In recent years, many manufacturers want to substantially increase the quantity, reduce coal consumption through the transformation of rotary dryer. But the reforming effect of some manufacturers is not ideal, or even emerging the situation of the cylinder liner wear quickly, the under barrel and the head of the rotary dryer easy to burn out and the bag type dust collector using a shorter life, and the repairing cost is high and seriously affecting the normal production of the dryer.
Rotary dryer is mainly for dealing with material in large quantities. As reliable operation, operating flexibility, adaptability and large capacity, this dryer is widely used in metallurgy, building materials, food, light industry, chemical industry, coal, medicine and mining industries.
It is not the reason of technical reformation problem, the effect of some technical transformation is very good, such as the installation of X shape lifting plate. Now many equipment manufacturers have adopted this technique, the main reason of affecting the effect is that the main emphasis on the dryer is transformed locality instead of modifying the dryer from the whole drying supporting system. The announcements in modifying the rotary dryer are as follows:
The inner transformation of the dryer:
The reconstruction investment of the rotary dryer is small and the transformation is relatively simple, but before the modifying you must understand the structure of the dryer, you can make a viable transforming measure according to the daily experience. General transformation steps:
(1) Install a center X type material-raising plates to reduce heat empty hole, prolong the remaining time of materials, improve the heat exchange efficiency and reduce the loss of high temperature gas.
(2) Remove the feed end of spiral conveyor leaf and replace by the triangular plate.
(3) Transform the feeding tube angle.
(4) Modify the L shaped tail lifting plate in the low temperature drying area.
Attention the balance between winds, fire, material:
The main base of gaining high quality and high yield is to achieve the” wind, fire, material balance”. Firstly determine the dust ventilation, drying machine specifications, models and the effect of reconstruction, the combustion furnace heating size matching. Secondly we should strengthen the operation.
The ventilation effect of the dryer directly influences the yield level of production. If you want to have a high yield, you must select the dust collector of larger dealing capacity. Ensure the drying machine feeding end of certain negative pressure, timely absorb the high temperature gas generated by combustion furnace to to dryer and timely promote the heat exchange, as far as possible to reduce the concentration of the waste and achieve rapid drying purpose.
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