RU1774125C - Boiler - Google Patents

Abstract

Usage: in the power system, in steam boilers. SUMMARY OF THE INVENTION: burners 4 are placed on the walls 3 of the furnace 2 of boiler 1. They receive gas-air mixture from the mixing air heater 6 connected to the atmosphere through the fan 10 and to the convective gas duct 5 through the smoke exhauster 11. In the walls 3 of the furnace 2 above the burners 4 there are hollow channels 12 provided with gas distribution tubes 13 with radial outlet nozzles 14 into which the gas-air mixture flows through an additional pipe 15. The latter washes the walls 3 of the furnace 2 with a creeping stream and cools them. 2 ill.

Description

Figure 1

The invention relates to the field of power engineering, in particular to steam boilers, and will improve the efficiency and reliability of their operation.

A boiler plant is known in which a gas-air mixture is supplied through a gas pipeline to the burners of a combustion chamber, the flue gas being taken from the upper part of the combustion chamber 1.

A disadvantage of such a device is its low profitability and reliability due to the possible local exposure of the torch to the lining and large heat losses through the lining to the environment.

A boiler is known in which burner devices are connected to a chimney and air duct 2.

The disadvantage of such a boiler is low efficiency and reliability due to the possibility of overheating and melting of the lining with local exposure to the torch and large heat losses through the walls of the combustion chamber

The aim of the invention is to increase the efficiency and reliability of steam boilers.

The essence of the invention lies in the fact that in a boiler containing a furnace, on the walls of which there are burners, a convective gas duct equipped with a mixing air heater connected by nozzles for exhausting the gas-air mixture, supplying air and flue gases, respectively, with the burners, through the blower fan, with the air duct and through smoke exhaust with a convective gas duct, hollow channels made with gas distribution tubes with radial exhaust nozzles are made in the walls of the furnace above the burners, a mixing air heater is connected with the indicated channels with an additional outlet pipe for the gas-air mixture.

In FIG. 1 shows the proposed boiler; in FIG. 2 is a section AA in FIG. 1,

In FIG. 1 and 2 are marked: 1 - a boiler, 2 - a furnace, 3 - a furnace wall, 4 - burners, 5 - a convective gas duct, 6 - a mixing air heater, 7 - a pipe for exhausting a gas-air mixture, 8 - a pipe for supplying air, 9 - a pipe for supplying flue gases, 10 - a fan, 11 - a smoke exhaust, 12 - hollow channels, 13 - gas distribution tubes, 14 - radial exhaust nozzles, 15 - an additional outlet pipe of the gas-air mixture.

The boiler operates as follows. In the furnace 2 of boiler 1 (Fig. -1), in burners 4, fuel is burned. The furnace 2 has walls 3 in which burners 4 are installed. In burners 4

from the mixing air heater 6, a gas-air mixture is supplied through a branch pipe for exhausting the gas-air mixture 7. The gas-air mixture in the mixing air heater 6 is prepared by mixing gas and air. Air and gas are supplied by means of a fan 10 and a smoke exhauster 11 through nozzles 8 and 9. Flue gases through a nozzle - pipe 9 are supplied from a convection duct

5. Through an additional outlet pipe for the gas-air mixture 15, the gas-air mixture is fed into the hollow channels 12 located in the walls of the hopper 3. The gas-air mixture, passing through the hollow channels 12, enters

the gas distribution tubes 13 and through the radial outlet nozzles 14 are guided by a creeping stream to the inner part of the walls 3 of the furnace 2. Thus, the walls 3 are cooled, the heat of the walls 3 is returned to the combustion chamber 2, in addition, the walls 2 of the furnace are protected from melting.

Claims (1)

SUMMARY OF THE INVENTION A boiler containing a furnace, on the walls of which there are burners, a convective gas duct and a mixing air heater, connected by nozzles of the exhaust gas mixture and air supply, respectively, to the burners and through the blower fan, are characterized in that, in order to increase efficiency and reliability , in the walls of the furnace above the burners hollow channels are made, equipped with gas distribution tubes with radial exhaust nozzles, and a mixing air inlet is connected to these Alami additional nozzle outlet gas mixture with a convection flue and supplying nozzles 0 flue gas through the exhaust fan. Aa Figure 2.