CN112845413A - Steel pipe cleaning method - Google Patents
Steel pipe cleaning method Download PDFInfo
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- CN112845413A CN112845413A CN201911172532.2A CN201911172532A CN112845413A CN 112845413 A CN112845413 A CN 112845413A CN 201911172532 A CN201911172532 A CN 201911172532A CN 112845413 A CN112845413 A CN 112845413A
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- Prior art keywords
- steel pipe
- cleaning
- pipeline
- cleaning method
- water
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- 238000004140 cleaning Methods 0.000 title claims abstract description 80
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000011010 flushing procedure Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 16
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 239000012459 cleaning agent Substances 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 9
- 229910021389 graphene Inorganic materials 0.000 claims description 9
- ICLYJLBTOGPLMC-KVVVOXFISA-N (z)-octadec-9-enoate;tris(2-hydroxyethyl)azanium Chemical compound OCCN(CCO)CCO.CCCCCCCC\C=C/CCCCCCCC(O)=O ICLYJLBTOGPLMC-KVVVOXFISA-N 0.000 claims description 8
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 8
- 235000006408 oxalic acid Nutrition 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- 229940117013 triethanolamine oleate Drugs 0.000 claims description 8
- 239000002270 dispersing agent Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- -1 sulfur ion Chemical class 0.000 claims description 2
- 239000004519 grease Substances 0.000 abstract description 14
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 9
- 150000004706 metal oxides Chemical class 0.000 abstract description 9
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical group COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 239000004480 active ingredient Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/06—Hydroxides
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/08—Acids
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/10—Salts
- C11D7/12—Carbonates bicarbonates
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/263—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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/265—Carboxylic acids or salts thereof
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3245—Aminoacids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a steel pipe cleaning method, which comprises the following steps: (1) flushing cleaning liquid into the pipeline to be cleaned by using high-pressure gas pulses, and introducing ultrasonic waves; (2) injecting rinsing liquid or a gas-liquid mixture of the rinsing liquid and compressed gas into the pipeline; (3) introducing hot gas into the pipeline, and heating the temperature inside the pipeline to 90-160 ℃; (4) and introducing compressed gas with the temperature of 80-120 ℃ into the pipeline to obtain the cleaned steel pipe. The cleaning method comprises the steps of firstly cleaning grease on the inner surface of the steel pipe through cleaning liquid combined with high-pressure gas pulse and ultrasonic wave, and then further removing metal oxide and grease on the inner surface of the steel pipe under the action of rinsing liquid or rinsing liquid and compressed gas.
Description
Technical Field
The invention relates to a metal cleaning method, in particular to a steel pipe cleaning method.
Background
Steel pipes are manufactured using grease or metal oxides and further processed to remove these contaminants. Degreasing or pickling processes are generally used for the dirt, and means such as high-pressure washing, ultrasonic waves, brushes, cleaning balls and the like are used for improving the cleaning efficiency. The processes are effective in cleaning large-caliber pipes and the outer walls of the pipes, but the cleaning effect of the inner walls of the small-caliber pipes is not obvious. Therefore, it is necessary to develop a method for cleaning the inner wall of the small-diameter pipe.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a steel pipe cleaning method.
In order to achieve the purpose, the invention adopts the technical scheme that: a steel pipe cleaning method comprises the following steps:
(1) flushing cleaning liquid into the pipeline to be cleaned by using high-pressure gas pulses, and introducing ultrasonic waves; the pressure of the cleaning liquid is 1.0-3.5 MPa, the temperature is 30-50 ℃, and the flow speed is 3-15 m/s;
(2) injecting rinsing liquid or a gas-liquid mixture of the rinsing liquid and compressed gas into the pipeline;
(3) introducing hot gas into the pipeline, and heating the temperature inside the pipeline to 90-160 ℃;
(4) and introducing compressed gas with the temperature of 80-120 ℃ into the pipeline to obtain the cleaned steel pipe.
