Liquid injection incinerators are popularly used system that utilizes high pressure to prepare liquid wastes for incineration by breaking them up into tiny droplets to allow easier combustion. High tempereature is produced by this incinerators that are used for an effective treatment for wastes containing chlorinated hydrocarbons and sulfur compounds. In this incineration process, waste is pumped and sprayed into the combustion chamber.

Characteristics:
Liquid injection incinerators have following characterstics:

• Wastes are atomized into small droplets to allow for the greatest possible mixing with air.
  
  
• Operates at 1200-3000 F.
  
  
• The liquid injection incinerators can completely combust noncombustibles like contaminated water, along with organic combustible material.
  
  
• It is available in both horizontal and vertical configuration.

Principle
A liquid injection incinerator consists of a waste burner feed system, an auxiliary fuel system, system of an air supply, and a combustion chamber.

Liquid wastes are fed into the combustion chamber through waste burner nozzles. These nozzles atomized the waste and mixed it with air that ignited and burned in the combustion chamber. The operating temperature of the combustion chamber ranged from 1,300°F to 3,000°F.

A supplemental fuel, such as fuel oil or natural gas, may be pumped from a storage tank into the combustion chamber to augment the ignition potential of the waste mix, if the energy content of the waste is not high enough to maintain adequate ignition and incineration temperatures. There is a fan that provides air necessary for combustion.

Remember Impaction or Impingement of flames on the wall of the combustion chamber should not be allowed as it can lead to corrosion of the refractory material and loss of heat. Due to this location of the burner should be an important design criterion. Sometimes oxygenenhanced burners can also be used by liquid injection incinerators

Features
Following are the features of liquid injecdtion incinerators:

• It consist of flowmeter to feed waste to the incinerators.
• The combustion chamber is lined with refractory materials.
• The incinerators can be oriented both horizontally and vertically.
• It consist of powerful burner nozzle that is used for atomization of aqueous and non aqueous wastes.
• Easy to operate and install.