Flue gas denitration mechanism for hot blast stove

Abstract

The utility model provides a flue gas denitration mechanism for a hot blast stove. The flue gas denitration mechanism for the hot-blast stove comprises the hot-blast stove, a side door is installed on the side wall of the left end of the hot-blast stove through a hinge, a handle is installed on the outer wall of the side door, a combustion device and an air inlet pipe are installed on the outer wall of the side door, and the combustion device and the air inlet pipe both penetrate into the hot-blast stove; an inner cylinder is mounted on the inner wall of the left end of the hot-blast stove. According to the flue gas denitration mechanism for the hot-blast stove, high-temperature flue gas generated in the inner barrel is pumped into the annular bin through the flue gas pipeline by the flue gas suction pump and is in contact with a reducing agent, and at the moment, the fan blades continuously rotate under the action of the flue gas, so that the transmission rod is driven to continuously rotate; the transmission rod drives the stirring blades to continuously and fully stir the reducing agent, so that nitrogen oxides in the flue gas are in full contact with the reducing agent and are reduced into nitrogen and water, and finally, the denitrated flue gas passes through the gas outlet pipe, is filtered by the filtering assembly and is discharged out of the hot-blast stove.

Description

Technical Field

[0001] The utility model relates to the technical field of hot blast stoves, in particular to a flue gas denitration mechanism for hot blast stoves. Background Art

[0002] Hot blast furnaces generate a large amount of flue gas during combustion, which contains nitrogen oxides (NOx), such as nitric oxide (NO) and nitrogen dioxide (NO2). These nitrogen oxides can cause serious environmental pollution, such as acid rain and photochemical smog, and are also harmful to human health. Therefore, denitrification treatment of hot blast furnace flue gas is extremely necessary.

[0003] The existing hot blast furnace flue gas denitrification mechanism only removes nitrogen oxides in the flue gas during the flue gas denitrification process, and does not fully utilize the high temperature in the flue gas, resulting in heat loss in the hot blast furnace.

[0004] Therefore, it is necessary to provide a flue gas denitrification mechanism for a hot blast stove to solve the above technical problems. Utility Model Content

[0005] The utility model provides a flue gas denitration mechanism for a hot blast stove, which solves the problem of heat loss in the hot blast stove.

[0006] In order to solve the above technical problems, the utility model provides a flue gas denitrification mechanism for a hot blast stove, comprising: a hot blast stove, wherein the left end side wall of the hot blast stove is provided with a side door through a hinge, the outer wall of the side door is provided with a handle, the outer walls of the side door are provided with a combustion device and an air intake pipe respectively, the combustion device and the air intake pipe both pass through the interior of the hot blast stove, an inner cylinder is provided with an inner wall of the left end of the hot blast stove, a storage plate is provided on the inner wall of the inner cylinder, a fence is provided on the top of the storage plate, and a flue gas pipe is provided between the inner cylinder and the outer wall of the top of the hot blast stove A smoking pump is installed near the air inlet end of the flue gas duct, a mounting bracket is installed near the inner wall of the air outlet end of the flue gas duct, a mounting plate is installed between the inner walls of the mounting bracket, a transmission rod is rotatably connected to the bottom of the mounting plate, a plurality of groups of fan blades are evenly installed on the outer wall of the upper end of the transmission rod, a plurality of groups of stirring blades are installed on the bottom of the transmission rod, a liquid inlet pipe is installed on the outer wall of the right end of the hot blast stove, a liquid drain pipe is installed on the outer wall of the bottom of the hot blast stove, an air outlet pipe is installed on the top of the hot blast stove, and a filter assembly is installed on the air outlet end of the air outlet pipe.

[0007] Preferably, the filter assembly includes limiting grooves, several groups of the limiting grooves are evenly opened on the top of the air outlet pipe, the inner walls of several groups of the limiting grooves are plugged into limiting blocks, and filters are installed between the outer walls of several groups of the limiting blocks.

[0008] Preferably, an annular ring is rotatably connected to the outer wall of the upper end of the air outlet pipe, and several groups of baffles are evenly installed on the top of the annular ring, and the bottoms of the several groups of baffles are in close contact with the top of the limit block.

[0009] Preferably, a notch is provided on the outer wall of the lower end of the annular ring, a groove is provided on the outer wall of the air outlet pipe located at the notch, a bump is slidably connected to the inner wall of the groove, and a spring is installed between the inner wall of the bump and the inner wall of the groove.

[0010] Preferably, two groups of slide grooves are evenly opened on the outer wall of the left end of the hot air furnace, and the inner walls of the two groups of slide grooves are plugged and connected with slide bars, and the storage plate is fixedly connected to the slide bars.

[0011] Preferably, a collection cover is installed at the bottom of the storage plate.

[0012] Compared with the related art, the flue gas denitrification mechanism for hot blast furnaces provided by the present invention has the following beneficial effects:

[0013] The utility model provides a flue gas denitrification mechanism for a hot blast furnace, wherein a smoking pump pumps the high-temperature flue gas generated inside an inner cylinder to the inside of an annular bin through a flue gas pipe, and contacts with a reducing agent. At this time, the fan blades are continuously rotated by the action of the flue gas, thereby driving a transmission rod to continuously rotate, so that the transmission rod drives a stirring blade to continuously and fully stir the reducing agent, so that the nitrogen oxides inside the flue gas are fully contacted with the reducing agent and are reduced to nitrogen and water. Finally, the flue gas after denitrification is filtered through an exhaust pipe and a filter component and discharged from the hot blast furnace. Through the interaction of the above components, not only the power of the flue gas is used to drive the stirring blade to continuously and fully stir the reducing agent, so that the nitrogen oxides inside the flue gas are fully contacted with the reducing agent and are reduced to nitrogen and water for denitrification, but also the high-temperature flue gas can transfer heat to the inside of the reducing agent, thereby insulating the outer wall of the inner cylinder and reducing heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a preferred embodiment of a flue gas denitrification mechanism for a hot blast furnace provided by the present invention;

[0015] Figure 2 for Figure 1 The schematic diagram of the internal structure of the hot blast stove shown;

[0016] Figure 3 for Figure 1 A schematic structural diagram of the storage plate structure shown;

[0017] Figure 4 for Figure 2 An enlarged schematic diagram of part A is shown;

[0018] Figure 5 for Figure 2An enlarged schematic diagram of part B is shown.

[0019] Numbers in the figure: 1. hot air stove, 2. side door, 3. handle, 4. drain pipe, 5. combustion device, 6. air inlet pipe, 7. air outlet pipe, 8. filter assembly, 81. filter screen, 82. annular ring, 83. baffle, 84. limit groove, 85. limit block, 9. flue gas duct, 10. collection cover, 11. storage plate, 12. enclosure, 13. inner cylinder, 14. smoking pump, 15. liquid inlet pipe, 16. slide, 17. slide bar, 18. bump, 19. groove, 20. spring, 21. mounting bracket, 22. mounting plate, 23. fan blade, 24. transmission rod, 25. stirring blade. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0021] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of a flue gas denitrification mechanism for a hot blast furnace provided by the present invention; Figure 2 for Figure 1 The schematic diagram of the internal structure of the hot blast stove shown; Figure 3 for Figure 1 A schematic structural diagram of the storage plate structure shown; Figure 4 for Figure 2 An enlarged schematic diagram of part A is shown; Figure 5 for Figure 2The enlarged schematic diagram of part B is shown. The flue gas denitrification mechanism for the hot blast stove includes: a hot blast stove 1, a side door 2 is installed on the left side wall of the hot blast stove 1 through a hinge, a handle 3 is installed on the outer wall of the side door 2, a combustion device 5 and an air intake pipe 6 are installed on the outer walls of the side door 2 respectively, and the combustion device 5 and the air intake pipe 6 are both penetrated into the hot blast stove 1, an inner cylinder 13 is installed on the inner wall of the left end of the hot blast stove 1, the outer wall of the inner cylinder 13 and the inner wall of the hot blast stove 1 form a closed annular bin, and the inner cylinder 13 is made of heat-conducting material, a storage plate 11 is installed on the inner wall of the inner cylinder 13, a fence 12 is installed on the top of the storage plate 11, the storage plate 11 is hollow, and the setting of the fence 12 prevents the burning material from falling, and a fire extinguisher is installed between the inner cylinder 13 and the outer wall of the top of the hot blast stove 1 There is a flue gas pipe 9, a smoking pump 14 is installed near the air inlet end of the flue gas pipe 9, a mounting frame 21 is installed near the inner wall of the air outlet end of the flue gas pipe 9, a mounting plate 22 is installed between the inner walls of the mounting frame 21, and a transmission rod 24 is rotatably connected to the bottom of the mounting plate 22. The bottom of the transmission rod 24 is located inside the annular bin, and several groups of fan blades 23 are evenly installed on the outer wall of the upper end of the transmission rod 24. Several groups of stirring blades 25 are installed on the bottom of the transmission rod 24. A liquid inlet pipe 15 is installed on the outer wall of the right end of the hot blast furnace 1, and the liquid inlet pipe is connected to the inside of the annular bin. A drain pipe 4 is installed on the outer wall of the bottom of the hot blast furnace 1, and an outlet pipe 7 is installed on the top of the hot blast furnace 1. A filter assembly 8 is installed on the outlet end of the outlet pipe 7.

[0022] The filter assembly 8 includes limiting grooves 84, and several groups of limiting grooves 84 are evenly opened on the top of the air outlet pipe 7. The inner walls of several groups of limiting grooves 84 are plugged into limiting blocks 85, and filter screens 81 are installed between the outer walls of several groups of limiting blocks 85.

[0023] The outer wall of the upper end of the air outlet pipe 7 is rotatably connected with an annular ring 82, and several groups of baffles 83 are evenly installed on the top of the annular ring 82. The bottoms of several groups of baffles 83 are in contact with the top of the limit block 85. When the annular ring 82 is rotated, when the baffle 83 leaves the top of the limit groove 84, the filter screen 81 installed with the limit block 85 can be taken out from the limit groove 84.

[0024] A notch is provided on the outer wall of the lower end of the annular ring 82, and a groove 19 is provided on the outer wall of the air outlet pipe 7 located at the notch. A protrusion 18 is slidably connected to the inner wall of the groove 19, and a spring 20 is installed between the inner wall of the protrusion 18 and the inner wall of the groove 19. The protrusion 18 is squeezed to enter the inner wall of the groove 19, thereby leaving the restriction on the annular ring 82 and rotating the annular ring 82.

[0025] Two groups of slide grooves 16 are evenly opened on the outer wall of the left end of the hot air furnace 1. The inner walls of the two groups of slide grooves 16 are connected with slide bars 17. The storage plate 11 is fixedly connected to the slide bars 17. When the storage plate 11 needs to be replaced, the storage plate 11 can be pulled out along the slide grooves 16.

[0026] A collecting cover 10 is installed at the bottom of the placing plate 11. The collecting cover 10 has a closed right end and an open left end in an arc shape, and is used to collect the slag after combustion.

[0027] The working principle of the flue gas denitrification mechanism for a hot blast furnace provided by the present invention is as follows: a reducing agent is injected into the annular bin through the liquid inlet pipe 15, the side door 2 is opened by the handle 3, the combustible material is placed on the storage plate 11, the combustible material is ignited by the combustion device 5 for combustion, and the smoking pump 14 pumps the high-temperature flue gas generated inside the inner cylinder 13 into the annular bin through the flue gas pipe 9 to contact the reducing agent. At this time, the fan blades 23 are continuously rotated by the flue gas, thereby driving the transmission rod 24 to continuously rotate, so that the transmission rod 24 drives the stirring blades 25 to continuously stir the reducing agent, so that the nitrogen oxides inside the flue gas are fully contacted with the reducing agent and are reduced to nitrogen and water. Finally, the denitrified flue gas is filtered through the filter assembly 8 through the outlet pipe 7 and discharged from the hot blast furnace 1.

[0028] Compared with the related art, the flue gas denitrification mechanism for hot blast furnaces provided by the present invention has the following beneficial effects:

[0029] The smoking pump 14 pumps the high-temperature flue gas generated inside the inner tube 13 into the annular bin through the flue gas pipe 9 to contact the reducing agent. At this time, the fan blades 23 are continuously rotated by the flue gas, thereby driving the transmission rod 24 to continuously rotate, so that the transmission rod 24 drives the stirring blades 25 to continuously stir the reducing agent, so that the nitrogen oxides inside the flue gas are fully contacted with the reducing agent and are reduced to nitrogen and water. Finally, the denitrified flue gas is filtered through the filter assembly 8 through the outlet pipe 7 and discharged from the hot air furnace 1. Through the interaction of the above components, not only the power of the flue gas is used to drive the stirring blades 25 to continuously stir the reducing agent, so that the nitrogen oxides inside the flue gas are fully contacted with the reducing agent and are reduced to nitrogen and water for denitrification, but also the high-temperature flue gas can transfer heat to the inside of the reducing agent, thereby keeping the outer wall of the inner tube 13 warm and reducing heat loss.

[0030] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flue gas denitrification mechanism for a hot blast stove, characterized in that: include: The blast furnace has a left side wall that is provided with a side door through a hinge, and a handle is installed on the outer wall of the side door, and a combustion device and an air intake pipe are respectively installed on the outer walls of the side door, and the combustion device and the air intake pipe both pass through the interior of the hot blast furnace, and an inner cylinder is installed on the inner wall of the left end of the hot blast furnace, and a storage plate is installed on the inner wall of the inner cylinder, and a fence is installed on the top of the storage plate. A flue gas duct is installed between the inner cylinder and the outer wall of the top of the hot blast furnace, and a smoking pump is installed near the air inlet end of the flue gas duct, and a mounting bracket is installed near the inner wall of the air outlet end of the flue gas duct, and a mounting plate is installed between the inner walls of the mounting bracket, and a transmission rod is rotatably connected to the bottom of the mounting plate, and several groups of fan blades are evenly installed on the outer wall of the upper end of the transmission rod, and several groups of stirring blades are installed on the bottom of the transmission rod. A liquid inlet pipe is installed on the outer wall of the right end of the hot blast furnace, a liquid drain pipe is installed on the outer wall of the bottom of the hot blast furnace, an air outlet pipe is installed on the top of the hot blast furnace, and a filter assembly is installed at the air outlet end of the air outlet pipe.

2. The flue gas denitrification mechanism for a hot blast stove according to claim 1, characterized in that: The filter assembly includes limiting grooves, several groups of the limiting grooves are evenly opened on the top of the air outlet pipe, the inner walls of several groups of the limiting grooves are plugged and connected to limiting blocks, and filters are installed between the outer walls of several groups of the limiting blocks.

3. The flue gas denitrification mechanism for a hot blast stove according to claim 2, characterized in that: An annular ring is rotatably connected to the outer wall of the upper end of the air outlet pipe, and a plurality of groups of baffles are evenly installed on the top of the annular ring, and the bottoms of the plurality of groups of baffles are in contact with the top of the limiting block.

4. The flue gas denitrification mechanism for a hot blast stove according to claim 3, characterized in that: A notch is provided on the outer wall of the lower end of the annular ring, a groove is provided on the outer wall of the air outlet pipe located at the notch, a convex block is slidably connected to the inner wall of the groove, and a spring is installed between the inner wall of the convex block and the inner wall of the groove.

5. The flue gas denitrification mechanism for a hot blast stove according to claim 1, characterized in that: Two groups of slide grooves are evenly opened on the outer wall of the left end of the hot air furnace, and the inner walls of the two groups of slide grooves are plugged and connected with slide bars, and the storage plate is fixedly connected to the slide bars.

6. The flue gas denitrification mechanism for a hot blast stove according to claim 1, characterized in that: A collecting cover is installed at the bottom of the storage plate.

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