Double-Beam Lime Kiln

1. The kiln body is quasi-rectangular or circular. There are upper and lower layers of burner beams in the kiln body, and a layer of exhaust gas suction beams in the upper and lower parts of the kiln body. They divide the kiln into five zones, namely the storage zone, the pre-heating zone, the calcination zone, the post-calcination zone, and the cooling zone.

2. The use of two-layer combustion beams is the characteristic of this kiln type. The burner evenly distributes the fuel (gas, liquid, solid) to the kiln section and evenly mixes it with the combustion air for combustion. The number and distribution of burners should be adjusted according to the kiln type. In this way, the uniform temperature distribution on the entire kiln section is ensured, and efficient and uniform calcination is realized, so that the rate of overburning of lime is low and the activity of lime is increased.

3. There is a layer of exhaust gas suction beams on the upper part of the kiln. The kiln gas is drawn out by the suction beam through the opening to ensure that the negative pressure distribution of the entire kiln section is even. The extracted waste gas exchanges heat with the combustion-supporting air so that the heat energy can be fully utilized.

4. Two-way pressure system is another important feature of this kiln. The secondary air is blown in by a fan and enters the cooling zone through a special-shaped distribution beam to cool the lime evenly and maintain positive pressure in the kiln from below the calcination zone. Compared with the full negative pressure system, it is easier to accurately control the primary and secondary air volume. The flue gas produced by calcination is discharged from the top of the kiln body, so that the negative pressure is maintained above the calcination area in the kiln, so that the heating temperature on the kiln section is uniform. The air volume adjustment range is from 10-100%. By adjusting the combustion air volume required for balance, the kiln can work under the best operating conditions, so as to ensure good combustion, reduce heat consumption, reduce power consumption, and reduce production costs.