CN107117758A - A kind of power plant desulfurization wastewater low consumption Zero discharge treatment method - Google Patents
A kind of power plant desulfurization wastewater low consumption Zero discharge treatment method Download PDFInfo
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- CN107117758A CN107117758A CN201710412099.XA CN201710412099A CN107117758A CN 107117758 A CN107117758 A CN 107117758A CN 201710412099 A CN201710412099 A CN 201710412099A CN 107117758 A CN107117758 A CN 107117758A
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- CN
- China
- Prior art keywords
- desulfurization wastewater
- power plant
- low consumption
- discharge treatment
- zero discharge
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A kind of power plant desulfurization wastewater low consumption Zero discharge treatment method, carries out, waste water is pre-processed according to the following steps, adds pre-treatment medicaments；Separation of solid and liquid is carried out to desulfurization wastewater；Further remove the divalence and trivalent scale-forming ion in desulfurization wastewater；Desulfurization wastewater is concentrated using nanofiltration work principle of filter；Nanofiltration production water carries out reverse osmosis process processing；High concentration sodium chloride solution heating evaporation is concentrated；Strong brine condensing crystallizing is dehydrated, dried, and the beneficial effects of the invention are as follows realize the low-cost zero-discharge processing of desulfurization wastewater.
Description
Technical field
The present invention relates to nanofiltration dope processing technology field, at more particularly to a kind of power plant desulfurization wastewater low consumption zero-emission
Reason method.
Background technology
Coal-burning power plant is industrial trade water consumption rich and influential family and discharge of wastewater rich and influential family.With the waste water phase of power plant other systems discharge
Than the desulfurization waste water quality that wet desulfurizing process is produced is special, with salt content is high, suspension content is high, hardness is high, corrosivity
By force, the features such as water quality and quantity is changed greatly, environmental hazard is big.Even across conventional treatment, suspension, COD can still exceed country row
Standard is put, in addition, the micro heavy and high-concentration chlorine ion that contain in waste water, also influence the recycling of desulfurization wastewater, because
This desulfurization wastewater zero discharge treatment is imperative.
At present, domestic power plant desulfurization wastewater Zero-discharge treating process is in the starting stage, however it remains investment operating cost
Height, technology imperfection, secondary pollution problems.
The content of the invention
In order to overcome disadvantages mentioned above and deficiency, it is an object of the invention to provide a kind of power plant desulfurization wastewater low consumption zero-emission
Processing method, realizes the low-cost zero-discharge processing of desulfurization wastewater.
The purpose of the present invention is achieved through the following technical solutions：
A kind of power plant desulfurization wastewater low consumption Zero discharge treatment method, it is characterised in that carry out according to the following steps,
Step 1：Waste water is pre-processed, pre-treatment medicaments are added；
Step 2：Separation of solid and liquid is carried out to desulfurization wastewater；
Step 3：Further remove the divalence and trivalent scale-forming ion in desulfurization wastewater；
Step 4：Desulfurization wastewater is concentrated using nanofiltration work principle of filter；
Step 5：Nanofiltration production water carries out reverse osmosis process processing；
Step 6：High concentration sodium chloride solution heating evaporation is concentrated；
Step 7：Strong brine condensing crystallizing is dehydrated, dried.
In one of the embodiments, pre-treatment medicaments described in step 1 are sodium hydroxide, remove two in desulfurization wastewater
Valency and trivalent scale-forming ion.
In one of the embodiments, pre-treatment medicaments described in step 1 be sodium carbonate, remove desulfurization wastewater in calcium from
Son.
In one of the embodiments, the step 1 also includes addition sodium hypochlorite, for suppressing micro- life in desulfurization wastewater
Thing grows.
In one of the embodiments, it is provided with after the step 1 and secondary filter is carried out to pretreated water.
In one of the embodiments, separation of solid and liquid is carried out to desulfurization wastewater in the step 2 using tubular ultra-filtration membrane to enter
OK.
In one of the embodiments, in the step 3 further remove desulfurization wastewater in divalence and trivalent fouling from
Son is carried out by Na-ion exchanger.
Compared with prior art, power plant desulfurization wastewater low consumption Zero discharge treatment method of the invention has following beneficial effect
Really：
1st, this technique significantly improves the rate of recovery of nanofiltration, significantly using chemical dosing softening and tube type filter membrance handling process
Cost and operating cost are reduced, pretreatment cost reduces by more than 20%, and concentrate salinity is more than 10%.
2nd, the present invention realizes the low-cost zero-discharge processing of desulfurization wastewater, the reduction of desulfurization wastewater zero-emission integrated treatment cost
More than 30%, to solving actual used water problem, realize that sustainable development is significant.
Brief description of the drawings
Fig. 1 is process chart of the invention.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the better embodiment of the present invention.But, the present invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make to understand more the disclosure
Plus it is thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ",
For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " including one or more
The arbitrary and all combination of related Listed Items.
Referring to Fig. 1, a kind of power plant desulfurization wastewater low consumption Zero discharge treatment method, it is characterised in that enter according to the following steps
OK,
Step 1：Waste water is pre-processed, pre-treatment medicaments are added；
Step 2：Separation of solid and liquid is carried out to desulfurization wastewater；
Step 3：Further remove the divalence and trivalent scale-forming ion in desulfurization wastewater；
Step 4：Desulfurization wastewater is concentrated using nanofiltration work principle of filter；
Step 5：Nanofiltration production water carries out reverse osmosis process processing；
Step 6：High concentration sodium chloride solution heating evaporation is concentrated；
Step 7：Strong brine condensing crystallizing is dehydrated, dried.
By above step, the water in desulfurization wastewater is separated into re-using, water can be used as life, industry, will
Other impurity in desulfurization wastewater are separated in solid form, will not produce the pollutant being harmful to natural environment, can
The problem of thoroughly solving desulfurization wastewater environmental pollution, realizes desulfurization wastewater low consumption zero-emission.
In one of the embodiments, pre-treatment medicaments described in step 1 are sodium hydroxide, remove two in desulfurization wastewater
Valency and trivalent scale-forming ion, such as aluminium ion, iron ion, silicon ion, magnesium ion.
In one of the embodiments, pre-treatment medicaments described in step 1 be sodium carbonate, remove desulfurization wastewater in calcium from
Son.
In one of the embodiments, the step 1 also includes addition sodium hypochlorite, for suppressing micro- life in desulfurization wastewater
Thing grows.
In one of the embodiments, it is provided with after the step 1 and secondary filter, the precision of setting is carried out to pretreated water
Filtering can remove the solid waste in waste water, it is ensured that solid impurity is not present in waste water.
In one of the embodiments, separation of solid and liquid is carried out to desulfurization wastewater in the step 2 using tubular ultra-filtration membrane to enter
OK, discharged after the impurity separated is dehydrated by tubular ultra-filtration membrane, tubular membrane is different from other micro-filtrations or milipore filter,
It is run using cross-current flow, in operation and recoil and anhydrous loss.Therefore, 100% time in fact can almost be obtained
Yield, reverse osmosis units are sent to after almost all of water inlet is filtered by tube type filter membrance.
In one of the embodiments, in the step 3 further remove desulfurization wastewater in divalence and trivalent fouling from
Son is carried out by Na-ion exchanger.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (7)
1. a kind of power plant desulfurization wastewater low consumption Zero discharge treatment method, it is characterised in that carry out according to the following steps,
Step 1：Waste water is pre-processed, pre-treatment medicaments are added；
Step 2：Separation of solid and liquid is carried out to desulfurization wastewater；
Step 3：Further remove the divalence and trivalent scale-forming ion in desulfurization wastewater；
Step 4：Desulfurization wastewater is concentrated using nanofiltration work principle of filter；
Step 5：Nanofiltration production water carries out reverse osmosis process processing；
Step 6：High concentration sodium chloride solution heating evaporation is concentrated；
Step 7：Strong brine condensing crystallizing is dehydrated, dried.
2. a kind of power plant desulfurization wastewater low consumption Zero discharge treatment method according to claim 1, it is characterised in that step 1
Described in pre-treatment medicaments be sodium hydroxide, remove desulfurization wastewater in divalence and trivalent scale-forming ion.
3. a kind of power plant desulfurization wastewater low consumption Zero discharge treatment method according to claim 2, it is characterised in that step 1
Described in pre-treatment medicaments be sodium carbonate, remove desulfurization wastewater in calcium ion.
4. according to a kind of any described power plant desulfurization wastewater low consumption Zero discharge treatment methods of claim 1-3, it is characterised in that
The step 1 also includes addition sodium hypochlorite, for suppressing microbial growth in desulfurization wastewater.
5. a kind of power plant desulfurization wastewater low consumption Zero discharge treatment method according to claim 1, it is characterised in that the step
It is provided with after rapid 1 and secondary filter is carried out to pretreated water.
6. a kind of power plant desulfurization wastewater low consumption Zero discharge treatment method according to claim 1, it is characterised in that the step
Separation of solid and liquid is carried out in rapid 2 to desulfurization wastewater to carry out using tubular ultra-filtration membrane.
7. a kind of power plant desulfurization wastewater low consumption Zero discharge treatment method according to claim 1, it is characterised in that the step
The divalence and trivalent scale-forming ion further removed in rapid 3 in desulfurization wastewater is carried out by Na-ion exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710412099.XA CN107117758A (en) | 2017-06-05 | 2017-06-05 | A kind of power plant desulfurization wastewater low consumption Zero discharge treatment method |
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| CN201710412099.XA CN107117758A (en) | 2017-06-05 | 2017-06-05 | A kind of power plant desulfurization wastewater low consumption Zero discharge treatment method |
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| Publication Number | Publication Date |
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| CN107117758A true CN107117758A (en) | 2017-09-01 |
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| CN201710412099.XA Pending CN107117758A (en) | 2017-06-05 | 2017-06-05 | A kind of power plant desulfurization wastewater low consumption Zero discharge treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109956579A (en) * | 2017-12-22 | 2019-07-02 | 神华集团有限责任公司 | The preprocess method and system of coal-burning power plant's desulfurization wastewater with high salt |
| CN112010437A (en) * | 2019-05-29 | 2020-12-01 | 西安得在电力科技有限公司 | Method and device for treating power plant desulfurization wastewater by using nano membrane and application |
-
2017
- 2017-06-05 CN CN201710412099.XA patent/CN107117758A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109956579A (en) * | 2017-12-22 | 2019-07-02 | 神华集团有限责任公司 | The preprocess method and system of coal-burning power plant's desulfurization wastewater with high salt |
| CN112010437A (en) * | 2019-05-29 | 2020-12-01 | 西安得在电力科技有限公司 | Method and device for treating power plant desulfurization wastewater by using nano membrane and application |
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Application publication date: 20170901 |