CN203359965U - Device for mechanical and centralized secondary recovery of oil gas - Google Patents
Device for mechanical and centralized secondary recovery of oil gas Download PDFInfo
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- CN203359965U CN203359965U CN 201320352024 CN201320352024U CN203359965U CN 203359965 U CN203359965 U CN 203359965U CN 201320352024 CN201320352024 CN 201320352024 CN 201320352024 U CN201320352024 U CN 201320352024U CN 203359965 U CN203359965 U CN 203359965U
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- gas
- oil gas
- vacuum pump
- mechanical
- secondary recovery
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Abstract
The utility model discloses a device for mechanical and centralized secondary recovery of oil gas. The device for mechanical and centralized secondary recovery of the oil gas is provided with a main variable frequency vacuum pump, wherein the variable frequency vacuum pump is connected with a gas-phase pipe of each oiling machine through a branch pipeline, a decompression valve is arranged on an inlet of the variable frequency vacuum pump, a gas outlet of the variable frequency vacuum pump is connected with an oil tank through a gas return pipe, and an intake vacuum detection sensor is arranged on each branch pipeline. According to the device for mechanical and centralized secondary recovery of the oil gas, secondary recovery of the oil gas is achieved in the mechanical and centralized mode, working conditions of the oiling machines can be detected automatically, and the vacuum degree of the gas inlet can be detected; the vacuum degree of the gas inlet can be stabilized on a set value through variable frequency adjustment of the rotating speed of the vacuum pump, flow of recovered oil gas can be guaranteed, and vapor liquid ratio requirements are met. The device for mechanical and centralized secondary recovery of the oil gas has the advantages that the structure is simple, performance is reliable, and rapid transformation and installation of a filling station can be achieved conveniently. Due to the fact that the device has no requirements for the space inside the oiling machine, the device for mechanical and centralized secondary recovery of the oil gas is suitable for being used for oil gas recovery of all kinds of oiling machines.
Description
Technical field
The utility model relates to a kind of bunkering facilities, particularly the centralized secondary oil gas recycling and processing device of a kind of petrol service station machinery.
Background technology
Gasoline is a kind of highly volatile liquid, in air, can produce inflammable and explosive petrol gas due to the volatility of itself.Especially petrol service station gasoline unload and refueling process in volatile oil tolerance larger, will directly not produce the waste of gasoline resource if do not do recycling, this phenomenon is particularly evident when summer temp is higher.The oil gas of volatilization also can and exist potential safety hazard to the environment outside the interior station of standing.Along with China strengthens gradually to the attention degree of environmental protection, and the enforcement of " petrol service station atmosphere pollutants emission standards " (GB 20952--2007), the petrol service station of not doing the oil gas recovery will face huge ambient pressure.Petrol service station is in operation process, and the volatilization of oil gas not only brings dense oil gas flavor, but also can foul air.Along with the continuous expansion of China's petrol service station quantity size, the use of fuel charger is increasing, and the oil vapour pollution problem of fuel charger draws attention day by day.The oil gas of volatilization is flammable explosive gas, to petrol service station and ambient environment, is a fire safety evaluating hidden danger, and especially, at the petrol service station of personnel compact district, the oil gas of volatilization is tantamount to the killer of a stealth, all likely causes at any time personnel's property damage.Therefore, it is imperative that newly-built petrol service station increases the gas recovery system for oil design, old petrol service station carries out the gas recovery system for oil Design & reform.Gas station oil gas reclaims, and has four large economic and social benefits: environmental protection, safety, health, energy-conservation.At present, China is faced with the dual-pressure of environment and resource, and the Party Central Committee and State Council explicitly call for the energy-saving economy of development, builds a conservation-minded society, saving and rationally utilizing hydrocarbon resources to be placed on more outstanding position.Under this background, the importance that gas station oil gas reclaims will highlight more.
Summary of the invention
The technical problems to be solved in the utility model is for the deficiencies in the prior art, has proposed the centralized secondary oil gas recycling and processing device of a kind of machinery simple in structure, dependable performance.
The technical problems to be solved in the utility model is achieved through the following technical solutions, the centralized secondary oil gas recycling and processing device of a kind of machinery, be characterized in: be provided with a total frequency conversion vacuum pump, the frequency conversion vacuum pump joins by the gas phase pipe of branch line and each fuel charger, blowdown valve is equipped with in the inflow point of frequency conversion vacuum pump, the air extractor duct of frequency conversion vacuum pump joins by muffler and oil tank, and the intake vacuum detecting sensor all is housed on each branch line.
The utility model compared with prior art, adopts that machinery is centralized carries out the secondary oil gas recovery, and this device can detect the fuel charger mode of operation automatically, when fuel charger having been detected and put the gun refueling, starts oil-gas recovery vacuum pump, detects the degree of vacuum of admission port simultaneously.The vacustat that rotating speed by the variable frequency adjustment vacuum pump makes admission port, in setting value (constant voltage control), to guarantee to reclaim the flow of oil gas, meets the gas liquid ratio requirement.Its advantage is: only need a vacuum pump, mechanical control method is without change fuel charger circuit.Simple in structure, dependable performance, brought convenience to quick transformation and the installation of petrol service station.Space in fuel charger is not required, and the oil gas that is applicable to all types fuel charger reclaims transformation.The working speed of centralized vacuum pump system changes according to the oiling flow, thus not to be operated under the full speed running state, so energy-saving effect is obvious, and increased the service life of whole system.
The accompanying drawing explanation
Fig. 1 is structure diagram of the present utility model.
The specific embodiment
The centralized secondary oil gas recycling and processing device of a kind of machinery, be provided with a total frequency conversion vacuum pump, the frequency conversion vacuum pump joins by the gas phase pipe of branch line and each fuel charger, blowdown valve is equipped with in the inflow point of frequency conversion vacuum pump, the air extractor duct of frequency conversion vacuum pump joins by muffler and oil tank, and the intake vacuum detecting sensor all is housed on each branch line.
As shown in the figure: 1, with the nozzle of gas ratio control cock, 2, Pull breaking ualve, 3, oil separator, 4, the frequency conversion vacuum pump, 5, controller, 6, breathing valve, 7, oil tank.
Oil/Gas Recovery Technology for Gas Station, at present once, secondary, three recovery minute.Once reclaim and refer to truck tanker to petrol service station oil depot emptying the time, reclaim the oil gas ejected from oil tank simultaneously.Secondary recovery refers to while refueling to automotive oil tank with nozzle, reclaim the oil gas of discharging simultaneously from fuel tank.Three recovery generally refer at oil depot and install back receiving apparatus, the oil gas of first and second recovery are processed to exhaust emissions, oil product liquefaction.
If the self-priming pump fuel charger utilizes current transformer to respond to the phase current of self-priming pump, when oil gun refuels, the self-priming pump electric current can increase, current transformer induction electricity flow valuve, and start-up circuit is judged as fueling state according to current value, starts vacuum pump.
If the submersible pump fuel charger, except utilizing current transformer sense judgement fuel charger fueling state to start vacuum pump, can also utilize the current trigger intermediate relay of submersible pump motor to be used as starting the signal of vacuum pump.
The software protection measure: the PLC control system has the triple protection function: power system emergency protection, pressure detecting system fail safe, pipe leakage protection.
A, power system protection: when power system breaks down; as burn-down of electric motor, pump seizure, voltage instability (comprising decompression, overvoltage), frequency converter faults itself; at this moment frequency converter feeds back to the alerting signal meeting Triggering Control System operation of break vacuum pump at once of control system; and send alarm, avoid causing danger.
B, pressure detecting system fail safe: after the vacuum system running; system can judge the pressure data of pressure transformer feedback; if pressure sensor lost efficacy; when feedback data is zero; the operation of system outage vacuum pump; and send alarm, the power system of avoiding the mistake because of pressure data to cause is out of control.
C, pipe leakage protection: the maximum exhaust capacity of vacuum pump system is fixed; using when coupling, it must operate in self designed capacity scope (during the maximum speed of motor; now frequency converter is output as 50Hz); when system runs to the 50Hz certain hour and does not also reach the steady pressure point that constant voltage controls; system thinks that leakage (being airtight not tight problem) has appearred in pipeline; the now system operation of break vacuum pump at once, and send alarm.
Pressure pipeline length compensation function:
In order to maintain stable gas liquid ratio, need to maintain stable pressure at oil gun admission port place; But, when reality is used, in order to connect up conveniently, pressure sensor is not placed on oil gun admission port place, but has been placed on each branch line, near the admission port place of vacuum pump; Like this when gas flow due to the existence of vapour lock, deviation appears in the pressure that must cause the pressure of oil gun inflow point and sensor to detect.This deviation is that the flow velocity due to the length of pipeline and gas causes, system is for making up this deviation, duct length and free air capacity coefficient are incorporated in the constant voltage control algorithm, realization with the variation of duct length and free air capacity to the constant pressure point correction, thereby realize that the pressure at oil gun admission port place remains stable.Single rifle and the multiple gun gas liquid ratio of having avoided so similar import and homemade goods to reflect can produce the problem of skew.
Claims (1)
1. the centralized secondary oil gas recycling and processing device of machinery, it is characterized in that: be provided with a total frequency conversion vacuum pump, the frequency conversion vacuum pump joins by the gas phase pipe of branch line and each fuel charger, blowdown valve is equipped with in the inflow point of frequency conversion vacuum pump, the air extractor duct of frequency conversion vacuum pump joins by muffler and oil tank, and the intake vacuum detecting sensor all is housed on each branch line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320352024 CN203359965U (en) | 2013-06-19 | 2013-06-19 | Device for mechanical and centralized secondary recovery of oil gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320352024 CN203359965U (en) | 2013-06-19 | 2013-06-19 | Device for mechanical and centralized secondary recovery of oil gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203359965U true CN203359965U (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320352024 Expired - Lifetime CN203359965U (en) | 2013-06-19 | 2013-06-19 | Device for mechanical and centralized secondary recovery of oil gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN203359965U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314584A (en) * | 2014-08-05 | 2016-02-10 | 蒋京 | Vapor-liquid ratio control system for refueling oil vapor recovery |
| CN105480927A (en) * | 2015-12-17 | 2016-04-13 | 合肥创博信息科技有限公司 | Automatic monitoring device for oil gas recovery |
-
2013
- 2013-06-19 CN CN 201320352024 patent/CN203359965U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314584A (en) * | 2014-08-05 | 2016-02-10 | 蒋京 | Vapor-liquid ratio control system for refueling oil vapor recovery |
| CN105480927A (en) * | 2015-12-17 | 2016-04-13 | 合肥创博信息科技有限公司 | Automatic monitoring device for oil gas recovery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |