A system and method for pretreatment of domestic waste pyrolysis condensate wastewater

Abstract

The invention relates to the field of wastewater treatment and especially relates to a system and a method of pretreatment of household garbage pyrolysis condensation wastewater. The treatment system includes: a circulating adsorption oxidizing column having a water inlet, a first water outlet, a second water outlet, a water distribution packing layer, and a pyrolysis charcoal packing layer; an oil separation and precipitation system; a transporting apparatus used for transporting the pyrolysis condensation wastewater to the circulating adsorption oxidizing column; an oxidant addition system for adding an oxidant; a pH regulation section for regulating pH value; an ammonia stripping tower for performing blow-stripping treatment. The system and the method fully consider the characters that the pyrolysis condensation wastewater is acidic and is high in temperature, wherein the pyrolysis condensation wastewater is treated by means of pyrolysis charcoal, thereby achieving wastewater treatment by waste solid. In addition, saturated pyrolysis charcoal is fed back to the furnace for circulating pyrolysis, thereby being free of secondary pollution, not increasing the total soluble solid content in the wastewater and not generating sludge. The system and the method are low in cost and are easy to control, and have good effect of increasing biodegradability.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a pretreatment system and method for domestic waste pyrolysis condensation waste water. Background technique [0002] During the pyrolysis gas condensation collection stage in the pyrolysis process of domestic waste RDF, the moisture contained in the material and the reaction water generated by pyrolysis will condense into the pyrolysis liquid along with the middle and high boiling point components in the pyrolysis gas, forming oil and water mixture; after the pyrolysis oil is obtained through oil-water separation, the rest is the pyrolysis condensate wastewater that needs to be disposed of. [0003] Since the pyrolysis condensate wastewater mainly comes from the water contained in domestic waste RDF entering the pyrolysis furnace and the reaction water produced during the pyrolysis process, and pyrolysis is a decomposition reaction under anaerobic conditions, so the pyrolysi...

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Problems solved by technology

[0005] It can be seen from this that if the domestic waste RDF pyrolysis condensate wastewater is not treated, it will have an extremely bad impact on the environment, or it will affect the normal operation of subsequent conventional biochemical treatment steps.

However, there is currently no effective method for the treatment of the above-mentioned pyrolysis condensate wastewater

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