CN1023207C - Deoxidizer for boiler water and producting thereof - Google Patents
Deoxidizer for boiler water and producting thereof Download PDFInfo
- Publication number
- CN1023207C CN1023207C CN 90105183 CN90105183A CN1023207C CN 1023207 C CN1023207 C CN 1023207C CN 90105183 CN90105183 CN 90105183 CN 90105183 A CN90105183 A CN 90105183A CN 1023207 C CN1023207 C CN 1023207C
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- Prior art keywords
- boiler
- wat
- copper sulfate
- water
- polymaleic anhydride
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention relates to a deoxidizer for boiler water, which is suitable for water deoxidization and scaling prevention, and a producing method thereof. The present invention is characterized in that a certain amount of sodium sulfite, sodium metabisulfite and potassium nitrate are mixed, and a right amount of zinc chloride is added in the mixing process; next, the mixed liquid of the prepared hydrolyzed polymaleic anhydride or (and) amino trimethylene-phosphoric acid, and copper sulfate (pH value is 6.0 to 8.0) is added, and then an obtained mixture is stirred for one to two hours to be ground into a green powdery finished product. The deoxidizer can be used for quick deoxidization at normal temperature, and has the functions of scaling prevention, corrosion prevention, algae prevention, etc.
Description
The invention belongs to antiscale, corrosion protection, the anti-algae technical field of boiler feed water.
Dissolved oxygen in the boiler feed water also is very surprising very seriously to corrosion of metal, because the pipe network of most of operation adopts closed cycle, the water through deoxygenation does not enter boiler and pipe network, and these dissolved oxygens all consume metallic corrosion on metal.For example: one 6.5 tons/time boiler about 100 square metres of heating surface area, the metallic surface is 200 square metres, as with the not direct moisturizing of water of deoxygenation, can bring dissolved oxygen every year into and can reach 640 kilograms, these dissolved oxygens have corrodible about 1676 kilograms an of iron and steel that falls.The about 20-25 ton of such boiler, the weight of heating surface area is about half of total amount, is not considering outer wall corrosion and wearing and tearing, and single inner wall corrosion only needed for six or seven years with furnace tube corrosion light.But general oxygen in water is uneven to corrosion of metal, furnace tube corrosion can be penetrated with time more than a year if corrosion concentrates on 20% metallic surface, and the area that has is owing to this only more than a year time boiler must be scrapped.Therefore the dissolved oxygen of removing in the water is important measures that prevent boiler corrosion in the water treatment.The boiler deoxidizing method of present stage is except that with the employing mostly of the boiling deoxidizing of main equipment medication: i.e. S-WAT, hydrazine, sodium bisulfite, sulfurous gas body, ferrous hydroxide etc.Above-mentioned S-WAT generates sodium sulfate after reacting with oxygen in water in use, although removed dissolved oxygen, has generated new salt, finishes the possibility that scales thereby increase.S-WAT can not generate complex compound with calcium in the water, magnesium ion in addition, and requires when deoxygenation water temperature at 60-80 ℃ and excessive; With above-mentioned hydrazine deoxygenation, also can reach the purpose of deoxygenation, but hydrazine is a kind of inflammable substance, and is toxic substance, so people seldom use.All not ideal from the deoxygenation way of above-mentioned present stage as can be seen.
The objective of the invention is to problem at above-mentioned existence, but and a kind of both deoxygenations are provided, but boiler water quality deoxidization agent and the production method thereof of antiscale again, corrosion protection, anti-algae.
The object of the present invention is achieved like this: 60-80%(is heavy) S-WAT, 3-20%(heavy) Sodium Pyrosulfite and 0-15%(heavy) the saltpetre thorough mixing, adding 1-10%(weight in mixing process) zinc chloride, again that the 2-8%(for preparing is heavy) hydrolytic polymaleic anhydride or and Amino Trimethylene Phosphonic Acid, 0.5-1.5%(heavy) the mixing liquid of copper sulfate (pH value is 6.0-8.0) add and get final product, after 1-2 hour stirring, grinding, be finished product.It is 6.0-8.0 that above-mentioned mixing liquid is regulated the pH value by sodium hydroxide or tertiary sodium phosphate.
Reaction mechanism:
The reaction that drops into S-WAT and Sodium Pyrosulfite is:
The following reaction of corrosive gases that after the high-temperature zone is owing to the adding oxygen scavenger, produces:
For preventing metal hydrogen, the sulfur dichloride corrosion that cures, zinc chloride has played the cathode filming protection in water, react as follows:
Because Zn
2+To negative electrode and OH
-Give synthetic Zn(OH)
2Cover cathode surface, suppressed " battery " effect of pipeline and feedwater, corrosion is stopped, its effect is to have changed electropotential or polarization curve.
S-WAT among the present invention and the reaction of the dissolved oxygen in the water generate sodium sulfate disappears the oxygen in the water.In order to give full play to the deaerating effect of S-WAT, accelerate the disappearance of dissolved oxygen, then be catalyzer with copper sulfate, copper sulfate has played instrumentality and deoxygenation is carried out fast and has not been subjected to the influence of external conditions in deoxygenation, improve tens times than the simple S-WAT that uses on the deoxygenation time.Filming medium zinc chloride in the prescription prevents tube inner corrosion in the protection of the cathodic area of metallic surface film forming in addition.Hydrolytic polymaleic anhydride (HPMA) or (with) Amino Trimethylene Phosphonic Acid (ATMP) produces sequestering action to the calcium in the water, magnesium ion and the salt that increased in oxygen removal process, the metal ion of this Scale inhibitors and scale forming matter generates the bigger inner complex of solubleness, metal ion behind the chelating can not contact with the negatively charged ion of scale forming matter and generate precipitation, thereby has played scale effect.
