RU2765879C2 - Mobile car gas refueller - Google Patents

Abstract

FIELD: car industry.

SUBSTANCE: invention is intended for gas compression and refueling of gas cylinder cars. First shut-off valve (2) is installed at a gas inlet to compressor unit (1). Second shut-off valve (13) is installed at a gas inlet to drying unit (11). Gas inlet and outlet of drying unit (11) are interconnected via third shut-off valve (14) installed on a bypass line. Fourth shut-off valve (15) is installed at a gas outlet of compressor unit (1). Inlets of low-pressure gas accumulators (18) are additionally connected to a gas inlet of a side source via fifth shut-off valve (21). Inlets of medium-pressure gas accumulators (19) are connected to the gas inlet of the side source via sixth shut-off valve (22). Inlets of high-pressure gas accumulators (20) are additionally connected to the gas inlet of the side source via seventh shut-off valve (20). Outlets of low, medium and high-pressure gas accumulators (18, 19, 20) are additionally connected to the gas inlet of the compressor unit via the eighth shut-off valve.

EFFECT: providing the possibility of refueling motor transport in several modes.

1 cl, 1 dwg

Description

The field of technology.

The claimed technical solution relates to the field of compressor engineering and is intended for compressing gases and refueling LPG vehicles.

The level of technology.

A station for compressing natural gas is known (AS 1825401 USSR, MKI F04B41 / 00. Station for compressing natural gas [Text] / V.A. Kondratiev - No. 4890178; application 13.12.90; publ. 30.06.93, Bull. No. 24, [1]). As in the claimed technical solution, the station [1] contains a compression unit, a drying unit, a receiver and a refueling post.

Analogue [1] also contains a gas preparation unit. The gas dehydration unit includes moisture-oil separators, two adsorbers, filters, a heat exchanger, a moisture meter and switching valves.

Known modular system for producing compressed natural gas (US Pat. 2631954 Russian Federation: IPC F17C 5/00. Modular system for producing compressed natural gas [Text] / Utal Dalbir Singh, McReynolds Ryan - No. 2014135032, Appl. 03/06/2013, publ. 29.09.2017 Bull. No. 28, [2]). As in the claimed technical solution, this analog contains a compressor, gas storage tanks and dispensing devices.

Analogue [2] has a compressor located in a container. Gas storage tanks are installed completely on the top surface of the container.

Among mobile automobile gas tankers, a mobile gas filling station is known (pat. 2305224 of the Russian Federation: IPC F17C5 / 06, F17D1 / 04. A method of refueling vehicles with compressed natural gas (options) and a mobile gas filling station for its implementation [Text] / Naumeyko A.V. ., Naumeiko S.A., Naumeiko A.A. - No. 2006115705, application 05/06/2006, published 08/27/2007 Bull. No. 24, [3]). As in the claimed technical solution, the specified analog contains a compression unit, dryers, a gas accumulator unit and a filling column.

In analogue [3], the output of the dryers is connected to the input of the compression unit, the output of which is connected to the input of the gas accumulator unit. The natural gas accumulator unit has 20 MPa, 25 MPa and 40 MPa, grouped into first, second and third sections according to the pressure value, respectively.

A gas-filling compressor station is known (pat. 146880 Russian Federation: IPC F17C5 / 00. Automobile gas-filling compressor station [Text] / Igor Valerievich Voroshilov; patent holder Tegas Limited Liability Company - No. 2014105356, dec. 14.02.2014, publ. 20.10 .2014 Bulletin No. 29, [4]). As in the claimed technical solution, it contains a compressor unit, an adsorption drying unit, a gas accumulator unit and a filling column.

Analogue [4] also contains a block of the inlet gas sampling device, consisting of a ball valve at the inlet from the main gas pipeline to the CNG filling station, a coarse filter and a block of inlet valves, a gas flow measurement unit.

The closest analogue of the claimed technical solution is an automobile gas-filling compressor station (pat. 155545 Russian Federation: IPC F02B63 / 06, F17C5 / 06, F04B41 / 02. Automobile gas-filling compressor station driven by a gas piston internal combustion engine [Text] / Voroshilov Igor Valerievich, Roytman Evgeny Vladimirovich, patent holder Tegas Limited Liability Company - No. 2014138228, filed on September 22, 2014, published on October 10, 2015 Bull. No. 28, [5]). As in the claimed technical solution, the specified analogue contains a compressor, the gas outlet of which is connected to the drying unit. The gas outlet of the drying unit is connected to the filling stations and additionally to the accumulator unit.

Analogue [5] has a reciprocating compressor and is placed in the compressor unit. An inlet filter, a block of inlet valves, a gas flow measurement device are installed in front of the compressor block, and an accumulator block, a microhumidity measuring device, and a filling column are installed after the drying block. The compressor block additionally includes a separator, an air cooling system, moisture-oil separators, a purge system, a purge tank. The drying unit consists of two adsorbers filled with silica gel sorbent.

The technical problem, the solution of which is ensured in the implementation of the technical solution, is the need to expand the functionality of the automobile gas tanker.

Disclosure of the essence of the technical solution.

The technical result provided by the claimed technical solution is to provide the possibility of refueling vehicles in several modes.

The essence of the claimed technical solution is that the compressor station contains a compressor unit with a drying unit, gas accumulators, a filling column. At the same time, the gas outlet of the compressor unit is connected to a filling station and gas accumulators. It differs in that

- the first shut-off valve is installed at the gas inlet to the compressor unit;

- a second shut-off valve is installed at the gas inlet of the drying unit, while the gas inlet and outlet of the drying unit are interconnected through the third shut-off valve installed on the bypass line;

- a fourth shut-off valve is installed at the gas outlet of the compressor unit;

- inputs of low-pressure gas accumulators are additionally connected to the gas input from a third-party source through the fifth shut-off valve;

- medium-pressure gas accumulator inputs are connected to the gas input from a third-party source through the sixth shut-off valve;

- inputs of high-pressure gas accumulators are additionally connected to the gas input from a third-party source through the seventh shut-off valve;

- outlets of low, medium and high gas pressure accumulators are additionally connected to the gas inlet of the compressor unit through the eighth shut-off valve.

The above entity is a set of essential features of the claimed technical solution, ensuring the achievement of the claimed technical result.

The authors of the claimed technical solution produced a prototype of this solution, the tests of which confirmed the achievement of the technical result.

Brief description of the drawings.

The figure shows a diagram of a mobile gas tanker.

Implementation of a technical solution.

The PAGZ 2400 mobile gas tanker is a compressor station for compressing natural gas and contains a compressor unit (1) and gas accumulators (18, 19, 20) (Fig.) placed on a semi-trailer.

Unlike the prototype [5], the proposed technical solution is made with the ability to work in three modes. In each of the modes, refueling of vehicles can be carried out.

At the gas inlet to the compressor unit (1), the first shut-off valve (2) is installed. The compressor unit contains a heater (3), the first filter (4), a gas metering unit (5), a receiver (6), a compressor (7), a moisture separator (8), the second and third filters (9, 10) and a drying unit (11 ).

A control valve (12) is installed in front of the heater (3), after which the pressure of the compressed gas is maintained in the range from 0.4 MPa to 0.55 MPa. The heater (3) is connected in series with the first filter (4), gas metering unit (5) and receiver (6). In the receiver (6) the pulsations that occur during the operation of the process equipment are smoothed out. The outlet of the receiver (6) is connected to the compressor (7). The compressor outlet (7) is connected to the drying unit (11) through the dehumidifier (8), the second and third filters (9, 10). The drying unit (11) contains adsorption dryers.

A second shut-off valve (13) is installed at the gas inlet of the drying unit (11). The gas inlet and outlet of the drying unit (11) are interconnected through a third shut-off valve (14) installed on the bypass line. The bypass line allows you to turn off the drying unit (11) in the first mode of operation (emptying the gas accumulators (18), (19), (20)). The gas outlet of the drying unit (11) is the gas outlet of the compressor unit (1).

At the gas outlet of the compressor unit (1), a fourth shut-off valve (15) is installed, through which the compressor unit (1) is connected to an intermediate gas accumulator (16), at least one filling column (17), low-pressure gas accumulators (18), medium pressure gas accumulators (19) and high pressure gas accumulators (20).

The division of gas accumulators (18, 19, 20) into sections allows reducing the pressure drop during filling, reducing excess pressure and more fully using the volume of the accumulators.

The filling column (17) contains a low pressure gas inlet, a medium pressure gas inlet and a high pressure gas inlet, on which shut-off valves are installed.

The inputs of the low pressure gas accumulators (18) and the low pressure gas input of the gas filling column (17) are additionally connected to the gas input from a third-party source through the fifth shut-off valve (21).

The medium pressure gas accumulator inlets (19) and the medium pressure gas inlet of the gas filling column (17) are additionally connected to the gas inlet from a third-party source through the sixth shut-off valve (22).

The inputs of the high pressure gas accumulators (20) and the high pressure gas input of the gas filling column (17) are additionally connected to the third gas input from a third-party source through the seventh shut-off valve (23).

The outputs of the low, medium and high gas pressure accumulators (18, 19, 20) are additionally connected to the gas inlet of the compressor unit through the eighth shut-off valve (24). This connection allows the gas accumulators (18, 19, 20) to be used as a gas source.

Examples of specific implementation.

Example 1. Compressor (4) is a two-row four-stage opposed piston compressor. The gas outlet of the first stage cylinder (30) is connected to the gas inlet of the second stage cylinder (31) through the first stage gas cooler (25). The gas outlet of the second stage cylinder (31) is connected to the gas inlet of the third stage cylinder through the second stage gas cooler (26). The gas outlet of the third stage cylinder (32) is connected to the gas inlet of the fourth stage cylinder (33) through the first and second third stage gas coolers (27, 28). The gas outlet of the fourth stage cylinder (33) is connected to the inlet of the end gas cooler (29).

