Medical garbage sorting recycling method under the condition of high pressure steam sterilization

Abstract

The invention relates to a medical garbage sorting recycling method under the condition of high pressure steam sterilization, comprising the following steps: (1) sorting collecting: sorting collecting the medical garbage with different sources and characteristics; (2) first crushing; (3) high pressure steam sterilizing; (4) separating: according to the specific weight and magnetism of materials, separating the medical garbage into four types by a mechanical way: lighter materials, heavier materials, magnetic materials and residual materials; (5) secondary crushing: crushing all the materials to ensure the particle size below 2mm; (6) secondary separating: secondary separating the materials after secondary crushing to separate the materials which have different characteristics from other materials and merging the separated materials into corresponding special types; (7) burning and recycling. The invention facilitates recycling of physical resources and reduces energy consumption and air pollution.

Description

technical field [0001] The invention relates to a method for sorting and recycling medical waste under high-pressure steam sterilization, which is mainly used for the recovery and final treatment of medical waste and other infectious and harmful waste. Background technique [0002] For infectious solid wastes such as medical waste, people have adopted a variety of methods to deal with them. The main technical direction is to incinerate, and the microorganisms will be completely decomposed by incineration, so that they are no longer infectious. For example, China No. 200510048910.8 The patent application discloses a circulating fluidized bed incineration method for medical waste. Limestone is used as the inert bed material of the circulating fluidized bed. Calcium oxide generated by burning limestone at high temperature is combined with hypochlorous acid in medical waste and pyrolysis incineration. The neutralization reaction of acid gases such as hydrogen chloride produced i...

AI Technical Summary

Problems solved by technology

This method can effectively solve the infectious problem of medical waste, but due to the use of incineration, it also brings problems such as fuel consumption, loss of recyclable materials, and air pollution. Garbage treatment process, the process includes the following steps: the first step, the medical waste is sent to the comprehensive processor through the garbage conveying device, and sealed; the second step is to deliver steam with a temperature of The pressure rises to 4-8 atmospheres, and the holding time is 20-50 minutes; the third step is to open the garbage discharge device at the lower end of the comprehensive processor, so that the medical waste enters the collector in a closed manner, and the steam is discharged from its chimney; the fourth step, The medical waste in the collector is sent to the sorting machine by the conveying mechanism; the fifth step is to sort out the metals and batteries in the medical waste; the sixth step is to transport the sorted medical waste to the shredder for crushing; Seven steps, transport the crushed garbage to the disposal site

Since this method firstly performs high-temperature steam sterilization, and then sorts to a certain extent, metals that can be recycled are recovered and incineration is not suitable for batteries, which improves the combustion characteristics of materials to a certain extent, but the final treatment is still through Incineration treatment, problems caused by incineration still exist

[0003] However, from the perspective of the composition of medical waste, except for a small amount of materials that need special treatment, the composition of most of the materials is similar to that of general domestic waste, and some of the materials of medical waste have good recycling value, such as disposable Non-toxic plastic products and fiber products. The key reason why these medical wastes cannot be recycled like domestic waste is that they already and may carry pathogenic and dangerous microorganisms. If they are collected and recycled like existing domestic waste , will bring great danger to the environment and practitioners

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