SU1344918A1 - Steam heat-utilising circuit of combination power plant - Google Patents

Abstract

This invention relates to a power system. The invention allows to increase the reliability and efficiency of the installation in a wide range of variable modes of operation. Mixer (C) 11 contains a metering nozzle 14, which is connected to the pipeline (TP) 15 to drain the separat from separator 3. Output C 11 is connected to recirculation TP 16 with condenser 6. A valve (K) 18 regulator is installed on the discharge TP 17 of the feed pump 10 torus pitaf V (D oz 4 4 tQ

Description

The control pulse of which is the water level in the 3 K 18 separator is bypass 19 with the jet 20. The circuit is started with the engine 7 running in the range of operating conditions and at any water level in the separator 3. When starting with a large or working position the water level in the separator 3 K 18 is closed, and the water in the economizer moves only along the bypass 19. Water from the separator 3 is discharged into C 11

one

The invention relates to steam heat-lizing circuits of combined power plants, such as ship gas steam turbines.

The aim of the invention is to increase the reliability and efficiency of the installation in a wide range of variable modes of operation.

The drawing shows the scheme of the proposed steam heat recovery circuit) and a gas turbine unit.

Teploutiliziruyuschy steam circuit composed of the recycling of the steam generator 1 comprising an economizer, an evaporator 2, the separator 3 and the steam superheater 4, the steam turbine 5 with a capacitor 6 is set to heat recovery steam generator for a gas turbine engine exhaust nozzle 7. Condensate line 8 and 9 comprises a condensate water pump 10, a nutrient, the mixer 11 is separate and condensate, warm box 12, connected by pipe 13 to the outlet of the mixer 11. Mixer 11 contains a metering nozzle 14, which is connected to the pipeline 15 CL The willow is separated from the separator 3. The outlet of the mixer 11 is connected by a recirculation pipe 16 to a condenser 6. On the pressure pipe 17 of the feed pump 10, a valve 18 for the power regulator is installed, the control pulse of which is the water level in the separator 3. The valve 18 for the power regulator has bypass 19 with a jet 20. 20. A recirculation pipe 16 is installed

due to the pressure drop between the latter. At the same time, K 18 opens, providing the necessary feedwater flow equal to the sum of the steam generating capacity of the steam generator and the flow rate of the separat through i nozzle 14. At the set and discharge of power, K 18 changes the flow of feed water. The constant set point t-ru last at the entrance to the pump 10 is supported by bypassing it over the TP 16 to the capacitor 6, 1 Cp. f-ly, 1 ml.

control valve 21, for example a; z.

Steam heat utilizing circuit of a gas-steam turbine plant is working

in the following way. I

Run the heat recovery loop

carried out with the engine running 7 in the range of operating

0 modes and at any water level in the separator 3. When starting up with the water level in the separator below the operating pressure, the valve 18 of the power regulator is open and the feed water is fed to the economizer 1 by the feed pump 10.

When starting with a large or working position of the water level in the separator 3, the valve 18- of the supply regulator is closed and water in the economizer 1 initially flows only along the bypass 19. At the same time, the feed water flow, limited by the nozzle 20, is less than the steam generator capacity,

5 but sufficient to create a pressure above atmospheric. Due to the pressure differential between the separator 3 and the mixer 11, the water from the separator is discharged into the mixer 11 and

Level 0 in the separator decreases to the working position. In this case, the valve 18 of the supply regulator opens, ensuring the necessary flow of feed water equal to the sum of the steam generator (1 of the steam generator and the separate flow through the dosing nozzle 14, the flow rate KOTopoi o determines the ratio of circulation in the steam generator, and condensation5

3134

This provides the feedwater temperature at the time of feeding the feed pump 10.

The feed pump 10 ensures a steady start of the steam generator, even when the economizer operation mode is boiling, which takes place on the dry steam generator starts with the engine 7 running,

When recruiting and resetting the power, the steam capacity, the vapor pressure, the flow rate of the separat, its temperature and the level in the separator 3 change. In this case, the valve 18 of the power regulator changes the flow rate of the feed water in accordance with the change in steam production and the flow rate of the separat through the dosing nozzle 14.

Changing the parameters leads to a deviation of the temperature of the feed water before the feed pump 10 from a predetermined value. In this case, the control valve 21 from the control pulse on the feedwater temperature at the inlet to the feed pump 10 increases or decreases the bypass of the heated feed water through the recirculation pipe 16 to the condenser 6. When the feed water temperature rises above the set value, bypass it to the condenser 6 is increased, in the condenser 6 it is cooled to the temperature of the condensate and, mixing with the condensate, enters the mixer 11, the temperature of the feed water entering the feed pump 10 is reduced to a predetermined value.

As the feed water temperature in front of the feed pump decreases, the flow rate of the bypass decreases and the feed water temperature rises to the set value. In this way, a constant preset feedwater temperature at the inlet to the feed pump 10 is maintained. The feed water temperature is set such as to ensure the cavitational operation of the feed pump 10.

,

Compiled by V.Zamulayev Editor T, Parfenova Tehred L, Serdyukova Proofreader I. Muska

Order 4900/34 Circulation 481 Subscription

VNIIPY USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5

Production and printing company, Uzhgorod, st. Project, 4

IQ | ,,. 25 о, „р

35

40

45

184

and protect zgogumayzer 1 from sulfur corrosion.

Transferred to the condenser 6, the feed water heated in the mixer 11 can be used to deaerate the condensate in the condenser 6,

For stationary single-mode gas-steam turbine installations, for example, for gas pumping, the steam heat-utilizing circuit can be performed with manual adjustment of feedwater temperature by valve 21. Adjustment for stationary installations is necessary only during the installation and period adjustment period.

Claims (1)

Invention Formula 1, A steam heat recovery loop of a combined power plant containing a utilization steam generator with an economizer and a steam separator with a separate drain pipe, a feed pump connected by a pipe with a supply valve to the steam generator economizer, a mixer located on the condensate path, the outlet and the mixer input are connected to a feed pump suction line and to a condensate pump pressure line, a steam turbine with a condenser, characterized in that , in order to improve efficiency and reliability, the mixer is equipped with a metering nozzle placed on the separate drain pipe, and the condensate path is equipped with a recirculation pipe with a control valve controlled by the water temperature at the inlet to the feed pump and connected to capacitor i 2, the circuit in accordance with claim 1, in accordance with paragraph 2, so that, in order to increase the reliability of the circuit in the start-up mode, the supply valve is equipped with a bypass with a jet.