CN112853364A - Condenser manganese scale chemical cleaning agent - Google Patents

Condenser manganese scale chemical cleaning agent Download PDF

Info

Publication number
CN112853364A
CN112853364A CN202110051289.XA CN202110051289A CN112853364A CN 112853364 A CN112853364 A CN 112853364A CN 202110051289 A CN202110051289 A CN 202110051289A CN 112853364 A CN112853364 A CN 112853364A
Authority
CN
China
Prior art keywords
cleaning agent
manganese
corrosion
cleaning
condenser
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.)
Granted
Application number
CN202110051289.XA
Other languages
Chinese (zh)
Other versions
CN112853364B (en
Inventor
文慧峰
龙国军
姚建涛
位承君
张贵泉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Thermal Power Research Institute Co Ltd
Original Assignee
Xian Thermal Power Research Institute Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xian Thermal Power Research Institute Co Ltd filed Critical Xian Thermal Power Research Institute Co Ltd
Priority to CN202110051289.XA priority Critical patent/CN112853364B/en
Publication of CN112853364A publication Critical patent/CN112853364A/en
Application granted granted Critical
Publication of CN112853364B publication Critical patent/CN112853364B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/088—Iron or steel solutions containing organic acids
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
    • C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

The invention discloses a condenser manganese scale chemical cleaning agent, which consists of 3.0-20% of cleaning agent, 0.1-1.0% of catalyst, 0.3-1.0% of corrosion inhibitor, 0.1-1.0% of penetrating agent and industrial water in percentage by mass, and the cleaning temperature is controlled. The cleaning agent is used as a key component for removing manganese scale, the catalyst reduces the activation performance of the manganese scale, and the corresponding cleaning agent can react to achieve the cleaning effect, the scale is cleaned by the cleaning agent, the corrosion inhibitor is used for controlling the corrosion of a metal matrix, and the penetrating agent is used for promoting a cleaning medium to enter the manganese scale. The chemical cleaning process condition is to control the cleaning temperature to be 25-45 ℃. The cleaning agent has good solubility on manganese scale products of the condenser, can control the corrosion of a metal matrix within a design acceptable range and a design safe range, and completely inhibits the local corrosion of the metal matrix such as pitting corrosion, intergranular corrosion, stress corrosion, galvanic corrosion and the like.

