Device for improving yield of monopotassium phosphate

Abstract

The utility model discloses a device for improving the yield of monopotassium phosphate. The device comprises a drying machine, a vibrating screen, an oscillating granulator, a bucket elevator, a first screw conveyor and a finished product bin, a discharging port of the drying machine is communicated with a feeding port of the vibrating screen, a small particle outlet of the vibrating screen is communicated with the finished product bin, a large particle outlet of the vibrating screen is communicated with a feeding port of the oscillating granulator through the bucket elevator, and a discharging port of the oscillating granulator is communicated with the finished product bin through the first spiral conveyor. The device can recover blocky monopotassium phosphate on line, crush and recover the blocky monopotassium phosphate, and has the advantages of high recovery rate and high automation degree.

Description

Technical Field

[0001] The utility model relates to the technical field of potassium dihydrogen phosphate production, and particularly relates to a device for improving the yield of potassium dihydrogen phosphate. Background Art

[0002] Potassium dihydrogen phosphate is used as a buffer and a culture medium industrially; and is used as a highly efficient phosphorus-potassium compound fertilizer agriculturally, and is widely applicable to various types of cash crops, grains, fruits, vegetables, etc., and has many excellent functions such as significantly increasing production and income, improving and optimizing quality, lodging resistance, pest and disease resistance, preventing premature senility, etc., and also has the function of overcoming the nutrient deficiency caused by the decline of the absorption capacity of the aging roots in the later growth stage of crops. Therefore, the production of potassium dihydrogen phosphate is of great significance.

[0003] Corn steep liquor is a by-product generated in the process of wet production of corn starch, and the phytic acid content therein is 1-2%. Recovering phytic acid from corn steep liquor, preparing potassium phytate, and then through hydrolysis, inositol and potassium dihydrogen phosphate can be generated. Compared with common production processes of potassium dihydrogen phosphate such as the neutralization method and the double decomposition method, producing potassium dihydrogen phosphate with corn steep liquor as the raw material does not require phosphate rock, and has obvious economic and social benefits.

[0004] For the potassium dihydrogen phosphate prepared from corn steep liquor, the crystal particles are generally relatively fine, and agglomeration is likely to occur during the drying process. A large number of lumps are screened out during sieving and need to be returned to the crude product dissolution process for dissolution and then recrystallization, which not only increases the labor load of employees, but also affects the product yield. Therefore, how to effectively recover and process the lumpy potassium dihydrogen phosphate to prepare and improve the yield of potassium dihydrogen phosphate is a problem that needs to be solved by those skilled in the art. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: aiming at the deficiencies existing in the prior art, to provide a device for improving the yield of potassium dihydrogen phosphate, which can recover lumpy potassium dihydrogen phosphate online, crush it and then recycle it, and has the advantages of high recovery rate and high automation degree.

[0006] To solve the above technical problem, the technical solution of the utility model is:

[0007] A device for improving the yield of potassium dihydrogen phosphate includes a dryer, a vibrating screen, a rocking granulator, a bucket elevator, a first screw conveyor, and a finished product bin; the discharge port of the dryer is communicated with the feed port of the vibrating screen, the small particle outlet of the vibrating screen is communicated with the finished product bin, the large particle outlet of the vibrating screen is communicated with the feed port of the rocking granulator through the bucket elevator, and the discharge port of the rocking granulator is communicated with the finished product bin through the first screw conveyor.

[0008] Preferably, it further includes a bag filter, the air inlet of the bag filter is communicated with the dryer, the discharge port of the bag filter is communicated with the feed inlet of the vibrating screen, and the air outlet of the bag filter is communicated with the induced draft fan through a pipeline.

[0009] Preferably, the dryer is a vibrating fluidized bed.

[0010] Preferably, the vibrating screen is a circular swing screen.

[0011] Preferably, it further includes a second screw conveyor, the feed inlet of the second screw conveyor is communicated with the large particle material outlet of the vibrating screen, and the discharge port of the second screw conveyor is communicated with the feed inlet of the bucket elevator; a plurality of crushing knives are arranged on the inner wall of the second screw conveyor.

[0012] Preferably, the plurality of crushing knives are not arranged in parallel.

[0013] Preferably, an anti-blowing mechanism is further arranged on the bag filter, the anti-blowing mechanism includes a compressed air storage tank, the compressed air storage tank is communicated with the bags inside the bag filter through a blowing pipe, and an electromagnetic pulse control valve is arranged on the blowing pipe.

[0014] Preferably, an anti-blowing port is arranged on one side of the blowing pipe facing the bags of the bag filter.

[0015] Preferably, a differential pressure sensor is arranged on the pipeline connecting the cleaning chamber and the ash hopper of the bag filter, and the differential pressure sensor is interlocked with the electromagnetic pulse control valve.

