Diammonium phosphate granulating and drying system

Abstract

The utility model discloses a diammonium phosphate granulating and drying system which comprises a grid plate, a grid plate is horizontally fixed at the lower part of the granulator, and a plurality of strip-shaped holes which are parallel to one another are formed in the grid plate; a plurality of sliding grooves are formed in the inner wall of the tail of the drying machine in the axial direction, a crushing base plate is inserted into each sliding groove in a sliding mode, the crushing base plates are fixedly connected with the drying machine through penetrating screws, and a plurality of crushing teeth are vertically fixed to the crushing base plates. The device has the advantages that caked materials granulated by the granulator are intercepted on the grid plate, and part of the caked materials are pushed out from the discharge door by the material pushing plate, so that the caked materials are cleaned; after the materials are dried by the drying machine, the materials are thrown up by the material raising plate and fall on the crushing teeth on the crushing base plate under the action of gravity, so that the primary crushing effect on the dried caked materials is achieved, the caked materials generated in the granulation process can be effectively crushed, and the normal production efficiency and the production quality are prevented from being influenced by material blockage.

Description

Technical Field

[0001] The utility model relates to the technical field of diammonium phosphate production equipment, in particular to a diammonium phosphate granulation and drying system. Background Art

[0002] Industrially, in the production process of diammonium phosphate, after the raw material phosphoric acid is neutralized with liquid ammonia, the reaction slurry is sprayed into the granulator. After granulation by the granulator, it is sent to the dryer through the feeding chute for drying. The dried fertilizer is sent to the bucket elevator through the discharge chute, and then sent to the silo through the bucket elevator.

[0003] In the actual production granulation process, there are often improper moisture control and unbalanced ratio of phosphoric acid and liquid ammonia, which will lead to agglomeration of materials during the granulation process. When the agglomerated materials are sent to the entrance of the bucket elevator through the dryer, there will be a material blockage phenomenon, and the materials will pile up along the discharge chute, causing serious material accumulation in the dryer, affecting production efficiency and production quality. Utility Model Content

[0004] The utility model aims to provide a diammonium phosphate granulation and drying system which can effectively handle material agglomeration to avoid material blockage.

[0005] The utility model is implemented by the following technical scheme: a diammonium phosphate granulation and drying system, which comprises a granulator, a dryer and a bucket elevator, the bottom discharge port of the granulator is communicated with the inlet of the dryer through a feeding chute, the outlet of the dryer is communicated with the feed port of the bucket elevator through a discharge chute, and a lifting plate is fixed on the inner wall of the dryer; it also comprises a grate plate, a crushing base plate and crushing teeth; the grate plate is horizontally fixed on the lower part of the granulator, the outer edge of the grate plate is fixedly fitted with the inner wall of the granulator, and a plurality of mutually parallel long strip holes are provided on the grate plate; a plurality of slide grooves are axially provided on the inner wall of the tail of the dryer, and each of the slide grooves is evenly distributed along the circumference of the dryer, and a crushing base plate is slidably inserted in each of the slide grooves, the crushing base plate is fixedly connected to the dryer by penetrating screws, and a plurality of crushing teeth are vertically fixed on the crushing base plate.

[0006] Furthermore, it also includes a cleaning cylinder and a discharge door. The discharge door is provided on the side wall of the granulator on one side of the grate plate, and the cleaning cylinder is fixed on the outer wall of the granulator opposite to the discharge door. The telescopic rod of the cleaning cylinder is sealed and slidably inserted into the granulator, and a push plate is fixed at the end of the telescopic rod of the cleaning cylinder. The bottom surface of the push plate is in sliding contact with the top surface of the grate plate, and a push rod extending into the corresponding long strip hole is vertically fixed on the bottom surface of the push plate.

[0007] Furthermore, a lock buckle is installed on the outer wall of the granulator adjacent to the discharge door, and after the discharge door is closed, the lock buckle is clamped on the outer wall of the discharge door.

[0008] Furthermore, it also includes a conical frame, which is fixed at the inlet of the discharge chute and the tip of the conical frame faces the dryer; a plurality of secondary crushing plates are evenly fixed along the circumferential direction on the conical surface of the conical frame, and secondary crushing spikes are vertically fixed on the plate surface of the secondary crushing plate.

[0009] The utility model has the advantages that the granular material granulated by the granulator enters the dryer through the long holes, while part of the agglomerated material is retained on the grate plate, alleviating the blockage of subsequent equipment, and the push plate pushes part of the agglomerated material out of the discharge door to realize the cleaning of the agglomerated material.

[0010] After being dried by the dryer, the material is thrown up by the lifting plate and falls on the crushing teeth on the crushing base plate under gravity, which plays the role of primary crushing of the dried agglomerated material and alleviates the subsequent blockage of the bucket elevator; after the material is dried by the dryer, it falls into the discharge chute and is further crushed on the secondary crushing spikes of the secondary crushing plate. Therefore, the utility model can effectively crush the agglomerates generated in the granulation process to avoid blockage that affects the normal production efficiency and production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 for Figure 1 A-direction view of the middle grate plate, pusher plate and pusher rod.

[0013] Figure 3 for Figure 1 B-direction view of the middle crushing base plate and crushing teeth.

[0014] Figure 4 for Figure 1 C-direction view of the middle cone frame, secondary crushing plate and secondary crushing spikes.

[0015] The components in the accompanying drawings are marked as follows: granulator 1, dryer 2, chute 2.1, bucket elevator 3, feed chute 4, discharge chute 5, lifting plate 6, grate plate 7, long holes 7.1, crushing base plate 8, crushing teeth 9, screws 10, cleaning cylinder 11, discharge door 12, push plate 13, push rod 14, lock 15, conical frame 16, secondary crushing plate 17, secondary crushing spikes 18. DETAILED DESCRIPTION

[0016] 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 of 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.

[0017] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0018] like Figures 1 to 4 As shown, the present embodiment provides a diammonium phosphate granulation and drying system, which includes a granulator 1, a dryer 2 and a bucket elevator 3. The bottom discharge port of the granulator 1 is connected to the inlet of the dryer 2 through a feeding chute 4. After the raw phosphoric acid and liquid ammonia are neutralized, the reaction slurry is sprayed into the granulator 1. After granulation by the granulator 1, it is sent to the dryer 2 through the feeding chute 4 for drying. The dryer 2 is an existing equipment in the field, and the specific structure is not repeated here. The dryer 2 is arranged to be tilted downward along the direction of the material. Hot air will be introduced during the rotation to dry the material. A lifting plate 6 is fixed to the inner wall of the dryer 2 to facilitate the dispersion of the material and improve the drying efficiency.

[0019] The outlet of the dryer 2 is connected to the feed port of the bucket elevator 3 through the discharge chute 5, and the dried material falls into the feed port of the bucket elevator 3 along the discharge chute 5, and is sent into the silo by the bucket elevator 3; it also includes a grate plate 7, a crushing base plate 8 and a crushing tooth 9; a grate plate 7 is horizontally fixed to the lower part of the granulator 1, and the outer edge of the grate plate 7 is fixed to the inner wall of the granulator 1, and a plurality of parallel long holes 7.1 are opened on the grate plate 7. The granulated granular material passes through the long holes 7.1 and enters the dryer 2, while the agglomerated material is retained on the grate plate 7 to avoid clogging subsequent equipment.

[0020] It also includes a cleaning cylinder 11 and a discharge door 12. The discharge door 12 is provided on the side wall of the granulator 1 on one side of the grate plate 7. A lock 15 is installed on the outer wall of the granulator 1 adjacent to the discharge door 12. The lock 15 is an existing buckle-type fastener for locking doors and windows, and its fixed part is installed on the discharge door 12, and the movable part is installed on the outer wall of the granulator 1; after the discharge door 12 is closed, the lock 15 is clamped on the outer wall of the discharge door 12. When the discharge door 12 needs to be opened, the lock 15 is opened to cancel the restriction on the discharge door 12, so that the discharge door 12 can be opened easily; a cleaning cylinder 11 is fixed on the outer wall of the granulator 1 opposite to the discharge door 12, and the telescopic rod of the cleaning cylinder 11 is sealed and slidably penetrated into the granulator 1, and the extension rod of the cleaning cylinder 11 is extended to the outer wall of the granulator 1 A push plate 13 is fixed to the end of the retracted rod, and the bottom surface of the push plate 13 is in sliding contact with the top surface of the grate plate 7. A push rod 14 extending into the corresponding long hole 7.1 is vertically fixed to the bottom surface of the push plate 13; after granulation for a period of time, some agglomerated materials will remain on the grate plate 7. In order to ensure that the granular materials after granulation can smoothly pass through the long holes 7.1, the discharge door 12 is opened, and the telescopic rod of the cleaning cylinder 11 is controlled to extend, and part of the agglomerated materials are pushed out from the discharge door 12 by the push plate 13. At the same time, the push rod 14 can push the agglomerated materials stuck in the long holes 7.1 toward the discharge door 12; some agglomerated materials on the edge of the grate plate 7 that are not pushed out by the push plate 13 will be removed manually after the production is stopped by opening the discharge door 12.

[0021] A plurality of chutes 2.1 are provided axially on the inner wall of the tail end of the dryer 2. The chutes 2.1 are evenly arranged along the circumference of the dryer 2. A crushing base plate 8 is slidably inserted in each chute 2.1. The crushing base plate 8 is fixedly connected to the dryer 2 by screws 10 for easy disassembly and replacement. A plurality of crushing teeth 9 are vertically fixed on the crushing base plate 8. A small amount of agglomerated materials still exist in the material after passing through the grate plate 7 and pass through the long holes 7.1 to enter the dryer 2. After being dried by the dryer 2, when passing through the tail end of the dryer 2, the materials are thrown up by the lifting plate 6 of the front section and fall to the crushing teeth 9 on the crushing base plate 8 under gravity, which plays the role of primary crushing of the dried agglomerated materials and alleviates the subsequent blocking of the bucket elevator 3.

[0022] It also includes a conical frame 16, which is fixed at the entrance of the discharge chute 5, and the tip of the conical frame 16 faces the dryer 2; a plurality of secondary crushing plates 17 are evenly fixed on the conical surface of the conical frame 16 in the circumferential direction, and secondary crushing spikes 18 are vertically fixed on the plate surface of the secondary crushing plate 17; after the material dried by the dryer 2 falls into the discharge chute 5, it first falls on the secondary crushing spikes 18 of the secondary crushing plate 17 to further crush the dried agglomerated material into particles, and the crushed granular material falls into the bucket elevator 3 along the discharge chute 5 through the gap between the adjacent secondary crushing plates 17 on the conical frame 16; therefore, the utility model can effectively crush the agglomerates generated in the granulation process to avoid blockage and affect the normal production efficiency and production quality.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A diammonium phosphate granulation and drying system, comprising a granulator, a dryer and a bucket elevator, wherein the bottom discharge port of the granulator is connected to the inlet of the dryer through a feeding chute, the outlet of the dryer is connected to the feed port of the bucket elevator through a discharge chute, and a lifting plate is fixed to the inner wall of the dryer; It is characterized in that It also includes a grate plate, a crushing base plate and crushing teeth; The grate plate is horizontally fixed at the lower part of the granulator, the outer edge of the grate plate is fixedly fitted with the inner wall of the granulator, and the grate plate is provided with a plurality of long holes parallel to each other; The inner wall of the tail of the dryer is provided with a plurality of slide grooves along the axial direction, and the slide grooves are evenly distributed along the circumference of the dryer. A crushing base plate is slidably inserted in each of the slide grooves, and the crushing base plate is fixedly connected to the dryer by penetrating screws, and a plurality of crushing teeth are vertically fixed on the crushing base plate.

2. A diammonium phosphate granulation and drying system according to claim 1, characterized in that: It also includes a cleaning cylinder and a discharge door. The discharge door is provided on the side wall of the granulator on one side of the grate plate, and the cleaning cylinder is fixed on the outer wall of the granulator opposite to the discharge door. The telescopic rod of the cleaning cylinder is sealed and slidably penetrated into the granulator, and a push plate is fixed at the end of the telescopic rod of the cleaning cylinder. The bottom surface of the push plate is in sliding contact with the top surface of the grate plate, and a push rod extending into the corresponding long strip hole is vertically fixed on the bottom surface of the push plate.

3. A diammonium phosphate granulation and drying system according to claim 2, characterized in that: A lock buckle is installed on the outer wall of the granulator adjacent to the discharge door. After the discharge door is closed, the lock buckle is clamped on the outer wall of the discharge door.

4. A diammonium phosphate granulation and drying system according to any one of claims 1 to 3, characterized in that: It also includes a conical frame, which is fixed at the entrance of the discharge chute and the tip of the conical frame faces the dryer; a plurality of secondary crushing plates are evenly fixed on the conical surface of the conical frame along the circumferential direction, and secondary crushing spikes are vertically fixed on the plate surface of the secondary crushing plate.

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