96results about How to "Good scale inhibition" patented technology

An alkaline concentrated detergent composition for use in cleaning hard surfaces, medical instruments and other metal components (parts, tools, utensils, vessels, equipment) having superior cleaning efficacy at much lower alkali content than traditional alkaline cleaners and enhanced scale control properties even when diluted to about 1 / 40 ounce per gallon to about 1 / 10 ounce per gallon in potable water and even in exceptionally hard water. The inventive composition maintains its superior cleaning efficacy and scale control properties during use.

The invention discloses an ash water scale inhibitor as well as preparation and screening test methods thereof. the ash water scale inhibitor is prepared from raw materials in percentage by weight as follows: 2%-10% of HEDP, 10%-15% of 2-phosphonobutane-1,2,4-tricarboxylic acid, 20%-30% of a maleic acid-acrylic copolymer, 10%-20% of hydrolytic polymaleic anhydride, 5%-10% of an acrylic acid-hydroxypropyl acrylate copolymer, 5%-15% of a phosphono-carboxylic acid copolymer, 5%-10% of an acrylic acid-2-acrylamide-2-methyl propane sulfonic acid copolymer and the balance of purified water. The prepared ash water scale inhibitor has calcium resistance, pH resistance and high-temperature resistance, has good corrosion and scale inhabitation performance, has good scale inhibition and prevention effects and is applicable to ash water with water quality characteristics of high temperature, high alkali and high pH, particularly to a power plant ash removal system. The ash water scale inhibitor screened with the ash water scale inhibitor screening test method reaches the expected corrosion and scale inhabitation effects, and the hydraulic ash removal efficiency is improved.

The invention discloses a desulfurizer used for extraction of crude oil containing hydrogen sulfide and treatment of sewage containing hydrogen sulfide. The desulfurizer comprises, by mass, 25 to 40% of hydroxyethyl-hexahydro-s-triazine, 5 to 10% of micro-molecular alcohol, 1 to 2% of an osmotic agent sodium sulfosuccinate, 1 to 2% of acetic acid, 0.1 to 0.2% of sodium acetate and 0.02 to 0.04% of an antifoaming agent, with the balance being water, wherein the micro-molecular alcohol is methanol, or ethanol or a mixture of methanol and ethanol, and the antifoaming agent is a water-soluble polyether or silicone oil antifoaming agent. The desulfurizer provided by the invention has a simple formula, is intermiscible with water in any ratio and can effectively reduce hydrogen sulfide in crude oil or sewage; the desulfurizer rapidly reacts with hydrogen sulfide and a reaction product is soluble in water and does not block a pipeline; moreover, an s-triazine main agent has good scale-inhibition, anti-scale and sterilization properties; and the hydrogen sulfide removing agent in the invention overcomes the problems that an alcamine desulfurizer has rapidly reduced desulphurization efficiency at high temperature and hydrogen sulfide removed through reaction may be reversibly released again, and has a temperature application range of 0 to 120 DEG C.

The present invention relates to one kind of composite scale and corrosion inhibitor suitable for circular cooling water with high concentration multiple. The composite scale and corrosion inhibitor consists of amino acid 15-30 wt%, phosphonyl maleic anhydride polymer 5-20 wt%, acrylic acid-acrylate copolymer 5-15 wt%, humate 0.5-2.0 wt%, benzotriazole 0.5-2.0 wt%, organic phosphonate 5-15 wt% and hydroxide 8-15 wt%, except deionized water.

The invention discloses a microwave synthesis method for sulfonic group modified polyaspartic acid. The method comprises the following steps of: adding other sulfonate compounds containing amino groups into maleic anhydride and ammonia water or urea or ammonium salt which are taken main raw materials, radiating by using microwave with the power of between 200 and 800W to synthesize sulfonic groupmodified polysuccinimide, and further adding aqueous solution of inorganic base and hydrolyzing under microwave radiation conditions to obtain the sulfonic group modified polyaspartic acid. The sulfonic group modified polyaspartic acid prepared by the method has good functions of calcium carbonate and calcium phosphate scale inhibition and ferric oxide dispersion, and belongs to an environment-friendly circulating cooling water antiscale dispersant. The process is simple, synthesis speed is high, energy consumption is low, and the method is suitable for industrial production.

