CN1152114A - Chemical cleaning process and special chemical for heating system - Google Patents
Chemical cleaning process and special chemical for heating system Download PDFInfo
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- CN1152114A CN1152114A CN 95120622 CN95120622A CN1152114A CN 1152114 A CN1152114 A CN 1152114A CN 95120622 CN95120622 CN 95120622 CN 95120622 A CN95120622 A CN 95120622A CN 1152114 A CN1152114 A CN 1152114A
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- China
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- pumping plant
- water
- rinse bath
- circulating pump
- heating system
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Abstract
The present invention is used in cleaning boiler and heating system. The cleaning process includes pressure test, eliminating carbon and carbide using special carbon scavenger, eliminating scale, rust and other residum using special corrosion inhibitor, inactivation and other steps. The present invention can prolong the service life of heating system and raise its heat efficiency.
Description
The present invention relates to a kind of cleaning and special agent, particularly a kind of chemical cleaning technology and special agent that is used for the boiler rinsing heating system.
The external general water treatment facilities of heating system that adopted are more advanced, and water technology reaches a standard, therefore external this class problem of Chemical cleaning that does not exist at present for heating system.And the present heating system of China mostly adopts boiler heating, this class boiler heating system just has casting carbon black, sand, silt etc. in the system before driving, these residues flow under the power of doing of pressure everywhere, there is very a spot of carbon black suspension to enter boiler, other bits all are deposited in the system, form the dead angle.In order to carry out water treatment, in system, add treating chemicals toward contact, various scale removers have caused a large amount of incrustation scales and accumulated slag to be sunken in the system again.In addition, the low-pressure boiler of China does not generally have the feedwater deaeration facility, and under such external condition, the oxygen corrosion in operating process of boiler and heating system is very serious, and the result of oxygen corrosion makes the metal surface activation, is Fe
3+, Fe
2+State, and Fe
3+, Fe
2+, Fe, OH
-Electrochemical corrosion between the ion is even more serious, and this also is the main reason that causes the shortening in service life of heating installation pipeline.Generally speaking, behind six to eight heating periods of heating system operation, the steam heating pipe inwall is the fouling of pitch black brown honey shape, the thick 3～5mm that reaches of dirt, and in this state, chemical attack is more serious, and part metals is stripped from, and is deposited on again and forms the dead angle in the system.If things go on like this, cause system to be corroded under dirt and more and more come seriously, the heating installation tube wall is more and more thinner, forms spot corrosion, pitting corrosion, perforation, and the system that directly causes scraps.
The purpose of this invention is to provide a kind of chemical cleaning technology and employed special agent of heating system, heating system is cleaned, in the hope of service life of prolonged boiler heating system and reach the purpose that improves the thermal efficiency and save coal consumption.
The object of the present invention is achieved like this.
A kind of heating system chemical cleaning technology, it includes the technology of following order: set up and clean pumping plant: set up pumping plant I at the boiler heating system delivery port, set up pumping plant II at the boiler heating system water inlet; Band is pressed test: in heating system, fill with water, and start and clean pumping plant I, water is beaten to pumping plant II, test each pump, valve after, circulated 15 minutes, and slowly be forced into 4kg/cm
3, pressurize is after 10 minutes, pressure testing water in the exhaust system; The cleaning of carbon black and carbide: the water in the rinse bath of pumping plant I is heated to 80 ℃, slowly adding special-purpose decarbonizer goes in the rinse bath of pumping plant I, start circulating pump B with the cleaning fluid injected system, positive and negative circulation 5 minutes, and soaked 20 minutes, the content of an eluate of per 25 minutes sample analysis, the content that is circulated to carbon black in the eluate, carbide are discharged the cleaning fluid of carbide, carbon black to trench by valve 2 till more than 80% then; Should guarantee to be full of in the system liquid in the cleaning process, water flushing trench is 10 minutes again; Clean incrustation scale, rust, silt etc.: in the rinse bath of pumping plant I, fill with running