Marine dual fuel engine gas booster station

Abstract

The present invention discloses a marine dual-fuel engine gas pressure station, including a pressure system, a recovery unit, a sewage unit, a discharge unit and a component analysis unit. The pressure system includes a pressure stabilizing skid, an air intake buffer tank, a compression unit, an air supply buffer tank and a drying unit connected in sequence. Natural gas containing impurities enters the recovery tank of the recovery unit, and then returns to the output end of the pressure stabilizing skid after being connected to the pressure regulator, thereby improving the utilization rate of natural gas. The sewage outlets of the pressure stabilizing skid, each tank body and the drying unit are connected to the sewage tank through a sewage pipeline. The respective discharge outlets of the above-mentioned equipment are connected to the bottom of the discharge tower through a flame arrester after merging through a discharge pipeline. The present invention has a compact structure, occupies a small space, and the output high-pressure natural gas has a stable pressure and pure components. The remaining natural gas in the present invention can be quickly vented, which improves the safety of the use of the present invention and ensures that the high-pressure natural gas of reliable quality is delivered to the marine dual-fuel engine.

Description

Technical Field

[0001] The present invention relates to a gas pressure station, in particular to a gas pressure station which integrates natural gas pressure, buffering and stabilizing pressure, emergency discharge, impurity discharge and component analysis, and provides high-quality and high-pressure natural gas to a marine dual-fuel engine, belonging to the technical field of marine dual-fuel engines. Background Art

[0002] With the adjustment of energy structure and the gradual implementation of energy conservation and emission reduction strategies, natural gas as a clean energy has been widely developed in the field of ship power, and marine dual-fuel (diesel engine + natural gas) engines have come into being. Natural gas must be pressurized and purified before it can be provided to marine dual-fuel engines. At present, the gas pressure boosting station for marine dual-fuel engines has the defects of unstable gas supply pressure and poor gas supply quality caused by the inability to separate natural gas impurities, which leads to unstable operation of dual-fuel engines, reduced maximum power, and even cylinder misfires. Therefore, it is urgent to provide a marine dual-fuel engine gas pressure boosting station to provide marine dual-fuel engines with a high-quality natural gas source with stable gas pressure and pure components. Summary of the invention

[0003] The object of the present invention is to provide a marine dual-fuel engine gas pressure station which improves the running stability and safety of the dual-fuel engine.

[0004] The present invention is achieved through the following technical solutions:

[0005] A marine dual-fuel engine gas pressure station, comprising a pressure system, a recovery unit, a sewage unit, a discharge unit and a component analysis unit, wherein the pressure system comprises a pressure stabilizing skid, an air intake buffer tank, a compression unit, an air supply buffer tank and a drying unit connected in sequence through a transmission pipeline, an electric stop valve and a flow meter are connected to the input end of the pressure stabilizing skid in sequence through a transmission pipeline, an output end of the pressure stabilizing skid is connected to the air intake buffer tank through a transmission pipeline, an output end of the air intake buffer tank is divided into two paths respectively connected to a first compressor and a second compressor of the compression unit, a transmission pipeline of a pure high-pressure natural gas output end of the first compressor and a pure high-pressure natural gas output end of the second compressor are merged into one path to enter the air supply buffer tank, and a pure high-pressure natural gas output end of the air supply buffer tank is divided into two paths respectively passing through a first drying skid and a second drying skid of the drying unit and then merged The first compressor and the second compressor are connected to the fuel tank of the marine dual-fuel engine in turn, and the natural gas output end containing impurities of the first compressor and the natural gas output end containing impurities of the second compressor are combined into one path, which enters the recovery tank of the recovery unit through the recovery pipeline, and the output end of the recovery tank is connected to the pressure regulator of the recovery unit through the recovery pipeline and then returns to the output end of the pressure stabilizing skid; the sewage outlets of the pressure stabilizing skid, the air intake buffer tank, the recovery tank, the air supply buffer tank, the first drying skid, the second drying skid and the cylindrical filter are combined into one path through the sewage pipeline and connected to the sewage tank of the sewage discharge unit; the discharge outlets of the pressure stabilizing skid, the air intake buffer tank, the recovery tank, the air supply buffer tank, the first drying skid and the second drying skid are combined into two paths through the release pipeline, which are respectively connected to the bottom of the discharge tower of the discharge unit through the flame arrester.

[0006] The purpose of the present invention is further achieved by the following technical solutions:

[0007] Furthermore, each input end and output end of the pressure stabilizing skid, air intake buffer tank, compression unit, air supply buffer tank, drying unit and component analysis unit is respectively provided with a ball valve.

[0008] Furthermore, the input pressure of the pressure stabilizing skid is 0.2-0.4Mpa, the output pressure is 0.2-0.3Mpa, the filtration precision is 10μm, the pressure regulation precision is ±2.5%, and the maximum flow rate is 7200 standard cubic meters / hour. The natural gas pressure input by the first compressor and the second compressor is 0.2-0.4Mpa, the output natural gas pressure of the first compressor output end and the second compressor output end is 1.6-1.8Mpa, and the gas supply is 6000 standard cubic meters / hour.

[0009] Furthermore, the water volume of the intake buffer tank is 6.0m 3 , water pressure is 1.0Mpa; water volume of air supply buffer tank is 10.0m 3 , the water pressure is 2.5Mpa. The water volume of the recovery tank is 4.0m 3, the water pressure is 2.5Mpa; the water volume of the sewage tank is 1.0m 3 , water pressure is 0.1Mpa.

[0010] The present invention integrates a pressurizing system, a recovery unit, a sewage discharge unit, a discharge unit and a component analysis unit in one, has a compact structure, occupies a small space, and outputs high-pressure natural gas with stable gas pressure and pure components. The two compressors of the pressurizing system and the two sets of drying skids of the drying unit are used as a backup, which improves the reliability of the present invention. The discharge ports of the pressure stabilizing skid, the air intake buffer tank, the recovery tank, the air supply buffer tank, the first drying skid and the second drying skid are connected to the discharge tower of the discharge unit through a discharge pipe. When encountering leakage or other sudden failures, the remaining natural gas in the present invention can be quickly emptied, which improves the safety of the use of the present invention. The gas chromatograph of the component analysis unit of the present invention can automatically sample and analyze the high-pressure natural gas to be delivered to the marine dual-fuel engine, and transmit the sampling data to the background sample gas processing system and detection and analysis system through the signal transmission system for calculation and analysis, and feedback to the gas chromatograph for display, further ensuring the reliability of the quality of the high-pressure natural gas delivered to the marine dual-fuel engine.

[0011] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] like Figure 1 As shown, the present invention includes a pressurizing system 1, a recovery unit 2, a sewage discharge unit 3, a discharge unit 4 and a component analysis unit 5. The pressurizing system 1 includes a pressure stabilizing skid 11, an air intake buffer tank 12, a compression unit 13, an air supply buffer tank 14 and a drying unit 15 connected in sequence through a delivery pipeline 10, and an electric stop valve 101 and a flow meter 102 are connected in sequence through Figure 1The delivery pipeline 10 shown by the thick solid line is connected to the input end 111 of the pressure stabilizing skid, and the output end 112 of the pressure stabilizing skid is connected to the air intake buffer tank 12 through the delivery pipeline 10. The output end 121 of the air intake buffer tank is divided into two paths, which are respectively connected to the first compressor 131 and the second compressor 132 of the compression unit 13. The delivery pipeline 10 of the first compressor pure high-pressure natural gas output end 133 and the second compressor pure high-pressure natural gas output end 134 are combined into one path to enter the air supply buffer tank 14. The pure high-pressure natural gas output end 141 of the air supply buffer tank is divided into two paths, which pass through the first drying skid 151 and the second drying skid 152 of the drying unit 15 respectively, and then merge into one path, which are successively connected to the chromatographic analyzer 51 of the component analysis unit 5, and then pass through the cylindrical filter 52 to the fuel tank of the marine dual-fuel engine. The natural gas output end 135 containing impurities of the first compressor and the natural gas output end 136 containing impurities of the second compressor are combined into one path through Figure 1 The recovery pipeline 20 shown by the double-dotted line enters the recovery tank 21 of the recovery unit 2. The recovery pipeline 20 at the recovery tank output end 211 is connected to the pressure regulator 22 of the recovery unit 2 and then returns to the output end 112 of the pressure stabilizing skid, thereby improving the utilization rate of natural gas. Figure 1 The sewage pipelines 30 shown by the dot-dash lines merge into one and are connected to the sewage tank 31 of the sewage unit.

[0015] The discharge ports of the pressure stabilizing skid 11, the air intake buffer tank 12, the recovery tank 21, the air supply buffer tank 14, the first drying skid 151 and the second drying skid 152 are respectively Figure 1 The discharge pipeline 40 shown by the thick dashed line is merged into two paths, which are respectively connected to the bottom of the discharge tower 42 of the discharge unit 4 through the flame arrester 41.

[0016] Each input end and output end of the pressure stabilizing skid 11, air intake buffer tank 12, compression unit 13, air supply buffer tank 14, drying unit 15 and component analysis unit 5 are respectively provided with a ball valve 6 to separate each unit and the corresponding tank body, to facilitate the maintenance of the failed unit and ensure the safety of the present invention.

[0017] The pressure stabilizing skid 11 includes two parallel filters 113, a pressure regulator 114 and a pressure stabilizing gas rail 115 fixed on the pressure stabilizing skid steel frame 112. The first drying skid 151 and the second drying skid 152 have the same structure, including a heater 154, a circulating fan 155, a cooler 156 and a filter 157 respectively fixed on the drying skid steel frame 153, and two parallel drying towers 158.

[0018] The pressure 111 at the input end of the pressure stabilizing skid is 0.2~0.4Mpa, the pressure 112 at the output end of the pressure stabilizing skid is 0.2~0.3Mpa, the filtration accuracy is 10μm, the pressure regulation accuracy is ±2.5%, and the maximum flow rate is 7200 standard cubic meters / hour.

[0019] The natural gas pressures input to the first compressor 131 and the second compressor 132 are both 0.2-0.4 MPa, the natural gas pressures output from the first compressor 131 and the second compressor 132 are both 1.6-1.8 MPa, and the gas supply volume is 6000 standard cubic meters per hour.

[0020] The water volume of the intake buffer tank 12 is 6.0m 3 , water pressure is 1.0Mpa; water volume of gas supply buffer tank 14 is 10.0m 3 , the water pressure is 2.5Mpa. The water volume of the recovery tank 21 is 4.0m 3 , the water pressure is 2.5Mpa; the water volume of the sewage tank 31 is 1.0m 3 , the water pressure is 0.1Mpa.

[0021] The working process of the present invention is as follows:

[0022] The city pipeline natural gas with a pressure of 0.2-0.4Mpa and a flow rate of 6000 standard cubic meters per hour passes through the electric stop valve 101 and the flow meter 102 in the direction shown by the arrow on the left end of Figure 1, and enters the pressure stabilizing skid 11 in sequence. After being output from the pressure stabilizing skid 11, it is divided into two paths through the air intake buffer tank 12, and is pressurized into pure high-pressure natural gas with a pressure of 1.6-1.8Mpa and a flow rate of 6000 standard cubic meters per hour by the first compressor 131 and the second compressor 132 of the compression unit 13, and is output from the two compressors and then merged into one path. After being stabilized by the air supply buffer tank 14, it is divided into two paths and enters the two drying skids of the drying unit 15 respectively. The pure high-pressure natural gas output from the drying unit 15 is analyzed by the chromatographic analyzer 51 of the component analysis unit 5 and filtered by the cylindrical filter 52 as shown in the figure. Figure 1 The fuel is transported to the fuel tank of the marine dual-fuel engine for use in the direction indicated by the arrow on the right.

[0023] The two compressors output natural gas containing impurities into the recovery tank 21. After a long period of sedimentation, the impurities accumulate at the bottom of the recovery tank 21. The natural gas in the recovery tank 21 after the precipitated impurities are returned from the recovery pipeline 20 to the pressure regulator 22. The pressure is reduced by the pressure regulator 22 to 0.2-0.4Mpa. The gas is combined with the natural gas output by the pressure stabilizing skid 11 and input into the compression unit 13. The aforementioned subsequent process is repeated to continue compressing and drying the natural gas.

[0024] The natural gas impurities precipitated at the bottom of the air intake buffer tank 12, the air supply buffer tank 14, the recovery tank 21, the first drying skid 151 and the second drying skid 152 can be concentrated into the sewage tank 31 through the sewage pipeline 30 for centralized discharge, thereby improving the purity of the high-pressure natural gas input to the marine dual-fuel engine and ensuring the normal operation of the dual-fuel engine.

