Pressure reducing system for fuel gas and natural gas dewaxing vehicle
First Claim
1. A fuel gas pressure reducing system comprising a fuel gas pipeline,wherein along a flow direction of fuel gas, the fuel gas pipeline comprises a high pressure pipeline, a medium pressure pipeline and a low pressure pipeline which are successively connected,wherein the high pressure pipeline is provided with a high pressure gas supply valve and a first stage pressure reducing valve assembly, and the first stage pressure reducing valve assembly comprises two pressure reducing valves connected in parallel, wherein a cut-off valve is provided upstream and downstream of each of the pressure reducing valve, respectively, and a beginning end of the high pressure pipeline is connected to a gas storage device;
- wherein the medium pressure pipeline is provided with a second stage pressure reducing valve; and
wherein the low pressure pipeline is provided with a third stage pressure reducing valve;
wherein the high pressure pipeline is further provided with a heat exchanger, the heat exchanger is located upstream of the first stage pressure reducing valve assembly;
wherein the high pressure pipeline is further provided with a high pressure relief valve, the medium pressure pipeline is further provided with a medium pressure relief valve, and the low pressure pipeline is further provided with a low pressure relief valve; and
wherein along the flow direction of the fuel gas, the high pressure pipeline downstream of the high pressure relief valve is provided with a tee joint, three gas ports of the tee joint are respectively connected to the gas storage device, the high pressure gas supply valve and a gas charging valve, a cut-off valve is connected between the gas charging valve and the tee joint in series;
the high pressure pipeline between the tee joint and the high pressure gas supply valve is provided with a high pressure manometer;
the high pressure pipeline between the high pressure gas supply valve and the heat exchanger is provided with a high pressure shut-off valve and a filter connected in series;
the medium pressure pipeline between the medium pressure relief valve and the second stage pressure reducing valve is provided with a medium pressure manometer;
the low pressure pipeline upstream of the low pressure relief valve is provided with a low pressure manometer;
the low pressure pipeline between the low pressure relief valve and the third stage pressure reducing valve is provided with a low pressure gas supply valve and a flowmeter connected in series.
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Accused Products
Abstract
A pressure reducing system for fuel gas and a natural gas dewaxing vehicle are provided. The pressure reducing system includes fuel gas pipelines which consist of successively connected a high pressure pipeline, a medium pressure pipeline and a low pressure pipeline in the flow direction of fuel gas. The tail end of the low pressure pipeline connects with a combustion apparatus. A high pressure relief valve, a high pressure air feed valve, a heat exchanger and a primary pressure reducing valve subassembly are connected on the high pressure pipeline. The heat exchanger is provided with a hot fluid inlet and a hot fluid outlet, where the hot fluid inlet connects with a hot water apparatus, and the hot fluid outlet connects with a water storage apparatus. The medium pressure pipeline is equipped with a medium pressure relief valve and a secondary pressure reducing valve.
17 Citations
7 Claims
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1. A fuel gas pressure reducing system comprising a fuel gas pipeline,
wherein along a flow direction of fuel gas, the fuel gas pipeline comprises a high pressure pipeline, a medium pressure pipeline and a low pressure pipeline which are successively connected, wherein the high pressure pipeline is provided with a high pressure gas supply valve and a first stage pressure reducing valve assembly, and the first stage pressure reducing valve assembly comprises two pressure reducing valves connected in parallel, wherein a cut-off valve is provided upstream and downstream of each of the pressure reducing valve, respectively, and a beginning end of the high pressure pipeline is connected to a gas storage device; -
wherein the medium pressure pipeline is provided with a second stage pressure reducing valve; and wherein the low pressure pipeline is provided with a third stage pressure reducing valve; wherein the high pressure pipeline is further provided with a heat exchanger, the heat exchanger is located upstream of the first stage pressure reducing valve assembly; wherein the high pressure pipeline is further provided with a high pressure relief valve, the medium pressure pipeline is further provided with a medium pressure relief valve, and the low pressure pipeline is further provided with a low pressure relief valve; and wherein along the flow direction of the fuel gas, the high pressure pipeline downstream of the high pressure relief valve is provided with a tee joint, three gas ports of the tee joint are respectively connected to the gas storage device, the high pressure gas supply valve and a gas charging valve, a cut-off valve is connected between the gas charging valve and the tee joint in series;
the high pressure pipeline between the tee joint and the high pressure gas supply valve is provided with a high pressure manometer;
the high pressure pipeline between the high pressure gas supply valve and the heat exchanger is provided with a high pressure shut-off valve and a filter connected in series;
the medium pressure pipeline between the medium pressure relief valve and the second stage pressure reducing valve is provided with a medium pressure manometer;
the low pressure pipeline upstream of the low pressure relief valve is provided with a low pressure manometer;
the low pressure pipeline between the low pressure relief valve and the third stage pressure reducing valve is provided with a low pressure gas supply valve and a flowmeter connected in series. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification