CN102992509B - Method for controlling pH of industrial cooling water circulation system - Google Patents
Method for controlling pH of industrial cooling water circulation system Download PDFInfo
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- CN102992509B CN102992509B CN201110277451.6A CN201110277451A CN102992509B CN 102992509 B CN102992509 B CN 102992509B CN 201110277451 A CN201110277451 A CN 201110277451A CN 102992509 B CN102992509 B CN 102992509B
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Abstract
The invention discloses a method for controlling pH of an industrial cooling water circulation system. The method comprises a step of removing rust and scales chemically and a step of filming. The method for controlling pH of the industrial cooling water circulation system is characterized by firstly adding a penetration activator in a circulating water collecting tank and adjusting the pH value to 5.5-6.5 by using sulfuric acid for 4-8 hours; then adding a chemical rust and scale removal agent in the circulating water collecting tank for once and adjusting the pH value to 3.5-5.5 by using sulphamic acid during the chemical rust and scale removal process; and adjusting the pH value of the covered film to 6.0-7.0 by using sulfuric acid. According to the method, the pH value is controlled by adding faintly acidic organic sulfamic acid and highly acidic inorganic sulfuric acid during different running periods of a circulating water system, so that the pH value for chemical cleaning and filming can be controlled better, the control requirements on the pH value during the chemical cleaning and filming can be satisfied, and the chemical cleaning and filming can achieve the ideal effects.
Description
Technical field
The present invention relates to the industrial colling recycle system, particularly relate to a kind of method of controlling industrial colling recycle system pH.
Background technology
In existing technique, the industrial colling recycle system is processed and is mainly divided into physical treatment and chemical treatment.Physical treatment technology mainly contains: magnetic treatment, Electrostatic Treatment, photochemical treatment, ultrasonication etc., simple to operate, the advantage such as working cost is low, nontoxic pollution-free that physical treatment technology has.This method is applicable to the water quality that hardness is less, and to the water treatment effect of the higher complicated water quality of current China hardness unsatisfactory.Chemical treatment method normally adds a certain amount of water quality stabilizer to carry out the fouling and corrosion of anti-water-stopping system in make up water.Utilize the sequestering action of dirt dispersion agent and scale-forming ion or the lattice distortion effect of fouling crystal is reached to the object of antiscale; utilize inhibiter to suppress the anodic process of corrosion reaction, in metallic surface, form precipitation membrane covered cathode surface, at metallic surface oriented adsorption the adsorption film that forms protectiveness, stop the anode and cathode process of corrosion, thereby play corrosion inhibition.
But in chemical treatment method, the industrial colling recycle system is the effect that guarantees matting and pre-film in matting and pre-membrane process, must meet the working conditions requirement of matting and pre-film medicament, meet matting and the requirement of pre-film medicament to pH value span of control, to control the pH of recirculated cooling water, mainly with strongly-acid mineral acid, to regulate pH in matting and pre-membrane process in the past, the difficulty of controlling like this pH in matting actually operating is larger, the consumption of strongly-acid mineral acid is difficult to get hold of, often occur that pH value is lower than the accident of span of control, often by adding alkali, PH is heightened again, if pH value is adjusted too highly to add again strongly-acid mineral acid and is reduced PH, control requirement to pH value while being therefore difficult to meet matting, effect to matting and pre-film affects.
Summary of the invention
The object of the present invention is to provide a kind of pH value that can control well recirculated water well, thus the control requirement of pH value while meeting matting and pre-film, make matting and in advance film reach the method for the control industrial colling recycle system pH of desirable effect.
