RU2605511C1 - Method for ventilation of block automated boilers rooms - Google Patents

Abstract

FIELD: ventilation.

SUBSTANCE: invention relates to ventilation system of block of automated boiler. Method of block automated boiler ventilation is characterized by the fact that cold external air under negative pressure created by burner blow fan is supplied via louvered grille, insulated valve and insulated supply air duct, which is parallel to the plane of boiler house roof, and heater with confuser located under the heat insulated supply air duct aligned to flow of external air, coming from supply air duct, collects air from boiler room, heating it and directing hot air flow through confuser parallel to supplied external air flow, cutting supply of cold air in the lower zone of boiler room and directing it into the zone of excessive heat.

EFFECT: technical result is increased quality of air heating for fuel combustion process, uniform of heating of premises, increasing energy efficiency of ventilation system, excluding "dead" zones and reduced probability of explosive mixtures formation.

1 cl, 1 dwg

Description

The invention relates to the field of engineering equipment of industrial buildings and is directed to the organization of a ventilation system of block automated boiler rooms.

Known methods of organizing a ventilation system using air-heating units operating on the principle of air-heat curtains (see Bogoslovsky V.N. Heating and ventilation. In two parts. Part II. Ventilation / V.N. Bogoslovsky, V.I. Novozhilov, B.D. Simakov, V.P. Titov - M .: Stroyizdat, 1976, p. 311-332). The methods of using heating units described in the source for heating the air going to combustion and general exchange ventilation, as applied to block automated boiler rooms, have a number of disadvantages:

- the use of a fan heater, directed perpendicular to the flow of incoming air and operating on the principle of an air-heat curtain, is ineffective in block automated boiler houses at low negative temperatures and high speeds of the supplied external air: two air flows with different densities and speeds above 1 m / s, colliding, they are mixed only in the contact zone of the streams, while the direction of flow changes. Part of the cold air after contact with the air flow from the water heater, having a higher density, falls into the lower zone of the boiler room. Hot air from a water fan heater, having a lower density, after a collision with cold air, on the contrary, enters the upper zone of the room, thereby part of the heat intended for heating the outdoor air is consumed for other purposes and the overall efficiency of the fan heaters is reduced;

- because hot air accumulates at the top, overheating of the upper zone is created, which leads to increased heat loss through the roof of the building of the block boiler room;

- cold air from the lower zone of the boiler room enters the burner. The participation of cold air in the process of fuel combustion leads to a decrease in boiler efficiency;

- the formation of cold air currents near the floor of the boiler room creates a risk of freezing of equipment.

The task to which the claimed solution is directed is to increase the efficiency and reliability of the ventilation system of automated block boiler rooms.

Technical result: improving the quality of air heating required for the fuel combustion process, increasing the uniformity of heating the room, increasing the energy efficiency of the ventilation system, eliminating the formation of "stagnant" zones and, as a result, reducing the likelihood of the formation of explosive mixtures, ensuring the operation of the boiler in design conditions.

The specified technical result is achieved by the fact that in the method of ventilation of block automated boiler houses, cold outside air under the influence of vacuum created by the blower of the burner of the burner enters through the louvre grille, a heat-insulated valve and a heat-insulated supply air duct, which is installed parallel to the plane of the roof of the boiler room, and the fan heater, with a confuser, is located under a warmed supply air duct, codirectionally, the flow of external air coming from the supply air duct takes the spirit from the boiler room, heating it and directing the flow of hot air through the confuser parallel to the incoming external stream, cutting off the flow of cold air into the lower zone of the boiler room and directing it to the heat-excess zone, thereby warming the outside air, providing air circulation and assimilating the generated heat of the room boiler room.

The method is illustrated in the drawing, which shows a diagram of the heating and ventilation of a block automated boiler room.

The proposed ventilation system contains a supply air duct 1, which is insulated to exclude the possibility of condensation. A water fan heater 2 is installed under the bottom surface of the duct. After the fan heater, a confuser 3 is installed, which provides a width of a stream of hot air sufficient to exclude the possibility of lowering the flow of cold air. Outside the supply aperture, a louvre grille 6 is installed, then the air passes through the insulated valve 5 and air duct 1. After the air duct, the flow of external air enters under the roof surface of the block boiler room (shown in large figure). Despite the fact that cold, outside air has a higher density, the flow of hot air from the confuser prevents it from dropping into the lower part of the boiler room. The flow of hot and cold air passes through the upper zone, where the cold air is heated. Next, part of the heated air enters the blower fan of burner 4, and the remaining part, continuing to circulate, again enters the fan heater 2. A constant air circulation is generated in the room, which increases the temperature uniformity in volume and eliminates the formation of “stagnant” zones.

The regulation of this system can be carried out both qualitatively by changing the temperature of the water supplied to the fan heater, and quantitatively by changing the frequency of rotation of the fan heater.

The claimed technical solution is universal in nature, because It can also be used for cooling the premises during the summer and transitional periods. In this case, it is enough to either stop the circulation of hot water through the fan heater, or circulate cold water.

Thus, the proposed method of ventilation of block automated boiler rooms allows to achieve the following technical results: to increase the uniformity of heating the entire volume of the room, eliminate overheating of the upper zone, thereby reducing heat loss through the roof, eliminate the possibility of stagnant zones, which eliminates the possibility of accumulation of gaseous fuel leaks with subsequent the formation of explosive mixtures, assimilate apparent excess heat, thereby increasing the energy efficiency of the entire valve system uu boiler, to cool the boiler room in the warm season, exclude decrease boiler efficiency because of participation from cold outside air during combustion.

Claims (1)

The method of ventilation of automated block boiler rooms, characterized in that the cold outside air under the influence of the vacuum created by the blower blower of the burner enters through the louvre grille, a heat-insulated valve and a heat-insulated supply air duct, which is installed parallel to the plane of the boiler room roof, and a fan heater with a confuser, located under the heat-insulated supply the air duct in parallel with the flow of external air coming from the supply air duct takes air from the boiler room, odogrevaya it and directing the flow of hot air through converger parallel incoming external flow shutting inflow of cold air into the lower zone of the boiler room and directing it into a zone with excess heat, thereby warming the outside air to circulate the air and assimilating generated heat boiler room.

Images