CN108100509A - A kind of device for storing liquid for preventing chemicals volatile emission - Google Patents
A kind of device for storing liquid for preventing chemicals volatile emission Download PDFInfo
- Publication number
- CN108100509A CN108100509A CN201611047623.XA CN201611047623A CN108100509A CN 108100509 A CN108100509 A CN 108100509A CN 201611047623 A CN201611047623 A CN 201611047623A CN 108100509 A CN108100509 A CN 108100509A
- Authority
- CN
- China
- Prior art keywords
- inner cylinder
- flexible inner
- container
- liquid
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B65D90/02—Wall construction
- B65D90/04—Linings
- B65D90/046—Flexible liners, e.g. loosely positioned in the container
-
- 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
- B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
Abstract
The flexible inner cylinder of installing one in the container of storage liquid chemical, flexible inner cylinder bottom seal, open top, sealing is fixed on the top or top of the container at the top of flexible inner cylinder, make to form a closed liquid storage space between flexible inner cylinder and container inner wall, liquid chemical is in and out of between container inner wall and flexible inner cylinder, and flexible inner cylinder freely stretches with the variation of institute's tank body volume；Diameter or perimeter when flexible inner cylinder is fully extended on its arbitrary cross section is not less than the internal diameter or perimeter at the container same location；The material for preparing flexible inner cylinder is the film of high molecular polymer.Device for storing liquid provided by the present invention can effectively prevent chemicals volatile emission, avoid pollutions of the VOCs to atmospheric environment.
Description
Technical field
The present invention relates to a kind of devices of chemical storage, and particularly relating to one kind prevents chemicals during storage
The equipment of volatilization belongs to petrochemical industry equipment field.
Background technology
There are many big and small storage tank in chemical plant, for storing various chemicals.These storage tanks are generally normal pressure
Container during chemicals is stored, for the pressure balance in holding container, is often designed with breather valve and connects with air
It is logical.When liquid volume changes in container, gas can be sucked or discharged by breather valve.Due to the relation of substance vapour pressure,
The harmful chemicals not waited containing concentration inevitably in the gas of discharge.Thus cause seriously to pollute to atmospheric environment,
The loss of chemicals is caused simultaneously.Cause there are two the principal elements that liquid volume changes in container：First, since technique is grasped
The variation for the liquid volume that the needs of work are brought, second is that the change that liquid caused by atmospheric temperature variation expands with heat and contract with cold and generates
Change.In general, the volume of container (some industries are referred to as storage tank) is bigger, chemicals saturated vapour pressure is higher, liquid level ripple
The dynamic frequency is more, and the chemical volume breathed out to air is bigger.
Since chemical kind is various, the container for storing these chemicals disperses, and the gas of exhalation is difficult to unified collection etc.
Factor brings very big difficulty to air improvement.Although developing many targetedly technologies at present to be tackled, such as inhale
Attached method, absorption process, burning method etc., but these technologies are all post-processings, and applicable surface is narrow, investment for trnasforming urban land is big, is not easy large area and pushes away
It is wide to use.The example for comparing successful application is using internal floating roof tank, and the discharge of chemicals, but its can be effectively controlled from source
Complicated, cost is high, the problems such as also leakage there are the dynamic sealing between inner floating roof and tank skin, nor is suitble to chemicals life
The transformation of surge tank during production.
The content of the invention
The object of the present invention is to provide a kind of liquid storages simple in structure, cheap, can effectively preventing chemicals volatile emission to fill
It puts.
The present invention is accomplished in the following manner：
The flexible inner cylinder of installing one, flexible inner cylinder bottom seal, open top are soft in the container of storage liquid chemical
Property inner cylinder at the top of sealing be fixed on the top or top of the container, make to be formed between flexible inner cylinder and container inner wall one it is closed
Liquid storage space, liquid chemical is in and out of between container inner wall and flexible inner cylinder, flexible inner cylinder with institute's tank body volume change
Change is freely stretched；Diameter or perimeter when flexible inner cylinder is fully extended on its arbitrary cross section are not less than the similary position of the container
Put the internal diameter or perimeter at place；The material of flexible inner cylinder is prepared as the film of high molecular polymer, film thickness preferably 0.01~0.3
Millimeter.
Container using the present invention, since flexible inner cylinder can arbitrarily stretch so that between flexible inner cylinder and container inner wall
The volume of memory space can freely change within the specific limits.So when liquid volume changes in container, begin in container
Eventually in normal pressure state, there is no the situation of outside discharge of noxious gases, with existing by setting breather valve that storage tank is maintained to be in
The container of normal pressure state is compared, and fundamentally solves atmospheric storage tank VOCs emission problems.
Description of the drawings
Attached drawing 1 is a kind of structure diagram of the device for storing liquid of the present invention.
Attached drawing 2 is the structure diagram of device for storing liquid used by the embodiment of the present invention.
Symbol description is as follows：
1- containers, 2- flexibility inner cylinders,
Po- atmospheric pressure；Pressure on P- liquid levels
The highest liquid level of LHH- containers, the minimum liquid level of L- containers
D- insides diameter of vessel, Do- inner diameter of steel flue
A1- liquid inlet openings, A2- liquid outlet openings, A3- exhaust outlets
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, but the present invention is not limited thereby.
Attached drawing 1 is a kind of structure diagram of the device for storing liquid of the present invention.The present invention is the appearance in storage liquid chemical
Flexible inner cylinder 2, flexible inner cylinder bottom seal, open top, top are close made of one high molecular polymer film of installing in device 1
Sealing is scheduled on the container highest liquid level LHH, and the liquid storage space of a closing is formed between flexible inner cylinder and container inner wall
VL, liquid chemical are in and out of the liquid storage SPACE V L of closing, and when liquid level raises in VL, flexible inner cylinder bottom is by liquid
Impetus freely rolls into a ball contracting upwards, and when liquid is reduced in VL, the effect of inner cylinder then pressure difference (Po-P) is stretched downwards with surrounding
Exhibition, and it is rapidly reached balance (Po-P=0).
According to the present invention, diameter or perimeter when flexible inner cylinder is fully extended on its arbitrary cross section are not less than the appearance
Internal diameter or perimeter at device same location, i.e. Do are not less than D, this is the key that form the present invention.The purpose for the arrangement is that when soft
When property inner cylinder is radially extending, it is ensured that inner cylinder film is affixed on the inner wall of container, so as to avoid film and tank body by inside and outside differential pressure
Effect and deform or damage.In general, it is suitable Do-D to be controlled at 0~0.5 meter.
According to the present invention, when flexible inner cylinder is fully extended its bottommost be not higher than container minimum liquid level (L), preferably its
Bottommost is not higher than the discharge port (A2) of container.The purpose for the arrangement is that ensure flexibility inner cylinder when low liquid level or even aneroid bit manipulation
Bottom can freely stretch, and film and tank body is avoided to be subject to the effect of inside and outside differential pressure and damage.
Apparent force-extension situation is not present in method according to the invention, flexible inner cylinder in container, therefore to preparing
The tensile strength of the high molecular polymer film of flexible inner cylinder does not require particularly, and general commercially available film can meet will
It asks.There are many this kind of high molecular polymer film species, such as by polythene PE, polypropylene PP, polyvinylchloride, polystyrene
OPS, nylon PA, polyethylene terephtalate, PVAC polyvinylalcohol, ethylene-vinyl alcohol copolymer EVOH, vinyl cyanide
Polymer P AN, metachloroethylene copolymer PVDC, special nylon, polyethylene naphthalate PEN, polytetrafluoroethylene (PTFE), neoprene rubber
Film that glue, natural rubber, butyl, butyronitrile etc. are made etc..In addition, there is the modification much based on above-mentioned polymer
Film, such as PVA coating films, PVDC coating films, metallized film, plating silicon thin film, water-fast modified PVA film, EVOH PP TYPEs
Deng.Since chemical kind is various, nature difference is very big, and cylinder material in selection flexibility need to follow following principle, first, film pair
Stored up chemicals has good barrier property, that is, stored up chemicals cannot penetrate film；Second is that not by stored chemicals burn into
Dissolving or swelling；Third, the temperature under tolerance storage condition, fourth, easy to process.For organic acid medium, preferred rubber class,
PVC, PVA and the composite membrane containing these compositions；For aromatic series, cycloalkane, fats medium, preferably PVA, PA or contain
There are the composite membrane of PVA, PA；For aldehydes medium preferred rubber class, PVC film；For alcoholic medium preferred rubber class, containing PVDC
Or the film of PVC compositions；In addition metallized film has good barrier property and tolerance to most chemicals；The present invention is right
The selection of film is not specially limited.It is cheap for principle, suitable film to be easy to telescopic folding on the thickness of film
Thickness is 0.01 millimeter to 1 millimeter, preferably 0.01 to 0.5 millimeter, more preferable 0.01 to 0.3 millimeter.
Method according to the invention, flexible inner cylinder can be made of plural layers, and different high scores can be used per layer film
Sub- polymer material, benefit are barrier property highers, can also play multilayer protective effect, when certain layer because breakage occurs for fortuitous event
When, other layers still can ensure that chemicals does not volatilize to air.Theoretically the number of plies is more, and safety coefficient is bigger, but crosses multilayer
More liquid storage spaces can be occupied, also increase cost, preferably 1 to 10 layers, more preferable 1 to 5 layers.
According to the present invention, flexible inner cylinder bottom seal, open top, inner cylinder top, which seals, is fixed on the container highest liquid
Any position on the LHH of position, can seal and be fixed on inside container, can also seal and be fixed on the manhole of container top,
At this moment a dust cover is added preferably above manhole.Fixed form is sealed there are many form, simplest mode is to tie up, the present invention
This is not specially limited.
The container refers to the storage tank that liquid is stored made of metal or engineering plastics, can be spherical storage tank, vertical
Flat flat-top storage tank, vertical flat-bottom pinnacle storage tank, vertical elliptical end socket storage tank etc. can set liquid level gauge mouth, exhaust outlet etc. and set on tank
It applies, the present invention is not particularly limited this.Setting on inlet and liquid outlet is quantitatively arbitrary, can also share one
A mouth, liquid in-out mouth is preferably provided at container bottom, and when being arranged on container top, preferably bottom insert canal is close to the wall cloth of container
It puts.
, it is necessary to the gas between inner cylinder and container be emptied, suitable purging method such as exhaust liquid method before liquid is stored,
Vacuum suction method etc., the present invention is not particularly limited.
Device for storing liquid according to the invention, saturated vapour pressure of the stored chemicals under storage temperature should be less than
100kPa。
Embodiment
Next the embodiment of the present invention is provided, but the present invention is from its any restriction.
Embodiment 1
As shown in Figure 2, the flexible inner cylinder of installing one, wherein 2 meters of the diameter of container, tangent line in the container of storage toluene
Highly 3 meters, 2.1 meters of diameter when flexible inner cylinder is fully extended, 4.2 meters high, inner cylinder is fixed on container in a manner that multilayer is tied up
On the manhole at top.Interior cylinder material be polyvinyl alcohol film, 0.08 millimeter of thickness.It, will be soft using degassing method before toluene is packed into
Property inner cylinder and container between air emptying, flexible inner cylinder is made to trail in container.Toluene by container bottom is injected with pump and is stored up
Liquid space, until liquid level 80% or so, 8 it is small when after liquid level in container is down to 30% or so, it is then again that toluene injection liquid storage is empty
Between to liquid level 80% or so, with this repetitive operation.The sampling detection toluene level at manhole daily, is not detected first in continuous 30 days
Benzene.Flexible inner cylinder inspection is split out, is stood intact.
Embodiment 2
Using apparatus and method same as Example 1, acetone is stored.The sampling detection content of acetone at manhole daily,
Acetone is not detected within continuous 10 days.Flexible inner cylinder inspection is split out, is stood intact.
Embodiment 3
Using apparatus and method same as Example 1, ethyl alcohol is stored.Interior cylinder material is PVDC films, and thickness 0.05 is in the least
Rice.The sampling detection ethanol content at manhole daily, is not detected ethyl alcohol in continuous 10 days.Split out flexible inner cylinder inspection, intact nothing
Damage.
Embodiment 4
Using apparatus and method same as Example 1, ethyl acetate is stored.Interior cylinder material be metallized film, thickness 0.1
Millimeter.The sampling detection ethyl acetate content at manhole daily, is not detected ethyl acetate in continuous 10 days.Split out flexible inner cylinder inspection
It looks into, stands intact.
Embodiment 5
Using apparatus and method same as Example 4, hexamethylene is stored.Sampling detection hexamethylene contains at manhole daily
Amount, is not detected hexamethylene in continuous 10 days.Flexible inner cylinder inspection is split out, is stood intact.
Embodiment 6
Using apparatus and method same as Example 1, toluene is stored.Interior cylinder material be PA films, 0.1 millimeter of thickness.
The sampling detection toluene level at manhole daily, is not detected toluene in continuous 10 days.Flexible inner cylinder inspection is split out, is stood intact.
Although the present invention is described and illustrated by reference to specific embodiment, those skilled in the art
It will recognize that the present invention is suitable for different versions, they need not be explained herein.Therefore, in order to determine this
The true scope of invention, it should uniquely with reference to appended claim.
Claims (3)
1. a kind of device for storing liquid for preventing chemicals volatile emission, it is characterized in that：
The flexible inner cylinder of installing one in the container of storage liquid chemical, flexible inner cylinder bottom seal, open top, in flexibility
The sealing of cylinder top is fixed on the top or top of the container, makes to form a closed storage between flexible inner cylinder and container inner wall
Liquid space, liquid chemical are in and out of between container inner wall and flexible inner cylinder, flexible inner cylinder with institute's tank body volume variation from
By stretching；Diameter or perimeter when flexible inner cylinder is fully extended on its arbitrary cross section is not less than at the container same location
Internal diameter or perimeter；The material for preparing flexible inner cylinder is the film of high molecular polymer, and the thickness of film is 0.01~0.3 milli
Rice.
2. device for storing liquid according to claim 1, it is characterised in that the flexibility inner cylinder is by 1~5 floor height Molecularly Imprinted Polymer
Film form.
3. device for storing liquid according to claim 1, which is characterized in that when flexible inner cylinder is fully extended, flexible inner cylinder
Bottommost be not higher than container liquid outlet opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611047623.XA CN108100509A (en) | 2016-11-25 | 2016-11-25 | A kind of device for storing liquid for preventing chemicals volatile emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611047623.XA CN108100509A (en) | 2016-11-25 | 2016-11-25 | A kind of device for storing liquid for preventing chemicals volatile emission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108100509A true CN108100509A (en) | 2018-06-01 |
Family
ID=62203979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611047623.XA Pending CN108100509A (en) | 2016-11-25 | 2016-11-25 | A kind of device for storing liquid for preventing chemicals volatile emission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108100509A (en) |
-
2016
- 2016-11-25 CN CN201611047623.XA patent/CN108100509A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180601 |