CN217604666U - Large-size sealed vulcanizing furnace - Google Patents

Abstract

The utility model discloses a jumbo size sealed vulcanization furnace, include: the furnace body is of a sealing structure, and a lifting furnace door is arranged at the opening of the furnace body; the air heating circulating system comprises an air channel arranged on the inner side of the furnace body, a heating module for heating gas is arranged in the air channel, and an air inlet and an air outlet of the air channel are respectively arranged at the top and below the furnace body; a circulating fan is arranged at the air inlet; the air exhaust system is used for exhausting outside air into the air channel of the furnace body and exhausting gas in the furnace body; and the waste gas purification treatment system is positioned outside the furnace body and is used for receiving gas exhausted by the air exhaust system. This scheme of adoption is through using each module in jumbo size vulcanization stove to guaranteed the closed processing of stove interior vulcanization technology, and through air heating circulation system, use in low temperature vulcanization technology, enable the internal constant temperature of whole furnace, thereby guarantee the vulcanization effect.

Description

Large-size sealed vulcanizing furnace

Technical Field

The utility model relates to an aeronautical manufacturing technical field, concretely relates to jumbo size sealed vulcanization furnace.

Background

At present, a vulcanizing furnace is a new generation of high-efficiency low-pollution clean combustion technology which is rapidly developed in recent decades, and is mainly characterized in that fuel and a desulfurizer are repeatedly subjected to low-temperature combustion and desulfurization reaction through multiple cycles, surge flow in the furnace is strong, low NOx emission, 90% of desulfurization efficiency and combustion efficiency similar to that of a pulverized coal furnace can be achieved, and the vulcanizing furnace has the advantages of wide fuel adaptability, good load regulation performance, easiness in comprehensive utilization of ash residues and the like.

However, the vulcanizing furnace in the prior art has low vulcanizing efficiency due to the small volume and the vulcanizing process is carried out in the furnace, and the vulcanizing process is generally vulcanized in an electric heating mode, but when the vulcanizing furnace is applied to a large-scale vulcanizing furnace, the problem that the temperature cannot be kept constant in the vulcanizing furnace occurs, and the vulcanizing process is seriously influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a jumbo size sealed vulcanization stove, this scheme of adoption is through using each module in the jumbo size vulcanization stove to guaranteed the closed processing of stove interior vulcanization technology, and through air heating circulation system, use in low temperature vulcanization technology, enable constant temperature in the whole furnace body, thereby guarantee to vulcanize the effect.

The utility model discloses a following technical scheme realizes:

a large size encapsulated vulcanization furnace comprising:

the furnace body is of a sealing structure, and a lifting furnace door is arranged at an opening of the furnace body;

the air heating circulating system comprises an air channel arranged on the inner side of the furnace body, a heating module for heating air is arranged in the air channel, and an air inlet and an air outlet of the air channel are respectively arranged at the top and below the furnace body; a circulating fan is arranged at the air inlet;

the air exhaust system is used for exhausting outside air into the air channel of the furnace body and exhausting gas in the furnace body;

and the waste gas purification treatment system is positioned outside the furnace body and is used for receiving the gas exhausted by the air draft exhaust system.

Compared with the prior art, the vulcanizing furnace has low vulcanizing efficiency due to the fact that the vulcanizing process is carried out in the vulcanizing furnace due to the small size, the vulcanizing furnace is usually vulcanized in an electric heating mode, but when the vulcanizing furnace is applied to a large-sized vulcanizing furnace, the problem that the inside of the vulcanizing furnace cannot be kept at a constant temperature and the vulcanizing process is seriously influenced is solved, the scheme provides the large-sized sealed vulcanizing furnace, the large-sized sealed vulcanizing furnace can be applied to the large-sized vulcanizing furnace through a whole set of system, and the vulcanizing process of the large-sized vulcanizing furnace is guaranteed; in the specific scheme, the furnace body is included, in order to ensure that harmful gases such as sulfur dioxide and the like leak out in the vulcanization process, the furnace body adopts an integral sealing structure, an opening is arranged on one side, a lifting furnace door is arranged at the opening, and the opening is sealed through the lifting furnace door; then, the constant temperature in the furnace body is ensured through an air heating and circulating system, and the vulcanization efficiency is improved; after vulcanization is completed, harmful gas in the furnace is discharged through the air draft exhaust system, and the discharged harmful gas is treated through the waste gas purification treatment system, so that a whole set of vulcanization equipment is formed, and the vulcanization equipment is suitable for being used in large-size vulcanization furnaces.

