Pre-oxidation furnace for processing PAN-based carbon fiber product

Abstract

The utility model relates to the technical field of carbon fiber processing, and discloses a pre-oxidation furnace for processing PAN (Polyacrylonitrile)-based carbon fiber products, which comprises a furnace body, a driving roller mounted in an inner cavity of the furnace body, a release pipe fixedly assembled at the top of the furnace body, a release nozzle fixedly assembled on the outer wall of the release pipe, an air heater mounted at the top of the furnace body, and an air outlet fixedly assembled on the outer wall of the air heater. The outer wall of the furnace body is sleeved with a heat preservation bin, a water tank is fixedly assembled on the top of the heat preservation bin, and a connecting pipe is installed on the outer wall of the heat preservation bin. According to the pre-oxidation furnace for processing the PAN-based carbon fiber product, through the arrangement of an exhaust pipe and a recovery bin, air in the furnace body can be introduced into an inner cavity of the recovery bin under the action of the exhaust pipe and is in full contact with a heat conduction pipe in the recovery bin, and at the moment, heat in the exhausted air can be absorbed; and the heat is transferred to water in the inner cavity of the heat conduction pipe, so that the heat of the discharged tail gas is absorbed.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber processing, in particular to a pre-oxidation furnace for processing PAN-based carbon fiber products. Background Art

[0002] Carbon fiber refers to high-strength and high-modulus fiber with a carbon content of more than 90%. It is made of acrylic and viscose fibers and is oxidized and carbonized at high temperatures. Pre-oxidation is a necessary process step in the production of PAN-based carbon fibers. Existing pre-oxidation furnaces mostly use electric heating to pre-oxidize carbon fibers through circulating air.

[0003] When a traditional pre-oxidation furnace is in use, it discharges gas during the heating cycle, but the discharged gas also contains a large amount of heat. Traditional equipment directly discharges air into the air, so the heat in the discharged gas cannot be utilized, resulting in insufficient heat utilization and a certain amount of energy waste. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a pre-oxidation furnace for processing PAN-based carbon fiber products, which has the advantages of high heat utilization rate and good thermal insulation effect, and solves the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical scheme: a pre-oxidation furnace for processing PAN-based carbon fiber products, comprising a furnace body, an inner cavity of the furnace body is equipped with a driving roller, a release pipe is fixedly installed on the top of the furnace body, a release nozzle is fixedly installed on the outer wall of the release pipe, an air heater is installed on the top of the furnace body, a heat preservation bin is sleeved on the outer wall of the furnace body, a water tank is fixedly installed on the top of the heat preservation bin, a connecting pipe is installed on the outer wall of the heat preservation bin, an exhaust pipe is fixedly installed on the outer wall of the furnace body, a recovery bin is installed on the outer edge of the exhaust pipe, a heat conduction pipe is installed in the inner cavity of the recovery bin, a water outlet pipe is fixedly installed on the outer edge of the heat conduction pipe, a water inlet pipe is installed on the outer edge of the heat conduction pipe, and a discharge pipe is installed on the outer edge of the recovery bin.

[0006] As a preferred technical solution of the utility model: the outer wall of the release pipe is connected to the air outlet of the air heater, and the outer wall of the release pipe passes through the inner cavity of the heat preservation chamber and enters the inner cavity of the furnace body.

[0007] As a preferred technical solution of the utility model: the inner cavity of the heat preservation bin is a hollow structure, and the outer wall of the connecting pipe passes through the outer wall of the heat preservation bin and communicates with the inner cavity of the heat preservation bin.

[0008] As a preferred technical solution of the utility model: the outer wall of the water outlet pipe is connected to the inner cavity of the heat preservation chamber, and the outer wall of the water inlet pipe is connected to the inner cavity of the water tank.

[0009] As a preferred technical solution of the utility model: a water pump is installed in the inner cavity of the water tank, and the water outlet of the water pump is connected to the outer wall of the water inlet pipe.

[0010] As a preferred technical solution of the utility model: the inner wall diameter of the discharge pipe is smaller than the inner wall diameter of the exhaust pipe, and the inner cavity of the exhaust pipe is communicated with the inner cavity of the insulation bin.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The pre-oxidation furnace for processing PAN-based carbon fiber products can pass the air inside the furnace body into the inner cavity of the recovery bin through the exhaust pipe and the recovery bin. The air is fully in contact with the heat pipe in the recovery bin. At this time, the heat in the discharged air can be absorbed and transferred to the water in the inner cavity of the heat pipe, thereby absorbing the heat of the discharged exhaust gas.

[0013] 2. The pre-oxidation furnace for processing PAN-based carbon fiber products heats the water in the water tank through the heat-insulating bin arranged on the outer wall of the furnace body under the action of the heat-conducting pipe in the recovery bin, and releases the water into the inner cavity of the heat-insulating bin, so that the temperature in the inner cavity of the furnace body is better preserved under the action of the heat-insulating bin, and the heat loss to the outside is reduced, thus avoiding the method of traditional equipment to perform heat preservation by means of materials, so that the heat in the inner cavity of the equipment is better preserved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the furnace structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the furnace body of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the insulation warehouse of the utility model;

[0018] Figure 5 This is a schematic diagram of the recovery bin structure of the utility model.

[0019] In the figure: 1. furnace body; 2. driving roller; 3. release pipe; 4. release nozzle; 5. air heater; 6. insulation chamber; 7. connecting pipe; 8. water tank; 9. exhaust pipe; 10. recovery chamber; 11. heat transfer pipe; 12. discharge pipe; 13. water outlet pipe; 14. water inlet pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 - Figure 5 A pre-oxidation furnace for processing PAN-based carbon fiber products comprises a furnace body 1, a driving roller 2 is installed in the inner cavity of the furnace body 1, a release pipe 3 is fixedly installed on the top of the furnace body 1, a release nozzle 4 is fixedly installed on the outer wall of the release pipe 3, an air heater 5 is installed on the top of the furnace body 1, a heat preservation bin 6 is sleeved on the outer wall of the furnace body 1, a water tank 8 is fixedly installed on the top of the heat preservation bin 6, a connecting pipe 7 is installed on the outer wall of the heat preservation bin 6, an exhaust pipe 9 is fixedly installed on the outer wall of the furnace body 1, a recovery bin 10 is installed on the outer edge of the exhaust pipe 9, a heat conduction pipe 11 is installed in the inner cavity of the recovery bin 10, a water outlet pipe 13 is fixedly installed on the outer edge of the heat conduction pipe 11, a water inlet pipe 14 is installed on the outer edge of the heat conduction pipe 11, and a discharge pipe 12 is installed on the outer edge of the recovery bin 10.

[0022] The air is heated by the air heater 5 installed on the top of the furnace body 1, and then the hot air is introduced into the inner cavity of the furnace body 1 through the release pipe 3. At this time, the temperature in the inner cavity of the furnace body 1 can be increased, thereby achieving high-temperature pre-oxidation of the carbon fiber.

[0023] In a preferred embodiment, the outer wall of the release pipe 3 is connected to the air outlet of the air heater 5 , and the outer wall of the release pipe 3 passes through the inner cavity of the heat preservation chamber 6 and enters the inner cavity of the furnace body 1 .

[0024] Through the release tube 3 arranged on the top of the furnace body 1, the heated air is introduced into the inner cavity of the furnace body 1 under the action of the air heater 5, and then the temperature in the inner cavity of the furnace body 1 is increased, so as to achieve the effect of pre-oxidation of the carbon fiber, and the release nozzle 4 arranged on the outer wall of the release tube 3 can better spray the hot air into the inner cavity of the furnace body 1 under the action of the release nozzle 4.

[0025] In a preferred embodiment, the inner cavity of the heat preservation bin 6 is a hollow structure, and the outer wall of the connecting pipe 7 passes through the outer wall of the heat preservation bin 6 and communicates with the inner cavity of the heat preservation bin 6 .

[0026] By means of the connecting pipe 7 provided on the outer wall of the heat preservation bin 6, the inner cavity of the heat preservation bin 6 can be communicated with the inner cavity of the water tank 8 under the action of the connecting pipe 7, so that the water in the inner cavity of the water tank 8 and the heat preservation bin 6 can circulate, so that the water can be better heated under the action of the recovery bin 10, so that the temperature in the inner cavity of the furnace body 1 can be better preserved and will not be lost to the outside, thereby improving the utilization rate of heat.

[0027] In a preferred embodiment, the outer wall of the water outlet pipe 13 is connected to the inner cavity of the heat preservation chamber 6 , and the outer wall of the water inlet pipe 14 is connected to the inner cavity of the water tank 8 .

[0028] Through the heat conduction pipe 11 arranged in the inner cavity of the recovery bin 10, when the water flow in the water tank 8 enters the inner cavity of the heat conduction pipe 11, the air in the inner cavity of the furnace body 1 is passed into the inner cavity of the recovery bin 10 under the action of the exhaust pipe 9. At this time, the air will fully contact the outer wall of the heat conduction pipe 11, thereby transferring the heat in the air to the water in the inner cavity of the heat conduction pipe 11.

[0029] In a preferred embodiment, a water pump is installed in the inner cavity of the water tank 8 , and the water outlet of the water pump is connected to the outer wall of the water inlet pipe 14 .

[0030] By means of a water pump arranged in the inner cavity of the water tank 8, the water in the inner cavity of the water tank 8 is pumped into the inner cavity of the heat conduction pipe 11 under the action of the water pump. At this time, the air outlet of the furnace body 1 is connected to the recovery bin 10 under the action of the exhaust pipe 9, so that the waste heat of the air coming out of the inner cavity of the furnace body 1 can be transferred to the inner cavity of the heat conduction pipe 11.

[0031] In a preferred embodiment, the inner wall diameter of the discharge pipe 12 is smaller than the inner wall diameter of the exhaust pipe 9 , and the inner cavity of the exhaust pipe 9 is communicated with the inner cavity of the heat preservation chamber 6 .

[0032] The air in the inner cavity of the furnace body 1 is discharged outwardly through the exhaust pipe 9 arranged on the outer wall of the furnace body 1, and then the air with residual heat is passed into the inner cavity of the recovery bin 10, so that the air contacts the outer wall of the heat conducting pipe 11, thereby transferring the residual heat in the air to the water in the inner cavity of the heat conducting pipe 11.

[0033] Working principle: During the use of the above-mentioned equipment, when the equipment is needed to pre-oxidize the carbon fiber, the carbon fiber filaments are inserted into the inner cavity of the furnace body 1, and the air heater 5 is started. Then, under the action of the air heater 5, the air can be heated, so that the carbon fiber filaments can be pre-oxidized after being heated. During the oxidation process, the air in the inner cavity of the furnace body 1 will be discharged outward, and enter the inner cavity of the recovery bin 10 under the action of the exhaust pipe 9, and fully contact with the outer wall of the heat-conducting pipe 11. Under the action of the water pump in the inner cavity of the water tank 8, the water in the inner cavity of the water tank 8 is pumped into the inner cavity of the heat-conducting pipe 11. Then, in the process of air heat conduction, the temperature of the water is increased, and under the action of the water outlet pipe 13, the heated water is passed into the inner cavity of the insulation bin 6. Then, under the action of the insulation bin 6, the insulation effect of the furnace body 1 is achieved, so that the heat in the inner cavity of the furnace body 1 is reduced and dissipated outward, thereby better utilizing the heat and better pre-oxidizing the carbon fiber.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-oxidation furnace for processing PAN-based carbon fiber products, comprising a furnace body (1), characterized in that: The inner cavity of the furnace body (1) is installed with a driving roller (2), the top of the furnace body (1) is fixedly equipped with a release pipe (3), the outer wall of the release pipe (3) is fixedly equipped with a release nozzle (4), the top of the furnace body (1) is installed with an air heater (5), the outer wall of the furnace body (1) is sleeved with a heat preservation bin (6), the top of the heat preservation bin (6) is fixedly equipped with a water tank (8), the outer wall of the heat preservation bin (6) is installed with a connecting pipe (7), the outer wall of the furnace body (1) is fixedly equipped with an exhaust pipe (9), the outer edge of the exhaust pipe (9) is installed with a recovery bin (10), the inner cavity of the recovery bin (10) is installed with a heat conduction pipe (11), the outer edge of the heat conduction pipe (11) is fixedly equipped with a water outlet pipe (13), the outer edge of the heat conduction pipe (11) is installed with a water inlet pipe (14), and the outer edge of the recovery bin (10) is installed with a discharge pipe (12).

2. The pre-oxidation furnace for processing PAN-based carbon fiber products according to claim 1, characterized in that: The outer wall of the release pipe (3) is connected to the air outlet of the air heater (5), and the outer wall of the release pipe (3) passes through the inner cavity of the heat preservation chamber (6) and enters the inner cavity of the furnace body (1).

3. The pre-oxidation furnace for processing PAN-based carbon fiber products according to claim 1, characterized in that: The inner cavity of the heat preservation bin (6) is a hollow structure, and the outer wall of the connecting pipe (7) passes through the outer wall of the heat preservation bin (6) and communicates with the inner cavity of the heat preservation bin (6).

4. The pre-oxidation furnace for processing PAN-based carbon fiber products according to claim 1, characterized in that: The outer wall of the water outlet pipe (13) is connected to the inner cavity of the heat preservation chamber (6), and the outer wall of the water inlet pipe (14) is connected to the inner cavity of the water tank (8).

5. The pre-oxidation furnace for processing PAN-based carbon fiber products according to claim 1, characterized in that: A water pump is installed in the inner cavity of the water tank (8), and the water outlet of the water pump is connected to the outer wall of the water inlet pipe (14).

6. The pre-oxidation furnace for processing PAN-based carbon fiber products according to claim 1, characterized in that: The inner wall diameter of the discharge pipe (12) is smaller than the inner wall diameter of the exhaust pipe (9), and the inner cavity of the exhaust pipe (9) is in communication with the inner cavity of the heat preservation chamber (6).

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