Ultralow-temperature co-combustion shaft kiln denitration device

Abstract

The invention relates to the technical field of shaft kiln denitration, and particularly discloses an ultralow-temperature co-combustion shaft kiln denitration device which comprises a flue gas channel, a denitration channel is arranged at the end of the flue gas channel, a denitration block is arranged in the denitration channel and serves as a catalyst, a first-stage cooling component is arranged in the flue gas channel, and a second-stage cooling component is arranged in the first-stage cooling component. The first-stage cooling component comprises heat dissipation fins fixedly connected to the outer wall of the smoke channel in a sleeving mode. According to the ultralow-temperature co-combustion shaft kiln denitration device provided by the invention, by arranging the first arc-shaped plate and the heat dissipation fins, smoke passing through the first-stage cooling interval can be rapidly subjected to heat absorption, the smoke temperature is effectively reduced, then the consumed amount of carbon monoxide is reduced, and finally the catalytic oxidation efficiency can be improved; moreover, when the set air pressure is reached each time, the first arc-shaped plate can be driven to move, so that flue gas flows smoothly, hot air absorbing heat in the period of time can be discharged to the outside, external cold air is sucked into the heat conduction cylinder, and finally the purpose of temperature control is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of vertical kiln denitration, and in particular to an ultra-low temperature mixed-firing vertical kiln denitration device. Background Art

[0002] CO-SCR denitrification is a CO denitrification reaction, which is a technology that uses CO as a reducing agent to catalyze the reduction of nitrogen oxides (NOx). Since CO is cheap, lime kiln flue gas contains a large amount of CO, and is easy to obtain, CO denitrification is currently one of the hot spots in the field of flue gas denitrification. CO denitrification uses CO as a reducing agent to reduce nitrogen oxides in flue gas to nitrogen under the action of a catalyst.

[0003] However, in the prior art, most of the denitrification is carried out at high temperature, but high temperature denitrification will accelerate the reaction of oxygen and carbon monoxide to produce carbon dioxide, thereby consuming part of the carbon monoxide, and further causing the CO as a reducing agent to be lost, resulting in unsatisfactory catalytic efficiency. The lack of cooling and temperature control components controls the temperature at a low temperature. Summary of the invention

[0004] The object of the present invention is to provide an ultra-low temperature mixed-firing vertical kiln denitrification device to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A super-low temperature mixed-firing vertical kiln denitration device comprises a flue gas channel, a denitration channel is arranged at the end of the flue gas channel, a denitration block is arranged in the denitration channel, the denitration block is a catalyst, a primary cooling component is arranged inside the flue gas channel, the primary cooling component comprises a heat dissipation fin fixedly sleeved on the outer wall of the flue gas channel, and a heat conduction cylinder is also arranged inside the flue gas channel; The top of the heat-conducting tube is conical, and a plurality of first sliding grooves are provided at the side end of the heat-conducting tube. A first arc-shaped plate is slidably connected to the inner wall of the first sliding groove. The first arc-shaped plate is made of heat-conducting material. A heat-conducting rod is fixedly connected between the first arc-shaped plate and the heat-dissipating fin. The first arc-shaped plate turns the flue gas channel into a narrow primary cooling zone. An elastic limiting component is fixedly connected between the inner wall of the first sliding groove and the first arc-shaped plate. When flue gas containing carbon monoxide passes through the primary cooling zone, the temperature decreases, thereby reducing the reaction rate of carbon monoxide and oxygen, thereby reducing the carbon monoxide loss rate; When the air pressure on one side of the first arc plate increases to a set pressure, the elastic limiting component drives the first arc plate to contract, thereby increasing the space of the primary cooling zone and allowing the flue gas to pass smoothly.

[0006] Further, the elastic limiting component includes an elastic block fixedly connected to the top of the first arc-shaped plate, a first heat absorption chamber is provided inside the heat-conducting cylinder, the first heat absorption chamber is communicated with a plurality of first sliding grooves, a guide groove is provided on an inner wall of the first heat absorption chamber, a return spring is fixedly connected between a pair of the first arc-shaped plates on opposite sides, and a compression block is fixedly connected to the side end of the first arc-shaped plate.