Further optimizing, the furnace body comprises a shell and a steel structure frame, the top layer of the steel structure frame is of a double-layer beam structure, and an installation space is reserved between the double-layer beam structure; the outer shell is coated on the outer side of the steel structure frame; used for reserving a placing space of a circulating fan, an air duct and the like.

Further optimizing, the steel structure frame is formed by splicing a plurality of rectangular pipes, a heat insulation material is laid between the shell and the steel structure frame, and the rectangular pipes are filled with the heat insulation material; used for ensuring the heat insulation effect.

Further preferably, a plurality of air heating circulation zones are arranged in the furnace body, an air heating circulation system is arranged in each air heating circulation zone, each air heating circulation system comprises a circulation fan positioned at the top of the inner side of the furnace body, and air channels are arranged on two sides of each circulation fan and communicated with air inlets of the air channels; the plurality of air channels are respectively arranged on two sides in the furnace body; the device is used for matching with a large-size vulcanizing furnace, and the constant temperature in the furnace is quickly realized.

Further optimizing, the air outlets of the air ducts are provided with louver air openings; the circulating air duct is divided into 4 areas, and each area is symmetrically arranged; the air duct is embedded into the inner parts of the two sides of the furnace body; used for adjusting the tuyere.

The air exhaust system comprises an air inlet pipeline and an air exhaust pipeline, wherein the air inlet pipeline is arranged at the top of the outer side of the furnace body and is communicated with the circulating fan; the exhaust pipeline is positioned outside the furnace body and communicated with the interior of the furnace body, and an exhaust fan is arranged on the exhaust pipeline; the air inlet pipeline and the exhaust pipeline are both provided with one-way valves; is used for discharging harmful gases such as sulfide, hydride and the like contained in the furnace body.

Further optimizing, the inlet end of the exhaust pipeline and the inner side of the furnace body are both provided with harmful gas concentration detection sensors; an oxygen concentration detection sensor is also arranged in the furnace body.

Preferably, the exhaust gas purification treatment system comprises a desulfurizing tower for receiving the gas exhausted by the air draft exhaust system.

The device is further optimized to further comprise a temperature control system, wherein a temperature sensor is arranged in the air duct, and the temperature control system is used for receiving data of the temperature sensor and controlling the power of the heating module; used for controlling the temperature in the furnace body.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the utility model provides a large-size sealed vulcanizing furnace, which ensures the closed processing of the vulcanizing process in the furnace by applying each module in the large-size vulcanizing furnace, and ensures the vulcanizing effect by applying the air heating and circulating system in the low-temperature vulcanizing process and keeping the temperature in the whole furnace body constant; harmful gases containing sulfides, hydrides and the like in the furnace body can be rapidly discharged, and the gases in the furnace are prevented from escaping outwards; and fresh air is introduced, so that the temperature in the large-size vulcanizing furnace and the temperature of workpieces can be quickly reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic view of a furnace structure according to an embodiment of the present invention;

fig. 2 is a top view of an embodiment provided by the present invention;

fig. 3 is a schematic structural diagram of a steel structural frame according to an embodiment of the present invention;

fig. 4 is a front view of a steel structural frame according to an embodiment of the present invention;

fig. 5 is a schematic cycle diagram of an air heating cycle system according to an embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

1-furnace body, 2-steel structure frame, 3-air duct, 4-heating module, 5-circulating fan, 6-louver air port, 7-exhaust fan, 8-desulfurizing tower, 9-lifting furnace door, 10-exhaust collecting pipe and 11-shell.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Examples

The present embodiment provides a large-sized sealed vulcanizing furnace, as shown in fig. 1 to 5, comprising:

the furnace comprises a furnace body 1, wherein the furnace body 1 is a sealing structure, and a lifting furnace door 9 is arranged at an opening of the furnace body 1;

the air heating circulation system comprises an air channel 3 arranged on the inner side of the furnace body 1, a heating module 4 for heating air is arranged in the air channel 3, and an air inlet and an air outlet of the air channel 3 are respectively arranged at the top and the lower part of the furnace body 1; a circulating fan 5 is arranged at the well air port;

the air exhaust system is used for exhausting outside air into the air duct 3 of the furnace body 1 and exhausting gas in the furnace body 1;

and the waste gas purification treatment system is positioned outside the furnace body 1 and is used for receiving the gas exhausted by the air draft exhaust system.

