CN101892489A - Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof - Google Patents
Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof Download PDFInfo
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- CN101892489A CN101892489A CN 201010237072 CN201010237072A CN101892489A CN 101892489 A CN101892489 A CN 101892489A CN 201010237072 CN201010237072 CN 201010237072 CN 201010237072 A CN201010237072 A CN 201010237072A CN 101892489 A CN101892489 A CN 101892489A
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- acid
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- heat exchanger
- flue dust
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- 239000012459 cleaning agent Substances 0.000 title claims abstract description 27
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 24
- 230000023556 desulfurization Effects 0.000 title claims abstract description 24
- 239000003500 flue dust Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 60
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 58
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003112 inhibitor Substances 0.000 claims abstract description 18
- 238000005554 pickling Methods 0.000 claims abstract description 17
- BDAGIHXWWSANSR-UHFFFAOYSA-N Formic acid Chemical compound OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims abstract description 14
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 13
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 11
- KHSLHYAUZSPBIU-UHFFFAOYSA-M benzododecinium bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 KHSLHYAUZSPBIU-UHFFFAOYSA-M 0.000 claims abstract description 10
- 230000007797 corrosion Effects 0.000 claims abstract description 9
- 238000005260 corrosion Methods 0.000 claims abstract description 9
- 235000019253 formic acid Nutrition 0.000 claims abstract description 7
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 6
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims description 21
- 239000000654 additive Substances 0.000 claims description 21
- 230000000996 additive effect Effects 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 16
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 5
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 5
- 238000005660 chlorination reaction Methods 0.000 claims description 4
- OGQYPPBGSLZBEG-UHFFFAOYSA-N dimethyl(dioctadecyl)azanium Chemical compound CCCCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCCCC OGQYPPBGSLZBEG-UHFFFAOYSA-N 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000000837 restrainer Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 210000003298 dental enamel Anatomy 0.000 abstract description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 3
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 abstract 1
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 abstract 1
- REZZEXDLIUJMMS-UHFFFAOYSA-M dimethyldioctadecylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCCCC REZZEXDLIUJMMS-UHFFFAOYSA-M 0.000 abstract 1
- 239000004664 distearyldimethylammonium chloride (DHTDMAC) Substances 0.000 abstract 1
- 229960001484 edetic acid Drugs 0.000 abstract 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 32
- 238000000034 method Methods 0.000 description 13
- 239000000126 substance Substances 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002000 scavenging effect Effects 0.000 description 3
- 239000012467 final product Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
Abstract
The invention discloses a cleaning agent for flue dust scale on the surface of a gas heat exchanger of a gas desulfurization system and a preparation method thereof. The cleaning agent is characterized by comprising the following components in percentage by mass: 5 to 25 percent of main cleaning agent, 3 to 15 percent of auxiliary cleaning agent, 2 to 10 percent of release agent, 2 to 8 percent of corrosion inhibitor, and the balance water, wherein the main cleaning agent is one or two of nitric acid, hydrochloric acid and sulfuric acid; the auxiliary cleaning agent is more than one of methanoic acid, acetic acid, ethylene diamine tetraacetic acid, sulfamic acid, glycollic acid, oxalic acid and hydroxyethylidene diphosphonic acid; the release agent is one of dodecyl dimethyl benzyl ammonium bromide, dodecyl dimethyl benzyl ammonium chloride and distearyl dimethyl ammonium chloride; and the corrosion inhibitor is pickling inhibitor. The cleaning agent can realize online cleaning at normal temperature, complete scale removal, short cleaning time, lower cleaning cost and no corrosion to enamel on the surface of a heat exchange element.
Description
Technical field
The present invention relates to a kind of clean-out system, particularly a kind of clean-out system that is used for cleaning the gas-gas heat exchanger surface flue dust incrustation that the coal-fired unit desulfurization method of limestone-gypsum of large-scale power system is provided with.
