4 results about "Oxygen excess" patented technology

The utility model discloses an iron oxide calcining furnace based on oxygen waste heat recovery, which comprises a transversely arranged fixed furnace body, a rotating roller is arranged in the fixed furnace body, a calcining area is reserved between the rotating roller and the inner side furnace wall of the fixed furnace body, two sides of the rotating roller are provided with rotating shafts, the rotating shafts correspondingly extend out of the fixed furnace body, and the rotating shafts are arranged in the calcining area. And a rotating motor is correspondingly mounted on the left rotating shaft. The waste heat recovery pipe is arranged in the device, collected waste heat is injected into the solid furnace body for calcination of ferric oxide, energy can be effectively saved, and then the calcination effect can be effectively improved by being matched with other arranged heating elements and the like; according to the device, the area between the fixed furnace body and the rotating roller is the calcining area, the material stirring plate installed on the rotating roller can correspondingly achieve the material stirring function, ferric oxide can be evenly placed in the calcining area, and the calcining effect is improved.

The invention relates to a method for operating a fuel cell system (FCS) in different operating modes, in which different limit values ​​(k1, k2, k3, k4) for control variables (RG): - an exit activity (a out ), - an exit oxygen partial pressure (p O2out ) and / or - a flow velocity is used in a cathode path, where different control variables (CV): - a pressure (pair) of an inlet air or an inlet oxygen partial pressure (pO2in), - an excess of oxygen (λO2), - a stack stream (iS) and - a stack temperature (T S ) based on limit values ​​(k1, k2, k3, k4), which are particularly relevant in cost functions (f Grenz,Aktiv , f Grenz,Partial ) for the control variables (RG) are taken into account and set in an optimization-based manner.

The invention provides a method and device for adjusting the liquid level of an overflow tank in a large-scale exhibition culture pond body of an aquarium, and relates to the technical field of exhibition culture of the aquarium, the method comprises the following steps: determining the target oxygen exchange flux needing to be contributed or removed by the overflow tank according to the oxygen mass balance requirement of the large-scale exhibition culture pond body of the aquarium; obtaining a target oxygen mass transfer coefficient based on the target oxygen exchange flux; obtaining a target water flow velocity based on the target oxygen mass transfer coefficient; obtaining a target water level fall based on the target water flow velocity; and adjusting the liquid level of the overflow tank according to the target water level difference. Through a set of systematic and closed-loop calculation and adjustment steps, the complex oxygen balance requirement is efficiently converted into a specific and controllable overflow tank liquid level adjustment scheme, and scientific and quantitative management of the aeration rate of the overflow tank is achieved; the problem that in the aquarium field, due to the fact that liquid level adjustment cannot be quantitatively guided, aeration is insufficient or oxygen is excessive, and breeding species are threatened is solved.

This invention discloses a combined wastewater treatment device and method with stratified aeration, relating to the field of wastewater treatment technology. By having a first aeration mechanism and a second aeration mechanism respectively positioned on opposite sides of the bottom of the aeration tank, and utilizing a lifting mechanism for dynamic adjustment, oxygen can be delivered to different water layers at the bottom, middle, and top of the tank. This satisfies the oxygen requirements of aerobic microorganisms at different heights, avoiding the problems of oxygen excess at the top and oxygen deficiency at the bottom caused by traditional uniform aeration, thus improving wastewater treatment efficiency. Through the lifting mechanism design, the suspended cylinder achieves automatic levitation via air bladders. Combined with real-time position monitoring by distance sensors, the controller adjusts the air supply of the blower according to the distance gradient from the top of the tank, reducing ineffective aeration energy consumption. This achieves the dual effect of providing sufficient oxygen at different water layers while saving energy consumption. Furthermore, the lifting mechanism is driven by pneumatics, eliminating the need for an additional motor, reducing equipment complexity and maintenance costs.