CN106145498A - A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method - Google Patents
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method Download PDFInfo
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- CN106145498A CN106145498A CN201610706446.5A CN201610706446A CN106145498A CN 106145498 A CN106145498 A CN 106145498A CN 201610706446 A CN201610706446 A CN 201610706446A CN 106145498 A CN106145498 A CN 106145498A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 192
- 238000002425 crystallisation Methods 0.000 claims abstract description 99
- 230000008025 crystallization Effects 0.000 claims abstract description 99
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 97
- 238000001704 evaporation Methods 0.000 claims abstract description 59
- 230000008020 evaporation Effects 0.000 claims abstract description 59
- 238000001471 micro-filtration Methods 0.000 claims abstract description 57
- 150000003839 salts Chemical class 0.000 claims abstract description 38
- 239000010802 sludge Substances 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000013078 crystal Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 239000012528 membrane Substances 0.000 claims description 34
- 239000000047 product Substances 0.000 claims description 26
- 238000010612 desalination reaction Methods 0.000 claims description 20
- 239000003245 coal Substances 0.000 claims description 10
- 239000000706 filtrate Substances 0.000 claims description 10
- 230000003020 moisturizing effect Effects 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 239000006228 supernatant Substances 0.000 claims description 10
- 239000002918 waste heat Substances 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 1
- 238000011001 backwashing Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000012141 concentrate Substances 0.000 description 17
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 15
- 239000011734 sodium Substances 0.000 description 10
- 239000000428 dust Substances 0.000 description 9
- 229910001385 heavy metal Inorganic materials 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 9
- 230000001629 suppression Effects 0.000 description 9
- 235000019504 cigarettes Nutrition 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 239000012153 distilled water Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 238000005728 strengthening Methods 0.000 description 8
- 239000011780 sodium chloride Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F1/048—Purification of waste water by 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- 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
- C02F2001/5218—Crystallization
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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Abstract
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, relates to thermal power plant's resource recycling field, comprises the steps: that (1) enters mixed reaction pond, and dosing is stirred, and adjusts pH value；(2) entering in crystallization micro-filtration, sludge cake is transported outward, and part is produced water cascade and utilized；(3) remaining product water is in reverse osmosis unit, and it produces water cascade and utilizes；(4) dense water solid-liquid separation, pure water cascade utilization, crystal salt are transported outward by low-temperature evaporation crystallization apparatus.What the present invention used adds the ion that medicine composition can preferably be removed in waste water, crystallization micro-filtration is without increasing backwashing equipment, the operation pressure that reverse osmosis unit floor space is little, can bear is big, water water quality is good, producing water ratio is high for product, low-temperature evaporation crystallization apparatus takes full advantage of the energy of thermal power plant, during filtering, it is achieved that the cascade utilization of waste water, the method achieve preferable solid-liquid separation effect, save the energy, reduced cost, it is achieved that the resource of waste water and zero-emission.
Description
Technical field
The present invention relates to thermal power plant's resource recycling field, particularly relate to the high slat-containing wastewater zero-emission of a kind of thermal power plant and put back to
Receiving processing method.
Background technology
Water scarcity is to affect the key factor that China's economic is fast-developing, as water for industrial use rich and influential family, thermal power generation
The station-service water yield and displacement are very big, and along with the increasingly stringent of national environmental protection policy, in thermal power plant, the requirement of wastewater zero discharge is the most urgent
Prompt at eyebrow.
The key of waste Water Zero Discharge for Power Plant is the process of high slat-containing wastewater.Such waste water salinity is high, it is stronger to have
Corrosivity, and containing more heavy metal, reuse approach critical constraints in factory, it becomes the primary of power plant effluent zero-emission already
Problem.
High slat-containing wastewater processes the technology path used at present is " pretreatment+wastewater minimisation+evaporative crystallization ", but is subject to
The restriction of the factors such as technological process length, operational management complexity, the easy fouling of equipment, high, the operating cost height of equipment investment, it is impossible to advise greatly
Mould popularization and application, therefore seek a kind of efficiently, the high slat-containing wastewater treatment technology of low cost, Low investment become power plant effluent zero
The task of top priority of discharge.
Summary of the invention
The shortcoming that the present invention is to solve above-mentioned prior art, it is provided that the high slat-containing wastewater zero-emission of a kind of thermal power plant is reclaimed
Processing method, the method is capable of preferable solid-liquid separation effect, it is possible to realize cascade utilization waste water, it is possible to save the energy,
Reduce cost, it is possible to realize resource and the zero-emission of waste water.
The present invention is achieved in that a kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, including walking as follows
Rapid: (1) makes thermal power plant's high slat-containing wastewater enter mixed reaction pond, and dosing stirs, and adjusts its thermal power plant's high slat-containing wastewater
PH value is between 7-8；(2) abundant reacted power plant high slat-containing wastewater is entered the dirt in crystallization micro-filtration, after filtering
After mud is processed by sludge concentration tank and sludge filter press, obtain mud cake outward transport, sludge concentration tank supernatant and sludge filter press
Produce filtrate be all back to mixed reaction pond, a part is crystallized micro-filtration produce water deliver to slag water treatment system moisturizing and
Dust suppression is sprayed in coal works；(3) being sent in reverse osmosis unit by remaining crystallization micro-filtration product water, the product water of reverse osmosis unit is used
In Boiler water Feeding System system level desalination section, the dense water of 50%-70% that reverse osmosis unit obtains enters into low-temperature evaporation crystallization
Device, in remaining concentrate recirculation to reverse osmosis unit；(4) the dense water entering into low-temperature evaporation crystallization apparatus is carried out after treatment
Solid-liquid separation, obtains pure water and crystal salt, and pure water delivers to two grades of desalination sections of boiler feed water system, and crystal salt is transported outward.
Described step (1) adds in mixed reaction pond NaOH, Ca (OH)2And C3S3N3Na3, the weight portion that adds
For: NaOH 2-4 part, Ca (OH)2 0.5-1.5 part, C3S3N3Na30.5-1.5 part.
Described reverse osmosis unit uses Tao Shi reverse osmosis membrane XUS180808, the highest operation of this reverse osmosis unit
Pressure is 120 bar, and waste water total dissolved solid content is concentrated into more than 12%.
The thermal source of described low-temperature evaporation crystallization apparatus is power plant flue gas waste heat, and the low-temperature receiver of low-temperature evaporation crystallization apparatus is
Change the demineralized water after processing between waterwheel.
Relative to prior art, the invention has the beneficial effects as follows:
The invention provides a kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, the medicine composition that adds that the method uses can
Preferably remove the ion in waste water, it is ensured that the purity of salt in waste water, the crystallization micro-filtration of employing is without increasing backwash
Equipment, the reverse osmosis unit floor space of employing is little, the operation pressure that can bear big, produce that water water quality is good, producing water ratio is high, employing
Low-temperature evaporation crystallization apparatus takes full advantage of the energy of thermal power plant, and during filtering, the product water of each step is all according to fire
Power plant's demand is utilized, it is achieved that the cascade utilization of waste water, The inventive method achieves preferable solid-liquid separation effect,
Save the energy, reduced cost, it is achieved that the resource of waste water and zero-emission.
Detailed description of the invention
Embodiment 1
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, comprises the steps: that (1) makes thermal power plant's high slat-containing wastewater
Enter mixed reaction pond, add NaOH that weight portion is 2-4 part and stir and regulate the pH value of thermal power plant's high slat-containing wastewater
Between 7-8, removing the part heavy metal ion in waste water, auxiliary adds the Ca (OH) that weight portion is 0.5-1.5 part2And weight
Part is the C of 0.5-1.5 part3S3N3Na3, remove the Hg in waste water²+、Pb²+、CO3 2-、SO4 2-、F-Plasma, it is ensured that in waste water
Salt is divided into high-purity chloro sodium.
(2) abundant reacted power plant high slat-containing wastewater is entered in crystallization micro-filtration, utilize big passage micro-filtration membrane real
Now mud-water separation, and this crystallization micro-filtration utilizes siphonage, it is not necessary to increases backwashing equipment and cleans, decreases useless
The generation again of water.According to the water demand of thermal power plant, the part of crystallization micro-filtration is produced water and is delivered to slag water treatment system moisturizing
And coal works sprinkling dust suppression, it is achieved that produce the cascade utilization of water, and crystallize the mud produced after micro-filtration filters and pass through mud
After concentration basin and sludge filter press process, obtain the filtrate that mud cake outward transport, sludge concentration tank supernatant and sludge filter press produce
All it is back to mixed reaction pond.
(3) it is sent in reverse osmosis unit carry out concentration, reverse osmosis unit by remaining crystallization micro-filtration product water
Using Tao Shi reverse osmosis membrane XUS180808, the highest operation pressure of this reverse osmosis unit is 120 bar, is dissolved by waste water
Property total solids content is concentrated into more than 12%, greatly reduces subsequent evaporation treating capacity thus reduces equipment investment.Reverse osmosis unit
Producing water and be used for Boiler water Feeding System system level desalination section, also achieve the cascade utilization producing water, reverse osmosis unit obtains
The dense water of 50%-70% enters into low-temperature evaporation crystallization apparatus, in remaining concentrate recirculation to reverse osmosis unit.Concentrate recirculation is to protect
On the premise of aquifer yield that card obtains is constant, reduces pollution to reverse osmosis membrane, reduce the cleaning frequency of reverse osmosis unit, increase
The life-span of reverse osmosis membrane.
(4) the dense water entering into low-temperature evaporation crystallization apparatus carries out solid-liquid separation after treatment, obtains pure water and crystallization
Salt, pure water delivers to two grades of desalination sections of boiler feed water system, crystal salt outward transport.The thermal source of low-temperature evaporation crystallization apparatus is power plant's cigarette
Road gas waste heat, the demineralized water after processing between low-temperature receiver the being waterwheel of low-temperature evaporation crystallization apparatus, by the natural evaporation of strengthening
The crystallization of Cheng Shixian salt, evaporates the distilled water obtained simultaneously and is back to power plant boiler makeup Water System, it is achieved that useless
The cascade utilization of water.
Embodiment 2
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, comprises the steps: that (1) makes thermal power plant's high slat-containing wastewater
Enter mixed reaction pond, add NaOH that weight portion is 2 parts stirring and regulate the pH value of thermal power plant's high slat-containing wastewater and be
Between 7-8, removing the part heavy metal ion in waste water, auxiliary adds the Ca (OH) that weight portion is 0.5 part2With weight portion it is
The C of 0.5 part3S3N3Na3, remove the Hg in waste water²+、Pb²+、CO3 2-、SO4 2-、F-Plasma, it is ensured that the salt in waste water is divided into height
Purity sodium chloride.
(2) abundant reacted power plant high slat-containing wastewater is entered in crystallization micro-filtration, utilize big passage micro-filtration membrane real
Now mud-water separation, and this crystallization micro-filtration utilizes siphonage, it is not necessary to increases backwashing equipment and cleans, decreases useless
The generation again of water.According to the water demand of thermal power plant, the part of crystallization micro-filtration is produced water and is delivered to slag water treatment system moisturizing
And coal works sprinkling dust suppression, it is achieved that produce the cascade utilization of water, and crystallize the mud produced after micro-filtration filters and pass through mud
After concentration basin and sludge filter press process, obtain the filtrate that mud cake outward transport, sludge concentration tank supernatant and sludge filter press produce
All it is back to mixed reaction pond.
(3) it is sent in reverse osmosis unit carry out concentration, reverse osmosis unit by remaining crystallization micro-filtration product water
Using Tao Shi reverse osmosis membrane XUS180808, the operation pressure of this reverse osmosis unit is 110 bar, by total for waste water dissolubility
Solids content is concentrated into 12%, greatly reduces subsequent evaporation treating capacity thus reduces equipment investment.The product water of reverse osmosis unit is used for
Boiler water Feeding System system level desalination section, also achieves the cascade utilization producing water, and the 50% dense water that reverse osmosis unit obtains enters
Enter to low-temperature evaporation crystallization apparatus, in remaining concentrate recirculation to reverse osmosis unit.Concentrate recirculation is to ensure that the product water of acquisition
Measure constant on the premise of, reduce pollution to reverse osmosis membrane, reduce the cleaning frequency of reverse osmosis unit, increase the longevity of reverse osmosis membrane
Life.
(4) the dense water entering into low-temperature evaporation crystallization apparatus carries out solid-liquid separation after treatment, obtains pure water and crystallization
Salt, pure water delivers to two grades of desalination sections of boiler feed water system, crystal salt outward transport.The thermal source of low-temperature evaporation crystallization apparatus is power plant's cigarette
Road gas waste heat, the demineralized water after processing between low-temperature receiver the being waterwheel of low-temperature evaporation crystallization apparatus, by the natural evaporation of strengthening
The crystallization of Cheng Shixian salt, evaporates the distilled water obtained simultaneously and is back to power plant boiler makeup Water System, it is achieved that useless
The cascade utilization of water.
Embodiment 3
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, comprises the steps: that (1) makes thermal power plant's high slat-containing wastewater
Enter mixed reaction pond, add NaOH that weight portion is 3 parts stirring and regulate the pH value of thermal power plant's high slat-containing wastewater and be
Between 7-8, removing the part heavy metal ion in waste water, auxiliary adds the Ca (OH) that weight portion is 1 part2It it is 1 part with weight portion
C3S3N3Na3, remove the Hg in waste water²+、Pb²+、CO3 2-、SO4 2-、F-Plasma, it is ensured that the salt in waste water is divided into high-purity
Sodium chloride.
(2) abundant reacted power plant high slat-containing wastewater is entered in crystallization micro-filtration, utilize big passage micro-filtration membrane real
Now mud-water separation, and this crystallization micro-filtration utilizes siphonage, it is not necessary to increases backwashing equipment and cleans, decreases useless
The generation again of water.According to the water demand of thermal power plant, the part of crystallization micro-filtration is produced water and is delivered to slag water treatment system moisturizing
And coal works sprinkling dust suppression, it is achieved that produce the cascade utilization of water, and crystallize the mud produced after micro-filtration filters and pass through mud
After concentration basin and sludge filter press process, obtain the filtrate that mud cake outward transport, sludge concentration tank supernatant and sludge filter press produce
All it is back to mixed reaction pond.
(3) it is sent in reverse osmosis unit carry out concentration, reverse osmosis unit by remaining crystallization micro-filtration product water
Using Tao Shi reverse osmosis membrane XUS180808, the operation pressure of this reverse osmosis unit is 115 bar, by total for waste water dissolubility
Solids content is concentrated into 13%, greatly reduces subsequent evaporation treating capacity thus reduces equipment investment.The product water of reverse osmosis unit is used for
Boiler water Feeding System system level desalination section, also achieves the cascade utilization producing water, and the 60% dense water that reverse osmosis unit obtains enters
Enter to low-temperature evaporation crystallization apparatus, in remaining concentrate recirculation to reverse osmosis unit.Concentrate recirculation is to ensure that the product water of acquisition
Measure constant on the premise of, reduce pollution to reverse osmosis membrane, reduce the cleaning frequency of reverse osmosis unit, increase the longevity of reverse osmosis membrane
Life.
(4) the dense water entering into low-temperature evaporation crystallization apparatus carries out solid-liquid separation after treatment, obtains pure water and crystallization
Salt, pure water delivers to two grades of desalination sections of boiler feed water system, crystal salt outward transport.The thermal source of low-temperature evaporation crystallization apparatus is power plant's cigarette
Road gas waste heat, the demineralized water after processing between low-temperature receiver the being waterwheel of low-temperature evaporation crystallization apparatus, by the natural evaporation of strengthening
The crystallization of Cheng Shixian salt, evaporates the distilled water obtained simultaneously and is back to power plant boiler makeup Water System, it is achieved that useless
The cascade utilization of water.
Embodiment 4
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, comprises the steps: that (1) makes thermal power plant's high slat-containing wastewater
Enter mixed reaction pond, add NaOH that weight portion is 4 parts stirring and regulate the pH value of thermal power plant's high slat-containing wastewater and be
Between 7-8, removing the part heavy metal ion in waste water, auxiliary adds the Ca (OH) that weight portion is 1.5 parts2With weight portion it is
The C of 1.5 parts3S3N3Na3, remove the Hg in waste water²+、Pb²+、CO3 2-、SO4 2-、F-Plasma, it is ensured that the salt in waste water is divided into height
Purity sodium chloride.
(2) abundant reacted power plant high slat-containing wastewater is entered in crystallization micro-filtration, utilize big passage micro-filtration membrane real
Now mud-water separation, and this crystallization micro-filtration utilizes siphonage, it is not necessary to increases backwashing equipment and cleans, decreases useless
The generation again of water.According to the water demand of thermal power plant, the part of crystallization micro-filtration is produced water and is delivered to slag water treatment system moisturizing
And coal works sprinkling dust suppression, it is achieved that produce the cascade utilization of water, and crystallize the mud produced after micro-filtration filters and pass through mud
After concentration basin and sludge filter press process, obtain the filtrate that mud cake outward transport, sludge concentration tank supernatant and sludge filter press produce
All it is back to mixed reaction pond.
