Structure and system optimization design of the new lime kiln

CHAENG(Great Wall Machinery)New lime kiln structure and system optimization is designed as follows:

1, the kiln burner orifice hood position adjustment. The original design of the burner and kiln hood center hole down the center, to the right are eccentric 300mm, based on past experience in actual production, changes in the design of the burner hole kiln hood center position. Roasting better.

2, the kiln was cooled using a cooler alternative to the original vertical cooling tube. Avoid lime sensible heat loss. Hot lime kiln from falling through the secondary air heat exchanger and into the drum, the lime is cooled. After elevating the temperature of air to absorb heat of combustion into the rotary kiln.

3, the installation of a vertical preheater kiln, so kiln flue gas heat conduction directly to the limestone flue gas temperature can be reduced to below 235 ℃, effectively recycling the exhaust emissions of the heat away, but also for subsequent removal to reduce the load. Preheater Level adjustment device can preheater height of the material is adjusted according to the level of granularity calcined material, thereby changing the preheating time and material preheater material layer resistance.

4, improved kiln shut and sealed manner. To this end we expanded sectional size kilns and kiln sealing method, increase feed back means back to scoop and end flanges using heat-resistant steel material. In addition, kiln feed chute under the pallet expanded diameter and length, to prevent back feed.

5, the cooler is divided into four areas, each discharging speed can be individually controlled. Cooling air and direct contact with hot material, good cooling effect, the ash temperature is less than 100%. Secondary air can be preheated to a temperature above 600 ℃, is conducive to firing. Cooler and kiln hood with integrated vertical design, small size, good sealing, to avoid the hot exhaust gas fugitive emissions.

6, the combustion air is divided into primary and secondary air. Directly involved in the primary air combustion, secondary air for the cooling air. Primary and secondary air are supplied by a separate fan to provide favorable conditions to save fuel.

7, measures to improve environmental protection. Calcination exhaust using pulse jet bag filter dust, to meet the national emission standards. In the vertical blanking point cooler it is also used baghouse dust.

8, using a dedicated combustion system to the rotary kiln heating. In addition to the use of pulverized coal as a fuel can also be used alone outside the low calorific value gas (such as producer gas, calcium carbide exhaust, semi-coke gas) calcined as fuel to be supplied simultaneously using a variety of fuel use. The calcination temperature can be adjusted by adjusting air and gas flow.

9, the burner combustion system, adjusting the control devices and other components. Multi-channel burner burner can burn gas, reasonably solid, liquid fuels, structural design, easy operation, can maintain flame stability, and can change the shape of the flame, burning to achieve the desired effect. Multi-channel multi-fuel burner can achieve a variety of fuel co-firing.

10, high level of automation. Calcining system equipment manufacturing operations adjustment, control and alarm in the main control room centralized control by PLC, and a screen display of the control points and the necessary interlock monitoring of the operating parameters in the production process used for automatic recording, and ready to print.

In short, the advanced design of the new lime kiln, energy saving system, greatly enhance the comprehensive cost-effective, the devices have become advanced rotary kiln equipment.