CN108751445A - The method and its application of circular cooling water quality stabilizer are prepared using zinc-containing water - Google Patents

The method and its application of circular cooling water quality stabilizer are prepared using zinc-containing water Download PDF

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CN108751445A
CN108751445A CN201810558109.5A CN201810558109A CN108751445A CN 108751445 A CN108751445 A CN 108751445A CN 201810558109 A CN201810558109 A CN 201810558109A CN 108751445 A CN108751445 A CN 108751445A
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zinc
water quality
quality stabilizer
water
cooling water
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CN108751445B (en
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刘璞
张垒
刘海英
刘尚超
王丽娜
舒纯
俞琴
吴高明
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Co Ltd
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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
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C02F5/105—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances combined with inorganic substances
    • 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
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F3/00—Biological treatment of water, waste water, or sewage

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The present invention also provides a kind of method and its application preparing circular cooling water quality stabilizer using zinc-containing water；This method removes the suspended oil that grain size in zinc-containing water is more than 15 μm first, in sedimentation separation, then removes various organic matters, and adjusting pH value makes the iron of solubilised state in waste water precipitate, and adds flocculant precipitation and filtrate is obtained by filtration；Organic matter and inorganic matter are added into filtrate, is configured to water quality stabilizer；Water quality stabilizer is added into industrial circulating cooling water and carries out scale inhibition, wherein when water stabilization dosage is 15~30mg/L, scale inhibition performance can reach 88% or more.For the method for the present invention compared with simple chemical precipitation, the sludge good utilisation of generation will not cause secondary pollution to environment.The method of the present invention is all the conventional method of wastewater treatment, and operation is simple and feasible, and operating cost is controllable, is easy to commercial Application.

Description

The method and its application of circular cooling water quality stabilizer are prepared using zinc-containing water
Technical field
The present invention relates to field of waste water treatment, and in particular to a kind of to prepare circulation cooling water quality stabilizing using zinc-containing water The method and its application of agent.
Background technology
In the metal that contemporary mankind uses, zinc is the heavy metal of the fourth-largest dosage after being only second to iron, aluminium, copper, In the industries such as smelting, food and pharmacy, zinc resource is widely used.Recently as economic fast development, the production of zinc Growth at full speed has also been obtained with consumption.The waste of the industry such as mining, pigment, smelting, plating, intermetallic composite coating, chemical industry becomes The main source of zinc heavy metal pollution in environment.Zinc-containing water is for its total amount, than the water of papermaking, printing and dyeing, chemical industry, pesticide etc. Measure small, pollution face is narrow, but wide due to being distributed, and harmfulness is prodigious, and with the spies such as persistence, high toxicity, seriously polluted Point is not easy to be biodegradable after being discharged into environment, and most of enrichment concentrations in vivo destroy organism normal physiological generation Thank to activity.Water environment is not only polluted, water body safety is threatened, also threatens the existence of health and aquatile.
Zinc is to maintain body normal growth and development, the important substance of metabolism and health is essential has Beneficial element.It is widely present in human muscle and bone, but content is little, and human body zinc-deficiency will appear many ill symptoms, But serious consequence can also occur for content excess.The discharge of zinc-containing water has health and industrial and agricultural production activity tight Endanger again, with the mankind to the exploitation of heavy metal, smelting, processing and business manufacture etc. production it is movable increasingly increase, not only from The generation that heavy metal wastewater thereby is all substantially increased in quantity and from type, makes severe environmental pollution, the wasting of resources.Therefore Improvement for zinc-containing water is still the research topic that world's field of environment protection can not be relaxed.
Currently, the processing method of comparison system has Physical and chemical precipitation method, but they are deposited in Treatment of Zinc-containing Wastewater In some disadvantages：Physico-chemical process treating capacity is little, and operation is relative complex, is only suitable for processing and forms simple zinc-containing water.And it is chemical The precipitation method need that a large amount of precipitating reagent is added, and a large amount of waste residue is generated after filtering, and processing procedure is long, generally generate a large amount of secondary Pollution；If these utilising zinc containing waste residues are dumped field, has a large amount of zinc and be wasted, while polluted surface and ground by vadose solution Lower water system causes serious environmental pollution, will produce undesirable influence to humans and animals.As can using suitable method by these Zinc is separated and is further purified from waste residue, and the product of application value is formed with, and remaining waste residue is back to use production work Sequence had not only solved pollution problem but also larger economic benefit can be obtained.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of circulating cooling is prepared using zinc-containing water The method and its application of water quality stabilizer, the water quality stabilizer solve the problems, such as following：
1) sludge for utilizing this method Treatment of Zinc-containing Wastewater to generate, can directly be raw again production, will not be caused to environment secondary Pollution.
