喷雾降尘效率及喷雾参数匹配研究

采用压力型雾化喷嘴沉降煤矿粉尘简单实用。为了更好地利用喷雾技术高效沉降作业场所的粉尘,采用理论分析的方法得到水雾粒度与水压力之间的关系曲线,进一步得到喷雾降尘效率与水压力之间的关系曲线,并在煤矿井下进行试验验证。从而得出高效沉降粉尘应该用小口径喷嘴和较高的喷雾压力,但应限制在10MPa以下,超过该限值,降尘率提高甚微。2MPa以下的喷雾压力,降尘效率超不过50%,对水资源是一种浪费。当限定喷雾系统的水量消耗时,应采取减小喷嘴口径或减少喷嘴数量的方法获得较高的喷雾压力,从而获得较高的降尘效率。

Study on Efficiency of Dust Suppression by Mist Spray and Its Matched Parameters

Suppressing coal dust by pressured mist nozzle is simple in use. Through theoretical analysis, a correlation in-between the size of mist paniculate and water pressure could be obtained. A correlation curve between the efficiency of dust suppression by mist spray and water pressure is obtained in order to fully use of this technology in on-site dust suppression. The result is exemplified and verified in the coal mine pit. It is concluded that nozzle with mailer calibre and higher pressured water should be used in order to obtain high suppression efficiency. The pressure should be controlled below 10 MPa. Once this limit is exceeded, the efficiency would be raised very minute. If the water pressure is kept below 2MPa, the efficiency would not exceed 50%, and the water resource would be wasted. When the water consumption is limited, the calibre of the spray nozzle should be smaller or the number of nozzles used should be reduced in order to get higher spray pressure, in turn, to get higher dust suppression efficiency.