The cleaning method comprises the steps of firstly cleaning the grease on the inner surface of the steel pipe by using a cleaning solution in combination with high-pressure gas pulse and ultrasonic wave, wherein when the cleaning solution adopts the pressure, the temperature and the flow rate, the damage degree to the pipeline is small, and the cleaning effect on the attached grease is good; and then under the action of rinsing liquid or rinsing liquid and compressed gas, further removing metal oxides and grease on the inner surface of the steel pipe, and finally, raising the temperature in the pipeline to release active ingredients, namely the rinsing liquid and cleaning liquid, remained on the pipe wall to form an anti-rust layer. The method has the advantages of good cleaning effect, less cleaning times and low cleaning cost, and can solve the problem of cleaning metal oxides and grease on the inner wall of the small-caliber steel pipe.
As a preferred embodiment of the steel pipe cleaning method, the cleaning solution comprises the following components in percentage by weight: 25-35% of phosphoric acid, 5-10% of oxalic acid, 1-3% of triethanolamine oleate, 1-4% of an alcohol ether solvent and the balance of water. The cleaning liquid, the high-pressure gas pulse and the ultrasonic wave are combined to achieve a good grease removing effect. As a more preferable embodiment of the steel pipe cleaning method, the cleaning solution comprises the following components in percentage by weight: 30% of phosphoric acid, 8% of oxalic acid, 1.5% of triethanolamine oleate, 2.5% of alcohol ether solvent and the balance of water.
As a preferred embodiment of the steel pipe cleaning method, the rinsing liquid comprises the following components in percentage by weight: 13-17% of graphene dispersion, 18-22% of alkaline cleaning agent, 8-12% of dispersing agent and the balance of water. The graphene dispersion is insoluble in water, and can be left on the inner wall of the steel pipe after being cleaned to form a rust-proof layer by heating, and the dispersant is preferably propylene glycol methyl ether.
As a more preferable embodiment of the steel pipe cleaning method, the rinsing liquid comprises the following components in percentage by weight: 15% of graphene dispersion, 20% of alkaline cleaning agent, 10% of dispersing agent and the balance of water.
In a preferred embodiment of the method for cleaning a steel pipe according to the present invention, in the step (2), the pressure of the compressed gas is 0.4 to 0.8 MPa.
As a preferred embodiment of the steel pipe cleaning method, the alkaline cleaning agent comprises the following components in percentage by weight: 13-16% of sodium carbonate, 4-6% of sodium hydroxide, 12-17% of EDTA-2Na and the balance of water.
As a more preferable embodiment of the steel pipe cleaning method, the alkaline cleaning agent comprises the following components in percentage by weight: 15% of sodium carbonate, 5% of sodium hydroxide, 15% of EDTA-2Na and the balance of water.
As a preferable embodiment of the steel pipe cleaning method of the present invention, the hardness of the water is 0 to 20 degrees dGH, the chloride ion content is less than 100PPM, and the sulfur ion content is less than 100 PPM.
The invention has the beneficial effects that: the invention provides a steel pipe cleaning method. The cleaning method comprises the steps of firstly cleaning grease on the inner surface of the steel pipe through cleaning liquid combined with high-pressure gas pulse and ultrasonic wave, and then further removing metal oxide and grease on the inner surface of the steel pipe under the action of rinsing liquid or rinsing liquid and compressed gas.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
In an embodiment of the steel pipe cleaning method of the present invention, the steel pipe cleaning method includes the following steps:
(1) flushing cleaning liquid into a pipeline to be cleaned by using high-pressure gas pulses, and introducing ultrasonic waves, wherein the pressure of the cleaning liquid is 2MPa, the temperature of the cleaning liquid is 44 ℃, and the flow speed of the cleaning liquid is 10 m/s; the cleaning solution comprises the following components in percentage by weight: 30% of phosphoric acid, 8% of oxalic acid, 1.5% of triethanolamine oleate, 2.5% of an alcohol ether solvent and the balance of water;
(2) injecting rinsing liquid or a gas-liquid mixture of the rinsing liquid and compressed gas into the pipeline, wherein the rinsing liquid comprises the following components in percentage by weight: 15% of graphene dispersion, 20% of an alkaline cleaning agent, 10% of propylene glycol methyl ether and the balance of water, wherein the alkaline cleaning agent comprises the following components in percentage by weight: 15% of sodium carbonate, 5% of sodium hydroxide, 15% of EDTA-2Na and the balance of water; the pressure of the compressed gas is 0.5 MPa;
(3) introducing hot gas into the pipeline, and heating the temperature inside the pipeline to 100 ℃;
(4) and introducing compressed gas with the temperature of 110 ℃ and the pressure of 0.5MPa into the pipeline to obtain the cleaned steel pipe.
