Side suction type anaerobic medium-temperature pyrolysis furnace

Abstract

The invention discloses a side suction type anaerobic medium-temperature pyrolysis furnace which comprises a pyrolysis furnace as well as an anaerobic medium-temperature gas source mechanism, whereinthe pyrolysis furnace is internally provided with a grate; a feeding hole is formed above the grate in the pyrolysis furnace; a closed feeder is arranged at the feeding hole in match; a discharge holeis formed below the grate and in the pyrolysis furnace; a closed discharger is arranged at the discharge hole in match; the anaerobic medium-temperature gas source mechanism is arranged outside the pyrolysis furnace and is used for supplying flue gas into the pyrolysis furnace; the anaerobic medium-temperature gas source mechanism comprises a combustor; the inlet of the combustor is connected with an input pipeline for supplying a combustion gas to the combustor; the outlet of the combustor is connected with a flue gas output pipeline; the flue gas output pipeline is guided into the pyrolysisfurnace and is positioned below the grate; and a combustible gas collection mechanism is arranged on the side wall above the grate in the pyrolysis furnace to form a side suction type structure. Theside suction type anaerobic medium-temperature pyrolysis furnace is capable of effectively ensuring that biomass in the pyrolysis furance is at an optimal separation temperature for separating a combustible gas, and meanwhile avoids explosion risks caused by a gas bag formed by the combustible gas in the pyrolysis furnace.

Description

Technical field [0001] The invention relates to the technical field of biomass pyrolysis, in particular to a side suction type oxygen-free medium temperature pyrolysis furnace. Background technique [0002] Biomass gasification is under certain thermodynamic conditions, with the help of air (or oxygen) and water vapor, so that biomass polymers undergo pyrolysis, oxidation, reduction and reforming reactions, and finally converted into carbon monoxide and hydrogen. And low-molecular-weight hydrocarbons and other combustible gases. [0003] The key to biomass gasification lies in the gasifier. The currently used gasifiers include up-suction, down-suction, open-mouth and fluidized bed. The reaction process of different biomass is also different. Common gasification furnace reactions can be divided into oxidation layer, reduction layer, cracking layer and drying layer: [0004] 1) Oxidation layer: The main reaction of biomass in the oxide layer is oxidation reaction. The gasification ag...

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Problems solved by technology

[0012] The above-mentioned technical solutions all adopt the conventional gasification furnace arrangement form of oxidation layer, reduction layer, cracking layer and drying layer. However, it is found in the application that since the gasification agent generally uses oxygen-containing normal temperature air, it is introduced into the gas from the lower part of the grate. In the gasification zone, it is difficult to control the combustion reaction, and the temperature is often too high to exceed the optimum precipitation temperature of the biomass to precipitate combustible gas, which ultimately affects the precipitation of combustible gas; and the gas export of conventional gasifiers requires the cooperation of high-power fans. Realize continuous pumping, high energy consumption

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