2) pass through this method treated zinc-containing water, on the one hand realize the recycling of waste water, it on the other hand can be real The now recycling of part solid waste, achievees the purpose that energy-saving and environmental protection.
To achieve the above object, a kind of designed by the present invention to prepare circular cooling water quality stabilizer using zinc-containing water Method includes the following steps：
1) zinc-containing water generated in cold rolling electroplating zinc unit production process is passed through in oil separator, is gone using gravitational separation process Except grain size is more than 15 μm of suspended oil；
2) zinc-containing water after above-mentioned oil removing is discharged into regulating reservoir and carries out preliminary sedimentation and separation；
3) waste water that above-mentioned regulating reservoir is discharged is removed into various organic matters by biological contact oxidation filter tank, keeps COD notable It reduces；It removes various organic matters and enters sludge concentration tank；
4) waste water by the processing discharge of above-mentioned regulating reservoir enters pH buffer pools, and adjustment pH value to 5~6 keeps 10~20min So that the iron of solubilised state in waste water is precipitated, adjusts pH value of waste water to 7~8；Because zinc hydroxide is amphiprotic substance, when pH value is 9~11, Zinc hydroxide can precipitate；
5) flocculant is added into pH value to 7~8 waste water, stirs coagulating sedimentation suspended state iron and other heavy metals, obtains To supernatant and precipitation, supernatant liquid filtering obtains filtrate, spare, and suspended state iron and other heavy metals are discharged into sludge concentration tank；
The supernatant being prepared is prepared into industrial circulating cooling water water quality stabilizer as stoste.It is recycled in industrial water The dosage of cooling water occupy the first, and the dosage of general recirculated cooling water accounts for 60% of industrial water or more.China is in industry at present Still very low with the water saving level in terms of water, water-saving potentiality are also very big, and circulating water quality stabilizer is in actual production Extensive use is very effective a kind of water saving measures.In industrial circulating cooling water, for control corrosion rate, fouling and microorganism Glutinous mud etc. must add water quality stabilizer, and water quality stabilizer generally uses the corrosion inhibition formula containing zinc, zinc salt can be by carbon steel Surface Oxygen Change, forms one layer of very thin oxidation film, be firmly adsorbed on carbon steel, change the corrosion potential of carbon steel, reduce the corrosion of carbon steel Speed.Only several nanometers, film are evenly distributed, are fine and close the thickness of this layer of oxidation film, and corrosion protection result is preferable.
6) organic matter and inorganic matter are added into filtrate, is configured to water quality stabilizer, wherein the organic matter is selected from polycyclic Oxydisuccinic acid (PESA), poly-aspartate (PASP), polymaleic anhydride, Sodium Polyacrylate, aminotrimethylene fork phosphoric acid and Portugal Grape sodium saccharate；The inorganic matter includes sodium molybdate and zinc salt.
Further, in the step 3), in biological contact oxidation filter tank, wastewater flow rate and H2O2Volume ratio 50~100: 1, Wherein, H2O2Mass fraction is 30%.In acid condition, H2O2With Fe in waste water2+The oxygen of effect plus biological contact oxidation filter tank Change acts on, and the filter tank filler is board-like using oblique ripple.
Still further, in the step 5), the ratio of flocculant and waste water is 1~5 ‰；The flocculant is selected from poly- third Acrylamide and polymerization ferrous sulfate.
Still further, in the step 5), in whipping process, stir 1 first under 100~150r/min speed~ 2min, then 5~8min is stirred under 40~50r/min speed.
Still further, in the step 6), the content of each component is in water quality stabilizer：0~40% polycyclic oxygen amber Amber acid (PESA), 0~40% poly-aspartate (PASP), 0~40% polymaleic anhydride, 0~40% polyacrylic acid Sodium, 0~40% aminotrimethylene fork phosphoric acid, 5%~10% sodium gluconate, 10%~15% sodium molybdate and 5% ~10% zinc salt.
Still further, in the step 6), the content of each component is in water quality stabilizer：35% poly-epoxy succinic acid (PESA), 35% poly-aspartate (PASP), 5% sodium gluconate, 15% sodium molybdate and 10% zinc salt.
The present invention also provides the water quality stabilizers being prepared to be applied in industrial circulating cooling water, the side of the application Method：Water quality stabilizer is added into industrial circulating cooling water and carries out scale inhibition, wherein when water stabilization dosage is 15~30mg/L, Scale inhibition performance can reach 88% or more.
Beneficial effects of the present invention：
1) for this method compared with simple chemical precipitation, the sludge good utilisation of generation will not cause secondary pollution to environment.
2) this method is all the conventional method of wastewater treatment, and operation is simple and feasible, and operating cost is controllable, is easy to industry and answers With.
3) pass through this method treated waste water from electric galvanization in cold rolling, on the one hand realize the recycling of waste water, another party Face can realize the recycling of part solid waste, achieve the purpose that energy-saving and environmental protection.
4) benign cycle of " treatment of wastes with processes of wastes against one another is turned waste into wealth " is formed.
Description of the drawings
Fig. 1 is the flow chart handled using zinc-containing water；
Fig. 2 is water quality stabilizer scale inhibition effect comparison diagram prepared by three embodiments.
Specific implementation mode
The present invention is described in further detail in the following with reference to the drawings and specific embodiments, so as to those skilled in the art Understand.
Embodiment 1
The method for preparing circular cooling water quality stabilizer 1 using zinc-containing water, includes the following steps：
1) the 2L zinc-containing waters generated in cold rolling electroplating zinc unit production process are passed through in oil separator, utilize gravitational separation process 10min is stopped, removal grain size is more than 15 μm of suspended oil；
2) zinc-containing water after above-mentioned oil removing is discharged into regulating reservoir, regulating reservoir hydraulic detention time 8min carries out tentatively heavy Drop and separation；
3) waste water that above-mentioned regulating reservoir is discharged is slowly added to the quality of 30mL by biological contact oxidation filter tank in pond The H that score is 30%2O2, hydraulic detention time 30min in pond, the Fe in pH value is 3~5, with waste water2+Oxygen occurs for interaction Change reaction, removes various organic matters, COD is made to significantly reduce；It removes various organic matters and enters sludge concentration tank；
4) waste water by the processing discharge of above-mentioned regulating reservoir enters pH buffer pools, then under stirring conditions (220 revs/min) The NaOH solution that mass fraction is 30% is slowly added in pH buffer pools, adjustment pH value to 5~6 keeps 15min, makes in waste water The iron of solubilised state precipitates, and adjusts pH value of waste water to 7~8；
5) flocculant is added into pH value to 7~8 waste water, is slowly added to the bodied ferric sulfate 2mL that mass fraction is 5% The polyacrylamide 1mL for being 0.1% with mass fraction, stirs 1min, then stirred under 40r/min speed under 120r/min speed 5min is mixed, so that suspended state iron and other heavy metals in waste water is settled down, free zinc ion can not be converted into Zn (OH)2It is heavy to occur It forms sediment and reacts, obtain supernatant and precipitation, supernatant liquid filtering obtains filtrate, spare, and precipitation is discharged into sludge concentration tank；
6) poly-epoxy succinic acid is added into filtrate, polymaleic anhydride, sodium gluconate, sodium molybdate, zinc salt, is configured to water Matter stabilizer 1, wherein the content of each component is in water quality stabilizer 1：30% poly-epoxy succinic acid (PESA), 40% it is poly- Maleic anhydride, 10% sodium gluconate, 10% sodium molybdate and 10% zinc salt.
Aforementioned proportion proportioning water quality stabilizer 1 in industrial circulating cooling water dosage be 25mg/L when, scale inhibition performance can Reach 90% or more.
