96 results about "Hydrogen compression" patented technology

The invention discloses a standby power supply system, and relates to the technical field of transformer substation power supply, a hydrogen production module is used for producing hydrogen by using commercial power or renewable power and then storing the hydrogen in a high-pressure gas storage tank of a hydrogen storage module, and the hydrogen storage module is provided with a one-way valve for the hydrogen to pass through in one way and a gas compressor for compressing the hydrogen to realize hydrogen conveying; after hydrogen stored in the hydrogen storage module is subjected to power generation through a fuel cell through the power generation module, the hydrogen is input into a storage battery pack of an uninterruptible power supply system of the transformer substation, and in the whole process, the control module detects the state of a main power supply and controls starting and stopping of the power generation module. The hydrogen production rate of the hydrogen production module and the hydrogen storage pressure of the hydrogen storage module are controlled, only water is generated in the power generation process, harmful emission is avoided, direct current generated by the fuel cell is directly matched with a UPS storage battery direct current bus, the response speed is high, conversion loss is reduced, the energy utilization efficiency is improved, the system automation degree is high, and the operation and maintenance cost is low.

According to the gas-liquid mixing hydrogen refueling station system with the cooling capacity recovery and gradient utilization functions, flash steam of the low-temperature liquid hydrogen storage tank is collected and stored in the low-temperature hydrogen storage tank, the cooling capacity of the flash steam is fully utilized, cooling capacity is provided for the heat exchanger, high-pressure hydrogen is cooled, the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized, and the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized. Energy gradient utilization of cooling capacity is achieved, and loss of extra energy in the hydrogen refueling station is reduced; the flash steam obtained after heat exchange is further used for hydrogen compression, and reutilization of the low-temperature liquid hydrogen flash steam is achieved; the flash steam after heat exchange is pressurized and then cooled by using the cooling capacity of the high-pressure liquid hydrogen, and meanwhile, the heating gasification of the high-pressure liquid hydrogen is realized, namely the gasification of the pressurized liquid hydrogen in the liquid hydrogen refueling station and the cooling of a gas hydrogen pressurization process in the liquid hydrogen refueling station are coupled for heat exchange, so that the utilization efficiency of the heat and the cooling capacity is greatly improved; an external vaporizer is not needed for high-pressure liquid hydrogen gasification, an external cooler is not needed in the gas-hydrogen pressurization process, and energy consumption is greatly reduced.

The invention relates to the technical field of hydrogen storage alloys, in particular to a Ti-based hydrogen storage alloy and a preparation method and application thereof. The chemical formula of the Ti-based hydrogen storage alloy is TibZr (1.02b) CrcMn (1.6 c) Fe 0.4, b is larger than or equal to 0.92 and smaller than or equal to 0.95, and c is larger than or equal to 1.0 and smaller than or equal to 1.2. According to the invention, Ti or Cr is doped into a Ti0. 92Zr0. 1Cr1. 0Mn0. 6Fe0. 4 alloy matrix, and regulation and control of unit cell parameters and electronegativity are realized by means of alloying, so that the hydrogen compression material has a higher compression ratio, and the alloy crystal structure is stable, and has more excellent activation performance, longer cycle life and higher cycle stability.

An electrochemical hydrogen compression system comprises a hydrogen compression stack having a unit cell including an electrolyte membrane, an anode disposed on one surface of the electrolyte membrane, and a cathode disposed on another surface of the electrolyte membrane, and that supplies a hydrogen gas to the anode, and delivers from the cathode the hydrogen gas which has been compressed, an electrical power source device that applies a voltage to the hydrogen compression stack, a hydrogen supply device that supplies the hydrogen gas to the hydrogen compression stack, a storage device that stores the hydrogen gas output from the hydrogen compression stack, and a return flow path that returns the hydrogen gas output from the hydrogen compression stack to the hydrogen supply device, wherein a hydrogen storage tank that stores the hydrogen gas is provided in the return flow path.

