Energy cost of Fixed chimney kilns
Fixed chimney kilns Variations in chimney dimensions and in flue duct design and arrangement, results in different types of fixed chimney
designs. The most popular fixed chimney design (which we will refer as “traditional fixed chimney” ) is found all over north and east India.
After the announcement of the emission standards, two new designs –Priya/PSCST1 and CBRI2 (figure 2 and 3), which are essentially an
improvement over the traditional fixed chimney design have also been developed. In all the three designs the chimney is located in the
center of the kiln. The main features of the three designs are given in the table 3.
| Traditional | Priya/PSCST | CBRI | |
| 1. Chimney height | 65 -100 ft | 120 ft | 120 ft |
| 2. Chimney cross-sectional area | |||
| a. Top opening | 5 -12 sq. ft. | 16 -25 sq. ft. | NA |
| b. Bottom opening | 50 -80 sq. ft. | 225 sq. ft | |
| 3. Flue duct cross-section area | 2 ft x 5 ft | 4 ft x 4 ft | NA |
| 4. Gravity settling chamber | No provision | Provided at the | Two –one on |
| base of the | each side of the | ||
| chimney | chimney. | ||