(3) it is sent in reverse osmosis unit carry out concentration, reverse osmosis unit by remaining crystallization micro-filtration product water
Using Tao Shi reverse osmosis membrane XUS180808, the operation pressure of this reverse osmosis unit is 120 bar, by total for waste water dissolubility
Solids content is concentrated into 14%, greatly reduces subsequent evaporation treating capacity thus reduces equipment investment.The product water of reverse osmosis unit is used for
Boiler water Feeding System system level desalination section, also achieves the cascade utilization producing water, and the 70% dense water that reverse osmosis unit obtains enters
Enter to low-temperature evaporation crystallization apparatus, in remaining concentrate recirculation to reverse osmosis unit.Concentrate recirculation is to ensure that the product water of acquisition
Measure constant on the premise of, reduce pollution to reverse osmosis membrane, reduce the cleaning frequency of reverse osmosis unit, increase the longevity of reverse osmosis membrane
Life.
(4) the dense water entering into low-temperature evaporation crystallization apparatus carries out solid-liquid separation after treatment, obtains pure water and crystallization
Salt, pure water delivers to two grades of desalination sections of boiler feed water system, crystal salt outward transport.The thermal source of low-temperature evaporation crystallization apparatus is power plant's cigarette
Road gas waste heat, the demineralized water after processing between low-temperature receiver the being waterwheel of low-temperature evaporation crystallization apparatus, by the natural evaporation of strengthening
The crystallization of Cheng Shixian salt, evaporates the distilled water obtained simultaneously and is back to power plant boiler makeup Water System, it is achieved that useless
The cascade utilization of water.
Embodiment 5
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, comprises the steps: that (1) makes thermal power plant's high slat-containing wastewater
Enter mixed reaction pond, add NaOH that weight portion is 3 parts stirring and regulate the pH value of thermal power plant's high slat-containing wastewater and be
Between 7-8, removing the part heavy metal ion in waste water, auxiliary adds the Ca (OH) that weight portion is 1.5 parts2With weight portion it is
The C of 1.5 parts3S3N3Na3, remove the Hg in waste water²+、Pb²+、CO3 2-、SO4 2-、F-Plasma, it is ensured that the salt in waste water is divided into height
Purity sodium chloride.
(2) abundant reacted power plant high slat-containing wastewater is entered in crystallization micro-filtration, utilize big passage micro-filtration membrane real
Now mud-water separation, and this crystallization micro-filtration utilizes siphonage, it is not necessary to increases backwashing equipment and cleans, decreases useless
The generation again of water.According to the water demand of thermal power plant, the part of crystallization micro-filtration is produced water and is delivered to slag water treatment system moisturizing
And coal works sprinkling dust suppression, it is achieved that produce the cascade utilization of water, and crystallize the mud produced after micro-filtration filters and pass through mud
After concentration basin and sludge filter press process, obtain the filtrate that mud cake outward transport, sludge concentration tank supernatant and sludge filter press produce
All it is back to mixed reaction pond.
(3) it is sent in reverse osmosis unit carry out concentration, reverse osmosis unit by remaining crystallization micro-filtration product water
Using Tao Shi reverse osmosis membrane XUS180808, the operation pressure of this reverse osmosis unit is 115 bar, by total for waste water dissolubility
Solids content is concentrated into 13%, greatly reduces subsequent evaporation treating capacity thus reduces equipment investment.The product water of reverse osmosis unit is used for
Boiler water Feeding System system level desalination section, also achieves the cascade utilization producing water, and the 65% dense water that reverse osmosis unit obtains enters
Enter to low-temperature evaporation crystallization apparatus, in remaining concentrate recirculation to reverse osmosis unit.Concentrate recirculation is to ensure that the product water of acquisition
Measure constant on the premise of, reduce pollution to reverse osmosis membrane, reduce the cleaning frequency of reverse osmosis unit, increase the longevity of reverse osmosis membrane
Life.
