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The forge is composed of several different parts. These are: Hearth - A place where the fire is built. It is usually shaped in such a fashion that there is a hole in the center that leads downward. Grate - Covers the hole in the bottom of the hearth and keeps the hot coals in place, allowing the ash or fire by- product to go downward. Tuyere - Is a pipe that is connected to the bottom of the hearth and the top of which is protected by the grate. The diameter of the pipe will determine the force by which the air is blown into the fire. Ash Door - At the bottom of the Tuyere is a door that will allow the removal of ash and debris that has collected. The chimney is composed of: Hood - The hood is the first place that the smoke comes into the chimney. A simple small extension off the chimney that provides an opening to the stack. It can be placed above or at the side of the hearth and needs to be close enough that the smoke will be drawn into it. Stack - The length of the stack determines how well the chimney draws air. The higher the stack the better the draw. Another aspect that must be taken into consideration is the width. If the size of the stack is not sufficient enough for the size of the fire then all the smoke wont be removed. Ash and Turbulence Chamber - Located at the bottom of the stack is an area that is called the Ash and Turbulence Chamber. There has to be enough space between the bottom of the stack and hood opening to allow air to flow in and a place for the ash to drop to. A vent in the lower back portion of the stack near the floor, allows for the removal of debris that has collected. This opening also helps in creating a draft in the chimney to draw the smoke upwards. There is a final component that hasnt been mentioned yet and that is the blower. The purpose of the blower is to introduce air into the fire, aiding in the combustion of the coal. There are several different forms of blowers including the bellows. |