CN1459424A - Special corrosion and scale inhibitor for surface evaporation air cooling - Google Patents
Special corrosion and scale inhibitor for surface evaporation air cooling Download PDFInfo
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- CN1459424A CN1459424A CN 02117840 CN02117840A CN1459424A CN 1459424 A CN1459424 A CN 1459424A CN 02117840 CN02117840 CN 02117840 CN 02117840 A CN02117840 A CN 02117840A CN 1459424 A CN1459424 A CN 1459424A
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- corrosion
- air cooling
- surface evaporation
- evaporation air
- scale inhibitor
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Abstract
A retarding-corrosion antiscaling compound for the surface-evaporating air cooler used in high-hardness and high-basicity circulating water system is prepared from zinc sulfate 15-25 wt. portions, acrylic acid-acrylate copolymer 30-36 portions, hydroxy-1-1-ethylene diphosphonic acid 34-46 portions, and benzotriazole 4-6 portions. It still exhibits good performance under the condition of relatively bad quality of circulating water. Its advantages are its effect little affected by turbidity, adapting to wide pH range, high effect, and low dosage.
Description
Affiliated technical field
The present invention relates to a kind of high-efficiency corrosion-mitigation scale-inhibition agent prescription, this agent is mainly used in the corrosion-mitigation scale-inhibition of the circulating water system of high rigidity, high basicity, specifically, be the special corrosion and scale inhibitor for surface evaporation air cooling that in refinery surface evaporation air cooling cooling water system, uses.
Background technology
At present, domesticly exist serious corrosion and scaling problem for domestic petroleum chemical plant surface evaporation air cooling water system.Because the used water coolant of most of surface evaporation air cooling equipment is a high rigidity, high basicity water quality, the water treatment agent of this circulating water system is still adopted the treatment process of inorganic poly-phosphorus zincification, but treatment effect is unsatisfactory, mainly show as: 1) because inorganic poly-phosphorus originally very easily is decomposed into phosphoric acid salt under comparatively high temps (50 ℃), the corrosion inhibition of phosphoric acid salt itself is limited and easily form phosphatic dirt deposition and form new corrosion and scaling problem on cooling apparatus surface, so the current water treatment prescription that generally adopts is in high rigidity, corrosion inhibition under the high basicity condition of water quality, scale-inhibiting properties can not satisfy the production needs; 2) very easily decompose owing to inorganic poly-phosphorus, thereby the medicament amount of consumption of drugs greatly causes cost to rise.
The anti-corrosion, scale-inhibiting medicament that does not also have at present head it off in actual applications, does not also have a kind of special corrosion and scale inhibitor that can suppress surface evaporation air cooling corrosion and fouling.
Summary of the invention
The objective of the invention is to develop a kind of special corrosion and scale inhibitor that can suppress surface evaporation air cooling corrosion and fouling, thereby effectively solve the corrosion and the scale problems of domestic petroleum chemical plant surface evaporation air cooling.
The present invention is achieved in that
The prescription of corrosion inhibiting and descaling agent is as follows: include zinc sulfate, vinylformic acid-acrylic acid esters co-polymer: hydroxyl 1-1-ethylidene diphosphonic acid, benzotriazole, and (%) is as follows for its weight proportion:
Zinc sulfate: 15～25
Vinylformic acid-acrylic acid esters co-polymer: 30～36
Hydroxyl 1-1-ethylidene diphosphonic acid: 34～46
Benzotriazole: 4～6
The present invention also adopts following technical scheme:
Corrosion inhibiting and descaling agent pH value (1% aqueous solution) is 0.98～1.23; Density (g/cm
3) be 1.30 ± 0.10.
The invention has the advantages that: corrosion inhibiting and descaling agent has excellent corrosion and scale inhibition performance, it is little influenced by turbidity, pH value subject range is wide, test in place shows, under circulating water quality comparison condition of severe, still show good corrosion and scale inhibition performance (corrosion speed of restraining according to the scene of GB GB50050-95 regulation must be lower than 0.125mm/a, and RH-2 corrosion inhibiting and descaling agent test in place shows that the corrosion speed of on-the-spot tube bank has reached 0.075mm/a).Simultaneously the amount of consumption of drugs of RH-2 corrosion inhibiting and descaling agent has also obtained reduction (conventional formulation medicament operation concentration be about 50ppm and the operation concentration of RH-2 corrosion inhibiting and descaling agent is 25ppm)
Because the development of corrosion inhibiting and descaling agent is special corrosion and the scale problems that solves present domestic petroleum chemical plant surface evaporation air cooling with exploitation.Show that through industrial experiment this agent anti-corrosion anti-scale is effective, can solve the corrosion and the scale problems of surface evaporation air cooling, can prolong the work-ing life of surface evaporation air cooling simultaneously.Because surface evaporation air cooling is domestic northwest petrochemical complex widely used cold exchange device recent years.
Concrete enforcement
The corrosion inhibiting and descaling agent technical indicator
The component index
Zinc sulfate (weight ratio/%) 15～25
Vinylformic acid-acrylic acid esters co-polymer (weight ratio/%) 30～36
Hydroxyl 1-1-ethylidene diphosphonic acid (weight ratio/%) 34～46
Benzotriazole (weight ratio/%) 4～6
Density (g/cm
3) 1.30 ± 0.10
PH value (1% aqueous solution) 0.98～1.23
Following standard is adopted in the corrosion inhibiting and descaling agent assessment of performance: (following zinc sulfate is that first, vinylformic acid-acrylic acid esters co-polymer is that second, hydroxyl 1-1-ethylidene diphosphonic acid are third, benzotriazole be fourth)
HG/T 2159-91 " the mensuration rotary hanging plate method of water conditioner corrosion inhibition "
GB50050-95 " Code for design of industrial recirculating cooling water treatment "
The corrosion inhibition of different ingredients
| (each component is by 10 * 10 for different formula rates -6g/g) | Formula concentration 10 * 10 -6g/g | Corrosion speed (mm/a) | |||
| First | Second | Third | Fourth | ||
| ????3.75 | ????7.50 | ????8.50 | ????1.00 | ??20.75 | ????0.1140 |
| ????5.00 | ????8.50 | ????10.25 | ????1.25 | ??25 | ????0.0653 |
| ????6.25 | ????9.00 | ????11.5 | ????1.50 | ??28.25 | ????0.0702 |
Claims (3)
1. special corrosion and scale inhibitor for surface evaporation air cooling, it is characterized in that: it is as follows to fill a prescription: include zinc sulfate, vinylformic acid-acrylic acid esters co-polymer: hydroxyl 1-1-ethylidene diphosphonic acid, benzotriazole, (%) is as follows for its weight proportion:
Zinc sulfate: 15～25
Vinylformic acid-acrylic acid esters co-polymer: 30～36
Hydroxyl 1-1-ethylidene diphosphonic acid: 34～46
Benzotriazole: 4～6
2. special corrosion and scale inhibitor for surface evaporation air cooling according to claim 1 is characterized in that: corrosion inhibiting and descaling agent pH value (1% aqueous solution) is 0.98～1.23.
3. special corrosion and scale inhibitor for surface evaporation air cooling according to claim 1 is characterized in that: the density (g/cm of corrosion inhibiting and descaling agent
3) be 1.30 ± 0.10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021178402A CN1176862C (en) | 2002-05-23 | 2002-05-23 | Special corrosion and scale inhibitor for surface evaporation air cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021178402A CN1176862C (en) | 2002-05-23 | 2002-05-23 | Special corrosion and scale inhibitor for surface evaporation air cooling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1459424A true CN1459424A (en) | 2003-12-03 |
| CN1176862C CN1176862C (en) | 2004-11-24 |
Family
ID=29426708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021178402A Expired - Fee Related CN1176862C (en) | 2002-05-23 | 2002-05-23 | Special corrosion and scale inhibitor for surface evaporation air cooling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1176862C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280429B (en) * | 2007-04-02 | 2011-04-13 | 宜兴市星光化工厂 | Composite type sodium polysulfide corrosion inhibitor and preparation thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986456B (en) * | 2005-12-23 | 2010-12-22 | 余新军 | Slow released scale inhibitor and its production process and usage |
-
2002
- 2002-05-23 CN CNB021178402A patent/CN1176862C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280429B (en) * | 2007-04-02 | 2011-04-13 | 宜兴市星光化工厂 | Composite type sodium polysulfide corrosion inhibitor and preparation thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1176862C (en) | 2004-11-24 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041124 Termination date: 20210523 |
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| CF01 | Termination of patent right due to non-payment of annual fee |