Hydrogenation system for improving unloading rate of tank car

Abstract

The utility model discloses a hydrogenation system for improving unloading rate of a tank car, which comprises a gas unloading column, a compressor pry, a sequence control panel, a hydrogen storage device and a hydrogenation machine, the compressor pry comprises a low-pressure compressor pry and a high-pressure compressor pry, and the hydrogen storage device comprises a first hydrogen storage bottle group and a second hydrogen storage bottle group. The low-pressure compressor pry and the high-pressure compressor pry correspond to different pressurization requirements respectively, the first hydrogen storage bottle set directly stores pressurized hydrogen of the low-pressure compressor pry, the second hydrogen storage bottle set is used for storing and switching hydrogen from low pressure to high pressure, and the conveying direction of the hydrogen is selected through the sequence control panel. The process flow formed by using the whole hydrogenation system for improving the unloading rate of the tank car is simple, efficient, energy-saving, compact in device and stable in operation, and the utilization rate of the hydrogen supply transportation tank car is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure hydrogen gas filling technical field more specifically, the utility model relates to a kind of hydrogenation system for improving tank car unloading rate. BACKGROUND

[0002] At present, most of the hydrogenation stations built in China use long pipe trailer hydrogen supply mode, according to the relevant laws and regulations of the state, the transport pressure of long pipe trailer is 20 MPa, most of the hydrogenation stations are equipped with compressors with minimum inlet pressure of 5 MPa, and some even reach 6.5 MPa, resulting in excessive residual pressure of long pipe trailer, reducing transportation efficiency and increasing transportation cost of hydrogen. SUMMARY

[0003] The utility model aims to provide a kind of hydrogenation system for improving tank car unloading rate to solve the technical problem of insufficient hydrogen supply utilization rate of the hydrogenation system in the prior art to the transport tank car.

[0004] In order to realize these purposes and other advantages according to the utility model, a kind of hydrogenation system for improving tank car unloading rate is provided, which comprises a gas unloading column, a compressor pry, a sequence control panel, a hydrogen storage device and a hydrogenation machine. The gas unloading column is used to connect the tank car and transport the hydrogen on the tank car to the compressor pry. The compressor pry includes a low-pressure compressor pry and a high-pressure compressor pry. The hydrogen storage device includes a first hydrogen storage bottle group and a second hydrogen storage bottle group. The first hydrogen storage bottle group is used to store hydrogen after pressure boosting of the low-pressure compressor pry and simultaneously provide gas source for the high-pressure compressor pry. The high-pressure compressor pry is used to boost the hydrogen to target high-grade pressure. The second hydrogen storage bottle group is used to store sub-hydrogen storage bottle groups with high, medium and low pressure values. The high pressure value is the same as the target high-grade pressure, the low pressure value is the same as the pressure boosting pressure of the low-pressure compressor pry, and the medium pressure value is a set pressure between the high pressure value and the low pressure value. The outlets of the low-pressure compressor pry and the high-pressure compressor pry are respectively communicated with the inlet of the sequence control panel. The outlet of the sequence control panel is respectively communicated with the inlet of the first hydrogen storage bottle group and each sub-hydrogen storage bottle group. The outlet of the sequence control panel is also connected with the inlet of the hydrogenation machine. The outlet of the hydrogenation machine is connected with the filling vehicle.

[0005] Preferably, the low-pressure compressor pry and the high-pressure compressor pry are respectively connected with a water cooler for pre-cooling the inlet air and cooling the exhaust air of the low-pressure compressor pry or the high-pressure compressor pry. The hydrogenation machine is connected with a refrigerator for pre-cooling the filling hydrogen.

[0006] Preferably, the front and rear of the vent line safety valve of the first hydrogen storage bottle group and each sub-hydrogen storage bottle group are respectively provided with a full-bore shut-off valve and a safety valve auxiliary line. The full-bore shut-off valve has a manual switch and an electric switch. The electric switch is communicatively connected with a remote control terminal to realize remote venting.

[0007] Preferably, an emergency shut-off valve and a mass flow meter are arranged on the inlet pipe of the unloading column.

[0008] Preferably, the volume ratio of the high-pressure sub-hydrogen storage bottle group, the medium-pressure sub-hydrogen storage bottle group and the low-pressure sub-hydrogen storage bottle group of the first hydrogen cylinder group and the second hydrogen cylinder group is 3:2:3:4.

