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160 results on '"WANG Cai-ping"'

3. Design of Wireless Remote Monitoring and Early-warning System of Coalfield Fire

Author

WANG Wei-feng, DENG Jun, WANG Cai-ping, and FEI Jin-biao

Subjects
coalfield fire, remote monitoring, early-warning, wireless communication, zigbee, gprs, internet, Mining engineering. Metallurgy, TN1-997
Abstract

In view of problems that forecast range is small, work load of installation and maintenance is large, and real-time monitoring and early-warning cannot be provided existed in traditional temperature monitoring systems of coalfield fire area with manual detection way, a wireless remote monitoring and early-warning system of coalfield fire based on technologies of ZigBee, GPRS and Internet. Through wireless temperature measuring terminal and gateway which are set at each monitored point, the system sends collected temperature signal to GPRS network, and the signal is accessed into Internet network through SGSN and GGSN. Then server of upper computer monitoring center of the system connects with Internet network and displays the monitoring interface by web page, so as to realize function of remote monitoring and early-warning for coalfield fire area. The field test result showed that the system solves problem of remote and real-time monitoring and early-warning for coalfield fire and has certain practicality.

Published
2012

20. Flame retardancy and smoke suppression of silicone foams with modified Diatomite and Zinc Borate.

Author

Wang, Cai-Ping, Qiao, Xian-Ting, Kang, Fu-Ru, Li, Hang, Deng, Jun, Xiao, Yang, and Lv, Chun-Hui

Subjects
FIREPROOFING, DIATOMACEOUS earth, FOAM, HEAT release rates, ENTHALPY, SMOKE
Abstract

To improve the flame retardant performance of silicone foams (SiFs), this paper used modified Diatomate (Dia) and zinc borate (ZB) to prepare flame-retardant SiFs. The experiment applied to study the particle size distribution and surface element content changes before and after modification. Then, the influence of modified Dia and ZB on mechanical, flame retardant and smoke suppression properties were investigated by stretch test, limiting oxygen index (LOI) test, UL-94 test, cone calorimeter test, and smoke density analysis test. The mechanical properties showed that the tensile strength and elongation at break of SiFs with 3.75% modified Dia and 1.25% ZB were improved significantly. In addition, the LOI of SiFs with 3.75% modified Dia and 1.25% ZB was 33.6%, which passed UL-94-V-0. The peak heat release rate (PHRR) and total heat release (THR) were 48.3% and 52.2% lower than that of pure SiFs, respectively. At the same time, SiFs with modified Dia had a better smoke suppression effect. Particularly, the total smoke production (TSP) and smoke production rates (SPR) of SiFs with 3.75% modified Dia and 1.25% ZB were reduced by 98.2% and 84.6% compared with pure SiFs. [ABSTRACT FROM AUTHOR]

Published
2024
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45. Thermokinetic Characteristics of Coal Combustion under High Temperatures and Oxygen–Limited Atmospheres.

Author

Wang, Cai-Ping, Duan, Xia-Dan, Xiao, Yang, Li, Qing-Wei, and Deng, Jun

Subjects
HIGH temperatures, COAL combustion, SPONTANEOUS combustion, THERMAL analysis, DISCONTINUOUS precipitation, ATMOSPHERE
Abstract

Coal fires are widespread in the coal–major producing countries, which causes serious environmental issues due to the high temperature and hazardous gases during coal combustion. Under oxygen–depleted atmospheres, the thermal behaviors and kinetic characteristics during coal combustion at high temperatures were paid more attention by the method of TG–DSC synchronous thermal analysis. The results indicate that the focused weightlessness and heat release processes became scattered under oxygen–depleted atmospheres, and the influence of oxygen concentration obviously increased when it was below 13 vol.%. The mass presented a linear correlation to the quantity of heat release, and the relationship between the mass and quantity of heat release showed stage characteristics with oxygen concentration. Moreover, the kinetic modes transformed from random nucleation and subsequent growth to contractive sphere, and the critical oxygen concentrations are consistent to these of thermal behaviors. These findings are significant for better understanding the characteristics of coal spontaneous combustion at high-temperature and under low-oxygen concentrations. [ABSTRACT FROM AUTHOR]

Published
2022
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