Resourceful treatment method for hazardous waste in pharmaceutical industry

Abstract

The invention discloses a resourceful treatment method for hazardous waste in the pharmaceutical industry. The resourceful treatment method comprises the following steps that (1) the hazardous waste in the pharmaceutical industry is fed into a vacuum drying machine to be dried; (2) condensing the vaporized material through a condenser to obtain a mixed solvent; (3) separating and refining the mixed solvent to obtain a regenerated solvent; (4) crushing the dried residues, mixing with a catalyst, and feeding into a low-temperature cracking furnace for catalytic cracking; and (5) condensing the cracking gas through a condenser, and fractionating to obtain fuel oil. According to the method, the residual organic solvent in the hazardous waste in the pharmaceutical industry is deeply recovered, macromolecular organic matters are further cracked to manufacture fuel oil, the hazardous waste in the pharmaceutical industry is recycled, and meanwhile, the emission of the hazardous waste in the pharmaceutical industry is reduced.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment, and in particular relates to a resource treatment method for hazardous waste in the pharmaceutical industry. Background technique [0002] Our country attaches great importance to energy conservation and environmental protection, and the requirements for the treatment of solid waste, especially hazardous waste, are getting higher and higher. The pharmaceutical industry is an industry that produces a large amount of hazardous waste, mainly including: waste organic solvents, fine distillation still residues, centrifuge mother liquor, filter residues, etc. [0003] It is relatively easy to realize recycling of waste organic solvents through conventional processes such as distillation, rectification, and extraction. [0004] For the distillation still residue and centrifuged mother liquor, due to the complex composition, in addition to a part of the organic solvent, it usually also...

AI Technical Summary

Problems solved by technology

[0008] (3) Chlorine-containing organic substances such as methylene chloride will produce HCl during incineration, which will not only cause acid corrosion to equipment, but also increase the pressure of tail gas deacidification and increase the amount of fly ash produced;

[0009] (4) Hazardous waste containing organic nitrogen such as acetonitrile and DMF will produce NOx during incineration, which will increase the pressure of subsequent denitrification and increase the risk of emission;

[0010] (5) The organic solvent itself is an important chemical raw material, and direct incineration is also a great waste of resources

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