Mining integral dust-lowering foam preparing device

Abstract

A mining integral dust-lowering foam preparing device is mainly composed of a pressurized water supply pipe, a foaming agent premixing cylinder, a pressurized air supply pipe, a gas-liquid mixing accelerating cylinder, and a gradually expanding whirl foam producing cylinder. The foaming agent premixing cylinder, the pressurized air supply pipe, the gas-liquid mixing accelerating cylinder, and thegradually expanding whirl foam producing cylinder are arranged on a same axis. A spiral water jet nozzle, a liquid self-suction chamber, a premixing chamber, a diffusing chamber, and a mixed liquid flow-out chamber are arranged in the foaming agent premixing cylinder in sequence. The liquid self-suction chamber is provided with a liquid suction pipe port that is connected to a liquid suction pipe.The pressurized water supply pipe is connected to the spiral water jet nozzle through a quick connector. In the gas-liquid mixing accelerating cylinder, an air inlet chamber, an annular air jet nozzle set, a mixed liquid accelerating chamber, and a gas-liquid mixing chamber are arranged in sequence. The pressurized air supply pipe is connected to the air inlet chamber through a quick connector. The gradually expanding whirl foam producing cylinder is in a horn shape. A whirl foam producing element is fixed in the gradually expanding whirl foam producing cylinder. The structure is simple and reliable. The device does not contain any movable component and is suitable for efficiently reducing dust in a limited space in a well; and the operation and maintenance are simple and convenient.

Description

technical field [0001] The invention belongs to the technical field of safe production, and in particular relates to a mine-used integrated dust-reducing foam preparation device, which is especially suitable for efficient preparation of dust-reducing foam in a restricted space underground in coal mines where it is difficult to install electrical equipment. Background technique [0002] As a gas-liquid two-phase mixture, foam has a larger gas-liquid interface area than water mist, which increases the contact area with dust, and the foam contains foaming agent components, which enhances the wetting performance of the foam and can Quickly wet the dust, the foam has accumulation and adhesion, can form a wrapping layer at the dust source, and suppress the generation of airborne dust. At the same time, the continuous foam formed when the foam is sprayed can capture and settle by effectively wrapping the dust source Therefore, the effect of foam dust suppression is significantly im...

AI Technical Summary

Problems solved by technology

[0003] Due to the complex mine conditions, and the foam dust suppression technology also faces the bottleneck of difficulty in the preparation of dust suppression foam and high operating costs, which seriously hinder the development and application of this technology

At home and abroad, the net foam generator is mainly used to prepare foam. This kind of foam generator sends the foaming liquid to the metal mesh for foaming by mechanical ventilation. It has the characteristics of high foaming multiple and large foam production, but it is only suitable for low pressure supply. Due to the wind and water supply conditions, the foam flow speed is small and the spray distance is short, so the foam cannot be effectively sent to the dust-producing place where the mining machinery cuts coal and rock, and an external fan is required to provide power, so it is difficult to meet the dust suppression requirements of the dust-producing place on the mining face ; and the range of wind pressure and water pressure applicable to this type of foamer is narrow, which may easily lead to unstable foaming process, and the foaming rate is usually <60%

Pore-filled foamers have also been used abroad. Its working principle is to use the filler with tiny pores in the foamer to increase the mixing strength of gas and liquid to form foam. This kind of foamer is used for water quality in coal mines. It is easy to block during the process, and it is difficult to clean

Patent No. 200810235773.9 discloses a foam generating device for dust removal in coal mines. It mainly includes cylinder body, venturi tube, spoiler, barrier plate and other parts. The side of the bubbler cylinder enters, and the gas and liquid are mixed through the spoiler and multiple baffle plates. Due to the mutual influence of the wind and water pressure in the spoiler, it often leads to the phenomenon of "backflow" of the wind and water, and the stability of the device is poor, and the mixing and foaming The process pressure loss is too large, resulting in insufficient foam outlet pressure, unable to meet the foam injection requirements

Images