Method for recovering and recycling chimney condensed wastewater

Abstract

The invention relates to the technical field of chimney condensed wastewater recovery and recycling and discloses a method for recovering and recycling chimney condensed wastewater. The method comprises 1) discharging all coke oven chimney condensed wastewater into a standing pool through a pipe, carrying out standing for 30 to 60 minutes, and discharging the supernatant into a filter tank through a pipe, and 2) adding an inorganic precipitant hydroxide into the liquid in the step (1), removing large particle impurities through grids, carrying out secondary filtration through a filter, and feeding the liquid into an adjustment tank. The method can discharge all chimney condensed wastewater into a coke quenching water tank for wet quenched coke recycling, realize zero discharge of wastewater, protect water quality in the external environment and continuously save valuable water resources.

Description

technical field [0001] The invention relates to the technical field of recycling condensed waste water from chimneys, in particular to a method for recycling condensed waste water from chimneys. Background technique [0002] The main function of the chimney is to pull out the fire and smoke, drain the smoke and improve the combustion conditions. Chimney effect: vertical wells such as stairwells, air exhaust ducts, air supply ducts, flue exhaust ducts, elevator shafts and pipe shafts are generally installed in high-rise buildings. When the indoor temperature is higher than the outdoor temperature, the indoor hot air is caused by If the density is low, it rises naturally along these vertical passages, seeps out from the high-rise part through the gaps in doors and windows and various holes, and the outdoor cold air is infiltrated and supplemented by the low-level due to the high density, which forms the chimney effect. [0003] In the coking workshop, the COD, nitrogen oxides...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for recycling condensed waste water from chimneys, which has the advantages of zero discharge of waste water, which not only protects the water quality of the external environment, but also continuously saves precious water resources, etc. It solves the problem that the COD, nitrogen oxide (NOx) and PH value of the chimney condensate in the coking workshop exceed the standard in the water quality monitoring. If the waste water is directly pumped into the external environment, it will cause serious pollution to the water quality in the external environment, which is not conducive to Environmental protection and serious waste of water resources

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