CN106477796A - Desulfurization wastewater treatment system and method - Google Patents
Desulfurization wastewater treatment system and method Download PDFInfo
- Publication number
- CN106477796A CN106477796A CN201611193432.4A CN201611193432A CN106477796A CN 106477796 A CN106477796 A CN 106477796A CN 201611193432 A CN201611193432 A CN 201611193432A CN 106477796 A CN106477796 A CN 106477796A
- Authority
- CN
- China
- Prior art keywords
- mother liquor
- evaporation
- crystallization
- forced circulation
- desulfurization wastewater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Abstract
The invention provides a kind of desulfurization wastewater treatment system and method, the method includes the operations such as good antiscale property preheating, the crystallization of evaporation and concentration, evaporative crystallization, catalytic electrolysis, single effect evaporation；The system includes：Good antiscale property pre-heating system, for carrying out heat exchange intensification to desulfurization wastewater, and guarantees calcium sulfate non flouling behaviour in warm；Evaporation and crystallization system, is concentrated by evaporation in order to the desulfurization wastewater to heating up, and crystallizes and separate mixed salt crystallization and mother liquor to produce；MVR steam compression system, in order to provide steam to evaporation and crystallization system, receives and processes the indirect steam of generation, to be supplied to evaporation and crystallization system recycling；Mother liquid disposal system, mother liquor in order to discharge to evaporation and crystallization system carries out catalytic electrolysis, removes the COD in most of mother liquor, and carries out the crystallization of secondary separation mixed salt and mother liquor, the mother liquor of discharge is exported to evaporation and crystallization system and carries out recycling processing, to reach the requirement of desulfurization wastewater " zero-emission ".
Description
Technical field
The present invention relates to field of industrial waste water treatment, especially relates to a kind of desulfurization wastewater treatment system and method.
Background technology
Desulfurization wastewater emission problem is subject to global extensive concern in recent years, and China promulgates for 2006《Thermal power plant's stone
Lime stone-gypsum wet desulfurization waste water quality Con trolling index》(DL/T 997 2006) though in not to sulfate radical and chlorion etc. arrange
The standard of putting makes requirement, but the desulfurization wastewater processed using traditional handicraft has not allowed directly discharge, so urgently studying desulfurization
The New Process for Treatment of waste water.
At present the handling process of China's desulfurization wastewater mainly have Typical physical chemical precipitation method, chemical precipitation-micro-filtration embrane method,
Multistage filtering+hyperfiltration.As desulfurization waste water quality is poor, counter-infiltration and pretreating process need interpolation medicament useless to desulfurization
In water, easy scale forming matter (calcium sulfate) is processed, and high cost is not yet promoted.Additionally, handing over for other technologies such as ion
Change and a large amount of discussions have been also carried out with artificial swamp, but successfully prospect seems little.
In sum, the sector is still finding a reliable and high performance desulfurization wastewater treatment technology.
Content of the invention
It is an object of the invention to provide a kind of method for treating desulfurized wastewater and system, are given up with solving desulfurization in prior art
Impact of the easy fouling of calcium sulfate present in water treatment procedure to processing system, and the problems such as operating cost is high.
The method for treating desulfurized wastewater that the present invention is provided, comprises the following steps：
Step 1, good antiscale property are preheated, and are carried out heat exchange intensification using good antiscale property pre-heating system to desulfurization wastewater, and are guaranteed to take off
Calcium sulfate non flouling behaviour in warm in sulphur waste water；
Step 2, is concentrated by evaporation, concentrates the desulfurization wastewater of preheating using forced-circulation evaporator；
Step 3, evaporative crystallization, desulfurization wastewater concentrate is evaporated to supersaturation using forced circulation crystallizer, makes mixed salt
Crystal is separated out, and is separated crystalline solid with mother liquor by centrifuge；
Step 4, catalytic electrolysis, the COD of the concentrated mother liquor of step 2 China and foreign countries row is carried out catalysis oxidation, makes concentrated mother liquor
Most COD decompose, to reduce the COD of concentrated mother liquor；
Step 5, single effect evaporation are crystallized, using single-action forced-circulation evaporation crystallizer, the mother liquor concentrations that will be discharged in step 3
To being supersaturated, separate out mixed salt and crystalline solid and mother liquor are isolated by centrifuge, the mother liquor after centrifugation returns again to single-action to be forced to follow
Ring crystallizing evaporator is recycled.
Further, throwing in the forced circulation crystallizer has solid gypsum particle, makes mother liquor using gypsum seed method
In Ca2+And SO2 -4Precipitation is condensed upon on solid gypsum particle and crystallizes, to avoid calcium sulfate from producing fouling.
A kind of desulfurization wastewater treatment system that the present invention is provided, including good antiscale property pre-heating system, evaporation and crystallization system, MVR
Steam compression system and mother liquid disposal system；
The good antiscale property pre-heating system is used for carrying out heat exchange intensification to desulfurization wastewater, rises to and meets entrance evaporative crystallization system
The temperature of system, and guarantee calcium sulfate non flouling behaviour in warm；
The evaporation and crystallization system is concentrated in order to the desulfurization wastewater evaporation to heating up and supersaturation to produce crystallization, and is separated
Mixed salt crystallization and mother liquor；
The MVR steam compression system is in order to provide steam to evaporation and crystallization system, and receives the evaporation and crystallization system
The indirect steam produced in middle desulfurization wastewater evaporation process, and lift the temperature and pressure of indirect steam and be supplied to as heating source
Evaporation and crystallization system is recycled；
The mother liquid disposal system is in order to carry out catalytic electrolysis to remove mother to the mother liquor that the evaporation and crystallization system is discharged
Most COD in liquid, and the crystallization of secondary separation mixed salt and mother liquor is carried out, the mother liquor that discharges through mother liquid disposal system is exported to steaming
Sending out crystal system carries out recycling processing.
Further, the good antiscale property pre-heating system includes tubular heat exchanger and the zirconium oxide circulatory system, the oxidation
The zirconium circulatory system passes through pipeline communication with tubular heat exchanger；
The zirconium oxide circulatory system can be discharged zirconia particles and be mixed with desulfurization wastewater in the duct, and mixed material exists
Irregularly flow in tubular heat exchanger, frictional impact is produced with tube wall, to slow down suction of the calcium sulfate scaling composition on wall
Adventitious deposit.
Further, the evaporation and crystallization system include one-level forced circulation heater, two grades of forced circulation heaters, two
Level forced-circulation evaporator, forced circulation crystallizer, thickener, centrifuge, mother liquor tank and mother liquor reflux pump；
The one-level forced circulation heater is in order to heat to the mixed material that good antiscale property pre-heating system is discharged, and incites somebody to action
Material is delivered to forced-circulation evaporator, and the two-stage forced-circulation evaporator completes 1% stoste is concentrated into 28% original
Liquid, the stoste of 28% through forced-circulation evaporator discharge are delivered to two grades of forced circulation heaters and are heated, and will add
Stoste after heat is delivered to forced circulation crystallizer, and the forced circulation crystallizer completes the supersaturation to stoste and concentrates generation knot
Crystalline substance, is transported to thickener by regulating valve with switch valve control, mother liquor and magma is separated, is isolated subsequently into centrifuge
Mixed salt is crystallized, and the mother liquor part after centrifugation is delivered in mother liquor tank, then is delivered to two grades of forced circulation through mother liquor reflux pump and is added
Hot device is delivered to after carrying out heat exchange in forced circulation crystallizer carries out recycling processing, and another part mother liquor after centrifugation is delivered to
In mother liquid disposal system.
Further, the MVR steam compression system includes vapour compression machine, drives variable-frequency motor and frequency converter；
The vapour compression machine is connected with two-stage forced-circulation evaporator, forced circulation crystallizer, and the two-stage is forced
The indirect steam that circulating evaporator, forced circulation crystallizer are produced is entered in vapour compression machine by pipeline, the both vapor compression
Machine is done work to indirect steam, is lifted vapor (steam) temperature, then steam is delivered to one-level forced circulation heater and two grades of pressures are followed
Ring heater, to realize recycling for the latent heat of indirect steam.
Further, also include condensate water pot, it is cold that the two-stage forced-circulation evaporator, forced circulation crystallizer are discharged
Solidifying water is input into condensate water pot by pipeline, condensed water is delivered in good antiscale property pre-heating system by condensate water pot, useless to desulfurization
Water carries out heat exchange.
Further, the mother liquid disposal system includes catalytic electrolysis device, calandria preheater, single-action forced circulation knot
Brilliant device, thickener, centrifuge, mother liquor tank and mother liquor reflux pump, forced circulation heater；
The a part of mother liquor that discharges through the evaporation and crystallization system is delivered to catalytic electrolysis device by pump and is electrolysed simultaneously
Part COD is removed in the presence of catalyst, then is delivered to single-action forced circulation crystallizer after calandria preheater heat exchange
In, mother liquid evaporation being crystallized using steam mode of heating, a steam part for evaporation is recycled and enters heat pump, and another part enters
Enter calandria preheater, mixed salt is separated by crystalline solid by centrifuge, the mother liquor after centrifugation is delivered in mother liquor tank, by mother liquor
Reflux pump is delivered to forced circulation heater, and the mother liquor after forced circulation heater heating is delivered to single-action forced circulation
Crystallizer carries out recycling processing.
Further, the steam that the single-action forced circulation crystallizer is discharged is delivered to calandria preheater and heat pump respectively
In, steam is provided by heat pump for forced circulation heater.
Further, it has been respectively communicated with the two-stage forced-circulation evaporator, the output pipe of forced circulation crystallizer
Separation of gypsum device.
Based on the method for treating desulfurized wastewater that technique scheme is provided：
Heat exchange intensification is carried out using good antiscale property pre-heating system to desulfurization wastewater, and guarantee calcium sulfate in warm not
Meeting fouling, is damaged to the thermal balance of system with eliminating calcium oxide fouling；
Desulfurization wastewater is concentrated using evaporating and concentrating process；Concentrate is evaporated to by satiety using evaporative crystallization technique
With separate out mixed salt crystal, and crystalline solid separated with mother liquor by centrifuge；The mother liquor that centrifuge is separated is high COD
Saturation mixed salt mother liquor carries out catalytic electrolysis, makes part COD resolve into water and carbon dioxide, to reduce the COD of concentrate；Then sharp
Single effect evaporation crystallization processes are used, by mother liquor concentrations to being supersaturated, are separated out mixed salt and crystalline solid and mother liquor is isolated by centrifuge,
Mother liquor after centrifugation returns again to single-action forced-circulation evaporation crystallizer and is recycled, and reaches wanting for desulfurization wastewater " zero-emission "
Ask.
The desulfurization wastewater treatment system that the present invention is provided, including good antiscale property pre-heating system, evaporation and crystallization system, MVR steam
Compressibility and mother liquid disposal system；
Carry out heat exchange intensification to desulfurization wastewater using good antiscale property pre-heating system, and guarantee calcium sulfate in warm not
Meeting fouling, safeguards system thermal balance；
Evaporation and crystallization system is concentrated by evaporation in order to the desulfurization wastewater to heating up, and carries out supersaturation concentration to produce crystallization,
And separate mixed salt crystallization and mother liquor；MVR steam compression system is in order to provide steam to evaporation and crystallization system, and receives evaporative crystallization
The indirect steam produced in desulfurization wastewater evaporation process in system, and lift the temperature and pressure of indirect steam and carry as heating source
Supply evaporation and crystallization system is recycled；Mother liquid disposal system is in order to be electrolysed to the mother liquor that the evaporation and crystallization system is discharged
And the COD in partial mother liquid is removed in the presence of catalyst, and the crystallization of secondary separation mixed salt and mother liquor is carried out, through mother liquid disposal
The mother liquor that system is discharged is exported to evaporation and crystallization system and carries out recycling processing, is reached at reliable and high performance desulfurization wastewater
Reason process.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
Needed for embodiment or description of the prior art, accompanying drawing to be used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of method for treating desulfurized wastewater provided in an embodiment of the present invention；
Fig. 2 is the flow chart of desulfurization wastewater treatment system provided in an embodiment of the present invention；
Fig. 3 is the good antiscale property pre-heating system of desulfurization wastewater treatment system provided in an embodiment of the present invention, evaporation and crystallization system
Flow chart with MVR steam compression system；
Fig. 4 is the flow chart of the mother liquid disposal system of desulfurization wastewater treatment system provided in an embodiment of the present invention.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described enforcement
Example is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment obtained under the premise of creative work is not made by personnel, belongs to the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation of instruction such as " level ", " interior ", " outward " or position relationship be based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplify description, rather than indicate or the hint device of indication or element must with specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or hint relative importance.
List below is the water quality table of certain power plant desulfurization waste water：
Following information is mainly reflected from table：
Anion is mainly SO4 2-And Cl-.
Cation is mainly Mg, Ca and Na.
In desulfurization wastewater, Main Salts are magnesium sulfate, calcium sulfate, magnesium chloride and calcium chloride and a small amount of sodium salt and nitric acid
Salt.
TDS≤1%, solid content are very low.
pH：8～9.
COD：350～450ppm.
By being analyzed to the desulfurization wastewater, due to containing calcium sulfate in the raw water of desulfurization wastewater, calcium sulfate has inverse
Dissolubility, after intensification, calcium sulfate is easily crystallized, and crystal is easily attached on heating tubulation, reduces heat transfer efficiency, destroys the heat of system
Balance.
Therefore, the invention provides following method for treating desulfurized wastewater.
Fig. 1 is refer to, the method is comprised the following steps：
Step 1, good antiscale property are preheated, and are carried out heat exchange intensification using good antiscale property pre-heating system to desulfurization wastewater, and are guaranteed sulphur
Sour calcium non flouling behaviour in warm；
Step 2, is concentrated by evaporation, concentrates desulfurization wastewater using forced-circulation evaporator；Specifically strong using two-stage
The desulfurization wastewater of 1% solid content is concentrated into 28% solid content by circulating evaporator processed；Wherein, first order forced-circulation evaporator will
The desulfurization wastewater of 1% solid content is concentrated into 3.1% solid content；Second level forced-circulation evaporator is by the desulfurization of 3.1% solid content
Waste water concentrating is to 28% solid content.
Step 3, evaporative crystallization, the concentrate of 28% solid content is evaporated to supersaturation using forced circulation crystallizer, makes
Mixed salt crystal is separated out, and is separated crystalline solid (mixed salt) with mother liquor by centrifuge；
Step 4, catalytic electrolysis, the COD concentrated through high power is carried out catalysis oxidation, divides most COD in concentrated mother liquor
Xie Chengshui and carbon dioxide, to reduce below the COD to 200ppm of concentrated mother liquor；
Step 5, single effect evaporation are crystallized, and using single-action forced-circulation evaporation crystallizer, by mother liquor concentrations to being supersaturated, are separated out
Mixed salt simultaneously isolates crystalline solid and mother liquor by centrifuge, and the mother liquor after centrifugation returns again to single-action forced-circulation evaporation crystallizer and enters
Row is recycled.
Additionally, throw in forced circulation crystallizer having solid gypsum particle, the Ca in mother liquor is made using gypsum seed method2+
And SO2 -4Precipitation is condensed upon on solid gypsum particle and crystallizes, to avoid calcium sulfate from producing fouling.
Identical with dirty thing using crystal seed structure, plane of crystal is big compared with crystallizer material wall to the affinity of dirty thing, makes dense
The calcium sulfate molecule separated out in contracting liquid is preferentially attached on the calcium sulphate crystal particle of suspension, and sufficient amount of crystal seed, provide
Great plane of crystal, makes the degree of supersaturation of calcium sulfate in concentrate eliminate in time, so as to avoid calcium sulfate on wall
Nucleation and growth, improve forced circulation crystallizer service life.
Fig. 2 to Fig. 4 is refer to, the present invention provides a kind of desulfurization wastewater treatment system, the bag for above-mentioned processing method
Include good antiscale property pre-heating system, evaporation and crystallization system, MVR steam compression system and mother liquid disposal system；
The good antiscale property pre-heating system is used for for desulfurization wastewater carrying out heat exchange intensification；Desulfurization wastewater is risen to and meets entrance
The temperature of evaporation and crystallization system, and guarantee calcium sulfate non flouling behaviour in warm；
The evaporation and crystallization system is concentrated by evaporation in order to the desulfurization wastewater to heating up, and carries out supersaturation concentration to produce knot
Crystalline substance, and separate mixed salt crystallization and mother liquor；
The MVR steam compression system is in order to provide steam to evaporation and crystallization system, and receives the evaporation and crystallization system
The indirect steam produced in middle desulfurization wastewater evaporation process, and lift the temperature and pressure of indirect steam and be supplied to as heating source
Evaporation and crystallization system is recycled；
The mother liquid disposal system is in order to be electrolysed and in catalyst to the mother liquor that the evaporation and crystallization system is discharged
The lower COD removed in partial mother liquid of effect, and the crystallization of secondary separation mixed salt and mother liquor is carried out, through the mother that mother liquid disposal system is discharged
Liquid is exported to evaporation and crystallization system and carries out recycling processing.
Specifically：
Fig. 3 is refer to, the good antiscale property pre-heating system includes tubular heat exchanger and the zirconium oxide circulatory system, the oxidation
The zirconium circulatory system passes through pipeline communication with tubular heat exchanger；
The zirconium oxide circulatory system is discharged zirconia particles and is mixed with desulfurization wastewater in the duct, and mixed material is in tubulation
Flow in formula heat exchanger, slow down absorption deposition of the dirt composition on wall, increase convective heat-transfer coefficient.
The problem of calcium sulfate scaling is the greatest problem faced in this water process, and it is related to the feasible of process route operation
Property and reliability.
Due to containing calcium sulfate in the raw water of desulfurization wastewater, calcium sulfate has inverse dissolubility, and after intensification, calcium sulfate is easily tied
Crystalline substance, crystal are easy to be attached on heating tubulation, reduce heat transfer efficiency, destroy the thermal balance of system.For the desulfurization wastewater
Water analysis, in order to reduce operating cost and reduce cost of investment, the technical program do not go the biography of removing calcium and magnesium using Dual alkali
System method, but good antiscale property preheating technology is adopted in warm-up phase, it is ensured that in warm-up phase heat exchanger non-scaling.
The technology that the regenerator section of the application is combined with tubular heat exchanger using the zirconium oxide circulatory system, material are entered
Mix with zirconia particles (φ 1mm) before preheater (tubular heat exchanger), material is flowed in tubulation, the calcium sulfate of precipitation is brilliant
Rub between body and zirconia solid particle, collide, will also rub between solid particle and tube wall, collide etc. and be existing
As, and bounce of the solid particle near heat exchanging pipe wall, the disturbance to flow boundary layer is increased, can prevent or slow down dirt
Absorption deposition of the dirty composition on wall, with cleaning and anti-scaling action, while the friction of solid particle and heat exchange tube wall, collision
The boundary layer of flow of fluid will be destroyed, reduce the thermal resistance of convection heat transfer' heat-transfer by convection, increase convective heat-transfer coefficient.
Refer to Fig. 3, the evaporation and crystallization system include one-level forced circulation heater, two grades of forced circulation heaters,
Two-stage forced-circulation evaporator, forced circulation crystallizer, thickener, centrifuge, mother liquor tank and mother liquor reflux pump；
The one-level forced circulation heater is in order to heat to the mixed material that good antiscale property pre-heating system is discharged, and incites somebody to action
Material is delivered to two-stage forced-circulation evaporator, and wherein, first order forced-circulation evaporator will be dense for the desulfurization wastewater of 1% solid content
It is reduced to 3.1% solid content；The desulfurization wastewater of 3.1% solid content is concentrated into 28% solid content by second level forced-circulation evaporator,
The stoste of 28% through the discharge of two-stage forced-circulation evaporator is delivered to two grades of forced circulation heaters and is heated, after heating
Material be delivered to forced circulation crystallizer, the forced circulation crystallizer complete supersaturation concentrate produce crystallization, evaporation knot
In crystallographic system system, the degree of supersaturation for controlling solution is most critical, it is ensured that crystalline particle is progressively grown up in Metastable zone, reaches setting
After density, thickener is transported to by regulating valve with switch valve control, mother liquor and magma are separated, improve the solid-to-liquid ratio of magma
(50%), the mixed salt crystallization of about 5% water content is isolated subsequently into centrifuge, and a part of mother liquor after centrifugation is delivered to mother liquor
In tank, then two grades of forced circulation heaters are delivered to through mother liquor reflux pump carry out being delivered in forced circulation crystallizer to enter after heat exchange
Row recycling processing.Another part mother liquor is delivered in mother liquid disposal system and is processed.
Wherein, when mother solution C OD of mother liquor tank reaches a certain amount of, need to evaporation and crystallization system outside drain, to ensure
System heat balance, it is ensured that evaporation and crystallization system stable operation.
Additionally, solving the problems, such as calcium sulfate fouling in forced circulation crystallizer using gypsum seed method in the system.Base
It is more than this principle of affinity of dissimilar substances in the affinity of material of the same race, solid gypsum little particle is evenly dispersed in by force
Ca in circulation crystallization device processed, in water2+And SO2 -4Condensed upon on solid gypsum nucleus first, crystallization is separated out.Then pass through gypsum
Separator is separated to the gypsum crystal in mother liquor.
Preferably, gypsum has been respectively communicated with two-stage forced-circulation evaporator, the output pipe of forced circulation crystallizer
Separator, in order to separate to the gypsum particle in system pipeline.
The MVR steam compression system includes vapour compression machine, drives variable-frequency motor and frequency converter；
The vapour compression machine is connected with two-stage forced-circulation evaporator, forced circulation crystallizer, and the two-stage is forced
The indirect steam that circulating evaporator, forced circulation crystallizer are produced is entered in vapour compression machine by pipeline, the both vapor compression
Machine is done work to indirect steam, is lifted vapor (steam) temperature, then steam is delivered to one-level forced circulation heater and two grades of pressures are followed
Ring heater, to realize recycling for the latent heat of indirect steam.
Vapour compression machine to indirect steam acting compression after, the temperature and pressure of outlet vapor all gets a promotion, temperature by
70 DEG C are increased to 84 DEG C, recycle as heating source.
As material is gradually risen in evaporating concentration process mid-boiling point, on comprehensive analysis energy consumption and equipment investment basis
On, this programme adopts high speed centrifugation vapour compression machine, and the compression temperature rise for providing is 14 DEG C, can overcome 8 DEG C of the elevation of boiling point, and
Stable guaranteed, energy consumption is relatively low.
The system also includes condensate water pot, the condensation that the two-stage forced-circulation evaporator, forced circulation crystallizer are discharged
Water is input into condensate water pot by pipeline, condensed water is delivered in good antiscale property pre-heating system, to desulfurization wastewater by condensate water pot
Carry out heat exchange.
