Fire extinguishing device of oxidation furnace and carbon fiber production line

Abstract

The utility model discloses a fire extinguishing device of an oxidation furnace and a carbon fiber production line, and the fire extinguishing device comprises the oxidation furnace which is provided with an oxidation cavity and a furnace mouth communicated with the oxidation cavity and is used for introducing fibers into the oxidation cavity or penetrating out of the oxidation cavity; and the water spraying module is arranged outside the oxidation cavity and is used for spraying water to a furnace mouth of the oxidation furnace. According to the fire extinguishing device, water is sprayed to the furnace mouth of the oxidation furnace through the water spraying module, the temperature of the furnace mouth can be reduced, flames are prevented from spreading outwards from the furnace mouth, water can be sprayed to fibers at the furnace mouth, the flames are prevented from outwards leading out the fibers in the fiber discharging area, and the fibers after water spraying can carry water vapor to enter the oxidation furnace; and the temperature in the furnace is reduced to a certain extent, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The utility model belongs to the field of fiber production, and specifically relates to a fire extinguishing device for an oxidation furnace and a carbon fiber production line. Background Art

[0002] Carbon fiber is a high-end chemical fiber variety, and its preparation process includes firing of fibers such as viscose, acrylic, aramid, and polyimide at high temperatures. Among these, pre-oxidation is a very important link.

[0003] Pre-oxidation refers to the process of exposing the raw silk to oxygen for heat treatment before it is converted into carbon fiber. The main reactions during pre-oxidation are cyclization, oxidation, and dehydrogenation, all of which are exothermic reactions. And the furnace is always at a process temperature of 200°C - 300°C, so heat accumulation and overheating are likely to occur inside the fiber, which may cause the melting of single filaments at least and black smoke at worst, and even cause ignition, leading to deflagration, seriously threatening the personal safety of front-line production employees.

[0004] The current fire extinguishing devices for oxidation furnaces are all installed inside the furnace. However, the flame propagation speed of deflagration is generally 1000 - 3000 m / s. That is, before the flame is extinguished, the deflagration flame will spray out from the furnace mouth of the oxidation furnace, and it is difficult for the on-site personnel to react in time, increasing the safety hazards for the on-site personnel; and the raw silk is a flammable substance, and the flame spraying out from the furnace mouth tends to spread to the wire feeding area. It is often too late to use a fire extinguisher to extinguish the flame at the furnace mouth, presenting greater safety hazards.

[0005] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0006] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art. The purpose is to provide a fire extinguishing device for an oxidation furnace, which sprays water at the furnace mouth of the oxidation furnace through a water spraying module, can reduce the temperature at the furnace mouth, prevent the flame from spreading outwards from the furnace mouth, can also spray water on the fibers at the furnace mouth to prevent the flame from igniting the fibers in the wire feeding area outside, and can also make the fibers carry water vapor into the furnace after spraying water, having a certain effect of reducing the temperature inside the furnace.

[0007] Another purpose of the present utility model is to provide a carbon fiber production line.

[0008] To solve the above technical problems, the basic concept of the technical solution adopted by the present utility model is: to provide a fire extinguishing device for an oxidation furnace, including:

[0009] An oxidation furnace, having an oxidation chamber and a furnace mouth communicating with the oxidation chamber, for introducing fibers into the oxidation chamber or passing them out from the oxidation chamber;

[0010] The water spraying module is arranged outside the oxidation chamber and is used for spraying water at the furnace mouth of the oxidation furnace.

[0011] Furthermore, the water spraying module includes a spraying unit which is arranged outside the furnace mouth end of the oxidation furnace and is used for spraying water flow outside the oxidation furnace to form a water curtain opposite to and close to the furnace mouth.

[0012] Furthermore, the spraying unit includes a plurality of spray heads which are arranged at intervals outside the furnace mouth end of the oxidation furnace, and the plurality of water outlet waterways of the plurality of spray heads are arranged close to the furnace mouth and are used for spraying to form a water curtain close to the furnace mouth outside the oxidation furnace.

[0013] Furthermore, the water spraying module includes a spraying mist unit which is arranged outside the furnace mouth end of the oxidation furnace and is used for spraying mist to cool down the fibers at the furnace mouth.

