CN106745858B - Method for treating circulating cooling water with high chloride ion content of 3000-100000 mg/L - Google Patents
Method for treating circulating cooling water with high chloride ion content of 3000-100000 mg/L Download PDFInfo
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Abstract
Circulation for treating high chloride ion content of 3000-100000 mg/LThe corrosion and scale inhibitor used in the method for cooling water circularly comprises a liquid part and a solid part, wherein the liquid part comprises the following components in percentage by weight: 10-30% of organic phosphonic acid, 10-30% of organic carboxylic acid, 10-25% of substances with the functions of scale inhibition, corrosion inhibition and dispersion and the balance of water; the solid part comprises the following components in percentage by weight: 15-35% of tannin extract, 20-35% of fulvic acid, 0-5% of sodium hydroxide and the balance of sodium salt. The liquid portion and the solid portion are added in the make-up water through an applicator. The invention is to Cl in the circulating water‑High tolerance of content in Cl‑When the content is 3000 mg/L-100000 mg/L, the scale inhibition rate, the metal corrosion rate and the bacterial and algae breeding rate required by the design specification of industrial circulating cooling water can be met, meanwhile, the concentration multiple is naturally balanced, the system operates in zero discharge, no waste water is discharged, and the investment and operating cost of sewage treatment facilities are greatly reduced.
Description
Technical Field
The invention relates to a method for treating circulating water, in particular to a method for treating circulating cooling water with high chloride ion content of 3000-100000 mg/L.
Background
In reality, some groundwater contains Cl-The chloride ion concentration is more than 150mg/L, namely more than 700mg/L, the reverse osmosis method has large investment, high water production cost, no place for concentrated water, waste of water resources, large investment by adopting an ion exchange desalination process, high operation requirement and backwashing water pollution.
The inventors searched the following related patent documents: CN101125715A discloses a composite corrosion and scale inhibitor for treating circulating water with high concentration factor, which comprises a liquid part and a solid part, wherein the weight percentages of the components are 5-40% of organic phosphonic acid, 5-40% of organic carboxylic acid and 20-90% of water, based on 100% of the total weight of the liquid part; the weight percentage of each component is 5-35% of the total weight of the polymer with the scale inhibition effect, 45-80% of an alkaline agent, 1-10% of azole and 1-10% of zinc salt, wherein the total weight of the solid part is 100%; the use concentration of the liquid part and the solid part in the circulating water is as follows: the dosage of the supplementing water is 20-200 mg/L, and the liquid part is as follows: maintaining the total phosphine content in the circulating water to be 10-15 mg/L. CN103739093A discloses a ternary polymerization type corrosion and scale inhibitor for circulating cooling water of a central air conditioner, which consists of tourmaline, polyaspartic acid, polyepoxysuccinic acid, polymaleic acid, hydroxyethylidene diphosphonic acid, zinc salt and the like. Wherein the dosage of the tourmaline is 5-500 g/t (calculated by solid), the dosage of the polyaspartic acid, polyepoxysuccinic acid, polymaleic acid and hydroxyethylidene diphosphonic acid is 2-60 g/t (calculated by liquid), and the dosage of the zinc salt is 0.2-0.8 g/t. CN105271536A discloses a high-temperature, high-alkali, high-hardness and high-pressure grey water dispersion scale inhibitor and a preparation method thereof, wherein the dispersion scale inhibitor is composed of 20 parts of amino trimethylene phosphonic acid, 15 parts of trimethylene triphosphonic acid-ethylenediamine-nitrogen-hydroxypropyl sulfonic acid, 30 parts of hydroxy ethylidene diphosphonic acid, 17 parts of hydrolyzed polymaleic anhydride, and 10-18 parts of zinc salt and water. CN105502704A discloses a composite corrosion and scale inhibitor which is a liquid preparation and is formed by mixing two liquid preparations A and B according to the proportion of 1:1, wherein: the liquid preparation A is a composite preparation consisting of organic phosphonic acid, polycarboxylic acid, a dispersant and water; the liquid preparation B is a composite preparation prepared from a solid medicament and water according to the weight ratio of 1:1, wherein the solid medicament is a composite preparation of a polymer with a scale inhibition effect, an alkaline agent, azole and zinc salt. CN101607766A discloses a preparation method of a corrosion and scale inhibitor for high-alkali high-chlorine circulating cooling water, which comprises the following steps: 23-25 parts of polyepoxysuccinic acid, 23-25 parts of 2-phosphonic butane-1, 2, 4-tricarboxylic acid, 12-15 parts of corrosion inhibition synergist, 10-15 parts of sodium gluconate, 5-8 parts of alkyl epoxy carboxylate, 2-3 parts of benzotriazole and 10-20 parts of pure water.
