CN114394695A - Treatment method for recycling domestic sewage of thermal power plant to circulating cooling water system - Google Patents
Treatment method for recycling domestic sewage of thermal power plant to circulating cooling water system Download PDFInfo
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- CN114394695A CN114394695A CN202210083254.9A CN202210083254A CN114394695A CN 114394695 A CN114394695 A CN 114394695A CN 202210083254 A CN202210083254 A CN 202210083254A CN 114394695 A CN114394695 A CN 114394695A
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- 239000010865 sewage Substances 0.000 title claims abstract description 188
- 239000000498 cooling water Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000004064 recycling Methods 0.000 title claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 117
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 44
- 238000005189 flocculation Methods 0.000 claims abstract description 39
- 230000016615 flocculation Effects 0.000 claims abstract description 36
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 35
- 238000001556 precipitation Methods 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims description 44
- 238000001514 detection method Methods 0.000 claims description 21
- 239000000835 fiber Substances 0.000 claims description 20
- 238000006386 neutralization reaction Methods 0.000 claims description 18
- 239000012528 membrane Substances 0.000 claims description 15
- 230000003311 flocculating effect Effects 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 12
- 239000000470 constituent Substances 0.000 claims description 9
- 238000004062 sedimentation Methods 0.000 claims description 9
- 239000000084 colloidal system Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 239000010840 domestic wastewater Substances 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 231100000719 pollutant Toxicity 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 241000894006 Bacteria Species 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000000701 coagulant Substances 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 244000005700 microbiome Species 0.000 claims description 4
- 230000003204 osmotic effect Effects 0.000 claims description 4
- 239000012466 permeate Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 2
- 238000012372 quality testing Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000013589 supplement Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000010842 industrial wastewater Substances 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000002198 insoluble material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000000047 product Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
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- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- C02F1/44—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
-
- 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
-
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
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- 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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a treatment method for reusing domestic sewage of a thermal power plant in a circulating cooling water system, which comprises the following steps: the precipitation of thermal power plant domestic sewage filters, adjust, flocculation, high efficiency filter, reverse osmosis, water quality testing and pH value adjust, thereby accomplish the processing to the domestic sewage of hydraulic power plant, the treatment effect is very good, make it can the reuse in recirculated cooling water system, water economy resource, avoid simply handling the pollution that direct discharge caused the environment, set up a super filter in water quality testing department, ensure that the unqualified water of water quality testing can carry out repeated ultrafiltration and the prevention of seepage and pass through the processing, with the water quality of water after guaranteeing to handle better, make it can the reuse in recirculated cooling water system, greatly increased domestic sewage's rate of reuse.
Description
Technical Field
The invention relates to the field of domestic sewage treatment of a thermal power plant, in particular to a treatment method for reusing domestic sewage of the thermal power plant in a circulating cooling water system.
Background
The contradiction between the supply and demand of water resources of the thermal power plant in China is very prominent, the sewage discharge of the thermal power plant is reduced, the sewage treatment level is improved, and the reuse rate of the water resources is increased, so that the important measures for ensuring the environment and improving the productivity are taken. The treatment and the recycling of the domestic sewage are one of important ways for effectively relieving the water resource shortage of the thermal power plant.
At present, the domestic sewage treatment technology of the thermal power plant mainly comprises physical treatment technology, grating, sedimentation tank and the like, chemical treatment technology, coagulation and the like, biological treatment technology, biological filter, contact oxidation and the like, and the combination of the industrial technologies and the like. Wherein the biological treatment technology has the advantages of strong purification capability, low cost, good operation reliability and the like, and is a main method for treating domestic sewage.
The waste water of the thermal power plant comprises two parts of industrial waste water and domestic sewage, wherein the industrial waste water mainly comprises cooling water sewage discharge and overflow water, transfer machine cooling water, sampling frame cooling water, air cooler and oil cooler cooling water and the like, and the industrial waste water and the domestic sewage are mainly treated and recycled as water supplement of circulating cooling water and directly enter a cooling tower of the thermal power plant for recycling.
The existing domestic sewage treatment effect of the thermal power plant is not good, the reuse rate is low, most of domestic sewage is discharged after being simply treated, the waste of water resources is caused, and the environmental pollution is also caused.
