The role of roller kiln kiln flaps and firewalls
author: Archie
2025-04-22
The role of kiln flaps and firewalls
A firestop on the kiln floor serves essentially the same purpose as a firewall. The firestop is responsible for controlling the upper half of the kiln, and is generally made of high-temperature resistant rigid ceramic fibre boards, which can be adjusted for height on the outside of the kiln roof. The firewall is responsible for controlling the lower half of the kiln, and is generally constructed of refractory bricks in a relatively fixed height position.
1, up and down the role of infusion
The hot gas in the kiln is affected by the geometric pressure head effect, there is a tendency to move upward from the bottom.
Firestop and firewall through its gap to adjust the distribution of gas flow up and down movement, in order to balance the heat effect of the product in the firing process.
The hot gas in the kiln is affected by the geometric pressure head effect, there is a tendency to move upward from the bottom.
Firestop and firewall through its gap to adjust the distribution of gas flow up and down movement, in order to balance the heat effect of the product in the firing process.
2、Horizontal inflow effect
The gas in the kiln tunnel is subject to the action of the main fan at the kiln head, and moves to the kiln head from the horizontal direction.
Close to the kiln wall on both sides of the gas flow rate is low, especially the preheat band is laminar flow state, affecting the uniform heating of the product in the horizontal direction.
The firestop and firewall adjust the distribution of the horizontal movement of the gas flow by their shapes to improve the heat uniformity of the product.
The gas in the kiln tunnel is subject to the action of the main fan at the kiln head, and moves to the kiln head from the horizontal direction.
Close to the kiln wall on both sides of the gas flow rate is low, especially the preheat band is laminar flow state, affecting the uniform heating of the product in the horizontal direction.
The firestop and firewall adjust the distribution of the horizontal movement of the gas flow by their shapes to improve the heat uniformity of the product.
3, adjust the role of the heating curve
The temperature rise curve of the roller kiln depends on the physical and chemical changes in the product firing process, specification size and firing cycle.
The setting of firestop and firewall can achieve a rapid rise in temperature before the position where a sharp rise in temperature is required to meet the process requirements.
The temperature rise curve of the roller kiln depends on the physical and chemical changes in the product firing process, specification size and firing cycle.
The setting of firestop and firewall can achieve a rapid rise in temperature before the position where a sharp rise in temperature is required to meet the process requirements.
4、Interceptor role
Under normal circumstances, the heat preservation belt should be in a slightly positive or negative pressure state, and the rapid cooling belt should be in a larger positive pressure state.
In production, due to the main fan and extractor fan to adjust the balance may appear to keep the temperature of the belt airflow to the direction of the movement of the sharp cold belt trend, at this time the fire stopping board and firewall play a key role in safeguarding.
Under normal circumstances, the heat preservation belt should be in a slightly positive or negative pressure state, and the rapid cooling belt should be in a larger positive pressure state.
In production, due to the main fan and extractor fan to adjust the balance may appear to keep the temperature of the belt airflow to the direction of the movement of the sharp cold belt trend, at this time the fire stopping board and firewall play a key role in safeguarding.
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