The technologies can meet the technical index requirements of scale inhibition rate, metal corrosion rate and bacterial and algae breeding rate required by GB50050-2007 design Specification for industrial circulating cooling water, and no specific guidance scheme is given.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for treating circulating cooling water with high chloride ion content, wherein the circulating cooling water with high chloride ion content is treated by a corrosion and scale inhibitor for Cl in the circulating water-High tolerance of (chloride ion) content in Cl-When the content is 3000 mg/L-100000 mg/L, the scale inhibition rate, the metal corrosion rate and the bacteria and algae breeding rate required by GB50050-2007 design Specification for industrial circulating cooling water can be achievedThe method has the advantages of meeting the requirement of technical indexes, naturally balancing concentration times, realizing zero-discharge operation of the system, avoiding wastewater discharge and greatly reducing the investment and operating cost of sewage treatment facilities.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for treating circulating cooling water with high chloride ion content of 3000-100000 mg/L is characterized in that a corrosion and scale inhibitor comprises a liquid part and a solid part, wherein:
the liquid part is a composite preparation of organic phosphonic acid, organic carboxylic acid, substances with the functions of scale inhibition, corrosion inhibition and dispersion and water, and the liquid part comprises the following components in percentage by weight based on 100 percent of the total weight of the liquid part: 10-30% of organic phosphonic acid, 10-30% of organic carboxylic acid, 10-25% of substances with the functions of scale inhibition, corrosion inhibition and dispersion and the balance of water. The solid part is a composite preparation of tannin extract, fulvic acid, sodium hydroxide and sodium salt, and the weight percentages of the components of the solid part are as follows based on 100 percent of the total weight of the solid part: 15-35% of tannin extract, 20-35% of fulvic acid, 0-5% of sodium hydroxide and the balance of sodium salt.
The organic phosphonic acid is selected from hydroxyethylidene diphosphonic acid and diethylenetriamine pentamethylene phosphonic acid
(DTPMPA) and polyamine polyether methylene Phosphonic Acid (PAPEMP); the organic carboxylic acid is selected from one or two of 2-phosphonic acid butane-1, 2, 4-tricarboxylic acid (PBTCA), acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (AA/AMPS), N-containing polycarboxylic acid (NDA) and phosphine hydrolyzed polymaleic anhydride (PPMA); the substances with the functions of scale inhibition, corrosion inhibition and dispersion are selected from one or two of poly-epoxy sodium succinate (PESA) and phosphine sulfonic acid; the sodium salt is selected from one or two of sodium carbonate, trisodium phosphate, disodium hydrogen phosphate, sodium nitrite and sodium tripolyphosphate.
In the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 100-300 g/ton make-up water, liquid part: 50-400 g/ton make-up water (adding and reducing according to make-up water quality).
In the above technical scheme, the preferable scheme of the corrosion and scale inhibitor for circulating cooling water with high chloride ion content of 3000-100000 mg/L may be that the weight percentages of the components of the liquid part are as follows, based on 100% of the total weight of the liquid part: 15-20% of hydroxyethylidene diphosphonic acid, 10-15% of 2-phosphonic butane-1, 2, 4-tricarboxylic acid (PBTCA), 10-15% of N-element-containing polycarboxylic acid (NDA), 15-20% of polyepoxy sodium succinate (PESA) and the balance of water; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: 20-25% of tannin extract, 20-25% of fulvic acid, 2-5% of sodium hydroxide and the balance of sodium salt; the sodium salt is a combination of sodium carbonate and trisodium phosphate, and the weight ratio of the sodium carbonate to the trisodium phosphate is 1: 0.5. in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 150 g/ton make-up water, liquid fraction: 100 g/ton make-up water.
In the above technical scheme, the preferable scheme of the corrosion and scale inhibitor for circulating cooling water with high chloride ion content of 3000-100000 mg/L may further include that the weight percentages of the components of the liquid part are as follows, based on 100% of the total weight of the liquid part: 15-25% of diethylenetriamine pentamethylene phosphonic acid (DTPMPA), 20-30% of N-containing polycarboxylic acid (NDA), 10-25% of phosphine sulfonic acid and the balance of water; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: 15-20% of tannin extract, 25-30% of fulvic acid, 1-5% of sodium hydroxide and the balance of sodium salt; the sodium salt is the combination of sodium tripolyphosphate and sodium nitrite, and the weight ratio of the sodium tripolyphosphate to the sodium nitrite is 1: 0.5. in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 100 g/ton make-up water, liquid fraction: 200 g/ton make-up water.
