CN106242085A - A kind of circularly-cooling sea water non-phosphorus scale and corrosion inhibitor and preparation method thereof - Google Patents
A kind of circularly-cooling sea water non-phosphorus scale and corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN106242085A CN106242085A CN201610726289.4A CN201610726289A CN106242085A CN 106242085 A CN106242085 A CN 106242085A CN 201610726289 A CN201610726289 A CN 201610726289A CN 106242085 A CN106242085 A CN 106242085A
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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
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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
- 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
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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
- 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
- C02F5/12—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 containing nitrogen
- C02F5/125—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 containing nitrogen combined with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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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
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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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
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
-
- 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
- C02F5/14—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 containing phosphorus
- C02F5/145—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 containing phosphorus combined with inorganic substances
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention belongs to water reagent treatment technical field, disclosing a kind of circularly-cooling sea water non-phosphorus scale and corrosion inhibitor and preparation method thereof, it is made up of the raw material of following percentage by weight: 20～the BTA of the hydroxyacetic acid of the organic inhibitor of the inorganic inhibitor of the PAPE of carboxylic acids polymer, 0～5%, 1～5%, 1～5%, 1～5%, 0.5～1% of 50% and the deionized water of surplus.It is an advantage of the current invention that: each component in the present invention has good complementarity, concertedness and compatibility, there is higher anticorrosion-antiscaling property, the fouling corrosion problem using sea water as recirculated cooling water can be solved, material therefor of the present invention is the environment-friendly materials of easily biological-degradable, belong to low toxicity level industrial products, not pollution of marine environment, is a kind of efficient, economic without phosphorus, environmental protection, antibacterial type sea water water treatment agent.
Description
Technical field
The invention belongs to water reagent treatment technical field, more particularly, it relate to a kind of circularly-cooling sea water without phosphorus
Anti-incrustation corrosion inhibitor and preparation method thereof.
Background technology
Owing to China's Coastal Areas freshwater resources are in short supply, build in bay and coal-fired power plant's many uses sea water in coastal waters
As recirculated cooling water, substantial amounts of freshwater resources so can be saved.But, the recirculated cooling water direct current discharge of coal-fired power plant
Can cause environment waters eutrophication, can promote the growth of bacterium algae, life is also destroyed in marine site near severe contamination coal-fired power plant
State environment.Therefore, it is necessary to use circularly-cooling sea water treatment technology, technique is at once-though cooling technology and fresh water
Propose on the basis of recirculation refrigerating technology.
Owing to the salinity of sea water is higher, the corrosivity, the ion concentration of fouling tendency that contain are significantly larger than general fresh water,
And content of microorganisms is high, and other biological kind is the most more, " industrial circulating cooling water processes design rule not to meet national standard
Model " water quality requirement of recirculated cooling water that specifies.Thus, serious corrosion and scaling can be caused with sea water as recirculated cooling water
With problems such as sludge organism attachments.It is therefore desirable to develop one be applicable to different working condition, various material (include rustless steel,
Carbon steel, copper and alloy thereof, aluminum and alloy, titanium alloy etc.) the new type water reagent treatment of circularly-cooling sea water.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, it is provided that a kind of circularly-cooling sea water non-phosphorus scale
Corrosion inhibiter, its have without phosphorus, easily biological-degradable, anticorrosion-antiscaling property are excellent and the advantage such as environmental protection；Invention also provides sea
The preparation method of water recirculated cooling water non-phosphorus scale and corrosion inhibitor, scientific and reasonable, simple.
In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is:
A kind of circularly-cooling sea water non-phosphorus scale and corrosion inhibitor, is made up of the raw material of following percentage by weight:
Preferably, the mass percent of each feedstock optimization is:
Preferably, described carboxylic acids polymer is for amber selected from poly-epoxy succinic acid, poly-aspartate, S-carboxyethyl sulfur
Amber acid, hydrolytic polymaleic anhydride, copolymer of maleic anhydride and acrylic acid, acrylic acid-acrylic acid methyl ester-Hydroxypropyl acrylate copolymerization
One or more in thing.
Preferably, described inorganic inhibitor is sodium tungstate.
Preferably, described organic inhibitor is sodium gluconate.