[0007] Furthermore, a heat exhaust component is provided inside the heat absorption chamber, and the heat exhaust component includes an exhaust pipe fixedly connected to the outer end of the heat-conducting tube, a second heat absorption chamber is opened inside the heat-conducting tube, the first heat absorption chamber and the second heat absorption chamber are communicated with each other, and an air outlet is opened at the outer end of the heat-conducting tube near the second heat absorption chamber, a one-way valve is provided inside the air outlet, and the air outlet is communicated with the exhaust pipe.

[0008] Furthermore, a temperature control component is provided on the exhaust pipe, and the temperature control component includes a heat preservation cover, and a heat preservation pipe is fixedly connected to the side end of the heat preservation cover, and an exhaust hole is opened on the heat preservation pipe. The temperature control component is used to discharge the hot air in the first heat absorption chamber to the outside every time the set first time is reached, and to inhale the outside normal temperature gas.

[0009] Furthermore, a switching component is provided on the outside of the denitrification block, and the switching component includes a first rotating shaft fixedly connected to the end of the denitrification block, a first bevel gear is fixedly sleeved on the end of the first rotating shaft, a second rotating shaft is provided outside the denitrification channel, a second bevel gear is fixedly sleeved on the bottom of the second rotating shaft, the first bevel gear is meshingly connected with the second bevel gear, and the switching component is used for driving the denitrification block to rotate a set angle each time a set second time is reached, thereby switching the adsorption gas area of ​​the catalyst.

[0010] Furthermore, a transmission component is provided on the first rotating shaft, and the transmission component includes a first rotating disk fixedly sleeved on the top end of the second rotating shaft, a plurality of first shifting rods are fixedly connected to the first rotating disk, a friction sleeve is fixedly sleeved on the flue gas channel, a friction hole is opened on the friction sleeve, the second rotating shaft rotates on the inner wall of the friction hole, a second rotating disk is rotatably sleeved on the flue gas channel, and a second shifting rod is fixedly connected to the second rotating disk.

[0011] Furthermore, a driving component is provided on the transmission component, and the driving component includes a turntable rotatably sleeved on the outer end of the flue gas duct, a plurality of arc blocks are fixedly connected to the inner wall of the turntable, a protrusion is fixedly connected to the heat preservation cover, a push plate is fixedly connected to the bottom of the turntable, and a push column is provided on the second turntable. When the protrusion moves outward, it pushes the turntable to rotate, so that the second turntable rotates accordingly.

[0012] Furthermore, an arc groove is provided on the second turntable, an arc spring is fixedly connected to the arc groove, the push column is slidably connected to the inner wall of the arc groove, and a reset member is fixedly connected between the outer wall of the turntable and the outer wall of the smoke channel.

[0013] Furthermore, a pin is fixedly connected to the top surface of the friction sleeve, a one-way ratchet is rotatably connected to the outer end of the pin, a plurality of limit blocks are fixedly connected to the bottom of the second turntable, and the one-way ratchet conflicts with one of the limit blocks.

[0014] Furthermore, a secondary cooling component is provided on the heat-conducting tube, and the secondary cooling component includes a second arc-shaped plate. A plurality of second sliding grooves are opened at the side end of the heat-conducting tube, and the second arc-shaped plate slides inside the second sliding grooves. The interval between the first arc-shaped plate and the second arc-shaped plate is the secondary cooling interval.

[0015] In the above technical scheme, the ultra-low temperature mixed-firing vertical kiln denitrification device provided by the present invention has the following beneficial effects: By arranging the first curved plate and the heat dissipation fins, the flue gas close to the inner wall of the flue gas channel is heat absorbed by the heat dissipation fins, and the flue gas far from the inner wall of the flue gas channel is heat absorbed by the first curved plate, and the first curved plate transfers the heat to the heat dissipation fins through the heat conduction rod, so that the flue gas passing through the primary cooling zone will be quickly heat-absorbed, effectively reducing the flue gas temperature, thereby reducing the consumption of carbon monoxide, and ultimately improving the catalytic oxidation efficiency; not only that, each time the set air pressure is reached, not only can the first curved plate be driven to move to allow the flue gas to flow smoothly, but also the hot air absorbed during this period of time can be discharged to the outside, and the outside cold air can be sucked into the heat conduction tube, ultimately achieving the purpose of temperature control.

[0016] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0017] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the overall external structure provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure provided in Embodiment 1 of the present invention; Figure 3 A schematic diagram of a partial cross-sectional structure provided in Embodiment 1 of the present invention; Figure 4 The first embodiment of the present invention provides Figure 3 A schematic diagram of the enlarged structure at point A; Figure 5 A schematic diagram of the external structure of a first curved plate provided in Embodiment 1 of the present invention; Figure 6 A schematic diagram of the structure of a switching component provided in Embodiment 1 of the present invention; Figure 7 A schematic diagram of the structure of a transmission component and a driving component provided in Embodiment 1 of the present invention; Figure 8 A schematic diagram of a structure in which a transmission component and a driving component are separated according to a first embodiment of the present invention; Fig. 9 The first embodiment of the present invention provides Figure 8 A schematic diagram of the enlarged structure at B; Fig.10 A schematic diagram of the overall cross-sectional structure provided in Embodiment 2 of the present invention; Fig.11 This is a schematic diagram of a partial cross-sectional structure provided in Embodiment 2 of the present invention.

[0020] Description of reference numerals: 1. Flue gas channel; 2. Denitration channel; 21. Denitration block; 3. Primary cooling component; 31. Heat dissipation fins; 32. Heat-conducting tube; 33. First arc plate; 34. Heat-conducting rod; 4. Elastic limiting component; 41. Elastic block; 42. First heat absorption chamber; 43. Guide groove; 44. Reset spring; 45. Compression block; 5. Heat exhaust component; 51. Exhaust pipe; 52. Second heat absorption chamber; 6. Temperature control component; 61. Insulation cover; 62. Insulation pipe; 63. Exhaust hole; 7. Switching component; 71. First rotating shaft; 72. First bevel gear; 73. First Second rotating shaft; 74, second bevel gear; 8, transmission component; 81, first rotating disk; 82, first shifting rod; 83, friction sleeve; 84, second rotating disk; 85, second shifting rod; 9, driving component; 91, turntable; 92, arc block; 93, convex block; 94, push plate; 95, push column; 96, arc groove; 97, arc spring; 98, reset part; 99, pin; 910, one-way ratchet; 10, secondary cooling component; 101, second arc plate; 102, heat transfer rod; 103, heat sink; 104, pressure spring; 105, heat transfer groove. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. Embodiment 1