Background technology
Coal fired power generation remains one of main mode of China's electrical production at present, the coal-fired unit of present Chinese large-sized electric power, desulfurization method of limestone-gypsum system more than 90% all is provided with gas-gas heat exchanger (being called for short GGH), GGH is the expensive equipment of the height except that the absorption tower, and can whether its state normally is related to flue gas desulphurization system steady running.In the desulphurization system that has put into operation, through use after a while, will occur that the GGH severe deposits is stopped up, heat exchange efficiency is poor, pressure reduction is far above problems such as design loads, the desulphurization system of having to stop transport is carried out cleaning.And along with the raising that country requires the environmental protection generating, the operational percentage examination of desulphurization system requires more and more stricter, and GGH cleaning and descaling timely and effectively is just necessary.Existing GGH cleans incrustation and generally takes two kinds of methods:
One, hyperpressure water washing out method
Adopt present high pressure water cleaning technique, after closing down GGH, wash incrustation with the hyperpressure water more than the 50MPa with manual type.
Two, " two-step approach " chemical cleaning method
This method is during the sweetener overhaul, all pulls down the GGH heat exchange element, adopts " two-step approach " of conventional needle to the indissoluble dirt, the chemical cleaning method of pickling after the promptly first soda boiling.
In above-mentioned two kinds of methods, ultra-high voltage waterpower washing out method exists: 1) may damage GGH heat exchange element surface enamel; 2) there is potential safety hazard in operator; 3) can not remove GGH incrustation completely; 4) reduce shortcomings such as differential pressure is limited in one's ability.And " two-step approach " is though chemical cleaning method cleans relatively more thorough but existence: 1) scavenging period is long, generally needs about 20 days; 2) maintenance workload is big, and all GGH heat exchange elements need artificial dismounting; 3) technology is loaded down with trivial details, and soda boiling needs steam heating; 4) the high shortcoming of cleaning charge.As seen, existing purging method can not satisfy the needs of the timely and effective cleaning of GGH surface flue dust incrustation.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, a kind of dismounting GGH heat exchange element that do not need is provided, GGH surface flue dust incrustation clean-out system easy to use, that the cleaning required time is short and effective and preparation method thereof.
For reaching above-mentioned purpose, the present invention adopts following technical scheme: a kind of cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system, it is characterized in that, it is made by cleaning host, cleaning additive, stripper, inhibiter reaction, described set of dispense specific mass percentage composition is: cleaning host 5～25%, cleaning additive 3～15%, stripper 2～10%, inhibiter 2～8%, surplus are water; Described cleaning host is meant one or both in nitric acid, hydrochloric acid and the sulfuric acid; Cleaning additive is meant more than one in formic acid, acetate, ethylenediamine tetraacetic acid (EDTA), thionamic acid, oxyacetic acid, oxalic acid and the 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid; Stripper is meant a kind of in dodecyl dimethyl benzyl ammonium bromide, dodecyl dimethyl benzyl ammonium chloride and the chlorination dimethyl dioctadecyl ammonium; Inhibiter is meant restrainer.
Described restrainer is meant multifunctional acid pickling inhibitor or hydrochloric acid pickling corrosion inhibitor.
The preparation method of above-mentioned cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system is characterized in that, comprises the steps:
The first step, will clean host, cleaning additive, stripper, inhibiter and water and dispose by following mass percent: cleaning host 5～25%, cleaning additive 3～15%, stripper 2～10%, inhibiter 2～8%, surplus is a water;
In second step, the raw material that the first step is configured stirs at normal temperatures and pressures, promptly gets cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system.
Clean-out system of the present invention uses mineral acid as cleaning host, uses organic acid as a supplement, and the control of stripper concentration is very important, and the three ties in, and can soften, clean the indissoluble incrustation of removing on the GGH very effectively; Use inhibiter, the equipment of heat exchanging element and cleaning system plays a protective role, and guarantees that erosion rate meets the chemical cleaning technique requirement.
Clean-out system of the present invention is work like this: clean-out system of the present invention is injected spray equipment, and circulated sprinkling gets final product to GGH heat exchange element surface, and about 8 hours of single scavenging period adopts the flushing of 10MPa pressure water to get final product at last.
Clean-out system of the present invention possesses following outstanding advantage and effect with respect to prior art:
1, adopt clean-out system of the present invention, after just can being implemented in desulfurization GGH and stopping transport, on-line cleaning under the normal temperature need not to dismantle the GGH heat exchange element, and cleaning and descaling is thorough, and scavenging period is short, generally only needs about 4 days, and cleaning charge is lower;
2, adopt clean-out system of the present invention, cleaning is simple, need not heating, need not soda boiling, and GGH heat exchange element surface enamel is not had corrosion;
3, the starting material of preparation clean-out system employing of the present invention are industrial chemicals commonly used, and preparation technology is simple, and production cost is low, and is effective.
