Silicon hydrogen production and loading system with on-demand production capability

Abstract

A silicon-based hydrogen production and loading system with on-demand production capability includes a reaction module, a feeding module, a purification module, a reaction environment control module, an anti-backflow unit, a hydrogen loading device, and a fluid regulation unit. The reaction module defines a reaction space for the alkaline wet reaction of recycled silicon powder to produce a gas mixture containing hydrogen. The purification module defines a purification space for purifying the gas mixture to obtain hydrogen. The reaction environment control module is used to remove gases from the reaction space and purification space before the alkaline wet reaction. The fluid regulation unit is used to regulate the hydrogen gas flow rate and pressure. Through the reaction module, purification module, reaction environment control module, and fluid regulation unit, high-purity hydrogen obtained from recycled silicon powder can be delivered to the hydrogen loading device for on-demand use.

Claims

1. A silicon hydrogen production and loading system with on-demand production capability, suitable for treating recycled silicon powder with an alkaline aqueous solution, the alkaline aqueous solution including one of sodium hydroxide aqueous solution and potassium hydroxide aqueous solution, the silicon hydrogen production and loading system with on-demand production capability comprising: a reaction module defining a reaction space for the recycled silicon powder and the alkaline aqueous solution to undergo an alkaline wet reaction to produce a gas mixture containing hydrogen, the reaction pressure of the alkaline wet reaction being in the range of 0.1 MPa to 2 MPa, and the reaction temperature of the alkaline wet reaction being in the range of 20°C to 150°C; a feeding module disposed upstream of the reaction module for receiving the recycled silicon powder and the alkaline aqueous solution and conveying the recycled silicon powder and the alkaline aqueous solution to the reaction module; and a purification module disposed downstream of the reaction module, defining a purification space for receiving the gas mixture from the reaction module and purifying the gas mixture to obtain hydrogen. A reaction environment control module, connected to the reaction space of the reaction module, is used to remove gases from the reaction space and the purification space before the alkaline wet reaction, and to control the reaction pressure during the alkaline wet reaction; an anti-backflow unit is disposed between the reaction module and the purification module to prevent the gas mixture and hydrogen from flowing back into the reaction space; a hydrogen loading device is disposed downstream of the purification module to receive hydrogen from the purification module; and a fluid regulation unit is disposed between the purification module and the hydrogen loading device to regulate the gas flow rate and gas pressure of the hydrogen from the purification module entering the hydrogen loading device.

2. The silicon hydrogen production and loading system with on-demand production capability as described in claim 1, wherein, The purification module includes two adsorption towers for purifying the gas mixture using a dual-tower alternating purification method.

3. The silicon hydrogen production and loading system with on-demand production capability as described in claim 1, wherein, The purification module includes at least one of a cryogenic purification unit, an adsorption purification unit, and a separation membrane purification unit, and the purity of the hydrogen obtained is 99.999%.

4. The silicon hydrogen production and loading system with on-demand production capability as described in claim 1, wherein, This purification module defines multiple purification spaces.

5. The silicon hydrogen production and loading system with on-demand production function as described in claim 1 further includes a thermal management module connected to the reaction module, the feed module and the purification module, and the thermal management module includes a heat exchange recovery unit and a thermal loop unit. The heat exchange recovery unit is connected to the reaction module, and the thermal loop unit is connected to the heat exchange recovery unit, the feed module and the purification module. The heat exchange recovery unit is used to recover the heat of reaction generated during the alkaline wet reaction and introduce the heat of reaction into the thermal loop unit.

6. The silicon hydrogen production and loading system with on-demand production capability as described in claim 5, wherein, The thermal circuit unit transfers the heat of reaction to the feeding module and uses the heat of reaction to preheat the alkaline aqueous solution.

7. The silicon hydrogen production and loading system with on-demand production capability as described in claim 5, wherein, The purification module includes a cryogenic purification unit, and the thermal circuit unit transfers the heat of reaction to the purification module and drives the cryogenic purification unit to generate a refrigerant fluid with a temperature range of 0°C to 10°C.

8. The silicon hydrogen production and loading system with on-demand production capability as described in claim 1, wherein, The backflow prevention unit includes a valve, a differential pressure sensor, a pressure relief pipe, and an electrically controlled valve connected to the valve, the differential pressure sensor, and the pressure relief pipe. The electrically controlled valve is used to control the valve and the pressure relief pipe according to a sensing signal obtained by the differential pressure sensor.

9. The silicon hydrogen production and loading system with on-demand production capability as described in claim 8, wherein, The backflow prevention unit operates in conjunction with the reaction environment control module or the fluid regulation unit, and initiates an exhaust procedure or a shutdown procedure when the differential pressure sensor detects backflow or overpressure.

10. The silicon hydrogen production and loading system with on-demand production function as described in claim 1 further includes a control module and a monitoring module. The control module is signal-connected to the reaction module, the feed module, the purification module, the anti-backflow unit, and the fluid regulation unit. The monitoring module is signal-connected to the control module and includes a hydrogen detector for monitoring the hydrogen concentration in the reaction module or the purification module and sending a signal to the control module when the hydrogen concentration exceeds a predetermined threshold.

11. The silicon hydrogen production and loading system with on-demand production capability as described in claim 10, wherein, Upon receiving the signal, the control module performs one of the following actions: automatically executes a safety control program, triggers an audible and visual alarm for manual intervention, or uploads abnormal event information to a cloud server for manual intervention.

12. The silicon hydrogen production and loading system with on-demand production capability as described in claim 10, wherein, The monitoring module uploads operational data, including hydrogen concentration, hydrogen pressure, hydrogen flow rate, and reaction temperature, to a cloud server for remote monitoring and anomaly warning.

Images