CN111017427A - Zero-leakage storage tank and zero-leakage method for volatile organic liquid and gas station - Google Patents
Zero-leakage storage tank and zero-leakage method for volatile organic liquid and gas station Download PDFInfo
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- CN111017427A CN111017427A CN201911423567.9A CN201911423567A CN111017427A CN 111017427 A CN111017427 A CN 111017427A CN 201911423567 A CN201911423567 A CN 201911423567A CN 111017427 A CN111017427 A CN 111017427A
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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
- B65D90/22—Safety features
- B65D90/28—Means for preventing or minimising the escape of vapours
-
- 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
- B65D88/00—Large containers
- B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
- B65D88/42—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides a zero leakage storage tank and zero leakage method that volatile organic liquid and filling station used, includes by the tank bottoms, integrated formation is in tank wall on the tank bottoms and integrated formation are in the storage tank that the tank deck of jar wall upper end mouth constitutes, tank deck upper end is formed with the manhole, the lower part of tank wall one side is provided with at least one feed inlet and at least one discharge gate, the tank wall in be provided with and be used for covering the bag diaphragm on the liquid level of the liquid material that contains volatile organic gas, the bag diaphragm rises and descends along with the liquid level together, the bag diaphragm is fixed in the department of being connected of tank wall and tank deck through jar wall seal fixing spare all around, or the bag diaphragm is fixed in the up end mouth department of manhole through manhole seal fixing spare all around. The invention can normally complete material sending and receiving (large breathing) of the storage tank under the condition of constantly keeping zero leakage of volatile gas and overcome the problem that the liquid level changes (small breathing) due to the volume change of liquid materials caused by temperature change.
Description
Technical Field
The invention relates to a liquid material storage tank. In particular to a zero-leakage storage tank and a zero-leakage method for volatile organic liquid and a gas station.
Background
At present, the existing liquid material storage tanks are all hard shells, and after materials are filled in the storage tanks, the storage tanks are sealed through hard covers. And, liquid level and gas space inside after the material is equipped with are all certain, when sending out the material or receiving the material (big breathing), or when temperature variation liquid material receives thermal expansion, meets cold contraction, causes the volume change of liquid material to make the liquid level change (little breathing), because the storage tank is the stereoplasm casing, the volume can not change, must to the gaseous VOCs of volatile organic compounds of atmospheric loss. Therefore, the environment is easily polluted, fire and explosion accidents are easily caused, or the surrounding environment and human bodies are easily damaged, and meanwhile, the material is wasted.
The liquid material storage tank of the prior fixed-roof storage tank structure shown in fig. 1 comprises: a tank wall 2 integrally connected to the upper surface of the tank bottom 1, a manhole 11 for light input and maintenance convenience formed at the upper end of the tank wall 2 and sealed by a blind plate 14, and various valves and phase pipes 12, etc. The lower side of the tank wall 2 is provided with a discharge port and a feed port, and the storage tank is internally provided with a liquid material 5. As shown in fig. 2 and 3, in order to prevent leakage of the liquid material 5, a tank floating roof 7 capable of ascending and descending with the liquid surface 6 is provided on the liquid surface 6 of the liquid material 5, and a first-stage seal 3 and a second-stage seal 4 capable of ascending and descending with the liquid surface 6 and the tank floating roof 7 are provided between the tank floating roof 7 and the tank wall 2. The existing volatile organic liquid material storage tank or the storage tank for a gas station has the following defects:
1. a gas phase space exists above the liquid level of the material in the storage tank, and the volatile organic gas in the gas phase space is discharged to the atmosphere when the liquid level rises; the pressure in the gas phase space is reduced under the liquid level, so that the volatile organic gas in the liquid material is promoted to be rapidly volatilized, and simultaneously, air and oxygen in the atmosphere are sucked into the storage tank, and the risks of explosion and combustion are increased. And when air is sucked, water and a plurality of impurities are sucked simultaneously, so that the quality of the material is influenced.
2. Although the floating roof edge of the floating roof tank and the inner wall of the storage tank adopt secondary sealing, wall hanging leakage, floating roof gap leakage, structural leakage and the like can also occur.