Compared with the prior art, the vulcanizing furnace has low vulcanizing efficiency due to the fact that the vulcanizing process is carried out in the vulcanizing furnace due to the small size, the vulcanizing furnace is usually vulcanized in an electric heating mode, but when the vulcanizing furnace is applied to a large-sized vulcanizing furnace, the problem that the inside of the vulcanizing furnace cannot be kept at a constant temperature and the vulcanizing process is seriously influenced is solved, the scheme provides the large-sized sealed vulcanizing furnace, the large-sized sealed vulcanizing furnace can be applied to the large-sized vulcanizing furnace through a whole set of system, and the vulcanizing process of the large-sized vulcanizing furnace is guaranteed; in the specific scheme, the furnace comprises a furnace body 1, in order to ensure that harmful gases such as sulfur dioxide and the like leak out in the vulcanization process, the furnace body 1 adopts an integral sealing structure, an opening is arranged on one side, a lifting furnace door 9 is arranged at the opening, and the opening is sealed by the lifting furnace door 9; then, the constant temperature in the furnace body 1 is ensured through an air heating and circulating system, so that the vulcanization efficiency is improved; after vulcanization is completed, harmful gas in the furnace is discharged through the air exhaust system, and then the discharged harmful gas is treated through the waste gas purification treatment system, so that a whole set of vulcanization equipment is formed, and the method is suitable for being used in large-size vulcanization furnaces.

In the foregoing, fig. 1 is the utility model provides an embodiment's furnace body 1 structure schematic diagram, but for embodying clearer structure, the top closing cap in fig. 1 is not seen, and is structural at actual furnace body 1, still is equipped with the closing cap at furnace body 1 top for seal furnace body 1 top. The design of the lifting furnace door 9 fully considers the smooth in and out of the product according to the site environment; the sealing property, the safety and the durability of the door are improved; it is designed into a 3-segment lift gate structure. The whole system mainly comprises a door post, a door plate, a lifting door machine system, a safety device and the like. Wherein 3 times of overlapping structures are designed for the large-size vulcanizing oven door, each door panel is 5500mm long and 2000mm high and 150mm thick, and the maximum height of opening the oven door is 5000mm. Be equipped with good sealing strip between furnace body 1 and over-and-under type furnace gate 9, even install on furnace body 1 frame with silica gel sealing strip environmental protection high temperature resistant, the furnace gate is after the operation targets in place when closing the door, adopts six jacking cylinders with four angles of two furnace gates and vertical middle part jacking simultaneously, the furnace gate closely seals with jumbo size vulcanization stove door frame and links to each other, compresses tightly the silica gel sealing strip between door and box by the pressure of cylinder and seals. The temperature is prevented from leaking, and the furnace door is connected with the furnace door and is sealed by adopting a silica gel sealing strip between the L-shaped step and the step. The air intake and exhaust in the furnace run and supply under the micro negative pressure, so as to prevent the leakage of harmful gas and the shortage of internal oxygen.

Referring to fig. 1, 3 and 4, in the present embodiment, the furnace body 1 includes a shell 11 and a steel structural frame 2, a top layer of the steel structural frame 2 is a double-layer beam structure, and an installation space is reserved between the double-layer beam structure; the shell 11 is coated outside the steel structure frame 2; for leaving circulating fan 5, the arrangement space of wind channel 3 etc., in this scheme, furnace body 1 is including shell 11 and steel construction frame 2, wherein steel construction frame 2 adopts national standard carbon steel section bar assembly welding to form, the design of the whole furnace body 1 steel construction of bonderizing anticorrosive treatment is done on the surface has fully considered the heat altered shape factor, fastness, stability, and set up door type stand according to bearing capacity and accuse temperature subregion, the stand adopts the preparation of high strength 160X 80X 6mm quarter bend, install the crossbeam additional between the stand, the crossbeam mainly comprises 160X 80X 6mm and 80X 4mm quarter bend. Form steel structure frames 2 at two sides, top and rear part of the furnace body 1. The top of the steel structure frame 2 of the furnace body 1 is of a double-layer beam structure, the circulating fan 5, the circulating air duct 3, the heating module 4 and the like are embedded in a double-layer framework, the projections on the top of the furnace body 1 are fewer and more concise, and the later maintenance is more convenient. The shell 11 is formed by bending, molding and modularly assembling delta 2mm carbon steel plates, spraying plastic on the surface, and paving heat-insulating materials inside; the splicing gap is sealed by special structural adhesive to ensure the sealing performance and prevent harmful gases such as SO2 and the like from leaking in the vulcanization production process. The shell 11 is installed in a pinch plate mode, the structural connection is firm, welding traces do not exist, and the appearance is attractive.

With reference to fig. 3 and 4, in this embodiment, the steel structural frame 2 is formed by splicing a plurality of rectangular pipes, a heat insulation material is laid between the shell 11 and the steel structural frame 2, and the rectangular pipes are filled with the heat insulation material; the heat insulation and preservation effect is ensured; the heat insulation material is selected from high-quality composite aluminum silicate fiber felt and other high-performance heat insulation materials, has light weight and good heat insulation effect, can resist the temperature of more than 400 ℃, and is in staggered joint lap joint during heat insulation construction; the thickness of the heat-insulating layer of each side wall is equal to or larger than 100mm on average, so that the heat-insulating effect is ensured; thermal insulation materials are laid between the shell 11 and the steel structure and are fixedly connected by adopting a low heat conduction structure, so that the temperature of the outer surface is not too high due to heat conduction, and when the temperature in the furnace reaches the highest working temperature according to the structure, the temperature rise of the outer wall of the furnace body 1 is not more than the ambient temperature and is less than 5 ℃.

Referring to fig. 5, in this embodiment, a plurality of air heating circulation zones are arranged inside the furnace body 1, an air heating circulation system is arranged in each air heating circulation zone, each air heating circulation system includes a circulation fan 5 located at the top of the inner side of the furnace body 1, and air ducts 3 are arranged on two sides of each circulation fan 5 and communicated with well air ports of the air ducts 3; the air channels 3 are respectively arranged at two sides in the furnace body 1; in order to match a large-size vulcanizing furnace and quickly realize constant temperature in the furnace, in the scheme, a furnace body 1 is internally distributed into a plurality of air heating circulation zones, each air circulation zone is provided with an air heating circulation system, and the air circulation heating system mainly comprises an electric heating module 4, a circulation fan 5, a circulation air duct 3, a bottom side air outlet device, a temperature control system and the like; heating modules 4 are symmetrically and uniformly arranged on two sides of each subarea of the furnace top, the modular heating device is convenient to install and disassemble, the heating modules 4 are designed into a modular structure, are installed in an interlayer at the top of the furnace body 1 and are connected with an outlet of the circulating fan 5 and the circulating air duct 3 to form a heating channel communicated in a closed mode, and the heating channel has the advantages of being convenient to install and wire and easy to operate. In this embodiment, 4 partition bilateral symmetry arrange, totally 8 heating modules 4, and heating module 4 is preferred to be built-in stainless steel fin formula far-infrared electric heating pipe.

The circulating fan 5 is a multi-blade centrifugal type double-output low-noise customized fan, is large in air volume and low in noise, can be suitable for being used in a hot blast furnace below 200 ℃ for a long time, does not have scraping and abnormal vibration and does not need any cooling liquid, and the fan and the bearing are designed in a high-efficiency maintenance-free mode, so that convenience and rapidness in use and maintenance are guaranteed. The fan main part is embedded in the interlayer at the top of the furnace body 1, and the motor is arranged externally, so that the heat transfer is avoided, and the use efficiency of the fan is improved.

In the above scheme, aiming at ensuring the heating uniformity and temperature difference controllability of each position in the furnace body 1, in this embodiment, the heating partition of the furnace body 1 is set to 4 temperature control areas, each area is composed of 2 independent heating modules 4, 1 thermal cycle fan 5 and 2 air channels 3, and the corresponding temperature control unit can automatically adjust the heating power through the power regulator to reach the preset temperature value when the temperature value of any area does not reach the standard.

In the working process, the heating program of the large-size vulcanizing furnace equipment is that the circulating fan 5 is started preferentially, the heating system is started in a delayed mode, the heating system is closed preferentially, the circulating fan 5 is closed in a delayed mode, and the heating program and the heating system are in a linkage relation; when the fan is not started, the heating system can not work, and the phenomenon that the heating pipe is dry-burned to damage equipment can not occur.

