CN102367576B - EDTA (Ethylene Diamine Tetraacetic Acid) low-temperature cleaning aid and application thereof - Google Patents
EDTA (Ethylene Diamine Tetraacetic Acid) low-temperature cleaning aid and application thereof Download PDFInfo
- Publication number
- CN102367576B CN102367576B CN 201110365539 CN201110365539A CN102367576B CN 102367576 B CN102367576 B CN 102367576B CN 201110365539 CN201110365539 CN 201110365539 CN 201110365539 A CN201110365539 A CN 201110365539A CN 102367576 B CN102367576 B CN 102367576B
- Authority
- CN
- China
- Prior art keywords
- edta
- auxiliary agent
- low
- temperature
- temperature cleaning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 77
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229960001484 edetic acid Drugs 0.000 title abstract 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000012752 auxiliary agent Substances 0.000 claims description 32
- 230000002000 scavenging effect Effects 0.000 claims description 28
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 22
- -1 polyoxyethylene octylphenol Polymers 0.000 claims description 22
- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 claims description 11
- 238000002161 passivation Methods 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 abstract 4
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 abstract 2
- 239000002202 Polyethylene glycol Substances 0.000 abstract 2
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 abstract 2
- 229920001223 polyethylene glycol Polymers 0.000 abstract 2
- 229940051841 polyoxyethylene ether Drugs 0.000 abstract 2
- 229920000056 polyoxyethylene ether Polymers 0.000 abstract 2
- 239000000243 solution Substances 0.000 description 17
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229940124274 edetate disodium Drugs 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
Abstract
The invention belongs to the field of chemical cleaning of boilers, and provides an aid for reducing chemical cleaning temperature of EDTA (Ethylene Diamine Tetraacetic Acid) and application of the aid. The EDTA low-temperature cleaning aid comprises the following components in percent by weight: 43-47 percent of nonylphenol polyethylene glycol ether, 18-22 percent of octylphenol polyoxyethylene ether and the balance of water, wherein the polymerization degree of the nonylphenol polyethylene glycol ether is 9-11, and the polymerization degree of the octylphenol polyoxyethylene ether is 9-11. After 1-1.5 percent of EDTA low-temperature cleaning aid provided by the invention is added to an EDTA cleaning solution, the cleaning temperature is reduced to 75-85 DEG C from 135-140 DEG C of the traditional process, so that the heating more is more flexible and heating is more uniform, and the average corrosion speed is reduced by 50 percent. The EDTA low-temperature cleaning aid provided by the invention is simple, convenient and safe in process.
Description
Technical field
The invention belongs to the Boiler Chemical field, be specifically related to a kind of auxiliary agent and application thereof of the EDTA of reduction matting temperature.
Background technology
According to the requirement of " heat power plant boiler matting guide rule " (DL/T 794-2001), to capital construction and operating unit, all tackle boiler body, economizer, stokehold water feeding system and carry out respectively matting.Wherein, to boiler body and economizer system, generally adopt the organic acid cleanings such as the mineral acid cleanings such as hydrochloric acid, hydrofluoric acid, sulfuric acid and thionamic acid, EDTA, oxyacetic acid, the stokehold water feeding system is generally adopted the organic acid cleanings such as citric acid.
To the new unit as leading take environment-friendly type and zero blowdown type, should adopt the EDTA cleaning.When adopting EDTA to clean, in order to improve cleaning reaction speed, all improving cleaning temperature as far as possible.And the fusing point of EDTA is 240 ℃, the tendency of decomposition is just being arranged more than 150 ℃, therefore by traditional E DTA cleaning, namely " heat power plant boiler matting guide rule " regulation EDTA cleaning must be carried out at 135～140 ℃, under this cleaning temperature, boiler need to possess ignition condition and booste operation just can be finished cleaning.
For the capital construction unit, when boiler possessed ignition condition, a whole set of test run work main threads was more, and cross interference is larger mutually.If clean, just must stop other work and postpone the duration for it.In order to accelerate the operation progress, urgent hope does not possess under the ignition condition at boiler ensuring the quality of products and not increasing under the prerequisite of waste liquid disposal facility, namely still can use at low temperatures EDTA to clean.
