It is a combustion unit with conveyor grate mounted under the u-tube primary combustion chamber.
Rotary grill; It is made of heat-resistant special alloy casting material. Chain links; It is designed to create thin air outlets between them that can provide combustion on the entire surface. The combustion capacity can be kept at the desired level by supplying the required amount of combustion air to the grill from below through numerous air ducts and adjustment valves.
The most efficient coal that the rotary grill will burn is the volatile matter amount of minimum 35%, 3 - 10 mm. They are coals as large as a grain of rice.
From the moment the coal is poured into the grate from the service bunker, it moves into the furnace with the rotation speed of the grate. The coal layer laid on the grill is adjusted by a manual mechanism, and the quality of the coal, burning speed, etc. It is adjusted depending on factors such as. When it first enters the furnace, under the influence of radiation heat, the coal first begins to release its moisture, gassify as the temperature increases, and release volatile-flammable hydrocarbons, and completes the combustion of fixed carbon in the further parts of the grate.
All components of the charcoal must burn to the end of the grill. The ash of the coal that has completed its combustion is discharged from the end of the grill with a suitable ash removal system. After pouring the coal from the last point on the grill, as it returns from under the combustion zone, it cools down because it is not exposed to combustion, and as a result, thermal deformation of the grill does not occur much because it is not exposed to high temperatures.
The burning speed will vary depending on the structure of the coal. The rotation speed of the grill is adjusted by the inverter and the speed is selected to best suit the burning of the coal at hand. The speed of the grill changes depending on the steam pressure within the selected speed.
Coal; Immediately after starting to be laid on the rotary grill, the coal is spread evenly over the entire grill surface and in the desired thickness through the adjustable system located behind the coal loading bunker. It starts to burn at the entrance of the boiler and continues homogeneously until the end of the grill.
There are primary air channels at the bottom of the grill, where the flow rate can be adjusted with separate valves. The ability to control the air ducts separately allows zoning the combustion parts of the grill separately.
Since the combustion is completely completed, the remaining amount of slag is very small and this is poured into the slag trough. The ash of the coal that has completed its combustion is poured into the wet ash removal system and from there it is discharged from the boiler via a pallet scraper.
Thanks to the special design of the grill, unburned coals spilled under the grill accumulate in the chamber at the front and are automatically removed from there.
The conveyor grid and boiler placed on the flat concrete floor minimizes the customer's construction cost, which is one of its most important advantages.
The coal to be burned must be of quality in accordance with the regulations defined by the Ministry of Environment and Forestry. Coal with low ash, moisture and sulfur content and high calories should be preferred.
Combustion air and secondary air are supplied in a controlled manner from both sides of the grill, ensuring that the grill is cooled and combustion occurs on the entire grill surface.