| 摘要 |
<p>A description is provided of a method as well as a cooler (1) for cooling hot particulate material which has been subjected to heat treatment in an industrial kiln, such as a rotary kiln (3) for manufacturing cement clinker whereby the hot material from the kiln (3) is directed onto a grate (21) in a cooler (1) where cooling gases via at least one cooling gas duct (28) are directed through slots (20) in the grate for cooling the hot material and where compressed air can be injected into the material on the grate (21). The method as well as the cooler is characterized in that compressed air is injected into the cooling gas duct (28). It is hereby obtained that the compressed air which is injected into the cooling gas duct (28) will operate as a non-return valve which will ensure that compressed air is injected into the material on the grate (21). This is due to the fact that the mass flow inertia and the dynamic pressure of the compressed air being injected into the cooling gas duct (28) will prevent a backflow of the compressed air into the cooling gas duct (28). The blanking-off of the cooling gas duct (28) thus achieved will further prevent clinker dust from falling through the cooling gas duct.</p> |