Summary of the invention
The present invention will solve traditional E DTA cleaning will 135～140 ℃ of technical problems that just can carry out, provide a kind of EDTA Low-temperature cleaning auxiliary agent and application thereof.
The present invention realizes that the technical scheme of above-mentioned purpose is as follows:
A kind of EDTA Low-temperature cleaning auxiliary agent, wherein the mass percent of each component is: the polyoxyethylene octylphenol ether of 43～47% polyoxyethylene nonylphenol ether, 18～22 %, surplus are water, wherein, the polymerization degree of polyoxyethylene nonylphenol ether is 9～11; The polymerization degree of polyoxyethylene octylphenol ether is 9～11.
Further, the mass percent of each component is in the described EDTA Low-temperature cleaning auxiliary agent: 45% polyoxyethylene nonylphenol ether, 20% polyoxyethylene octylphenol ether, surplus are water.
Further, the polymerization degree of described polyoxyethylene nonylphenol ether is 10.
Further, the polymerization degree of described polyoxyethylene octylphenol ether is 10.
The application of above-mentioned EDTA Low-temperature cleaning auxiliary agent in Boiler Chemical.
Use the method for above-mentioned EDTA Low-temperature cleaning auxiliary agent boiler rinsing: EDTA Low-temperature cleaning auxiliary agent is added in the EDTA scavenging solution by amount of auxiliary, then the EDTA scavenging solution is squeezed into boiler systems to be cleaned, temperature during cleaning is 75～85 ℃, after cleaning end, be weakly alkaline at scavenging solution, temperature is 70～80 ℃ of lower passivation 3～5 hours, make the metallic surface form passive film, passivation can be discharged the cleaning waste liquid after finishing.
Further, described amount of auxiliary refers to that the mass percentage concentration of EDTA Low-temperature cleaning auxiliary agent in the EDTA scavenging solution is 1～1.5%.
Further, neutral or acid if scavenging solution is after cleaning finishes, should add sodium hydroxide adjusting scavenging solution and be weakly alkaline.
Further, described scavenging solution is weakly alkaline and refers to that the pH value is 8.8～9.2.
The mechanism of action of EDTA Low-temperature cleaning auxiliary agent of the present invention: the polymerization degree of selecting polyoxyethylene nonylphenol ether be 9～11 and the polymerization degree of polyoxyethylene octylphenol ether be 9～11, to be about 14 because the polymerization degree is the hydrophile-lipophile balance value (being the HLB value) of these two kinds of nonionogenic tensides of 9～11, its absorption and surface-active action are conducive to make EDTA to be enriched in the metallic surface, make the EDTA concentration of metallic surface be higher than the scavenging solution bulk concentration, realize interface EDTA Concentration Doubling effect, thereby can in the situation that do not increase in the scavenging solution EDTA concentration and do not increase scavenging period, reach the purpose that reduces cleaning temperature.The excellent surface active function that these two kinds of Composed of Non-ionic Surfactants of while have makes the EDTA of its enrichment more easily infiltrate iron rust inside, makes complexing dissolution process while row when surface and inside of rust cleaning, and then has accelerated cleaning speed.Since the present invention select for the non-ionic surfactant component, its with hydrophilic radical and hydrophobic group the greasy dirt in the boiler systems is more easily removed, make the silicon-containing materials such as dust, grit, cement lose the viscous medium that is attached to the metallic surface.Reach the purpose of using finish " oil removing, rust cleaning, silica removal, passivation " one step of EDTA scavenging solution of containing EDTA Low-temperature cleaning auxiliary agent of the present invention.
Compare with traditional E DTA cleaning, add EDTA Low-temperature cleaning auxiliary agent of the present invention after, can make cleaning temperature drop to 75～85 ℃ from traditional 135～140 ℃, make type of heating more flexible, be heated more even, average corrosion rate has reduced by 50% simultaneously, and technique is simple, convenient, safety.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
EDTA Low-temperature cleaning auxiliary agent production stage is as follows:
One, in reactor, injects 350 kg water;
Two, under constantly stirring, the polyoxyethylene nonylphenol ether of adding 450 kg in the de-mineralized water of 350 kg continues to be stirred to and mixes;
Three, under constantly stirring, add the polyoxyethylene octylphenol ether of 200 kg in the mixed solution that makes to second step, stir and namely get EDTA Low-temperature cleaning auxiliary agent.
Wherein, polyoxyethylene nonylphenol ether is commercially available NP-10, and its polymerization degree is 10, HLB value 14;
Polyoxyethylene octylphenol ether is commercially available OP-10, and its polymerization degree is 10, HLB value 14.
Embodiment 2
Embodiment 1 prepared EDTA Low-temperature cleaning auxiliary agent is applied to 300MW capital construction unit, and clean range is: stokehold water feeding system, economizer system, boiler body system.Adopt wash cycles.Chemical cleaning system is designed to: the water wall lower collecting box → temporary pipeline of the water wall of the low pressure feed water pipeline → gland heater of cleaning case → scavenging pump → temporary pipeline → condensate pump outlet → low pressure heater → deoxygenator water inlet pipe → inicdental bypath pipeline → deaerator down-take pipe → service pump water inlet pipe → inicdental bypath pipeline → service pump rising pipe → high pressure heater → economizer → drum → all around → all around → temporarily the return female pipe of liquid → return fluid valve → cleaning case.
The EDTA scavenging solution: 1.0～1.5% EDTA Low-temperature cleaning auxiliary agent, 3～5% EDETATE DISODIUM (are Na
2EDTA), 0.3～0.5% inhibiter IS-136,0.03% dithiocyano-methane (being abbreviated as MBT), 0.15～0.2% hydrazine, all the other are water.Start boiler bottom heating system, cleaning case steam heating system, low pressure heater heating system heated wash liquid to 75～85 ℃, scavenging period is 6～8 hours, specifically according to the on-the site analysis monitoring result, determines clean endpoint.After cleaning end, scavenging solution pH value can reach 8.8～9.2, is 75 ± 5 ℃ of lower passivation 3～5 hours in temperature, makes the metallic surface form passive film, and passivation will be cleaned waste liquid and drain after being finished.
Embodiment 3
The EDTA Low-temperature cleaning auxiliary agent that embodiment 1 is made is applied to 660MW capital construction unit boiler body.Clean range is: high adding system, economizer, water screen system, startup separator.The chemical cleaning circuit system is designed to: matting temporary interface → temporary pipeline before cleaning case → scavenging pump → temporary pipeline → high-pressure feed water matting interface → high pressure heater → main feed pipe road → economizer → water wall → startup separator → atmosphere flash vessel → time Yehmen (ying-Spring point SJ 2) → cleaning case.
The EDTA scavenging solution: 1.0～1.5% EDTA Low-temperature cleaning auxiliary agent, 3～5% EDETATE DISODIUM, 0.3～0.5% inhibiter SH-255,0.03% MBT, 0.15～0.2% hydrazine, all the other are water.Start boiler bottom heating system, cleaning case steam heating system, high pressure heater heating system heated wash liquid to 75～85 ℃, scavenging period is 6～8 hours, according to the on-the site analysis monitoring result, determines clean endpoint.After cleaning end, scavenging solution pH value can reach 8.8～9.2, is 75 ± 5 ℃ of lower passivation 3～5 hours in temperature, makes the metallic surface form passive film, and passivation will be cleaned waste liquid and drain after being finished.
Should be noted that, in embodiment 2 and 3, complex reaction occurs in EDETATE DISODIUM and metal oxide (such as calcium oxide, iron rust), and product has hydroxide radical (OH simultaneously
-), so scavenging solution pH value is constantly to raise in the cleaning process.After clean finishing, if scavenging solution pH value is low by 8.8, be incubated again passivation after should adding sodium hydroxide adjusting scavenging solution pH value to 8.8～9.2.
Compare with the traditional E DTA cleaning that does not add EDTA Low-temperature cleaning auxiliary agent, Low-temperature cleaning novel process of the present invention has the following advantages:
Claims (8)
1. an EDTA Low-temperature cleaning auxiliary agent is characterized in that, the mass percent of each component is in this EDTA Low-temperature cleaning auxiliary agent: the polyoxyethylene octylphenol ether of 43～47% polyoxyethylene nonylphenol ether, 18～22 %, surplus are water,
Wherein, the polymerization degree of polyoxyethylene nonylphenol ether is 9～11;
The polymerization degree of polyoxyethylene octylphenol ether is 9～11.
