Waste gas recovery device for fire resistance test furnace of fireproof door and roller shutter door

Abstract

The utility model relates to the technical field of fireproof door and roller shutter door production detection equipment, and discloses a fireproof door and roller shutter door fire resistance test furnace waste gas recovery device which comprises a furnace body, one side of the furnace body is fixedly connected with a conveying pipe, and the other end of the conveying pipe is fixedly connected with a spiral pipeline. The outer part of the spiral pipeline is fixedly connected with a pre-cooling box, the outer part of the spiral pipeline is fixedly connected with a plurality of buffer pads, the outer parts of the buffer pads are fixedly connected with a catalyst bed layer, one side of the pre-cooling box is fixedly connected with a water conveying assembly for conveying a water pipe, and one end of the water conveying assembly is fixedly connected with an atomizing nozzle. The spiral pipeline can preliminarily cool and wet waste gas, the catalyst bed layer can accelerate oxidation reaction of harmful substances, the combustion tank can ensure sufficient temperature to promote complete combustion, the heat exchanger can recycle high-temperature flue gas, the design can adapt to various different complex mixed gas, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to fireproof door and rolling shutter door production detection equipment technical field especially relates to a fireproof door and rolling shutter door fire resistance test furnace waste gas recovery device. BACKGROUND

[0002] With the continuous improvement of the building industry's requirements for fire safety, as important fire isolation facilities, the fire resistance of fireproof doors and rolling shutter doors directly affects the safety performance of buildings. Therefore, the quality inspection of these products is particularly important. When performing fire resistance tests, a large amount of toxic and harmful gases will be generated inside the test furnace. If not properly handled, it not only pollutes the environment, but also may harm the health of the operators.

[0003] After searching, the Chinese patent publication No. CN219869117U discloses a fireproof door and rolling shutter door fire resistance test furnace with waste gas treatment structure, which includes a furnace body and a door leaf fixing device. The furnace body is a rectangular structure with an opening on the front. The door leaf fixing device includes a square fixing frame, the size of which is adapted to the opening of the furnace body. The fixing frame is provided with a door hole for fixing the door leaf. The fixing frame is detachably connected with the furnace body. The utility model sets the furnace body and the door leaf fixing device in a split type. During the test, the door leaf is fixed by the door leaf fixing device and then pushed horizontally to connect with the furnace body. After the test, when the temperature in the furnace body decreases to room temperature, the door lock is loosened, and the door leaf fixing device is pushed out. For different test workpieces, the replacement is simple, convenient and fast, and the test component does not need to be lifted. By setting the flue gas treatment assembly, the waste gas after combustion in the furnace body can be cooled and discharged, avoiding the direct discharge of high-temperature waste gas into the air, which is harmful to human health.

[0004] The above patent specification mentions that "during the test, the door leaf is fixed by the door leaf fixing device and then pushed horizontally to connect with the furnace body. After the test, when the temperature in the furnace body decreases to room temperature, the door lock is loosened, and the door leaf fixing device is pushed out. For different test workpieces, the replacement is simple, convenient and fast, and the test component does not need to be lifted." Although the above patent is simple, convenient and fast for replacing different test workpieces, and the test component does not need to be lifted, it cannot effectively deal with complex mixed gases in the subsequent waste gas recovery stage, and the application range is narrow. Therefore, a building material fire resistance test furnace device is proposed. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a fireproof door and rolling shutter door fire resistance test furnace waste gas recovery device, which aims to improve the problem that the existing technology cannot effectively deal with complex mixed gases and has a narrow application range.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A fire door and roller shutter door fire resistance test furnace exhaust gas recovery device, comprising a furnace body, one side of the furnace body is fixedly connected with a conveying pipe, the other end of the conveying pipe is fixedly connected with a spiral pipe, the outside of the spiral pipe is fixedly connected with a pre-cooling box, the outside of the spiral pipe is fixedly connected with a plurality of buffer pads, the outside of the buffer pad is fixedly connected with a catalyst bed, one side of the pre-cooling box is fixedly connected with a water delivery assembly for conveying a water pipe, one end of the water delivery assembly is fixedly connected with an atomizing nozzle, one side of the inner wall of the pre-cooling box is fixedly connected with a top box, the inner wall of the top box is fixedly connected with a driving assembly for providing power, the outer side wall of the driving assembly is fixedly connected with a slide rod, the outer side of the slide rod is slidably connected with a slide frame, one end of the atomizing nozzle is fixedly connected to one side of the slide frame, one side of the pre-cooling box is fixedly connected with a combustion tank, the inner wall of the combustion tank is fixedly connected with a multi-point injection flame heating system, the other side of the combustion tank is fixedly connected with a heat exchanger.

[0008] Through the above technical scheme: first, the fire door or roller shutter door to be detected is placed in the inside of the furnace body, then a little clean water is added in the inside of the pre-cooling box, the water delivery assembly is started to provide water source to the inside of the atomizing nozzle, the driving assembly is started to drive the slide frame to slide left and right, water is uniformly sprayed on the surface of the spiral pipe and the catalyst bed, the exhaust gas transmitted in the spiral pipe is cooled and humidified, and the spiral pipe is in the shape of a screw thread, so that the exhaust gas rotates when passing through the spiral pipe, thereby uniformly adhering to the inner wall of the spiral pipe, and then passing through the catalyst bed filled with precious metal catalyst particles, which can effectively accelerate the oxidation reaction of harmful substances. Subsequently, the exhaust gas is transmitted to the inside of the combustion tank to utilize the multi-point injection flame heating system to ensure sufficient temperature to completely burn the exhaust gas, and finally transmitted to the inside of the heat exchanger for recycling.

[0009] As a further description of the above technical scheme:

[0010] The water delivery assembly comprises a water pump, the outer side of the water pump is fixedly connected to one side of the pre-cooling box, one end of the water pump is fixedly connected with a hose, one side of the inner wall of the pre-cooling box is fixedly connected with a water collecting plate, the other side of the water collecting plate is detachably connected with a filter screen, the output end of the water pump is fixedly connected with another hose, and one end of the atomizing nozzle is fixedly connected to one end of the other hose.

[0011] Through the above technical scheme: the water pump can pump clean water from the inner wall of the water collecting plate to the inside of the hose, and then transmit it to the inside of the atomizing nozzle to cool and humidify the exhaust gas in the spiral pipe; at the same time, the filter screen can filter excessive water, facilitating subsequent multiple cycles of cooling treatment.

[0012] As a further description of the above technical scheme:

[0013] The driving assembly comprises a motor one, the outer part of the motor one is fixedly connected to the inner wall of the top box, the driving end of the motor one is fixedly connected with a main shaft, the outer part of the main shaft is fixedly connected with a main pulley, the inner wall of the top box is rotatably connected with a driven pulley, the outer part of the main pulley and the driven pulley is sleeved with a belt, and the outer part of the slide rod is fixedly connected to the outer side wall of the belt.

[0014] Through the above technical scheme: the motor one here can drive the main shaft, the main pulley and the driven pulley to rotate after starting, further drive the belt transmission, thereby driving the slide rod to slide on the inner wall of the top box, at this time the slide rod will continue to drive the slide frame to slide on the outside of the top box, thereby driving the atomizing nozzle to move left and right in the inside of the pre-cooling box, realizing uniform spraying of the spiral pipeline.

[0015] As a further description of the above technical scheme:

[0016] The pre-cooling box is fixedly connected with a support on one side, the inner wall of the support is fixedly connected with a motor two, and the driving end of the motor two is fixedly connected with a rotating shaft.

[0017] Through the above technical scheme: the motor two here can drive the rotating shaft to rotate after starting.

[0018] As a further description of the above technical scheme:

[0019] The outer part of the rotating shaft is fixedly connected with a knocking hammer, and the outer part of the knocking hammer is in contact with one side of the catalyst bed.

[0020] Through the above technical scheme: the rotating shaft here can drive the oval-shaped knocking hammer to knock one of the catalyst beds when rotating, so that it and the spiral pipeline vibrate slightly, and the excessive water attached to the surfaces of them is vibrated to the surface of the filter screen for filtration, facilitating subsequent multiple recycling and saving cost.

[0021] As a further description of the above technical scheme:

[0022] One end of the conveying pipe is fixedly connected to the inner wall of the pre-cooling box, and one end of the catalyst bed is fixedly connected to the inner wall of the pre-cooling box.

[0023] Through the above technical scheme: the pre-cooling box here provides stable support for the conveying pipe and the catalyst bed.

[0024] As a further description of the above technical scheme:

[0025] The outer part of the hose is fixedly connected to the inner wall of the water collecting plate, and the outer part of the other hose is slidably connected to the inner wall of the pre-cooling box.

[0026] Through the technical scheme, the water pump can re-pump the filtered water collected by the water collecting plate into the interior of the atomizing nozzle.

[0027] Further description of the technical scheme is as follows:

[0028] One end of the slide rod is slidingly connected to the inner wall of the top box, and the inner wall of the slide frame is slidingly connected to the outside of the top box.

[0029] Through the technical scheme, the top box provides a stable sliding space for the slide rod and the slide frame.

[0030] The utility model has the advantages of:

[0031] 1. In the utility model, first, the water pump pumps the water in the water collecting plate into the interior of the atomizing nozzle to spray on the outside of the spiral pipeline, preliminarily cools and moistens the waste gas, and the waste gas rotates while advancing when passing through the spiral pipeline, so that the oxidation reaction of harmful substances is effectively accelerated under the action of the noble metal catalyst particles in the catalyst bed, then the waste gas is transmitted into the combustion tank to ensure sufficient temperature to promote complete combustion, finally, the heat exchanger is responsible for recycling the high-temperature flue gas after combustion, the above design can adapt to various different complex mixed gases, and the application range is high; in addition, the power of the motor one drives the main pulley and the driven pulley to rotate, thereby driving the belt transmission, at this time, the slide rod slides on the inner wall of the top box, and simultaneously drives the slide frame and the atomizing nozzle to slide left and right in the interior of the pre-cooling tank, so that uniform cooling of the spiral pipeline and moistening of the waste gas are achieved.

[0032] 2. In the utility model, the motor two is started to drive the rotating shaft and the oval-shaped beating hammer to rotate, thereby knocking the outside of one of the catalyst beds, and under the action of the buffer pad, the spiral pipeline can be slightly vibrated without being damaged, thereby vibrating the water droplets on the outside of the spiral pipeline and the catalyst bed to fall, and after being filtered by the filter screen, the water droplets are re-pumped into the interior of the atomizing nozzle for use, thereby saving cost. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A stereogram of a fire door and roller shutter door fire resistance test furnace waste gas recycling device is provided in the utility model;

[0034] Figure 2 A structure diagram of a slope block of a fire door and roller shutter door fire resistance test furnace waste gas recycling device is provided in the utility model;

[0035] Figure 3 A structure diagram of a hose of a fire door and roller shutter door fire resistance test furnace waste gas recycling device is provided in the utility model;

[0036] Figure 4 As Figure 3 An enlarged view of A in FIG. 1 is shown in FIG. 2.

[0037] Figure 5 A structural schematic view of a combustion tank of a waste gas recovery device of a fire resistance test furnace for a fireproof door and a roller shutter door is provided in the utility model.

[0038] Legend:

[0039] 1, furnace body; 2, conveying pipe; 3, spiral pipe; 4, pre-cooling tank; 5, buffer pad; 6, catalyst bed; 7, water pump; 8, hose; 9, water collecting plate; 10, filter screen; 11, atomizing nozzle; 12, top box; 13, motor one; 14, main shaft; 15, main pulley; 16, driven pulley; 17, belt; 18, sliding rod; 19, sliding frame; 20, support column; 21, motor two; 22, rotating shaft; 23, striking hammer; 24, combustion tank; 25, multi-point injection flame heating system; 26, heat exchanger. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0041] With reference to Figures 1 to 2 The utility model provides an embodiment: a kind of waste gas recovery device of fire resistance test furnace for fireproof door and roller shutter door, including furnace body 1, furnace body 1 here is the experimental furnace body of detecting fireproof door and roller shutter door, one side of furnace body 1 is fixedly connected with conveying pipe 2, conveying pipe 2 here is used to transmit the waste gas generated in testing process, the other end of conveying pipe 2 is fixedly connected with spiral pipe 3, waste gas will be transmitted to the inside of spiral pipe 3 along conveying pipe 2, the outside of spiral pipe 3 is fixedly connected with pre-cooling tank 4, pre-cooling tank 4 here can be cooled and humidified to waste gas in the inside of spiral pipe 3, one end of conveying pipe 2 is fixedly connected in the inner wall of pre-cooling tank 4, the outside of spiral pipe 3 is fixedly connected with multiple buffer pads 5, the outside of buffer pad 5 is fixedly connected with catalyst bed 6, the inside of catalyst bed 6 here is filled with precious metal catalyst particles, can effectively accelerate the oxidation reaction of harmful substance. One end of catalyst bed 6 is fixedly connected in the inner wall of pre-cooling tank 4;

[0042] Specifically, first, the fireproof door or roller shutter door to be tested can be placed in the interior of the furnace body 1, and then the test is carried out. The exhaust gas generated during the test is transmitted along the conveying pipe 2 to the spiral pipe 3 in the interior of the pre-cooling box 4. Since the spiral pipe 3 is spiral-shaped, the exhaust gas rotates in the interior when passing through, and then adheres to the inner wall of the spiral pipe 3. The interior of the catalyst bed 6 is filled with noble metal catalyst particles, which can effectively accelerate the oxidation reaction of harmful substances.

[0043] With reference to Figures 2 to 4 One side of the pre-cooling box 4 is fixedly connected with a water conveying assembly for conveying a water pipe. The water conveying assembly comprises a water pump 7. The water pump 7 is fixedly connected to one side of the pre-cooling box 4. The pre-cooling box 4 provides stable support for the water pump 7. One end of the water pump 7 is fixedly connected with a hose 8. The hose 8 is used to convey water sources. One side of the inner wall of the pre-cooling box 4 is fixedly connected with a water collecting plate 9. The outer side of the hose 8 is fixedly connected to the inner wall of the water collecting plate 9. The hose 8 can convey the clean water collected by the water collecting plate 9. The other side of the water collecting plate 9 is detachably connected with a filter screen 10. The filter screen 10 can filter the water sources and remove impurities. The output end of the water pump 7 is fixedly connected with another hose 8. The outer side of the other hose 8 is slidingly connected to the inner wall of the pre-cooling box 4. The water pump 7 can pump out the clean water and convey it along the hose 8.

[0044] One end of the water conveying assembly is fixedly connected with an atomizing nozzle 11. One end of the atomizing nozzle 11 is fixedly connected to one end of the other hose 8. The clean water is conveyed along the hose 8 to the atomizing nozzle 11 to cool and moisten the exhaust gas in the spiral pipe 3. One side of the inner wall of the pre-cooling box 4 is fixedly connected with a top box 12. The inner wall of the top box 12 is fixedly connected with a driving assembly for providing power. The driving assembly comprises a motor one 13. The outer side of the motor one 13 is fixedly connected to the inner wall of the top box 12. The top box 12 provides stable support for the motor one 13, so that the motor one 13 remains stable during operation. The driving end of the motor one 13 is fixedly connected with a main shaft 14. The main shaft 14 is driven to rotate after the motor one 13 is started. The outer side of the main shaft 14 is fixedly connected with a main pulley 15. The main shaft 14 drives the main pulley 15 to rotate when the main shaft 14 rotates. The inner wall of the top box 12 is rotatably connected with a driven pulley 16. The outer sides of the main pulley 15 and the driven pulley 16 are sleeved with a belt 17. The belt 17 is driven to start transmission with the assistance of the driven pulley 16 when the main pulley 15 rotates.

