Combined type hydrogen compressor staged compression control system

Abstract

The utility model relates to the field of gas compression, in particular to a combined type hydrogen compressor staged compression control system which comprises a hydrogen pressurization system, a hydraulic station power system, a cooling system, a nitrogen system, a centralized diffusion pipeline system, a power distribution system and a control system. An instrument gas inlet is formed in the front end of the nitrogen system, and the centralized diffusion pipeline system is divided into a low-pressure centralized diffusion pipe opening and a high-pressure centralized diffusion pipe opening. The double-acting hydraulic-driven piston compressor has the advantages that the double-acting hydraulic-driven piston compressors are designed in series, compared with two-stage or three-stage hydraulic-driven piston compressors with the same specification and number, the displacement is large, the displacement can be calculated according to the front-back pressure ratio of each stage, the time for driving the reversing valve is controlled, the front displacement and the back displacement tend to be consistent, and the working efficiency is improved. The compressor is low in energy consumption, more economical, reasonable in structure and more compact, and can also be different from the design that a buffer tank is additionally arranged between two compressors in series connection.

Description

Technical Field

[0001] The utility model relates to the field of gas compression, in particular to a combined hydrogen compressor staged compression control system. Background Art

[0002] The hydrogen compressor system is a hydrogen boosting equipment that integrates hydrogen boosting system, hydraulic station power system, cooling system, nitrogen system, centralized discharge pipeline system, power distribution system and control system. It is widely used in hydrogen refueling stations, gas filling stations, pressure testing institutions, etc.

[0003] Common staged booster compressor control systems are mostly single compressor two-stage or three-stage designs. The advantage is simple control. The disadvantages are: (1) small exhaust volume. Although it can be designed by connecting multiple compressors in parallel, the energy consumption will increase greatly; (2) two-stage or three-stage cylinder design, the compression ratio of each stage is different, but the cooling water temperature and cylinder cooling channel are the same, which will inevitably lead to inconsistent piston seal life and low economic efficiency to a certain extent. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a combined hydrogen compressor staged compression control system to effectively solve the problems in the background technology.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a combined hydrogen compressor staged compression control system, including a hydrogen boosting system, a hydraulic station power system, a cooling system, a nitrogen system, a centralized discharge pipeline system, a power distribution system and a control system. The front end of the hydrogen boosting system is provided with a hydrogen inlet, and the rear end is provided with a hydrogen outlet. The front end of the nitrogen system is provided with an instrument gas inlet, and the centralized discharge pipeline system is divided into a low-pressure centralized discharge pipe port and a high-pressure centralized discharge pipe port.

[0006] Furthermore, the hydrogen boosting system is connected in sequence from the hydrogen inlet to an inlet pneumatic valve, a first pipeline safety valve, a pre-filter, a first compressor, a first hydrogen cooler, a second pipeline safety valve, a second compressor, a second hydrogen cooler, a third pipeline safety valve, a post-filter, a manual relief valve and an outlet pneumatic valve.

[0007] Furthermore, the first compressor performs a first-stage compression of hydrogen, and the second compressor performs a second-stage pressurization of hydrogen. During the process, the hydrogen is cooled by the first hydrogen cooler and the second hydrogen cooler and then enters a subsequent storage unit.

[0008] Furthermore, the power required for the first compressor and the second compressor to perform reciprocating motion is provided by the hydraulic station power system.

[0009] Furthermore, the low-pressure centralized discharge pipe port is connected to the first pipeline safety valve, the first compressor and the second compressor through a pipeline.

[0010] Furthermore, the high-pressure centralized relief pipe port is connected to the second pipeline safety valve, the third pipeline safety valve and the manual relief valve through a pipeline.

[0011] Furthermore, the cooling system is provided with circulating cooling water by an external cooler.

[0012] Furthermore, the nitrogen system is divided into two parts: replacement gas and drive gas. The replacement gas includes an inlet ball valve, a check ball valve and a stop valve, and the drive gas includes an inlet pressure regulating filter and a drive solenoid valve.

[0013] The beneficial effect of the utility model is that the double-acting liquid-driven piston compressors used in series design have a larger exhaust volume than two-stage or three-stage liquid-driven piston compressors of the same specification and quantity. The exhaust volume can be calculated by the front-to-back pressure ratio of each stage, and the driving time of the reversing valve can be controlled to make the front and rear exhaust volumes tend to be consistent. The energy consumption is relatively low, it is more economical, the structure is reasonable, and it is more compact. It can also be distinguished from the design of adding a buffer tank in series between two compressors. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the structure of the combined hydrogen compressor staged compression control system in the embodiment of the utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the hydrogen boosting system in the embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the nitrogen system in the embodiment of the utility model;

[0018] Figure 4 This is a structural schematic diagram of the centralized and dispersed pipeline system in the embodiment of the utility model;

[0019] Figure 5 A schematic diagram of an external coolant in an embodiment of the utility model;

[0020] Figure 6 It is a schematic diagram of the hydraulic station power system in the embodiment of the utility model.

