CN110156230A - A kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach - Google Patents
A kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach Download PDFInfo
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- CN110156230A CN110156230A CN201810256832.8A CN201810256832A CN110156230A CN 110156230 A CN110156230 A CN 110156230A CN 201810256832 A CN201810256832 A CN 201810256832A CN 110156230 A CN110156230 A CN 110156230A
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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
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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
- 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
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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
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
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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
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/19—SO4-S
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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)
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- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approaches, include the following steps: S1, circulation water pretreatment: adding softening medicament in flocculation tank and pre-processed；S2, tube microfiltration membrane filtering: the water in S1 is passed into tube microfiltration membrane；S3, osmosis filtration: the water in S2 is passed into counter-infiltration system；S4, desulfurization water pretreatment: it is passed into evaporation crystallization equipment after desulphurization system draining is pre-processed.Thermal Power Generation Industry recirculated water of the invention and method for treating desulfurized wastewater reuse water resource, and stain disease outlet has been truly realized zero-emission, while having substantially increased water utilization rate.
Description
Technical field
The present invention relates to thermoelectricity water resources to utilize technical field more particularly to a kind of Thermal Power Generation Industry high efficient utilization of water resources collection
At method.
Background technique
China's firepower unit generation amount accounts for 80% of total power generation or more, and thermal power generation is the maximum industry of China's water withdrawal
One of, the production and operation and sustainable development that electric power enterprise is directly affected whether development of water conservation.From thermal power generation row in recent years
Industry water can be seen that the increase with thermoelectricity installed capacity and generated energy, national thermal power generation station-service with regimen condition with the whole nation
Water increased, but lower with ratio of water recycle, and externally discharged waste water amount is big, and water conservation task is severe.
For entire power industry, require also to differ greatly from standard and objective situation, there are still many for water conservation
Problem.
The recycling process of water resource is unreasonable, and biggish in Thermal Power Generation Industry water consumption is recirculating cooling water system and de-
Sulphur system, part water are discharged just with 1 time, are not achieved efficiently using purpose, are caused huge waste.
During general Thermal Power Generation Industry water resource utilizes, biggish 2 units of water consumption are cooling circulating water system and desulfurization
System can consider in terms of improving the power plant water utilization of resources from the two units:
1) cooling circulating water is the maximum unit of power plant's water consumption, accounts for about 65% or more of power plant's water consumption, tradition
The processing method of circulating cooling water of power plant is other filter, weak acid sofening treatment, such method in operation must regular replenishment it is a large amount of
Water dilutes recirculated cooling water, and water waste phenomenon caused by such method is very serious；
2) water consumption of Thermal Power Generation Industry desulphurization system is also larger, and most of power plant desulfurization wastewater passes through simple process heel row
It puts, nothing is further processed and reuse facility.
Summary of the invention
Technical problems based on background technology, it is integrated that the invention proposes a kind of Thermal Power Generation Industry high efficient utilization of water resources
Method reuses water resource, and stain disease outlet has been truly realized zero-emission, while having substantially increased water utilization rate.
A kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach proposed by the present invention, includes the following steps:
S1, circulation water pretreatment: softening medicament is added in flocculation tank and is pre-processed, softens the type of medicament and adds
Amount is depending on the concrete condition of circular water treating system water quality；
S2, tube microfiltration membrane filtering: the water in S1 is passed into tube microfiltration membrane；
S3, osmosis filtration: the water in S2 is passed into counter-infiltration system；
S4, desulfurization water pretreatment: it is passed into evaporation crystallization equipment after desulphurization system draining is pre-processed.
Preferably, softening medicament in the step S1 is PAC and PAM.
Preferably, the aperture of tube microfiltration membrane is 0.1-1 μm in the step S2, and material is synthetic polymeric membrane PVDF.
Preferably, aperture reverse osmosis in counter-infiltration system in the step S3 is 1-5nm, and diaphragm material is multiple for polyamide
Close film.
Preferably, supplement water of the pure water as recirculated water after reverse osmosis in the step S3.
