CN103451660B - A kind of method improving inhibiter performance in industrial cooling circulating water system - Google Patents
A kind of method improving inhibiter performance in industrial cooling circulating water system Download PDFInfo
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- CN103451660B CN103451660B CN201310365339.7A CN201310365339A CN103451660B CN 103451660 B CN103451660 B CN 103451660B CN 201310365339 A CN201310365339 A CN 201310365339A CN 103451660 B CN103451660 B CN 103451660B
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- inhibiter
- cooling circulating
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- circulating water
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Abstract
The present invention discloses a kind of method improving inhibiter performance in industrial colling system, namely a kind of electromagnetic water treating device is adopted, the work ruhmkorff coil of electromagnetic water treating device is installed on the water inlet of the heat exchanger device in industrial colling system, under electromagnetic field effect, the inhibiter in industrial colling system is made to demonstrate better corrosion inhibition, namely generated an electromagnetic field by application electromagnetic water treating device, inhibiter is made to produce synergism, not only can play better provide protection to heat exchange surface metal, the usage quantity of inhibiter can also be reduced, thus reach cost-saving, reduce the object of medicament discharge.
Description
Technical field
The present invention relates to a kind of method improving inhibiter performance in industrial colling system, belong to metal corrosion and protection technical field.
Background technology
Often there is the problems such as fouling, corrosion and microbial growth in industrial circulating cooling water system, particularly after concentration rate improves, these problems seem particularly outstanding in operational process, usually adopts the method for adding water treatment agent to control at present.Inhibiter is the important component part of recirculating cooling water system water treatment agent, and the inhibiter of usual copper alloy is the adsorption corrosion inhibitor such as benzotriazole (BTA), 2-mercaptobenzothiazole (MBT), and its working concentration is respectively 2-3mg/L and 3-5mg/L.The inhibiter of iron and steel metalloid is the passivation such as molybdate, tungstate type inhibiter.The use of inhibiter controls corrosion of metal problem in recirculating cooling water system operational process preferably, but the use of chemical agent one side cost is higher, on the other hand can to environment.
Magnetic field water treatment technology belongs to mechanical water treatment technology, is mainly used in scale removal and the scale inhibition of cooling water system, also can plays certain germicidal action.Due to it, to have investment relatively few, and operation and maintenance cost is low, the advantages such as green, environmental protection, is applied boiler and pipeline-used water, industrial circulating cooling water, central air-conditioning cooling water etc. are multi-field at present.Magnetic treatment can increase dissolved oxygen concentration in water coolant, improves cooling electrical conductivity of water, and therefore, simple magnetic treatment can make the corrosion speed of the metal such as brass and carbon steel in water coolant increase.But containing in the water coolant of inhibiter, the lorentz's force that electromagnetic field is formed, by changing the polarity of inhibitor molecular, improves the adsorptive power of inhibitor molecular in metallic surface; Or by changing the physicochemical property of water, promoting that inhibitor molecular and metallic surface act on being formed and stablizing passive film.
Summary of the invention
The object of this invention is to provide a kind of method improving inhibiter performance in industrial cooling circulating water system, namely electromagnetic water treating device is adopted, the corrosion inhibition rate of inhibiter in industrial cooling circulating water system is improved under electromagnetic field effect, and reduce inhibiter usage quantity, thus reach cost-saving, reduce medicament discharge object.
Know-why of the present invention
A kind of method improving inhibiter performance in industrial cooling circulating water system, namely a kind of electromagnetic water treating device is adopted, the work ruhmkorff coil of electromagnetic water treating device is installed on the water inlet of heat exchanging apparatus, under electromagnetic field effect, changed the polarity of inhibitor molecular by lorentz's force, improve the adsorptive power of inhibitor molecular in metallic surface; Or by changing the physicochemical property of water, promoting that inhibitor molecular and metallic surface act on being formed and stablizing passive film, improving the inhibiter performance in industrial cooling circulating water system.
