7results about How to "Improve hydrogen utilization" patented technology

The present invention belongs to the technical field of chemical equipment. The present invention provides a liquid-phase entrainment coupled gas-phase feeding device, a slurry bed reactor and applications thereof. The liquid-phase entrainment coupled gas-phase feeding device is used to realize the coordination of gas feeding and liquid feeding. At the same time, a pulse ejector and a liquid-phase entrainer are used to realize a gas-liquid fully mixed circulation flow in the reactor, thereby increasing the effective coverage area of ​​the gas sweeping, thereby increasing the utilization efficiency of hydrogen and making the reaction conditions milder; at the same time, coking at the bottom of the slurry bed reactor is effectively prevented, thereby extending the continuous operation cycle of hydrogenation.

The invention discloses a multifunctional ejector of a fuel cell, which comprises a valve seat and an ejector body which are connected with each other, and also comprises a heat exchanger for heating hydrogen before entering a fuel cell stack by using waste heat, and the heat exchanger is integrated on the valve seat. The valve seat is provided with a shut-off valve used for controlling the opening and closing states of the hydrogen source opening and a proportional valve used for adjusting fuel supply. The hydrogen supply circulating system comprises a fuel cell stack and the fuel cell multifunctional ejector, the multifunctional ejector is arranged on the fuel cell stack, a gas-water separator is arranged on the fuel cell stack corresponding to a stack hydrogen outlet, a stack hydrogen backflow port connected with the ejector is formed in the top of the gas-water separator, and the fuel cell hydrogen backflow port is connected with the ejector. The bottom of the gas-water separator is connected with a drain pipe. The monomer performance at the anode inlet of the fuel cell stack is improved, and the working efficiency of the fuel cell stack and the monomer consistency of the stack are improved.

This utility model relates to a hydrogen peroxide quartz lamp burner, belonging to the field of quartz product manufacturing equipment. The burner consists of five parts: a lamp cover, a lamp holder, an oxygen pipe, a hydrogen pipe, and a feeding pipe. The main feeding pipe is divided into four branch feeding pipes, which are evenly distributed circumferentially through the lamp cover and extend into the central interlayer formed by the fusion of the lamp cover and the lamp holder, forming a feeding channel. Quartz powder can slide along the surface of the interlayer to the molten pool for easy melting. Three oxygen pipes and two hydrogen pipes are connected to the outside of the lamp cover, and the hydrogen and oxygen are separated by the lamp holder to prevent them from mixing and exploding inside the quartz lamp. The two hydrogen pipes are fused to the lamp cover and connect to the central interlayer; the three oxygen pipes penetrate the lamp cover and are fused to the lamp holder. A sieve plate is placed inside the lamp holder, and at its lower part, wick tubes of different levels, each with the same focal point, are obliquely welded in a ring array, guiding the flow of the mixed gas to ensure complete combustion, increasing the burner's operating temperature, and thus improving the quality of silicon dioxide melting.

This invention relates to a hydrogen circuit pressure stabilization and nitrogen removal device for a fuel cell system, comprising a gas-liquid separator, an inlet three-way valve, an outlet three-way valve, a nitrogen condenser, and a hydrogen circulation component. The mixed gas from the fuel cell stack's hydrogen outlet enters the gas-liquid separator to separate liquid water. The outlet of the gas-liquid separator is connected to the inlet of the inlet three-way valve; the first outlet of the inlet three-way valve is connected to the first inlet of the outlet three-way valve; the second outlet of the inlet three-way valve is connected to the inlet of the nitrogen condenser; the outlet of the nitrogen condenser is connected to the second inlet of the outlet three-way valve; the nitrogen condenser liquefies the nitrogen in the mixed gas entering it into liquid nitrogen; the outlet of the outlet three-way valve is connected to the hydrogen circulation component. This invention solves the problems of large fluctuations in hydrogen circuit pressure and low hydrogen utilization rate that are common in conventional hydrogen removal valve nitrogen removal methods, effectively extending fuel cell life and improving system hydrogen utilization rate.

The invention discloses a fuel cell system and a vehicle, and relates to the technical field of fuel cells, the fuel cell system comprises a fuel cell, a hydrogen supply flow path and a gas-liquid separation device, the hydrogen supply flow path is communicated with a hydrogen inlet, the gas-liquid separation device comprises a box body, a separation blade and an adsorption structure, the box body is provided with a box body side wall and a box body top wall, a gas inlet and a liquid outlet are formed in the side wall of the box body, an exhaust port is formed in the top wall of the box body, the gas inlet is communicated with the hydrogen outlet, the exhaust port is communicated with the hydrogen supply flow path, the adsorption structure is arranged in the box body and used for adsorbing nitrogen, the adsorption structure covers the exhaust port, and the blocking piece is arranged in the box body and located between the adsorption structure side wall of the adsorption structure and the box body side wall. And the separation blade is used for separating liquid in the gas. According to the fuel cell system provided by the embodiment of the invention, the hydrogen utilization rate is improved, the resource waste is reduced, the components of the fuel cell system are reduced, the cost is reduced, and the whole machine integration level of the fuel cell system is improved.

The application discloses a hydrogen fuel control system for unmanned aerial vehicles, which comprises a hydrogen bottle, a pressure reducing valve, a hydrogen inlet valve, a first pressure sensor, a fuel cell stack, a steam-water separator, a double-variable peristaltic pump, a second pressure sensor, a controller, a drain valve, a temperature sensor and a current sensor. The system constitutes a closed hydrogen circulation loop to recover unreacted hydrogen. The controller monitors the hydrogen circulation pressure, the stack temperature and the load current in real time through a sensing network composed of double pressure sensors, a temperature sensor and a current sensor, analyzes the load change and the water-heat state based on the built-in program, and cooperatively regulates the rotating speed and the extrusion degree of the double-variable peristaltic pump, dynamically optimizes the flow and the flushing intensity of the hydrogen circulation. The system solves the water-heat management problem of the fuel cell of the unmanned aerial vehicle under dynamic working conditions, improves the hydrogen utilization rate, effectively prevents water flooding and membrane dryness, and guarantees the efficient, stable and long-life operation of the system.

The present invention belongs to the technical field of fuel cells, and discloses a hydrogen-air fuel cell system with high hydrogen utilization rate and a purging method thereof, comprising an air supply device, a fuel cell stack and a hydrogen supply system, wherein: the fuel cell stack is a place where hydrogen and oxygen fuel undergo chemical reactions to generate electrical energy, and the air supply device is used to provide the fuel cell stack with air required for the chemical reaction; the hydrogen supply system comprises a hydrogen supply device and a hydrogen buffer device, the hydrogen supply device comprises a hydrogen storage unit, the hydrogen storage unit is connected to the anode gas inlet of the fuel cell stack, a hydrogen pressure reducing valve is further arranged between the two, and a hydrogen intake solenoid valve is further arranged between the hydrogen pressure reducing valve and the hydrogen-air fuel cell stack; the hydrogen buffer device comprises a buffer unit connected to the cathode of the fuel cell stack, a first pulse valve is arranged between the buffer unit and the fuel cell stack, and a second pulse valve is arranged at the exhaust end of the buffer unit.