CN114408397A - Tank cleaning method - Google Patents
Tank cleaning method Download PDFInfo
- Publication number
- CN114408397A CN114408397A CN202111527891.2A CN202111527891A CN114408397A CN 114408397 A CN114408397 A CN 114408397A CN 202111527891 A CN202111527891 A CN 202111527891A CN 114408397 A CN114408397 A CN 114408397A
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- CN
- China
- Prior art keywords
- tank
- cleaning
- wall
- solvent
- spraying
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/0093—Devices for cleaning the internal surfaces of the container and forming part of the container
-
- 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
-
- 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
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a tank cleaning method, which comprises the following steps: heating the inner wall of the tank; spraying a solvent on the heated inner wall; and cleaning the inner cavity of the tank until the cleaning is finished. The tank cleaning method can solve the problem of difficulty in asphalt cleaning.
Description
Technical Field
The invention relates to the technical field of cleaning, in particular to a tank cleaning method.
Background
An International Standard TANK (ISO TANK) is a stainless steel pressure vessel installed in a fastening outer frame, and a TANK body inner container is mostly made of 316 stainless steel. Most tanks have steam or electric heating means, inert gas shielding, pressure reduction and other optional equipment for fluid transport and handling. The periphery of the tank body is provided with a corner bearing frame which plays roles in protection and hoisting. The outer frame dimensions of the tank are exactly the same as the dimensions of an international standard 20 foot container (20 feet long, 8 feet wide, 8 feet high, 6 inches). Can be used for road, railway and water transportation.
ISO TANK will be used for shipping asphalt, and the TANKs need to be cleaned after shipping is completed. However, asphalt is insoluble in water and thus is difficult to clean.
Disclosure of Invention
In view of this, the embodiment of the invention is expected to provide a tank cleaning method, which can solve the problem of difficulty in asphalt cleaning.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
the embodiment of the invention provides a tank cleaning method, which comprises the following steps:
heating the inner wall of the tank;
spraying a solvent on the heated inner wall;
and cleaning the inner cavity of the tank until the cleaning is finished.
In the above-mentioned scheme, with the inner wall of tank heating, include:
and heating the inner wall of the tank to 45-80 ℃ and maintaining for 1-4 hours.
In the above-mentioned scheme, with the inner wall of tank heating, include:
and introducing steam into the coil pipe of the tank, and conducting heat to the inner wall of the tank through the coil pipe.
In the above aspect, before spraying the solvent on the heated inner wall, the cleaning method includes:
mixing heavy aromatic hydrocarbon mixed oil, an alcohol ether solvent and an acetate solvent according to the following weight percentage to form the solvent:
heavy aromatic hydrocarbon mixed oil: 30 to 65 percent;
alcohol ether solvent: 1 to 5 percent;
acetate solvent: 5 to 35 percent.
In the above scheme, spraying the solvent on the inner wall after the heating is completed comprises:
spraying the solvent to the heated inner wall by a pneumatic spray gun.
In the above scheme, after the solvent is sprayed on the heated inner wall and before the inner cavity of the tank is cleaned, the cleaning method includes:
and discharging the waste liquid in the tank.
In the above scheme, before the heating of the inner wall of the tank, the method includes:
an electrostatic ground is electrically connected to an electrostatic ground of the tank.
In the above-mentioned scheme, wash the inner chamber of tank, include:
spraying at least three cleaning liquids into the tank successively by using a spray head with preset pressure, and respectively continuing for preset time; the three cleaning liquids include water at a first preset temperature, detergent and water at a second preset temperature.
In the above-mentioned scheme, wash the inner chamber of tank, include:
and (3) putting cleaning equipment or part of the cleaning equipment into the tank box from a manhole at the top of the tank box, and cleaning the tank box until the cleaning is finished.
In the above scheme, the ratio of the duration time of the water spraying at the first preset temperature, the detergent and the water spraying at the second preset temperature is 1:2: 1.
In the above scheme, after the inner cavity of the tank is cleaned, the cleaning method includes:
and drying the inner cavity of the tank.
In the above-mentioned scheme, to carry out drying process to the tank inner chamber, include:
and carrying out forced ventilation on the tank.
According to the cleaning method of the tank, the inner wall of the tank is heated, the heated inner wall is sprayed with the solvent, and finally the tank is cleaned, so that asphalt can be better dissolved, and the problem that the asphalt is difficult to clean is solved.
Other beneficial effects of the embodiments of the present invention will be further described in conjunction with the specific technical solutions in the detailed description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below. It should be understood that the drawings described below are only a part of the drawings of the embodiments of the present invention, and that other drawings may be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic flow chart of a tank cleaning method according to an embodiment of the present invention;
FIG. 2 is a detailed flow chart of a tank cleaning method according to an embodiment of the present invention.
Detailed Description
Aiming at the problems in the prior art, the embodiment of the invention provides a tank cleaning method, which comprises the following steps:
heating the inner wall of the tank;
spraying a solvent on the heated inner wall;
and cleaning the inner cavity of the tank until the cleaning is finished.
According to the cleaning method of the tank, the inner wall of the tank is heated, the heated inner wall is sprayed with the solvent, and finally the tank is cleaned, so that asphalt can be better dissolved, and the problem that the asphalt is difficult to clean is solved.
The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Also, the embodiments described below 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 these embodiments without inventive step, are within the scope of protection of the present invention.
The embodiment provides a tank cleaning method, as shown in fig. 1, the tank cleaning method includes:
step 101: heating the inner wall of the tank;
step 102: spraying a solvent on the heated inner wall;
step 103: and cleaning the inner cavity of the tank until the cleaning is finished.
Here, the TANK is exemplarily ISO TANK, and it is understood that other TANK is possible.
Here, for example, in step 101, the purpose of heating the inner wall of the tank is to:
1) the asphalt is heated and softened, and part of the asphalt falls off from the inner wall;
2) allowing the solvent in step 102 to function better.
Here, the solvent is used for dissolving the asphalt, exemplarily. It will be appreciated that if other goods are being shipped in the tank, a solvent that dissolves the other goods may be used. Illustratively, the viscosity of the solvent needs to be greater than a certain value so that the solvent can adhere to the inner wall for more time, better dissolving the bitumen.
According to an alternative embodiment of the present invention, in step 101, the heating the inner wall of the tank includes:
and heating the inner wall of the tank to 45-80 ℃ and maintaining for 1-4 hours.
Thus, the pitch is, illustratively, more likely to fall off the inner wall. The temperature of 45-80 ℃ makes the activity of the solvent better. The temperature of the inner wall of the tank is heated to 45-80 degrees, which may be 45 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, etc., and maintained for 1-4 hours, which may be 1 hour, 2 hours, 3 hours, 4 hours, etc.
According to an alternative embodiment of the present invention, in step 101, the heating the inner wall of the tank includes:
and introducing steam into the coil pipe of the tank, and conducting heat to the inner wall of the tank through the coil pipe.
Here, for example, since the coil is disposed between the inner wall and the outer wall of the tank, it is convenient to heat the inner wall by introducing steam into the coil. Also, since the temperature of the steam is much higher than 100 degrees, the heating efficiency is relatively high. For example, the tank may be provided with a temperature sensor monitoring the temperature of the inner wall in order to accurately control the temperature of the heating. The steam can is also called as a steam can because the steam is used for heating.
According to an alternative embodiment of the present invention, before the spraying of the solvent on the heated inner wall, the cleaning method includes:
mixing heavy aromatic hydrocarbon mixed oil, an alcohol ether solvent and an acetate solvent according to the following weight percentage to form the solvent:
heavy aromatic hydrocarbon mixed oil: 30-65%, e.g., 30%, 40%, 50%, 60%, 65%, etc.;
alcohol ether solvent: 1-5%, e.g., 1%, 2%, 3%, 4%, 5%, etc.;
acetate solvent: 5-35%, e.g., 5%, 10%, 20%, 30%, 35%.
The solvent mixed by the components has strong dissolving capacity and is relatively environment-friendly. Illustratively, the above solvents are also called diluents. Among them, the acetate solvent is also called as an acetate environment-friendly solvent.
In practice, for better results, the following weight percentages are often mixed:
heavy aromatic hydrocarbon mixed oil: 60-65%, such as 60%, 61%, 62%, 63%, 64%, 65%, etc.;
alcohol ether solvent: 1 to 5 percent. 1%, 2%, 3%, 4%, 5%;
acetate solvent: 30-35%, 30%, 31%, 32%, 33%, 34%, 35%, etc.
The solvent prepared according to the proportion can reach or exceed the solvent prepared according to the proportion in effect.
According to an alternative embodiment of the present invention, in step 102, the spraying a solvent on the heated inner wall includes:
spraying the solvent to the heated inner wall by a pneumatic spray gun.
Thus, for example, with the pneumatic lance, the solvent can be spread over the inner wall of the tank by means of a greater spraying distance of the pneumatic lance. Illustratively, the pneumatic lance is provided with a pneumatic pump. For example, the tank and the ancillary facilities may carry combustible gases and the like due to the shipment of goods. Therefore, the shell of the pneumatic pump can be grounded, namely, the shell is electrically connected with an electrostatic grounding wire, so that the risk of the tank and other facilities caused by the generated static is avoided.
According to an optional embodiment of the invention, after the spraying of the solvent on the heated inner wall and before the cleaning of the inner cavity of the tank, the cleaning method comprises:
and discharging the waste liquid in the tank.
Here, the waste liquid is formed by dissolving asphalt by a solvent, for example. Before cleaning, waste liquid is discharged, so that the cleaning is cleaner. The discharge is performed through a drain valve at the bottom of the tank.
According to an alternative embodiment of the invention, before said heating the inner wall of the tank, the method comprises:
an electrostatic ground is electrically connected to an electrostatic ground of the tank.
For example, since the tank may carry flammable gas or the like due to shipment of goods, the electrostatic earth wire is electrically connected to the electrostatic earth point of the tank, preventing the tank from electrostatically igniting the flammable gas.
According to an alternative embodiment of the invention, the cleaning of the inner cavity of the tank comprises:
spraying at least three cleaning liquids into the tank successively by using a spray head with preset pressure, and respectively continuing for preset time; the three cleaning liquids include water at a first preset temperature, detergent and water at a second preset temperature.
Here, the water of the first preset temperature may be hot water, the detergent may be a general detergent suitable for the kind of goods remaining in the tank, and the water of the second preset temperature may be normal temperature water, for example. Illustratively, the first preset temperature is 75-85 degrees celsius, such as 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85 degrees celsius, and the like. The water with the temperature can dissolve the asphalt, so that higher water temperature is not needed, and the cost is low. The second preset temperature is 15-25 degrees centigrade, such as 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 degrees centigrade and the like. This is water at normal temperature and is more readily available.
Here, for example, the spray head with the preset pressure may also be referred to as a high-pressure spray head. The effect of the predetermined pressure of shower nozzle lies in, can let the washing with liquid fully contact tank box's inner wall and the remaining goods on the inner wall, also can make the washing with liquid through pressure and produce the impact force, promote the separation of remaining goods and tank box inner wall.
Here, the first preset temperature of water may, for example, function as: the oil residues are dissolved, and the temperature in the tank can be increased, so that the function of the detergent can be better exerted. The water at the second preset temperature may function to remove the detergent, i.e., rinse. Illustratively, because the spray head has the preset pressure, the corresponding function of the cleaning liquid can be better played.
Here, the cleaning liquid may be used in other sequences than the above-described sequence. For example, it may be a detergent, water of a first preset temperature, water of a second preset temperature, etc.
Here, illustratively, the cleaning liquid, in addition to the three kinds described above, may be added in a larger variety as needed. However, environmental requirements are met, and the problem of whether toxic and harmful chemical reactions occur among various cleaning liquids is also considered.
According to an alternative embodiment of the invention, the ratio of the duration of the water jets of said first preset temperature, of said detergent and of said second preset temperature is 1:2: 1.
This is a proportion of the greater cleanliness that can be achieved with most goods. It will be appreciated that the above proportions may also be adjusted for specific cargo types. Here, the duration is also longest, exemplarily, since the detergent is mainly responsible during the washing process. It will be appreciated that the duration of the three cleaning liquids may be adjusted to the particular situation. It will also be appreciated that the order of use of the three cleaning liquids may be adjusted to the particular circumstances.
According to an alternative embodiment of the present invention, in step 103, the cleaning the inner cavity of the tank includes:
and (3) putting cleaning equipment or part of the cleaning equipment into the tank box from a manhole at the top of the tank box, and cleaning the tank box until the cleaning is finished.
Here, the top manhole refers to an open hole structure for a person to enter and exit the TANK in ISO TANK, for example, in order to perform installation, inspection, and safety inspection.
Here, the cleaning is exemplarily performed by a cleaning apparatus, which is generally attached with at least one cleaning head or cleaning gun having various functions, which can be entered into a tank to be cleaned as needed and automatically cleaned according to the setting of a program in the cleaning apparatus.
Here, for example, if the cleaning device is a small intelligent cleaning device like a sweeping robot, the whole cleaning device can enter the tank for cleaning.
According to an alternative embodiment of the invention, after said cleaning of the internal cavity of the tank, the cleaning method comprises:
and drying the inner cavity of the tank.
Like this, can avoid the tank inner chamber to breed mould etc. because of the humidity, also can transport the goods of next time sooner.
According to an optional embodiment of the invention, the drying treatment of the tank inner cavity comprises:
and carrying out forced ventilation on the tank.
Here, the purpose of forced-air cooling of the tank is, for example, to remove steam and water vapor from the tank interior in order to dry the tank interior more quickly.
For a better understanding of the present invention, a detailed flow of a method for cleaning a tank according to an embodiment of the present invention is described below, as shown in fig. 2, the method including:
step 201: and (5) preparing a solvent. Mixing the heavy aromatic hydrocarbon mixed oil, the alcohol ether solvent and the acetate solvent according to a specified ratio to form the solvent, wherein the mixing ratio is referred to above.
Step 202: an electrostatic ground is provided. The electrostatic earth wire may be electrically connected to the electrostatic earth point of the tank, and a device such as an air pump may also be electrically connected to the electrostatic earth wire.
Step 203: steam preheating. And introducing steam into the coil pipe of the tank, conducting heat to the inner wall of the tank through the coil pipe, and heating the inner wall of the tank, wherein the heating temperature and the heating time are referred to above.
Step 204: spraying the solvent. Spraying the solvent to the heated inner wall by a pneumatic spray gun. The pneumatic spray gun is provided with a pneumatic pump, and the shell of the pneumatic pump can be grounded, namely, the shell is electrically connected with a static grounding wire, so that static electricity is prevented from being generated, and risks are brought to a tank and other facilities.
Step 205: and discharging the waste liquid. The waste liquid is formed after asphalt is dissolved by a solvent, and the discharge is carried out through a liquid discharge valve at the bottom of the tank.
Step 206: and (5) cleaning. Hot water, detergent and normal temperature water are sprayed into the tank successively by a high pressure spray head.
And/or putting the cleaning equipment or part of the cleaning equipment into the tank from a manhole at the top of the tank, and cleaning the tank until the cleaning is finished.
Step 207: and (5) drying. And (4) carrying out forced ventilation on the tank, and removing steam and water vapor in the inner cavity of the tank so as to dry the interior of the tank as soon as possible.
Step 208: and (5) finishing cleaning.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the description of the embodiments of the present invention, the term "connected" should be interpreted broadly unless otherwise indicated and limited. For example, the two elements may be electrically connected, or may be connected through an intermediate member, directly or indirectly. The specific meaning of the above terms can be understood by those of ordinary skill in the art as appropriate.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the embodiments of the present invention, if the terms "first \ second \ third" are used, they are only used to distinguish similar objects, and do not represent a specific ordering for the objects. It is to be understood that the terms first, second, and third, where permissible, are interchangeable in particular order or sequences.
The individual features described in the embodiments can be combined in any suitable manner without departing from the scope, for example different embodiments and aspects can be formed by combining different features. In order to avoid unnecessary repetition, various possible combinations of the specific features of the invention will not be described further.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (12)
1. A method of cleaning a tank, the method comprising:
heating the inner wall of the tank;
spraying a solvent on the heated inner wall;
and cleaning the inner cavity of the tank until the cleaning is finished.
2. The method of cleaning a tank of claim 1, wherein heating the inner wall of the tank comprises:
and heating the inner wall of the tank to 45-80 ℃ and maintaining for 1-4 hours.
3. The method of cleaning a tank of claim 1, wherein heating the inner wall of the tank comprises:
and introducing steam into the coil pipe of the tank, and conducting heat to the inner wall of the tank through the coil pipe.
4. A method of cleaning a tank according to claim 1, wherein before the spraying of the solvent on the heated inner wall, the method of cleaning comprises:
mixing heavy aromatic hydrocarbon mixed oil, an alcohol ether solvent and an acetate solvent according to the following weight percentage to form the solvent:
heavy aromatic hydrocarbon mixed oil: 30 to 65 percent;
alcohol ether solvent: 1 to 5 percent;
acetate solvent: 5 to 35 percent.
5. The method of cleaning a tank of claim 1, wherein the spraying of the solvent on the heated inner wall comprises:
spraying the solvent to the heated inner wall by a pneumatic spray gun.
6. The tank cleaning method according to claim 1, wherein after the solvent is sprayed on the heated inner wall and before the tank inner cavity is cleaned, the tank cleaning method comprises:
and discharging the waste liquid in the tank.
7. A method of cleaning a tank according to claim 1, wherein prior to said heating the inner walls of the tank, the method comprises:
an electrostatic ground is electrically connected to an electrostatic ground of the tank.
8. The method of cleaning a tank of claim 7, wherein the cleaning the interior chamber of the tank comprises:
spraying at least three cleaning liquids into the tank successively by using a spray head with preset pressure, and respectively continuing for preset time; the three cleaning liquids include water at a first preset temperature, detergent and water at a second preset temperature.
9. The method of cleaning a tank of claim 7, wherein the cleaning the interior chamber of the tank comprises:
and (3) putting cleaning equipment or part of the cleaning equipment into the tank box from a manhole at the top of the tank box, and cleaning the tank box until the cleaning is finished.
10. The tank cleaning method according to claim 8, wherein the ratio of the duration of the water injection of the first preset temperature, the detergent and the water injection of the second preset temperature is 1:2: 1.
11. A method of cleaning a tank as claimed in claim 9, wherein after the cleaning of the interior of the tank, the method comprises:
and drying the inner cavity of the tank.
12. The method of cleaning a tank of claim 11, wherein the drying the tank interior comprises:
and carrying out forced ventilation on the tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111527891.2A CN114408397A (en) | 2021-12-14 | 2021-12-14 | Tank cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111527891.2A CN114408397A (en) | 2021-12-14 | 2021-12-14 | Tank cleaning method |
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| Publication Number | Publication Date |
|---|---|
| CN114408397A true CN114408397A (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111527891.2A Pending CN114408397A (en) | 2021-12-14 | 2021-12-14 | Tank cleaning method |
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| US4341232A (en) * | 1979-10-03 | 1982-07-27 | Beaumont (U.K.) Limited | Tank cleaning apparatus |
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