Foam generator for preventing and extinguishing fire in coal mine

Abstract

The invention relates to a foam generator for preventing and extinguishing fire in a coal mine, which comprises a feed pipe, a mixer connected with the outlet end of the feed pipe, a foam generator barrel connected with the outlet end of the mixer, an air inlet pipe arranged on the front wall of the foam generator barrel, a Venturi tube arranged at the inner inlet end of the foam generator barrel, a current collector arranged at the outlet end of the Venturi tube in the foam generator barrel, a fixed rod arranged behind the current collector in the foam generator barrel, and an impeller arranged at the middle rear part of the fixed rod, wherein an air inlet hole is arranged in the rear wall of the Venturi tube, the current collector is arranged at the front end of the fixed rod, a mixer middle shaft arranged along the axis of the mixer is arranged in the mixer, and a stirring blade is arranged on the mixer middle shaft. The foam generator adopts a manner that the stirring blade is arranged in the mixer, so that mixed slurry can be mixed uniformly, material can not block the tube easily, the use is reliable, the fire can be effectively extinguished, the structure is compact and reasonable, and the maintenance is convenient; and the foam generator is applicable to quickly extinguishing the fire underground and efficiently preventing spontaneous combustion fire of coals.

Description

technical field [0001] The invention relates to a foam generator, in particular to a fire-preventing foam generator for quickly extinguishing and preventing coal spontaneous combustion fires in underground coal mines. Background technique [0002] Coal spontaneous combustion is one of the main natural disasters in mines in my country. In key state-owned coal mines in China, fires caused by coal spontaneous combustion account for about 90% of the total number of mine fires. There are still large-scale coalfield fires in Xinjiang, Ningxia, Inner Mongolia and other provinces in my country. , The amount of burned coal per year reaches 10-13.6 million tons, and the economic loss exceeds 20 billion yuan. In addition, the spontaneous combustion of coal will also produce a large amount of SO 2 , CO, CO 2 and other toxic gases, which seriously pollute the environment and easily cause casualties. In order to effectively prevent coal spontaneous combustion, in recent years, a three-p...

AI Technical Summary

Problems solved by technology

However, this kind of foam generator needs to install a barrier plate in the mixer, which not only complicates the manufacturing process, but also tends to cause stagnation when the mixture such as yellow mud and fly ash passes through, which affects the foaming effect.

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