Embodiment
The present invention is described in further detail below in conjunction with embodiment, but embodiments of the present invention are not limited thereto.
Embodiment one
The first step, by following quality percentage composition component configuration raw material:
Cleaning host 5%, employing mass percent concentration are 68% nitric acid;
Cleaning additive 3%, adopting mass percent concentration is 90% formic acid;
Stripper 2% adopts dodecyl dimethyl benzyl ammonium bromide;
Inhibiter 2%, the multifunctional acid pickling inhibitor (Lan826) that adopts sky, Lanzhou China chemical research institute to produce;
Surplus is a water;
In second step, the raw material that the first step is disposed stirs at normal temperatures and pressures, promptly gets cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system.
Embodiment two
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 15%, employing mass percent concentration are 31% hydrochloric acid;
Cleaning additive 10%, employing mass percent concentration are 99% acetate;
Stripper 8% adopts dodecyl dimethyl benzyl ammonium chloride;
Inhibiter 5%, the multifunctional acid pickling inhibitor (IS139) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
Embodiment three
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 25%, employing mass percent concentration are 98% sulfuric acid;
Cleaning additive 15%, employing mass percent concentration are 99% ethylenediamine tetraacetic acid (EDTA);
Stripper 10% adopts the chlorination dimethyl dioctadecyl ammonium;
Inhibiter 8%, the hydrochloric acid pickling corrosion inhibitor (IS129) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
Embodiment four
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 10%, the sulfuric acid and the mixed in hydrochloric acid of quality such as employing, sulfuric acid employing mass percent concentration is 98% sulfuric acid, hydrochloric acid employing mass percent concentration is 31% hydrochloric acid;
Cleaning additive 8%, employing mass percent concentration are 99.5% thionamic acid;
Stripper 5% adopts the chlorination dimethyl dioctadecyl ammonium;
Inhibiter 6%, the hydrochloric acid pickling corrosion inhibitor (IS129) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
Embodiment five
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 20%, the sulfuric acid of quality such as employing and nitric acid mix, and sulfuric acid employing mass percent concentration is 98% sulfuric acid, and nitric acid employing mass percent concentration is 68% nitric acid;
Cleaning additive 5%, employing mass percent concentration are 70% oxyacetic acid;
Stripper 4% adopts dodecyl dimethyl benzyl ammonium chloride;
Inhibiter 3%, the hydrochloric acid pickling corrosion inhibitor (IS129) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
Embodiment six
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 18%, the hydrochloric acid of quality such as employing and nitric acid mix, and hydrochloric acid employing mass percent concentration is 31% sulfuric acid, and nitric acid employing mass percent concentration is 68% nitric acid;
Cleaning additive 10%, employing mass percent concentration are 99.6% oxalic acid;
Stripper 5% adopts dodecyl dimethyl benzyl ammonium bromide;
Inhibiter 3%, the multifunctional acid pickling inhibitor (IS139) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
Embodiment seven
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 20%, employing mass ratio are that 1: 2 hydrochloric acid and nitric acid mixes, and hydrochloric acid employing mass percent concentration is 31% hydrochloric acid, and nitric acid employing mass percent concentration is 68% nitric acid;
Cleaning additive 12%, employing mass percent concentration are 50% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
Stripper 8% adopts dodecyl dimethyl benzyl ammonium bromide;
Inhibiter 7%, the multifunctional acid pickling inhibitor (IS139) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
Embodiment eight
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 20%, employing mass ratio are that 1: 2 hydrochloric acid and sulfuric acid mixes, and hydrochloric acid employing mass percent concentration is 31% hydrochloric acid, and sulfuric acid employing mass percent concentration is 98% sulfuric acid;
Cleaning additive 12%, adopting mass ratio is 1: 1: 1: 1: 1: 1: 1 formic acid, acetate, ethylenediamine tetraacetic acid (EDTA), thionamic acid, oxyacetic acid, oxalic acid and 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid were mixed mutually;
Stripper 8% adopts dodecyl dimethyl benzyl ammonium bromide;
Inhibiter 7%, the multifunctional acid pickling inhibitor (IS139) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
Embodiment nine
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 20%, employing mass ratio are that 1: 2 hydrochloric acid and sulfuric acid mixes, and hydrochloric acid employing mass percent concentration is 31% hydrochloric acid, and sulfuric acid employing mass percent concentration is 98% sulfuric acid;
Cleaning additive 12%, adopting mass ratio is that 1: 2: 1 formic acid, acetate, ethylenediamine tetraacetic acid (EDTA) mix mutually;
Stripper 8% adopts dodecyl dimethyl benzyl ammonium bromide;
Inhibiter 7%, the multifunctional acid pickling inhibitor (IS139) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
Embodiment ten
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 20%, employing mass ratio are that 1: 2 hydrochloric acid and sulfuric acid mixes, and hydrochloric acid employing mass percent concentration is 31% hydrochloric acid, and sulfuric acid employing mass percent concentration is 98% sulfuric acid;
Cleaning additive 12%, employing mass ratio are that 2: 1: 1 oxyacetic acid, oxalic acid and 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid mixed mutually;
Stripper 8% adopts dodecyl dimethyl benzyl ammonium bromide;
Inhibiter 7%, the multifunctional acid pickling inhibitor (IS139) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
Embodiment 11
Prepare cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system with reference to embodiment one step by following quality percentage composition set of dispense ratio:
Cleaning host 20%, employing mass ratio are that 1: 2 hydrochloric acid and sulfuric acid mixes, and hydrochloric acid employing mass percent concentration is 31% hydrochloric acid, and sulfuric acid employing mass percent concentration is 98% sulfuric acid;
Cleaning additive 12%, employing mass ratio are that 1: 3 formic acid mixes mutually with thionamic acid;
Stripper 8% adopts dodecyl dimethyl benzyl ammonium bromide;
Inhibiter 7%, the multifunctional acid pickling inhibitor (IS139) that adopts petrochemical complex studying and designing institute, Shaanxi to produce;
Surplus is a water.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (3)
1. cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system, it is characterized in that, it is made by cleaning host, cleaning additive, stripper, inhibiter reaction, described set of dispense specific mass percentage composition is: cleaning host 5～25%, cleaning additive 3～15%, stripper 2～10%, inhibiter 2～8%, surplus is a water; Described cleaning host is meant one or both in nitric acid, hydrochloric acid and the sulfuric acid; Cleaning additive is meant more than one in formic acid, acetate, ethylenediamine tetraacetic acid (EDTA), thionamic acid, oxyacetic acid, oxalic acid and the 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid; Stripper is meant a kind of in dodecyl dimethyl benzyl ammonium bromide, dodecyl dimethyl benzyl ammonium chloride and the chlorination dimethyl dioctadecyl ammonium; Inhibiter is meant restrainer.
2. cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system according to claim 1 is characterized in that described restrainer is meant multifunctional acid pickling inhibitor or hydrochloric acid pickling corrosion inhibitor.
3. the preparation method of claim 1 or 2 described cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system is characterized in that, comprises the steps:
The first step, will clean host, cleaning additive, stripper, inhibiter and water and dispose by following mass percent: cleaning host 5～25%, cleaning additive 3～15%, stripper 2～10%, inhibiter 2～8%, surplus is a water;
In second step, the raw material that the first step is configured stirs at normal temperatures and pressures, promptly gets cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system.
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| CN201010237072XA CN101892489B (en) | 2010-07-23 | 2010-07-23 | Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof |
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| CN103468420A (en) * | 2013-08-20 | 2013-12-25 | 李从波 | Weak acid cleaner and application thereof to removal of GGH (gas-gas heater) hard scale |
| CN104233329A (en) * | 2014-09-15 | 2014-12-24 | 河北省科学院能源研究所 | Chemical cleaning method of heat exchanger |
| CN105016629A (en) * | 2015-08-05 | 2015-11-04 | 福耀玻璃工业集团股份有限公司 | Pickling solution for washing silicate glass plate and method for washing silicate glass plate through pickling solution |
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