Unlock instant, AI-driven research and patent intelligence for your innovation.

A U-shaped heat exchange tube resistant to high temperature molten salt corrosion

A technology of molten salt corrosion and heat exchange tubes, which is applied in the direction of tubular components, heat exchange equipment, lighting and heating equipment, etc., can solve the problems of poor mechanical properties and corrosion resistance of heat exchange tubes, and achieve strong overall structural performance , Improve product qualification rate, increase thermoplasticity effect

Active Publication Date: 2020-06-12
ZHEJIANG JIULI HI TECH METALS +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the heat exchange tube in this invention patent has the problem of poor mechanical properties and corrosion resistance of the tube body

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A U-shaped heat exchange tube resistant to high temperature molten salt corrosion
  • A U-shaped heat exchange tube resistant to high temperature molten salt corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] combined with figure 1 And 2, a U-shaped heat exchange tube resistant to high temperature molten salt corrosion, including the following components by weight: 16.2% molybdenum, 6% chromium, 3% iron, 0.04% carbon, 0.28% silicon .

[0034] The outer diameter of the U-shaped heat exchange tube is 13.72mm, the wall thickness is 1.65mm, and the bending radius is 2-15 times of the outer diameter.

[0035] The U-shaped heat exchange tube is produced through three steps of hot extrusion, cold rolling and bending. In the hot extrusion step, the tube blank is first heated with a ring furnace, the heating temperature is 950°C, and the heating time is 1.5h , and then heated by an induction furnace, the heating temperature is 1180°C; the intermediate annealing temperature in the cold rolling step is 1120°C, and the final annealing temperature is 1180°C.

[0036] In the bending step, the bending part of the U-shaped heat exchange tube with a bending radius within the range of 2-7 t...

Embodiment 2

[0041] combined with figure 1 And 2, a U-shaped heat exchange tube resistant to high temperature molten salt corrosion, including the following components by weight: 16% molybdenum, 7% chromium, 4% iron, 0.05% carbon, 0.01% copper , 0.2% silicon.

[0042] The outer diameter of the U-shaped heat exchange tube is 15mm, the wall thickness is 2mm, and the bending radius is 2-15 times of the outer diameter.

[0043] The U-shaped heat exchange tube is produced through three steps of hot extrusion, cold rolling and bending. In the hot extrusion step, the tube blank is first heated with a ring furnace, the heating temperature is 1000°C, and the heating time is 2.0h , and then heated by an induction furnace, the heating temperature is 1160°C; the intermediate annealing temperature in the cold rolling step is 1190°C, and the final annealing temperature is 1180°C.

[0044] In the bending step, the bending part of the U-shaped heat exchange tube with a bending radius within the range of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
yield strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of equipment for fused salt nuclear reactors, and particularly relates to a U-shaped heat exchange pipe resistant to high-temperature fused salt corrosion.The effect of effectively preparing the U-shaped heat exchange pipe for a fused salt nuclear reactor is achieved through the specific raw material proportion and a preparation process and selective specific stress relief annealing operation. The U-shaped heat exchange pipe has the advantages that the high-temperature resistance and fused salt corrosion resistance effects are good, the overall preparation process is reasonable and effective, a proper critical value, namely the bending radius is 11 times the outer diameter, of whether stress relief annealing operation is required or not is selected, a U-shaped heat exchange pipe with the bending radius being more than 11 times the outer diameter does not need annealing, energy is saved, and the overall structure performance of the U-shapedheat exchange pipe is excellent.

Description

technical field [0001] The invention belongs to the technical field of equipment for molten salt nuclear reactors, and in particular relates to a U-shaped heat exchange tube resistant to high temperature molten salt corrosion. Background technique [0002] Molten salt nuclear reactor is a main reactor type in the fourth-generation nuclear reactor. It has high safety and fuel utilization rate. It is the key development direction of the nuclear power field in the future. The U-shaped heat exchange tube used in it needs to withstand up to 700 ℃ The design temperature and the strong corrosion of fluorine salt as the heat exchange medium, the existing common U-shaped heat exchange tube material solution is nickel-molybdenum-chromium alloy with high Mo and low Cr. [0003] On the other hand, the above-mentioned nickel-molybdenum-chromium alloys tend to precipitate more Mo-rich phases, which will increase the alloy's resistance to hot and cold deformation, narrow the hot working ra...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/06B21D53/06C22C19/05C22F1/10F28F1/00F28F21/08
CPCB21C37/06B21D53/06C22C19/057C22F1/10F28F1/00F28F21/08
Inventor 王宝顺梁建平佴启亮李志军王曼孙文强涂正平杨晨茅子振吕越
Owner ZHEJIANG JIULI HI TECH METALS