RU2778656C2 - Unit for capturing petroleum product vapours at filling stations with separation of the vapour-air mixture on membranes with a system for monitoring the effectiveness thereof - Google Patents

Abstract

FIELD: petroleum industry.

SUBSTANCE: invention relates to technical means of capturing petroleum product vapours at filling stations. Unit for capturing petroleum product vapours at gas stations with separation of the vapour-air mixture on membranes with a system for monitoring the effectiveness thereof comprises a fuelling nozzle, a pressure sensor, a compressor, a receiver, a valve, a tank with fuel, a fuel dispenser with a pump for pumping the vapour-air mixture, a first block of selective membranes, a second selective-action membrane block whereto the purified vapour-air mixture is partially supplied. Clean air and water vapour are therein removed from the system through the membrane valves, and the condensed petroleum product is pumped into the fuel tank by the pump. When the pressure sensor is triggered, the vapour-air mixture is injected from the fuel dispenser to the receiver by means of the compressor, being further supplied to the water vapour condensation block with an inner water level sensor and a pump for pumping the water. The unit also comprises gas analysers transmitting data to the control unit, wherein said unit processes the received data and informs about the contained concentrations of the vapour-air mixture.

EFFECT: increase in the degree of capturing of petroleum product vapours at filling stations and possibility of evaluating the effectiveness of the membrane blocks.

1 cl, 1 dwg

Description

This invention relates to technical means for capturing vapors of petroleum products at gas stations.

A useful model is known from the existing state of the art (Patent RF No. 131479 "Installation for capturing vapors of petroleum products from tanks and tanks of machines at gas stations", IPC G01F 23/00 - publ. dated 20.08.2013), in which the breathing valves of tanks at gas stations are equipped with a piping system connected to the main steam pipeline connected to a buried tank with a low-octane component, which is equipped with a receiving device and a shaft for rotating centrifugal wheels, while the main steam pipeline passes the cooling system, including a heat exchanger, a pump and a container with a cooling mixture, and the vapors from the tanks machines by the unit through a two-channel distributing sleeve and a section of the steam pipeline are pumped out into a separate tank equipped with check valves with different opening pressures, while under the pressure of the operation of the unit, oil vapors accumulate in the tank and periodically through the high pressure check valve enter the main steam pipeline with the system cooling and then into a tank for additional absorption.

The disadvantages of the installation for capturing vapors of petroleum products from tanks and tanks of machines at gas stations are:

- the need to send a low-octane component for processing, due to its unsuitability for further use due to the accumulation of water in it, which leads to additional financial costs;

- the level of immersion of the main steam line in the low-octane component is unknown.

An invention is known (RF Patent No. 2496559 "Installation for capturing vapors of oil and oil products", IPC B01D 53/75 - publ. from 27.10.2013), which contains a refrigeration unit, a pipeline connected to the vapor zone of the tank and to the refrigeration unit, pump, shut-off valves and connecting pipelines. At the same time, the refrigeration unit is made in the form of a vapor-air mixture condensation unit connected to the refrigeration unit, containing a cylindrical body with external thermal insulation, in which one or a group of hollow partitions in the form of bushings are coaxially installed, on the outer surface of each of which a refrigerant pipeline with a checkerboard pattern is wound in a spiral. the location of the pitch, which ensures the rotation of the steam-air flow, the creation of centrifugal forces and optimal contact of vapors with a cold surface, the ends of the refrigerant pipeline are rigidly fixed in the lower part of the housing with the inlet and outlet fittings of the refrigerant connected to the refrigeration unit, and a condensate drain fitting is installed in the center of the lower part of the housing steam-air mixture, connected by a pipeline to a condensate collection tank, equipped in the lower part with a water collector with a valve for draining, a pipeline with a valve is connected to the condensate collection tank, connecting the indicated tank with the pumping unit of the tank, in the upper part of the housing is hermetically sealed with a lid, in which a fitting for supplying a vapor-air mixture from the drain tank and a fitting for removing purified air to the drain tank are hermetically installed, while pressure and temperature sensors connected to the block of instrumentation and control automation are also installed in the refrigeration block housing refrigeration unit.

The disadvantage of the installation for capturing vapors of oil and oil products is:

- high energy intensity of the installation.

The closest in technical essence to the claimed invention is a utility model (RF Patent No. 157866 "Device for capturing vapors of petroleum products at gas stations with the separation of the vapor-air mixture on membranes", IPC B60K 15/035 - publ. from 20.12.2015), which contains a filling gun, pressure sensor, compressor, receiver, valve, fuel tank. At the same time, a pump for pumping the vapor-air mixture, the first block of selective membranes, the second membrane block of selective action, into which the purified vapor-air mixture partially enters, clean air is removed from the system through the valve, and the condensed oil product is pumped by the pump into the fuel tank, are installed in the fuel dispenser.

