CN106867697B - Water-based cleaning agent for cleaning petrochemical equipment - Google Patents
Water-based cleaning agent for cleaning petrochemical equipment Download PDFInfo
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- CN106867697B CN106867697B CN201710207193.1A CN201710207193A CN106867697B CN 106867697 B CN106867697 B CN 106867697B CN 201710207193 A CN201710207193 A CN 201710207193A CN 106867697 B CN106867697 B CN 106867697B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000012459 cleaning agent Substances 0.000 title claims abstract description 40
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 11
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 11
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 7
- 239000012964 benzotriazole Substances 0.000 claims description 7
- BSYVTEYKTMYBMK-UHFFFAOYSA-N tetrahydrofurfuryl alcohol Chemical compound OCC1CCCO1 BSYVTEYKTMYBMK-UHFFFAOYSA-N 0.000 claims description 7
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 claims description 7
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000004939 coking Methods 0.000 claims description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 238000004523 catalytic cracking Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006378 damage Effects 0.000 abstract description 5
- 150000002191 fatty alcohols Chemical class 0.000 abstract description 5
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 abstract description 3
- 239000002738 chelating agent Substances 0.000 abstract description 3
- 239000008139 complexing agent Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 150000002240 furans Chemical class 0.000 abstract description 3
- 239000003112 inhibitor Substances 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 3
- 230000003749 cleanliness Effects 0.000 abstract description 2
- 238000005202 decontamination Methods 0.000 abstract description 2
- 230000003588 decontaminative effect Effects 0.000 abstract description 2
- 231100000956 nontoxicity Toxicity 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000005194 fractionation Methods 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004886 process control Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- BSSNZUFKXJJCBG-UPHRSURJSA-N (z)-but-2-enediamide Chemical compound NC(=O)\C=C/C(N)=O BSSNZUFKXJJCBG-UPHRSURJSA-N 0.000 description 3
- LXAHHHIGZXPRKQ-UHFFFAOYSA-N 5-fluoro-2-methylpyridine Chemical compound CC1=CC=C(F)C=N1 LXAHHHIGZXPRKQ-UHFFFAOYSA-N 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 3
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 3
- JZCCFEFSEZPSOG-UHFFFAOYSA-L copper(II) sulfate pentahydrate Chemical compound O.O.O.O.O.[Cu+2].[O-]S([O-])(=O)=O JZCCFEFSEZPSOG-UHFFFAOYSA-L 0.000 description 3
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- BBNYLDSWVXSNOQ-UHFFFAOYSA-N oxolane-2-carbaldehyde Chemical compound O=CC1CCCO1 BBNYLDSWVXSNOQ-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000004303 calcium sorbate Substances 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000009775 high-speed stirring Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 231100000989 no adverse effect Toxicity 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XLGDDJIRIIXXHS-UHFFFAOYSA-N O1CCCC1.C(C1=CC=CO1)=O Chemical compound O1CCCC1.C(C1=CC=CO1)=O XLGDDJIRIIXXHS-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 environment Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
- C11D1/721—End blocked ethers
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/2096—Heterocyclic compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/28—Heterocyclic compounds containing nitrogen in the ring
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/30—Amines; Substituted amines ; Quaternized amines
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/33—Amino carboxylic acids
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Detergent Compositions (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a water-based cleaning agent for cleaning petrochemical equipment, which comprises the following components in percentage by mass: 10-13% of natural fatty alcohol and ethylene oxide polymer, 18-22% of furan derivative, 15-19% of chelating agent, 0.1-0.2% of complexing agent, 2-3% of antirust corrosion inhibitor and the balance of water to 100%. The water-based cleaning agent overcomes the defects of high corrosivity, low cleaning cleanliness, low safety performance and the like of the conventional water-based cleaning agent, and has the advantages of good cleaning effect, high decontamination cleaning capability, no damage to a cleaning workpiece, no corrosion, safety in use, no toxicity, no harm and the like.
Description
Technical Field
The invention relates to a water-based cleaning agent for cleaning petrochemical equipment, belonging to the technical field of petrochemical industry.
Background
In industrial petrochemical production, the oil refining production mainly adopts an atmospheric and vacuum distillation device and a subsequent device for deep processing, such as devices for ethylene cracking, catalytic cracking, delayed coking, aromatics combination, hydrorefining and the like. These devices, during the contact process of atmosphere, environment, raw materials for production, media, products, mechanical oil, etc., have physical, chemical, electrochemical or biological effects, and remain, deposit and generate various pollutants or coatings on the surface, which are harmful to the production operation, the product quality or the human health, and are industrial fouling. Thus, the problems of oil fouling and coke fouling are common in petrochemical production. The method comprises the phenomena of deposition of silt and dirt in a crude oil tank, adhesion of oil dirt on the wall of an oil pipeline, oil sludge, coking and coking of an oil way system of an air compressor and the like. The generation of oil dirt and coke dirt can increase the thermal conduction resistance of the pipe wall, the energy consumption of the equipment in the operation process is increased, the service life of the equipment is shortened, meanwhile, the inner diameter of a pipeline in the equipment is also reduced by the dirt layer, the flowing pressure drop of materials is increased, the yield is reduced, the operation period is shortened, the production is seriously influenced, and therefore, the cleaning and descaling must be carried out. The cleaning technology has important practical significance for ensuring safe, normal and efficient operation of petrochemical equipment.
At present, water-based cleaning agents, heavy oil cleaning agents, gas-phase cleaning agents and the like are commonly used for the oil stains. The main components of the water-based cleaning agent are a surfactant, an inorganic builder, and a small amount of solvent and water. The oil dirt is dispersed and emulsified or dissolved in the water solution by the principle that the active component of the cleaning agent is hydrophilic and oleophilic, so that the dirt is cleaned away from the surface of the workpiece.
The water-based cleaning agent has extremely strong cleaning permeability, can enter small gaps to complete cleaning, and is particularly suitable for cleaning high-density and precise products. The performance indicators for water-based cleaners are: active component content, pH value, density, cleaning power, hard water resistance, service life, foamability, compatibility, corrosiveness to metal materials and the like. In the prior art, the water-based cleaning agent has the defects of high corrosivity, low cleaning cleanliness, low safety performance and the like due to the components. Therefore, a water-based cleaning agent which is non-toxic, non-corrosive, safer and better in cleaning effect is urgently needed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a water-based cleaning agent, which uses water to replace hydrocarbon solvents, has no corrosion to equipment, and is cheaper, safer and more environment-friendly.
In order to achieve the purpose, the invention adopts the technical scheme that the water-based cleaning agent for cleaning petrochemical equipment comprises the following components in percentage by mass: 10-13% of natural fatty alcohol and ethylene oxide polymer, 18-22% of furan derivative, 15-19% of chelating agent, 0.1-0.2% of complexing agent, 2-3% of antirust corrosion inhibitor and the balance of water to 100%.
The natural fatty alcohol and ethylene oxide polymer is one or a mixture of fatty acid polyoxyethylene ether and fatty alcohol polyoxyethylene ether.
The furan derivative is one or a mixture of two of tetrahydro-2-furaldehyde and tetrahydro-furan-2-methanol.
The chelating agent is one or a mixture of more of monoethanolamine, diethanolamine and triethanolamine.
The complexing agent is one or a mixture of EDTA tetrasodium and EDTA disodium.
The rust-proof corrosion inhibitor is one or a mixture of rosin maleamide ethanol and benzotriazole.
Preferably, the water-based cleaning agent for cleaning petrochemical equipment comprises the following components in percentage by mass: 10-13% of fatty alcohol-polyoxyethylene ether, 18-22% of tetrahydrofuran-2-methanol, 15-19% of triethanolamine, 0.1-0.2% of EDTA tetrasodium, 2-3% of benzotriazole and water for supplementing 100%.
The preparation method of the water-based cleaning agent comprises the following steps: sequentially adding raw materials of each component weighed according to a certain proportion into a blender, uniformly mixing under high-speed stirring, fully dissolving by inspection, filling into a 200L finished product barrel, and sealing and storing for later use.
The cleaning operation process of the water-based cleaning agent comprises the following steps:
1. the equipment to be washed (column, tank, heat exchanger, etc.) is isolated from the whole system.
2. And emptying materials and oil gas in the equipment.
3. The apparatus is filled with water which can be circulated.
4. And opening a steam valve, introducing steam, and heating to 60-80 ℃.
5. And opening the material inlet and outlet valve of the equipment, and connecting the pump to form a circulation loop.
6. The cleaning agent is injected from the bottom of the device. The cleaning is carried out circularly for 8-12 hours, and sampling is carried out every 1 hour midway.
7. And after the cleaning is finished, cleaning residual liquid and discharging the residual liquid into a sewage pool.
The water-based cleaning agent can be used for devices such as ethylene cracking, catalytic cracking, delayed coking, aromatic hydrocarbon combination, hydrofining and the like.
The invention has the following beneficial effects:
(1) the cleaning effect is good. The decontamination cleaning capability is strong, the cleaning time can be controlled within 48 hours, and the equipment and the pipeline are clean without residual cleaning agent after cleaning. Cleaned in-plant H2S content no more than 5ppm, NH3≯10ppm。
(2) No damage to the cleaning workpiece and no corrosion. The corrosion rate to carbon steel equipment is less than or equal to 1g/m2H; almost has no corrosion to stainless steel equipment. Is far lower than 6g/m of the cleaning industry standard (HG/T2387-2007 Industrial cleaning quality Standard)2·h。
(3) The use is safe. The water-based cleaning agent has no flash point, is non-combustible and non-explosive, and is safe to use. The cleaned equipment is exposed to the air, and the FeS spontaneous combustion phenomenon does not occur.
(4) Is non-toxic and harmless. The cleaning process has no adverse effect on environmental protection, no toxic gas and no harm to human body. The pH value of the waste liquid is between 6 and 10, and the waste liquid can be directly discharged to a sewage treatment plant without causing impact on the sewage treatment plant.
Drawings
Fig. 1 is a photograph of a bottom-washed DCC fractionation system fractionation column C201 of the university of bluestone ltd, celebration.
Fig. 2 is a photograph of a DCC fractionation system fractionator C201 sump of daqing china ltd after cleaning.
Fig. 3 is a photograph of a washed tray of a DCC fractionation system fractionator C201 of the university of bluestone ltd, celebration.
Fig. 4 is a photograph of a washed distillation overhead reflux drum D201 of a DCC fractionation system of the blue chemical corporation, yoqing.
Fig. 5 is a photograph of a washed front cooler E203 of a DCC fractionation system fractionation tower of the university of bluestone ltd, celebration.
Detailed Description
The technical solution of the present invention is further explained below with reference to the detailed description and the accompanying drawings. The following embodiments are merely illustrative of the present invention, and do not limit the scope of the present invention. The methods of the present invention are conventional in the art unless otherwise specified. The chemical agents referred to in the present invention are commercially available unless otherwise specified.
Example 1. a water-based cleaning agent for petrochemical equipment cleaning, comprising the following components in percentage by mass,
11 percent of fatty alcohol-polyoxyethylene ether
Tetrahydrofuran-2-methanol 20%
16 percent of triethanolamine
EDTA tetrasodium 0.2%
2.5 percent of benzotriazole
Water makes up to 100%.
The preparation method comprises the following steps: sequentially adding raw materials of each component weighed according to a certain proportion into a blender, uniformly mixing under high-speed stirring, fully dissolving by inspection, filling into a 200L finished product barrel, and sealing and storing for later use.
Example 2. a water-based cleaning agent for petrochemical equipment cleaning, comprising the following components in percentage by mass,
12 percent of fatty alcohol-polyoxyethylene ether
Tetrahydrofuran-2-methanol 20%
Triethanolamine 18 percent
EDTA tetrasodium 0.15%
2.7 percent of benzotriazole
Water makes up to 100%.
The preparation method is the same as example 1.
Example 3. a water-based cleaning agent for petrochemical equipment cleaning, comprising the following components in percentage by mass,
fatty alcohol polyoxyethylene ether 13%
Tetrahydro-2-furaldehyde 22%
Diethanolamine 19%
EDTA disodium 0.1%
3 percent of benzotriazole
Water makes up to 100%.
The preparation method is the same as example 1.
Example 4. a water-based cleaning agent for petrochemical equipment cleaning, comprising the following components in percentage by mass,
10% of fatty acid polyoxyethylene ether
Tetrahydro-2-furaldehyde 18%
Monoethanolamine 15%
EDTA tetrasodium 0.1%
2 percent of rosin maleamide ethanol
Water makes up to 100%.
The preparation method is the same as example 1.
Example 5. a water-based cleaning agent for petrochemical equipment cleaning, comprising the following components in percentage by mass,
fatty acid polyoxyethylene ether: fatty alcohol-polyoxyethylene ether 1: 212%
Tetrahydrofuran-2-methanol 19%
17 percent of triethanolamine
EDTA tetrasodium 0.1%
2 percent of rosin maleamide ethanol
Water makes up to 100%.
The preparation method is the same as example 1.
Example 6. a water-based cleaning agent for petrochemical equipment cleaning, comprising the following components in percentage by mass,
10.5 percent of fatty acid polyoxyethylene ether
Mixing tetrahydrofuran-2-furaldehyde and tetrahydrofuran-2-methanol at any ratio to obtain 21%
Diethanolamine 18%
EDTA disodium 0.2%
2.8 percent of benzotriazole
Water makes up to 100%.
The preparation method is the same as example 1.
Test example I, measurement of COD, BOD and Corrosion Rate
The cleaning agent samples of the embodiment 1 and the embodiment 2 of the invention are sent to a chemical and physical detection center of nonmetal materials in weapon industry for detecting COD, BOD and corrosion rate according to the standard that the COD: GB 11914-89; BOD: GB 7488-87; metal corrosion rate: measuring metal corrosion rate and total corrosion amount in chemical cleaning of GB/T25147-2010 industrial equipment by a gravimetric method; the results are shown in Table 1.
TABLE 1 COD, BOD and Corrosion Rate test results for the Water-based cleaning agent of the present invention
It can be seen that the cleaning agent disclosed by the invention corrodes carbon steel equipment when in useThe rate is less than or equal to 1g/m2H; almost has no corrosion to stainless steel equipment. Is far lower than 6g/m of the cleaning industry standard (HG/T2387-2007 Industrial cleaning quality Standard)2H. Test example II detection of Scale removal Rate
The water-based cleaning agents prepared in examples 1 to 6 were subjected to a scale removal test, and the results are shown in Table 2.
TABLE 2 detection results of the scale removal rate of the water-based cleaning agent of the present invention
Industrial cleaning application example one: cleaning application of DCC device fractionating tower of Daqing Zhongyangshi chemical company Limited
One, reason and purpose
Blue petrochemical company Limited operates one in the year of 2016 and 8 months and overhauls in Daqing, and in order to ensure that the system equipment internals are clean before overhauing during the overhaul, there is not obvious a large amount of fatlutes, greasy dirt to pile up, can deliver the maintenance smoothly, need carry out the cleaning treatment entirely to the system. Therefore, the cleaning agent of example 1 of the present invention was used to perform a full cleaning treatment on the apparatus, and the full cleaning effect of the apparatus was summarized.
Second, cleaning scope
One DCC fractionation column system was run.
Record of three, full cleaning process
Formally constructing the water-based cleaning agent at the beginning of 15:00 at 9 th and 8 th of 8 and 11 th of 9:00 and finishing the water-based cleaning, and testing that the water-based cleaning effect meets the requirements. Specific cleaning process records are shown in tables 3-6.
TABLE 3 cleaning Process control record I
TABLE 4 cleaning Process control record II
TABLE 5 cleaning Process control record III
TABLE 6 cleaning Process control record IV
Fourth, cleaning effect
Fig. 1 to 5 show the cleaning results, and fig. 1 to 5 are photographs of the bottom of the fractionating tower C201, the sump of the fractionating tower C201, the tray of the fractionating tower C201, the reflux drum D201 at the top of the fractionating tower, and the pre-cooler E203 of the fractionating tower, respectively, after cleaning. As can be seen from the figure, the cleaning effect is good.
The cleaning results are summarized as follows:
1. the cleaning time is controlled within 48 hours, and the condition that the equipment is put in air and self-ignites is eliminated.
2. The cleaned equipment is exposed to the air, and the FeS spontaneous combustion phenomenon does not occur.
3. Cleaned in-plant H2S content no more than 5ppm, NH3≯10ppm。
4. The cleaning process has no adverse effect on environmental protection, no toxic gas is generated, the pH value of the waste liquid is between 6 and 9, the waste liquid can be directly discharged to a sewage treatment plant, and no impact is caused to the sewage treatment plant.
5. Has no corrosion to the cleaned equipment and no harm to human body.
6. The equipment and the pipeline are clean after cleaning, and no residual cleaning agent exists.
Claims (2)
1. A water-based cleaning agent for cleaning petrochemical equipment is characterized by comprising the following components in percentage by mass: 10-13% of fatty alcohol-polyoxyethylene ether, 18-22% of tetrahydrofuran-2-methanol, 15-19% of triethanolamine, 0.1-0.2% of EDTA tetrasodium, 2-3% of benzotriazole and water for supplementing 100%.
2. The water-based cleaning agent for petrochemical equipment according to claim 1, wherein the water-based cleaning agent is used for cleaning an ethylene cracking unit, a catalytic cracking unit, a delayed coking unit, an aromatic hydrocarbon combination unit and a hydrorefining unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710207193.1A CN106867697B (en) | 2017-03-31 | 2017-03-31 | Water-based cleaning agent for cleaning petrochemical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710207193.1A CN106867697B (en) | 2017-03-31 | 2017-03-31 | Water-based cleaning agent for cleaning petrochemical equipment |
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| Publication Number | Publication Date |
|---|---|
| CN106867697A CN106867697A (en) | 2017-06-20 |
| CN106867697B true CN106867697B (en) | 2020-05-12 |
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| CN106867697A (en) | 2017-06-20 |
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