The utility model belongs to the technical field of coal tar hydrogenation process, and relates to a sealing gas conveying system for sealing a circulating hydrogen compressor, which comprises a conveying pipeline and heating equipment, the conveying pipeline is connected with the outlet end of the compressor and used for conveying sealing gas. The heating device is arranged on the conveying pipeline and used for heating the sealing gas. According to the utility model, the process gas at the outlet end of the compressor is heated through the additionally arranged heating equipment, so that the process gas can be conveniently heated to the required temperature to serve as sealing gas, the load of the compressor does not need to be increased, unnecessary energy consumption of the compressor is avoided, and in addition, in the actual operation process, the energy consumption is reduced. The load of the compressor can be reduced according to actual process requirements, so that the process gas temperature at the outlet end of the compressor is reduced, and energy conservation and consumption reduction of the compressor are realized.

The application relates to the field of hydrogen production, in particular to a hydrogen compression device which comprises a shell, the shell is provided with an air outlet pipe for air outlet and an air inlet pipe for air inlet, a sealing nut is sleeved on the air outlet pipe and the air inlet pipe in a threaded mode, a flexible sealing ring is also sleeved on the air outlet pipe and the air inlet pipe, the flexible sealing ring is pressed on the shell by the sealing nut, an air-tight cover is further arranged on the shell, the air-tight cover wraps the connecting positions of the air outlet pipe and the shell and the air inlet pipe and the shell, a compensation runner is rotationally arranged in the air-tight cover, an air guide pipe is further arranged in the air-tight cover, the air guide pipe is used for guiding the hydrogen leaked from the air outlet pipe and the air inlet pipe to the compensation runner, a plurality of rotating blocks are arranged on the sealing nut, the compensation runner drives the sealing nut to rotate and press the flexible sealing ring. The application has the effect of improving the air tightness of the air-tight device.

The utility model provides an exhaust oil removal device of a mechanical piston type compressor, and belongs to the field of high-pressure hydrogen oil removal. The problem that the filter is broken and cannot be used due to large pressure difference inside and outside the filter when the hydrogen compression system is started is solved. A separation cavity and an oil collection cavity are formed in the separation cylinder; the main filter is arranged in the separation cavity; the air distribution valve is provided with a normally open outlet and a partial pressure outlet, the normally open outlet is connected with the interior of the main filter, and the partial pressure outlet is connected with the auxiliary filter; and after the gas distribution valve is subjected to the acting force of compressed gas, the pressure distribution outlet is gradually closed. The device is mainly used for high-pressure hydrogen oil removal.

Described herein are interpenetrating crosslinked ionomeric polymer network membranes comprising bis-arylimidazolium ionomeric polymers, a second polymer, and a cross-linking moiety, and methods of making the interpenetrating crosslinked ionomeric polymer network membranes. Such interpenetrating crosslinked ionomeric polymer network membranes are used in electrochemical devices such as fuel cells, electrolyzers, hydrogen pumps, thermoelectrochemical hydrogen pumps, electrochemical hydrogen compressors, redox flow batteries, and other electrochemical devices, and have application in fuel cells, water electrolyzers, hydrogen compression, hydrogen decompression, water purification, and battery products.

The utility model relates to a compressor technical field, concretely is a kind of air quantity stepless regulator applied to new hydrogen compressor.The utility model provides a kind of improved air quantity stepless regulator applied to new hydrogen compressor.It include compressor body, inlet valve, exhaust valve and stepless regulation control mechanism etc., the stepless regulation control mechanism is arranged at the top of compressor body, the adjustable outlet valve is also arranged at the top of compressor body.The moving rate of adjusting block is controlled by hydraulic cylinder, the opening and closing time of inlet valve and delay closing function can be realized accurately, make the excess gas before compression backflow to backflow cavity through exhaust valve, ensure that only the required gas volume is compressed, and then the indicated work consumption can be effectively reduced, and energy efficiency is improved;And when the pressure in compression cavity exceeds the set value, gas can be discharged through the exhaust valve of shaft side and the adjustable outlet valve of cover side double channel respectively, avoid that piston and connecting rod bear excessive one-way force, and then it is favorable to prolong the service life of key components.