In the above technical scheme, the preferable scheme of the corrosion and scale inhibitor for circulating cooling water with high chloride ion content of 3000-100000 mg/L may further include that the weight percentages of the components of the liquid part are as follows, based on 100% of the total weight of the liquid part: 10-15% of polyamine polyether methylene Phosphonic Acid (PAPEMP), 20-30% of organic carboxylic acid, 10-20% of polyepoxy sodium succinate (PESA) and the balance of water; the organic carboxylic acid is a combination of phosphine hydrolyzed polymaleic anhydride (PPMA) and N-element-containing polycarboxylic acid (NDA), and the weight ratio of the phosphine hydrolyzed polymaleic anhydride (PPMA) to the N-element-containing polycarboxylic acid (NDA) is 1: 0.5; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: 15-20% of tannin extract, 25-30% of fulvic acid, 0.5% of sodium hydroxide and the balance of sodium salt; the sodium salt is a combination of sodium carbonate and trisodium phosphate, and the weight ratio of the sodium carbonate to the trisodium phosphate is 1: 0.8. in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 150 g/ton make-up water, liquid fraction: 300 g/ton make-up water.
Arranging a medicine feeder in the supplementing water, adding the prepared liquid part and solid part into the supplementing water through the medicine feeder, wherein the medicine feeder is provided with a spherical first cavity body, a spherical second cavity body, a first medicine feeding pipe, a second medicine feeding pipe, a plurality of first medicine liquid pipes which are fixed on the first cavity body and are used for communicating the outside with the inside of the first cavity body, a plurality of second medicine liquid pipes which are fixed on the second cavity body and are used for communicating the outside with the inside of the second cavity body, a first supporting leg for supporting the first cavity body, and a second supporting leg for supporting the second cavity body, the lower end of the first medicine liquid pipe is communicated with the middle part of the first cavity body, the lower end of the second medicine liquid pipe is communicated with the middle part of the second cavity body, the solid part is placed into the first cavity body, the liquid part is placed into the second cavity body, and the number of the first medicine liquid pipes is the same as that of the second medicine liquid pipes, the inner diameter of the round hole of each first medicine liquid pipe is 1.5-2.0 times of the inner diameter of the round hole of each second medicine liquid pipe, the closest distance H between the first medicine liquid pipe and the second medicine liquid pipe is 8-15 cm, and the medicine adding port of the first medicine liquid pipe and the medicine adding port of the second medicine liquid pipe are both positioned on the surface of the supplementing water.
The preparation method of the liquid part (composite preparation) comprises the steps of sequentially adding water, organic phosphonic acid, organic carboxylic acid and substances with the functions of scale inhibition, corrosion inhibition and dispersion into a container (a reaction kettle) according to the weight percentage, and uniformly mixing and stirring to obtain the composite preparation of the liquid part. The preparation method of the solid part (composite preparation) comprises the steps of sequentially adding the tannin extract, the fulvic acid, the sodium hydroxide and the sodium salt into a container (a reaction kettle) according to the weight percentage, mixing and uniformly stirring to obtain the solid part composite preparation.
All the components selected by the invention are commodities sold in the market.
According to the requirements of GB50050-2007 design Specification for Industrial circulating Cooling Water, the water running pipe length is 700mg/L at most, and in practical application and experiments, Cl in circulating water-Content (wt.)>When the corrosion and scale inhibitor is used in circulating cooling water at 3000mg/L, the corrosion and scale inhibitor can reach the metal corrosion rate specified in GB50050-2007 design Specification for industrial circulating cooling water: carbon steel less than 0.075 mm/year, copper<0.005 mm/year, stainless steel<0.005 mm/year, no metal pitting, calcium carbonate scale resistance rate of more than 90 percent and calcium phosphate scale resistance rate of more than 89 percent, and meets the national standard requirements. The invention has no pollution, no investment, no waste water and zero discharge operation when being used for treating circulating water, and can directly replace the original medicament with the medicament. The invention can treat Cl-Circulating cooling water with the content of 3000 mg/L-100000 mg/L.
For example: the water quality of comprehensive make-up water is as follows: total hardness of 20mg-n/L and total alkalinity of 10mg-n/L, CL-500mg/L、PH7.8、Ca2+12mg-n/L, make-up water of circulating water, and the concentration multiple K =15 times after zero discharge operation concentration, at the moment, Cl in the circulating water-The content reaches 7500mg/L, and after the invention is used, the corrosion rate of the system metal material is as follows: carbon steel is 0.003-0.075 mm/year, and copper is 0.002-0.005 mm/year; stainless steel 0.0001-0.0003 mm/year, no pitting, calcium carbonate scale inhibiting rate higher than 85%, calcium phosphate scale inhibiting rate higher than 88%, and no bactericide.