(4) the dense water entering into low-temperature evaporation crystallization apparatus carries out solid-liquid separation after treatment, obtains pure water and crystallization
Salt, pure water delivers to two grades of desalination sections of boiler feed water system, crystal salt outward transport.The thermal source of low-temperature evaporation crystallization apparatus is power plant's cigarette
Road gas waste heat, the demineralized water after processing between low-temperature receiver the being waterwheel of low-temperature evaporation crystallization apparatus, by the natural evaporation of strengthening
The crystallization of Cheng Shixian salt, evaporates the distilled water obtained simultaneously and is back to power plant boiler makeup Water System, it is achieved that useless
The cascade utilization of water.
Embodiment 6
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, comprises the steps: that (1) makes thermal power plant's high slat-containing wastewater
Enter mixed reaction pond, add NaOH that weight portion is 4 parts stirring and regulate the pH value of thermal power plant's high slat-containing wastewater and be
Between 7-8, removing the part heavy metal ion in waste water, auxiliary adds the Ca (OH) that weight portion is 1 part2It it is 1 part with weight portion
C3S3N3Na3, remove the Hg in waste water²+、Pb²+、CO3 2-、SO4 2-、F-Plasma, it is ensured that the salt in waste water is divided into high-purity
Sodium chloride.
(2) abundant reacted power plant high slat-containing wastewater is entered in crystallization micro-filtration, utilize big passage micro-filtration membrane real
Now mud-water separation, and this crystallization micro-filtration utilizes siphonage, it is not necessary to increases backwashing equipment and cleans, decreases useless
The generation again of water.According to the water demand of thermal power plant, the part of crystallization micro-filtration is produced water and is delivered to slag water treatment system moisturizing
And coal works sprinkling dust suppression, it is achieved that produce the cascade utilization of water, and crystallize the mud produced after micro-filtration filters and pass through mud
After concentration basin and sludge filter press process, obtain the filtrate that mud cake outward transport, sludge concentration tank supernatant and sludge filter press produce
All it is back to mixed reaction pond.
(3) it is sent in reverse osmosis unit carry out concentration, reverse osmosis unit by remaining crystallization micro-filtration product water
Using Tao Shi reverse osmosis membrane XUS180808, the operation pressure of this reverse osmosis unit is 120 bar, by total for waste water dissolubility
Solids content is concentrated into 14%, greatly reduces subsequent evaporation treating capacity thus reduces equipment investment.The product water of reverse osmosis unit is used for
Boiler water Feeding System system level desalination section, also achieves the cascade utilization producing water, and the 60% dense water that reverse osmosis unit obtains enters
Enter to low-temperature evaporation crystallization apparatus, in remaining concentrate recirculation to reverse osmosis unit.Concentrate recirculation is to ensure that the product water of acquisition
Measure constant on the premise of, reduce pollution to reverse osmosis membrane, reduce the cleaning frequency of reverse osmosis unit, increase the longevity of reverse osmosis membrane
Life.
(4) the dense water entering into low-temperature evaporation crystallization apparatus carries out solid-liquid separation after treatment, obtains pure water and crystallization
Salt, pure water delivers to two grades of desalination sections of boiler feed water system, crystal salt outward transport.The thermal source of low-temperature evaporation crystallization apparatus is power plant's cigarette
Road gas waste heat, the demineralized water after processing between low-temperature receiver the being waterwheel of low-temperature evaporation crystallization apparatus, by the natural evaporation of strengthening
The crystallization of Cheng Shixian salt, evaporates the distilled water obtained simultaneously and is back to power plant boiler makeup Water System, it is achieved that useless
The cascade utilization of water.
Embodiment 7
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, comprises the steps: that (1) makes thermal power plant's high slat-containing wastewater
Enter mixed reaction pond, add NaOH that weight portion is 3 parts stirring and regulate the pH value of thermal power plant's high slat-containing wastewater and be
Between 7-8, removing the part heavy metal ion in waste water, auxiliary adds the Ca (OH) that weight portion is 0.5 part2With weight portion it is
The C of 0.5 part3S3N3Na3, remove the Hg in waste water²+、Pb²+、CO3 2-、SO4 2-、F-Plasma, it is ensured that the salt in waste water is divided into height
Purity sodium chloride.
(2) abundant reacted power plant high slat-containing wastewater is entered in crystallization micro-filtration, utilize big passage micro-filtration membrane real
Now mud-water separation, and this crystallization micro-filtration utilizes siphonage, it is not necessary to increases backwashing equipment and cleans, decreases useless
The generation again of water.According to the water demand of thermal power plant, the part of crystallization micro-filtration is produced water and is delivered to slag water treatment system moisturizing
And coal works sprinkling dust suppression, it is achieved that produce the cascade utilization of water, and crystallize the mud produced after micro-filtration filters and pass through mud
After concentration basin and sludge filter press process, obtain the filtrate that mud cake outward transport, sludge concentration tank supernatant and sludge filter press produce
All it is back to mixed reaction pond.
(3) it is sent in reverse osmosis unit carry out concentration, reverse osmosis unit by remaining crystallization micro-filtration product water
Using Tao Shi reverse osmosis membrane XUS180808, the operation pressure of this reverse osmosis unit is 110bar, and waste water dissolubility is always solid
Body burden is concentrated into 12%, greatly reduces subsequent evaporation treating capacity thus reduces equipment investment.The product water of reverse osmosis unit is used for pot
Stove make up water treatment system level desalination section, also achieves the cascade utilization producing water, and the 50% dense water that reverse osmosis unit obtains enters
To low-temperature evaporation crystallization apparatus, in remaining concentrate recirculation to reverse osmosis unit.Concentrate recirculation is to ensure that the aquifer yield of acquisition
On the premise of constant, reduce the pollution to reverse osmosis membrane, reduce the cleaning frequency of reverse osmosis unit, increase the longevity of reverse osmosis membrane
Life.
(4) the dense water entering into low-temperature evaporation crystallization apparatus carries out solid-liquid separation after treatment, obtains pure water and crystallization
Salt, pure water delivers to two grades of desalination sections of boiler feed water system, crystal salt outward transport.The thermal source of low-temperature evaporation crystallization apparatus is power plant's cigarette
Road gas waste heat, the demineralized water after processing between low-temperature receiver the being waterwheel of low-temperature evaporation crystallization apparatus, by the natural evaporation of strengthening
The crystallization of Cheng Shixian salt, evaporates the distilled water obtained simultaneously and is back to power plant boiler makeup Water System, it is achieved that useless
The cascade utilization of water.
Embodiment 8
A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method, comprises the steps: that (1) makes thermal power plant's high slat-containing wastewater
Enter mixed reaction pond, add NaOH that weight portion is 2 parts stirring and regulate the pH value of thermal power plant's high slat-containing wastewater and be
Between 7-8, removing the part heavy metal ion in waste water, auxiliary adds the Ca (OH) that weight portion is 1 part2It it is 1 part with weight portion
C3S3N3Na3, remove the Hg in waste water²+、Pb²+、CO3 2-、SO4 2-、F-Plasma, it is ensured that the salt in waste water is divided into high-purity
Sodium chloride.
(2) abundant reacted power plant high slat-containing wastewater is entered in crystallization micro-filtration, utilize big passage micro-filtration membrane real
Now mud-water separation, and this crystallization micro-filtration utilizes siphonage, it is not necessary to increases backwashing equipment and cleans, decreases useless
The generation again of water.According to the water demand of thermal power plant, the part of crystallization micro-filtration is produced water and is delivered to slag water treatment system moisturizing
And coal works sprinkling dust suppression, it is achieved that produce the cascade utilization of water, and crystallize the mud produced after micro-filtration filters and pass through mud
After concentration basin and sludge filter press process, obtain the filtrate that mud cake outward transport, sludge concentration tank supernatant and sludge filter press produce
All it is back to mixed reaction pond.
(3) it is sent in reverse osmosis unit carry out concentration, reverse osmosis unit by remaining crystallization micro-filtration product water
Using Tao Shi reverse osmosis membrane XUS180808, the operation pressure of this reverse osmosis unit is 115 bar, by total for waste water dissolubility
Solids content is concentrated into 13%, greatly reduces subsequent evaporation treating capacity thus reduces equipment investment.The product water of reverse osmosis unit is used for
Boiler water Feeding System system level desalination section, also achieves the cascade utilization producing water, and the 70% dense water that reverse osmosis unit obtains enters
Enter to low-temperature evaporation crystallization apparatus, in remaining concentrate recirculation to reverse osmosis unit.Concentrate recirculation is to ensure that the product water of acquisition
Measure constant on the premise of, reduce pollution to reverse osmosis membrane, reduce the cleaning frequency of reverse osmosis unit, increase the longevity of reverse osmosis membrane
Life.
