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A kind of sintering device of porous surface tube

A technology of porous surface and sintering device, which is applied in the field of sintering device with porous surface, can solve the problems of uneven product quality, poor sealing performance, restricting the sintering of long tubes, etc., so as to shorten the preparation period, improve the bonding strength and uniformity, The effect of improving safety

Inactive Publication Date: 2011-12-14
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing sintering furnaces are not produced for sintered porous surface tubes, and their sealing performance at high temperatures is not good, because hydrogen is used as a protective atmosphere during sintering, and it is very dangerous if it leaks
The constant temperature zone of the furnace is small, and a 1000mm long furnace can only have a 200mm long constant temperature zone, which limits the sintering of long tubes
In addition, the temperature difference in the furnace of the existing equipment is large, and the quality of the sintered product is uneven, some places are over-burned, and some places are under-fired

Method used

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  • A kind of sintering device of porous surface tube
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Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a porous surface tube sintering device, the sintering device includes a horizontal high-temperature furnace tube, the furnace tube is divided into a heating zone and a constant temperature zone, there are two heating zones: heating zone 12, heating zone 11, set in The two ends of the stainless steel furnace tube 1, the constant temperature zone is set between the heating zones, the heating zone is heated by an electric heating device, and the electric heating device includes a resistance wire, a high temperature furnace tube, a PID artificial intelligence temperature control instrument, a K-type thermocouple and High temperature alarm device.

[0026] The hearth of the furnace tube is divided into upper and lower parts: the upper part 4 of the furnace body and the lower part 13 of the furnace body. During the sintering process, the upper and lower parts of the furnace body are connected by buttons 5. After the sintering is completed, the heart...

Embodiment 2

[0033] A sintering device for a porous surface tube, the sintering device includes a horizontal high-temperature furnace tube, a vacuum system, a gas drying and purifying device, a cooling device, and an ignition device. The high-temperature furnace tube is provided with a double heating zone and a constant temperature zone, the constant temperature zone is set between the heating zones, and the heating zone is heated by an electric heating device, which includes a resistance wire, a high-temperature furnace tube, and a PID artificial intelligence temperature control instrument , K-type thermocouple and high temperature alarm device. The hearth of the furnace tube is divided into upper and lower parts. The hearth can be opened for forced cooling. The vacuum pumping system includes a vacuum pump, which is connected to the furnace tube, removes the air in the furnace tube before sintering, and checks the sealing condition at both ends of the furnace tube. The vacuum degree of the...

Embodiment 3

[0036]The utility model relates to a sintering device of a porous surface tube, and the sintering equipment is a split tube type atmosphere protection resistance furnace. It includes two sets of resistance wire heating devices, two sets of gas supply devices, gas purification devices, cooling devices, and ignition devices. The electric heating device includes a resistance wire, a high temperature furnace tube, a PID artificial intelligence temperature control instrument, a K-type thermocouple and a high temperature alarm device. The gas supply device mainly provides a protective atmosphere for the sintering furnace tube, including a nitrogen bottle, a hydrogen bottle, a pressure reducing valve and a gas supply pipeline, and the gas purification device includes a drying tower, a purification tower and a high-pressure alarm device. The cooling device is arranged at both ends of the high-temperature furnace tube, and includes a cooling water inlet pipe, a cooling water outlet pip...

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Abstract

The invention relates to a sintering device for a porous surface tube. The sintering device includes a horizontal high-temperature furnace tube. The furnace tube is provided with double heating zones, equipped with a vacuum system and a gas drying and purification device. The cooling device cools the water jacket, and the gas outlet of the furnace tube is connected to the ignition device. Put the porous surface tube to be sintered into the furnace tube, turn on the vacuum system to evacuate, and then pass the nitrogen gas into the furnace tube through the gas drying and purification device to eliminate Oxygen in the furnace tube is fed with hydrogen, and the furnace tube is heated for 20-50 minutes to make a porous surface tube. Compared with the existing porous material sintering furnace, the constant temperature zone of the device of the present invention is longer, the product quality obtained by sintering is more uniform, the operation is safe, and the processing capacity is large. More importantly, it solves the long sintering cycle that restricts the development of sintered porous materials. To solve the bottleneck problem, the sintering cycle is shortened from the original 24hr to 4-10hr.

Description

technical field [0001] The invention relates to a porous surface sintering device, in particular to a sintering device for sintered porous surface tubes, which are core components of high-efficiency heat exchangers used in heat exchange equipment such as petroleum, chemical industry, low-temperature refrigeration, air separation, seawater desalination, and aerospace. . Background technique [0002] The sintered porous surface tube is a promising boiling heat transfer enhancement technology developed in recent years. It manufactures a metal porous layer on the surface of the traditional smooth heat exchange tube (smooth tube) by high temperature sintering method. This porous layer is different from the general porous layer. The interconnected structure can enhance boiling heat transfer stably for a long time. The porous surface tube has many excellent properties: (1) It can significantly enhance the boiling heat transfer and reduce the required heat transfer area. The porou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/11
Inventor 刘阿龙彭东辉韩坤
Owner SHANGHAI RES INST OF CHEM IND