Abstract

This invention belongs to the field of biomass energy utilization at the large scale. A material stirring device for a biomass bin includes a transmission mechanism, a main stirring mechanism, and an auxiliary stirring mechanism. The main stirring mechanism includes a cylinder connected to the transmission mechanism. The outer wall of the cylinder is provided with a hollow stirring rod. The auxiliary stirring mechanism includes a rotating shaft vertically penetrating through the hollow stirring rod. Both ends of the rotating shaft are provided with stirring blades and the rotating shaft is connected to the transmission mechanism. That the stirring device is easily damaged due to too high density of the biomass material is overcome through the automatic conversion adjustment of the main and auxiliary stirring mechanisms. The continuous discharge efficiency of the biomass bin is improved by the organic integration of over and partial stirring.

IPC Classes  ?

• B01F 7/00 - Mixers with rotary stirring devices in fixed receptacles; Kneaders
• B01F 7/28 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a vertical axis with cylinders
• B01F 7/04 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles or arms
• B01F 7/14 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with stirrers having planetary motion

Abstract

Provided is a metal nanoparticle/nanocellulose composite-based enzyme-free glucose electrochemical sensor, comprising a three-electrode system composed of a working electrode, a counter electrode and a reference electrode. The surface of the working electrode is covered with a nanocellulose/metal nanoparticle composite, and the surface of the nanocellulose is modified with a strong cation conductive polymer. A corresponding preparation method for the sensor comprises: modifying the surface of nanocellulose with the strong cation conductive polymer; then in-situ depositing the metal nanoparticles onto the surface thereof, so as to prepare the nanocellulose/metal nanoparticle composite; and modifying the working electrode with the composite. The working electrode improves the sensitivity and selectivity for glucose analysis, so that the sensor has high sensitivity, quick response, stable performance and strong anti-interference capability. The linear detection range for glucose is 4 ì M-15 mM and the detection limit is 1.4 ì M. The preparation method therefor is simple and low in cost, and no enzyme is introduced during the preparation.

IPC Classes  ?

• G01N 27/30 - Electrodes, e.g. test electrodesHalf-cells
• G01N 27/26 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variablesInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by using electrolysis or electrophoresis

Abstract

A material stirring device for a biomass bin includes a transmission mechanism, a main stirring mechanism, and an auxiliary stirring mechanism. The main stirring mechanism includes a cylinder (11) connected with the transmission mechanism. The outer wall of the cylinder (11) is provided with a hollow stirring rod (12). The auxiliary stirring mechanism includes a rotating shaft (22) vertically penetrating through the hollow stirring rod (12), both ends of the rotating shaft (22) are provided with stirring blades (23), and the rotating shaft (22) is connected with the transmission mechanism. The structure of the device is simple, and the disadvantage that the stirring device is easily damaged due to too high density of the biomass material is overcome, through the automatic conversion adjustment of the main and the auxiliary stirring mechanisms.

IPC Classes  ?

• B01F 7/00 - Mixers with rotary stirring devices in fixed receptacles; Kneaders
• B01F 7/02 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis