Self-maintaining disengagement nitric acid column

Abstract

The application relates to the technical field of waste gas treatment, in particular to a self-maintenance type de-nitric acid tower which comprises a main tower body, an external liquid conveying pipe used for conveying saturated ammonium sulfate solution, an adjusting motor and a driving motor. The self-maintenance type de-nitric acid tower adopts an automatic maintenance mode to clean and remove slag on the surface of the annular filter screen frame, greatly prolongs the maintenance cycle and reduces the later use cost; the driving motor drives the annular filter screen frame to rotate, so that the crystalline substances on the surface are automatically scraped off, the cleanliness of the surface of the annular filter screen frame is maintained, and the gas conveying reaction efficiency is improved; the whole device can be quickly controlled to be disassembled and separated through the adjusting motor, the difficulty of the later disassembly and separation is reduced, and the operation is simpler and more convenient.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a self-maintaining nitrate separation tower. Background Technology

[0002] A nitric acid removal tower is a device that absorbs nitrogen oxides using water or nitric acid. The tower body is typically made of stainless steel. Commercially available wet desulfurization absorption towers are classified into two types based on the flow direction of the absorption slurry and flue gas: co-current towers and counter-current towers. By arranging several layers of swirl plates inside the desulfurization tower, the saturated ammonium sulfate solution sprayed from the top of the tower is atomized internally, allowing the SO2 in the flue gas to be fully absorbed and reacted with the sprayed saturated ammonium sulfate solution. The cleaned flue gas, after desulfurization and washing, passes through a demister for dehydration and then enters a heat exchanger. Finally, the heated flue gas is discharged into the atmosphere through a chimney by an induced draft fan.

[0003] However, crystals are produced after absorption, requiring regular cleaning of the crystals on the screen surface to maintain internal reaction efficiency. This not only increases the cost of later use but also necessitates shutting down the entire nitric acid removal tower, greatly affecting processing efficiency and making operation inconvenient. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an improved self-maintaining nitric acid stripping tower in order to solve the problems existing in the background art. This solves the problem that the current nitric acid stripping tower requires periodic cleaning of the crystals on the screen surface to maintain the internal reaction efficiency, which not only results in high operating costs, but also requires shutting down the entire nitric acid stripping tower, which greatly affects its processing efficiency and is also very inconvenient to operate.

[0005] The technical solution adopted by this invention to solve its technical problem is: a self-maintaining nitrate-detaching tower, including a main tower body, an external inlet pipe for conveying saturated ammonium sulfate solution, an regulating motor, and a drive motor. An integral lateral assembly ring is fixedly assembled on the inner side of the main tower body. A central support seat is fixedly assembled in the middle of the main tower body through an arc-shaped mounting bracket at the bottom of the lateral assembly ring. An inverted L-shaped top inlet pipe for connecting the external inlet pipe is fixedly connected to the upper center of the central support seat. A flip-type upper scraper and a flip-type top spraying mechanism connected to the top inlet pipe are movably assembled on the outer side of the central support seat. An annular filter frame is movably assembled between the lateral assembly ring and the central support seat. A first lateral assembly seat for installing the regulating motor and a second lateral assembly seat for installing the drive motor are fixedly assembled on the outer side of the main tower body.

[0006] The upper surface of the central support base is provided with multiple upper storage grooves arranged in a ring array. The inner walls on both sides of the upper storage grooves are symmetrically provided with lateral liquid guide holes that are connected to the top liquid inlet pipe. The flip-type top spraying mechanism is movably assembled with the central support base by inserting the side mounting shafts into the lateral liquid guide holes.

[0007] The flip-type top spraying mechanism includes a flip-adjusting tube with mounting shaft tubes on both sides and an atomizing nozzle fixed on the arc-shaped sidewall of the flip-adjusting tube.

[0008] The flip-type upper scraper is inserted into the lateral liquid guide hole through the lateral assembly shafts on both outer walls and is movably assembled with the upper storage groove.

[0009] An annular assembly adjustment groove is formed on the upper surface of the lateral assembly ring near the side wall of the central support. An annular lifting and limiting cover controlled by an adjustment motor is movably assembled inside the annular assembly adjustment groove. Multiple arc-shaped limiting and lifting grooves are formed on the inner arc-shaped surface of the annular assembly adjustment groove. An internally threaded lifting cylinder protrudes into the arc-shaped limiting and lifting groove on the outer surface of the annular lifting and limiting cover. A threaded adjusting longitudinal shaft controlled by an adjustment motor is movably assembled on the bottom surface of the arc-shaped limiting and lifting groove. The upper end of the threaded adjusting longitudinal shaft is inserted into the internally threaded lifting cylinder and threadedly assembled with the internally threaded lifting cylinder. The lower end of the threaded adjusting longitudinal shaft is meshed with the adjustment motor through a transmission gear ring located inside the lateral assembly ring.

