CN104016492A - Environment-friendly composite efficient corrosion inhibition dispersant for soft water closed-circulating cooling water system - Google Patents
Environment-friendly composite efficient corrosion inhibition dispersant for soft water closed-circulating cooling water system Download PDFInfo
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- CN104016492A CN104016492A CN201310062450.9A CN201310062450A CN104016492A CN 104016492 A CN104016492 A CN 104016492A CN 201310062450 A CN201310062450 A CN 201310062450A CN 104016492 A CN104016492 A CN 104016492A
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- cooling water
- corrosion inhibition
- water
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- dispersion agent
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Abstract
The invention belongs to the technical field of industrial circulation cooling water treatment and in particular relates to an environment-friendly composite efficient corrosion inhibition dispersant for a soft water closed-circulating cooling water system. The corrosion inhibition dispersant is prepared by compounding molybdate, borate, strong alkali, carbonate, silicate and benzotriazole. Due to a compounding synergistic effect, a corrosion inhibition synergistic effect is brought into play to the maximum extent; a layer of dense corrosion inhibition protection film is formed on the metal surface so as to prevent further corrosion of corrosion ions in water; the water treatment cost is reduced; the corrosion inhibition dispersant is nontoxic and pollution-free.
Description
Technical field
The invention belongs to technology of industrial recirculating cooling water treatment field, be specifically related to a kind of for closed loop sofe water cooling water system environmental protection composite efficient inhibition dispersion agent.
background technology
In industrial circulating cooling water process field, the degree of water quality fouling and the corrosion to equipment changes along with the difference of circulating cooling water quality and supplementary water quality.For recirculating cooling water system, water coolant is constantly recycling in process, due to concentrating of mineral ion and organic substance, cooling tower and water cooling pond are in the outdoor solar radiation that is subject to, wind and weather, descending slowly and lightly of dust foreign material, and the comprehensive action of the many factors such as device structure and material, can produce serious incrustation scale adheres to, growing in a large number of equipment corrosion and bacterium algae microorganism, and the harm such as foundry loam dirt blocking pipe forming thus, and circulating water treatment is exactly to address these problems by the way of water conditioning, even if ensure that recirculating cooling water system also can normally move safely under high concentration multiple.In some industry, because the device being cooled is special or the reason such as the temperature height of medium, usually need with softening water as circulating cooling water quality, as the recirculated cooling water of the recirculated cooling water of the recirculated cooling water of the continuous cast mold of steel industry, nuclear power generating system, metallurgy industry oxygen rifle, the recirculated cooling water of floatation glass production line, the recirculated cooling water of central air conditioner system.The calcium hardness of softening water is generally 0～20mgL
-1(with CaCO
3meter), total alkalinity≤100mgL
-1(with CaCO
3meter), pH6.0～7.5, specific conductivity≤150uscm
-1.The distinguishing feature of softening water is non-scaling, but extremely strong to corrosion of metal, belongs to severe corrosive water, during for industrial circulating cooling water, and can be up to 2.0mma to the erosion rate of carbon steel
-1above.In order to solve the etching problem of this water quality to hardware, once adopted chromic salt or the nitrite of high density to process softening water, the method successful, after processing, water quality can be less than 0.025mm/ to the erosion rate of carbon steel metalloid, but a nitrite chromic salt belongs to strong carcinogen, and environmental pollution is serious.
Processing to this class corrodibility soft water at present, the traditional treatment process of domestic main employing, taking inorganic polyphosphate Sodium hexametaphosphate 99 as host, formula taking hydroxy ethylene phosphonic acids, polyacrylic acid, zinc salt as assistant agent, this formula need to be replenished the calcium and could be strengthened corrosion inhibition, and need acid adding control pH to control the precipitation of calcium phosphate, operation and management are very strict.External many water treatment company usually adopts taking molybdate as host, is aided with the compound prescription of a certain amount of dispersion agent, and when use, concentration is conventionally up to 1500mgL
-1.This formula does not need to replenish the calcium, does not need to regulate pH, and single this formula consumption is large, and processing costs is high.
Along with the raising of people's environmental consciousness, researchist makes great efforts the substitute of the phosphorous corrosion inhibiting and descaling agent of studying poisonous inhibiter chromic salt and nitrite, and it develops from poly-phosphate, organophosphate to organophosphorus carboxylic acid, and phosphorus content reduces gradually.Now nontoxic, pollute little, environmentally acceptable water treatment agent and be constantly found out as polymeric dispersant as polyacrylic acid, acrylic copolymer, but they are due to accumulation for a long time in environment, still have potential hazard.
In order to reach the object of environmental protection, the present invention adopts the inorganic salts such as molybdate, borate, highly basic, carbonate as main component, not only there is inhibition dissemination, using inorganics as main component facile hydrolysis, and without phosphorus, without zinc, without nitrite, not containing organic chemicals, this formula is complete environmental protection composite efficient inhibition dispersion agent, have not been reported for the treatment of the low hard soft water recirculated cooling water of low alkali.