The invention discloses a composite scale and corrosion inhibitor. The composite scale and corrosion inhibitor contains carboxymethylinulin, cyclodextrin and / or a cyclodextrin derivative, and polyaspartic acid and / or polyepoxysuccinic acid at a weight ratio of (12-100):(2-25):(5-25). The invention also discloses applications of the composite scale and corrosion inhibitor in circulated cooling water treatment. The composite scale and corrosion inhibitor possesses excellent corrosion and scale inhibition comprehensive performance; and when the composite scale and corrosion inhibitor is applied to circulated cooling water treatment, requirements of circulated cooling water on scale and corrosion inhibition are satisfied, and environmental problems caused by phosphorus-containing chemicals in phosphorus-containing circulated cooling water are avoided.

The invention relates to the fields of industrial cooling water treating agent and water circular treatment, which provides a polymer containing a double-tracing group and a method for preparing the same. In the polymer, mixed water solution of an unsaturated fluorescence monomer containing trisulfonic acid, maleic anhydride, acrylic acid or itaconic acid, acrylamide or substituted acrylamide, an unsaturated monomer containing sulfonic acid and a non-ion monomer is subjected to copolymerization at a temperature of between 70 and 90 DEG C for 5 to 7 hours so as to obtain a single tracing copolymer with the side chain containing a trisulfonic acid tracing group; and the single tracing copolymer is added with 9-hydroxyxanthene and stirred under the conditions of avoiding light and room temperature for 40 and 60 hours, and is added with methanol for deposition, filtering and refinement, and the polymer containing the double-tracing group is obtained. Because the polymer contains two different structures of fluorescence groups, if the fluorescent background interference exists in the system, the concentration of the polymer can also be detected by another fluorescence group, and the concentration of the polymer in water can be quickly and accurately measured by the fluorescence or spectrophotometry, thereby improving the application range of the polymer.

The invention provides anti-scaling antifreezing fluid and a preparation method thereof, relating to the technical field of antifreezing fluid. The antifreezing fluid comprises the following components in parts by weight: 22-38 parts of ethylene glycol, 6-12 parts of calcium chloride, 1.5-5.5 parts of antiscales, 0.5-1.3 parts of sodium benzoate, 1.8-3.5 parts of triethanolamine, 0.5-1.2 parts of sodium dodecyl benzene sulfonate, 0.2-0.6 part of antifoaming agent and 20-35 parts of distilled water. The preparation method of the anti-scaling antifreezing fluid comprises the steps of weighing, mixing in sequence, ultrasonically stirring and filtering. The anti-scaling antifreezing fluid provided by the invention is alcohol water-based cooling fluid. The boiling point of the antifreezing fluid is increased and the freezing point is reduced through synergy of various substances, so that the anti-scaling antifreezing fluid has better anti-scaling and anti-corrosion properties while achieving better antifreezing property. The antifreezing fluid prepared according to the preparation method provided by the invention has stable quality and can be stored and used for a long term. The preparation method is simple in process and is easy and fast.

The invention relates to the fields of scale and corrosion inhibition and circulating water treatment, and discloses a compound scale and corrosion inhibitor; the compound scale and corrosion inhibitor contains water soluble chitosan and / or a derivative thereof, a plant natural high-molecular compound and / or a derivative thereof and polyaspartic acid and / or polyepoxysuccinic acid. In the compound scale and corrosion inhibitor, the weight ratio of water soluble chitosan and / or the derivative thereof to the plant natural high-molecular compound and / or the derivative thereof to polyaspartic acid and / or polyepoxysuccinic acid is (2-20) to (2-25) to (5-25). The invention also discloses an application of the compound scale and corrosion inhibitor in treatment of circulating cooling water. The compound scale and corrosion inhibitor provided by the invention has good scale and corrosion inhibition performance, is applied to the circulating cooling water, can meet the requirements of scale and corrosion inhibition of the circulating cooling water, and also can avoid environmental problems caused by phosphorus-containing drugs in phosphorus-containing circulating cooling water.

