A desulfurization device and method for a cement kiln high-temperature fan outlet by adding pure sodium bicarbonate

Abstract

The application belongs to the technical field of sulfur dioxide treatment, and is especially a cement kiln high-temperature fan outlet pure sodium bicarbonate desulfurization equipment and method. The treatment equipment comprises a discharging mechanism, a crushing mechanism and a quantitative feeder. The discharging mechanism comprises a dustproof discharging assembly, a discharging ton bag assembly, a driving moving assembly and a driving discharging assembly. The dustproof discharging assembly can realize dust-free discharging in cooperation with the discharging ton bag assembly on the inner side. Through the arranged treatment equipment, sulfur dioxide can be treated under the condition of only adding sodium bicarbonate. Sodium bicarbonate is added at the outlet end of the high-temperature fan. The amount of sodium bicarbonate added is adjusted until the rising trend of sulfur dioxide stops through the rising speed and concentration of sulfur dioxide in the kiln tail flue gas. When sulfur dioxide reaches the upper limit value of the national allowable emission, the added sodium bicarbonate runs at a stable amount, so that the use effect of sodium bicarbonate can be determined when it is stably running at the use amount of standard emission.

Description

Technical Field

[0001] This invention belongs to the field of sulfur dioxide treatment technology, specifically relating to a desulfurization device and method for adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln. Background Technology

[0002] During the cement production process, a large amount of SO2 is emitted. The SO2 in the cement industry waste gas mainly comes from sulfur-containing compounds in cement raw materials or fuels, as well as sulfur oxides generated under high-temperature oxidation conditions. Although there are many methods for treating SO2, most of them combine multiple solutions. Moreover, due to the influence of the treatment equipment, SO2 treatment will also cause environmental pollution to a certain extent. Summary of the Invention

[0003] To address the problems mentioned in the background section, this invention provides a desulfurization device and method for adding pure sodium bicarbonate at the outlet of a high-temperature blower in a cement kiln, which features the ability to treat sulfur dioxide even with only the addition of sodium bicarbonate.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a desulfurization device for adding pure sodium bicarbonate at the outlet of a high-temperature blower in a cement kiln, which uses pure sodium bicarbonate as a desulfurizing agent; the processing equipment includes a feeding mechanism, a crushing mechanism, and a quantitative auger feeder;

[0005] The feeding mechanism includes a dustproof feeding component, a feeding ton bag component, an active moving component, and an active feeding component. The dustproof feeding component can work with the inner feeding ton bag component to achieve dust-free feeding. The inner side of the dustproof feeding component is also equipped with the active feeding component that actively causes the feeding ton bag component to release material.

[0006] As a preferred embodiment of the desulfurization equipment for adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln according to the present invention, the dust-proof feeding assembly includes a feeding pipe, a flared pipe, a contracted pipe, an annular elastic airbag, an interconnecting air pipe, and an air inlet pipe. The top end of the feeding pipe is configured as the flared pipe. The contracted pipe is connected to the lower side of the flared pipe portion of the feeding pipe. The annular elastic airbag is fixedly installed inside the annular protrusion on the upper side of the contracted pipe portion of the feeding pipe. One end of the annular elastic airbag is fixedly connected to the interconnecting air pipe, and the other end of the annular elastic airbag is fixedly connected to the air inlet pipe.

[0007] As a preferred embodiment of the desulfurization equipment for adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln according to the present invention, the ton bag assembly includes a ton bag layer, a ton bag lifting strap, and a cross hanger. The bottom end of the cylindrical ton bag layer is provided with a circular opening, the ton bag lifting strap is fixedly connected to the outside of the ton bag layer, and the top end of the ton bag lifting strap contacts the cross hanger.

[0008] As a preferred embodiment of the desulfurization equipment for adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln according to the present invention, the ton bag assembly further includes a rigid support ring, an elastic band, a Velcro layer, a circular inner bottom layer, and a protruding part. The rigid support ring is fixedly connected to the inner side of the top of the ton bag layer, the elastic band is installed on the inner side of the bottom opening of the ton bag layer, the Velcro layer is fixedly connected to the bottom surface of the ton bag layer, the circular inner bottom layer is fixedly connected to the top of the Velcro layer, and a protruding part that deforms downward and extends out of the bottom opening of the ton bag layer is provided at the center of the circular inner bottom layer.

[0009] As a preferred embodiment of the desulfurization equipment for adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln according to the present invention, the active moving component includes a cross bracket, a fixed outer shell, an annular magnet, a movable inner tube, an annular limiting ring, and a return spring. One end of the cross bracket is fixedly connected to the inner side of the bottom end of the contraction pipe, and the other end of the cross bracket is fixedly connected to the fixed outer shell. The annular magnet is fixedly connected to the upper side of the outer end face of the fixed outer shell. The movable inner tube is slidably connected to the inner side of one end of the movable inner tube. The annular limiting ring is slidably connected to the inner wall surface of the fixed outer shell. The return spring is fixedly connected between the outer side of the top end of the annular limiting ring and the inner side of the top end of the fixed outer shell.

[0010] As a preferred embodiment of the desulfurization equipment for adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln according to the present invention, the active moving component further includes a vertical channel, an annular channel, a movable magnet, a movable sealing valve, and a first compression spring. Multiple vertical channels are evenly distributed on the inner side of the annular limiting ring, and the top ends of each vertical channel are connected to the annular channel. The movable magnet is slidably connected to the inner side of one end of the annular limiting ring, and the movable sealing valve is fixedly connected to the outer side of one end of the movable magnet. The movable sealing valve is movably positioned at the vertical channel location and can block one end of the vertical channel. The number of movable magnets and the number of movable sealing valves corresponds to the number of vertical channels. The first compression spring is fixedly connected between the outer side of one end of the movable magnet and the inner side of one end of the annular limiting ring.

[0011] As a preferred embodiment of the desulfurization equipment for adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln according to the present invention, the active feeding assembly includes an outer annular shell, an arc-shaped edge-receiving shell, a cross blade, an inner annular tube, a rigid connecting tube, a trident blade, and a spike. The outer bottom of the outer annular shell is fixedly connected to the outer top of the movable inner tube. The arc-shaped edge-receiving shell is fixedly connected to the outer top of the outer annular shell. The cross blade is fixedly connected to the inner wall of one end of the outer annular shell. The inner annular tube is fixedly connected to one end of the cross blade. The rigid connecting tube is fixedly connected to the outer bottom of the inner annular tube. A filter screen is provided on the inner side of the rigid connecting tube. The bottom of the rigid connecting tube is fixedly connected to one end of the annular channel. The trident blade is fixedly connected to the inner wall of one end of the inner annular tube. The rod-shaped spike is fixedly connected to the outer side of one end of the trident blade.

[0012] As a preferred embodiment of the desulfurization equipment for adding pure sodium bicarbonate at the outlet of a high-temperature blower in a cement kiln according to the present invention, the active feeding assembly further includes a blocking rod, an arc-shaped head limiting block, a second compression spring, and a third compression spring. The blocking rod is slidably disposed on the inner side of one end of the outer annular shell and extends out from the outer side of the arc-shaped edge shell. The extension length of the blocking rod is higher than the top position of the spike. The arc-shaped head limiting block is slidably connected to the inner side of the bottom end of the blocking rod. The two arc-shaped head limiting blocks are fixedly connected to each other by the second compression spring. The third compression spring is fixedly connected between the outer side of the bottom end of the blocking rod and the inner side of the bottom end of the outer annular shell.

[0013] As a preferred embodiment of the desulfurization equipment for adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln according to the present invention, the crushing mechanism includes a crushing shell, an inner support bracket, an inner conical grinding part, a plate-shaped bracket, a circular plate bracket, a drive motor, a conical grinding part, shallow groove spiral threads, and a plane bearing. The outer side of the top of the crushing shell is fixedly connected to the outer side of the bottom end of the shrinkage pipe. The inner support bracket is fixedly connected to the inner wall of one end of the crushing shell. The inner conical grinding part is fixedly connected to one end of the inner support bracket. The plate-shaped bracket is fixedly connected to the inner wall of the bottom end of the crushing shell. The circular plate bracket is fixedly connected to one end of the plate-shaped bracket. The drive motor is fixedly connected to the inner side of the center position of one end of the circular plate bracket. The conical grinding part is fixedly connected to the end of the main shaft of the drive motor. The gap between the conical grinding part and the inner conical grinding part gradually decreases from top to bottom. The shallow groove spiral threads with a continuous downward thread direction are opened on the conical surface of the conical grinding part. The plane bearing is fixedly connected between the outer side of the bottom end of the conical grinding part and the outer side of the top of the circular plate bracket.

[0014] A method for desulfurization by adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln, characterized in that:

[0015] The sulfur dioxide is treated by adding pure sodium bicarbonate to the outlet of the high-temperature blower of the cement kiln as described in any of the aforementioned technical solutions; pure sodium bicarbonate is used as the desulfurizing agent.

[0016] A quantitative model for desulfurizing agents is used to calculate the dosage of sodium bicarbonate. This model quantitatively adjusts the dosage of desulfurizing agents based on the rising rate and concentration of sulfur dioxide in the kiln tail flue gas. The desulfurizing agent is automatically and quantitatively administered through a desulfurization device that adds pure sodium bicarbonate at the outlet of the cement kiln high-temperature fan until the rising trend of sulfur dioxide stops. Once the sulfur dioxide reaches the national upper limit for allowable emissions, the added sodium bicarbonate operates at a stable level.

[0017] S1: A mathematical model and closed-loop algorithm for quantitatively adjusting the sulfur-fixing agent by detecting the rising rate and concentration of sulfur dioxide in the kiln tail flue gas, as well as the various functional modules of the closed-loop algorithm in the control system.

[0018] S2: Desulfurizing agent quantitative adjustment algorithm, including the desulfurizing agent quantitative model, as well as the information interaction, logical judgment and quantitative instructions between online monitoring data and quantitative model;

[0019] S3: Hardware facilities for automated and quantitative administration of sulfur-fixing agents, including control system, lifting mechanism, bag cutting mechanism, loosening mechanism, and conveying mechanism.

