SU1219832A1 - Method of warming up system of steam turbine steam inlet - Google Patents

Description

I

The invention relates to a power system and can be used in the operation of steam turbine power plants.

The purpose of the invention is to increase reliability and reduce the duration of the launch.

The drawing schematically shows a device that implements the method of heating the steam turbine steam injection system.

The device contains a steam steam line 1 connected to a remote control valve 2, co-. In combination with a cylinder 3 of high pressure, a steam transfer pipe 4, j and to an external control valve 5 connected to cylinder 3 by at least two parallel connected steam supply pipes 6 and 7. The drainage system has drainage holes 8-10 connected to drain lines 11.

The method of heating the steam turbine steam inlet system is implemented as follows.

Before starting the turbine, in the process of firing the boiler and heating the steam pipelines 1 of the hot steam, the turbine control valves 2 and 5 are left closed. After reaching the initial steam parameters that allow the turbine to start, the control valve 2 is opened smoothly.

Editor O. Golovach

Compiled by S.Kishchenko Tehred A.Aliyev

Order 1308/45

Circulation 500 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035

Branch ShSh Patent, Uzhgorod, st. Project, 4

198322

The sharp steam, the passage through pipe 4 and its heating, enters the cylinder 3 of high pressure. In the process of opening the regulating valve 2, the rotor speed (not shown) increases 5, the pressure in the chamber of the regulating stage of the cylinder 3 rises, and steam returns to parallel connected pipes 6 and 7,

10 heating their sections from the cylinder to the drainage holes 8 and 9. In this case, to ensure the transfer of a part of the steam from one pipe to another (for example, from pipe 6 to pipe 7)

15 in the direction of the closed valve 5, the pressure differential between the drainage orifices 9 and 8 is maintained so that a portion of the steam flows back from the orifice 9 through the pipe 6 to

20 of the valve body of the control valve 5 and further along the pipe running along the pipe 7 to the drainage hole 8, warm up these areas.

In the process of increasing the frequency

25 rotation of the rotor or loading of the turbine opens valve 5, and the fresh steam entering the pipe 6 does not cause the pipe’s lowering sections to heat up sharply from valve 5 to 30 degrees 8 and 9, since these sections are heated up to this moment. unit reliability and shortens the unit start-up time.

Proofreader E. Sirohman

Claims (1)

METHOD FOR HEATING A STEAM TURBINE STEAM SYSTEM equipped with remote control valves, some of which are connected to the high pressure cylinder by at least two parallel bypass pipes, by supplying steam through one group of open valves, while simultaneously heating the bypass pipes behind closed valves by supplying heating steam from the cylinder high pressure in the opposite direction to the worker, and its subsequent discharge through the drainage holes in each of the pipes, characterized in that, for the purpose of increase the reliability and reduce the start-up duration while supplying heating steam in a direction opposite to the operating support _{with a} pressure difference between the drainage holes © adjacent tubes to provide a bypass portion of the steam from a single steam transfer pipe to the other in the direction of the closed control valve. SU, 1219832>