SU1404662A1 - Steam-turbine plant - Google Patents

Abstract

The invention relates to a power system and improves the efficiency of the installation at partial loads. Ejectors 24 and 25 are placed on the regenerative extraction pipelines 3 and 4 in front of the heating stages 20 and 22 and are connected to the extraction lines 4 and 6 of lower potential through the ejected medium through the shut-off valves 45 and 42. The water outlets of steps 20 and 22 are connected by jumpers 27 and 28 with shutoff valves 34 and 37 to the inlet of steps 21 and 23 of another heating line. This embodiment makes it possible to use lower parameters for heating the steam feed water during the period of partial loads of the steam turbine plant. 1 il.

Description

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This invention relates to a power system, in particular to steam turbines.

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41,42,44 and 45 is open, and valves 32,35,36,39,40 and 43 are open.

With an increase in feedwater flow rate to a value exceeding the throughput capacity of a double-flow high-pressure preheater, the shut-off valves 32,35,36,39,40 and 43 are open, and the shut-off valves 33,34, 37,38,41,42,44 and 45 are open and steam turbine installation work in a known pattern.

installations with a multithreaded regeneration system.

The aim of the invention is to increase the efficiency with partial loads.

The drawing shows a steam turbine plant comprising a steam generator 1, a turbine 2 with regenerative selections 3–11 steam, an electric generator 12, a condenser 13, a condensate pump 14, regenerative heaters 15, a deaerator 16, a nutrient pump J5 17, steps 18–23 of a regenerative double flow a high pressure preheater to ejectors 24 and 25. The installation contains jumpers 26-29,

pipelines 30-31 of steam supply and for-2 ° installation, waste valves 32-45,

The installation works as follows.

At partial loads of a steam-turbine plant, the main steam flow 25 turbine with regene pipelines from the steam generator 1 enters the steam extraction plant connected to bin 2 and expands in it, does work and generates electric power, while part of the main flow steam through selections 3 -11 enters jn to low-pressure regenerative heaters 15, deaerator 16 and stages 18-23 of a regenerative double-flow heater, where condensation heats feed water and main condensate. In this case, stages 18 and 19 of the preheater are disconnected in the heating pair from the selection of 5 turbines. The feed water after deaerator 16 and stages 18 and 19 of the preheater successively passes through stages 20-23 through bridges 26-29. Part of the steam from selections 3 and 4 directly enters the stages through pipelines 30 and 31, and another part of the e-ejected medium through the shut-off valve enters the ejectors 24 and 25, where the armature to the extraction pipeline is more

35

40

The invention will improve the efficiency of the installation by using lower parameters for heating the feed water during the period of partial loads of steam turbines.

Claims (1)

The invention includes a steam and turbine unit containing high and low pressure heaters, at least one of which is multi-threaded with water, at least two lines, each of which contains at least two successive heating stages, while the heating stages of the heater lines are connected parallel to the pipelines of the regenerative extraction of steam of the corresponding potential, characterized in that, in order to increase efficiency on partial loads, the installation is equipped with at least one Ktorov placed on one of the steps of heating one of the selection lines regenerative preheater vapor pipe and connected by 41,42,44 and 45 is open, and valves 32,35,36,39,40 and 43 are open. With an increase in feedwater flow rate to a value exceeding the throughput capacity of a double-flow high-pressure preheater, the shut-off valves 32,35,36,39,40 and 43 are open, and the shut-off valves 33,34, 37,38,41,42,44 and 45 are open and steam turbine installation work in a known pattern. ° th installation The invention will improve the efficiency of the installation by using lower parameters for heating steam feedwater during partial load steam turbines. A turbine with regenerative steam extraction pipelines connected to the ejection medium through the valves to the extraction pipeline Claims of the invention: A steam turbine plant containing a turbine with regenerative steam extraction pipelines connected to the ejection medium through a shut-off valve to the extraction pipeline more high and low pressure preheaters, at least one of which is multi-threaded in water, with at least two lines, each of which contains at least two successive heating stages, while the heating stages of the preheater lines are connected in parallel to the regenerative selection pipelines a pair of corresponding potential, which is different in that, in order to increase efficiency on partial loads, the installation is equipped with at least one ejector placed on the regenerative pipeline steam extraction at one of the heating steps of one of the preheater lines and connected via injects steam from lower parameters 4 and 6, mixes with it, and the resulting mixture is fed to preheater sections 20 and 22. At the same time, the fittings 33,34,37,38 are shut off, VNIIPI Order 3070/34 Random polygons pr-tie, Uzhgorod, st. Design, And low potential, and the water output of this stage is connected by a jumper with valves to the input of the load level of this potential of another heating line. Circulation 492 Subscription