The utility model relates to the field of petroleum chemical industry, concretely relates to a kind of aromatic oil hydrogenation device.The aromatic oil hydrogenation device includes: new hydrogen compressor, with opposite new hydrogen import and new hydrogen export;Import pipeline, one end is connected with new hydrogen import, the other end is suitable for being connected with pipe network;Outlet pipeline, one end is connected with new hydrogen export;Check valve is arranged on outlet pipeline, and flow orifice is arranged at check valve;Flow transmitter is also arranged on outlet pipeline, and flow transmitter is arranged behind check valve along the flow direction of hydrogen.The utility model relates to a kind of aromatic oil hydrogenation device, and the pressure and flow of hydrogen can be adjusted by new hydrogen compressor and flow orifice, to adapt to the use requirement of aromatic oil hydrogenation device.

The utility model discloses a multi-gas-valve cylinder cover structure of an ionic liquid hydrogen compressor, and belongs to the technical field of hydrogen compression equipment. Comprising an air valve assembly, an exhaust valve support, an air inlet valve support, a four-air-valve cylinder cover, a three-air-valve cylinder cover, a cylinder cover plate, a cylinder cover plate bolt, an air inlet connector and an exhaust connector. The four-air-valve cylinder cover can be provided with four air valve assemblies, and the three-air-valve cylinder cover can be provided with three air valve assemblies. By means of the structure, the intake and exhaust response speed of the ionic liquid hydrogen compressor is effectively increased, system power consumption is reduced, and effective control and rapid conversion of gas are achieved. Meanwhile, the space utilization rate is high, the maintenance cost is low, and wide application of the ionic liquid hydrogen compressor is facilitated.

The utility model relates to the technical field of chemical engineering, in particular to a waste water recovery system for a steam seal cooler of a back pressure type steam turbine, which is characterized in that the back pressure type steam turbine is connected with a disproportionation circulating hydrogen compressor; the steam seal cooler is connected with the back pressure type steam turbine; the condensing steam turbine is connected with the isomerization circulating hydrogen compressor; the liquid collecting box is arranged at the bottom of the condensing steam turbine; the bottom of the drainage expansion box is communicated with the bottom of the liquid collection box; a condensate outlet of the steam seal cooler is connected to the drainage expansion box through a crossover line, and the crossover line is provided with a first gate valve. According to the utility model, the part of water is recycled to a condensed water pipe network through pipeline transformation, so that the waste of water resources is reduced, the consumption cost of public engineering sewage reagents is also reduced, and the effective combination of energy conservation and environmental protection is realized.

A hydrogen energy storage device and a hydrogen energy storage method therefor, comprising a compression housing (1) and a hydrogen compression system, wherein a compression chamber (24) is provided inside the compression housing (1), an intake hood (2) is mounted on the top surface of the compression housing (1), an extension pipe (3) is mounted on the bottom surface of the intake hood (2), an intake valve (4) is mounted on the bottom surface of the extension pipe (3), and an upper storage tank (5) is mounted on the top surface of the intake hood (2); a pressure sensor monitors the real-time pressure value inside the upper storage tank (5) to determine the hydrogen capacity therein, and then obtains a fluctuation difference value which is analyzed and processed to generate a pressure-increasing signal or a pressure-reducing signal; a liquid level sensor analyzes the remaining space inside a lower storage tank, and processes pressure abnormality signals to obtain a liquid level discharge signal, a hydrogen discharge signal or a pressure-increasing signal; and different received signals respectively control activation of a condensation component or a conversion component to realize allocation of hydrogen storage space.

The invention relates to the technical field of new energy development and energy storage, and discloses a coupling system based on deep ground dry hot rock stratum hydrogen storage and geothermal energy development and a working method thereof.The coupling system comprises a ground surface subsystem, a shaft subsystem and a dry hot rock reservoir; the earth surface subsystem comprises a hydrogen production unit, a hydrogen compression and injection module, a power generation combined heat and power supply unit, a gas separation and purification module and a central control system; the gas separation and purification module is connected with a power grid; the shaft subsystem comprises underground extraction equipment, a shaft conveying system and a ground wellhead device; the shaft conveying system comprises an injection well and a production well, the hot dry rock reservoir comprises a plurality of artificial fracture networks which are communicated with one another, and monitoring modules are installed in the artificial fracture networks. Large-scale hydrogen storage and hot dry rock development are combined, hydrogen storage and efficient geothermal extraction and conversion are synchronously achieved by means of the space, the high-temperature environment and the sealing performance of a hot dry rock reservoir, and the development problem of a hydrogen storage and enhanced geothermal system is solved.

The ammonia production system comprises a hydrogen source and a hydrogen compression unit, configured to compress hydrogen from the hydrogen source. The system further comprises a nitrogen source and a syngas compressor, configured to receive nitrogen from the nitrogen source and hydrogen from the hydrogen compression unit, and further configured to compress a syngas including a mixture of hydrogen and nitrogen and deliver the compressed gas mixture to an ammonia synthesis module. The hydrogen source and the nitrogen source are fluidly coupled to the syngas compressor. The hydrogen compression unit is configured to deliver hydrogen at pressures of 8 to 17 bar.

The application relates to an ionic liquid hydrogen gas compressor ionic liquid circulation and power-free injection liquid supplementing device, which comprises a hydrogen gas pressurizing cylinder, a gas-liquid separator and an ionic liquid circulation system; the hydrogen gas pressurizing cylinder comprises a nozzle and a gas compression cavity; the ionic liquid circulation system comprises a pressure reducing valve, an ionic liquid tank and a proportional valve; high-pressure gas-liquid mixed fluid discharged from the compression outlet of the hydrogen gas pressurizing cylinder enters the gas-liquid separator, pure hydrogen gas separated out is stored into a hydrogen storage bottle, and the separated pure ionic liquid is reduced to a safe pressure through the pressure reducing valve and then enters the nozzle through the proportional valve, is atomized by the nozzle and is sprayed back into the gas compression cavity of the hydrogen gas pressurizing cylinder, and the leaked ionic liquid in the pressure reducing valve is poured back into the ionic liquid tank. The application utilizes the high pressure existing in the gas-liquid separator, directly sprays into the gas cavity of the hydrogen compressor in the form of atomization through the nozzle after a certain degree of pressure reduction, and plays the roles of cooling, heat dissipation and energy efficiency improvement.

The application provides a low-temperature supercritical hydrogen storage system using two-stage series mixed refrigerant refrigeration, comprising a hydrogen compression cooling system, a pre-cooling mixed refrigerant compression cooling system, a deep cooling mixed refrigerant compression cooling system, a first heat exchange system, a second heat exchange system, a third heat exchange system, a fourth heat exchange system, a fifth heat exchange system, a sixth heat exchange system, a seventh heat exchange system and a hydrogen storage tank. The hydrogen passes through the hydrogen compression cooling system, the first heat exchange system, the second heat exchange system, the third heat exchange system, the fourth heat exchange system, the fifth heat exchange system, the sixth heat exchange system and the seventh heat exchange system in sequence and is converted into low-temperature supercritical hydrogen and stored in the hydrogen storage tank. The pre-cooling mixed refrigerant is used for pre-cooling the hydrogen and the deep cooling mixed refrigerant, the cooling of the hydrogen by the mixed refrigerant can be fully utilized, the production cost is reduced, the cooling effect is improved, and the circulation performance of the mixed refrigerant in the system is good.

The invention discloses an energy storage and energy supply control method of a hydrogen production and energy supply system and a related device, and the method comprises the steps: continuously generating hydrogen through a hydrogen production reaction device, carrying out the pretreatment, and conveying the hydrogen into a conveying shunting pipeline; the real-time filling requirement is obtained, the real-time filling amount of hydrogen needing to be filled currently is calculated, a pipeline valve is controlled to open a filling channel, and the hydrogen is conveyed to hydrogen using equipment to complete real-time filling; the difference value between the total hydrogen production amount and the real-time filling amount is calculated, the amount of residual hydrogen in the conveying flow dividing pipeline is determined, a pipeline valve is controlled to be switched to a storage channel, and hydrogen with the residual hydrogen amount is conveyed into a hydrogen compression device; and compressing the residual amount of hydrogen to a preset high-pressure state, and conveying the hydrogen to a high-pressure hydrogen storage tank for sealed storage. According to the hydrogen production and energy supply system, the filling passage and the storage passage are arranged, switching of the pipeline valves is triggered by calculating the hydrogen flow value, and the safety and efficiency of the energy storage function of the hydrogen production and energy supply system are effectively improved.

A control device, when a water electrolysis system is initiated, controls electrical power source devices in a manner so that a water electrolysis electrical current and a hydrogen compression electrical current increase gradually in coordination. During such gradual increasing, it is detected whether or not flooding has occurred in a hydrogen compression stack, and at a time when it is detected that flooding is occurring, until the flooding is eliminated, a flooding elimination control is carried out in which an increase in the water electrolysis electrical current and the hydrogen compression electrical current is temporarily suspended and the water electrolysis electrical current and the hydrogen compression current are maintained at a constant current value in coordination.

The invention relates to the technical field of coal tar, in particular to a multi-stage reactor for full-fraction hydrogenation of medium and low temperature coal tar. The new hydrogen treatment mechanism comprises a first outer box fixedly connected to the upper end face of the base, a deoxidation assembly, a convergence funnel, a desulfurization assembly and a drying assembly are sequentially arranged in the first outer box from top to bottom, and a new hydrogen compressor and an output assembly are arranged on the two sides of the first outer box correspondingly; the new hydrogen compressor and the output assembly communicate with the interior of the first outer box. According to the circulating hydrogen treatment mechanism, through a deoxidation assembly, a desulfurization assembly, a drying assembly and an output assembly in the new hydrogen treatment mechanism, pretreatment of deoxidation, desulfurization and drying is sequentially conducted on new hydrogen before the new hydrogen is input into the reactor, and harmful impurities in the hydrogen can be effectively removed; poisoning and inactivation of the catalyst are avoided, side reaction is inhibited, and the reactor and subsequent equipment are protected from corrosion.

Present disclosure relates to process for increasing the purity and recovery of hydrogen product stream obtained from a dehydrogenation process. The dehydrogenated effluent stream is separated to obtain the net gas stream. The net gas stream is compressed in a hydrogen compressor section. Even after compressing the net gas, traces of toluene are still present in the gas phase. Applicants have found to recover these toluene traces, the compressed gas from the hydrogen compressor section is chilled in a vapor economizer followed by a chiller to produce a chilled stream at a temperature of from about -27°C to about 17°C. This process also helps maintain the Wobbe Index of the hydrogen product stream in the range of about 44 to about 49 MJ / m3. In another embodiment, the compressed net gas stream from the hydrogen compressor section is adsorbed in an adsorption unit to separate hydrogen product stream from the recycle gas stream, wherein the recycle gas stream is completely recycled to the hydrogen compressor.

