Full-arc admission generator set and water supply bypass regulation method thereof

A full-cycle steam inlet and generator set technology, applied in the control of water supply, steam generation, engine components, etc., can solve the problems of increasing the heat consumption of the unit, increasing the vibration of the steam turbine, and the disturbance of the steam flow, so as to increase the overload power generation capacity and reduce the The effect of throttling losses and increasing safety

Inactive Publication Date: 2014-12-17
CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a frequency adjustment needs to increase the output of the steam turbine, open the supplementary steam valve to throttle part of the new steam and directly introduce it into an intermediate stage of the steam turbine to increase the steam volume, but this will cause a large throttling loss and greatly increase the heat consumption of the unit. Reduce the overall efficiency of the unit, and at the same time, the added steam flow will cause a large disturbance to the steam flow in the cylinder, which will increase the vibration of the steam turbine to a certain extent, and this excessive vibration will endanger the safe operation of the unit

Method used

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  • Full-arc admission generator set and water supply bypass regulation method thereof
  • Full-arc admission generator set and water supply bypass regulation method thereof
  • Full-arc admission generator set and water supply bypass regulation method thereof

Examples

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Embodiment 1

[0023] image 3 An application example of the present invention on a current typical recuperation system with 3-stage high-pressure heaters is shown in . Apparently, the number of high pressure heaters is not limited to 3 in the figure, and may be more than 3. like image 3 As shown, the full-circle steam inlet generator set includes: deaerator, 3 high-pressure heaters connected to the deaerator through the feed water pump, boiler connected to the 3 high-pressure heaters through the feed water pipeline, steam turbine, generator, feed water bypass Frequency modulation regulating valve, main steam shut-off valve, main steam regulating steam valve. Each high-pressure heater is connected with an extraction pipeline. In order to meet the primary frequency regulation requirements of the unit, the feedwater bypass is configured as follows: a feedwater is drawn from the main pipe of the feedwater outlet of the No. 3 high-pressure heater, and then connected to the outlet of the No. ...

Embodiment 2

[0025] Figure 4 Another example of a full-circle intake steam generator set is shown. Apparently, the number of high-pressure heaters is not limited to 4 in the figure, and may be more than 4 or 3. like Figure 4 As shown, the feedwater bypass is configured as follows: In order to meet the primary frequency regulation requirements of the unit, a feedwater is drawn from the main feedwater pipeline between a two-stage high-pressure heater, and connected to the nearest boiler through the feedwater bypass frequency regulation valve On the main feedwater outlet pipe of the high-pressure heater on the side, it is mixed with the main feedwater and then sent to the boiler. When the unit is in normal operation, both the main steam shut-off valve and the main steam regulating valve are fully open to minimize throttling loss; the feedwater bypass frequency modulation regulating valve is fully closed, and all the feedwater flows through the main feedwater main road. High pressure heat...

Embodiment 3

[0027] Figure 5 Another example of a full-circle intake steam generator set is shown. Apparently, the number of high pressure heaters is not limited to 3 in the figure, and may be more than 3. like Figure 5 shown, and image 3 Compared to the example shown in the Figure 5 The full-circle intake steam generator set in the engine also includes an external steam cooler. Figure 5The feedwater bypass is configured as follows: In order to meet the primary frequency regulation requirements of the unit, a feedwater is drawn from the main feedwater pipeline between a two-stage high-pressure heater, and connected to the nearest boiler side through the feedwater bypass frequency regulation valve. On the main feed water outlet pipe of the external steam cooler, it is mixed with the main feed water and sent to the boiler. When the unit is in normal operation, both the main steam shut-off valve and the main steam regulating valve are fully open to minimize throttling loss; the feed...

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Abstract

The invention discloses a full-arc admission generator set and a water supply bypass regulation method of the full-arc admission generator set. The full-arc admission generator set comprises a deaerator, n high-pressure heaters, a boiler, a turbine, a generator, a water supply bypass frequency adjustment regulating valve, a main steam shut-off valve and a main steam adjusting valve, wherein the n high-pressure heaters are respectively connected with the deaerator by a water feed pump, and n is more than or equal to 3; each high-pressure heater is connected with a steam extraction pipeline; the boiler is connected with the n high-pressure heaters by water feed pipes; one end of the water supply bypass frequency adjustment regulating valve is connected with a feed water outlet main pipe of the high-pressure heater closest to the deaerator in the n high-pressure heaters, and the other end of the water supply bypass frequency adjustment regulating valve is connected with a feed water outlet main pipe of the high-pressure heater closest to the boiler in the n high-pressure heaters; the main steam shut-off valve and the main steam adjusting valve are connected between the turbine and the boiler.

Description

technical field [0001] The invention relates to a full-circle steam-inlet generator set, in particular to a full-circle steam-inlet generator set using feedwater bypass frequency modulation technology. Background technique [0002] In order to improve the control level of power quality and grid frequency, quickly eliminate the frequency fluctuations caused by grid load changes, and ensure the safe and economical operation of the grid, the grid generally requires the steam turbine generating units connected to the grid to have the ability of primary frequency regulation, that is, the steam turbine is required The generator set has the ability to increase or decrease a certain amount of output in a short period of time to quickly respond to the drop or rise of the grid frequency. The primary frequency regulation is the static frequency regulation characteristic of the power grid, which means that through the static characteristics of the speed control system of each unit in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D17/10F22D5/34
Inventor 黄家运申松林施刚夜林磊姚君
Owner CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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