Atomization characteristic test and application effect analysis of dust removal nozzle in fully-mechanized mining face
Aiming at the problems of large dust production and unsatisfactory dust removal effect in fully-mechanized mining face,the at-omization characteristics of dust removal nozzles with various parameters under multi-factor disturbance were tested by the three-phase coupling test system of air flow,fog droplet and dust.The macroscopic atomization characteristics were analyzed under the spray pressure of 2～8 MPa,and the nozzle with large atomization angle,long effective range and relatively small flow rate was optimized.Under the disturbance of air flow,pressure and its own structure,the meso-atomization characteristics of droplets,such as particle size and veloci-ty,and the atomization efficiency were tested.The E type 2.0 mm solid conical wide-angle nozzle was optimized,which can be used for the dust removal of hydraulic support negative pressure coiling dust collector and the negative pressure fog curtain of road header.After field application,the dust concentration of fully-mechanized caving face total dust removal efficiency was ≥91.4％,respirable dust re-moval rate was≥85.7％;the dust concentration of fully-mechanized mining face total dust removal efficiency was ≥93.4％,respirable dust removal rate was ≥86.7％,improving dust hazard and working environment of fully-mechanized mining face and provides techni-cal support for dust control of coal mine.
NETL
NSTL
万方数据
