SU535435A1 - Device for starting the boiler cottage turbine - Google Patents

Description

one

The invention relates to the field of power engineering and can be used in power units Kotel-turbine, with intermediate steam overheating.

Steam-powered installations are known that contain a boiler unit connected to the turbine with cold and hot steam superheating steam lines, the latter of which are connected to a deaerator connected along the feedwater between the low and high pressure heaters 1.

In known installations, start-up is carried out by draining a certain amount of steam from hot intermediate superheating steam lines to a deaerator and dumping excess steam not consumed by the deaerator to a turbine condenser, which leads to a decrease in the unit operation efficiency during start-up modes.

The purpose of the present invention is to increase the efficiency of the unit on start-up modes by using all the heat of the steam removed from the hot intermediate superheat steam lines.

This is achieved by the fact that in the proposed device the deaerator is connected to a low pressure preheater with an additional steam line with a control valve installed on it.

bia drawing shows the scheme of the proposed device for starting the boiler-turbine unit.

The device for starting the boiler-turbine unit contains a boiler unit 1 with an integrated separator 2, a turbine 3, an intermediate superheater 4, hot steam lines 5 connected by a pipe 6 to a deaerator 7 which is connected to the low pressure heaters 9 by a steam line 8, and in parallel with the heater , along the main condensate line, a heater 10 is installed, to which is connected

The cold air lines 11 and the heated air 12, the last of them are connected to the air heater of the boiler unit 1. The steam pipelines 13 of the fresh steam are connected to the intermediate superheater 4 by the line with the reduction unit 14.

The device works as follows. Before starting the unit, the boiler unit 1 is filled with deaerated water from the deaerator 7 to form a level in the separator 2. The furnace is ignited. After ignition of the furnace into the separator 2 from the boiler unit 1, a steam line starts to flow into the mixture, where it is divided into water and steam, the latter is sent to the superheater of the boiler and through the steam lines 13

fresh steam and reduction unit 14 enters intermediate superheater 4. Pass intermediate superheater 4, steam from hot steam lines 5 through line 6 is directed to deaerator 7. Excess steam

from the deaerator 7 through the steam line 8 is discharged

low pressure heaters 9. The main condensate heated in low pressure heaters 9 enters the heater 10, where it gives off heat to cold air 11, which, when heated, enters the air heater of the boiler 1.

Thus, all the heat of the steam removed from the steam superheating system is used in the cycle, which increases the efficiency of the unit during start-up modes.

Claims (1)

Invention Formula A device for starting the boiler unit - a turbine containing a boiler unit connected with turbines with cold and hot steam lines, swept overheating, the last of which is connected with a deaerator connected along the feed water between low and high pressure regenerative heaters, characterized in that, in order to improve the efficiency of the unit during start-up modes, the deaerator is connected to a low pressure preheater with an additional steam line with a control valve mounted on it. The source of information taken into account during the examination of the application: 1 US Patent No. 3129564, cl. 60-67, 1964 /;