Process for preparing biofuel from biological waste

Abstract

The invention relates to a process for preparing biofuel from biological waste. The process comprises the following steps: squeezing water out of biological waste firstly, then classifying the biological waste into two classes and treating the two classes of biological waste at the same time, wherein the first class of sewage is used for producing biogas, heat generated through biogas combustion is used for drying, and the second class of biological waste blocks is cut,; conveying the cut biological waste into drying equipment for drying; processing the waste gas discharged from the drying equipment by primary cleaning equipment and secondary cleaning equipment and discharging when the standard is reached; pelleting dried biological waste into finished products in pelleting equipment. The process provided by the invention overcomes the defects of the processing process in the prior art that harmful gas pollutes the environment, power generation cost is high in the case of fuel addition, equipment investment is high, and the rate of return is low; and through the specific process design, the process for preparing biofuel is free from environment pollution, does not need additional heat consumption, and is low in production cost.

Description

Technical field [0001] The invention relates to a process for producing biofuel from biological waste. Background technique [0002] Human beings are developing, living standards are constantly improving, and various biological wastes are increasing day by day. The current treatment of various biological wastes includes landfilling, incineration, etc. The most scientific of which is directly burning waste for power generation. Both methods will bring secondary pollution. From the analysis of the method of directly burning biological waste to generate electricity, it is to burn biological waste to generate heat to generate electricity. Its technological process is to intensively ferment the biological waste, then mix in a small amount of coal or oil and burn together to generate heat. The defects of this technology process are: 1. Biological waste is humid, low calorific value, low burning rate, harmful gases produced during combustion and odor produced during fermentation will ...

AI Technical Summary

Problems solved by technology

The defects of this technical process are: 1. Biological waste is moist, has low calorific value, and low combustion rate. The harmful gas generated during the combustion process and the odor generated during the fermentation process will pollute the environment.

2. Because of the low calorific value, the cost of generating electricity after adding fuel is high

3. The equipment investment is large and the rate of return is low

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