Multi-purpose gas-filling compressor station for automobiles

FIELD: gas-filling compressor stations for automobiles.

SUBSTANCE: proposed gas-filling compressor station includes natural gas compression system for filling the automobile reservoirs with natural gas. Part of high-pressure air compressed in compressor is directed through preliminary recuperative heat exchanger. Then gas is additionally cooled in heat exchanger-evaporator by evaporating coolant, Freon or propane for example and is divided into two flows after low-temperature recuperative heat exchanger in vapor compression refrigerating machine. One flow is fed through throttle valve to receiver-separator where finished product-liquefied natural gas- is separated in form of liquid phase and then to storage reservoir and technological reservoir. Second flow after passing the throttle valve is combined with cold vapor escaping from receiver-separator in form of return flow giving cold to direct flow in recuperative heat exchangers and returns to compressor suction end to which vapor of liquefied natural gas is fed from drainage lines of storage reservoir and technological reservoir. Both reservoirs are equipped with individual supercharging systems for supercharging the reservoirs from compressor.

EFFECT: maximum loading of equipment.

2 cl,, 1 dwg

 

The invention relates to the field of compressor installations or systems, and cryogenics.

Known techniques for refueling vehicles with compressed natural gas (CNG) automobile gas-filling compressor stations - CNG /1, 2/.

The transfer of vehicles to gas fuel provides a significant economic effect and significantly reduces toxic emissions, deciding thus, environmental problems of modern cities. For example, in Russia in the 80-ies was built up to 250 CNG-500 to provide 500 stations per day on each of them.

Traditional technological scheme called stations include a set of equipment connected network of gas, its preparation for compression, the compression to 20.0 bar, cooling of the gas after compression, controls, automation, protection and other

However, the utilization of CNG stations associated with the real scale of NGVs in the country as a whole does not exceed 7-8%, which leads to significant losses associated with inefficient use of equipment, downtime for maintenance personnel.

The problem can be solved by adding these stations universal as by obtaining additional refueling their vehicles not only CNG, and liquefied natural what Asom (LNG), and creation on their basis of mini LNG plants for the implementation of third-party consumers, including objects of power, utilities and so on.

As the closest analogue of a device automobile gas-filling compressor station, including a system of compressing a network of gas to fill car tanks, in which a part of the compressed in the compressor of high pressure gas, reducing gas consumption, for example, at night, goes to pre-recuperative heat exchanger, and then in the installation for liquefying gas (3).

The aim of the invention is the creation of multipurpose automobile gas-filling compressor station on the basis of CNG stations for maximum load of the equipment and ensure the possibility of its use as a universal complex vehicle refueling of compressed natural gas (CNG), liquefied natural gas (LNG) and LNG customers.

Mass creation of mini LNG plants on the basis of CNG stations across the country will allow a wide use of this new type of fuel - the fuel of the XXI century - in the national economic and defense industries of Russia, as well as to create a base for the export of LNG to foreign countries.

The invention consists in that the gas filling in a hundred who tion, includes system compression network of gas to fill car tanks, part compressed in the compressor high pressure gas is directed into pre-recuperative heat exchanger, after which the gas, unlike analogue, douglasdale in the heat exchanger-evaporator boiling refrigerant, such as freon, propane, from the external cooling circuit on the basis of the vapor compression refrigerating machine and after low-temperature regenerative heat exchanger is divided into two streams, one of which is through the throttle valve is served in the collector-separator where the liquid phase is separated finished product is liquefied natural gas (LNG) and then to the storage tank and (or in a processing tank, and the second passing through the throttle valve, is connected with a cold steam exhaust from the collector-separator as a reverse flow, gives direct cold flow regenerative heat exchangers and returned to the compressor inlet, which serves also LNG vapors from the drainage lines of the process vessel and storage tanks, both tanks are equipped with systems of individual pressurization gas tank from the compressor.

The storage tank station have a drain column for LNG in transport tanks, and technological - avtozapravochnoj for LNG fueling vehicles, with cryogenic fuel tanks.

