SU1328563A1 - Thermal power station - Google Patents

Abstract

This invention relates to heat and power engineering. It improves the quality of water deaeration and the efficiency of the power plant. The return network water coming through the pipeline (TP) 12 is heated successively in the built-in bundle 15 of the condenser 16, the upper and lower network heaters (SP) 8 and 10 of the turbine2 and further along / / 6 3 t 7 i TP 11 direct network water goes to the heating system. Water leaks from the latter are replenished by make-up water (DF) prepared in a vacuum deaerator 13. The source water is heated in the built-in bundle 15 of the condenser 16 and the lower SP 7 of the turbine 1. The heating medium for the deaerator 13 is taken from the lower SP 8 of the turbine 2 and is heated in the upper SP 9 of the turbine 1. When t-reverse network water exceeds the PV temperature, the latter is supplied to TP 12, and when seasonally lowering the return network water temperature relative to the TV temperature the latter is produced in path 20 between SP 8 and 10. In the honors the heating medium to the deaerator 13 m. b. used part of the PV, taken from TP 21 and entering before deaeration for heating in SP 9 according to TP 19. 3 Cp. f-crystals, 2 ill. & (L 13 00 th 00 SP 05 with 12 ig. I

Description

The invention relates to the field of power engineering and can be used in thermal power plants (TPP).

The aim of the invention is to improve the quality of water deaeration and increase the efficiency of the power plant.

FIG. 1 is a schematic diagram of a thermal power plant; in fig. 2 - the basic scheme of thermal power plants with the connection of the upper mains heater to the pipeline of submarine water supply.

The TPP contains at least two steam turbines 1 and 2 with 3, 4 and 5, 6 pairs of lower and upper heat extraction, connected respectively to the lower

The medium for the vacuum deaerator 13 is withdrawn from the network water path 20 behind the lower network heater 8 of the turbine 2 and heated in the upper network heated 5 of the turbine body 1. The temperature of the source water and the heating medium is kept constant throughout the year regardless of the outside air temperature, therefore the pressure in selections 3 and 5 and in general, the mode of operation of the turbine 1 does not undergo significant seasonal changes. At the return network water temperature above the make-up water temperature, the make-up water is supplied to the pipeline 12 o inverse mains water, and with seasonal lowered temperaverhnim network preheater 7 m, 8 - tours return water with respect

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and 9, 10. The lower and upper network heaters 8 and 10 are connected to pipelines 11 and 12 of the forward and reverse network water. The vacuum deaerator 13 of the make-up water is connected to the source water pipeline 14, which includes the counter beam 15 of the condenser 16 of the turbine 1, the lower mains heater 7 of the turbine 1, the chemical water cleaning 17, the calciner 18, and the heating network 19 that includes the upper mains turbine heater 9 1. The heating medium pipe 19 is connected to the supply water path 20 between the lower and upper heaters 8 and 10 of the turbine 2, and the make-up water supply pipe 21 is connected to the return pipe 12 through the stop valves 22 and 23 tevoy water and delivery water path 20 between the preheater E 8 and 10. The number of turbines 1 and 2, the entrance plih in TPP depends on the thermal load required for heating the raw water before the vacuum heating medium diaeratorami 13 and mains water. The chemical water treatment 17 and calciner 18 can be switched on to the lower mains heater 7. The heating medium pipe 19 can be connected to the make-up water supply line 21 (FIG. 2),

make-up water temperatures supplying make-up water is supplied to the network water path 20 between the network heaters 8 and 10 so that the heat of the make-up water does not displace 8 pairs of bottom heat extraction 4 in the network heater 8.

As a heating medium for a vacuum deaerator, make-up water can be used, a part of which from the supply water supply line 21 through the heating medium line 19 is supplied to the upper mains heater 9, where it is heated with steam of the upper heat extraction selection 5 and then enters the vacuum deaerator 13. Effective vacuum the deaeration of the make-up water is maintained by maintaining the pressures in the heat extraction outlets 3 and 5 constant, regardless of the outdoor temperature.

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Claims (4)

1. A heat electric station containing at least two steam turbines with upper and lower heat-extraction steam extraction, connected to the upper and lower network, respectively. Number of steam turbines 1 and 2 at TPPs 40 ohm heaters, vacuum deaerator depends on the thermal loads required to heat the network water and coolants for the vacuum deaerator 13. TPP works as follows. The return network water coming through the pipeline 12 is heated successively in the embedded beam 15 of the condenser 16, the lower and upper heaters 8 and 10 of the turbine 2 and further along the pipeline 11 of the direct supply water towards 45 make-up water with source water pipelines, heating medium and make-up water supply, the latter of which is connected to the return network line return pipe of the network water path, characterized in that, in order to increase the economy and quality of make-up water deaeration, one of the lower and upper heaters turbines on the heated medium are included respectively in the pipeline of the source water and in It is placed in the heating system (not shown). Tempe - CQ pipeline heating environment The network of water supply and pressure in the heat extraction outlets 4 and 6 vary according to the change in the outdoor temperature. Water leaks from the heating system are replenished by make-up water prepared in a chemical water treatment 17, a decarbator 18 and a vacuum deaerator 13. The source water is heated in the built-in beam 15 of the condenser 16 and the lower network heater 7 of the turbine 1. Gray 55 2. Station according to claim 1, characterized in that the pipeline is greyush, the vacuum deaerator medium is connected to the network water path between the lower and upper heaters of the other turbine. 3. The station according to claim 1, wherein the feed water supply line is additionally connected to the network water path between the upper and lower network heaters of the other turbine. The medium for the vacuum deaerator 13 is withdrawn from the network water path 20 behind the lower network heater 8 of the turbine 2 and heated in the upper network heater 9 of the turbine 1. The temperature of the source water and the heating medium is kept constant throughout the year regardless of the outside air temperature, therefore the pressure in There are no significant seasonal changes in the selections 3 and 5 and, in general, the mode of operation of the turbine 1. At the return network water temperature above the make-up water temperature, the make-up water is supplied to the pipeline 12 network water, and when seasonal temperate - Make-up water temperatures The supply of make-up water is produced in the network water path 20 between the network heaters 8 and 10 so that the heat of the make-up water does not displace 8 pairs of bottom heat extraction in the network heater 8. As a heating medium for a vacuum deaerator, make-up water can be used, a part of which from the supply water supply line 21 through the heating medium line 19 is supplied to the upper mains heater 9, where it is heated with steam of the upper heat extraction selection 5 and then enters the vacuum deaerator 13. Effective vacuum the deaeration of the make-up water is maintained by maintaining the pressures in the heat extraction outlets 3 and 5 constant, regardless of the outdoor temperature. -h- 35 Invention Formula 1. Heat electric station containing at least two steam turbines with upper and lower heat-extraction steam extraction, connected respectively to the upper and lower network 5 make-up water with source water pipelines, heating medium and make-up water supply, the latter of which is connected to the return network line return pipe of the network water path, characterized in that, in order to increase the economy and quality of make-up water deaeration, one of the lower and upper heaters turbines on the heated medium are included respectively in the pipeline of the source water and in heating pipeline 2. The station according to claim 1, characterized in that the pipeline is greyush, the vacuum eaerator medium is connected to the network water path between the lower and upper heaters of the other turbine. 3. The station according to claim 1, wherein the feed water supply line is additionally connected to the network water path between the upper and lower network heaters of the other turbine. 1328563 34 4. The station according to claim 1, wherein the deaerator is connected to the pipeline, supplying the pipeline of the heating medium of vacuum or make-up water. ig.2