[0021] Figure numerals: 1, hydrogen boosting system; 2, hydraulic station power system; 3, cooling system; 4, nitrogen system; 5, centralized release pipeline system; 6, power distribution system; 7, control system; 8, hydrogen inlet; 9, hydrogen outlet; 10, instrument gas inlet; 11, low-pressure centralized release pipe outlet; 12, high-pressure centralized release pipe outlet; 13, inlet pneumatic valve; 14, first pipeline safety valve; 15, pre-filter; 16, first compressor; 17, first Hydrogen cooler; 18, second pipeline safety valve; 19, second compressor; 20, second hydrogen cooler; 21, third pipeline safety valve; 22, post-filter; 23, manual relief valve; 24, outlet pneumatic valve; 25, external cooler; 26, inlet ball valve; 27, check ball valve; 28, stop valve; 29, inlet pressure regulating filter; 30, drive solenoid valve; 31, purge gas inlet; N7, cooling water inlet; N8, cooling water outlet; CW1, first cooling water inlet; CW2, first cooling water outlet; CW3, second cooling water inlet; CW4, second cooling water outlet; CW5, third cooling water inlet; CW6, third cooling water outlet; CW7, fourth cooling water inlet; CW8, fourth cooling water outlet; CW9, fifth cooling water inlet; CW10, fifth cooling water outlet. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] like Figures 1 to 6The combined hydrogen compressor staged compression control system shown includes a hydrogen boosting system 1, a hydraulic station power system 2, a cooling system 3, a nitrogen system 4, a centralized discharge pipeline system 5, a power distribution system 6 and a control system 7. The hydrogen boosting system 1 is provided with a hydrogen inlet 8 at the front end and a hydrogen outlet 9 at the rear end. The nitrogen system 4 is provided with an instrument gas inlet 10 at the front end. The centralized discharge pipeline system 5 is divided into a low-pressure centralized discharge pipe outlet 11 and a high-pressure centralized discharge pipe outlet 12.

[0026] In the present utility model, the hydrogen boosting system 1 is mainly used to boost the inlet low-pressure hydrogen and obtain the required high-pressure hydrogen at the outlet. The hydraulic station power system 2 is mainly used to provide driving power for the liquid-driven piston compressor to make the compressor perform reciprocating motion. The cooling system 3 is mainly used to cool the hydrogen before compression, the hydrogen during compression, the hydrogen after compression, the hydraulic oil of the oil return pipeline, and the outer surface of the inner cylinder of the compressor to ensure the long-term effective operation of the system. The nitrogen system 4 is mainly used to replace the pipeline air when the system is started for the first time, replace the hydrogen pipeline with hydrogen during maintenance, and provide the driving air source required for the system pneumatic control valve. The centralized release pipeline system 5 is mainly used to centrally release the over-pressure discharge hydrogen before and after compression and the replacement exhaust gas. The power distribution system 6 is mainly used to provide the safe power supply required for the operation of the equipment (supporting equipment). The control system 7 is mainly used to collect data from each link in the operation of the equipment and perform programming to achieve the purpose of safety monitoring and control (supporting equipment).

[0027] like Figure 2 and Figure 6 As shown, the first compressor 16 is provided with a first power interface A1, B1 and a first cooling water inlet CW1, a first cooling water outlet CW2, the first hydrogen cooler 17 is provided with a second cooling water inlet CW3 and a second cooling water outlet CW4, the second compressor 19 is provided with a second power interface A2, B2 and a third cooling water inlet CW5, a third cooling water outlet CW6, the second hydrogen cooler 20 is provided with a fourth cooling water inlet CW7 and a fourth cooling water outlet CW8, the oil cooler 32 is provided with a fifth cooling water inlet CW9 and a fifth cooling water outlet CW10, Cooling water outlet CW10, the first power interface A1, B1 and the second power interface A2, B2 are respectively connected to the hydraulic station power system 2, a cooling water inlet N7 and a cooling water outlet N8 are provided on the external cooler 25, the first, second, third, fourth and fifth cooling water inlets CW1, CW3, CW5, CW7 and CW9 are respectively connected to the cooling water inlet N7, and the first, second, third, fourth and fifth cooling water outlets CW2, CW4, CW6, CW8 and CW10 are respectively connected to the cooling water outlet N8.