The preparation method of circularly-cooling sea water non-phosphorus scale and corrosion inhibitor of the present invention is as follows:
(1) successively carboxylic acids polymer and deionized water are put in reactor, stir 10 minutes under room temperature；
(2) release from reactor 80～120kg carboxylic acids polymer and the mixed solution of deionized water to open drum
In, in open drum, put into sodium tungstate, after stirring and dissolving, the mixed solution in open drum is put in reactor；
(3) successively organic inhibitor and BTA are added in reactor slowly, stir 30 minutes under room temperature；
(4) PAPE is put in head tank, after reactor is warming up to 40 DEG C, drip polynary in reactor
Alcohol phosphate ester, the temperature controlled in reactor during dropping is 40～50 DEG C, after dropping, stirs under conditions of 40～50 DEG C
30 minutes；
(5) reactor is cooled to less than 30 DEG C, hydroxyacetic acid is put in reactor, stir 30 minutes under room temperature, put
Expect, filter and get final product.
When using circularly-cooling sea water non-phosphorus scale and corrosion inhibitor of the present invention, it is only necessary to the present invention is directly added into circulation
In cooling water, addition is 30～60mg/L.
The inhibitor mechanism of the present invention is as follows:
Carboxylic acids polymer in inventive formulation is the macromolecular compound containing macromolecular chain, due to electrostatic repulsion,
Solubilising and distortion of lattice effect exist, thus multiple inorganic scale and colloid dirt are had preferable dispersing and dissolving ability.Carboxylic acids
Polymer has dispersion and scale effect, can disperse the difficulty soluble salt microgranule that can become difficulty soluble salt nucleus of crystal, reduces or control difficulty
Dissolved salt be gathered into dirt, moreover it is possible to make the crystal generation distortion of lattice of deposition, reach the purpose of scale inhibition, be used for preventing calcium carbonate, silicon
Hydrochlorate, sulfate and phosphatic scale deposition.
Poly-aspartate and sodium salt thereof have the phthalein amine groups as protein, can biodegradation, again have chelating and
Divergent function.Poly-epoxy succinic acid is a kind of nitrogen-free, non-phosphorus organic compound, has chelation to many kinds of metal ions, raw
Thing degradability is good, environmental protection.S-carboxyethyl sulfosuccinic acid heavy metal sequestering, anti acid alkali performance good, dispersibility is stronger
And there is extraordinary biodegradability.Containing a sulfonic group and three in each S-carboxyethyl sulfosuccinic acid molecular structures
Individual carboxyl, is better than containing Phosphorus antisludging agent in terms of scale inhibitor effect, and can be suitably used for numerous different quality, can be at metal watch
Face generates fine and close protecting film suppression metal erosion, can compound with other compound simultaneously, enhance inhibition effect greatly.
PAPE can be with the Ca in water2+、Mg2+Plasma generates the most stable cyclic complexes, thus reduces
Ca in water2+、Mg2+Isoionic concentration, makes the probability separating out calcium carbonate scale in water diminish, even if in flood pattern
In the case of having calcium dirt precipitation, it can also make calcium dirt loosen, and generates readily flowed floccule and is taken away by current, therefore can
Effectively stop or alleviate scaling salt class in water and form incrustation scale.The toxicity of PAPE is relatively low, can be within a certain period of time
Being broken off, its hydrolyzate can also be not susceptible to public hazards formula blowdown problem by biological natural degradation.Hydrolyzed polymaleic anhydride
Acid anhydride, copolymer of maleic anhydride and acrylic acid, acrylic acid-acrylic acid methyl ester-Hydroxypropyl acrylate copolymer are the most biodegradable.
The inhibition mechanism of the present invention is as follows:
Sodium tungstate is a kind of environment-friendly type corrosion inhibiter, and advantage is nuisanceless, can work in the basic conditions, to carbon steel, purple
Copper, copper alloy, aluminum, zinc all have corrosion inhibition.All have very to corrosion of carbon steel and to stainless stress corrosion preventing chloride ion
Good effect.Sodium gluconate is the corrosion inhibiting and descaling agent of a kind of multi-hydroxy carboxy acid's type, and corrosion mitigating effect raises with temperature and increases, when
The corrosion mitigating effect of tungstates can be made when it compounds with tungsten corrosion inhibitor to significantly improve.Sodium gluconate is nontoxic, does not results in ring
Environment pollution.This formula is added with BTA, copper and copper alloy are had good corrosion inhibition, same to ferrous metal
Effectively.