Embodiment 2
The method for preparing circular cooling water quality stabilizer 2 using zinc-containing water, includes the following steps：
1) the 4L zinc-containing waters generated in cold rolling electroplating zinc unit production process are passed through in oil separator, utilize gravitational separation process 10min is stopped, removal grain size is more than 15 μm of suspended oil；
2) zinc-containing water after above-mentioned oil removing is discharged into regulating reservoir, regulating reservoir hydraulic detention time 8min carries out tentatively heavy Drop and separation；
3) waste water that above-mentioned regulating reservoir is discharged is slowly added to the quality of 60mL by biological contact oxidation filter tank in pond The H that score is 30%2O2, hydraulic detention time 30min in pond, the Fe in pH value is 3~5, with waste water2+Oxygen occurs for interaction Change reaction, removes various organic matters, COD is made to significantly reduce；It removes various organic matters and enters sludge concentration tank；
4) waste water by the processing discharge of above-mentioned regulating reservoir enters pH buffer pools, then under stirring conditions (220 revs/min) The NaOH solution that mass fraction is 30% is slowly added in pH buffer pools, adjustment pH value to 5~6 keeps 15min, makes in waste water The iron of solubilised state precipitates, and adjusts pH value of waste water to 7~8；
5) flocculant is added into pH value to 7~8 waste water, is slowly added to the bodied ferric sulfate that mass fraction is 7.5% The polyacrylamide 2mL that 5mL and mass fraction are 0.1%, stirs 1min, then in 45r/min speed under 100r/min speed Lower stirring 8min makes suspended state iron and other heavy metals in waste water settle down, and free zinc ion can not be converted into Zn (OH)2Hair Raw precipitation reaction, obtains supernatant and precipitation, and supernatant liquid filtering obtains filtrate, spare, and precipitation is discharged into sludge concentration tank；
6) aminotrimethylene fork phosphoric acid, Sodium Polyacrylate, sodium gluconate, sodium molybdate and zinc salt are added into filtrate, It is configured to water quality stabilizer 2, wherein the content of each component is in water quality stabilizer 2：40% aminotrimethylene fork phosphoric acid, 30% Sodium Polyacrylate, 8% sodium gluconate, 12% sodium molybdate and 10% zinc salt.
Aforementioned proportion proportioning water quality stabilizer 2 in industrial circulating cooling water dosage be 15mg/L when, scale inhibition performance can Reach 88% or more.
Embodiment 3
The method for preparing circular cooling water quality stabilizer 3 using zinc-containing water, includes the following steps：
1) the 5L zinc-containing waters generated in cold rolling electroplating zinc unit production process are passed through in oil separator, utilize gravitational separation process 10min is stopped, removal grain size is more than 15 μm of suspended oil；
2) zinc-containing water after above-mentioned oil removing is discharged into regulating reservoir, regulating reservoir hydraulic detention time 8min carries out tentatively heavy Drop and separation；
3) waste water that above-mentioned regulating reservoir is discharged is slowly added to the quality of 80mL by biological contact oxidation filter tank in pond The H that score is 30%2O2, hydraulic detention time 30min in pond, the Fe in pH value is 3~5, with waste water2+Oxygen occurs for interaction Change reaction, removes various organic matters, COD is made to significantly reduce；It removes various organic matters and enters sludge concentration tank；
4) waste water by the processing discharge of above-mentioned regulating reservoir enters pH buffer pools, then under stirring conditions (220 revs/min) It is 30%NaOH solution that mass fraction is slowly added in pH buffer pools, and adjustment pH value to 5~6 keeps 15min, makes molten in waste water The iron precipitation for solving state, adjusts pH value of waste water to 7~8；
5) flocculant is added into pH value to 7~8 waste water, is slowly added to the bodied ferric sulfate that mass fraction is 6% The polyacrylamide 2mL that 10mL and mass fraction are 0.1%, stirs 2min, then in 50r/min speed under 110r/min speed Lower stirring 8min makes suspended state iron and other heavy metals in waste water settle down, and free zinc ion can not be converted into Zn (OH)2Hair Raw precipitation reaction, obtains supernatant and precipitation, and supernatant liquid filtering obtains filtrate, spare, and precipitation is discharged into sludge concentration tank；
6) poly-epoxy succinic acid, poly-aspartate, sodium gluconate, sodium molybdate, zinc salt are added into filtrate, is configured to water Matter stabilizer 3, wherein the content of each component is in water quality stabilizer 3：35% poly-epoxy succinic acid, 35% poly- asparagus fern ammonia Acid, 5% sodium gluconate, 15% sodium molybdate, 10% zinc salt.
Aforementioned proportion proportioning water quality stabilizer 3 in industrial circulating cooling water dosage be 15mg/L when, scale inhibition performance can Reach 90% or more.
Embodiment 4
The method that the present embodiment prepares filtrate is identical as the method for embodiment 3, the difference is that：
The content of each component is in water quality stabilizer 4：20% poly-epoxy succinic acid (PESA), 20% poly-aspartate (PASP), 5% polymaleic anhydride, 5% Sodium Polyacrylate, 10% aminotrimethylene fork phosphoric acid, 5% gluconic acid Sodium, 10% sodium molybdate and 5% zinc salt.
Aforementioned proportion proportioning water quality stabilizer 4 in industrial circulating cooling water dosage be 15mg/L when, scale inhibition performance can Reach 80% or more.
Embodiment 5
The method that the present embodiment prepares filtrate is identical as the method for embodiment 3, the difference is that：
The content of each component is in water quality stabilizer 5：40% poly-aspartate (PASP), 40% polyacrylic acid Sodium, 5% sodium gluconate, 10% sodium molybdate and 5% zinc salt.