Description

Condenser manganese scale chemical cleaning agent
Technical Field
The invention belongs to the technical field of chemical cleaning in the power industry, and particularly relates to a chemical cleaning agent for manganese scales of a condenser.
Background
The condenser is one of main heat exchangers in the power industry, and the condenser can cause scaling of different degrees due to different circulating water qualities in the operation process and concentration multiplying power along with the extension of the operation time.
The chemical cleaning is used as a cleaning method for systems such as conventional electric condensers and boilers, has the advantages of mature process, easy operation, good cleaning effect and the like, and is a preferred method for condenser scaling. However, river water is adopted as circulating water of the condenser in part of regions, and the river water contains manganese ions, so that the main component of condenser scaling is manganese scale, and the requirement on the scale dissolving capacity of a cleaning medium is stronger; secondly, local corrosion such as metal material pitting corrosion, austenitic steel intergranular corrosion, stress corrosion, seal surface galvanic corrosion and the like occurs in the cleaning process. Therefore, higher demands are made on the cleaning medium and corrosion control.
Disclosure of Invention
The invention aims to provide a condenser manganese scale chemical cleaning agent which has good solubility on condenser manganese scale, can control the corrosion of a metal matrix within a design acceptable range and a design safe range, and completely inhibits the occurrence of local corrosion of the metal matrix such as pitting corrosion, intergranular corrosion, stress corrosion, galvanic corrosion and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a condenser manganese scale chemical cleaning agent and a cleaning method are characterized in that: the cleaning agent is composed of 3.0-20% of cleaning agent, 0.1-1.0% of catalyst, 0.3-1.0% of corrosion inhibitor, 0.1-1.0% of penetrating agent and industrial water by mass percentage, and the cleaning temperature is controlled;
the cleaning agent is used as a key component for removing manganese scale and is formed by mixing 50-70% of sulfamic acid, 5-30% of citric acid, 5-30% of diethyl triaminepentaacetic acid and 5-20% of ethylenediamine tetraacetic acid according to mass percentage;
the catalyst is used for reducing the activation performance of manganese scales in the scale products and promoting an acidic medium to enter the interior of the scale products, and comprises one or more of acetaldehyde, sodium ascorbate, aniline, tyrosine, stannous chloride and ethanol.
The corrosion inhibitor is used for controlling corrosion of a metal matrix of a heat exchange tube of a condenser and is composed of one or more than one of dimercapto benzothiazole, high-carbon alcohols, methylbenzotriazole, hydroxy ethylidene diphosphonic acid, polyacrylic acid, hexamethylene tetramine, ethylene glycol monobutyl ether and sodium dodecyl benzene sulfonate compounds.
The penetrating agent is used for reducing the surface tension of a corrosion product and an oxide skin and promoting a cleaning solution to enter the interior of a manganese scale, and consists of one or more of fatty alcohol-polyoxyethylene ether, triethanolamine, trisodium phosphate, oleic soap, monoethanolamine, sodium bicarbonate, citric acid and nekal BX.
And the chemical cleaning temperature is controlled to be 25-45 ℃.
The technical scheme provided by the invention has the following beneficial effects:
1. the invention provides a chemical cleaning agent for manganese scale of a condenser, which has good solubility for the manganese scale of the condenser; under the cleaning condition, the paint has no point corrosion to carbon steel, ferrite steel and austenitic stainless steel, and has no intergranular corrosion and stress corrosion to the austenitic stainless steel loaded with ultimate stress; under the cleaning condition, the corrosion rate of all metals is controlled within a design acceptable range and a safety range, and the requirements of relevant power industry standards are met.
2. The invention relates to a condenser manganese scale chemical cleaning agent, which is characterized in that the activating performance of manganese scales is reduced by adding a catalyst, a cleaning medium is promoted to enter the inside of a scale product, and the mass percent of the cleaning agent can be reduced by adding the catalyst.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1:
the cleaning agent consists of 5.0 percent of cleaning agent, 0.2 percent of sodium ascorbate catalyst, 0.3 percent of dimercapto benzothiazole corrosion inhibitor, 0.2 percent of fatty alcohol polyoxyethylene ether penetrating agent and industrial water according to mass percentage.
The cleaning agent comprises the following substances in percentage by mass: 50% of sulfamic acid, 30% of citric acid, 8% of diethyltriaminepentaacetic acid and 12% of ethylenediamine tetraacetic acid.
Taking 300mL of the cleaning agent of the embodiment, heating to 35 ℃, cleaning a sample of a standby product pipe with manganese scales of a TP316 condenser pipe under a closed condition for 24 hours, and after the cleaning is finished, the scale removal rate of the manganese scales of the TP316 pipe is 99.2%.
Example 2:
the corrosion inhibitor consists of 10 percent of cleaning agent, 0.3 percent of tyrosine catalyst, 0.3 percent of methylbenzotriazole compound corrosion inhibitor, 0.2 percent of triethanolamine and industrial water according to mass percentage.
The cleaning agent comprises the following substances in percentage by mass: 60% of sulfamic acid, 20% of citric acid, 10% of diethyltriaminepentaacetic acid and 10% of ethylenediamine tetraacetic acid.
Taking 300mL of the cleaning agent of the embodiment, heating to 40 ℃, cleaning a sample of a standby product pipe with manganese scales of a TP316 condenser pipe under a closed condition for 24 hours, and after the cleaning is finished, the scale removal rate of the manganese scales of the TP316 pipe is 98.8%. No. 20 steel and TP316 corrosion indicator chip have no pitting corrosion, and the corrosion rates are respectively 0.19 g/(m)2·h)、0.038g/(m2H), the TP316 corrosion indicator piece and the loaded stress sample can not observe the intercrystalline corrosion and the stress corrosion under a metallographic microscope with the magnification of 500 times.
Example 3:
the cleaning agent consists of 20 percent of cleaning agent, 0.2 percent of stannous chloride catalyst, 1.0 percent of hydroxyethylidene diphosphonic acid corrosion inhibitor, 0.5 percent of monoethanolamine penetrant and industrial water according to mass percentage.
The cleaning agent comprises the following substances in percentage by mass: 70% of sulfamic acid, 10% of citric acid, 10% of diethyltriaminepentaacetic acid and 10% of ethylenediaminetetraacetic acid.
Taking 300mL of the cleaning agent of the embodiment, heating to 45 ℃, cleaning a sample of a standby product pipe with manganese scales of a TP316 condenser pipe under a closed condition for 24 hours, and after the cleaning is finished, the scale removal rate of the manganese scales of the TP316 pipe is 98.6%. 20 steel and TP316 corrosionThe indicating sheet has no pitting corrosion, and the corrosion rates are respectively 0.56 g/(m)2·h)、0.054g/(m2H), the TP316 corrosion indicator piece and the loaded stress sample can not observe the intercrystalline corrosion and the stress corrosion under a metallographic microscope with the magnification of 500 times.
Example 4:
the cleaning agent consists of 10 percent of cleaning agent, 0.3 percent of sodium ascorbate and aniline catalyst, 0.5 percent of hexamethylenetetramine and dimercapto phenyl propylthiazole corrosion inhibitor, 0.5 percent of triethanolamine and trisodium phosphate penetrant and industrial water according to mass percentage.
The cleaning agent comprises the following substances in percentage by mass: 55% of sulfamic acid, 15% of citric acid, 20% of diethyltriaminepentaacetic acid and 10% of ethylenediamine tetraacetic acid.
Taking 300mL of the cleaning agent of the embodiment, heating to 45 ℃, cleaning a sample of a standby product pipe with manganese scales of a TP316 condenser pipe under a closed condition for 24 hours, and after the cleaning is finished, the scale removal rate of the manganese scales of the TP316 pipe is 99.2%. No. 20 steel and TP316 corrosion indicator chip have no pitting corrosion, and the corrosion rates are respectively 0.27 g/(m)2·h)、0.024g/(m2H), the TP316 corrosion indicator piece and the loaded stress sample can not observe the intercrystalline corrosion and the stress corrosion under a metallographic microscope with the magnification of 500 times.
Example 5:
the cleaning agent consists of 8 percent of cleaning agent, 0.3 percent of tyrosine, stannous chloride and ethanol catalyst, 0.4 percent of methylbenzotriazole, hydroxyethylidene diphosphonic acid, polyacrylic acid, sodium dodecyl benzene sulfonate corrosion inhibitor, 0.3 percent of oleic acid soap, monoethanolamine, sodium bicarbonate, nekal BX penetrating agent and industrial water according to mass percentage.
The cleaning agent comprises the following substances in percentage by mass: 65% of sulfamic acid, 10% of citric acid, 10% of diethyltriaminepentaacetic acid and 15% of ethylenediaminetetraacetic acid.
Taking 300mL of the cleaning agent of the embodiment, heating to 45 ℃, cleaning a sample of a standby product pipe with manganese scales of a TP316 condenser pipe under a closed condition for 24 hours, and after the cleaning is finished, the scale removal rate of the manganese scales of the TP316 pipe is 99.8%. No. 20 steel and TP316 corrosion indicator chip have no pitting corrosion and the corrosion rate is divided intoRespectively 0.27 g/(m)2·h)、0.024g/(m2H), the TP316 corrosion indicator piece and the loaded stress sample can not observe the intercrystalline corrosion and the stress corrosion under a metallographic microscope with the magnification of 500 times.

Claims (4)

1. The chemical cleaning agent for the manganese scale of the condenser is characterized in that: the cleaning agent is composed of 3.0-20% of cleaning agent, 0.1-1.0% of catalyst, 0.3-1.0% of corrosion inhibitor, 0.1-1.0% of penetrating agent and industrial water by mass percentage, and the cleaning temperature is controlled;
the cleaning agent is used as a key component for removing manganese scale of the condenser and is formed by mixing 50-70% of sulfamic acid, 5-30% of citric acid, 5-30% of diethyl triaminepentaacetic acid and 5-20% of ethylenediamine tetraacetic acid according to the mass percentage;
the catalyst reduces the activation performance of manganese scales, promotes a cleaning medium to enter the interior of a scale product, and consists of one or more of acetaldehyde, sodium ascorbate, aniline, tyrosine, stannous chloride and ethanol, and the mass percentage of the cleaning agent can be reduced by adding the catalyst;
the catalytic principle is as follows:
Mn4++ catalyst → Mn2++H2O。
2. The chemical cleaning agent for the manganese scales of the condenser according to claim 1, which is characterized in that: the corrosion inhibitor is used for controlling corrosion of a metal matrix of a heat exchange tube of a condenser and is composed of one or more than one of dimercapto benzothiazole, high-carbon alcohols, methylbenzotriazole, hydroxy ethylidene diphosphonic acid, polyacrylic acid, hexamethylene tetramine, ethylene glycol monobutyl ether and sodium dodecyl benzene sulfonate compounds.
3. The chemical cleaning agent for the manganese scales of the condenser according to claim 1, which is characterized in that: the penetrating agent is used for reducing the tension of manganese scales and metal surfaces and promoting cleaning liquid to enter the manganese scales, and consists of one or more of fatty alcohol-polyoxyethylene ether, triethanolamine, trisodium phosphate, oleic soap, monoethanolamine, sodium bicarbonate, citric acid and nekal BX.
4. The chemical cleaning agent for the manganese scales of the condenser according to claim 1, which is characterized in that: and controlling the cleaning temperature to be 25-45 ℃.
CN202110051289.XA 2021-01-14 2021-01-14 Condenser manganese scale chemical cleaning agent Active CN112853364B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110051289.XA CN112853364B (en) 2021-01-14 2021-01-14 Condenser manganese scale chemical cleaning agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110051289.XA CN112853364B (en) 2021-01-14 2021-01-14 Condenser manganese scale chemical cleaning agent

Publications (2)

Publication Number Publication Date
CN112853364A true CN112853364A (en) 2021-05-28
CN112853364B CN112853364B (en) 2022-08-26

Family

ID=76006365

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110051289.XA Active CN112853364B (en) 2021-01-14 2021-01-14 Condenser manganese scale chemical cleaning agent

Country Status (1)

Country Link
CN (1) CN112853364B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113716708A (en) * 2021-09-13 2021-11-30 大连理工大学 Descaling agent for inner wall of titanium tube of condenser
CN113755848A (en) * 2021-09-18 2021-12-07 西安热工研究院有限公司 Chemical cleaning agent for insoluble scale of heat supply network heater and cleaning method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0183894A2 (en) * 1984-11-30 1986-06-11 Feldmann-Chemie GmbH Use of mixture of acids and/or acid salts for removing iron and manganese deposits and stains
CA2466084A1 (en) * 1997-12-22 1999-07-01 Wayne M. Rees Cleaning compositions for ceramic and porcelain surfaces and related methods
CN101768529A (en) * 2010-01-25 2010-07-07 蓝星环境工程有限公司 Broad-spectrum and efficient cleaning agent for cooling system
WO2012032319A1 (en) * 2010-09-08 2012-03-15 Reckitt Benckiser Llc Lavatory brush block and methods for use
CN102719834A (en) * 2012-06-04 2012-10-10 西安热工研究院有限公司 Chemical cleaning agent for superheater heat exchange pipe of station boiler
WO2019221091A1 (en) * 2018-05-17 2019-11-21 株式会社Adeka Scale cleaning agent and method for removing scale using said agent

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0183894A2 (en) * 1984-11-30 1986-06-11 Feldmann-Chemie GmbH Use of mixture of acids and/or acid salts for removing iron and manganese deposits and stains
CA2466084A1 (en) * 1997-12-22 1999-07-01 Wayne M. Rees Cleaning compositions for ceramic and porcelain surfaces and related methods
CN101768529A (en) * 2010-01-25 2010-07-07 蓝星环境工程有限公司 Broad-spectrum and efficient cleaning agent for cooling system
WO2012032319A1 (en) * 2010-09-08 2012-03-15 Reckitt Benckiser Llc Lavatory brush block and methods for use
CN102719834A (en) * 2012-06-04 2012-10-10 西安热工研究院有限公司 Chemical cleaning agent for superheater heat exchange pipe of station boiler
WO2019221091A1 (en) * 2018-05-17 2019-11-21 株式会社Adeka Scale cleaning agent and method for removing scale using said agent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113716708A (en) * 2021-09-13 2021-11-30 大连理工大学 Descaling agent for inner wall of titanium tube of condenser
CN113755848A (en) * 2021-09-18 2021-12-07 西安热工研究院有限公司 Chemical cleaning agent for insoluble scale of heat supply network heater and cleaning method

Also Published As

Publication number Publication date
CN112853364B (en) 2022-08-26

Similar Documents

Publication Publication Date Title
CN101864575B (en) Special cleaning agent for stainless steel equipment and use method thereof
CN112853364B (en) Condenser manganese scale chemical cleaning agent
CN111322904B (en) Optimization method for heat exchanger pickling process
CN112779543A (en) Organic acid cleaning agent and preparation method thereof
US20050126587A1 (en) Method of cleaning a steam generator of a pressurized water reactor
CN111663142A (en) Cleaning agent for removing rust scale in plate heat exchanger and preparation method thereof
CN111441058A (en) Descaling rust-removing corrosion-inhibition prefilming agent and preparation method and application thereof
JP2000263088A (en) Method for washing circulating water system
CN105369266A (en) Steel acid washing liquid based on Fenton oxidation reaction and acid washing process
US4721532A (en) Removal of iron fouling in cooling water systems
CN101899667A (en) Special cleaning agent for aluminium equipment
US4861386A (en) Enhanced cleaning procedure for copper alloy equipment
CN111171965B (en) Multifunctional composite cleaning solution for operation cleaning
EP2455514A1 (en) Method for treating iron-based metal surface which is exposed to superheated steam
CN112144066B (en) Chemical cleaning agent and cleaning method for secondary loop steam system of high-temperature gas cooled reactor nuclear power unit
CN113862684B (en) Chemical cleaning agent and cleaning method for martensitic stainless steel T91 material superheater oxide skin
CN115537817A (en) Environment-friendly water-based antirust agent and preparation method and application thereof
CN113755848B (en) Chemical cleaning agent for insoluble scale of heat supply network heater and cleaning method
Tahir et al. Experimental study of chemical de-scaling-I: Effect of acid concentration
JPH05255874A (en) Pickling promoter, pickling solution composition containing the same promoter and method for promoting metal pickling using the same composition
CN103834956A (en) Cleaning agent household heating system consisting of various metal materials and preparation method for cleaning agent
CN113716708A (en) Descaling agent for inner wall of titanium tube of condenser
CN100460565C (en) Pickling inhibitor and preparation method thereof
CN112301351A (en) Pickling and passivating process for austenitic stainless steel part
KR101321054B1 (en) One pot chemical cleaning agent and chemical cleaning method using the same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant