Method for adjusting power of auxiliary electric boiler of nuclear power plant

A power regulation and auxiliary power technology, which is applied in the fields of nuclear power plant auxiliary equipment, factory parameter adjustment, nuclear power generation, etc.

Active Publication Date: 2021-09-14
HUANENG SHANDONG SHIDAO BAY NUCLEAR POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This adjustment method has great safety hazards when the boiler is running at low power
When the boiler is running at low power (less than 20% of rated power), the liquid level of the boiler is at a low level. At this time, most of the graphite electrodes of the boiler

Method used

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  • Method for adjusting power of auxiliary electric boiler of nuclear power plant

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Embodiment

[0030] A method for regulating power of an auxiliary electric boiler in a nuclear power plant, comprising the following steps:

[0031] (1) The boiler is supplied with water to the set operating liquid level of 1500mm, and when the low liquid level is set to 1400mm, the replenishment pump is started in chain to replenish water, and when the operating liquid level is reached to 1500mm, the replenishment pump is stopped in chain; when the high liquid level is set to 1600mm, the boiler sewage is started in chain The valve is discharged, and when the operating liquid level reaches 1500mm, the boiler blowdown valve is closed in chain.

[0032] (2) Start the first boiler water dosing pump, add a conductivity regulator to the boiler, and adjust the conductivity to a range of 20-30 μS / cm; start the second boiler water dosing pump, and add a boiler water pH regulator to the boiler , so that the pH value of the furnace water is in the range of 9.5 to 10.0.

[0033] (3) Start the boiler...

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Abstract

A method for adjusting the power of an auxiliary electric boiler of a nuclear power plant comprises the steps that the operation liquid level of the boiler is set, and a first boiler water dosing pump and a second boiler water dosing pump are started to adjust the conductivity and the pH value of the boiler; the boiler is started to operate, the boiler water liquid level of the boiler is kept at the operation liquid level, and the pH value and conductivity of the boiler water are monitored; the liquid level of the boiler is kept constant, the output power of the boiler is adjusted by adjusting the boiler water conductivity of the boiler, when the boiler water conductivity is improved, the boiler power is improved, and when the boiler water conductivity is reduced, the boiler power is reduced; and when shutdown is needed, the boiler conductivity is adjusted to be reduced to the shutdown conductivity, the boiler blow-down valve and the boiler water replenishing valve are closed, and the boiler is shut down. The graphite electrode of the boiler is immersed in boiler water, the dry burning phenomenon is avoided, loss of the graphite electrode and falling of graphite powder are reduced, the service life of the electrode is prolonged, and safe, economical and stable operation of the boiler is guaranteed.

Description

technical field [0001] The invention relates to the technical field of water chemistry in a high-temperature gas-cooled reactor nuclear power plant, in particular to a method for regulating the power of an auxiliary electric boiler in a nuclear power plant. Background technique [0002] The nuclear power plant is equipped with an auxiliary electric boiler system, which uses a high-voltage electrode boiler to meet the needs of unit startup and emergency shutdown. The load of the high-voltage electrode boiler is related to the boiler liquid level and the conductivity of the furnace water. The higher the boiler liquid level and the higher the conductivity, the greater the power of the electric boiler. Conversely, the lower the power of the electric boiler. [0003] The regulation of electric boiler power in nuclear power plants adopts the constant conductivity mode, that is, to keep the conductivity constant, and adjust the output power of the boiler by adjusting the level of t...

Claims

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Application Information

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IPC IPC(8): G21D3/08G21D1/02
CPCG21D3/08G21D1/02Y02E30/00
Inventor 韩成
Owner HUANENG SHANDONG SHIDAO BAY NUCLEAR POWER CO LTD
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