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U-shaped tube high pressure heater for nuclear power generating unit

A technology for high-pressure heaters and nuclear power units, applied in the direction of feed water heaters, heat exchanger types, indirect heat exchangers, etc., can solve problems such as vibration damage, affecting equipment safety, and tube bundle erosion, achieving small deformation and ensuring Welding performance, the effect of quality assurance

Inactive Publication Date: 2010-09-22
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to provide a U-shaped tubular high-pressure heater for nuclear power units to overcome the erosion and vibration damage to the tube bundle caused by the large-capacity wet saturated steam of the nuclear power unit flowing rapidly in the tube bundle, which seriously affects the safety of the equipment. security issues

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  • U-shaped tube high pressure heater for nuclear power generating unit
  • U-shaped tube high pressure heater for nuclear power generating unit

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Embodiment 1

[0010] Such as figure 1 As shown, it is a structural schematic diagram of a U-shaped tube high-pressure heater for a nuclear power unit. The U-shaped tubular high-pressure heater for nuclear power units includes a cylindrical housing 8, the side wall of the housing 8 is provided with a steam inlet pipe 5 and an upper-level drain inlet pipe 9, and one end of the housing 8 is provided with a hemispherical water chamber 2. The hemispherical water chamber 2 is provided with a self-sealing manhole 1 and a water supply inlet and outlet pipe 3. The shell 8 is divided into a condensation section 7 and a hydrophobic cooling section 10, a heat exchange tube 6 in the condensation section and a heat exchange tube in the hydrophobic cooling section. 11 are located in the condensation section 7 and the hydrophobic cooling section 10 respectively. The hemispherical water chamber 2 is connected to the heat exchange tube 6 of the condensation section and one end of the heat exchange tube 11 of...

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Abstract

The invention provides a U-shaped tube high pressure heater for nuclear power generating units, which comprises a condensing section heat exchange pipe and a hydrophobic cooling section heat exchange pipe, and is characterized in that both the condensing section heat exchange pipe and the hydrophobic cooling section heat exchange pipe are of SA803TP439 ferritic stainless steel seam pipes. The invention has the following beneficial effects that: the SA803TP439 ferritic stainless steel seam pipes are used as high pressure heat exchange pipes, so that the problems of the strength and erosion resistance of the pipes are better solved, and the service life of the heat exchange pipes is greatly prolonged.

Description

technical field [0001] The invention relates to a U-shaped tube type high-pressure heater for a nuclear power unit, belonging to the technical field of high-pressure heaters. Background technique [0002] The high-pressure feed water heater is a device that uses the extraction steam of the steam turbine to heat the feed water. It can improve the thermal efficiency of the power plant, save fuel, and contribute to the safe operation of the unit. The water inside and outside the heat exchange tube of the high-pressure heater is the condensed water of boiler feed water and steam extraction. The water quality is alkaline and has a passivation effect. A passivation film will be formed on the surface of the carbon steel heat exchange tube. Improve the corrosion resistance of the material. This is also the reason why carbon steel pipes can be used as pipes for high-pressure feed water heaters. The heat exchange tubes of the early stage are mainly made of carbon steel, and the carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22D1/32F28F21/08
CPCF28F21/083F28D7/06
Inventor 牛序娟虞佶顾琼彦
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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