Industrial waste salt resource treatment system and method

Abstract

The invention discloses an industrial waste salt resource treatment system and method. The system comprises a pretreatment module, a drying module, a microwave thermal analysis module and a refining module which are connected in sequence, wherein a microwave thermal desorption reaction chamber is defined by a thermal insulation shell of the microwave thermal desorption module, and the outer wall of the thermal insulation shell is connected with a microwave magnetron through a waveguide; the material conveyor is arranged in the heat preservation shell and used for providing a material bearing and conveying working face. According to the method disclosed by the invention, microwave thermal desorption is taken as a core, and dissolution precipitation and inorganic substance adsorption precipitation are combined, so that the removal rate of organic matters in the waste salt is high, and TOC (Total Organic Carbon) in crystallized salt is reduced to below 5mg/L and meets the industrial salt standard; harmless treatment and resource treatment of the waste salt are achieved, and waste is turned into wealth.

Description

technical field [0001] The invention belongs to the technical field of industrial waste salt disposal, and in particular relates to a resource disposal system and method for industrial waste salt. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Industrial waste salt (hereinafter referred to as "waste salt") is mainly produced in industrial production processes such as pesticide intermediates, drug synthesis, printing and dyeing, solid-liquid separation, solution concentration crystallization, and sewage treatment. It has various types, complex components, and numerous sources. Disposal costs are high and environmental hazards are high. With the rapid development of my country's chemical industry and related industries, industrial waste salt is increasing year by year, and the annual output has exceeded 20 million tons. The stacking and effective d...

AI Technical Summary

Problems solved by technology

Among them, the waste salt landfill must enter the rigid landfill plant, which occupies a large area and the cost of landfill is high, which is difficult for enterprises to bear

Incineration is usually due to its low calorific value and mainly inorganic compounds, the disposal effect is not good, and the risk of corrosion of the incinerator furnace and the risk of dioxins are also important reasons that restrict its large-scale application

Although high-temperature melting treatment can completely remove organic matter in waste salt at 800-1200°C, it is easy to cause problems such as equipment ringing and pipeline agglomeration. At the same time, flue gas entrainment can increase the investment cost of secondary purification, which is not conducive to long-term cycle Discharge

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