Industrial furnace flue gas denitrification and heat recovery device

Abstract

The present invention discloses an industrial furnace flue gas denitrification and heat recovery device, which relates to the field of flue gas treatment technology and includes a denitrification reactor, an air preheater, a multi-stage catalyst, a soot blowing mechanism, an ammonia generator, a reflux pipe, and a switching plate. The present invention provides a reflux pipe and a switching plate, and monitors the emission content of nitrogen oxides at the smoke outlet of the denitrification reactor through a nitrogen oxide sensor, so that the switching plate can control the connection between the reflux pipe and the smoke outlet of the denitrification reactor according to the emission content of nitrogen oxides, so as to control the emission content of nitrogen oxides in the flue gas and improve the emission standard. The present invention provides a multi-stage catalyst and provides a soot blowing mechanism above the multi-stage catalyst to perform steam soot blowing treatment on the multi-stage catalyst, so as to reduce the problem of ash accumulation in the flue gas blocking the catalyst passage, thereby affecting the catalytic efficiency, and improve the catalytic efficiency of the catalyst.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, in particular to an industrial furnace flue gas denitrification and heat recovery device. Background Art

[0002] The flue gas produced by industrial furnace combustion contains large amounts of nitrogen oxides, necessitating denitrification. After the flue gas is evenly mixed with ammonia, a reducing agent, it passes through a catalytic reactor filled with a catalyst. This reaction causes the nitrogen oxides in the flue gas to react with ammonia, producing ammonia and water, thereby controlling the nitrogen oxide content in the flue gas below emission limits. Designing and constructing a denitrification reactor that meets emission standards is a fundamental requirement for industrial enterprises in environmental protection engineering design and construction.

[0003] As an environmental protection project to reduce nitrogen oxide emissions, the denitrification treatment project needs to consider multiple factors during its design and construction. It needs to consider the nitrogen oxide emission content and the emission temperature. A heat recovery device is used to recycle the residual heat in the flue gas to improve the heat utilization efficiency. At present, the denitrification reactor used for industrial furnace flue gas denitrification is mostly a single-channel structure. Since the denitrification reactor is affected by factors such as catalysis and incomplete combustion of the industrial furnace during use, its nitrogen oxide emission content will be high. Therefore, this application proposes an industrial furnace flue gas denitrification and heat recovery device with flue gas reflux. Summary of the Invention

[0004] The present invention provides an industrial furnace flue gas denitrification and heat recovery device, aiming to solve the above-mentioned problems.

[0005] To achieve the above-mentioned object, the present invention provides an industrial furnace flue gas denitrification and heat recovery device, comprising:

[0006] A denitration reactor, the smoke inlet of which is connected to the smoke exhaust port of the low-nitrogen burner;

[0007] An air preheater, one end of which is connected to the smoke outlet of the denitration reactor, and the other end of which is connected to the air inlet of the low-nitrogen burner, so that the waste heat of the flue gas passing through the denitration reactor passes through the air preheater to preheat the air entering the low-nitrogen burner;

[0008] Multi-stage catalyst, located in the denitrification reactor;

[0009] An ammonia generator is installed at the smoke inlet of the denitrification reactor;

[0010] A soot blowing mechanism is provided in the denitration reactor and located above the multi-stage catalyst;

[0011] A reflux pipe is connected to the smoke outlet and smoke inlet of the denitrification reactor;

[0012] The switching plate is rotatably arranged at the return duct so that the smoke outlet is switched to be connected to the return duct and the air preheater respectively.

[0013] As one embodiment of the present invention, a nitrogen oxide sensor for monitoring the emission content of nitrogen oxides is provided in the smoke outlet, and a switching plate is opened and closed by an electric push rod or a pneumatic push rod and is arranged in the return duct. The nitrogen oxide sensor and the electric push rod or the pneumatic push rod are electrically connected to the controller.

[0014] The ammonia generator is provided with a plurality of nozzles, and a plurality of nozzles are provided on the nozzles; the ammonia generator is also connected with the pipeline of the air inlet through a pipeline.

[0015] As one embodiment of the present invention, the multi-stage catalyst includes a first-stage catalyst, a second-stage catalyst and a third-stage catalyst; the sootblowing mechanism includes a first sootblowing mechanism, a second sootblowing mechanism and a third sootblowing mechanism, and the first sootblowing mechanism, the second sootblowing mechanism and the third sootblowing mechanism are respectively arranged above the first-stage catalyst, the second-stage catalyst and the third-stage catalyst.

[0016] The first sootblowing mechanism, the second sootblowing mechanism and the third sootblowing mechanism each include a first jet device, a second jet device and a third jet device, which are arranged in a row above the multi-stage catalyst.

[0017] As one embodiment of the present invention, the first jet device, the second jet device and the third jet device all include a telescopic rod, a main nozzle, an auxiliary nozzle and a plurality of nozzles arranged on the auxiliary nozzle. The telescopic rod is installed on the outer wall of the denitrification reactor; the main nozzle is connected to the output end of the telescopic rod and is located in the denitrification reactor, and the auxiliary nozzles are evenly distributed along the axial direction and connected to both sides of the main nozzle.

[0018] The first-stage catalytic converter, the second-stage catalytic converter and the third-stage catalytic converter are mounted in the denitrification reactor through a sliding frame, and screw lifting mechanisms are threadedly connected to both sides of the sliding frame; the ends of the second soot blowing mechanism and the third soot blowing mechanism are engaged with the sliding frame through a flipping mechanism, so that the second soot blowing mechanism and the third soot blowing mechanism are flipped and mounted in the denitrification reactor.

[0019] As one embodiment of the present invention, the flipping mechanism includes a sliding sleeve, a polygonal rod, a turntable and a rotating gear. The sliding sleeve is fixedly connected to the end of the main nozzle. The polygonal rod is rotatably arranged on the inner wall of the denitrification reactor through a bearing. The sliding sleeve is slidably sleeved on the polygonal rod. The turntable and the rotating gear are arranged at one end of the polygonal rod. A plurality of push rods are provided at one end of the sliding frame. The first rack and the second rack are spaced apart on the push rods. The sliding frame engages the first rack and the second rack with the rotating gear respectively through lifting and lowering movements.

[0020] A fixed groove is axially provided on one side of the push rod, and a first entry groove and a second entry groove are also provided on the push rod, and the first entry groove and the second entry groove are connected to the fixed groove; a first protrusion and a second protrusion are provided on the turntable, and the turntable is rotated to make the first protrusion pass through the first entry groove and enter the fixed groove, and the second protrusion pass through the second entry groove and enter the fixed groove.

[0021] As one embodiment of the present invention, the first rack and the second rack meshed on both sides of the second sootblowing mechanism are arranged horizontally opposite to each other, and the first rack and the second rack meshed on both sides of the third sootblowing mechanism are arranged horizontally opposite to each other.

[0022] Compared with the existing technology, it has the following beneficial effects:

[0023] 1. To improve emission standards, the present invention sets a return pipe and a switching plate, and uses a nitrogen oxide sensor to monitor the emission content of nitrogen oxides at the smoke outlet of the denitrification reactor. The switching plate can control the connection between the return pipe and the smoke outlet of the denitrification reactor according to the emission content of nitrogen oxides, so as to control the emission content of nitrogen oxides in the flue gas.

[0024] 2. To improve the catalytic efficiency of the catalyst, the present invention provides a multi-stage catalyst and a soot blowing mechanism above the multi-stage catalyst to perform steam soot blowing on the multi-stage catalyst, thereby reducing the problem of ash accumulation in the flue gas blocking the catalyst passage, thereby affecting the catalytic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of an industrial furnace flue gas denitrification and heat recovery device for this application;

[0027] Figure 2 This is an external schematic diagram of the denitrification reactor of this application;

[0028] Figure 3 This is a schematic diagram of the interior of the denitrification reactor of this application;

[0029] Figure 4 for Figure 3 A in the middle is an enlarged schematic diagram;

[0030] Figure 5 This is a schematic diagram of the interior of the denitrification reactor of this application;

[0031] Figure 6 for Figure 5The enlarged schematic diagram of point B in the middle;

[0032] Figure 7 A schematic diagram of the sliding frame for this application;

[0033] Figure 8 for Figure 7 Enlarged schematic diagram at point C in the middle;

[0034] Figure 9 for Figure 7 The enlarged schematic diagram of point D in the middle;

[0035] Figure 10 This is a side view of the interior of the denitrification reactor of this application;

[0036] Figure 11 for Figure 10 Enlarged schematic diagram at point E in the middle.

