改进烟气加热刨花干燥机的探讨

<正>目前,国内刨花板工厂或车间使用的烟气加热刨花干燥机存在着两个缺点,即在操作过程中,未完全燃烧或带有明火的炭粒可能会污染刨花和引起失火。为了改进其性能,我们进行了四方面的试验: 1.在烟气发生炉内增设了一道挡火墙,显著改善了刨花污染程度,并避免了刨花与明火的直接接触, 2.分段制造干燥转筒,减少了中小型刨花板工厂在制造,安装和维修干燥机方面的困难; 3.干燥机使用了司·控硅无级调速,干燥转筒的转速可以在2—16(r.p.m)范围内调节; 4.增设了简易防火装置,保证干燥转筒内烟气温度始终低于刨花着火点。 这种经过改进的新型烟气加热刨花干燥机已经使用二年多时间,效率和性能都比旧式烟气加热刨花干燥机好。

SOME IMPROVEMENTS IN THE DIRECT-FIRE TYPE DRYER FOR DRYING PARTICLES IN PARTICLEBOARD MANUFACTURING

Two disadvantages exist in the direct-fire type dryer for particles in particleboard factories at home today, namely, the possible pollution by the unburned coal dust and the accidental fire that may occur in particles in the rotary drum. In order to raise its efficiency, some improvements have been made in four respects:(1) An additional wall has been placed in the combustion chamber, which greatly decreases pollution and keeps away the fire from particles.(2) The rotary drum has been broken down into two parts, so that difficulties in manufacturing, installing and repairing a dryer for a medium or small sized factory would be reduced.(3) A SCR stepless speed regulator has been introduced in the dryer. The speed of the rotary drum can be adjusted in the range from 2-16 r. p. m.(4) A simple device for controlling fire has been added to the dryer to make the temperature of the mixed gas in the rotary drum to be always below the burning point of particles.This improved new type dryer has been put to use in particleboard factory for over two years. Its efficiency and properties have proved much better than those of the old type.