It covers what you need to do if you burn waste in the open air or within a waste burning unit. It provides guidance on the permits, licences and exemptions that you require to burn waste and suggests alternatives to burning waste.
Free monthly email newsletter with environmental updates for Northern Ireland and Scotland. NIEA - Apply online. SEPA - Application forms. Frequently asked questions Contact us. Toggle navigation Menu. Incineration has especially strong benefits for the treatment of specific types of waste, such as clinical wastes and hazardous wastes where pathogens and toxins can be destroyed by extremely high temperatures.
A typical hazardous waste incinerator consists of a rotary kiln, an afterburner and an air pollution control system. Both solid and liquid wastes are introduced into the rotary kiln, in which the temperature is usually higher than 1, degrees Fahrenheit. This extremely high temperature is maintained through the use of the heat content of liquid wastes or the introduction of supplemental fuels, such as natural gas, into the chamber.
The kiln rotates slowly to ensure that the solid wastes are exposed on all sides to the high temperature in the kiln. A large fan draws the excess air into the system to increase its combustion efficiency. In the incineration process, hazardous waste is fed semi-continuously by a ram feeder. The ram feeder can be automatically or manually cycled through a refractory lined charging into the combustion chamber. The primary combustion chamber consists of the rotary drum and a 20 MMBtu burner which is controlled and modulated by a temperature controller and temperature element placed in the ductwork between the primary and secondary combustion chambers.
The ash from the primary combustion unit is discharged through a refractory-lined valve placed in the discharge bridging. The vapor from the primary combustion chamber is pulled through refractory-lined ductwork to a secondary combustion chamber, where the vapor is oxidized at temperatures up to 2, degrees Fahrenheit for at least two seconds. The vapor from the secondary combustion chamber is pulled through a pre-cooler, where the temperature is reduced to approximately 1, degrees Fahrenheit.
From the pre-cooler, the vapor is pulled through a plume eliminator, which also acts as a heat exchanger. Boilers typically combust waste for energy recovery, while industrial furnaces burn waste for both energy and material recovery. A boiler is defined as an enclosed device that uses controlled flame combustion to recover and export energy in the form of steam, heated fluid, or heated gases.
An industrial furnace is a unit that is an integral part of a manufacturing process and uses thermal treatment to recover materials or energy. Skip to Main Content. Go to TN. Print This Page.
0コメント