A dry desulfurization treatment device for pulverized coal

Abstract

This utility model relates to the field of desulfurization technology, specifically a dry desulfurization treatment device for pulverized coal, including a desulfurization tower. The desulfurization tower has an air inlet at its bottom and an air outlet at its top. An adsorption box is detachably installed inside the desulfurization tower. A stirring mechanism is installed inside the adsorption box to stir the desulfurizing agent within the adsorption box. The stirring mechanism includes a stirring shaft rotatably mounted on the adsorption box and a stirring element arranged radially along the stirring shaft. An angle adjustment element is disposed inside the stirring shaft and connected to the stirring element. The raising and lowering of the angle adjustment element is driven by a speed control element installed in the desulfurization tower. This utility model can adjust the tilt angle of the stirring element by controlling the amount of flue gas supplied to the desulfurization tower, effectively reducing the stirring load while enhancing the stirring intensity of the desulfurizing agent, thus improving desulfurization efficiency to a certain extent and reducing the problem of desulfurizing agent caking.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization technology, specifically a dry desulfurization device for pulverized coal. Background Technology

[0002] Before pulverized coal combustion, sulfur needs to be removed from the coal fuel, and desulfurization is also required before flue gas emissions. Generally, there are three desulfurization methods: pre-combustion, during combustion, and post-combustion, to reduce sulfur dioxide emissions. Specific desulfurization methods can be broadly categorized as wet and dry methods. The difference between dry and wet desulfurization lies in the different wet and dry states of the absorbent and desulfurization products during the desulfurization process. Dry desulfurization is widely used because it eliminates the advantage of wastewater and waste acid discharge, resulting in less corrosion of combustion equipment.

[0003] Existing dry desulfurization processes are simple, typically located at the end of the gas purification process. Desulfurization mainly employs the iron oxide method, with iron oxide as the primary component, primarily derived from artificial sources. Artificial iron oxide generally comes from metal scraps from machine tool cutting processes, processed into iron filings with a particle diameter of 0.6–2.4 mm. These are then mixed with sawdust in a 1:1 weight ratio, sprinkled with water, and thoroughly dried to oxidize, producing hydrated iron oxide. A ratio of ferric oxide to hydrated iron oxide greater than 1.5 indicates successful oxidation. Adding a certain amount of quicklime creates the desulfurizing agent. However, the SO2 in the flue gas reacts with the desulfurizing agent to produce water. If excessive moisture accumulates, the desulfurizing agent particles will clump together, leading to caking and reduced reactivity between the desulfurizing agent and SO2, resulting in a significant decrease in desulfurization efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a dry desulfurization device for pulverized coal to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A dry desulfurization treatment device for pulverized coal includes a desulfurization tower, wherein an air inlet and an air outlet are respectively provided at the bottom and top of the desulfurization tower, and an adsorption box is detachably installed inside the desulfurization tower.

[0007] The adsorption box is equipped with a stirring mechanism for stirring the desulfurizing agent inside the adsorption box. The stirring mechanism includes a stirring shaft rotatably mounted on the adsorption box and a stirring component arranged radially along the stirring shaft.

[0008] An angle adjustment component is disposed inside the stirring shaft and connected to the stirring component to change the tilt angle of the stirring component. The lifting and lowering of the angle adjustment component is driven by a speed control component installed in the desulfurization tower.

[0009] The dry desulfurization device for pulverized coal as described above: a cavity is formed inside the adsorption box, and multiple micro-holes communicating with the cavity and allowing flue gas to pass through are distributed at both ends of the adsorption box.

[0010] The coal powder dry desulfurization treatment device described above: the stirring component includes a deflection shaft rotatably mounted on the stirring shaft, stirring blades are arranged radially on the deflection shaft, and one end of the deflection shaft extending into the stirring shaft is connected to the angle adjustment component.

[0011] The pulverized coal dry desulfurization treatment device described above: the angle adjustment component includes a lifting rod, the lifting rod is arranged along the axial direction of the stirring shaft, and a rotating drum is rotatably installed on one end of the lifting rod that extends into the stirring shaft. A pull rod is installed on the rotating drum, and the end of the pull rod away from the rotating drum is hinged to the deflection shaft.

[0012] The dry desulfurization treatment device for pulverized coal as described above: the speed control component includes a drive shaft rotatably installed inside the desulfurization tower, the rotation of the drive shaft is driven by a pump installed on the desulfurization tower, and the drive shaft is connected to the stirring shaft through a gear set;

[0013] The drive shaft is equipped with a centrifugal transmission component that can be connected to the lifting rod.

[0014] The dry desulfurization device for pulverized coal as described above: the centrifugal transmission component includes a turntable, the turntable is arranged along the axial direction of the drive shaft, and a plurality of sliding grooves are distributed along the radial direction of the turntable. A slider is slidably arranged in the sliding groove, and a connecting rod is hinged to the slider.