[0037] Reference numerals: 1-denitrification reactor; 11-smoke inlet; 12-smoke outlet; 2-air preheater; 3-multi-stage catalyst; 31-first stage catalyst; 33-second stage catalyst; 33-third stage catalyst; 4-ammonia generator; 5-soot blowing mechanism; 51-first soot blowing mechanism; 52-second soot blowing mechanism; 53-third soot blowing mechanism; 501-first injection device; 502-second injection device; 503-third injection device; 5011-telescopic rod; 5012-main nozzle; 50 13-auxiliary nozzle; 5014-nozzle; 5015-mounting frame; 5016-steam pipe joint; 6-return pipe; 7-switching plate; 8-screw lifting mechanism; 9-flipping mechanism; 91-sliding sleeve; 92-polygonal rod; 93-turntable; 94-rotating gear; 95-first protrusion; 96-second protrusion; 10-sliding frame; 101-push rod; 102-first rack; 103-second rack; 104-fixing slot; 105-first entry slot; 106-second entry slot. DETAILED DESCRIPTION

[0038] In order to make it easier to understand the structure of the present invention and the functional features and advantages that can be achieved, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0039] Example 1:

[0040] like Figures 1 to 4 As shown, the present invention provides an industrial furnace flue gas denitrification and heat recovery device, comprising:

[0041] The denitration reactor 1 has a smoke inlet 11 connected to the smoke exhaust port of the low-nitrogen burner;

[0042] The air preheater 2 has one end connected to the smoke outlet 12 of the denitration reactor 1 and the other end connected to the air inlet of the low-nitrogen burner, so that the waste heat of the flue gas passing through the denitration reactor 1 passes through the air preheater 2 to preheat the air entering the low-nitrogen burner;

[0043] The multi-stage catalyst 3 is arranged in the denitration reactor 1;

[0044] an ammonia generator 4, provided at the smoke inlet 11 of the denitration reactor 1;

[0045] A soot blowing mechanism 5 is provided in the denitration reactor 1 and is located above the multi-stage catalyst 3;

[0046] The reflux pipe 6 is connected to the smoke outlet 12 and the smoke inlet 11 of the denitration reactor 1;

[0047] The switching plate 7 is rotatably arranged at the return duct 6 so that the smoke outlet 12 is switched to communicate with the return duct 6 and the air preheater 2 respectively.

[0048] It also includes a rectifier, which is arranged in the denitration reactor 1 and located above the multi-stage catalyst 3.

[0049] Furthermore, a one-way exhaust fan may be provided in the reflux pipe 6 , and when the switch plate 7 is opened to connect the loop pipe with the smoke outlet 12 of the denitration reactor 1 , the exhaust fan will start to operate.

[0050] In the present invention, a nitrogen oxide sensor for monitoring nitrogen oxide emissions is installed within the smoke outlet 12. A switch plate 7 is located within the return duct 6 and is opened and closed by an electric or pneumatic push rod. Both the nitrogen oxide sensor and the electric or pneumatic push rod are electrically connected to a controller. The nitrogen oxide sensor monitors the nitrogen oxide emissions at the smoke outlet 12 of the denitrification reactor 1, and the monitoring results are transmitted to the controller in real time, allowing the controller to control the opening and closing of the switch plate 7 at any time, so that flue gas that does not meet emission standards can pass through the return duct 6 and then enter the denitrification reactor 1 for catalytic reaction.

[0051] See also Figure 1 The ammonia generator 4 of the present invention is provided with multiple nozzles, each of which is provided with multiple nozzles. The ammonia generator 4 is also connected to the air inlet pipe through a pipeline, so that air and ammonia can be mixed and enter the denitrification reactor 1. A valve is provided on the pipeline to control the air flow and close the pipeline.

[0052] See also Figure 3The multi-stage catalyst 3 of the present invention includes a primary catalyst 31, a secondary catalyst 32, and a tertiary catalyst 33. The sootblowing mechanism 5 includes a first sootblowing mechanism 51, a second sootblowing mechanism 52, and a third sootblowing mechanism 53. The first sootblowing mechanism 51, the second sootblowing mechanism 52, and the third sootblowing mechanism 53 are respectively disposed above the primary catalyst 31, the secondary catalyst 32, and the tertiary catalyst 33. By providing the multi-stage catalyst 3, multi-stage catalytic treatment of the flue gas is achieved.

