Abstract: Disclosed herein is an integrated small and medium-sized natural gas steam reforming reactor comprising a furnace body, a combustion module located outside the furnace body, and a conversion reaction module, a steam generation and superheating module, a medium temperature shift module and a desulfurization module arranged inside the furnace body, wherein the combustion module supplies combustion flue gas into an interior of the furnace body, the interior of the furnace body is partitioned into a plurality of flue cavities by a plurality of high-temperature partition plates, and adjacent flue cavities are communicated via gaps between the high-temperature partition plates and an inner wall of the furnace body, thus forming a flue gas channel that zigzags several times; and the flue cavities and the modules arranged therein sequentially form a conversion unit, a steam generation unit, a medium temperature shift unit and a desulfurization unit.

Abstract: A unified control scheme to achieve seamless mode change between grid-connected mode and islanded mode for photovoltaic (PV) systems includes two decoupled control units: a DC-DC converter control unit and a DC-AC converter control unit. The DC-bus voltage is controlled through the DC-DC converter control unit, which supplies a “stiff DC source” to the DC-AC converter. The seamless mode change is implemented in the DC-AC converter control module via three digital switches between power flow control for grid-connected mode (or MPPT mode), and droop control for islanded mode (or droop mode), while preserving the continuity of control signals in all control units with the configurations of digital switches.

Abstract: Disclosed herein is an integrated small and medium-sized natural gas steam reforming reactor comprising a furnace body, a combustion module located outside the furnace body, and a conversion reaction module, a steam generation and superheating module, a medium temperature shift module and a desulfurization module arranged inside the furnace body, wherein the combustion module supplies combustion flue gas into an interior of the furnace body, the interior of the furnace body is partitioned into a plurality of flue cavities by a plurality of high-temperature partition plates, and adjacent flue cavities are communicated via gaps between the high-temperature partition plates and an inner wall of the furnace body, thus forming a flue gas channel that zigzags several times; and the flue cavities and the modules arranged therein sequentially form a conversion unit, a steam generation unit, a medium temperature shift unit and a desulfurization unit.

Abstract: A control system and method include a control strategy and a UDE (Uncertainty and Disturbance Estimator)-based controller incorporated into the control strategy to achieve proportional load sharing for parallel-operated inverters. The UDE-based controller regulates the reactive power against the output generated by a reactive power reference unit according to the load voltage to generate the amplitude of the control voltage. The conventional droop method regulates real power to generate the phase of the control voltage. As a result, the model uncertainties (e.g., parameter drifts and uncertain output impedance), and system disturbances (e.g., fluctuating DC-link voltage and load change) can be estimated and compensated for accurate load sharing.

Abstract: A control system and method include a control strategy and a UDE (Uncertainty and Disturbance Estimator)-based controller incorporated into the control strategy to achieve proportional load sharing for parallel-operated inverters. The UDE-based controller regulates the reactive power against the output generated by a reactive power reference unit according to the load voltage to generate the amplitude of the control voltage. The conventional droop method regulates real power to generate the phase of the control voltage. As a result, the model uncertainties (e.g., parameter drifts and uncertain output impedance), and system disturbances (e.g., fluctuating DC-link voltage and load change) can be estimated and compensated for accurate load sharing.

Abstract: The present invention relates to a steam to carbon ratio control device including: a heat source, and an evaporation mixer and a steam separator interconnected by pipelines, said connecting pipelines of the evaporation mixer and the steam separator are provided with a temperature control device and a pressure control device, said evaporation mixer is provided with a natural gas inlet, a desalinated water inlet and a mixed gas outlet, the inlet of said heat source is connected with a end closer to the natural gas inlet of the evaporation mixer, the outlet of said heat source is connected to a end closer to the mixed gas outlet. Comparing with the prior art, the beneficial effect of the present invention is that it can accurately control the proportion of natural gas to steam and stably control the flow rates of natural gas and steam.

Abstract: The present invention relates to a steam to carbon ratio control device including: a heat source, and an evaporation mixer and a steam separator interconnected by pipelines, said connecting pipelines of the evaporation mixer and the steam separator are provided with a temperature control device and a pressure control device, said evaporation mixer is provided with a natural gas inlet, a desalinated water inlet and a mixed gas outlet, the inlet of said heat source is connected with a end closer to the natural gas inlet of the evaporation mixer, the outlet of said heat source is connected to a end closer to the mixed gas outlet. Comparing with the prior art, the beneficial effect of the present invention is that it can accurately control the proportion of natural gas to steam and stably control the flow rates of natural gas and steam.

Abstract: An artificial biomembrane and a method for manufacturing the same. Raw film-forming materials, such as polyvinyl alcohol, sodium alginate and sodium carboxymethyl cellulose, are dissolved in water to form a glue liquid, into which a mixture of coal-based activated carbon powder, diatomaceous earth powder sodium acetate and single strain or multiple strains of microbial cells are added. The resultant glue liquid is immobilized using powder beds or fluidized beds to form artificial biomembranes. The artificial biomembranes can be manufactured in a large-scale, with simple process of immobilization, high efficiency and low cost. The artificial biomembranes can be applied to ecological restorations and different polluted water environments, such as industrial wastewater, sewage, fishing water, landscape water, flowing water and the like.

Abstract: The present invention relates to an artificial biomembrane and a method for manufacturing such an artificial biomembrane. The beneficial microbial strains, authorized for use in the nation, are concentrated after fermentation. Film-forming raw materials in the water, such as polyvinyl alcohol, sodium alginate and sodium carboxymethyl cellulose, are dissolved into glue liquid, into which the mixture of coal-based activated carbon powder, diatomaceous earth powder sodium acetate and single strain or multiple strains of microbial cells are added. The glue liquid are set into the spray device that is pressed to spray, such that fogdrops are landed on powder beds or fluidized beds for immobilization to form artificial biomembranes. The artificial biomembranes can be manufactured by mechanization and large-scale production, with simple process of immobilization, high efficiency and low cost.