Disclosure of Invention
The invention aims to provide a method for treating domestic sewage of a thermal power plant for recycling in a circulating cooling water system, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a treatment method for reusing domestic sewage of a thermal power plant in a circulating cooling water system comprises the following steps:
the method comprises the following steps: precipitating and filtering domestic sewage of a thermal power plant;
step two: adjusting domestic sewage of a thermal power plant;
step three: flocculation of domestic sewage of a thermal power plant;
step four: high-efficiency filtration of domestic sewage of a thermal power plant;
step five: reverse osmosis of domestic sewage of a thermal power plant;
step six: detecting the quality of domestic sewage of a thermal power plant;
step seven: adjusting the pH value of domestic sewage of the thermal power plant.
As a further scheme of the invention: the domestic sewage of the thermal power plant is pumped into a precipitation filtering tank by a sewage lift pump, the preliminary precipitation filtering of the domestic sewage of the thermal power plant is completed, the sewage after the precipitation filtering is sent into an adjusting tank, the adjustment of the water quality and the water quantity is completed, the water quality and the water quantity of the domestic sewage are adjusted by the adjusting tank and then sent into a flocculating tank, a flocculating agent is added into the flocculating tank to realize the flocculation of the domestic sewage, flocculating constituents are formed in the domestic sewage, the flocculation is completed, the flocculated domestic sewage passes through a high-efficiency fiber filter, the high-efficiency filtering of the domestic sewage is realized, the domestic sewage is separated from the flocculating constituents to remove larger particle pollutants in the domestic sewage, the domestic sewage after the high-efficiency filtering is sent into a reverse osmosis tank to perform reverse osmosis treatment, the domestic sewage after the reverse osmosis treatment is subjected to water body detection by a water quality detector, and the qualified water body after the water body detection is sent into a final neutralization tank, and finally, detecting the pH value of the water body in the neutralization tank, adding acid or alkali into the neutralization tank according to the pH detection result, and adjusting the pH value to facilitate the application of the water body in the circulating cooling water system.
As a further scheme of the invention: the sedimentation filter tank is internally divided into an upper layer, a middle layer and a lower layer, each layer is provided with a filter screen with different pores, and the pores of the filter screens are sequentially reduced from high to low, so that the domestic sewage of the thermal power plant is gradually precipitated and filtered, and the sedimentation filter effect of the domestic sewage of the thermal power plant is effectively ensured.
As a further scheme of the invention: the regulating tank is large in volume, and the problem that the quality of domestic sewage water is high, the fluctuation of the water quantity is large, and the influence on the dehydration rate of the domestic sewage water production is avoided.
As a further scheme of the invention: the flocculation tank is added with a coagulant aid in the flocculation process so as to accelerate the formation of floccules in the wastewater.
As a further scheme of the invention: the reverse osmosis treatment is to separate the solute from the solvent in the domestic sewage by means of selective interception of a semipermeable membrane which allows only water to permeate but not other substances under the action of pressure higher than the osmotic pressure of the domestic sewage.
As a further scheme of the invention: by utilizing the separation characteristic of the reverse osmosis treatment, dissolved salts, colloids, organic matters, bacteria and microorganism impurities in domestic sewage can be effectively removed.
As a further scheme of the invention: and the water body which is not detected by the water quality detector is sent into an ultrafiltration tank for ultrafiltration treatment, an ultrafiltration membrane is arranged in the ultrafiltration tank, and the pore size of the ultrafiltration membrane is 0.1-0.2 mu m.
As a further scheme of the invention: through the water after the ultrafiltration treatment in the ultrafiltration pond is sent into the reverse osmosis pond again, accomplishes reverse osmosis treatment once more to ensure that the water detects qualifiedly, insoluble material in the domestic sewage can be got rid of to the ultrafiltration treatment in the ultrafiltration pond, reduces the pollution risk of particulate matter, and the ultrafiltration treatment can avoid being contaminated stifled by the colloid in the reverse osmosis treatment process.
As a still further scheme of the invention: the pH value of the water supplement of the circulating cooling water applied in the circulating cooling water system is 6.5-9.5.