Summary of the invention
The object of the present invention is to provide a kind of without phosphorus, without zinc, without nitrite, not containing organic chemicals, facile hydrolysis, have the environmental protection composite efficient inhibition dispersion agent that can be used for closed loop sofe water cooling water system of splendid corrosion inhibition.
For achieving the above object, the technical solution used in the present invention is compound inhibition dispersion agent, and this formula is by molybdate, borate, highly basic, carbonate, silicate, benzotriazole composition.Wherein molybdate 2～10%, borate 5～20%, highly basic 10～35%, carbonate 20～45%, silicate 2～10%, benzotriazole 2～5%.
Borate, carbonate, the silicate that the present invention adopts is all one or more in sodium salt or sylvite, and this highly basic is one or more of sodium hydroxide or potassium hydroxide.
The benzotriazole structural formula that the present invention adopts is:
The present invention adds medicament powder in stainless steel mixing agitator and uniformly mixes successively by above-mentioned medicament proportioning and order.
Composite efficient inhibition dispersion agent of the present invention is applicable in the soft ring water system of enclosed, and adding of agent concentration is 500-1000mgL
-1, maintain under this concentration and can move all the year round.
Composite efficient inhibition dispersion agent of the present invention is added in the soft ring water system of enclosed, between each medicament, has obvious synergistic function:
1. first improve soft ring water system basicity and pH value by highly basic, carbonate, make the corrosion tendency of water be converted into weak erosive tendency by extremely strong corrodibility.
2. by the rational proportion collocation of molybdate, borate, silicate in compound prescription, make it to bring into play maximum inhibition synergism, form the inhibition protection film of one deck densification in metallic surface, the further erosion of corroding ion in anti-sealing.
3. owing to not containing inorganic phosphate and organic phosphine, nitrite, organic chemicals etc. in reagent combination, the possibility of microbial growth and breeding reduces greatly, microbiological corrosion and biological clay problem are alleviated, can reduce widely adding frequency and adding concentration of sterilant, thereby reduce the running cost of water treatment.
Composite efficient inhibition dispersion agent provided by the invention is specially adapted to process the recirculating cooling water system taking low alkali, low hard soft water as water quality, and the soft water of this severe corrosive is directly processed, and benefit alkali does not need to replenish the calcium.
Composite efficient inhibition dispersion agent for the soft water recirculating cooling water system provided by the invention tool compared with prior art of filling a prescription has the following advantages: (1) composite efficient inhibition provided by the invention dispersion agent formula is formulated by inorganics, not containing inorganic phosphorus, organic phosphine and any organic chemicals, there will not be calcium phosphate scale precipitation, do not have the problem that causes body eutrophication.(2) this formula material used is inorganic sodium, sylvite substantially, and facile hydrolysis, belongs to environmental friendly product, can not endanger environment.(3) in this product, be not applicable to the toxic substance of soft water containing chromic salt, nitrite, zinc salt etc., use safety, be conducive to environment protection.(4) this inorganic compounding formula is cheap, and ton cost of water treatment is low.(5) this compound prescription corrosion mitigating effect in the soft ring water of enclosed is splendid, and its effect can match in excellence or beauty by soft ring water formula with traditional nitrite completely, is better than the soft ring water of organic phosphine formula simultaneously, is better than the organic soft ring water formula effect of polymer.(6) this products material is easy to get, compound preparation is easy, and scene adds simple to operation.
Embodiment
By mass percentage, concrete ratio range is composite efficient inhibition dispersion agent configuration proportion provided by the invention: molybdate 2～10%, borate 5～25%, highly basic 10～35%, carbonate 20～45%, silicate 2～10%, benzotriazole 2～5%.
Concrete compound method: after medicament powder being added uniformly mix in stainless steel mixing agitator successively by above-mentioned medicament proportioning and order, weighing and bagging.
Borate, carbonate, the silicate that the present invention adopts is all one or more in sodium salt or sylvite, and this highly basic is one or more of sodium hydroxide or potassium hydroxide.
Enumerating several formulation examples is below illustrated:
Formula one: molybdate 3g, borate 14g, highly basic 30g, carbonate 40g, silicate 8g, benzotriazole 5g.
Formula two: molybdate 5g, borate 12g, highly basic 30g, carbonate 40g, silicate 8g, benzotriazole 5g.
Formula three: molybdate 7g, borate 10g, highly basic 30g, carbonate 40g, silicate 8g, benzotriazole 5g.
Formula four: sodium wolframate 3g, Sodium Tetraborate 14g, sodium hydroxide 30g, sodium carbonate 40g, water glass 8g, benzotriazole 5g.
Formula five: Sodium Nitrite 70g, Sodium Benzoate 12g, Sodium orthomolybdate 2g, sodium hydroxide 4g, S-WAT 10g, benzotriazole 2g.
Formula six: BPTC (2-phosphonic acid butane-1,2,4-tricarboxylic acid) 10g, HEDP (1-Hydroxy Ethylidene-1,1-Diphosphonic Acid) 10g, Sodium orthomolybdate 5g, zinc sulfate 10g, PAPE (PAPE) 15g, benzotriazole 1g, soft water 49g.
Above-mentioned formula is made to sample, and test by the mensuration rotary hanging plate method of GB18175-2000-T water conditioner corrosion inhibition, test result is in table 1.
Concrete test conditions
Instrument and equipment: RCC-II type rotary hanging plate corrosion test instrument, electronic balance etc.
Test temperature: 50 DEG C
Test period: 72 hours
Test water: on-the-spot industrial soft water: the pH7.85 of Steel Plant, specific conductivity 325 μ s/cm, total hardness is (with CaCO
3meter) 25mg/L,
Calcium hardness is (with CaCO
3meter) 12mg/L, total alkalinity 40mg/L, chlorion 20mg/L, SO
4 2-19.1mg/L.
Test lacing film: I type carbon steel, brass, red copper.
Test result: in table 1.
Table 1 test result
Claims (4)
1. for a closed loop sofe water cooling water system environmental protection composite efficient inhibition dispersion agent, it is characterized in that described environmental protection composite efficient inhibition dispersion agent is by molybdate, borate, highly basic, carbonate, silicate, benzotriazole composition.
2. environmental protection composite efficient inhibition dispersion agent according to claim 1, it is characterized in that by mass percentage, the component of this inhibition dispersion agent comprises: molybdate 2～10%, borate 5～20%, highly basic 10～35%, carbonate 20～45%, silicate 2～10%, benzotriazole 2～5%.
3. environmental protection composite efficient inhibition dispersion agent according to claim 1, is characterized in that molybdate, borate, carbonate, silicate in this formula are all one or more in sodium salt or sylvite; This highly basic is one or more of sodium hydroxide or potassium hydroxide.
4. according to claim 1 for closed loop sofe water cooling water system environmental protection composite efficient inhibition dispersion agent, it is characterized in that the structural formula of described benzotriazole is:
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310062450.9A CN104016492A (en) | 2013-02-28 | 2013-02-28 | Environment-friendly composite efficient corrosion inhibition dispersant for soft water closed-circulating cooling water system |
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|---|---|---|---|
| CN201310062450.9A CN104016492A (en) | 2013-02-28 | 2013-02-28 | Environment-friendly composite efficient corrosion inhibition dispersant for soft water closed-circulating cooling water system |
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| CN104016492A true CN104016492A (en) | 2014-09-03 |
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ID=51433552
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|---|---|---|---|
| CN201310062450.9A Pending CN104016492A (en) | 2013-02-28 | 2013-02-28 | Environment-friendly composite efficient corrosion inhibition dispersant for soft water closed-circulating cooling water system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668812A (en) * | 2016-02-04 | 2016-06-15 | 江苏盛世水业有限公司 | Corrosion and scale inhibition sterilizing agent for circulating cooling water under high concentration multiple |
| CN107673489A (en) * | 2017-11-14 | 2018-02-09 | 昌邑市龙港无机硅有限公司 | A kind of recirculated water corrosion inhibiting and descaling agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001145889A (en) * | 1999-07-16 | 2001-05-29 | Kirishima Doboku:Kk | Water activating device and circulating water cooling system using the same |
| CN101125713A (en) * | 2006-08-18 | 2008-02-20 | 中国石油化工股份有限公司 | Corrosion inhibitor used for closed circulation water system |
| CN101734805A (en) * | 2009-12-15 | 2010-06-16 | 娄底市裕德科技有限公司 | Antiincrustation corrosion inhibitor for treating circulating cooling water |
| CN102476871A (en) * | 2010-11-24 | 2012-05-30 | 中国石油化工股份有限公司 | Treatment process of circulating cooling water with leaked ammonia nitrogen |
-
2013
- 2013-02-28 CN CN201310062450.9A patent/CN104016492A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001145889A (en) * | 1999-07-16 | 2001-05-29 | Kirishima Doboku:Kk | Water activating device and circulating water cooling system using the same |
| CN101125713A (en) * | 2006-08-18 | 2008-02-20 | 中国石油化工股份有限公司 | Corrosion inhibitor used for closed circulation water system |
| CN101734805A (en) * | 2009-12-15 | 2010-06-16 | 娄底市裕德科技有限公司 | Antiincrustation corrosion inhibitor for treating circulating cooling water |
| CN102476871A (en) * | 2010-11-24 | 2012-05-30 | 中国石油化工股份有限公司 | Treatment process of circulating cooling water with leaked ammonia nitrogen |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668812A (en) * | 2016-02-04 | 2016-06-15 | 江苏盛世水业有限公司 | Corrosion and scale inhibition sterilizing agent for circulating cooling water under high concentration multiple |
| CN107673489A (en) * | 2017-11-14 | 2018-02-09 | 昌邑市龙港无机硅有限公司 | A kind of recirculated water corrosion inhibiting and descaling agent |
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Application publication date: 20140903 |