New low-concentration coalbed methane or gas steam boiler

Abstract

The invention discloses a new low-concentration coalbed methane or gas steam boiler, which comprises an upper boiler barrel and a lower boiler barrel. The lower part of a water cooled wall of the external lateral wall is vertically communicated with a lower header; the upper part of the water cooled wall of the external lateral wall is obliquely bent to the upper boiler barrel and communicated with the upper boiler barrel. In order to ensure the good hydrodynamic characteristic of the water cooled wall of the external lateral wall, the lower header is communicated with the lower boiler barrel through three connecting pipes. The water cooled wall of an internal lateral wall is directly arranged on the upper boiler barrel and the lower boiler barrel to communicate the upper boiler barrel with the lower boiler barrel. The water cooled wall of a front wall, an upper header of the water cooled wall of a back wall and the upper boiler barrel are communicated with each other. The water cooled wall of the back wall, the lower header of the water cooled wall of the back wall and the lower header are communicated with each other. The water cooled wall of the external lateral wall, the water cooled water of the internal lateral wall, the water cooled wall of the front wall and the water cooled wall of the back wall form four sides; a furnace is formed in the center of the four sides; a burner is installed on the bottom part of the furnace. The low-concentration coalbed methane or gas steam boiler has the following beneficial effects: the boiler adopts the low-gas burner to provide production and living steam or hot water for mining areas, and replaces the conventional coal-fired boiler, so benefits of energy saving and emission reduction are good.

Description

technical field [0001] The invention belongs to the technical field of thermal equipment, and relates to a novel low-concentration coalbed methane or gas steam boiler. Background technique [0002] Low-concentration coalbed methane (gas) usually refers to gas with a concentration lower than 30%, which is a mixture of methane and air. Low-concentration coalbed methane (gas) boiler refers to a boiler that burns low-concentration coalbed methane (gas) to generate steam or hot water. The minimum flammable concentration of coalbed methane (gas) is 3%. It is a medium-low pressure small boiler. [0003] The concentration of coalbed methane (gas) extracted from high gassy mines is generally lower than 30%. Due to its low calorific value and being in or close to the explosive concentration range, it cannot be safely, stably and efficiently burned and utilized on existing combustion equipment. In addition, there are other types of gases such as blast furnace gas, coke oven gas, under...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a new type of low-concentration coalbed methane or gas steam boi

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