Foam preparation device for preventing and extinguishing coal mine fire

Abstract

The invention relates to a foam preparation device for preventing and extinguishing coal mine fire. The foam preparation device comprises a slurry injection inlet pipe, a filter, a sewage discharge outlet pipe, a static mixing agitator, a foam maker, an air inlet pipe, an air compressor or a nitrogen injection machine and a slurry injection outlet pipe, wherein the filter is connected with an outlet end of the slurry injection inlet pipe, and a filter screen is installed in the filter; the sewage discharge outlet pipe is communicated with the filter; the static mixing agitator is connected with an outlet end of the filter; the foam maker is connected with an outlet end of the static mixing agitator; the air inlet pipe is arranged on the cylinder wall of the foam maker, and a cut-off valve, an air inlet pipe pressure gauge and an air inlet pipe valve are installed on the air inlet pipe in sequence; the air compressor or the nitrogen injection machine is communicated with the foam maker through the air inlet pipe; and the slurry injection outlet pipe is connected with an output end of the foam maker. The static mixing agitator comprises an agitator cylinder body, an agitator center shaft, a long barrier sheet and a short barrier sheet, a circulating hole is arranged on the long barrier sheet, the diameter of the long barrier sheet is greater than that of the short barrier sheet, and the locating sleeve is arranged between the long barrier sheet and the short barrier sheet. The foam preparation device provided by the invention has a compact and reasonable structure, is convenient to maintain, is applicable to underground rapid extinguishing of coal mines and can be used for efficiently preventing and controlling coal spontaneous combustion fire.

Description

technical field [0001] The invention relates to a foam preparation device, in particular to a foam preparation device 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 coal burned every year is 10-13.6 million tons, and the economic loss exceeds 20 billion yuan. Moreover, coalfield fires also cause large-scale vegetation damage and desertification of the soil. For mines where coal spontaneous combustion and gas hidden dangers coexist, if coal spontaneous combustion is not prevented If it is put in place, it is easy to cause a gas explosion b...

AI Technical Summary

Problems solved by technology

However, due to the special environment and conditions of coal mines, the mixture slurry contains impurities or large solid particles. The existing foam preparation device for fire prevention and extinguishing in coal mines often has poor mixing and stirring effects, and pipe plugging is prone to occur, resulting in failure Three-phase foam is continuously formed. Due to the defects of the above two conditions, the popularization and use of three-phase foam in mines is limited

Images