Compared with the prior art, the invention has the beneficial effects that:
1. through the precipitation filtration, regulation, flocculation, high efficiency filtration, reverse osmosis, water quality testing and pH value to thermal power plant domestic sewage adjust to the completion is to the processing of hydraulic power plant domestic sewage, and the treatment effect is very good, makes it can reuse in circulating cooling water system, and the water economy resource avoids simply handling the pollution that direct discharge caused the environment.
2. The super filter is arranged at the water quality detection position, so that the water body with unqualified water quality detection can be subjected to repeated ultrafiltration and anti-seepage treatment, the water quality of the treated water body is better, the treated water body can be reused in a circulating cooling water system, and the reuse rate of domestic sewage is greatly increased.
Drawings
FIG. 1 is a flow chart of a treatment method for reusing domestic sewage of a thermal power plant in a circulating cooling water system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, a method for treating domestic sewage of a thermal power plant for recycling in a circulating cooling water system includes the following steps:
the method comprises the following steps: precipitation and filtration of domestic sewage of a thermal power plant: the domestic sewage of the thermal power plant is pumped into a precipitation filtering tank by a sewage lifting pump, so that the preliminary precipitation filtering of the domestic sewage of the thermal power plant is completed;
step two: adjusting domestic sewage of a thermal power plant: the sewage after precipitation and filtration is sent into an adjusting tank to finish the adjustment of water quality and water quantity;
step three: flocculation of domestic sewage of thermal power plants: after the water quality and the water quantity of the domestic sewage are adjusted by the adjusting tank, the domestic sewage is sent into a flocculation tank, a flocculating agent is added into the flocculation tank to realize the flocculation of the domestic sewage, and a flocculating constituent is formed in the domestic sewage to finish the flocculation;
step four: reverse osmosis of domestic sewage of a thermal power plant: the flocculated domestic sewage is sent into a reverse osmosis pool for reverse osmosis treatment;
step five: the water quality detection of domestic sewage of the thermal power plant: carrying out water body detection on the domestic wastewater subjected to reverse osmosis treatment by using a water quality detector, and sending the qualified water body to a final neutralization pond;
step six: adjusting the pH value of domestic sewage of a thermal power plant: and finally, detecting the pH value of the water body in the neutralization tank, adding acid or alkali into the neutralization tank according to the pH detection result, and adjusting the pH value to facilitate the application of the water body in the circulating cooling water system.
Example two
A treatment method for reusing domestic sewage of a thermal power plant in a circulating cooling water system comprises the following steps:
the method comprises the following steps: precipitation and filtration of domestic sewage of a thermal power plant: the domestic sewage of the thermal power plant is pumped into a precipitation filtering tank by a sewage lifting pump, so that the preliminary precipitation filtering of the domestic sewage of the thermal power plant is completed;
step two: adjusting domestic sewage of a thermal power plant: the sewage after precipitation and filtration is sent into an adjusting tank to finish the adjustment of water quality and water quantity;
step three: flocculation of domestic sewage of thermal power plants: after the water quality and the water quantity of the domestic sewage are adjusted by the adjusting tank, the domestic sewage is sent into a flocculation tank, a flocculating agent is added into the flocculation tank to realize the flocculation of the domestic sewage, and a flocculating constituent is formed in the domestic sewage to finish the flocculation;
step four: efficient filtration of domestic sewage of a thermal power plant: the flocculated domestic sewage passes through a high-efficiency fiber filter, so that the domestic sewage is efficiently filtered, the domestic sewage is separated from a flocculating body, and larger particle pollutants in the domestic sewage are removed;
step five: reverse osmosis of domestic sewage of a thermal power plant: the domestic sewage after high-efficiency filtration is sent into a reverse osmosis pool for reverse osmosis treatment;
step six: the water quality detection of domestic sewage of the thermal power plant: carrying out water body detection on the domestic wastewater subjected to reverse osmosis treatment by using a water quality detector, and sending the qualified water body to a final neutralization pond;
step seven: adjusting the pH value of domestic sewage of a thermal power plant: and finally, detecting the pH value of the water body in the neutralization tank, adding acid or alkali into the neutralization tank according to the pH detection result, and adjusting the pH value to facilitate the application of the water body in the circulating cooling water system.
The difference between the second embodiment and the first embodiment is that in the fourth embodiment, the flocculating constituent in the domestic sewage is removed through the high-efficiency fiber filter, so that the subsequent domestic sewage treatment is based and a better treatment effect can be achieved.
The efficient fiber filter is pressure type fiber filtering equipment with excellent performance and advanced structure, the efficient fiber filter is free of wearing parts, the operation is simple, the adjustment of the fiber density is skillfully adjusted through a special device inside the equipment through water power, a fiber bundle filter material fixing and movable connecting traction device is arranged inside the efficient fiber filter fitting, the efficient fiber filter fitting has the effect that the fiber bundle filter material can be uniformly compressed when the efficient fiber filter fitting operates, and the fiber bundle filter material can be fully stretched to reach a free state during cleaning, so that the fiber bundle filter material can be thoroughly cleaned. The high-efficiency fiber filter solves various problems in the cleaning process, and the filtering precision of granular filter materials such as quartz sand and the like is limited by the particle size of the filter materials, so that the high-efficiency fiber filter is a better new-generation product of the granular filter material filter such as quartz sand and the like. The high-efficiency fiber filter is an indispensable auxiliary element in various pipeline systems, and mainly has the functions of filtering impurities in a medium, protecting equipment and fittings on a pipeline from abrasion, blockage and the like, improving the product purity, purifying gas and the like.
EXAMPLE III
A treatment method for reusing domestic sewage of a thermal power plant in a circulating cooling water system comprises the following steps:
the method comprises the following steps: precipitation and filtration of domestic sewage of a thermal power plant: the domestic sewage of the thermal power plant is pumped into a precipitation filtering tank by a sewage lifting pump, so that the preliminary precipitation filtering of the domestic sewage of the thermal power plant is completed;
step two: adjusting domestic sewage of a thermal power plant: the sewage after precipitation and filtration is sent into an adjusting tank to finish the adjustment of water quality and water quantity;
step three: flocculation of domestic sewage of thermal power plants: after the water quality and the water quantity of the domestic sewage are adjusted by the adjusting tank, the domestic sewage is sent into a flocculation tank, a flocculating agent is added into the flocculation tank to realize the flocculation of the domestic sewage, and a flocculating constituent is formed in the domestic sewage to finish the flocculation;
step four: efficient filtration of domestic sewage of a thermal power plant: the flocculated domestic sewage passes through a high-efficiency fiber filter, so that the domestic sewage is efficiently filtered, the domestic sewage is separated from a flocculating body, and larger particle pollutants in the domestic sewage are removed;
step five: reverse osmosis of domestic sewage of a thermal power plant: the domestic sewage after high-efficiency filtration is sent into a reverse osmosis pool for reverse osmosis treatment;
step six: the water quality detection of domestic sewage of the thermal power plant: carrying out water body detection on the domestic wastewater subjected to reverse osmosis treatment by using a water quality detector, and sending the qualified water body to a final neutralization pond;
step seven: adjusting the pH value of domestic sewage of a thermal power plant: and finally, detecting the pH value of the water body in the neutralization tank, adding acid or alkali into the neutralization tank according to the pH detection result, and adjusting the pH value to facilitate the application of the water body in the circulating cooling water system.
Preferably: the sedimentation filter tank is internally divided into an upper layer, a middle layer and a lower layer, each layer is provided with a filter screen with different pores, and the pores of the filter screens are sequentially reduced from high to low, so that the domestic sewage of the thermal power plant is gradually precipitated and filtered, and the sedimentation filter effect of the domestic sewage of the thermal power plant is effectively ensured.
Preferably: the regulating tank is large in volume, and the problem that the quality of domestic sewage water is high, the fluctuation of the water quantity is large, and the influence on the dehydration rate of the domestic sewage water production is avoided.
Preferably: the flocculation tank is added with a coagulant aid in the flocculation process so as to accelerate the formation of floccules in the wastewater.
Preferably: the reverse osmosis treatment is to separate the solute from the solvent in the domestic sewage by means of selective interception of a semipermeable membrane which allows only water to permeate but not other substances under the action of pressure higher than the osmotic pressure of the domestic sewage.
Preferably: by utilizing the separation characteristic of the reverse osmosis treatment, dissolved salts, colloids, organic matters, bacteria and microorganism impurities in domestic sewage can be effectively removed.
Preferably: the pH value of the water supplement of the circulating cooling water applied in the circulating cooling water system is 6.5-9.5.
Through the precipitation filtration, regulation, flocculation, high efficiency filtration, reverse osmosis, water quality testing and pH value to thermal power plant domestic sewage adjust to the completion is to the processing of hydraulic power plant domestic sewage, and the treatment effect is very good, makes it can reuse in circulating cooling water system, and the water economy resource avoids simply handling the pollution that direct discharge caused the environment.
Example four
A treatment method for reusing domestic sewage of a thermal power plant in a circulating cooling water system comprises the following steps:
the method comprises the following steps: precipitation and filtration of domestic sewage of a thermal power plant: the domestic sewage of the thermal power plant is pumped into a precipitation filtering tank by a sewage lifting pump, so that the preliminary precipitation filtering of the domestic sewage of the thermal power plant is completed;
step two: adjusting domestic sewage of a thermal power plant: the sewage after precipitation and filtration is sent into an adjusting tank to finish the adjustment of water quality and water quantity;
step three: flocculation of domestic sewage of thermal power plants: after the water quality and the water quantity of the domestic sewage are adjusted by the adjusting tank, the domestic sewage is sent into a flocculation tank, a flocculating agent is added into the flocculation tank to realize the flocculation of the domestic sewage, and a flocculating constituent is formed in the domestic sewage to finish the flocculation;
step four: efficient filtration of domestic sewage of a thermal power plant: the flocculated domestic sewage passes through a high-efficiency fiber filter, so that the domestic sewage is efficiently filtered, the domestic sewage is separated from a flocculating body, and larger particle pollutants in the domestic sewage are removed;
step five: reverse osmosis of domestic sewage of a thermal power plant: the domestic sewage after high-efficiency filtration is sent into a reverse osmosis pool for reverse osmosis treatment;
step six: the water quality detection of domestic sewage of the thermal power plant: carrying out water body detection on the domestic wastewater subjected to reverse osmosis treatment by using a water quality detector, and sending the qualified water body to a final neutralization pond;
step seven: adjusting the pH value of domestic sewage of a thermal power plant: and finally, detecting the pH value of the water body in the neutralization tank, adding acid or alkali into the neutralization tank according to the pH detection result, and adjusting the pH value to facilitate the application of the water body in the circulating cooling water system.
Preferably: the sedimentation filter tank is internally divided into an upper layer, a middle layer and a lower layer, each layer is provided with a filter screen with different pores, and the pores of the filter screens are sequentially reduced from high to low, so that the domestic sewage of the thermal power plant is gradually precipitated and filtered, and the sedimentation filter effect of the domestic sewage of the thermal power plant is effectively ensured.
Preferably: the regulating tank is large in volume, and the problem that the quality of domestic sewage water is high, the fluctuation of the water quantity is large, and the influence on the dehydration rate of the domestic sewage water production is avoided.
Preferably: the flocculation tank is added with a coagulant aid in the flocculation process so as to accelerate the formation of floccules in the wastewater.
Preferably: the reverse osmosis treatment is to separate the solute from the solvent in the domestic sewage by means of selective interception of a semipermeable membrane which allows only water to permeate but not other substances under the action of pressure higher than the osmotic pressure of the domestic sewage.
Preferably: by utilizing the separation characteristic of the reverse osmosis treatment, dissolved salts, colloids, organic matters, bacteria and microorganism impurities in domestic sewage can be effectively removed.
Preferably: the pH value of the water supplement of the circulating cooling water applied in the circulating cooling water system is 6.5-9.5.
The difference between the example four and the implementation three is that: and the water body which is not detected by the water quality detector is sent into an ultrafiltration tank for ultrafiltration treatment, an ultrafiltration membrane is arranged in the ultrafiltration tank, and the pore size of the ultrafiltration membrane is 0.1-0.2 mu m. And the water body after the ultrafiltration treatment in the ultrafiltration tank is sent into a reverse osmosis tank again to finish the reverse osmosis treatment again so as to ensure that the water body is qualified in detection. The ultrafiltration treatment in the ultrafiltration tank can get rid of insoluble material in the domestic sewage, reduces the pollution risk of particulate matter to ultrafiltration treatment can avoid the reverse osmosis treatment in-process to be dirty stifled by the colloid, sets up a super filtering pond in water quality testing department, ensures that the unqualified water of water quality testing can carry out repeated ultrafiltration and prevention of seepage and passes through the processing, and it is better to ensure the water quality after handling, makes it can the reuse in recirculating cooling water system, greatly increased domestic sewage's rate of recovery.
