CN105110284A - Vehicle-mounted oil-gas recovery and refueling oil-gas recovery adaptation method based on vacuum degree monitoring - Google Patents
Vehicle-mounted oil-gas recovery and refueling oil-gas recovery adaptation method based on vacuum degree monitoring Download PDFInfo
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- CN105110284A CN105110284A CN201510496086.6A CN201510496086A CN105110284A CN 105110284 A CN105110284 A CN 105110284A CN 201510496086 A CN201510496086 A CN 201510496086A CN 105110284 A CN105110284 A CN 105110284A
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Abstract
The invention relates to a vehicle-mounted oil-gas recovery and refueling oil-gas recovery adaptation method based on vacuum degree monitoring. By the adoption of the method, the problem that a vehicle-mounted oil-gas recovery system and a refueling oil-gas recovery system are not compatible when used in the prior art is mainly solved. According to the adopted vehicle-mounted oil-gas recovery and refueling oil-gas recovery adaptation method based on vacuum degree monitoring , an oil-gas recovery pipeline in a refueling machine is provided with an adjusting valve, a vacuum meter, an oil-gas recovery pump and a flow meter; output signals of the vacuum meter and the flow meter are connected to an analog quantity input terminal of a controller through signal lines; a refueling pulse terminal on a main board of the refueling machine sends out a refueling pulse signal in direct proportion to refueling flow during refueling; the refueling pulse signal is connected with a pulse input terminal of the controller through a signal line; an output terminal of the controller is connected with the adjusting valve through a signal line. The problems are well solved through the technical scheme, and the method can be used in refueling of a gasoline station.
Description
Technical field
The present invention relates to a kind of vehicle-mounted petroleum vapor recovery based on vacuum-degree monitoring and refuel petroleum vapor recovery adaptation method.
Background technology
In recent years, domestic automobile pollution constantly increases fast, and the consumption of finished oil also increases rapidly thereupon.Because the light component in finished oil has stronger volatility, gasoline transport, unload, in the link such as sale, all can volatilize more product vapour.These product vapours are volatile organic compound (volatileorganiccompounds, referred to as VOC), are to cause PM2.5 to exceed standard and one of the main reason of haze weather.In addition, due to the inflammable and explosive characteristic of product vapour, the discharge of product vapour also can constitute a threat to the safe operation of petrol service station.In order to effectively control the product vapour pollutants to airborne release in the daily production process of petrol service station, namely China promulgated GB20952-2007 " petrol service station atmosphere pollutants emission standards " in 2007, require that various places petrol service station should complete the retrofit work of petroleum vapor recovery within the regulation time limit.
So-called petroleum vapor recovery, refers to a kind of method that the product vapour being refueled by gasoline and volatilize in emptying process carries out airtight collection.With regard to petrol service station, mainly comprise the petroleum vapor recovery in two stages:
(1) petroleum vapor recovery of first stage is also referred to as emptying petroleum vapor recovery, refers to truck tanker in petrol service station buried tank during emptying, by the oil-gas closed process collected in truck tanker in buried tank.Truck tanker, after emptying, will be taken back oil storage these product vapours collected, further recycle.
(2) petroleum vapor recovery of subordinate phase is also referred to as oiling petroleum vapor recovery, refer to automobile when refueling, oil-gas recovery vacuum pump auxiliary under, by equipment such as petroleum vapor recovery nozzle, coaxial oil gas recovery rubber tubes the gasoline vapor in automotive oil tank is drawn into the process in the sunken tankers of petrol service station.Namely the volume at every turn adding the oil gas steam of oil obtd is called gas liquid ratio with the ratio adding oil volume, in order to make the pressure in sunken tankers keep balance, usually all specifies that gas liquid ratio is at about 1:1, namely often adds 1 liter of oil, namely returns the gas of about 1 liter.
At present, the petrol service station of China's most area has progressively completed gas station oil gas and has reclaimed transformation, but due to problems such as equipment coupling, parameter drift, relatively high fault rates, the efficiency of the oiling gas recovery system for oil of petrol service station is poor, limited in one's ability to the recovery of oil gas.According to the investigation of Environmental Protection Agency, the highest organic efficiency of oiling gas recovery system for oil is about 86%.
So-called vehicle-mounted petroleum vapor recovery, refers to and forms transport pipe sealing system at automotive interior, and utilize vehicle-mounted canister to adsorb the oil gas volatilized from fuel tank in refueling process, the air after purification will be discharged in air; When driving engine is in running order, the vacuum that recycling driving engine produces carries out desorb to vehicle-mounted canister, is extracted out by oil gas and enter a kind of oil-gas recovery method that driving engine uses as fuel from active carbon.
Compared with traditional oiling gas recovery system for oil, vehicle-mounted petroleum vapor recovery has:
(1) lower cost, the fringe cost of the installation canister of bicycle is about 100 yuan, and can also therefore save certain fuel cost every year.
(2) higher organic efficiency, the organic efficiency of vehicle-mounted gas recovery system for oil can reach more than 98% usually, far above the peak efficiency of current oiling gas recovery system for oil 86%.
(3) technique is simple, lower fault rate.Vehicle-mounted petroleum vapor recovery principle is simple, only carry out simple transformation on the original basis, be different from oiling gas recovery system for oil, multiple equipment such as normal need of work vacuum pump, coaxial sebific duct, gas-oil separation joint, gas liquid ratio control cock, nozzle carry out matched well.
Just because of this, Environmental Protection in America is deployed on will phase out oiling gas recovery system for oil with regard to starting in the area of vehicle-mounted petroleum vapor recovery widespread use the end of the year 2006, and progressively force in by the end of June, 2012 to cancel oiling gas recovery system for oil.
In China, vehicle-mounted gas recovery system for oil will substitute now widely used oiling gas recovery system for oil with its various advantages in future.But the U.S. is recovered to the completely alternative gas recovery system for oil that refuels from the vehicle-mounted oil gas of popularization and has used the time of nearly about 15 years.During this period, because vehicle-mounted petroleum vapor recovery and the use simultaneously of oiling gas recovery system for oil can cause incompatibility, therefore must develop suitable vehicle-mounted petroleum vapor recovery and refuel petroleum vapor recovery adaptation method.
The widely used vacuum assist of vehicle-mounted petroleum vapor recovery and current China refuels the incompatibility of petroleum vapor recovery and is mainly reflected in: vehicle-mounted gas recovery system for oil self just carries out closed processes to fuel tank oil gas, when outside petroleum vapor recovery nozzle and reservoir port airtight good, oiling oil-gas recovery vacuum pump can be caused can to take out without gas, thus near reservoir port, form higher degree of vacuum, make vacuum pump load excessive; When petroleum vapor recovery nozzle and reservoir port airtight bad time, what oiling petroleum vapor recovery then can be caused to draw back is almost air, specifying to refuel the gas liquid ratio of petroleum vapor recovery due to the existing petroleum vapor recovery standard of China is 1.0 ~ 1.2, thus cause the fresh air of excessive gas to be sent back to storage tank, break original oil gas volatilization to balance each other, the volatilization of gasoline in storage tank can have been accelerated.Along with constantly carrying out of refueling process, excess air also can form pressure-fired in tank inside, and the oil gas carrying new volatilization is discharged by the breathing valve of storage tank.Therefore, use vehicle-mounted petroleum vapor recovery simultaneously and refuel petroleum vapor recovery and not only can have an impact to refueling oil-gas recovery vacuum pump, and easily cause the generation of incompatible excessive emissions, make the reduction of petroleum vapor recovery efficiency.
The present invention solves this problem targetedly.
Summary of the invention
Technical matters to be solved by this invention is that in prior art, vehicle-mounted petroleum vapor recovery uses incompatible, that petroleum vapor recovery efficiency is lower problem with oiling gas recovery system for oil simultaneously, provides a kind of vehicle-mounted petroleum vapor recovery based on vacuum-degree monitoring newly and refuels petroleum vapor recovery adaptation method.The method has the advantage compatible good, petroleum vapor recovery efficiency is higher.
For solving the problem, the technical solution used in the present invention is as follows: a kind of vehicle-mounted petroleum vapor recovery based on vacuum-degree monitoring and oiling petroleum vapor recovery adaptation method, control cock is provided with at the petroleum vapor recovery pipeline of fuel charger inside, vacuum indicator, petroleum vapor recovery pump, flow counter, the output signal of vacuum indicator and flow counter is connected on the analog input terminal of controller by signal wire (SW), oiling pulse terminal on mainboard of oiling machine can send when refueling and refuel the oiling impulse singla that flow is directly proportional, the impulse singla that refuels is connected with the Puled input terminal of controller by signal wire (SW), the lead-out terminal of controller is connected with control cock by signal wire (SW), the oil gas flow signal of the oiling flow signal drawn based on oiling pulse and flow counter feedback adjusts control valve opening in real time, detect vehicle-mounted petroleum vapor recovery is installed time, gas liquid ratio is remained on and is less than in the scope of 1.0, avoid air excess to suck oil tank and the incompatible discharge that causes, when the vehicle-mounted petroleum vapor recovery of installation not detected, gas liquid ratio is remained in 1.0 ~ 1.2 scopes of national Specification.
In technique scheme, preferably, described control cock is arranged on the pipeline before petroleum vapor recovery pump.
In technique scheme, preferably, described petroleum vapor recovery pump is vacuum pump.
In technique scheme, preferably, described vacuum indicator is arranged on the pipeline before control cock.
In technique scheme, preferably, described flow counter is arranged on the pipeline after petroleum vapor recovery pump.
In technique scheme, preferably, according to the type of control cock, adopt the aperture of current control or pulse width modulation controlled control cock.
The present invention proposes a kind of vehicle-mounted petroleum vapor recovery based on vacuum-degree monitoring and refuel petroleum vapor recovery adaptation method, effectively can solve vehicular oil gas and reclaim the incompatibility problem with oiling petroleum vapor recovery, detect vehicle-mounted petroleum vapor recovery is installed time, the oil gas flow signal of the oiling flow signal drawn based on oiling pulse and flow counter feedback adjusts control valve opening in real time, gas liquid ratio is remained on and is less than in the scope of 1.0, avoid air excess to suck oil tank and the incompatible discharge that causes; When the vehicle-mounted petroleum vapor recovery of installation not detected, the oil gas flow signal of the oiling flow signal drawn based on oiling pulse and flow counter feedback adjusts control valve opening in real time, and gas liquid ratio is remained in 1.0 ~ 1.2 scopes of national Specification.Therefore, the application of the invention, not only effectively can solve the incompatibility problem of vehicle-mounted petroleum vapor recovery and oiling petroleum vapor recovery, avoid incompatible discharge, and gas liquid ratio can be regulated in real time to remain in 1.0 ~ 1.2 scopes of national Specification when vehicle-mounted petroleum vapor recovery not detected, promote the normal organic efficiency used when refueling petroleum vapor recovery, achieve good technique effect.
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
Detailed description of the invention
[embodiment 1]
The vehicle-mounted petroleum vapor recovery based on vacuum-degree monitoring of the present invention's design is formed primarily of parts such as controller, control cock, vacuum indicator, flow counter with oiling petroleum vapor recovery adaptation method.
Wherein, control cock is arranged on the petroleum vapor recovery pipeline of fuel charger inside, usually can be arranged on the pipeline before oil-gas recovery vacuum pump, is used for regulating refueling the return-air flow of petroleum vapor recovery.When implementing, adopt the EPV10 type electronic type petroleum vapor recovery gas liquid ratio control cock that the control of light of spring intelligence is produced.
Vacuum indicator is arranged on the petroleum vapor recovery pipeline of fuel charger inside equally, before should being arranged at control cock, is used for detecting in real time the degree of vacuum of petroleum vapor recovery pipeline between nozzle to control cock.When implementing, adopt the MPM489 vacuum transducer of Shaanxi Mike.
Flow counter is installed on the petroleum vapor recovery pipeline of fuel charger inside equally, and the installation requirement that particular location can refer to flow counter is determined, usually can be installed on the pipeline after oil-gas recovery vacuum pump.When implementing, adopt the LLQZ-25AW type Roots type flowmeter that Cangnan, Wenzhou produces.
Controller is control core of the present invention, is used for realizing the Real-time Collection to vacuum indicator, flow counter, oiling pulse, and according to internal processes control and regulation valve opening.When implementing, conventional industrial control unit (ICU) can be adopted, as industrial computer, programmable logic controller (PLC) etc.
The output signal of vacuum indicator, flow counter can adopt the current signal of standard, and is connected on the analog input terminal of controller.The impulse singla that refuels is positioned on mainboard of oiling machine, and when there being client to refuel, the pulse terminal of refueling can send and refuel the oiling impulse singla that flow is directly proportional, and this signal can be accessed by the Puled input terminal of controller.Control cock can be accessed by the lead-out terminal of controller, according to the type of control cock, current control or PWM (pulse duration modulation) can be adopted to control aperture.
When client refuels, nozzle is inserted in reservoir port, on nozzle with envelope gas hood cover on reservoir port, play sealing function.After oiling starts, after oiling starts, oiling petroleum vapor recovery pump in fuel charger also can start to start, if added vehicle does not have vehicle-mounted petroleum vapor recovery, then nozzle is directly connected with the gas-phase space in fuel tank, the oil gas ratio now sucked due to the oil product that adds and gas recovery system for oil is approximately 1:1, makes the degree of vacuum of the petroleum vapor recovery pipeline between nozzle to control cock close to atmospheric pressure state.When controller perceives after oiling starts by refueling impulse singla, constantly can read the numerical value of vacuum indicator, if current vacuum level is less than vehicle-mounted petroleum vapor recovery judge degree of vacuum, then think that added vehicle is not installed vehicular oil gas and reclaimed, controller can calculate oiling flow according to oiling pulsimeter, and the aperture of control cock is adjusted in real time according to the oil gas flow signal that oiling flow and flow counter return, gas liquid ratio is in the normal range of 1.0 ~ 1.2.
Otherwise, if added vehicle is with vehicle-mounted petroleum vapor recovery, then due to the leakproofness of vehicle-mounted gas recovery system for oil self, the gas recovery system for oil that refuels cannot suck the oil gas in fuel tank, now, when oiling starts, under the effect of envelope gas hood, petroleum vapor recovery pipeline between nozzle and control cock is by airtight for formation one good container, and along with oiling petroleum vapor recovery pump brings into operation, this depot siding will keep higher degree of vacuum.When controlling to find that the numerical value of vacuum indicator is greater than vehicle-mounted petroleum vapor recovery judgement degree of vacuum in system, just think that vehicle-mounted petroleum vapor recovery installed by this vehicle, just oiling flow can be calculated according to oiling pulsimeter, and the aperture of control cock is adjusted in real time according to the oil gas flow signal that oiling flow and flow counter return, gas liquid ratio is remained on be less than in the scope of 1.0, thus the excessive incompatible discharge avoided vehicle-mounted petroleum vapor recovery to use with oiling petroleum vapor recovery simultaneously and bring.
[comparative example]
At present, the oiling gas recovery system for oil used within the scope of China is vacuum assist, and when using with the vehicle-mounted gas recovery system for oil of ORVR, incompatibility problem is comparatively outstanding simultaneously.Its incompatibility is mainly reflected in: vehicle-mounted gas recovery system for oil self just carries out closed processes to fuel tank oil gas, when outside petroleum vapor recovery nozzle and reservoir port airtight good, oiling oil-gas recovery vacuum pump can be caused can to take out without gas, thus near reservoir port, form higher degree of vacuum, make vacuum pump load excessive, lifetime; When petroleum vapor recovery nozzle and reservoir port airtight bad time, what oiling petroleum vapor recovery then can be caused to draw back is all almost air, specifying to refuel the gas liquid ratio of petroleum vapor recovery due to the existing petroleum vapor recovery standard of China is 1.0 ~ 1.2, thus cause the fresh air of excessive gas to be sent back to storage tank, break original oil gas volatilization to balance each other, the volatilization of gasoline in storage tank can have been accelerated.Along with constantly carrying out of refueling process, excess gas is known from experience at tank inside formation pressure-fired, and the oil gas carrying new volatilization is discharged by the breathing valve of storage tank.Therefore, use vehicle-mounted petroleum vapor recovery simultaneously and refuel petroleum vapor recovery and not only can have an impact to refueling oil-gas recovery vacuum pump, and easily cause the generation of incompatible excessive emissions, make the reduction of petroleum vapor recovery efficiency.According to the investigational data of U.S. EPA, use vacuum assist and vehicle-mounted gas recovery system for oil that bunkering facilities overall recovery can be caused to decline 1% ~ 10% simultaneously.
Obviously, if use method provided by the present invention, when the fuel charger of lift-launch vacuum assist oiling gas recovery system for oil is the group refueling carrying vehicle-mounted gas recovery system for oil, the gas liquid ratio automatically turning down recovery can be realized, thus avoid excessive air be inhaled into storage tank aggravation oil gas volatilization and be finally discharged into air from breathing valve, provide effective guarantee for refueling the efficiency of petroleum vapor recovery.
Claims (6)
1. the vehicle-mounted petroleum vapor recovery based on vacuum-degree monitoring and oiling petroleum vapor recovery adaptation method, control cock is provided with at the petroleum vapor recovery pipeline of fuel charger inside, vacuum indicator, petroleum vapor recovery pump, flow counter, the output signal of vacuum indicator and flow counter is connected on the analog input terminal of controller by signal wire (SW), oiling pulse terminal on mainboard of oiling machine can send when refueling and refuel the oiling impulse singla that flow is directly proportional, the impulse singla that refuels is connected with the Puled input terminal of controller by signal wire (SW), the lead-out terminal of controller is connected with control cock by signal wire (SW), the oil gas flow signal of the oiling flow signal drawn based on oiling pulse and flow counter feedback adjusts control valve opening in real time, detect vehicle-mounted petroleum vapor recovery is installed time, gas liquid ratio is remained on and is less than in the scope of 1.0, when the vehicle-mounted petroleum vapor recovery of installation not detected, gas liquid ratio is remained in 1.0 ~ 1.2 scopes of national Specification.
2. according to claim 1 based on vacuum-degree monitoring vehicle-mounted petroleum vapor recovery with refuel petroleum vapor recovery adaptation method, it is characterized in that described control cock be arranged on petroleum vapor recovery pump before pipeline on.
3., according to claim 1 based on vehicle-mounted petroleum vapor recovery and the oiling petroleum vapor recovery adaptation method of vacuum-degree monitoring, it is characterized in that described petroleum vapor recovery pump is vacuum pump.
4. according to claim 1 based on vacuum-degree monitoring vehicle-mounted petroleum vapor recovery with refuel petroleum vapor recovery adaptation method, it is characterized in that described vacuum indicator be arranged on control cock before pipeline on.
5. according to claim 1 based on vacuum-degree monitoring vehicle-mounted petroleum vapor recovery with refuel petroleum vapor recovery adaptation method, it is characterized in that described flow counter be arranged on petroleum vapor recovery pump after pipeline on.
6., according to claim 1 based on vehicle-mounted petroleum vapor recovery and the oiling petroleum vapor recovery adaptation method of vacuum-degree monitoring, it is characterized in that the type according to control cock, adopt the aperture of current control or pulse width modulation controlled control cock.
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