[0045] The outer side wall of the driving assembly is fixedly connected with a slide rod 18, the outer portion of the slide rod 18 is fixedly connected with the outer side wall of the belt 17, when the belt 17 is driven, the outer portion of the slide rod 18 can be driven to rotate along a circular rectangular track, one end of the slide rod 18 is slidably connected with the inner wall of the top box 12, the outer portion of the slide rod 18 is slidably connected with a slide frame 19, a long groove is formed in the middle of the slide frame 19, so that the slide rod 18 can drive the slide frame 19 to move left and right as a whole when rotating, the inner wall of the slide frame 19 is slidably connected with the outer portion of the top box 12, one end of the atomizing nozzle 11 is fixedly connected with one side of the slide frame 19, when the slide frame 19 moves left and right, the atomizing nozzle 11 can be driven to move synchronously, so that uniform spraying of clean water on the outer portion of the spiral pipe 3 is realized.

[0046] Specifically, first, a proper amount of clean water can be poured into the inside of the water collecting plate 9, then the water pump 7 is started to transmit the clean water from the hose 8 to the inside of the atomizing nozzle 11, at this time, the motor one 13 in the top box 12 is started to drive the main shaft 14, the main pulley 15 and the driven pulley 16 to rotate, further drive the belt 17 to drive, at this time, the slide rod 18 on one side of the belt 17 is driven to rotate synchronously, the track is a circular rectangular track. Because a long groove is formed in the middle of the slide frame 19, and the outer portion of the slide rod 18 is slidably connected with the inner wall of the groove, the slide frame 19 can be driven to slide left and right on the outer portion of the top box 12, further drive the atomizing nozzle 11 fixedly connected therewith to slide left and right, so that uniform spraying of clean water on the surface of the spiral pipe 3 is realized.

[0047] Referring to Figure 2 , Figure 3 and Figure 5 , one side of the pre-cooling box 4 is fixedly connected with a support column 20, the inner wall of the support column 20 is fixedly connected with a motor two 21, the support column 20 provides stable support for the motor two 21, the driving end of the motor two 21 is fixedly connected with a rotating shaft 22, the motor two 21 can drive the rotating shaft 22 to rotate after being started, the outer portion of the rotating shaft 22 is fixedly connected with a beating hammer 23, the outer portion of the beating hammer 23 is in contact with one side of the catalyst bed 6, when the rotating shaft 22 rotates, the beating hammer 23 can be driven to rotate, so that one of the catalyst beds 6 is beaten, the whole spiral pipe 3 and the plurality of catalyst beds 6 are driven to vibrate slightly under the action of the buffer pad 5, the excess water attached to the surface of the two is vibrated to the filter screen 10 for filtration, then falls into the bottom of the water collecting plate 9 and is pumped to the inside of the atomizing nozzle 11 by the water pump 7 for recycling.

[0048] The pre-cooling box 4 is fixedly connected with a combustion tank 24 on one side, and the inner wall of the combustion tank 24 is fixedly connected with a multi-point injection flame heating system 25. After the exhaust gas is subjected to the cooling and humidification treatment, the exhaust gas is transmitted to the inside of the combustion tank 24. Under the action of the multi-point injection flame heating system 25, the temperature is ensured to be sufficient to promote complete combustion. The other side of the combustion tank 24 is fixedly connected with a heat exchanger 26. The heat exchanger 26 is responsible for recycling the high-temperature flue gas after combustion.

