Friday, August 29, 2014

How to Optimize Combustion in Rotary Kilns | eHow

How to Optimize Combustion in Rotary Kilns | eHow

A rotary kiln, often used the production of gray and white cement, lime and nickel, as well as in waste management, can be optimized successfully in terms of its combustion rate. 

Kiln simulations offer an experimental way of predicting which changes of the kiln's structure, temperature, burner position and flame shape will result in enhanced combustion in real world applications, many of which have been tested with measurable increases in combustion rate and burn efficiency.

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1. Increase the air flow to the burners to create a smoother combustion process. Improve the symmetry of the flame inside the burner for more efficient combustion. Distribute the air flow more evenly around the combustion chamber. Simulations show that the influence of combustion air distribution is very large and offers an excellent way of increasing the incident radiation received by the clinker bed, according to Fives Group.

  • 2. Add hot, secondary air to the flame inside the combustion chamber to increase the temperature of the flame and to radiate more heat towards the calcinated bed. Install a modern replacement burner with temperature distribution capabilities. Keep the hot gas primary inflow temperature at 550 degrees Celsius. Measure temperature using a heat-resistant probe. Ensure the cooler, secondary air channel remains constant at 20 degrees Celsius. Measure the tube connected to the kiln hood using a tape measure. Replace it with a 315-feet long stainless steel tube if it is not the correct size.
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