CN112371660A - Pipeline cleaning method for edible vinegar production - Google Patents
Pipeline cleaning method for edible vinegar production Download PDFInfo
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- CN112371660A CN112371660A CN202011130324.9A CN202011130324A CN112371660A CN 112371660 A CN112371660 A CN 112371660A CN 202011130324 A CN202011130324 A CN 202011130324A CN 112371660 A CN112371660 A CN 112371660A
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- pipeline
- cleaning
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- alkaline cleaning
- wall
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- 238000004140 cleaning Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000052 vinegar Substances 0.000 title claims abstract description 23
- 235000021419 vinegar Nutrition 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 14
- 238000005238 degreasing Methods 0.000 claims abstract description 14
- 239000002101 nanobubble Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003899 bactericide agent Substances 0.000 claims abstract description 13
- 239000011261 inert gas Substances 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- 239000002455 scale inhibitor Substances 0.000 claims description 12
- -1 alkyl compound Chemical class 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 4
- 150000003242 quaternary ammonium salts Chemical group 0.000 claims description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 4
- 239000001488 sodium phosphate Substances 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 4
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 4
- 235000019801 trisodium phosphate Nutrition 0.000 claims description 4
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims description 3
- 229940077388 benzenesulfonate Drugs 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000001093 anti-cancer Effects 0.000 description 1
- 230000003110 anti-inflammatory effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013124 brewing process Methods 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 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
-
- 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
-
- 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
- C11D1/02—Anionic compounds
- C11D1/37—Mixtures of compounds all of which are anionic
-
- 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
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/06—Phosphates, including polyphosphates
-
- 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
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/08—Silicates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2230/00—Other cleaning aspects applicable to all B08B range
- B08B2230/01—Cleaning with steam
-
- 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
- C11D1/02—Anionic compounds
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
- C11D1/146—Sulfuric acid esters
-
- 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
- C11D1/02—Anionic compounds
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
Abstract
A pipeline cleaning method for edible vinegar production comprises the following steps: (1) blowing steam into the pipeline to be cleaned, fumigating and washing the inner wall of the pipeline by using clean water; (2) degreasing the inner wall of the pipeline; (3) spraying alkaline cleaning solution into the pipeline; before the alkaline cleaning liquid enters the high-pressure cleaning gun, introducing the alkaline cleaning liquid and inert gas into the micro-nano bubble device to form an alkaline cleaning liquid-inert gas micro-nano bubble mixed system; (4) emptying the alkaline cleaning solution, and repeating the steps (1) - (3) for 2-3 times; (5) finally, the pipeline is washed by sequentially adopting a bactericide and clear water; the inner wall of the pipeline is cleaned by adopting steam and cleaning fluid alternately, and the inner wall of the pipeline expands with heat and contracts with cold after being heated and cooled, so that acid scale on the inner wall of the pipeline is easier to fall off; the alkaline cleaning liquid-inert gas micro-nano bubble mixed system is used as the cleaning liquid, and the micro-nano bubbles are broken on the surface and inside of dirt, so that the cleaning power of the dirt can be improved, the regeneration of accumulated dirt can be inhibited, and the corrosion of a pipeline is effectively prevented.
Description
Technical Field
The invention relates to the technical field of food preparation, in particular to a brewing process of flavor vinegar.
Background
The vinegar has antibacterial, antiinflammatory, fatigue relieving, antioxidant, antiaging, skin caring, anticancer, and cancer preventing effects, and can be used in daily life and medicine. The fruit vinegar is rich in nutrient components, contains major elements, trace elements, organic matters and the like necessary for human bodies, and can maintain physiological balance and prevent diseases. At present, the daily intake of the vinegar cannot reach the average level of people, and the development of vinegar products has wide prospects;
need use various pipelines in the vinegar product production to carry edible vinegar to packing region, generally because the temperature reduces, crystallization situation can take place for acetic acid, and accumulated in the month can generate more sour dirt at the pipeline inner wall, blocks up the pipeline, is difficult to wash, has to breed the bacterium moreover, pollutes the possibility of follow-up product, consequently, needs to have a simple effectual method that can rinse edible vinegar transport pipe way thoroughly.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a pipeline cleaning method for edible vinegar production, which is characterized by comprising the following steps:
(1) blowing steam into the pipeline to be cleaned, fumigating for 10-15min, and washing the inner wall of the pipeline with clear water;
(2) degreasing the inner wall of the pipeline;
(3) spraying alkaline cleaning solution into the pipeline by using a high-pressure cleaning gun for 3-8min, and recovering the alkaline cleaning solution from the tail end of the pipeline; before the alkaline cleaning liquid enters the high-pressure cleaning gun, introducing the alkaline cleaning liquid and inert gas into the micro-nano bubble device to form an alkaline cleaning liquid-inert gas micro-nano bubble mixed system;
(4) emptying the alkaline cleaning solution in the pipeline, and repeating the steps (1) to (3) for 2 to 3 times;
(5) and finally, sequentially adopting a bactericide and clear water to flush the pipeline.
Preferably, in the step (2), the inner wall of the pipeline is degreased by using degreasing fluid.
Preferably, in the step (3), an ultrasonic device is fixed on the outer wall of the pipeline, and is started while the hot alkali cleaning solution is sprayed.
Preferably, the alkaline cleaning solution further comprises a scale inhibitor, and the dosage of the scale inhibitor is 2-6% of that of the alkaline cleaning solution.
Preferably, the temperature of the alkaline cleaning solution is 40-50 ℃.
Preferably, the spraying pressure of the high-pressure cleaning gun is 5-10 Mpa.
Preferably, the bactericide is a single-chain or double-chain alkyl compound bactericide containing a quaternary ammonium salt group.
Preferably, the degreasing fluid comprises the following components in parts by weight: 10-15 parts of sodium dodecyl benzene sulfonate, 5-9 parts of sodium dodecyl sulfate, 3-5 parts of trisodium phosphate, 2.5-3.5 parts of sodium silicate, 0.5-1.2 parts of cleaning assistant and 40-60 parts of clear water.
Preferably, the scale inhibitor is sodium alkyl benzene sulfonate or amino trimethylene phosphonic acid.
Compared with the prior art, the invention has the beneficial effects that: the inner wall of the pipeline is alternately cleaned by adopting steam and cleaning fluid, and the inner wall of the pipeline expands with heat and contracts with cold after being heated and cooled, so that acid scale on the inner wall of the pipeline is easier to fall off; the alkaline cleaning liquid-inert gas micro-nano bubble mixed system is used as the cleaning liquid, and the micro-nano bubbles are broken on the surface and inside of dirt, so that the cleaning power of the dirt can be improved, the regeneration of accumulated dirt can be inhibited, and the corrosion of a pipeline is effectively prevented.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A pipeline cleaning method for edible vinegar production is characterized by comprising the following steps:
(1) blowing steam into the pipeline to be cleaned, fumigating for 12min, and washing the inner wall of the pipeline with clear water;
(2) degreasing the inner wall of the pipeline by using degreasing fluid;
(3) spraying alkaline cleaning solution into the pipeline by using a high-pressure cleaning gun for 4min, and recovering the alkaline cleaning solution from the tail end of the pipeline; before the alkaline cleaning liquid enters the high-pressure cleaning gun, introducing the alkaline cleaning liquid and inert gas into the micro-nano bubble device to form an alkaline cleaning liquid-inert gas micro-nano bubble mixed system; an ultrasonic device is fixed on the outer wall of the pipeline, and is started when hot alkali cleaning liquid is sprayed;
(4) emptying the alkaline cleaning solution in the pipeline, and repeating the steps (1) to (3) for 2 times;
(5) and finally, sequentially adopting a bactericide and clear water to flush the pipeline.
In the technical scheme, the alkaline cleaning solution also comprises a scale inhibitor, and the dosage of the scale inhibitor is 5% of that of the alkaline cleaning solution.
In the technical scheme, the temperature of the alkaline cleaning solution is 40-50 ℃.
In the technical scheme, the spraying pressure of the high-pressure cleaning gun is 5-10 Mpa.
In the technical scheme, the bactericide is a single-chain or double-chain alkyl compound bactericide containing a quaternary ammonium salt group.
In the technical scheme, the degreasing fluid comprises the following components in parts by weight: 13 parts of sodium dodecyl benzene sulfonate, 6 parts of sodium dodecyl sulfate, 4 parts of trisodium phosphate, 2.5 parts of sodium silicate, 0.8 part of cleaning assistant and 55 parts of clear water.
In the technical scheme, the scale inhibitor is sodium alkyl benzene sulfonate.
Example 2
A pipeline cleaning method for edible vinegar production is characterized by comprising the following steps:
(1) blowing steam into the pipeline to be cleaned, fumigating for 15min, and washing the inner wall of the pipeline with clear water;
(2) degreasing the inner wall of the pipeline by using degreasing fluid;
(3) spraying alkaline cleaning solution into the pipeline by using a high-pressure cleaning gun for 6min, and recovering the alkaline cleaning solution from the tail end of the pipeline; before the alkaline cleaning liquid enters the high-pressure cleaning gun, introducing the alkaline cleaning liquid and inert gas into the micro-nano bubble device to form an alkaline cleaning liquid-inert gas micro-nano bubble mixed system; an ultrasonic device is fixed on the outer wall of the pipeline, and is started when hot alkali cleaning liquid is sprayed;
(4) emptying the alkaline cleaning solution in the pipeline, and repeating the steps (1) to (3) for 3 times;
(5) and finally, sequentially adopting a bactericide and clear water to flush the pipeline.
In the technical scheme, the alkaline cleaning liquid also comprises a scale inhibitor, and the dosage of the scale inhibitor is 2-6% of that of the alkaline cleaning liquid.
In the technical scheme, the temperature of the alkaline cleaning solution is 40-50 ℃.
In the technical scheme, the spraying pressure of the high-pressure cleaning gun is 5-10 Mpa.
In the technical scheme, the bactericide is a single-chain or double-chain alkyl compound bactericide containing a quaternary ammonium salt group.
In the technical scheme, the degreasing fluid comprises the following components in parts by weight: 13 parts of sodium dodecyl benzene sulfonate, 5 parts of sodium dodecyl sulfate, 4 parts of trisodium phosphate, 2.5 parts of sodium silicate, 1.2 parts of cleaning assistant and 60 parts of clear water.
In the technical scheme, the scale inhibitor is amino trimethylene phosphonic acid.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A pipeline cleaning method for edible vinegar production is characterized by comprising the following steps:
(1) blowing steam into the pipeline to be cleaned, fumigating for 10-15min, and washing the inner wall of the pipeline with clear water;
(2) degreasing the inner wall of the pipeline;
(3) spraying alkaline cleaning solution into the pipeline by using a high-pressure cleaning gun for 3-8min, and recovering the alkaline cleaning solution from the tail end of the pipeline; before the alkaline cleaning liquid enters the high-pressure cleaning gun, introducing the alkaline cleaning liquid and inert gas into the micro-nano bubble device to form an alkaline cleaning liquid-inert gas micro-nano bubble mixed system;
(4) emptying the alkaline cleaning solution in the pipeline, and repeating the steps (1) to (3) for 2 to 3 times;
(5) and finally, sequentially adopting a bactericide and clear water to flush the pipeline.
2. The method for cleaning the pipeline for the production of edible vinegar according to claim 1, wherein the method comprises the following steps: and (2) degreasing the inner wall of the pipeline by using degreasing fluid.
3. The method for cleaning the pipeline for the production of edible vinegar according to claim 1, wherein the method comprises the following steps: and (3) fixing an ultrasonic device on the outer wall of the pipeline, and starting the ultrasonic device while spraying the hot alkali cleaning solution.
4. The method for cleaning the pipeline for the production of edible vinegar according to claim 1, wherein the method comprises the following steps: the alkaline cleaning liquid also comprises a scale inhibitor, and the dosage of the scale inhibitor is 2-6% of that of the alkaline cleaning liquid.
5. The method for cleaning the pipeline for the production of edible vinegar according to claim 1, wherein the method comprises the following steps: the temperature of the alkaline cleaning solution is 40-50 ℃.
6. The method for cleaning the pipeline for the production of edible vinegar according to claim 1, wherein the method comprises the following steps: the spraying pressure of the high-pressure cleaning gun is 5-10 Mpa.
7. The method for cleaning the pipeline for the production of edible vinegar according to claim 1, wherein the method comprises the following steps: the bactericide is a single-chain or double-chain alkyl compound bactericide containing quaternary ammonium salt groups.
8. The method for cleaning the pipeline for the production of edible vinegar according to claim 2, wherein the method comprises the following steps: the degreasing fluid comprises the following components in parts by weight: 10-15 parts of sodium dodecyl benzene sulfonate, 5-9 parts of sodium dodecyl sulfate, 3-5 parts of trisodium phosphate, 2.5-3.5 parts of sodium silicate, 0.5-1.2 parts of cleaning assistant and 40-60 parts of clear water.
9. The method for cleaning the pipeline for the production of edible vinegar according to claim 4, wherein the method comprises the following steps: the scale inhibitor is sodium alkyl benzene sulfonate or amino trimethylene phosphonic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011130324.9A CN112371660A (en) | 2020-10-21 | 2020-10-21 | Pipeline cleaning method for edible vinegar production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011130324.9A CN112371660A (en) | 2020-10-21 | 2020-10-21 | Pipeline cleaning method for edible vinegar production |
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| Publication Number | Publication Date |
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| CN112371660A true CN112371660A (en) | 2021-02-19 |
Family
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| CN202011130324.9A Pending CN112371660A (en) | 2020-10-21 | 2020-10-21 | Pipeline cleaning method for edible vinegar production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974425A (en) * | 2021-03-12 | 2021-06-18 | 武汉钢铁有限公司 | Descaling method and device for steel rolling equipment pipeline |
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Cited By (1)
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| CN112974425A (en) * | 2021-03-12 | 2021-06-18 | 武汉钢铁有限公司 | Descaling method and device for steel rolling equipment pipeline |
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