CN109665227A - Gas pipeline purging equipment for internal floating roof tank - Google Patents
Gas pipeline purging equipment for internal floating roof tank Download PDFInfo
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- CN109665227A CN109665227A CN201710952664.1A CN201710952664A CN109665227A CN 109665227 A CN109665227 A CN 109665227A CN 201710952664 A CN201710952664 A CN 201710952664A CN 109665227 A CN109665227 A CN 109665227A
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- Prior art keywords
- control valve
- gas
- floating roof
- pipeline purging
- internal floating
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- 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
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A kind of gas pipeline purging equipment for internal floating roof tank, it include: knockout drum, the top of knockout drum passes through first pipe respectively and second pipe is connected to the top by pipeline purging pipeline and internal floating roof tank, and bottom is connected to the bottom of internal floating roof tank by third pipeline；Fluid level transmitter, for detecting the liquid level of knockout drum and liquid level being transmitted to controller；Valve group, including the first control valve, the second control valve, third control valve door and check-valves, first control valve is set in first pipe, second control valve is set on second pipe, third control valve door and check-valves are all set on third pipeline, and third control valve door, close to knockout drum, check-valves is close to internal floating roof tank；Controller, for receiving liquid level and being opened or closed according to the first control valve of Liquid level, the second control valve and third control valve door.The equipment can effectively realize gas-liquid two-phase separation, avoid disturbance of the pipeline purging gas to liquid phase.
Description
Technical field
The present invention relates to petrochemical industry material storing field, in particular to a kind of gas pipeline purging for internal floating roof tank is set
It is standby.
Background technique
With the high speed development of China's derived energy chemical industry, the demand of crude oil is constantly in a high position, and China is former within 2016
Oil yield is 200,000,000 tons, and 3.8 hundred million tons of imported crude oil is just able to satisfy, which means that the oil-refining chemical ability in China wants matched
The development of economic construction, a critically important ring is the storage of petrochemical materials, product in oil-refining chemical.
In petrochemical industry storage and transportation field, the storage of various materials is related to different equipment, wherein for high-volume material
Storage, the equipment usually selected is storage tank.The form of storage tank is varied, can be divided into generally according to the difference of pressure store
Atmospheric storage tank, low pressure storage tank, pressure vessel.Wherein atmospheric storage tank includes fixed roof tank, internal floating roof tank, External floating roof tank again
Deng.
For storage boiling point, more than or equal to 45 DEG C or at 37.8 DEG C, saturated vapour pressure is not more than the B-grade in the first class of 88kPa, second A
Class I liquid I (except special chemicals), such as gasoline, kerosene, light diesel fuel, Chang Xuanyong internal floating roof tank are stored, inner floating roof storage
Tank, which refers to, is provided with the storage tank of floating plate in fixed roof tank, can greatly reduce the evaporating loss of pot liquid medium in this way.
Petroleum, chemical plant or oil depot etc. can inevitably encounter plan or disastershutdown, inspection during production run
Repair state.When overhauling various equipment pipes, the medium in pipeline is purged completely, then carrying out fire operation again is a kind of safety
Reliable operating method.
Currently, pipeline liquid is purged into internal floating roof tank the method there are no mature and reliable using gas, mainly
Because during gas pipeline purging, will form biphase gas and liquid flow, gas can be imported and exported with liquid by liquid in storage tank to be entered together
In internal floating roof tank, or because can not accurate judgement swept medium and swept into completely the time of internal floating roof tank, also have portion
Divide gas to enter in internal floating roof tank, cause the violent disturbance of medium in tank, deviates the floating plate inside internal floating roof tank predetermined
Position, serious situation may cause floating plate and topples, and cause safety accident.Part factory can also use the material in pipeline
Being swept into slop tank, perhaps then sump oil system carries out freshening or other schemes handled again, will cause certain material in this way
With the waste of energy.
Therefore, expect a kind of gas pipeline purging equipment for internal floating roof tank that is safe and reliable, can be avoided waste.
Summary of the invention
The purpose of the present invention is to propose to a kind of gas pipeline purging equipment for internal floating roof tank, to overcome existing equipment safe
Property it is poor, waste material and energy defect.
The present invention uses following solution:
A kind of gas pipeline purging equipment for internal floating roof tank, comprising:
Knockout drum, the top of the knockout drum passes through first pipe respectively and second pipe is connected to by pipeline purging
The bottom at the top of pipeline and internal floating roof tank, the knockout drum is connected to the internal floating roof tank by third pipeline
Bottom；
Fluid level transmitter, the fluid level transmitter are used to detect the liquid level of the knockout drum and transmit the liquid level
To controller；
Valve group, the valve group include the first control valve, the second control valve, third control valve door and check-valves,
Wherein first control valve is set in the first pipe, and second control valve is set to the second pipe
On, the third control valve door and check-valves are all set on the third pipeline, and the third control valve door is close to described
Knockout drum, the check-valves is close to the internal floating roof tank；
The controller, the controller for receive the liquid level and according to first control valve of Liquid level,
Second control valve and third control valve door open or close.
Preferably, the knockout drum is the vertical barrel type tank that both ends have ellipsoidal head.
Preferably, the knockout drum is the vertical barrel type tank that both ends have discount vibram outlet end socket.
Preferably, first control valve, the second control valve and third control valve door are operated pneumatic valve or motor-driven valve
Door.
Preferably, described to be equipped with pipeline purging gas valve by pipeline purging pipeline, pipeline purging gas passes through the pipeline purging gas valve
Into described by pipeline purging pipeline.
Preferably, the pipeline purging gas is inert gas.
Preferably, the gas pipeline purging equipment for internal floating roof tank further includes starting switch, when the starting starting
When switch, the pipeline purging gas valve is opened, and the controller controls first control valve and opens, and controls second control
Valve processed is opened, and is controlled the third control valve door and closed.
Preferably, the controller compares the liquid level H that current time fluid level transmitter detectstWith predetermined fluid level L, work as Ht>
When L, the controller control described second is controled valve closing, and controls the third control valve door and open.
Preferably, the controller compares the liquid level H that current time fluid level transmitter detectstBecome with previous moment liquid level
The liquid level H for sending device to detectt-△t, and the liquid level HtWith the predetermined fluid level L, work as Ht<Ht-△tAnd HtIt is described when < L
Controller controls second control valve and opens, and controls first control valve and the closing of third control valve door.
Compared with prior art, the beneficial effects of the present invention are:
(1) so that pipeline purging gas is entered the gas-phase space above internal floating roof tank, liquid phase is made to enter the liquid phase of internal floating roof tank
Space avoids disturbance of the pipeline purging gas to liquid phase, can safely and efficiently reach to effectively realize gas-liquid two-phase separation
Pipeline internal medium is swept into the purpose of internal floating roof tank with gas；
(2) operation of each valve, high degree of automation are controlled by controller；
(3) small investment, technical solution is simple, reliable, economy and operability with higher.
Equipment of the invention has other characteristics and advantages, these characteristics and advantages from the attached drawing being incorporated herein and with
It will be apparent in specific embodiment afterwards, or will be in the attached drawing and subsequent specific embodiment being incorporated herein
Middle to be stated in detail, the drawings and the detailed description together serve to explain specific principles of the invention.
Detailed description of the invention
Exemplary embodiment of the present is described in more detail in conjunction with the accompanying drawings, of the invention is above-mentioned and other
Purpose, feature and advantage will be apparent, wherein in exemplary embodiments of the present invention, identical reference label is usual
Represent same parts.
The structure that Fig. 1 shows the gas pipeline purging equipment according to an exemplary embodiment of the present invention for internal floating roof tank is shown
It is intended to.
Description of symbols:
1- knockout drum, 2- internal floating roof tank, 3- fluid level transmitter, the first control valve of 4-, the second control valve of 5-,
6- third control valve door, 7- check-valves, 8- pipeline purging gas valve, 9- are started switch, and 10- is by pipeline purging pipeline.
Specific embodiment
The present invention will be described in more detail below with reference to accompanying drawings.Although showing the preferred embodiment of the present invention in attached drawing,
However, it is to be appreciated that may be realized in various forms the present invention and should not be limited by the embodiments set forth herein.On the contrary, providing
These embodiments are of the invention more thorough and complete in order to make, and can will fully convey the scope of the invention to ability
The technical staff in domain.
Gas pipeline purging equipment according to an exemplary embodiment of the present invention for internal floating roof tank includes:
Knockout drum, the top of knockout drum passes through first pipe respectively and second pipe is connected to by pipeline purging pipeline
With the top of internal floating roof tank, the bottom of knockout drum is connected to the bottom of internal floating roof tank by third pipeline；
Fluid level transmitter, fluid level transmitter are used to detect the liquid level of knockout drum and liquid level are transmitted to controller；
Valve group, valve group include the first control valve, the second control valve, third control valve door and check-valves, wherein
First control valve is set in first pipe, and the second control valve is set on second pipe, third control valve door and non-return
Valve is all set on third pipeline, and third control valve door, close to knockout drum, check-valves is close to internal floating roof tank；
Controller, controller is for receiving liquid level and according to the first control valve of Liquid level, the second control valve and the
Three control valves open or close.
The course of work of gas pipeline purging equipment according to an exemplary embodiment of the present invention for internal floating roof tank is as follows:
Before starting pipeline purging, the first control valve and the second control valve are opened, closes third control valve door；
After starting pipeline purging, pipeline purging gas will be swept into knockout drum by the liquid in pipeline purging pipeline, knockout drum
Liquid level start to be gradually increased, which detects and is transmitted to controller by fluid level transmitter, detects when fluid level transmitter
When liquid level is greater than predetermined fluid level, controller controls third control valve door and opens, and controls and second control valve closing, in this way with
Liquid level gradually rises, and knockout drum internal upper part gas is compressed, and pressure becomes larger, when the pressure is greater than knockout drum
When static pressure difference between internal floating roof tank, medium is swept by third pipeline and is pressed into internal floating roof tank；
After having been swept by the liquid in pipeline purging pipeline, pipeline purging gas initially enters knockout drum, leads to knockout drum
Interior liquid level continues to decline, and the variation of liquid level detects and be transmitted to controller by fluid level transmitter, when controller judges that liquid level becomes
When the liquid level for sending device to detect is in during decline and liquid level is less than predetermined value, controller controls the second control valve and opens,
And the first control valve and the closing of third control valve door are controlled, pipeline purging gas does not enter back by pipeline purging pipeline, and pipeline purging stops.
Gas pipeline purging equipment according to an exemplary embodiment of the present invention for internal floating roof tank can make pipeline purging gas into
Enter the gas-phase space above internal floating roof tank, liquid phase is made to enter the liquid Space of internal floating roof tank, to effectively realize gas-liquid
Two-phase laminated flow avoids disturbance of the pipeline purging gas to liquid phase.
In one example, knockout drum is vertical barrel type tank of the both ends with ellipsoidal head or discount vibram outlet end socket,
It is highly preferred that knockout drum is vertical and cylindrical tank.The size of knockout drum is unlimited, can be carried out according to practical operation demand
Setting.
In one example, the first control valve, the second control valve and third control valve door are operated pneumatic valves or electronic
Valve.
In one example, by pipeline purging pipeline be equipped with pipeline purging gas valve, pipeline purging gas by pipeline purging gas valve into
Enter by pipeline purging pipeline.
In one example, pipeline purging gas is inert gas or other gases appropriate.
It in one example, further include starting switch for the gas pipeline purging equipment of internal floating roof tank, when the starting starting
When switch, pipeline purging gas valve is opened, and controller controls the first control valve and opens, and the second control valve of control is opened, and is controlled
Third control valve door processed is closed.In this way, pipeline purging gas passes through pipeline purging gas trap when manually starting this and starting switch
Door enters by pipeline purging pipeline, starts to carry out pipeline purging.
In one example, controller compares the liquid level H that current time fluid level transmitter detectstWith predetermined fluid level L, when
HtWhen > L, controller control second is controled valve closing, and controls third control valve door opening.In this case, with liquid
Position gradually rise, knockout drum internal upper part gas is compressed, and pressure becomes larger, when the pressure be greater than knockout drum with
When static pressure difference between internal floating roof tank, medium is swept by third pipeline and is pressed into internal floating roof tank.
In one example, controller compares the liquid level H that current time fluid level transmitter detectstWith previous moment liquid level
The liquid level H that transmitters sense arrivest-△t(the wherein sampling interval that △ t indicates fluid level transmitter), and compare liquid level HtWith it is predetermined
Liquid level L, works as Ht<Ht-△tAnd HtWhen < L, i.e., the liquid level in knockout drum is in during decline and liquid level is lower than predetermined fluid level L
When, controller controls the second control valve and opens, and controls the first control valve and the closing of third control valve door.In such case
Under, pipeline purging gas does not enter back by pipeline purging pipeline, and pipeline purging stops.
Embodiment
The structure that Fig. 1 shows the gas pipeline purging equipment according to an exemplary embodiment of the present invention for internal floating roof tank is shown
It is intended to, as shown in Figure 1, the gas pipeline purging equipment for internal floating roof tank includes:
Knockout drum 1, the top of knockout drum 1 passes through first pipe respectively and second pipe is connected to by scavenger pipe
The top in road 10 and internal floating roof tank 2, the bottom of knockout drum 1 are connected to the bottom of internal floating roof tank 2 by third pipeline；
Fluid level transmitter 3, fluid level transmitter 3 are used to detect the liquid level of knockout drum 1 and liquid level are transmitted to controller
(not shown)；
Valve group, valve group include the first control valve 4, the second control valve 5, third control valve door 6 and check-valves 7,
Wherein the first control valve 4 is set in first pipe, and the second control valve 5 is set on second pipe, third control valve door 6
It is all set on third pipeline with check-valves 7, and third control valve door 6, close to knockout drum 1, check-valves 7 is close to inner floating roof
Storage tank 2；
Controller, controller is for receiving liquid level and according to Liquid level the first control valve 4,5 and of the second control valve
Third control valve door 6 opens or closes.
Wherein, knockout drum 1 is the vertical and cylindrical tank that both ends have discount vibram outlet shape end socket.
Wherein, the first control valve 4, the second control valve 5 and third control valve door 6 are operated pneumatic valves.
Wherein, pipeline purging gas valve 8 is equipped with by pipeline purging pipeline 10, pipeline purging gas enters quilt by pipeline purging gas valve 8
Pipeline purging pipeline 10.
Wherein, which further includes starting switch 9, and when starting, this starts switch 9, pipeline purging gas valve 8 is opened, control
Device controls the first control valve 4 and opens, and the second control valve 5 of control is opened, and controls third control valve door 6 and close.
The course of work of gas pipeline purging equipment according to the embodiment for internal floating roof tank is as follows:
It is manually pressed by and starts switch 9, pipeline purging gas valve 8 is opened, and controller controls the first control valve 4 and opens, control
Second control valve 5 is opened, and is controlled third control valve door 6 and closed, and starts to carry out pipeline purging；
After starting pipeline purging, pipeline purging gas will be swept into knockout drum 1 by the liquid in pipeline purging pipeline 10, gas-liquid separation
The liquid level H of tank 1 starts to be gradually increased, and liquid level H detects and be transmitted to controller by fluid level transmitter 3, when fluid level transmitter 3 is examined
When the liquid level H measured is greater than predetermined fluid level L, controller controls third control valve door 6 and opens, and controls the second control valve 5 and close
It closes, in this way gradually rising with liquid level H, 1 internal upper part gas of knockout drum is compressed, and pressure becomes larger, when the pressure
When poor greater than static pressure between knockout drum 1 and internal floating roof tank 2, medium is swept by third pipeline and is pressed into inner floating roof
Storage tank 2；
After having been swept by the liquid in pipeline purging pipeline 10, pipeline purging gas initially enters knockout drum 1, leads to gas-liquid separation
Liquid level H in tank 1 is continued to decline, and liquid level H detects and be transmitted to controller by fluid level transmitter 3, when controller judges liquid level H
When declining and being less than predetermined value L, controller controls the second control valve 5 and opens, and the first control valve 4 of control and third control
Valve 6 is closed, and pipeline purging gas does not enter back by pipeline purging pipeline 10, and pipeline purging stops.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (9)
1. a kind of gas pipeline purging equipment for internal floating roof tank characterized by comprising
Knockout drum, the top of the knockout drum passes through first pipe respectively and second pipe is connected to by pipeline purging pipeline
With the top of internal floating roof tank, the bottom of the knockout drum is connected to the bottom of the internal floating roof tank by third pipeline
Portion；
Fluid level transmitter, the fluid level transmitter are used to detect the liquid level of the knockout drum and the liquid level are transmitted to control
Device processed；
Valve group, the valve group include the first control valve, the second control valve, third control valve door and check-valves, wherein
First control valve is set in the first pipe, and second control valve is set on the second pipe, institute
It states third control valve door and check-valves is all set on the third pipeline, and the third control valve door is close to the gas-liquid point
From tank, the check-valves is close to the internal floating roof tank；
The controller, the controller is for receiving the liquid level and according to first control valve of Liquid level, second
Control valve and third control valve door open or close.
2. the gas pipeline purging equipment according to claim 1 for internal floating roof tank, which is characterized in that the gas-liquid separation
Tank is the vertical barrel type tank that both ends have ellipsoidal head.
3. the gas pipeline purging equipment according to claim 1 for internal floating roof tank, which is characterized in that the gas-liquid separation
Tank is the vertical barrel type tank that both ends have discount vibram outlet end socket.
4. the gas pipeline purging equipment according to claim 1 for internal floating roof tank, which is characterized in that first control
Valve, the second control valve and third control valve door are operated pneumatic valve or electrically operated valve.
5. the gas pipeline purging equipment according to claim 1 for internal floating roof tank, which is characterized in that described by scavenger pipe
Road is equipped with pipeline purging gas valve, and pipeline purging gas is entered described by pipeline purging pipeline by the pipeline purging gas valve.
6. the gas pipeline purging equipment according to claim 5 for internal floating roof tank, which is characterized in that the pipeline purging gas
For inert gas.
7. the gas pipeline purging equipment according to claim 1 for internal floating roof tank, which is characterized in that further include that starting is opened
It closes, when starting switch described in the starting, the pipeline purging gas valve is opened, and the controller controls first control valve and beats
It opens, controls second control valve and open, and control the third control valve door and close.
8. the gas pipeline purging equipment according to claim 1 for internal floating roof tank, which is characterized in that the controller ratio
The liquid level H detected compared with current time fluid level transmittertWith predetermined fluid level L, work as HtWhen > L, the controller control described second
It controls valve closing, and controls the third control valve door and open.
9. the gas pipeline purging equipment according to claim 8 for internal floating roof tank, which is characterized in that the controller ratio
The liquid level H detected compared with current time fluid level transmittertThe liquid level H detected with previous moment fluid level transmittert-△t, and ratio
The liquid level HtWith the predetermined fluid level L, work as Ht<Ht-△tAnd HtWhen < L, the controller controls second control valve and beats
It opens, and controls first control valve and third control valve door and close, wherein △ t is indicated between the sampling of the fluid level transmitter
Every.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952664.1A CN109665227A (en) | 2017-10-13 | 2017-10-13 | Gas pipeline purging equipment for internal floating roof tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952664.1A CN109665227A (en) | 2017-10-13 | 2017-10-13 | Gas pipeline purging equipment for internal floating roof tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109665227A true CN109665227A (en) | 2019-04-23 |
Family
ID=66138679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710952664.1A Pending CN109665227A (en) | 2017-10-13 | 2017-10-13 | Gas pipeline purging equipment for internal floating roof tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109665227A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111522367A (en) * | 2020-05-26 | 2020-08-11 | 宝钢化工湛江有限公司 | Automatic drainage system of light oil |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583356A (en) * | 2016-11-22 | 2017-04-26 | 启东兴东石化设备制造有限责任公司 | Gas blocking pressure stabilizer |
-
2017
- 2017-10-13 CN CN201710952664.1A patent/CN109665227A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583356A (en) * | 2016-11-22 | 2017-04-26 | 启东兴东石化设备制造有限责任公司 | Gas blocking pressure stabilizer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111522367A (en) * | 2020-05-26 | 2020-08-11 | 宝钢化工湛江有限公司 | Automatic drainage system of light oil |
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Application publication date: 20190423 |