[0010] The upper surface of the annular filter frame is provided with an annular transmission tooth groove inside the annular lifting limit cover. The drive motor is driven by the drive gear at the top of the drive shaft meshing with the annular transmission tooth groove.

[0011] The annular lifting and limiting cover has an integrated lateral limiting bracket on its lateral arc-shaped surface for limiting the flip-type upper scraper and the flip-type top spraying mechanism.

[0012] The flip-type upper scraper is an arc-shaped scraper, and a spiral conveying shaft is movably mounted on the inner arc-shaped surface of the flip-type upper scraper. A central hydraulic motor for driving the spiral conveying shaft is fixedly mounted inside the central support seat.

[0013] The annular lifting limit cover has an internal material guiding channel at the corresponding position inside the side wall and the lateral assembly ring. The outer side of the main tower body is fixed with an inverted L-shaped lateral slag discharge pipe connected to the internal material guiding channel. The lower end of the outer side of the main tower body is fixed with a bottom slag collection box connected to the lateral slag discharge pipe.

[0014] Each of the upper storage grooves is equipped with a bottom compression spring for easy elastic reset.

[0015] The beneficial effects of this invention are:

[0016] (1) The self-maintaining nitric acid removal tower of the present invention uses an automatic maintenance method to clean and remove slag from the surface of the annular filter screen, which greatly extends the maintenance cycle and reduces the later use cost.

[0017] (2) The entire annular filter frame is rotated by a drive motor, thereby automatically scraping off the crystals on the surface, maintaining the cleanliness of the annular filter frame surface, and thus improving the gas delivery reaction efficiency.

[0018] (3) The entire device can be quickly controlled to disassemble and separate by adjusting the motor, which reduces the difficulty of disassembly and separation in the later stage and makes the operation simpler and more convenient.

[0019] (4) Hydraulic power is used to drive the spiral conveying shaft located inside the tilting upper scraper to rotate, which can quickly remove solid crystals from the tower while scraping them off. The slag discharge operation is carried out in a low-position operation mode, which greatly enhances safety and convenience.

[0020] (5) The ring assembly adjustment groove is equipped with a ring lifting limit cover controlled by the adjustment motor, which can not only improve the stability of the ring filter screen, the flip-type upper scraper and the flip-type top spraying mechanism, but also improve the safety and durability of the transmission mechanism. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

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

[0023] Figure 2 This is a schematic diagram of the internal structure of the central support base of the present invention.

[0024] Figure 3 This is a longitudinal sectional view of the main tower body in this invention.

[0025] Figure 4 This is an internal cross-sectional view of the flip-type upper scraper in this invention. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Figure 1 , Figure 2 , Figure 3 and Figure 4 The self-maintaining nitric acid separation tower shown includes a main tower body 1, an external inlet pipe 2 for conveying saturated ammonium sulfate solution, an regulating motor 3, and a drive motor 4. An integral lateral assembly ring 5 is fixedly mounted on the inner side of the main tower body 1. A central support seat 7 is fixedly mounted in the middle of the main tower body 1 through an arc-shaped mounting bracket 6 at the bottom of the lateral assembly ring 5. An inverted L-shaped top inlet pipe 8 for connecting the external inlet pipe 2 is fixedly connected to the upper center of the central support seat 7. A flip-type upper scraper 9 and a flip-type top spraying mechanism connected to the top inlet pipe 8 are movably mounted on the outer side of the central support seat 7. An annular filter screen frame 10 is movably mounted between the lateral assembly ring 5 and the central support seat 7. A first lateral assembly seat 11 for mounting the regulating motor 3 and a second lateral assembly seat 12 for mounting the drive motor 4 are fixedly mounted on the outer side of the main tower body 1.

[0029] The regulating motor 3 and the drive motor 4 are existing technologies.

[0030] To facilitate lateral storage and assembly, the upper surface of the central support base 7 has 6 upper storage grooves 13 arranged in a circular array. The inner walls on both sides of the upper storage grooves 13 have symmetrical side liquid guide holes that are connected to the top liquid inlet pipe 8. The flip-type top spraying mechanism is movably assembled with the central support base 7 by inserting the side liquid guide holes through the side mounting shaft tubes 14.

[0031] The flip-type top spraying mechanism can not only flip by inserting the side guide tubes 14 into the side liquid guide holes, but also keep the top liquid inlet pipe 8 connected to the inside of the flip-type top spraying mechanism.

[0032] To facilitate the assembly and spraying of atomized liquid, the flip-top spraying mechanism includes a flip-adjusting tube 15 with assembly shaft tubes 14 on both sides and an atomizing nozzle 16 fixed on the arc-shaped sidewall of the flip-adjusting tube 15.