The requirement of the 3-stage sealing on the inner wall of the storage tank is strict, such as: large convex and concave parts are not allowed, rusty spots cannot be too large and too much, ovality of the inner wall of the storage tank cannot be too large, straightness of the bus bar is high, and the like.
4. Consuming nitrogen, electric energy and other resources.
5. Accidents easily occur due to misoperation, such as: blowing or sucking the tank to collapse, or "lifting" or "jamming" accidents.
6. The collected volatile organic gases must be burned by investing in burning equipment, and the capital investment is increased.
7. Because the collected volatile organic gases are expensive and are polluted by impurities of other components, the volatile organic gases can only be incinerated, which not only causes resource waste, but also generates carbon dioxide and increases greenhouse gas emission.
8. Almost all volatile organic gases are characterized by inflammability, explosiveness, toxicity, harmfulness, pungent peculiar smell, difficulty in degradation and haze generation, and are harmless and not beneficial as long as the volatile organic gases are discharged into the atmosphere.
Disclosure of Invention
The invention aims to solve the technical problem of providing a volatile organic liquid which can overcome the problem that volatile organic gas is discharged to the atmosphere due to the volume change of liquid materials caused by the volume change of the liquid materials (large breath) and temperature change (small breath) when the storage tank receives and delivers materials, and a zero-leakage storage tank and a zero-leakage method for a gas station.
The technical scheme adopted by the invention is as follows: the utility model provides a zero leakage storage tank that volatile organic liquid and filling station used, includes by the tank bottoms, integrated formation be in tank wall on the tank bottoms and integrated formation are in the storage tank that the tank deck of jar wall upper end mouth constitutes, tank deck upper end is formed with the manhole, the lower part of tank wall one side is provided with at least one feed inlet and at least one discharge gate, the tank wall in be provided with and be used for covering the bag diaphragm on the liquid level of the liquid material that contains volatile organic gas, the bag diaphragm rises and descends along with the liquid level together, the bag diaphragm is fixed in the junction of tank wall and tank deck through jar wall seal fixing spare all around, or the bag diaphragm is fixed in the upper end mouth department of manhole through manhole seal fixing spare all around.
The bag type diaphragm comprises: the bottom surface of the bag-type diaphragm is used for covering the liquid level, and the side surface of the bag-type diaphragm is integrally formed at the periphery of the bottom surface of the bag-type diaphragm, wherein the bottom surface of the bag-type diaphragm ascends and descends along with the liquid level, and the periphery of the side surface of the bag-type diaphragm is fixed at the connecting point of the tank wall and the tank top through a sealing fixing piece and contracts or expands along with the ascending and descending of the liquid level.
The area of the bottom surface of the bag-type diaphragm is larger than the cross sectional area of the tank wall, and the extending height of the side surface of the bag-type diaphragm is larger than the height of the tank wall.
The liquid level is provided with a storage tank floating roof, a first-stage seal and a second-stage seal which can ascend and descend along with the storage tank floating roof are arranged between the periphery of the storage tank floating roof and the tank wall, the bottom surface of the bag-type diaphragm is positioned on the top end surface of the storage tank floating roof, and the side surface of the bag-type diaphragm is positioned on the second-stage seal.
The bottom surface of the bag type diaphragm, which covers the liquid level, of the bag type diaphragm is provided with a plurality of through pipes which are communicated with liquid materials in the storage tank and are respectively used for feeding, discharging, sampling, deflating and dosing, one end, far away from the bottom surface of the bag type diaphragm, of each through pipe penetrates through the manhole and is positioned outside the storage tank, and each through pipe is provided with a one-way valve.
The bottom of the bottom surface of the bag-type diaphragm is integrally provided with a solid weight, and the through pipe penetrates through the solid weight and is communicated with the liquid material in the storage tank.
The bottom surface of the bag-type diaphragm is also provided with a layer of liquid weight, and the through pipe sequentially penetrates through the liquid weight, the bottom surface of the bag-type diaphragm and the solid weight and is communicated with liquid materials in the storage tank.
The liquid weight enables the outer peripheral surface of the side wall of the diaphragm close to the bottom surface of the bag-type diaphragm to be in sealing contact with the inner peripheral surface of the tank wall, and the diameter of the liquid weight is larger than that of the solid weight.
An exhaust pipe is arranged at the position, located at the manhole, of the side face of the bag-type diaphragm, an exhaust check valve is arranged at one end, located at the side face of the bag-type diaphragm, of the exhaust pipe, and one end, located at the side face of the diaphragm, of the exhaust pipe is communicated with a space between the side face of the bag-type diaphragm and the tank wall.
A zero-leakage method for a zero-leakage storage tank for volatile organic liquids and gas stations uses a soft and loose bag-type diaphragm to change the space of liquid materials in a liquid storage tank into a closed space, the closed space can change along with the volume of the liquid materials, the seals between the bag-type diaphragm and the inner wall of the storage tank, the periphery of a manhole and a floating roof are static seals, the storage tank normally finishes sending and receiving materials under the condition of zero leakage of volatile organic gases constantly, and the liquid level changes due to the volume change of the liquid materials caused by the temperature change, thereby avoiding the volatile organic gases from escaping into the atmosphere.
The zero-leakage storage tank and the zero-leakage method for the volatile organic liquid and the gas station can normally finish material sending and receiving (large breathing) under the condition of constantly keeping zero leakage of volatile gas and overcome the problem that the liquid level changes (small breathing) due to the volume change of liquid materials caused by temperature change. The invention can be used for open liquid level of train transport tanks, oil tanker transport tanks, automobile transport tanks, internal combustion engine oil tanks, automobile oil tanks, ship oil tanks, aircraft oil tanks, diesel engine oil tanks, sewage pools and the like.
The invention has the following advantages:
1. the liquid level of the volatile liquid material rises no matter the feeding (oil recovery) or the temperature rises in the storage tank; the liquid level of the volatile liquid material is lowered due to discharging (oil distribution) or temperature reduction, namely large breath and small breath, and the volatile gas cannot leak.
2. The inner wall of the storage tank has no requirements on the smoothness, cylindricity, concavity and convexity, scratch and rust spots, and even can meet the requirements of the storage tank with the corrugated cylinder.
3. Even if the liquid level of the liquid material descends, the wall hanging phenomenon can also keep zero leakage of the volatile gas.
4. The static seal has reliable performance, long service life and simple structure compared with the dynamic seal.
5. Evaporation losses are avoided due to the elimination of the gas phase space of the volatile organic compounds.
6. Ensuring safe production and eliminating explosion and fire.
7. The volatile gas is eliminated and is directly discharged to the atmosphere because the phase tube has small inner diameter, long length and more turns and is not discharged.
7. Avoid mixing of volatile gases and impurities of various components.
9. The volatile gas discharged from the exhaust pipe has the same components as the liquid material, has no air, oxygen and other impurities, and can be directly recycled to the original storage tank under the condition of not analyzing the component content.
10. Simplify storage tank configuration and recovery processing device, practice thrift the spending.
11. The tank will never be "blown" or "deflated".
12. The bottom surface of the bag-type diaphragm can be fixed with a plurality of weights, the weights of the weights can be adjusted according to needs, the volatile liquid material is pressed by gravity, the pressure is increased, the volatile liquid material is restrained from converting towards a gas phase, and meanwhile, the phenomenon of 'gas lift' can be avoided.
13. Clean and harmless liquid can be used as a weight, so that the membrane body is tightly attached to the inner wall of the storage tank to enhance the sealing effect.
14. The volatile gas is sealed in the storage tank and is high-quality raw material and product, the price is not so high, the volatile gas can not pollute the environment, and the energy can be saved
15. The invention avoids the artificial interference.
16. Therefore, the method has no stink and peculiar smell, eliminates the disease inducement, improves the production environment and improves the occupational health.
17. Less material consumption and power saving.
18. Convenient modification and low cost.
Drawings
FIG. 1 is a schematic view of a prior art tank as the level of the tank drops;
FIG. 2 is a schematic diagram of a prior art tank with a rising liquid level;
FIG. 3 is a schematic view of a prior art tank having a tank floating roof disposed therein;
FIG. 4 is a schematic illustration of the zero leakage tank of the present invention as it would be used at a transport and service station;
FIG. 5 is a schematic view of the zero leakage tank of the present invention in a raised level configuration for use at transport and service stations;
FIG. 6 is a schematic view of the zero-leak tank for a transport and service station of the present invention without liquid material therein;
FIG. 7 is a schematic diagram of the construction of a bag-type diaphragm of the present invention;
FIG. 8 is a schematic view of the present invention with a tank floating roof;
FIG. 9 is a schematic structural view of the bag-type diaphragm provided with a through pipe on the bottom surface thereof;
FIG. 10 is a schematic view of the present invention in the configuration of FIG. 9, with no liquid material inside the tank;
FIG. 11 is a schematic diagram of the construction of a bag diaphragm used in the construction of FIG. 9 in accordance with the present invention;
FIG. 12 is a schematic structural view of a solid weight of the present invention;
FIG. 13 is a view of the structure of FIG. 12 with a liquid weight;
fig. 14 is a schematic view of the structure of the present invention in which an exhaust pipe is provided on the side of the bag type diaphragm.
In the drawings
1: the pot bottom 2: tank wall
3: first-stage seal 4: second stage seal
5: liquid material 6: liquid level
7: the floating roof of the storage tank is 8: bag type diaphragm side
9: tank wall sealing fixture 10: manhole sealing fixing piece
11: a manhole 12: breather valves and the like
13: the tank top 14: blind plate
15: bag-type diaphragm 16: direction of air suction
17: storage tank 18: direction of exhalation
19: liquid weight 20: solid weight
21: discharge port 22: bottom surface of bag type diaphragm
23: air intake direction 24: discharge direction of material volatile matter gas
25: through pipe 26: one-way valve
27: exhaust pipe 28: exhaust check valve
29: feed inlet
Detailed Description
The present invention will be described in detail with reference to the following embodiments and accompanying drawings.
As shown in fig. 4, 5 and 9, the zero-leakage storage tank for volatile organic liquids and gas stations of the present invention comprises a storage tank 17 consisting of a tank bottom 1, a tank wall 2 integrally formed on the tank bottom 1, and a tank top 13 integrally formed at an upper end of the tank wall 2, wherein a manhole 11 is formed at an upper end of the tank top 13, at least one inlet 29 and at least one outlet 21 are formed at a lower portion of one side of the tank wall 2, a bag-type diaphragm 15 for covering a liquid surface 6 containing a volatile organic liquid material 5 is provided in the tank wall 2, the bag-type diaphragm 15 ascends and descends along with the liquid surface 6, the periphery of the bag-type diaphragm 15 is fixed at a connection point of the tank wall 2 and the tank top 13 by a tank wall sealing fixture 9, or the periphery of the bag-type diaphragm 15 is fixed at an upper end of the manhole 11 by a manhole sealing fixture 10.
As shown in fig. 4 and 5, the bag-type diaphragm 15 includes: a bag-type diaphragm bottom surface 22 for covering the liquid surface 6 and a bag-type diaphragm side surface 8 integrally formed on the periphery of the bag-type diaphragm bottom surface 22, wherein the bag-type diaphragm bottom surface 22 ascends and descends along with the liquid surface 6, and the periphery of the bag-type diaphragm side surface 8 is fixed at the connecting point of the tank wall 2 and the tank top 13 through a sealing fixing member 9 and contracts or expands along with the ascending and descending of the liquid surface 6. The bag type diaphragm 15 adopts an integral structure, so that the existing storage tank and the storage tank of a gas station are convenient to transform, the transformation is convenient and quick, the adaptability is strong, and the transformation cost is low.
As shown in fig. 6, 7, 10 and 11, the area D of the bottom surface 22 of the bag diaphragm is larger than the cross-sectional area D1 of the tank wall 2, and the extension height H of the side surface 8 of the bag diaphragm is larger than the height H1 of the tank wall 2.
As shown in fig. 8, a tank floating roof 7 is arranged on the liquid level 6, a first-stage seal 3 and a second-stage seal 4 which can ascend and descend along with the tank floating roof 7 are arranged between the periphery of the tank floating roof 7 and the tank wall 2, the bottom surface 22 of the bag-type diaphragm is positioned on the upper end surface of the tank floating roof 7, and the side surface 8 of the bag-type diaphragm is positioned on the second-stage seal 4.
As shown in fig. 9, a plurality of through pipes 25 which are communicated with the liquid material 5 in the storage tank 17 and are respectively used for feeding, discharging, sampling, deflating and dosing are arranged on the bottom surface 22 of the bag-type diaphragm 15 covering the liquid surface 6, and one end of each through pipe 25, which is far away from the bottom surface 22 of the bag-type diaphragm, is provided with a one-way valve 26. Several through pipes 25 which are communicated with the atmosphere are arranged on the bottom surface 22 of the bag type diaphragm, a one-way valve is arranged at the outer port of the through pipe 25, and the functions of feeding, discharging, sampling, deflating, adding medicine and the like can be realized by utilizing the through pipes 25.
As shown in fig. 12, a solid weight 20 is integrally formed at the bottom of the bottom surface 22 of the bag-type diaphragm, and the through pipe 25 penetrates through the solid weight 20 and is communicated with the liquid material 5 in the storage tank 17. The internal pressure of the material can be increased by utilizing the weight to inhibit the volatilization of VOCs in the material and increase the automatic discharging capability.
As shown in fig. 13, a layer of liquid weight 19 is further disposed on the bottom surface 22 of the bag-type diaphragm, and the through pipe 25 sequentially penetrates through the liquid weight 19, the bottom surface 22 of the bag-type diaphragm and the solid weight 20 to be communicated with the liquid material 5 in the storage tank 17. The liquid weight 19 enables the outer peripheral surface of the diaphragm side wall 8 close to the bottom surface 22 of the bag-type diaphragm to be in sealing contact with the inner peripheral surface of the tank wall 2, and the diameter of the liquid weight 19 is larger than that of the solid weight 20.
As shown in fig. 14, the bag-type diaphragm side surface 8 of the bag-type diaphragm 15 is provided with an exhaust pipe 27 at the manhole 11, an end of the exhaust pipe 27 remote from the bag-type diaphragm side surface 8 is provided with an exhaust check valve 28, and an end of the exhaust pipe 27 at the diaphragm side surface 8 communicates with a space between the bag-type diaphragm side surface 8 and the tank wall 2. An exhaust pipe is arranged at the highest position of the bag-type diaphragm 15, and a check valve is arranged at the external port of the exhaust pipe, so that the exhaust is convenient at any time and is collected.
The invention relates to a zero-leakage method for a zero-leakage storage tank for volatile organic gas and gas stations, which uses a soft and loose bag type diaphragm to change a liquid material space in a liquid storage tank into a closed space, wherein the closed space can change along with the volume of the liquid material, the seals among the bag type diaphragm, the inner wall of the storage tank, the periphery of a manhole and a floating roof are static seals, the storage tank normally finishes material sending and receiving (large breathing) under the condition of zero leakage of the volatile gas constantly, and the liquid level changes (small breathing) due to the volume change of the liquid material caused by the temperature change.
The membranes used in the zero-leak tanks and zero-leak methods for volatile organic liquids and gasoline stations of the present invention must satisfy several requirements:
1. air-proof and water-proof; 2. solvent resistance and corrosion resistance; 3, high tensile strength; 4. softening; 5. no static electricity and no static spark.
Claims (10)
1. A zero-leakage storage tank for volatile organic liquid and gas stations comprises a storage tank (17) consisting of a tank bottom (1), a tank wall (2) integrally formed on the tank bottom (1) and a tank top (13) integrally formed at an upper port of the tank wall (2), wherein a manhole (11) is formed at the upper end of the tank top (13), at least one feed inlet (29) and at least one discharge outlet (21) are formed at the lower part of one side of the tank wall (2), and the zero-leakage storage tank is characterized in that a bag-type diaphragm (15) for covering the liquid level (6) of liquid materials (5) containing volatile organic gas is arranged in the tank wall (2), the bag-type diaphragm (15) rises and falls along with the liquid level (6), the periphery of the bag-type diaphragm (15) is fixed at the connecting point of the tank wall (2) and the tank top (13) through a tank wall sealing fixing piece (9), or the periphery of the bag type diaphragm (15) is fixed at the upper port of the manhole (11) through a manhole sealing and fixing piece (10).
2. A zero-leak storage tank for volatile organic liquids and petrol stations according to claim 1, characterized in that said bag-type diaphragm (15) comprises: a bag type diaphragm bottom surface (22) used for covering the liquid level (6) and a bag type diaphragm side surface (8) integrally formed at the periphery of the bag type diaphragm bottom surface (22), wherein the bag type diaphragm bottom surface (22) ascends and descends along with the liquid level (6), the periphery of the bag type diaphragm side surface (8) is fixed at the connecting point of the tank wall (2) and the tank top (13) through a sealing fixing piece (9) and contracts or expands along with the ascending and descending of the liquid level (6).
3. Zero-leakage storage tank for volatile organic liquids and petrol stations according to claim 2, characterized in that the area (D) of the bottom (22) of the bag diaphragm is greater than the cross-sectional area (D1) of the tank wall (2), and the extended height (H) of the side (8) of the bag diaphragm is greater than the height (H1) of the tank wall (2).
4. A zero-leakage tank for volatile organic liquids and filling stations according to claim 2, characterized in that a tank floating roof (7) is arranged above said liquid level (6), a first seal (3) and a second seal (4) are arranged between the periphery of said tank floating roof (7) and the tank wall (2) and can be raised and lowered with the tank floating roof (7), said bottom surface (22) of said bag-type diaphragm is located on the upper end surface of said tank floating roof (7), and said side surface (8) of said bag-type diaphragm is located on said second seal (4).
5. The zero-leakage storage tank for volatile organic liquids and gas stations as claimed in claim 1, characterized in that the bottom surface (22) of the bag membrane (15) covering the liquid surface (6) is provided with a plurality of through pipes (25) for feeding, discharging, sampling, bleeding, dosing respectively, which are connected to the liquid material (5) in the storage tank (17), wherein one end of the through pipe (25) far away from the bottom surface (22) of the bag membrane penetrates through the manhole (11) and is located outside the storage tank (17), and is provided with a one-way valve (26).
6. The zero-leakage storage tank for volatile organic liquids and gas stations as claimed in claim 5, characterized in that a solid weight (20) is integrally formed at the bottom of the bottom surface (22) of the bag-type diaphragm, and the through pipe (25) penetrates through the solid weight (20) and is communicated with the liquid material (5) in the storage tank (17).
7. The zero-leakage storage tank for volatile organic liquids and gas stations as claimed in claim 6, wherein a layer of liquid weight (19) is further disposed on the bottom surface (22) of the bag-type diaphragm, and the through pipe (25) sequentially penetrates through the liquid weight (19), the bottom surface (22) of the bag-type diaphragm and the solid weight (20) to be communicated with the liquid material (5) in the storage tank (17).
8. The zero-leakage storage tank for volatile organic liquids and filling stations according to claim 7, characterized in that the liquid weight (19) brings the outer circumferential surface of the diaphragm side wall (8) adjacent to the bottom surface (22) of the bag diaphragm into sealing contact with the inner circumferential surface of the tank wall (2), and the diameter of the liquid weight (19) is larger than the diameter of the solid weight (20).
9. Zero-leakage storage tank for volatile organic liquids and filling stations according to claim 7, characterised in that the bag diaphragm side (8) of the bag diaphragm (15) is provided with an exhaust pipe (27) at the manhole (11), that the end of the exhaust pipe (27) remote from the bag diaphragm side (8) is provided with an exhaust non-return valve (28), and that the end of the exhaust pipe (27) at the diaphragm side (8) communicates with the space between the bag diaphragm side (8) and the tank wall (2).
10. A zero leakage method for a zero leakage storage tank for volatile organic liquids and gas stations is characterized in that a soft and loose bag type diaphragm is used for changing a liquid material space in a liquid storage tank into a closed space, the closed space can change along with the volume of the liquid material, the seals among the bag type diaphragm, the inner wall of the storage tank, the periphery of a manhole and a floating roof are static seals, the storage tank normally finishes material sending and receiving under the condition of zero leakage of volatile organic gas constantly, the liquid level changes due to the volume change of the liquid material caused by temperature change, and the volatile organic gas is prevented from being dissipated into the atmosphere.
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| CN114435781A (en) * | 2020-10-31 | 2022-05-06 | 中国石油化工股份有限公司 | Gas pollutant emission reduction storage tank and storage system |
| CN115303647A (en) * | 2022-06-28 | 2022-11-08 | 山东万通石油化工集团有限公司 | Escape-proof and stagnation-eliminating structure of floating roof type storage tank |
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