer, thickener and centrifuge, it is special
Levy and be：The feed reservoir, condensation water preheater, triple effect evaporator, 1st effective evaporator, 2nd effect evaporator, thickener, centrifugation
Machine, mother liquor tank, forecooler, crystallizer, thickener and centrifuge are sequentially connected by pipeline, and the centrifuge is divided into two branch roads,
One branch road is connected with feed reservoir, another branch road and mother liquor tank, condensation water preheater, 1st effective evaporator, 2nd effect evaporator, stiff
Device, centrifuge are sequentially connected, and mother liquor tank is connected between the centrifuge and 2nd effect evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621161597.9U CN206535223U (en) | 2016-11-01 | 2016-11-01 | A kind of multiple-effect evaporation crystal system for handling zinc abstraction water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621161597.9U CN206535223U (en) | 2016-11-01 | 2016-11-01 | A kind of multiple-effect evaporation crystal system for handling zinc abstraction water |
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| CN206535223U true CN206535223U (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621161597.9U Active CN206535223U (en) | 2016-11-01 | 2016-11-01 | A kind of multiple-effect evaporation crystal system for handling zinc abstraction water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044596A (en) * | 2021-10-12 | 2022-02-15 | 铜陵有色金属集团股份有限公司 | Device and method for separating sodium sulfate and sodium nitrate from industrial salt-containing wastewater |
-
2016
- 2016-11-01 CN CN201621161597.9U patent/CN206535223U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044596A (en) * | 2021-10-12 | 2022-02-15 | 铜陵有色金属集团股份有限公司 | Device and method for separating sodium sulfate and sodium nitrate from industrial salt-containing wastewater |
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