Ultrafiltration is a pressurized membrane separation technique, in which small molecular solutes and solvents are passed through a special membrane with a certain pore size under a certain pressure, while large molecular solutes are not passed through the membrane and remain on one side of the membrane, thus partially purifying the large molecular substances. Ultrafiltration is one of membrane separation techniques using pressure as a driving force, and aims to separate macromolecules from small molecules.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A treatment method for reusing domestic sewage of a thermal power plant in a circulating cooling water system is characterized by comprising the following steps:
the method comprises the following steps: precipitating and filtering domestic sewage of a thermal power plant;
step two: adjusting domestic sewage of a thermal power plant;
step three: flocculation of domestic sewage of a thermal power plant;
step four: high-efficiency filtration of domestic sewage of a thermal power plant;
step five: reverse osmosis of domestic sewage of a thermal power plant;
step six: detecting the quality of domestic sewage of a thermal power plant;
step seven: adjusting the pH value of domestic sewage of the thermal power plant.
2. The method for treating domestic sewage of a thermal power plant as claimed in claim 1, wherein the domestic sewage of the thermal power plant is pumped into the precipitation and filtration tank by a sewage lift pump to complete the preliminary precipitation and filtration of the domestic sewage of the thermal power plant, the sewage after the precipitation and filtration is sent into the adjustment tank to complete the adjustment of the water quality and the water quantity, the water quality and the water quantity of the domestic sewage are adjusted by the adjustment tank and then sent into the flocculation tank, a flocculating agent is added into the flocculation tank to realize the flocculation of the domestic sewage, a flocculating constituent is formed in the domestic sewage, the flocculation is completed, the flocculated domestic sewage passes through a high efficiency fiber filter to realize the high efficiency filtration of the domestic sewage, so that the domestic sewage is separated from the flocculating constituent to remove larger particle pollutants in the domestic sewage, the domestic sewage after the high efficiency filtration is sent into a reverse osmosis tank to perform reverse osmosis treatment, and (3) carrying out water body detection on the domestic wastewater subjected to reverse osmosis treatment by using a water quality detector, sending the qualified water body to a final neutralization tank, carrying out pH value detection on the water body in the final neutralization tank, adding acid or alkali into the final neutralization tank according to a pH detection result, and adjusting the pH value so as to facilitate the application of the water body in the circulating cooling water system.
3. The treatment method for recycling domestic sewage of the thermal power plant to the circulating cooling water system according to claim 2, wherein the interior of the sedimentation filter tank is divided into an upper layer, a middle layer and a lower layer, each layer is provided with a filter screen with different pores, and the pores of the filter screens are sequentially reduced from high to low, so that the domestic sewage of the thermal power plant is gradually sedimentated and filtered, and the sedimentation filter effect of the domestic sewage of the thermal power plant is effectively ensured.
4. The method for treating the domestic sewage of the thermal power plant for recycling to the circulating cooling water system according to claim 2, wherein the regulating tank has a large volume, and the influence on the dehydration rate of the domestic sewage water production caused by the large fluctuation of the quality and the quantity of the domestic sewage water is avoided through the regulating tank with the large volume.
5. The method for treating domestic sewage of a thermal power plant for recycling to a circulating cooling water system as claimed in claim 2, wherein the flocculation tank is added with a coagulant aid during flocculation to accelerate the completion of the formation of flocs in the wastewater.
6. The method for treating domestic sewage of a thermal power plant for recycling to a circulating cooling water system according to claim 2, wherein the reverse osmosis treatment is a process for separating the solute from the solvent in the domestic sewage by means of selective interception by a semipermeable membrane which allows only water to permeate therethrough but not other substances, under a pressure higher than the osmotic pressure of the domestic sewage.
7. The method for treating domestic sewage of a thermal power plant for recycling to a circulating cooling water system according to claim 6, wherein the separation characteristic of the reverse osmosis treatment is utilized to effectively remove dissolved salts, colloids, organic matters, bacteria and microorganism impurities in the domestic sewage.