[0022] See also Figure 1-2 , a super-low temperature mixed-firing vertical kiln denitration device, comprising a flue gas channel 1, a denitration channel 2 is arranged at the end of the flue gas channel 1, a denitration block 21 is arranged in the denitration channel 2, the denitration block 21 is a catalyst, a primary cooling component 3 is arranged inside the flue gas channel 1, the primary cooling component 3 comprises a heat dissipation fin 31 fixedly sleeved on the outer wall of the flue gas channel 1, and a heat conduction tube 32 is also arranged inside the flue gas channel 1; the top of the heat conduction tube 32 is conical, and a plurality of first sliding grooves are opened at the side end of the heat conduction tube 32, and a first arc plate 33 is slidably connected to the inner wall of the first sliding groove, the first arc plate 33 adopts a heat conducting material, and a heat conduction rod 34 is fixedly connected between the first arc plate 33 and the heat dissipation fin 31, and the first arc plate 33 turns the flue gas channel 1 into a narrow primary cooling zone, and an elastic limiting component 4 is fixedly connected between the inner wall of the first sliding groove and the first arc plate 33; When flue gas containing carbon monoxide passes through the primary cooling zone, the temperature decreases, thereby reducing the reaction rate of carbon monoxide and oxygen, thereby reducing the carbon monoxide loss rate; Specifically, the flue gas temperature range of the mixed-firing vertical kiln is usually 80-150 degrees. The flue gas contains carbon monoxide and nitrogen monoxide. During actual emission, nitrogen monoxide needs to be reduced to nitrogen, otherwise nitric acid is easily generated and does not meet the industrial emission standards. However, in the process of the flue gas passing through the catalyst, due to the high temperature, oxygen and carbon monoxide will react, resulting in excessive consumption of carbon monoxide. Carbon monoxide is used as a reducing agent. Therefore, in order to improve the catalytic oxidation reaction efficiency of carbon monoxide as a reducing agent, the temperature of the flue gas should be appropriately lowered, and the catalyst used should also be able to remain active at low temperatures, for example: including molybdenum-based, vanadium-based, platinum-based, palladium-based and iron-based catalysts, etc. These catalysts can effectively reduce the emission of nitrogen oxides under low temperature conditions, and can be selected according to actual needs. The purpose of this device is to control the temperature of the flue gas so that it is within 60-90 degrees.

[0023] The heat dissipation fins 31 are cylindrical and made of heat-conducting metal material; the heat-conducting rods 34 are also made of heat-conducting metal material and are of a telescopic structure; the upper portion of the first curved plate 33 is a curved streamlined shape, and the lower portion is a plane. The curved streamlined shape is similar to the shape of an aircraft shell, which can facilitate the circulation of smoke. The plane can squeeze the smoke and reduce the space for the smoke to pass through, so that the smoke can better contact with the heat dissipation fins 31 and the first curved plate 33.

[0024] By providing a conical heat-conducting tube 32, the flue gas can flow along the conical surface, which will not only not hinder the flow of the flue gas, but also allow the flue gas to absorb heat by the heat-conducting tube 32. The flue gas further comes between the first curved plate 33 and the heat-dissipating fins 31, and the flue gas close to the inner wall of the flue gas channel 1 is absorbed by the heat-dissipating fins 31, and the flue gas away from the inner wall of the flue gas channel 1 is absorbed by the first curved plate 33. The first curved plate 33 transfers the heat to the heat-dissipating fins 31 through the heat-conducting rod 34. The flue gas passing through the primary cooling interval will be quickly heat-absorbed, which effectively reduces the flue gas temperature. The subsequent contact with the catalyst can improve the catalytic oxidation efficiency.

[0025] When the air pressure on one side of the first arc plate 33 increases to a set pressure, the elastic limiting component 4 drives the first arc plate 33 to contract, so that the space of the primary cooling zone is increased, and the smoke passes smoothly.

[0026] Specifically, since the space becomes narrower after the first-stage cooling zone, after a period of time (5-15 minutes), the pressure reaches the rated value, which squeezes the first arc plate 33, so that the smoke can pass smoothly and avoid blockage.

[0027] See also Figure 3-5 In an embodiment further provided by the present invention, the elastic limiting component 4 includes an elastic block 41 fixedly connected to the top of the first arc-shaped plate 33, a first heat absorption cavity 42 is provided inside the heat-conducting tube 32, the first heat absorption cavity 42 is communicated with a plurality of first sliding grooves, a guide groove 43 is provided on the inner wall of the first heat absorption cavity 42, a return spring 44 is fixedly connected between a pair of first arc-shaped plates 33 on opposite sides, and a compression block 45 is fixedly connected to the side end of the first arc-shaped plate 33.

[0028] Specifically, a sealing gasket is provided between the first arc plate 33 and the first sliding groove.