Meanwhile, the present invention there is a small amount of hydroxyacetic acid due to compounding, therefore enhances the bactericidal property of the present invention, due to hydroxyl
Guanidine-acetic acid contains the special construction of hydroxyl and carboxyl, can form Hydrophilic chelate thing with metal cation by coordinate bond, the most right
The growth of iron-oxidizing bacterium has obvious inhibitory action.
Compared with prior art, the present invention is had the beneficial effect that
1, each component in the present invention has good complementarity, concertedness and compatibility, has higher scale inhibitor
Performance, can solve the fouling corrosion problem using sea water as recirculated cooling water, be particularly well-suited to the materials such as copper, carbon steel, rustless steel
Circulation manufactured by matter；
2, technical target of the product of the present invention meets " thermal power plant recirculated water anti-incrustation corrosion inhibitor " (DL/T806-2013)
Phosphate content is this requirement of research of non-phosphorus scale inhibitor less than 2.0%；
3, the present invention is when concentration rate 1.5～2.0, and the technical performance index controlling carbon steel and corrosion of copper alloy speed reaches
Carbon steel 0.075mm/a, the copper 0.005mm/a specified to " circularly-cooling sea water process design specification " (GB/T23248-2009)
Standard specification；
4, the present invention also has preferable bactericidal property, it is possible to solve the problems such as sludge organism attachment；
5, material therefor of the present invention is the environment-friendly materials of easily biological-degradable, belongs to low toxicity level industrial products, does not pollute sea
Ocean environment, is a kind of efficient, economic without phosphorus, environmental protection, antibacterial type sea water water treatment agent.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail and explanation, former in following example
The gross weight of material is 1000kg, therefore replaces percentage by weight to be described with the weight of each raw material:
Embodiment 1
(1) successively 480kg poly-epoxy succinic acid and 394kg deionized water are put in reactor, under room temperature, stir 10 points
Clock；
(2) from reactor, release the mixed solution of 80kg in open drum, in open drum, put into 20kg sodium tungstate, stir
After mixing dissolving, the mixed solution in open drum is put in reactor；
(3) successively 40kg sodium gluconate and 6kg BTA are added in reactor slowly, under room temperature, stir 30
Minute；
(4) 30kg PAPE is put in head tank, after reactor is warming up to 40 DEG C, drip in reactor
PAPE, the temperature controlled in reactor during dropping is 40～50 DEG C, after dropping, under conditions of 40～50 DEG C
Stir 30 minutes；
(5) reactor is cooled to less than 30 DEG C, 30kg hydroxyacetic acid is put in reactor, under room temperature, stir 30 points
Clock, blowing, filters and get final product.
Embodiment 2
(1) successively 300kg poly-aspartate, 150kg hydrolytic polymaleic anhydride and 413kg deionized water are put into reactor
In, stir 10 minutes under room temperature；
(2) from reactor, release the mixed solution of 100kg in open drum, in open drum, put into 30kg sodium tungstate,
After stirring and dissolving, the mixed solution in open drum is put in reactor；
(3) successively 30kg sodium gluconate and 7kg BTA are added in reactor slowly, under room temperature, stir 30
Minute；
(4) 40kg PAPE is put in head tank, after reactor is warming up to 40 DEG C, drip in reactor
PAPE, the temperature controlled in reactor during dropping is 40～50 DEG C, after dropping, under conditions of 40～50 DEG C
Stir 30 minutes；
(5) reactor is cooled to less than 30 DEG C, 30kg hydroxyacetic acid is put in reactor, under room temperature, stir 30 points
Clock, blowing, filters and get final product.
Embodiment 3
(1) successively by 200kg poly-epoxy succinic acid, 200kg copolymer of maleic anhydride and acrylic acid and 445kg deionized water
Put in reactor, stir 10 minutes under room temperature；
(2) from reactor, release the mixed solution of 80kg in open drum, in open drum, put into 20kg sodium tungstate, stir
After mixing dissolving, the mixed solution in open drum is put in reactor；
(3) successively 40kg sodium gluconate and 5kg BTA are added in reactor slowly, under room temperature, stir 30
Minute；
(4) 50kg PAPE is put in head tank, after reactor is warming up to 40 DEG C, drip in reactor
PAPE, the temperature controlled in reactor during dropping is 40～50 DEG C, after dropping, under conditions of 40～50 DEG C
Stir 30 minutes；
(5) reactor is cooled to less than 30 DEG C, 40kg hydroxyacetic acid is put in reactor, under room temperature, stir 30 points
Clock, blowing, filters and get final product.