Preferably, the concentrated water after reverse osmosis in the step S3 supplements water as desulfurization water.
Preferably, pretreatment mode is adjusting desulfurization water pH to neutrality in the step S4, and desulfurization water is staticly settled.
Preferably, producing water in the step S4 after evaporative crystallization can be used as recirculated water.
Working principle:
1, circulating cooling system causes salt content constantly to increase due to largely evaporating, while suspended matter, hardness etc. refer to
Mark also constantly increases, and a certain amount of sewage need to periodically be discharged, this part of contaminated water is by adding softening medicament for suspended matter and hardness
Etc. indexs reduce；
2, by the pretreated water of the first step, tube microfiltration membrane is entered back into, hydrone and small point under the action of water pressure
Sub- substance etc. penetrates microfiltration membranes, and suspended particulates, the colloid etc. in water are trapped, and water outlet enters subsequent step；
3, by tube microfiltration membrane, treated that water outlet enters back into counter-infiltration system, and counter-infiltration system is by water and salinity point
From supplement water of the pure water of generation as recirculating cooling water system, concentrated water is discharged into desulphurization system supplement water.
4, desulphurization system draining adjusts by pH, enters crystal seed method evaporative crystallization facility after precipitating pretreatment facility, passes through
It produces water after evaporative crystallization to re-use as cooling circulating water supplement water, crystal salt is disposed as fixed-end forces.
Beneficial effects of the present invention:
1) Thermal Power Generation Industry recirculating cooling water system and desulphurization system sewage zero-discharge are realized, water resource fully recovering reaches
To the purpose efficiently utilized；
2) process flow is shortened using tube microfiltration membrane technique.Conventional reverse osmosis pretreating process needs multimedium mistake
The facilities such as filter, active carbon filtering, security personnel's filtering, treatment facility is more, and technique is cumbersome, and utilizes tube microfiltration membrane then instead of biography
The multistage filtering for technique of uniting, reduces process facility, and simplification of flowsheet is reduced investment outlay.
After processing method implementation compared with traditional handicraft, the utilization rate of power plant's water resource will be greatly improved, reduces water intaking
Amount saves water cost, while will also generate huge social benefit.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the functional block diagram of Thermal Power Generation Industry recirculated water and method for treating desulfurized wastewater proposed by the present invention.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
A kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach proposed by the present invention, includes the following steps:
S1, circulation water pretreatment: softening medicament is added in flocculation tank and is pre-processed；
S2, tube microfiltration membrane filtering: the water in S1 is passed into tube microfiltration membrane；
S3, osmosis filtration: the water in S2 is passed into counter-infiltration system；
S4, desulfurization water pretreatment: it is passed into evaporation crystallization equipment after desulphurization system draining is pre-processed.
Softening medicament in the step S1 is PAC and PAM.
The aperture of tube microfiltration membrane is 0.1-1 μm in the step S2, and material is synthetic polymeric membrane PVDF, microfiltration membranes fortune
Capable pressure are as follows: 0.3-7bar, surface porosity factor is 70%.
Aperture reverse osmosis in counter-infiltration system is 1-5nm in the step S3.Stablize salt rejection rate 99.5%, minimum desalination
Rate 99%, diaphragm type: polyamide composite film, 45 DEG C of maximum allowable operating temperature (M.A.O.T.).
In the step S3 it is reverse osmosis after supplement water of the pure water as recirculated water.
In the step S3 it is reverse osmosis after concentrated water as desulfurization water supplement water.
Pretreatment mode is adjusting desulfurization water pH to neutrality in the step S4, and desulfurization water is staticly settled.Adjust pH
Method be utilize complete chemicals dosing plant, by aqueous slkali by metering pump add to technique pH adjusting section, pass through stirring for blender
It mixes, is quickly uniformly mixed, reach pH and be adjusted to neutral requirement.It adjusts section water outlet and enters precipitating phase, in precipitating phase by generation
The disposition of sludge outlet.