[0014] Furthermore, the furnace mouth includes an inlet and an outlet which are respectively arranged on the side walls at opposite ends of the oxidation furnace, and the water spraying module is arranged on both sides outside the two furnace mouth ends of the oxidation furnace and is located on the outer periphery of the furnace mouth.

[0015] Furthermore, the water spraying module is located above the furnace mouth, and the water outlet of the water spraying module is arranged downward.

[0016] Furthermore, it further includes a water supply pipe which is arranged outside the oxidation furnace, and a part of it extends horizontally above the oxidation furnace and extends to above the two furnace mouth ends, and the water spraying module is communicated with the water supply pipe;

[0017] A water storage tank is arranged outside the oxidation furnace, the water outlet is connected with the water supply pipe, and a control valve is arranged at the water inlet.

[0018] Furthermore, it further includes

[0019] A temperature detection module is arranged inside the oxidation chamber and is used for detecting the temperature inside the oxidation chamber;

[0020] A control module is respectively connected with the temperature detection module and the water spraying module, and is used for controlling the water spraying module to spray water at the furnace mouth when the detected temperature exceeds the preset range.

[0021] Furthermore, it further includes a fire extinguishing module which is arranged inside the oxidation chamber and is connected with the control module and is used for receiving a control instruction to cool down and extinguish the fire inside the oxidation furnace.

[0022] The present utility model also provides a production line for carbon fibers, which has a fire extinguishing device for an oxidation furnace as described in any one of the above.

[0023] After adopting the above technical solutions, the present utility model has the following beneficial effects compared with the prior art.

[0024] (1) The fire extinguishing device of the present utility model is provided with a water spraying module outside the oxidation chamber of the oxidation furnace. When the temperature inside the oxidation furnace exceeds the limit, water can be sprayed through the water spraying module at the furnace mouth of the oxidation furnace, which can reduce the temperature at the furnace mouth, prevent the flame from spreading outward from the furnace mouth, and can also spray water on the fibers at the furnace mouth to avoid the flame from igniting the fibers in the spinning area outside. Moreover, the fibers after water spraying can carry water vapor into the oxidation chamber, which has a certain effect of reducing the temperature in the oxidation chamber. The structure is simple and the cost is low.

[0025] (2) The present utility model is provided with a spraying unit outside the furnace mouth end of the oxidation furnace, and the water curtain formed by the sprayed water is relatively close to the furnace mouth. The water curtain can cover the furnace mouth and can block the internal flame from spraying outward from the furnace mouth when deflagration occurs in the oxidation chamber, avoiding igniting the fibers stored outside or causing harm to the staff.

[0026] The following further describes in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. Description of the Drawings

[0027] The accompanying drawings, as a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0028] Figure 1 is a schematic diagram of a fire extinguishing device for an oxidation furnace of the present utility model;

[0029] Figure 2 is a schematic diagram of a fire extinguishing device for an oxidation furnace of the present utility model;

[0030] Figure 3 is a schematic diagram of another fire extinguishing device for an oxidation furnace of the present utility model;

[0031] Figure 4 is a schematic diagram of a fire extinguishing module of the present utility model.

[0032] In the figures: 1. Oxidation furnace; 11. Oxidation chamber; 12. Furnace mouth; 2. Water spraying module; 21. Spraying unit; 22. Spraying unit; 23. Water supply pipe; 24. Water storage tank; 25. Control valve; 3. Fibers; 4. Fire extinguishing module; 41. Water supply channel; 42. Automatic switching valve; 43. Manual switching valve; 44. Connecting pipe; 45. Drain valve; 46. Fixing member.

[0033] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present utility model in any way, but rather to illustrate the concept of the present utility model to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] As Figures 1 to 4 shown, the present utility model also provides an oxidation furnace 1 for fibers 3, a fire extinguishing device used during the pre-oxidation or oxidation of fibers 3.

[0038] As Figures 1 to 2 shown, the fire extinguishing device includes an oxidation furnace 1 and a water spraying module 2.

[0039] The oxidation furnace 1 has an oxidation chamber 11, and the oxidation chamber 11 is provided with a furnace opening 12 communicating with the inside, for introducing the fibers 3 into the oxidation chamber 11 and passing through the oxidation chamber 11. The fibers 3 can be pulled by an external traction roller, enter the oxidation chamber 11 from one furnace opening 12 for high-temperature pre-oxidation, and then be led out from the other furnace opening 12. The water spraying module 2 is arranged outside the oxidation chamber 11 for spraying water at the furnace opening 12 of the oxidation furnace 1.

[0040] The fire extinguishing device of the present utility model is provided with a water spraying module 2 outside the oxidation chamber 11 of the oxidation furnace 1. When the temperature inside the oxidation furnace 1 exceeds the limit, water can be sprayed to the furnace mouth 12 of the oxidation furnace 1 through the water spraying module 2, which can reduce the temperature at the furnace mouth 12, prevent the flame from spreading outwards from the furnace mouth 12, and can also spray water on the fiber 3 at the furnace mouth 12. Moreover, the water vapor-carrying fiber 3 after spraying water can enter the oxidation chamber 11, which has a certain effect of reducing the temperature inside the oxidation chamber 11. The structure is simple and the cost is low.

[0041] There is a blower chamber adjacent to the oxidation chamber 11 inside the oxidation furnace 1.

[0042] The blower chamber is provided with a blower and a heater. After the blower introduces air from the outside and heats it through the heater, the air is introduced into the oxidation chamber 11. The hot air circulates between the blower chamber and the oxidation chamber 11, continuously heating and oxidizing the fiber 3. The generated waste gas circulates to the blower chamber and is discharged outside the oxidation furnace 1 from the blower chamber.

[0043] As Figure 2 shown, the water spraying module 2 includes a spraying unit 21. The spraying unit 21 is arranged outside the furnace mouth end of the oxidation furnace 1 and is used to spray water flow outside the oxidation furnace 1 to form a water curtain opposite to and close to the furnace mouth 12.

[0044] In the present utility model, by arranging the spraying unit 21 outside the furnace mouth end of the oxidation furnace 1, a water curtain is formed by spraying water. The water curtain is arranged opposite to and close to the furnace mouth 12, and the water curtain can cover the furnace mouth 12. When deflagration occurs inside the oxidation chamber 11, the water curtain can block the internal flame from spraying outwards from the furnace mouth 12, avoiding igniting the fiber 3 stored outside or causing harm to the staff.

[0045] The spraying unit 21 can be arranged outside the oxidation furnace 1, can be arranged on the outer wall of the oxidation furnace 1, the water outlet waterway is approximately parallel to the plane where the furnace mouth 12 is located and is located outside the furnace mouth 12; it can also be arranged in the interlayer between the oxidation chamber 11 and the oxidation furnace 1, the water outlet is directed towards the middle of the furnace mouth 12, and the water outlet waterway is located inside the furnace mouth 12.

[0046] Preferably, the spraying unit 21 includes a plurality of spray heads arranged at intervals outside the furnace mouth end of the oxidation furnace 1. The plurality of water outlet waterways of the plurality of spray heads are arranged close to the furnace mouth 12 and are used to spray water outside the oxidation furnace 1 to form a water curtain close to the furnace mouth 12, which can block the furnace mouth 12 with the water curtain and prevent the flame from spraying outwards from the furnace mouth 12.

[0047] Preferably, the plurality of water outlet waterways are arranged side by side in a planar shape, and the maximum width of the side-by-side arrangement is greater than the inner diameter of the furnace mouth 12, which can cover the outer circumference of the furnace mouth 12. The intervals between the water outlet waterways are very small, or the plurality of water outlet waterways are connected to form a water curtain that is uninterrupted in the width direction.

[0048] The water spraying module 2 further includes a spraying unit 22. The spraying unit 22 is arranged outside the furnace mouth end of the oxidation furnace 1 and is used for spraying and cooling the fiber 3 at the furnace mouth 12.

[0049] When the temperature inside the oxidation chamber 11 is greater than or equal to the preset temperature K1, at this time, the temperature inside the oxidation chamber 11 is slightly high and has not reached the level of ignition or deflagration. The spraying unit 22 can be controlled to work to spray the fiber 3 at the furnace mouth 12, which can wet the fiber 3, reduce the temperature of the fiber 3 here, and also enable the fiber 3 at the inlet to carry water vapor into the oxidation furnace 1, reduce the temperature inside the oxidation furnace 1, and reduce the possibility of ignition inside the oxidation furnace 1.

