SU1573207A1 - Method of continuous binding of dust - Google Patents

Abstract

The invention relates to the mining industry. The goal is to increase the efficiency of dust and explosion protection of workings by compensating for the loss of air humidity caused by heat and mass transfer processes. For this purpose, a map of the actual distribution of temperature and relative air humidity (HHV) for the entire network of workings is made, and a maximum HVM is established to ensure the dust and explosion safety of mine workings. Places in the workings with explosives are less extreme and install fine-dispersed water generators (HLT) and humidity sensors in them. The latter are tuned to the limit OVV and when the actual OVV deviates from it, the signal is generated to the operator or automated system. Relevant TLGs are turned on, saturate the air with droplet-liquid moisture and increase the OVV in all workings in the air flow, wetting the accumulation of coal dust and bringing the OVV to the maximum value. The humidity sensor stops the signal to the GTV and turns it off. Thus, the method allows to constantly maintain the maximum amount of HVM in all workings and ensure their effective dust explosion protection. 3 il.

Description

The arrows indicate the direction of the jet of air at work (Fig, 1).

The essence of the method is as follows.

For the entire mine network, simultaneously with the planned measurements of the amount of air, the relative humidity and temperature of the air are measured in each excavation. Put on the scheme of mine workings (or mining plan) the obtained information and get a map of the actual distribution of relative humidity and air temperature in all mine workings. Based on the conditions for ensuring reliable dust and explosion protection of openings for a given mine, the limit value of relative humidity of the air is established by known methods, ensuring the dust and explosion safety of openings (for example, W d 98-1006). Comparing the latter with the values of the relative humidity of the air on the map, establish places in the workings, where the relative humidity is less than the limit. For example, this output 1 4, 5 and 7 is not figure 1. The main reason for the decrease in relative humidity in the workings is heat and mass transfer processes, for example, an increase in air temperature by heating it in air heaters before entering the mine, adiabatic compression when air is lowered, heat exchange with side rocks, heating of mining engines, etc., with the most significant drop in relative humidity occurs when air is heated in heaters (up to 30-60%). The low relative humidity of the air passing through the outlets is the cause of the drainage of these openings. The time of action of the hydro-dust explosion-proof measures is reduced. For example, the relative humidity of the air is reduced by only 4% (from 99 to 95%), and the duration of the action of dust protection measures (say, wetting) is reduced by 6 times from 36 to 6 h.

In the workings (for example, 1, 4, 5 and 7), in places with low relative humidity, the generators 10 of finely dispersed water and humidity sensors 31 are installed.

The type and mode of operation of the 10 finely dispersed water generators are determined based on the condition

that the relative humidity must be raised to the limit value (98-100%). If available at the mine

compressed air as generators of finely dispersed water can be used foggers type TZ, OP, etc. In the absence of compressed air sprayers type

PRT, injector injectors, ejectors,

converters, etc. The humidity sensors are adjusted to the "limit value of relative humidity (98-100%) and in case of deviation from it

about the actual relative humidity in the generation, the signal goes to the operator (or, with automated control directly) - the inclusion of the corresponding

generators 10 finely dispersed water, saturation of the air in the workings with dropping liquid and moisture, wetting of coal dust and an increase in the relative air humidity in the workings to the maximum value (98-100%). After that, the humidity sensor stops the signal. Thus, the invention allows to continuously maintain the maximum value of the relative humidity in all mines of the mine,

. The constant limiting relative humidity of the mine air makes it possible to increase the effectiveness of the hydro-explosion protection measures carried out (washing, binding water) - ideally, repeating these measures will be required only with intensive new dust accumulations, and also

controlled process of water vapor supersaturation, reaching the dew point (with minor temperature fluctuations, the presence of condensation), the occurrence of fog, falling out of it (condensation) in the workings.

An experimental verification of the invention showed a high efficiency of dust explosion protection of workings in its application.

50

formula of invention

Method of continuous dust binding, including air saturation with drop-liquid moisture using generators located in workings

finely dispersed water, the movement of air with humidification and binding of coal dust deposited in the workings and the determination of the limiting value of relative humidity of the air providing dust and explosion safety, which is different from the fact that, in order to increase the efficiency of dust explosion, air, caused by heat and mass transfer processes, for the entire network of openings, make a map of the actual distribution relative to 732076

humidity and air temperature and determine places in workings with reduced relative air humidity in comparison with the limit, in which humidity sensors and generators of finely dispersed water are installed, while the latter are periodically turned on and off when the relative humidity deviates from the limit value.

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Claims (1)

Claim A method of continuous dust binding, including saturation of air with droplet-liquid moisture using finely dispersed water located in the generators, moving the air with moisturizing and bonding coal deposited in the mine workings ⁵ 1573 dust and determining the limit value of the relative humidity of the air, providing dust and explosion ^! security otlichayuschiy- g with me that, in order to increase the efficiency of dust explosion protection workings due to replenishment humidity loss caused by the heat and mass transfer processes for the entire network w workings make the map of the actual distribution of relative! July ⁶ Noah humidity and air temperature, and the place in workings with reduced relative humidity compared to the limit, in which humidity sensors * and generators of finely dispersed water are installed, while the latter periodically turn on t and off when the relative humidity deviates from the limit value. Aa Figure 2