The invention discloses a water treatment pharmaceutical composition and an application thereof. The water treatment pharmaceutical composition contains amino acids having a scale and corrosion inhibition function, tetracycline antibiotics having sterilization functions, and an enzyme for playing a synergistic effect on the amino acids and antibiotics. The invention further discloses an application of the water treatment pharmaceutical composition in water treatment. A performance estimation result of the pharmaceutical composition indicates that the scale inhibition rate of calcium carbonate scale inhibition is larger than 99%, the corrosion rate of a dynamic simulation test is 0.024 mm / a, and the minimum number of heterotrophic bacteria within 72h can reach 1.4*10<2> pieces / ml. The water treatment pharmaceutical composition is low in dosage, free of phosphorus, strong in scale inhibition ability, good in corrosion inhibition, good in sterilization effect and long in duration.

The invention provides a high-effective composite corrosion and scale inhibitor which includes following components, by mass, 8-18 parts of polyhydric alcohol phosphate ester, 5-15 parts of hydroxyethidene diphosphonic acid, 10-20 parts of phosphor carboxylic acid copolymer, 5-15 parts of zinc sulfate, 0.1-0.5 parts of copper corrosion inhibitor, 10-20 parts of a high-effective dispersing agent, 1-3 parts of a co-solvent and 10-60 water. The corrosion and scale inhibitor is suitable for water quality of high hardness, high alkalinity and strong scaling property and achieves excellent scale and corrosion inhibition performance. The corrosion and scale inhibitor is free of inorganic phosphate so that calcium phosphate scale precipitation is prevented. The corrosion and scale inhibitor is free of toxic substances, such as chromate, so that the corrosion and scale inhibitor is pollution-free and is beneficial to environmental protection. The corrosion and scale inhibitor is low in cost, is easy to compound, is good in stability and is less in use amount. An excellent synergy is achieved among the components, so that the corrosion and scale inhibitor is stable in performance and excellent in performance.

The invention relates to biological organic fertilizer containing eucommia bark powder. Wheat straw, chicken manure and sheep manure are reutilized, Chinese herbal medicine is further added for fermentation, the utilization value of raw materials is increased, the biological organic fertilizer contains rich active organic ingredients and can activate soil, beneficial microorganisms are increased, and accordingly, the crop yield is remarkably increased. Alkaline substances and other active substances in traditional Chinese medicine can damage cell membranes and has a good inhibition function on bacteria as well as repellant and breeding inhibition functions on pests.

The invention relates to a water quality stabilizer, in particular to an environment-friendly water quality stabilizer which is prepared from the following raw materials in parts by weight: 25-35 parts of polyaspartic acid, 30-45 parts of polyacrylate sodium, 20-40 parts of gluconic acid sodium salt and 60-80 parts of water. The water quality stabilizer with a scenic and reasonable formula and favorable scale and corrosion inhibition property, which takes the polyaspartic acid as the main raw material, is biodegradable, environment-friendly and less in dosage and belongs to a degradable substance. The water quality stabilizer also has favorable scale and corrosion inhibiting, algae and mud separating and bacteriostasis effects, is free from pollution during pollution discharge, can replace the traditional water quality stabilizer, save resources and improve the capacity, and can be widely applied to circulating cooling water in the industries such as chemical industry, electric power, refrigeration, central air-conditioning, metallurgy, machinery and injection molding.

The invention discloses a low-phosphorus water treatment agent composition. The composition contains a benzamide bactericide, an organic phosphonic acid corrosion inhibitor and a sulfonic group-containing copolymer. The invention also discloses an application of the low-phosphorus water treatment agent composition in industrial circulating cooling water treatment. The assessment result of the water treatment performance of the composition shows that a small dosage of the composition has high calcium carbonate scale inhibition rate, high zinc inhibition rate, high sterilization rate and slow carbon steel sheet corrosion rate in water treatment. The above low-phosphorus water treatment agent has the advantages of good water treatment effect, small dosing amount and low phosphorus content.

The invention discloses a low-phosphorus high-efficiency corrosion and scale inhibitor and an application thereof in scale inhibition of industrial circulating cooling water. The corrosion and scale inhibitor contains the following effective components in parts by weight: 1-3 parts of an organic phosphonic acid corrosion and scale inhibitor, 3-6 parts of low-phosphorus or phosphorus-free scale inhibitor, 3-8 parts of a sulfonic acid type polymer scale inhibitor, and 1-3 parts of a zinc salt. The corrosion and scale inhibitor has excellent CaCO3 scale resistance, Ca3(PO4)2 scale resistance and corrosion inhibition rate when the industrial circulating water having water quality conditions of Ca<2+> of 120 mg / L, Cl<-> of 60 mg / L and the alkalinity of 110 mg / L is concentrated to 3-6 times, the drug total content is 8-20 ppm, and the phosphorus content is less than 0.5 ppm.

The invention provides a novel green environmentally-friendly anti-scaling filtering material and a preparation method thereof. The novel green environmentally-friendly anti-scaling filtering materialcomprises 30-50wt.% of powdered attapulgite with 200-600 meshes, 35-45wt.% of powdered humic acid with 200-600 meshes, 5-10% of powdered montmorillonite with 200-600 meshes, 10-15wt.% of powdered zeolite, and 40-60wt.% of a liquid adhering agent. According to the novel green environmentally-friendly anti-scaling filtering material, the raw materials collaborate with each other, so that the novelgreen environmentally-friendly anti-scaling filtering material is free from phosphorus, nontoxic, and nuisanceless, can be completely biologically degraded, is high in adhesion capacity, shows extremely high chelating capacity to ions, and is high in corrosion inhibition function, anti-scaling function, bacteria inhibiting function, smell removing function and other performance; powder is hard tofall off and dissolving is greatly prevented during use; the strength is high; and the novel green environmentally-friendly anti-scaling filtering material can be widely applied to the fields of industrial water treatment, seawater desalting, and the like; the environment is protected; and the cost is low.

The invention provides a super-branched chain reverse osmosis scale inhibitor with a net structure. The super-branched chain reverse osmosis scale inhibitor is characterized by being prepared from substances containing the following components: the mass ratio of an acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer to a mixture of polyamino polyether methylene phosphonate and organic phosphine derivatives to tricarboxylic acid is (2-2.5):1:(0.5-1); the mass of water is 1-1.5 times as much as the sum of masses of the acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer, the mixture of polyamino polyether methylene phosphonate and organic phosphine derivatives and tricarboxylic acid; the mass of a crosslinking agent is 0.5-1% of the mass of the water; and the concentration of an organic acid catalyst in the water is 0.5-1 mol / L. A scale inhibitor is capable of effectively preventing carbonate, sulfate, metal oxide and silicon dioxide from blocking a reverse osmosis membrane and effectively realizing sterilization.

The invention relates to a solid corrosion and scale inhibitor and a processing method thereof, and belongs to the technical field of oil-water well scale prevention. The solid corrosion and scale inhibitor comprises the following components in parts by weight: 30 to 35 parts of imidazoline quaternary ammonium salt, 8 to 10 parts of organic phosphoric acid, 1-3 parts of fungicide, 0.5-1 part of dispersant, and 20-30 parts of water. The processing method comprises the following step of evenly dispersing the imidazoline quaternary ammonium salt, the organic phosphoric acid and the fungicide in the dispersant of the network structure to form a solid block. A long-acting slow-release mechanism is that the dissolution rate of an oil-soluble slow-release regulator with a network structure achieves slow and stable release, so that the imidazoline quaternary ammonium salt and the organic phosphoric acid are uniformly dispersed in an oil-water mixture in a shaft to form the scale inhibitor withcomprehensive effects of slow release, scale inhibition and sterilization, and the user performance is high..

The invention discloses a circulating water phosphorus-free corrosion and scale inhibitor and a preparation method thereof, and belongs to the technical field of water treatment agent preparation. Thecorrosion and scale inhibitor comprises the following components in parts by weight: 10-20 parts of polyepoxysuccinic acid or polyaspartic acid, 10-35 parts of sodium gluconate, 10-20 parts of acrylic acid-2-acrylamide-2-methyl propane sulfonic acid copolymer, 5-10 parts of zinc salt, 3-15 parts of molybdate, 1-3 parts of a copper corrosion inhibitor, 1-2 parts of a fluorescent tracer, 1-2 partsof a pH regulator, 5-10 parts of isothiazolinone and the balance of water. The phosphorus-free corrosion and scale inhibitor has the advantages of high corrosion inhibition rate, high scale inhibitionrate, low cost, no phosphorus, wide scale inhibition spectrum, wide pH application range, sterilization and slime stripping effects, low toxicity, chloride resistance, simple operation, controllablecirculating water agent concentration, safety and high efficiency, and belongs to an environment-friendly corrosion and scale inhibitor.

The invention discloses a low-phosphorous scale and corrosion inhibitor and a preparation method thereof, and belongs to the technical field of water treatment agents and preparation thereof. The low-phosphorous scale and corrosion inhibitor is characterized in that the low-phosphorous scale and corrosion inhibitor is prepared from the following components in percentage by mass: 8-15% of hydrochloric acid, 1-6% of zinc salt, 30-40% of carboxylic acid-sulfonic acid-acrylate terpolymer, 8-10% of 2-phosphonobutane-1,2,4-tricarboxylic acid, 20-30% of hydrolyzed polymaleic anhydride and the balanceof water, wherein the hydrochloric acid is industrial hydrochloric acid with a concentration of 31% by mass. The low-phosphorous scale and corrosion inhibitor disclosed by the invention has the advantages of low phosphorous, environmental friendliness, adaptability to high pH value, high temperature and harsh water quality conditions and perfect effect of scale inhibition and corrosion retarding.The invention correspondingly discloses the preparation method of the low-phosphorous scale and corrosion inhibitor, wherein the preparation method has the advantages that the process steps are simple and the obtained low-phosphorous scale and corrosion inhibitor has low phosphorous and environmental friendliness, adaptability to high temperature and harsh water quality conditions and perfect effect of scale inhibition and corrosion retarding.

A method for preparing the water treating agent ployepoxide sulfonic carboxylic acid of biodegradable, with the characteristics being: employing epichlorohydrin and bisulfate with molar ratio being 1:1-1:1.5 as raw material, synthesing intermediate compound under action of phase transition catalyst alcohol isopropylicum with its consumption being 1-20% of that of total reactant and nitrogen, the intermediate compound without separation directly polymerizing with epoxide succinic acid under the catalytic action of rare-earth metal catalyst such as Ba and Sr with its consumption being 0.1-1% of that of total reactant and getting the ployepoxide sulfonic carboxylic acid or its salt solution.

The invention relates to a preparation process of a disease-resistant and pest-resistant fertilizer containing eucommia ulmoides powder. According to the preparation process, wheat straw, chicken manure and sheep manure are reused, and Chinese herbal medicines are added for fermentation, so that the values in use of raw materials are increased; the disease-resistant and pest-resistant fertilizer is rich in active organic ingredients, so that soil can be activated; the amount of beneficial microorganism is increased, so that the crop yield is increased effectively. Alkaline substances and other active substances in traditional Chinese medicines can damage cytomembranes, so that a good inhibiting effect on germs is achieved, and meanwhile, the disease-resistant and pest-resistant fertilizer has the effects of repelling and inhibiting breeding on pests.

The invention belongs to the technical field of petrochemical industry, and particularly relates to a high-temperature-resistant oil slurry scale inhibitor. The oil slurry scale inhibitor is mainly used for preventing scaling of an oil slurry system of a device and the bottom of a fractionation tower. The oil slurry scale inhibitor comprises, by mass, 10%-35% of a detergent dispersant, 0.1-5% of an amine type antioxidant, 0.1%-5% of a hydrogen supply type antioxidant, 0.1-2% of a metal passivator and the balance solvent. The oil slurry scale inhibitor has good high temperature resistance and still has good oxidation resistance at 370-420 DEG C. The detergent dispersant does not contain sulfur or phosphorus, and has good scale inhibition and scale removal effects. The freezing point of thehigh-temperature-resistant oil slurry scale inhibitor is low (<=-20 DEG C), and the storage tank of the high-temperature-resistant oil slurry scale inhibitor does not need heat insulation during the winter. When 30-200 ppm of the oil slurry scale inhibitor is added, the problem of pressure drop increasing caused by the coking of the bottom of the fractionation tower and the problem of plugging caused by scaling of an oil slurry heat exchanger, a pipeline and the like can be effectively solved; the oil slurry scale inhibitor guarantees long-term operation of the device and has great economic benefits.

The invention belongs to the field of chemical engineering, relates to water treatment agents, and in particular relates to a water treatment agent and a preparation method thereof. The water treatment agent is prepared from the following raw materials: sodium humate, ethylenediaminetetraacetic acid, sodium hexametaphosphate, zinc sulfate, sodium hypochlorite, hydroxy ethidene diphosphonic acid, polymaleic anhydride and water. The preparation method of the water treatment agent comprises the following steps: on the basis of a sodium humate type, performing grafted chelating reaction, and grafting into a corrosion inhibition group so as to realize a corrosion inhibition function of the agent; then performing compound reaction, filtering, adsorbing and decoloring, thereby solving the problems that a sodium humate type water treatment agent is serious in corrosion and circulating water is blackened, enabling the sodium humate type water treatment agent to achieve good effects of inhibiting scales, slowing down scales and inhibiting the breeding of bacteria and algae, and a large amount water does not need to be drained.

The invention discloses a scale and corrosion inhibitor used for a hydrogenation device and a synthesis method thereof. The scale and corrosion inhibitor is characterized by comprising the following components in percentage by weight: A, 25 to 40 percent of film-forming amine compound; B, 10 to 20 percent of neutral amine mixture; C, 10 to 15 percent of dispersion component; and D, 10 to 40 percent of compound solvent. The synthesis method comprises the following steps: firstly, adding A and D, heating the mixture for 30 minutes under the condition of stirring, then adding the rest componentsinto the mixture respectively, and stirring the mixture for 2 hours to form the scale and corrosion inhibitor. When the adding amount of the scale and corrosion inhibitor is 5 to 15ppm of medium flow, the generation of corrosion and salt scale can be effectively inhibited; and the full water-soluble formulation of the scale and corrosion inhibitor is directly discharged along with washing, and has no adverse effect on subsequent oils.

The invention discloses a calix[4]arene derivative shown in a formula I and further discloses a preparation method and application of the calix[4]arene derivative, a non-phosphorus scale inhibition, dispersion and corrosion inhibition agent, and application of the non-phosphorus scale inhibition, dispersion and corrosion inhibition agent as a water treatment agent for circulating cooling water. The non-phosphorus scale inhibition, dispersion and corrosion inhibition agent provided by the invention is especially suitable for circulating cooling water with the calcium hardness and total alkalinity smaller than or equal to 1,600 mg / L, so that the upper limits of the indexes are increased by 500 mg / L, a wider application range is achieved, the concentration multiple of circulating cooling water is increased, and the purposes of water saving and carbon emission reduction are achieved. The non-phosphorus scale inhibition, dispersion and corrosion inhibition agent provided by the invention has favorable scale inhibition and corrosion inhibition effects, can effectively avoid scaling, corrosion and / or the like of a heat exchanger caused by low flow velocity, long retention time of circulating cooling water, temperature rise greater than a design value and the like, is nonnitrogenous and environment-friendly, avoids secondary pollution to water and solves the eutrophication problem of water. The formula I is figured above.