By adopting the method of the embodiment, more than 99% of grease and metal oxide attached to the inner wall of the steel pipe can be removed.
Example 2
In an embodiment of the steel pipe cleaning method of the present invention, the steel pipe cleaning method includes the following steps:
(1) flushing cleaning liquid into a pipeline to be cleaned by using high-pressure gas pulses, and introducing ultrasonic waves, wherein the pressure of the cleaning liquid is 3MPa, the temperature of the cleaning liquid is 30 ℃, and the flow speed of the cleaning liquid is 15 m/s; the cleaning solution comprises the following components in percentage by weight: 25% of phosphoric acid, 10% of oxalic acid, 1% of triethanolamine oleate, 4% of an alcohol ether solvent and the balance of water;
(2) injecting rinsing liquid or a gas-liquid mixture of the rinsing liquid and compressed gas into the pipeline, wherein the rinsing liquid comprises the following components in percentage by weight: 13% of graphene dispersion, 18% of an alkaline cleaning agent, 12% of propylene glycol methyl ether and the balance of water, wherein the alkaline cleaning agent comprises the following components in percentage by weight: 13% of sodium carbonate, 4% of sodium hydroxide, 17% of EDTA-2Na and the balance of water; the pressure of the compressed gas is 0.8 MPa;
(3) introducing hot gas into the pipeline, and heating the temperature inside the pipeline to 90 ℃;
(4) and introducing compressed gas with the temperature of 80 ℃ and the pressure of 0.8MPa into the pipeline to obtain the cleaned steel pipe.
By adopting the method of the embodiment, more than 98% of grease and metal oxide attached to the inner wall of the steel pipe can be removed.
Example 3
In an embodiment of the steel pipe cleaning method of the present invention, the steel pipe cleaning method includes the following steps:
(1) flushing cleaning liquid into a pipeline to be cleaned by using high-pressure gas pulses, and introducing ultrasonic waves, wherein the pressure of the cleaning liquid is 1MPa, the temperature is 50 ℃, and the flow speed is 10 m/s; the cleaning solution comprises the following components in percentage by weight: 25% of phosphoric acid, 5% of oxalic acid, 3% of triethanolamine oleate, 3% of an alcohol ether solvent and the balance of water;
(2) injecting rinsing liquid or a gas-liquid mixture of the rinsing liquid and compressed gas into the pipeline, wherein the rinsing liquid comprises the following components in percentage by weight: 15% of graphene dispersion, 22% of an alkaline cleaning agent, 8% of propylene glycol methyl ether and the balance of water, wherein the alkaline cleaning agent comprises the following components in percentage by weight: 16% of sodium carbonate, 4% of sodium hydroxide, 15% of EDTA-2Na and the balance of water; the pressure of the compressed gas is 0.5 MPa;
(3) introducing hot gas into the pipeline, and heating the temperature inside the pipeline to 120 ℃;
(4) and introducing compressed gas with the temperature of 100 ℃ and the pressure of 0.5MPa into the pipeline to obtain the cleaned steel pipe.
By adopting the method of the embodiment, more than 98% of grease and metal oxide attached to the inner wall of the steel pipe can be removed.
