摘要:
A vent system for a fuel storage tank and a pressure vacuum valve (PVV) module (110) for use with such a vent system are disclosed. The vent system defines a vent path (30) from the fuel storage tank (10) to atmosphere, comprising an elongate vent pipe (33) which extends vertically to a rain cap (300) located at the upper end of the vent pipe, and a pressure vacuum valve (PVV) (130) located in the vent path between the lower end of the vent pipe (33) and the tank (10). The pressure vacuum valve (130) maintains the vent path in a closed condition unless the pressure in the tank is above or below a predetermined pressure. By separating the PVV from the rain cap and placing it between the lower end of the vent pipe and the tank, it is possible to site the PVV at an accessible level for maintenance. The PVV (130) is located in a PVV module (110). The vent path deviates from the axis of the vent pipe to the pressure vacuum valve which is located in the module (110), in a position offset from the vent pipe axis. The module also includes an auto shut-off valve (120) and a condensate collector.
摘要:
A hose includes a fluorothermoplastic tube layer, a nitrile rubber friction layer disposed over the tube layer, a reinforcement layer disposed over the friction layer, the reinforcement layer comprising braided steel wire, and a cover layer disposed over the reinforcing layer, where the cover layer may comprise chlorinated polyethylene. The tube layer defines a lumen in the hose, and a vapor return line may further be disposed within the lumen of the hose. Hose embodiments of the disclosure may be useful in fueling applications for vehicles using fuels such as gasoline, gasohol, diesel, biodiesel, avgas or jet fuel.
摘要:
A refueling station including an aboveground fuel storage tank configured to dispense fuel by gravity rather than electricity. The storage tank may comprise multiple compartments to store different types of fuel. The storage tank is configured to receive vapor recovery displaced by the dispensed fuel. The storage tank may be stackable and may be transported to a remote facility to process the recovered vapor.
摘要:
A fuel storage system is provided comprising at least one storage tank (12), an air exhaust port (14), a first filter assembly, a primary pump, a least one secondary pump, at least one additional filter assembly, and an additional secondary pump. The first filter assembly comprises a filter input port, a fuel vapor duct, a primary filter output port, and a secondary filter output port. The filter input port is coupled to a fluid vent port (20). The fuel vapor duct defines a flow path extending from the filter input port to a primary filter output port. The primary filter output port is coupled to a pollutant return port (22). The secondary filter output port is partitioned from the fuel vapor duct by an air-permeable partition. The primary pump is positioned to cause fluid to pass from the filter input port to the primary filter output port. The secondary pump(s) is/are positioned to cause the air component within the fuel vapor duct to pass through the air-permeable partition to the secondary filter output port. The additional filter input port is coupled to the secondary filter port. The additional secondary filter output port is coupled to the air exhaust port. The additional secondary pump is coupled to the additional filter assembly and is positioned to cause the air component within the additional fuel vapor duct to pass through an additional air-permeable partition to the exhaust port.
摘要:
A method is described for the preconditioning of an adsorbent, such as activated carbon, prior to charging the adsorbent into a reaction vessel of a vapor recovery system. The method includes the steps of (1) treating the adsorbent in order to establish in the adsorbent a residual heel of vapor of the type to be subsequently adsorbed in vapor recovery processing and (2) adding the treated and, therefore, preconditioned adsorbent to the reaction vessel of the vapor recovery system. In this way vapor recovery system downtime is significantly reduced.
摘要:
The invention concerns a method and device for separating a vapour/gas mixture formed above a liquid in a tank (2), the mixture being led out of the tank through a discharge line (16) to reduce the excess pressure. The vapour/gas mixture is discharged from the tank (2) by passing it through at least one membrane unit (29) with at least one membrane (13), on the permeate side (19) of which an underpressure is generated at least at intervals by at least one pump (20), and the permeate enriched in vapour is fed back into the tank (2). The vapour-poor fraction retained by the membrane is discharged to the atmosphere (6) through the discharge line (16).
摘要:
A process for reclaiming and recycling gasoline vapor that collects in the headspace (27) of gasoline storage tanks (11) at retail service stations comprises sealing the tank against ingress of atmospheric gases, introducing a selected inert gas into the storage tank as the liquid gasoline is extracted therefrom to establish an inert gas/gasoline vapor mixture in the headspace (27) of the storage tank (11), periodically recovering the inert gas/gasoline vapor mixture from the storage tank, and processing the recovered mixture to condense the gasoline vapor to liquid gasoline, wich is removed for subsequent use.
摘要:
An attitude sensing arrangement for triggering a shutoff mechanism on a fuel dispensing nozzle 18 comprising a rolling element 86 placed inside a non-cylindrical chamber 84 that is sealed with a plug 88 such that the rolling element 86 may move freely inside the chamber 84. A vacuum sensing path 76 passes from a sensing port 74 in the nozzle spout 72, through a vacuum sensing tube 70, into the non-cylindrical chamber 84, and into a venturi-generated vacuum chamber 68. The attitude sensing arrangement is configured such that the rolling element 86 blocks a shutoff port 92 in the non-cylindrical chamber 84 when the nozzle 18 is raised past a certain shutoff angle. When the vacuum sensing path 76 is blocked by the rolling element 86 in this manner, the shutoff mechanism closes the main fuel valve 48.
摘要:
System and method for treating cargo vapors from crude oil and petroleum products tanks (2) to generate electrical power. The system and method comprising the steps: separating the cargo vapors into liquid volatile organic compounds (LVOC) and compressed surplus gas in a VOC recovery plant (1). Providing a gas turbine (6) having a compressor (7), a combustion chamber (8) and an expander (9). Feeding the compressed surplus gas to the combustion chamber (8). Feeding the liquid volatile organic compounds (LVOC) to the combustion chamber (8) as pilot fuel. Feeding air to the compressor (7) operated by the expander (9), where feeding the compressed air to the combustion chamber (8) is reduced proportionally to the feeding of the surplus gas, and combusting the compressed air, surplus gas and the liquid volatile organic compounds (LVOC) in the combustion chamber (8) and using the combustion for operating a generator (12) with the gas turbine (6) to generate electrical power.