This paper mainly introduces that the wheat straw, attapulgite and phenolic resin, curing agent respectively usded as raw materials and the auxiliary materials , and those were finally prepared as a new composite carbon material through the processes of mixing, drying ,hot pressing, as well as high temperature sintering. The different sintering temperatures and different ratios of different materials were fabricated, then the material physical strength, density, porosity, strength, resistivity and other properties were tested. After which, the performance, formation mechanism and formation law were analyzed ,the effect of the choice and ratio materials and the temperature to the preparation as well as the properties of composite materials were preliminarily discussed, Identified as wheat straw: attapulgite = 2: 1; 3: 1, a temperature of 700 to 800 DEG C when all the material physical properties of ideal.. This experiment showed that wheat straw as raw materials for preparing attapulgite feasibility. At the same time, the presented work also opens up new research directions to the reuse utilization of wheat straw ,the application of attapulgite as well as research of woodceramics composites.
This paper used wheat straw and palygorskite clay as raw materials, and phenolic resin as adhesive. By the technologies of powdering, mixing, solidifying, molding and sintering, the palygorskite clay Modified woodceramics were obtained. And it made use of these porous composite materials to research the adsorption of the phenol wastewater, which explored the adsorption effect of the composite materials on phenol and found out the optimum conditions of adsorption by changing the ratio of raw materials, sintering temperature, dosage of composite materials, oscillating time and pH.
The result of the palygorskite clay Modified woodceramics prepared by different dosing ration of raw materials and sintering temperatures on phenol showed that the removal effect of the composite materials (wheat straw: palygorskite clay=5:1, sintering temperature = 900 °C) on phenol was best.
Using the palygorskite clay modified woodceramics to adsorb the phenol wastewater. It turned out that when the dosage of the composite materials was 0.5 g, the Oscillating time was 60 mins, and the solution temperature was 25 °C, the composite materials adsorption efficiency on phenol was the highest. In addition, the higher the phenol solution concentration and pH, the lower the adsorption efficiency was. What's more, the absorbability of the composite materials on phenol corresponded with Feundlich adsorption model, and the saturated adsorption was 45.66 mg/L, which indicated that the palygorskite clay Modified woodceramics had strong adsorption effect to phenol.
The waste cooking oils was prepared into biodiesel by transesterification. The optimum conditions are: waste oil 73 g, temperature 60°C, methanol solution25 ml, NaOH amount 1.0 g and reaction time 60 min. The properties of biodiesel are close to that of 0# diesel.
Contrast advantages and existing problems of resistance strain slice and fiber grating strain sensor for tower vibration strain monitoring, compare the structure of the two, and do the on-site installation and experiments, analyze the monitoring data. It can make a conclusion that the properties of fiber bragg grating strain sensors are basic consistent with resistance strain slice. And fiber bragg grating strain sensors can be used for transmission tower vibration monitoring .
Since indoor particles accumulate on the floors easily, there is a high possibility of allergic reactions in child whose breathing zone is near the floor surface. Ventilation is one of the best ways to remove indoor particles. The aim of this study is to clarify the diffusion characteristics of indoor particles in different ventilation strategies room by experiments and CFD. Comparison of the number of particle in experimental monitoring point shows that the number of particle in the ceiling exhaust was a little higher than the slit exhaust ventilation strategy. CFD simulations concerning diffusion fields completed. From the data we can conclude that slit exhaust ventilation strategy will produce less indoor particles in the room to compare ceiling exhaust ventilation strategy.
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