Ammonium phosphate drying tower wall structure

Abstract

The utility model relates to the technical field of drying towers, and discloses a tower wall structure of an ammonium phosphate drying tower, a ventilating duct is arranged at the side end of the drying tower, a slurry nozzle is arranged at the top end of the drying tower, more than three placing plates are arranged in the drying tower, and an annular air duct is arranged on the more than three placing plates. Three connecting pipes extend out of the ventilating duct, penetrate through the drying tower and extend into the drying tower to be connected with the annular air duct, cleaning devices are arranged at the upper ends of the more than three placing plates, an air heater is arranged on the side wall of the bottom end of the drying tower, and an upwards inclined air duct nozzle is arranged at the upper end of the annular air duct and is aligned to the tower wall; when the drying tower is used, most of materials are blown away by the dry hot air ejected by the nozzles on the semi-ellipsoids, a good hot air barrier is formed, the ammonium phosphate slurry and dust are prevented from scaling on the tower wall, the dry hot air heats the ammonium phosphate slurry in the drying tower, the original dry hot air is well utilized, the drying effect is greatly improved, and the problems caused by scaling on the tower wall are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying towers, in particular to a tower wall structure of a phosphate ammonium drying tower. Background Art

[0002] The phosphate ammonium drying tower is a device used to dry phosphate ammonium products, mainly using spray drying or fluidized drying technology. The tower body of the phosphate ammonium drying tower is mainly composed of a main body, an air inlet device, a dryer, an exhaust device, support and reinforcement ribs, an insulation layer and an anti-corrosion layer. Further, referring to the Chinese patent CN212431675U: its annular wind cavity can be arranged between the sections of the furnace body, and the annular wind cavity includes a pair of parallel and spaced rings, and an inner ring layer, a middle layer and an outer layer are arranged between the rings. The inner ring layer, the middle layer and the outer layer are all in a ring structure and are spaced from each other. The inner ring layer is processed with a first air hole along the side wall array, and the middle layer is processed with a second air hole along the side wall array. The outer layer is connected with an air intake pipe; the air intake main pipe is connected to the air intake pipe. The hot air intake is uniform, so that the product is heated better and the drying effect of the product is improved. The furnace body is connected by multiple main pipes, which is convenient for transportation and installation. In the above existing structure, the dryer is the core part, and generally uses spray drying or fluidized drying technology. The drying tower structure is that the drying hot air goes from bottom to top, and the phosphate ammonium slurry goes from top to bottom. The bottom of the phosphate ammonium slurry is dried by hot air. The height of the drying tower is tens of meters. The hot air continues to cool down in the process of going up. When the bottom hot air temperature is too high and exceeds 190°C, it causes the phosphate ammonium to melt; when the temperature is too low, the hot air above is not enough to evaporate the water, which is easy to cause the phosphate ammonium water content to exceed the standard and is difficult to control. After a period of production and operation, there are many materials in the wall structure of the drying tower, and the scaling materials on the wall are easy to collapse, which causes the hot air nozzle at the bottom of the drying tower to be buried, making the drying operation unable to operate or reducing production capacity. In view of this, the drying tower currently needs to pass through the wind cavity arranged inside the tower drying furnace to make the hot air blow to the tower wall. However, since the above-mentioned wind cavity is mostly located at the outer end, it can only blow horizontally when blowing inside, that is, only one section of the tower wall can be dried, so that the material accumulation at this position is less, but the problem of excessive material storage at other positions cannot be solved, resulting in insufficient cleaning. Therefore, a tower wall structure of phosphate ammonium drying tower is proposed. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a tower wall structure of a phosphate ammonium drying tower, which can greatly improve the drying effect and prevent the problems caused by scaling of the tower wall, thereby solving the above-mentioned problems.

[0005] (II) Technical solution

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A tower wall structure of a phosphate ammonium drying tower includes a drying tower, characterized in that: a ventilation duct is arranged at the side end of the drying tower, and a slurry nozzle is opened at the top of the drying tower; more than three placement plates are arranged inside the drying tower, and annular air ducts are coaxially arranged on the more than three placement plates; the ventilation duct extends to the inside of the drying tower through a connecting pipe that penetrates the drying tower, and is connected to the annular air duct, and an upwardly inclined air duct nozzle is fixedly connected to the upper end of the annular air duct; except for the lowest annular air duct, the injection paths of the air duct nozzles on the same annular air duct are combined to form a cone shape that gradually expands from bottom to top, and the inclined injection ports all point to the inner wall direction of the drying tower; the side wall of the lowest annular air duct is fixedly connected to a horizontal air duct nozzle.

[0008] Preferably, the placement plate is arranged in a circular ring shape, and a circular groove is opened in the annular cavity of the placement plate, and the inner wall of the circular groove is fixedly connected to the annular air duct.

[0009] Preferably, the ring plate is coaxially fixed on the placement plate, and the ring plate and the circular groove enclose to form the annular air duct.

[0010] Preferably, a hot air blower is provided on the bottom side wall of the drying tower.

[0011] Preferably, the placement plate has an L-shaped cross-section, and a cleaning device for pushing away dirt on the horizontal section of the placement plate is provided in the vertical section of the placement plate, the cleaning device comprising a slide groove, a slider, a connecting column, a push plate and a turntable, four slide grooves are radially opened at the placement plate, and sliders are radially movably connected in the four slide grooves, and the upper end of the slider is fixedly connected to the connecting column; the working end of the slider is fixedly connected to the push plate, and a turntable is arranged above the slider so as to be coaxially rotatable around the axis of the placement plate, four adjustment grooves are opened at the turntable, and the four adjustment grooves are inclined from the inside to the outside, and the four adjustment grooves are matched with the four connecting columns one by one.

[0012] Preferably, the turntable passes through a limiting groove on the outer wall of the drying tower through an adjusting block, so that the turntable can be driven to rotate by an external power source.

[0013] Preferably, there are four pusher plates, all of which are arc-shaped and fit together to form a full circle coaxial with the placement plate; the four pusher plates are all fitted to the horizontal section of the placement plate.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a phosphate ammonium drying tower wall structure, which has the following beneficial effects:

[0016] 1. The tower wall structure of the phosphate ammonium drying tower is provided with an upwardly inclined air duct nozzle at the upper end of the annular air duct, so that the air duct nozzle is aimed at the tower wall. Most of the materials will be blown away by the dry hot air ejected from the air duct nozzle, forming a good hot air barrier to prevent the phosphate ammonium slurry and dust from scaling the tower wall. At the same time, the dry hot air can also heat the phosphate ammonium slurry in the drying tower, making good use of the original configuration of the original dry hot air, greatly improving the drying effect, and preventing many problems caused by scaling of the tower wall.

[0017] 2. Furthermore, since the annular air duct needs a certain distance relative to the tower wall in order to achieve the spraying effect, the annular air duct needs to be installed in the annular cavity of the placement plate. The upper annular surface of the placement plate, or more specifically, the upper surface of the horizontal section of the placement plate, may receive the dirt that is blown down. When the material is blown down and accumulates on the placement plate, the cleaning device preset in the placement plate can be used to push the push plate to the middle, so that the material on the horizontal section falls down, preventing the material from being blown down by the hot air and accumulating above the annular air duct, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a three-dimensional diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the interior of the drying tower of the utility model;

[0020] Figure 3 This is a schematic diagram of the annular air duct of the utility model;

[0021] Figure 4 This is a schematic diagram of the interior of the placement board of the utility model;

[0022] Figure 5 It is a schematic diagram of the cleaning device of the utility model.

[0023] In the figure: 1. Drying tower; 2. Ventilation duct; 3. Slurry nozzle; 4. Placement plate; 5. Annular air duct; 6. Hot air blower; 7. Circular groove; 8. Air duct nozzle; 9. Slide; 10. Sliding block; 11. Connecting column; 12. Pushing plate; 13. Turntable; 14. Limiting groove; 15. Adjusting block; 16. Adjusting groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 A tower wall structure of a phosphate ammonium drying tower comprises a drying tower 1, a ventilation duct 2 is arranged at the side end of the drying tower 1, a slurry nozzle 3 is opened at the top of the drying tower 1, and more than three placement plates 4 are arranged inside the drying tower 1. An annular air duct 5 is arranged on the more than three placement plates 4, and three connecting pipes extend from the ventilation duct 2 to penetrate the drying tower 1 and extend to the inside to be connected with the annular air duct 5. A cleaning device is arranged at the upper end of the more than three placement plates 4, and a hot air blower 6 is arranged on the side wall of the bottom end of the drying tower 1. When the lower end of the drying tower 1 circulates hot air inside the tower through the hot air blower 6, the ventilation duct 2 at the side end also conveys wind power to the more than three annular air ducts 5, so that hot air is sprayed out from the more than three annular air ducts 5 to sweep the scale on the tower wall, and then the dirt that falls on the placement plate is pushed to the middle by the cleaning device until it falls, so as to better clean the tower wall.

[0026] Furthermore, more than three placement plates 4 are arranged in an annular shape, and the cross section of the placement plate 4 is L-shaped. A circular groove 7 is provided at the annular cavity of the placement plate 4, and the inner wall of the circular groove 7 forms an annular air duct 5 by cooperating with the annular plate.

[0027] Furthermore, an upwardly inclined air duct nozzle 8 is fixedly connected to the annular air duct 5, and the inclined injection ports of the other air duct nozzles 8 except the lowest annular air duct 5 are all inclined to the inner wall of the drying tower 1, and the side wall of the lowest annular air duct 5 is fixedly connected with a horizontal air duct nozzle 8. Hot air is ejected from the air duct nozzle 8 and blown toward the tower wall, so that the materials adhering to the tower wall are blown off.

[0028] Furthermore, considering the L-shaped annular structure of the placement plate 4 itself, part of the blown-off dirt will fall onto the placement plate 4, so a cleaning device is arranged. The cleaning device itself can be regarded as a similar rotating centering mechanism, specifically including a slide 9, a slider 10, a connecting column 11, a push plate 12 and a turntable 13. Four slides 9 are provided in the side wall of the placement plate 4, and the four slides 9 are movably connected with a slider 10, the upper end of the slider 10 is fixedly connected with a connecting column 11, and the slider 10 is fixedly connected with a push plate 12 at one end outside the side wall of the placement plate 4. A turntable 13 is movably connected to the position of the upper end of the slider 10 inside the side wall of the placement plate 4, and a limiting groove 14 is provided on the outer wall of the drying tower 1 corresponding to the position of the turntable 13, and an adjustment block 15 is matched in the limiting groove 14. The staff can adjust the adjustment block 15 from the outer wall of the drying tower 1 manually or by using an external power source such as a motor, so that the adjustment block 15 drives the turntable 13 to rotate. During the rotation of the turntable 13, the adjustment slot 16 above drives the connecting column 11 to contract inward, so that the connecting column 11 drives the slider 10 to move in the slide slot 9, and the dirt on the placement plate 4 is pushed to the middle by the contraction of the push plate 12, thereby ensuring the cleanliness of the tower wall. Figure 4-5As shown, four adjustment slots 16 are provided at the upper end of the turntable 13, and the four adjustment slots 16 are arranged in an inclined shape from the inside to the outside, and the four adjustment slots 16 and the connecting column 11 are mutually engaged to form the above-mentioned rotating centering mechanism. At the same time, the four pusher plates 12 are arranged in an arc shape, and the four pusher plates 12 are all fitted together with the inner wall of the placement plate 4.

[0029] Working principle: When the lower end of the drying tower 1 circulates hot air inside the tower through the hot air blower 6, the hot air at the ventilation duct 2 will be transported to more than three annular air ducts 5, so that more than three annular air ducts 5 will eject hot air. The upper end of the annular air duct 5 is provided with multiple inclined air duct nozzles 8, so that the hot air is ejected from the air duct nozzles 8 and blows toward the tower wall, and the scale adhering to the tower wall is blown away by air blowing, so that the scale on the tower wall falls off. Considering that some of the materials will fall on the placement plate 4 and accumulate, the cleaning device can be used to push the materials that fall on the placement plate 4 to the middle, which can better clean the tower wall, thereby ultimately ensuring the cleanliness of the tower wall.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A phosphate ammonium drying tower wall structure, comprising a drying tower (1), characterized in that: The side end of the drying tower (1) is provided with a ventilation duct (2), and the top of the drying tower (1) is provided with a slurry nozzle (3); more than three placement plates (4) are provided inside the drying tower (1), and an annular air duct (5) is coaxially provided on each of the more than three placement plates (4); the ventilation duct (2) extends into the interior of the drying tower (1) through a connecting pipe penetrating the drying tower (1), and is connected to the annular air duct (5), and an upwardly inclined air duct nozzle (8) is fixedly connected to the upper end of the annular air duct (5); except for the annular air duct (5) at the lowermost end, the injection paths of the air duct nozzles (8) on the same annular air duct (5) are combined to form a cone shape that gradually expands outward from bottom to top, and the inclined injection ports all point to the inner wall direction of the drying tower (1); the side wall of the annular air duct (5) at the lowermost end is fixedly connected to a horizontal air duct nozzle (8).

2. The wall structure of a phosphate ammonium drying tower according to claim 1, characterized in that: The placement plate (4) is arranged in a circular ring shape, and a circular groove (7) is provided in the annular cavity of the placement plate (4), and the inner wall of the circular groove (7) is fixedly connected to the annular air duct (5).

3. The wall structure of a phosphate ammonium drying tower according to claim 2, characterized in that: The ring plate is coaxially fixed on the placement plate (4), and the ring plate and the circular groove (7) are enclosed to form the annular air duct (5).

4. The wall structure of a phosphate ammonium drying tower according to claim 2, characterized in that: A hot air blower (6) is arranged on the side wall of the bottom end of the drying tower (1).

5. The wall structure of a phosphate ammonium drying tower according to claim 3 or 4, characterized in that: The placement plate (4) has an L-shaped cross section. A cleaning device for removing dirt from the horizontal section of the placement plate is arranged in the vertical section of the placement plate (4). The cleaning device comprises a slide groove (9), a slider (10), a connecting column (11), a push plate (12) and a turntable (13). Four slide grooves (9) are radially opened at the placement plate (4), and the four slide grooves (9) are radially movably connected with the slider (10). The upper end of the slider (10) is fixedly connected with the connecting column (11); the working end of the slider (10) is fixedly connected with the push plate (12), and a turntable (13) is arranged above the slider (10) so as to be coaxially rotatable around the axis of the placement plate (4). Four adjustment grooves (16) are opened at the turntable (13), and the four adjustment grooves (16) are arranged in an inclined shape from the inside to the outside. The four adjustment grooves (16) are matched with the four connecting columns (11) one by one.

6. The wall structure of a phosphate ammonium drying tower according to claim 5, characterized in that: The rotating disk (13) passes through the limiting groove (14) on the outer wall of the drying tower (1) through the adjusting block (15), so that the rotating disk (13) can be driven to rotate by an external power source.

7. The wall structure of a phosphate ammonium drying tower according to claim 5, characterized in that: There are four pusher plates (12) all arranged in an arc shape, and assembled together to form a full circle coaxial with the placement plate (4); the four pusher plates (12) are all attached to the horizontal section of the placement plate (4).

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