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System and method for pyrolyzing biomass and liquefied residue

A technology for liquefying residues and biomass, applied in the chemical industry, can solve the problems of easy generation of dust, low specific gravity of biomass, high dust content of pyrolysis oil and gas, and achieve the effect of reducing raw material costs and production energy consumption

Inactive Publication Date: 2017-05-17
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific gravity of biomass is small, and dust is easily generated during the pyrolysis process, resulting in excessive dust content in pyrolysis oil and gas

Method used

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  • System and method for pyrolyzing biomass and liquefied residue
  • System and method for pyrolyzing biomass and liquefied residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Using the system of the present invention, the agricultural waste with a particle size of less than 5mm and the liquefied residue at 290°C sent from the liquefied residue dedusting unit are mixed and stirred in a kneader, and the mass ratio of the biomass to the liquefied residue is 1 :0.5, and then pressed into shape by a briquetting machine, and sent into the non-heat-carrier regenerative rotary bed through a screw conveyor, evenly distributed on the material plate of the preheating furnace and rotated from the inlet to the outlet in turn, and in the process of rotation Heating in the radiant tube, pyrolysis occurs, and pyrolysis oil gas and mixed semi-coke are produced; among them, the temperature of the feed inlet is relatively low, which is 400-450°C, and the pyrolysis temperature of the uniform temperature field is 550-600°C; the pyrolysis The generated pyrolysis oil and gas are collected from each pyrolysis gas outlet and then merged, and directly transported to t...

Embodiment 2

[0066] This embodiment is the same as the system used in the above-mentioned embodiment 1, but the process conditions are different, as described below. The agricultural waste with a particle size of less than 5mm and the liquefied residue at 260°C sent by the liquefied residue dedusting unit are mixed and stirred in a kneader. The mass ratio of the biomass to the liquefied residue is 1:0.2, and then pressed The ball machine is pressed and formed, and sent into the non-heat carrier regenerative rotary bed through the screw conveyor, evenly distributed on the material plate of the preheating furnace, rotated from the entrance to the exit, and heated by the radiant tube during the rotation process, Pyrolysis occurs to produce pyrolysis oil gas and mixed semi-coke; among them, the temperature of the feed inlet is relatively low, which is 400-450°C, and the pyrolysis temperature of the uniform temperature field is 500-550°C; the pyrolysis oil gas produced by pyrolysis is from All ...

Embodiment 3

[0068] This embodiment is the same as the system used in the above-mentioned embodiment 1, but the process conditions are different, as described below. The agricultural waste with a particle size of less than 5mm and the liquefied residue at 360°C sent by the liquefied residue dedusting unit are mixed and stirred in a kneader. The mass ratio of the biomass to the liquefied residue is 1:0.6, and then pressed The ball machine is pressed and formed, and sent into the non-heat carrier regenerative rotary bed through the screw conveyor, evenly distributed on the material plate of the preheating furnace, rotated from the entrance to the exit, and heated by the radiant tube during the rotation process, Pyrolysis occurs, producing pyrolysis oil gas and mixed semi-coke; among them, the temperature of the feed inlet is relatively low, which is 450-480°C, and the pyrolysis temperature of the uniform temperature field is 600-650°C; the pyrolysis oil gas produced by pyrolysis is from The ...

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Abstract

The invention discloses a system and a method for pyrolyzing biomass and liquefied residue. The system comprises a mixed moulding unit, a co-pyrolyzing unit, a liquefied residue dedusting unit and a calcium carbide producing unit, wherein the mixed moulding unit comprises a biomass inlet, a liquefied residue inlet and a moulded ball outlet; the co-pyrolyzing unit comprises a moulded ball inlet, a pyrolyzed oil gas outlet and a mixed semicoke outlet; the liquefied residue dedusting unit is provided with a pyrolyzed gas inlet, a dedusted gas outlet and a dust-containing liquefied residue outlet; the calcium carbide producing unit is provided with a mixed semicoke inlet, a quick lime inlet, an oxygen-enriched gas nozzle, a calcium carbide furnace gas outlet and a calcium carbide outlet. According to the system and the method, provided by the invention, the liquid liquefied residue is used for dedusting the pyrolyzed gas obtained by pyrolyzing the biomass, the dust-containing liquefied residue is recycled and is mixed with the biomass for preparing the mixed semicoke through copyrolysis, and the sensible heat of the mixed semicoke is utilized for preparing calcium carbide, so that high-value utilization of the liquefied residue as well as energy conservation of the system are achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a system and method for pyrolysis of biomass and liquefaction residue. Background technique [0002] Biomass is a kind of renewable energy with a huge net increase in output. At present, waste from agriculture, forestry and animal husbandry is generally burned directly as fuel, but it often causes problems of insufficient combustion and serious environmental pollution. Compared with coal, the volatile content of biomass is high, and a large amount of light tar and pyrolysis gas can be obtained by pyrolysis; at the same time, the content of fixed carbon in pyrolysis biomass coke is high, and the content of sulfur, nitrogen and ash is low, and its composition is very suitable. It is used as raw material for the production of calcium carbide. However, the specific gravity of biomass is small, and dust is easily generated during the pyrolysis process, resulting...

Claims

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Application Information

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IPC IPC(8): C10B53/02C10B57/04C10B47/30C10B47/32C01B32/942
CPCC10B47/30C10B47/32C10B53/02C10B57/04Y02E50/10
Inventor 刘维娜丁力郭启海许修强吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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