Embodiment 4
(1) successively by 100kg acrylic acid-acrylic acid methyl ester-Hydroxypropyl acrylate copolymer, 100kg hydrolyzed polymaleic anhydride
Acid anhydride, 240kg poly-aspartate and 415kg deionized water put in reactor, stir 10 minutes under room temperature；
(2) from reactor, release the mixed solution of 120kg in open drum, in open drum, put into 40kg sodium tungstate,
After stirring and dissolving, the mixed solution in open drum is put in reactor；
(3) successively 40kg sodium gluconate and 5kg BTA are added in reactor slowly, under room temperature, stir 30
Minute；
(4) 20kg PAPE is put in head tank, after reactor is warming up to 40 DEG C, drip in reactor
PAPE, the temperature controlled in reactor during dropping is 40～50 DEG C, after dropping, under conditions of 40～50 DEG C
Stir 30 minutes；
(5) reactor is cooled to less than 30 DEG C, 40kg hydroxyacetic acid is put in reactor, under room temperature, stir 30 points
Clock, blowing, filters and get final product.
Embodiment 5
(1) successively 200kg carboxyethyl sulfosuccinic acid, 150kg copolymer of maleic anhydride and acrylic acid and 412kg are gone from
Sub-water puts in reactor, stirs 10 minutes under room temperature；
(2) from reactor, release the mixed solution of 80kg in open drum, in open drum, put into 20kg sodium tungstate, stir
After mixing dissolving, the mixed solution in open drum is put in reactor；
(3) successively 30kg sodium gluconate and 8kg BTA are added in reactor slowly, under room temperature, stir 30
Minute；
(4) 40kg PAPE is put in head tank, after reactor is warming up to 40 DEG C, drip in reactor
PAPE, the temperature controlled in reactor during dropping is 40～50 DEG C, after dropping, under conditions of 40～50 DEG C
Stir 30 minutes；
(5) reactor is cooled to less than 30 DEG C, 40kg hydroxyacetic acid is put in reactor, under room temperature, stir 30 points
Clock, blowing, filters and get final product.
The product of above 5 embodiments is carried out calcium carbonate scale-inhibiting properties mensuration, corrosion inhibition mensuration and dynamic analog examination
Testing, the calcium carbonate scale-inhibiting properties assay method used is standard GB/T/T16632-2008 " Scale Inhibitors for Water scale inhibition performance
Mensuration-tosca the method for energy ", the corrosion inhibition assay method used is that standard GB/T/T18175-2014 is " at water
Mensuration-rotary hanging plate the method for reason agent corrosion inhibition ", the dynamic analog test method used is chemical industry standard HG/
T2160-2008 " dynamic analogue test of cooling water method " and GB50050-2007 " Code for design of industrial recirculating cooling water treatment ".
Experimental result see table:
To compounding anti-incrustation corrosion inhibitor in standard GB/T/T23248-2009 " circularly-cooling sea water process design specification "
Performance requirement be: open type system medium carbon steel rate of corrosion should be less than 0.075mm/a, copper alloy and stainless rate of corrosion should
Less than 0.005mm/a, adhering to speed and should be less than 15mcm, above-mentioned experimental result has entirely reached the requirement of national standard, and excellent
In the requirement of national standard, the present invention is able to ensure that the system using sea water as recirculated cooling water, without the phenomenon such as fouling, corrosion, is protected
The stable operation of card system.And material therefor of the present invention is the environment-friendly materials of easily biological-degradable, belongs to low toxicity level industry and produce
Product, not pollution of marine environment, be a kind of efficient, economic without phosphorus, environmental protection, antibacterial type sea water water treatment agent.
Although the most only certain embodiments of the present invention be described in detail and illustrated, but for ability
For the technical staff in territory, it is clear that can under the premise of without departing from the spirit of the present invention the present invention be made various repairing
Change or change.In order to enable the invention to be effectively protected, it is all that claims appended hereto will attempt covering
Fall within the various amendments in spirit of the present invention or the technical scheme of change.
