CN206368087U - A kind of SCR denitration regenerates the processing system of pickling waste waters - Google Patents
A kind of SCR denitration regenerates the processing system of pickling waste waters Download PDFInfo
- Publication number
- CN206368087U CN206368087U CN201621435629.XU CN201621435629U CN206368087U CN 206368087 U CN206368087 U CN 206368087U CN 201621435629 U CN201621435629 U CN 201621435629U CN 206368087 U CN206368087 U CN 206368087U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- processing system
- pickling
- acid solution
- waste liquid
- 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.)
- Active
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model provides the processing system that a kind of SCR denitration regenerates pickling waste waters, and the system includes for the sedimentation basin for receiving original pickling waste waters, electrodialysis cell, acid solution storage tank, pH regulating reservoirs, intermediate sedimentation pond, film upgrading unit, evaporative crystallization unit and sludge dewatering unit；The utility model is additionally provided handles the method that SCR denitration regenerates pickling waste waters using above-mentioned processing system；The utility model is according to the feature of waste water, devise acid solution and recycle link, on the one hand the service efficiency of acid solution is added, on the other hand reduce because direct pH adjusts a large amount of inorganic salts produced, i.e. the yield of evaporative crystallization link crystal salt, can meet the processing requirement that such SCR denitration regenerates pickling wastewater zero discharge.
Description
Technical field
The utility model belongs to industrial waste water treatment, and in particular to a kind of SCR denitration regenerates pickling
The processing system of waste water.
Background technology
With《Fossil-fuel power plant atmospheric pollutant emission standard》(GB13223-2011) integral implementation, with selective catalysis also
Denitration technology based on former method (SCR) is widely applied in coal-burning power plant.Due to the limit of wherein catalyst service life
System, its activity can be gradually reduced, it is necessary to be changed in time after activity is reduced to a certain extent.The catalysis of this partial inactivation
If directly discarded, it will bring serious secondary pollution problem, meanwhile, fresh catalyst is changed, can also increase purchase cost,
Influence the operation benefits of power plant.SCR denitration regeneration techniques can extend the service life of catalyst, reduce the fortune of power plant
Row cost, the problem of environmental pollution that reduces the processing cost of disposal of waste catalyst and may bring, therefore, denitrating catalyst
Regeneration is the necessity of current industry development.In recent years, denitrating catalyst regeneration enterprise just gradually builds up in various regions.
SCR denitration regenerative process generally includes the links such as physics deashing, ultrasonic washing, pickling, activity load, by
In being related to watering technology, therefore, substantial amounts of industrial wastewater can be produced.Usually contained in waste water substantial amounts of suspension, vanadium, arsenic,
The heavy metal elements such as tungsten, and pH is relatively low, it is necessary to handle waste water.Raising due to country and place to environmental requirement, mesh
Before, the processing of SCR denitration regenerative wastewater is generally using the zero-emission scheme of film concentration-evaporative crystallization.
The kind of waste water and water produced in SCR denitration regenerative process differs greatly, wherein, ultrasonic water rinses
The waste water quality of generation is relatively simple, mainly contains the suspensions such as lime-ash；The waste water water that active load stage is produced is smaller；And
The water of pickling waste waters is larger, pH is low, containing heavy metal elements such as vanadium, arsenic, is the key of wastewater treatment.Using traditional alkali lye
Neutralization method handles pickling waste waters, on the one hand can produce the higher waste liquid of salt content, increases the negative of subsequent film concentration-evaporative crystallization
The yield of load and crystal salt, still further aspect can cause the waste of acid solution.
The content of the invention
The purpose of this utility model is to provide the processing system that a kind of SCR denitration regenerates pickling waste waters, structure letter
Single, high treating effect can fully meet the requirement of zero discharge of industrial waste water, can meet such SCR denitration regenerated acid
Wash the processing requirement of waste water.
In order to achieve the above object, the utility model is adopted the following technical scheme that：
A kind of SCR denitration regenerates the processing system of pickling waste waters, including for receiving the heavy of original pickling waste waters
Shallow lake pond 1, electrodialysis cell 2, acid solution storage tank 3, pH regulating reservoirs 4, intermediate sedimentation pond 5, film upgrading unit 6, the and of evaporative crystallization unit 7
Sludge dewatering unit 8；
Wherein, the sedimentation basin 1 is connected with the pickling tube in regeneration technology by pipeline, and controlled valve is provided with pipeline
Door, the top of sedimentation basin 1 is less than pickling tube bottom, realizes that pickling waste waters is emitted into sedimentation basin by pickling tube by gravity stream；
The sedimentation basin 1, electrodialysis cell 2, pH regulating reservoirs 4, intermediate sedimentation pond 5, film upgrading unit 6, evaporative crystallization list
The pipeline that member 7 passes sequentially through Valve controlling is connected, and water pump is provided with pipeline；
The sedimentation basin 1 and the bottom of intermediate sedimentation pond 5 are connected by the pipeline of Valve controlling with sludge dewatering unit 8；
The electrodialysis cell 2 is connected with acid solution storage tank 3 by the pipeline of Valve controlling, and metering diaphragm is provided with pipeline
Pump and flowmeter；
The electrodialysis cell 2 is made up of anode chamber, cathode chamber, waste liquid chamber, recovery room, waste liquid tank and accumulator tank, anode
Room and cathode chamber are located at the two ends of cell body respectively, are internally provided with platinum electrode；Waste liquid chamber and recovery room in the middle of cell body by the moon from
Proton exchange and univalent cation exchange membrane are separated to form, and univalent cation exchange membrane does not allow vanadium, tungsten, calcium high-valence cationic to lead to
Cross；Waste liquid chamber and recovery room are connected with waste liquid tank and accumulator tank by pipeline respectively, and water pump is provided with pipeline；The electrodialysis
Waste liquid tank in unit 2 is connected with sedimentation basin 1 and pH regulating reservoirs 4 respectively by the pipeline of Valve controlling, be provided with pipeline every
Film measures water pump, and metering diaphragm pump discharge is provided with flowmeter；The acid solution storage tank 3 is led to the accumulator tank in electrodialysis cell 2
The pipeline for crossing Valve controlling is connected, and diaphragm metering pump is installed in pipeline, metering diaphragm pump discharge is provided with flowmeter.
PH meter, agitating device, sodium hydroxide chemicals dosing plant and coagulant drug-adding device are set in the pH regulating reservoirs 4.
The film upgrading unit 6 includes sand filtration, charcoal absorption, resins exchange, ultrafiltration and two-pass RO system, and
Pure water and concentrated water collection device.
The evaporative crystallization unit 7 is mechanical recompression evaporator.
The sludge dewatering unit 8 employs Stacked sludge dewatering machine, by the pipeline of Valve controlling and sedimentation basin 1 and
The bottom in intermediate sedimentation pond 5 is connected, and sludge delivery pump is set in pipeline.
A kind of SCR denitration regenerates the processing method of pickling waste waters, and this method is realized using said system, institute
The method of stating includes：
1) SCR denitration is regenerated into pickling discharge of wastewater to sedimentation basin 1, obtains clarified solution and sediment；
2) by above-mentioned steps 1) in clarified solution be delivered in electrodialysis cell 2, regulation current density and action time is returned
Sulfuric acid solution is received, the waste liquid containing vanadium, tungsten heavy metal element is produced；
3) by above-mentioned steps 2) in the sulfuric acid solution that is recovered to be delivered in acid solution storage tank 3, generation is contained into vanadium, tungsten weight
The waste liquid of metallic element is delivered in pH regulating reservoirs 4；
4) sulfuric acid solution in acid solution storage tank 3 is used for the cleaning fluid for preparing acid cleaning process；
5) pH value of waste liquid is adjusted to 6-8 by the sodium hydroxide chemicals dosing plant in pH regulating reservoirs 4, adjusts basis after pH
Need to add and be sufficiently stirred in coagulant, course of reaction；
6) by above-mentioned steps 5) in handle after waste liquid be delivered in intermediate sedimentation pond 5 and staticly settle more than 30 minutes, obtain
To clarified solution and sediment；
7) by above-mentioned steps 6) in clarified solution be delivered to film upgrading unit 6, it is isolated can reuse fresh water and dense salt
Water；
8) by above-mentioned steps 7) in strong brine be delivered to evaporative crystallization unit 7, obtain crystal salt and condensed water；
9) by above-mentioned steps 1) and step 6) sediment that produces is delivered to sludge dewatering unit 8, produces moisture content 80%
Half dry solid；
The electrodialysis cell 2 has used univalent cation exchange membrane, and average current density is 0.05-0.07Acm‐1,
Electrodialysis time control was at 2-4 hours, and retrieval of sulfuric acid rate is more than 80%.
Step 5) in the NaOH solution for mass concentration 40% that uses, 6-8, step 5 are arrived into the pH regulations of waste liquid) in plus
The coagulant entered is that the polyaluminium aluminum concentration in polymeric aluminum chlorides solution, waste liquid is controlled in 100-500mg/L, and mixing time is
10-15 minutes, sedimentation time 30-45 minute.
The step 7) in film upgrading unit 6 producing water ratio be 90%-95%, remaining 5%-10% be strong brine.
The step 8) in the steam of evaporative crystallization unit 7 produced using electrically heated mode, or be passed through Boiler Steam, produce
Raw recycling condensing water is in regeneration technology.
Compared to the prior art compared with the utility model possesses following advantage：
1) it is the water quality characteristic for pickling waste waters the characteristics of the utility model, is recycled using electrodialytic method
Part acid solution, is recycled and reused for pickling link, adds the service efficiency of acid solution, while reducing the usage amount of alkali lye and due to straight
A large amount of inorganic salts that pH regulations are produced are connect, is conducive to improving the efficiency of film concentration and evaporative crystallization link, reduces evaporative crystallization
The yield of link crystal salt amount.
2) the utility model is directed to water quality characteristic design technology, and simple in construction, high treating effect can fully meet industry
The requirement of wastewater zero discharge, can meet the processing requirement that such SCR denitration regenerates pickling waste waters.
Brief description of the drawings
Fig. 1 is the processing system schematic diagram that a kind of SCR denitration regenerates pickling waste waters.
Embodiment
The utility model is further illustrated below by specific embodiment, but these embodiments are only in more detail
Specifically describe and be used, and be not to be construed as limiting the utility model in any form.
Embodiment 1
As shown in figure 1, the SCR denitration Waste Water Treatment of the present embodiment mainly includes sedimentation basin 1, electrodialysis list
Member 2, acid solution storage tank 3, pH regulating reservoirs 4, intermediate sedimentation pond 5, film upgrading unit 6, evaporative crystallization unit 7, sludge dewatering unit 8.
Waste water from SCR denitration acid cleaning process section contains certain suspension, and content is about 100mg/L, mainly
Do not clear up the lime-ash of removal and the catalyst of partial crushing, wastewater pH≤1 completely for previous step, and contain the huge sum of money such as vanadium, arsenic
Belong to ion, the content of vanadium ion is about 80mg/L.
Pickling waste waters is discharged into sedimentation basin 1 by gravity stream, staticly settles after 30 minutes, base sludge is delivered to sludge dewatering
Unit 8 is dehydrated, and produces half dry solid of water content about 80%, and supernatant is delivered to electrodialysis cell by diaphragm metering pump
2。
The two ends of cell body are anode chamber and cathode chamber in electrodialysis cell 2, and inside has in the middle of platinum electrode, cell body by anion
Exchange membrane and univalent cation exchange membrane are separated to form waste liquid chamber and recovery room.Current density is adjusted to 0.06Acm‐1, make back
The liquid in groove and waste liquid tank is received by the effect difference recovered room of recycle stream of water circulating pump and waste liquid chamber, hydrogen ion and sulfuric acid
Radical ion is enriched with recovery room, and enters accumulator tank, and the heavy metal ion such as vanadium ion of high price is then trapped within
In waste liquid chamber, and enter waste liquid tank.Electrodialytic reaction time control was at 3 hours, and the rate of recovery of acid solution is more than 80%.
Electrodialysis cell 2 is recovered to acid solution and is pumped into by metering diaphragm in acid solution storage tank 3, needed for preparing as needed
The acidic cleaning solution of concentration.
