Method and system for generating power jointly by nuclear fuel and fossil fuel

A fossil fuel and combined power generation technology, applied in nuclear power generation, nuclear power plants, nuclear engineering, etc., can solve the problems that limit the power generation efficiency and economic benefits of nuclear power plants, low power generation efficiency, and small steam enthalpy drop, etc., to achieve high energy utilization Efficiency and economic benefits, lower power generation costs, and simple structure

Inactive Publication Date: 2011-09-07
上海宁松热能环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The use of saturated steam or slightly superheated steam for power generation has the disadvantages of small steam enthalpy drop, low power generation efficiency, large size of steam turbine, and high cost of steam turbine. The use of saturated steam or slightly superheated steam for power generation limits the improvement of power generation efficiency and economic benefits of nuclear power plants.

Method used

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  • Method and system for generating power jointly by nuclear fuel and fossil fuel
  • Method and system for generating power jointly by nuclear fuel and fossil fuel
  • Method and system for generating power jointly by nuclear fuel and fossil fuel

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Embodiment 1

[0051] image 3 Schematically shows the working principle diagram of the combined power generation system 300 including the pressurized water reactor type nuclear steam supply system and the steam superheating furnace burning fossil fuels according to Embodiment 1 of the present invention.

[0052]The combined power generation system 300 includes at least a pressurized water reactor 301, a reactor coolant system, also called a primary loop, and a steam and power conversion system, also called a secondary loop. In the context of the present invention, as known to those skilled in the art, the reactor, reactor coolant system and its auxiliary systems are collectively referred to as a nuclear steam supply system. The reactor coolant in the primary circuit enters the core of the pressurized water reactor 301 under the drive of the reactor coolant pump 304, absorbs the heat energy released by nuclear fission in the pressurized water reactor, enters the steam generator 303, passes t...

Embodiment 2

[0055] Figure 4 It schematically shows the working principle diagram of the PWR nuclear fuel and fossil fuel combined power generation system 400 according to Embodiment 2 of the present invention.

[0056] Figure 4 The China United Power Generation System 400 is different from image 3 The combined power generation system 300 shown is that the steam superheating furnace 411 is designed to heat the water in another feedwater circuit to obtain superheated steam while heating the saturated steam or slightly superheated steam from the nuclear steam supply system to obtain superheated steam. Self-produced saturated steam or superheated steam. Except for the steam superheating device 411 , the working principle of the combined power generation system in this embodiment is the same as that of the combined power generation system shown in Embodiment 1.

Embodiment 3

[0058] Figure 5 A schematic diagram showing the working principle of the PWR nuclear fuel and fossil fuel combined power generation system 500 according to Embodiment 3 of the present invention.

[0059] Figure 5 The combined power generation system 500 shown uses a steam superheating device 511 to heat saturated steam or slightly superheated steam from a nuclear steam supply system to obtain superheated steam. The steam superheating device 511 includes a plurality of steam superheating furnaces arranged in parallel, such as steam superheating furnaces 512 and 514 . Different from Embodiment 1, this embodiment uses a steam superheating device including multiple steam superheating furnaces arranged in parallel to heat saturated steam or slightly superheated steam. Except for the steam superheating device 511 , the working principle of the combined power generation system in this embodiment is the same as that of the combined power generation system shown in Embodiment 1.

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Abstract

The invention relates to a method and a system for generating power jointly by nuclear fuel and fossil fuel.The method comprises the following steps: using heat released by the fission of nuclear fuel in a reactor to heat water to obtain saturated vapour or slightly superheated steam; heating the saturated vapour or slightly superheated steam into superheated steam by burning fossil fuel; using the superheated steam to drive a steam turbine generator unit to generate power. The system comprises a nuclear steam supply system which uses the heat released by the fission of the nuclear fuel in the reactor to heat water to obtain the saturated vapour or slightly superheated steam, at least one steam superheater, a steam superheating device which is used for heating the saturated vapour or slightly superheated steam into superheated steam by burning the fossil fuel, and a steam turbine generator unit which generate power by using the superheated steam. In the invention, the steam superheater for burning the fossil fuel is integrated in a nuclear fuel power generation system, so that the system has the advantages of high energy utilization ratio, low power generation cost and the like.

Description

technical field [0001] The present invention relates to power generation technology, and more particularly, the present invention relates to a power generation method and system using combined nuclear fuel and fossil fuel for power generation. technical background [0002] A nuclear power plant converts nuclear energy into thermal energy to generate steam for a steam turbine, which then drives a generator to form a power plant that generates commercial electricity. [0003] Due to reasons of safety and economy, many nuclear power plants currently in operation or under construction, such as pressurized water reactors, boiling water reactors, and heavy water reactors, use saturated steam or slightly superheated steam with a superheat of about 20°C to generate electricity, that is, The nuclear fuel undergoes nuclear fission reaction in the nuclear reactor to generate a large amount of heat. Moderator and coolant are used to generate saturated steam or slightly superheated steam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K11/02F01D15/10G21D5/16G21D5/00F22G1/02
CPCY02E30/00
Inventor 敖建军沃开宇屈武第
Owner 上海宁松热能环境工程有限公司
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