[0009] The hydrogenation system for improving tank car unloading rate of the utility model at least has the following beneficial effects: the hydrogenation system for improving tank car unloading rate of the utility model comprises an unloading column, a compressor pry, a sequence control panel, a hydrogen storage device and a hydrogenation machine, the compressor pry comprises a low-pressure compressor pry and a high-pressure compressor pry, the hydrogen storage device comprises a first hydrogen cylinder group and a second hydrogen cylinder group, the low-pressure compressor pry and the high-pressure compressor pry correspond to different pressure increasing requirements respectively, the first hydrogen cylinder group directly stores the pressurized hydrogen of the low-pressure compressor pry, and the second hydrogen cylinder group is used for hydrogen storage and switching from low pressure to high pressure, the sequence control panel is used for selecting the delivery direction of hydrogen, the process flow formed by the hydrogenation system for improving tank car unloading rate is simple, efficient and energy-saving, the device is compact and stable in operation, and the utilization rate of the hydrogen supply transport tank car is effectively improved.

[0010] Other advantages, objects and features of the utility model will be embodied in part by the following description, and will be understood by those skilled in the art through research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural connection schematic view of the hydrogenation system for improving tank car unloading rate of the utility model.

[0012] Figure 2 It is a structural connection schematic view of the sequence control panel of the utility model.

[0013] The description of the drawings is as follows: 1, tank car, 2, unloading column, 3, low-pressure compressor pry, 4, high-pressure compressor pry, 5, sequence control panel, 6, hydrogen storage device, 7, hydrogenation machine, 8, first hydrogen cylinder group, 9, low-pressure sub-hydrogen storage bottle group, 10, medium-pressure sub-hydrogen storage bottle group, 11, high-pressure sub-hydrogen storage bottle group, 12, water chiller, 13, refrigerator. DETAILED DESCRIPTION

[0014] The utility model will be further described in detail in combination with the drawings, so that those skilled in the art can implement according to the description.

[0015] In the description of the utility model, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0016] As shown in Figure 1 , Figure 2 The utility model discloses a hydrogenation system that improves tank car unloading rate, including unloading column 2, compressor pry, sequence control disc 5, hydrogen storage device 6, hydrogenation machine 7, unloading column 2 is used to connect tank car 1 and transports hydrogen on tank car 1 to compressor pry, and compressor pry includes low pressure compressor pry 3, high pressure compressor pry 4, and hydrogen storage device 6 includes first hydrogen storage bottle group 8 and second hydrogen storage bottle group, and first hydrogen storage bottle group 8 is used to store the hydrogen of low pressure compressor pry 3 after pressurization, and simultaneously provides gas source for high pressure compressor pry 4, and high pressure compressor pry 4 is used to pressurize hydrogen to target high-grade pressure, and second hydrogen storage bottle group is used to store the hydrogen of high pressure, medium pressure, low pressure three pressure values sub hydrogen storage bottle group, wherein high pressure value is same with target high-grade pressure, low pressure value is same with the pressurization pressure of low pressure compressor pry 3, and medium pressure value is the set pressure between high pressure value and low pressure value, and the outlet of low pressure compressor pry 3 and high pressure compressor pry 4 is communicated with the inlet of sequence control disc 5 respectively, and the outlet of sequence control disc 5 is communicated with the inlet of first hydrogen storage bottle group 8 and each sub hydrogen storage bottle group respectively, and the outlet of sequence control disc 5 is also connected with the inlet of hydrogenation machine 7, and the outlet of hydrogenation machine 7 is connected with filling vehicle.

[0017] Through low pressure compressor pry 3, hydrogen is pressurized to 20MPa, and through high pressure compressor pry 4, hydrogen is pressurized to 45MPa, the inlet of unloading column 2 is communicated with the outlet of tank car 1, the outlet of unloading column 2 is communicated with the pipeline of low pressure compressor pry 3 and high pressure compressor pry 4 through pipeline, first hydrogen storage bottle group 8 is set as 20MPa hydrogen storage bottle group, and is composed of 3 water volume 1m 3 Bottle group, and first hydrogen storage bottle group 8 mainly stores the hydrogen of low pressure compressor pry 3 after pressurization, and the maximum storage pressure of second hydrogen storage bottle group is 45MPa, and is composed of 9 water volume 1m 3The bottle group is divided into three groups of high, medium and low pressure, the second hydrogen storage bottle group mainly stores hydrogen gas pressurized by the high-pressure compressor skid 4 to meet the requirement of taking gas at 35 MPa filling pressure, the sequence control panel 5 is used to connect the gas discharge column 2 and the hydrogen filling machine 7, the compressor skid and the hydrogen storage device 6, and the sequence control panel 5 is equivalent to connecting four groups of hydrogen storage bottles, which is composed of 15 pneumatic valves, 4 pressure transmitters and 7 one-way valves, and has a nitrogen purging and replacement port to meet the requirements of taking gas at low, medium and high levels of the hydrogen filling machine 7 and the requirements of taking gas from the 20 MPa hydrogen storage bottle group by the high-pressure compressor skid 4, and the hydrogen gas switching function of the 45 MPa hydrogen storage bottle group.

[0018] A process method for improving the unloading rate of the tank truck 1 by using the hydrogen filling system for improving the unloading rate of the tank truck 1 of the embodiment comprises the following steps:

[0019] S1, the highest pressure in the tank truck 1 is 20 MPa hydrogen gas which is initially taken into the compressor skid and then into the hydrogen storage device 6 after being pressurized;

[0020] S21, when the hydrogen pressure in the tank truck 1 is higher than 10 MPa, the hydrogen is pressurized to 45 MPa by the high-pressure compressor skid 4 and stored in the 45 MPa high-pressure sub-hydrogen storage bottle group 11;

[0021] S22, when the hydrogen pressure in the tank truck 1 is lower than 10 MPa, the hydrogen is pressurized to 20 MPa by the low-pressure compressor skid 3 and stored in the 20 MPa first hydrogen storage bottle group 8, and the compressor inlet pressure is as low as 2 MPa;

[0022] S3, the hydrogen filling machine 7 takes gas from the low, medium and high pressure sub-hydrogen storage bottle groups 11 of the 45 MPa second hydrogen storage bottle group in sequence through the sequence control 5 to fill the hydrogen storage bottle of the hydrogen fuel cell vehicle;

[0023] S31, when the vehicle filling peak, the pressure of the second hydrogen storage bottle group drops quickly, the high-pressure compressor skid 4 takes gas from the 20 MPa first hydrogen storage bottle group 8 to increase the gas filling rate of the second hydrogen storage bottle group and improve the filling speed of the whole station;

[0024] S32, when the vehicle filling peak, the pressure of the first hydrogen storage bottle group 8 is low, the high-pressure compressor skid 4 takes gas from the low-pressure sub-hydrogen storage bottle group 9 of the second hydrogen storage bottle group to the high-pressure sub-hydrogen storage bottle group 11 to ensure that the filling vehicle can be filled.

[0025] The utility model discloses a improve tank truck 1 unloading rate hydrogenation system including unloading column 2, compressor pry, sequence control disc 5, hydrogen storage device 6, hydrogenation machine 7, and the compressor pry includes low pressure compressor pry 3, high pressure compressor pry 4, and hydrogen storage device 6 includes first hydrogen storage bottle group 8 and second hydrogen storage bottle group, and low pressure compressor pry 3,high pressure compressor pry 4 correspond to different pressure increasing demand respectively, and first hydrogen storage bottle group 8 directly stores the hydrogen gas of low pressure compressor pry 3 pressure increasing, and second hydrogen storage bottle group is used for hydrogen gas storage and switching from low pressure to high pressure, and the delivery direction of hydrogen gas is selected through sequence control disc 5, and the whole improve tank truck 1 unloading rate hydrogenation system forms simple process flow, and it is energy -conserving, compact, and runs stably.

[0026] In another technical solution, as shown in Figures 1-2 The low pressure compressor pry 3, the high pressure compressor pry 4 are connected with the water cooler 12 respectively, are used for the precooling of the air inlet of low pressure compressor pry 3 or high pressure compressor pry 4 and the cooling of exhaust, and the hydrogenation machine 7 is connected with the refrigerator 13, is used for precooling hydrogen filling.