[0020] Compared with existing technologies, the beneficial effects of this invention are: by setting up a processing device, sulfur dioxide can be treated even with only sodium bicarbonate added. Sodium bicarbonate is added at the outlet of a high-temperature fan, and the amount added is adjusted by the rising rate and concentration of sulfur dioxide in the kiln tail flue gas until the rising trend of sulfur dioxide stops. When the sulfur dioxide reaches the upper limit of the national allowable emission, the added sodium bicarbonate operates at a stable amount, thus achieving stable operation at the usage amount to determine the effect of carbonic acid use while meeting emission standards. At the same time, in the traditional process of adding sodium bicarbonate, there is a problem of dust flying during the unloading of sodium bicarbonate, which will cause environmental pollution. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0024] Figure 3This is a cross-sectional view of the feeding mechanism in this invention;

[0025] Figure 4 This is a cross-sectional view of the overall structure of the feeding ton bag assembly in this invention;

[0026] Figure 5 In this invention Figure 4 An enlarged structural diagram at point A;

[0027] Figure 6 This is a cross-sectional view of the actively feeding component in its contracted state in this invention;

[0028] Figure 7 In this invention Figure 6 A magnified structural diagram at point B;

[0029] Figure 8 This is a cross-sectional view of the active feeding component in the extended state of the present invention;

[0030] Figure 9 In this invention Figure 8 A magnified structural diagram at point C;

[0031] Figure 10 This is a schematic diagram of the active feeding component in this invention;

[0032] Figure 11 In this invention Figure 10 A magnified structural diagram at point D;

[0033] Figure 12 This is a three-dimensional structural diagram of the active feeding component in this invention;

[0034] Figure 13 This is a structural separation diagram of the outer annular shell in this invention;

[0035] Figure 14 This is a schematic diagram of the outer annular shell structure in this invention;

[0036] Figure 15 This is a cross-sectional view of the crushing mechanism in this invention.

[0037] In the picture:

[0038] 1. Processing equipment;

[0039] 2. Feeding mechanism;

[0040] 21. Dustproof feeding assembly; 211. Feeding pipe; 212. Flared pipe; 213. Shrink pipe; 214. Annular elastic airbag; 215. Interconnecting air pipe; 216. Air inlet pipe;

[0041] 22. Material feeding ton bag assembly; 221. Ton bag layer; 222. Rigid support ring; 223. Elastic band; 224. Velcro layer; 225. Circular inner bottom layer; 226. Protruding part; 227. Ton bag lifting strap; 228. Cross hanger;

[0042] 23. Active moving component; 231. Cross bracket; 232. Fixed housing; 233. Ring magnet; 234. Movable inner tube; 235. Ring limiting ring; 2351. Return spring; 236. Vertical channel; 237. Ring channel; 238. Movable magnet; 239. Movable sealing valve; 2310. First compression spring;

[0043] 24. Active feeding assembly; 241. Outer annular housing; 242. Arc-shaped edge-trimming housing; 243. Cross blade; 244. Inner annular tube; 2441. Rigid connecting tube; 245. Trident blade; 246. Spike; 247. Barrier lever; 248. Arc-shaped head limiting block; 249. Second compression spring; 2491. Third compression spring;

[0044] 3. Crushing mechanism; 31. Crushing shell; 32. Inner support bracket; 33. Inner conical grinding part; 34. Plate-shaped bracket; 35. Circular plate bracket; 36. Drive motor; 37. Conical grinding part; 38. Shallow groove spiral pattern; 39. Surface bearing;

[0045] 4. Quantitative auger feeder. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] like Figure 1-15 As shown:

[0048] A desulfurization device and method for adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln, wherein the processing device 1 includes a feeding mechanism 2, a crushing mechanism 3, and a quantitative auger feeder 4;

[0049] The feeding mechanism 2 includes a dustproof feeding component 21, a feeding ton bag component 22, an active moving component 23, and an active feeding component 24. The dustproof feeding component 21 can work with the inner feeding ton bag component 22 to achieve dust-free feeding. The inner side of the dustproof feeding component 21 is also equipped with an active feeding component 24 that actively causes the feeding ton bag component 22 to discharge materials.

[0050] Furthermore;

[0051] In an optional embodiment, the dustproof feeding assembly 21 includes a feeding pipe 211, a flared pipe 212, a shrinking pipe 213, an annular elastic airbag 214, an interconnecting air pipe 215, and an air inlet pipe 216. The top end of the feeding pipe 211 is configured as a flared pipe 212. The lower side of the flared pipe 212 portion of the feeding pipe 211 is connected to the shrinking pipe 213. The annular elastic airbag 214 is fixedly installed inside the annular protrusion on the upper side of the shrinking pipe 213 portion of the feeding pipe 211. One end of the annular elastic airbag 214 is fixedly connected to the interconnecting air pipe 215, and the other end of the annular elastic airbag 214 is fixedly connected to the air inlet pipe 216.

[0052] In an optional embodiment, the unloading ton bag assembly 22 includes a ton bag layer 221, a ton bag carrying strap 227, and a cross hanger 228. The bottom end of the cylindrical ton bag layer 221 is provided with a circular opening. The ton bag carrying strap 227 is fixedly connected to the outside of the ton bag layer 221, and the top end of the ton bag carrying strap 227 contacts the cross hanger 228.