Drainage lines from the transport tank and pumps motor connected to the compressor inlet.

Process chamber serves to provide continuity in the work of liquefaction plants at the time of filling vehicle tanks from storage tanks and storage tank and process vessel equipped with systems of individual pressurization tanks with compressed gas from the compressor.

A schematic diagram of a possible implementation of the proposed automobile gas-filling compressor station shown in the drawing. Automobile gas-filling compressor station includes: a compressor (1), advanced regenerative heat exchanger (2), the heat exchanger-evaporator (3), the vapor compression refrigerating machine (4), low-temperature regenerative heat exchanger (5), the throttle valves (6 and 7), the collector-separator (8), a system of individual pressurization of the process vessel (9), the individual charge storage tanks (10), process chamber (11), the storage tank (12), ramp fueling vehicles compressed natural gas (13), filling a column for refueling of vehicles liquefied natural gas (14) and filling the column for shipment of liquefied natural gas to outside customers(15).

Automobile gas-filling compressor station operates in the following manner:

part compressed in the compressor 1 high pressure gas is directed to a ramp 13 refueling vehicles with compressed natural gas (CNG).

The second part is compressed in the compressor 1 high pressure gas is directed in a preliminary recuperative heat exchanger 2, Doklady in the heat exchanger-evaporator 3 (for example, freon, propane) from the external cooling circuit on the basis of the vapor compression refrigerating machine 4 and after low-temperature regenerative heat exchanger 5 is divided into two streams.

One of them through the throttle valve 7 serves in the collector-separator 8, where it is separated liquid phase of the finished product - LNG, and then in the processing tank 11 and tank 12.

The second stream is passed through the throttle valve 6 and combined with the exhaust from the collector-separator 8 cold vapor used as a reverse flow for cold transfer direct flow regenerative heat exchangers 2 and 5, and return to the suction side of the compressor 1.

There, on the suction side of the compressor, also serves LNG vapors from the vent technological lines 11 and 12 stationary tanks.

Process chamber 11 doesnat filling column 14 filling liquefied natural gas (LNG) vehicles with cryogen is s fuel tanks, and the storage tank 12 and filling column 15 for shipping LNG to third-party consumers.

As the process chamber 11, and the storage tank 12 is supplied with systems 9 and 10 individual pressurization tanks with compressed gas from the compressor 1.

The use of the invention will improve the economic efficiency of equipment at existing CNG station, to create a universal complexes vehicle refueling of compressed natural gas (CNG), liquefied natural gas (LNG) and ship (LNG) to external customers.

Literature

1. Trushin V.M. Gas equipment and fittings for CNG vehicles (compressed natural gas). - Leningrad: Nedra, 1990, p.30-33.

2. Vasiliev, Y., Gritsenko A.I. Chirikov CU Gazetapraca transport. - M.: Nedra, 1995, s, RES.

3. A.S. No. 1687859 A1 gas-Filling compressor station.

1. Automobile gas-filling compressor station, including a system of compressing a network of natural gas to fill car tanks, in which a part of the compressed in the compressor high pressure gas is directed into pre-recuperative heat exchanger, characterized in that after the pre-heat exchanger gas douglasdale in the heat exchanger-evaporator boiling refrigerant such as freon or propane, on the basis of arcompressions refrigerating machine and after low-temperature regenerative heat exchanger is divided into two streams, one of which is through the throttle valve is served in the collector-separator where the liquid phase is separated finished product is liquefied natural gas (LNG) and then to the storage tank and process vessel, and the second passing through the throttle valve, is connected with a cold steam exhaust from the collector-separator as a reverse flow, gives direct cold flow regenerative heat exchangers and returned to the inlet of the compressor, which serves also LNG vapors from drainage lines, storage tanks and process tanks, both tanks are equipped with systems of individual pressurization gas tanks from the compressor.

2. Station according to claim 1, characterized in that the process chamber is equipped with a filling column for LNG fueling vehicles with cryogenic fuel tanks and storage tank provided with a filling column for LNG in transport tanks.



 

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