For another example: the water quality of comprehensive make-up water is as follows: total hardness of 18mg-n/L and total alkalinity of 12mg-n/L, CL-680mg/L、PH7.9、Ca2+15mg-n/L, make-up water of circulating water, and the concentration multiple K =15 times after zero discharge operation concentration, at the moment, Cl in the circulating water-The content reaches 10200mg/L, and after the invention is used, the corrosion rate of the system metal material is as follows: carbon steel is 0.035-0.075 mm/year, and copper is 0.0025-0.005 mm/year; stainless steel 0.0001-0.0003 mm/year, no pitting, calcium carbonate scale inhibiting rate of more than 87 percent, calcium phosphate scale inhibiting rate of more than 87 percent, and no bactericide is used.
In conclusion, the corrosion and scale inhibitor is used for treating the circulating cooling water with high chloride ion content, and the corrosion and scale inhibitor treats Cl in the circulating water-High tolerance of (chloride ion) content in Cl-When the content is 3000 mg/L-100000 mg/L, the scale inhibition rate, the metal corrosion rate and the bacterial and algae breeding rate required by GB50050-2007 design Specification for industrial circulating cooling water can be met, meanwhile, the concentration multiple is naturally balanced, the system runs in a zero-emission mode, no waste water is discharged, and the investment and the running cost of sewage treatment facilities are greatly reduced. Generally, no bactericidal algicide is used, no pre-film is used, the operation is stable, the economic and feasible effects are achieved, and the economic benefit and the social benefit are remarkable.
Drawings
Fig. 1 is a schematic view of a dispenser used in the present invention.
Detailed Description
Example 1: the corrosion and scale inhibitor for the circulating cooling water with high chloride ion content comprises a liquid part and a solid part, wherein: the weight percentages of the components of the liquid part are as follows based on the total weight of the liquid part being 100 percent: 18% of hydroxyethylidene diphosphonic acid, 12% of 2-phosphonic butane-1, 2, 4-tricarboxylic acid (PBTCA), 10% of N-containing polycarboxylic acid NDA, 16% of sodium Polyepoxysuccinate (PESA) and the balance of water. The weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: tannin extract 22%, fulvic acid 21%, sodium hydroxide 2% and sodium salt in balance; the sodium salt is a combination of sodium carbonate and trisodium phosphate, and the weight ratio of the sodium carbonate to the trisodium phosphate is 1: 0.5.
the preparation method of the liquid part (composite preparation) comprises the steps of sequentially adding water, hydroxyethylidene diphosphonic acid, 2-phosphonic acid butane-1, 2, 4-tricarboxylic acid (PBTCA), N-containing polycarboxylic acid (NDA) and sodium Polyepoxysuccinate (PESA) into a container (a reaction kettle) according to the weight percentage, and mixing and stirring uniformly to obtain the composite preparation of the liquid part. The preparation method of the solid part (composite preparation) comprises the steps of sequentially adding the tannin extract, the fulvic acid, the sodium hydroxide, the sodium carbonate and the trisodium phosphate into a container (a reaction kettle) according to the weight percentage, and uniformly mixing and stirring to obtain the solid part composite preparation.
In the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 150 g/ton make-up water, liquid fraction: 100 g/ton make-up water.
Application of example 1: the water quality of comprehensive make-up water is as follows: total hardness of 20mg-n/L and total alkalinity of 10mg-n/L, CL-500mg/L、PH7.8、Ca2+12mg-n/L, make-up water of circulating water, and the concentration multiple K =15 times after zero discharge operation concentration, at the moment, Cl in the circulating water-The content reaches 7500mg/L, and after the invention is used, the corrosion rate of the system metal material is as follows: carbon steel is 0.003-0.075 mm/year, and copper is 0.002-0.005 mm/year; stainless steel 0.0001-0.0003 mm/year, no pitting, calcium carbonate scale inhibiting rate higher than 85%, calcium phosphate scale inhibiting rate higher than 88%, and no bactericide.