The technical solution used in the present invention is: a kind of method of controlling industrial colling recycle system pH, and include chemical rust removing scale removal, give film step, it is characterized in that:
The main process of described chemical rust removing scale removal is as follows:
(1) through sterilization, peel off, replace after the turbidity < 10PPm of recirculated water, form water through water cooler the circulation loop through cooling tower;
(2) in the water collecting basin of recirculated water, add penetration activator, with sulfuric acid adjust pH 5.5～6.5, move 4～8 hours;
(3) to the ingress of the recycle pump of system, the disposable chemical rust removing scale removal medicament that adds, with thionamic acid adjust pH to 3.5～5.5, and keep the operation of pH value 48 hours or according to control analysis data judging degreasing rust cleaning terminal, in cleaning process, according to on-site actual situations, add again dispersing scale inhibitor;
(4) after cleaning finishes, large excretion and large complement are replaced, and in displacement process, maintain pH value and are less than 7, add dirt dispersion agent;
The described main process that gives film is as follows:
(1) the turbidity < 10PPm of recirculated water after displacement, formation water is the circulation loop through cooling tower through water cooler;
(2) measure pH value, with sulfuric acid adjust pH to 6.0～7.0, and in giving film whole process, keep stable;
(3) to system, add and give film, Zinc Sulphate Heptahydrate, guarantee that the content of organophosphorus after dispensing half an hour is more than 13mg/l;
(4) give film and reach after terminal, should open blowdown and moisturizing, with fast as far as possible speed displacement.
Described while giving in film (4) displacement, should notice that pH rises can not be too fast, and first several hours pH after discharge starts keep can not > 7.5.
Described while giving in film (4) displacement, regularly measure the content of organic phosphine, when dropping to 6.0mg/l, organophosphorus stops discharge, proceed to normal operation, add corrosion inhibiting and descaling agent, maintain organic concentration 6-8mg/L operation of seeing.
The present invention in industrial colling recycle system chemical rust removing scale removal process by adding slightly acidic organic acid after first throwing strongly-acid mineral acid sulfuric acid, control pH value by adding strongly-acid mineral acid sulfuric acid in the pre-membrane process of the industrial colling recycle system, can control preferably the pH value of matting, pre-film well, thereby the control requirement to pH value while meeting matting and pre-film, makes matting and pre-film reach desirable effect.
Embodiment
The invention will be further described for specific examples below:
The industrial colling recycle system by method Dui Mou chemical fertilizer division department's steam workshop of above-mentioned disclosed control industrial colling recycle system pH is carried out circular treatment, and particular case is shown in following embodiment.
Embodiment 1
The present invention controls the method for industrial colling recycle system pH, be included in chemical rust removing scale removal, give in film step and control pH, wherein the main process of chemical rust removing scale removal is as follows: (1) through sterilization, peel off, replace after the turbidity < 10PPm of recirculated water, form water through water cooler the circulation loop through cooling tower; (2) in the water collecting basin of recirculated water, add penetration activator, with sulfuric acid adjust pH to 5.5, move 4 hours; (3) to the ingress of the recycle pump of system, the disposable chemical rust removing scale removal medicament that adds, with thionamic acid adjust pH to 3.5, and keep the operation of pH value 48 hours or according to control analysis data judging degreasing rust cleaning terminal, in cleaning process, according to on-site actual situations, add again dispersing scale inhibitor; (4) after cleaning finishes, large excretion and large complement are replaced, and in displacement process, maintain pH value and are less than 7, add dirt dispersion agent;
The main process that wherein gives film is as follows: (1) is the turbidity < 10PPm of recirculated water after displacement, form water through water cooler the circulation loop through cooling tower; (2) measure pH value, with sulfuric acid adjust pH to 6.0, and in giving film whole process, keep stable; (3) to system, add and give film, Zinc Sulphate Heptahydrate, guarantee that the content of organophosphorus after dispensing half an hour is more than 13mg/l; (4) give film and reach after terminal, should open blowdown and moisturizing, with fast as far as possible speed displacement, the first several hour pHs of discharge after starting rise can not be too fast, and maintenance can not > 7.5; Regularly measure the content of organic phosphine simultaneously, when organophosphorus drops to 6.0mg/l, stop discharge, proceed to normal operation, add corrosion inhibiting and descaling agent, maintain organic concentration 6-8mg/L operation of seeing.
Embodiment 2
The present invention controls the method for industrial colling recycle system pH, be included in chemical rust removing scale removal, give in film step and control pH, wherein the main process of chemical rust removing scale removal is as follows: (1) through sterilization, peel off, replace after the turbidity < 10PPm of recirculated water, form water through water cooler the circulation loop through cooling tower; (2) in the water collecting basin of recirculated water, add penetration activator, with sulfuric acid adjust pH 6, move 6 hours; (3) to the ingress of the recycle pump of system, the disposable chemical rust removing scale removal medicament that adds, with thionamic acid adjust pH to 4.5, and keep the operation of pH value 48 hours or according to control analysis data judging degreasing rust cleaning terminal, in cleaning process, according to on-site actual situations, add again dispersing scale inhibitor; (4) after cleaning finishes, large excretion and large complement are replaced, and in displacement process, maintain pH value and are less than 7, add dirt dispersion agent;
The main process that wherein gives film is as follows: (1) is the turbidity < 10PPm of recirculated water after displacement, form water through water cooler the circulation loop through cooling tower; (2) measure pH value, with sulfuric acid adjust pH to 6.5, and in giving film whole process, keep stable; (3) to system, add and give film, Zinc Sulphate Heptahydrate, guarantee that the content of organophosphorus after dispensing half an hour is more than 13mg/l; (4) give film and reach after terminal, should open blowdown and moisturizing, with fast as far as possible speed displacement, the first several hour pHs of discharge after starting rise can not be too fast, and maintenance can not > 7.5; Regularly measure the content of organic phosphine simultaneously, when organophosphorus drops to 6.0mg/l, stop discharge, proceed to normal operation, add corrosion inhibiting and descaling agent, maintain organic concentration 6-8mg/L operation of seeing.
Embodiment 3
The present invention controls the method for industrial colling recycle system pH, be included in chemical rust removing scale removal, give in film step and control pH, wherein the main process of chemical rust removing scale removal is as follows: (1) through sterilization, peel off, replace after the turbidity < 10PPm of recirculated water, form water through water cooler the circulation loop through cooling tower; (2) in the water collecting basin of recirculated water, add penetration activator, with sulfuric acid adjust pH 6.5, move 8 hours; (3) to the ingress of the recycle pump of system, the disposable chemical rust removing scale removal medicament that adds, with thionamic acid adjust pH to 5.5, and keep the operation of pH value 48 hours or according to control analysis data judging degreasing rust cleaning terminal, in cleaning process, according to on-site actual situations, add again dispersing scale inhibitor; (4) after cleaning finishes, large excretion and large complement are replaced, and in displacement process, maintain pH value and are less than 7, add dirt dispersion agent;
The main process that wherein gives film is as follows: (1) is the turbidity < 10PPm of recirculated water after displacement, form water through water cooler the circulation loop through cooling tower; (2) measure pH value, with sulfuric acid adjust pH to 7.0, and in giving film whole process, keep stable; (3) to system, add and give film, Zinc Sulphate Heptahydrate, guarantee that the content of organophosphorus after dispensing half an hour is more than 13mg/l; (4) give film and reach after terminal, should open blowdown and moisturizing, with fast as far as possible speed displacement, the first several hour pHs of discharge after starting rise can not be too fast, and maintenance can not > 7.5; Regularly measure the content of organic phosphine simultaneously, when organophosphorus drops to 6.0mg/l, stop discharge, proceed to normal operation, add corrosion inhibiting and descaling agent, maintain organic concentration 6-8mg/L operation of seeing.
Embodiment of the present invention is only the description that the preferred embodiment of the present invention is carried out; not design of the present invention and scope are limited; do not departing under the prerequisite of design philosophy of the present invention; various modification and improvement that in this area, engineering technical personnel make technical scheme of the present invention; all should fall into protection scope of the present invention; the technology contents that the present invention asks for protection, is all documented in claims.
