CN110871968A - Method for avoiding discharge of VOCs (volatile organic compounds) - Google Patents
Method for avoiding discharge of VOCs (volatile organic compounds) Download PDFInfo
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- CN110871968A CN110871968A CN201811010692.2A CN201811010692A CN110871968A CN 110871968 A CN110871968 A CN 110871968A CN 201811010692 A CN201811010692 A CN 201811010692A CN 110871968 A CN110871968 A CN 110871968A
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- floating
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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
- 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
- B65D88/50—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle with resilient foam or stuffed seal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A method for avoiding discharge of VOCs belongs to the technical field of an inner floating roof storage tank. The method is characterized in that: the method comprises the following steps: step 1) storing a liquid raw material into a tank body (2), arranging a floating disc (5) in the tank body (2), and arranging the floating disc (5) on the surface of the liquid raw material in a floating manner; step 2) sets up the elastic sealing body at floating plate (5) upside, elastic sealing body upper end and jar body (2) upper portion sealing connection, the circumference sealing connection of elastic sealing body lower extreme and floating plate (5), forms sealed chamber (6) between elastic sealing body and jar body (2) inner wall, and the volume of sealed chamber (6) changes along with the floating plate goes up and down, and the volatile VOCs of liquid raw materials is stored in sealed chamber (6). The method for avoiding the discharge of the VOCs completely eliminates the problem of the discharge pollution of the storage tank, reduces energy consumption, and ensures that the discharge treatment of the pollutants in the storage tank meets the requirements of new standards.
Description
Technical Field
A method for avoiding discharge of VOCs belongs to the technical field of an inner floating roof storage tank.
Background
The interior floating roof storage tank of mainly adopting of current volatile liquid chemical products is stored, it is sealed that installation tongue shape is sealed between floating plate and the jar body, be the monoblock constitution, mainly rely on the elasticity tongue piece to play sealed effect with jar body sliding contact, because the jar body has the ellipticity, the straightness that hangs down is local roughness scheduling problem, the in-process of paying the material reciprocates along with the floating plate, there is a certain amount of elastic deformation under the atress effect, can produce small clearance, the material volatilizees the gas and will get into the gas phase space on the floating plate. When the storage tank receives materials, the mixed gas in the gas space is compressed along with the rise of the liquid level, the pressure is continuously raised, and when the pressure of the mixed gas in the pipe rises to the starting pressure of the breather valve, the mixed gas is discharged to the atmosphere through the breather valve; after sunrise, as the atmospheric temperature rises and the solar radiation intensity increases, the mixed gas in the gas space expands, so that the pressure of the mixed gas increases, and when the pressure in the tank reaches the tripping pressure of the breather valve, the mixed gas is discharged to the atmosphere through the breather valve. Along with the air pollution is getting worse and worse in recent years, the air quality is particularly and more severe in the generation of haze, wherein Volatile Organic Compounds (VOCs) are the main source for haze formation, so that the environment is polluted, and the economic loss is brought.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method overcomes the defects of the prior art, and provides the method for avoiding the discharge of VOCs, which can completely eliminate the problem of discharge pollution of the storage tank, and does not discharge the materials in the whole process.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for avoiding the discharge of VOCs is characterized in that: the method comprises the following steps:
step 1) storing a liquid raw material into a tank body, wherein a floating plate is arranged in the tank body and is arranged on the surface of the liquid raw material in a floating manner;
and 2) arranging an elastic sealing body on the upper side of the floating disc, wherein the upper end of the elastic sealing body is in sealing connection with the upper part of the tank body, the lower end of the elastic sealing body is in sealing connection with the circumference of the floating disc, a sealing cavity is formed between the elastic sealing body and the inner wall of the tank body, the volume of the sealing cavity is changed along with the lifting of the floating disc, and volatile VOCs of the liquid raw materials are stored in the sealing cavity.
Preferably, the floating plate in the step 1) is a circular stainless steel plate coaxially arranged with the tank body.
Preferably, the floating plate in step 1) is provided at its lower side with a floating vessel connected thereto, the floating vessel being a compartment disposed around the floating plate.
Preferably, a tongue-shaped seal is arranged between the floating disc in the step 1) or the step 2) and the inner wall of the tank body.
Preferably, the upper end of the elastic sealing body in the step 2) is connected with the inner wall of the tank body in a sealing manner through a sealing ring.
Preferably, the sealing ring is formed by bending angle steel.
Preferably, the elastic sealing body in step 2) is an elastic cylinder, and the elastic cylinder is in a bellows shape.
Preferably, the material of the elastic sealing body in the step 2) is hydrogenated butadiene-acrylonitrile rubber.