Producing water in the step S4 after evaporative crystallization can be used as recirculated water.
Case one
Certain thermal power plant, circulating water cooling treatment water: Q=7200m3/ d, processing water water quality indicator are as follows:
After the process, all indexs reached proprietor requirement water standard (total hardness≤
150mg/L, chloride ion≤100mg/L, suspended matter≤20mg/L).
It is as follows that desulphurization system drains water quality indicator:
After being handled by recycling and zero discharge condensing crystallizing system, it is discharged after chemical water treatment system simple process, it is complete
It can satisfy the water quality demand of the normal moisturizing of recirculated cooling water entirely.Effluent quality situation see the table below:
| Serial number | Project | Unit | Content | Remarks |
| 1 | pH | 6.8~7.8 | ||
| 2 | Conductivity (25 DEG C) | μS/cm | ≤60 | Include volatility conductance |
| 3 | Ammonia nitrogen | mg/L | ≤10 | |
| 4 | Fluoride | mg/L | ≤10 | |
| 5 | Chlorion (Cl-) | mg/L | ≤50 | |
| 6 | Sulfate ion (SO4 2-) | mg/L | ≤50 | |
| 7 | Sodium ion (Na+) | mg/L | ≤50 | |
| 8 | Calcium ion (Ca2+) | mg/L | ≤50 | |
| 9 | Magnesium ion (Mg2+) | mg/L | ≤50 | |
| 10 | TDS | mg/L | ≤100 | Include volatility TDS |
| 11 | TOC | mg/L | ≤100 | Include volatility TOC |
| 12 | Total hardness | mg/L | ≤100 |
It is handled simultaneously by this system, all water resources in system are fully used, the solid salt of removal system
Lease making is dealt carefully with, and water resource has been really achieved zero-emission except evaporation, loss, no outlet.
Case two
Certain thermal power plant, circulating water cooling treatment water: Q=41110m3/ h, processing water water quality indicator are as follows:
By circular water treating system, treated that water quality is as follows:
| Analysis project | Unit | Analyze result |
| Na+ | mg/L | 21.5 |
| Ca2+ | mg/L | 1.8 |
| Mg2+ | mg/L | 1.3 |
| K+ | mg/L | 0.8 |
| Cl-Chloride | mg/L | 10.5 |
| SO4 2-Sulfate | mg/L | 6.2 |
| HCO3 - | mg/L | 26.2 |
| CO3 2- | mg/L | 0.00 |
| TDS | mg/L | 85.1 |
It is as follows that desulphurization system drains water quality indicator:
After being handled by recycling and zero discharge condensing crystallizing system, it is discharged after chemical water treatment system simple process, it is complete
It can satisfy the water quality demand of the normal moisturizing of recirculated cooling water entirely.Effluent quality situation see the table below:
| Serial number | Project | Unit | Content | Remarks |
| 1 | pH | 7.8 | ||
| 2 | SS | mg/L | 0.58 | |
| 3 | Fe | mg/L | 0.027 | |
| 4 | Chlorion (Cl-) | mg/L | 2.28 | |
| 5 | Sulfate ion (SO4 2-) | mg/L | 1.72 | |
| 6 | Calcium ion (Ca2+) | mg/L | 2.65 | |
| 7 | Magnesium ion (Mg2+) | mg/L | 0.026 | |
| 8 | TDS | mg/L | ≤25 | Include volatility TDS |
Case three
Certain thermal power plant, circulating water cooling treatment water: Q=25120m3/ h, processing water water quality indicator are as follows:
By circular water treating system, treated that water quality is as follows:
| Analysis project | Unit | Analyze result |
| Na+ | mg/L | 16.1 |
| Ca2+ | mg/L | 0.92 |
| Mg2+ | mg/L | 0.99 |
| K+ | mg/L | 0.38 |
| Cl-Chloride | mg/L | 7.53 |
| SO4 2-Sulfate | mg/L | 3.59 |
| HCO3 - | mg/L | 24.9 |
| CO3 2- | mg/L | 0.00 |
| TDS | mg/L | 65.8 |
It is as follows that desulphurization system drains water quality indicator:
| Serial number | Project | Unit | Content | Remarks |
| 1 | SS | mg/L | 30000 | |
| 2 | Chlorion (Cl-) | mg/L | 10000 | |
| 3 | Sulfate ion (SO4 2-) | mg/L | 1320 | |
| 4 | Calcium ion (Ca2+) | mg/L | 4250 | |
| 5 | Magnesium ion (Mg2+) | mg/L | 950 |
After being handled by recycling and zero discharge condensing crystallizing system, it is discharged after chemical water treatment system simple process, it is complete
