Spreading fast and being difficult to control and put out, train fire hazard can bring property loss, threat passenger's lives. Therefore, the fire protection on train is very important. Being one of the very impo...
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Spreading fast and being difficult to control and put out, train fire hazard can bring property loss, threat passenger's lives. Therefore, the fire protection on train is very important. Being one of the very important factors of early fire warning, the research on smoke detection at smoldering combustion stage of train fire hazard and the interference factors can provide references for the train fire protection and the design of train AC system.
Recovery of phenol from the wastewater produced in the multi-cogeneration system has been studied. Based on the experimental results and theoretical analysis, butyl acetate was selected as the extractant and 99.95% of...
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Recovery of phenol from the wastewater produced in the multi-cogeneration system has been studied. Based on the experimental results and theoretical analysis, butyl acetate was selected as the extractant and 99.95% of the volatile phenols in the wastewater was recovered in five stage extraction. The solvent recovery in the distillation column and the stripping column were also considered. Moreover, Aspen Plus was used for the simulation of the phenols extraction in the extraction column. Final result shows that phenol is much more difficult to be recovered because of its lower distribution coefficiency among the volatile phenols. The least solvent flow can also be found at different theoretical stages for the special environmental restrictions.
This paper studied the wastewater treatment in GAO Yang Dyeing and Textile Industrial Park, with the dealing capacity of 19 × 104 ton/d, on its wastewater discharge, water reuse, energy saving and resources utili...
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This paper studied the wastewater treatment in GAO Yang Dyeing and Textile Industrial Park, with the dealing capacity of 19 × 104 ton/d, on its wastewater discharge, water reuse, energy saving and resources utilization. Through the process optimization consisted of the enhanced chemical conditioning, diagonal up-flow anaerobic reactor, intelligent closed-loop oxygen supply system, double membrane water recycle process and sludge drying- burning circulation, the effluent water all reached the "Emission Standards for Municipal Wastewater Treatment Plant", (GB18918-2002) Alevel, the whole system operated steadily for 2 years and achieved tremendous economic and environmental benefits.
Due to rapid industrialization especially information industrialization, China is faced with serious shortage of electronic materials, while management system on e-waste has been put on the agenda. Guiyu town in Guang...
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Due to rapid industrialization especially information industrialization, China is faced with serious shortage of electronic materials, while management system on e-waste has been put on the agenda. Guiyu town in Guangdong province, China has been known by international community by its improper e-waste importing and recycling, this research reviewed the past, current status of e-waste dismantling industry in this region. It was suggested that efforts should be made through the first batch national circular economy pilot projects in the region to promote a local circular society, and informal e-waste recycling system should be transformed.
Unreasonable activities of mankind in water resources exploitation have deteriorated the natural environment, intensifying the conflicts between human beings and the nature. Environment and natural disasters have brou...
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Unreasonable activities of mankind in water resources exploitation have deteriorated the natural environment, intensifying the conflicts between human beings and the nature. Environment and natural disasters have brought forward rigorous challenge on the survival and development of the mankind. The concept of environmental variation is proposed in analyzing the processes of environmental change, and the reparation methods for fluvial environment variation have been stated as well. Styles of fluvial environmental variation can be classified according to characteristics of river and human activities. The characteristics and the consequences of the environmental variation in the estuary of Yellow River are analyzed, so has the control method.
A demonstrative solar greenhouse with underground pebble bed thermal storage was established and compared with a control case greenhouse. According to the experimental results, the thermal storage power of the pebbled...
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A demonstrative solar greenhouse with underground pebble bed thermal storage was established and compared with a control case greenhouse. According to the experimental results, the thermal storage power of the pebbled bed system is more than that of the buried pipe system, with values, 94 W/m 2 and 76 W/m 2 , respectively. The lowest night temperature of the solar greenhouse with thermal storage is 5~8°C, which is higher than that of the greenhouse without thermal storage. And the temperature difference of day and night in the solar greenhouse is decreased, which is benefit for the thermophilic crops to live in the winter.
Using strain JM-1 producing biodemulsifier isolated from cold rolling plant emulsion wastewater as the starting strain, the optimum preparation conditions of the biodemulsifier were obtained by the experiment of carbo...
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Using strain JM-1 producing biodemulsifier isolated from cold rolling plant emulsion wastewater as the starting strain, the optimum preparation conditions of the biodemulsifier were obtained by the experiment of carbon source, nitrogen source, trace element, and ratio of carbon to nitrogen. The concentration of the lipopeptide reached 1.62 g/L, which was 22.73% higher than un-optimized. The biodemulsifier preparation kinetics were investigated. The kinetic models of strains growth and lipopeptide formation were established by Matlab, providing a good description of temporal variations of biomass, and product in JM-1 fermentation. These models were applied to guide the industrial production of the biodemulsifier.
Thermoplastic soy protein isolated (T-SPI) was synthesized by graft copolymerization of methyl methacrylate (MMA) onto soy protein isolated (SPI). T-SPI and SPI were characterized by means of FTIR, DSC, TG and so on. ...
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Thermoplastic soy protein isolated (T-SPI) was synthesized by graft copolymerization of methyl methacrylate (MMA) onto soy protein isolated (SPI). T-SPI and SPI were characterized by means of FTIR, DSC, TG and so on. The results showed that the monomers were grafted onto the SPI successfully. Compared with SPI, T-SPI improved its thermal stability markedly, and appeared a glass transition at 124°C. The introduced monomers could make the rigidity decreased obviously, which made the materials more flexible and fluid in processing from the result of Torque rheometer. In a word, the T-SPI was a good thermoplastic and stability material.
The performance of 3 types of energy utilization cycles including the organic Rankine cycle, the single stage static hydrogen compression cycle, and the new multistage continuous hydrogen compression cycle were analyz...
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The performance of 3 types of energy utilization cycles including the organic Rankine cycle, the single stage static hydrogen compression cycle, and the new multistage continuous hydrogen compression cycle were analyzed. A multi-element valued model was used to evaluate the performance holistically, and the result showed that the integrated superiority achieved 0.721, which indicated the continuous hydrogen compression cycle is considered the best option among the typical compression energy utilization cycles and deserves thorough studying.
To solve the problem of excessively high resonant voltage in shift-phase full bridge convertor rectifying voltage output, this paper first analyzes the composition of the voltage, indicating that the voltage is compos...
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To solve the problem of excessively high resonant voltage in shift-phase full bridge convertor rectifying voltage output, this paper first analyzes the composition of the voltage, indicating that the voltage is composed of three parts, and analyzes emphatically two parts of the three. Secondly, in the paper is selected the most practical topology of RCD snubber, and models rectifying voltage output according to circuit equivalent theory. Moreover, reasonable parameters of RCD snubber are also presented in the paper. At last, the paper presents the simulation result in MATLAB, adopting the model and RCD parameters derived above. The topology and parameters are subjected to a prototype equipment to testify its effectiveness.
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