CN205676302U - A kind of based on fume afterheat evaporation desulfurization wastewater zero-discharge treatment system - Google Patents
A kind of based on fume afterheat evaporation desulfurization wastewater zero-discharge treatment system Download PDFInfo
- Publication number
- CN205676302U CN205676302U CN201521064672.5U CN201521064672U CN205676302U CN 205676302 U CN205676302 U CN 205676302U CN 201521064672 U CN201521064672 U CN 201521064672U CN 205676302 U CN205676302 U CN 205676302U
- Authority
- CN
- China
- Prior art keywords
- membrane
- evaporating column
- desulfurization wastewater
- tower
- gas
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Treating Waste Gases (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The utility model discloses a kind of based on fume afterheat evaporation desulfurization wastewater zero-discharge treatment system, concentrate abatement system, gas bypass evaporating column evaporation Zero discharging system including the Dual alkali pretreatment system being sequentially connected in series, membrane filtration desalination.Of the present utility model being characterised by, described Dual alkali pretreatment system includes regulating reservoir, first order reaction pond, solid-liquid separator, secondary response pond and the defecator being sequentially connected in series；Described membrane filtration desalination concentrates feed-tank, ultrafiltration apparatus and the reverse osmosis unit that abatement system includes being sequentially connected in series；Described gas bypass evaporating column vapo(u)rization system includes strong brine case and the evaporating column being sequentially connected with, and evaporating column smoke inlet connects air preheater front portion or the flue at rear portion, and evaporating column exhaust pass connects cleaner unit entrance；The utility model has the advantages that technique is simple, use residual heat from boiler fume to be evaporated, small investment, operating cost is low, the method achieves low cost desulfurization wastewater zero-emission, has popularization, use value widely.
Description
Technical field
This utility model relates to the high slat-containing wastewater fume afterheat evaporation zero-discharge treatment systems such as electric power, metallurgy, chemical industry, belongs to
High slat-containing wastewater processing technology field, particularly relates to a kind of based on fume afterheat evaporation desulfurization wastewater zero-discharge treatment system.
Background technology
Wet desulphurization is the desulfurization method of the most unique large-scale commercial application, is to control coal-burning power plant's dioxy
Change the technical way of sulphur emissions.Limestone-gypsum Wet Flue Gas Desulfurization Process is that current domestic and international most popular a kind of flue gas takes off
Sulfur method.
The flue gas that boiler produces enters wet desulfurization system after electric cleaner dedusting, completes washing de-in absorption tower
Sulfur, is entered air by chimney after demister removes droplet.Constantly carrying out along with flue gas washing in absorption tower, absorbent is effective
Composition constantly consumes, and the calcium sulfite of generation is through forcing oxidation generation Gypsum Fibrosum, the chlorination in flue gas when flue gas is washed on absorption tower
Thing is also washed dissolving and the chloride ion brought into of sulfur removal technology water and produces chloride ion and be enriched with in absorbing liquid.Chloride ion is dense
The increasing and bring two adverse influences of degree: one is reduction of the pH value of absorbing liquid, thus cause desulfuration efficiency decline and
CaSO4The increase of fouling tendency, Gypsum Fibrosum is difficult to be dehydrated；Two is desulfurizer to be produced serious etching problem.In order to maintain
The ionic equilibrium of desulfurizer loop slurry system, prevents soluble fraction i.e. chlorine ion concentration in flue gas from exceeding setting and guarantee
Quality of desulphurization gypsum, desulphurization system needs the desulfurization wastewater that periodic exhaustion is certain, to maintain the concentration of chloride ion in the serosity of absorption tower
Control at (20000mg/l) below.The water quality characteristics of desulfurization wastewater: the desulfurization wastewater water yield is less；1. acid, general pH value is 4
～6；2. turbidity of wastewater is high, suspension content big (gypsum particle, SiO2, the hydroxide of Al and Fe), concentration is up to several ten thousand
ppm.Most particulate matter viscosity is low: 3. contain plurality of heavy metal, such as Cr, As, Cd, Pb, Hg, Cu etc.；4. salinity pole
Height, containing substantial amounts of Cl in waste water-、F-, SO3 2-、SO4 2-、Ca2+、Mg2+.Wherein chloride ion Cl-At concentrations up to～20000mg/
l.So desulfurization wastewater has the strongest corrosivity to desulphurization system pipeline, various metal material and associated power equipment, cause taking off
The process of sulfur high salinity waste water and recycle extremely difficult.
The most conventional desulfurization wastewater processing mode mainly has:
Chemical flocculation processes: most domestic power plant wet desulphurization waste water employing at present neutralizes, flocculates, reacts, precipitates, divides
From etc. method desulfurization wastewater is carried out pretreatment, mud carries out filter pressing outward transport, the general qualified discharge of desulfurization wastewater after process or
The simple reuses such as dry ash humidification, ash field spray.The program is in terms of current operational effect, and complex treatment process, medicine system is huge
Greatly, it is substantially all and does not reaches discharge standard.By above processing system, the suspension in desulfurization wastewater can be effectively reduced
Thing, heavy metal, Oil repellent, but in the waste water processed, Ca2+、Mg2+、SO4 2-、Cl-Equal size is the highest, giving up after process
Water electrode high salinity and high Cl-concentration, extremely strong to the corrosivity of metal and equipment, cause process after desulfurization wastewater cannot
It is back to other system.It it is one of waste water process for most domestic power plant desulfurization Sewage advanced treatment technology and reuse
The technology that difficult point problem, always electric power enterprise are unable to reach.
