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Solar energy assisted coal fired thermal power plant integrated backheating device

A technology for solar heat collection and thermal power plants, which is applied in the field of integrated heat recovery devices for solar-assisted coal-fired thermal power plants, can solve problems such as rising costs, and achieve the effects of high power, low cost, and investment savings

Inactive Publication Date: 2008-09-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

In order to achieve continuous and stable energy supply, a huge heat storage facility must be built, and the cost will also increase significantly

Method used

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  • Solar energy assisted coal fired thermal power plant integrated backheating device

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] exist figure 1 The steam generated by the solar heat collecting steam generator 5 in the middle is input into the heater 1 through the steam outlet valve 7 of the solar heat collecting steam generator from its outlet, and the steam condensed by the heater 1 is drained and passed through the solar heat collecting steam generator at the bottom of the heater 1 The drain valve 2 returns to the drain inlet of the solar collector steam generator 5 to complete a cycle.

[0013] exist figure 1 In the shown embodiment, the solar heat collection steam generator 5 is a trough solar heat collector available on the market, and its maximum heat collection temperature can reach about 400°C, such as SGX-1 or DS-1 of Solargenix in the United States. , Luz's LS-1, LS-2 or LS-3.

[0014] The working principle of this embodiment: when the steam generated by the s...

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Abstract

The invention relates to an integrated regenerative device for a solar auxiliary coal-fired thermal power plant, belonging to the solar heat utilization field. A technical proposal of a combination of a solar heat collecting steam generator and the steam extraction of a steam turbine is adopted in the regenerative device for the coal-fired thermal power plant to solve defects in solar thermal power generation, such as instability and so on. When sunlight is sufficient, part or all of steam extraction of the steam turbine side in a unit regenerative system is closed, and steam generated by the solar heat collecting steam generator is used to replace the steam extraction of the steam turbine side of the regenerative device for heating feedwater; when sunlight is not sufficient, the complementary operation of solar energy and fossil energy can be implemented through adjusting the connection relation between the solar heat collecting steam generator and the prior steam extraction of the steam turbine side. At night or when a solar thermal collector has failure, the prior condition of the thermal power generation before reconstruction can be recovered through switching back to the prior steam extraction of the steam turbine side. Because the steam extraction of the steam turbine side is reduced, the capability for work of the steam turbine is improved, and the coal consumption for power generation can be obviously reduced. The integrated regenerative device can be used for improving a regenerative system of a conventional coal-fired thermal power plant.

Description

technical field [0001] The invention belongs to the field of solar thermal utilization, and relates to an integrated heat recovery device for a solar-assisted coal-fired thermal power plant. Background technique [0002] In my country, thermal power plants, as the main type of power generation, consume more than 50% of the total coal consumption. And the issue of greenhouse gas emissions that cause climate warming makes the task of energy conservation in the thermal power industry of great significance. The thermal power energy-saving measures are mainly divided into two categories: the first category is to gradually replace old small units through the construction of advanced large-capacity units; the second category is to achieve energy conservation through unit transformation. For a large number of active generating units in our country, technological transformation is of greater significance and urgency. [0003] As an inexhaustible and inexhaustible clean energy, solar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B1/00F24J2/07F24S20/20
CPCY02E10/40Y02E20/16
Inventor 杨勇平阎秦候宏娟郭喜燕崔映红杨志平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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