SU798322A1 - Quarry airing arrangement - Google Patents

Description

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The invention relates to the mining industry and can be used for ventilation of quarries, as well as various industrial and construction sites.

A device for ventilating a pit consisting of heaters mounted on a frame with shell 1 is known.

It is also known a device for ventilated and quarry, including nozzles, pipelines for fuel supply and pumping units C2.

A disadvantage of the known devices is that as a result of using various heaters to create a convective flow during ventilation, a high degree of concentration of thermal energy is obtained, resulting in a narrow convective flow with large heat losses that cannot ensure full ventilation of the pit. Moreover, the BO S of the spirit is reduced in the jet, as well as when using the devices of these devices. Large capital and operating costs are required.

The closest technical solution to the present invention is a device for ventilating a pit with air jet sources that constitute a closed air duct system of uniform distribution, whereby clean air enters the inner region contoured by the air duct and prevents the spread of impurities from the space outside the air duct (31.

A disadvantage of the known device is that its efficiency depends on the intensity of air movement in the upper layers of the atmosphere, which is able to carry harmful impurities out of the pit. This device can only be used for local ventilation, and it cannot be cleaned by atmospheric conditions throughout the entire quarry.

The purpose of the invention is to increase the efficiency of ventilation due to the formation of mutually opposing air flows, increasing the intensity of heat exchange.

Claims (3)

The goal is achieved by the fact that the device is equipped with a heat source, made in the form of an open reservoir of a cone-shaped form, and a device for controlling the water level in the reservoir, with this heat source placed inside a closed contour formed by sources of aoheal jets, the possibility of changing the direction angle of the air jet depending on the change in the level of the reservoir. FIG. 1 shows a device for aerating the quarry; in fig. 2 the same, top view. A pit ventilation device consists of a closed circuit of sources of 1 air jets, inside of which an open reservoir 2 is placed with an adjustable level of heat-transfer water, and at its base has a discharge 3. Sources 1 of air jets, mounted on farms 4, create reciprocating air flows 5. To increase the intensity of heat exchange, a portion of the water — the heat transfer medium is sprayed above the pool surface through the nozzles b, which is supplied through line 7. The level of water in the pool is controlled by pumping water through pipeline and pumping station 9. The device operates as follows. Due to the positive temperature difference between the coolant water collected in the cone-shaped basin 2 and the open-air atmosphere, convective air flow is formed, which is directed upwards from the bottom. Sources 1 of air jets forming a closed loop around an open pool create mutually opposing streams of air jets near the water surface, due to which there is an intensive heat exchange between the heat-transfer water and the open-air atmosphere when a convective air flow is formed the direction of the air jet is turned. In addition, to intensify the heat exchange and humidify the air, part of the heating water is sprayed over the surface of the reservoir through the nozzles b, and with insufficient positive temperature difference between the heat carrier and the atmosphere, the spray water is heated by heaters installed in the pump station 9. Thus a moistened convective flow of sufficient power is created to ventilate the entire quarry. The water level in the pool is regulated by the evacuation pumps installed in the pump station 9, and due to the fact that the pool is designed as an expanding cone-shaped notch, the surface of the heat-transfer water changes as the water level changes. to form a convective flow, the power of which is regulated depending on the state of the quarry atmosphere in a wide range at the same time by several parameters: the change in the surface of the heating water, i.e. if it is necessary to increase the ms of the convective flow, then increase the surface of the water | heat carrier with which it produces (with heat exchange J changing the direction and speed of movement of mutually opposing air jets above the water surface; changing the amount of water sprayed over the pool surface and its temperature. Thus, the proposed device allows the entire quarry to be aired under any meteorological conditions. with an increase in the efficiency of pit ventilation, reduction in working time losses resulting from forced downtime with unacceptable pollution of the quarry atmosphere, reduction in overall costs: for ventilation The invention’s apparatus for ventilation of the quarry, including sources of air jets forming a closed loop, distinguished by that, in order to increase the ventilation efficiency due to the formation of mutually opposing air flows, increasing the intensity of heat exchange between the air ohm and coolant water, equipped with a heat source made in the form of an open cone-shaped reservoir, and a device for controlling the level of water in the reservoir, with the specified heat source placed inside a closed loop formed by sources of air jets, and the source of air jets are adjustable the direction of the air jets depending on the change in the fill level of the water body. Sources of information taken into account in the examination 1. The author's certificate of the USSR 307191, cl. E 21 C 47/00, 1969. 2. Authors certificate of the USSR 311009, cl. E 21 C 47/00, 1970. 3. USSR author's certificate number 479873, cl. E 21 F 1/08, 1970. - - jw "(4N. Fmg.1