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Automatic oxygen control/corrosion device and method in high temperature lead and bismuth melt

A corrosion device, lead-bismuth technology, applied in weather resistance/light resistance/corrosion resistance, temperature control, measuring devices, etc., can solve problems such as low degree of automation, harsh operation and maintenance requirements, and poor device conditions, so as to improve efficiency and guarantee The effect of safe operation and intuitive position

Active Publication Date: 2019-07-26
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing related devices in the world are mainly two types of large-scale experimental circuits and static devices. Although large-scale experimental circuits can realistically simulate the engineering environment, they have complex structures, demanding operation and maintenance requirements, and relatively high failure rates.
Static devices have simple structure, stable operation, and convenient operation, and have potential advantages in oxygen concentration control and sample corrosion evaluation experiments, but most of the devices have simple conditions, single functions, and low automation

Method used

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  • Automatic oxygen control/corrosion device and method in high temperature lead and bismuth melt
  • Automatic oxygen control/corrosion device and method in high temperature lead and bismuth melt
  • Automatic oxygen control/corrosion device and method in high temperature lead and bismuth melt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: see figure 1 , an automatic oxygen control / corrosion device in a high-temperature lead-bismuth melt, comprising a storage tank 1, on which a vacuum system 2, a temperature control system 3, a cooling system 4, an oxygen concentration control system 5, Sample corrosion experiment system 6 and automatic control and data processing system 7.

[0049] The storage tank 1 is a cylindrical high-vacuum airtight container, and the upper cover 1-2 is provided on the tank body 1-1, and the upper cover 1-2 and the tank body 1-1 are sealed with a thinner aluminum wire Circle 1-3, a semi-open tubular muffle furnace external heater 1-5 is provided on the side of the tank body 1-1, and the outside of the furnace body is covered with heat insulating material to ensure that the temperature of the heater continues at 1200°C The case temperature is below 40°C. The bottom of the tank body 1-1 is provided with a high temperature resistant discharge valve 1-4, which facilitates t...

Embodiment 2

[0065] Example 2: see Figure 7 , an automatic oxygen control / corrosion method in a high-temperature lead-bismuth melt, its main feature is that the steps are:

[0066] (a) Open the upper cover of the storage tank, load the lead-bismuth ingot, close the upper cover and seal it;

[0067] (b) Start the vacuum system, and use the vacuum cascade pump group to pump the vacuum in the storage tank to 1×10 -2 Pa;

[0068] (c) Close the vacuum system, and use the air inlet line of the upper cover to fill the tank with high-purity Ar gas;

[0069] (d) Repeat steps (b) and (c) 2-3 times, rinse the storage tank repeatedly, and finally keep the vacuum at 1×10 -2 Pa;

[0070] (e) Start the software and hardware of the temperature control system, cooling system, oxygen concentration control system, sample corrosion experiment system, and automatic control and data processing system;

[0071] (f) Select the oxygen probe calibration, oxygen concentration control or sample corrosion experi...

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Abstract

The invention belongs to the field of devices for controlling oxygen / corrosion for high-temperature lead-bismuth melt in nuclear science, and relates to a device and a method for automatically controlling oxygen corrosion for high-temperature lead-bismuth melt. The device for automatically controlling the oxygen / corrosion for the high-temperature lead-bismuth melt is characterized by comprising a storage tank; a vacuum system, a temperature control system, a cooling system, an oxygen concentration control system, a sample corrosion experiment system and an automatic control and data processing system are arranged on the storage tank. The device and the method have the advantages that the vacuum of 1*100<-2> Pa can be generated by the vacuum system and is matched with a gas inlet pipeline of an upper cover, a tank can be repeatedly washed by the aid of high-purity Ar gas, and accordingly oxidation of lead and bismuth in early running stages and shutdown phases of the device can be effectively relieved; a water jacket is arranged on an upper cover structure, a plurality of layers of heat-insulation plates are arranged below the upper cover structure, the water jacket, the heat-insulation plates and the cooling system are combined with one another, accordingly, influence of heat conduction and heat radiation of the high-temperature lead and bismuth on the upper cover can be effectively relieved, and components of the upper cover can assuredly normally work in safety ranges when the lead-bismuth melt is operated at the high temperatures of 650 DEG C.

Description

technical field [0001] The invention belongs to the field of oxygen / corrosion control devices in high-temperature lead-bismuth melts of nuclear science, and relates to an automatic oxygen / corrosion control device and method in high-temperature lead-bismuth melts. Background technique [0002] Lead-bismuth alloy is the preferred material for spallation target and coolant in accelerator-driven subcritical system (ADS) due to its excellent comprehensive physical and chemical properties. However, its corrosion to structural materials seriously shortens the service life of structural materials. Controlling the oxygen concentration in the lead-bismuth alloy within a certain reasonable range will form a protective oxide layer on the surface of the structural material, which can effectively reduce corrosion; at the same time, it can avoid the decrease in fluidity or even the blockage of the pipeline caused by the precipitation of excessive lead oxide in the lead-bismuth alloy risk....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00G05D11/13G05D23/22
CPCG01N17/00G05D11/131G05D23/22
Inventor 常海龙王志光姚存峰孙建荣张宏鹏李炳生盛彦斌魏孔芳徐瑚珊
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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