Treatment device for pretreatment of liquid hazardous waste and treatment method thereof

Abstract

The invention relates to a treatment device for pretreatment of liquid hazardous wastes and a treatment method thereof. The device comprises an exothermic reaction kettle, an endothermic reaction kettle, a waste liquid neutralizing system, an activated carbon feeding device and a liquid discharging system, jackets are arranged outside the exothermic reaction kettle and the endothermic reaction kettle; the waste liquid neutralizing system comprises an acid liquid adding device and an alkali liquid adding device; the liquid discharging system comprises a supernatant receiving tank, a vacuum pump, a supernatant receiving tank and a waste liquid pump; according to the invention, solid-liquid separation is carried out on the waste liquid containing more solids; the waste liquid with higher heavy metal content is subjected to heavy metal removal treatment; according to the method, the character of the waste liquid is improved, the viscosity of the waste liquid is reduced, the PH value of thewaste liquid is neutralized, the acid waste liquid, the alkaline waste liquid, the solid-containing waste liquid and the heavy metal-containing waste liquid can be widely pretreated and then fed intoa downstream treatment procedure, downstream incineration and physicochemical procedures run smoothly, and the continuous running time of an incineration and physicochemical treatment system is prolonged.

Description

technical field [0001] The invention relates to the technical field of hazardous waste incineration pretreatment, in particular to a treatment device and a treatment method for liquid hazardous waste pretreatment. Background technique [0002] With the rapid growth of my country's economy, the growth of various hazardous wastes is also accelerating, which brings huge pollution risks to environmental safety. At present, in the industrial production of printing and dyeing, papermaking, medicine, pesticides, and chemicals, a large amount of organic Or inorganic waste liquid, the waste liquid has a variety of types, various properties, and complex components, which brings great difficulties to the treatment of the comprehensive hazardous waste disposal center. [0003] At present, the waste liquid treatment methods commonly used in the comprehensive hazardous waste disposal center usually include incineration, physical chemical and other methods, but because the waste liquid cont...

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Problems solved by technology

[0002] With the rapid growth of my country's economy, the growth of various hazardous wastes is also accelerating, which brings huge pollution risks to environmental safety. At present, in the industrial production of printing and dyeing, papermaking, medicine, pesticides, and chemicals, a large amount of organic Or inorganic waste liquid, the waste liquid has a variety of types, various properties, and complex components, which brings great difficulties to the treatment of the comprehensive hazardous waste disposal center

[0003] At present, the waste liquid treatment methods commonly used in the comprehensive hazardous waste disposal center usually include incineration, physical chemical and other methods, but because the waste liquid contains various impurities, the waste liquid is generally not pretreated in the comprehensive hazardous waste disposal center, and directly enters the Physicochemical and incineration systems deal with waste liquids, and there are often phenomena such as blocked pipes, delivery pumps and waste liquid spray guns, which cause the system to fail to operate continuously

Since the comprehensive hazardous waste disposal center faces a variety of customers, and there are many types of liquid hazardous waste, the output of many types of hazardous liquid waste is not large, so from an economic point of view, it is not suitable to provide a separate set for a certain Waste liquid treatment device

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