1.Waste liquid types
The organic waste streams in waste stream burners are extremely diverse. Organic waste streams are divided into three categories according to their chemical composition.
① Halogen-free organic waste streams. The organic compounds in this waste stream contain only C, H, O and sometimes S. When the waste stream contains less water, it is combustible and can be used as fuel (such as waste of organic
②Halogen-containing organic waste liquids. The organic compounds in waste liquids include CC4, vinyl chloride, bromomethane, etc. The calorific value of the waste liquid depends on the content of halogens. During incineration treatment, the need for auxiliary fuel is determined according to its calorific value. After oxidation in the incinerator, the waste liquid will produce monomeric halogens or hydrogen halides (HF, HCl, HBr, etc.), which can be removed or recovered as needed.
③Containing high salinity organic degree liquid. Such waste streams containing high concentrations of inorganic or organic salts will produce molten salts after combustion, so refractory materials, selection of combustion temperature and determination of residence time will be the main considerations in the design, and since such waste streams usually have low calorific value, auxiliary fuels are needed to achieve complete combustion.
2.The incineration process
General organic waste collection incineration process includes pre-batch surface high temperature incineration, waste heat recovery and tail gas treatment and other stages.
Pre-treatment mainly includes the aisle into the collection, plantain hair according to shrinkage, adjust the viscosity, etc., the purpose of which is to provide optimal conditions for the subsequent incineration over the process. The nature of the hair liquid varies: For COD value is very different, organic waste liquid incineration treatment can be directly sent to the incinerator burner for incineration treatment, in the face of the calorific value is not very high waste high, calorific value is also very high organic waste liquid, organic waste liquid containing relatively high moisture, you can first steam the liquid, you can add auxiliary fuel to help waste liquid for incineration.
When the waste liquid does not contain harmful low boiling point organics, the method of direct concentration of high temperature flue gas can be considered, and then incineration can be carried out after concentration. However, the concentration method with indirect heating should be used for organic waste streams containing harmful low-boiling components.
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