The invention relates to a method for preparing a high-value oil product through synergistic co-hydrogenation of waste plastics and waste lubricating oil. The method comprises the following steps: a) preparing waste plastics, waste lubricating oil and a catalyst in a raw material tank to form uniform mixed slurry; b) conveying the mixed slurry through a high-pressure feed pump, mixing the mixed slurry with hydrogen in a pipeline, preheating the mixed slurry to a certain temperature in a preheater, and carrying out a co-hydrogenation reaction in a multiphase flow reactor; c) a reaction product output by the multiphase flow reactor passes through a first-stage separator and a second-stage separator, a gas-phase product and a heavy liquid-phase product are obtained, part of the heavy liquid-phase product returns to the raw material tank for continuous reaction, and the rest part of the heavy liquid-phase product serves as fuel oil to be output from a device; and d) separating the gas-phase product by a three-stage separator, feeding the top gas into a recycle hydrogen compressor, feeding the bottom liquid into a fixed bed reactor for hydrofining, and separating the reaction product by a fractionating tower to obtain the light white oil and the lubricant base oil.

The utility model provides a hydrogen filtering device and hydrogen compression equipment, and the hydrogen filtering device comprises a mounting bracket, and a first filtering part, a second filtering part and a switch valve part which are arranged on the mounting bracket, the first filtering part is used for primary filtering, and the second filtering part is used for secondary filtering; the first filtering part comprises a double-layer filtering cylinder, the double-layer filtering cylinder comprises an outer cylinder body and an inner cylinder body arranged in the outer cylinder body, a first air inlet is formed in the top of the outer cylinder body, and a first air outlet is formed in the bottom of the outer cylinder body. Hydrogen is introduced into the first gas inlet in the top of the outer cylinder body, enters the inner cylinder body and then enters the outer cylinder body from the bottom of the inner cylinder body, primary filtering treatment is carried out through the filtering units in the inner cylinder body and the outer cylinder body, secondary filtering is carried out through the second filtering component, the filtering effect is good, and the filtering effect is good. Therefore, the hydrogen can meet the required purity when being compressed.

The invention discloses a shut-down method of a diesel oil liquid phase hydrogenation device, which comprises the following steps: (1) firstly reducing the feeding temperature of a diesel oil raw material, introducing supplementary hydrogen into the diesel oil liquid phase hydrogenation device by a new hydrogen compressor at the same time, stopping feeding the diesel oil raw material after the reaction temperature is reduced, introducing light distillate oil to wash each catalyst bed layer in a reactor, and stopping feeding the light distillate oil after the reaction temperature is reduced; after the washing is finished, stopping injecting the light distillate oil; (2) closing a supplemental hydrogen valve, enabling supplemental hydrogen to pass through the heating furnace and the gas-liquid mixer, enabling the heated supplemental hydrogen to enter from the top of the reactor to perform first purging, then introducing part of fuel gas of the heating furnace into a catalyst bed layer at the lower part of the reactor to perform second purging, stored oil of the lower bed flows out from the bottom of the reactor under the combined action of supplementary hydrogen and fuel gas. According to the method, the oil carrying effect of the catalyst during shutdown is effectively improved, the purging time is shortened, and the shutdown process of the liquid-phase hydrogenation device can be rapidly completed.

An electrochemical hydrogen compression system is equipped with a supply pathway communicating with an anode side of a unit cell, a discharge pathway communicating with a cathode side of the unit cell, a hydrogen return pathway guiding hydrogen to the supply pathway from a downstream side of a gas-liquid separator in the discharge pathway, and a control device. In the case that the electrical value indicative of a voltage or a resistance exceeds a predetermined threshold value when electrical current of the hydrogen compression stack is of a predetermined value, the control device opens a hydrogen return valve disposed in the hydrogen return pathway.