[0053] In an optional embodiment, the ton bag assembly 22 further includes a rigid support ring 222, an elastic band 223, a Velcro layer 224, a circular inner bottom layer 225, and a protrusion 226. The rigid support ring 222 is fixedly connected to the inner side of the top of the ton bag layer 221, the elastic band 223 is installed on the inner side of the bottom opening of the ton bag layer 221, the Velcro layer 224 is fixedly connected to the bottom surface of the ton bag layer 221, the circular inner bottom layer 225 is fixedly connected to the top of the Velcro layer 224, and a protrusion 226 that deforms downward and extends out of the bottom opening of the ton bag layer 221 is provided at the center of the circular inner bottom layer 225.

[0054] In an optional embodiment, the active moving component 23 includes a cross bracket 231, a fixed housing 232, an annular magnet 233, a movable inner tube 234, an annular limiting ring 235, and a return spring 2351. One end of the cross bracket 231 is fixedly connected to the inner side of the bottom end of the contraction tube 213, and the other end of the cross bracket 231 is fixedly connected to the fixed housing 232. The annular magnet 233 is fixedly connected to the upper side of the outer end face of the fixed housing 232. The movable inner tube 234 is slidably connected to the inner side of the fixed housing 232. The annular limiting ring 235 is fixedly connected to the outer side of one end of the movable inner tube 234. The outer end face of the annular limiting ring 235 is slidably connected to the inner wall surface of the fixed housing 232. The return spring 2351 is fixedly connected between the outer side of the top end of the annular limiting ring 235 and the inner side of the top end of the fixed housing 232.

[0055] In an optional embodiment, the active moving component 23 further includes a vertical channel 236, an annular channel 237, a movable magnet 238, a movable sealing valve 239, and a first compression spring 2310. Multiple vertical channels 236 are evenly distributed on the inner side of the annular limiting ring 235, and the top ends of each vertical channel 236 are connected to the annular channel 237. A movable magnet 238 is slidably connected to the inner side of one end of the annular limiting ring 235, and a movable sealing valve 239 is fixedly connected to the outer side of one end of the movable magnet 238. The movable sealing valve 239 is movably positioned at the location of the vertical channel 236 and can block one end of the vertical channel 236. The number of movable magnets 238 and movable sealing valves 239 corresponds to the number of vertical channels 236. A first compression spring 2310 is fixedly connected between the outer side of one end of the movable magnet 238 and the inner side of one end of the annular limiting ring 235.

[0056] In an optional embodiment, the active feeding assembly 24 includes an outer annular housing 241, an arc-shaped edge-receiving housing 242, a cross blade 243, an inner annular tube 244, a rigid connecting tube 2441, a trident blade 245, and a spike 246. The outer bottom end of the outer annular housing 241 is fixedly connected to the outer top end of the movable inner tube 234, and the arc-shaped edge-receiving housing 242 is fixedly connected to the outer top end of the outer annular housing 241. The inner wall surface of one end of the outer annular housing 241 is fixedly connected to... There is a cross blade 243, one end of which is fixedly connected to an inner annular tube 244. The bottom outer side of the inner annular tube 244 is fixedly connected to a rigid connecting tube 2441. A filter screen is provided on the inner side of the rigid connecting tube 2441. The bottom end of the rigid connecting tube 2441 is fixedly connected to one end of an annular channel 237. A trident blade 245 is fixedly connected to the inner wall of one end of the inner annular tube 244. A rod-shaped spike 246 is fixedly connected to the outer side of one end of the trident blade 245.

[0057] In an optional embodiment, the active feeding assembly 24 further includes a blocking rod 247, an arc-shaped head limiting block 248, a second compression spring 249, and a third compression spring 2491. The blocking rod 247 is slidably disposed on the inner side of one end of the outer annular housing 241 and protrudes from the outer side of the arc-shaped edge housing 242. The protruding length of the blocking rod 247 is higher than the top position of the spike 246. The arc-shaped head limiting block 248 is slidably connected to the inner side of the bottom end of the blocking rod 247. The two arc-shaped head limiting blocks 248 are fixedly connected to each other by the second compression spring 249. The third compression spring 2491 is fixedly connected between the outer side of the bottom end of the blocking rod 247 and the inner side of the bottom end of the outer annular housing 241.

[0058] In an optional embodiment, the pulverizing mechanism 3 includes a pulverizing shell 31, an inner support bracket 32, an inner conical grinding part 33, a plate-shaped bracket 34, a circular plate bracket 35, a drive motor 36, a conical grinding part 37, a shallow groove thread 38, and a plane bearing 39. The outer top of the pulverizing shell 31 is fixedly connected to the outer side of the bottom end face of the contraction pipe 213. The inner support bracket 32 ​​is fixedly connected to the inner wall of one end of the pulverizing shell 31. The inner conical grinding part 33 is fixedly connected to one end of the inner support bracket 32. The inner wall of the bottom end of the pulverizing shell 31 is fixedly connected to... A plate-shaped bracket 34 is attached, and a circular plate bracket 35 is fixedly connected to one end of the plate-shaped bracket 34. A drive motor 36 is fixedly connected to the inner center of one end of the circular plate bracket 35. A conical grinding part 37 is fixedly connected to the end of the main shaft of the drive motor 36. The gap between the conical grinding part 37 and the inner conical grinding part 33 gradually decreases from top to bottom. Shallow grooves 38 with continuous downward threading are opened on the conical surface of the conical grinding part 37. A plane bearing 39 is fixedly connected between the outer bottom end of the conical grinding part 37 and the outer top end of the circular plate bracket 35.

[0059] In this embodiment: Sodium bicarbonate is filled into the ton bag layer 221. Before filling the sodium bicarbonate, the circular inner bottom layer 225 needs to be fixed to the inner bottom of the ton bag layer 221 by the Velcro layer 224. Then, sufficient sodium bicarbonate is first filled into the inner side of the protruding part 226 of the circular inner bottom layer 225. Through the filling of sodium bicarbonate, the protruding part 226 can maintain a certain shape, so that the bottom opening of the ton bag layer 221 will not become smaller due to the elastic contraction of the elastic band 223. Therefore, the protruding part 226 of the circular inner bottom layer 225 will not be compressed due to the smaller bottom opening of the ton bag layer 221. Finally, the bottom opening of the ton bag layer 221 is of an appropriate size, which can meet the insertion and penetration of the active feeding component 24 to continue feeding. Sufficient sodium bicarbonate is filled into the inner side of the ton bag layer 221. Then, a hoisting device moves the ton bag lifting strap 227 by activating the cross-shaped lifting bracket 228. The lifting strap 227 moves the ton bag layer 221, thus moving the sodium bicarbonate. When the ton bag layer 221 moves directly above the discharge pipe 211, the hoisting device moves it downwards. By setting the upper part of the discharge pipe 211 as a flared pipe 212, the cross-shaped lifting bracket 228 can enter the flared pipe 212. The lower part of the discharge pipe 211 is set as a shrinkable pipe 213 to reduce the gap between the inner wall of the shrinkable pipe 213 and the ton bag layer 221, facilitating subsequent dust prevention. When the ton bag layer 221 moves downwards to the discharge pipe... After the contraction pipe 213 of channel 211 is completed, and the rigid support ring 222 in the ton bag layer 221 is at the same height as the annular elastic airbag 214, the movement of the ton bag layer 221 is stopped. An external high-pressure air pump inflates the inside of the annular elastic airbag 214 through the air inlet pipe 216, causing the annular elastic airbag 214 to expand. After expansion, the annular elastic airbag 214 contacts the outer layer of the ton bag layer 221. Because the rigid support ring 222 is provided on the inner side of the ton bag layer 221, it can maintain its original shape even after all the sodium bicarbonate inside the ton bag layer 221 has been unloaded (referring only to the portion of the ton bag layer 221 supported by the rigid support ring 222). After the annular elastic airbag 214 expands and contacts the outer layer of the ton bag layer 221… The annular elastic airbag 214 cannot continue to inflate. During this process, when an external high-pressure air pump inflates the inside of the annular elastic airbag 214 through the air inlet pipe 216, the gas inside the annular elastic airbag 214 will be discharged outward through the interconnecting air pipe 215. However, the gas can only be discharged to the inside of the fixed outer shell 232 due to the restriction of gas flow by the annular limiting ring 235. If more gas needs to enter the inside of the fixed outer shell 232, the gas needs to push the annular limiting ring 235 upward. However, the annular limiting ring 235 cannot easily move upward due to the elastic force of the return spring 2351, and the elastic force of the return spring 2351 is greater than the elastic force of the annular elastic airbag 214 during inflation.Therefore, before the annular elastic airbag 214 expands and contacts the outer layer of the ton bag layer 221, the gas cannot push the annular limiting ring 235 upward. After the annular elastic airbag 214 expands and contacts the outer side of the ton bag layer 221, it will be unable to continue expanding. Therefore, the gas pressure entering the inner side of the fixed outer shell 232 will increase, allowing the gas to push the annular limiting ring 235 upward against the elastic force of the return spring 2351. The upward movement of the annular limiting ring 235 will drive the movable inner tube 234 upward. The upward movement of the movable inner tube 234 will drive the active feeding component 24 to pierce the inner side of the protrusion 226 of the circular inner bottom layer 225, piercing the protrusion 226. The spike 246 will first pierce the protrusion 226, and then the cutting of the protrusion 226 by the trident blade 245 can further enlarge the opening of the protrusion 226. As the cross blade 243 continues to penetrate, it can... The cross blade 243 further enlarges the opening of the protrusion 226. As the cross blade 243 continues to penetrate deeper, the outer annular shell 241 will pass through the protrusion 226 together. Before the outer annular shell 241 passes through the protrusion 226, the arc-shaped edge shell 242 guides the outer annular shell 241 through the protrusion 226. After the outer annular shell 241 passes through the protrusion 226, it will not stop moving, but will continue to move deeper until the outer annular shell 241 is completely inside the ton bag layer 221. Before the outer annular shell 241 is completely inside the ton bag layer 221, the sodium bicarbonate inside the ton bag layer 221 cannot be completely unloaded. Therefore, there will still be sodium bicarbonate supporting the inside of the protrusion 226, preventing the bottom opening of the ton bag layer 221 from contracting. This allows the outer annular shell 241 to smoothly enter the inside of the ton bag layer 221 without damaging the ton bag layer 221.

[0060] Before the spike 246 contacts the protrusion 226, the blocking lever 247 contacts the outer bottom end of the protrusion 226. As the spike 246 penetrates into the inner side of the outer annular shell 241 and enters the ton bag layer 221, the blocking lever 247 is obstructed and retracts to the inner side of the outer annular shell 241. During the movement of the blocking lever 247 towards the inner side of the outer annular shell 241, the blocking lever 247 overcomes the elastic force of the third compression spring 2491. The arc-shaped head limiting block 248 restricts the movement range of the blocking lever 247, preventing it from being obstructed. Excessive extension of the baffle rod 247 causes it to separate from the outer annular housing 241. Only under a large external force will the arc-shaped head limiting block 248 be squeezed by the inner wall of the outer annular housing 241, thus overcoming the elastic force of the second compression spring 249 and entering the inner side of the baffle rod 247, thereby achieving the separation of the baffle rod 247 from the outer annular housing 241. Similarly, this method can also be applied to the installation of the baffle rod 247. Only after the outer annular housing 241 enters the inner side of the ton bag layer 221 will the baffle rod 247 be extended by the elastic force of the third compression spring 2491.

[0061] After the annular limiting ring 235 moves upward to its maximum stroke, and the outer annular shell 241 is fully inside the ton bag layer 221, the annular limiting ring 235 is also at its closest position to the annular magnet 233. At this time, the magnetic force of the annular magnet 233 will affect the movable magnet 238 inside the annular limiting ring 235, causing the movable magnet 238 to move against the spring force of the first compression spring 2310 in the direction of the annular magnet 233. After the movable magnet 238 moves, it will drive the movable sealing valve 239 to move together. After the movable sealing valve 239 moves, it will no longer be in contact with the vertical channel 236. The gas inside the fixed housing 232 is blocked, allowing it to pass through the vertical channel 236 into the inner side of the annular channel 237. The gas inside the annular channel 237 then enters the rigid connecting pipe 2441, and continues into the inner annular pipe 244. Finally, it is ejected from the inner annular pipe 244 into the inner side of the ton bag layer 221, thus agitating the inner side of the ton bag layer 221 and improving the feeding efficiency of sodium bicarbonate inside the ton bag layer 221. However, the gas entering the inner side of the ton bag layer 221 can cause insufficient gas pressure inside the fixed housing 232, triggering the return spring 2351. This will push the annular limiting ring 235 downwards. After the annular limiting ring 235 moves downwards, it will eventually drive the outer annular housing 241 downwards. When the annular limiting ring 235 moves away from the annular magnet 233, the magnetic force between the annular magnet 233 and the movable magnet 238 will weaken. The first compression spring 2310 will push the movable magnet 238 to move. The movement of the movable magnet 238 will drive the movable sealing valve 239 to move and re-block the vertical channel 236. After the vertical channel 236 is blocked, the continuous gas supply will cause the air pressure inside the fixed housing 232 to continue to increase, thereby causing the annular limiting ring 235 to move downwards. The ring moves upward again until the annular limiting ring 235 moves upward to a position close to the annular magnet 233. This allows the annular limiting ring 235 to move downward a short distance after reaching the highest position, and then move upward again to the highest position. Furthermore, the outer annular shell 241 will also move up and down, shuttling back and forth at the bottom opening of the ton bag layer 221. However, the outer annular shell 241 will never separate from the bottom opening of the ton bag layer 221. In this way, the active feeding component 24 can move up and down continuously, avoiding blockage when feeding material from the bottom of the ton bag layer 221, and making the feeding operation smoother.

[0062] After the material is unloaded, the high-pressure air pump is turned off, thus stopping the gas supply to the inside of the annular elastic airbag 214 through the air inlet pipe 216. Due to the small gap between the fixed outer shell 232 and the movable inner tube 234, after the new gas supply stops, the gas inside the fixed outer shell 232 and the gas inside the annular elastic airbag 214 will both be discharged outwards through this gap. This causes the annular elastic airbag 214 to contract due to its own elasticity, and the annular limiting ring 235 will descend back to its original position due to the elastic force of the return spring 2351. When the outer annular shell 241 is pulled outwards from the opening of the ton bag layer 221, the extended blocking rod 247 can block the bottom opening of the ton bag layer 221 from contacting the cross blade 243 and the trident blade 245, thus preventing the bottom opening of the ton bag layer 221 from being cut by the cross blade 243 and the trident blade 245. This facilitates the reuse of the ton bag layer 221 in subsequent ton bag layers 221. When reused, simply tear off the circular inner bottom layer 225, replace it with a new circular inner bottom layer 225, and re-fix it to the bottom inner side of the ton bag layer 221 using the Velcro layer 224. After the active feeding component 24 is completely separated from the ton bag layer 221, the elastic band 223 at the bottom of the ton bag layer 221 will contract, thereby tightening the bottom opening of the ton bag layer 221. This prevents the remaining sodium bicarbonate powder that is difficult to unload from the inside of the ton bag layer 221 from falling off when the ton bag layer 221 is moved, causing environmental pollution. Similarly, it should be understood that during the feeding process, the outer side of the ton bag layer 221 is wrapped by the annular elastic airbag 214 to prevent sodium bicarbonate powder from flying upward through the gap between the ton bag layer 221 and the feeding pipe 211, causing environmental pollution. In this way, the problem of sodium bicarbonate powder flying during the feeding process and causing environmental pollution can be greatly reduced.

[0063] It should also be understood that when the outer annular shell 241 is inserted into the inner side of the ton bag layer 221, the sodium bicarbonate powder inside the ton bag layer 221 is mainly fed through the inner space of the outer annular shell 241. The sodium bicarbonate powder fed from the inner side of the outer annular shell 241 will continue to be fed downward through the movable inner tube 234 until the sodium bicarbonate powder falls onto the conical grinding part 37 in the crushing shell 31. Although the sodium bicarbonate inside the ton bag layer 221 is a powdered substance, due to long-term storage, some sodium bicarbonate will clump together. However, the clumps will not be very large. Therefore, when continuing to use, the clumps of sodium bicarbonate need to be ground into powder. This is done by energizing the drive motor 36, which will drive the conical grinding part 37 to rotate. The rotation of the conical grinding section 37 causes the sodium bicarbonate that falls into the gap between the conical grinding section 37 and the inner conical grinding section 33 to rotate as well. As the sodium bicarbonate rotates with the conical grinding section 37, the shallow, downward-facing spiral grooves 38 on the conical grinding section 37 cause the sodium bicarbonate to move downward as well. The gap between the conical grinding section 37 and the inner conical grinding section 33 gradually narrows, thus grinding the sodium bicarbonate that falls downward from the gap between the conical grinding section 37 and the inner conical grinding section 33 into powder. This process grinds the clumped sodium bicarbonate into powder, which then falls into the quantitative auger feeder 4 for quantitative feeding, thus completing the quantitative addition of sodium bicarbonate.

[0064] A method for desulfurization by adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln includes the following steps:

[0065] S1: A mathematical model and closed-loop algorithm for quantitatively adjusting the sulfur-fixing agent by detecting the rising rate and concentration of sulfur dioxide in the kiln tail flue gas, as well as the various functional modules of the closed-loop algorithm in the control system.

[0066] S2: Desulfurizing agent quantitative adjustment algorithm, including the desulfurizing agent quantitative model, as well as the information interaction, logical judgment and quantitative instructions between online monitoring data and quantitative model;

[0067] S3: Hardware facilities for automated and quantitative administration of sulfur-fixing agents, including control system, lifting mechanism, bag cutting mechanism, loosening mechanism, and conveying mechanism.

[0068] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A desulfurization device for adding pure sodium bicarbonate at the outlet of a high-temperature blower in a cement kiln, characterized in that: Pure sodium bicarbonate was used as the desulfurizing agent; The processing equipment (1) includes a feeding mechanism (2), a crushing mechanism (3) and a quantitative auger feeder (4); The feeding mechanism (2) includes a dustproof feeding component (21), a feeding ton bag component (22), an active moving component (23), and an active feeding component (24). The dustproof feeding component (21) can cooperate with the inner feeding ton bag component (22) to achieve dust-free feeding. The inner side of the dustproof feeding component (21) is also equipped with the active feeding component (24) that actively causes the feeding ton bag component (22) to discharge materials. The dustproof feeding assembly (21) includes a feeding pipe (211), a flared pipe (212), a shrinking pipe (213), an annular elastic airbag (214), an interconnecting air pipe (215), and an air inlet pipe (216). The top end of the feeding pipe (211) is set as the flared pipe (212). The shrinking pipe (213) is connected to the lower side of the flared pipe (212) of the feeding pipe (211). The annular elastic airbag (214) is fixedly installed on the inner side of the annular protrusion on the upper side of the shrinking pipe (213) of the feeding pipe (211). One end of the annular elastic airbag (214) is fixedly connected to the interconnecting air pipe (215), and the other end of the annular elastic airbag (214) is fixedly connected to the air inlet pipe (216). The unloading ton bag assembly (22) includes a ton bag layer (221), a ton bag carrying strap (227), and a cross hanger (228). The bottom end of the cylindrical ton bag layer (221) is provided with a circular opening. The ton bag carrying strap (227) is fixedly connected to the outside of the ton bag layer (221), and the top end of the ton bag carrying strap (227) contacts the cross hanger (228). The ton bag assembly (22) further includes a rigid support ring (222), an elastic band (223), a Velcro layer (224), a circular inner bottom layer (225), and a protruding part (226). The rigid support ring (222) is fixedly connected to the inner side of the top of the ton bag layer (221). The elastic band (223) is installed on the inner side of the bottom opening of the ton bag layer (221). The Velcro layer (224) is fixedly connected to the bottom surface of the ton bag layer (221). The circular inner bottom layer (225) is fixedly connected to the top of the Velcro layer (224). A protruding part (226) that deforms downward and extends out of the bottom opening of the ton bag layer (221) is provided at the center of the circular inner bottom layer (225). The active moving component (23) includes a cross bracket (231), a fixed housing (232), an annular magnet (233), a movable inner tube (234), an annular limiting ring (235), and a return spring (2351). One end of the cross bracket (231) is fixedly connected to the inner side of the bottom end of the contraction pipe (213), and the other end of the cross bracket (231) is fixedly connected to the fixed housing (232). The annular magnet (233) is fixedly connected to the upper side of the outer end face of the fixed housing (232). The movable inner tube (234) is slidably connected to the inner side of the fixed housing (232). The annular limiting ring (235) is fixedly connected to the outer side of one end of the movable inner tube (234). The outer end face of the annular limiting ring (235) is slidably connected to the inner wall surface of the fixed housing (232). The return spring (2351) is fixedly connected between the outer side of the top end of the annular limiting ring (235) and the inner side of the top end of the fixed housing (232). The active moving component (23) further includes a vertical channel (236), an annular channel (237), a movable magnet (238), a movable sealing valve (239), and a first compression spring (2310). Multiple vertical channels (236) are evenly distributed on the inner side of the annular limiting ring (235), and the top ends of the multiple vertical channels (236) are connected to the annular channel (237). The movable magnet (238) is slidably connected to the inner side of one end of the annular limiting ring (235). The movable sealing valve (239) is fixedly connected to one side of the movable magnet (238). The movable sealing valve (239) is movably set at the position of the vertical channel (236) and can block one end of the vertical channel (236). The number of movable magnets (238) and movable sealing valves (239) corresponds to the number of vertical channels (236). The first compression spring (2310) is fixedly connected between the outer side of one end of the movable magnet (238) and the inner side of one end of the annular limiting ring (235). The active feeding assembly (24) includes an outer annular shell (241), an arc-shaped edge-receiving shell (242), a cross blade (243), an inner annular tube (244), a rigid connecting tube (2441), a trident blade (245), and a spike (246). The bottom outer side of the outer annular shell (241) is fixedly connected to the top outer side of the movable inner tube (234), and the arc-shaped edge-receiving shell (242) is fixedly connected to the top outer side of the outer annular shell (241). The cross blade (243) is fixedly connected to the inner wall of one end of the outer annular shell (241). 3) One end of the cross blade (243) is fixedly connected to the inner annular tube (244), the bottom outer side of the inner annular tube (244) is fixedly connected to the rigid connecting tube (2441), the inner side of the rigid connecting tube (2441) is provided with a filter screen, the bottom end of the rigid connecting tube (2441) is fixedly connected to one end of the annular channel (237), the inner wall surface of one end of the inner annular tube (244) is fixedly connected to the trident blade (245), and the outer side of one end of the trident blade (245) is fixedly connected to the rod-shaped spike (246).

2. The desulfurization equipment for adding pure sodium bicarbonate at the outlet of a high-temperature blower in a cement kiln according to claim 1, characterized in that: The active feeding assembly (24) further includes a blocking rod (247), an arc-shaped head limiting block (248), a second compression spring (249), and a third compression spring (2491). The blocking rod (247) is slidably disposed on the inner side of one end of the outer annular shell (241) and protrudes from the outer side of the arc-shaped edge shell (242). The protruding length of the blocking rod (247) is higher than the top position of the spike (246). The arc-shaped head limiting block (248) is slidably connected to the inner side of the bottom end of the blocking rod (247). The two arc-shaped head limiting blocks (248) are fixedly connected to each other by the second compression spring (249). The third compression spring (2491) is fixedly connected between the outer side of the bottom end of the blocking rod (247) and the inner side of the bottom end of the outer annular shell (241).

3. The desulfurization equipment for adding pure sodium bicarbonate at the outlet of a high-temperature blower in a cement kiln according to claim 2, characterized in that: The crushing mechanism (3) includes a crushing shell (31), an inner support bracket (32), an inner conical grinding part (33), a plate-shaped bracket (34), a circular plate bracket (35), a drive motor (36), a conical grinding part (37), a shallow groove spiral thread (38), and a flat bearing (39). The outer top of the crushing shell (31) is fixedly connected to the outer side of the bottom end of the contraction pipe (213). The inner support bracket (32) is fixedly connected to the inner wall of one end of the crushing shell (31). The inner conical grinding part (33) is fixedly connected to one end of the inner support bracket (32). The plate-shaped bracket is fixedly connected to the inner wall of the bottom end of the crushing shell (31). 34), one end of the plate-shaped bracket (34) is fixedly connected to the circular plate bracket (35), the inner side of the central position of one end of the circular plate bracket (35) is fixedly connected to the drive motor (36), the end of the main shaft of the drive motor (36) is fixedly connected to the conical grinding part (37), the gap between the conical grinding part (37) and the inner conical grinding part (33) gradually decreases from top to bottom, the conical surface of the conical grinding part (37) is provided with the shallow groove thread (38) with the thread direction continuously downward, and the planar bearing (39) is fixedly connected between the outer side of the bottom end of the conical grinding part (37) and the outer side of the top end of the circular plate bracket (35).

4. A method for desulfurization by adding pure sodium bicarbonate to the outlet of a high-temperature blower in a cement kiln, characterized in that: The sulfur dioxide is treated using the desulfurization equipment for adding pure sodium bicarbonate at the outlet of the high-temperature blower of the cement kiln as described in any one of claims 1-3; Pure sodium bicarbonate was used as the desulfurizing agent; A quantitative model for desulfurizing agents is used to calculate the dosage of sodium bicarbonate. This model quantitatively adjusts the dosage of desulfurizing agents based on the rising rate and concentration of sulfur dioxide in the kiln tail flue gas. The desulfurizing agent is automatically and quantitatively administered through a desulfurization device that adds pure sodium bicarbonate at the outlet of the cement kiln high-temperature fan until the rising trend of sulfur dioxide stops. Once the sulfur dioxide reaches the national upper limit for allowable emissions, the added sodium bicarbonate operates at a stable level.

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