SU1384877A1 - Boiler - Google Patents

Abstract

The invention relates to energy and m. used as a heat generator in agro industrial plants for supplying heat to livestock farms and agricultural complexes. The purpose of the invention is to increase the efficiency and reliability of the boiler. For this, an additional overflow collector 6 is included in the path of the heated medium between the worn screens 4 and the convective sections 5 of the heating surface. Zigzag pipes of one group are inserted between pipes of another, the entire width of the duct 1 is made by the IA and installed in the last one with a transverse pitch equal to their diameter. Such a boiler design reduces heat loss to the environment, cools the flue gases more completely and reduces the likelihood of pipe bursting. 1 il. (O (L W tS: s 00 4 00

Description

The invention relates to power engineering and can be used as a heat generator for irrigation of agricultural industry for supplying livestock farms and agricultural complexes with heat.

The purpose of the invention is to increase the efficiency and reliability of the boiler by reducing heat loss to the environment, more fully cooling the flue gases and reducing the heat and hydraulic sweep in the heating surface pipes.

The drawing shows schematically the boiler, a general view.

The boiler contains a vertical flue 1 with a heating surface of the pipes included in the path of the heated medium through the distributing bottom and collecting the upper collectors 2 and 3, respectively. The heating surface is made in the form of lower wall chambers 4 and upper convective sections 5. The sections 5 of the heating surface are formed oppositely located by groups of zigzag pipes, directed by bends opposite to the bends of another group. The boiler contains a bypass manifold 6 included in the path of the heated medium between the wall screens 4 and the convective sections 5 of the heating surface. The zigzag pipes of one group are inserted between the pipes of the other, are made for the entire width of the duct 1 and are installed in the last with a transverse pitch equal to their diameter.

The path of the heated medium includes evaporator tubes 7 placed in the evaporator 8 and connected to the collectors 2 and 3. The evaporator tubes 7, screens 4 and convective portions 5 form the circulation loop of the natural circulation of the heated medium equipped with a means of indirect pressure control and regulation. , sleeves 9 and 10 welded to the collector 3 for thermocouples.

Under the flue 1 there is a pre-flue 1 with a burner 12, and in the upper part of the flue 1 there is a heat exchange package 13 of pipes for heating water or air of an outside consumer.

The evaporator 8 is made of two semi-shells, one of which passes evaporator tubes 7, and provides

g

YU

15

20 25 30 j

0

0

The supply lines 14, 15, the safety valve 16 and the water-metering column 17. The boiler is connected to the evaporator 8 in one portable unit by collectors 2 and 3. The collector 3 and 6 are connected by an upper tubular screen 18.

The boiler works as follows.

Due to the heat of the combustion products in the heating surface condensate evaporation occurs. The resulting steam enters the evaporator tubes 7, where it condenses, giving off heat to the heated medium of the evaporator 8. The condensate obtained through the collector 2 is returned to the heating surface of the boiler, and the steam formed in the evaporator 8 is sent to the consumer.

In the collector 6, the heated medium of the boiler exiting the screens 4 is mixed. This allows to significantly reduce the thermal-hydraulic sweep of the heated medium in the heating surface, which reduces the likelihood of the pipes being burned out.

The set pressure ijapa in the circulation circuit of the boiler is controlled by a thermocouple installed in the sleeve 9 and is automatically controlled by changing the water level in the evaporator 8. As a result, the formation of scale on the outer surface of the evaporation tubes 7 does not affect the heat perception from the combustion products heating the boiler. In order to prevent the possibility of increasing the vapor pressure in the circulation circuit of the boiler above the permissible value, a thermocouple with a sleeve 10 is provided, at the signal of which the fuel supply to the burner 12 is turned off.

Due to its tightness, the constant mass composition of the condensate poured into it is maintained in the circulation circuit of the boiler, which makes it possible to operate the heating surface of the boiler in a non-boiling state and significantly increases the service life of the boiler.

Claims (1)

Formula of the invention. eni A boiler containing a vertical gas duct with a heating surface made of pipes included in the path of the heated medium through the distributing bottom and assembled 3I38A8774 Healing upper collectors, and moreover, efficiency and reliability, he heating surface is made in the form of additional contains bypass the lower wall screens and the upper collector included in the path of the convection sections, the last of the 5th environment between the wall screens which are formed opposite to the positions and convective areas on the surface of the zigzag groups, heating, and zigzag pipes directed by bends of counter pipes of one group are laid between bends of another group, with different pipes u and with the fact that, with the aim of turning the width of the gas duct.