The waste liquid that electrodialysis cell 2 is produced is delivered into pH regulating reservoirs 4 by water pump.Stirring speed in pH regulating reservoirs 4
Degree control is added the NaOH solution of mass fraction 40% by diaphragm metering pump, controlled by online pH meter at 100 revs/min
Chemical feeding quantity so that the pH of mixed liquor is adjusted to 6-8.
Waste water in pH regulating reservoirs 4 further adds the aluminium polychloride coagulation of mass fraction 10% after pH is adjusted
Agent so that the concentration of aluminium polychloride is 100mg/L in waste water, while being kept stirring for speed at 100 revs/min, stirs 10-15
Minute.
The water outlet of pH regulating reservoirs 4 is delivered in intermediate sedimentation pond 5 with water pump, staticly settled 30 minutes, bottom precipitation
Muddy water mixed solution is delivered to sludge dewatering unit 8 and is dehydrated, and top clarified solution is delivered at film upgrading unit 6 with water pump
Vanadium ion concentration drop is less than 2mg/L in reason, clarified solution.
The recovery of film upgrading unit 6 obtains 95% fresh water, and fresh water electrical conductivity is less than 60 μ S/cm, available for preparation pickle
Or other regeneration technology sections, while 5% concentrated water is obtained, into evaporative crystallization unit 7.
In evaporative crystallization unit 7 using electrical heating produce steam, waste water is produced after evaporative crystallization contain vanadium, tungsten,
Calcium, magnesium, the crystal salt of sodium plasma, while the condensed water of regeneration technology can be back to by producing.
Although a certain degree of description has been carried out in the utility model, it will be apparent that, do not departing from essence of the present utility model
God can carry out the appropriate change of each condition with conditions of scope.It is appreciated that the utility model is not limited to the embodiment party
Case, and it is attributed to the scope of claim, it includes the equivalent substitution of each factor.
Claims (5)
1. a kind of SCR denitration regenerates the processing system of pickling waste waters, it is characterised in that：Including for receiving original pickling
The sedimentation basin (1) of waste water, electrodialysis cell (2), acid solution storage tank (3), pH regulating reservoirs (4), intermediate sedimentation pond (5), film concentration are single
First (6), evaporative crystallization unit (7) and sludge dewatering unit (8)；
Wherein, the sedimentation basin (1) is connected with the pickling tube in regeneration technology by pipeline, and controllable valve is provided with pipeline,
It is less than pickling tube bottom at the top of sedimentation basin (1)；
The sedimentation basin (1), electrodialysis cell (2), pH regulating reservoirs (4), intermediate sedimentation pond (5), film upgrading unit (6), evaporation
The pipeline that crystalline element (7) passes sequentially through Valve controlling is connected, and water pump is provided with pipeline；
The sedimentation basin (1) and intermediate sedimentation pond (5) bottom are connected by the pipeline of Valve controlling with sludge dewatering unit (8)；
The electrodialysis cell (2) is connected with acid solution storage tank (3) by the pipeline of Valve controlling, and metering diaphragm is provided with pipeline
Pump and flowmeter.
2. processing system according to claim 1, it is characterised in that：The electrodialysis cell (2) is by anode chamber, negative electrode
Room, waste liquid chamber, recovery room, waste liquid tank and accumulator tank composition, anode chamber and cathode chamber are located at the two ends of cell body respectively, and inside is set
There is platinum electrode；Waste liquid chamber and recovery room in the middle of cell body are separated to form by anion-exchange membrane and univalent cation exchange membrane, single
Valency cation-exchange membrane does not allow vanadium, tungsten, calcium high-valence cationic to pass through；Waste liquid chamber and recovery room respectively with waste liquid tank and accumulator tank
It is connected by pipeline, water pump is installed in pipeline；The pipeline point that waste liquid tank in the electrodialysis cell (2) passes through Valve controlling
It is not connected with sedimentation basin (1) and pH regulating reservoirs (4), metering diaphragm water pump is installed on pipeline, metering diaphragm pump discharge is provided with
Flowmeter；The acid solution storage tank (3) is connected with the accumulator tank in electrodialysis cell (2) by the pipeline of Valve controlling, in pipeline
Diaphragm metering pump is installed, metering diaphragm pump discharge is provided with flowmeter.
3. processing system according to claim 1, it is characterised in that：PH meter, stirring dress are set in the pH regulating reservoirs (4)
Put, sodium hydroxide chemicals dosing plant and coagulant drug-adding device.
4. processing system according to claim 1, it is characterised in that：The evaporative crystallization unit (7) is mechanical recompression
Evaporator.
5. processing system according to claim 1, it is characterised in that：The sludge dewatering unit (8) employs folded spiral shell formula
Sludge dewatering equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621435629.XU CN206368087U (en) | 2016-12-23 | 2016-12-23 | A kind of SCR denitration regenerates the processing system of pickling waste waters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621435629.XU CN206368087U (en) | 2016-12-23 | 2016-12-23 | A kind of SCR denitration regenerates the processing system of pickling waste waters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206368087U true CN206368087U (en) | 2017-08-01 |
Family
ID=59393863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621435629.XU Active CN206368087U (en) | 2016-12-23 | 2016-12-23 | A kind of SCR denitration regenerates the processing system of pickling waste waters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206368087U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746119A (en) * | 2016-12-23 | 2017-05-31 | 中国华能集团清洁能源技术研究院有限公司 | A kind of SCR denitration regenerates the processing system and method for pickling waste waters |
-
2016
- 2016-12-23 CN CN201621435629.XU patent/CN206368087U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746119A (en) * | 2016-12-23 | 2017-05-31 | 中国华能集团清洁能源技术研究院有限公司 | A kind of SCR denitration regenerates the processing system and method for pickling waste waters |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103979729A (en) | Desulfurization waste water recycling and zero discharge system and method | |
| CN103755082B (en) | System and method for resource recovery of regenerated wastewater of ion exchange resin | |
| JPH0952087A (en) | Water treatment method and apparatus therefor | |
| CN203878018U (en) | Desulfurization wastewater recycling and zero-discharge system | |
| CN212403781U (en) | But resource recovery's desulfurization effluent disposal system | |
| CN111268834A (en) | Desulfurization wastewater treatment system and method capable of recycling resources | |
| CN107915360A (en) | Zero-emission crystallization divides salt device and technique | |
| CN206266392U (en) | A kind of papermaking wastewater zero-discharge treatment system | |
| CN105585198A (en) | High-efficiency economical thermal power plant tail end desulfurization wastewater softening and evaporation treatment system and method | |
| CN107585968B (en) | A kind of chlor-alkali brine waste processing system and method | |
| CN110117722A (en) | Vanadium titanium tungsten system denitrating catalyst resource utilization and water circulation utilization system and method | |
| CN206352096U (en) | Desulfurization wastewater zero-discharge treatment system is carried out using flue evaporative crystallization | |
| CN110451707A (en) | A kind of waste water of mine Zero discharge treatment method | |
| CN110902898B (en) | Device and method for removing nitrogen and phosphorus in sewage by magnesium anode electrodialysis method | |
| CN112624446A (en) | Organic wastewater zero-discharge treatment process | |
| CN106186437A (en) | A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon | |
| CN108862472A (en) | A kind of advanced waste treatment method of ion exchange resin and the integrated removing nitrate nitrogen of electrochemistry | |
| CN105152444B (en) | A kind of recovery comprehensive processing technique of HBCD production Sewage advanced treatments and bromine in waste water | |
| CN206368087U (en) | A kind of SCR denitration regenerates the processing system of pickling waste waters | |
| CN204434415U (en) | Concentrating and treating system is softened in a kind of heat-engine plant desulfurized Wastewater by Electric dialysis | |
| CN205575835U (en) | Electroplating wastewater treatment system | |
| CN203768157U (en) | Ion exchange resin regenerated waste water resource recycling system | |
| CN101503257B (en) | Method and apparatus for recovering and treating ammonium nitrate condensate liquid wastewater | |
| CN108483710B (en) | Comprehensive seawater utilization method and system | |
| CN217677157U (en) | Circulating cooling water zero-pollution discharge treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |