CN-122013371-A - Carbon fiber low-temperature furnace structure

CN122013371ACN 122013371 ACN122013371 ACN 122013371ACN-122013371-A

Abstract

The embodiment of the invention provides a carbon fiber low-temperature furnace structure, and relates to the technical field of carbon fiber production. The carbon fiber low-temperature furnace structure comprises a furnace body, a heat preservation layer, a heating pipe and a connecting piece, wherein the furnace body comprises a furnace body side plate and a furnace body cover plate, the heat preservation layer is arranged on the inner side of the furnace body side plate and the furnace body cover plate, the heat preservation layer comprises a plurality of layers of backing plate layers which are stacked in a ladder mode, the areas of the plurality of layers of backing plate layers gradually decrease towards the inner part of the furnace body, the backing plate layers comprise two backing plates which are mutually spliced, the splicing seams of the adjacent backing plate layers are arranged in a staggered mode, the heat preservation layer is arranged on one side, far away from the furnace body, of the heat preservation layer, the heating pipe is arranged in the furnace body, and the connecting piece is arranged on the heat preservation layer and used for connecting the adjacent backing plate layers. The low-temperature furnace provided by the invention can give consideration to the heat preservation, shock resistance and sealing effect of the low-temperature furnace, thereby improving the product quality.

Inventors

PEI HUAIZHOU
MAO HANWEN
YANG RUN
LI NAN

Assignees

中复神鹰碳纤维连云港有限公司

Dates

Publication Date: 20260512
Application Date: 20260309

Claims (8)

1.A carbon fiber low temperature furnace structure, comprising: The furnace body comprises a furnace body side plate and a furnace body cover plate; the heat preservation layer is arranged on the inner sides of the furnace body side plates and the furnace body cover plate, the heat preservation layer comprises a plurality of layers of back lining plate layers stacked in a stepped mode, the areas of the back lining plate layers are gradually reduced towards the inner part of the furnace body, the back lining plate layers comprise two back lining plates which are mutually spliced, and the joints of the adjacent back lining plate layers are arranged in a staggered mode; the fireproof layer is arranged on one side of the heat preservation layer away from the furnace body; The heating pipe is arranged in the furnace body; and the connecting piece is arranged on the heat insulation layer and used for connecting adjacent backing plate layers.
2. The carbon fiber low temperature furnace structure according to claim 1, wherein the backing plate is made of aluminum silicate fiber cotton.
3. The carbon fiber low temperature furnace structure of claim 1, wherein the fire resistant layer is a fire resistant plate.
4. The carbon fiber cryogenically oven construction of claim 1 wherein the backing plate has a thickness of 30-50mm and each layer of the insulation layer has a stepped mesa width the same as the backing plate thickness.
5. The carbon fiber cryogenically oven construction of claim 1 wherein the connector comprises an asbestos rope and wherein the backing plate is provided with holes through which the asbestos rope passes.
6. The carbon fiber low temperature furnace structure according to claim 1, wherein the tube head of the heating tube is penetrated in the heat insulation layer, and the tube head of the heating tube is provided with a heat insulation member.
7. The carbon fiber low temperature furnace structure of claim 6, wherein the thermal insulation member comprises a rock wool wrapping layer, the rock wool wrapping layer is wrapped outside the heating pipe head, the rock wool wrapping layer is wrapped outside and provided with the fireproof layer, and the heating pipe head is embedded in the backing plate.
8. The carbon fiber cryogenically oven construction of claim 6 wherein a plurality of heating tubes are provided in spaced relation.

Description

Carbon fiber low-temperature furnace structure Technical Field The invention relates to the technical field of carbon fiber production, in particular to a carbon fiber low-temperature furnace structure. Background In the production process of carbon fibers, a low-temperature furnace (usually referred to as a pre-oxidation furnace or a stabilizing furnace) is a critical core device and is used for converting originally flammable and easily-contained polyacrylonitrile precursor into high-temperature resistant, non-melting and non-combustible stabilized fibers through precisely-controlled low-temperature heat treatment, so that a foundation is laid for subsequent high-temperature carbonization. In the low-temperature furnace treatment process of carbon fiber production, the temperature locking and sealing performance of the furnace body directly influences the production efficiency and the product quality. The existing carbon fiber low-temperature furnace mainly adopts rock wool as a back lining heat preservation component, but the rock wool has the obvious defects that firstly, the heat conduction coefficient is high, the heat of a furnace body is easy to lose, the energy consumption of a heater is increased, the temperature in the furnace is difficult to maintain stable, secondly, the thermal shock resistance is poor, cracks and falling off are easy to occur in the temperature circulation process of the low-temperature furnace, the service life is shortened, thirdly, the rock wool is not tightly sealed after being installed, the furnace atmosphere is easy to fluctuate, the low-temperature treatment effect of carbon fiber tows is further affected, and the product performance possibly does not reach the standard. Therefore, there is a need for a low temperature furnace backing plate structure that combines thermal insulation, shock resistance and sealing. Disclosure of Invention The invention aims to provide a carbon fiber low-temperature furnace structure which can give consideration to the heat preservation, shock resistance and sealing effect of a low-temperature furnace, thereby improving the quality of products. Embodiments of the invention may be implemented as follows: In a first aspect, the present invention provides a carbon fiber low temperature furnace structure, comprising: The furnace body comprises a furnace body side plate and a furnace body cover plate; the heat preservation layer is arranged on the inner sides of the furnace body side plates and the furnace body cover plate, the heat preservation layer comprises a plurality of layers of back lining plate layers stacked in a stepped mode, the areas of the back lining plate layers are gradually reduced towards the inner part of the furnace body, the back lining plate layers comprise two back lining plates which are mutually spliced, and the joints of the adjacent back lining plate layers are arranged in a staggered mode; The fireproof layer is arranged on one side of the heat preservation layer far away from the furnace body; The heating pipe is arranged in the furnace body; and the connecting piece is arranged on the heat insulation layer and used for connecting adjacent backing plate layers. In an alternative embodiment, the backing plate is made of aluminum silicate fiber cotton. In an alternative embodiment, the fire-blocking layer is a fire-blocking plate. In an alternative embodiment, the thickness of the backing plate is 30-50mm, and the width of each stepped mesa of the insulating layer is the same as the thickness of the backing plate. In an alternative embodiment, the connection comprises an asbestos rope, and the backing plate is provided with holes through which the asbestos rope passes. In an alternative embodiment, the tube head of the heating tube is arranged in the heat insulation layer in a penetrating way, and the tube head of the heating tube is provided with a heat insulation piece. In an alternative embodiment, the heat insulating member comprises a rock wool wrapping layer, the rock wool wrapping layer wraps the heating pipe head, the rock wool wrapping layer wraps the fireproof layer, and the heating pipe head is embedded in the backing plate. In an alternative embodiment, a plurality of heating pipes are arranged at intervals. The carbon fiber low-temperature furnace structure provided by the embodiment of the invention has the beneficial effects that: Through set up the heat preservation on furnace body curb plate and furnace body apron to set up the heat preservation into the multilayer back lining plate layer that is echelonment, two back lining plate piece dislocation sets in the back lining plate layer of every layer, and connect through the connecting piece between the multilayer back lining plate layer, the heat preservation installation is convenient, and connection structure is stable, guarantees that the furnace body has good shock resistance and leakproofness, and the atmosphere is undulant in the furnace body