Solidifying and stabilizing method for toxicity containing organic matter dangerous waste matter

Abstract

The invention discloses a solidification and stabilization method for a hazardous waste containing toxic organic compounds, which belongs to the hazardous waste treatment technical field of environment protection. According to a dry weight ratio, 30 to 60 percent of the hazardous waste containing toxic organic compounds, 0.5 to 10 percent of an additive, 30 to 60 percent of inorganic cementing agent and curing agent are added into an agitator and are stirred by adding water, meanwhile, a gas internal circulation device is started, the gas in the agitator is adsorbed and purified by a gas adsorbing and purifying device, and then part of the gas is fed back into the agitator; after being evenly mixed and stirred materials are discharged, solidified and fed into a maintenance house, and the solidification and stabilization of the hazardous waste containing toxic organic compounds is finished. The additive comprises an adsorbent with adsorbing effect and a structural modifier which can improve the structural performance of a product, such as activated carbon, water glass, calcium chloride, etc. The inorganic cementing agent and curing agent refers to hydraulicity cementing material. The solidification rate of the invention can reach more than 90 percent; and gas circulation can reduce polluted gas discharging, thus being capable of effectively reducing the occurrence of secondary pollution.

Description

technical field [0001] The invention relates to a solidification and stabilization treatment method for hazardous waste containing toxic organic substances, and belongs to the technical field of hazardous waste treatment for environmental protection. Background technique [0002] Solidification and stabilization is an important link in the treatment and disposal of hazardous waste. Its purpose is to limit or reduce the migration and release of polluting components in waste to the environment through various physical and chemical effects, so as to facilitate waste transportation, utilization and final disposal. At present, the solidification and stabilization technology for hazardous waste containing heavy metals is relatively mature, but the solidification and stabilization technology for hazardous waste containing toxic organic substances is still a weak link. Compared with heavy metals, there are many kinds of toxic organic substances, their physical and chemical character...

AI Technical Summary

Problems solved by technology

The current research results show that: the use of inorganic binders such as cement or lime alone cannot fully and effectively immobilize organic matter; organic matter interferes with the cementation process of inorganic binders; selection and use of appropriate additives can achieve effective treatment of organic matter

However, whether a high immobilization rate of toxic organic substances can be achieved is the bottleneck of the engineering application of this technology, and it is also the reason why this technology is currently being questioned in the treatment of hazardous waste containing toxic organic substances

At the same time, during the solidification and stabilization process of hazardous waste containing toxic organic substances, the problem of toxic organic substances (especially volatile toxic organic substances) volatilizing into the atmosphere and causing secondary pollution has not been properly resolved.

Images