As the mother liquor that the centrifuge in evaporation and crystallization system is separated is high COD saturation mixed salt mother liquor, which mainly becomes
It is divided into saturated solution of magnesium sulfate, magnesium chloride and calcium chloride solution.As the boiling point of magnesium chloride and calcium chloride is higher, evaporative crystallization system
The MVR evaporation technique that system is adopted can not process such waste water.Therefore, this programme using mother liquid disposal system to mother liquor at
Reason (i.e. the group technology of catalytic electrolysis technique and single-action steam raising), reaches the requirement of " zero-emission ".
Fig. 4 is refer to, the mother liquid disposal system includes catalytic electrolysis device, calandria preheater, single-action forced circulation
Crystallizer, thickener, centrifuge, mother liquor tank and mother liquor reflux pump, forced circulation heater；
The a part of mother liquor that discharges through the evaporation and crystallization system is delivered to catalytic electrolysis device by pump and is electrolysed simultaneously
Part COD is removed in the presence of catalyst, then is delivered to single-action forced circulation crystallizer after calandria preheater heat exchange
In, using steam mode of heating, a steam part for evaporation is recycled and enters heat pump, and another part enters tubular preheater,
Mixed salt is separated by crystalline solid by centrifuge, and centrifuge mother liquor is delivered in mother liquor tank, is delivered to pressure by mother liquor reflux pump and is followed
Ring heater, the mother liquor after forced circulation heater heating is delivered to single-action forced circulation crystallizer to be carried out at recycling
Reason.
Preferably, the steam that single-action forced circulation crystallizer is discharged is delivered in calandria preheater and heat pump respectively, is led to
Cross heat pump steam is provided for forced circulation heater.
Preferably, the forced circulation crystallizer adopted in the desulfurization wastewater treatment system that the present invention is provided, cylinder highly set
6 meters are set to, evaporating temperature is set to 70 degree, material is TA composite.Higher in view of calcium ions and magnesium ions, prevent calcium ions and magnesium ions from existing
The evaporation in-tube fouling of vapo(u)rization system, therefore design low-temperature evaporation temperature is 70 degree.
Its advantage is described below：
A) effective volume is big, is conducive to the elimination of feed liquid degree of supersaturation and the growth of crystal, and product granularity is big；
B) by the way of bottom tangent charging, floating washing is carried out to salt crystalline substance, the degree of supersaturation for reaching liquid level feed liquid disappears substantially
Lose, the inwall of crystallizing evaporator is difficult salt crust block, thus occur that block salt plugging probability is few, the cycle of operation is long；
C) in crystallizer, feed liquid short circuit temperature loss is little, and effective heat transfer temperature difference increases, and evaporation intensity is high；
D) circulatory system resistance is little, and circulating pump lift is low, and power consumption is few and reaches energy-saving purpose.
In addition, the system is controlled to various pieces using highly intelligentized automation control appliance and monitors.
The pattern of system control is divided into field control and remotely control both of which, control mode be divided into upper manually,
Upper automatic two ways.Field control can carry out automatic, manual control by touch-screen, and remote supervisory and controlling equipment can also be carried out
Automatically, control manually.
The correlation work such as control centre, mainly real-time detection motor, various pumps, motor-driven valve, flow, temperature, pressure, liquid level
Make the signal of parameter, determine the working condition of each several part, to reach the mesh that preheating, evaporation, clean-drain, shutdown etc. are automatically brought into operation
's.MVR vapo(u)rization system control centre is without damage by automatic alarming protection system equipment, keeps the dynamic equilibrium of system.On
Position machine monitoring system uses Siemens's WinCC control result, realizes powerful configuration work(by this configuration software
Energy：The windows display such as whole project total system figure, technological process picture, control flow total figure is most reasonably completed；Supervise in real time
Control dynamic process flow process, equipment running status, procedure parameter, the status display at each independent control station；Realize manually and automatically
Control two ways；Each warning of system and the automatic prompting of event, record, inquiry and warning etc.；Real-time tendency, historical trend
Check etc. trend；Related data printing etc. online, all information are all in the memory of the host computer of storage.
Lower computer control system adopts Siemens's S7-300 system, and the series of PLC is the tool that Siemens releases
In having, the automation platform of large-scale program storage capacity data structure.Lead with process automation is crossed as factory automation
The optimal automation platform in domain, it have optimal execute quick control of the velocity interpolation to field apparatus, powerful communication
Function is easy to the networking of large scale system to control, it is easy to accomplish the connection with other equipment；Powerful detail programming software can be high
The functions such as the realization communication of effect, PID are adjusted, various control computings.This project control system by the ether PORT COM of PLC with
Inverter communication, using PID control pattern, the rotating speed of accurate control drive motor for compressor；Manual, automatic two kinds of control is set
Mode is respectively used to manual repair apparatus and automated system operation；Realize the full-automatic work(such as feeding preheating, evaporation, emptying and cleaning
Energy.
Finally it should be noted that：Various embodiments above only in order to technical scheme to be described, rather than a limitation；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of method for treating desulfurized wastewater, it is characterised in that comprise the following steps：
Step 1, good antiscale property are preheated, and are carried out heat exchange intensification to desulfurization wastewater using good antiscale property pre-heating system, and are avoided desulfurization from giving up
In water, calcium sulfate produces fouling in warm；
Step 2, is concentrated by evaporation, concentrates the desulfurization wastewater of preheating using forced-circulation evaporator；
Step 3, evaporative crystallization, desulfurization wastewater concentrate is evaporated to supersaturation using forced circulation crystallizer, makes mixed salt crystal
Separate out, and crystalline solid is separated with mother liquor by centrifuge；
Step 4, catalytic electrolysis, the COD of the concentrated mother liquor of step 2 China and foreign countries row is carried out catalysis oxidation, makes the big of concentrated mother liquor
Part COD decomposes, to reduce the COD of concentrated mother liquor；
Step 5, single effect evaporation are crystallized, using single-action forced-circulation evaporation crystallizer, by the mother liquor concentrations that discharges in step 3 to mistake
Saturation, separates out mixed salt and isolates crystalline solid and mother liquor by centrifuge, and the mother liquor after centrifugation returns again to the steaming of single-action forced circulation
Send out crystallizer to be recycled.
2. method for treating desulfurized wastewater according to claim 1, it is characterised in that throw in the forced circulation crystallizer
There is solid gypsum particle, the Ca in mother liquor is made using gypsum seed method2+And SO2 -4Condense upon on solid gypsum particle and crystallize analysis
Go out, to avoid calcium sulfate from producing fouling.
3. a kind of desulfurization wastewater treatment system, it is characterised in that including good antiscale property pre-heating system, evaporation and crystallization system, MVR steam
Compressibility and mother liquid disposal system；
The good antiscale property pre-heating system is used for carrying out heat exchange intensification to desulfurization wastewater, rises to and meets entrance evaporation and crystallization system
Temperature, and guarantee calcium sulfate non flouling behaviour in warm；
The evaporation and crystallization system is concentrated in order to the desulfurization wastewater evaporation to heating up and supersaturation to produce crystallization, and separates mixed salt
Crystallization and mother liquor；
The MVR steam compression system in order to provide steam to evaporation and crystallization system, and receives de- in the evaporation and crystallization system
The indirect steam produced in sulphur waste water evaporation process, and lift the temperature and pressure of indirect steam and be supplied to evaporation as heating source
Crystal system is recycled；
The mother liquid disposal system is in order to carry out catalytic electrolysis to remove in mother liquor to the mother liquor that the evaporation and crystallization system is discharged
Part COD, and carry out the crystallization of secondary separation mixed salt and mother liquor, the mother liquor that discharges through mother liquid disposal system is exported to evaporative crystallization
System carries out recycling processing.
4. desulfurization wastewater treatment system according to claim 3, it is characterised in that the good antiscale property pre-heating system includes row
Pipe heat exchanger and the zirconium oxide circulatory system, the zirconium oxide circulatory system pass through pipeline communication with tubular heat exchanger；
The zirconium oxide circulatory system can be discharged zirconia particles and be mixed with desulfurization wastewater in the duct, and mixed material is in tubulation
Irregularly flow in formula heat exchanger, frictional impact is produced with tube wall, sunk with slowing down absorption of the calcium sulfate scaling composition on wall
Product.
5. desulfurization wastewater treatment system according to claim 4, it is characterised in that the evaporation and crystallization system includes one-level
Forced circulation heater, two grades of forced circulation heaters, two-stage forced-circulation evaporator, forced circulation crystallizer, thickener, from
Scheming, mother liquor tank and mother liquor reflux pump；
The one-level forced circulation heater in order to heat to the mixed material that good antiscale property pre-heating system is discharged, and by material
Forced-circulation evaporator is delivered to, the two-stage forced-circulation evaporator completes 1% stoste is concentrated into 28% stoste, warp
The stoste of the 28% of the forced-circulation evaporator discharge is delivered to two grades of forced circulation heaters and is heated, after heating
Stoste is delivered to forced circulation crystallizer, and the forced circulation crystallizer completes the supersaturation to stoste and concentrates generation crystallization, by
Regulating valve is transported to thickener with switch valve control, mother liquor and magma is separated, isolates mixed salt subsequently into centrifuge
Crystallization, the mother liquor part after centrifugation is delivered in mother liquor tank, then is delivered to two grades of forced circulation heaters through mother liquor reflux pump
Being delivered to after carrying out heat exchange in forced circulation crystallizer carries out recycling processing, and another part mother liquor after centrifugation is delivered to mother liquor
In processing system.
6. desulfurization wastewater treatment system according to claim 5, it is characterised in that the MVR steam compression system includes
Vapour compression machine, driving variable-frequency motor and frequency converter；
The vapour compression machine is connected with two-stage forced-circulation evaporator, forced circulation crystallizer, the two-stage forced circulation
The indirect steam that evaporimeter, forced circulation crystallizer are produced is entered in vapour compression machine by pipeline, the vapour compression machine pair
Indirect steam does work, and lifts vapor (steam) temperature, then steam is delivered to one-level forced circulation heater and two grades of forced circulation add
Hot device, to realize recycling for the latent heat of indirect steam.
7. desulfurization wastewater treatment system according to claim 6, it is characterised in that also include condensate water pot, the two-stage
The condensed water that forced-circulation evaporator, forced circulation crystallizer are discharged is input into condensate water pot by pipeline, will by condensate water pot
Condensed water is delivered in good antiscale property pre-heating system, carries out heat exchange to desulfurization wastewater.
8. desulfurization wastewater treatment system according to claim 4, it is characterised in that the mother liquid disposal system includes catalysis
Electrolysis unit, calandria preheater, single-action forced circulation crystallizer are thickener, centrifuge, mother liquor tank and mother liquor reflux pump, strong
Recirculation heater processed；
The a part of mother liquor that discharges through the evaporation and crystallization system is delivered to catalytic electrolysis device by pump and is electrolysed and is urging
Part COD is removed in the presence of agent, then is delivered to after calandria preheater heat exchange in single-action forced circulation crystallizer, adopt
Mother liquid evaporation is crystallized with steam mode of heating, a steam part for evaporation is recycled and enters heat pump, and another part enters to fall in lines
Mixed salt is separated by tubular preheater, crystalline solid by centrifuge, and the mother liquor after centrifugation is delivered in mother liquor tank, by mother liquor reflux
Pump is delivered to forced circulation heater, and the mother liquor after forced circulation heater heating is delivered to the crystallization of single-action forced circulation
Device carries out recycling processing.
9. desulfurization wastewater treatment system according to claim 8, it is characterised in that the single-action forced circulation crystallizer row
The steam for going out is delivered in calandria preheater and heat pump respectively, provides steam by heat pump for forced circulation heater.
10. desulfurization wastewater treatment system according to claim 5, it is characterised in that the two-stage forced-circulation evaporator,
Separation of gypsum device has been respectively communicated with the output pipe of forced circulation crystallizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193432.4A CN106477796A (en) | 2016-12-21 | 2016-12-21 | Desulfurization wastewater treatment system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193432.4A CN106477796A (en) | 2016-12-21 | 2016-12-21 | Desulfurization wastewater treatment system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106477796A true CN106477796A (en) | 2017-03-08 |
Family
ID=58285003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611193432.4A Pending CN106477796A (en) | 2016-12-21 | 2016-12-21 | Desulfurization wastewater treatment system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106477796A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107098416A (en) * | 2017-06-29 | 2017-08-29 | 合众高科（北京）环保技术股份有限公司 | A kind of Waste Water Treatment and its method of wastewater treatment with buffer unit |
| CN108275821A (en) * | 2018-03-15 | 2018-07-13 | 北京燕山翔宇环保工程技术有限公司 | A kind of desulfurization wastewater treatment system and its treatment process |
| CN108455633A (en) * | 2018-01-13 | 2018-08-28 | 安徽金禾实业股份有限公司 | A kind of the salt extraction recovery method and device of synthesis ammonia desulfurization raffinate |
| CN108558098A (en) * | 2017-12-15 | 2018-09-21 | 北京永新环保有限公司 | A kind of method for treating desulfurized wastewater and device |
| CN108793571A (en) * | 2018-06-07 | 2018-11-13 | 合肥卡若环保科技合伙企业（有限合伙） | A kind of reinforcing desalination high-salt wastewater processing system |
| CN109179538A (en) * | 2018-09-28 | 2019-01-11 | 南京龙源环保有限公司 | A kind of zero-discharge treatment system of desulfurization wastewater concentration, evaporation and crystallization one |
| CN109399746A (en) * | 2018-12-21 | 2019-03-01 | 福建龙净环保股份有限公司 | A kind of desulfurization wastewater recycling treatment system |
| CN110204127A (en) * | 2019-07-09 | 2019-09-06 | 北京能为科技股份有限公司 | A kind of outside crystal seed method inhibits the system and its orientation scaling method of calcium salt scale |
| CN110563062A (en) * | 2019-09-24 | 2019-12-13 | 深圳市瑞升华科技股份有限公司 | Anti-scaling energy-saving evaporative crystallization system and evaporative crystallization process thereof |
| CN111792772A (en) * | 2020-06-10 | 2020-10-20 | 华电电力科学研究院有限公司 | Online removal method for organic pollutants in wastewater evaporation crystal slurry |
| CN111908671A (en) * | 2020-09-03 | 2020-11-10 | 国电科学技术研究院有限公司 | Method and device for preventing scaling of desulfurization-preventing wastewater concentration system |
| CN113149058A (en) * | 2021-04-16 | 2021-07-23 | 北京中科国润环保科技有限公司 | Method for water washing dechlorination of fly ash and recycling of water washing liquid and system for realizing method |
| CN113428918A (en) * | 2021-07-06 | 2021-09-24 | 江苏博科华环保科技有限公司 | Energy-saving non-scaling anticorrosive MVR low-temperature evaporation system for high-salinity wastewater treatment and use method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3332470A (en) * | 1966-01-25 | 1967-07-25 | Chicago Bridge & Iron Co | Method for concentrating solutions |
| EP0604718A2 (en) * | 1992-12-30 | 1994-07-06 | Texas Brine Corporation | Evaporative salt plant |
| CN102320575A (en) * | 2011-08-26 | 2012-01-18 | 张小江 | The method of low-temperature evaporation Sodium Persulfate |
| CN103256856A (en) * | 2013-05-11 | 2013-08-21 | 苏州博讯仪器有限公司 | Scale cleaning method for cooler |
| CN104276708A (en) * | 2014-09-24 | 2015-01-14 | 江苏京源环保股份有限公司 | Power plant wastewater zero-discharge treatment technique |
| CN104926011A (en) * | 2015-06-24 | 2015-09-23 | 北京纬纶华业环保科技股份有限公司 | Evaporating and crystallizing zero-discharge treatment system and method for high-COD waste water |
| CN105016541A (en) * | 2015-07-29 | 2015-11-04 | 凯姆德（北京）能源环境科技有限公司 | Method for separating and recovering salts from high-salt wastewater |
| CN206318826U (en) * | 2016-12-21 | 2017-07-11 | 北京燕山翔宇环保工程技术有限公司 | Desulfurization wastewater treatment system and automatic waste water processing system |
-
2016
- 2016-12-21 CN CN201611193432.4A patent/CN106477796A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3332470A (en) * | 1966-01-25 | 1967-07-25 | Chicago Bridge & Iron Co | Method for concentrating solutions |
| EP0604718A2 (en) * | 1992-12-30 | 1994-07-06 | Texas Brine Corporation | Evaporative salt plant |
| CN102320575A (en) * | 2011-08-26 | 2012-01-18 | 张小江 | The method of low-temperature evaporation Sodium Persulfate |
| CN103256856A (en) * | 2013-05-11 | 2013-08-21 | 苏州博讯仪器有限公司 | Scale cleaning method for cooler |
| CN104276708A (en) * | 2014-09-24 | 2015-01-14 | 江苏京源环保股份有限公司 | Power plant wastewater zero-discharge treatment technique |
| CN104926011A (en) * | 2015-06-24 | 2015-09-23 | 北京纬纶华业环保科技股份有限公司 | Evaporating and crystallizing zero-discharge treatment system and method for high-COD waste water |
| CN105016541A (en) * | 2015-07-29 | 2015-11-04 | 凯姆德（北京）能源环境科技有限公司 | Method for separating and recovering salts from high-salt wastewater |
| CN206318826U (en) * | 2016-12-21 | 2017-07-11 | 北京燕山翔宇环保工程技术有限公司 | Desulfurization wastewater treatment system and automatic waste water processing system |
Non-Patent Citations (1)
| Title |
|---|
| 张少峰等, 化学工业出版社 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107098416A (en) * | 2017-06-29 | 2017-08-29 | 合众高科（北京）环保技术股份有限公司 | A kind of Waste Water Treatment and its method of wastewater treatment with buffer unit |
| CN108558098A (en) * | 2017-12-15 | 2018-09-21 | 北京永新环保有限公司 | A kind of method for treating desulfurized wastewater and device |
| CN108455633A (en) * | 2018-01-13 | 2018-08-28 | 安徽金禾实业股份有限公司 | A kind of the salt extraction recovery method and device of synthesis ammonia desulfurization raffinate |
| CN108275821A (en) * | 2018-03-15 | 2018-07-13 | 北京燕山翔宇环保工程技术有限公司 | A kind of desulfurization wastewater treatment system and its treatment process |
| CN108793571A (en) * | 2018-06-07 | 2018-11-13 | 合肥卡若环保科技合伙企业（有限合伙） | A kind of reinforcing desalination high-salt wastewater processing system |
| CN109179538B (en) * | 2018-09-28 | 2023-12-26 | 南京龙源环保有限公司 | Desulfurization waste water concentration, evaporation and crystallization integrated zero emission treatment system |
| CN109179538A (en) * | 2018-09-28 | 2019-01-11 | 南京龙源环保有限公司 | A kind of zero-discharge treatment system of desulfurization wastewater concentration, evaporation and crystallization one |
| CN109399746A (en) * | 2018-12-21 | 2019-03-01 | 福建龙净环保股份有限公司 | A kind of desulfurization wastewater recycling treatment system |
| CN110204127A (en) * | 2019-07-09 | 2019-09-06 | 北京能为科技股份有限公司 | A kind of outside crystal seed method inhibits the system and its orientation scaling method of calcium salt scale |
| CN110563062A (en) * | 2019-09-24 | 2019-12-13 | 深圳市瑞升华科技股份有限公司 | Anti-scaling energy-saving evaporative crystallization system and evaporative crystallization process thereof |
| CN111792772A (en) * | 2020-06-10 | 2020-10-20 | 华电电力科学研究院有限公司 | Online removal method for organic pollutants in wastewater evaporation crystal slurry |
| CN111908671A (en) * | 2020-09-03 | 2020-11-10 | 国电科学技术研究院有限公司 | Method and device for preventing scaling of desulfurization-preventing wastewater concentration system |
| CN111908671B (en) * | 2020-09-03 | 2023-11-14 | 国家能源集团科学技术研究院有限公司 | Method and device for preventing scaling of desulfurization wastewater concentration system |
| CN113149058A (en) * | 2021-04-16 | 2021-07-23 | 北京中科国润环保科技有限公司 | Method for water washing dechlorination of fly ash and recycling of water washing liquid and system for realizing method |
| CN113149058B (en) * | 2021-04-16 | 2023-12-26 | 北京中科国润环保科技有限公司 | Method for water washing and dechlorination of fly ash and recycling of water washing liquid and system for realizing method |
| CN113428918A (en) * | 2021-07-06 | 2021-09-24 | 江苏博科华环保科技有限公司 | Energy-saving non-scaling anticorrosive MVR low-temperature evaporation system for high-salinity wastewater treatment and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106477796A (en) | Desulfurization wastewater treatment system and method | |
| CN106007133B (en) | A kind of desulfurization wastewater concentration and evaporation, crystallization, salt separating technology | |
| CN105152435B (en) | A kind of zero-emission process for treating industrial waste water | |
| CN109292797A (en) | A kind of brine waste sub-prime recovery method | |
| CN104829026B (en) | High salt high concentration cellulose ether sewage disposal system | |
| CN108358369A (en) | A kind of brine waste is concentrated by evaporation mother liquor and divides salt treatment process method and device | |
| WO2006094437A1 (en) | A method and an multi-effect evaporation for waste water of alkylene oxides | |
| CN208008627U (en) | Brine waste zero emission system | |
| CN103253818A (en) | Seawater desalination, resource comprehensive utilization and zero discharge processing system | |
| CN105833563A (en) | Non-scaling heating assembly and evaporative crystallization device with same | |
| CN206318826U (en) | Desulfurization wastewater treatment system and automatic waste water processing system | |
| CN104341072A (en) | Energy-saving waste-water continuous evaporating crystallizing system | |
| CN209367818U (en) | A kind of brine waste sub-prime recovery system | |
| CN204185326U (en) | A kind of power plant desulfurization Wastewater zero-discharge treatment system | |
| CN205683607U (en) | A kind of steam forced circulation and the vaporizer of vacuum energy-saving | |
| CN203959976U (en) | Strong brine function of mechanical steam recompression evaporation and crystallization system | |
| CN103553256B (en) | Recycling treatment process for chlorohydric acid pickling liquid waste | |
| CN205241427U (en) | Desulfurization wastewater treatment system | |
| CN203229436U (en) | Seawater desalination, resources comprehensive utilization and zero discharge treatment system | |
| CN109534568A (en) | Integrated seawater resources utilization system | |
| CN207046880U (en) | Hydrochloric acid pickling waste liquor recovery and processing system | |
| CN211971803U (en) | Novel materialized wastewater triple-effect evaporation system | |
| CN102032835B (en) | Surface anti-scaling method for evaporator for brine | |
| CN202220087U (en) | Regeneration processing device for waste acid through evaporation method | |
| CN105152186A (en) | Technique for simple substance salt separation with co-production of sodium sulfide from high-salinity wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |