Filling station for liquefied hydrocarbon gases

 

(57) Abstract:

Filling station consists of a vessel and connective communication with the sealed annular space, and equipment for pressure control. The space between the walls of the vessel and communications filled with inert gas with pressure PATM<Pwhere RATM- atmospheric pressure, P is the pressure in the annular space, Rslave- pressure in the vessel. Each segment communications limited at the ends of the flanges or couplings: deaf or control channels. Wafer or coupling gap through the channels connected to the annular space communications. At the ends of the section of the communications set the lens compensators. The use of the invention will apply effective protection against leakage of liquefied hydrocarbon gases. 1 C.p. f-crystals, 2 Il.

The invention relates to the field of storage and refuelling of vehicles and household gas liquefied petroleum gases (LPG).

Known gas station company West Montagen MAINZ (Germany), representing an underground storage tank with accessories, communications, pump, gas column for filling LPG system protection. Upon reaching contenta ventilation, upon reaching the gas concentration in air of 40% of the lower explosive limit of flame propagation is enabled, the system emergency stop. A disadvantage of the known design is that the penetration of the vapor phase LPG to the atmosphere and the soil in case of depressurization of the vessel or communications in the weld, heat affected zones, connections, communications, and the discharge of LPG to the atmosphere from process equipment and pipelines in case of emergency leak of LPG.

The closest analogue of the claimed invention is the device of LPG filling stations, comprising a vessel with a sealed annular space and connecting communication (see patent US 5884488, CL F 17 C 13/00, 1999).

The technical result of the invention is to design a gas station that delivers powerful protection against leakage of LPG to the atmosphere and the soil, the ability to control these leaks and the use of actuators to provide electric discharge residue gas vessel and communications, as well as the blocking of an emergency when it occurs without release of LPG in the environment.

This technical result is achieved by the fact that gas stanie communication, equipped with the equipment to control the pressure between the walls of the connecting communication is made with a sealed annular space, and the space between the walls of the vessel and communications filled with inert gas with pressure PATM<Pwhere RATM- atmospheric pressure, P is the pressure in the annular space, Rslave- pressure in the vessel, with each segment communications limited at the ends of the flanges or couplings: deaf and control channels, flanges or coupling gap through the channels connected to the annular space communications, and at the ends of the section of the communications made lens compensators.

The vessel is equipped with a hatch cover, and the station - drainage pipe for pumping heavy fractions and non-combustible residues of liquefied petroleum gas.

In Fig.1 shows a vessel filling station of Fig.2 - site communications petrol station.

Filling station includes LPG vessel 1 and the container 3 with the annular space 2 between them, a support 4, a cover 5 covers, gaskets, 6, 7 conclusions for the control equipment, terminals 8 for the Executive working mechanisms, the drain pipe 9. Site communications including the equipment 16, the inner strip 17, the outer strip 18, wafer or mimotope space 19 and the compensator 20.

A filling station, LPG, filled to 85% of a mixture of propane and butane, is operated as follows. Annular space 2 and 3 are filled with an inert gas with pressure PATM<Pwhere RATM- atmospheric pressure, P is the pressure in the annular space, Rslave- pressure in the vessel (elasticity LPG). When the tightness of the system pressure P=const.

When the depressurization of the pressure P becomes equal to Rslave. With increasing pressure P through the control apparatus 16 is blocked by the operation of a gas station. When the depressurization of the strip 6 and the flange of the pipe capacity 3 pressure P becomes equal to RATM. When the reduced pressure P through the control apparatus 16 is also blocked the work station. The station is installed in the underground variation with temperature of the surrounding soil t=10o5oFor middle latitudes. Filling station, LPG according to GOST can be conducted at temperatures from -40oC to +50oAnd pressure Pslavefrom 0.05 MPa to 1.6 MPa. To compensate for the linear and volume thermal expansion and contractions which I slip on these supports, and the cover 5 through the strip 6 connect the vessel 1 with a capacity of 3. The absence of rigid welded and mechanical joints contributes to the maturity of temperature extremes and fatigue stresses of the vessel 1 and vessel 3. Drainage pipe 9 located on the bottom of the vessel 1 and the annular space 2, allow through the cover 5 covers actuators 8 to produce the pumping of heavy fractions and non-combustible residues of LPG as their accumulation.

The annular space 14 plot of communications channels 13 of the flange or coupling 12 is connected with the space 19 formed by the strips 17, 18 and flanges (collars) 11, 12. When the pressure loss of the inner strip 17 to increase or decrease the pressure P leads to block a gas station through the control apparatus 16.

To speed up the search of a flaw in the plot of communications made Autonomous and bounded at the ends of the flanges (collars): blind flange (coupling) 11 and the flange (coupling) with 12 channels connecting between the walls and face-to-face space with the control apparatus 16. Utilities on the site the annular space 14 limited rigid welded or mechanical connections. Pipe 10,15 and flanges (clutch) 11,12 are connected through a lens to the th annular space and connective communication, characterized in that the station is equipped with instrumentation to monitor the pressure between the walls, connecting the communication is made with a sealed annular space, and the space between the walls of the vessel and communications filled with inert gas with pressure PATM<Pwhere RATM- atmospheric pressure, P is the pressure in the annular space, Rslave- pressure in the vessel, with each segment communications limited at the ends of the flanges or couplings: deaf and control channels, flanges or coupling gap through the channels connected to the annular space communications, and at the ends of the section of the communications set the lens compensators.

2. Gas station on p. 1, characterized in that the vessel is equipped with a hatch cover, and the station - drainage pipe for pumping heavy fractions and non-combustible residues of liquefied petroleum gas.

 

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