Example 2. The compressor unit contains an additional gas cooler (32). At the same time, the outlet of the end gas cooler (29) is connected to the inlet of the additional gas cooler (34) through the ninth shut-off valve (35), and to the outlet of the additional gas cooler (34) through the tenth shut-off valve (36) located on the bypass line. When the compressed gas temperature is below plus 10°C, it is allowed to let gas through the bypass line.

Example 3. There are two filling columns (17).

Example 4 The outlet of the fourth check valve (15) is connected to the high pressure gas inlet of the dispenser (17) through the ninth check valve (37). In addition, the output of the fourth shutoff valve (15) is connected to the high pressure accumulators (20) through the tenth shutoff valve (38), to the medium pressure accumulators (19) through the eleventh shutoff valve (39) and to the low pressure accumulators (18) through the twelfth check valve (40).

The implementation of the proposed technical solution is not limited to the above examples.

The order of use.

In the first mode of operation, the source of compressed gas is gas accumulators (18, 19, 20).

In this mode, the first stop valve (2), the second stop valve (13), the fifth stop valve (21), the sixth stop valve (22) and the seventh stop valve (23) are closed. Open the third shut-off valve (14), the fourth shut-off valve (15), the eighth shut-off valve (24), the shut-off valves on the compressed gas supply lines to the low, medium and high pressure gas accumulators (18, 19, 20), the shut-off valves on the lines compressed gas supply to gas filling columns.

Compressed gas from one or all gas accumulators (18, 19, 20) enters the compressor unit through the open eighth shut-off valve (24). In the compressor unit, compressed gas passes through the control valve (12). During the throttling process, the temperature of the incoming gas decreases, so the compressed gas then passes through the heater (3). Then the heated gas passes through the filter (4), the gas metering unit (5) and the receiver (6). After the receiver (6), the compressed gas enters the compressor (7). After compression in each stage, the gas is cooled in the respective gas cooler (25, 26, 27, 28, 29). After the compressor (7), the gas enters the additional gas cooler (34), dehumidifier (8) and filters (9, 10). After cleaning, the compressed gas enters the outlet of the compressor unit through the open third shut-off valve (14). Then the compressed gas sequentially fills up to the maximum pressure the intermediate gas accumulator (16) and the cylinder of the motor vehicle connected to at least one column (17). Upon reaching the maximum pressure in the column line (17), the high-pressure gas accumulators (20) are filled up to the maximum pressure. Next, the medium-pressure gas accumulators (19) are filled up to the maximum pressure. After that, the low-pressure gas accumulators (18) are filled up to the maximum pressure. After all the accumulators (18, 19, 20) are filled to the maximum pressure and there are no vehicles connected to the dispensers (17), the compressor (7) is turned off and the station switches to standby mode. In this case, refueling of cars is carried out from batteries (18, 19, 20). First of all, filling takes place from high pressure gas accumulators (20), then medium pressure gas accumulators (19) and then filling is completed from low pressure gas accumulators (18).

In the second mode of operation, gas from the main pipeline is used as a gas source. In this case, the first shut-off valve (2), the second shut-off valve (13), the fourth shut-off valve (15), the shut-off valves on the compressed gas supply lines to the low, medium and high pressure gas accumulators (18, 19, 20), the shut-off valves on lines for supplying compressed gas to gas filling columns (17). The eighth stop valve (24), the third stop valve (14), the fifth stop valve (21), the sixth stop valve (22) and the seventh stop valve (23) are closed.

In the second mode of operation, the gas after compression and purification enters the columns (17) and gas accumulators (18, 19, 20) through the drying unit (11).

In the third mode of operation, gas accumulators (18, 19, 20) are refueled from a third-party CNG filling station. At the same time, the first shut-off valve (2), the fourth shut-off valve (15), the eighth shut-off valve (24) are closed. Open the fifth, sixth, seventh shut-off valves (21, 22, 23) and shut-off valves on the compressed gas supply lines to gas filling columns. In this case, the start of the compressor (7) is not required, and the refueling of the vehicle is ensured by injecting gas from the connected CNG station.

Industrial applicability.

The claimed technical solution is implemented using industrially produced devices and materials, can be manufactured at any oil and gas engineering enterprise.

Claims (8)

Compressor station containing a compressor unit with a drying unit, while the gas outlet of the compressor unit is connected to a filling column and gas accumulators, characterized in that - the first shut-off valve is installed at the gas inlet to the compressor unit; - a second shut-off valve is installed at the gas inlet of the drying unit, while the gas inlet and outlet of the drying unit are interconnected through the third shut-off valve installed on the bypass line; - a fourth shut-off valve is installed at the gas outlet of the compressor unit; - inputs of low-pressure gas accumulators are additionally connected to the gas input from a third-party source through the fifth shut-off valve; - medium-pressure gas accumulator inputs are connected to the gas input from a third-party source through the sixth shut-off valve; - inputs of high-pressure gas accumulators are additionally connected to the gas input from a third-party source through the seventh shut-off valve; - outlets of low, medium and high gas pressure accumulators are additionally connected to the gas inlet of the compressor unit through the eighth shut-off valve.

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