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CN-224230717-U - High-temperature carbon tube furnace equipment with inert gas protection channel

CN224230717UCN 224230717 UCN224230717 UCN 224230717UCN-224230717-U

Abstract

The utility model relates to the technical field of graphite purification equipment, in particular to high-temperature carbon tube furnace equipment with an inert gas protection channel. The device comprises a furnace shell, a heat preservation layer, a first carbon black filling layer, a second carbon black filling layer, an inert gas protection channel and a carbon tube, wherein the heat preservation layer, the first carbon black filling layer, the inert gas protection channel, the second carbon black filling layer and the carbon tube are coaxially arranged in the furnace shell in sequence from outside to inside. The utility model can solve the problem that the carbon tube is easy to oxidize in the prior art.

Inventors

  • WAN XINGBANG
  • WANG BAOLIN
  • ZHOU LIANG
  • HE YUCHUN

Assignees

  • 中南大学

Dates

Publication Date
20260512
Application Date
20250508

Claims (7)

  1. 1. The high-temperature carbon tube furnace equipment with the inert gas protection channel is characterized by comprising a furnace shell (1), a heat preservation layer (2), a first carbon black filling layer (3), a second carbon black filling layer (4), an inert gas protection channel (5) and a carbon tube (6), wherein the heat preservation layer (2), the first carbon black filling layer (3), the inert gas protection channel (5), the second carbon black filling layer (4) and the carbon tube (6) are coaxially arranged in the furnace shell (1) from outside to inside.
  2. 2. The high temperature carbon tube furnace equipment with the inert gas protection channel according to claim 1, characterized in that the distance between the inert gas protection channel (5) and the carbon tube (6) is 0.5-0.7 times of the sum of the thicknesses of the first carbon black filling layer (3) and the second carbon black filling layer (4), and the thickness of the first carbon black filling layer (3) is smaller than the thickness of the second carbon black filling layer (4).
  3. 3. The high temperature carbon tube furnace equipment with the inert gas protection channel according to claim 1, characterized in that the thickness of the first carbon black filling layer (3) is 0.38-0.8 times the thickness of the second carbon black filling layer (4).
  4. 4. The high temperature carbon tube furnace equipment with the inert gas protection channel according to claim 1, wherein the inert gas protection channel (5) has an inner diameter of 214-264 mm and an outer diameter of 222-276 mm.
  5. 5. High temperature carbon tube furnace installation with inert gas protection channel according to claim 1, characterized in that the insulation layer (2) comprises an asbestos insulation layer.
  6. 6. The high temperature carbon tube furnace apparatus with inert gas protection channel according to claim 1, further comprising a first seal arranged at an inlet end of the carbon tube (6) and a second seal arranged at an outlet end of the carbon tube (6).
  7. 7. The high temperature carbon tube furnace apparatus with inert gas protection channel according to claim 1, further comprising a third seal arranged at an inlet end of the inert gas protection channel (5) and a fourth seal arranged at an outlet end of the inert gas protection channel (5).

Description

High-temperature carbon tube furnace equipment with inert gas protection channel Technical Field The utility model relates to the technical field of graphite purification equipment, in particular to high-temperature carbon tube furnace equipment with an inert gas protection channel. Background Graphite is widely applied to traditional industries such as petroleum, metallurgy, chemical industry and the like, and novel industrial fields such as national defense, biological medicine, nuclear energy, new energy and the like due to a series of characteristics such as high temperature resistance, acid and alkali resistance, thermal shock resistance, plasticity, self-lubrication, electric conduction, heat conduction, good chemical stability and the like. Since natural graphite contains impurity elements, in order to meet the high requirements of high-end graphite products on the purity of graphite, high-temperature purification treatment is generally required for the graphite to remove the impurity elements. High temperature purification of graphite is typically accomplished using high temperature carbon tube furnace equipment. The existing high-temperature carbon tube furnaces are mostly horizontal push boat type furnaces, the internal carbon tube is a heating component, and graphite boats filled with graphite to be purified are continuously pushed to pass through a high-temperature zone, so that batch continuous production is realized. The horizontal push boat type carbon tube furnace consists of a furnace body, an asbestos heat preservation layer, carbon tubes and the like. Carbon tubes are typically made of high temperature carbon materials having a porous structure. Carbon black is filled between the carbon tube and the asbestos heat preservation layer, and the carbon black is loose carbonaceous material. In the process of purifying graphite, carbon black cannot completely isolate air permeation, so that external air gradually permeates to the outer wall of the carbon tube through pores in a carbon black layer, and oxidation reaction is carried out with the carbon tube at high temperature. Once the carbon tube is oxidized, the outer wall becomes thinner, so that the service life of the carbon tube is reduced, the production continuity and the operation safety of high-temperature carbon tube furnace equipment are affected, and in addition, the energy consumption is increased due to the thinner outer wall of the carbon tube, so that the production cost is increased. In view of the foregoing, there is a need to develop a high temperature carbon tube furnace apparatus with inert gas protection channels to solve the problem of easy oxidation of carbon tubes in the prior art. Disclosure of utility model The utility model aims to provide high-temperature carbon tube furnace equipment with an inert gas protection channel, which comprises the following specific technical scheme: The utility model provides high-temperature carbon tube furnace equipment with an inert gas protection channel, which comprises a furnace shell, a heat preservation layer, a first carbon black filling layer, a second carbon black filling layer, an inert gas protection channel and a carbon tube, wherein the heat preservation layer, the first carbon black filling layer, the inert gas protection channel, the second carbon black filling layer and the carbon tube are coaxially arranged in the furnace shell from outside to inside. Optionally, the distance between the inert gas protection channel and the carbon tube is 0.5-0.7 times of the sum of the thicknesses of the first carbon black filling layer and the second carbon black filling layer, and the thickness of the first carbon black filling layer is smaller than that of the second carbon black filling layer. Optionally, the thickness of the first carbon black filling layer is 0.38-0.8 times that of the second carbon black filling layer. Optionally, the inert gas protection channel has an inner diameter of 214-279 mm and an outer diameter of 222-276 mm. Optionally, the heat insulation layer comprises an asbestos heat insulation layer. Optionally, the high temperature carbon tube furnace device with the inert gas protection channel further comprises a first sealing piece arranged at the inlet end of the carbon tube and a second sealing piece arranged at the outlet end of the carbon tube. Optionally, the high temperature carbon tube furnace device with the inert gas protection channel further comprises a third sealing piece arranged at the inlet end of the inert gas protection channel and a fourth sealing piece arranged at the outlet end of the inert gas protection channel. The application of the technical scheme of the utility model has at least the following beneficial effects: The high-temperature carbon tube furnace equipment with the inert gas protection channel can solve the problem that carbon tubes are easy to oxidize in the prior art. In particular, in order to solve the problem that a carb