Straw carbonization and separation technique and separating device used thereby

Abstract

The invention discloses a straw carbonization and separation technique and a separating device used thereby to realize the carbonization of the straw and extract various useful substances, such as wood tar oil, wood vinegar, mixed combustible gas and the like in a carbonization process. The technique comprises the following steps of: processing the straw into segmented straw, sending the segmented straw into a furnace kiln and igniting to heat the segmented straw at a high temperature to produce smoke gas and placing the treated straw into a sharp quenching multi-pipe separating device to extract wood tar oil; extracting mixture of wood tar oil and wood vinegar liquid in a multi-layer staggered separating device; extracting wood vinegar liquid in an internal rotation centrifugal separating device; and sending remaining gas into a purification tower to purify and controlling the temperature to be between 60 and 80 DEG C. The invention has the advantages that: a new straw carbonization and separation technique is developed and the extraction of various useful substances, such as wood tar oil, wood vinegar and mixed combustible gas, is realized when bio-carbon is produced.

Description

technical field [0001] The invention relates to a straw carbonization and separation process, and is an innovative process method for carbonizing straw and other materials to form bio-coal. Background technique [0002] About 170 billion tons of biomass are produced through photosynthesis on the earth every year, and the energy contained in it is roughly equivalent to 10 times the world's main fuel consumption, while the seat energy utilization is less than 1% of the total. my country is a large agricultural country, and the annual crop straw volume is about 700 million tons, which is equivalent to 350 million tons of carbon coal. Straw power generation is a project that uses lignin-containing crop straw, agricultural and forestry waste, etc. as fuel to generate electricity. Using straw to generate electricity can directly avoid air pollution caused by direct burning of crop straw in the field. In the past, except for the farmers' own use, the remaining crop straws were ma...

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Problems solved by technology

In recent years, there have been many studies on straw gasification, but now rural farmers use less and less dry food for their own use, and the amount of straw used for feed is very small, and straw papermaking has caused great pollution to the ecological environment. Paper mills have been closed, and large paper mills no longer use straw as raw material. Returning to the field increases the cost of farmers, and the effect of returning to the field is not good. The research on the production of biogas and gasification from straw has not yet been commercially applied.

In this way, a large amount of waste straw had to be burned by farmers in the field, which seriously polluted the environment and caused a series of problems such as traffic and fire.

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