Example 2: the corrosion and scale inhibitor for the circulating cooling water with high chloride ion content comprises a liquid part and a solid part, wherein: the weight percentages of the components of the liquid part are as follows based on the total weight of the liquid part being 100 percent: 20% of diethylenetriamine pentamethylene phosphonic acid (DTPMPA), 25% of N-containing polycarboxylic acid (NDA), 18% of phosphine sulfonic acid and the balance of water; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: tannin extract 15%, fulvic acid 26%, sodium hydroxide 1% and sodium salt in balance; the sodium salt is the combination of sodium tripolyphosphate and sodium nitrite, and the weight ratio of the sodium tripolyphosphate to the sodium nitrite is 1: 0.5.
the preparation method of the liquid part (composite preparation) comprises the steps of sequentially adding water, diethylenetriamine pentamethylenephosphonic acid, N-containing polycarboxylic acid (NDA) and phosphine sulfonic acid into a container (a reaction kettle) according to the weight percentage, and mixing and uniformly stirring to obtain the composite preparation of the liquid part. The preparation method of the solid part (composite preparation) comprises the steps of sequentially adding the tannin extract, the fulvic acid, the sodium hydroxide, the sodium tripolyphosphate and the sodium nitrite into a container (a reaction kettle) according to the weight percentage, and mixing and stirring uniformly to obtain the solid part composite preparation.
In the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 100 g/ton make-up water, liquid fraction: 200 g/ton make-up water.
Application of example 2: the water quality of comprehensive make-up water is as follows: total hardness of 18mg-n/L and total alkalinity of 12mg-n/L, CL-680mg/L、PH7.9、Ca2+15mg-n/L, make-up water of circulating water, and the concentration multiple K =15 times after zero discharge operation concentration, at the moment, Cl in the circulating water-The content reaches 10200mg/L, and after the invention is used, the corrosion rate of the system metal material is as follows: carbon steel is 0.035-0.075 mm/year, and copper is 0.0025-0.005 mm/year; stainless steel 0.0001-0.0003 mm/year, no pitting, calcium carbonate scale inhibiting rate of more than 87 percent, calcium phosphate scale inhibiting rate of more than 87 percent, and no bactericide is used.
Example 3: the corrosion and scale inhibitor for the circulating cooling water with high chloride ion content comprises a liquid part and a solid part, wherein: the weight percentages of the components of the liquid part are as follows based on the total weight of the liquid part being 100 percent: 10% of polyamine polyether methylene Phosphonic Acid (PAPEMP), 20% of organic carboxylic acid, 15% of polyepoxy sodium succinate (PESA) and the balance of water; the organic carboxylic acid is a combination of phosphine hydrolyzed polymaleic anhydride (PPMA) and N-element-containing polycarboxylic acid (NDA), and the weight ratio of the phosphine hydrolyzed polymaleic anhydride (PPMA) to the N-element-containing polycarboxylic acid (NDA) is 1: 0.5; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: tannin extract 15%, fulvic acid 25%, sodium hydroxide 0.5%, and sodium salt in balance; the sodium salt is a combination of sodium carbonate and trisodium phosphate, and the weight ratio of the sodium carbonate to the trisodium phosphate is 1: 0.8.
the preparation method of the liquid part (composite preparation) comprises the steps of sequentially adding water, polyamine polyether methylene Phosphonic Acid (PAPEMP), phosphine hydrolyzed polymaleic anhydride (PPMA), N-containing polycarboxylic acid (NDA) and sodium Polyepoxysuccinate (PESA) into a container (a reaction kettle) according to the weight percentage, and mixing and stirring uniformly to obtain the composite preparation of the liquid part. The preparation method of the solid part (composite preparation) comprises the steps of sequentially adding the tannin extract, the fulvic acid, the sodium hydroxide, the sodium carbonate and the trisodium phosphate into a container (a reaction kettle) according to the weight percentage, and uniformly mixing and stirring to obtain the solid part composite preparation.
In the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 150 g/ton make-up water, liquid fraction: 300 g/ton make-up water.