[0049] Specifically, the motor two 21 can be started to drive the rotating shaft 22 and the elliptical beating hammer 23 to rotate, so that one of the catalyst bed layers 6 is beaten, and the spiral pipeline 3 and all the catalyst bed layers 6 are slightly vibrated under the protection of the buffer pad 5, so that the excess moisture attached to the surfaces of the spiral pipeline 3 and the catalyst bed layers 6 is vibrated to the surface of the filter screen 10 and then falls into the bottom of the water collecting plate 9. Then, the water pump 7 re-pumps the water to the inside of the atomizing nozzle 11 for spraying work, so that the water can be used multiple times, and the cost is reduced. The exhaust gas subjected to the cooling and humidification treatment in the spiral pipeline 3 is further transmitted to the inside of the combustion tank 24. Under the action of the multi-point injection flame heating system 25, the temperature is ensured to be sufficient to promote complete combustion of the exhaust gas. Finally, the heat exchanger 26 recycles the high-temperature flue gas after combustion.

[0050] Working principle: First, the fireproof door or roller shutter to be tested is placed in the furnace body 1 for experiment. The exhaust gas generated during the experiment is transmitted to the spiral pipeline 3 in the pre-cooling box 4 through the conveying pipe 2. Since the spiral pipeline 3 is designed in a spiral shape, the exhaust gas rotates in the inside when passing through, and adheres to the inner wall of the spiral pipeline 3. This design helps to increase the contact area between the exhaust gas and the catalyst bed layer 6 filled with precious metal catalyst particles, and accelerate the oxidation reaction of harmful substances.

[0051] Secondly, the motor one 13 is started to drive the main shaft 14, the main pulley 15 and the driven pulley 16 to rotate, and further drive the belt 17 to transmit. The slide rod 18 on one side of the belt 17 is synchronously transmitted, and the trajectory is a circular rectangular. A long groove is formed in the middle of the slide frame 19, and the outer part of the slide rod 18 slides on the inner wall of the groove. Therefore, when the slide rod 18 rotates, it drives the slide frame 19 to slide left and right outside the top box 12, thereby driving the atomizing nozzle 11 to move left and right. The design cooperates with the water pump 7 to pump the water at the bottom of the water collecting plate 9 to the inside of the atomizing nozzle 11, so as to achieve the purpose of uniformly spraying water on the surface of the spiral pipeline 3, and the exhaust gas in the inside can be subjected to cooling and humidification treatment. In this way, the temperature and humidity of the exhaust gas can be reduced, which is beneficial to the subsequent combustion treatment.

[0052] At the same time, the motor 21 is started to drive the rotating shaft 22 to rotate, and the oval-shaped hammer 23 rotates and hits one of the catalyst beds 6. The buffer pad 5 ensures that the spiral pipe 3 is not damaged and drives the spiral pipe 3 and all the catalyst beds 6 to vibrate slightly. In this way, the excess moisture attached to the surface of the two can be vibrated to the filter screen 10 for filtration, and then fall into the bottom of the water collecting plate 9. Then it is re-pumped by the water pump 7 to the inside of the atomizing nozzle 11 for spraying work, which is convenient for subsequent multiple use and reduces the cost.

[0053] Finally, the exhaust gas after the cooling and humidification treatment of the spiral pipe 3 is further transmitted to the inside of the combustion tank 24. The multi-point injection flame heating system 25 ensures sufficient temperature to promote complete combustion of the exhaust gas. The high-temperature flue gas after combustion is recycled through the heat exchanger 26.

[0054] Finally, it should be pointed out that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fire door and roller shutter door fire resistance test furnace exhaust recovery apparatus comprising a furnace body (1) characterised in that: One side of the furnace body (1) is fixedly connected with a conveying pipe (2), one end of the conveying pipe (2) is fixedly connected with a spiral pipe (3), the outside of the spiral pipe (3) is fixedly connected with a pre-cooling box (4), the outside of the spiral pipe (3) is fixedly connected with a plurality of buffer pads (5), the outside of the buffer pad (5) is fixedly connected with a catalyst bed (6), one side of the pre-cooling box (4) is fixedly connected with a water delivery assembly for conveying a water pipe, one end of the water delivery assembly is fixedly connected with an atomizing nozzle (11), one side of the inner wall of the pre-cooling box (4) is fixedly connected with a top box (12), the inner wall of the top box (12) is fixedly connected with a driving assembly for providing power, the outer side wall of the driving assembly is fixedly connected with a slide rod (18), the outside of the slide rod (18) is slidingly connected with a slide frame (19), one end of the atomizing nozzle (11) is fixedly connected to one side of the slide frame (19), one side of the pre-cooling box (4) is fixedly connected with a combustion tank (24), the inner wall of the combustion tank (24) is fixedly connected with a multi-point injection flame heating system (25), the other side of the combustion tank (24) is fixedly connected with a heat exchanger (26).

2. A fire door and roller shutter door fire resistance test furnace exhaust gas recovery apparatus according to claim 1, characterised in that: The water delivery assembly comprises a water pump (7), the outside of the water pump (7) is fixedly connected to one side of the pre-cooling box (4), one end of the water pump (7) is fixedly connected with a hose (8), one side of the inner wall of the pre-cooling box (4) is fixedly connected with a water collecting plate (9), the other side of the water collecting plate (9) is detachably connected with a filter screen (10), the output end of the water pump (7) is fixedly connected with another hose (8), one end of the atomizing nozzle (11) is fixedly connected to one end of the other hose (8).

3. A fire door and roller shutter door fire resistance test furnace exhaust gas recovery apparatus according to claim 1, characterised in that: The driving assembly comprises a motor one (13), the outside of the motor one (13) is fixedly connected to the inner wall of the top box (12), the driving end of the motor one (13) is fixedly connected with a main shaft (14), the outside of the main shaft (14) is fixedly connected with a main pulley (15), the inner wall of the top box (12) is rotatably connected with a driven pulley (16), the outside of the main pulley (15) and the driven pulley (16) is sleeved with a belt (17), the outside of the slide rod (18) is fixedly connected to the outer side wall of the belt (17).

4. A fire door and roller shutter door fire resistance test furnace exhaust gas recovery apparatus according to claim 1, characterised in that: One side of the pre-cooling box (4) is fixedly connected with a support column (20), the inner wall of the support column (20) is fixedly connected with a motor two (21), the driving end of the motor two (21) is fixedly connected with a rotating shaft (22).

5. A fire door and roller shutter door fire resistance test furnace exhaust gas recovery apparatus according to claim 4, characterised in that: The outside of the rotating shaft (22) is fixedly connected with a hammer (23), the outside of the hammer (23) is in contact with one side of the catalyst bed (6).

6. A fire door and roller shutter door fire resistance test furnace exhaust gas recovery apparatus according to claim 1, characterised in that: One end of the conveying pipe (2) is fixedly connected to the inner wall of the pre-cooling box (4), one end of the catalyst bed (6) is fixedly connected to the inner wall of the pre-cooling box (4).

7. A fire door and roller shutter door fire resistance test furnace exhaust gas recovery apparatus according to claim 2, characterised in that: The outside of the hose (8) is fixedly connected to the inner wall of the water collecting plate (9), the outside of the other hose (8) is slidingly connected to the inner wall of the pre-cooling box (4).

8. A fire door and roller shutter door fire resistance test furnace exhaust gas recovery apparatus according to claim 1, characterised in that: One end of the slide rod (18) is connected to the inner wall of the top box (12), and the inner wall of the slide frame (19) is connected to the outside of the top box (12).

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