Preheater applied to liquid state lead bismuth alloy experimental loop

A liquid lead-bismuth alloy and experimental circuit technology, applied in water heaters, fluid heaters, metal processing equipment, etc., can solve the problems of increased shell tube volume, seal failure, and high filling cost of liquid lead-bismuth alloy

Active Publication Date: 2012-08-15
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the low density of sodium (less dense than water) and relatively low cost, this heating method is very suitable for the experimental circuit of liquid metal sodium, while the density of liquid lead-bismuth alloy is relatively high (about 10 times that of water), if the above The heating method described in the patent requires a larger heat exchange area under the same temperature rise and volume flow rate, and the volume of the shell and tube increases accordingly, and the filling cost of the liquid lead-bismuth alloy is relatively high
In addition, seal failure due to thermal expansion and contraction is also a potential problem during long-term repeated operation

Method used

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  • Preheater applied to liquid state lead bismuth alloy experimental loop
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  • Preheater applied to liquid state lead bismuth alloy experimental loop

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Embodiment Construction

[0032] The preheater used in the liquid lead-bismuth alloy experimental circuit of the present invention comprises: a material pipeline, a material inlet, a material outlet, an electric heating layer, an insulating layer and a metal protective shell. When the preheater of the present invention is installed, the whole preheater is placed at a certain angle with the horizontal plane, the preferred value of the inclination angle α is 5° to 90°, the material inlet is set at a low position, the material outlet is set at a high position, and the material inlet and material The included angle of the projection of the outlet on the horizontal plane can be any angle. The material inlet and outlet are connected to the main pipeline of the experimental circuit by welding, and the material and nominal diameter of the material pipeline are the same as the main pipeline of the experimental circuit.

[0033] In the preheater of the present invention, a temperature sensor is arranged on the o...

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Abstract

The invention relates to a preheater applied to a liquid state lead bismuth alloy experimental loop. The preheater mainly comprises a material pipeline and an electrical heating layer covering the outer side of the material pipeline, wherein the material pipeline is provided with a material inlet and a material outlet; an insulating layer covers the outer side of the electrical heating layer, and the outer side of the insulating layer is a metal protection shell; and the preheater is arranged in a way of forming an inclination angle with a horizontal plane, the material inlet is arranged in a low position, and the material outlet is arranged in a high position. The preheater provided by the invention can carry out great temperature rise preheating on liquid state lead bismuth alloy, the temperature rising level can achieve 200 DEG C, no sealing measure is needed, and the change of a heating element can be realized without the evacuated liquid state lead bismuth alloy.

Description

technical field [0001] The invention belongs to the technical field of heating, in particular to a preheater applied to a liquid lead-bismuth alloy experimental circuit. Background technique [0002] Liquid lead-bismuth alloy (LBE, lead-bismuth eutectic) has good neutronics performance, excellent radiation resistance performance, heat transfer performance and safety characteristics, and is very suitable as a coolant for ADS (accelerator-driven subcritical system) And spallation target material, not only can prolong the life of the target system, but also can improve the safety of the subcritical reactor. At present, liquid lead-bismuth alloy has not only become the material of choice for spallation target and coolant in ADS design, but also an important candidate material for advanced fast neutron reactor coolant. [0003] Due to the special properties of liquid lead-bismuth alloy, it is necessary to conduct systematic and in-depth research on its flow and heat transfer cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H1/14F24H9/20B22D41/015
Inventor 蔡军李勋锋淮秀兰郭江峰陶毓伽
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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