[0050] When the temperature inside the oxidation chamber 11 further rises and the furnace temperature is greater than or equal to the preset temperature K2, K1 < K2, at this time, the temperature inside the oxidation chamber 11 is over-temperature and there is a risk of deflagration. The spraying unit 21 is controlled to spray water to form a water curtain approximately parallel to the furnace mouth 12. On the one hand, it reduces the temperature of the fiber 3 at the furnace mouth 12, and on the other hand, it blocks the internal flame or deflagration of the oxidation furnace 1 from spraying outwards, avoiding igniting the fiber 3 in the external wire feeding area and preventing injury to the staff.

[0051] The spraying unit 21 can cooperate with the spraying unit 22 to avoid damage to external personnel and the fiber 3 stored externally due to over-temperature inside the oxidation furnace 1.

[0052] In a specific scheme, the spraying unit 21 is located between the furnace mouth 12 and the spraying unit 22, that is, the spraying unit 22 is farther from the furnace mouth 12 of the oxidation furnace 1 than the spraying unit 21.

[0053] In another specific scheme, the spraying unit 21 and the spraying unit 22 are arranged side by side and at the same height, and have the same linear distance from the furnace mouth end.

[0054] Preferably, the spraying unit 22 is a spray head, which can be one or more spray heads. The spray head is arranged outside the furnace mouth 12, and the water outlet of the spray head can be inclined downward, vertically downward, or horizontally, all facing the direction of the furnace mouth 12.

[0055] Furthermore, the furnace mouth 12 includes an inlet and an outlet. The inlet and the outlet are respectively arranged on the side walls at opposite ends of the oxidation furnace 1 and are used to introduce the fiber 3 into the oxidation chamber 11 and export the pre-oxidized fiber 3 from the oxidation chamber 11. The water spraying module 2 is arranged on both sides outside the two furnace mouth ends of the oxidation furnace 1 and is located on the outer periphery of the furnace mouth 12. That is, the two furnace mouth ends of the oxidation furnace 1 are located between the two water spraying modules 2.

[0056] The water spraying module 2 is arranged outside the side wall of the oxidation furnace 1 with a furnace opening 12, and there is a set distance between the water spraying module 2 and the side wall of the oxidation furnace 1 with the furnace opening 12.

[0057] The spraying units 21 are respectively arranged outside the side walls of the oxidation furnace 1 with an inlet and an outlet. The spraying unit 22 can be arranged only outside the side wall of the oxidation furnace 1 with an inlet, or can be respectively arranged outside the side walls of the oxidation furnace 1 with an inlet and an outlet.

[0058] The water spraying module 2 is located above the furnace opening 12, and the water outlet of the water spraying module 2 is arranged downward. The water outlets of the spraying units 21 are arranged vertically downward to form a vertically arranged water curtain, and the projection of the furnace opening 12 in the horizontal direction is located within the water curtain.

[0059] Preferably, the water spraying module 2 is arranged above the oxidation furnace 1 and is arranged at the top near the furnace opening end of the oxidation furnace 1.

[0060] The fire extinguishing device further includes a water supply pipe 23 and a water storage tank 24.

[0061] The water supply pipe 23 is arranged outside the oxidation furnace 1. The water supply pipe 23 extends horizontally in part above the oxidation furnace 1 and extends above the two furnace opening ends. Two water spraying modules 2 are respectively communicated with the water supply pipe 23, and the spraying unit 22 and the spraying units 21 of each water spraying module 2 are all communicated with the water supply pipe 23.

[0062] The water storage tank 24 is arranged outside the oxidation furnace 1. The water outlet of the water storage tank 24 is connected with the water supply pipe 23. The water inlet of the water storage tank 24 is communicated with the tap water pipeline. A control valve 25 is arranged at the water inlet of the water storage tank 24 for feeding water into the water storage tank 24 after connection or stopping feeding water after disconnecting the connection.

[0063] Preferably, a water pump is arranged at the outlet of the water storage tank 24 for pumping the water in the water storage tank 24 into the water supply pipe 23. The spray nozzles and the spraying nozzles have electronic control valves and can receive instructions to control the opening and closing of the spray nozzles and the spraying nozzles.

[0064] The water storage tank 24 can be placed on the ground. One end of the water supply pipe 23 extends upward from the water outlet of the water storage tank 24 to protrude above the oxidation furnace 1, and the other end continues to extend horizontally above the oxidation furnace 1 and passes through the two furnace opening ends of the oxidation furnace 1 in sequence.

[0065] The fire extinguishing device further includes a temperature detection module and a control module.

[0066] The temperature detection module is disposed inside the oxidation chamber 11 for detecting the temperature inside the oxidation chamber 11. The control module is disposed outside the oxidation furnace 1 and is respectively connected to the temperature detection module and the water spraying module 2, and is configured to obtain the temperature detected by the temperature detection module, determine whether the detected temperature exceeds a preset range, and if so, control the water spraying module 2 to spray water at the furnace mouth 12.

[0067] When the temperature detection module detects that the temperature inside the furnace is greater than or equal to K1 and less than K2, the control module determines that the detected temperature reaches the preset temperature K1, and then controls the spraying unit 22 of the water spraying module 2 to operate to spray the fiber 3 at the furnace mouth 12.

[0068] When the temperature detection module detects that the temperature inside the furnace is greater than or equal to K2, the control module determines that the detected temperature reaches the preset temperature K2, and then controls the spraying unit 21 of the water spraying module 2 to operate to spray and form a water curtain at the furnace mouth 12 to prevent the flame inside the furnace from spreading outwards or bursting and spraying. It is automatically controlled by the control module, with sensitive reaction. When a fire breaks out inside the oxidation furnace 1, the water spraying module 2 is activated immediately to prevent the bursting flame from spraying out and causing personal injury.

[0069] As Figure 3 shown, the fire extinguishing device of the present utility model further includes a fire extinguishing module 4. The fire extinguishing module 4 is disposed inside the oxidation chamber 11, and the fire extinguishing module 4 is connected to the control module and is configured to receive a control instruction to cool down and extinguish the fire inside the oxidation furnace 1.

[0070] Specifically, the temperature detection module detects the temperature inside the oxidation furnace 1, the control module obtains the detected temperature, and determines whether the detected temperature is greater than or equal to a preset temperature K3. If so, the control module controls the fire extinguishing module 4 to operate for fire extinguishing, where K1 ≤ K3 ≤ K2.

[0071] The fire extinguishing module 4 can be water spraying for fire extinguishing or using other substances for fire extinguishing.

[0072] As Figure 4 shown, the fire extinguishing module 4 is water spraying for fire extinguishing. The fire extinguishing module 4 includes a water supply channel 41, an automatic switching valve 42, and a manual switching valve 43.

[0073] The water supply channel 41 is configured to supply water to the inside of the oxidation furnace 1.

[0074] The automatic switching valve 42 is connected in series on the water supply channel 41 and is communicatively connected to the control module of the fire extinguishing module 4, and is configured to receive an instruction from the control module to control the opening and closing of the water supply channel 41.

[0075] The manual switching valve 43 and the automatic switching valve 42 are connected in parallel between the water inlet end and the water outlet end of the water supply channel 41. The water inlet end, the manual switching valve 43 and the automatic switching valve 42 of the water supply channel 41 are connected to form a tee pipeline. When supplying water, the manual switching valve 43 is opened to let water in, and the water outlet end of the water supply channel 41 discharges water for fire extinguishing.

[0076] Preferably, the pipeline between the water inlet end and the water outlet end of the water supply channel 41 is set to be concave, and the automatic switching valve 42 is arranged at the bottom of the concave part of the water supply channel 41.

[0077] The water supply channel 41 includes a connecting pipe 44, which is arranged above the automatic switching valve 42. The connecting pipe 44 is connected between the water inlet end and the water outlet end of the concave part of the water supply channel 41. The manual switching valve 43 is arranged on the connecting pipe 44.

[0078] By arranging the automatic switching valve 42 on the concave part of the water supply channel 41, adding a connecting pipe 44 communicating with the concave part above the automatic switching valve 42, and arranging the manual switching valve 43 on the connecting pipe 44, the present utility model can not only reduce the volume of the water supply channel 41, thereby saving the occupied space of the pipeline and facilitating its arrangement on the outer wall of the oxidation furnace 1, but also, due to the setting positions of the manual switching valve 43 and the automatic switching valve 42, when the manual switching valve 43 is opened, water can quickly flow through the pipeline where the manual switching valve 43 is located above, flow to the connecting pipe 44 and then to the spray head or atomizing head, facilitating quick water discharge for fire extinguishing.

[0079] A specific implementation is that the water supply channel 41 further includes a U-shaped pipe.

