CN110155551A - Storage tank VOCs safe collection method - Google Patents
Storage tank VOCs safe collection method Download PDFInfo
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- CN110155551A CN110155551A CN201810148560.XA CN201810148560A CN110155551A CN 110155551 A CN110155551 A CN 110155551A CN 201810148560 A CN201810148560 A CN 201810148560A CN 110155551 A CN110155551 A CN 110155551A
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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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- 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
- B65D90/30—Recovery of escaped 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
- 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
-
- 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
- B65D90/48—Arrangements of indicating or measuring devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to normal pressure and low pressure storage tank volatile organic matter safe collection technical fields, disclose a kind of storage tank volatile organic matter safe collection method, the following steps are included: the tank battery VOCs categorised collection of various materials, the storage tank VOCs connection of of the same race or similar material is handled, the measure processing of nitrogen envelope, the stringent effort processing of the tank battery security control of various materials, the tank battery VOCs emission treatment of various materials.The present invention not only significantly reduces storage tank and fire risk occurs, but also can also be achieved and remotely cut off storage tank gas phase under accident, guarantees the safety of storage tank.At the same time, The invention also achieves various materials storage tank VOCs processing.
Description
Technical field
The present invention relates to normal pressure and low pressure storage tank volatile organic matter safe collection technical fields, and in particular to a kind of storage tank
VOCs safe collection method.
Background technique
The brings effluviums such as the solvent volatilization carried in the breathing of storage tank, the volatilization of Residual oil and shut-down pipeline purging and oil product
Body discharge, have become petroleum, petrochemical industry, chemical company's air pollution major source of pollutant, be plant area's volatile organic matter
(VOCs) one of main source.As country is to the pay attention to day by day of environmental protection, relevant laws and regulations standard is increasingly strict, to meet country
The requirement of laws and regulations, each Petrochemical Enterprises start large area and implement oil product storage system VOCs collection and harnessing project.
Currently, the storage tank VOCs administration way that enterprise uses is that multiple tank batterys are connected into one by gas phase communication line
It is whole to collect VOCs, and subsequent oil gas treating device is sent to by booster fan.Most common oil gas treating device is that oil gas returns
Receiving apparatus, but in Environmental Protection in China standard VOCs discharge index it is increasingly tighter, it is simple by promoting petroleum vapor recovery efficiency very
Hardly possible realizes the qualified discharge of storage tank VOCs.Therefore, VOCs is mostly introduced thermal oxidation furnace (TO), regenerative oxidation furnace (RTO), burnt by enterprise
It burns the open fires equipment such as furnace, heating furnace, pyrolysis furnace, catalyst regenerator and carries out burning disposal.But these open fire equipment are inherently
It is incendiary source, flame may travel to tank field along VOCs gathering line, cause great group's tank fire.At the same time, multiple storages
After tank connects into an entirety by gas phase connecting pipeline collection system, when fire occurs for a storage tank, flame can be along gas phase
Connecting pipeline travels to other storage tanks, there is the material risk that group's tank fire occurs.Gas phase is connected to tank group Frequent Accidents in recent years,
After the explosion of Nanjing petroleum chemical enterprise 6# tank, since each tank vapor delivery line is connected to, 7#, 8# tank occur to dodge quick-fried in succession.Ningbo chemical industry
Factory's incinerator air-introduced machine failure, process units fuel gas are flowed backward by tank field gas sampling pipe to each storage tank, and fire is caused.Cause
This, in order to meet the higher requirement that the environmental protection measure of high standard proposes safety, it would be highly desirable to it is organic to research and develop a kind of storage tank volatility
Object safe collection method solves the problems, such as that storage tank VOCs is administered, and has for the prevention gas phase connection great group's tank fire of tank group non-
Often important meaning.
Summary of the invention
The purpose of the invention is to overcome to exist in prior art storage tank VOCs improvement that great group's tank fire risk occurs
Safety problem, a kind of storage tank volatile organic matter safe collection method is provided.
To achieve the goals above, one aspect of the present invention provides a kind of storage tank VOCs safe collection method, including following step
It is rapid: the tank battery VOCs categorised collection of various materials, the storage tank VOCs connection processing of of the same race or similar material, the storage of various materials
The measure processing of nitrogen envelope, the stringent effort processing of tank group security control, the tank battery VOCs emission treatment of various materials.
Compared with prior art, the present invention has following beneficial effect:
(1) it is directly connected to the storage tank gas-phase space for storing of the same race or similar material, the big breathing of storage tank can be effectively reduced, is reduced
The discharge amount of VOCs is controlled in combination with pressure and pressure difference monitoring, is not only realized the VOCs processing of various materials storage tank, can also be kept away
Exempt from the larger material of storage properties difference different pressure of storage tank it is high simultaneously when, and exhaust valve opens simultaneously again, and material is caused mutually to alter,
Influence product quality.
(2) explosive ring is formed by the effectively control storage tank gas-phase space such as categorised collection, Control for Oxygen Content, nitrogen envelope measure
Border, reduces the risk that fire occurs for storage tank, avoids oil vapor treatment equipment gas of releasing from scurrying into storage in combination with quick action emergency valve
Can system.
(3) by the way that fire arrester is arranged on each storage tank gas phase branch line, it can prevent flame from traveling to along oil gas collection pipeline
Other storage tanks avoid the occurrence of great group's tank fire.
(4) storage tank gas phase is remotely cut off under facility realization accident by remotely cutting off.
Detailed description of the invention
Fig. 1 is the storage tank volatile organic matter safe collection process schematic representation of embodiment 1.
Description of symbols
1A/B- tank battery, 2- pressure of storage tank monitor, 3- oil gas branch pipe, the long-range stop valve of 4-, 5- oil gas branch pipe back-fire relief
Device, 6- valve, 7- tank group oil gas gathering tube pressure monitor, 8- exhaust valve, 9A/B- tank group oil gas gathering tube, 10- oil gas are total
Pipe, 11- oil gas manifold pressure monitor, 12- pressure difference monitor, 13- air-extractor, 14- air-extractor fire arrester, 15- are urgent
Stop valve, 16- oil vapor treatment equipment, 17- emergency decompression valve, 18- oxygen sensor, 19- breather valve, 20- nitrogen seal valve group, 21-
Oxygen measurement system, 22- nitrogen header pipe, 23- emergency stop push button.
Specific embodiment
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of storage tank VOCs safe collection methods, comprising the following steps: the tank battery of various materials
VOCs categorised collection, the storage tank VOCs connection processing of of the same race or similar material, the nitrogen envelope of the tank battery security control of various materials
Measure processing, stringent effort processing, the tank battery VOCs emission treatment of various materials.
The present invention seals the effectively control storage tank gas-phase space formation explosion jointly of measure, stringent effort by categorised collection, nitrogen
Property environment, reduce storage tank occur fire risk；The gas phase for handling multiple storage tanks of of the same race or similar material by connection is empty
Between, the other storage tanks for making the gas being discharged when storage tank rewinding be discharged simultaneously accommodate, to reduce storage tank volatile organic matter
Discharge.At the same time, the present invention realizes various materials storage tank VOCs processing.
According to the present invention, the tank battery VOCs categorised collection step of the various materials is to arrange the tank battery of various materials
The VOCs put carries out categorised collection by the oil gas branch pipe of every storage tank abhiseca, effectively controls storage tank gas-phase space and forms explosivity
Environment reduces the risk that fire occurs for storage tank.
According to the present invention, described of the same race or similar material storage tank VOCs connection processing step is by a plurality of of categorised collection
The VOCs of the tank discharge of of the same race or similar material is pooled to the tank group oil gas gathering tube of of the same race or similar oil gas in oil gas branch pipe
In carry out connection processing, can making the gas being discharged when storage tank rewinding, other storage tanks for being discharged accommodate simultaneously, to reduce storage
The discharge of tank volatile organic matter.
According to the present invention, it before the storage tank VOCs of of the same race or similar material is connected to processing step, also needs to arrange by back-fire relief
Processing is applied, the back-fire relief measure processing is one oil gas branch pipe fire arrester of setting on the oil gas branch pipe of every storage tank, can be effective
It prevents flame from propagating along connection pipe network, avoids the occurrence of great group's tank fire incident.Under preferable case, the oil gas branch pipe fire arrester
It is arranged close to tank deck gas phase exit, the oil gas branch pipe fire arrester is pipeline detonation type fire arrester.
In the present invention, in order to which oil gas branch pipe fire arrester overhauls conveniently, when further including that oil gas branch pipe fire arrester breaks down
Provided with maintenance prevention measure, the maintenance prevention measure is between oil gas branch pipe fire arrester and the connection of tank group oil gas gathering tube
Equipped with valve.
In the present invention, to effectively prevent flame to propagate along connection pipe network, great group's tank fire incident is avoided the occurrence of, is passed through
Storage tank gas phase is remotely cut off under long-range cutting facility realization accident.Processing is connected in the storage tank VOCs of of the same race or similar material
Before, it further include the cutting measure of remote tank gas phase, the remote tank gas phase cutting measure is in every storage tank and oil gas branch pipe
Pipeline between fire arrester is equipped with long-range stop valve, and is equipped with emergency stop push button in control room.
According to the present invention, the nitrogen envelope measure processing of the tank battery security control of the various materials is by every storage tank
Pressure of storage tank monitoring signals control nitrogen on every storage tank and seal opening or closing for valve group, and storage tank gas-phase space can be effectively controlled and formed
Explosive atmosphere reduces the risk that fire occurs for storage tank.
According to the present invention, it when pressure of storage tank monitors that pressure of storage tank reaches the cracking pressure setting value of nitrogen envelope valve group, opens
Nitrogen envelope valve group is opened, nitrogen header pipe mends nitrogen to storage tank, prevents storage tank negative pressure from entering air.
According to the present invention, it when pressure of storage tank monitors closing pressure set points of the pressure of storage tank lower than nitrogen envelope valve group, closes
Nitrogen envelope valve group is closed, nitrogen header pipe stops storage tank and mends nitrogen, effectively controls the safety of tank battery.
According to the present invention, the cracking pressure setting value of nitrogen envelope valve is 0.1-0.3kPa, for example, can for 0.1kPa,
The arbitrary value in range that any two in 0.15kPa, 0.2kPa, 0.25kPa, 0.3kPa and these point values are constituted,
The closing pressure set points of nitrogen envelope valve 7 are 0.4-0.8kPa, for example, can for 0.4kPa, 0.45kPa, 0.5kPa,
What any two in 0.55kPa, 0.6kPa, 0.65kPa, 0.7kPa, 0.75kPa, 0.8kPa and these point values were constituted
Arbitrary value in range.
Under preferable case, the cracking pressure setting value and the difference for closing pressure set points are not less than 0.3kPa.
In the present invention, in order to monitor and find that nitrogen envelope valve group breaks down in time, valve is sealed so as to on-call maintenance nitrogen.
It further include the safe handling measure for ensureing nitrogen envelope group, the safe handling measure is that every storage tank abhiseca is equipped with company in tank battery
The oxygen sensor for connecing oxygen measurement system controls oxygen measurement system alarm by oxygen sensor.
According to the present invention, when oxygen sensor detects that oxygen volume content is more than alarming value in VOCs exhaust, oxygen
Measuring system issues alarm, ensures the safe handling of nitrogen seal system in time.
Under preferable case, the alarming value of the oxygen volume content is 2-6%, for example, can for 2%, 3%, 4%,
5%, 6% and these point values in the range that is constituted of any two in arbitrary value.
According to the present invention, storage tank is equipped with emergency decompression valve or breather valve, when pressure of storage tank reaches or exceeds setting range,
Corresponding emergency decompression valve or breather valve automatically turn on, and further ensure storage tank safety.
According to the present invention, the tank battery VOCs emission treatment of the various materials is that the tank battery of more materials is discharged
VOCs is aggregated into oil gas general pipeline through tank group oil gas gathering tube respectively, is then set by the control pumping of oil gas manifold pressure monitoring signals
Standby to open, the processing of oil vapor treatment equipment is sent in pressurization, realizes that various materials storage tank VOCs processing, or control air-extractor are closed,
The processing of oil vapor treatment equipment is sent in stopping.
According to the present invention, when oil gas manifold pressure monitors that the total overpressure of oil gas reaches the setting of air-extractor cracking pressure
When value, air-extractor is opened, conveys VOCs to oil vapor treatment equipment, realizes various materials storage tank VOCs processing.
According to the present invention, when oil gas manifold pressure monitors that the total overpressure of oil gas reaches air-extractor and closes pressure setting
When value, air-extractor is closed, stops conveying VOCs to oil vapor treatment equipment, is effectively guaranteed the safe place material storage tank VOCs
Reason.
Under preferable case, the cracking pressure setting value of the air-extractor is 0.6-1.2kPa, the pass of the air-extractor
Closing pressure set points is gauge pressure 0-0.2kPa, and air-extractor cracking pressure and air-extractor close pressure difference >=0.3kPa.
According to the present invention, it for further application solutions various materials storage tank VOCs processing, is arranged in the tank battery of more materials
Before VOCs out is aggregated into oil gas general pipeline through tank group oil gas gathering tube respectively, also need to summarize by pressure of storage tank, tank group oil gas
The unlatching of exhaust valve on the monitoring signals co- controlling tank group oil gas gathering tube of pipe pressure and pressure difference, or pass through pressure of storage tank, tank
Group oil gas summarizes the closing of exhaust valve on the monitoring signals control tank group oil gas gathering tube of pipe pressure or pressure difference.
According to the present invention, when the pressure of storage tank of pressure of storage tank monitoring and the manifold pressure of tank group oil gas gathering tube pressure monitoring
When reaching the cracking pressure setting value of exhaust valve, and also needing to meet pressure difference >=0 before and after the exhaust valve of pressure difference monitoring, exhaust is opened
Valve, storage tank are vented to oil gas general pipeline, application solutions various materials storage tank VOCs processing.
According to the present invention, when the pressure of storage tank of pressure of storage tank monitoring or the manifold pressure of tank group oil gas gathering tube pressure monitoring
Lower than exhaust valve closing pressure set points when or pressure difference monitoring exhaust valve before and after pressure difference < 0 when, close exhaust valve, storage tank
Stop being vented to oil gas general pipeline, the safe handling of VOCs has been effectively ensured.
According to the present invention, the cracking pressure setting value < breather valve of the exhaust valve sets positive pressure × (1- breather valve superpressure
Value), for example, the cracking pressure setting value of exhaust valve is that breather valve sets positive pressure × (1- breather valve superpressure value) -0.1kPa；It is described
The closing pressure set points of exhaust valve > nitrogen envelope valve closing pressure set points.
The spark generated when in the present invention, to effectively prevent air-extractor to operate travels to storage tank system along connection pipe network
System, avoids the occurrence of great group's tank fire, further includes the back-fire relief measure processing of air-extractor, the back-fire relief measure processing is to be evacuated
It is respectively provided with an air-extractor fire arrester respectively on pipeline before and after equipment.
In the present invention, pressure refers both to gauge pressure.
The present invention will be described in detail by way of examples below.In following embodiment, oxygen concentration parameter passes through laser
Oxygen content monitoring method measures.
Embodiment 1
Such as Fig. 1, a kind of storage tank VOCs safe collection method, comprising the following steps:
The tank battery VOCs categorised collection step of various materials: the VOCs that the tank battery 1A/B of various materials is discharged passes through
The oil gas branch pipe 3 of every storage tank abhiseca carries out categorised collection.
The storage tank VOCs of of the same race or similar material is connected to processing step: will be multiple in a plurality of oil gas branch pipe 3 of categorised collection
The VOCs of the storage tank 1A discharge of of the same race or similar material, which is pooled in the tank group oil gas gathering tube 9A of of the same race or similar oil gas, to carry out
Connection processing, the VOCs that the tank battery 1B of material multiple of the same race or similar in a plurality of oil gas branch pipe 3 of categorised collection is discharged converge
Collect in the tank group oil gas gathering tube 9B of of the same race or similar oil gas and carries out connection processing.At the same time, in of the same race or similar material
Storage tank VOCs connection processing step before, also need to handle by back-fire relief measure, back-fire relief measure processing is in every storage tank
Oil gas branch pipe 3 on be arranged an oil gas branch pipe fire arrester 5 (pipeline detonation type fire arrester), be arranged close to tank deck gaseous phase outlet
Place.Maintenance prevention measure is provided with when breaking down including oil gas branch pipe fire arrester, the maintenance prevention measure is in oil gas branch
It is equipped with valve 6 between pipe fire arrester 5 and tank group oil gas gathering tube 9A/B connection, on-call maintenance oil gas branch can be convenient by valve
Pipe fire arrester.It further include the cutting measure of remote tank gas phase, institute before the storage tank VOCs connection processing of of the same race or similar material
Stating the cutting measure of remote tank gas phase is that long-range stop valve is equipped on pipeline between every storage tank and oil gas branch pipe fire arrester 5
4, and emergency stop push button 23 is equipped in control room.When fire occurs in a certain storage tank or pipeline, oil gas branch pipe fire arrester 5 can
To prevent flame to be passed to storage tank, and the long-range closing of stop valve 4 is controlled by controlling indoor emergency stop push button 23, cuts off gas phase
Circulation.
The nitrogen envelope measure processing of the tank battery security control of various materials: pass through pressure of storage tank monitor 2 on every storage tank
Monitoring signals control nitrogen on every storage tank and seal opening or closing for valve group 20, and storage tank gas-phase space can be effectively controlled and form explosivity
Environment reduces the risk that fire occurs for storage tank.
When pressure of storage tank monitor 2 monitors that pressure of storage tank reaches the cracking pressure setting value of nitrogen envelope valve group 20, open
Nitrogen seals valve group 20, and nitrogen header pipe 22 mends nitrogen to storage tank, prevents storage tank negative pressure from entering air.
When pressure of storage tank monitor 2 monitors closing pressure set points of the pressure of storage tank lower than nitrogen envelope valve group 20, close
Nitrogen seals valve group 20, and nitrogen header pipe 22 stops storage tank and mends nitrogen, effectively controls the safety of tank battery.
Wherein, the cracking pressure setting value of the nitrogen envelope valve group 20 is 0.2kPa, the closing pressure of the nitrogen envelope valve group 20
Setting value is 0.5kPa.
It further include the safe handling measure for ensureing nitrogen envelope group, the safe handling measure is that every storage tank fills in tank battery
Top is equipped with the oxygen sensor 18 of connection oxygen measurement system 21, controls oxygen measurement system 21 by oxygen sensor 18 and reports
It is alert.
When oxygen sensor 18 detects that oxygen volume content is more than alarming value in VOCs exhaust, oxygen measurement system 21
Alarm is issued, ensures the safe handling of nitrogen seal system in time.
Wherein, the alarming value of the oxygen volume content is 6%.
The stringent effort of the tank battery security control of various materials are handled: passing through pressure of storage tank monitor 2 on every storage tank
Monitoring signals control the unlatching of emergency decompression valve 17 or breather valve 18, further ensure storage tank safety.
When pressure of storage tank reaches 1.5kPa, valve is exhaled to open in breather valve 18, it is tight when pressure of storage tank reaches 1.8kPa
Anxious relief valve 17 is opened, and when pressure of storage tank is lower than -0.4kPa, the suction valve in breather valve 18 is opened.
The tank battery VOCs emission treatment of various materials: the VOCs that the tank battery 1A/B of more materials is discharged is respectively through tank group
Oil gas gathering tube 9A/B is aggregated into oil gas general pipeline 10, then controls air-extractor 13 by 11 monitoring signals of oil gas manifold pressure device
It opens, the processing of oil vapor treatment equipment 16 is sent in pressurization, realizes that various materials storage tank VOCs processing, or control air-extractor 13 are closed
It closes, the processing of oil vapor treatment equipment 16 is sent in stopping.
It is set when oil gas manifold pressure monitor 11 monitors in oil gas general pipeline 10 that pressure reaches 13 cracking pressure of air-extractor
When definite value, air-extractor 13 is opened, conveys VOCs to oil vapor treatment equipment 16, realize various materials storage tank VOCs processing.
When oil gas manifold pressure monitor 11 monitors that pressure reaches air-extractor closing pressure setting in oil gas general pipeline 10
When value, air-extractor 13 is closed, stops conveying VOCs to oil vapor treatment equipment 16, is effectively guaranteed material storage tank VOCs safety
Processing.
Wherein, the cracking pressure setting value of the air-extractor 13 is 0.9kPa, the closing pressure of the air-extractor 13
Setting value is 0kPa, and air-extractor cracking pressure and air-extractor close pressure difference and be not less than 0.3kPa.
Before the VOCs that the tank battery of more materials is discharged is aggregated into oil gas general pipeline through tank group oil gas gathering tube respectively, also need
Pass through the monitoring signals co- controlling tank group of pressure of storage tank device 2, tank group oil gas gathering tube pressure monitor 7 and pressure difference monitor 12
The unlatching of exhaust valve 8 on oil gas gathering tube 7, or pass through pressure of storage tank device 2, tank group oil gas gathering tube pressure monitor 7 or pressure difference
The closing of exhaust valve 8 on the monitoring signals control tank group oil gas gathering tube 7 of monitor 12.
When the manifold pressure of pressure of storage tank device 2 pressure of storage tank monitored and the monitoring of tank group oil gas gathering tube pressure monitor 7
When reaching the cracking pressure setting value of exhaust valve 8, and also needing to meet pressure difference before and after exhaust valve >=0, exhaust valve 8, storage tank are opened
It is vented to oil gas general pipeline 10, application solutions various materials storage tank VOCs processing.
When the pressure of storage tank monitored of pressure of storage tank device 2 or the manifold pressure of the monitoring of tank group oil gas gathering tube pressure monitor 7
Lower than exhaust valve 8 closing pressure set points when or exhaust valve before and after pressure difference < 0 when, close exhaust valve 8, storage tank stops to oil
Gas general pipeline 10 is vented, and the safe handling of VOCs has been effectively ensured.
Wherein, the cracking pressure setting value of the exhaust valve is that breather valve sets positive pressure × (1- breather valve superpressure value)-
0.1kPa, closing pressure set points > nitrogen envelope valve closing pressure set points of the exhaust valve.
It further include the back-fire relief measure processing of air-extractor, back-fire relief measure processing is before and after the air-extractor on pipeline point
It is not respectively provided with an air-extractor fire arrester 14.
The method of embodiment 1 not only realizes the VOCs processing of various materials storage tank, can also effectively reduce the discharge amount of VOCs,
It significantly reduces simultaneously and remotely cuts off storage tank gas phase under the risk and realization accident of storage tank generation fire, also achieve equipment
Facilitate maintenance when failure.
Embodiment 2
According to the method for embodiment 1, unlike: not taking the safe handling measure of nitrogen envelope group.
The method of embodiment 2 not only realizes the VOCs processing of various materials storage tank, can also effectively reduce the discharge amount of VOCs,
It significantly reduces simultaneously and remotely cuts off storage tank gas phase under the risk and realization accident of storage tank generation fire.
Embodiment 3
According to the method for embodiment 1, unlike: the back-fire relief measure of air-extractor not being taken to handle.The side of embodiment 1
Method not only realizes the VOCs processing of various materials storage tank, can also effectively reduce the discharge amount of VOCs, while reducing storage tank
Storage tank gas phase is remotely cut off under the risk and realization accident of fire, facilitates maintenance when also achieving equipment fault.
Embodiment 4
According to the method for embodiment 1, unlike: remote tank gas phase not being taken to cut off measure.The method of embodiment 1
The VOCs processing for not only realizing various materials storage tank, can also effectively reduce the discharge amount of VOCs, while reducing storage tank and fire occurs
The risk of calamity and while realizing equipment fault, facilitate maintenance.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In skill of the invention
In art conception range, can with various simple variants of the technical solution of the present invention are made, including each technical characteristic with it is any its
Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, is belonged to
Protection scope of the present invention.
Claims (13)
1. a kind of storage tank VOCs safe collection method, which comprises the following steps: the tank battery VOCs of various materials points
Class is collected, the storage tank VOCs connection processing of of the same race or similar material, at the nitrogen envelope measure of the tank battery security control of various materials
Reason, stringent effort processing, the tank battery VOCs emission treatment of various materials.
2. storage tank VOCs safe collection method according to claim 1, which is characterized in that it is characterized in that, described a variety of
The tank battery VOCs categorised collection step of material is that the VOCs for discharging the tank battery of various materials passes through every storage tank abhiseca
Oil gas branch pipe carries out categorised collection.
3. storage tank VOCs safe collection method according to claim 1, which is characterized in that described of the same race or similar material
Storage tank VOCs connection processing step is the tank discharge of of the same race or similar material in a plurality of oil gas branch pipe by categorised collection
VOCs is pooled in the tank group oil gas gathering tube of of the same race or similar oil gas and carries out connection processing.
4. storage tank VOCs safe collection method according to claim 3, which is characterized in that in the storage of of the same race or similar material
Tank VOCs is connected to before processing step, also needs to handle by back-fire relief measure, and the back-fire relief measure processing is the oil in every storage tank
One oil gas branch pipe fire arrester is set on gas branch pipe；
Preferably, the oil gas branch pipe fire arrester is arranged close to tank deck gas phase exit；
Preferably, the oil gas branch pipe fire arrester is pipeline detonation type fire arrester.
5. storage tank VOCs safe collection method according to claim 4, which is characterized in that further include oil gas branch pipe fire arrester
When breaking down, it is provided with maintenance prevention measure；
The maintenance prevention measure is to be equipped with valve between oil gas branch pipe fire arrester and the connection of tank group oil gas gathering tube.
6. storage tank VOCs safe collection method according to claim 3, which is characterized in that in the storage of of the same race or similar material
It further include the cutting measure of remote tank gas phase before tank VOCs connection processing；
Preferably, the remote tank gas phase cutting measure is set on the pipeline between every storage tank and oil gas branch pipe fire arrester
There is long-range stop valve, and is equipped with emergency stop push button in control room.
7. storage tank VOCs safe collection method according to claim 1, which is characterized in that the tank battery of the various materials
The nitrogen envelope measure processing of security control is to control nitrogen on every storage tank by pressure of storage tank monitoring signals on every storage tank to seal valve group
Open or close；
Preferably, it when pressure of storage tank monitors that pressure of storage tank reaches the cracking pressure setting value of nitrogen envelope valve group, opens nitrogen and seals valve
Group, nitrogen header pipe mend nitrogen to storage tank；
When pressure of storage tank monitors closing pressure set points of the pressure of storage tank lower than nitrogen envelope valve group, closes nitrogen and seal valve group, nitrogen
General pipeline stops storage tank and mends nitrogen；
Preferably, the cracking pressure setting value of the nitrogen envelope valve group is 0.1-0.3kPa, and the closing pressure of the nitrogen envelope valve group is set
Definite value is 0.4-0.8kPa；
Preferably, the cracking pressure setting value and the difference for closing pressure set points are not less than 0.3kPa.
8. storage tank VOCs safe collection method according to claim 1 or claim 7, which is characterized in that further include ensureing nitrogen envelope group
Safe handling measure, the safe handling measure is that every storage tank abhiseca is equipped with connection oxygen measurement system in tank battery
Oxygen sensor controls oxygen measurement system alarm by oxygen sensor；
Preferably, when oxygen sensor detects that oxygen volume content is more than alarming value in VOCs exhaust, oxygen measurement system
Issue alarm；
Preferably, the alarming value of the oxygen volume content is 2-6%.
9. storage tank VOCs safe collection method according to claim 1, which is characterized in that the tank battery safety of various materials
The stringent effort processing of control is when every pressure of storage tank reaches setting value, and emergency decompression valve or breather valve automatically open.
10. storage tank VOCs safe collection method according to claim 1, which is characterized in that the storage tank of the various materials
Group VOCs emission treatment is that the VOCs that the tank battery of more materials is discharged is aggregated into oil gas general pipeline through tank group oil gas gathering tube respectively,
Then it controls air-extractor by oil gas manifold pressure monitoring signals to open, the processing of oil vapor treatment equipment, or control are sent in pressurization
Air-extractor is closed, and the processing of oil vapor treatment equipment is sent in stopping.
11. storage tank VOCs safe collection method according to claim 10, which is characterized in that when oil gas manifold pressure monitors
When reaching air-extractor cracking pressure setting value to the total overpressure of oil gas, air-extractor is opened, is conveyed to oil vapor treatment equipment
VOCs；
When oil gas manifold pressure monitors that the total overpressure of oil gas reaches air-extractor closing pressure set points, closes pumping and set
It is standby, stop conveying VOCs to oil vapor treatment equipment；
Preferably, the cracking pressure setting value of the air-extractor is 0.6-1.2kPa, and the closing pressure of the air-extractor is set
Definite value is 0-0.2kPa.
Preferably, air-extractor cracking pressure and air-extractor close pressure difference >=0.3kPa.
12. storage tank VOCs safe collection method according to claim 10, which is characterized in that arranged in the tank battery of more materials
Before VOCs out is aggregated into oil gas general pipeline through tank group oil gas gathering tube respectively, also need to summarize by pressure of storage tank, tank group oil gas
The unlatching of exhaust valve on the monitoring signals co- controlling tank group oil gas gathering tube of pipe pressure and pressure difference, or pass through pressure of storage tank, tank
Group oil gas summarizes the closing of exhaust valve on the monitoring signals control tank group oil gas gathering tube of pipe pressure or pressure difference；
Preferably, when the pressure of storage tank of pressure of storage tank monitoring and the manifold pressure of tank group oil gas gathering tube pressure monitoring reach row
The cracking pressure setting value of air valve, and when also needing to meet pressure difference >=0 before and after the exhaust valve of pressure difference monitoring, open exhaust valve, storage tank
It is vented to oil gas general pipeline；
When the pressure of storage tank of pressure of storage tank monitoring or the manifold pressure of tank group oil gas gathering tube pressure monitoring are lower than the pass of exhaust valve
When closing pressure set points or before and after the exhaust valve of pressure difference monitoring when pressure difference < 0, exhaust valve is closed, storage tank stops to oil gas general pipeline
Exhaust；
Preferably, the cracking pressure setting value < breather valve of the exhaust valve sets positive pressure × (1- breather valve superpressure value), described
The closing pressure set points of exhaust valve > nitrogen envelope valve closing pressure set points.
13. storage tank VOCs safe collection method according to claim 10, which is characterized in that further include the resistance of air-extractor
Fiery measure processing, the back-fire relief measure processing are to be respectively provided with an air-extractor back-fire relief respectively on pipeline before and after the air-extractor
Device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112429418A (en) * | 2020-11-04 | 2021-03-02 | 中国石油天然气集团有限公司 | Treatment system for volatile organic compounds in storage tank |
| CN114955287A (en) * | 2021-02-26 | 2022-08-30 | 中国石油天然气集团有限公司 | Volatile organic compound collecting system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106241099A (en) * | 2016-07-28 | 2016-12-21 | 中国石油集团东北炼化工程有限公司吉林设计院 | Storage tank volatile organic matter recovery system |
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2018
- 2018-02-13 CN CN201810148560.XA patent/CN110155551A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106241099A (en) * | 2016-07-28 | 2016-12-21 | 中国石油集团东北炼化工程有限公司吉林设计院 | Storage tank volatile organic matter recovery system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112429418A (en) * | 2020-11-04 | 2021-03-02 | 中国石油天然气集团有限公司 | Treatment system for volatile organic compounds in storage tank |
| CN112429418B (en) * | 2020-11-04 | 2023-02-24 | 中国石油天然气集团有限公司 | Treatment system for volatile organic compounds in storage tank |
| CN114955287A (en) * | 2021-02-26 | 2022-08-30 | 中国石油天然气集团有限公司 | Volatile organic compound collecting system |
| CN114955287B (en) * | 2021-02-26 | 2024-05-28 | 中国石油天然气集团有限公司 | Volatile organic compound collecting system |
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