(4) the dense water entering into low-temperature evaporation crystallization apparatus carries out solid-liquid separation after treatment, obtains pure water and crystallization
Salt, pure water delivers to two grades of desalination sections of boiler feed water system, crystal salt outward transport.The thermal source of low-temperature evaporation crystallization apparatus is power plant's cigarette
Road gas waste heat, the demineralized water after processing between low-temperature receiver the being waterwheel of low-temperature evaporation crystallization apparatus, by the natural evaporation of strengthening
The crystallization of Cheng Shixian salt, evaporates the distilled water obtained simultaneously and is back to power plant boiler makeup Water System, it is achieved that useless
The cascade utilization of water.
Embodiment described above, the simply one of the present invention more preferably detailed description of the invention, those skilled in the art
The usual variations and alternatives that member is carried out in the range of technical solution of the present invention are intended to be included in protection scope of the present invention.
Claims (4)
1. thermal power plant's high slat-containing wastewater zero-emission recovery and treatment method, it is characterised in that: comprise the steps: that (1) makes fire
Power plant high slat-containing wastewater enters mixed reaction pond, and dosing stirs, adjust the pH value of its thermal power plant's high slat-containing wastewater be 7-8 it
Between；(2) being entered by abundant reacted power plant high slat-containing wastewater in crystallization micro-filtration, the mud after filtering is dense by mud
After contracting pond and sludge filter press process, obtaining mud cake outward transport, the filtrate of sludge concentration tank supernatant and sludge filter press generation is equal
It is back to mixed reaction pond, a part is crystallized micro-filtration and produces water and deliver to slag water treatment system moisturizing and coal works and spray and press down
Dirt；(3) being sent in reverse osmosis unit by remaining crystallization micro-filtration product water, the product water of reverse osmosis unit feeds for boiler
Water treatment system one-level desalination section, the dense water of 50%-70% that reverse osmosis unit obtains enters into low-temperature evaporation crystallization apparatus, and remaining is dense
Water is back in reverse osmosis unit；(4) the dense water entering into low-temperature evaporation crystallization apparatus carries out solid-liquid separation after treatment,
To pure water and crystal salt, pure water delivers to two grades of desalination sections of boiler feed water system, and crystal salt is transported outward.
Thermal power plant the most according to claim 1 high slat-containing wastewater zero-emission recovery and treatment method, it is characterised in that: described
Step (1) adds in mixed reaction pond NaOH, Ca (OH)2And C3S3N3Na3, the weight portion added is: NaOH 2-4 part, Ca
(OH)2 0.5-1.5 part, C3S3N3Na30.5-1.5 part.
Thermal power plant the most according to claim 1 high slat-containing wastewater zero-emission recovery and treatment method, it is characterised in that: described
Reverse osmosis unit uses Tao Shi reverse osmosis membrane XUS180808, and the highest operation pressure of this reverse osmosis unit is 120 bar,
Waste water total dissolved solid content is concentrated into more than 12%.
Thermal power plant the most according to claim 1 high slat-containing wastewater zero-emission recovery and treatment method, it is characterised in that: described
The thermal source of low-temperature evaporation crystallization apparatus is power plant flue gas waste heat, after the low-temperature receiver of low-temperature evaporation crystallization apparatus is for processing between change waterwheel
Demineralized water.
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| CN111649615A (en) * | 2020-05-29 | 2020-09-11 | 鞍钢股份有限公司 | The method of determining the leakage rate of the circulating system by the concentration ratio when there is impurity removal |
| CN111663604A (en) * | 2020-05-29 | 2020-09-15 | 鞍钢股份有限公司 | Method for determining pollution discharge rate of circulating water cooling system through concentration ratio |
| CN111664634A (en) * | 2020-05-29 | 2020-09-15 | 鞍钢股份有限公司 | Method for determining circulation system pollution discharge rate through concentration ratio when impurities are removed |
| CN111664633A (en) * | 2020-05-29 | 2020-09-15 | 鞍钢股份有限公司 | Method for determining leakage rate of circulating water cooling system through concentration ratio |
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