RU2617224C1 - Automotive gas-filling compressor station - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: automotive gas-filling station (AMG filling stations) comprising: a filter separator (1), the compressor unit (2), the installation of gas dehydration (3), block the gas accumulators (4) dispensers (5), the high-pressure line of the gas supply ( 6), the pressure change sensor (7), the adjustment unit (8), the shut-off valve (9).

EFFECT: decrease filling time newcomer of LPG car on AMG station at a time when this is carried out refueling stations mobile Automobile gaz servicing truck.

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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 assembly, filter separator, 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 and 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. In the event that the volume of gas accumulated in the CNG filling stations is less than the total volume of refueling GBA, then the filling will for the most part be made directly from CNG filling stations. 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 amount of accumulated CNG at CNG filling stations can be 4200 nm ³ , therefore, the refueling time of PAGZ and GBA even with high-performance CNG filling stations will be from 1.5 to 9 hours. Therefore, the disadvantage of the known technical solution is the long refueling time of the newly arrived GBA.

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

The technical result of the invention is the reduction of the refueling time of the 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 in the CNG filling station, consisting of a filter separator, a compressor unit, a gas accumulator block, a gas dehydration unit, at least two gas columns and a high-pressure gas supply line from a dehydration unit to a gas battery block and gas columns . An adjustment unit is installed on the high-pressure gas supply line, which, based on a signal from a pressure change sensor mounted in the high-pressure gas supply line, is designed to control shut-off valves restricting the supply of compressed natural gas to a gas station refueling a mobile automobile gas tanker.

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 of the prototype. In FIG. 2 shows a diagram of the proposed station. In FIG. 3 is a graph of pressure changes in a high pressure CNG station.

Famous 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 battery unit - 4, gas stations - 5, a high-pressure gas supply line - 6. In addition, the CNG filling station (Fig. 2) contains a pressure change sensor - 7, an adjustment unit - 8, stop valves - 9.

During operation of the proposed CNG filling 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 of the compressor unit (2), where it is compressed 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). The signal from the pressure change sensor (7) installed on the high pressure line (6) starts the adjustment unit (8), controlling the shutoff valves (9). Using shutoff valves, the CNG supply to the selected (or several selected) gas station is limited.

When high-capacity PAGZ is refueling at CNG filling stations (from 3,000 to 10,000 nm ³ ) and at the same time the newly arrived GBA starts refueling, a lack of pressure appears in the high-pressure gas supply line (6) to ensure fast filling of GBA. Therefore, according to the signal from the pressure change sensor (7), the adjustment unit (8) closes the shutoff valves (9), stopping the supply of CNG to the PAGZ gas station, thereby ensuring normal (fast) filling of the GBA. Upon completion of the filling of the GBA, the signal from the standard sensor entering the adjustment unit (8) opens the shutoff valves (9), resuming the supply of CNG for filling the PAGZ.

The pressure change sensor (7) can be made on the basis of an overpressure sensor for gas stations Sapphire-22-DI-2170, with a measurement range of 25 MPa with digital signal processing.

The adjustment unit (8) can be performed, for example, on the basis of a 16-bit microcontroller MSP430F149IPM PBF manufactured by TEXAS INSTRUMENTS.

Shut-off valves (9) can be implemented on the basis of an explosion-proof high pressure solenoid valve 25 MPa (250 kg / cm ² ) with feedback AIC 25MPA M36 / 2 manufactured by AIC.

A pressure change sensor (7) installed on the high-pressure line of the gas supply with a constant time interval of 10 seconds performs a pressure measurement by transmitting the measurement data to the adjustment unit (8). The adjustment unit (8) saves the last few values and calculates the difference between the subsequent and previous measurements in the high-pressure line of the gas supply. If GBA refueling begins, then from the standard sensor (not shown in FIG. 2) the CNG filling station (5) is given a signal to the adjustment unit to start refueling. In the high-pressure line of the gas supply, the control unit registers the pressure drop and generates a control action by which the shut-off valves are closed until the vehicle is refueled at the gas filling column (5). By the signal of the end of refueling from the standard sensor, the adjustment unit (8) generates a control action on the opening of the shutoff valves. Then refueling PAGZ resumes.

The settings of the adjustment unit (the interval of taking readings of the pressure change sensor, the values of the difference in readings at which the operation occurs) depend on the characteristics of the CNG filling stations, such as the capacity of the compressor unit and the amount of stored CNG in the battery unit.

The pressure change graph shows the dynamics of pressure changes (P, MPa) over time (t, sec) in the high-pressure station of the CNG filling station in the filling circuit of a newly arrived gas balloon car (GBA) and in the filling circuit of PAGZ. The graph also shows the moments of the beginning of filling the GBA, closing the shut-off valves, the end of the filling of the GBA with the opening of the shut-off valves and the resumption of refueling PAGZ.

The proposed invention allows to eliminate the disadvantage of the known CNG filling station, namely, it accelerates the refueling time (makes it possible to normal refuel) GBA during refueling PAGZ at CNG filling stations, thereby increasing the efficiency of gas engine fuel sales.

Thus, the pressure change sensor, the adjustment unit and the controlled shut-off valves installed on the high-pressure gas supply line allow either to limit or completely stop the CNG supply from the gas dehydration unit to the gas columns used to refuel the PAGZ and accelerate the simultaneous gas station GBA and PAGZ.

Claims (1)

Automobile gas-filling compressor station, consisting of a filter separator, compressor unit, gas accumulator unit, gas dehydration unit, at least two gas columns and a high pressure gas supply line from the dehydration unit to the gas accumulator block and gas columns, characterized in that an adjustment unit is installed on the high-pressure line of the gas supply, which is designed according to the signal received from the pressure change sensor mounted in the high-pressure line of the gas supply, ulation stop valves restricting flow of compressed natural gas to a gas column, to carry out refueling mobile gazozapravschika automobile.

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