CN110711752B - Deep cooling fast line storage tank oil stain treatment method and device - Google Patents
Deep cooling fast line storage tank oil stain treatment method and device Download PDFInfo
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- CN110711752B CN110711752B CN201910975784.2A CN201910975784A CN110711752B CN 110711752 B CN110711752 B CN 110711752B CN 201910975784 A CN201910975784 A CN 201910975784A CN 110711752 B CN110711752 B CN 110711752B
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- 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
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0804—Cleaning containers having tubular shape, e.g. casks, barrels, drums
- B08B9/0813—Cleaning containers having tubular shape, e.g. casks, barrels, drums by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/147—Microfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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Abstract
The invention discloses a method for treating oil stain on a cryogenic fast-line storage tank. The invention can effectively overcome the defects of oil stain removal by adopting two processes of organic solvent cleaning and nitrogen purging replacement in the prior art, and can completely remove the oil in the deep-cooling express line storage tank.
Description
Technical Field
The invention relates to the technical field of oil stain treatment processes, in particular to a method and a device for treating oil stains on a cryogenic fast line storage tank.
Background
The metal optical fiber laser cutting machine is applied to metal pipe materials and pipe material cutting such as sheet metal processing, stainless steel, galvanized sheet, carbon steel and the like, high temperature is generated by focusing high-energy laser through a lens, wherein nitrogen is used for cooling the lens. The deep cooling express storage tank is 1-5 m in volume3The gas supply mode has the advantages of reducing the frequency of gas replacement of the equipment, along with simple and safe operation.
At present, the deep cooling express line storage tank uses stainless steel or carbon steel in the processing and manufacturing process, and oil stains exist in the post-treatment. At present, the main treatment process aiming at the oil stain adopts organic solvent cleaning and nitrogen purging replacement. However, the cleaning of the organic solution brings new pollution sources and the water content is increased, so the water content needs to be treated in the later period, and the waste organic solvent needs to be treated as waste liquid to reach the standard and then discharged. The nitrogen purging and replacing method mainly adopts the mode that liquid nitrogen is vaporized and then is continuously charged into the deep-cooling express storage tank for discharging, the treatment effect of the method is not obvious, and due to the fact that the boiling point of oil stains is extremely high and the temperature of the vaporized liquid nitrogen is low, the vaporized nitrogen directly purges the oil stains in the storage tank and cannot be effectively removed, and a great amount of trace oil stains cannot be completely removed after being adsorbed on the inner wall.
Disclosure of Invention
The invention aims to provide a method and a device for treating oil stain in a cryogenic fast line storage tank, which can effectively overcome the defects of oil stain removal by adopting two processes of organic solvent cleaning and nitrogen purging replacement in the prior art, and can completely remove oil in the cryogenic fast line storage tank.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a deep cooling express line storage tank oil stain treatment method comprises the following steps:
step one, preheating a heating device to a set temperature;
vaporizing the liquid nitrogen to obtain nitrogen and filtering;
step three, introducing the filtered nitrogen into the heating device preheated in the step one for heating;
step four, the heated nitrogen is communicated to a liquid phase inlet of a deep cooling express line storage tank through a pipeline;
opening a liquid phase inlet of the cryogenic express line storage tank to enable nitrogen to enter the cryogenic express line storage tank, closing the liquid phase inlet of the cryogenic express line storage tank when the pressure of the nitrogen in the cryogenic express line storage tank is greater than 0.3MPa, and simultaneously opening a gas phase outlet and a discharge port of the cryogenic express line storage tank for purging;
step six, when the pressure of nitrogen in the cryogenic express line storage tank is reduced to be less than 0.05MPa, closing a gas phase outlet and a discharge port of the cryogenic express line storage tank;
step seven, repeating the step five and the step six for 2 times;
step eight, keeping the nitrogen at the liquid phase inlet of the cryogenic express line storage tank to be introduced, opening the gas phase outlet of the cryogenic express line storage tank, keeping the liquid phase inlet of the cryogenic express line storage tank to be opened after the nitrogen pressure in the cryogenic express line storage tank is kept at 0.3MPa, continuously keeping the nitrogen pressure in the cryogenic express line storage tank at 0.3MPa, and continuously purging;
and step nine, after the purging in the step eight is completed, the nitrogen pressure in the cryogenic fast line storage tank is vented to 0.05MPa, the gas phase outlet and the liquid phase inlet are closed, the heating device is stopped from heating, and the oil stain treatment of the cryogenic fast line storage tank is finished.
In the above technical scheme, the heating device in the first step is a heating column, and a nitrogen inlet valve is arranged at an inlet of the heating column.
In the above technical solution, the set temperature of the heating device in the first step is 105 ℃.
