Lath unit, preparation method, and heat-insulating barrel assembled with lath unit

A technology of unit assembly and slats, which is applied in the direction of furnace components, lighting and heating equipment, furnaces, etc., can solve the problems of insufficient bonding force between layers, difficulty in forming large-sized graphite cylinders, and high production costs, so as to facilitate storage It is convenient and quick to transport and disassemble, and has excellent heat insulation performance

Active Publication Date: 2012-10-24
DALIAN LONGTIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The heat insulation effect is certain, and it is only suitable for a narrow corresponding temperature range
[0005] 2. When the single-layer overall heat insulation cylinder is partially damaged, its heat insulation effect will be affected. Once the local damage occurs, the entire heat insulation cylinder will be unusable, and the damaged part is not easy to repair, and it is difficult to achieve the second effect of the heat insulation cylinder. reuse
[0006] 3. The surface is susceptible to various erosions, and it is not conducive to multiple disassembly and installation
[0010] These traditional production methods require a series of specific molds to make the insulation cylinder. The carbon felt insulation cylinder prepared by the former method has a general insulation effect, and the insulation system occupies a large space. The graphite is easily damaged during the maintenance process, resulting in a shortened service life. Short, it is difficult to form a large-sized graphite cylinder, and the soft felt is easy to absorb impurities and is difficult to clean; while the solidified carbon felt insulation cylinder prepared by the latter method is difficult to release the stress during the carbonization and high-temperature treatment process, and the layer-to-layer Not strong enough to bind, may cause delamination
In addition, the compactness and density uniformity of the heat insulation cylinder are not easy to control, and there are certain defects in the stability of the product structure, which leads to easy damage during storage and transportation (hollow cylinder, easy to break)
The above-mentioned series of problems make the production cost high (each insulation cylinder must be completed on the mold, and when the number of molds is limited, the production time will be extended), and this insulation cylinder is a whole, if any part is damaged, the whole insulation cylinder needs to be completed Replacement, resulting in an increase in the cost of use

Method used

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  • Lath unit, preparation method, and heat-insulating barrel assembled with lath unit
  • Lath unit, preparation method, and heat-insulating barrel assembled with lath unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The first step of curing treatment: according to the required size, determine the length l, curvature radius r and radian 2π / n of the slat unit 3 of the multi-lobed heat insulation cylinder, and design the corresponding slab according to the specification of the slat unit 3 strip unit mold, and then solidify the carbon felt on the strip unit mold, immerse the carbon fiber felt cut into blocks into a resin-alcohol solution with a resin mass fraction of 10% until fully absorbed, take it out and place it in the resin at room temperature - Alcohol solution no longer drips. Then put it into the arc mold, under the temperature of 60 ℃ in 1.2×10 4 After Pa is solidified for 3 hours, the temperature is raised to 140°C for 8 hours.

[0030] The second step of heat treatment: put the solidified carbon fiber mat into a high-temperature furnace for carbonization treatment at 1200°C for 48 hours, and then put it into a vacuum graphite sintering furnace for graphitization treatment ...

Embodiment 2

[0035] like figure 1 The slat unit shown is an arc-shaped structure made of carbon fiber felt through curing, heat treatment, and machining. The slat unit is made of an integral carbon fiber felt. The radian of the slat unit is 2π / n, where n =8, a groove is opened on one side wall of the slat unit, and a protrusion is opened on the other side wall, and the groove matches the protrusion.

Embodiment 3

[0037] The first step of curing treatment: immerse the carbon fiber mat cut into blocks into a resin-alcohol solution with a resin mass fraction of 10% until fully absorbed, take it out and place it at room temperature until the resin-alcohol solution stops dripping. Then put it into a curved mold, at a temperature of 80 ° C in 1.5 × 10 4 After Pa is cured for 5 hours, the temperature is raised to 160°C for 10 hours.

[0038] The second step of heat treatment: put the solidified carbon fiber mat into a high-temperature furnace for carbonization treatment at 1300°C for 60 hours, and then put it into a vacuum graphite sintering furnace for graphitization treatment at 2100°C for 132 hours.

[0039] The third step of machining: the grooves 1 and the protrusions 2 are respectively machined on the two side walls of the heat-treated carbon felt block to obtain the lath unit 3 .

[0040] Example 4

[0041] The slat unit obtained in Example 3 is used to assemble the heat-insulating c...

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Abstract

The invention belongs to the technical field of heat-insulating materials, relating to a lath unit, wherein the lath unit is characterized in that the lath unit is in a circular arc structure preparing by curing, heat-treating and machining carbon fiber felts; a side wall of the lath unit is provided with grooves, another one side wall is provided with humps, and the grooves are matched with the humps. The lath unit provided by the invention is prepared with an integral felt so as to effectively avoid cracking caused by stress generated by the thermal expansion, and overcome layering phenomenon of a multi-layer heat-insulating barrel; a heat-insulating barrel assembled with the lath unit is in a multi-petal structure; local replacement and repair can be performed to local damaged portions of the heat-insulating barrel to utilize the heat-insulating barrel repeatedly; the heat-insulating barrel has the advantages that heat-insulating property is excellent, service life is long, the heat-insulating barrel can be stored and transported conveniently, local replacement and repair can be performed, and using cost can be reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of heat insulation materials, and in particular relates to a slat unit, a preparation method and a multi-lobed heat insulation cylinder assembled from a plurality of slat units applied to a high-temperature furnace. Background technique [0002] High-temperature furnaces are widely used in materials, energy, metallurgy and other fields, and are often used for purification, heating, modification, and preparation of products, etc., resulting in an increasing consumption of heat insulation materials. All kinds of heat insulation cylinders have emerged as the times require, and are widely used as insulation materials for polysilicon and monocrystalline silicon ingot furnaces, high-pressure gas quenching furnaces, low-pressure sintering furnaces, and vacuum sintering furnaces. Carbon / carbon composite insulation materials have the characteristics of small thermal conductivity, low heat capacity, low density, small...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F27D1/04C04B35/83C04B35/622
Inventor谭毅施伟王兵战丽姝
OwnerDALIAN LONGTIAN TECH