A dry desulfurization device with high desulfurization efficiency

Abstract

This invention discloses a high-efficiency dry desulfurization equipment, including a horizontal desulfurization tower, a rotary partitioning mechanism, a powder spraying mechanism, and a negative pressure extraction mechanism. The horizontal desulfurization tower is a circular barrel with a feed pipe connected to its outer circumference. A negative pressure extraction mechanism is installed on the side of the horizontal desulfurization tower. The rotary partitioning mechanism is installed inside the horizontal desulfurization tower to divide it into multiple sections. A powder spraying mechanism is installed in each section to ensure uniform mixing of lime powder and flue gas, thereby increasing the adsorption efficiency of sulfides in the flue gas, increasing the contact time between lime powder and flue gas, and achieving quantitative treatment.

Description

Technical Field

[0001] This invention relates to the field of ammonia synthesis processing equipment, and more specifically to a dry desulfurization equipment with high desulfurization efficiency. Background Technology

[0002] The flue gas from coal combustion contains a large amount of sulfides. During ammonia synthesis, these sulfides need to be removed. Since dry desulfurization is more environmentally friendly, it is currently the most common method for flue gas desulfurization in China. Current desulfurization methods primarily involve passing the flue gas through the bottom of a desulfurization tower, and then blowing quicklime powder into the top of the tower under pressure. The quicklime powder generates calcium oxide at high temperatures, which reacts with sulfides to form solid calcium sulfate, thus achieving flue gas desulfurization. Another method involves spraying lime downwards to directly flush the flue gas, allowing the lime powder to contact and mix with the flue gas, thus absorbing the sulfides. However, this method only flushes the gas, failing to achieve uniform mixing of the lime and flue gas. This results in flue gas requiring further desulfurization treatment based on sulfur content. When the sulfur content is high, the reflux needs to be further processed, reducing efficiency. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this invention discloses a dry desulfurization device with high desulfurization efficiency, which facilitates uniform mixing of lime powder and flue gas, resulting in higher adsorption efficiency of sulfides in the flue gas, increasing the contact time between lime powder and flue gas, and achieving quantitative treatment.

[0004] To achieve the above objectives, the present invention provides a high-efficiency dry desulfurization equipment, comprising a horizontal desulfurization tower, a rotary partitioning mechanism, a powder spraying mechanism, and a negative pressure extraction mechanism. The horizontal desulfurization tower is a circular barrel with a feed pipe connected to its outer circumference. A negative pressure extraction mechanism is installed on the side of the horizontal desulfurization tower. A rotary partitioning mechanism is installed inside the horizontal desulfurization tower to divide it into multiple sections. A powder spraying mechanism is installed in each section to spray lime powder onto the flue gas within that section, thus achieving equal-section spraying. The rotary partitioning mechanism includes partitioning blades and a rotating frame. A circular rotary partition is installed inside the horizontal desulfurization tower. The rotating frame is mounted on the outer walls of the horizontal desulfurization tower via bearings at both ends. The rotating frame is a cylindrical body with multiple dividing blades arranged in a circular array on its outer wall. The other end of each dividing blade contacts the inner wall of the horizontal desulfurization tower, thus dividing the tower into multiple sections. This allows for sectioning during continuous desulfurization, facilitating the quantitative mixing of flue gas and lime powder. An online flue gas monitoring instrument is installed on the outer wall of the horizontal desulfurization tower, and multiple powder spraying mechanisms are installed on the outer wall of the rotating frame. Each section has a corresponding powder spraying mechanism. The online flue gas monitoring instrument is connected to a controller, which in turn is connected to the powder spraying mechanism.

[0005] Preferably, a stirring assembly is provided in each section and the stirring assembly is mounted on a rotating frame. The stirring assembly is a rotating rod with stirring blades installed on it. The rotating rod is mounted on the rotating frame via bearings, passes through the rotating frame and extends into it. A gear is installed on the end of the rotating rod that extends into the rotating frame, and a gear ring that meshes with the gear is installed inside the rotating frame and does not move. The powder spraying mechanism includes a powder discharge hole and a pneumatic conveying assembly. The rotating rod is a hollow rod with multiple powder discharge holes on the outer wall of the end of the rotating rod that extends into the section. A powder supply pipe is connected to one end of the rotating rod, and a pneumatic conveying assembly is connected to the outer wall of the rotating rod. The pneumatic conveying assembly conveys the powder inside the rotating rod into the section.

