In a natural draft zig-zag eent Bhatta, bricks are set in five lines in each chamber. A gap of five inches is maintained between adjacent lines for the flow of air. The width of a column of green bricks caries with the width of the trench and the production capacity of the kiln. For a trench width of 33 feet and a daily brick production of 44,000 bricks (and triple zigzag pattern),
two columns of four bricks, two columns of 10 bricks, and 12 columns of six bricks are recommended.
In induced draft brick kilns, the size of each chamber is around six feet. Bricks are set in six lines in each chamber; the length of each line is equal to the length of a brick. A three-inch gap is maintained between adjacent lines to help airflow. Green bricks are stacked in columns, the width of which depends on the width of the trench and production capacity.
For a trench width of 33 feet and a daily brick production of 55,000, two columns of four bricks, four columns of six bricks, and 10 columns of seven bricks are recommended.
CHAMBER LENGTH OF ZIG ZAG EENT BHATTA
In general, the length of the chamber varies from six to nine feet. The better zigzagging of the airflow can be achieved by decreasing the length of the chamber. Therefore, six feet long chambers are recommended for both induced and natural draft zigzag kilns.
Desing of zig zag eent bhatta
the production capacity of a kiln and the size of the bricks produced are the two most important factors determining the design of the kiln. In the Delhi NCR region, the brick size is generally 9 x 4.5 x 3 inches.
For the same trench width, about 10,000 more bricks can be fired per day in an induced
draught kiln as compared to natural draught zigzag kiln, because the brick setting is denser.
In this section, we have taken an example of a kiln with a production capacity of 44,000
bricks per day for the natural draft and 55,000 bricks per day for the induced draft. The dimension of the other components of the kiln and the brick setting is explained keeping this mind.
The benefit of zig-zag eent Bhatta
1-In zig-zag eent Bhatta increase the quality of bricks