Claims (3)
1. control a method of industrial colling recycle system pH, include chemical rust removing scale removal, pre-film step, it is characterized in that:
The main process of described chemical rust removing scale removal is as follows:
(1) through sterilization, peel off, replace after turbidity < 10 PPm of recirculated water, form water through water cooler the circulation loop through cooling tower;
(2) in the water collecting basin of recirculated water, add penetration activator, with sulfuric acid adjust pH 5.5～6.5, move 4～8 hours;
(3) to the ingress of the recycle pump of system, the disposable chemical rust removing scale removal medicament that adds, with thionamic acid adjust pH to 3.5～5.5, and keep the operation of pH value 48 hours or according to control analysis data judging degreasing rust cleaning terminal, in cleaning process, according to on-site actual situations, add again dispersing scale inhibitor;
(4) after cleaning finishes, large excretion and large complement are replaced, and in displacement process, maintain pH value and are less than 7, add dispersing scale inhibitor;
The main process of described pre-film is as follows:
(1) turbidity < 10 PPm of recirculated water after displacement, formation water is the circulation loop through cooling tower through water cooler;
(2) measure pH value, with sulfuric acid adjust pH to 6.0～7.0, and keep stable in pre-film whole process;
(3) to system, add prefilming agent, Zinc Sulphate Heptahydrate, guarantee that the content of organic phosphine after dispensing half an hour is more than 13mg/l;
(4) pre-film reaches after terminal, should open blowdown and moisturizing, with fast as far as possible speed displacement.
2. circulating water system according to claim 1 is controlled the method for pH, it is characterized in that: in the main process step (4) of described pre-film during displacement, should notice that pH rising can not be too fast, first several hours pH after discharge starts keep can not > 7.5.
3. circulating water system according to claim 1 is controlled the method for pH, it is characterized in that: in the main process step (4) of described pre-film during displacement, regularly measure the content of organic phosphine, when dropping to 6.0mg/l, organic phosphine stops discharge, proceed to normal operation, add corrosion inhibiting and descaling agent, maintain organic phosphine concentration 6-8mg/L operation.
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| CN201110277451.6A CN102992509B (en) | 2011-09-19 | 2011-09-19 | Method for controlling pH of industrial cooling water circulation system |
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| CN201110277451.6A CN102992509B (en) | 2011-09-19 | 2011-09-19 | Method for controlling pH of industrial cooling water circulation system |
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| CN102992509A CN102992509A (en) | 2013-03-27 |
| CN102992509B true CN102992509B (en) | 2014-05-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103613226B (en) * | 2013-12-13 | 2016-04-13 | 海南汉地阳光石油化工有限公司 | A kind of industrial circulation water treatment method |
| CN104451026B (en) * | 2014-11-17 | 2016-01-27 | 武钢集团昆明钢铁股份有限公司 | A kind of converter clean circulating water system on-line cleaning prefilming method |
| CN107675150B (en) * | 2017-09-22 | 2019-04-26 | 山东天庆科技发展有限公司 | A kind of chemical cleaning prefilming method of circulation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067230A (en) * | 1991-05-25 | 1992-12-23 | 益阳地区氮肥厂 | Nitrogen fertilizer plant's ammonia-containing water and contain ammonia circulating water treatment technology |
| CN1436740A (en) * | 2002-02-07 | 2003-08-20 | 中国石油化工股份有限公司 | Corrosion inhibiting method for cooling water system of production equipment in shutdown period |
| CN101182643A (en) * | 2007-11-22 | 2008-05-21 | 同济大学 | Environment-friendly type composite pre-film reagent used for recirculated cooling water system pre-film processing and method of use thereof |
| CN101817601A (en) * | 2010-04-27 | 2010-09-01 | 上海通禹图治环保科技有限公司 | Water quality stabilizer without acid for adjusting pH value |
-
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- 2011-09-19 CN CN201110277451.6A patent/CN102992509B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067230A (en) * | 1991-05-25 | 1992-12-23 | 益阳地区氮肥厂 | Nitrogen fertilizer plant's ammonia-containing water and contain ammonia circulating water treatment technology |
| CN1436740A (en) * | 2002-02-07 | 2003-08-20 | 中国石油化工股份有限公司 | Corrosion inhibiting method for cooling water system of production equipment in shutdown period |
| CN101182643A (en) * | 2007-11-22 | 2008-05-21 | 同济大学 | Environment-friendly type composite pre-film reagent used for recirculated cooling water system pre-film processing and method of use thereof |
| CN101817601A (en) * | 2010-04-27 | 2010-09-01 | 上海通禹图治环保科技有限公司 | Water quality stabilizer without acid for adjusting pH value |
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