The invention discloses a composite scale and corrosion inhibitor. The composite scale and corrosion inhibitor contains carboxymethylinulin, a soluble inorganic salt corrosion inhibitor, and a carboxylic acid-containing polymer scale inhibitor dispersing agent at a weight ratio of (12-100):(2-25):(10-50). The invention also discloses applications of the composite scale and corrosion inhibitor in circulated cooling water treatment. The composite scale and corrosion inhibitor possesses excellent corrosion and scale inhibition comprehensive performance; and when the composite scale and corrosion inhibitor is applied to circulated cooling water treatment, requirements of circulated cooling water on scale and corrosion inhibition are satisfied, and environmental problems caused by phosphorus-containing chemicals in phosphorus-containing circulated cooling water are avoided.

The invention relates to a phosphorus-free treatment agent for boiler water as well as preparation and application of the treatment agent. The treatment agent is prepared from the following raw material components in percentages by mass: 16-30% of modified polyaspartic acid, 10-20% of N-(3,4-dihydroxyphenethyl)acrylamide, 10-16% of a pH regulator, 3-8% of a deoxidant, 2-6% of a film-forming auxiliary agent, and the balance of deionized water. The treatment agent is prepared by the following steps: adding the deionized water into a reaction kettle according to the mass percentage content, adding the modified polyaspartic acid and the N-(3,4-dihydroxyphenethyl)acrylamide, performing full and uniform stirring, sequentially adding the deoxidant, the film-forming auxiliary agent and the pH regulator, performing heating to 50-65 DEG C, performing constant-temperature stirring for 20-30 min, and performing natural cooling to room temperature to obtain the treatment agent. In practical application, when the treatment agent is prepared, the components are calculated and added according to an actual water volume of a boiler, and the addition amount is 10-20 g / t. Compared with the prior art,the treatment agent provided by the invention is applied to medium and high-pressure boiler water systems, overcomes various negative effects caused by the use of a phosphate, reduces the blowdown rate of the boiler, saves energy, and has a good application prospect.

The invention discloses a salt-production scale inhibitor. Specifically, the salt-production scale inhibitor is prepared from organic phosphonic acid (or organic phosphonate), a terpolymer, a phosphono carboxylic acid copolymer, a unary polymer, caustic soda flakes and deionized water, wherein the phosphono carboxylic acid copolymer has both carboxylic acid groups and phosphonic acid groups, the terpolymer can be a carboxylate-sulfonate-nonionic copolymer with the molecular weight being 3000-5000, and the unary polymer can be one or a combination of polyacrylic acid and hydrolyzed polymaleic anhydride. According to the salt-production scale inhibitor provided by the invention, monomers have good synergism, the efficient chelating scale-inhibition effect of organophosphorus, and the high thermal-stability and good dispersion effect of the polymers are achieved, the chlorine resistance is high, and the chemical stability is good; when the using concentration is 10-20 mg / L, the salt-production scale inhibitor shows good scale inhibition and scale removal performance on salts such as calcium sulfate and calcium carbonate, which are liable to form scale; the salt-production scale inhibitor is wide in application range, the service cycle of equipment can be effectively prolonged, and the production efficiency is improved.

The invention discloses a high efficiency scale and corrosion inhibitor for treating industrial circulating cooling water. The high efficiency scale and corrosion inhibitor comprises, by weight, 8-10 parts of 2-phosphonic butane-1, 2, 4-tricarboxylic acid, 8-10 parts of polyamino polyether methylene phosphonates, 8-10 parts of etidronic acid, 8-10 parts of DTPMPA, 6-8 parts of 2-hydroxyphosphonoacetic acid, 6-8 parts of acrylic-HPA-AMPS terpolymer, 6-8 parts of hydrolyzed polymaleic anhydride, 10-12 parts of zinc sulfate heptahydrate, and 1-2 parts of methylbenzotriazole. The corrosion rate of stainless steel and brass is not more than 0.0006mm / a, which is far superior to the standard of 0.005 mm / a, and the scale inhibition rate is up to 98%. The inhibitor has excellent scale inhibition and corrosion resistance, and also has the effect in dispersing water-contained oxides and organic scale in poor-quality water. It also can effectively prevent formation of scale, and microbial clay, and thus has a good scale effect and a significant solubility limit effect.