[0080] The connecting pipe 44 is connected between the middle parts of the two vertical pipes of the U-shaped pipe. The automatic switching valve 42 is arranged at the bottom of the vertical pipe section of the U-shaped pipe.

[0081] The parallel pipeline where the manual switching valve 43 is located is the connecting pipe 44, and the parallel pipeline where the automatic switching valve 42 is located is the U-shaped pipe below the connecting pipe 44.

[0082] A drain valve 45 that can be opened and closed is provided at the bottommost part of the U-shaped pipe for discharging the water in the water supply channel 41 after being opened, with a compact structure.

[0083] Preferably, the fire extinguishing module 4 includes two water supply channels 41 fixedly connected side by side and a fixing member 46. The two water supply channels 41 fixedly connected side by side are arranged on an outer side wall of the oxidation cavity 11 of the oxidation furnace 1.

[0084] The water inlet ends of the two water supply channels 41 are respectively communicated with a water supply source. The fixing member 46 is horizontally connected between the outer walls of the adjacent vertical pipelines at the water inlet ends of the two water supply channels 41 for fixing the water supply channels 41.

[0085] The water supply channel 41 can utilize the same water supply source as the water supply pipe 23.

[0086] The above are only the preferred embodiments of the present invention, and do not impose any formal restrictions on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, may make some modifications or decorations by using the technical content prompted above into equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and decoration made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A fire extinguishing device for an oxidation furnace, characterized in that: include: An oxidation furnace having an oxidation chamber and a furnace opening connected to the oxidation chamber, for introducing the fiber into the oxidation chamber and passing the fiber out of the oxidation chamber; The water spray module is arranged outside the oxidation chamber and is used for spraying water to the furnace mouth of the oxidation furnace.

2. A fire extinguishing device for an oxidation furnace according to claim 1, characterized in that: The water spray module comprises a spray unit, which is arranged outside the furnace mouth end of the oxidation furnace and is used for spraying water flow outside the oxidation furnace to form a water curtain opposite to and close to the furnace mouth.

3. A fire extinguishing device for an oxidation furnace according to claim 2, characterized in that: The spray unit includes a plurality of spray heads arranged at intervals outside the furnace mouth end of the oxidation furnace, and a plurality of water outlet waterways of the plurality of spray heads are arranged close to the furnace mouth for spraying outside the oxidation furnace to form a water curtain close to the furnace mouth.

4. A fire extinguishing device for an oxidation furnace according to claim 2, characterized in that: The water spray module comprises a spray unit, which is arranged outside the furnace mouth end of the oxidation furnace and is used for spraying cooling water to the fibers at the furnace mouth.

5. A fire extinguishing device for an oxidation furnace according to any one of claims 2 to 4, characterized in that: The furnace mouth includes an inlet and an outlet, which are respectively arranged on the side walls at opposite ends of the oxidation furnace. The water spray module is arranged outside the two sides of the furnace mouth ends of the oxidation furnace and is located at the periphery of the furnace mouth.

6. A fire extinguishing device for an oxidation furnace according to claim 5, characterized in that: The water spray module is located above the furnace opening, and the water outlet of the water spray module is arranged downward.

7. A fire extinguishing device for an oxidation furnace according to claim 6, characterized in that: It also includes a water supply pipe, which is arranged outside the oxidation furnace, partially extending horizontally above the oxidation furnace and extending to above the two furnace mouth ends, and the water spray module is connected to the water supply pipe; The water storage tank is arranged outside the oxidation furnace, the water outlet is connected to the water supply pipe, and a control valve is arranged at the water inlet.

8. A fire extinguishing device for an oxidation furnace according to any one of claims 1 to 4, characterized in that: Also includes A temperature detection module, disposed in the oxidation chamber, for detecting the temperature in the oxidation chamber; The control module is connected to the temperature detection module and the water spray module respectively, and is used to control the water spray module to spray water at the furnace mouth when the detected temperature exceeds a preset range.

9. A fire extinguishing device for an oxidation furnace according to claim 8, characterized in that: It also includes a fire extinguishing module, which is arranged in the oxidation chamber and connected to the control module, and is used to receive control instructions to cool down and extinguish the fire in the oxidation furnace.

10. A carbon fiber production line, characterized in that: A fire extinguishing device for an oxidation furnace according to any one of claims 1 to 9.

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