Claims (7)
1. a circularly-cooling sea water non-phosphorus scale and corrosion inhibitor, it is characterised in that be made up of the raw material of following percentage by weight:
。
Circularly-cooling sea water non-phosphorus scale and corrosion inhibitor the most according to claim 1, it is characterised in that by following weight hundred
The raw material of proportion by subtraction is made:
。
Circularly-cooling sea water non-phosphorus scale and corrosion inhibitor the most according to claim 1 and 2, it is characterised in that described carboxylic
Acids polymers is selected from poly-epoxy succinic acid, poly-aspartate, S-carboxyethyl sulfosuccinic acid, hydrolytic polymaleic anhydride, horse
Carry out one or more in anhydride-acrylic acid copolymer, acrylic acid-acrylic acid methyl ester-Hydroxypropyl acrylate copolymer.
Circularly-cooling sea water non-phosphorus scale and corrosion inhibitor the most according to claim 1 and 2, it is characterised in that described nothing
Machine corrosion inhibiter is sodium tungstate.
Circularly-cooling sea water non-phosphorus scale and corrosion inhibitor the most according to claim 1 and 2, it is characterised in that described has
Machine corrosion inhibiter is sodium gluconate.
6. a preparation method for the circularly-cooling sea water non-phosphorus scale and corrosion inhibitor described in claim 1 or 2, its feature exists
In, comprise the steps:
(1) successively carboxylic acids polymer and deionized water are put in reactor, stir 10 minutes under room temperature；
(2) from reactor, the carboxylic acids polymer of 80～120kg and the mixed solution of deionized water are released in open drum, to
Put into sodium tungstate in open drum, after stirring and dissolving, the mixed solution in open drum is put in reactor；
(3) successively organic inhibitor and BTA are added in reactor slowly, stir 30 minutes under room temperature；
(4) PAPE is put in head tank, after reactor is warming up to 40 DEG C, in reactor, drip polyhydric alcohol phosphorus
Acid esters, the temperature controlled in reactor during dropping is 40～50 DEG C, after dropping, stirs 30 points under conditions of 40～50 DEG C
Clock；
(5) reactor is cooled to less than 30 DEG C, hydroxyacetic acid is put in reactor, stir 30 minutes under room temperature, blowing, mistake
Filter and get final product.
7. an application process for the circularly-cooling sea water non-phosphorus scale and corrosion inhibitor described in claim 1 or 2, its feature exists
In, directly circularly-cooling sea water non-phosphorus scale and corrosion inhibitor is added in recirculated cooling water during use, addition be 30～
60mg/L。
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Cited By (8)
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| CN106976997A (en) * | 2017-03-28 | 2017-07-25 | 常州大学 | A kind of preparation method of corrosion inhibition type polymer antisludging agent |
| CN107698041A (en) * | 2017-10-25 | 2018-02-16 | 天津正达科技有限责任公司 | A kind of recirculating cooling water system corrosion inhibiting and descaling agent using desalinization water as moisturizing |
| CN109502773A (en) * | 2018-11-22 | 2019-03-22 | 国网天津市电力公司电力科学研究院 | A kind of environment-friendly type Circulating Cooling Water Treatment Agent Fit and preparation method |
| CN110144591A (en) * | 2019-06-11 | 2019-08-20 | 沈阳中科腐蚀控制工程技术中心 | A kind of sea and is sealed up for safekeeping with preservative and its production method at the pressure testing of pipe pigging |
| CN110201550A (en) * | 2019-06-24 | 2019-09-06 | 营口科林膜技术工程服务有限公司 | A kind of corrosion inhibiting and descaling agent for reverse osmosis membrane |
| CN111018139A (en) * | 2019-11-15 | 2020-04-17 | 嘉兴沃特泰科环保科技股份有限公司 | Preparation method of non-phosphorus scale inhibitor and filtering device thereof |
| CN112063247A (en) * | 2020-09-16 | 2020-12-11 | 新乡市聚星龙水处理有限公司 | Phosphorus-free prefilming agent for industrial circulating cooling water system and preparation method thereof |
| CN112680289A (en) * | 2020-12-25 | 2021-04-20 | 苏州禾川化学技术服务有限公司 | Carbon deposit cleaning agent for aviation engine and preparation method thereof |
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