[0029] When the air pressure on the upper side of the first curved plate 33 exceeds the rated value, the elastic block 41 will be squeezed to shrink the elastic block 41, and then the reset spring 44 will be squeezed. In the embodiment of this case, there are four first curved plates 33, and the side ends of each curved plate are fixedly connected to a compression block 45, which is in the shape of a triangular prism. During the movement of the four first curved plates 33, the four compression blocks 45 will not conflict with each other.

[0030] See also Figure 3In an embodiment further provided by the present invention, a heat exhaust component 5 is provided inside the heat absorption chamber, and the heat exhaust component 5 includes an exhaust pipe 51 fixedly connected to the outer end of the heat-conducting tube 32, and a second heat absorption chamber 52 is opened inside the heat-conducting tube 32, and the first heat absorption chamber 42 and the second heat absorption chamber 52 are communicated with each other. An air outlet is opened at the outer end of the heat-conducting tube 32 near the second heat absorption chamber 52, and a one-way valve is arranged inside the air outlet, and is communicated with the exhaust pipe 51.

[0031] The gas inside the first heat absorption chamber 42 absorbs heat through the heat-conducting tube 32 and the first arc-shaped plate 33 and starts to heat up. Part of the excessive heat is transferred to the heat dissipating fins 31 by the heat-conducting rods 34, thereby cooling the flue gas but not reducing it to too low a temperature.

[0032] See also Figure 3 In the solution further provided by the present invention, a temperature control component 6 is provided on the exhaust pipe 51, and the temperature control component 6 includes a heat preservation cover 61, and a heat preservation pipe 62 is fixedly connected to the side end of the heat preservation cover 61, and an exhaust hole 63 is opened on the heat preservation pipe 62. The temperature control component 6 is used to discharge the hot air of the first heat absorption chamber 42 to the outside every time the set first time is reached, and to inhale the outside normal temperature gas. Elastic cotton is fixedly connected between the heat preservation cover 61 and the exhaust pipe 51.

[0033] When the first curved plate 33 starts to move, the heat-conducting tube 32 and the first curved plate 33 have absorbed heat for a period of time, and the surface temperature is too high, so the cooling effect on the subsequent flue gas becomes poor. At this time, the four first curved plates 33 are close to each other, and the hot air in the first heat-absorbing chamber 42 is transported to the exhaust pipe 51 through the second heat-absorbing chamber 52, and the insulation tube 62 is pushed open to expose the exhaust hole 63 to the outside. The hot air is continuously discharged from the exhaust hole 63 to the outside. When the air pressure is stable, the first curved plate 33 returns to the initial position. Under negative pressure, the outside cold air is sucked into the first heat-absorbing chamber 42 again, and the heat-conducting tube 32 and the first curved plate 33 start to continue absorbing heat.

[0034] See also Figure 6 In a solution further provided by the present invention, a switching component 7 is provided on the outside of the denitrification block 21, and the switching component 7 includes a first rotating shaft 71 fixedly connected to the end of the denitrification block 21, and a first bevel gear 72 is fixedly sleeved on the end of the first rotating shaft 71. A second rotating shaft 73 is provided outside the denitrification channel 2, and a second bevel gear 74 is fixedly sleeved on the bottom of the second rotating shaft 73. The first bevel gear 72 is meshed with the second bevel gear 74. The switching component 7 is used to drive the denitrification block 21 to rotate a set angle every time the set second time is reached, so as to switch the adsorption gas area of ​​the catalyst.

[0035] See also Figure 7-9A transmission component 8 is provided on the first rotating shaft 71, and the transmission component 8 includes a first rotating disk 81 fixedly sleeved on the top of the second rotating shaft 73, and a plurality of first shifting rods 82 are fixedly connected to the first rotating disk 81. A friction sleeve 83 is fixedly sleeved on the flue gas channel 1, and a friction hole is opened on the friction sleeve 83. By arranging a friction damping in the friction hole, the first rotating disk 81 has no inertia each time it rotates, so that its rotation angle is consistent each time; the second rotating shaft 73 rotates on the inner wall of the friction hole, and a second rotating disk 84 is rotatably sleeved on the flue gas channel 1, and a second shifting rod 85 is fixedly connected to the second rotating disk 84.

