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Method for extracting bio-oil through normal-pressure continuous thermal pyrolysis of straws and equipment used in same

A thermal cracking and bio-oil technology, applied in the preparation of liquid hydrocarbon mixtures, biofuels, petroleum industry, etc., can solve the problems of increasing power consumption, increasing operating costs, hidden safety hazards, etc., so as to improve oil yield and reduce power consumption. and running costs, the effect of no noise

Inactive Publication Date: 2014-07-30
LIAOYANG DINGLI TRADING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The method of extracting bio-oil from straw includes drying, crushing, thermal cracking, gas-solid separation, condensation and collection of gaseous bio-oil, etc., among which the most widely used thermal cracking equipment is the fluidized bed cracker, which It is necessary to use carrier gas such as flue gas or nitrogen as the fluidization medium, which not only increases power consumption, but also increases operating costs, and there are certain safety hazards

Method used

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  • Method for extracting bio-oil through normal-pressure continuous thermal pyrolysis of straws and equipment used in same
  • Method for extracting bio-oil through normal-pressure continuous thermal pyrolysis of straws and equipment used in same
  • Method for extracting bio-oil through normal-pressure continuous thermal pyrolysis of straws and equipment used in same

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Experimental program
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Effect test

Embodiment Construction

[0018] 1. Dry and crush the straw in turn until the length does not exceed 2 cm;

[0019] 2. See Figure 6 , the crushed stalk is sent into the thermal cracking equipment 3 in operation through the screw feeder 15, and said thermal cracking equipment is (see figure 1 ), six screw feeders 31 are connected end to end (referring to the connection between the outlet of the previous screw feeder and the inlet of the next screw feeder), reciprocating arrangement from top to bottom, see image 3 and 4 , the electric heating tube 312 is evenly laid on the surface of each screw feeder pipe 311, and then the electric heating tube is wrapped on the surface of the steel pipe with a bandage 313 made of heat insulating material, and the upper part of each screw feeder tube cavity Set a pyrolysis gas pipeline 32, after the gas outlets of the six pyrolysis gas pipelines are connected in parallel, they are connected with the parallel pipe 4 and the condensation pipe in turn, and the rotating...

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Abstract

The invention provides a method for extracting bio-oil through normal-pressure continuous thermal pyrolysis of straws and equipment used in the same, solving the problem that carrier gases need to be used as fluidizing media to extract bio-oil from the straws at present, so that the power consumption is increased and certain potential safety hazards also exist. The method is characterized by drying and grinding the straws; carrying out thermal pyrolysis, wherein thermal pyrolysis equipment is formed by a plurality of screw feeders which are connected end to end and are arranged from top to bottom in a reciprocating manner, electrical heated tubes are laid on the surface of a pipeline of each screw feeder, and a pyrolysis gas pipeline is arranged at the upper part of a tube cavity of each screw feeder; condensing the generated pyrolysis gas, discharging oil and simultaneously discharging slag. The method and the equipment have the positive effects that the whole process is pressure-free, thus eliminating the potential safety hazards caused by pressure and simultaneously reducing the power consumption and operating cost caused by pressure; the whole process is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to a method for thermochemically treating straw, specifically a method for continuously pyrolyzing straw to extract bio-oil under normal pressure, and the preparation used in the method. Background technique [0002] The method of extracting bio-oil from straw includes drying, crushing, thermal cracking, gas-solid separation, condensation and collection of gaseous bio-oil, etc., among which thermal cracking equipment is the most widely used fluidized bed cracker. It is necessary to use carrier gas such as flue gas or nitrogen as the fluidization medium, which not only increases power consumption, but also increases operating costs, and there are certain safety hazards. Therefore, reducing system energy consumption, reducing operating costs, strengthening oil-gas separation, and oil yield have become the main research directions for extracting bio-oil from straw. Contents of the invention [0003] For this reason, the object of ...

Claims

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Application Information

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IPC IPC(8): C10G1/00C10B53/02
CPCY02E50/10
Inventor 栗荣生肖星
Owner LIAOYANG DINGLI TRADING
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