8. The method for treating the domestic sewage of the thermal power plant for recycling as a circulating cooling water system according to claim 2, wherein the water body which is not detected by the water quality detector is sent into an ultrafiltration tank for ultrafiltration treatment, the ultrafiltration membrane is arranged in the ultrafiltration tank, and the pore size of the ultrafiltration membrane is 0.1-0.2 μm.
9. The method for treating domestic sewage of a thermal power plant for recycling to a circulating cooling water system according to claim 8, wherein the water body after the ultrafiltration treatment in the ultrafiltration tank is sent to the reverse osmosis tank again to complete the reverse osmosis treatment again so as to ensure that the water body is qualified, the ultrafiltration treatment in the ultrafiltration tank can remove insoluble substances in the domestic sewage and reduce the pollution risk of particulate matters, and the ultrafiltration treatment can avoid the blockage of the reverse osmosis treatment by colloid.
10. The method for treating domestic sewage of the thermal power plant for recycling to the circulating cooling water system according to claim 2, wherein the pH value of the supplemented circulating cooling water used in the circulating cooling water system is 6.5-9.5.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2457409A1 (en) * | 2004-02-18 | 2005-08-18 | Joe Ru He Zhao | Waste water treatment process and apparatus |
| CN101215052A (en) * | 2007-12-28 | 2008-07-09 | 张大群 | Technique and device for treating sewage to reclaimed water |
| CN102432117A (en) * | 2010-09-29 | 2012-05-02 | 中国石油化工股份有限公司 | Deep purification treatment method for sewage |
| CN104986922A (en) * | 2015-07-16 | 2015-10-21 | 三达水（北京）科技有限公司 | Sewage reuse system and sewage treatment method |
| CN105668850A (en) * | 2016-01-25 | 2016-06-15 | 新疆心连心能源化工有限公司 | Process for treating reuse water |
| CN105948365A (en) * | 2016-07-15 | 2016-09-21 | 武汉尚远环保股份有限公司 | Method for treating town sewage |
| CN109912068A (en) * | 2018-08-24 | 2019-06-21 | 吉林省京能水处理技术有限公司 | Blowdown water purification circuit and purification process based on reverse osmosis deaslination processing |
| CN113003800A (en) * | 2021-02-25 | 2021-06-22 | 上海金厦实业有限公司 | Wastewater quality-based treatment process |
| CN213708053U (en) * | 2020-09-28 | 2021-07-16 | 上海辰聚机电科技有限公司 | Inorganic wastewater treatment device |
-
2022
- 2022-01-25 CN CN202210083254.9A patent/CN114394695A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2457409A1 (en) * | 2004-02-18 | 2005-08-18 | Joe Ru He Zhao | Waste water treatment process and apparatus |
| CN101215052A (en) * | 2007-12-28 | 2008-07-09 | 张大群 | Technique and device for treating sewage to reclaimed water |
| CN102432117A (en) * | 2010-09-29 | 2012-05-02 | 中国石油化工股份有限公司 | Deep purification treatment method for sewage |
| CN104986922A (en) * | 2015-07-16 | 2015-10-21 | 三达水（北京）科技有限公司 | Sewage reuse system and sewage treatment method |
| CN105668850A (en) * | 2016-01-25 | 2016-06-15 | 新疆心连心能源化工有限公司 | Process for treating reuse water |
| CN105948365A (en) * | 2016-07-15 | 2016-09-21 | 武汉尚远环保股份有限公司 | Method for treating town sewage |
| CN109912068A (en) * | 2018-08-24 | 2019-06-21 | 吉林省京能水处理技术有限公司 | Blowdown water purification circuit and purification process based on reverse osmosis deaslination processing |
| CN213708053U (en) * | 2020-09-28 | 2021-07-16 | 上海辰聚机电科技有限公司 | Inorganic wastewater treatment device |
| CN113003800A (en) * | 2021-02-25 | 2021-06-22 | 上海金厦实业有限公司 | Wastewater quality-based treatment process |
Non-Patent Citations (2)
| Title |
|---|
| 李红卫: "反渗透技术在中水回用系统中的应用探讨", 《环境与发展》 * |
| 苗志加等: "钢厂废水处理工程设计实例", 《河北企业》 * |
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