[0053] See also Figure 3 The first sootblowing mechanism 51, the second sootblowing mechanism 52 and the third sootblowing mechanism 53 of the present invention all include a first jet device 501, a second jet device 502 and a third jet device 503, and the first jet device 501, the second jet device 502 and the third jet device 503 are arranged in a row above the multi-stage catalyst 3.

[0054] The denitration reactor 1 of the present invention is further provided with a sonicator, which is located above one side of the first-stage catalyst 31 , the second-stage catalyst 32 and the third-stage catalyst 33 .

[0055] See also Figure 4 The first, second, and third jet devices 501, 502, and 503 of the present invention each include a telescopic rod 5011, a primary nozzle 5012, a secondary nozzle 5013, and multiple nozzles 5014 disposed on the secondary nozzle 5013. The telescopic rod 5011 is mounted on the outer wall of the denitration reactor 1 via a mounting bracket 5015. The primary nozzle 5012 is connected to the output end of the telescopic rod 5011 and is located within the denitration reactor 1. The secondary nozzles 5013 are evenly distributed along the axial direction and connected to both sides of the primary nozzle 5012. The telescopic rod 5011 is an electric push rod or a hydraulic push rod.

[0056] See also Figure 5 and Figure 7 The first-stage catalytic converter 31, the second-stage catalytic converter 32 and the third-stage catalytic converter 33 are arranged in the denitration reactor 1 through a sliding frame 10, and the two sides of the sliding frame 10 are threadedly connected with a screw lifting mechanism 8; the ends of the second soot blowing mechanism 52 and the third soot blowing mechanism 53 are engaged with the sliding frame 10 through a flipping mechanism 9, so that the second soot blowing mechanism 52 and the third soot blowing mechanism 53 are flipped and arranged in the denitration reactor 1.

[0057] The present invention provides a sliding frame 10 to facilitate the control of the first-stage catalyst 31, the second-stage catalyst 32 and the third-stage catalyst 33 to be raised and lowered in the denitration reactor 1 for removal and replacement. A removal opening is provided on one side of the denitration reactor 1.

[0058] See also Figure 7 and Figure 8The screw lifting mechanism 8 is composed of two groups, which are respectively arranged on both sides of the outer wall of the denitrification reactor 1. The screw lifting mechanism 8 includes a drive motor and a lifting screw. The output end of the drive motor is connected to the lifting screw through a coupling. The sliding frame 10 includes three frames. One side of the three frames is connected by multiple connecting rods. The two sides of the three frames are threadedly connected to the lifting screw through sliders, so that the drive motor can synchronously control the lifting movement of the three frames.

[0059] Example 2:

[0060] As another embodiment of the present invention, Figure 7 and Figure 8 As shown, the turning mechanism 9 of the present invention includes a sliding sleeve 91, a polygonal rod 92, a rotating disk 93, and a rotating gear 94. The sliding sleeve 91 is fixedly connected to the end of the main nozzle 5012. The polygonal rod 92 is rotatably mounted on the inner wall of the denitrification reactor 1 via a bearing. The sliding sleeve 91 slides onto the polygonal rod 92 and can rotate with the polygonal rod 92. The rotating disk 93 and the rotating gear 94 are arranged at one end of the polygonal rod 92. A plurality of push rods 101 are provided at one end of the sliding frame 10. The push rods 101 are spaced apart with a first rack 102 and a second rack 103. The sliding frame 10 is raised and lowered to cause the first rack 102 and the second rack 103 to engage with the rotating gear 94 for transmission.

[0061] Specifically, the number of teeth on the first rack 102 is less than the number of teeth on the second rack 103, so that when the push rod 101 descends, the first rack 102 first drives the rotating gear 94 to drive the main nozzle 5012 to rotate a certain angle to tilt and spray the catalyst located below it. When the push rod 101 descends to the second rack 103 and engages with the rotating gear 94, the rotating gear 94 drives the main nozzle 5012 to rotate until the nozzle 5014 on the auxiliary nozzle 5013 is vertically facing the bottom of the previous catalyst, so as to facilitate steam soot blowing on the bottom of the first-stage catalyst 31 and the second-stage catalyst 32.

[0062] See also Figure 8 and Figure 11A fixed groove 104 is axially provided on one side of the push rod 101 of the present invention, and a first entry groove 105 and a second entry groove 106 are also provided on the push rod 101, and the first entry groove 105 and the second entry groove 106 are connected to the fixed groove 104; a first protrusion 95 and a second protrusion 96 are provided on the turntable 93, and the turntable 93 is rotated to make the first protrusion 95 pass through the first entry groove 105 and enter the fixed groove 104, and the second protrusion 96 enter the fixed groove 104 through the second entry groove 106. During the descent of the push rod 101, the first protrusion 95 on the turntable 93 enters the fixed groove 104 from the first entry groove 105 through the engagement of the rotating tooth 94 with the first rack 102, so that the fixed groove 104 can limit the rotating tooth 94 through the first protrusion 95, thereby limiting the main nozzle 5012 after rotating to a certain angle, so that it can maintain a certain inclination angle until the rotating tooth 94 engages with the second rack 103. At this time, through the descent of the push rod 101, the first protrusion 95 disengages from the fixed groove 104 through the second entry groove 106, and the second protrusion 96 enters the fixed groove 104 through the second entry groove 106, so that the nozzle 5014 on the auxiliary nozzle 5013 can be horizontally facing the lower bottom surfaces of the first catalyst and the second catalyst.

[0063] Furthermore, the main nozzles 5012 on the second and third sootblowing mechanisms 52, 53 of the present invention are rotatably connected to a steam pipe connector 5016, which is in turn fixedly connected to the output end of the telescopic rod 5011. Since the main nozzle 5012 of the first sootblowing mechanism 51 does not require rotation, the main nozzle 5012 thereon does not need to be rotatably connected to the steam pipe connector 5016.

[0064] Example 3:

[0065] As one embodiment of the present invention, Figure 6 As shown, the first rack 102 and the second rack 103 meshed on both sides of the second soot blowing mechanism 52 are arranged horizontally opposite to each other, and the first rack 102 and the second rack 103 meshed on both sides of the third soot blowing mechanism 53 are arranged horizontally opposite to each other.

[0066] Specifically, the carriage 10 is provided with a first push rod for controlling the rotation of the second sootblowing mechanism 52 and a second push rod for controlling the rotation of the third sootblowing mechanism 53. There are three first push rods and three second push rods, respectively. The first racks 102 and second racks 103 on the push rods 101 at either end of the first push rod are aligned horizontally, allowing the two main nozzles 5012 on either side of the three main nozzles 5012 to rotate synchronously in different directions during the descent of the push rod 101. This allows the two main nozzles 5012 on either side to tilt the auxiliary nozzles 5013 to perform steam soot spraying on the catalyst located below. The main nozzle 5012 located in the middle of the three main nozzles 5012 can rotate synchronously with the main nozzles 5012 on one side during the descent of the push rod 101.

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make many possible changes and modifications to the technical solution of the present invention using the above technical content, or modify it into an equivalent embodiment with equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. An industrial furnace flue gas denitrification and heat recovery device, characterized in that: include: A denitration reactor (1), wherein the smoke inlet (11) is connected to the smoke exhaust port of the low-nitrogen burner; An air preheater (2), one end of which is connected to the smoke outlet (12) of the denitration reactor (1), and the other end of which is connected to the air inlet of the low-nitrogen burner, so that the waste heat of the flue gas passing through the denitration reactor (1) passes through the air preheater (2) to preheat the air entering the low-nitrogen burner; A multi-stage catalyst (3) is arranged in the denitration reactor (1); an ammonia generator (4), arranged at the smoke inlet (11) of the denitration reactor (1); A soot blowing mechanism (5) is provided in the denitration reactor (1) and is located above the multi-stage catalyst (3); A reflux pipe (6) is connected to the smoke outlet (12) and the smoke inlet (11) of the denitration reactor (1); A switching plate (7) is rotatably arranged at the return duct (6) so as to switch the smoke outlet (12) to communicate with the return duct (6) and the air preheater (2) respectively; A nitrogen oxide sensor for monitoring the emission content of nitrogen oxides is provided in the smoke outlet (12); the switching plate (7) is opened and closed in the return pipe (6) by an electric push rod or a pneumatic push rod; the nitrogen oxide sensor and the electric push rod or the pneumatic push rod are both electrically connected to a controller; The multi-stage catalyst (3) includes a first-stage catalyst (31), a second-stage catalyst (32), and a third-stage catalyst (33); the soot blowing mechanism (5) includes a first soot blowing mechanism (51), a second soot blowing mechanism (52), and a third soot blowing mechanism (53); the first soot blowing mechanism (51), the second soot blowing mechanism (52), and the third soot blowing mechanism (53) are respectively arranged above the first-stage catalyst (31), the second-stage catalyst (32), and the third-stage catalyst (33); The first-stage catalyst (31), the second-stage catalyst (32), and the third-stage catalyst (33) are arranged in the denitration reactor (1) via a sliding frame (10), and screw lifting mechanisms (8) are threadedly connected to both sides of the sliding frame (10); the ends of the second soot blowing mechanism (52) and the third soot blowing mechanism (53) are engaged with the sliding frame (10) via a flipping mechanism (9), so that the second soot blowing mechanism (52) and the third soot blowing mechanism (53) are flipped and arranged in the denitration reactor (1); The flip mechanism (9) includes a sliding sleeve (91), a polygonal rod (92), a turntable (93) and a rotating gear (94). The polygonal rod (92) is rotatably arranged on the inner wall of the denitrification reactor (1) through a bearing. The sliding sleeve (91) is slidably sleeved on the polygonal rod (92). The turntable (93) and the rotating gear (94) are arranged at one end of the polygonal rod (92). A plurality of push rods (101) are provided at one end of the sliding frame (10). The push rods (101) are spaced apart and provided with a first rack (102) and a second rack (103). The sliding frame (10) is lifted and lowered to make the first rack (102) and the second rack (103) respectively mesh with the rotating gear (94) for transmission.

2. The industrial furnace flue gas denitrification and heat recovery device according to claim 1, characterized in that: The ammonia generator (4) is provided with a plurality of nozzles, and the nozzles are provided with a plurality of nozzles; the ammonia generator (4) is also connected to the pipeline of the air inlet through a pipeline.

3. The industrial furnace flue gas denitrification and heat recovery device according to claim 1, characterized in that: The first soot blowing mechanism (51), the second soot blowing mechanism (52) and the third soot blowing mechanism (53) all comprise a first jet device (501), a second jet device (502) and a third jet device (503), and the first jet device (501), the second jet device (502) and the third jet device (503) are arranged in a row above the multi-stage catalyst (3).

4. The industrial furnace flue gas denitrification and heat recovery device according to claim 3, characterized in that: The first jet device (501), the second jet device (502) and the third jet device (503) all comprise a telescopic rod (5011), a main nozzle (5012), an auxiliary nozzle (5013) and a plurality of nozzles (5014) arranged on the auxiliary nozzle (5013); the telescopic rod (5011) is arranged on the outer wall surface of the denitration reactor (1) via a mounting frame (5015); the main nozzle (5012) is connected to the output end of the telescopic rod (5011) and is located in the denitration reactor (1); the auxiliary nozzles (5013) are evenly distributed along the axial direction and connected to both sides of the main nozzle (5012).

5. The industrial furnace flue gas denitrification and heat recovery device according to claim 4, characterized in that: The sliding sleeve (91) is fixedly connected to the end of the main nozzle (5012).

6. The industrial furnace flue gas denitrification and heat recovery device according to claim 4, characterized in that: A fixed groove (104) is axially provided on one side of the push rod (101), and a first entry groove (105) and a second entry groove (106) are also provided on the push rod (101), and the first entry groove (105) and the second entry groove (106) are communicated with the fixed groove (104); a first protrusion (95) and a second protrusion (96) are provided on the turntable (93), and the turntable (93) is rotated so that the first protrusion (95) passes through the first entry groove (105) and enters the fixed groove (104), and the second protrusion (96) passes through the second entry groove (106) and enters the fixed groove (104).

7. The industrial furnace flue gas denitrification and heat recovery device according to claim 6, characterized in that: The first rack (102) and the second rack (103) meshed on both sides of the second soot blowing mechanism (52) are arranged horizontally opposite to each other, and the first rack (102) and the second rack (103) meshed on both sides of the third soot blowing mechanism (53) are arranged horizontally opposite to each other.

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