Referring to fig. 5, in the present embodiment, a plurality of louver openings 6 are disposed at the air outlets of the air ducts 3; the circulating air duct 3 is divided into 4 areas, and each area is symmetrically arranged; the air duct 3 is embedded in the inner parts of two sides of the furnace body 1; a shutter air outlet device is arranged on the lower side of the inner wall of the furnace body 1, and the hot air in the furnace circularly flows to realize the heat exchange process by air supply from the top air suction side and the bottom side; the design of the air outlets of the louver can well ensure the uniformity of the temperature in the furnace, the side air outlets are correspondingly and symmetrically distributed in a partition mode, the maximum area of the air outlets is about 15 square meters, the heat conduction of heat on a workpiece is realized by hot air through the air uniformizing outlet device, and the special adjusting tool matched with the side air uniformizing device is convenient for adjusting the air outlets.

Referring to fig. 2 and 5, in the present embodiment, the air exhaust system includes an air inlet duct and an air exhaust duct, and the air inlet duct is disposed at the top of the outer side of the furnace body 1 and is communicated with the circulating fan 5; the exhaust pipeline is positioned outside the furnace body 1 and communicated with the interior of the furnace body 1, and an exhaust fan 7 is arranged on the exhaust pipeline; the air inlet pipeline and the exhaust pipeline are both provided with one-way valves; in order to discharge harmful gases such as sulfide, hydride and the like contained in the furnace body 1, the scheme is also provided with an air exhaust system, the harmful gases can be sent into a desulfurizing tower 8 for treatment, and the workpiece and the furnace body 1 are cooled, in the specific scheme, an air inlet pipeline communicated with a circulating fan 5 is arranged, a one-way valve is arranged on the air inlet pipeline, and after the vulcanizing treatment of the workpiece by a large-size vulcanizing furnace is completed and the harmful gases such as sulfide, hydride and the like are discharged, the one-way scavenging valve is opened, so that fresh air enters the large-size vulcanizing furnace from a circulating air duct 3 in each area through the device, then an exhaust fan 7 is opened, and the harmful gases are sent into the desulfurizing tower 8 for treatment through the exhaust fan 7; and fresh air is introduced, so that the temperature in the large-size vulcanizing furnace and the temperature of workpieces can be reduced. The air exhaust system is arranged at the top of the large-size vulcanizing furnace, and is pneumatically controlled, so that the operation is convenient; the furnace body further comprises an exhaust collecting pipe 10 arranged on the inner side of the furnace body 1, wherein the exhaust collecting pipe 10 is communicated with each partitioned air channel 3 and connected to an exhaust pipeline for exhausting gas in each air channel 3.

In the above scheme, because this vulcanizing furnace body 1 structure is all metal, because the metal absorbs in a large amount of heats short time and is difficult to release completely when the low temperature section, so can cause even turn-off a large amount of metal parts overtemperature partial heat will continue to release and cause the temperature runaway phenomenon in the whole stove behind the heating module 4, open the air exhaust system right amount this moment and get into cold wind and can synthesize the heat of overshooting.

In this embodiment, the inlet end of the exhaust duct and the inner side of the furnace body 1 are both provided with a harmful gas concentration detection sensor; an oxygen concentration detection sensor is also arranged in the furnace body 1; the detection is carried out through a harmful gas concentration detection sensor, data are transmitted to a human-computer interface of a control system, a harmful gas concentration low limit value is arranged at the control system, and when the harmful gas concentration is higher than the low limit value, the lifting furnace door 9 cannot be opened and is in a locking state, so that the safety of operators is ensured; in the vulcanizing process, the concentration of harmful gas in the furnace is too high to exceed a set value, the purification system automatically operates, and the treatment air volume at the moment can not cause the fluctuation of the temperature in the furnace. An oxygen concentration detection sensor is also arranged in the furnace body 1, and after the vulcanization process is finished, when the concentration of harmful gas in the furnace is lower than a set value, the furnace door can be opened (when the concentration of the harmful gas does not reach the standard, the system automatically locks a furnace door switch). When the furnace door is opened, the exhaust fan 7 runs at full power, so that the gas in the furnace is prevented from escaping outwards, and the oxygen content in the furnace is ensured to be sufficient and safe.

In this embodiment, the exhaust gas purification treatment system includes a desulfurizing tower 8, and the desulfurizing tower 8 is used for receiving the gas exhausted by the draft exhaust system.

In this embodiment, the heating system further includes a temperature control system, a temperature sensor is disposed in the air duct 3, and the temperature control system is configured to receive data of the temperature sensor and control power of the heating module 4; in order to control the temperature in the furnace body 1, the scheme is also provided with a temperature control system, wherein the temperature control system comprises a PID intelligent constant temperature control mode which adopts an imported brand temperature controller to match with a three-phase silicon controlled power regulator and a high-precision thermocouple to heat equipment in the furnace, the heat preservation time can be set according to the process requirements (0-80 hours), and the heating process can be controlled in a programmable way; each temperature control area is provided with an independent temperature control meter, and the whole system is provided with 1 independent alarm. The accuracy of the instrument is 0.3 grade, and the temperature sensor is Pt100 industrial grade A; and 2 temperature sensors are arranged at appropriate positions of each corresponding subarea in the large-size vulcanizing furnace for controlling and monitoring the real-time temperature of each area in the furnace.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A large size hermetically sealed vulcanization furnace, comprising:

the furnace body (1), the said furnace body (1) is the hermetically-sealed construction, the said furnace body (1) opening has over-and-under type furnace doors (9);

the air heating circulation system comprises an air channel (3) arranged on the inner side of the furnace body (1), a heating module (4) for heating air is arranged in the air channel (3), and an air inlet and an air outlet of the air channel (3) are respectively arranged at the top and below the furnace body (1); a circulating fan (5) is arranged at the air inlet;

the air exhaust system is used for exhausting outside air into the air duct (3) of the furnace body (1) and exhausting gas in the furnace body (1);

and the waste gas purification treatment system is positioned outside the furnace body (1) and is used for receiving the gas exhausted by the air draft exhaust system.

2. The large-size sealed vulcanizing furnace according to claim 1, wherein the furnace body (1) comprises a shell (11) and a steel structural frame (2), the top layer of the steel structural frame (2) is of a double-layer beam structure, and an installation space is reserved between the double-layer beam structure; the shell (11) is coated on the outer side of the steel structure frame (2).

3. The large-size sealed vulcanizing furnace as claimed in claim 2, wherein the steel structural frame (2) is formed by splicing a plurality of rectangular pipes, a heat insulation material is laid between the outer shell (11) and the steel structural frame (2), and the rectangular pipes are filled with the heat insulation material.

4. The large-size sealed vulcanizing furnace according to claim 1, wherein a plurality of air heating circulation zones are arranged in the furnace body (1), an air heating circulation system is arranged in each air heating circulation zone, each air heating circulation system comprises a circulating fan (5) which is positioned at the top of the inner side of the furnace body (1), and an air duct (3) is arranged on each side of each circulating fan (5) and is communicated with an air inlet of the air duct (3); the air ducts (3) are respectively arranged on two sides inside the furnace body (1).

5. A large-size sealed vulcanizing furnace according to claim 4, wherein the air outlets of a plurality of air ducts (3) are provided with louver openings (6).

6. The large-size sealed vulcanizing furnace as claimed in claim 1, wherein the air draft exhaust system comprises an air inlet pipeline and an exhaust pipeline, the air inlet pipeline is arranged at the top of the outer side of the furnace body (1) and is communicated with the circulating fan (5); the exhaust duct is positioned outside the furnace body (1) and communicated with the interior of the furnace body (1), and an exhaust fan (7) is arranged on the exhaust duct.

7. A large size sealed vulcanization furnace according to claim 6, wherein the air inlet duct and the air outlet duct are provided with check valves.

8. The large-size sealed vulcanizing furnace according to claim 6, wherein the inlet end of the exhaust pipeline and the inner side of the furnace body (1) are provided with harmful gas concentration detection sensors; an oxygen concentration detection sensor is also arranged in the furnace body (1).

9. The large-size sealed vulcanization furnace of claim 1, characterized in that the exhaust gas purification treatment system comprises a desulfurization tower (8), and the desulfurization tower (8) is used for receiving gas exhausted by the induced draft exhaust system.

10. The large-size hermetically sealing furnace according to claim 1, further comprising a temperature control system, wherein a temperature sensor is arranged in the air duct, and the temperature control system is used for receiving data of the temperature sensor and controlling the power of the heating module (4).

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