A method and system for treating waste kitchen waste oil

Abstract

The invention discloses a processing method of kitchen waste grease, comprising the following steps: a step of filtering with a sieve: filtering the recycled kitchen waste grease with the sieve at the temperature of 40-50 DEG C to preliminarily remove impurities; a step of crushing and separating: putting the filtered kitchen waste grease into a pipeline crusher to crush the residual impurities and soft solid materials in the raw materials, then carrying out centrifugation with a centrifuge to preliminarily separate grease raw material from water and residual impurities; and a step of refine refining grease: putting the grease raw material obtained by centrifugation into an oil-water separation device for oil-water separation to separate out purified grease. The invention also discloses aprocessing system of kitchen waste grease. According to the invention, the industrial grease products with high purity and high yield can be produced with low energy consumption, easiness and feasibility.

Description

technical field [0001] The invention relates to the field of waste energy regeneration, in particular to a method and system for treating kitchen waste and waste oil. Background technique [0002] Kitchen waste waste oil refers to various oils and fats that enter the sewer with water during the process of washing tableware in families, restaurants, hotels, etc. China is a country with a large population, and the kitchen waste and waste oil produced in large and medium-sized cities reaches 2-3 million tons every year. Taking Lanzhou City, Gansu Province as an example, the amount of kitchen waste generated is 250 tons per day. If the waste oil content is 5%, the kitchen waste waste oil is as high as 4,600 tons per year. If so much kitchen waste and waste oil is not strictly managed, it will cause many adverse effects on food safety and environmental sanitation. In particular, the peroxide value, acid value, moisture, and bacteria of kitchen waste oils and fats seriously exce...

AI Technical Summary

Problems solved by technology

In addition, the traditional technology and equipment pollute the environment a lot. When the traditional method is processed, a large amount of domestic water is consumed. Each ton of product processed requires about 1.5 tons of domestic water.

Moreover, sewage is difficult to treat, and it is easy to cause eutrophication of the water body if it is discharged into natural water sources; it is easy to cause salinization of the land if it is discharged into the land

The black smoke generated by burning firewood and coal during processing is directly discharged into the atmosphere, which makes the surrounding environment of the factory area harsh. The odor generated when kitchen waste and waste oil is heated stays around the factory area for a long time, which is easy to cause the breeding and spread of diseases and molds

The properties of the processed finished products are unstable, with high moisture content and high impurities. They cannot be directly used as raw materials for industrial oils and fats, and their utilization is small. Generally, they are only used in the production of low-grade paints and plastics. If they are used as raw materials for fatty acids and oleic acid, etc. Must go through pretreatment processes such as dehydration and impurity removal

[0004] It can be seen from the above that the process flow of kitchen waste waste oil treatment in the prior art is generally: heating→precipitation→filling. The process is simple, the processing equipment is very simple and rough, the energy consumption is high, and the output and purity of the finished product are very low.

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