[0015] A connecting cylinder is arranged along the axial direction of the drive shaft and is fixed to the lifting rod by a second connecting hoop. The lifting and lowering of the connecting cylinder is restricted by a guide assembly installed inside the desulfurization tower.

[0016] A sleeve is rotatably mounted on the connecting cylinder, and a plurality of extension blocks are arranged radially on the sleeve. The end of the connecting rod away from the slider is hinged to the extension block.

[0017] A spring is sleeved on the drive shaft, with one end of the spring abutting against the connecting cylinder and the other end abutting against a ring formed along the axial direction of the drive shaft.

[0018] The pulverized coal dry desulfurization treatment device described above: the guiding assembly includes a guide rod installed inside the desulfurization tower and parallel to the axis of the drive shaft, a first connecting hoop slidably disposed on the guide rod, and the end of the first connecting hoop away from the guide rod being fixed to the connecting cylinder.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] Flue gas is fed into the desulfurization tower through the inlet. While reacting with sulfur dioxide in the flue gas, the stirring mechanism stirs the desulfurizing agent in the adsorption box. The stirring component mechanically disperses the water-containing desulfurizing agent particles, breaks the adsorption layer of water molecules on the surface of the desulfurizing agent, prevents particles from sticking together and forming hard lumps, and avoids caking failure. According to the amount of flue gas conveyed into the desulfurization tower, the angle adjustment component can adjust the tilt angle of the stirring component, effectively reducing the stirring load while enhancing the stirring intensity of the desulfurizing agent, improving the desulfurization efficiency to a certain extent, and thus reducing the caking problem of the desulfurizing agent. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a dry desulfurization treatment device for pulverized coal.

[0022] Figure 2 This is a schematic diagram of the internal structure of the desulfurization tower in a dry coal desulfurization treatment device.

[0023] Figure 3 This is a schematic diagram of the speed control component in a dry coal desulfurization treatment device.

[0024] Figure 4 This is a schematic diagram of the centrifugal transmission components in a dry coal desulfurization treatment device.

[0025] Figure 5 This is a schematic diagram of the lifting rod and agitator in a dry coal desulfurization treatment device.

[0026] Figure 6 This is a schematic diagram of the adsorption box and stirring mechanism in a dry coal desulfurization treatment device.

[0027] In the diagram: 1. Desulfurization tower; 101. Inlet; 102. Outlet; 2. Agitator shaft; 3. Pump; 4. Adsorption box; 5. Drive shaft; 6. Guide rod; 7. Turntable; 701. Slide groove; 8. Slider; 9. Connecting rod; 10. Connecting cylinder; 11. Sleeve; 1101. Extension block; 12. First connecting clamp; 13. Second connecting clamp; 14. Gear set; 15. Deflection shaft; 1501. Agitator blade; 16. Lifting rod; 17. Rotary cylinder; 18. Tie rod; 19. Spring. Detailed Implementation

[0028] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0030] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail, in order to highlight the main points of this application.

[0031] Please see Figures 1-6 In this embodiment of the utility model, a dry desulfurization treatment device for pulverized coal includes a desulfurization tower 1. The bottom and top of the desulfurization tower 1 are respectively provided with an air inlet 101 and an air outlet 102. An adsorption box 4 is detachably installed inside the desulfurization tower 1.

[0032] The adsorption box 4 is provided with a stirring mechanism for stirring the desulfurizing agent in the adsorption box 4. The stirring mechanism includes a stirring shaft 2 rotatably mounted on the adsorption box 4 and a stirring component arranged radially along the stirring shaft 2.

[0033] An angle adjustment component is disposed inside the stirring shaft 2 and connected to the stirring component to change the tilt angle of the stirring component. The lifting and lowering of the angle adjustment component is driven by a speed control component installed in the desulfurization tower 1.

[0034] In this embodiment, flue gas is fed into the desulfurization tower 1 through the inlet 101, where it reacts with sulfur dioxide in the flue gas. Simultaneously, the stirring mechanism stirs the desulfurizing agent in the adsorption box 4. The stirring element mechanically disperses the water-containing desulfurizing agent particles, breaks the adsorption layer of water molecules on the surface of the desulfurizing agent, prevents the particles from sticking together and forming hard lumps, and avoids caking failure. According to the amount of flue gas conveyed into the desulfurization tower 1, the angle adjustment element can adjust the tilt angle of the stirring element, effectively reducing the stirring load while enhancing the stirring intensity of the desulfurizing agent, improving the desulfurization efficiency to a certain extent, and thus reducing the caking problem of the desulfurizing agent.

[0035] Preferably, the adsorption box 4 has a cavity, and multiple micro-holes communicating with the cavity and allowing flue gas to pass through are distributed at both ends of the adsorption box 4.

[0036] In one embodiment, the iron oxide in the desulfurizing agent gradually loses its activity due to the accumulation of reaction products after a period of use, resulting in a decrease in desulfurization efficiency. Therefore, in order to ensure the effective removal of sulfur dioxide during the desulfurization process, the desulfurizing agent in the adsorption box 4 needs to be replaced periodically.

[0037] For further solutions to this utility model, please refer to [link / reference]. Figure 5 and Figure 6 The stirring component includes a deflection shaft 15 rotatably mounted on the stirring shaft 2. The deflection shaft 15 is provided with stirring blades 1501 in the radial direction, and one end of the deflection shaft 15 extending into the stirring shaft 2 is connected to the angle adjustment component.

[0038] As a further embodiment of this utility model, the angle adjustment component includes a lifting rod 16, which is arranged along the axial direction of the stirring shaft 2. A rotating drum 17 is rotatably mounted on one end of the lifting rod 16 that extends into the stirring shaft 2. A pull rod 18 is mounted on the rotating drum 17, and the end of the pull rod 18 away from the rotating drum 17 is hinged to the deflection shaft 15.

[0039] The speed control component includes a drive shaft 5 rotatably installed inside the desulfurization tower 1. The rotation of the drive shaft 5 is driven by a pump 3 installed on the desulfurization tower 1, and the drive shaft 5 is connected to the stirring shaft 2 through a gear set 14.

[0040] The drive shaft 5 is equipped with a centrifugal transmission component that can be connected to the lifting rod 16.

[0041] It should be noted that the flue gas at the inlet 101 of the desulfurization tower 1 is transported by a pumping mechanism. The flue gas rises towards the outlet 102 of the desulfurization tower 1 due to its own density. During the rising process, it enters the adsorption box 4 through the micro-holes on the adsorption box 4 and reacts with the desulfurizing agent. After the sulfur dioxide in the flue gas is removed, it is discharged to the designated location from the outlet 102.

[0042] When pump 3 starts working, the output shaft of pump 3 is fixedly connected to drive shaft 5, so that when the output shaft rotates, it can drive drive shaft 5 to rotate synchronously. Under the transmission of gear set 14, stirring shaft 2 can rotate accordingly, so that stirring blade 1501 can stir the desulfurizing agent in adsorption box 4. On the one hand, the unreacted desulfurizing agent in the upper layer can settle to the lower layer and react with flue gas, effectively improving the contact between desulfurizing agent and sulfur dioxide in flue gas. On the other hand, it can avoid the desulfurizing agent from reacting with sulfur dioxide to produce water and causing desulfurizing agent to caking.

[0043] It should be noted that when the stirring blade 1501 is parallel to the axis of the stirring shaft 2, the stirring efficiency of the stirring blade 1501 on the desulfurizing agent is at its maximum, but the resistance experienced by the stirring blade 1501 is also at its maximum. The larger the tilt angle, the lower the stirring efficiency. By adjusting the amount of flue gas conveyed into the desulfurization tower 1, the stirring rate of the stirring blade 1501 on the desulfurizing agent can be adjusted, effectively relieving the load on the pump 3 while ensuring that the flue gas can fully contact the desulfurizing agent.

[0044] For further solutions to this utility model, please refer to [link / reference]. Figure 3 and Figure 4The centrifugal transmission component includes:

[0045] Turntable 7 is arranged along the axial direction of the drive shaft 5, and a plurality of sliding grooves 701 are distributed radially along the turntable 7. A slider 8 is slidably arranged in the sliding groove 701, and a connecting rod 9 is hinged to the slider 8.

[0046] The connecting cylinder 10 is arranged along the axial direction of the drive shaft 5 and is fixed to the lifting rod 16 by the second connecting clamp 13. The lifting of the connecting cylinder 10 is restricted by the guide assembly installed in the desulfurization tower 1.

[0047] A sleeve 11 is rotatably mounted on the connecting cylinder 10. Multiple extension blocks 1101 are radially arranged on the sleeve 11. The end of the connecting rod 9 away from the slider 8 is hinged to the extension block 1101.

[0048] Spring 19 is sleeved on the drive shaft 5. One end of spring 19 abuts against the connecting cylinder 10, and the other end abuts against a ring formed along the axial direction of the drive shaft 5.

[0049] In detail, when the drive shaft 5 rotates, the slider 8 on its turntable 7 is subjected to centrifugal force, causing multiple sliders 8 to move away from the drive shaft 5 within the slide groove 701. Simultaneously, under the push of the connecting rod 9, the sleeve 11 can move linearly along the axis of the drive shaft 5 and rotate synchronously with the rotation of the drive shaft 5. This allows the connecting cylinder 10 to rise synchronously along the axis of the drive shaft 5. Under the traction of the second connecting hoop 13, when the lifting rod 16 rises along the axis of the stirring shaft 2, the rise of the pull rod 18 causes the deflection shaft 15 to deflect, thereby changing the tilt angle of the stirring blade 1501 and adjusting the stirring rate of the stirring blade 1501 on the desulfurizer. This ensures that the flue gas can always be in full contact with the desulfurizer when the flue gas delivery volume changes.

[0050] For further solutions to this utility model, please refer to [link / reference]. Figure 3 The guiding assembly includes a guide rod 6 installed inside the desulfurization tower 1 and parallel to the axis of the drive shaft 5. A first connecting hoop 12 is slidably disposed on the guide rod 6, and the end of the first connecting hoop 12 away from the guide rod 6 is fixed to the connecting cylinder 10.

[0051] Under the limiting position of the first connecting clamp 12, when the sleeve 11 rotates and rises, the connecting cylinder 10 has and can make linear motion along the axial direction of the drive shaft 5, thereby guiding the rise of the lifting rod 16.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dry desulfurization treatment device for pulverized coal, comprising a desulfurization tower (1), wherein an air inlet (101) and an air outlet (102) are respectively provided at the bottom and top of the desulfurization tower (1), and an adsorption box (4) is detachably installed inside the desulfurization tower (1). Its characteristics are: The adsorption box (4) is provided with a stirring mechanism for stirring the desulfurizing agent in the adsorption box (4). The stirring mechanism includes a stirring shaft (2) rotatably mounted on the adsorption box (4) and a stirring component arranged radially along the stirring shaft (2). An angle adjustment component is disposed inside the stirring shaft (2) and connected to the stirring component to change the tilt angle of the stirring component. The lifting and lowering of the angle adjustment component is driven by a speed control component installed in the desulfurization tower (1).

2. The dry desulfurization device for pulverized coal according to claim 1, characterized in that, The adsorption box (4) has a cavity, and multiple micro-holes that communicate with the cavity and allow flue gas to pass through are distributed at both ends of the adsorption box (4).

3. The dry desulfurization device for pulverized coal according to claim 1, characterized in that, The stirring component includes a deflection shaft (15) rotatably mounted on the stirring shaft (2), with stirring blades (1501) arranged radially on the deflection shaft (15), and one end of the deflection shaft (15) extending into the stirring shaft (2) is connected to the angle adjustment component.

4. The dry desulfurization device for pulverized coal according to claim 3, characterized in that, The angle adjustment component includes a lifting rod (16), which is arranged along the axial direction of the stirring shaft (2). A rotating drum (17) is rotatably mounted on one end of the lifting rod (16) that extends into the stirring shaft (2). A pull rod (18) is mounted on the rotating drum (17), and the end of the pull rod (18) away from the rotating drum (17) is hinged to the deflection shaft (15).

5. The dry desulfurization device for pulverized coal according to claim 4, characterized in that, The speed control device includes a drive shaft (5) rotatably installed inside the desulfurization tower (1). The rotation of the drive shaft (5) is driven by a pump (3) installed on the desulfurization tower (1), and the drive shaft (5) is connected to the stirring shaft (2) through a gear set (14). The drive shaft (5) is provided with a centrifugal transmission component that can be connected to the lifting rod (16).

6. The dry desulfurization device for pulverized coal according to claim 5, characterized in that, The centrifugal transmission component includes a turntable (7), which is arranged along the axial direction of the drive shaft (5). Multiple grooves (701) are distributed radially along the turntable (7). A slider (8) is slidably arranged in the groove (701), and a connecting rod (9) is hinged on the slider (8). The connecting cylinder (10) is arranged along the axial direction of the drive shaft (5) and is fixed to the lifting rod (16) by the second connecting hoop (13). The lifting of the connecting cylinder (10) is restricted by the guide assembly installed in the desulfurization tower (1). A sleeve (11) is rotatably mounted on the connecting cylinder (10). A plurality of extension blocks (1101) are arranged radially on the sleeve (11). The end of the connecting rod (9) away from the slider (8) is hinged to the extension block (1101). A spring (19) is sleeved on the drive shaft (5). One end of the spring (19) abuts against the connecting cylinder (10), and the other end abuts against a ring formed along the axial direction of the drive shaft (5).

7. The dry desulfurization device for pulverized coal according to claim 6, characterized in that, The guiding assembly includes a guide rod (6) installed inside the desulfurization tower (1) and parallel to the axis of the drive shaft (5). A first connecting hoop (12) is slidably disposed on the guide rod (6). The end of the first connecting hoop (12) away from the guide rod (6) is fixed to the connecting cylinder (10).

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