SU979660A1 - Steam turbine plant - Google Patents

Description

(54) STEAM TURBINE INSTALLATION

one

The invention relates to a power system and can be used in thermal power plants.

A steam turbine installation is known, comprising a turbine and a network heater with direct and reverse network water mains and a retaining member installed in the latter, which stores hot and cold water tanks. Connected to the backwater network water main, respectively, before and after the retaining member, and between themselves through a water-cooled cooler, the output of which through the cooling medium is connected through a water treatment unit to the make-up water deaerator 1.

The disadvantage of the installation is the small adjustment range of the generated power, which is a consequence of the supply in the basic mode of water from the de-aerator of the heating network recharge to the pipeline.

The aim of the invention is to expand the adjustment range of the power generated.

The goal is achieved by the fact that the installation is equipped with an additional storage tank of hot water connected through the shut-off valves to the direct and return mains supply mains, the latter before and after the retaining member, and the make-up water deaerator is connected to the chilled water storage tank .

The drawing shows a diagram of the steam turbine installation.

The steam turbine plant contains a turbine 1, a network heater 2 from a master, Q l mi 3 and 4 direct and reverse network water and a retaining body 5 installed in line 4 of the reverse network water, storage tanks 6 and 7 of hot and chilled water connected to the main 4 of return network water, respectively, before and after the retaining member 5, and between them through a water-cooled chiller 8, the output of which is connected to the deaerator 10 of the make-up water through the cooling medium. The installation ,,, ka is also provided with an additional storage capacity 11 of hot water connected through valves and valves - valves 12 and 13 to the highway 3 of the direct and highway 4 of the reverse network water, the latter before and after the retaining member 5,

and the deaerator 10 make-up water at the outlet is connected to a storage tank 7 of cooled water.

The installation also contains pumps 14-17 and valves 18-20.

Steam turbine installation works as follows.

In the network heater 2, the selected steam of the turbine 1 heats the network water, which is sent to the consumer via line 3. The hot return network water accumulated during the peak mode in the storage tank 6 is pumped into the water cooler 8, where it heats the raw make-up water and, after cooling, it enters the storage tank 7. The water is heated in the water cooler 8 of the cheese. It goes to the water purification unit 9, and from there to the boilers power supply and to the deaerator 10 of the make-up water, from where it is pumped Muliro vessel 7 chilled water return network.

During the hours of reduced electrical loads (basic mode), valves 18, 20, 12, and 13 are closed, valve 19 is open. The feed of the heat network is supplied by supplying increased electrical loads during peak hours (peak mode) in an additional storage tank 11 of hot water by pump 15 to line 4 of return network water between retaining member B and network heater 2. All hot water is supplied from the consumer and mountains The water used to feed the heat network from the additional storage tank 11 is directed to the grid heater 2. Turbine 1 generates reduced power.

If it is necessary to obtain additional power, the valve 19 is closed, the pump 15 is turned off, the valves 18, 20, 12 and 13 open. The pump 16 is turned on. The hot return water from the line 4 enters the storage tank 6 in the amount necessary to heat the raw water supplied for chemical water treatment for all the time of peak and base modes. The container 6 is filled with hot reverse supply water. The additional storage tank 11 receives hot net water, and the water flow ratio in them is automatically maintained by opening the control valves 12 and 13 so as to ensure the water temperature in the additional storage tank 11 is somewhat lower than the boiling point of water at

atmospheric pressure (about 90 ° C). The flow of water into the tank 11 during the time of the regime is equal to its consumption for feeding the heat network during the time of the basic mode. The cooled water from the tank 7 through the pipeline by the pump 16 is supplied to the trunk 4 of the return network water in an amount equal to the sum of the return network water supply to the accumulator o capacity 6, the hot network water to the additional storage capacity 11 and the required amount of heating network feed. Capacity 7 is emptied. The supply of chilled water in line 4 reverse network water leads to a decrease in temperature before the network heater 2, to increase the flow of steam from the turbine and, consequently, to increase the capacity of the installation.

The invention allows to expand the adjustment range of the generated power of the installation and can be used

for obtaining additional power without heat loss in a cold source, in particular, its use is effective at low-load heat-generating thermal power plants located in power systems deficient in peak and semi-peak power.

Claims (1)

1. USSR author's certificate number 700453, cl. C 02 F 1/00, 1978.