Technical scheme of the present invention
A kind of method improving inhibiter performance in industrial cooling circulating water system, namely a kind of frequency conversion direct current pulse electromagnetic water treating device is adopted, and the working coil of frequency conversion direct current pulse electromagnetic water treating device is installed on the water inlet of the heat exchanging apparatus of industrial cooling circulating water system, and controlled to carry out Electromagnetic Continuous process by the impulse of current intensity of coil and frequency to the water coolant containing inhibiter by the DC pulse generator of frequency conversion direct current pulse electromagnetic water treating device;
Described heat exchanging apparatus is the condenser of thermal power plant, central air conditioning cooling water system, evaporative cooler and other various types of recirculating cooling water system;
The material of described heat exchanging apparatus is stainless steel, brass or carbon steel;
Water coolant in described heat exchanging apparatus is fresh water, brackish water or seawater;
Inhibiter in described industrial cooling circulating water system is adsorbed film type inhibiter or passivation membranous type inhibiter;
Described adsorbed film type inhibiter is benzotriazole or 2-mercaptobenzothiazole; The concentration of the inhibiter benzotriazole in described industrial cooling circulating water system is 0.5-5mg/L, and the concentration of 2-mercaptobenzothiazole is 1-5mg/L.Namely the working concentration lower limit of these two kinds of inhibiter is lower than 2mg/L and 3mg/L when not adopting electromagnetic treatment;
Described passivation membranous type inhibiter is molybdate or tungstate, and its working concentration and molybdate are 20-150mg/L, and tungstate is 20-150mg/L;
Described frequency conversion direct current pulse electromagnetic water treating device, its power supply is electric main 220V, 50Hz, and operating voltage is direct current 10-15V, and output rating is 100-300W, and variable frequency range is 20Hz ~ 75KHz, and carrier frequency is 1MHz.
Beneficial effect of the present invention
A kind of method improving inhibiter performance in industrial cooling circulating water system of the present invention; generated an electromagnetic field by application electromagnetic water treating device; inhibiter is made to produce synergism; not only can play better provide protection to the metal on heat exchanging apparatus surface; the usage quantity of inhibiter can also be reduced, thus reach cost-saving, reduce medicament discharge object.In a preferred embodiment of the invention, electromagnetic treatment is adopted to water coolant in industrial cooling circulating water system, the corrosion inhibition of different concns inhibiter is all improved; And the electromagnetic treatment time corrosion inhibition rate of longer inhibiter is larger; Simultaneously for reaching identical corrosion mitigating effect, electromagnetic treatment can reduce the usage quantity of inhibiter benzotriazole or 2-mercaptobenzothiazole more than 25% or 33.3%.
Embodiment
Below by specific embodiment, the present invention is described in further detail, but do not limit the present invention.
Simulated cooling water used in the present embodiment mainly consists of: 20mg/LCa
2+, 6mg/LMg
2+, 122mg/LHCO
3 -, 360mg/LSO
4 2-, 300mg/LCl
-, 380mg/LNa
+.
Frequency conversion direct current pulse electromagnetic water treating device used in the embodiment of the present invention is the ZS-SP III type mechanical water treater that Shanghai Zhengang Micro-Electronic Co., Ltd. produces.
It is PARSTAT2273 electrochemical workstation (Ametek company of the U.S.) that corrosion electric current density of the present invention detects instrument used.The corrosion inhibition rate of inhibiter calculates according to the following formula:
Wherein: I
corrfor do not add inhibiter system in corrosion of metal current density;
I
corr' for adding corrosion of metal current density in the system after inhibiter.
embodiment 1
Respectively containing 0,0.5,1,2,3, in the Simulated Water of 5mg/L benzotriazole, the corrosion electric current density of brass is respectively 0.82,0.49,0.17,0.12,0.16 and 0.18 μ A/cm after testing
2, under this condition concentration be 0.5,1,2,3, the benzotriazole of 5mg/L is respectively 40.2%, 79.3%, 85.4%, 80.5% and 78.0% as calculated to the corrosion inhibition rate of brass.
embodiment 2
In blank Simulated Water, the corrosion electric current density of brass is 0.82 μ A/cm
2.After Simulated Water adopts frequency conversion direct current pulse electromagnetic water treating device to process 0.5h, 1h respectively, the corrosion electric current density of brass is 0.84 μ A/cm after testing
2.Result shows, simple electromagnetic treatment does not have corrosion inhibition to brass;
Described frequency conversion direct current pulse electromagnetic water treating device, its power supply is electric main 220V, 50Hz, and operating voltage is direct current 10-15V, and output rating is 100-300W, and variable frequency range is 20Hz ~ 75KHz, and carrier frequency is 1MHz.
embodiment 3
Respectively containing 0,0.5,1,1.5,2,3, the Simulated Water of 5mg/L benzotriazole, after frequency conversion direct current pulse electromagnetic water treating device process 0.5h, the corrosion electric current density of brass is respectively 0.84,0.27,0.13,0.11,0.084,0.12 and 0.095 μ A/cm after testing
2, under this condition concentration be 0.5,1,2,3, the benzotriazole of 5mg/L is respectively 67.9%, 84.5%, 86.9%, 90.0%, 85.7% and 88.7% as calculated to the corrosion inhibition rate of brass;
Described frequency conversion direct current pulse electromagnetic water treating device, its power supply is electric main 220V, 50Hz, and operating voltage is direct current 10-15V, and output rating is 100-300W, and variable frequency range is 20Hz ~ 75KHz, and carrier frequency is 1MHz.