[0028] In the preferred embodiment of the utility model, the hydrogen boosting system 1 is connected to the inlet pneumatic valve 13, the first pipeline safety valve 14, the pre-filter 15, the first compressor 16, the first hydrogen cooler 17, the second pipeline safety valve 18, the second compressor 19, the second hydrogen cooler 20, the third pipeline safety valve 21, the post-filter 22, the manual relief valve 23 and the outlet pneumatic valve 24 in sequence from the hydrogen inlet 8. The first pipeline safety valve 14 plays a protective role to prevent damage to subsequent equipment due to accidental excessive pressure. The function of the pre-filter 15 is to pre-clean the hydrogen to remove possible impurities or Particulate matter ensures the cleanliness and stable operation of the system. The first compressor 16 performs the first-stage compression of hydrogen, and the second compressor 19 performs the second-stage supercharging of hydrogen. During the process, it is cooled by the first hydrogen cooler 17 and the second hydrogen cooler 20 to reduce the temperature, in preparation for the next step of secondary supercharging, and enters the subsequent storage unit. The power required for the reciprocating motion of the first compressor 16 and the second compressor 19 is provided by the hydraulic station power system 2. On the one hand, it can ensure the stability and continuity of the power supply; on the other hand, it also enables the power system to be flexibly adjusted according to demand to meet different working pressure requirements. The low-pressure centralized release pipe outlet 11 is connected to the first pipeline safety valve 14, the first compressor 16 and the second compressor 19 through a pipeline, and the high-pressure centralized release pipe outlet 12 is connected to the second pipeline safety valve 18, the third pipeline safety valve 21 and the manual release valve 23 through a pipeline. Hydrogen will pass through the first pipeline safety valve 14, the low-pressure centralized release pipe outlet 11 connected to the second compressor 19, and the high-pressure centralized release pipe outlet 12 connected to the third pipeline safety valve 21 and the manual release valve 23. The design of these two release pipe outlets is to quickly release the pressure in the system in an emergency to ensure the safety of the system.

[0029] In this solution, the cooling system 3 is provided with circulating cooling water by an external cooler 25. The nitrogen system 4 is divided into two parts: replacement gas and drive gas. The replacement gas includes an inlet ball valve 26, a check ball valve 27 and a stop valve 28, which ensure the singleness and safety of the gas flow direction and prevent backflow or gas leakage caused by unexpected situations. The drive gas includes an inlet pressure regulating filter 29 and a drive solenoid valve 30. The inlet pressure regulating filter 29 is used to ensure that the nitrogen sent to the drive device is clean and has a suitable pressure to avoid equipment failure caused by impurities or pressure fluctuations. The drive solenoid valve 30 is responsible for accurately controlling the nitrogen flow direction and flow rate to achieve fine regulation.

[0030] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A combined hydrogen compressor staged compression control system, comprising a hydrogen boosting system (1), a hydraulic station power system (2), a cooling system (3), a nitrogen system (4), a centralized discharge pipeline system (5), a power distribution system (6) and a control system (7), characterized in that: The hydrogen boosting system (1) is provided with a hydrogen inlet (8) at the front end and a hydrogen outlet (9) at the rear end; the nitrogen system (4) is provided with an instrument gas inlet (10) at the front end; and the centralized discharge pipeline system (5) is divided into a low-pressure centralized discharge pipe outlet (11) and a high-pressure centralized discharge pipe outlet (12).

2. The combined hydrogen compressor staged compression control system according to claim 1 is characterized in that: The hydrogen boosting system (1) is connected in sequence from the hydrogen inlet (8) to an inlet pneumatic valve (13), a first pipeline safety valve (14), a pre-filter (15), a first compressor (16), a first hydrogen cooler (17), a second pipeline safety valve (18), a second compressor (19), a second hydrogen cooler (20), a third pipeline safety valve (21), a post-filter (22), a manual relief valve (23) and an outlet pneumatic valve (24).

3. The combined hydrogen compressor staged compression control system according to claim 2 is characterized in that: The first compressor (16) performs a first-stage compression of hydrogen, and the second compressor (19) performs a second-stage pressurization of hydrogen. During the process, the hydrogen is cooled by the first hydrogen cooler (17) and the second hydrogen cooler (20) before entering a subsequent storage unit.

4. The combined hydrogen compressor staged compression control system according to claim 2, characterized in that: The power required for the first compressor (16) and the second compressor (19) to perform reciprocating motion is provided by the hydraulic station power system (2).

5. The combined hydrogen compressor staged compression control system according to claim 2, characterized in that: The low-pressure centralized discharge pipe port (11) is connected to the first pipeline safety valve (14), the first compressor (16) and the second compressor (19) through a pipeline.

6. The combined hydrogen compressor staged compression control system according to claim 2, characterized in that: The high-pressure centralized relief pipe port (12) is connected to the second pipeline safety valve (18), the third pipeline safety valve (21) and the manual relief valve (23) through pipelines.

7. The combined hydrogen compressor staged compression control system according to claim 1, characterized in that: The cooling system (3) is provided with circulating cooling water by an external cooling machine (25).

8. The combined hydrogen compressor staged compression control system according to claim 1, characterized in that: The nitrogen system (4) is divided into two parts: replacement gas and drive gas. The replacement gas includes an inlet ball valve (26), a check ball valve (27) and a stop valve (28), and the drive gas includes an inlet pressure regulating filter (29) and a drive solenoid valve (30).

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