[0036] Specifically, there are multiple friction sleeves 83 , and the friction holes are annularly concave, which can support the second rotating shaft 73 .

[0037] A driving component 9 is provided on the transmission component 8, and the driving component 9 includes a turntable 91 rotatably sleeved on the outer end of the smoke duct, a plurality of arc blocks 92 are fixedly connected to the inner wall of the turntable 91, a protrusion 93 is fixedly connected to the heat preservation cover 61, a push plate 94 is fixedly connected to the bottom of the turntable 91, and a push column 95 is provided on the second turntable 84. When the protrusion 93 moves outward, the turntable 91 is pushed to rotate, so that the second turntable 84 rotates accordingly.

[0038] The second turntable 84 is provided with an arc groove 96 , to which an arc spring 97 is fixedly connected. The push column 95 is slidably connected to the inner wall of the arc groove 96 . A reset member 98 is fixedly connected between the outer wall of the turntable 91 and the outer wall of the smoke channel 1 , and the reset member 98 is an elastic rope.

[0039] The top surface of the friction sleeve 83 is fixedly connected with a pin 99, the outer end of the pin 99 is rotatably connected with a one-way ratchet 910, and the bottom of the second rotating disk 84 is fixedly connected with a plurality of limit blocks, and the one-way ratchet 910 conflicts with one of the limit blocks.

[0040] When the four first arc plates 33 are close to each other, the four insulation tubes 62 are pushed outward by air pressure, and the insulation tube 62 drives the arc block 92 to rotate with the protrusion 93, and the arc block 92 drives the turntable 91 to rotate 5-10 degrees, then the turntable 91 rotates with the push plate 94, and the push plate 94 rotates with the push column 95, so that the second turntable 84 rotates 5-10 degrees, and then the insulation tube 62 is reset, and the turntable 91 rotates 5-10 degrees under the action of the reset member 98 (which can be an elastic rope), touches the push column 95 behind during the rotation, and pushes the push column 95 to slide along the arc groove 96, so that the push column 95 is separated from the push plate 94, and because the second turntable 84 rotates, it also rotates with the limit block, and the one-way ratchet 910 bends during the forward rotation of the limit block, and when the limit block rotates in the reverse direction, the one-way ratchet 910 will not bend, so the second turntable 84 can only rotate in one direction; The second turntable 84 rotates to a set angle (depending on the number of second levers 85. In this case, there are four second levers 85, so it rotates 90 degrees). The second lever 85 drives the first lever 82 to rotate 15-30 degrees. The number of teeth of the second bevel gear 74 is 0.5 times that of the first bevel gear 72. Therefore, the second rotating shaft 73 rotates 15-30 degrees each time, and the first rotating shaft 71 rotates 30-60 degrees. Therefore, every slightly longer period of time (estimated to be one or two hours), the catalyst will be rotated to switch the contact area with the flue gas, so that the catalyst can adsorb carbon monoxide more efficiently and is more conducive to the reaction. Embodiment 2

[0041] See also Figure 10-11 The difference between the second embodiment and the first embodiment is that the following technical features are added: a secondary cooling component 10 is provided on the heat-conducting tube 32, and the secondary cooling component 10 includes a second arc-shaped plate 101. A plurality of second sliding grooves are opened at the side end of the heat-conducting tube 32, and the second arc-shaped plate 101 slides inside the second sliding grooves. The interval between the first arc-shaped plate 33 and the second arc-shaped plate 101 is the secondary cooling interval.

[0042] Specifically, a heat sink 103 is fixedly sleeved on the outside of the smoke channel 1, and the heat sink 103 has the same function as the heat sink fin 31. A heat transfer rod 102 is fixedly connected between the heat sink 103 and the second curved plate 101, and the heat transfer rod 102 is made of heat-conducting material. An elastic block 41 is also fixedly connected to the top of the second curved plate 101. A guide groove 43 is also provided at a position of the heat-conducting tube 32 near the second curved plate 101. A third heat absorption chamber is provided between the second curved plates 101. A heat transfer groove 105 is also provided in the heat-conducting tube 32. The third heat absorption chamber is connected to the second heat absorption chamber 52 through the heat transfer groove 105. A pressure spring 104 is fixedly connected between a pair of opposite second curved plates 101, and the pressure spring 104 has the same function as the reset spring 44.

[0043] When the smoke pushes the first curved plate 33 away, the channel space expands instantly, and a large amount of smoke enters the secondary cooling zone, and is conducted and dissipated by the heat conduction tube 32, the second curved plate 101, the heat transfer rod 102 and the heat dissipation plate 103, thereby effectively avoiding that some smoke directly passes through the primary cooling zone without being cooled at the moment of space expansion, so that the smoke can be cooled for the second time, and the smoke in this area is not discharged until the pressure in the secondary cooling zone exceeds the rated value, thereby further improving the cooling efficiency of the smoke.

[0044] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An ultra-low temperature mixed-firing shaft kiln denitrification device, comprising a flue gas channel (1), a denitrification channel (2) being arranged at the end of the flue gas channel (1), a denitrification block (21) being arranged in the denitrification channel (2), the denitrification block (21) being a catalyst, characterized in that: A primary cooling component (3) is arranged inside the smoke channel (1), the primary cooling component (3) comprising a heat dissipation fin (31) fixedly sleeved on the outer wall of the smoke channel (1), and a heat conduction tube (32) is also arranged inside the smoke channel (1); The top of the heat-conducting tube (32) is conical, and a plurality of first sliding grooves are provided at the side end of the heat-conducting tube (32). A first arc plate (33) is slidably connected to the inner wall of the first sliding groove. The first arc plate (33) is made of a heat-conducting material. A heat-conducting rod (34) is fixedly connected between the first arc plate (33) and the heat-dissipating fin (31). The first arc plate (33) converts the flue gas channel (1) into a narrow primary cooling zone. An elastic limiting component (4) is fixedly connected between the inner wall of the first sliding groove and the first arc plate (33); When flue gas containing carbon monoxide passes through the primary cooling zone, the temperature decreases, thereby reducing the reaction rate of carbon monoxide and oxygen, thereby reducing the carbon monoxide loss rate; When the air pressure on one side of the first arc plate (33) increases to a set air pressure, the elastic limiting component (4) drives the first arc plate (33) to contract, thereby increasing the space of the first-stage cooling zone and allowing smoke to pass smoothly.

2. The ultra-low temperature mixed-firing vertical kiln denitrification device according to claim 1 is characterized in that: The elastic limiting component (4) comprises an elastic block (41) fixedly connected to the top of the first arc-shaped plate (33); a first heat absorption chamber (42) is provided inside the heat-conducting tube (32); the first heat absorption chamber (42) is communicated with a plurality of first sliding grooves; a guide groove (43) is provided on the inner wall of the first heat absorption chamber (42); a return spring (44) is fixedly connected between a pair of the first arc-shaped plates (33) on opposite sides; and a compression block (45) is fixedly connected to the side end of the first arc-shaped plate (33).

3. The ultra-low temperature mixed-firing vertical kiln denitrification device according to claim 2 is characterized in that: A heat dissipation component (5) is arranged inside the heat absorption chamber, and the heat dissipation component (5) comprises an exhaust pipe (51) fixedly connected to the outer end of the heat-conducting tube (32); a second heat absorption chamber (52) is provided inside the heat-conducting tube (32); the first heat absorption chamber (42) and the second heat absorption chamber (52) are communicated with each other; an air outlet is provided at the outer end of the heat-conducting tube (32) near the second heat absorption chamber (52); a one-way valve is arranged inside the air outlet, and the air outlet is communicated with the exhaust pipe (51).

4. The ultra-low temperature mixed-firing vertical kiln denitrification device according to claim 3 is characterized in that: The exhaust pipe (51) is provided with a temperature control component (6), the temperature control component (6) comprising a heat preservation cover (61), a side end of the heat preservation cover (61) being fixedly connected to a heat preservation pipe (62), the heat preservation pipe (62) being provided with an exhaust hole (63), the temperature control component (6) being used to discharge hot air from the first heat absorption chamber (42) to the outside and to inhale ambient temperature gas every time a set first time is reached.

5. The ultra-low temperature mixed-firing vertical kiln denitrification device according to claim 4 is characterized in that: A switching component (7) is arranged outside the denitrification block (21), the switching component (7) comprising a first rotating shaft (71) fixedly connected to the end of the denitrification block (21), a first bevel gear (72) being fixedly sleeved on the end of the first rotating shaft (71), a second rotating shaft (73) being arranged outside the denitrification channel (2), a second bevel gear (74) being fixedly sleeved on the bottom of the second rotating shaft (73), the first bevel gear (72) being meshingly connected with the second bevel gear (74), the switching component (7) being used to drive the denitrification block (21) to rotate to a set angle each time a set second time is reached, thereby switching the adsorption gas area of ​​the catalyst.

6. The ultra-low temperature mixed-firing vertical kiln denitrification device according to claim 5 is characterized in that: A transmission component (8) is arranged on the first rotating shaft (71), the transmission component (8) comprising a first rotating disk (81) fixedly sleeved on the top end of the second rotating shaft (73), a plurality of first shifting rods (82) fixedly connected to the first rotating disk (81), a friction sleeve (83) fixedly sleeved on the smoke passage (1), a friction hole being provided on the friction sleeve (83), the second rotating shaft (73) rotating on the inner wall of the friction hole, a second rotating disk (84) rotatably sleeved on the smoke passage (1), and a second shifting rod (85) fixedly connected to the second rotating disk (84).

7. The ultra-low temperature mixed-firing vertical kiln denitrification device according to claim 6, characterized in that: The transmission component (8) is provided with a driving component (9), the driving component (9) comprising a turntable (91) rotatably sleeved on the outer end of the smoke duct, a plurality of arc-shaped blocks (92) are fixedly connected to the inner wall of the turntable (91), a convex block (93) is fixedly connected to the heat-insulating cover (61), a push plate (94) is fixedly connected to the bottom of the turntable (91), and a push column (95) is provided on the second turntable (84), and when the convex block (93) moves outward, it pushes the turntable (91) to rotate, so that the second turntable (84) rotates accordingly.

8. The ultra-low temperature mixed-firing vertical kiln denitrification device according to claim 7, characterized in that: The second rotating disk (84) is provided with an arc-shaped groove (96), an arc-shaped spring (97) is fixedly connected to the arc-shaped groove (96), the push column (95) is slidably connected to the inner wall of the arc-shaped groove (96), and a reset member (98) is fixedly connected between the outer wall of the rotating table (91) and the outer wall of the smoke passage (1).

9. The ultra-low temperature mixed-firing vertical kiln denitrification device according to claim 8, characterized in that: A pin (99) is fixedly connected to the top surface of the friction sleeve (83), a one-way ratchet (910) is rotatably connected to the outer end of the pin (99), a plurality of limit blocks are fixedly connected to the bottom of the second rotating disk (84), and the one-way ratchet (910) is in conflict with one of the limit blocks.

10. The ultra-low temperature mixed-firing vertical kiln denitrification device according to claim 4, characterized in that: A secondary cooling component (10) is arranged on the heat-conducting tube (32), and the secondary cooling component (10) comprises a second arc-shaped plate (101). A plurality of second sliding grooves are provided at the side end of the heat-conducting tube (32), and the second arc-shaped plate (101) slides inside the second sliding grooves. The area between the first arc-shaped plate (33) and the second arc-shaped plate (101) is a secondary cooling area.

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