CN206901925U - The device of novel desulphurization wastewater treatment - Google Patents
The device of novel desulphurization wastewater treatment Download PDFInfo
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- CN206901925U CN206901925U CN201720688880.5U CN201720688880U CN206901925U CN 206901925 U CN206901925 U CN 206901925U CN 201720688880 U CN201720688880 U CN 201720688880U CN 206901925 U CN206901925 U CN 206901925U
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Abstract
The utility model provides a kind of device of novel desulphurization wastewater treatment.Including what is set gradually along waste water stream：One reactor, one first medicament addition device is configured, to add sulfate radical precipitating reagent；One flocculation reactor, a second medicament throwing device is configured, to add flocculant and flocculation aid；One sedimentation basin；One film processing system.Desulfurization wastewater processing cost can be reduced, and reduces sludge yield.
Description
Technical field
The utility model belongs to environmental protection technical field, and in particular to a kind of device of novel desulphurization wastewater treatment.
Background technology
Coal fired power generation occupies critical role in China's energy resource supply.For environment protection, China is most in recent years
Number power plant employs Limestone-gypsum Wet Flue Gas Desulfurization Process technology, to remove the sulfur dioxide in flue gas.Coal-burning power plant's wet desulphurization
Waste component is complicated, contains high concentration suspended matter, oversaturated sulphite, chlorion, sulfate and various heavy.Mesh
Preceding desulfurization wastewater is mainly handled using chemical precipitation method, part index number difficulty up to standard, even if after processing up to standard, due to big in waste water
The presence of the sulfate and chloride of amount, water outlet salt content are still up to 2%~4%, it is difficult to reuse, can also caused after outer row
Surface water and soil ecology destroy, and cause secondary pollution.Therefore, the exploitation of desulfurization wastewater zero discharge treatment technology increasingly by
Pay attention to.
Evaporative crystallization method is desulfurization wastewater Zero-discharge treating process main at present.Have following two using evaporative crystallization method
The shortcomings that individual aspect：First is evaporative crystallization cost height, needs to consume the substantial amounts of energy using evaporative crystallization technique, therefore, fortune
Row expense is high；Second, minimizing processing is carried out to waste water using membrane separation techniques such as counter-infiltrations first, it is dense caused by UF membrane
Water is evaporated crystallization again, can effectively reduce evaporation process load and save processing cost, but use the film process works such as RO
Need to carry out waste water strict pretreatment during skill, because calcium and magnesium concentration is high in waste water, calcium sulfate is in hypersaturated state, caused
Softening pretreatment cost is high, general up to 15~30 yuan/ton, but also can produce substantial amounts of precipitating sludge.
In order to reduce desulfurization wastewater zero discharge treatment cost, in view of the shortcomings that existing desulfurization wastewater technique of zero discharge and not
Foot, the desulfurization wastewater zero discharge treatment device and method ever more important of developing low-cost.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of device of novel desulphurization wastewater treatment.It can drop
Low desulfurization wastewater processing cost, and reduce sludge yield.
For the above-mentioned purpose, the concrete technical scheme of the utility model use is：
A kind of device of novel desulphurization wastewater treatment, including set gradually along waste water stream：
One reactor, one first medicament addition device is configured, to add sulfate radical precipitating reagent；
One flocculation reactor, a second medicament throwing device is configured, to add flocculant and flocculation aid；
One sedimentation basin；
One film processing system.
Further, the inside reactor is provided with one first agitating device；One the is provided with inside the flocculation reactor
Two agitating devices.
Further, first agitating device is impeller-type stirrer or aerator；Second agitating device is
Impeller-type stirrer.
Further, in addition to a pretreatment system of reactor flowpath upstream is arranged at, the pretreatment system is selected from
The combination of one or more systems in suspended matter processing system, heavy metal treatment systems, COD/BOD processing systems.
Further, the reactor is also configured with an additional medicaments throwing device, to add heavy metals removal medicament
And/or COD removes medicament.
Further, the film processing system is one kind or several in counter-infiltration, nanofiltration, membrane distillation, electrodialysis, positive infiltration
The combination of kind.
The method that corresponding aforementioned means carry out desulfurization wastewater processing, comprises the following steps：
Sulfate radical precipitating reagent is added into desulfurization wastewater, obtains single treatment waste water；
Flocculant and flocculation aid are added to single treatment waste water, obtains after-treatment waste water；
Precipitation process is carried out to after-treatment waste water, obtains precipitating sludge and clear liquid；
Membrane distillation processing is carried out to clear liquid.
