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Steam power generation device, and modification method and operation method thereof

A technology for power generation equipment and steam, which is used in steam generation, mechanical equipment, steam application, etc., and can solve problems such as reducing the efficiency of turbine equipment

Active Publication Date: 2021-01-19
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the steam power plant operates at partial load, the efficiency of the turbine plant (hereinafter referred to as plant efficiency and explained below) decreases.

Method used

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  • Steam power generation device, and modification method and operation method thereof
  • Steam power generation device, and modification method and operation method thereof
  • Steam power generation device, and modification method and operation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] First, a schematic configuration of a steam power plant including a plurality of units described in this embodiment will be described.

[0021] figure 1 It is an explanatory drawing explaining the schematic structure of the steam power plant provided with the several units demonstrated in this Example.

[0022] The steam power generation facility described in this embodiment includes a boiler 1 for generating steam, a high-pressure steam turbine (high-pressure turbine) 2 driven by steam generated by the boiler 1, an intermediate-pressure steam turbine (intermediate-pressure turbine) 3, and a low-pressure steam turbine ( low pressure turbine) 4, condenser 5 to return steam to condensed water, degasser 7 to degas condensed water (remove dissolved gas (such as oxygen) from condensed water) and become feed water.

[0023] In addition, steam discharged from the intermediate-pressure turbine 3 is supplied to the deaerator 7 . This steam becomes feed water.

[0024] The boi...

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Abstract

The invention provides a steam power generation device, and a modification method and operation method thereof. The efficiency of a turbine plant during partial load operation is improved in the entirety of a plurality of units. The steam power generation device comprises a first steam power generation device and a second steam power generation device. Each of the first steam power plant and the second steam power plant is provided with a boiler for generating steam, a high-pressure turbine driven by the steam generated by the boiler, and a first reheat steam system for supplying steam discharged or extracted from the high-pressure turbine to the boiler. A first feed water heater to which a portion of the steam discharged or extracted from the high-pressure turbine is supplied; and a high-pressure extraction steam system to which a portion of the steam discharged or extracted from the high-pressure turbine is supplied to the first feed water heater. The steam power generation device isfurther provided with a steam extraction connection system which connects the high-pressure steam extraction system of the first steam power generation device and the high-pressure steam extraction system of the second steam power generation device.

Description

technical field [0001] The present invention relates to a steam power plant including a plurality of units (steam power plant), a method of remodeling the steam power plant, and a method of operating the steam power plant. Background technique [0002] Opportunities for part-load operation of steam power plants have increased due to the increase in renewable energy sources. However, when the steam power plant operates at partial load, the turbine plant efficiency (hereinafter referred to as plant efficiency and described below) decreases. Therefore, there is a demand for a steam power plant that does not lower plant efficiency even during part-load operation. [0003] As the background art in this technical field, there is Japanese Unexamined Patent Publication No. 8-177409 (Patent Document 1). [0004] Patent Document 1 describes a steam turbine plant (steam power plant) including a plurality of low-pressure turbines that improves plant efficiency during partial load oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/24F01K7/38F01K11/02F01D15/10
CPCF01K7/24F01K7/38F01K11/02F01D15/10F01K7/22F01K7/40F01K13/02F01K23/00F22D1/325F01D17/145F22D1/003F01K7/26F01K7/34F01K7/345F01K17/00
Inventor 田村真吾
Owner MITSUBISHI HEAVY IND LTD
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