In the case of ensuring the drying effect of the drying kiln or at least ensuring that the drying kiln does not collapse, the heat extraction of the cooling zone of the baking kiln can be appropriately reduced.

According to the heat balance calculation of the kiln manufacturer, the heat required for artificial drying accounts for about 30% of the total heat of the kiln. If measures can be taken to reduce this proportion to about 20%, a large amount of heat can be saved and the degree of under-fire of the finished brick can be reduced accordingly. The following measures can be taken:

A. make full use of the blank storage line, and let the well-coded brick blank be fully dehydrated at the ambient temperature on the blank storage line. Every 1% decrease in the moisture content of bricks entering the drying kiln can correspondingly reduce the heat consumption of the drying kiln by 6% ~ 8%;

B. can use the drying principle of low temperature and large air volume, in the case of slightly lower air supply temperature, take measures to increase the air volume, but also can achieve better drying effect. This purpose can be achieved by adding more cold air to the air inlet of the heat exchange fan;

c. It is also a good energy-saving measure to send part of the high-temperature flue gas of the exhaust fan into the drying kiln;

D. low temperature hot air extracted from the bottom of the kiln (usually 60 ℃ ~ 80 ℃), the use of hot air fan into the drying kiln, can also save part of the heat of the kiln;

E when the above measures are taken (the above measures c and d are actually energy-saving measures taken during kiln design. if the measures are not taken during design, it is difficult to implement on-site operation) when the residual moisture content of brick blank drying exceeds the standard (we generally require that the average residual moisture content of brick blank drying is less than 2%, the smaller the better), it can be matched with tropical sluices to ensure the firing quality, although this is somewhat contradictory to measure d, the use of bridge gate is a compromise method, which can not only ensure the firing quality of bricks with high residual moisture content, but also avoid wasting a large amount of heat.