It can satisfy the water quality demand of the normal moisturizing of recirculated cooling water entirely.Effluent quality situation see the table below:
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach, which comprises the steps of:
S1, circulation water pretreatment: softening medicament is added in flocculation tank and is pre-processed；
S2, tube microfiltration membrane filtering: the water in S1 is passed into tube microfiltration membrane；
S3, osmosis filtration: the water in S2 is passed into counter-infiltration system；
S4, desulfurization water pretreatment: it is passed into evaporation crystallization equipment after desulphurization system draining is pre-processed.
2. a kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach according to claim 1, which is characterized in that the step
Softening medicament is PAC and PAM in rapid S1.
3. a kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach according to claim 1, which is characterized in that the step
The aperture of tube microfiltration membrane is 0.1-1 μm in rapid S2, and material is synthetic polymeric membrane PVDF, the pressure of microfiltration membranes operation are as follows:
0.3-7bar, surface porosity factor is 70%.
4. a kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach according to claim 1, which is characterized in that the step
Aperture reverse osmosis in counter-infiltration system is 1-5nm, diaphragm type: polyamide composite film in rapid S3.
5. a kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach according to claim 1, which is characterized in that the step
In rapid S3 it is reverse osmosis after supplement water of the pure water as recirculated water.
6. a kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach according to claim 1, which is characterized in that the step
In rapid S3 it is reverse osmosis after concentrated water as desulfurization water supplement water.
7. a kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach according to claim 1, which is characterized in that the step
Pretreatment mode is adjusting desulfurization water pH to neutrality in rapid S4, and desulfurization water is staticly settled.
8. a kind of Thermal Power Generation Industry high efficient utilization of water resources integrated approach according to claim 1, which is characterized in that the step
Producing water after evaporative crystallization in rapid S4 can be used as recirculated water.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112125355A (en) * | 2020-08-26 | 2020-12-25 | 华能国际电力股份有限公司上安电厂 | Power plant water resource utilization method based on water quality classification and cascade utilization |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203922912U (en) * | 2014-01-07 | 2014-11-05 | 麦王环境技术股份有限公司 | Industry strong brine zero discharge treatment device |
| CN106045169A (en) * | 2016-07-15 | 2016-10-26 | 中国环境科学研究院 | Treatment system and method for realizing flue gas desulfurization wastewater zero discharge of coal-fired power plant |
| AU2013356476B2 (en) * | 2012-12-07 | 2016-12-22 | Aquatech International, Llc | Water treatment process |
-
2018
- 2018-03-27 CN CN201810256832.8A patent/CN110156230A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2013356476B2 (en) * | 2012-12-07 | 2016-12-22 | Aquatech International, Llc | Water treatment process |
| CN203922912U (en) * | 2014-01-07 | 2014-11-05 | 麦王环境技术股份有限公司 | Industry strong brine zero discharge treatment device |
| CN106045169A (en) * | 2016-07-15 | 2016-10-26 | 中国环境科学研究院 | Treatment system and method for realizing flue gas desulfurization wastewater zero discharge of coal-fired power plant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112125355A (en) * | 2020-08-26 | 2020-12-25 | 华能国际电力股份有限公司上安电厂 | Power plant water resource utilization method based on water quality classification and cascade utilization |
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Application publication date: 20190823 |