Two-way cng unloading column system

Abstract

The invention provides a double-path CNG gas unloading column system which comprises a gas dispenser, a compressor, a first parking stall gas unloading port, a second parking stall gas unloading port, a first pipeline connected between the first parking stall gas unloading port and the gas dispenser, a second pipeline connected between the first parking stall gas unloading port and the compressor, a third pipeline connected between the second parking stall gas unloading port and the gas dispenser, a fourth pipeline connected between the second parking stall gas unloading port and the compressor, a first control valve, a second control valve, a third control valve, a fourth control valve, a first pressure measuring device, a second pressure measuring device and a control device, wherein the first control valve is arranged on the first pipeline, the second control valve is arranged on the second pipeline, the third control valve is arranged on the third pipeline, and the fourth control valve is arranged on the fourth pipeline; the first pressure measuring device is used for measuring the pressure at the first parking stall gas unloading port; the second pressure measuring device is used for measuring the pressure at the second parking stall gas unloading port; and the control device is used for receiving measurement data and controlling opening-closing switching of each control valve according to the corresponding measurement data. By simultaneously unloading gas, the double-path CNG gas unloading column system is beneficial to saving the cost and improves the gas unloading running efficiency.

Description

technical field [0001] The invention relates to CNG (Compressed Natural Gas, compressed natural gas) unloading technology, in particular to a dual-channel CNG unloading column system. Background technique [0002] CNG is natural gas pressurized and stored in a gaseous container. Vehicle-mounted CNG gas cylinders need to be refilled at corresponding CNG filling stations, and when the vehicle needs to stop running for a period of time, the CNG gas in the CNG gas cylinder must be unloaded. gas. The existing relatively simple way of unloading gas is to release the internal pressure of the gas cylinder by deflation, but there is gas waste and hazards such as pollution or fire. At present, the more popular way is to output the natural gas in the gas cylinder through the gas unloading column And decompress and compress to recycle the CNG in the cylinder. [0003] However, at present, the natural gas unloading columns of CNG filling stations can only unload gas in a single way. Ev...

AI Technical Summary

Problems solved by technology

The existing relatively simple unloading method is to release the internal pressure of the gas cylinder by deflation, but there is gas waste and hazards such as pollution or fire. At present, the more popular method is to output the natural gas in the cylinder through the gas unloading column And decompress and compress to recycle the CNG in the cylinder

[0003] However, at present, the natural gas unloading columns of CNG filling stations can only unload gas in a single way. Even if it is a two-way unloading, the two lines are not related. Each pipeline carries out independent gas transmission for each parking space, which is different from the fact that the single-way unloading is equivalent to

In general, the current unloading columns have low unloading efficiency and inflexible usage methods

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