SU777349A1 - Steam generator - Google Patents

Description

one

The invention relates to a power system, in particular, to devices for starting and operating a steam generator at reduced loads at nominal and sliding pressures.

A steam generator with convective and radiation heating surfaces is known, the combustion chamber of which is connected by a rotating chamber to a convective gas flue and is equipped with main and heating burners. This steam generator recirculates gases to the lower part of the furnace and burner devices 1.

A disadvantage of the known steam generators is the impossibility of increasing in start-up mode the temperature of the combustion products in the rotating chamber and the convective flue without superfluous overconsumption of fuel.

Also known is a steam generator containing a shielded furnace equipped with main and kindling burners, connected by a rotating chamber with a convective gas flue 2, provided with main and pilot burners.

A disadvantage of the known device is its low efficiency on start-up modes and when operating at reduced loads.

The aim of the invention is to improve the economy on start-up modes and when operating at reduced loads.

In order to achieve this goal, flameless burners are additionally installed in front of the PTZ chamber in the furnace.

The drawing shows the proposed device, the overall appearance.

The steam generator contains equipped with basic and ignition burners 1 shielded furnace 2, connected by a rotating chamber 3 with a convective flue 4, and in the furnace 2 in front of the camera 3 are installed, flameless burner 5.

The device works as follows.

Claims (2)

When the steam generator starts to melt, the fuel enters the burners 1. The fuel consumption is determined by the amount of steam required to turn the turbine rotor and turn on the turbogenerator in the network. At the same time, the steam temperature may be lower than necessary according to the start condition. The required temperature level is achieved by the inclusion of additional starting flameless burners 5. In a similar way, the firebox operates under understood loads. In both cases, flameless combustion of the fuel in the furnace will be ensured and thereby a local temperature increase is prevented. Claims of the invention: A steam generator containing a shielded furnace equipped with main and pilot burners connected by a rotating chamber with a convective flue, characterized in that, in order to increase the efficiency during start-up modes J sk. 9 and when operating at reduced loads, flameless burners are additionally installed in the fire chamber in front of the turning chamber. Sources of information taken into account during the examination 1.Krol LB and others. Intermediate steam overheating and its regulation in energy blocks, M., “Energie, 1970, fig. 3-8. 2. Krol L. B. Main features of high and supercritical pressure boiler units, M.-L., Gosenergoizdat, 1962, p. 175-177. H h;