Compared with the prior art, the invention has the beneficial effects that:
1. the method for avoiding the discharge of the VOCs has the advantages that the elastic sealing body is arranged on the upper side of the floating disc, when the floating disc goes up and down, the elastic sealing body can stretch out and draw back synchronously along with the floating disc, volatile gas overflowing from the position between the floating disc and the inner wall of the tank body can enter the position between the elastic sealing body and the inner wall of the tank body, the whole process of collecting and paying materials is closed, no external discharge is realized, the problem of discharge pollution of the storage tank is completely eliminated, the energy consumption is reduced, the pollution discharge of the storage tank is controlled to meet the new standard requirement, the physical and mental health of workers is avoided to be damaged, the inner floating roof storage tank without the discharge of the VOCs has less investment, the energy consumption is low, the operation of personnel and no waste discharge are needed.
2. The floating disc is a stainless steel plate, has high strength, can avoid the corrosion to pollute materials in the storage tank, and is convenient to be connected with the elastic sealing body in a sealing manner.
3. The floating pontoon can adjust the balance between the gravity and the buoyancy of the floating plate, and ensure that the floating plate always floats on the material liquid level.
4. The tongue shape is sealed can seal between floating plate and the internal wall of jar, avoids the material to spill over, can also guarantee that the floating plate goes up and down along with the internal liquid level synchronization of jar.
5. The sealing ring facilitates the sealing connection between the upper end of the elastic sealing body and the tank body, is formed by bending angle steel, has high strength and is conveniently connected with the inner wall of the tank body and the elastic ring in a sealing manner.
6. The elastic tube is in a corrugated tube shape, so that the elastic tube is good in elasticity and can stretch out and draw back better along with the lifting of the floating disc, the lifting of the floating disc cannot be obstructed, and the problem that the elastic tube is damaged due to the fact that the pressure in the sealing cavity changes too much can be avoided.
7. The elastic sealing body is made of hydrogenated nitrile rubber, has good elasticity, and can avoid pollution to materials in the storage tank.
Drawings
Fig. 1 is a schematic diagram of a front view of an inner floating roof tank without discharge of VOCs.
In the figure: 1. the tank bottom 2, the tank body 3, the tank top 4, the tongue-shaped seal 5, the floating plate 6, the seal cavity 7, the elastic cylinder 8, the seal ring 9, the foam inlet 10 and the breather valve.
Detailed Description
Fig. 1 shows a preferred embodiment of the present invention, which is further described below with reference to fig. 1.
As shown in fig. 1: the interior floating roof storage tank that no VOCs discharged includes jar body 2 and slides and set up the floating plate 5 in jar body 2, and the upper portion of jar body 2 is provided with foam entry 9, is provided with elastic cylinder 7 in jar body 2, and elastic cylinder 7 sets up between floating plate 5 and foam entry 9, the upper end and the 2 inner wall sealing connection of jar body of elastic cylinder 7, the lower part and the 5 sealing connection of floating plate of elastic cylinder 7 to form and sealed chamber 6 between elastic cylinder 7 and jar body 2 inner walls. The elastic tube 7 is an elastic sealing body.
The jar body 2 is the drum of vertical setting, and the upper end of jar body 2 is sealed through tank deck 3, and the bottom of jar body 2 is sealed through tank bottoms 1. The tank bottom 1 is a disc horizontally arranged, the diameter of the tank bottom 1 is larger than the outer diameter of the tank body 2, the tank bottom 1 and the tank body 2 are coaxially arranged, and the bottom of the tank body 2 is hermetically connected with the tank bottom 1. The tank top 3 is in a spherical shape with an upward convex middle part, the tank top 3 is coaxially arranged on the upper side of the tank body 2, and the bottom of the tank bottom 1 is hermetically connected with the top of the tank body 2.
The upper side of the tank body 2 is provided with a breather valve 10, and the breather valve 10 is arranged on the upper side of the tank top 3. The side of the tank 2 is provided with a foam inlet 9, and the foam inlet 9 is arranged at the top of the tank 2.
The floating disc 5 is coaxially arranged in the tank body 2, the floating disc 5 is a disc made of stainless steel, the diameter of the floating disc 5 is smaller than the inner diameter of the tank body 2, and the tongue-shaped seal 4 is arranged between the floating disc 5 and the inner wall of the tank body 2, so that the material can be prevented from leaking from the gap between the floating disc 5 and the inner wall of the tank body 2. The tongue-shaped seal 4 is not required to be arranged between the floating disc 5 and the tank body 2, and the floating disc 5 is connected with the tank body 2 in a sliding way. The floating plate 5 may be a disk made of a non-metallic material.
The tank body 2 is internally coaxially provided with an elastic cylinder 7, the elastic cylinder 7 is a cylinder with two open ends, and the elastic cylinder 7 is arranged between the floating plate 5 and the foam inlet 9. Sealing ring 8 is installed to 2 inner walls of the jar body, sealing ring 8 is buckled by the angle steel and is formed, the outside of sealing ring 8 and the inner wall sealing connection of the jar body 2, sealing ring 8 sets up the top at the jar body 2, and sealing ring 8 sets up the downside at foam entry 9, elastic cylinder 7 sets up between sealing ring 8 and floating disc 5, the upper end and the sealing ring 8 sealing connection of elastic cylinder 7, the lower extreme of elastic cylinder 7 and the upside sealing connection of floating disc 5, the diameter of elastic cylinder 7 is less than the diameter of floating disc 5 slightly, elastic cylinder 7 sets up with jar internal 2 inner wall interval, thereby form sealed chamber 6 between elastic cylinder 7 and jar internal 2 inner walls. The tongue seal 4 is arranged just below the seal chamber 6. The elastic cylinder 7 is in a corrugated pipe shape, so that the elasticity of the elastic cylinder 7 is increased, the synchronous stretching of the elastic cylinder 7 along with the lifting of the floating plate 5 is ensured, and the elastic cylinder 7 is made of hydrogenated butadiene-acrylonitrile rubber. The axial length of the elastic cylinder 7 is equal to the safety height of the tank body 2.
The lower side of the floating plate 5 is provided with a plurality of floating boats connected with the floating plate 5, and the floating boats are uniformly distributed at intervals around the side part of the floating plate 5. Thereby ensuring balance between the gravity and the buoyancy of the floating plate 5. The pontoon is a compartment arranged around the bottom of the floating plate 5, thereby increasing the buoyancy of the floating plate 5.
When receiving materials, the floating disc 5 rises, the elastic cylinder 7 automatically axially contracts, volatile gas overflowing from the tongue-shaped seal 4 and the inner wall of the tank body 2 enters the seal cavity 6, the gas is compressed, when the pressure reaches the saturated vapor pressure of the materials, the volatile gas does not volatilize any more, and meanwhile, the elastic cylinder 7 also expands inwards; when the material is discharged, the floating plate 5 descends, the elastic tube 7 automatically extends axially, the gas volume is increased, when the pressure is lower than the saturated vapor pressure of the material, part of liquid is converted into gas, and simultaneously, the elastic tube 7 also contracts inwards. The whole process has no discharge, the gas is only converted in a sealed cavity 6, and the cavity at the upper part of the floating disc 5 is a clean space without VOCs.
The method for avoiding the discharge of VOCs comprises the following steps:
step 1) storing a liquid raw material into a tank body 2, arranging a floating disc 5 in the tank body 2, and arranging the floating disc 5 on the surface of the liquid raw material in a floating manner;
the liquid raw material is stored in the tank body 2, the floating disc 5 is arranged in the tank body 2, and the floating disc 5 is arranged coaxially with the tank body 2. The diameter of the floating disc 5 is smaller than the inner diameter of the tank body 2, a tongue-shaped seal 4 is arranged between the floating disc 5 and the inner wall of the tank body 2, the inner side of the tongue-shaped seal 4 is connected with the outer side of the floating disc 5 in a sealing manner, and the outer side of the tongue-shaped seal 4 is connected with the inner wall of the tank body 2 in a sliding manner.
Step 2) arranging an elastic sealing body on the upper side of the floating disc 5, wherein the upper end of the elastic sealing body is in sealing connection with the upper part of the tank body 2, the lower end of the elastic sealing body is in sealing connection with the circumference of the floating disc 5, a sealing cavity 6 is formed between the elastic sealing body and the inner wall of the tank body 2, the volume of the sealing cavity 6 changes along with the lifting of the floating disc, and VOCs volatilized by the liquid raw material are stored in the sealing cavity;
the elastic cylinder 7 is arranged between the foam inlet 9 on the upper side of the tank body 2 and the floating disc 5, the elastic cylinder 7 and the tank body 2 are coaxially arranged, the outer diameter of the elastic cylinder 7 is smaller than that of the tank body 2, the elastic cylinder 7 and the tank body 2 are arranged at intervals, and the axial length of the elastic cylinder 7 is equal to the safety height. The sealing ring 8 is arranged in the tank body 2, the sealing ring 8 is arranged at the top of the tank body 2, the sealing ring 8 is arranged at the lower side of a foam inlet 9 at the top of the tank body 2, and the outer edge of the sealing ring 8 is in sealing connection with the inner wall of the tank body 2. The lower end of the elastic tube 7 is hermetically connected with the upper side of the floating plate 5, and the upper end of the elastic tube 7 is hermetically connected with the inner side of the sealing ring 8, so that a sealing cavity 6 is formed between the elastic tube 7 and the tank body 2.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (8)
1. A method for avoiding emissions of VOCs, comprising: the method comprises the following steps:
step 1) storing a liquid raw material into a tank body (2), arranging a floating disc (5) in the tank body (2), and arranging the floating disc (5) on the surface of the liquid raw material in a floating manner;
step 2) sets up the elastic sealing body at floating plate (5) upside, elastic sealing body upper end and jar body (2) upper portion sealing connection, the circumference sealing connection of elastic sealing body lower extreme and floating plate (5), forms sealed chamber (6) between elastic sealing body and jar body (2) inner wall, and the volume of sealed chamber (6) changes along with the floating plate goes up and down, and the volatile VOCs of liquid raw materials is stored in sealed chamber (6).
2. The method of avoiding VOCs emissions according to claim 1, wherein: the floating disc (5) in the step 1) is a circular stainless steel plate which is coaxial with the tank body (2).
3. A method of avoiding emissions of VOCs according to claim 1 or 2, wherein: the lower side of the floating plate (5) in the step 1) is provided with a floating boat connected with the floating plate, and the floating boat is a compartment arranged around the floating plate (5).
4. A method of avoiding emissions of VOCs according to claim 1 or 2, wherein: a tongue-shaped seal (4) is arranged between the floating disc (5) in the step 1) or the step 2) and the inner wall of the tank body (2).
5. The method of avoiding VOCs emissions according to claim 1, wherein: the upper end of the elastic sealing body in the step 2) is connected with the inner wall of the tank body (2) in a sealing way through a sealing ring (8).
6. The method of claim 5 for avoiding emissions of VOCs, wherein: the sealing ring (8) is formed by bending angle steel.
7. A method for avoiding discharge of VOCs according to claim 1 or 5, wherein: the elastic sealing body in the step 2) is an elastic cylinder (7), and the elastic cylinder (7) is in a corrugated pipe shape.
8. A method for avoiding discharge of VOCs according to claim 1 or 5, wherein: the elastic sealing body in the step 2) is made of hydrogenated butadiene-acrylonitrile rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010692.2A CN110871968A (en) | 2018-08-31 | 2018-08-31 | Method for avoiding discharge of VOCs (volatile organic compounds) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010692.2A CN110871968A (en) | 2018-08-31 | 2018-08-31 | Method for avoiding discharge of VOCs (volatile organic compounds) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110871968A true CN110871968A (en) | 2020-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811010692.2A Pending CN110871968A (en) | 2018-08-31 | 2018-08-31 | Method for avoiding discharge of VOCs (volatile organic compounds) |
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| Country | Link |
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| CN (1) | CN110871968A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2247208Y (en) * | 1996-06-14 | 1997-02-12 | 李佑廉 | Fire-proof device for inner top-floating oil tank |
| CN201068297Y (en) * | 2007-06-19 | 2008-06-04 | 江门市浦龙仓储有限公司 | Inner floating disc for oil storage tank |
| CN201712980U (en) * | 2010-07-12 | 2011-01-19 | 沈观耕 | Floating roof tank for methanol |
| CN204297427U (en) * | 2014-12-17 | 2015-04-29 | 沈科 | For floating roof and the tank arrangement of storage tank |
| CN205802054U (en) * | 2016-06-29 | 2016-12-14 | 上原国际有限公司 | For the presser type elastic sealing device that oil groove is floating roof |
| CN108069155A (en) * | 2016-11-11 | 2018-05-25 | 中国石油化工股份有限公司抚顺石油化工研究院 | A kind of storage tank discharging gas emission reduction and recovery system |
| CN105460446B (en) * | 2015-12-29 | 2018-05-29 | 中国石油化工股份有限公司青岛安全工程研究院 | A kind of crude oil External floating roof tank oil gas collecting device |
-
2018
- 2018-08-31 CN CN201811010692.2A patent/CN110871968A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2247208Y (en) * | 1996-06-14 | 1997-02-12 | 李佑廉 | Fire-proof device for inner top-floating oil tank |
| CN201068297Y (en) * | 2007-06-19 | 2008-06-04 | 江门市浦龙仓储有限公司 | Inner floating disc for oil storage tank |
| CN201712980U (en) * | 2010-07-12 | 2011-01-19 | 沈观耕 | Floating roof tank for methanol |
| CN204297427U (en) * | 2014-12-17 | 2015-04-29 | 沈科 | For floating roof and the tank arrangement of storage tank |
| CN105460446B (en) * | 2015-12-29 | 2018-05-29 | 中国石油化工股份有限公司青岛安全工程研究院 | A kind of crude oil External floating roof tank oil gas collecting device |
| CN205802054U (en) * | 2016-06-29 | 2016-12-14 | 上原国际有限公司 | For the presser type elastic sealing device that oil groove is floating roof |
| CN108069155A (en) * | 2016-11-11 | 2018-05-25 | 中国石油化工股份有限公司抚顺石油化工研究院 | A kind of storage tank discharging gas emission reduction and recovery system |
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Application publication date: 20200310 |
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| RJ01 | Rejection of invention patent application after publication |