The present invention is not subjected to the influence of water temperature in deoxygenation, antiscale process, get final product at normal temperatures.In addition this product nonflammable, human body is not had any harm, environmentally safe, and improved the operation life of boiler and heating pipe network has widely been saved a large amount of energy.Therefore the present invention has functions such as deoxygenation, antiscale, corrosion protection, anti-algae simultaneously in the oxygen removal process of boiler water quality and cooling circulating water.
Below will the invention will be further described by embodiment:
Embodiment:
At normal temperatures S-WAT, Sodium Pyrosulfite, nitric acid are mixed in the ratio of following prescription, put into then in the agitator, add zinc chloride while stirring; Again with the hydrolytic polymaleic anhydride for preparing or (with) mixing liquid (the pH value of mixing liquid reconciles into 6.0-8.0 by sodium hydroxide or trisodium phosphate solution) of Amino Trimethylene Phosphonic Acid, copper sulfate adopts spraying process to add equably in the above-mentioned agitator.Grind through after 1-2 hour the stirring, become light green solid powdery finished product at last.
Physical properties: shallow green powder, almond flavor is arranged, soluble in water, nontoxic.
Product quality index: content 〉=90%
Water-insoluble≤0.05%
Synthetic 100Kg oxygen scavenger prescription
Title purity (%) prescription 1 prescription 2 prescriptions 3
（Kg）????（Kg）????（Kg）
S-WAT 98 65 75 79
Sodium Pyrosulfite 64 15 66
Zinc chloride 94 746
Copper sulfate 0.5 0.8 0.6
Hydrolytic polymaleic anhydride 50 53
Amino Trimethylene Phosphonic Acid 50 73
Saltpetre 99 364
Distilled water 2.5 3.2 2.4
Claims (3)
1, a kind ofly be applicable to the boiler feed water deoxygenation, the production method of the boiler water quality deoxidization agent of antiscale, it is characterized in that by following ratio range S-WAT, Sodium Pyrosulfite and saltpetre thorough mixing, in mixing process, add zinc oxide, again with the hydrolytic polymaleic anhydride for preparing or, and Amino Trimethylene Phosphonic Acid, the pH value of copper sulfate is that the mixing liquid adding of 6.0-8.0 gets final product, stirring through 1-2 hour, be finished product after the grinding, its weight percent is: S-WAT 60-80%, Sodium Pyrosulfite 3-20%, saltpetre 0-15%, zinc chloride 1-10%, hydrolytic polymaleic anhydride or, with Amino Trimethylene Phosphonic Acid 2-8%, copper sulfate 0.5-1.5%.
2, the production method of boiler feed water matter oxygen scavenger according to claim 1 is characterized in that it is 6.0-8.0 that mixing liquid is regulated the pH value by sodium hydroxide or tertiary sodium phosphate.
3, a kind of boiler water quality deoxidization agent that is applicable to boiler feed water deoxygenation, antiscale, it is characterized in that S-WAT, Sodium Pyrosulfite, saltpetre, zinc oxide, hydrolytic polymaleic anhydride or and the weight percent of Amino Trimethylene Phosphonic Acid, copper sulfate be: 60-80%, 3-20%, 0-15%, 1-10%, 2-8%, 0.5-1.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105183 CN1023207C (en) | 1990-07-27 | 1990-07-27 | Deoxidizer for boiler water and producting thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105183 CN1023207C (en) | 1990-07-27 | 1990-07-27 | Deoxidizer for boiler water and producting thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1058384A CN1058384A (en) | 1992-02-05 |
| CN1023207C true CN1023207C (en) | 1993-12-22 |
Family
ID=4879015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90105183 Expired - Fee Related CN1023207C (en) | 1990-07-27 | 1990-07-27 | Deoxidizer for boiler water and producting thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023207C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2762595C1 (en) * | 2021-02-12 | 2021-12-21 | Александр Владимирович Липовка | Method for non-thermal deaeration of water |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523843B (en) * | 2013-10-29 | 2016-03-02 | 天津科维津宏环保科技有限公司 | A kind of Low-temperature boiler deoxidant and preparation method thereof |
| CN104402080A (en) * | 2014-06-17 | 2015-03-11 | 上海南阳精细化工有限公司 | Boiler feedwater deoxidant for replacing thermal deaerator and preparation and application methods thereof |
| CN104276678B (en) * | 2014-10-20 | 2016-08-24 | 佛山市南海区巨人化学品制造有限公司 | A kind of corrosion inhibiting and descaling agent for recirculated cooling water |
| CN104310599A (en) * | 2014-10-22 | 2015-01-28 | 山东华亚环保科技有限公司 | Corrosion and scale inhibitor used for circulating cooling water |
| CN109292876A (en) * | 2018-11-13 | 2019-02-01 | 中盐安徽红四方股份有限公司 | Boiler water oxygen regulator |
| CN113044998B (en) * | 2021-03-26 | 2022-08-26 | 四川鸿康科技股份有限公司 | Boiler water supply agent and preparation method and application thereof |
-
1990
- 1990-07-27 CN CN 90105183 patent/CN1023207C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2762595C1 (en) * | 2021-02-12 | 2021-12-21 | Александр Владимирович Липовка | Method for non-thermal deaeration of water |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1058384A (en) | 1992-02-05 |
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