SU1439373A1 - System for process water supply of steam turbine - Google Patents

Abstract

- Invention m. used in cooling systems for condensers with a block circuit for supplying cooling water. The purpose of the invention is to increase the reliability of the system by reducing dynamic loads when it is stopped. Beef 1 by pump 3 is connected through conduit 4 to condenser 7. Condenser 7 is equipped with receiving and drainage chambers (K) 8.9. In the upper part of the K 9 is a pipe with a valve 10 air release. Chambers 8.9 are equipped with check valves 12,13. The pipeline 6 is connected to the valve 12 by the inlet end, and to the outlet end to the valve 10 branch pipe. The valve 10 is equipped with an actuator 14 and is located above the valve 13. The condenser 7 is equipped with a connecting pipe 15, one end connected to the 6 Bbmie pipeline 12, and the other end to pipe 9 is below the valve 13 grams. The pipe 15 is made with a slope to the side 9. Through a 5 K 9 cable, it is connected to a pool of 2.1 Cp. f-ly, 2 ill. (L

Description

/

Riga.1

The invention relates to energy and can be used in the design and operation of cooling systems for condensers with a block circuit for supplying cooling water.

The purpose of the invention is to improve the reliability of the system by reducing the dynamic loads at a standstill,

FIG. 1 is a diagram of a steam turbine technical water supply system; in fig. 2 — node I in FIG. one.

The technical water supply system of the steam turbine contains the lower 1 and upper 2 pools, pump 3, supply 4, drain 5 and connecting 6 pipelines, condenser 7 from the receiving 8 and drain 9 chambers, pipe with an air outlet 10 valve, located in the upper part the drain chamber 9, the starting ejector 11, and the receiving 8 and the drain 9 of the chamber are equipped with check valves 12 and 13 connecting pipe 6 with an inlet end connected to a check valve

12 receiving chamber B, and the inlet chamber to the nozzle of the air exhaust valve 10, the air exhaust valve 10 being provided with an actuator 14 and located above the non-return valve 13 of the discharge chamber 9. The condenser 7 is equipped with a connecting tube 15, one end connected

to the connecting pipe 6 of the check valve 12 of the receiving chamber 8 and the other end to the nozzle of the drain chamber 9 below the check valve

13 in it, the connecting tube 15 being inclined towards the discharge chamber 9.

The steam turbine water supply system works as follows.

Before shutting down the water supply system with the drive unit 14 of the actuator 14, the air outlet valve 10 is opened and atmospheric pressure is established in the connecting pipe 6. The check valve 12 of the receiving chamber is closed due to the pressure of water in the receiving chamber 8 of the condenser 7, and the check valve 13 of the drain chamber 9 is closed by the vacuum in the drain chamber 9. The technical water supply system is disconnected from the network, the pressure in the receiving chamber B drops, and the return

5 0 5

about

.

Q

five

0

five

The valve 12 is opened. The receiving chamber 8 is connected to the atmosphere, and in the drainage chamber 9 there is still a vacuum. Water tends to equalize the pressure in both chambers of the condenser 7. This happens until the atmospheric pressure is transferred from the receiving tube B to the drain 9 of the condenser chamber 7. Through the tube boards of the condenser 7, the vacuum in the drain chamber 9 and the water from the condenser 7 in equal parts merges into the upper 2 and lower 1 pools. Then, the actuator 14 sets the air discharge valve 10 to a position that allows the plate 10 of the air injection valve 10 to freely rise under the action of air pressure in the condenser 7. The installation is ready for start.

The launch is as follows. After the system is turned on, the water from the downstream fills the supply pipe 4 and the condenser 7. The air in the pipe 4 and the condenser 7 opens the air intake valve 10 and exits to the atmosphere. When this valve 12 is closed and the valve 13 is open. When the condenser 7 is filled with water, it may get into the connecting pipe 6. A connecting pipe 15 with a slope serves to remove this water. After the air has been removed from the condenser 7, the air outlet valve 10 closes under its own weight, and a vacuum is established in the condenser 7.

Claims (1)

1. A steam turbine technical water supply system, comprising lower and upper pools, a pump, inlet, drain and interconnecting piping, a condenser with a receiving and drain chambers, a nozzle with an air discharge valve, located in the upper part of the drain chamber, a starting ejector, different that, in order to increase the reliability of the system by reducing the dynamic loads during shutdown, the receiving and drainage chambers are equipped with non-return valves, the connecting pipeline with an inlet end connected to a non-return valve Well receiving chamber, and an output - to pat12 Y fmflfjlfFig .2