RU1788396C - Natural ventilation system of production location - Google Patents

Abstract

Usage: in ventilation. SUMMARY OF THE INVENTION: sectional shafts have different heights and are installed on the roof of the production room across the building, two air ducts are located at each base of the mine, located under the roof and extending from the shaft mouth to opposite sides of the building, and there are no air ducts bottom wall. 5 ill.

Description

The invention relates to ventilation.

Known natural ventilation system of industrial premises, which is an analogue of the claimed invention, is designed to remove harmful substances from uniformly dispersed sources and containing a bell placed in opposite directions on the sides of the roof in a checkerboard pattern and exhaust pipes with deflectors located on the mouth of the bell along the axis of the roof.

The disadvantage of this natural ventilation system is the unevenness of air removal throughout the room.

Also known is the forced-air and exhaust ventilation system of industrial premises, which is a prototype of the invention, designed to remove harmful substances from evenly dispersed sources, and which contains sectional exhaust shafts located on the roof of the room along the workshop.

A disadvantage of this system is also the unevenness of the natural air removal over the entire area of the production room.

It should also be noted that all sectional chambers have a high bay, which impairs the dispersion of harmful substances removed into the atmosphere along with aeration air.

The aim of the invention is to increase the efficiency of the natural ventilation system of industrial premises with uniformly distributed sources of hazardous emissions.

To achieve this, sectional shafts having different heights are mounted on the roof of the production room across the building. Two air ducts are located at each base of the shaft, located under the roof and extending from the shaft mouth in opposite directions along the room. These ducts do not have a bottom wall.

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Fig. 1 shows a general view of the proposed natural ventilation system; Fig. 2 is a cross-sectional view of a manufacturing facility with the proposed natural ventilation system; in FIG. 3 is a view of the roof from below the production room; in FIG. 4 shows the movement of the air flow of the Zionrngo air aero inside the room for prototype a and the device of FIG. 5 is a graph of the averaged value of excess air temperature (At 0 C) over the area of the working area of the prototype and the proposed device.

The proposed device of the natural ventilation system of industrial premises (Figs. 1, 2, 4) contains pairwise uneven sectional shafts 1, 2, 3. Each section of the shaft has a cap 4 to prevent wind blowing of the shaft.

Under the roof of the production room, ducts 6, 7, 8 are adjacent to the shafts. Each duct is commensurate with the height of the shaft to which it adjoins (Figs. 1, 3, 4). Each duct from the bottom has an entire opening 9 along the entire length, which has a lower wall 10 under the mouth of the shaft.

The proposed natural ventilation system of industrial premises works as follows. g

Due to the uniformly distributed sources of hazardous emissions over the area of the production room, there is a uniform flow of heat to the roof (Fig. 4) containing these hazards. The air ducts 6, 7, 8 located under the roof (Fig. 3), which provide the air gap to the air gap. The uniformity of aeration air under the roof of the production room eliminates the formation of secondary circulating airflows in it, which would fall into the work area and impair the air composition in it, as is the case in the prototype (Fig. 4a).

In FIG. 5 shows a graph of the averaged value of excess air temperature (At 0 C) over the entire area of the working room with a ventilation system for the prototype (curve 1) and for the proposed device (curve 2).

Laboratory studies showed (Fig. 5) that the permissible value of excess air temperature in the working area of the production room for the prototype is achieved only on an area equal to 74%, for the proposed natural ventilation system - throughout

Square will produce a bathroom. The length of the ducts 6, 7.8, located

under the roof of the production room, commensurate with the height of the shafts 1, 2, 3, which compensates for the additional resistance of longer ducts.

The removal of air from the production room with the help of shafts of various heights also contributes to a better dispersion of harmful substances in the air. -.

The invention can be attributed to inventions of considerable interest for industrial enterprises with hot shops at uniform

dispersed sources of hazardous emissions.

The proposed system makes it possible to reduce hazards at workplaces to permissible limits, which contributes to a significant improvement in conditions and an increase in labor productivity.

Claims (1)

The claims The natural ventilation system of the production room, containing shafts with mouths located on the roof along the room, characterized in that, in order to increase the efficiency of natural air exchange, the system further comprises shafts located in cross section rooms with a height increasing to the center, and air ducts adjacent to the mouth of the shafts and located along the room, the air ducts being made open at the bottom with the mouth closed. / i / I xJ U  i v D, 4 R t t-g 4 ve. 2