The application provides a hydrogen supply system and a hydrogen charging and discharging control method. The hydrogen supply system comprises an electrolytic water hydrogen production unit, a hydrogen storage unit and a hydrogen compression unit which are sequentially connected. The hydrogen storage unit comprises a first inlet manifold, a second inlet manifold, a first group of hydrogen storage tanks, a second group of hydrogen storage tanks, an outlet hydrogen manifold, a hydrogen storage controller, a first tank inlet valve, a second tank inlet valve, a first tank outlet valve, a second tank outlet valve, a first pressure regulating valve, a first manifold pressure controller, a pressure sensor and the hydrogen storage controller. In the hydrogen charging and discharging control method, the pressure energy of hydrogen produced by the electrolytic tank is fully utilized in the process of pure charging, the hydrogen storage volume is reduced, and the current hydrogen storage pressure is increased. In the process of pure discharging, the pressure energy of high-pressure hydrogen in the spherical tank is preferentially utilized, the hydrogen discharge volume is increased, and the hydrogen pressure drop speed is slowed down, so that the subsequent hydrogen compression energy consumption is reduced.

The utility model discloses a gas valve structure of an ionic liquid hydrogen compressor, and belongs to the technical field of hydrogen compression equipment. Comprising a straight valve bolt, a valve seat, a spring, a valve core, a valve shell and a valve sealing ring, in the invention, the total area of the air channel is increased by 57%, and the area of the air inlet channel is increased by 12%; each exhaust passage hole is communicated with the guide hole, pressure in each exhaust passage hole is balanced, disturbance of airflow in the air valve is reduced, airflow instability or air resistance can be effectively prevented, and equipment performance is improved. The design of the air valve with a compact structure is beneficial to being embedded into a modularized cylinder cover, so that the disassembly time is shortened; the frictional contact area is reduced through the design of the valve element, meanwhile, a cooling channel is additionally arranged, the hidden danger of abnormal abrasion caused by heating is reduced, and therefore the service life is prolonged.

The utility model discloses a modular structure of an ionic liquid hydrogen compressor, and belongs to the technical field of hydrogen compression equipment. Comprising an in-line compressor, an annular compressor, a compressor module, a cylinder body module assembly, a cylinder cover module assembly, a piston assembly, a hydraulic cylinder, a position sensor and ionic liquid. The modular design structure is adopted, the expansibility is high, the compressor module can serve as an independent unit to work and can also be flexibly combined according to the requirements of customers for the outlet displacement and the outlet pressure of the compressor, and the expansibility requirement is met; the space utilization rate is low and high, and the in-line compressor and the annular compressor are formed by combining and arranging a plurality of compression modules according to the space form of a customer; the manufacturing cost and the maintenance cost are low, and wide application of the ionic liquid hydrogen compressor is facilitated.

The application provides a lubricating oil composition for a gas engine, an additive mother liquor, an oil change cycle determination method and a gas engine system comprising the same, and relates to the technical field of lubricating oil.The additive mother liquor takes a III type base oil or a poly-alpha-olefin base oil as a carrier, and comprises a detergent, a dispersant, an anti-wear and extreme pressure agent, an antioxidant, a rust-preventing and corrosion-inhibiting agent, an ash-free friction modifier, a defoaming agent and an auxiliary additive.The additive mother liquor of the application can significantly improve the oxidation resistance and nitration resistance of the lubricating oil, effectively control high-temperature deposition, wear and corrosion when being applied to the lubricating oil for the gas engine through the synergistic compounding of the above-mentioned raw materials.Meanwhile, the lubricating oil composition for the gas engine of the application is suitable for compressed natural gas, liquefied natural gas, biogas, landfill gas or hydrogen-doped compressed natural gas engines and fixed gas power generating sets.

A compression device includes a hydrogen compressor and a return circuit having an inlet fluidly coupled with a discharge side of a centrifugal compressor and an outlet fluidly coupled with a suction side of the centrifugal compressor. A head loss control valve is positioned in the return circuit. The head loss control valve is adapted to generate a controlled head loss in the return circuit when the compressor operates at a lower flow rate than the surge control line.