[0025] When leakage or other sudden failure occurs, the electric stop valve 101 is quickly closed, and the natural gas released from the respective discharge ports of the pressure stabilizing skid 11, the first compressor 131, the second compressor 132, the air intake buffer tank 12, the recovery tank 21, the air supply buffer tank 14, the first drying skid 151 and the second drying skid 152 is discharged through Figure 1 The release pipeline 40 shown by the thick dashed line is combined into two paths, which are cooled by the flame arrester 41 and then released from the release tower 42, so as to evacuate the natural gas in the present invention and ensure the safety of the present invention.

[0026] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A marine dual-fuel engine gas booster station, characterized in that: The invention comprises a pressurizing system, a recovery unit, a sewage discharge unit, a discharge unit and a component analysis unit. The pressurizing system comprises a pressure stabilizing skid, an air intake buffer tank, a compression unit, an air supply buffer tank and a drying unit which are sequentially connected through a transmission pipeline. An electric stop valve and a flow meter are sequentially connected to an input end of the pressure stabilizing skid through a transmission pipeline. An output end of the pressure stabilizing skid is connected to an air intake buffer tank through a transmission pipeline. An output end of the air intake buffer tank is divided into two paths which are respectively connected to a first compressor and a second compressor of the compression unit. The transmission pipelines of a pure high-pressure natural gas output end of the first compressor and a pure high-pressure natural gas output end of the second compressor are merged into one path to enter the air supply buffer tank. The pure high-pressure natural gas output end of the air supply buffer tank is divided into two paths which are respectively merged into one path through a first drying skid and a second drying skid of the drying unit and sequentially connected to the component analyzer. The gas is connected to the chromatographic analyzer of the analysis unit and then leads to the fuel tank of the marine dual-fuel engine through the cartridge filter; the natural gas output end containing impurities of the first compressor and the natural gas output end containing impurities of the second compressor are combined into one path and enter the recovery tank of the recovery unit through the recovery pipeline, and the output end of the recovery tank is connected to the pressure regulator of the recovery unit through the recovery pipeline and then returns to the output end of the pressure stabilizing skid; the sewage outlets of the pressure stabilizing skid, the air intake buffer tank, the recovery tank, the air supply buffer tank, the first drying skid, the second drying skid and the cartridge filter are respectively combined into one path and connected to the sewage tank of the sewage discharge unit through the sewage discharge pipeline; the discharge outlets of the pressure stabilizing skid, the air intake buffer tank, the recovery tank, the air supply buffer tank, the first drying skid and the second drying skid are respectively combined into two paths through the venting pipeline and connected to the bottom of the discharge tower of the discharge unit through the flame arrester; Each input end and output end of the pressure stabilizing skid, air intake buffer tank, compression unit, air supply buffer tank, drying unit and component analysis unit are respectively provided with a ball valve; The pressure at the input end of the voltage stabilizer is 0.2-0.4Mpa, the pressure at the output end of the voltage stabilizer is 0.2-0.3Mpa, the filtration accuracy is 10μm, the pressure regulation accuracy is ±2.5%, and the maximum flow rate is 7200 standard cubic meters / hour; The natural gas pressure input by the first compressor and the second compressor is 0.2-0.4 MPa, the natural gas pressure output by the first compressor and the second compressor is 1.6-1.8 MPa, and the gas supply is 6000 standard cubic meters per hour; The air pressure at the input end of the drying skid is 1.8-2.0 MPa, and the natural gas flow rate processed is 6000 standard cubic meters per hour.

2. The marine dual-fuel engine gas booster station according to claim 1, characterized in that: The water volume of the intake buffer tank is 6.0m 3 , the water pressure is 1.0Mpa; the water volume of the gas supply buffer tank is 10.0m 3 , the water pressure is 2.5Mpa.

3. The marine dual-fuel engine gas booster station according to claim 1, characterized in that: The water volume of the recovery tank is 4.0m 3 , the water pressure is 2.5Mpa; the water volume of the sewage tank is 1.0m 3 , the water pressure is 0.1Mpa.

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