Contrasted by above-described embodiment 1, embodiment 2 and embodiment 3, result shows:
Simple employing benzotriazole and when not adopting electromagnetic treatment, when benzotriazole concentration is 2mg/L, it is 85.4% to the maximum to the corrosion inhibition rate of brass;
Simple electromagnetic treatment does not have rust inhibition to brass;
And under electromagnetic field effect, the benzotriazole of different concns all improves to the corrosion inhibition rate of brass, when particularly benzotriazole concentration is 2mg/L, corrosion inhibition rate brings up to 90.0%.And under electromagnetic field effect; the benzotriazole adopting 1.5mg/L is 86.9% to the corrosion inhibition rate of brass; exceed the maximum corrosion inhibition rate 85.4% during simple employing benzotriazole process; be and reach identical protected effect; electromagnetic treatment can reduce the usage quantity more than 25% of benzotriazole, thus reach cost-saving, reduce medicament discharge object.
embodiment 4
Containing the Simulated Water of 2mg/L benzotriazole, after frequency conversion direct current pulse electromagnetic water treating device process 1h, the corrosion electric current density of brass is 0.080 μ A/cm after testing
2, corrosion inhibition rate is 90.5% as calculated;
Described frequency conversion direct current pulse electromagnetic water treating device, its power supply is electric main 220V, 50Hz, and operating voltage is direct current 10-15V, and output rating is 100-300W, and variable frequency range is 20Hz ~ 75KHz, and carrier frequency is 1MHz.
embodiment 5
Containing the Simulated Water of 2mg/L benzotriazole, after frequency conversion direct current pulse electromagnetic water treating device process 4h, the corrosion electric current density of brass is 0.077 μ A/cm after testing
2, corrosion inhibition rate is 90.8% as calculated;
Described frequency conversion direct current pulse electromagnetic water treating device, its power supply is electric main 220V, 50Hz, and operating voltage is direct current 10-15V, and output rating is 100-300W, and variable frequency range is 20Hz ~ 75KHz, and carrier frequency is 1MHz.
embodiment 6
Containing the Simulated Water of 2mg/L benzotriazole, after frequency conversion direct current pulse electromagnetic water treating device process 8h, the corrosion electric current density of brass is 0.072 μ A/cm after testing
2, corrosion inhibition rate is 91.4% as calculated;
Described frequency conversion direct current pulse electromagnetic water treating device, its power supply is electric main 220V, 50Hz, and operating voltage is direct current 10-15V, and output rating is 100-300W, and variable frequency range is 20Hz ~ 75KHz, and carrier frequency is 1MHz.
By contrasting containing the result in the Simulated Water of 2mg/L benzotriazole and embodiment 4, embodiment 5 and embodiment 6 in above-described embodiment 3, result is showing that the prolongation of electromagnetic treatment time can improve the corrosion inhibition of inhibiter.
embodiment 7
Respectively containing 0,1,2,3, in the Simulated Water of the 2-mercaptobenzothiazole of 5mg/L, the corrosion electric current density of brass is respectively 0.82,0.70,0.19,0.060 and 0.054 μ A/cm after testing
2, under this condition concentration be 1,2,3, the 2-mercaptobenzothiazole of 5mg/L is respectively 14.6%, 76.8%, 92.7% and 93.4% as calculated to the corrosion inhibition rate of brass.
embodiment 8
Respectively containing 0,1,2,3, the Simulated Water of the 2-mercaptobenzothiazole of 5mg/L, after frequency conversion direct current pulse electromagnetic water treating device process 0.5h, the corrosion electric current density of brass is respectively 0.84,0.32,0.046,0.044 and 0.041 μ A/cm after testing
2, under this condition concentration be 1,2,3, the 2-mercaptobenzothiazole of 5mg/L is respectively 61.9%, 94.5%, 94.8% and 95.1% as calculated to the corrosion inhibition rate of brass;
Described frequency conversion direct current pulse electromagnetic water treating device, its power supply is electric main 220V, 50Hz, and operating voltage is direct current 10-15V, and output rating is 100-300W, and variable frequency range is 20Hz ~ 75KHz, and carrier frequency is 1MHz.
By the contrast of above-described embodiment 7 with embodiment 8, result shows to adopt 2-mercaptobenzothiazole merely, it increases with the increase of concentration the corrosion inhibition rate of brass, and maximum corrosion inhibition rate is 93.4%, and the Cmin that corrosion inhibition rate is greater than the 2-mercaptobenzothiazole needed for 90% is 3mg/L; Under electromagnetic field effect, the 2-mercaptobenzothiazole of different concns all improves to the situation of the corrosion inhibition rate of brass relative to non-electromagnetic field effect, when 2-mercaptobenzothiazole concentration is 1mg/L, corrosion inhibition rate brings up to 61.9% electromagnetic field effect from 14.6% of non-electromagnetic field effect, and when concentration is 2mg/L, corrosion inhibition rate brings up to 94.5% electromagnetic field effect from 76.8% of non-electromagnetic field effect.Under electromagnetic field effect, corrosion inhibition rate is greater than the Cmin of the 2-mercaptobenzothiazole needed for 90% from the process of 3mg/L(non-electromagnetic field) be reduced to 2mg/L, namely electromagnetic treatment can reduce inhibiter usage quantity 33.3%.
In sum, a kind of method improving circulating cooling aqueous systems inhibiter performance of the present invention, namely adopts electromagnetic treatment to water coolant, the corrosion inhibition of different concns inhibiter can be made all to improve; The electromagnetic treatment time corrosion inhibition rate of longer inhibiter is larger; Simultaneously for reaching identical corrosion mitigating effect, electromagnetic treatment can reduce the usage quantity of benzotriazole or 2-mercaptobenzothiazole more than 25% or 33.3%.
In above-described embodiment, be only that material is illustrated with brass, but do not limit the invention in the application on stainless steel or the carbon steel heat-exchange equipment that is material;
In addition, above-mentioned also only with adsorbed film type inhibiter, namely benzotriazole or 2-mercaptobenzothiazole use a kind of method improving recirculating cooling water system inhibiter performance of the present invention to illustrate in the heat exchanging apparatus of brass material, but do not limit the method for raising recirculating cooling water system inhibiter performance of the present invention at use passivation membranous type inhibiter, i.e. the application on the heat-exchange equipment of iron and steel metalloid material such as molybdate or tungstate.
Above said content be only the present invention conceive under basic explanation, and according to any equivalent transformation that technical scheme of the present invention is done, all should protection scope of the present invention be belonged to.
Claims (5)
1. one kind is improved the method for inhibiter performance in industrial cooling circulating water system, it is characterized in that adopting a kind of frequency conversion direct current pulse electromagnetic water treating device, the work ruhmkorff coil of frequency conversion direct current pulse electromagnetic water treating device is installed on the water inlet of the heat exchanger device in industrial cooling circulating water system, and is controlled to carry out Electromagnetic Continuous process by the impulse of current intensity of coil and frequency to the water coolant containing inhibiter by the DC pulse generator of frequency conversion direct current pulse electromagnetic water treating device;
The material of the heat exchanger device in described industrial cooling circulating water system is stainless steel, brass or carbon steel;
Inhibiter in described industrial cooling circulating water system is adsorbed film type inhibiter or passivation membranous type inhibiter;
Described adsorbed film type inhibiter is benzotriazole or 2-mercaptobenzothiazole;
Described passivation membranous type inhibiter is molybdate or tungstate.
2. a kind of method improving inhibiter performance in industrial cooling circulating water system as claimed in claim 1, it is characterized in that described frequency conversion direct current pulse electromagnetic water treating device, its power supply is electric main 220V, 50Hz, operating voltage is direct current 10-15V, output rating is 100-300W, variable frequency range is 20Hz ~ 75KHz, and carrier frequency is 1MHz.
3. a kind of method improving inhibiter performance in industrial cooling circulating water system as claimed in claim 1, is characterized in that the water coolant in described heat exchanging apparatus is fresh water, brackish water or seawater.
4. a kind of method improving inhibiter performance in industrial cooling circulating water system as claimed in claim 1, is characterized in that the concentration of the inhibiter benzotriazole in described industrial cooling circulating water system is 0.5-5mg/L; The concentration of 2-mercaptobenzothiazole is 1-5mg/L.
5. a kind of method improving inhibiter performance in industrial cooling circulating water system as claimed in claim 1, is characterized in that the concentration of the inhibiter molybdate in described industrial cooling circulating water system is 20-150mg/L, and the concentration of tungstate is 20-150mg/L.
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| CN101962243A (en) * | 2010-09-13 | 2011-02-02 | 上海电力学院 | Industrial boiler water treatment method |
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| CN101948188A (en) * | 2010-09-13 | 2011-01-19 | 上海电力学院 | Environmentally-friendly water treatment method of scale inhibition and corrosion inhibition of industrial boiler |
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Non-Patent Citations (2)
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| "BTA及其复配铜缓蚀剂的研究进展";张娟 等;《材料导报》;20080930;第22卷(第9期);全文 * |
| "磁化与化学加药联合水处理技术";刘振法 等;《节能与环保》;20060731(第7期);第1页右栏第1段，第2页左栏第3、6段，第3页左栏第2、4段，第3页右栏第1－3、5段，表1－2 * |
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