RU2617539C1 - Automobile gas-filling compressor station - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: automobile gas-filling compressor station (AGFCS) includes: the filter separator (1), the compressor unit (2), the gas dehydration plant (3), the gas accumulators (4), the filling columns (5), the high pressure gas line (6), the jumper with a stop valve (7).

EFFECT: reducing the time for refuelling a newly arrived gas-cylinder vehicle at an automobile gas filling compressor station during refuelling by a mobile car gas-refueller at said station.

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Description

The present invention relates to the gas industry, in particular to an automobile gas-filling compressor station (CNG filling station).

Known automobile gas-filling compressor station, consisting of a flow meter unit, a filter separator, a compressor unit, gas accumulators and gas columns. (Technology of using compressed gases, lecture course, compiled by G.A. Bondarenko, Sumy, Sumy State University Publishing House, 2011, pp. 107-108, Fig. 5.13). In a known station, the network gas, after preliminary cleaning in the filter-separator, the flow meter assembly, at an excess pressure of 0.5-2 kg / cm ^{2, is} fed to the compressor suction, where it is compressed to 230 kg / cm ² . After dehumidification and dehydration, gas is pumped into the accumulators and also supplied to the gas stations. In the case when gas-filled cars (GBA) are simultaneously refueled at CNG filling stations with a total volume of gas stored on board a vehicle (TS) with a total capacity not exceeding the volume of gas accumulated in CNG accumulators, the time for filling each of the simultaneously refueled vehicles will be on average about 10 minutes. The main characteristic of CNG filling stations is the number of gas stations per day. The station size, type and performance of compressor equipment and other devices depend on this. If the volume of gas accumulated in the CNG filling stations is less than the total volume of filling the GBA, then for the most part the filling will be done directly from the CNG compressor. At the same time, the refueling time of all simultaneously refueled vehicles will be equal to the refueling time of the GBA with the largest total storage volume of compressed natural gas (CNG) on board and will average about 20-25 minutes, depending on the performance of the compressors. For refueling mobile automobile gas tankers (PAGZ), a significant amount (from 3,000 to 10,000 nm ³ ) of CNG is required, depending on the modification. The maximum among the known volume of accumulated CNG at CNG stations is 4200 nm ³ . Therefore, the refueling time of PAGZ and GBA even by high-performance CNG stations will be from 1.5 to 9 hours, which is a disadvantage of the known technical solution.

The objective of the invention is the creation of CNG filling stations, which reduces the time of refueling the newly arrived GBA at CNG filling stations.

The technical result of the invention is to reduce the refueling time of a newly arrived GBA at CNG filling stations at a time when PAGZ is refueling at this station.

The essence of the invention lies in the fact that an automobile gas-filling compressor station consists of a filter separator, a compressor unit, a gas dehydration unit, a gas accumulator unit, gas stations and a high-pressure gas supply line. Moreover, the high-pressure gas supply line is made in at least two independent threads, each of which is connected to a separate outlet of the gas dehydration unit, as well as to the inlet of the battery pack and to the corresponding refueling column. In this case, the threads of the high-pressure gas supply line are connected by a jumper with shutoff valves.

The jumper with shutoff valves connecting the inputs of the threads of the high-pressure gas supply line in the open position allows the threads to be used in the single-line high-pressure gas supply mode, that is, it allows the use of CNG filling stations in the normal mode, using the entire capacity of the compressor unit.

Modernization (separation) of the high-pressure gas supply line is carried out in order to ensure independent supply of CNG to the filling columns. This solution can find application in the presence of at least two compressors on the CNG filling station. The compressor capacity in this case is divided in proportion to the flows of vehicles arriving at the gas station. At the same time, part of the compressors works directly for refueling PAGZ, which allows you to remove the dependence of the speed of refueling GBA in the case of simultaneous refueling GBA and PAGZ.

The invention is illustrated by drawings, where in FIG. 1 shows a block diagram of a CNG station adopted by the applicant as the closest analogue to the prototype. In FIG. 2 shows a diagram of the proposed station.

Known and proposed automobile gas-filling compressor stations (Fig. 1, 2) include a filter separator - 1, a compressor unit - 2, a gas dehydration unit - 3, a gas accumulator unit - 4, gas stations - 5, a high pressure gas supply line - 6 In addition, the proposed station (Fig. 2) contains a jumper with stop valves - 7.

During operation of an automobile gas-filling compressor station (Fig. 2), the network gas, after preliminary cleaning in the filter separator (1) at an excess pressure of 0.5-2 kg / cm ² , is fed to the suction unit in the compressor unit (2), where it is compressed up to 230 kg / cm ² . After installing gas dehydration (3), gas is pumped into the gas accumulator block (4), and also enters the gas stations (5).

Further, at the CNG filling station at the exit of the gas dehydration unit (3), the high-pressure gas supply line (6) is divided into two independently energized threads, along which CNG flows can be distributed between the accumulators of the gas accumulator block and the filling columns independently of each other. At the same time, the jumper with shutoff valves (7) connecting the threads of the high-pressure gas supply line in the open position allows the threads to be used in the single high-pressure gas supply line mode, as well as the use of CNG filling stations in the normal mode, using the entire capacity of the compressor unit.

The proposed station can operate in two modes.

In mode 1, the station refills high-capacity PAGZ. CNG from the compressor unit (2) along one thread of the high-pressure gas supply line (6) is supplied directly to the gas station (5) for refueling PAGZ. At the same time, the shutoff valves (7) are closed at the command of the CNG filling station operator. Another thread of the high-pressure gas supply line (6) will allow the CNG filling station to function normally, using the full unit of gas accumulators (4) to refuel newly arriving GBA.

In mode 2, by means of a jumper with shut-off valves (7), which is in the open position, both threads are closed in a single high-pressure gas supply line - all compressors are used to replenish CNG reserves in the gas accumulator block and to fill the GBA.

Thus, the invention eliminates the disadvantages of the known CNG. When using the proposed solution, the time for refueling with GBA is reduced, if at the CNG filling station the refueling with GBA and PAGZ is simultaneously carried out, therefore, the efficiency of gas engine fuel sales is increased.

Claims (1)

An automobile gas-filling compressor station (CNG filling station) consists of a filter separator, a compressor unit, a gas dehydration unit, a gas accumulator block, gas columns and a high-pressure gas supply line, characterized in that the high-pressure gas supply line is made of at least two independent threads, each of which is connected to a separate outlet of the gas dehydration unit, as well as to the input of the battery pack and to the corresponding refueling column, while the threads of the high-pressure gas supply line bridged with isolation valves.

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