Example 4
In an embodiment of the steel pipe cleaning method of the present invention, the steel pipe cleaning method includes the following steps:
(1) flushing cleaning liquid into a pipeline to be cleaned by using high-pressure gas pulses, and introducing ultrasonic waves, wherein the pressure of the cleaning liquid is 3.5MPa, the temperature is 35 ℃, and the flow speed is 3 m/s; the cleaning solution comprises the following components in percentage by weight: 20% of phosphoric acid, 10% of oxalic acid, 3% of triethanolamine oleate, 1% of an alcohol ether solvent and the balance of water;
(2) injecting rinsing liquid or a gas-liquid mixture of the rinsing liquid and compressed gas into the pipeline, wherein the rinsing liquid comprises the following components in percentage by weight: 17% of graphene dispersion, 18% of an alkaline cleaning agent, 10% of propylene glycol methyl ether and the balance of water, wherein the alkaline cleaning agent comprises the following components in percentage by weight: 15% of sodium carbonate, 6% of sodium hydroxide, 12% of EDTA-2Na and the balance of water; the pressure of the compressed gas is 0.4 MPa;
(3) introducing hot gas into the pipeline, and heating the temperature inside the pipeline to 160 ℃;
(4) and introducing compressed gas with the temperature of 120 ℃ and the pressure of 0.4MPa into the pipeline to obtain the cleaned steel pipe.
By adopting the method of the embodiment, more than 98% of grease and metal oxide attached to the inner wall of the steel pipe can be removed.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A steel pipe cleaning method is characterized by comprising the following steps:
(1) flushing cleaning liquid into the pipeline to be cleaned by using high-pressure gas pulses, and introducing ultrasonic waves; the pressure of the cleaning liquid is 1.0-3.5 MPa, the temperature is 30-50 ℃, and the flow speed is 3-15 m/s;
(2) injecting rinsing liquid or a gas-liquid mixture of the rinsing liquid and compressed gas into the pipeline;
(3) introducing hot gas into the pipeline, and heating the temperature inside the pipeline to 90-160 ℃;
(4) and introducing compressed gas with the temperature of 80-120 ℃ into the pipeline to obtain the cleaned steel pipe.
2. The steel pipe cleaning method according to claim 1, wherein the cleaning solution comprises the following components in percentage by weight: 25-35% of phosphoric acid, 5-10% of oxalic acid, 1-3% of triethanolamine oleate, 1-4% of an alcohol ether solvent and the balance of water.
3. The steel pipe cleaning method according to claim 2, wherein the cleaning solution comprises the following components in percentage by weight: 30% of phosphoric acid, 8% of oxalic acid, 1.5% of triethanolamine oleate, 2.5% of alcohol ether solvent and the balance of water.
4. The steel pipe cleaning method according to claim 1, wherein the rinsing liquid comprises the following components in percentage by weight: 13-17% of graphene dispersion, 18-22% of alkaline cleaning agent, 8-12% of dispersing agent and the balance of water.
5. The steel pipe cleaning method according to claim 4, wherein the rinsing liquid comprises the following components in percentage by weight: 15% of graphene dispersion, 20% of alkaline cleaning agent, 10% of dispersing agent and the balance of water.
6. The steel pipe cleaning method according to claim 1, wherein in the step (2), the pressure of the compressed gas is 0.4 to 0.8 MPa.
7. The steel pipe cleaning method according to claim 4, wherein the alkaline cleaning agent comprises the following components in percentage by weight: 13-16% of sodium carbonate, 4-6% of sodium hydroxide, 12-17% of EDTA-2Na and the balance of water.
8. The steel pipe cleaning method according to claim 7, wherein the alkaline cleaning agent comprises the following components in percentage by weight: 15% of sodium carbonate, 5% of sodium hydroxide, 15% of EDTA-2Na and the balance of water.
9. The method for cleaning a steel pipe as claimed in any one of claims 1 to 8, wherein the hardness of the water is 0 to 20 ° dGH, the chloride ion content is less than 100PPM, and the sulfur ion content is less than 100 PPM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172532.2A CN112845413A (en) | 2019-11-26 | 2019-11-26 | Steel pipe cleaning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172532.2A CN112845413A (en) | 2019-11-26 | 2019-11-26 | Steel pipe cleaning method |
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| CN112845413A true CN112845413A (en) | 2021-05-28 |
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| CN201911172532.2A Pending CN112845413A (en) | 2019-11-26 | 2019-11-26 | Steel pipe cleaning method |
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