Purifying method and apparatus of recycling waste liquid of organic solvent

Abstract

The invention relates to a purifying method and an apparatus of a recycling waste liquid of an organic solvent. The purifying method comprises spraying the recycling waste liquid onto a wall surface with a high temperature and then evaporating the recycling waste liquid. The purifying apparatus comprises a concentrator connected with a to-be-processed exhaust gas input pipe and a concentrated exhaust gas output tube to absorb the organic solvent in the to-be-processed exhaust gas and then condense and desorb; a condenser connected to a downstream end of the concentrated exhaust gas output tube, as well as a condensed recycling liquid outlet pipe and a desorbed gas circulating pipe; a liquid-liquid separator connected to a downstream end of the condensed recycling liquid outlet pipe to separate the condensed recycling liquid into the organic solvent and the recycling waste liquid; and a recycling waste output pipe connected to the liquid-liquid separator so as to spray the recycling waste liquid in the liquid-liquid separator onto a high-temperature wall. The method can conveniently and effectively treat and recover the recycling waste liquid, capture and neutralize sulphide and / or nitride during self-combustion discharge, and cool chimneys.

Description

Technical field [0001] The invention relates to a purification method and device for recovering waste liquid from organic solvents, in particular to a process of heating a desorption heat medium by burning heavy oil in a heat medium heating furnace. The recovered waste liquid separated from the liquid-liquid separator is sprayed on the chimney to evaporate the recovered waste liquid. Background technique [0002] Organic solvents widely used in life and production are easily volatile into gases at room temperature, so they are also called Volatile Organic Compounds (VOCs). Most organic solvents are toxic to the human body and must be purified; At present, in addition to incineration, the current treatment methods for organic solvents include figure 1 As shown, the exhaust gas to be treated is passed through a concentrator 10, and the organic solvent in the exhaust gas to be treated is adsorbed and desorbed by the concentrator 10, and then the desorbed organic solvent concentrated...

AI Technical Summary

Problems solved by technology

[0002] Organic solvents widely used in life and production are easy to volatilize into gases at room temperature, so they are also called Volatile Organic Compounds (VOCs), and most organic solvents are toxic to the human body and must be purified; Or, the current treatment methods for organic solvents, in addition to incineration, there are other figure 1 As shown, the waste gas to be treated is passed through a concentrator 10, and the organic solvent in the waste gas to be treated is absorbed by the concentrator 10 and then concentrated and desorbed, and then the desorbed organic solvent concentrated waste gas is passed through a condenser 20 , the organic solvent concentrated waste gas is condensed by the condenser 20, and the condensed recovery liquid is separated into an organic solvent and a recovery waste liquid through a liquid-liquid separator 30, and the recovered organic solvent can be purified and reused, while the recovery waste Although the liquid has met the discharge standard and can be discharged directly to the outside, but because it still has an odor, direct discharge to the outside will cause olfactory discomfort, but there is no suitable treatment method at present

Images