A kind of high-temperature flue gas cooling explosion detection equipment for heating furnace after emergency shutdown

Abstract

The utility model discloses a kind of high-temperature flue gas cooling explosion detection equipment for heating furnace emergency shutdown, it is related to high-temperature flue gas explosion detection technical field, including spiral pipe and pump suction type detection component, the spiral pipe is fixedly arranged in cooling pipe inside, the spiral pipe input end is connected with installation box, the installation box other side is equipped with air inlet pipe, the installation box inside is equipped with filter mechanism, the spiral pipe output end is connected with conveying pipe, the conveying pipe output end is communicated with pump suction type detection component input end, the cooling pipe bottom end is equipped with cooling mechanism, the utility model is through setting cooling mechanism, and then can carry out first cooling to high-temperature flue gas, conveying pipe and baffle are arranged in cooling box inside, and then can carry out secondary cooling to high-temperature flue gas, by setting filter mechanism between air inlet pipe one end and spiral pipe one end, filter screen plate can filter and intercept the impurity in high-temperature flue gas.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature flue gas explosion detection technology, specifically a high-temperature flue gas cooling and explosion detection device used after an emergency shutdown of a heating furnace. Background Technology

[0002] In petrochemical production plants, the heating furnace is a common and critical piece of equipment. It typically uses combustible gases such as natural gas or desulfurized dry gas as fuel to heat the furnace tubes, bringing the material inside to the required process temperature. To ensure safe operation, the heating furnace is generally equipped with multiple interlocking protections, including those for fuel gas pressure, furnace temperature, emergency pressure relief, and the status of the feed pump and circulating hydrogen compressor. When operating parameters trigger interlocking conditions, the fuel gas shut-off valve immediately activates, achieving an emergency shutdown. After the interlocking conditions are released and resumption of production is confirmed, the heating furnace must be reignited. According to explosion-proof safety regulations, combustible gas samples must be taken and analyzed at three representative locations within the furnace (upper, middle, and lower) before ignition. The acceptable standard is a combustible gas concentration below 0.5%.

[0003] After an emergency shutdown of the heating furnace, the residual high-temperature flue gas inside the furnace is affected by the residual heat from the furnace's radiation, especially in the upper part of the radiant section where the temperature can approach 600℃, far exceeding the operating range of conventional gas detectors. Commonly available pump-suction four-in-one detectors typically require gas temperatures below 50-100℃ and cannot be directly used in high-temperature environments. Forcing sampling of high-temperature gas will lead to permanent damage to the sensor, such as accelerated oxidation of the catalytic combustion element due to high temperatures, vaporization of the electrolyte in the electrochemical sensor, or electrode aging. Simultaneously, high temperatures may cause thermal decomposition of the gas or distortion of the detection signal, severely affecting measurement accuracy. Traditional operations require waiting for the furnace to cool naturally to the instrument's suitable temperature, often taking several hours. This is especially problematic for large heating furnaces with good insulation and high heat capacity, resulting in slow cooling and significantly delaying the resumption of production, impacting production continuity.

[0004] Based on this, a device for cooling and detecting explosions of high-temperature flue gas after an emergency shutdown of a heating furnace is provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a device for measuring the explosion of high-temperature flue gas after an emergency shutdown of a heating furnace, in order to solve the problem of inconvenience in continuous measurement in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An explosion detection device for cooling high-temperature flue gas after an emergency shutdown of a heating furnace includes a spiral tube and a pump-suction detection component. The spiral tube is spirally arranged and fixed inside a cooling tube. An installation box is connected to the input end of the spiral tube. An air inlet pipe is installed on the other side of the installation box, coaxial with the input end of the spiral tube. A filter mechanism for filtering high-temperature flue gas is provided inside the installation box. A conveying pipe is connected to the output end of the spiral tube and installed inside the cooling box. The output end of the conveying pipe is connected to the input end of the pump-suction detection component. A cooling mechanism for preliminary cooling of the high-temperature flue gas is provided at the bottom end of the cooling tube.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative: a liquid inlet pipe is connected to one side of the bottom of the cooling box, and a liquid outlet pipe is connected to the top of the cooling box. The liquid inlet pipe is connected to the output end of the first external liquid supply component, and the liquid outlet pipe is connected to the input end of the external liquid recovery component. Several partitions are evenly spaced inside the cooling box, and adjacent partitions are staggered. The cooling pipe and the cooling box are both fixed to the upper part of the bottom plate.

[0010] In one alternative embodiment: the filtration mechanism includes a switching disc, which is rotatably mounted inside a mounting box. A rotating shaft on one side of the switching disc is fixedly connected to the output end of a first motor. The first motor is fixedly mounted on one side of the mounting box. The switching disc has several mounting holes spaced at equal intervals. Each mounting hole contains a filter element, which includes two filter screens arranged symmetrically. Each filter screen has a first sliding seat and a second sliding seat symmetrically arranged on one side. Guide grooves are provided in the mounting holes corresponding to the positions of the first and second sliding seats. A first return spring is provided between one end of the second sliding seat and one end of the guide groove. A top rod is fixedly provided on one side of each first sliding seat. The filter holes on one side of the two filter screens are staggered. A cleaning assembly for cleaning one side of the filter screens is provided on one side of the mounting box.

[0011] In one alternative embodiment: the cleaning assembly includes a cleaning tube; the mounting box has cleaning perforations on both sides and at one mounting hole; a first fixed tube and a second fixed tube are respectively fixed in the two cleaning perforations; a fixed tube is rotatably installed in the mounting hole in the middle of the first fixed tube; one end of the fixed tube is connected to the cleaning tube; the other end of the fixed tube is rotatably connected to a rotating joint; a driven gear is fixed on the fixed tube; a driving gear meshes with the driven gear; the driving gear is fixed at the output end of a second motor; the second motor is fixed on one side of the first fixed tube; a filter bag is installed at one end of the second fixed tube; a connecting box is fixed on one side of the mounting box corresponding to the position of the second fixed tube; guide rings are provided at the ends of the cleaning perforations; the input end of the rotating joint is connected to the output end of the air pump; and the air pump is fixed on the upper end of the base plate.

[0012] In one alternative embodiment: the cooling mechanism includes an exhaust box and an atomizing ring. The exhaust box is fixedly installed at the bottom of the cooling pipe. The input end of the exhaust box is connected to the output end of the air pump. Several exhaust holes are arrayed on the upper end of the exhaust box. Two atomizing rings are fitted on the upper end of the exhaust box. Both atomizing rings are fixedly installed inside the cooling pipe. The two atomizing rings are connected to each other through a first connecting pipe. A second connecting pipe is connected to one of the atomizing rings. The other end of the second connecting pipe is connected to the output end of the liquid pump. The liquid pump is fixedly installed on the upper end of the base plate.

[0013] In one alternative: the spiral tube is tapered from top to bottom.

[0014] In one alternative: one end of the intake pipe is connected to a first connecting pipe, a first piston plate is slidably disposed inside the first connecting pipe, a first guide rod is fixedly disposed at the upper end of the first piston plate, the first guide rod is slidably disposed in a first fixing hole at the end of the first connecting pipe, and a second return spring is disposed between the upper end of the first piston plate and the inner end of the first connecting pipe.

[0015] In one alternative: one end of the spiral tube is connected to a second connecting tube, a second piston plate is slidably disposed inside the second connecting tube, a second guide slide rod is fixedly disposed at the bottom end of the second piston plate, the second guide slide rod is slidably disposed in a second fixing hole at the bottom end of the second connecting tube, and a third return spring is disposed between one end of the first guide slide rod and the bottom end of the second connecting tube.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model can initially cool high-temperature flue gas by setting the spiral tube in a conical spiral shape and setting a cooling mechanism at the bottom of the cooling tube. Furthermore, by setting a conveying pipe and a baffle inside the cooling box and keeping the coolant in a flowing state inside the cooling box, the high-temperature flue gas can be cooled again. Through the two cooling processes of the high-temperature flue gas, damage to the pump-suction detection component can be prevented.

[0018] 2. This utility model provides a filter mechanism between one end of the air inlet pipe and one end of the spiral pipe, so that the filter screen can filter and intercept impurities in the high-temperature flue gas before it enters the spiral pipe. This prevents impurities from entering the spiral pipe and the conveying pipe and affecting the cooling effect on the high-temperature flue gas, thereby increasing the practicality of the high-temperature flue gas cooling and explosion detection device after the emergency shutdown of the heating furnace. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the spiral tube structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the partition installation of this utility model.

[0022] Figure 4 This is a schematic diagram of the internal structure of the first connecting pipe and the second connecting pipe of this utility model.

[0023] Figure 5 This is a schematic diagram of the switching disk structure of this utility model.

[0024] Figure 6 This is a schematic diagram of the filter screen structure of this utility model.

[0025] Figure 7 This is a schematic diagram of the installation of the cleaning pipe of this utility model.

[0026] Figure 8 This is a schematic diagram of the top rod structure of this utility model.

[0027] Figure 9 This is a schematic diagram of the exhaust box and atomizing ring structure of this utility model.

[0028] Figure reference numerals: 11 Inlet pipe, 12 Mounting box, 13 Switching plate, 14 Filter screen, 15 First sliding seat, 16 Top rod, 17 Second sliding seat, 18 First return spring, 19 First motor, 20 First fixed pipe, 21 Second fixed pipe, 22 Connecting box, 23 Cleaning pipe, 24 Driven gear, 25 Second motor, 26 Guide ring, 27 First connecting pipe, 28 First piston plate, 29 Second return spring, 30 Second connecting pipe, 31 Second piston plate, 32 Third return spring, 33 Spiral tube, 34 Cooling pipe, 35 Base plate, 36 Exhaust box, 37 Air pump, 38 Atomizing ring, 39 Liquid pump, 40 Delivery pipe, 41 Cooling box, 42 Partition, 43 Liquid inlet pipe, 44 Liquid outlet pipe, 45 Pump-type detection component. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] In one embodiment, such as Figures 1-9 As shown, a device for cooling and detecting high-temperature flue gas after an emergency shutdown of a heating furnace includes a spiral tube 33 and a pump-suction detection component 45. The spiral tube 33 is spirally arranged and fixed inside a cooling tube 34. An installation box 12 is connected to the input end of the spiral tube 33. An air inlet pipe 11 is installed on the other side of the installation box 12, coaxial with the input end of the spiral tube 33. A filter mechanism for filtering high-temperature flue gas is provided inside the installation box 12. A conveying pipe 40 is connected to the output end of the spiral tube 33. The conveying pipe 40 is installed inside a cooling box 41. The output end of the conveying pipe 40 is connected to the input end of the pump-suction detection component 45. A cooling mechanism for preliminary cooling of high-temperature flue gas is provided at the bottom end of the cooling tube 34. The filter mechanism facilitates the filtration of impurities in the high-temperature flue gas, thereby preventing impurities from adhering to the inner walls of the spiral tube 33 and the conveying pipe 40. The cooling mechanism facilitates preliminary cooling of the high-temperature flue gas.

[0032] The cooling tank 41 has an inlet pipe 43 connected to one side of its bottom end and an outlet pipe 44 connected to its upper end. The inlet pipe 43 is connected to the output end of the first external liquid supply component, and the outlet pipe 44 is connected to the input end of the external liquid recovery component. The cooling tank 41 has several partitions 42 evenly spaced inside, with adjacent partitions 42 arranged in an alternating pattern. The cooling pipe 34 and the cooling tank 41 are both fixed to the upper end of the base plate 35. In use, when high-temperature flue gas enters the conveying pipe 40, the output end of the first external liquid supply component supplies coolant to the cooling tank 41. Because the cooling tank 41 has several partitions 42 inside, The liquid flows along a curved channel formed by several baffles 42, thereby cooling the high-temperature flue gas inside the delivery pipe 40. At the same time, the used coolant is discharged through the outlet pipe 44, thus ensuring that the coolant inside the cooling tank 41 is always in a flowing state. The cooled coolant enters the input end of the pump-suction detection component 45, so that the pump-suction detection component 45 can detect the flue gas. It is worth noting that the pump-suction detection component 45 in the accompanying drawings of this application is shown at an enlarged scale compared with the other components, only for the purpose of easy viewing and understanding. The actual size of the pump-suction detection component 45 is several times smaller than the actual size of the delivery pipe 40.

[0033] The filtration mechanism includes a switching disk 13, which is rotatably mounted inside the mounting box 12. One side of the switching disk 13 has a rotating shaft fixedly connected to the output end of a first motor 19, which is fixedly mounted on one side of the mounting box 12. The switching disk 13 has several mounting holes spaced at equal intervals, each containing a filter element. Each filter element includes two filter screens 14 arranged symmetrically. Each filter screen 14 has a first sliding seat 15 and a second sliding seat 17 symmetrically arranged on one side. Guide grooves are provided in the mounting holes corresponding to the positions of the first and second sliding seats 15 and 17. A first return spring 18 is provided between one end of the second sliding seat 17 and one end of the guide groove. A top rod 16 is fixedly mounted on one side of each of the first sliding seats 15. The filter holes on one side of the two filter screens 14 are staggered. A cleaning assembly for cleaning one side of the filter screens 14 is provided on one side of the mounting box 12.

[0034] The cleaning assembly includes a cleaning tube 23. The mounting box 12 has cleaning perforations on both sides and at one mounting hole. A first fixing tube 20 and a second fixing tube 21 are respectively fixed in the two cleaning perforations. A fixing tube is rotatably mounted in the mounting hole in the middle of the first fixing tube 20. One end of the fixing tube is connected to the cleaning tube 23, and the other end of the fixing tube is rotatably connected to a rotating joint. A driven gear 24 is fixed on the fixing tube, and a driving gear meshes with the driven gear 24. The driving gear is fixed at the output end of the second motor 25. The second motor 25 is fixedly mounted on one side of the first fixed pipe 20. A filter bag is installed at one end of the second fixed pipe 21. A connecting box 22 is fixedly mounted on one side of the mounting box 12 at a position corresponding to the second fixed pipe 21. Guide rings 26 are provided at the ends of the cleaning perforations. The input end of the rotary joint is connected to the output end of the air pump 37. The air pump 37 is fixedly mounted on the upper end of the base plate 35. In use, when it is necessary to detect high-temperature flue gas, the end of the air inlet pipe 11 is connected to the outlet end of the heating furnace. The pump-suction detection component 45 generates suction to draw the high-temperature flue gas into the spiral. Inside pipe 33, when high-temperature flue gas flows, the flue gas first enters the installation box 12 and is filtered by the filter element. The filtered flue gas then enters the spiral tube 33. After the filter element has been working for a period of time, the output end of the first motor 19 drives the switching disk 13 to rotate, thereby replacing the filter element between one end of the inlet pipe 11 and one end of the spiral tube 33. The replaced filter element rotates between the first fixed pipe 20 and the second fixed pipe 21. At the same time, under the action of the first return spring 18, the two filter screens 14 separate, and then the air pump 37 delivers... High-pressure gas is delivered into the fixed tube from the outlet end. At the same time, the output end of the second motor 25 drives the drive gear to rotate. The drive gear meshes with the driven gear 24 to drive the cleaning tube 23 to rotate. The high-pressure gas is discharged through several exhaust heads on one side of the cleaning tube 23, which in turn backflush the two filter screens 14. Meanwhile, the impurities cleaned out enter the filter bag at the end of the second fixed tube 21. It is worth noting that the filter bag is not shown in the figure. At the same time, when the switching disc 13 rotates to switch, the guide ring 26 guides the top rod 16 so that the two filter screens 14 are tightly attached to one side.

[0035] The cooling mechanism includes an exhaust box 36 and an atomizing ring 38. The exhaust box 36 is fixedly installed at the bottom end of the cooling pipe 34. The input end of the exhaust box 36 is connected to the output end of the air pump 37. Several exhaust holes are arrayed on the upper end of the exhaust box 36. Two atomizing rings 38 are fitted on the upper end of the exhaust box 36. Both atomizing rings 38 are fixed inside the cooling pipe 34 and are connected to each other through a first connecting pipe. A second connecting pipe is connected to one of the atomizing rings 38, and the other end of the second connecting pipe is connected to the liquid pump 39. The outlet is connected, and the liquid pump 39 is fixedly installed on the upper end of the base plate 35. When it is needed to initially cool the high-temperature flue gas inside the spiral tube 33, the air pump 37 and the liquid pump 39 are started. The output end of the air pump 37 delivers high-pressure gas into the exhaust box 36. The exhaust box 36 discharges the gas and it flows along the inside of the cooling pipe 34. At the same time, the liquid pump 39 delivers the cooling liquid to the inside of the two atomizing rings 38. Several atomizing nozzles on the atomizing rings 38 atomize and spray the cooling liquid. The gas drives the atomized liquid to flow, thereby cooling the high-temperature flue gas inside the spiral tube 33.

[0036] The spiral tube 33 is tapered from top to bottom, which increases the contact area between the gas and the spiral tube 33 during use, thereby increasing the cooling effect on high-temperature gas.

[0037] Example 2

[0038] The difference from Embodiment 1 is that: one end of the air inlet pipe 11 is connected to a first connecting pipe 27, a first piston plate 28 is slidably disposed inside the first connecting pipe 27, a first guide slide rod is fixedly disposed at the upper end of the first piston plate 28, the first guide slide rod is slidably disposed in the first fixing hole at the end of the first connecting pipe 27, and a second return spring 29 is disposed between the upper end of the first piston plate 28 and the inner end of the first connecting pipe 27. In use, when the switching disk 13 is switching, the switching disk 13 will close the space between the air inlet pipe 11 and the spiral pipe 33 for a short period of time. When the gas outlet of the heating furnace is affected by high temperature, the gas expands under high temperature when the end of the air inlet pipe 11 is closed, and the first piston plate 28 will slide inside the first connecting pipe 27, thereby adjusting the gas pressure inside the air inlet pipe 11.

[0039] One end of the spiral tube 33 is connected to a second connecting tube 30. A second piston plate 31 is slidably disposed inside the second connecting tube 30. A second guide rod is fixedly disposed at the bottom end of the second piston plate 31. The second guide rod is slidably disposed in the second fixing hole at the bottom end of the second connecting tube 30. A third return spring 32 is disposed between one end of the first guide rod and the bottom end of the second connecting tube 30. In use, when the switching disc 13 closes one end of the spiral tube 33, a negative pressure is generated at the end of the spiral tube 33 under the influence of the pump-type detection component 45, causing the second piston plate 31 to slide inside the second connecting tube 30. Subsequently, when one end of the air inlet pipe 11 is reconnected to one end of the spiral tube 33, the second piston plate 31 returns to its initial position under the action of the third return spring 32.

[0040] The above embodiment discloses a device for cooling and detecting high-temperature flue gas after an emergency shutdown of a heating furnace. When it is necessary to detect high-temperature flue gas, the end of the inlet pipe 11 is connected to the outlet of the heating furnace. The pump-type detection component 45 generates suction to draw the high-temperature flue gas into the spiral tube 33. When the high-temperature flue gas flows, it first enters the installation box 12 and is filtered by the filter. The filtered flue gas then enters the spiral tube 33. The air pump 37 and the liquid pump 39 are started. The output end of the air pump 37 delivers high-pressure gas into the exhaust box 36. The exhaust box 36 discharges the gas and it flows along the cooling pipe 34. At the same time, the liquid pump 39 delivers cooling liquid to the two atomizing rings 38. Several atomizing nozzles on the atomizing rings 38 atomize and spray the cooling liquid. The gas drives the atomized liquid to flow, thereby cooling the high-temperature flue gas inside the spiral tube 33.

[0041] When the high-temperature flue gas enters the conveying pipe 40, the output end of the first external liquid supply component delivers coolant to the cooling box 41. Since the cooling box 41 is equipped with several baffles 42, the liquid flows along the curved channel formed by the combination of several baffles 42, thereby cooling the high-temperature flue gas inside the conveying pipe 40. At the same time, the used coolant is discharged through the liquid outlet pipe 44, thereby ensuring that the coolant inside the cooling box 41 is always in a flowing state. The cooled coolant enters the input end of the pump suction detection component 45, so that the pump suction detection component 45 can detect the flue gas.

[0042] After the filter element has been working for a period of time, the output end of the first motor 19 drives the switching disk 13 to rotate, thereby replacing the filter element between one end of the air inlet pipe 11 and one end of the spiral tube 33. The replaced filter element rotates between the first fixed tube 20 and the second fixed tube 21. At the same time, under the action of the first return spring 18, the two filter screens 14 are separated. Then, the output end of the air pump 37 delivers high-pressure gas into the fixed tube. At the same time, the output end of the second motor 25 drives the drive gear to rotate. The drive gear meshes with the driven gear 24 to drive the cleaning tube 23 to rotate. The high-pressure gas is discharged through several exhaust heads on one side of the cleaning tube 23, thereby backflushing the two filter screens 14. At the same time, the impurities cleaned out enter the filter bag at the end of the second fixed tube 21.

[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for detecting explosions in high-temperature flue gas after an emergency shutdown of a heating furnace, comprising a spiral tube (33) and a pump-suction detection component (45), wherein the spiral tube (33) is spirally arranged and fixedly disposed inside a cooling pipe (34), characterized in that, The spiral tube (33) is connected to an installation box (12) at its input end. An air inlet pipe (11) is installed on the other side of the installation box (12) at a location coaxial with the input end of the spiral tube (33). The installation box (12) is equipped with a filter mechanism for filtering high-temperature flue gas. The spiral tube (33) is connected to a conveying pipe (40) at its output end. The conveying pipe (40) is installed inside a cooling box (41). The output end of the conveying pipe (40) is connected to the input end of a pump-type detection component (45). The cooling pipe (34) is equipped with a cooling mechanism at its bottom end for initially cooling the high-temperature flue gas.

2. The explosion detection device for high-temperature flue gas cooling after emergency shutdown of a heating furnace according to claim 1, characterized in that, The cooling tank (41) has an inlet pipe (43) connected to one side of its bottom end, and an outlet pipe (44) connected to the top end of its upper end. The inlet pipe (43) is connected to the output end of the first external liquid supply component, and the outlet pipe (44) is connected to the input end of the external liquid recovery component. The cooling tank (41) has several partitions (42) evenly spaced inside, and adjacent partitions (42) are staggered. The cooling pipe (34) and the cooling tank (41) are both fixed on the upper end of the base plate (35).

3. The explosion detection device for high-temperature flue gas cooling after emergency shutdown of a heating furnace according to claim 2, characterized in that, The filtration mechanism includes a switching disc (13), which is rotatably mounted inside the mounting box (12). A rotating shaft on one side of the switching disc (13) is fixedly connected to the output end of a first motor (19), which is fixedly mounted on one side of the mounting box (12). The switching disc (13) has several mounting holes spaced at equal intervals, each containing a filter element. Each filter element includes two filter screens (14) arranged symmetrically on one side. The device is provided with a first sliding seat (15) and a second sliding seat (17). Guide grooves are provided in the mounting holes at positions corresponding to the positions of the first sliding seat (15) and the second sliding seat (17). A first return spring (18) is provided between one end of the second sliding seat (17) and one end of the guide groove. A top rod (16) is fixedly provided on one side of the first sliding seat (15). The filter holes on one side of the two filter screens (14) are staggered. A cleaning component for cleaning one side of the filter screens (14) is provided on one side of the mounting box (12).

4. The explosion detection device for high-temperature flue gas cooling after emergency shutdown of a heating furnace according to claim 3, characterized in that, The cleaning assembly includes a cleaning tube (23). The mounting box (12) has cleaning perforations on both sides and at one mounting hole. A first fixed tube (20) and a second fixed tube (21) are fixedly installed in the two cleaning perforations respectively. A fixed tube is rotatably installed in the mounting hole in the middle of the first fixed tube (20). One end of the fixed tube is connected to the cleaning tube (23). The other end of the fixed tube is rotatably provided with a rotating joint. A driven gear (24) is fixedly installed on the fixed tube. A driving gear is meshed on the driven gear (24). The driving gear is fixedly installed at the output end of the second motor (25). The second motor (25) is fixedly installed on one side of the first fixed tube (20). A filter bag is installed at one end of the second fixed tube (21). A connecting box (22) is fixedly installed on one side of the mounting box (12) at the position corresponding to the second fixed tube (21). A guide ring (26) is provided at the end of each cleaning perforation. The input end of the rotating joint is connected to the output end of the air pump (37). The air pump (37) is fixedly installed on the upper end of the base plate (35).

5. The explosion detection device for high-temperature flue gas cooling after emergency shutdown of a heating furnace according to claim 4, characterized in that, The cooling mechanism includes an exhaust box (36) and an atomizing ring (38). The exhaust box (36) is fixedly provided at the bottom end of the cooling pipe (34). The input end of the exhaust box (36) is connected to the output end of the air pump (37). The upper end of the exhaust box (36) is provided with a number of exhaust holes. The upper end of the exhaust box (36) is provided with two atomizing rings (38). The two atomizing rings (38) are fixedly provided inside the cooling pipe (34). The two atomizing rings (38) are connected to each other through a first connecting pipe. A second connecting pipe is provided on one of the atomizing rings (38). The other end of the second connecting pipe is connected to the output end of the liquid pump (39). The liquid pump (39) is fixedly provided on the upper end of the base plate (35).

6. The explosion detection device for high-temperature flue gas cooling after emergency shutdown of a heating furnace according to claim 1, characterized in that, The spiral tube (33) is tapered from top to bottom.

7. The explosion detection device for high-temperature flue gas cooling after emergency shutdown of a heating furnace according to claim 5, characterized in that, One end of the air intake pipe (11) is connected to a first connecting pipe (27). A first piston plate (28) is slidably provided inside the first connecting pipe (27). A first guide slide rod is fixedly provided at the upper end of the first piston plate (28). The first guide slide rod is slidably provided in the first fixing hole at the end of the first connecting pipe (27). A second return spring (29) is provided between the upper end of the first piston plate (28) and one end inside the first connecting pipe (27).

8. The explosion detection device for high-temperature flue gas cooling after emergency shutdown of a heating furnace according to claim 7, characterized in that, One end of the spiral tube (33) is connected to a second connecting tube (30). A second piston plate (31) is slidably provided inside the second connecting tube (30). A second guide slide rod is fixedly provided at the bottom end of the second piston plate (31). The second guide slide rod is slidably provided in the second fixing hole at the bottom end of the second connecting tube (30). A third reset spring (32) is provided between one end of the first guide slide rod and the bottom end of the second connecting tube (30).

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