Aforementioned proportion proportioning water quality stabilizer 3 in industrial circulating cooling water dosage be 15mg/L when, scale inhibition performance can Reach 70% or more.
Embodiment 6
The method that the present embodiment prepares filtrate is identical as the method for embodiment 3, the difference is that：
The content of each component is in water quality stabilizer 6：10% poly-epoxy succinic acid (PESA), 20% poly-aspartate (PASP), 40% Sodium Polyacrylate, 10% aminotrimethylene fork phosphoric acid, 8% sodium gluconate, 12% sodium molybdate With 10% zinc salt.
Three kinds of table 1, embodiment water stabilization agent prescriptions
Other unspecified parts are the prior art.Although above-described embodiment is made that the present invention and retouches in detail State, but it is only a part of the embodiment of the present invention, rather than whole embodiments, people can also according to the present embodiment without Other embodiment is obtained under the premise of creativeness, these embodiments belong to the scope of the present invention.

Claims (7)

1. a kind of method preparing circular cooling water quality stabilizer using zinc-containing water, it is characterised in that：Include the following steps：
1) zinc-containing water generated in cold rolling electroplating zinc unit production process is passed through in oil separator, and grain is removed using gravitational separation process Diameter is more than 15 μm of suspended oil；
2) zinc-containing water after above-mentioned oil removing is discharged into regulating reservoir and carries out preliminary sedimentation and separation；
3) waste water that above-mentioned regulating reservoir is discharged is removed into various organic matters by biological contact oxidation filter tank, COD is made to significantly reduce； It removes various organic matters and enters sludge concentration tank；
4) waste water of above-mentioned regulating reservoir processing discharge is entered into pH buffer pools, adjustment pH value to 5~6 10~20min of holding makes to give up The iron precipitation of solubilised state, adjusts pH value of waste water to 7~8 in water；
5) flocculant is added into pH value to 7~8 waste water, stirs coagulating sedimentation suspended state iron and other heavy metals, obtains Clear liquid, supernatant liquid filtering obtains filtrate, spare, and suspended state iron and other heavy metals are discharged into sludge concentration tank；
6) organic matter and inorganic matter are added into filtrate, is configured to water quality stabilizer, wherein the organic matter is selected from polycyclic oxygen amber Amber acid, poly-aspartate, polymaleic anhydride, Sodium Polyacrylate, aminotrimethylene fork phosphoric acid and sodium gluconate；It is described inorganic Object includes sodium molybdate and zinc salt.
2. the method for preparing circular cooling water quality stabilizer using zinc-containing water according to claim 1, it is characterised in that： In the step 3), in biological contact oxidation filter tank, wastewater flow rate and H2O2Volume ratio 50~100: 1, wherein H2O2Mass fraction It is 30%.
3. the method for preparing circular cooling water quality stabilizer using zinc-containing water according to claim 1, it is characterised in that： In the step 5), the ratio of flocculant and waste water is 1~5 ‰；The flocculant is selected from polyacrylamide and polyaluminum sulfate is sub- Iron.
4. according to the method for preparing circular cooling water quality stabilizer using zinc-containing water of claim 1 or 3, feature exists In：In the step 5), in whipping process, 1~2min is stirred first under 100~150r/min speed, then in 40~50r/ 5~8min is stirred under min speed.
5. the method for preparing circular cooling water quality stabilizer using zinc-containing water according to claim 1, it is characterised in that： In the step 6), the content of each component is in water quality stabilizer：0~40% poly-epoxy succinic acid, 0~40% poly- asparagus fern Propylhomoserin, 0~40% polymaleic anhydride, 0~40% Sodium Polyacrylate, 0~40% aminotrimethylene fork phosphoric acid, 5% ~10% sodium gluconate, 10%~15% sodium molybdate and 5%~10% zinc salt.
6. the method for preparing circular cooling water quality stabilizer using zinc-containing water according to claim 5, it is characterised in that： In the step 6), the content of each component is in water quality stabilizer：35% poly-epoxy succinic acid, 35% poly-aspartate, 5% sodium gluconate, 15% sodium molybdate and 10% zinc salt.
7. a kind of water quality stabilizer that claim 1 the method is prepared is applied in industrial circulating cooling water, feature It is：The method of the application：Water quality stabilizer is added into industrial circulating cooling water and carries out scale inhibition, wherein water quality stabilizer When amount is 15~30mg/L, scale inhibition performance can reach 88% or more.
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