As shown in fig. 1, an administration device is provided in the replenishing water, through which the liquid part and the solid part prepared in the above embodiments are added to the replenishing water, the administration device comprises a first cavity body 2 in a spherical shape, a second cavity body 2 in a spherical shape, a first drug inlet tube 1, a second drug inlet tube 1 ', a plurality of first drug liquid tubes 3 fixed to the first cavity body and communicating the outside with the inside of the first cavity body, a plurality of second drug liquid tubes 3 fixed to the second cavity body and communicating the outside with the inside of the second cavity body, a first leg 4 supporting the first cavity body, a second leg 4 supporting the second cavity body, a lower end of the first drug inlet tube 1 communicating with the middle part of the first cavity body 2, a lower end of the second drug inlet tube 1 ' communicating with the middle part of the second cavity body 2 ', and the solid part being placed in the first cavity body 2, put into in the second cavity body 2 ', the liquid part, first medicine liquid pipe 3 is the same with the quantity of second medicine liquid pipe 3 ', every first medicine liquid pipe 3's round hole internal diameter is 1.5~2.0 times (select 1.8 times) of every second medicine liquid pipe 3 ''s round hole internal diameter, first medicine liquid pipe 3 is 8~15 centimetres (select 12 centimetres) with the nearest distance H of second medicine liquid pipe 3 ', the first medicine mouth that adds of advancing medicine pipe 1, the second medicine mouth that adds of advancing medicine pipe 1 ' all is located the higher authority of make-up water surface of water. The medicine feeder is adopted to feed medicine more uniformly and more quickly, the medicine feeding efficiency is improved by more than 30%, the production cost is reduced by more than 20%, and the requirements of various technical indexes such as scale inhibition rate, metal corrosion rate and bacterial and algae breeding rate required by GB50050-2007 design Specification for Industrial circulating Cooling Water are more easily met.
Compared with CN101125715A and CN105502704A in the background art, the components and contents of the above embodiments of the invention are obviously different, the invention can be used in circulating cooling water with high chloride ion content of 3000-100000 mg/L, and CN101125715A and CN105502704A in the background art obviously cannot meet the requirements.
According to GB50050-2007 design specification of industrial circulating cooling waterThe maximum water running pipe distance is 700mg/L, and Cl in the circulating water is required in practical application and experiments-Content (wt.)>When the corrosion and scale inhibitor is used in circulating cooling water at 3000mg/L, the corrosion and scale inhibitor can reach the metal corrosion rate specified in GB50050-2007 design Specification for industrial circulating cooling water: carbon steel less than 0.075 mm/year, copper<0.005 mm/year, stainless steel<0.005 mm/year, no metal pitting, calcium carbonate scale resistance rate of more than 90 percent and calcium phosphate scale resistance rate of more than 89 percent, and meets the national standard requirements. The invention has no pollution, no investment, no waste water and zero discharge operation when being used for treating circulating water, and can directly replace the original medicament with the medicament. The invention can treat Cl-Circulating cooling water with the content of 3000 mg/L-100000 mg/L.
In summary, for the above examples, the corrosion and scale inhibitor of the present invention is used to treat circulating cooling water with high chloride ion content, and the corrosion and scale inhibitor treats Cl in the circulating water-High tolerance of (chloride ion) content in Cl-When the content is 3000 mg/L-100000 mg/L, the scale inhibition rate, the metal corrosion rate and the bacterial and algae breeding rate required by GB50050-2007 design Specification for industrial circulating cooling water can be met, meanwhile, the concentration multiple is naturally balanced, the system runs in a zero-emission mode, no waste water is discharged, and the investment and the running cost of sewage treatment facilities are greatly reduced. Generally, no bactericidal algicide is used, no pre-film is used, the operation is stable, the economic and feasible effects are achieved, and the economic benefit and the social benefit are remarkable.
Claims (7)
1. A method for treating circulating cooling water with high chloride ion content of 3000-100000 mg/L is characterized in that a corrosion and scale inhibitor used comprises a liquid part and a solid part, wherein:
the liquid part is a composite preparation of organic phosphonic acid, organic carboxylic acid, substances with the functions of scale inhibition, corrosion inhibition and dispersion and water, and the liquid part comprises the following components in percentage by weight based on 100 percent of the total weight of the liquid part: 10-30% of organic phosphonic acid, 10-30% of organic carboxylic acid, 10-25% of substances with the functions of scale inhibition, corrosion inhibition and dispersion and the balance of water;
the solid part is a composite preparation of tannin extract, fulvic acid, sodium hydroxide and sodium salt, and the weight percentages of the components of the solid part are as follows based on 100 percent of the total weight of the solid part: 15-35% of tannin extract, 20-35% of fulvic acid, 0-5% of sodium hydroxide and the balance of sodium salt;
the organic phosphonic acid is selected from one or two of hydroxyethylidene diphosphonic acid, diethylenetriamine pentamethylene phosphonic acid (DTPMPA) and polyamine polyether methylene Phosphonic Acid (PAPEMP); the organic carboxylic acid is selected from one or two of 2-phosphonic acid butane-1, 2, 4-tricarboxylic acid (PBTCA), acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (AA/AMPS), N-containing polycarboxylic acid (NDA) and phosphine hydrolyzed polymaleic anhydride (PPMA); the substances with the functions of scale inhibition, corrosion inhibition and dispersion are selected from one or two of poly-epoxy sodium succinate (PESA) and phosphine sulfonic acid; the sodium salt is selected from one or two of sodium carbonate, trisodium phosphate, disodium hydrogen phosphate, sodium nitrite and sodium tripolyphosphate;
in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 100-300 g/ton make-up water, liquid part: 50-400 g/ton make-up water;
arranging a medicine feeder in the supplementing water, adding the prepared liquid part and solid part in the supplementing water through the medicine feeder, wherein the medicine feeder is provided with a spherical first cavity body (2), a spherical second cavity body (2 '), a first medicine inlet pipe (1), a second medicine inlet pipe (1 '), a plurality of first medicine liquid pipes (3) which are fixed on the first cavity body and communicate the outside with the inside of the first cavity body, a plurality of second medicine liquid pipes (3 ') which are fixed on the second cavity body and communicate the outside with the inside of the second cavity body, a first supporting leg (4) which supports the first cavity body, and a second supporting leg (4) which supports the second cavity body, the lower end of the first medicine inlet pipe (1) is communicated with the middle part of the first cavity body (2), and the lower end of the second medicine inlet pipe (1 ') is communicated with the middle part of the second cavity body (2 '), put into in the first cavity body (2) the solid part, put into in the second cavity body (2 ') the liquid part, first medicine liquid pipe (3) are the same with the quantity of second medicine liquid pipe (3 '), the round hole internal diameter of every first medicine liquid pipe (3) is 1.5~2.0 times of the round hole internal diameter of every second medicine liquid pipe (3 '), the nearest distance H of first medicine liquid pipe (3) and second medicine liquid pipe (3 ') is 8~15 centimetres, the medicine mouth that adds of first medicine liquid pipe (1), the medicine mouth that adds of second medicine liquid pipe (1 ') all are located the higher authority of make-up water surface of water.
2. The method according to claim 1, wherein the corrosion and scale inhibitor comprises a liquid part and a solid part, wherein: the weight percentages of the components of the liquid part are as follows based on the total weight of the liquid part being 100 percent: 15-20% of hydroxyethylidene diphosphonic acid, 10-15% of 2-phosphonic butane-1, 2, 4-tricarboxylic acid (PBTCA), 10-15% of N-element-containing polycarboxylic acid (NDA), 15-20% of polyepoxy sodium succinate (PESA) and the balance of water; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: 20-25% of tannin extract, 20-25% of fulvic acid, 2-5% of sodium hydroxide and the balance of sodium salt; the sodium salt is a combination of sodium carbonate and trisodium phosphate, and the weight ratio of the sodium carbonate to the trisodium phosphate is 1: 0.5;
in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 150 g/ton make-up water, liquid fraction: 100 g/ton make-up water.
3. The method according to claim 1, wherein the corrosion and scale inhibitor comprises a liquid part and a solid part, wherein: the weight percentages of the components of the liquid part are as follows based on the total weight of the liquid part being 100 percent: 15-25% of diethylenetriamine pentamethylene phosphonic acid (DTPMPA), 20-30% of N-containing polycarboxylic acid (NDA), 10-25% of phosphine sulfonic acid and the balance of water; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: 15-20% of tannin extract, 25-30% of fulvic acid, 1-5% of sodium hydroxide and the balance of sodium salt; the sodium salt is the combination of sodium tripolyphosphate and sodium nitrite, and the weight ratio of the sodium tripolyphosphate to the sodium nitrite is 1: 0.5;
in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 100 g/ton make-up water, liquid fraction: 200 g/ton make-up water.
4. The method according to claim 1, wherein the corrosion and scale inhibitor comprises a liquid part and a solid part, wherein: the weight percentages of the components of the liquid part are as follows based on the total weight of the liquid part being 100 percent: 10-15% of polyamine polyether methylene Phosphonic Acid (PAPEMP), 20-30% of organic carboxylic acid, 10-20% of polyepoxy sodium succinate (PESA) and the balance of water; the organic carboxylic acid is a combination of phosphine hydrolyzed polymaleic anhydride (PPMA) and N-element-containing polycarboxylic acid (NDA), and the weight ratio of the phosphine hydrolyzed polymaleic anhydride (PPMA) to the N-element-containing polycarboxylic acid (NDA) is 1: 0.5; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: 15-20% of tannin extract, 25-30% of fulvic acid, 0.5% of sodium hydroxide and the balance of sodium salt; the sodium salt is a combination of sodium carbonate and trisodium phosphate, and the weight ratio of the sodium carbonate to the trisodium phosphate is 1: 0.8;
in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 150 g/ton make-up water, liquid fraction: 300 g/ton make-up water.