Evaporative crystallization: individual power plants is attempted desulfurization wastewater and used two grades of pretreating process, greatly reduces in waste water and suspends
The content of thing, the water outlet of pretreatment system enters back into advanced treatment system: include evaporation+crystallization processes, by evaporation, crystallization and
Drying device can make desulfurization wastewater be separated into water (steam) and the solid waste of high-quality, and desulfurization wastewater thoroughly achieves harmless
Change.Such as Heyuan system for treating wastewater from power plant has started the beginning of China's desulfurization wastewater treatment technology, is domestic first hand
Use the power plant of desulfurization wastewater " pretreatment+evaporation+crystallization " technique, desulfurization wastewater treating capacity about 20t/h, invest about～98,000,000
Unit, but there is the drawback that cost of investment and operating cost, energy consumption are higher in the method, and this technology fails to be widely popularized.
Utility model content
For drawbacks described above or deficiency, the purpose of this utility model is that providing a kind of gives up based on fume afterheat evaporation desulfurization
Water zero discharge processing system, this system achieves low cost desulfurization wastewater zero-emission.
For reaching object above, this utility model is achieved through the following technical solutions:
It is made up of three below system based on fume afterheat evaporation wet desulphurization Wastewater zero-discharge treatment system: include successively
The Dual alkali pretreatment system, the membrane filtration desalination that connect concentrate abatement system, gas bypass evaporating column evaporation Zero discharging system.
Comprise the following steps:
1) regulating reservoir that, Dual alkali pretreatment system includes being sequentially connected in series, first order reaction pond, solid-liquid separator, two grades anti-
Answer pond and defecator；The sludge outlet of described solid-liquid separator carries out Treatment of Sludge, and the sludge outlet of defecator connects absorption tower；
2), membrane filtration desalination concentrates feed-tank, ultrafiltration apparatus and the reverse osmosis unit that abatement system includes being sequentially connected in series；
3), gas bypass evaporating column evaporation Zero discharging system includes strong brine case and evaporating column, the evaporating column being sequentially connected with
Smoke inlet connects air preheater front portion or the flue at rear portion, and evaporating column exhaust pass connects cleaner unit entrance；
4), evaporation after water vapour enter boiler smoke with gaseous state, utilize power-plant flue gas system dust removing device device will evaporation
Tower crystal and flue gas carry out gas solid separation, and highly purified vaporous water steam and crystal are separated.
5), removing the steam after crystal and enter in desulfuration absorbing tower with flue gas and all recycle, crystal is with powder
Coal ash is together discharged.
Further, one evaporates desulfurization wastewater zero-discharge treatment system based on fume afterheat, including: by pipeline successively
Connect regulating reservoir, first order reaction pond, solid-liquid separator, secondary response pond, defecator, ultrafiltration/reverse osmosis feedwater case, ultrafiltration/
Reverse osmosis unit, strong brine baffle-box, evaporating column；Solid-liquid separator mud carries out Treatment of Sludge, and in defecator, sludge reflux is extremely
Desulphurization system；Evaporating column gas approach connects air preheater front portion or the flue at rear portion, and evaporating column exhaust pass accesses cleaner unit and enters
Mouthful, house outlet accesses desulfuration absorbing tower entrance.
Described step 1) Dual alkali pretreatment system employing secondary softening method, including the regulation being sequentially connected with by pipeline
Pond, first order reaction pond, solid-liquid separator, secondary response pond, defecator.
Further, first order reaction pond, secondary response pond are also equipped with medicine system, and medicine system is provided with grug feeding jar and dosing
Pump, grug feeding jar outlet connects dosing pump and reaction tank.
Further, the material that Dual alkali pretreatment system is added is Ca (OH)2, NaOH, inorganic porous flocculant,
PAC、PAM、Na2CO3, one or more in HCl.
Described step 2), it is sequentially connected in series ultrafiltration between described ultrafiltration apparatus and reverse osmosis unit and produces water tank, ultrafiltration product water
Pump, cartridge filter and reverse osmosis high-pressure pump.
Further, filter membrane is the one in micro-filtration membrane, ultrafilter membrane, NF membrane, and described micro-filtration membrane is organic membrane, metal
One in film or ceramic membrane, its aperture is between 1～10 μm；Described ultrafiltration be immersion ultrafiltration, pillar ultrafiltration, tubular type surpass
One in filter, roll-to-roll ultrafiltration or plate-type hyperfiltration；It is the NF membrane of at least 98% that described NF membrane uses calcium sulfate rejection.
Further, high salt film group is reverse osmosis, high pressure reverse osmosis, just permeate, electrodialysis, one in Membrane Materials, instead
Reverse osmosis membrane module in osmosis desalination unit is rolling membrane module, and membrane material is acetate fiber or composite membrane in organic membrane.
Further, ultrafilter membrane group connects has ultrafilter membrane to clean device, and reverse osmosis membrane group connects has reverse osmosis membrane to clean dress
Put, periodically ultrafilter membrane and reverse osmosis membrane assembly can be carried out timing automatic on-line cleaning and Chemical cleaning respectively, reduce fouling membrane
Blocking, prolonging service lifetime of film.