[0006] Preferably, the powder supply pipe is a pipe that extends into the center of the rotating frame. The rotating frame is coaxial with the powder supply pipe. An annular notch is opened on the outer wall of the powder supply pipe. The ends of multiple rotating rods are connected to the same collar through bearings, and the collar is fitted into the notch of the powder supply pipe. At the same time, the collar and the powder supply pipe are connected through a sealed bearing.

[0007] Preferably, a slowing component is provided between the rotating frame and the horizontal desulfurization tower to slow down the rotation of the rotating frame. The slowing component includes ratchet grooves and pawls. Rattle grooves are installed in a circular array on the inner walls of both ends of the rotating frame. Pawls are installed on the inner wall of the horizontal desulfurization tower by rotational connection, and the ratchet grooves cooperate with the pawls. An elastic telescopic component is hinged to the end of the pawls. A slider is hinged to the other end of the elastic telescopic component. A sliding groove is opened on the outer wall of the side of the horizontal desulfurization tower, and a slider is embedded in the sliding groove. A cylinder is provided between the slider and the side of the horizontal desulfurization tower.

[0008] Preferably, the negative pressure extraction mechanism includes a negative pressure box and an exhaust pipe. The negative pressure box is installed on the side of the horizontal desulfurization tower, and the side of the negative pressure box is connected to the inside of the horizontal desulfurization tower. An exhaust pipe is connected to the top of the negative pressure box, and the other end of the exhaust pipe is connected to a negative pressure fan. A powder removal assembly is installed inside the negative pressure box. The powder removal assembly includes a collection pipe and a moving filter belt. The collection pipe is installed at the bottom of the negative pressure box, and a moving filter belt is installed at the inlet of the exhaust pipe. The moving filter belt consists of multiple motor-driven rollers. The rollers are mounted on the inner wall of the negative pressure box through bearings and are driven by a motor. A strip-shaped filter screen is fitted on the rollers, and the bottom of the filter screen is reached by the rollers. A backflushing nozzle is installed above the filter screen and is located on one side of the exhaust pipe.

[0009] Compared with the prior art, the advantages of the present invention are: it achieves uniform mixing of lime powder and flue gas, which results in higher adsorption efficiency of sulfides in the flue gas, increases the contact time between lime powder and flue gas, and enables quantitative treatment. Attached Figure Description

[0010] Figure 1 This is the front view of the present invention.

[0011] Figure 2 This is a cross-sectional view of the present invention.

[0012] Figure 3 This is a schematic diagram of the stirring assembly of the present invention.

[0013] Figure 4 This is a schematic diagram of the slowing component of the present invention.

[0014] Figure 5 This is a cross-sectional view of the negative pressure extraction mechanism of the present invention.

[0015] The components are as follows: 1. Horizontal desulfurization tower; 2. Feed pipe; 3. Rotary partitioning mechanism; 4. Interval; 5. Partitioning blade; 6. Rotating frame; 7. Agitator assembly; 8. Rotating rod; 9. Agitator blade; 10. Gear; 11. Gear ring; 12. Powder spraying mechanism; 13. Powder discharge hole; 14. Pneumatic conveying assembly; 15. Powder supply pipe; 16. Notch; 17. Collar; 18. Negative pressure extraction mechanism; 19. Negative pressure box; 20. Exhaust pipe; 21. Negative pressure fan; 22. Powder removal assembly; 23. Collection pipe; 24. Moving filter belt; 25. Backflush nozzle; 26. Flue gas online monitoring instrument; 27. Controller; 28. Deceleration assembly; 29. ​​Ratchet; 30. Pawl; 31. Elastic telescopic assembly; 32. Slider; 33. Slide groove. Implementation

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] like Figure 1-5As shown, a high-efficiency dry desulfurization equipment includes a horizontal desulfurization tower 1, a rotary partitioning mechanism 3, a powder spraying mechanism 12, and a negative pressure extraction mechanism 18. The horizontal desulfurization tower 1 is a circular horizontal barrel. A feed pipe 2 is connected to the outer circumference of the horizontal desulfurization tower 1 (the feed pipe 2 is connected to the horizontal desulfurization tower 1). The negative pressure extraction mechanism 18 is fixed to the side of the horizontal desulfurization tower 1 by bolts and is connected to the interior of the horizontal desulfurization tower 1. The rotary partitioning mechanism 3 is installed inside the horizontal desulfurization tower 1 via bearings. The rotary partitioning mechanism 3 divides the horizontal desulfurization tower into multiple independent sections 4 (so that flue gas passes through these sections). The system is divided into four sections (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 ... On both sides of the outer wall of the desulfurization tower 1, a rotating frame 6 rotates inside the horizontal desulfurization tower 1. The rotating frame 6 is a cylindrical body. Multiple dividing blades 5 are fixed to the outer wall of the rotating frame 6 by bolts. The multiple dividing blades 5 are distributed in a ring array on the outer wall of the rotating frame 6. The other end of the dividing blades 5 contacts the inner wall of the horizontal desulfurization tower 1. The dividing blades 5 divide the tower into multiple sections 4. In continuous desulfurization, the sections 4 are divided, which facilitates the quantitative mixing ratio of flue gas and lime powder. A flue gas online monitoring instrument 26 is installed on the outer wall of the horizontal desulfurization tower 1 (a through hole is opened on the outer circumference of the horizontal desulfurization tower 1, and the flue gas online monitoring instrument is inserted into the through hole through a threaded connector). The detection head of 26, the flue gas online monitoring instrument 26 is the RJ-SO3 online analyzer, which detects the sulfur content in each interval 4 in sequence. Multiple powder spraying mechanisms 12 are installed on the outer wall of the rotating frame 6, and a corresponding powder spraying mechanism 12 is set in each interval 4. The flue gas online monitoring instrument 26 is connected to the controller 27, and the controller 27 is connected to the powder spraying mechanism 12. When the flue gas online monitoring instrument 26 detects that the sulfur content in the interval 4 does not meet the standard, the controller 27 controls the powder spraying mechanism 12 to continue spraying lime powder into the interval 4 through the wireless module (i.e., Bluetooth), thus desulfurizing again and reducing the sulfur content in the flue gas.

[0018] A stirring assembly 7 is installed in each interval 4 and mounted on a rotating frame 6. The stirring assembly 7 is a rotating rod 8. Stirring blades 9 are installed on the rotating rod 8 by bolts. The rotating rod 8 is mounted on the rotating frame 6 by bearings, thus enabling the rotation of the rotating rod 8. The rotating rod 8 passes through the rotating frame 6 and extends into the inner side of the rotating frame 6. A gear 10 is fixed to the end of the rotating rod 8 that extends into the rotating frame 6 by welding. A gear ring 11 that meshes with the gear 10 is installed inside the rotating frame 6 and does not move. The gear 10 is installed on the inner wall of the horizontal desulfurization tower 1 by bolts. The powder spraying mechanism 12 includes a powder discharge hole 13 and a pneumatic conveying assembly 14. The rotating rod 8 is a hollow rod. The outer wall of the end of the rotating rod 8 that extends into the interval 4 is... Multiple fine powder discharge holes 13 are opened on the top of the rotating rod 8. A powder supply pipe 15 is connected to one end of the rotating rod 8 (the powder supply pipe 15 is a straight pipe that passes through the horizontal desulfurization tower 1 and is connected to the rotating rod 8. Lime powder enters the rotating rod 8 through the powder supply pipe 15). A pneumatic conveying assembly 14 is connected to the outer wall of the rotating rod 8 (the pneumatic conveying assembly 14 is a high-pressure air pump (the high-pressure air pump is wirelessly connected to the controller via a Bluetooth module. There are air holes on the side of the horizontal desulfurization tower that are connected to the inside of the rotating frame to supply air to the high-pressure air pump). The pipe of the high-pressure air pump is connected to the rotating rod 8. The powder is sprayed into the interval 4 for desulfurization through the high-pressure air pump). The powder in the rotating rod 8 is conveyed into the interval 4 through the pneumatic conveying assembly 14.

[0019] The powder supply pipe 15 is the pipe that extends into the center of the rotating frame 6. The powder supply pipe 15 is welded to the horizontal desulfurization tower 1. The rotating frame 6 is coaxial with the powder supply pipe 15. An annular notch 16 is opened on the outer wall of the powder supply pipe 15. The ends of multiple rotating rods 8 are connected to the same collar 17 by bearings, and the collar 17 is fitted into the notch 16 of the powder supply pipe 15. This enables the rotating rods 8 to communicate with the powder supply pipe 15. At the same time, the collar 17 is connected to the powder supply pipe 15 by a sealed bearing. In this way, the multiple rotating rods 8 rotate around the powder supply pipe 15.

[0020] A deceleration assembly 28 is provided between the rotating frame 6 and the horizontal desulfurization tower 1 to slow down the rotation of the rotating frame 6. The deceleration assembly 28 includes ratchet grooves 29 and pawls 30. Rattle grooves 29 are installed in a circular array on the inner walls of both ends of the rotating frame 6. Pawls 30 are installed on the inner wall of the horizontal desulfurization tower 1 by rotational connection, and the ratchet grooves 29 and pawls 30 are matched. The pawls 30 limit the circumferential force required for the rotation of the rotating frame 6. An elastic telescopic assembly 31 (the elastic telescopic assembly 31 is a spring sleeved on a telescopic rod) is hinged to the end of the pawl 30. A slider 32 is hinged to the other end of the elastic telescopic assembly 31. A sliding groove 33 is opened on the outer side wall of the horizontal desulfurization tower 1, and a slider 32 is embedded in the sliding groove 33. A cylinder is installed between the slider 32 and the side of the horizontal desulfurization tower 1 by bolt fastening. The position of the slider 32 is adjusted by the extension and retraction of the cylinder, which in turn adjusts the rebound pressure of the pawl 30. When the rotating frame 6 rotates, the ratchet groove 29 presses the pawl 30 in the middle, so that the rotating frame 6 can rotate. Adjusting the pressure of the pawl 30 can adjust the circumferential force required for the rotating frame 6 to rotate (i.e., the pressure of the flue gas), which can prevent the rotating frame 6 from rotating too fast and shortening the desulfurization time, thereby improving the desulfurization efficiency.

[0021] The negative pressure extraction mechanism 18 includes a negative pressure box 19 and an exhaust pipe 20. The negative pressure box 19 is installed on the side of the horizontal desulfurization tower 1 by bolts. The side of the negative pressure box 19 is connected to the interior of the horizontal desulfurization tower 1. The exhaust pipe 20 is fixed to the top of the negative pressure box 19 by bolts, and the other end of the exhaust pipe 20 is connected to a negative pressure fan 21 via a flange. The negative pressure fan 21 extracts the desulfurized flue gas. A powder removal assembly 22 is installed inside the negative pressure box 19. The powder removal assembly 22 includes a collection pipe 23 and a moving filter belt 24. The collection pipe is installed at the bottom of the negative pressure box 19 by bolts. 23. A movable filter belt 24 is installed at the inlet of the exhaust pipe 20. The movable filter belt 24 consists of multiple rollers driven by a motor. The rollers are mounted on the inner wall of the negative pressure box 19 through bearings. The rollers are driven by a motor. A strip-shaped filter screen is fitted on the rollers. The bottom of the filter screen is reached by the rollers. A backflush nozzle 25 is installed above the filter screen and is located on one side of the exhaust pipe 20 (multiple backflush nozzles are installed on the same pipe through threaded joints. The pipe is connected to an air pump to spray air. The backflush nozzles are located above the filter screen. The backflush blows the dust away from the filter screen to prevent excessive powder from clogging the filter screen and affecting ventilation).

Claims

1. A dry desulfurization equipment with high desulfurization efficiency, comprising a horizontal desulfurization tower, a rotary partitioning mechanism, a powder spraying mechanism, and a negative pressure extraction mechanism, wherein the horizontal desulfurization tower is a circular barrel, a feed pipe is connected to the outer circumference of the horizontal desulfurization tower, and a negative pressure extraction mechanism is provided on the side of the horizontal desulfurization tower, characterized in that, A rotating partitioning mechanism is installed inside the horizontal desulfurization tower to divide the tower into multiple sections. Each section is equipped with a powder spraying mechanism to spray lime powder into the section. The rotating partitioning mechanism includes partition blades and a rotating frame. A circular rotating frame is installed inside the horizontal desulfurization tower, with its two ends mounted on the outer walls of the tower via bearings. Multiple partition blades are installed on the outer walls of the rotating frame in a circular array. The other end of each partition blade is connected to... The inner wall of the horizontal desulfurization tower is divided into multiple sections by partition blades. This allows for sectioning during continuous desulfurization, facilitating the quantitative mixing of flue gas and lime powder. An online flue gas monitor is installed on the outer wall of the horizontal desulfurization tower, and multiple powder spraying mechanisms are installed on the outer wall of the rotating frame. Each section has a corresponding powder spraying mechanism. The online flue gas monitor is connected to a controller, which in turn is connected to the powder spraying mechanism. A stirring assembly, which is essentially a rotating rod, is installed in each section and mounted on the rotating frame. Equipped with stirring blades, the rotating rod is mounted on a rotating frame via bearings. The rotating rod passes through the rotating frame and extends into it. A gear is installed on the end of the rotating rod that extends into the rotating frame, and a gear ring meshes with the gear inside the rotating frame, ensuring the gear ring does not move. The powder spraying mechanism includes a powder discharge port and a pneumatic conveying assembly. The rotating rod is hollow, with multiple powder discharge ports on the outer wall of the end of the rotating rod that extends into the zone. A powder supply pipe is connected to one end of the rotating rod, and a pneumatic conveying assembly is connected to the outer wall of the rotating rod. The pneumatic conveying assembly dispenses the powder from inside the rotating rod into the zone. The rotating frame is connected to the horizontal desulfurization tower via an internal conveying system. A slowing component is installed between the rotating frame and the horizontal desulfurization tower to slow down the rotation of the rotating frame. The slowing component includes ratchet grooves and pawls. A ratchet groove is installed in a circular array on the inner wall of both ends of the rotating frame. A pawl is installed on the inner wall of the horizontal desulfurization tower by rotational connection, and the ratchet grooves cooperate with the pawls. An elastic telescopic component is hinged to the end of the pawl, and a slider is hinged to the other end of the elastic telescopic component. A sliding groove is opened on the outer wall of the side of the horizontal desulfurization tower, and a slider is embedded in the sliding groove. A cylinder is installed between the slider and the side of the horizontal desulfurization tower.

2. The dry desulfurization apparatus of claim 1, wherein The powder supply pipe is the pipe that extends into the center of the rotating frame. The rotating frame is coaxial with the powder supply pipe. There is an annular notch on the outer wall of the powder supply pipe. The ends of multiple rotating rods are mounted on the same collar through bearings, and the collar is fitted into the notch of the powder supply pipe. At the same time, the collar and the powder supply pipe are connected through a sealed bearing.

3. The dry desulfurization equipment with high desulfurization efficiency according to claim 2, characterized in that, The negative pressure extraction mechanism includes a negative pressure box and an exhaust pipe. The negative pressure box is installed on the side of the horizontal desulfurization tower, and the side of the negative pressure box is connected to the inside of the horizontal desulfurization tower. An exhaust pipe is connected to the top of the negative pressure box, and the other end of the exhaust pipe is connected to a negative pressure fan. A powder removal assembly is installed inside the negative pressure box. The powder removal assembly includes a collection pipe and a moving filter belt. The collection pipe is installed at the bottom of the negative pressure box, and the moving filter belt is installed at the inlet of the exhaust pipe. The moving filter belt is installed on multiple motor-driven rollers. The rollers are mounted on the inner wall of the negative pressure box through bearings and are driven by motors. A strip-shaped filter screen is fitted on the rollers, and the movement of the filter screen is achieved by the rollers. A backflushing nozzle is installed above the filter screen and is located on one side of the exhaust pipe.

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