Combustor structure of methane fan heater

Abstract

The invention belongs to heat exchange devices in heat energy power engineering. The invention discloses a combustor structure of a methane fan heater. A methane nozzle device (2), a Venturi tube (3), a pre-mixer (4) and a methane nozzle opening (5) are sequentially arranged on a base (1) from bottom to top; a methane inlet pipe (24) is horizontally and transversely connected with a nozzle seat body (25); an air damper adjustor (22) is arranged between a methane outlet on the nozzle seat body (25) and an inlet of the Venturi tube (3); the Venturi tube (3) is vertically arranged; a small horn mouth on the lower part of the Venturi tube is arranged on an upper surface of the nozzle seat body (25), and a large horn mouth on the upper part of the Venturi tube is butted with an air inlet of the methane nozzle opening (5); the lower part of the methane nozzle opening (5) is provided with a diffusion section (53), and the upper part of the methane nozzle opening (5) is provided with a methane nozzle outlet; and the pre-mixer (4) is arranged between the large horn mouth of the Venturi tube (3) and the air inlet of the methane nozzle opening (5). A combustor having a large combustion port can be formed by arranging a plurality of rows of methane nozzle openings (5) in parallel and is applicable to methane combustion for villages, and the combustor which is applicable to methane combustion in a large space for warming is provided.

Description

[0001] technical field [0002] The invention belongs to the heat exchange technology in thermal power engineering, in particular to a burner device in a biogas heater. Background technique [0003] Biogas combustion, mainly methane in biogas, reacts with oxygen in the air at a certain temperature, and emits a lot of light and heat. Its reaction formula is: CH 4 + 2O 2 ---→ CO 2 + 2H 2 0 + heat, other components in biogas, such as carbon monoxide, hydrogen, hydrogen sulfide and other gases, can also be burned in the air, but because of their low content, they do not play a major role in the combustion. Biogas combustion should meet the following conditions: 1. Combustible components in biogas and oxygen in the air are mixed in a certain proportion and reach the ignition point (650-750°C). 2. The biogas can be supplied continuously and the gas velocity is lower than the propagation velocity of the flame (0.67 m / s). ⒊To achieve stable combustion, the biogas pressure...

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Problems solved by technology

[0011] The biogas burner in the prior art only has a stove burner structure used in the kitchen. The lower part is a gas intake, and the upper disc-type multi-hole structure has a concentrated fire head, which is very suitable for cooking. However, the fire head is small and the flame Concentrated, but hardly suitable for large-scale and large-space heating, used as a heater for burning biogas

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