The disadvantages of the device for capturing vapors of petroleum products at gas stations with the separation of the vapor-air mixture on membranes are:

- low degree of purification of the steam-air mixture;

- the inability to evaluate the efficiency of selective membrane units.

The tasks to be solved by the claimed invention are to increase the efficiency of trapping vapors of petroleum products and to evaluate the efficiency of the blocks of selective membranes.

These tasks are achieved due to the fact that the installation for capturing the vapors of petroleum products at gas stations with the separation of the vapor-air mixture on membranes with a system for monitoring its effectiveness contains a filling nozzle, a pressure sensor, a compressor, a receiver, a valve, a fuel tank, a fuel dispenser with a pump for pumping the vapor-air mixture , the first block of selective membranes, the second membrane block of selective action, into which the purified vapor-air mixture partially enters, while clean air and water vapor are removed from the system through the valves of the membranes, and the condensed oil product is pumped into the fuel tank by a pump, while the vapor-air mixture is injected when triggered pressure sensor is carried out from the fuel dispenser to the receiver using a compressor with further flow to the condensing unit of water vapor with a water level sensor located inside and a pump for pumping it out, the device also additionally contains gas analyzers that transmit data sent to the control unit, which processes the received data and informs about the contained concentrations of the vapor-air mixture.

The technical result provided by the above set of features is to increase the degree of trapping of vapors of petroleum products at gas stations due to the fact that the vapor-air mixture enters the fuel tank after being cleaned from water vapor particles using a condensation unit with a water level sensor located inside and a pump for pumping it out, and also the possibility of evaluating the efficiency of the membrane units through the use of a gas analyzer, which, in case of exceeding the permissible values, sends a signal to the control unit about the need to replace the membranes.

The essence of the invention is illustrated in Fig. 1, which shows a general view of the device for capturing vapors of petroleum products at a gas station with the separation of the vapor-air mixture on membranes and a system for evaluating the effectiveness of its work.

Installation for capturing vapors of petroleum products at the gas station with separation of the vapor-air mixture on membranes with a system for monitoring its efficiency includes a filling nozzle with an additional channel for removing the vapor-air mixture 1, a fuel dispenser 2 with an internally installed pump for pumping the vapor-air mixture 3, a pressure sensor 4, a compressor 5 , receiver 6, valve 7, water vapor condensation unit 9 with a water level sensor 10 installed inside and a pump for pumping out accumulated water 8, a fuel tank 11 and a pump 14, the first selective membrane unit 12, the second selective membrane unit 13, membrane valves 15, gas analyzers 16 and control unit 17.

The oil product vapor recovery unit at gas stations with the separation of the vapor-air mixture on membranes with a system for monitoring its efficiency works as follows: when refueling a car, the displaced hydrocarbon vapors through a filling nozzle with an additional channel for removing the vapor-air mixture 1 enter the fuel dispenser 2 with a pump located inside for pumping the vapor-air mixture 3. Then the steam-air mixture 1 is pumped by the compressor 5 into the receiver 6, passing through the pressure sensor 4. When the valve 7 is actuated, the steam-air mixture passes through the water vapor condensation unit 9 with the water level sensor 10 located inside and the water pump 8, followed by entering the tank with fuel 11.

Then the mixture passes the first block of selective membranes 12, where the vapor-air mixture is separated and the remaining water vapor is removed to the gas analyzer 16, after which the partially purified vapor-air mixture enters the second selective membrane unit 13, into which the purified vapor-air mixture is partially supplied, clean air is removed from system through the membrane valves 15 into the gas analyzer 16, and the condensed oil product is pumped by the pump 14 into the fuel tank 11. If the permissible concentrations of the vapor-air mixture are exceeded, the control unit 27, which receives data from the gas analyzers 16, informs about the need to replace the membrane blocks 12 and 13, respectively.

Claims (1)

Petroleum product vapor recovery unit at gas stations with separation of the vapor-air mixture on membranes with a system for monitoring its effectiveness, containing a filling nozzle, a pressure sensor, a compressor, a receiver, a valve, a fuel tank, a fuel dispenser with a pump for pumping the vapor-air mixture, the first block of selective membranes, the second a selective membrane unit, into which a purified vapor-air mixture partially enters, while clean air and water vapor are removed from the system through the membrane valves, and the condensed oil product is pumped into the fuel tank by a pump, characterized in that the vapor-air mixture is injected from the fuel dispenser when the pressure sensor is triggered columns into the receiver using a compressor with further entry into the condensing unit of water vapor with a water level sensor located inside and a pump for pumping it out, the device also additionally contains gas analyzers that transmit data to the control unit, which The latter processes the received data and informs about the contained concentrations of the vapor-air mixture.

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