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Multi-shaft combined cycle plant, and control device and operation method thereof

A technology of combined cycle and operation method, which is applied in the direction of mechanical equipment, steam engine device, engine control, etc., and can solve the problems of start-up time consumption, start-up time consumption of 35-70 minutes, and consumption

Active Publication Date: 2017-02-22
MITSUBISHI POWER LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent document 1, for example, when the metal temperature of the first-stage rotor blade in the steam turbine is in a cold state close to normal temperature, the start-up time takes about 260 minutes.
In addition, in the hot state where the metal temperature is close to the rated operation, the starting time takes about 35 to 70 minutes
In addition, in the warm state where the metal temperature is between the cold state and the hot state, the start-up time takes 100 minutes

Method used

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  • Multi-shaft combined cycle plant, and control device and operation method thereof
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  • Multi-shaft combined cycle plant, and control device and operation method thereof

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Experimental program
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no. 1 approach ”

[0046] First, refer to Figure 1 to Figure 6 The first embodiment of the multi-shaft combined cycle plant according to the present invention will be described.

[0047] Such as figure 1 As shown, the multi-shaft combined cycle facility of this embodiment includes a gas turbine 10, a gas turbine generator 17 that generates electricity by driving the gas turbine 10, and a gas turbine generator 17 that electrically connects and disconnects the gas turbine generator 17 and the power system 1. Turbine breaker 18, waste heat recovery boiler 20 that generates steam by using the heat of exhaust gas EG discharged from gas turbine 10, steam turbine 30 driven by steam generated in waste heat recovery boiler 20, steam generated by driving steam turbine 30 The turbine generator 37, the steam turbine breaker 38 for electrically connecting the steam turbine generator 37 with the power system 1 and cutting off, the condenser 34 for turning the steam after driving the steam turbine 30 back in...

no. 2 approach ”

[0099] Next, refer to Figure 9 A second embodiment of the multi-shaft combined cycle plant according to the present invention will be described.

[0100] The multi-shaft combined cycle plant of the present embodiment is a 2on1 type multi-shaft combined cycle plant including two gas turbines 10 , 10 and one steam turbine 30 .

[0101] In this embodiment, a gas turbine generator 17 , a gas turbine circuit breaker 18 , a waste heat recovery boiler 20 , and a chimney 26 are provided for every two gas turbines 10 , 10 .

[0102] The steam outlets of the two waste heat recovery boilers 20 and 20 are both connected to the steam inlet of a steam turbine 30 through the main steam path 21 . A main steam valve 22 is provided in each main steam path 21 . The steam outlet of this steam turbine 30 is connected to the steam inlet of the condenser 34 similarly to the first embodiment. A bypass path 23 branches off from a position upstream of the main steam valve 22 in each of the main ste...

no. 3 approach ”

[0109] Next, refer to Figure 10 A third embodiment of the multi-shaft combined cycle plant according to the present invention will be described.

[0110] The multi-shaft combined cycle plant of this embodiment also includes a gas turbine 10 , a waste heat recovery boiler 20 , and a steam turbine 30 as in the first embodiment. In this embodiment, the gas turbine 10 and the gas turbine generator 17, the steam turbine 30 and the steam turbine generator 37, and the condenser 34 are also the same as those in the first embodiment. In addition, in the present embodiment, the exhaust port of the turbine 12 in the gas turbine 10 is also connected to the chimney 26 through the flue 25 , and the waste heat recovery boiler 20 is installed in the flue 25 . However, in the present embodiment, in the flue 25 , a sub-flue 28 is branched from a position upstream of the waste heat recovery boiler 20 . A sub chimney 29 is connected to this sub flue 28 . The branch part of the secondary flue ...

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Abstract

In a method for operating a multi-shaft combined cycle plant, a low load mode for adjusting the output of the multi-shaft combined cycle plant by adjusting only the output of a gas turbine, and a high load mode in which the output of the multi-shaft combined cycle plant can be adjusted by adjusting the output of both the gas turbine and a steam turbine, are switched according to the required load (S15). In the low load mode, the steam turbine is supplied with steam at a standby flow rate amount at which the steam turbine can maintain a predetermined initial load, and the initial load is imposed on the steam turbine (S21 to 23).

Description

technical field [0001] The present invention relates to a multi-shaft combined cycle facility including a gas turbine, a waste heat recovery boiler that generates steam using exhaust gas from the gas turbine, and a control device for a multi-shaft combined cycle facility that utilizes the steam generated in the waste heat recovery boiler. A steam turbine is driven, and the gas turbine rotor is not mechanically connected to the steam turbine rotor. This application claims priority based on Japanese Patent Application No. 2014-070325 for which it applied in Japan on March 28, 2014, and uses the content here. Background technique [0002] As a large-scale facility including a steam turbine, there is a combined cycle facility including a gas turbine and a waste heat recovery boiler that generates steam from exhaust gas from the gas turbine and sends the steam to the steam turbine. [0003] The combined cycle plant includes a single-shaft combined cycle plant in which a gas turb...

Claims

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Application Information

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IPC IPC(8): F01K23/10F01D17/00F01D17/20F02C9/28F02C9/42
CPCF01K23/101F02C9/28F02C9/42F05D2220/72F05D2260/85F05D2270/114Y02E20/16F01K23/10F01D25/10F01K7/16F01K7/165F01K11/02F01K13/02F02C6/18F05D2220/31F05D2220/32F05D2260/82F05D2260/821
Inventor 松本一成铃木淳平埃尔维奥·卢比奥帕布罗·拉蒂亚卡罗斯·莫拉·丹尼尔
Owner MITSUBISHI POWER LTD
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