Device for preparing bio-oil from waste manmade boards by thermochemical clean conversion

Abstract

The invention relates to a device for preparing bio-oil from waste manmade boards by thermochemical clean conversion, which belongs to the technical field of energy utilization of wastes. The device comprises a pre-pyrolyzing apparatus, a main pyrolyzing apparatus, a gas-solid separator, a condenser, a heat exchanger, a cyclone hydraulic separator, an electrostatic dust collector, a gas distributor and the like, wherein the upper part of the main pyrolyzing apparatus is provided with a fluidized bed reactor outside which a flue is arranged; the flue is connected with an external flue of the pre-pyrolyzing apparatus; a high-temperature furnace is arranged at the bottom of the main pyrolyzing apparatus; the lower part of the fluidized bed reactor is extended into a combustion chamber on theupper part of the high-temperature furnace, and is connected with the gas distributor through a pipeline; and the upper part of the fluidized bed reactor is sequentially connected with the gas-solid separator, the condenser, the cyclone hydraulic separator and the like. The device is provided with the pre-pyrolyzing apparatus so as to effectively remove 70 to 80 percent N-containing compounds produced by the pyrolysis of the manmade boards and greatly reduce the negative effects of fast pyrolysis products of the manmade boards in subsequent processes, and has the characteristics of compact structure, high energy efficiency and low bio-oil preparation cost.

Description

technical field [0001] The invention relates to a device for preparing bio-oil through thermochemical clean conversion of waste wood-based panels, belonging to the technical field of waste energy utilization. Background technique [0002] Thermochemical conversion technology to prepare bio-oil is one of the most promising methods for energy utilization of woody biomass organic materials. A large number of waste wood-based panels are produced every year in China, and the main component of waste wood-based panels is woody biomass. Therefore, using thermochemical methods to convert waste wood-based panels into bio-oil has a very broad market prospect. [0003] The technology of thermochemical conversion to prepare bio-oil mainly refers to fast pyrolysis technology. Due to the various adhesives contained in waste wood-based panels, N-containing compounds will be produced during the conventional rapid pyrolysis process, and these N-containing compounds will dissolve in the bio-o...

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Problems solved by technology

Due to the various adhesives contained in waste wood-based panels, N-containing compounds will be produced during the conventional rapid pyrolysis process, and these N-containing compounds will dissolve in the bio-oil during the condensation process of the rapid pyrolysis, thereby increasing the corrosion of bio-oil It will also have a negative impact on the subsequent utilization of bio-oil; in addition, waste wood-based panels will also produce environmentally harmful substances such as nitrogen oxides during the rapid pyrolysis process. These substances require additional treatment to meet environmental protection requirements, which will undoubtedly increase. The cost of producing bio-oil from waste wood-based panels using conventional fast pyrolysis process

[0004] The applicant once proposed "a small-scale mobile rapid pyrolysis device for agricultural and forestry biomass" with the application number 200910170228.4. This device is used for the thermochemical clean transformation of waste wood-based panels, but it cannot effectively remove harmful pollutants in the product. The gas produced during the reaction cannot meet the emission standards

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