Described step 3) independent gas bypass evaporating column is set between boiler air preheater and cleaner unit, evaporating column extracts
Air preheater front portion or a part of high-temperature flue gas at rear portion, utilize high-temperature flue gas that a small amount of concentrated solution is evaporated in evaporating column knot
Brilliant；In evaporating column drop and the high-temperature flue gas of atomization carry out rapidly conducting heat, mass transfer, evaporation, water is with the water (steam) of high-quality
Gaseous state enters desulphurization absorption tower system with flue gas, and the system of being desulfurized is recycled.Specially utilize residual heat from boiler fume to useless
Water is evaporated crystallization, it is not necessary to other thermal source of power plant, belongs to UTILIZATION OF VESIDUAL HEAT IN.
Further, described evaporating column uses independent gas bypass evaporating column, and it is anterior that evaporating column thermal source takes from air preheater
Or a part of high-temperature flue gas at rear portion, form bypass with air preheater and low-level (stack-gas) economizer, utilize flue gas system air preheater and low temperature
The resistance balance of economizer, bypass evaporating column is not required to provide other power.
Further, described evaporating column configures, and according to the water yield after concentration decrement, every boiler arranges one or two steaming
Sending out tower, full factory can set one or many evaporating columns, and the waste water after concentrating decrement evaporates completely, it is achieved wastewater zero discharge.
Further, evaporating column uses circular void tower, completely without rotatable parts and support rod member, heat smoke in tower
Entered by bottom evaporating column, top discharge；Mixing condition excellent in tower, makes the moisture in tower evaporate rapidly.
Further, setting atomizer in evaporating column, spray in evaporating column by drop atomization, every tower uses one or many
Individual atomizer, atomizer uses air atomizer spray nozzle.Spray into the water atomization in tower effective, in making tower after transient evaporation
The solids of fierce turbulence is difficult to bonding and unites, it is ensured that the reliable and stable operation of rear class cleaner unit；Accurately setting of atomizer
Put and will not produce wet ash bonding, viscous wall and blocking in making evaporating column, fall ash.
Further, described evaporating column entrance, exit are provided with flue-gas temperature, pressure and flow measurement device.By
In exhaust gas temperature higher than dew point temperature 15～20 DEG C, corrosion also will not be produced.
Described step 4) evaporation after crystal separate, use power-plant flue gas system dust removing device device, by evaporating column crystallize
Thing and flue gas carry out gas solid separation, and highly purified vaporous water steam and crystal are separated.Flue after evaporating column connects
Cleaner unit entrance, evaporating column is without separately arranging gas-solid separating device.
Further, evaporative crystallization thing is together flutterred collection, is discharged by cleaner unit with flyash, removes the steam after crystal
Enter in desulfuration absorbing tower with flue gas and all recycle.
Further, the one during cleaner unit is electrostatic precipitator or sack cleaner.
Compared with the prior art, the beneficial effects of the utility model are:
1. this utility model concise in technology, it is achieved that low cost desulfurization wastewater zero-emission, small investment, operating cost is low, real
Strong by property, the method has popularization, use value widely.
2. this utility model can remove the float in desulfurization wastewater, heavy metal etc., and can be gone by evaporating column
Except conventional waste water processes the SO that cannot remove4 2-、Cl-Etc. dissolubility salt；
3. use residual heat from boiler fume to be evaporated, effectively make use of power plant boiler fume afterheat, reach resource, remaining
The purpose of pick up the heat.Without other steam source, save the energy.
4. desulfurization wastewater minimizing design, uses membrane filtration desalination to concentrate, the demineralized water of recyclable 60%～90%, residue
A small amount of condensed water utilize evaporating column to be evaporated, be back to desulphurization system, it is achieved that power plant desulfurization waste water is truly
100% recycles completely.
5. bypass flue evaporating column technique, evaporating column and air preheater, low-level (stack-gas) economizer paired running, to other system of power plant
Without impact, operation maintenance is simple, practical.
Accompanying drawing explanation
In conjunction with describing and be better understood with reference to the drawings characteristic of the present utility model in detail, composition and advantage,
In accompanying drawing: dotted line is typical boiler smoke system flow with lower part.
Fig. 1 is this utility model process flow diagram.
Detailed description of the invention
Approximation term in description and claims is used for modifying quantity, represents that this utility model is not limited to this concrete
Quantity, also includes the part of the acceptable correction close with this quantity, without causing the change of relevant basic function.
Method in this utility model embodiment can be used for the difference such as desulfurization wastewater zero-emission or electric power, metallurgy, chemical industry
The high slat-containing wastewater zero-emission of industrial process.
In conjunction with describing in detail and characteristic of the present utility model, composition and advantage can be better understood from referring to the drawings, under
Face combines accompanying drawing and is described in detail this utility model.
This utility model provides a kind of based on fume afterheat evaporation desulfurization wastewater zero-discharge treatment system, by three below
System forms: include that the Dual alkali pretreatment system being sequentially connected with, membrane filtration desalination concentrate abatement system, gas bypass evaporating column
Evaporation Zero discharging system.Pretreatment system can be to float, heavy metal, Ca in desulfurization wastewater2+、Mg2+、SO4 2-、F-Etc. going
Remove, waste water is softened, reduces hardness of water, prevent from causing the calcification of membrance separation desalting system film and dirt to block up, extend film
Service life；Membrane filtration desalination is used to concentrate decrement, recyclable major part water purification；Remaining containing soluble solid, high salinity,
High Cl-A small amount of condensed water of ion concentration, utilizes residual heat from boiler fume to be evaporated in gas bypass evaporating column, in waste water
Soluble solid has carried out separating treatment with crystalline salt form, can realize desulfurization wastewater and recycle completely.
As it is shown in figure 1, be that this utility model is a kind of evaporate zero emission treatment of desulfured waste water principle based on fume afterheat
And process schematic representation, the present embodiment includes: the regulating reservoir that is sequentially connected with by pipeline, first order reaction pond, solid-liquid separator, two
Order reaction pond, defecator, ultrafiltration/reverse osmosis feedwater case, ultrafiltration/reverse osmosis unit, strong brine baffle-box, evaporating column；Solid-liquid divides
Carrying out Treatment of Sludge from device mud, in defecator, sludge reflux is to desulphurization system；Before evaporating column flue connect air preheater anterior or
The flue at rear portion, takes from air preheater front portion or a part of high-temperature flue gas at rear portion, and evaporating column rear pass accesses cleaner unit entrance.Super
Desalination water after filter, reverse osmosis concentrated compression apparatus desalination is back to industrial water system, and the condensed water concentrating minimizing enters evaporating column
Evaporative crystallization, evaporating column thermal source is taken from air preheater front portion or a part of high-temperature flue gas at rear portion, is utilized power-plant flue gas system dust removing
Crystal is separated by device, and house outlet accesses desulfuration absorbing tower entrance.
Dual alkali pretreatment system uses two-stage coagulation precipitation pretreating process, including the regulation being sequentially connected with by pipeline
Pond, first order reaction pond, solid-liquid separator, secondary response pond, defecator.
First, the desulfurization wastewater that power plant comes enters regulating reservoir, and owing to desulfurization waste water quality fluctuation range is relatively big, the water yield is unstable
Fixed, waste water is all measured quenched by regulating reservoir, it is simple to the stable operation of processing system；Air is blasted at COD concentration relatively Gao Shike,
Reduce the COD content in waste water.
Lime slurry, evenly into first order reaction pond, is added first order reaction pond by the waste water of regulating reservoir, adjusts pH in pond
Value, between 9～9.5, is simultaneously introduced inorganic porous flocculant, most suspended substances, heavy metal, Mg2+、SO4 2-、F-Deng with Calx
Carry out reaction generation precipitation to be removed.
Solid-liquid separator uses high-efficient filter cloth solid-liquid separator, effectively solves mud difficulty sedimentation problem；In one-level
In reaction tank sludge box add 5% novel inorganic porous flocculant, the complex comprised in solution after flocculation, precipitate, with
And the bulky grain thing that the tiny alumen ustum of SS is accumulated into is transported to solid-liquid separator, carry out solid-liquid separation.Inorganic owing to the addition of
Porous flocculant, solid-liquid separator forms the mud cake of consolidation, and its solid content is up to 70%～80%, much larger than conventional 40～
50%, keep mud form stable.
Two-stage coagulation precipitates: the clear water that one-level solid-liquid separator is separated enters secondary response pond, in secondary response pond
In carry out pH value readjustment, be simultaneously introduced Na2CO3, by the Ca in waste water2+, with CaCO3The mode of precipitation is removed.
The water outlet of secondary response pond enters defecator, utilizes gravity to carry out precipitate and separate.With CaCO in precipitating sludge3It is precipitated as
Main, CaCO3For the absorbent of wet desulfurization system, precipitate is reflowable to be recycled to desulphurization system, and defecator supernatant enters
Enter ultrafiltration/reverse osmosis feedwater case.Now waste water is alkalescence, and in ultrafiltration/reverse osmosis feedwater case, pH value pulls back to 6～7, meets film
Filtering water requirement.
The medicament used in the present embodiment has Ca (OH)2, NaOH, inorganic porous flocculant, PAC, PAM, Na2CO3, in HCl
One or more.
Waste water through Dual alkali pretreatment enters membrane filtration desalination and concentrates abatement system.The present embodiment uses ultrafiltration, anti-
The primary water that pretreatment is softened by infiltration bi-membrane method carries out desalination concentration；Ultrafilter membrane group can be further by graininess impurity in waste water
Remove, can effectively remove the solid particle impurity in water, reduce desalination module load, the service life of prolongation reverse osmosis membrane.Instead
Infiltration high salt film group desalination rate is up to more than 98%, and the desalination water after desalination is back to industrial water system, and high salt film group filters
A small amount of concentrated solution is evaporated crystallization, it is achieved the minimizing of waste water evaporation.
In the present embodiment, filter membrane is ultrafilter membrane, and described ultrafilter membrane is the one in organic membrane, metal film or ceramic membrane, its
Aperture is between 1～10 μm；Described ultrafiltration is immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, roll-to-roll ultrafiltration or plate-type hyperfiltration
In one.
High salt film group is reverse osmosis, high pressure reverse osmosis, just permeate, electrodialysis, one in Membrane Materials, reverse osmosis deaslination fills
Reverse osmosis membrane module in putting is rolling membrane module, and membrane material is acetate fiber or composite membrane in organic membrane.
Ultrafilter membrane group connects has ultrafilter membrane to clean device, and reverse osmosis membrane group connects washing unit with reverse osmosis membrane, can distinguish
Timing periodically carries out automatic on-line cleaning and Chemical cleaning to ultrafilter membrane and reverse osmosis membrane assembly, reduces fouling membrane blocking, extends
Film service life.
Concentrate through membrane filtration desalination, the demineralized water of recyclable 60%～90%, remain the shrink of a small amount of high-salt concentrated and send into
Gas bypass evaporating column is evaporated.
Independent gas bypass evaporating column is set between boiler air preheater and cleaner unit, before evaporating column extraction air preheater
Portion or a part of high-temperature flue gas at rear portion, utilize high-temperature flue gas that a small amount of concentrated solution is evaporated in evaporating column crystallization；Steaming
Send out the drop of atomization and high-temperature flue gas in tower carry out rapidly conducting heat, mass transfer, evaporation, water with water (steam) gaseous state of high-quality with cigarette
Gas enters desulphurization absorption tower system, and the system of being desulfurized is recycled.Specially utilize residual heat from boiler fume that waste water is steamed
Send out crystallization, it is not necessary to other thermal source of power plant, belong to UTILIZATION OF VESIDUAL HEAT IN.
Evaporating column uses independent gas bypass evaporating column, and evaporating column thermal source takes from air preheater front portion or the part at rear portion
High-temperature flue gas, forms bypass with air preheater and low-level (stack-gas) economizer, utilizes the resistance of flue gas system air preheater and low-level (stack-gas) economizer to put down
Weighing apparatus, bypass evaporating column is not required to provide other power.
Use residual heat from boiler fume be evaporated crystallization, due to before boiler smoke exhaust gas temperature air preheater at 300～350 DEG C
Left and right, at about 130～150 DEG C after air preheater, flue gas has huge thermal capacity, evaporating column extraction air preheater front portion or rear portion
A part of high-temperature flue gas, the atomization water droplet of evaporating column and high-temperature flue gas carry out rapidly conducting heat, mass transfer, evaporation, water is with high-purity
Water (steam) gaseous state of degree enters desulfuration absorbing tower with flue gas, and in desulfuration absorbing tower, condensation utilizes.Therefore, may replace absorption tower
Identical evaporated water, it is achieved the purpose that desulfurization wastewater recycles completely.
Evaporating column configures, and according to the water yield after concentration decrement, every boiler arranges one or two evaporating columns, and full factory can set
One or many evaporating columns, concentrate the waste water after decrement and evaporate completely, it is achieved wastewater zero discharge.
Evaporating column uses circular void tower, does not set any rotatable parts and support rod member in tower, heat smoke by evaporating column bottom
Enter, top discharge；Mixing condition excellent in tower, makes the moisture in tower evaporate rapidly.
Setting atomizer in evaporating column, spray in evaporating column by drop atomization, every tower uses one or more atomization spray
Mouth, atomizer uses air atomizer spray nozzle.Spray into the water atomization in tower effective, fierce turbulence in making tower after transient evaporation
Solids be difficult to bonding and unite, it is ensured that the reliable and stable operation of rear class cleaner unit；Accurately arranging of atomizer makes evaporation
Wet ash bonding, viscous wall and blocking will not be produced in tower.
Described evaporating column entrance, exit are provided with flue-gas temperature, pressure and flow measurement device.Due to exhaust gas temperature
Higher than dew point temperature 15～20 DEG C, corrosion also will not be produced.
The present embodiment evaporating column flow velocity is 3.5～5m/s, and the time of staying is 5～8s；Evaporating column should calculate in detail flow velocity with
Evaporation distance, injection flow rate and exhaust gas volumn, flue-gas temperature relation；The selection of spray gun and layout；Nozzle atomization particle diameter optimizes；Atomization is steamed
Send out distance；Spraying range of scatter；Spraying flue-gas temperature reduces characteristic, spraying flue section temperature distribution；Injection flow rate and flue gas temperature
Degree fall (evaporate completely, mix) relation, spray powder coal ash caking controls；Spraying dust stratification controls；Flyash to the abrasion of shower nozzle with
Blocking；Spraying is to evaporating column and the infection of flue.
Crystal after evaporation separates, and uses the original dust catcher device of power-plant flue gas system, by evaporating column crystal and cigarette
Gas carries out gas solid separation, and highly purified vaporous water steam and crystal are separated.Flue gas after evaporation connects cleaner unit and enters
Mouthful, evaporating column is without separately arranging gas-solid separating device.Evaporative crystallization thing is together flutterred collection, is discharged by cleaner unit with flyash, removes
Steam after crystal enters in desulfuration absorbing tower with flue gas and all recycles.
Gas-solid separating device uses electrostatic precipitator system, mainly by housing, positive plate, cathode line, collection bucket, high-tension electricity
Sources etc. form, and cleaner unit efficiency of dust collection is up to more than 99.8%.Water (steam) enters desulfurization with flue gas by gas-solid separating device
Absorption tower system.Soluble solid, SO in waste water4 2-、Cl-、Na+After the solidification of contour saliferous substance crystallization, it is caught in cleaner unit
Collection, together discharges with flyash.
Cleaner unit is the one in electrostatic precipitator or sack cleaner.
It should be noted that a whole set of fume afterheat evaporation zero emission treatment of desulfured waste water control system is by computer,
Programmable controller PLC and actuator and instrumentation thereof form.Can be according to the load variations of waste water, boiler smoke during use
Temperature and set different parameters, make up to optimal running effect.Instrumentation includes into water pH value, pressure, feed water flow
Gauge；Delivery turbidity meter, water outlet salinometer, flue-gas temperature, pressure, flue gas flow are measured, evaporating column temperature, Stress control.
This utility model is the high saliferous desulfurization wastewater recovery process of a kind of uniqueness newly developed, and this method utilizes cleverly
Power plant boiler fume afterheat and desulphurization system water yield evaporation balance theory, in the most optimal way to float, dissolubility
Solid, heavy metal, high saliferous, Ca2+、Mg2+、Cl-、F-The materials such as ion have carried out separating treatment respectively according to substance characteristics.High
The water (steam) of quality can recycle completely, and high salinity and solid waste are separated and collected.To power plant, other is package unit
System, without impact, is invested little, and operating cost is low, practical, has popularization, use value widely.
The application of power plant desulfurization Sewage advanced treatment recovery and utilization technology, for the thermal power plant of all wet flue gas desulfurization techniques
Provide the desulfurization wastewater high efficiency, low cost desalting processing technology realizing high saliferous, high chloride ion, it is achieved that power plant desulfurization waste water
Recycling completely truly, has accomplished wastewater zero discharge.
Described above, only utilize the embodiment of this origination techniques content, any those skilled in the art to use this wound
Make modification, the change done, all belong to the scope of the claims that this creation is advocated, and be not limited to those disclosed embodiments.
Claims (10)
1. evaporate a desulfurization wastewater zero-discharge treatment system based on fume afterheat, including the Dual alkali pretreatment system being sequentially connected with
System, membrane filtration desalination concentrate abatement system, gas bypass evaporating column evaporation Zero discharging system, it is characterised in that:
Regulating reservoir that described Dual alkali pretreatment system includes being sequentially connected in series, first order reaction pond, solid-liquid separator, secondary response pond
And defecator；The sludge outlet of described solid-liquid separator carries out Treatment of Sludge, and the sludge outlet of defecator connects absorption tower；
Described membrane filtration desalination concentrates feed-tank, ultrafiltration apparatus and the reverse osmosis unit that abatement system includes being sequentially connected in series；
Described gas bypass evaporating column evaporation Zero discharging system includes strong brine case and the evaporating column being sequentially connected with, evaporating column flue gas
Entrance connects air preheater front portion or the flue at rear portion, and evaporating column exhaust pass connects cleaner unit entrance；
Gas solid separation module, including cleaner unit and desulfuration absorbing tower, utilizes power-plant flue gas system dust removing device device to be tied by evaporating column
Brilliant thing carries out gas solid separation with flue gas.
One the most according to claim 1 evaporates desulfurization wastewater zero-discharge treatment system based on fume afterheat, and its feature exists
In, including: the regulating reservoir that is sequentially connected with by pipeline, first order reaction pond, solid-liquid separator, secondary response pond, defecator, super
Filter/reverse osmosis feedwater case, ultrafiltration/reverse osmosis unit, strong brine baffle-box, evaporating column；Solid-liquid separator mud is carried out at mud
Reason, in defecator, sludge reflux is to desulphurization system；Evaporating column gas approach connects air preheater front portion or the flue at rear portion, takes from sky
Pre-device front portion or a part of high-temperature flue gas at rear portion, evaporating column exhaust pass accesses cleaner unit entrance, and house outlet accesses de-
Sulfur absorption tower entrance.
Fume afterheat the most according to claim 1 evaporation desulfurization wastewater zero-discharge treatment system, it is characterised in that described
Dual alkali pretreatment system uses secondary softening method, and its first order reaction pond, secondary response pond are also equipped with medicine system, medicine system
Being provided with grug feeding jar and dosing pump, grug feeding jar outlet connects dosing pump and reaction tank.
Fume afterheat the most according to claim 1 evaporation desulfurization wastewater zero-discharge treatment system, it is characterised in that described double
The material that alkaline process pretreatment system is added is Ca (OH)2, NaOH, inorganic porous flocculant, PAC, PAM, Na2CO3, in HCl
One or more.
Fume afterheat the most according to claim 1 evaporation desulfurization wastewater zero-discharge treatment system, it is characterised in that described mistake
Filter membrane is the one in micro-filtration membrane, ultrafilter membrane, NF membrane, and described micro-filtration membrane is the one in organic membrane, metal film or ceramic membrane,
Its aperture is between 1～10 μm；Described ultrafiltration is immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, roll-to-roll ultrafiltration or board-like super
One in filter；It is the NF membrane of at least 98% that described NF membrane uses calcium sulfate rejection.
Fume afterheat the most according to claim 1 evaporation desulfurization wastewater zero-discharge treatment system, it is characterised in that described instead
Permeable membrane group is reverse osmosis, high pressure reverse osmosis, just permeate, electrodialysis, one in Membrane Materials, anti-in Reverse Osmosis Desalination Process Equipment
Infiltration membrane module is rolling membrane module, and membrane material is acetate fiber or composite membrane in organic membrane.
Fume afterheat the most according to claim 1 evaporation desulfurization wastewater zero-discharge treatment system, it is characterised in that described steaming
Sending out tower and use independent gas bypass evaporating column, evaporating column thermal source takes from air preheater front portion or a part of high-temperature flue gas at rear portion,
Form bypass with air preheater and low-level (stack-gas) economizer, utilize the resistance balance of flue gas system air preheater and low-level (stack-gas) economizer, bypass to steam
Send out tower to be not required to provide other power.
Fume afterheat the most according to claim 1 evaporation desulfurization wastewater zero-discharge treatment system, it is characterised in that described steaming
Sending out tower and use circular void tower, do not have any rotatable parts and support rod member in tower, heat smoke is entered by bottom evaporating column, by top
Discharge makes the moisture in tower evaporate the most completely.
Fume afterheat the most according to claim 1 evaporation desulfurization wastewater zero-discharge treatment system, it is characterised in that described steaming
Fa Tanei sets atomizer, sprays in evaporating column by drop atomization, and each tower uses one or more atomizers, atomizer
Use air atomizer spray nozzle.
Fume afterheat the most according to claim 1 evaporation desulfurization wastewater zero-discharge treatment system, it is characterised in that described
Gas solid separation module, including cleaner unit and desulfuration absorbing tower, cleaner unit is the one in electrostatic precipitator or sack cleaner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064672.5U CN205676302U (en) | 2015-12-18 | 2015-12-18 | A kind of based on fume afterheat evaporation desulfurization wastewater zero-discharge treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064672.5U CN205676302U (en) | 2015-12-18 | 2015-12-18 | A kind of based on fume afterheat evaporation desulfurization wastewater zero-discharge treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205676302U true CN205676302U (en) | 2016-11-09 |
Family
ID=57437763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521064672.5U Expired - Fee Related CN205676302U (en) | 2015-12-18 | 2015-12-18 | A kind of based on fume afterheat evaporation desulfurization wastewater zero-discharge treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205676302U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107129094A (en) * | 2017-06-08 | 2017-09-05 | 上海电力学院 | The Zero discharging system of desulfurization wastewater is evaporated based on multi-heat source |
| CN107857321A (en) * | 2017-11-07 | 2018-03-30 | 西安协力动力科技有限公司 | A kind of technique for Waste Water From Fire Power Plant zero discharge treatment |
| CN108002500A (en) * | 2017-12-20 | 2018-05-08 | 中国华电集团科学技术研究总院有限公司 | Cyclone-flocculation device and the high turbid wastewater processing system of coal-burning power plant's high salt and application |
| CN109019734A (en) * | 2018-08-28 | 2018-12-18 | 盛发环保科技（厦门）有限公司 | A kind of system of desulfurization wastewater zero-emission |
| CN109133465A (en) * | 2017-06-28 | 2019-01-04 | 北京朗新明环保科技有限公司 | A kind of Waste Heat Reuse vacuum membrane distillation zero discharge treatment device and method |
| CN109626691A (en) * | 2018-12-28 | 2019-04-16 | 大唐环境产业集团股份有限公司 | A kind of flexibly adjustable thermal power plant's high-salinity wastewater zero-emission system and method |
| CN109650636A (en) * | 2018-12-26 | 2019-04-19 | 国电新能源技术研究院有限公司 | A kind of brine waste processing system |
| CN110342714A (en) * | 2019-07-04 | 2019-10-18 | 华电电力科学研究院有限公司 | A kind of coal-burning power plant's process without drainage of waste water system and method based on semi-dry desulphurization technology |
| CN112429901A (en) * | 2020-11-18 | 2021-03-02 | 成都市蜀科科技有限责任公司 | Desulfurization waste water zero discharge system of low temperature flue gas concentration decrement and evaporation of double fluid bypass flue |
| CN112960860A (en) * | 2021-02-23 | 2021-06-15 | 无锡江丰资源再生有限公司 | Treatment process for flue gas desulfurization wastewater by resource utilization of copper-containing waste |
| CN114477595A (en) * | 2022-02-23 | 2022-05-13 | 杰瑞环境工程技术有限公司 | Wastewater treatment system |
| CN114735869A (en) * | 2021-12-27 | 2022-07-12 | 国能铜陵发电有限公司 | Method for removing ions from desulfurized slurry and solidifying high-temperature flue gas bypass of concentrated solution |
-
2015
- 2015-12-18 CN CN201521064672.5U patent/CN205676302U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107129094A (en) * | 2017-06-08 | 2017-09-05 | 上海电力学院 | The Zero discharging system of desulfurization wastewater is evaporated based on multi-heat source |
| CN107129094B (en) * | 2017-06-08 | 2020-07-17 | 上海电力学院 | Zero discharge system based on multi-heat-source evaporation desulfurization waste water |
| CN109133465A (en) * | 2017-06-28 | 2019-01-04 | 北京朗新明环保科技有限公司 | A kind of Waste Heat Reuse vacuum membrane distillation zero discharge treatment device and method |
| CN107857321A (en) * | 2017-11-07 | 2018-03-30 | 西安协力动力科技有限公司 | A kind of technique for Waste Water From Fire Power Plant zero discharge treatment |
| CN107857321B (en) * | 2017-11-07 | 2021-01-08 | 西安协力动力科技有限公司 | Process for zero discharge treatment of wastewater of thermal power plant |
| CN108002500B (en) * | 2017-12-20 | 2020-07-14 | 中国华电集团科学技术研究总院有限公司 | Rotational flow flocculation device, high-salinity high-turbidity wastewater treatment system of coal-fired power plant and application |
| CN108002500A (en) * | 2017-12-20 | 2018-05-08 | 中国华电集团科学技术研究总院有限公司 | Cyclone-flocculation device and the high turbid wastewater processing system of coal-burning power plant's high salt and application |
| CN109019734A (en) * | 2018-08-28 | 2018-12-18 | 盛发环保科技（厦门）有限公司 | A kind of system of desulfurization wastewater zero-emission |
| CN109019734B (en) * | 2018-08-28 | 2021-07-13 | 盛发环保科技（厦门）有限公司 | Desulfurization waste water zero release's system |
| CN109650636A (en) * | 2018-12-26 | 2019-04-19 | 国电新能源技术研究院有限公司 | A kind of brine waste processing system |
| CN109626691A (en) * | 2018-12-28 | 2019-04-16 | 大唐环境产业集团股份有限公司 | A kind of flexibly adjustable thermal power plant's high-salinity wastewater zero-emission system and method |
| CN109626691B (en) * | 2018-12-28 | 2023-04-18 | 大唐环境产业集团股份有限公司 | Flexible and adjustable zero discharge system and method for high-salinity wastewater of thermal power plant |
| CN110342714A (en) * | 2019-07-04 | 2019-10-18 | 华电电力科学研究院有限公司 | A kind of coal-burning power plant's process without drainage of waste water system and method based on semi-dry desulphurization technology |
| CN112429901A (en) * | 2020-11-18 | 2021-03-02 | 成都市蜀科科技有限责任公司 | Desulfurization waste water zero discharge system of low temperature flue gas concentration decrement and evaporation of double fluid bypass flue |
| CN112960860A (en) * | 2021-02-23 | 2021-06-15 | 无锡江丰资源再生有限公司 | Treatment process for flue gas desulfurization wastewater by resource utilization of copper-containing waste |
| CN112960860B (en) * | 2021-02-23 | 2022-04-26 | 无锡江丰资源再生有限公司 | Treatment process for flue gas desulfurization wastewater by resource utilization of copper-containing waste |
| CN114735869A (en) * | 2021-12-27 | 2022-07-12 | 国能铜陵发电有限公司 | Method for removing ions from desulfurized slurry and solidifying high-temperature flue gas bypass of concentrated solution |
| CN114477595A (en) * | 2022-02-23 | 2022-05-13 | 杰瑞环境工程技术有限公司 | Wastewater treatment system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205676302U (en) | A kind of based on fume afterheat evaporation desulfurization wastewater zero-discharge treatment system | |
| CN105481157A (en) | Method for zero emission treatment of desulfurization waste water based on flue gas waste heat evaporation | |
| CN105948364B (en) | A kind of desulfurization wastewater zero-discharge treatment system based on bypass flue evaporation | |
| CN205473143U (en) | High salinity wastewater treatment system | |
| CN101891330B (en) | Power plant wastewater treatment system and method | |
| CN107129094A (en) | The Zero discharging system of desulfurization wastewater is evaporated based on multi-heat source | |
| CN106365371A (en) | Desulfurization waste water zero discharge processing system and processing method | |
| CN109647164B (en) | Zero-emission wastewater desulfurization process and device | |
| CN108006683A (en) | A kind of method and apparatus that desulfurization wastewater zero-emission is realized using full flue gas | |
| CN104129824B (en) | Heat-engine plant desulfurized wastewater comprehensive treatment and dust granules thing discharge-reducing method | |
| CN107082523A (en) | A kind of wet desulphurization waste water reclaiming processing system and its processing method | |
| CN201762204U (en) | Wastewater treatment system of power plant | |
| CN205953746U (en) | Zero discharge system of coal fired power plant waste water | |
| CN107857321B (en) | Process for zero discharge treatment of wastewater of thermal power plant | |
| CN105948367A (en) | Novel desulfurization waste water zero discharging process and system | |
| CN110723858A (en) | Desulfurization wastewater zero-discharge treatment system and treatment process | |
| CN104926008A (en) | Wet desulfurization wastewater zero emission process and device thereof | |
| CN205856232U (en) | A kind of desulfurization wastewater zero-discharge treatment system based on bypass flue evaporation | |
| CN108310938A (en) | By dechlorination to control the method and system of desulfurization wastewater discharge | |
| CN211367297U (en) | Desulfurization waste water zero release processing system | |
| CN111423046A (en) | Power plant desulfurization wastewater advanced treatment and resource utilization system and method | |
| CN106517628A (en) | Desulfurization-wastewater zero discharging device for coal-fired power plant | |
| CN109111009A (en) | A kind of desulfurization wastewater technique of zero discharge and device | |
| CN107827306A (en) | A kind of thermal power plant desulfurization wastewater zero-discharge treatment system | |
| CN108619871B (en) | Method and device for treating flue gas and flue gas desulfurization wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20171218 |