5. The method according to claim 1, wherein the corrosion and scale inhibitor comprises a liquid part and a solid part, wherein: the weight percentages of the components of the liquid part are as follows based on the total weight of the liquid part being 100 percent: 18% of hydroxyethylidene diphosphonic acid, 12% of 2-phosphonic butane-1, 2, 4-tricarboxylic acid (PBTCA), 10% of N-containing polycarboxylic acid (NDA), 16% of sodium Polyepoxysuccinate (PESA) and the balance of water; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: tannin extract 22%, fulvic acid 21%, sodium hydroxide 2% and sodium salt in balance; the sodium salt is a combination of sodium carbonate and trisodium phosphate, and the weight ratio of the sodium carbonate to the trisodium phosphate is 1: 0.5;
in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 150 g/ton make-up water, liquid fraction: 100 g/ton make-up water.
6. The method according to claim 1, wherein the corrosion and scale inhibitor comprises a liquid part and a solid part, wherein: the weight percentages of the components of the liquid part are as follows based on the total weight of the liquid part being 100 percent: 20% of diethylenetriamine pentamethylene phosphonic acid (DTPMPA), 25% of N-containing polycarboxylic acid (NDA), 18% of phosphine sulfonic acid and the balance of water; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: tannin extract 15%, fulvic acid 26%, sodium hydroxide 1% and sodium salt in balance; the sodium salt is the combination of sodium tripolyphosphate and sodium nitrite, and the weight ratio of the sodium tripolyphosphate to the sodium nitrite is 1: 0.5;
in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 100 g/ton make-up water, liquid fraction: 200 g/ton make-up water.
7. The method according to claim 1, wherein the corrosion and scale inhibitor comprises a liquid part and a solid part, wherein: the weight percentages of the components of the liquid part are as follows based on the total weight of the liquid part being 100 percent: 10% of polyamine polyether methylene Phosphonic Acid (PAPEMP), 20% of organic carboxylic acid, 15% of polyepoxy sodium succinate (PESA) and the balance of water; the organic carboxylic acid is a combination of phosphine hydrolyzed polymaleic anhydride (PPMA) and N-element-containing polycarboxylic acid (NDA), and the weight ratio of the phosphine hydrolyzed polymaleic anhydride (PPMA) to the N-element-containing polycarboxylic acid (NDA) is 1: 0.5; the weight percentages of the components of the solid part are as follows based on the total weight of the solid part of 100 percent: tannin extract 15%, fulvic acid 25%, sodium hydroxide 0.5%, and sodium salt in balance; the sodium salt is a combination of sodium carbonate and trisodium phosphate, and the weight ratio of the sodium carbonate to the trisodium phosphate is 1: 0.8;
in the circulating cooling water, the addition amount of a liquid part and a solid part in each ton of makeup water is as follows: 150 g/ton make-up water, liquid fraction: 300 g/ton make-up water.
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| CN101125715A (en) * | 2007-08-16 | 2008-02-20 | 樊桂修 | Composite corrosion-retarding antisludging agent for treating high-concentration multiple circulating water |
| CN101759301A (en) * | 2008-12-26 | 2010-06-30 | 上海淼清水处理有限公司 | Anti-incrustation corrosion inhibitor for circulating water system with high concentration time and high chloride ion content |
| CN202356013U (en) * | 2011-10-31 | 2012-08-01 | 河北聚良环保设备有限公司 | Spinning-water-bath-type flue gas desulfurization device |
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| JP2008006369A (en) * | 2006-06-29 | 2008-01-17 | Kurita Water Ind Ltd | Scale prevention method |
| CN101607766B (en) * | 2009-05-25 | 2011-01-26 | 新疆德蓝股份有限公司 | Preparation of corrosion and scale inhibitor used for high alkaline high chlorine circulating cooling water |
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| CN101125715A (en) * | 2007-08-16 | 2008-02-20 | 樊桂修 | Composite corrosion-retarding antisludging agent for treating high-concentration multiple circulating water |
| CN101759301A (en) * | 2008-12-26 | 2010-06-30 | 上海淼清水处理有限公司 | Anti-incrustation corrosion inhibitor for circulating water system with high concentration time and high chloride ion content |
| CN202356013U (en) * | 2011-10-31 | 2012-08-01 | 河北聚良环保设备有限公司 | Spinning-water-bath-type flue gas desulfurization device |
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Inventor after: Fan Guixiu Inventor after: Fan Ting Inventor before: Fan Ting Inventor before: Fan Guixiu |