Further, the sulfate radical precipitating reagent is selected from barium chloride or barium nitrate；The flocculant is bodied ferric sulfate, institute
It is polyacrylamide (PAM) to state flocculation aid.
Further, 5~20 minutes reaction time is controlled after sulfate radical precipitating reagent is added into desulfurization wastewater.
Further, in addition to, pre-processed first before adding sulfate radical precipitating reagent into desulfurization wastewater, the pre- place
Reason includes going oil removal to pre-process and/or go removing heavy metals to pre-process and/or remove COD/BOD pretreatments.
The utility model overturns tradition softening roadmap, solves desulfurization wastewater film concentration process fouling using reverse thinking
Problem, by adding sulfate radical precipitating reagent, all or part of sulfate radical in waste water is removed, it is possible to prevente effectively from calcium sulfate knot
Dirt, with technique is simple, added amount of chemical is few, operating cost is low, sludge yield is few and is easy to what is be combined with other techniques
Advantage.
Brief description of the drawings
Fig. 1 is the arrangement schematic diagram of the device of novel desulphurization wastewater treatment in the embodiment of the utility model one.
Fig. 2 is the arrangement schematic diagram of the device of novel desulphurization wastewater treatment in another embodiment of the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clear, complete description.
As shown in figure 1, in one embodiment, there is provided a kind of device of novel desulphurization wastewater treatment, including along waste water stream
Set gradually：Reactor 2, configuration medicament A throwing devices (the first medicament addition device), to add sulfate radical precipitating reagent,
Medicament A can be directly added into reactor 2 using compound pump, can also be mixed on the front-end pipelines of reactor 2 using pipeline
Device adds.Flocculation reactor 4, configuration combination medicament B throwing devices (second medicament throwing device), to add flocculant and help
Solidifying agent；Sedimentation basin 6；Film processing system 9.The bottom of sedimentation basin 6 is provided with mud discharging mouth 7.Water pump 8 is by the clear liquid pump of sedimentation basin 6
To film processing system 9, film processing system 9 has the film process production mouth of a river 10 and film process concentrated water spout 11.Wherein, medicament A dosages
With the control of sulfate radical in waste water residual volume, can flexibly be controlled with reference to subsequent film concentration.
The core that above-described embodiment is described as device is formed, in another embodiment, as shown in Fig. 2 being set inside reactor 2
There is the first agitating device 3；The inside of flocculation reactor 4 is provided with the second agitating device 5.Wherein, the first agitating device 3 is, for example, impeller
Formula agitator or aerator；Second agitating device 5 is, for example, impeller-type stirrer.Also include being arranged on the stream of reactor 2
The pretreatment system 1 of trip, pretreatment system 1 are selected from suspended matter processing system, heavy metal treatment systems, COD/BOD processing systems
In one or more systems combination.Pretreatment system 1 can be not provided with according to being actually needed, i.e., former desulfurization wastewater is directly entered
In reactor 2, specifically, as the relatively low (SS of suspension in raw water<During 1000mg/L), you can it is not provided with pretreatment system.
In addition, reactor 2 is also configured with an additional medicaments throwing device (not shown), when needing to remove heavy metal in waste water
Or during COD, medicament is removed to add heavy metals removal medicament and/or COD.
Although and film processing system 9 is simply illustrated in figure, be actually then chosen as counter-infiltration, nanofiltration, membrane distillation,
One or more of combinations in electrodialysis, positive infiltration.
The method that corresponding aforementioned means carry out desulfurization wastewater processing, comprises the following steps：
Sulfate radical precipitating reagent is added into desulfurization wastewater, obtains single treatment waste water；Add and flocculate to single treatment waste water
Agent and flocculation aid, obtain after-treatment waste water；Precipitation process is carried out to after-treatment waste water, obtains precipitating sludge and clear liquid；It is right
Clear liquid carries out membrane distillation processing.
The apparatus and method described with reference to above-described embodiment, take certain power plant's practical sulphur removal waste water, desulfurization wastewater initially enters
Pretreatment system 1, reactor 2 is entered after pretreatment, turn on agitator 3, ensures that water quality is uniform in reactor, to reactor
Sulfate radical precipitating reagent is added in 2, such as barium chloride, sulfate radical can equally be gone using barium nitrate, but reagent cost can increase,
A large amount of nitrate ions can be introduced simultaneously, cause water quality to change increase, and a large amount of chlorions in raw water be present, are drawn using barium chloride
The chlorine entered can be ignored, therefore the present embodiment preferably sulfuric acid root precipitating reagent is barium chloride；The sulfate radical in waste water is set fully to react simultaneously
Generate barium sulfate precipitate and separated out from waste water, 5~20 minutes general control reaction time.
Waste water in reactor 2 enters in flocculation reactor 4, adds flocculant and flocculation aid into flocculation reactor 4, makes
Suspended particle in waste water forms larger particles, improves mud-water separation effect.
The water outlet of flocculation reactor 4 enters sedimentation basin 6, realizes mud-water separation under gravity, and caused sludge enters one
After step concentration, dehydration, outward transport disposal,
It is back to after precipitating sludge is concentrated in desulfurizing tower or gypsum dehydration machine；
The supernatant of sedimentation basin 6 is by water pump 8, by the processing such as filtering, to ensure to meet that follow-up film processing system water inlet will
Ask, waste water is after the concentration of film processing system 9, and production Water circulation is produced or lived in power plant, and concentrated water is further handled.
Concentrated water caused by film processing system 9, can be evaporated crystallization treatment into crystallizing evaporator, formed calcium chloride and
Ratio of evaporation salt.It can also spray into and flue evaporation process is carried out in flue, the salinity in waste water enters fine coal by deduster
In ash.
Confirmatory explanation is carried out to the utility model technique effect with case history and actual experiment data below.
Case history 1：
Take certain power plant's practical sulphur removal waste water, concentration of suspension about 20000mg/L in waste water first will be useless by simple filtration
Suspension in water removes, and the calcium ion content in waste water is 2700mg/L, magnesium ion 520mg/L, and sulfate concentration is
1017mg/L.Following two groups of experiments are carried out respectively：
Experiment one, using traditional softening process, i.e. milk of lime+soda ash tenderizer, adds stone into 1000mL waste water first
Wastewater pH is modulated 11.5 by grey breast (mass concentration is 5% suspension), while waste water is stirred, it is ensured that reaction fully and
Uniformly, waste water is handled by flocculation sediment after reacting 15min, and the magnesium ion production magnesium hydrate precipitate in waste water simultaneously enters sludge
In, sodium carbonate (mass concentration is 10% solution) is added in clear liquid then up, calcium ion concentration in waste water is reduced to 20mg/
L, the results showed that added amount of chemical is milk of lime 3.70g/L, soda ash 9.50g/L.According to the market price, lime is respectively with soda ash
500 and 1500 yuan/ton, required medicament totle drilling cost is about 16 yuan/ton.After measured, (sedimentation time is after two-stage precipitation
20min), precipitating sludge cumulative volume about 200mL.Waste water after processing can meet film concentration inflow requirement.
Experiment two：Using the utility model technique, barium chloride (mass concentration 10%) solution is added into 1000mL waste water,
After reaction 10 minutes, flocculant and flocculation aid are added into waste water, then after precipitation clarification 15min, determines supernatant sulfate radical
Concentration, found through overtesting, the sulfate radical in waste water is down to 14.7mg/L, now barium chloride dosage is 3.1g/L, according to
2600 yuan/ton of the barium chloride market price, then about 8 yuan of ton cost of water treatment.After measured, 15min precipitation after sludge volume about
80mL.Waste water after raw processing can meet film concentration inflow requirement.
As can be seen from the above-described embodiment, it is only 8 using PROCESS FOR TREATMENT desulfurization wastewater of the present utility model, medicament expense
Yuan/ton, 16 yuan/ton than traditional softening process are greatly reduced, and caused sludge quantity is also greatly reduced, and advantageously reduce follow-up
Treatment of Sludge load and processing cost.
Case history 2：
In certain coal-burning power plant's practical sulphur removal wastewater zero discharge processing item, in order to verify new solution in the utility model
Feasibility, the technology path that the desulfurization wastewater of 2 300MW units is respectively adopted in traditional handicraft and this programme enters to waste water
Row processing.
Waste water quality is as follows：The ton hour of water about 14, suspension about 13000mg/L, the calcium ion content in waste water are
3100mg/L, magnesium ion are about 700mg/L, sulfate concentration 1500mg/L.First by after precipitation process by waste water
Suspension is removed, and waste water then is divided into 2 strands and handled：
The waste water of wherein first strand 8 ton hour enters conventional treatment systems, i.e., is handled using milk of lime+soda ash tenderizer,
Wastewater pH is modulated 11.5 by addition milk of lime first in waste water, while waste water is stirred, it is ensured that reaction is fully and uniform, instead
Waste water is handled by flocculation sediment after answering 30min, and the magnesium ion production magnesium hydrate precipitate in waste water simultaneously enters in sludge, then
Sodium carbonate (mass concentration is 10% solution) is added in supernatant, calcium ion concentration in waste water is reduced to 30mg/L, then gives up
Water enters shared micro-filtration+reverse osmosis concentration processing system after flocculation sediment.
The waste water of another ton hour of stock 8 then enters the utility model technology processing system, and it is molten to add barium chloride in waste water
Liquid, after reacting 20 minutes, waste water enters flocculation precipitation reaction pond, and then after wastewater sedimentation clarification, then waste water is heavy by flocculation
Enter shared micro-filtration+reverse osmosis concentration processing system behind shallow lake.
As a result show that 2 sets of processing systems are stable in 3 middle of the month continuously run, counter-infiltration system is without obvious knot
Dirty phenomenon, counter-infiltration system Water Sproading rate are 50%, and traditional scheme Chinese medicine dosage is milk of lime 5.60g/L, soda ash
12.2g/L.According to the market price, lime and soda ash are respectively 500 and 1500 yuan/ton, and required medicament totle drilling cost is about 21.1 yuan/
Ton.After measured, ton water sedimentation sludge (dry mud) total amount about 35Kg in melded system two-stage sedimentation basin.
In second burst of water treatment system using technology path in the utility model, the sulfate radical in waste water is down to
30mg/L, now barium chloride dosage is 4g/L, according to 2600 yuan/ton of the barium chloride market price, then ton cost of water treatment
About 10.4 yuan.After measured, ton water sedimentation sludge (dry mud) total amount about 8Kg in sedimentation basin.
It is can be seen that by above-mentioned engineering mimoir using the technique in the utility model, run in-line coagulation technique
Operation medicament expense can reduce by more than 50%, sludge quantity can reduce by 77%, remarkable in economical benefits.
Obviously, described embodiment is only the utility model part of the embodiment, rather than whole embodiments.It is based on
Embodiment in the utility model, those of ordinary skill in the art are obtained all under the premise of creative work is not made
Other embodiment, belong to the scope of the utility model protection.
Claims (6)
1. a kind of device of novel desulphurization wastewater treatment, it is characterised in that including what is set gradually along waste water stream：
One reactor, one first medicament addition device is configured, to add sulfate radical precipitating reagent；
One flocculation reactor, a second medicament throwing device is configured, to add flocculant and flocculation aid；
One sedimentation basin；
One film processing system.
2. the device of novel desulphurization wastewater treatment as claimed in claim 1, it is characterised in that the inside reactor is provided with one
First agitating device；One second agitating device is provided with inside the flocculation reactor.
3. the device of novel desulphurization wastewater treatment as claimed in claim 2, it is characterised in that first agitating device is leaf
Impeller agitator or aerator；Second agitating device is impeller-type stirrer.
4. the device of novel desulphurization wastewater treatment as claimed in claim 1, it is characterised in that also include being arranged at reactor stream
One pretreatment system of road upstream, the pretreatment system are selected from suspended matter processing system, heavy metal treatment systems, COD/BOD
The combination of one or more systems in processing system.
5. the device of novel desulphurization wastewater treatment as claimed in claim 1, it is characterised in that the reactor is also configured with one
Additional medicaments throwing device, medicament is removed to add heavy metals removal medicament and/or COD.
6. the device of novel desulphurization wastewater treatment as claimed in claim 1, it is characterised in that the film processing system is reverse osmosis
Thoroughly, one or more of combinations in nanofiltration, membrane distillation, electrodialysis, positive infiltration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720688880.5U CN206901925U (en) | 2017-06-14 | 2017-06-14 | The device of novel desulphurization wastewater treatment |
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| CN201720688880.5U CN206901925U (en) | 2017-06-14 | 2017-06-14 | The device of novel desulphurization wastewater treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107215980A (en) * | 2017-06-14 | 2017-09-29 | 大唐环境产业集团股份有限公司 | The device and method of novel desulphurization wastewater treatment |
| CN112875829A (en) * | 2021-01-25 | 2021-06-01 | 江苏海容热能环境工程有限公司 | Desulfurization wastewater purification system and purification method based on self-crystallization fluidized bed |
-
2017
- 2017-06-14 CN CN201720688880.5U patent/CN206901925U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107215980A (en) * | 2017-06-14 | 2017-09-29 | 大唐环境产业集团股份有限公司 | The device and method of novel desulphurization wastewater treatment |
| CN112875829A (en) * | 2021-01-25 | 2021-06-01 | 江苏海容热能环境工程有限公司 | Desulfurization wastewater purification system and purification method based on self-crystallization fluidized bed |
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