In the above technical scheme, in the second step, an air temperature vaporizer is selected to vaporize the liquid nitrogen, and a 0.01 micron filter is selected to filter the nitrogen.
Among the above-mentioned technical scheme, the liquid phase import of cryrogenic fast line storage tank is provided with liquid phase inlet valve, the gaseous phase export of cryrogenic fast line storage tank is provided with gaseous phase gas outlet valve, the discharge port of cryrogenic fast line storage tank is provided with discharge valve.
In the above technical scheme, in the eighth step, when the deep cooling express line storage tank is 1m3Or 3m3When the fast line storage tank is deeply cooled, the continuous purging time is 3 hours; when the deep cooling express line storage tank is 5m3When the fast line storage tank is deeply cooled, the continuous purging time is 5 hours.
A deep cooling express storage tank oil stain treatment device comprises an air temperature type vaporizer, a filter, a heating column and a deep cooling express storage tank;
liquid nitrogen is introduced into a feeding hole of the air-temperature vaporizer, a discharging hole of the air-temperature vaporizer is connected to a feeding hole of a filter through a pipeline, a discharging hole of the filter is connected to an inlet of a heating column through a pipeline, an outlet of the heating column is connected to a liquid phase inlet of a deep-cooling fast line storage tank through a pipeline, and a gas phase outlet and a discharging hole are further formed in the deep-cooling fast line storage tank;
the inlet of the heating column is provided with a nitrogen gas inlet valve, the liquid phase inlet is provided with a liquid phase inlet valve, the gas phase outlet is provided with a gas phase gas outlet valve, and the discharge port is provided with a discharge valve.
In the above technical scheme, the filter is a 0.01 micron filter.
In the technical scheme, the outer wall of the heating column is sleeved with the heat insulation sleeve.
In the technical scheme, the deep cooling express line storage tank is 1m in size3、3m3Or 5m3The cryogenic fast line storage tank.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the method has the advantages that the nitrogen is heated, so that trace grease adsorbed on the inner wall of the cryogenic express line storage tank can be vaporized, and the cryogenic express line storage tank is thoroughly cleaned;
2. the method adopts replacement methods, namely firstly, the grease is carried out of the storage tank by high-pressure and low-pressure replacement and high-pressure airflow, and secondly, the grease is continuously blown and swept by a long-time constant-temperature and constant-pressure mode, and the oil stain on the inner wall of the deep-cooling express line storage tank is fully removed by combining two operation methods;
3. the invention does not add extra pollution to the cryogenic fast line storage tank, and meanwhile, the direct discharge of the blown nitrogen does not influence the environment.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus according to a first embodiment of the present invention.
Wherein: 1. an air-temperature vaporizer; 2. a filter; 3. heating the column; 4. a cryogenic fast line storage tank; 5. a nitrogen inlet valve; 6. a liquid phase inlet valve; 7. a gas phase gas outlet valve; 8. and (4) a discharge valve.
Detailed Description
The invention is further described with reference to the following figures and examples:
the first embodiment is as follows:
the embodiment relates to a deep cooling express line storage tank oil stain treatment method, which comprises the following steps:
step one, preheating a heating device to a set temperature;
vaporizing the liquid nitrogen to obtain nitrogen and filtering;
step three, introducing the filtered nitrogen into the heating device preheated in the step one for heating;
step four, the heated nitrogen is communicated to a liquid phase inlet of a deep cooling express line storage tank through a pipeline;
opening a liquid phase inlet of the cryogenic express line storage tank to enable nitrogen to enter the cryogenic express line storage tank, closing the liquid phase inlet of the cryogenic express line storage tank when the pressure of the nitrogen in the cryogenic express line storage tank is greater than 0.3MPa, and simultaneously opening a gas phase outlet and a discharge port of the cryogenic express line storage tank for purging;
step six, when the pressure of nitrogen in the cryogenic express line storage tank is reduced to be less than 0.05MPa, closing a gas phase outlet and a discharge port of the cryogenic express line storage tank;
step seven, repeating the step five and the step six for 2 times;
step eight, at the moment, introducing nitrogen at a liquid phase inlet of the cryogenic express line storage tank, opening a gas phase outlet of the cryogenic express line storage tank, keeping the pressure of the nitrogen in the cryogenic express line storage tank at 0.3MPa, keeping the liquid phase inlet of the cryogenic express line storage tank open, continuously keeping the pressure of the nitrogen in the cryogenic express line storage tank at 0.3MPa, and continuously purging;
and step nine, after the purging in the step eight is completed, the nitrogen pressure in the cryogenic fast line storage tank is vented to 0.05MPa, the gas phase outlet and the liquid phase inlet are closed, the heating device is stopped from heating, and the oil stain treatment of the cryogenic fast line storage tank is finished.
Hereinbefore, the fifth and sixth steps are high and low pressure operation, and the eighth step is high pressure purge.
In this embodiment, the heating device in the first step is a heating column, and a nitrogen inlet valve is arranged at an inlet of the heating column.
In this embodiment, the set temperature of the heating device in the first step is 105 ℃.
In this embodiment, in the second step, an air temperature vaporizer is used to vaporize the liquid nitrogen, and a 0.01 μm filter is used to filter the nitrogen.
In this embodiment, the liquid phase import of cryrogenic fast line storage tank is provided with liquid phase import valve, the gaseous phase export of cryrogenic fast line storage tank is provided with gaseous phase gas outlet valve, the discharge port of cryrogenic fast line storage tank is provided with discharge valve.
In particular, the liquid phase inlet is located below the gas phase outlet.
In this embodiment, in the eighth step, after the pressure of the nitrogen gas in the cryogenic fast line storage tank is maintained at 0.3MPa by adjusting the gas phase gas outlet valve, the liquid phase inlet valve is opened, and the pressure of the nitrogen gas in the cryogenic fast line storage tank is maintained at 0.3MPa by adjusting the gas phase gas outlet valve, so-called lower-inlet and upper-outlet.
In this embodiment, in the eighth step, when the deep cooling express line storage tank is 1m3Or 3m3When the fast line storage tank is deeply cooled, the continuous purging time is 3 hours; when the deep cooling express line storage tank is 5m3When the fast line storage tank is deeply cooled, the continuous purging time is 5 hours.
Referring to fig. 1, the embodiment also relates to a deep cooling express line storage tank oil stain treatment device, which comprises an air temperature type vaporizer 1, a filter 2, a heating column 3 and a deep cooling express line storage tank 4;
liquid nitrogen is introduced into a feeding hole of the air-temperature vaporizer, a discharging hole of the air-temperature vaporizer is connected to a feeding hole of a filter through a pipeline, a discharging hole of the filter is connected to an inlet of a heating column through a pipeline, an outlet of the heating column is connected to a liquid phase inlet of a deep-cooling fast line storage tank through a pipeline, and a gas phase outlet and a discharging hole are further formed in the deep-cooling fast line storage tank;
the inlet of the heating column is provided with a nitrogen inlet valve 5, the liquid phase inlet is provided with a liquid phase inlet valve 6, the gas phase outlet is provided with a gas phase outlet valve 7, and the discharge port is provided with a discharge valve 8.
In this embodiment, the filter is a 0.01 μm filter.
In this embodiment, the outer wall of the heating column is sleeved with a heat insulation sleeve.
In this embodiment, the deep cooling express line storage tank selects 1m3、3m3Or 5m3Deep cooling express lineAnd (4) storage tank.
The principle of the invention is as follows: the liquid nitrogen is vaporized by a vaporizing device, the pressure is increased to 0.5MPa, and the liquid nitrogen is filtered by a filter and enters a heating device for heating. Heating to 105 ℃, and introducing into a cryogenic fast line storage tank for replacement treatment.
Safety precautions: the worker should wear the labor protection articles correctly, including cotton long-sleeve work clothes, safety shoes, safety helmets, protective gloves, and protective eye shields.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A deep cooling express line storage tank oil stain treatment method is characterized by comprising the following steps:
step one, preheating a heating device to a set temperature;
vaporizing the liquid nitrogen to obtain nitrogen and filtering;
step three, introducing the filtered nitrogen into the heating device preheated in the step one for heating;
step four, the heated nitrogen is communicated to a liquid phase inlet of a deep cooling express line storage tank through a pipeline;
opening a liquid phase inlet of the cryogenic express line storage tank to enable nitrogen to enter the cryogenic express line storage tank, closing the liquid phase inlet of the cryogenic express line storage tank when the pressure of the nitrogen in the cryogenic express line storage tank is greater than 0.3MPa, and simultaneously opening a gas phase outlet and a discharge port of the cryogenic express line storage tank for purging;
step six, when the pressure of nitrogen in the cryogenic express line storage tank is reduced to be less than 0.05MPa, closing a gas phase outlet and a discharge port of the cryogenic express line storage tank;
step seven, repeating the step five and the step six for 2 times;
step eight, keeping the nitrogen at the liquid phase inlet of the cryogenic express line storage tank to be introduced, opening the gas phase outlet of the cryogenic express line storage tank, keeping the liquid phase inlet of the cryogenic express line storage tank to be opened after the nitrogen pressure in the cryogenic express line storage tank is kept at 0.3MPa, continuously keeping the nitrogen pressure in the cryogenic express line storage tank at 0.3MPa, and continuously purging;
step nine, after the purging in the step eight is completed, the nitrogen pressure in the cryogenic fast line storage tank is vented to 0.05MPa, the gas phase outlet and the liquid phase inlet are closed, the heating device is stopped from heating, and the oil stain treatment of the cryogenic fast line storage tank is finished;
the liquid phase import of cryrogenic fast line storage tank is provided with liquid phase import valve, the gaseous phase export of cryrogenic fast line storage tank is provided with gaseous phase gas outlet valve, the discharge port of cryrogenic fast line storage tank is provided with the discharge valve.
2. The method for treating the oil stain on the cryogenic fast line storage tank according to claim 1, characterized by comprising the following steps: and selecting a heating column as the heating device in the first step, wherein a nitrogen inlet valve is arranged at an inlet of the heating column.
3. The method for treating the oil stain on the cryogenic fast line storage tank according to claim 1, characterized by comprising the following steps: the set temperature of the heating device in the first step is 105 ℃.
4. The method for treating the oil stain on the cryogenic fast line storage tank according to claim 1, characterized by comprising the following steps: and in the second step, an air-temperature vaporizer is selected to vaporize the liquid nitrogen, and a 0.01 micron filter is selected to filter the nitrogen.
5. The method for treating the oil stain on the cryogenic fast line storage tank according to claim 1, characterized by comprising the following steps: in the eighth step, when the storage tank of the deep cooling express line is 1m3Or 3m3When the fast line storage tank is deeply cooled, the continuous purging time is 3 hours; when the deep cooling express line storage tank is 5m3When the fast line storage tank is deeply cooled, the continuous purging time is 5 hours.
6. The utility model provides a cryrogenic fast line storage tank greasy dirt processing apparatus which characterized in that: the method for treating the oil stain of the cryogenic fast line storage tank according to any one of claims 1 to 5, which comprises an air-temperature vaporizer, a filter, a heating column and the cryogenic fast line storage tank;
liquid nitrogen is introduced into a feeding hole of the air-temperature vaporizer, a discharging hole of the air-temperature vaporizer is connected to a feeding hole of a filter through a pipeline, a discharging hole of the filter is connected to an inlet of a heating column through a pipeline, an outlet of the heating column is connected to a liquid phase inlet of a deep-cooling fast line storage tank through a pipeline, and a gas phase outlet and a discharging hole are further formed in the deep-cooling fast line storage tank;
the inlet of the heating column is provided with a nitrogen gas inlet valve, the liquid phase inlet is provided with a liquid phase inlet valve, the gas phase outlet is provided with a gas phase gas outlet valve, and the discharge port is provided with a discharge valve.
7. The deep cooling express line storage tank oil stain treatment device according to claim 6, characterized in that: the filter is a 0.01 micron filter.
8. The deep cooling express line storage tank oil stain treatment device according to claim 6, characterized in that: the outer wall of the heating column is sleeved with a heat insulation sleeve.
9. The deep cooling express line storage tank oil stain treatment device according to claim 6, characterized in that: the deep cooling express line storage tank is 1m in length3、3m3Or 5m3The cryogenic fast line storage tank.
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| CN201910975784.2A CN110711752B (en) | 2019-10-15 | 2019-10-15 | Deep cooling fast line storage tank oil stain treatment method and device |
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| CN201910975784.2A CN110711752B (en) | 2019-10-15 | 2019-10-15 | Deep cooling fast line storage tank oil stain treatment method and device |
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| CN110711752B true CN110711752B (en) | 2021-08-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0686960A (en) * | 1992-07-08 | 1994-03-29 | Kanken Techno Kk | Cleaning apparatus |
| ATE181971T1 (en) * | 1993-11-11 | 1999-07-15 | Daido Steel Co Ltd | DEVICE FOR REMOVING OIL FROM REWIND TUBES |
| CN104001702B (en) * | 2014-05-22 | 2016-05-18 | 北京石油化工学院 | Gas station's sunken tankers mechanical cleaning system |
| CN104353651A (en) * | 2014-08-19 | 2015-02-18 | 中国科学院广州地球化学研究所 | Atmosphere sampling tank cleaning system and cleaning method |
| CN205316035U (en) * | 2015-12-31 | 2016-06-15 | 杰瑞石油天然气工程有限公司 | Empty nitrogen station cold energy comprehensive recovery utilization system |
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Address after: 215152 Anmin Road, Panyang Industrial Park, Huangdai Town, Xiangcheng District, Suzhou City, Jiangsu Province Patentee after: Jinhong Gas Co.,Ltd. Address before: 215152 No. 6 Anmin Road, Panyang Industrial Park, Huangdi Town, Xiangcheng District, Suzhou City, Jiangsu Province Patentee before: SUZHOU JINHONG GAS Co.,Ltd. |
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