[0033] To facilitate the movable assembly, the flip-type upper scraper 9 is inserted into the lateral liquid guide hole through the lateral assembly shafts on both outer walls and is movablely assembled with the upper storage groove 13.

[0034] To facilitate lifting and adjustment and thus make subsequent loading and unloading easier, an annular assembly adjustment groove 17 is provided on the upper surface of the side assembly ring 5 near the side wall of the central support 7. An annular lifting limit cover 18 controlled by the adjustment motor 3 is movably installed inside the annular assembly adjustment groove 17. Multiple arc-shaped limit lifting grooves 19 are provided on the inner arc-shaped surface of the annular assembly adjustment groove 17. An internally threaded lifting cylinder 20 protrudes into the arc-shaped limit lifting groove 19 on the outer surface of the annular lifting limit cover 18. A threaded adjustment longitudinal shaft 21 controlled by the adjustment motor 3 is movably installed on the inner bottom surface of the arc-shaped limit lifting groove 19. The upper end of the threaded adjustment longitudinal shaft 21 is inserted into the internally threaded lifting cylinder 20 and threadedly assembled with the internally threaded lifting cylinder 20. The lower end of the threaded adjustment longitudinal shaft 21 is meshed with the adjustment motor 3 through a transmission gear ring 22 located inside the side assembly ring 5.

[0035] The lower end of the outer side of the threaded adjusting longitudinal shaft 21 and the adjusting shaft of the adjusting motor 3 are both provided with tooth grooves that mesh with the transmission gear ring 22.

[0036] In order to facilitate the rotation adjustment of the annular filter frame 10, an annular transmission tooth groove 23 is provided on the upper surface of the annular filter frame 10 inside the annular lifting limit cover 18. The drive motor 4 is driven by the drive gear 24 at the top of the drive shaft meshing with the annular transmission tooth groove 23.

[0037] To facilitate top-level compression and limiting, the annular lifting limiting cover 18 has an integrated lateral limiting bracket 25 on its lateral arc-shaped surface for limiting the flip-type upper scraper 9 and the flip-type top spraying mechanism.

[0038] First, place the annular filter screen frame 10 inside the annular assembly adjustment groove 17. Then, cover the annular lifting limit cover 18 above the annular filter screen frame 10. While the annular lifting limit cover 18 is descending, control the flip-type upper scraper 9 and the flip-type top spraying mechanism to flip downward. Then, use the lateral limit bracket 25 to limit the flip-type upper scraper 9 and the flip-type top spraying mechanism from the top.

[0039] To facilitate the drive, the flip-type upper scraper 9 is an arc-shaped scraper, and a spiral conveying shaft 26 is movably mounted on the inner arc-shaped surface of the flip-type upper scraper 9. A central hydraulic motor 28 for driving the spiral conveying shaft 26 is fixedly mounted inside the central support seat 7.

[0040] The centrally located hydraulic motor 28 is connected to the screw conveyor shaft 26 via a bevel gear set on the bottom drive shaft. The screw conveyor shaft 26 controls the engagement and disengagement of the bevel gear set by flipping.

[0041] To facilitate lateral slag discharge, an internal material guide channel 29 is provided at corresponding positions on the side wall of the annular lifting limit cover 18 and the inside of the lateral assembly ring 5. An inverted L-shaped lateral slag discharge pipe 30 connected to the internal material guide channel 29 is fixed on the outer side of the main tower body 1. A bottom slag collection box 31 connected to the lateral slag discharge pipe 30 is fixed at the lower end of the outer side of the main tower body 1.

[0042] The spiral conveyor shaft 26 is driven by the central hydraulic motor 28 in the prior art. The spiral conveyor shaft 26 then drives the crystals in the flip-type upper scraper 9 to be introduced from inside the flip-type upper scraper 9 into the internal guide channel 29. Then, the crystals are introduced from inside the internal guide channel 29 into the lateral slag discharge pipe 30. Under the action of gravity, the crystals fall into the bottom slag box 31, and people can separate the crystals from the bottom.

[0043] To prevent crossflow, an elastic check plate is installed between the bottom slag collection box 31 and the side slag discharge pipe 30.

[0044] To facilitate elastic compression and allow for automatic control of upward flipping adjustment after separation, bottom compression springs 32 are installed on the bottom surface of the upper storage groove 13 for easy elastic reset.

[0045] This invention discloses a self-maintaining nitric acid removal tower that uses an automatic maintenance method to clean and remove slag from the surface of the annular filter screen frame 10, greatly extending the maintenance cycle and reducing later operating costs. The drive motor 4 rotates the entire annular filter screen frame 10, automatically scraping away surface crystals and maintaining the cleanliness of the annular filter screen frame 10, thereby improving gas delivery reaction efficiency. The entire device can be quickly controlled for disassembly and separation by adjusting the motor 3, reducing the difficulty of later disassembly and separation and making operation simpler and more convenient. Hydraulic power is used to drive the spiral conveying shaft 26 located inside the tilting upper scraper plate 9 to rotate, allowing for rapid removal of solid crystals from the tower while scraping. The low-position operation for slag discharge greatly enhances safety and convenience. An annular lifting and limiting cover 18, controlled by the adjusting motor 3, is movably installed inside the annular assembly adjustment groove 17, which not only improves the stability of the annular filter screen frame 10, the tilting upper scraper plate 9, and the tilting top spraying mechanism, but also enhances the safety and durability of the transmission mechanism.

[0046] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A self-maintaining disengagement nitric acid tower comprising a main tower body (1), an external infusion pipe (2) for conveying saturated ammonium sulfate solution, a regulating motor (3) and a driving motor (4), characterized in that: The inner side of the main tower body (1) is fixedly provided with an integral structure lateral assembly ring (5), the middle part of the inner part of the main tower body (1) is fixedly provided with a middle support seat (7) through the arc-shaped mounting bracket (6) at the bottom of the lateral assembly ring (5), the central position of the upper end of the middle support seat (7) is fixedly connected with a reverse L-shaped top liquid inlet pipe (8) for connecting an external liquid inlet pipe (2), the outer side of the middle support seat (7) is movably provided with a reverse upper scraping plate (9) and a reverse top spraying mechanism connected with the top liquid inlet pipe (8), the lateral assembly ring (5) and the middle support seat (7) are movably provided with an annular filter screen frame (10), the outer side of the main tower body (1) is fixedly provided with a first lateral assembly seat (11) for mounting an adjusting motor (3) and a second lateral assembly seat (12) for mounting a driving motor (4); An annular assembly adjusting groove (17) is formed in the upper surface of the lateral assembly ring (5) near the side wall of the middle support seat (7), an annular lifting limiting cover shell (18) controlled by the adjusting motor (3) is movably arranged in the annular assembly adjusting groove (17), a plurality of arc-shaped limiting lifting grooves (19) are formed in the inner arc-shaped surface of the annular assembly adjusting groove (17), the outer side of the annular lifting limiting cover shell (18) is provided with an internally-threaded lifting cylinder (20) protruding into the arc-shaped limiting lifting groove (19), and the inner bottom surface of the arc-shaped limiting lifting groove (19) is movably provided with a threaded adjusting longitudinal shaft (21) controlled by the adjusting motor (3). An annular transmission gear groove (23) is formed in the upper surface of the annular filter screen frame (10) inside the annular lifting limiting cover shell (18), and the driving motor (4) is in meshing transmission with the annular transmission gear groove (23) through the driving gear (24) at the top end of the driving shaft. The lateral arc-shaped surface of the annular lifting limiting cover shell (18) is provided with an integral structure lateral limiting support (25) for limiting the reverse upper scraping plate (9) and the reverse top spraying mechanism. The reverse upper scraping plate (9) is an arc-shaped scraping plate, and a spiral conveying shaft (26) is movably arranged on the inner arc-shaped surface of the reverse upper scraping plate (9).

2. A self-maintaining denitration tower according to claim 1, characterized in that: The upper surface of the middle support seat (7) is provided with a plurality of annularly arranged upper receiving grooves (13), the inner walls on both sides of the upper receiving groove (13) are symmetrically provided with lateral liquid guide holes in communication with the top liquid inlet pipe (8), and the reverse top spraying mechanism is movably arranged in the lateral liquid guide holes through the two side assembly shaft tubes (14).

3. A self-maintaining de-nitrator tower as claimed in claim 2, wherein: The reverse top spraying mechanism comprises a reverse adjusting pipe (15) provided with the assembly shaft tube (14) on both sides and an atomizing nozzle (16) fixed on the arc-shaped side wall of the reverse adjusting pipe (15).

4. A self-maintaining denitration tower as claimed in claim 2, wherein: The reverse upper scraping plate (9) is movably arranged in the lateral liquid guide holes through the lateral assembly shafts on the outer walls on both sides and is movably arranged in the upper receiving groove (13).

5. A self-maintaining denitration tower as claimed in claim 1, wherein: The annular lifting limiting cover shell (18) side wall and the corresponding position inside the lateral assembly ring (5) are provided with an internal material flow guide channel (29), the outer side surface of the main tower body (1) is fixed with a reverse L-shaped structure lateral slag discharge pipe (30) connected with the internal material flow guide channel (29), and the lower end of the outer side surface of the main tower body (1) is fixed with a bottom slag accumulation box (31) connected with the lateral slag discharge pipe (30).

6. A self-maintaining denitration tower as claimed in claim 2, wherein: The bottom extrusion spring (32) convenient for elastic return is mounted on the inner bottom surface of the upper receiving groove (13).

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