water, and with steam or electrical heating to 50 ℃, add 3.5 ‰ special corrosion agent in groove, and mix, start circulating pump B, injected system, liquid level should arrive exhaust outlet 3 places, and make in the rinse bath of pumping plant II 1/5th liquid level is arranged, stop the circulating pump B of pumping plant I; To contain 5～8% hydrochloric acid cleaning fluid injected system with scavenging pump C, and start scavenging pump C, treat till the exhaust outlet 3 no gases discharges in the system; In the rinse bath of pumping plant I, add 4-6% sulfuric acid, 1 ‰ fluosilicic acid, 2 ‰ sodium fluorides, polyester surfactant 6 ‰, the scavenging pump that starts pumping plant I is with the cleaning fluid injected system, and make in the rinse bath of pumping plant II 50% liquid level is arranged, stop the scavenging pump C of pumping plant I, start pumping plant II then, and with the circulating pump D of pumping plant II with the cleaning fluid forced circulation to pumping plant I, carry out repeatedly, content every concentration of lotion of analysis in 30 minutes and washings, until concentration of lotion, after the washings content constant, stop pumping plant I and pumping plant II, and cleaning fluid is discharged to trench (sewage disposal facility) after with right grey water treatment with valve 1 and valve 2; Water flushing: in the rinse bath of pumping plant l, pumping plant II, add entry, start pumping plant I.And constantly moisturizing, carrying out open flushing, the water in system reaches till the PH5-6, starts the circulating pump D of pumping plant II then, and backpurge system is till the pH value of water reaches 5-6; In the rinse bath of pumping plant I, add water, and be warmed to 40 ℃, slowly add passivating solution then, stir evenly, start circulating pump B.Make passivating solution riddle system, and make in the rinse bath of pumping plant II 1/3 liquid level is arranged, stop circulating pump B, start pumping plant II circulating pump D, circulate, so circulate three times, the time is 6 hours; Row's passivating solution: with the valve 1 at the row's trench place among pumping plant I, the pumping plant II and valve 2 passivating solution is entered trench, and system is resetted.Remove pumping plant I and pumping plant II.
The special corrosion agent of heating system chemical cleaning technology, it is by methenamine, sulphur hydracid sodium, aniline, first
Water is formulated.It is poly-to it is characterized in that it also includes polyaluminium sulfate, ammoniacal liquor, hydrazine hydrate and surfactant
The ratio of its contained various raw materials is: black Lopa Nationality tropine: 16%, sulphur hydracid sodium 11%, aniline 8%, first
7.5%, polyaluminium sulfate 4.5%, ammoniacal liquor 3%, hydrazine hydrate 2%, surfactant gather
6%.
The special-purpose decarbonizer of heating system cleaning, it includes NaOH, sodium carbonate, sodium metasilicate, surfactant amido alcohols and water, it is characterized in that it also includes potassium permanganate and ethanol; The ratio of its contained various compositions is: potassium permanganate 32%, NaOH 5%, sodium carbonate 7%, sodium metasilicate 6.5%, surfactant amido alcohols 6%, ethanol 9%, water 34%.
Accompanying drawing 1 is process flow diagram of the present invention.
Be embodiments of the invention with accompanying drawing 1 below, as a cleaning unit, carry out further specifying of cleaning and prescription simulation with 10,000 square metres of heating installation pipelines.
10,000 square metres of heating installation pipeline real system internal volume 18m
3The clean cycle amount should be 20% of volume, i.e. 3.6m
3Calculating total measurement (volume) is 21.6m
3, promptly about 22m
3
Press 22m
3Carry out the explanation of cleaning:
(1) pumping plant I and pumping plant II are installed, pumping plant I is installed in the boiler heating system delivery port, and pumping plant II then is installed in water inlet.
(2) carry out the water pressure test: pressure 4kg/cm
2, 40 minutes time, temperature: normal temperature.
(3) clean carbon black and carbide:
Water temperature requires to be heated to 80 ℃.The preparation decarbonizer gathers according to potassium permanganate 32%, NaOH 5%, sodium carbonate 7%, sodium metasilicate 6.5%, surfactant
6%, the proportioning of ethanol 9% is carried out the preparation of decarbonizer, contain in the ratio input rinse bath of decarbonizer 8% in each cube solution then, start circulating pump B then, and with the cleaning fluid injected system, positive and negative circulation 5 minutes, and soaked 20 minutes, the content of an eluate of per 25 minutes sample analysis, carbon black to the cleaning fluid, the content of carbide be 80% when above, by valve 1 cleaning fluid entered trench, and water flushing trench is l0 minute again.Attention should guarantee to be full of in the heating system liquid in cleaning process.
(4) fill with running water in the rinse bath of pumping plant I, and be heated to 50 ℃, add 3.5 ‰ special corrosion agent again in groove, the amount of input corrosion inhibiter is 22000 * 3.5 ‰, and prepares the special corrosion agent by this demand.Add concrete prescription with corrosion inhibiter with circulating pump B injected system, require liquid level should arrive exhaust outlet 3 places, and make in the rinse bath of pumping plant II 1/5th liquid level is arranged, at this moment stop the circulating pump B of pumping plant I.The hydrochloric acid of adding 5～8%, the cleaning fluid injected system that will contain hydrochloric acid with scavenging pump c, treat till the exhaust outlet 3 no gases discharges in the system, in the rinse bath of pumping plant I, add the fluosilicic acid, 2 ‰ sodium fluorides of 4～6% sulfuric acid, l ‰, 6 ‰ polyester surfactant, and with scavenging pump C with the cleaning fluid injected system, making in the pumping plant II rinse bath has 50% liquid level, stops the scavenging pump C of pumping plant I, starts pumping plant II then.And will clean forced circulation to pumping plant I with the circulating pump D of pumping plant II, carry out repeatedly, and concentration of lotion was once measured in per 30 minutes, after the content constant of washings.Stop circulation, after handling with limewash, discharge cleaning fluid to trench.
(5) water flushing: start pumping plant I, constantly moisturizing is carried out open flushing, and is recoiled.Make the pH value of the water of system reach 5～6.
(6) Passivation Treatment: under the situation of 40 ℃ of water temperatures, slowly add passivating solution, the prescription of passivating solution is: the natrium nitrosum of l%, 2% NaOH and 1.5% sodium carbonate, B fills with system with passivating solution with circulating pump, and makes in the rinse bath of pumping plant II 1/3rd liquid level is arranged, and stops circulating pump B, start pumping plant II, D circulates again with circulating pump, circulates three times, and the time is 6 hours.Discharge passivating solution then, system is resetted.
The concrete injected volume of various medicaments is as follows in the present embodiment:
Potassium permanganate 20000 * 8% * 32%=563.2kg
NaOH 22000 * 8% * 5%=88kg
Sodium carbonate 22000 * 8% * 7%=123.2kg
Sodium metasilicate 22000 * 8% * 6.5%=114.4kg
Surfactant 20000 * 8% * 6%=105.6kg is (poly-
Ethanol 20000 * 8% * 9%=158.4kg
Horse Lip river tropine 22000 * 4 ‰ * 16%=14.08kg
Sulphur hydracid sodium 22000 * 4 ‰ * 11%=9.68kg
Aniline 22000 * 4 ‰ * 8%=7.04kg
First
22000 * 4 ‰ * 7.5%=6.6kg
Polyaluminium sulfate 22000 * 4 ‰ * 4.5%=3.96kg
Ammoniacal liquor 22000 * 4 ‰ * 3%=2.64kg
Hydrazine hydrate 22000 * 4 ‰ * 2%=1.96kg
Surfactant 22000 * 4 ‰ * 6%=5.28kg (amido alcohols)
Hydrochloric acid 22000 * 8%=1960kg (100% ratio)
Sulfuric acid 22000 * 6%=1320kg (100% ratio)
Fluosilicic acid 22000 * 1 ‰=22kg (100% ratio)
Sodium fluoride 22000 * 2 ‰=44kg (100% ratio)
Special corrosion agent 22000 * 4 ‰=88kg
Surfactant 22000 * 6 ‰=132kg (polyester)
Natrium nitrosum 22000 * 1%=220kg
NaOH 22000 * 2%=440kg
Sodium carbonate 22000 * 1.5%=330kg
The present invention is the whole heating system of boiler rinsing thoroughly, can remove algae saprolite and other deposit in anhydrating, and the corrosivity of cleaning fluid is little.Utilize the present invention that boiler heating system is cleaned, can prolong the service life of whole system, improve the thermal efficiency of system.The present invention can be widely used in the various boiler heating systems.
Claims (3)
1. heating system chemical cleaning technology is characterized in that it includes the technology of following order:
A. set up and clean pumping plant: set up pumping plant (I) at the boiler heating system delivery port, set up pumping plant (II) at the boiler heating system water inlet;
B. band is pressed test: in heating system, fill with water, and start and clean pumping plant (I), water is beaten to pumping plant (II), test each pump, valve after, circulated 15 minutes, and slowly be forced into 4kg/cm
3, pressurize is after 10 minutes, pressure testing water in the exhaust system;
C. the cleaning of carbon black and carbide: the water in pumping plant (I) rinse bath is heated to 80 ℃, slowly adding special-purpose decarbonizer goes in the rinse bath of pump (I), start circulating pump (B) with the cleaning fluid injected system, positive and negative circulation 5 minutes, and soaked 20 minutes, the content of an eluate of per 25 minutes sample analysis, the content of the carbon black of wash cycles to the eluate, carbide is till more than 80%, and the cleaning fluid of discharging carbide, carbon black by valve (2) is to trench water flushing trench 10 minutes more then; Should guarantee the liquid that is full of in the system in the cleaning process;
D. clean incrustation scale, rust, silt etc.: in the rinse bath of pumping plant (I), fill with running water, and with steam or electrical heating to 50 ℃, add 3.5 ‰ special corrosion agent in groove, and mix, start circulating pump (B), injected system, liquid level should arrive exhaust outlet (3) and locate, and make in the rinse bath of pumping plant (II) 1/5th liquid level is arranged, stop the circulating pump (B) of pumping plant (I); To contain the hydrochloric acid cleaning fluid injected system of 5-8% with scavenging pump (C), and start scavenging pump (C), treat till the no gas discharge of exhaust outlet (3) in the system; Add 4-6% sulfuric acid, 1 ‰ fluosilicic acid, 2 ‰ sodium fluorides, polyester surfactant 6 ‰ in the rinse bath of pumping plant (I), the scavenging pump that starts pumping plant (I) is the cleaning fluid injected system, and makes in the rinse bath of pumping plant (II) 50% liquid level is arranged.Stop the scavenging pump (C) of pumping plant (I).Start pumping plant (II) then, and with the circulating pump (D) of pumping plant (II) with the cleaning fluid forced circulation to pumping plant (I), carry out repeatedly, content every concentration of lotion of analysis in 30 minutes and washings, after concentration of lotion, washings content constant, stop pumping plant (I) and pumping plant (II), and be discharged to trench after with valve (1) and valve (2) cleaning fluid being handled with limewash;
E. water flushing: the rinse bath at pumping plant (I), pumping plant (II) goes into to add entry, starts the circulating pump (B) of pumping plant (I).And constantly moisturizing, carrying out open flushing, the water in system reaches till the PH5-6, starts the circulating pump (D) of pumping plant (II) then, again backpurge system.Till the pH value of water reaches 5-6;
F. in the rinse bath of pumping plant (I), add water, and be warmed to 40 ℃.Slowly add passivating solution then, stir evenly, start circulating pump (B), make passivating solution riddle system, and make in the rinse bath of pumping plant (II) 1/3 liquid level is arranged, stop circulating pump (B) and start pumping plant (II) and circulate with circulating pump (D), so circulation is three times, and the time is 6 hours;
G. arrange passivating solution: with row's trench valve (1) in pumping plant (I), the pumping plant (II) and valve (2) passivating solution is entered trench, and system is resetted, remove pumping plant (I) and pumping plant (II).
2. special corrosion agent that is exclusively used in the described heating system chemical cleaning technology of claim l, it is by methenamine, sulphur hydracid sodium, aniline, first
Water is formulated, it is characterized in that it also includes poly-month fan of polyaluminium sulfate, ammoniacal liquor, hydrazine hydrate and surfactant, and the ratio of its contained various raw materials is: methenamine: 16%, sulphur hydracid sodium 11%, aniline 8%, first
7.5%, polyaluminium sulfate 45%, ammoniacal liquor 3%, hydrazine hydrate 2%, poly-month fan 6% of surfactant.
3. special-purpose decarbonizer that is exclusively used in the heating system chemical cleaning technology described in the claim 1, it includes NaOH, sodium carbonate, sodium metasilicate, surfactant amido alcohols and water, it is characterized in that it also includes potassium permanganate and ethanol; The ratio of its contained various compositions is: potassium permanganate 32%, NaOH 5%, sodium carbonate 7%, sodium metasilicate 6.5%, surfactant amido alcohols 6%, ethanol 9%, water 34%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95120622 CN1152114A (en) | 1995-12-15 | 1995-12-15 | Chemical cleaning process and special chemical for heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95120622 CN1152114A (en) | 1995-12-15 | 1995-12-15 | Chemical cleaning process and special chemical for heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1152114A true CN1152114A (en) | 1997-06-18 |
Family
ID=5082344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95120622 Pending CN1152114A (en) | 1995-12-15 | 1995-12-15 | Chemical cleaning process and special chemical for heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1152114A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865630A (en) * | 2010-06-08 | 2010-10-20 | 山东电力研究院 | Method and system for thermally washing pipeline |
| CN101608882B (en) * | 2009-07-22 | 2010-12-01 | 瓮福（集团）有限责任公司 | Method for cleaning copper tubes of condenser |
| CN103376026A (en) * | 2013-07-04 | 2013-10-30 | 天津大学 | Device for intelligently cleaning fouling of plate type heat exchanger in heat supply system |
| CN104293531A (en) * | 2014-08-27 | 2015-01-21 | 范国臣 | Scale remover used for cleaning hot-blast stove and boiler and accessories thereof, and cleaning method thereof |
| CN105973061A (en) * | 2016-07-04 | 2016-09-28 | 大唐淮北发电厂 | Descaling method of condenser of power plant |
| CN105983556A (en) * | 2015-02-25 | 2016-10-05 | 东莞新科技术研究开发有限公司 | Cleaning method for water temperature machine |
| CN106152867A (en) * | 2016-08-17 | 2016-11-23 | 云南冶金新立钛业有限公司 | The method and apparatus of carbon distribution in removing preheater tubes |
| CN109234025A (en) * | 2018-10-09 | 2019-01-18 | 岳阳宇翔科技有限公司 | Sour water tank deodorization cleaning formulation and its cleaning method |
-
1995
- 1995-12-15 CN CN 95120622 patent/CN1152114A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608882B (en) * | 2009-07-22 | 2010-12-01 | 瓮福（集团）有限责任公司 | Method for cleaning copper tubes of condenser |
| CN101865630A (en) * | 2010-06-08 | 2010-10-20 | 山东电力研究院 | Method and system for thermally washing pipeline |
| CN101865630B (en) * | 2010-06-08 | 2012-09-05 | 山东电力研究院 | Method and system for thermally washing pipeline |
| CN103376026A (en) * | 2013-07-04 | 2013-10-30 | 天津大学 | Device for intelligently cleaning fouling of plate type heat exchanger in heat supply system |
| CN104293531A (en) * | 2014-08-27 | 2015-01-21 | 范国臣 | Scale remover used for cleaning hot-blast stove and boiler and accessories thereof, and cleaning method thereof |
| CN105983556A (en) * | 2015-02-25 | 2016-10-05 | 东莞新科技术研究开发有限公司 | Cleaning method for water temperature machine |
| CN105973061A (en) * | 2016-07-04 | 2016-09-28 | 大唐淮北发电厂 | Descaling method of condenser of power plant |
| CN105973061B (en) * | 2016-07-04 | 2018-08-14 | 大唐淮北发电厂 | A kind of descaling method of condenser of power plant |
| CN106152867A (en) * | 2016-08-17 | 2016-11-23 | 云南冶金新立钛业有限公司 | The method and apparatus of carbon distribution in removing preheater tubes |
| CN109234025A (en) * | 2018-10-09 | 2019-01-18 | 岳阳宇翔科技有限公司 | Sour water tank deodorization cleaning formulation and its cleaning method |
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