CN210457456U - Oil gas recovery online monitoring device - Google Patents
Oil gas recovery online monitoring device Download PDFInfo
- Publication number
- CN210457456U CN210457456U CN201921001013.5U CN201921001013U CN210457456U CN 210457456 U CN210457456 U CN 210457456U CN 201921001013 U CN201921001013 U CN 201921001013U CN 210457456 U CN210457456 U CN 210457456U
- Authority
- CN
- China
- Prior art keywords
- gas
- oil
- vacuum pump
- oiling machine
- gas recovery
- 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.)
- Active
Links
Images
Landscapes
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The utility model belongs to the technical field of vapor recovery system, a vapor recovery system online monitoring device is related to. The utility model discloses combine the actual operation condition who refuels the scene, propose the transformation scheme based on the tanker aircraft parking stall, regard as a set of with the nozzle of tanker aircraft homonymy, all gas circuit of group merge into same vacuum pump entry jointly, return back in the vapor recovery system jar district through gas flowmeter. The system configuration is carried out by taking the oil feeder parking stall as a unit, so that the hardware cost of system transformation is reduced, the requirement on transformation space is reduced, and the service efficiency of equipment is improved.
Description
Technical Field
The utility model belongs to the technical field of vapor recovery system, a vapor recovery system online monitoring device is related to.
Background
In recent years, with the rapid development of economy in China, the air pollution in China is becoming more serious due to the use of a large amount of fossil energy. Haze is a trouble in life of people, Volatile Organic Compounds (VOCs) are one of haze component particles, are a general name of all organic compounds discharged into air in a gaseous molecular form at room temperature, have strong toxicity, and influence the atmospheric combined pollution of nationwide regions.
As a large country of global manufacturing industry, China has the annual discharge amount of VOCs up to more than 3000 million tons, and is at the top of the world, the discharge amount of VOCs is in a rapid growth state, and the influence on regional composite air pollution is large, so that the monitoring and the treatment of VOCs are urgent.
In order to comprehensively enhance the monitoring and treatment of Volatile Organic Compounds (VOCs) and improve the air quality, documents such as a working scheme for preventing and treating thirteen-five volatile organic compound pollution, a plan for action of reducing volatile organic compounds in key industries, a comprehensive working scheme for energy conservation and emission reduction, a working guideline for evaluating an online monitoring system of the VOCs in the air, a monitoring scheme for monitoring environmental air volatile organic compounds in key areas in 2018 and the like are successively provided in China. The scheme makes detailed regulations on VOCs monitoring cities, monitoring projects, time frequency, operation regulations and the like. In order to play a blue sky defense war, VOCs monitoring and emission improvement work is strengthened all over the country. At present, 17 provinces such as Beijing, Shanghai and the like have acquired VOCs pollution discharge cost, and cities such as Shanghai, Tianjin, Shenzhen and the like require on-line monitoring.
The gasoline station is used as an important industry for gasoline storage, transportation and sale, and oil gas volatilized in the processes of gasoline filling, gasoline unloading and storage is a key object for emission control. In order to respond to the national blue sky guard plan and relevant environmental regulations, a gas station oil gas recovery online monitoring system with remote monitoring and control is developed for a gas station and a Beijing far east instrument limited company, so that the online monitoring and control of the gas station oil gas recovery process and the emission concentration are realized, the oil gas emission is reduced, and the pollution to the air is reduced.
The traditional oil gas recovery scheme is composed of a controller, a vacuum pump and the like, namely, the vacuum pump (which can be an NP pump) which controls the rotating speed through frequency is additionally arranged on an air return pipeline at the bottom of the oiling machine to provide power for a gas loop of a refueling gun, and after an encoder pulse signal of the refueling gun is read by an oil gas recovery controller, the output frequency of the vacuum pump is synchronously adjusted (usually proportional adjustment) through methods such as frequency tracking and the like, so that the gas-liquid ratio can be controlled within a certain range.
The existing oil gas recovery on-line monitoring scheme is as follows: in the traditional oil gas recovery scheme, a gas flowmeter is added to realize oil gas volume metering, a vacuum pump and a gas flowmeter are independently configured for each oil gun, the vacuum pump is used for recovering oil gas, the gas flowmeter (generally, a vortex flow meter) installed in a negative pressure region is used for metering the oil gas, and an indoor industrial personal computer of a gas station completes calculation and display of gas-liquid ratio, as shown in fig. 1. The above prior art has the following disadvantages:
1. the prior art does not combine the actual operation condition of a gas station at all, proposes a scheme that 1 vacuum pump and 1 gas flowmeter are required to be configured independently for each fuel gun, records the contents in the recommended standard, and has the problems of serious textbook idea and serious waste of resource over-configuration.
2. The vortex shedding flowmeter is required to be used in the prior art, is limited by the use specification of the vortex shedding flowmeter, can only be arranged on the side surface of the oiling machine, and can only meet the requirement of the length of front and rear straight pipe sections, so that the vortex shedding flowmeter can only be arranged in a negative pressure area of a gas pipeline.
3. The oil gas recovery controller that uses among the prior art scheme all is foreign oil gas recovery control basically, and it uses the proportion regulation mode to carry out manual adjustment, drops into the operation after qualified, belongs to open loop control, can not guarantee stability, and after operation a period, just need reset oil gas recovery controller, could guarantee that the gas-liquid ratio is up to standard.
In the technical scheme of the prior art, an online monitoring oil gas recovery closed-loop control system and method (patent publication number: CN109305653A) also exist, and the brief description principle is as follows:
the oil gas recovery oil gun is connected to the oiling machine through an oil filling pipe and a gas return pipe, a flow valve is connected to the oil filling pipe in series, a suction pump (namely a vacuum pump) is connected to the gas return pipe in series, a gas flow meter is arranged on the gas return pipe, all control circuits and signals are connected to a processor, and the processor controls the suction pump through PWM signals, as shown in figure 2. When the gas-liquid ratio is between 1.0 and 1.2, PWM is maintained; when the gas-liquid ratio is greater than 1.2, the PWM is rapidly reduced, and when the gas-liquid ratio is less than 1.0, the PWM is rapidly improved. The above prior art has the following disadvantages:
although the number of the flow meters used is not explicitly indicated in the technical scheme, the technical scheme is designed along the conventional idea, 1 fuel nozzle uses 1 flow meter and 1 vacuum pump, and the problem of resource over-allocation is not obvious from the practical point of view.
Some of the terms used in this patent are as follows:
1. oil gas: volatile organic compounds (other than methane total hydrocarbons) produced during filling, unloading and storage of gasoline at a gasoline station.
2. Gas-liquid ratio: the ratio of the volume of the recovered oil gas to the volume of the synchronous oil filling during oil filling.
SUMMERY OF THE UTILITY MODEL
The utility model discloses combine the actual conditions of filling station's operation, will use the nozzle to carry out the scheme of equipment configuration as the unit, upgrade to the equipment configuration scheme that uses the tanker aircraft parking stall as the unit, utilize oil gas recovery controller, with encoder, gas flowmeter, NP pump driver is whole inserts oil gas recovery controller, form closed loop control system, read tanker aircraft encoder signal and gas flowmeter signal simultaneously, calculate the flow value that corresponds, obtain true gas-liquid ratio, the control frequency of vacuum pump is adjusted to the size through gas-liquid ratio. Compare with 1 the scheme that the nozzle just used 1 flowmeter and vacuum pump, the utility model discloses reduced the requirement of hardware configuration and space transformation, greatly practiced thrift the transformation cost, reduced the work of artificial participation and later stage periodic adjustment, improved the possibility of practicality and popularization, concrete technical scheme as follows.
The utility model provides an online monitoring device of vapor recovery system, online monitoring device of vapor recovery system arranges in filling station, online monitoring device of vapor recovery system includes: the system comprises an oil gas recovery tank (located in an oil gas recovery tank area, referred to as a recovery tank for short), an oil gas recovery controller, a vacuum pump, a gas flowmeter and a vacuum pump driver;
arranging a plurality of oiling machines and oil gas recovery tanks in the gas station;
for each oiling machine, an oil gas recovery controller is arranged;
each oiling machine corresponds to a plurality of oiling machine parking spaces; each oiling machine parking space (oiling parking space) is provided with a plurality of oiling guns connected with the oiling machine;
for each oiling machine parking space, arranging a vacuum pump, a gas flow meter and a vacuum pump driver;
a plurality of refueling guns of each refueling machine parking space are connected with the vacuum pump of the corresponding refueling machine parking space;
the vacuum pump of each oiling machine parking space is connected with the gas flow meter and the vacuum pump driver of the corresponding oiling machine parking space;
gas flow meters in the gas stations are all connected with the oil gas recovery tank;
the vacuum pump driver and the gas flow meter of each oiling machine parking space are connected with the oil-gas recovery controller of the corresponding oiling machine;
the oil gun of each oiling machine is connected with the oil-gas recovery controller of each oiling machine.
On the basis of the technical scheme, two oiling machine parking spaces are arranged beside each oiling machine.
On the basis of the technical scheme, the vacuum pump is an NP pump.
On the basis of the technical scheme, a safety barrier is arranged between the gas flowmeter and the oil gas recovery controller.
On the basis of the technical scheme, the gas flowmeter is a gas waist wheel flowmeter.
The utility model has the advantages of as follows:
the utility model discloses combined the on-the-spot operational aspect of actual refueling, proposed the transformation scheme based on the parking stall that refuels, regard as a set of with the nozzle of tanker aircraft homonymy, all gas circuit of group merge into same vacuum pump entry jointly, return back to in the vapor recovery jar district through gas flowmeter. The utility model discloses abandoned open-loop control such as traditional frequency tracking algorithm, used the closed-loop control thought, with real-time gas-liquid ratio as the feedback quantity, the control frequency of adjustment vacuum pump carries out the gas-liquid ratio adjustment to refuel the parking stall and carry out the system configuration as the unit, reduced the hardware cost that the system was reformed transform, reduced the requirement in transformation space, improved the availability factor of equipment.
Drawings
The utility model discloses there is following figure:
FIG. 1 is a schematic block diagram of an online monitoring structure for oil gas recovery in the prior art;
FIG. 2 is a schematic block diagram of an online monitoring oil-gas recovery closed-loop control system in the prior art;
FIG. 3 is a schematic block diagram of a part of the structure of the present invention;
FIG. 4 is a block diagram of the second embodiment of the present invention;
fig. 5 is a schematic block diagram of a part of the structure after the safety fence is added.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 3 and 4, the utility model discloses combine the fact of filling station's actual operation, will use the nozzle to carry out equipment configuration's scheme as the unit, upgrade to the equipment configuration scheme that uses the tanker aircraft parking stall as the unit, utilize oil gas recovery controller, with the encoder of nozzle, gas flowmeter (being called for shortly the flowmeter), NP pump driver (a vacuum pump driver, being called for shortly the driver) whole access control forms closed-loop control system, read tanker aircraft encoder signal and gas flowmeter signal simultaneously, calculate corresponding flow value, obtain true gas-liquid ratio, the control frequency of vacuum pump is adjusted to size through the gas-liquid ratio. Compare with 1 the scheme that the nozzle just used 1 flowmeter and vacuum pump, the utility model discloses reduced the requirement that hardware configuration and space were reformed transform, greatly practiced thrift the transformation cost, reduced the work of artificial participation and later stage periodic adjustment, improved the possibility of practicality and popularization.
Most oiling machines are two-sided guns, and only two oiling parking spaces are provided, namely, at most 2 oiling guns work when the oiling machine works normally, so that each oiling machine can be transformed by configuring 2 vacuum pumps and 2 flow meters at most.
The utility model discloses use the tanker aircraft parking stall to carry out equipment configuration as the unit, for every tanker aircraft (no matter 2, 4 guns or 6 rifle bolts) configuration 2 gas flowmeter and 2 vacuum pumps, can realize vapor recovery system on-line monitoring and control function. The following description will take the most common 4-gun fuel dispenser as an example.
1. The gas loop of the oiling machine is reformed, the gas loops of the oiling guns on the same side (the same oiling parking space) are connected in parallel, and the gas loops are connected to the inlets of the same flowmeter and the same vacuum pump; as shown in FIG. 3, the gas circuits of the fuel guns 1 and 2 corresponding to the left refueling truck space are merged into the vacuum pump 1 and then enter the flow meter 1, and the other side is operated.
2. Signals of an encoder of the oil gun and signals of a gas flowmeter are connected into an oil-gas recovery controller, a safety barrier is added to protect the site when necessary, and pulse output signals of the oil-gas recovery controller are connected to an NP pump driver, as shown in figure 5;
3. when any one side of the refueling parking space arrives, the equipment on the corresponding side of the system enters a working state, and a refueling gun is provided at will and occupies the vacuum pump and the flow meter independently. When a left-side vehicle comes and the oil gun 1 is used, oil gas recovered by the oil gun 1 is extracted by the vacuum pump 1 and returns to an oil gas recovery tank area (a recovery tank is arranged in the oil gas recovery tank area) through a gas flowmeter (abbreviated as a flowmeter) 1; when the oil gun 2 is used, oil gas recovered by the oil gun 2 is extracted by the vacuum pump 1 and returns to a recovery tank through the gas flowmeter 1; because the oil gun 1 and the oil gun 2 share one oil filling machine parking space and cannot be used simultaneously, the utilization rate of system equipment is improved.
4. The oil gas recovery controller can detect multiple oiling signals, and for the oiling signals on the same side, the same pulse output interface is used for controlling the NP pump. And the oil gas recovery controller sends a corresponding driving pulse signal to the driver to drive the vacuum pump when receiving the oil gun signal, the vacuum pump starts to work to extract oil gas in the oil gun gas loop, and the oil gas enters the oil gas recovery tank through the gas flowmeter, so that a feedback control system is formed.
5. The oil gas recovery controller calculates the corresponding oil filling amount, oil gas recovery amount, oil filling speed and gas return speed through pulse signals of an oil filling gun and a flowmeter to obtain a gas-liquid ratio and a speed ratio (gas-liquid ratio). The speed ratio is: the ratio of the current gas flow rate and the fueling flow rate. Through gas-liquid ratio size and speed ratio, adjust the operating frequency of vacuum pump for the gas-liquid ratio satisfies the control requirement, reaches the purpose of oil gas recovery on-line monitoring and control. When the gas-liquid ratio is less than 1.0, the working frequency of the vacuum pump is improved; when the gas-liquid ratio is between 1.0 and 1.2, if the speed ratio is also between 1.0 and 1.2, the adjustment is not carried out, otherwise, the working frequency of the vacuum pump is adjusted according to the speed ratio of 1.1 times; and when the gas-liquid ratio is larger than 1.2, the working frequency of the vacuum pump is reduced.
In order to avoid the situation that the operation frequency of the vacuum pump is adjusted too frequently, the operation frequency of the vacuum pump is not controlled when the oiling flow is too small (within 5L, for example), the operation frequency is directly output at a certain preset working frequency (50 Hz, the value can be dynamically updated), when the oiling flow is more than 5L, the gas-liquid ratio is adjusted, in order to ensure that the flow speed is relatively stable, the adjustment period (namely, the period for calculating and judging the gas-liquid ratio once to perform corresponding adjustment control) is not set too small, in the scheme, the setting period is 2s, namely, the output of the vacuum pump is judged and adjusted once every 2 seconds.
The utility model discloses a technical key point with want the guard point as follows:
the improved scheme using the oiling machine parking stall as a unit uses the oiling gun at the same side, and uses the same vacuum pump and the gas flowmeter to measure, so that the improvement cost is saved. The gas-liquid ratio is adjusted by using closed-loop control and dynamically adjusting the control frequency of the vacuum pump, so that the system realizes the control function on the premise of monitoring.
The above embodiments are only used for illustrating the present invention, and not for limiting the present invention, and those skilled in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention is defined by the claims.
Those not described in detail in this specification are within the knowledge of those skilled in the art.
Claims (5)
1. The utility model provides an online monitoring device of vapor recovery system which characterized in that, online monitoring device of vapor recovery system arranges in filling station, online monitoring device of vapor recovery system includes: the system comprises an oil gas recovery tank, an oil gas recovery controller, a vacuum pump, a gas flowmeter and a vacuum pump driver;
arranging a plurality of oiling machines and oil gas recovery tanks in the gas station;
for each oiling machine, an oil gas recovery controller is arranged;
each oiling machine corresponds to a plurality of oiling machine parking spaces; each oiling machine parking space is provided with a plurality of oiling guns connected with the oiling machine;
for each oiling machine parking space, arranging a vacuum pump, a gas flow meter and a vacuum pump driver;
a plurality of refueling guns of each refueling machine parking space are connected with the vacuum pump of the corresponding refueling machine parking space;
the vacuum pump of each oiling machine parking space is connected with the gas flow meter and the vacuum pump driver of the corresponding oiling machine parking space;
gas flow meters in the gas stations are all connected with the oil gas recovery tank;
the vacuum pump driver and the gas flow meter of each oiling machine parking space are connected with the oil-gas recovery controller of the corresponding oiling machine;
the oil gun of each oiling machine is connected with the oil-gas recovery controller of each oiling machine.
2. The online monitoring device for oil and gas recovery of claim 1, characterized in that: and each oiling machine is corresponding to two oiling machine parking spaces.
3. The online monitoring device for oil and gas recovery of claim 1, characterized in that: the vacuum pump is an NP pump.
4. The online monitoring device for oil and gas recovery of claim 1, characterized in that: and a safety barrier is arranged between the gas flowmeter and the oil gas recovery controller.
5. The online monitoring device for oil and gas recovery of claim 4, characterized in that: the gas flowmeter is a gas waist wheel flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921001013.5U CN210457456U (en) | 2019-06-28 | 2019-06-28 | Oil gas recovery online monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921001013.5U CN210457456U (en) | 2019-06-28 | 2019-06-28 | Oil gas recovery online monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210457456U true CN210457456U (en) | 2020-05-05 |
Family
ID=70442823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921001013.5U Active CN210457456U (en) | 2019-06-28 | 2019-06-28 | Oil gas recovery online monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210457456U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390221A (en) * | 2020-12-14 | 2021-02-23 | 郑州市广正电子有限公司 | Oil gas recovery online detection embedded integrated pressure compensation vortex shedding flowmeter of oiling machine |
-
2019
- 2019-06-28 CN CN201921001013.5U patent/CN210457456U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390221A (en) * | 2020-12-14 | 2021-02-23 | 郑州市广正电子有限公司 | Oil gas recovery online detection embedded integrated pressure compensation vortex shedding flowmeter of oiling machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102200220B (en) | Liquefied natural gas (LNG) filling station | |
| CN106039915B (en) | Device for recovering oil and gas and its recovery method | |
| CN105090738B (en) | Multi-functional natural gas and hydrogen mixing gas station and filling method | |
| CN202246026U (en) | Refueling and oil gas recovery system for gas station | |
| CN101746508A (en) | Decompressing fuel-oil floor washing device and method | |
| CN210457456U (en) | Oil gas recovery online monitoring device | |
| CN208295529U (en) | Three line list rifles of one kind add hydrogen machine | |
| CN105089856A (en) | Self-sufficient type internal combustion engine gas fuel supply system and gas packet pressure control method | |
| CN105090739A (en) | Multifunctional intelligent scattered natural gas recovery device and method thereof | |
| CN210656133U (en) | Oil gas recovery on-line monitoring device | |
| CN210656132U (en) | Oil gas recovery on-line monitoring device | |
| CN210457455U (en) | Oil gas recovery online monitoring device | |
| CN102425725B (en) | System and method for reclaiming boil off gas (BOG) in liquefied natural gas (LNG) storage tank | |
| CN203763888U (en) | Dual-channel evaporation technology type oil gas recovery system | |
| CN116685921A (en) | System and method for optimizing a petroleum distribution system | |
| CN101767652A (en) | Fuel washing device for aircraft refueling vehicle | |
| CN103272401A (en) | Membrane and condensation combined oil-gas recovery system | |
| CN203065026U (en) | Tire crane for supplying power by employing liquefied natural gas (LNG) gas set | |
| CN202327654U (en) | System for recycling boil-off gas (BOG) in liquefied natural gas (LNG) storage tank | |
| CN106397293A (en) | Device and method for recycling and purifying N-methylpyrrolidone gas | |
| CN218130988U (en) | Oil gas recovery device | |
| CN213569518U (en) | Gas station oil gas recovery on-line monitoring system with gas-liquid ratio closed-loop control function | |
| CN102221126B (en) | Small household intelligent natural gas filling station | |
| CN205065273U (en) | Scattered gas of multi -functional natural gas intelligence recovery unit | |
| CN202092395U (en) | Low-pressure steam jet water absorption type refrigeration device with self-control function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |