| 摘要 |
<p>A plant is disclosed for burning granular or pulverous material, particularly in the form of cement raw materials to be burnt to cement clinker. A preheater comprises at least two cooperating units, each with its own heating gas or air inlet and outlet and raw material inlet. A kiln to which preheated raw material is fed from the preheater has associated cooling means for cooling material burnt in the kiln. Heated cooling air leaving the cooling means is divided such that a part is led as combustion air to the kiln and a part is led to the air inlet of one preheater unit, the gas inlet of the other preheater unit being connected to an exhaust gas outlet from the kiln, and each unit each having at or near its gas or air outlet, its own means for controlling the air or gas flow through that unit and hence the division of the heated cooling air.</p> |