2. EDTA Low-temperature cleaning auxiliary agent according to claim 1 is characterized in that, the mass percent of each component is in the described EDTA Low-temperature cleaning auxiliary agent: 45% polyoxyethylene nonylphenol ether, 20% polyoxyethylene octylphenol ether, surplus are water.
3. EDTA Low-temperature cleaning auxiliary agent according to claim 1 and 2, it is characterized in that: the polymerization degree of described polyoxyethylene nonylphenol ether is 10.
4. EDTA Low-temperature cleaning auxiliary agent according to claim 1 and 2, it is characterized in that: the polymerization degree of described polyoxyethylene octylphenol ether is 10.
5. the application of EDTA Low-temperature cleaning auxiliary agent claimed in claim 1 is characterized in that: the application of described EDTA Low-temperature cleaning auxiliary agent in Boiler Chemical.
6. right to use requires the method for 1 described EDTA Low-temperature cleaning auxiliary agent boiler rinsing, it is characterized in that: EDTA Low-temperature cleaning auxiliary agent is added in the EDTA scavenging solution by amount of auxiliary, then the EDTA scavenging solution is squeezed into boiler systems to be cleaned, temperature during cleaning is 75～85 ℃, after cleaning end, be weakly alkaline at scavenging solution, temperature is 70～80 ℃ of lower passivation 3～5 hours, make the metallic surface form passive film, passivation can be discharged the cleaning waste liquid after finishing, and described weakly alkaline refers to that the pH value is 8.8～9.2.
7. the method for EDTA Low-temperature cleaning auxiliary agent boiler rinsing according to claim 6, it is characterized in that: described amount of auxiliary refers to that the mass percentage concentration of EDTA Low-temperature cleaning auxiliary agent in the EDTA scavenging solution is 1～1.5%.
8. the method for EDTA Low-temperature cleaning auxiliary agent boiler rinsing according to claim 6 is characterized in that: after cleaning end, if scavenging solution is neutrality or acid, should adds sodium hydroxide adjusting scavenging solution and be weakly alkaline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110365539 CN102367576B (en) | 2011-11-17 | 2011-11-17 | EDTA (Ethylene Diamine Tetraacetic Acid) low-temperature cleaning aid and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110365539 CN102367576B (en) | 2011-11-17 | 2011-11-17 | EDTA (Ethylene Diamine Tetraacetic Acid) low-temperature cleaning aid and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102367576A CN102367576A (en) | 2012-03-07 |
| CN102367576B true CN102367576B (en) | 2013-04-03 |
Family
ID=45760165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110365539 Active CN102367576B (en) | 2011-11-17 | 2011-11-17 | EDTA (Ethylene Diamine Tetraacetic Acid) low-temperature cleaning aid and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102367576B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425778B (en) * | 2011-10-20 | 2013-10-16 | 宁夏电力公司电力科学研究院 | Process of carrying out low-temperature chemical cleaning passivation on thermal power plant boiler by utilizing EDTA (Ethylene Diamine Tetraacetic Acid) |
| CN103510101A (en) * | 2013-09-26 | 2014-01-15 | 杨桂望 | Boiler cleaning agent |
| CN104451710A (en) * | 2014-11-26 | 2015-03-25 | 成都川硬合金材料有限责任公司 | Water-based detergent for aluminum surface |
| CN104498973A (en) * | 2014-11-26 | 2015-04-08 | 成都川硬合金材料有限责任公司 | Water-base cleaning agent for supersonic wave |
| CN104498972A (en) * | 2014-11-26 | 2015-04-08 | 成都川硬合金材料有限责任公司 | Magnesium aluminum alloy surface ultrasonic cleaning technology |
| CN105180141B (en) * | 2015-08-19 | 2017-08-18 | 中国电建集团河南工程公司 | Boiler and water supply system passivating film high-efficient cleaning system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003033764A2 (en) * | 2001-10-17 | 2003-04-24 | Atotech Deutschland Gmbh | Metallization of non-conductive surfaces with silver catalyst and electroless metal compositions |
| CN101476131A (en) * | 2009-01-21 | 2009-07-08 | 东北大学 | Foamless low temperature degreasing agent |
| CN101748465A (en) * | 2009-12-31 | 2010-06-23 | 哈尔滨工业大学 | Method for preparing coating with thermostability and high emissivity on titanium alloy substrate |
-
2011
- 2011-11-17 CN CN 201110365539 patent/CN102367576B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003033764A2 (en) * | 2001-10-17 | 2003-04-24 | Atotech Deutschland Gmbh | Metallization of non-conductive surfaces with silver catalyst and electroless metal compositions |
| CN101476131A (en) * | 2009-01-21 | 2009-07-08 | 东北大学 | Foamless low temperature degreasing agent |
| CN101748465A (en) * | 2009-12-31 | 2010-06-23 | 哈尔滨工业大学 | Method for preparing coating with thermostability and high emissivity on titanium alloy substrate |
Non-Patent Citations (2)
| Title |
|---|
| "EDTA低温复合清洗新工艺的研究及应用";张振达等;《中国电力》;20051031;第38卷(第10期);102-104 * |
| 张振达等."EDTA低温复合清洗新工艺的研究及应用".《中国电力》.2005,第38卷(第10期),102-104. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102367576A (en) | 2012-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102367576B (en) | EDTA (Ethylene Diamine Tetraacetic Acid) low-temperature cleaning aid and application thereof | |
| CN103409763B (en) | A kind of clean-out system composition and clean-out system and application thereof | |
| CN101864575B (en) | Special cleaning agent for stainless steel equipment and use method thereof | |
| CN102242028B (en) | Neutral detergent and application of neutral detergent in cleaning hard scale of gas-gas heater (GGH) | |
| CN102494328B (en) | Boiler cleaning process | |
| CN101892489B (en) | Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof | |
| CN101817598B (en) | Descaling cleaning fluid for thermal pipeline and preparation method thereof | |
| CN103525599A (en) | Boiler scale remover | |
| CN103374726A (en) | Efficient multipurpose metal cleaning agent | |
| CN106521519A (en) | Cleaning agent for oxide skin of overheater and cleaning method thereof | |
| CN107557794A (en) | Circular regeneration type ferrous sulfide deactivation, the deodorization of sulphur ammonia amine, the three-in-one cleaning agent of anti-austenitic stainless steel Polythionic acid stress corrosion | |
| CN102425778B (en) | Process of carrying out low-temperature chemical cleaning passivation on thermal power plant boiler by utilizing EDTA (Ethylene Diamine Tetraacetic Acid) | |
| CN1297640C (en) | Three-in-one cleaning agent | |
| CN109607835A (en) | Waste heat boiler of converter efficiently shells dirty scale remover online | |
| CN101899667A (en) | Special cleaning agent for aluminium equipment | |
| CN101591010A (en) | The purging method of phosphoric acid concentrating device by using forced circulation vacuum evaporation method | |
| CN201916889U (en) | supercritical low temperature EDTA (Ethylene Diamine Tetraacetic Acid) cleaning system for tower-type boiler in heat power plant | |
| CN101245456A (en) | Prefilming technique for condensator brass pipe of electric power plant with green copperas | |
| CN104129862A (en) | Cleaning agent for removing boiler silicon scale | |
| CN102002721A (en) | Cleaning agent for cleaning gas/gas heat exchanger of wet desulphurization system and preparing and using method thereof | |
| CN101851028A (en) | Preparation of scale removing and preventing agent for ash-removing water system | |
| CN111171965A (en) | Multifunctional composite cleaning solution for operation cleaning | |
| CN105112929B (en) | Station boiler is hot quickly washes silicon prefilming agent | |
| CN108680054A (en) | A kind of pre- heat exchanger cleaning method of movable type VACOM and device | |
| CN104233338A (en) | Neutral deoiling rust remover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20121105 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20121105 Address after: 730000 Anning District, Gansu City, Lanzhou Province Applicant after: Lanzhou Longneng Electic Power Science & Technology Co.,Ltd. Applicant after: State Grid Corporation of China Address before: 730000 Anning District, Gansu City, Lanzhou Province Applicant before: Lanzhou Longneng Electic Power Science & Technology Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |