CN210528477U

CN210528477U - Low-cost sectional type high temperature retort

Info

Publication number: CN210528477U
Application number: CN201920686979.0U
Authority: CN
Inventors: 刘永华
Original assignee: Xi'an Furuida Technology Development Co ltd
Current assignee: Xi'an Furuida Technology Development Co ltd
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-05-15
Anticipated expiration: 2029-05-14

Abstract

The utility model discloses a low-cost sectional type high temperature retort, including horizontal furnace body shell, furnace body shell both ends are provided with the furnace nozzle that is used for the carbon fiber business turn over, furnace body shell middle part transverse arrangement has the graphite heat-generating body that a plurality of sections are hollow to supply the carbon fiber to pass, is connected with two water-cooled electrode on every section graphite heat-generating body, and the tip of the water-cooled electrode on every section graphite heat-generating body extends to and is connected with rectifier transformer electricity behind the furnace body shell outer wall, and it has thermal-insulated insulation material to fill between graphite heat-generating body outer and the furnace body shell inner wall, is equipped with a temperature thermocouple on every section graphite heat-generating. Compared with the prior art, the utility model relates to a simple structure, only need change the graphite heat-generating body of corresponding warm area during the maintenance can, make the manufacturing cost and the operation maintenance cost greatly reduced of this type of equipment.

Description

Low-cost sectional type high temperature retort

Technical Field

The utility model relates to a high temperature retort field, especially a low-cost sectional type high temperature retort.

Background

The high-temperature carbonization furnace is key equipment for manufacturing carbon fibers, and the temperature is generally 1000-1600 ℃. The heating materials which can be selected are silicon carbon rods, silicon molybdenum rods and graphite materials, and due to the difference of the use temperature and the service life, the graphite materials are widely applied with excellent cost performance although the cost is high. Generally, a high-temperature carbonization furnace is designed with 4-6 temperature zones, so that carbon fibers passing through the high-temperature carbonization furnace continuously pass through different temperature zones to complete the conversion process of the fibers with the carbon content of 95%.

The existing high-temperature carbonization furnace mostly adopts the structural form of inner and outer muffle, and the main defects of the design of the existing high-temperature carbonization furnace are as follows:

1. the equipment consists of an inner muffle furnace, a heating element, an outer muffle furnace, a heat preservation carbon felt and the like, the structure is relatively complex, and the equipment cost is high;

2. the heat conduction of the integral inner muffle is serious, and the mutual interference among temperature zones is serious;

3. the heating element can be replaced only after the outer muffle is removed during maintenance, and if the workload for maintaining the inner muffle is larger, the inner muffle is completely removed, so that the maintenance period is long, and the production stop loss is large;

4. because the equipment has more parts, the specifications and models of spare parts are more.

Disclosure of Invention

The utility model discloses a solve exist among the prior art not enough, provide a simple structure, maintain convenient, the low-cost sectional type high temperature retort of continuous use cycle length.

In order to achieve the purpose, the utility model is implemented according to the following technical scheme:

a low-cost sectional high-temperature carbonization furnace comprises a horizontal furnace body shell, furnace nozzles for carbon fiber to pass in and out are arranged at two ends of the furnace body shell, a plurality of sections of hollow graphite heating bodies for carbon fiber to pass through are transversely arranged in the middle of the furnace body shell, water-cooling electrodes are symmetrically arranged on the upper end surface and the lower end surface of each section of graphite heating body and are perpendicular to the transversely arranged graphite heating bodies, one end of each water-cooling electrode on each section of graphite heating body extends to the outer wall of the furnace body shell and is electrically connected with a rectifier transformer, the other end of each water-cooling electrode is fixed with the graphite heating body through a graphite bolt or a carbon bolt through a graphite processed U-shaped connecting piece, the U-shaped connecting piece is used for clamping the water-cooling electrode on the graphite heating body, a heat insulation material is filled between the, the furnace mouth is provided with an air seal device.

Further, a water-cooling jacket is arranged on the furnace wall of the furnace body shell.

Further, the gas seal device sets up in a set of pressure equalizing chamber of violently managing upper and lower both ends face and with violently managing inside intercommunication including connecting violently managing, symmetry that stove mouth tip and carbon fiber passed, sets up perpendicularly in the outside intake pipe on pressure equalizing chamber top, and outside intake pipe tip links to each other with high-purity nitrogen gas air supply system's gas outlet.

Furthermore, at least two groups of pressure equalizing cavities are arranged on the transverse pipe.

Compared with the prior art, the utility model adopts the water-cooling jacket form to cool the furnace body shell, and then the direct current with low voltage and heavy current is independently introduced into each section of graphite heating element through the rectifier transformer, so that the graphite heating element generates heat to achieve the purpose of generating a high temperature field of 1800 ℃, thereby achieving the purpose of independently controlling the temperature of each heating element, and the heat insulation material is coated outside the graphite heating element to play the roles of good heat insulation and uniform heat field; the low-voltage large current is introduced into the furnace through the water-cooling electrode positioned on one side of the furnace body and is connected to the heating body, the special connection form of the water-cooling electrode can realize electricity introduction and simultaneously is used for supporting the graphite heating body, a supporting part of the graphite heating body can be omitted, and meanwhile, the external heat conduction is reduced to enhance the internal temperature uniformity, so the cost is reduced, and the stability is improved; in addition, the graphite heating body of each temperature zone is separated, so that the problem of mutual interference of the temperatures of the temperature zones is effectively avoided.

Therefore, the utility model relates to a simple structure, only need change the graphite heat-generating body of corresponding warm area during the maintenance can, make the manufacturing cost and the operation maintenance cost greatly reduced of this type of equipment.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

FIG. 3 shows the form of connection between the graphite heating element and the water-cooled electrode.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

As shown in fig. 1, 2 and 3, the present embodiment provides a low-cost segmented high-temperature carbonization furnace, which includes a horizontal furnace body shell 2, furnace nozzles 1 for the carbon fibers 5 to enter and exit are arranged at two ends of the furnace body shell 2, a plurality of hollow graphite heating elements 4 for the carbon fibers 5 to pass through are transversely arranged in the middle of the furnace body shell 2, water-cooled electrodes 6 are symmetrically arranged on the upper end surface and the lower end surface of each section of graphite heating element 4, the water-cooled electrodes 6 are perpendicular to the transversely arranged graphite heating elements 4, one end of the water-cooled electrode 6 on each section of graphite heating element 4 extends to the outer wall of the furnace body shell 2 and is electrically connected with a rectifier transformer, the other end of the water-cooled electrode 6 is fixed with the graphite heating elements 4 through a graphite bolt or a carbon bolt 12 by a graphite processing U-shaped connecting piece 11, the U-shaped connecting piece 11 is used for clamping the water-cooled electrode 6 on, each section of graphite heating body 4 is provided with a temperature thermocouple 7, the furnace mouth 1 is provided with an air seal device, and the purpose of the air seal device is to prevent external air from entering the inside of the furnace body shell 2.

In the practical use process, the furnace wall of the furnace body shell 2 is provided with a water-cooling jacket, the water-cooling jacket can be in an outer water-cooling jacket form or an inner water-cooling jacket form, the furnace body shell can be directly assembled according to the prior art, the finished product of the furnace body shell can also be directly purchased, and the water-cooling jacket form is used for cooling the furnace body shell 2.

In the in-service use process, the atmoseal device sets up respectively and violently manage 8, symmetry about 8 both ends faces and with a set of pressure-equalizing chamber 9 of violently managing 8 inside intercommunication including connecting violently pipe 8, the symmetry that 1 tip and carbon fiber 5 passed in the furnace nose, sets up perpendicularly in the outside intake pipe 10 on pressure-equalizing chamber 9 top, and outside intake pipe 10 tip links to each other with high-purity nitrogen gas air supply system's gas outlet, and the concrete principle is: the high-purity nitrogen gas supply system leads high-purity nitrogen gas into an external gas inlet pipe 10, then the pressure of the high-purity nitrogen gas is balanced through a pressure equalizing cavity 9, then stable airflow is formed and blown downwards perpendicular to a transverse pipe, and an air curtain is formed by blowing the high-purity nitrogen gas upwards and downwards simultaneously, so that the external gas is prevented from entering the furnace body shell 2 through a furnace mouth.

In the in-service use in-process, the pressure-equalizing chamber on violently managing 8 sets up two sets ofly at least, can form several air curtains more like this, and sealed effect is better.

The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.

Claims

1. The utility model provides a low-cost sectional type high temperature retort, includes horizontal furnace body shell, and furnace body shell both ends are provided with the furnace mouth that is used for the carbon fiber business turn over, its characterized in that: the furnace body shell middle part transverse arrangement has the graphite heat-generating body that a plurality of sections of hollow confession carbon fiber passed, the up end and the lower terminal surface symmetry of every section graphite heat-generating body are equipped with water-cooled electrode, water-cooled electrode perpendicular to transverse arrangement's graphite heat-generating body, the one end of the water-cooled electrode on every section graphite heat-generating body extends to furnace body shell outer wall after and is connected with rectifier transformer electricity, the U-shaped connecting piece that the other end of water-cooled electrode processed through graphite is fixed with graphite bolt or carbon bolt and graphite heat-generating body, the U-shaped connecting piece is used for pressing from both sides the water-cooled electrode tightly on graphite heat-generating body, it has thermal-insulated insulation material to fill between graphite heat-generating body outer wall and the.

2. The low-cost segmented high-temperature carbonization furnace as claimed in claim 1, wherein: the furnace wall of the furnace body shell is provided with a water-cooling jacket.

3. The low-cost segmented high-temperature carbonization furnace as claimed in claim 1, wherein: the gas seal device comprises a transverse pipe connected to the end part of the furnace nozzle and penetrated by carbon fibers, a set of pressure equalizing cavities symmetrically arranged on the upper end face and the lower end face of the transverse pipe and communicated with the inner part of the transverse pipe, and an external air inlet pipe vertically arranged at the top end of the pressure equalizing cavities, wherein the end part of the external air inlet pipe is connected with an air outlet of a high-purity nitrogen gas supply system.

4. A low-cost segmented high temperature carbonization furnace as claimed in claim 3, characterized in that: at least two groups of pressure equalizing cavities are arranged on the transverse pipe.