A harmless resource treatment method for medical waste

Abstract

The invention discloses a harmless recycling treatment method of medical waste, comprising the following steps: (1) mixing the medical waste with calcium oxide, drying at 120-140°C, and crushing to 100-200 mesh; 2) The pulverized material in step 1, corroded calcined zeolite, iron pentacarbonyl, methylphosphoramide, cement clinker, cementing material, mixed uniformly, shaped and solidified; the corroded calcined zeolite is soaked in concentrated hydrochloric acid for 10- After 20 minutes, it is obtained by calcining at 300-400°C and grinding; (3) calcining the cured material obtained in step (2) at a high temperature of 600-800°C. The invention adopts corrosion-calcined zeolite, iron pentacarbonyl and methylphosphoramide as reinforcement system, synergistically improving the compressive strength and crack resistance of the product.

Description

Technical field [0001] The present invention belongs to the field of waste utilization, and more particularly to the harmless resource treatment method of medical waste. Background technique [0002] Medical waste refers to waste from hospitals and other medical institutions, including susceptible waste, pathological waste, pharmaceutical waste, heavy metal garbage, patient living garbage and sharp garbage and radioactive garbage (where sharp Due to the high recovery value of the recycling, most of the radioactive excretion of the patients in radioactive waste is alternatively treated), there is a large number of complex infectious viruses, pathogen, chemical pollutants and radioactive harmful substances. High-hazardous waste, high moisture content (general outpatient and internal waste content of about 30%, 60-75% of surgery waste content). Furthermore, the organics in the medical waste are easy to raw mosquitoes, and it is easy to decompose to produce toxic and harmful malodous...

AI Technical Summary

Problems solved by technology

Furthermore, the organic matter in medical waste is prone to breeding flies and mosquitoes, and is easy to decay and decompose to produce toxic and harmful odorous gases. It is easy to float in the air and pollute the atmospheric environment, which not only easily causes cross-infection in the hospital, but also endangers the social environment, and also leads to environmental biological pollution during the storage, sorting, and transfer of medical waste

In terms of composition, the dry basis of medical waste generally accounts for about 70% of organic matter and about 30% of inorganic matter. When incinerated in a professional incinerator with a low temperature in the furnace (below 950°C), the burnout rate is generally low, and a large amount of toxic and harmful gases are difficult to handle.

[0003] Chinese patent application document "Harmless Recycling Treatment Method of Medical Waste (Publication No.: CN106001049B)" discloses a harmless recycling treatment method of medical waste, including the following steps: (1) preparing safe solid Fuel: Utilize oxidative nitrating agent and cementing material to convert medical waste into safe solid fuel, according to the mass percentage, the ratio of medical waste 60-94.5%: oxidizing nitrating agent 0.5-10%: cementing material 5-39.5% is proportioned, Mix evenly, shape and solidify; (2) resource utilization: add safe solid fuel from the kiln tail of the dry rotary kiln into the smoke chamber, and burn it out in the bottom temperature field of 1050°C±50°C; or add it from the kiln head In the rotary kiln, the clinker at 1300-1450°C and the flame at 1650-2000°C at the bottom of the rotary kiln are quickly burned; or directly added to the coal-fired boiler as an alternative fuel and burned out, harmless resource utilization of medical waste However, there is a problem that a large amount of toxic and harmful gases will be produced as a fuel, and only the inorganic substances in it are used, and other organic polymers are not fully utilized.