[0027] In another technical solution, as shown in Figures 1-2 The first hydrogen storage bottle group 8, the front and rear of the vent line safety valve of each sub hydrogen storage bottle group are respectively provided with full-bore cut-off valve and safety valve auxiliary line, the full-bore cut-off valve has manual switch and electric switch, wherein the electric switch is communicatively connected with remote control terminal, realizes remote control or on-site manual emergency venting.

[0028] In another technical solution, as shown in Figures 1-2 An emergency cut-off valve and mass flow meter are arranged on the inlet pipeline of the unloading column 2, the hydrogen delivery flow is grasped, and necessary safety protection valve measures are arranged.

[0029] In another technical solution, as shown in Figures 1-2 The front and rear of each vent line safety valve of the second hydrogen bottle group are also respectively provided with a full-bore cut-off valve and a safety valve auxiliary line, remote control or on-site manual emergency venting is realized, and the volume ratio of the high pressure sub hydrogen storage bottle group 11, the medium pressure sub hydrogen storage bottle group 10 and the low pressure sub hydrogen storage bottle group 9 of the first hydrogen bottle group and the second hydrogen bottle group is 3:2:3:4.

[0030] Although the embodiments of the utility model have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, it can be fully applied to various fields suitable for the utility model, and other modifications can be easily realized by those skilled in the art, therefore, the utility model is not limited to specific details and the drawings shown and described herein without departing from the general concept defined by the claims and equivalent scope.

Claims

1. A hydrogen refueling system for improving tank truck unloading efficiency, characterized in that, The system includes an unloading column, a compressor skid, a sequence control panel, a hydrogen storage device, and a hydrogen refueling machine. The unloading column connects to the tanker truck and delivers the hydrogen from the tanker truck to the compressor skid. The compressor skid includes a low-pressure compressor skid and a high-pressure compressor skid. The hydrogen storage device includes a first hydrogen storage cylinder group and a second hydrogen storage cylinder group. The first hydrogen storage cylinder group stores the hydrogen pressurized by the low-pressure compressor skid and provides a gas source to the high-pressure compressor skid. The high-pressure compressor skid pressurizes the hydrogen to the target high-pressure level. The second hydrogen storage cylinder group stores sub-hydrogen storage cylinder groups with three pressure values: high pressure, medium pressure, and low pressure. The high pressure value is the same as the target high-pressure level, the low pressure value is the same as the pressurization pressure of the low-pressure compressor skid, and the medium pressure value is a set pressure between the high pressure value and the low pressure value. The outlets of the low-pressure compressor skid and the high-pressure compressor skid are connected to the inlet of the sequence control panel, which in turn is connected to the inlet of the first hydrogen storage cylinder group and each sub-hydrogen storage cylinder group. The outlet of the sequence control panel is also connected to the inlet of the hydrogen refueling machine, which is connected to the refueling vehicle.

2. The hydrogen refueling system for improving tank truck unloading rate as described in claim 1, characterized in that, The low-pressure compressor skid and the high-pressure compressor skid are respectively connected to chillers for pre-cooling the intake air and cooling the exhaust air of the low-pressure compressor skid or the high-pressure compressor skid. The hydrogen refueling machine is connected to a refrigeration unit for pre-cooling and refueling hydrogen.

3. The hydrogen refueling system for improving tank truck unloading rate as described in claim 1, characterized in that, The first hydrogen storage cylinder group and each of the sub-hydrogen storage cylinder groups are equipped with a full-bore shut-off valve and a safety valve bypass line before and after the venting pipeline safety valve, respectively. The full-bore shut-off valve has a manual switch and an electric switch, wherein the electric switch is connected to a remote control terminal to realize remote operation for venting.

4. The hydrogen refueling system for improving tank truck unloading rate as described in claim 1, characterized in that, An emergency shut-off valve and a mass flow meter are installed on the inlet pipe of the unloading column.

5. The hydrogen refueling system for improving tank truck unloading rate as described in claim 1, characterized in that, The volume ratio of the high-pressure hydrogen storage cylinder group, the medium-pressure hydrogen storage cylinder group, and the low-pressure hydrogen storage cylinder group in the first group of hydrogen cylinders and the second group of hydrogen cylinders is 3:2:3:4.

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