Colloidal Inert Foam Preparation Device for Preventing Coal Spontaneous Combustion and Its Process

Abstract

The invention discloses a colloid-inhibiting inert foam preparation device for preventing coal spontaneous combustion. The colloid-inhibiting inert foam preparation device comprises a jet-flow proportional mixer device, a primary foaming device, a secondary foaming device and a gas conveying device which are connected in sequence; the jet-flow proportional mixer device comprises a jet-flow proportional mixer (a jet-flow mixer imitates a jet device on fire fighting, so that the dimension of each part of the jet-flow proportional mixer is obtained by certain computation according to practical needs, and then each part of the jet-flow proportional mixer is designed and customized), a high-pressure water inlet connected with a spray nozzle of the jet-flow proportional mixer, and a colloid-inhibiting liquid inlet connected with a liquid absorbing chamber of the jet-flow proportional mixer, wherein an output port of the jet-flow proportional mixer is connected with a liquid inlet of the primary foaming device. According to the colloid-inhibiting inert foam preparation device and the process for preventing the coal spontaneous combustion, pressure water and pressure nitrogen gas are taken as conveying power, so that the colloid-inhibiting inert foam preparation device and process are safe and reliable.

Description

technical field [0001] The invention relates to the technical field of coal spontaneous combustion prevention and fire extinguishing in goafs, in particular to a colloidal retardation inert foam preparation device for preventing coal spontaneous combustion and a process thereof. Background technique [0002] 56% of coal mines in the country are at risk of spontaneous combustion, causing direct and indirect economic losses of nearly 10 billion yuan each year. Existing fire prevention and extinguishing technologies all achieve fire prevention and extinguishment by reducing or reducing the combination of coal and oxygen. It is more difficult to block, inert and plug leaks in goafs with relatively smooth air leakage. Especially with the adoption of fully mechanized mining and fully mechanized caving mining technology, the intensity of mine mining has increased, the ventilation system has become relatively complex, and the scope of goafs has continued to expand, and goafs are the...

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Problems solved by technology

[0003] At present, the main means to prevent coal spontaneous combustion are cooling (such as water injection, grouting, colloid injection, three-phase foam injection, etc.) and goaf inertization (such as nitrogen injection, carbon dioxide injection, etc.). The fire prevention and extinguishing in the low-level space of the mining area has played a positive role, but it is not fully effective for the fire in the high-level space of the remote goaf

Since coal spontaneous combustion mostly occurs in the goaf, the area of ​​the goaf is large, the source of the fire is relatively hidden and it is difficult to determine its specific location, conventional fire prevention materials are difficult to fill in a large area, and do not have good accumulation properties. It is not ideal for the prevention and control of coal spontaneous combustion fires in gobs and other areas of working faces

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