[0016] Due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0017] The present utility model discloses a device for improving the yield of potassium dihydrogen phosphate, which includes a dryer, a vibrating screen, a swing granulator, a bucket elevator, and a first screw conveyor. After the potassium dihydrogen phosphate granular material dried by the dryer enters the vibrating screen, the qualified particles and fine powder enter the finished product bin, and the blocky materials are screened out. The blocky materials are broken by the swing granulator, and the broken materials are screened by the screen mesh inside the swing granulator. The qualified small particle materials are sent into the finished product bin through the first screw conveyor, so as to quickly realize the online recycling of blocky potassium dihydrogen phosphate and improve the yield of the potassium dihydrogen phosphate finished product. The device has a simple structure, stable operation, automatic operation, and saves labor costs.

[0018] The device is also provided with a bag filter. The air inlet of the bag filter is communicated with the dryer, the discharge port of the bag filter is communicated with the feed inlet of the vibrating screen, and the air outlet of the bag filter is communicated with the induced draft fan through a pipeline. The bag filter processes the hot air flow in the drying process, and the fine powder entrained in the hot air flow is separated and re-entered into the vibrating screen for recovery, further improving the yield of the potassium dihydrogen phosphate finished product.

[0019] The device is also provided with a second screw conveyor. The feed inlet of the second screw conveyor is communicated with the large particle material outlet of the vibrating screen, and the discharge port of the second screw conveyor is communicated with the feed inlet of the bucket elevator; a plurality of crushing knives are arranged on the inner wall of the second screw conveyor; the plurality of crushing knives are not arranged in parallel. The combined action of the feeding auger and the crushing knives in the second screw conveyor can preliminarily crush the massive materials screened by the vibrating screen, thereby improving the recovery rate of the massive materials.

[0020] The bag filter of the device is also provided with an air backwashing mechanism. The air backwashing mechanism includes a compressed air storage tank. The compressed air storage tank is communicated with the bags in the bag filter through a blowing pipe, and an electromagnetic pulse control valve is arranged on the blowing pipe; an air backwashing port is arranged on one side of the blowing pipe facing the bags of the bag filter; a differential pressure sensor is arranged on the pipeline communicating the clean room and the ash hopper of the bag filter, and the differential pressure sensor is interlocked with the electromagnetic pulse control valve. Based on the above setting, the differential pressure sensor monitors the differential pressure between the clean room and the ash hopper in real time. When the differential pressure reaches a certain value, it indicates that the bags are seriously blocked, then the electromagnetic pulse control valve is opened to blow compressed air into the bags to achieve the purpose of cleaning the ash. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0023] In the figure, 1, dryer; 2, vibrating screen; 3, rocking granulator; 4, bucket elevator; 5, first screw conveyor; 6, finished product bin; 7, bag filter; 8, compressed air storage tank; 9, blowing pipe; 10, electromagnetic pulse control valve; 11, clean room; 12, ash hopper; 13, differential pressure sensor; 14, second screw conveyor; 15, crushing knife; 16, air backwashing port; 17, induced draft fan. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] As shown in the figure, a device for improving the yield of potassium dihydrogen phosphate includes a dryer 1, a vibrating screen 2, a rocking granulator 3, a bucket elevator 4, a first screw conveyor 5, and a finished product bin 6. The discharge port of the dryer 1 is communicated with the feed port of the vibrating screen 2. The small particle outlet of the vibrating screen 2 is communicated with the finished product bin 6. The large particle outlet of the vibrating screen 2 is communicated with the feed port of the rocking granulator 3 through the bucket elevator 4. The discharge port of the rocking granulator 3 is communicated with the finished product bin 6 through the first screw conveyor 5. The dryer 1 is a vibrating fluidized bed. The vibrating screen 2 is a YBS circular rocking screen.

[0027] After the wet potassium dihydrogen phosphate is dried by the dryer 1, it is screened by the vibrating screen 2. The small particle materials during the screening process enter the finished product bin 6. The large particle materials during the screening process enter the rocking granulator 3 through the bucket elevator 4. The large particle materials are crushed and filtered through the screen in the rocking granulator 3. The obtained small particle materials enter the first screw conveyor 5 and are transported to the finished product bin 6 by the feeding auger of the first screw conveyor 5. The above device can effectively recycle and process the lumpy potassium dihydrogen phosphate and improve the yield of the potassium dihydrogen phosphate finished product.

[0028] Furthermore, in this embodiment, a bag filter 7 is further included. The air inlet of the bag filter 7 is communicated with the dryer 1. The discharge port of the bag filter 7 is communicated with the feed port of the vibrating screen 2. The air outlet of the bag filter 7 is communicated with an induced draft fan 17 through a pipeline. The bag filter 7 can effectively intercept the fine powder carried out by the hot air flow during the drying process and enter the vibrating screen 2 for treatment, further improving the yield of the potassium dihydrogen phosphate product.

[0029] Further, in this embodiment, an air backwashing mechanism is also provided on the bag filter 7. The air backwashing mechanism includes a compressed air storage tank 8. The compressed air storage tank 8 is connected to the bags inside the bag filter 7 through an air blowing pipe 9. An electromagnetic pulse control valve 10 is provided on the air blowing pipe 9. An air backwashing port 16 is provided on the side of the air blowing pipe 9 facing the bags of the bag filter 7. A differential pressure sensor 13 is provided on the pipe connecting the clean room 11 and the ash hopper 12 of the bag filter 7. The differential pressure sensor 13 is interlocked with the electromagnetic pulse control valve 10. When the bag filter 7 is used for a long time, a large amount of dust will accumulate on the surface of the bags, resulting in blockage and affecting its dust removal effect. In this device, the differential pressure sensor 13 is used to detect the pressure difference between the clean room 11 and the ash hopper 12. When the value reaches the set value, the differential pressure sensor 13 will transmit a signal to an external control system (not shown in the figure). The external control system will open the electromagnetic pulse control valve 10. The compressed air in the compressed air storage tank 8 will enter the bags through the air backwashing port 16, forming an air wave, thus causing a strong dust cleaning effect and shaking off the dust on the bags.

[0030] Further, in this embodiment, a second screw conveyor 14 is further included. The feed inlet of the second screw conveyor 14 is connected to the large particle material outlet of the vibrating screen 2. The discharge outlet of the second screw conveyor 14 is connected to the feed inlet of the bucket elevator 4. A plurality of crushing knives 15 are provided on the inner wall of the second screw conveyor 14. The plurality of crushing knives 15 are not arranged in parallel. The large particle materials processed by the vibrating screen 2 enter the second screw conveyor 14 and are preliminarily crushed under the combined action of the screw conveyor and the crushing knives 15 of the second screw conveyor 14, and then enter the swing granulator 3 through the bucket elevator 4 for further crushing treatment, further improving the yield of potassium dihydrogen phosphate products.

[0031] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for improving the yield of potassium dihydrogen phosphate, characterized in that: It includes a dryer, a vibrating screen, a rocking granulator, a bucket elevator, a first screw conveyor, and a finished product silo; the discharge port of the dryer is communicated with the feed port of the vibrating screen, the small particle outlet of the vibrating screen is communicated with the finished product silo, the large particle outlet of the vibrating screen is communicated with the feed port of the rocking granulator through the bucket elevator, and the discharge port of the rocking granulator is communicated with the finished product silo through the first screw conveyor.

2. The device for improving the yield of potassium dihydrogen phosphate according to claim 1, wherein: It further includes a bag filter, the air inlet of the bag filter is communicated with the dryer, the discharge port of the bag filter is communicated with the feed port of the vibrating screen, and the air outlet of the bag filter is communicated with a draft fan through a pipeline.

3. The device for improving the yield of potassium dihydrogen phosphate according to claim 1, characterized in that: The dryer is a vibrating fluidized bed.

4. The device for improving the yield of potassium dihydrogen phosphate according to claim 1, characterized in that: The vibrating screen is a circular rocking screen.

5. The device for improving the yield of potassium dihydrogen phosphate according to claim 1, characterized in that: It further includes a second screw conveyor, the feed port of the second screw conveyor is communicated with the large particle material outlet of the vibrating screen, and the discharge port of the second screw conveyor is communicated with the feed port of the bucket elevator; a plurality of crushing knives are provided on the inner wall of the second screw conveyor.

6. The device for improving the yield of potassium dihydrogen phosphate according to claim 5, characterized in that: The plurality of crushing knives are not arranged in parallel.

7. The device for improving the yield of potassium dihydrogen phosphate according to claim 2, characterized in that: An air backwashing mechanism is further provided on the bag filter, the air backwashing mechanism includes a compressed air storage tank, the compressed air storage tank is communicated with the bags inside the bag filter through an air blowing pipe, and an electromagnetic pulse control valve is provided on the air blowing pipe.

8. The device for improving the yield of potassium dihydrogen phosphate according to claim 7, wherein: The air blowing pipe is provided with an air backwashing port on the side facing the bags of the bag filter.

9. The device for improving the yield of potassium dihydrogen phosphate according to claim 7, characterized in that: A differential pressure sensor is provided on the pipeline where the cleaning chamber of the bag filter is communicated with the ash hopper, and the differential pressure sensor is interlocked with the electromagnetic pulse control valve.

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