CN211921348U

CN211921348U - Mineral source soil conditioner granulation process system

Info

Publication number: CN211921348U
Application number: CN202020475282.1U
Authority: CN
Inventors: 秦中华; 梁世栋; 王秀龙; 高为民
Original assignee: Tianjin Cement Industry Design and Research Institute Co Ltd
Current assignee: Tianjin Cement Industry Design and Research Institute Co Ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-11-13
Anticipated expiration: 2030-04-02

Abstract

The utility model relates to a mineral source soil conditioner granulation process systems comprises storing storehouse, powerful granulator, drying-machine, shale shaker and breaker of mixing, store storehouse, powerful granulator, drying-machine and the shale shaker of mixing and link to each other the setting in order, it includes that likepowder mineral fertilizer stores storehouse and granulation additive and stores the storehouse to store the storehouse, powerful granulator and spraying system of mixing links to each other, the coarse grain export of shale shaker links to each other with powerful granulator pan feeding mouth through the breaker, the fine grain export of shale shaker links to each other with powerful granulator pan feeding mouth of mixing, powerful granulator of mixing includes the granulator barrel, be equipped with agitating unit and scraper in the granulator barrel. The utility model discloses only adopt powerful mixed granulator can accomplish material mixture, granulation simultaneously, cancelled disc granulation, wet screening equipment, and reduce drying equipment, optimized system process flow.

Description

Mineral source soil conditioner granulation process system

Technical Field

The utility model belongs to the technical field of the granulation, especially, relate to a mineral source soil conditioner granulation process systems.

Background

The silicon-calcium-potassium-magnesium fertilizer is a novel mineral source soil conditioner which is prepared by taking natural minerals such as potassium feldspar, dolomite, limestone and the like as main raw materials and calcining the natural minerals at high temperature, and the main nutritional components of the silicon-calcium-potassium-magnesium fertilizer are effective silicon oxide, effective calcium oxide, effective potassium oxide, effective magnesium oxide and the like which can be absorbed by plants.

With the use of a large amount of nitrogen, phosphorus and potassium fertilizers, the imbalance of secondary elements (calcium, magnesium, sulfur and silicon) and trace elements (zinc, copper, iron, molybdenum, manganese, boron and the like) in soil is becoming more and more serious. Meanwhile, the demand of the round particle mineral source soil conditioner is increasingly vigorous due to the improvement and popularization of the recognition degree of balanced fertilization and the requirement of mechanized fertilization in society.

The existing mineral source soil conditioner granulation process system in the market is basically a process system which adopts a single-shaft stirrer for mixing, disc granulation, wet particle screening, rotary/fluidized bed two-stage drying, rotary cooling and finished product screening. In the actual use process, the existing granulation process system has the following problems:

the finished product has low particle strength and large fluctuation, the particle crushing condition is serious in the drying and screening processes, the pulverization rate is high, and the relevant requirements of the national standard cannot be met; the pelletizing process has complicated system flow and large equipment investment.

Secondly, the balling rate is low, the moisture content is high, and the circulating load and the drying heat load of the screening equipment are increased.

Materials are not mixed uniformly, the use proportion of the granulating additive is high, the materials are easy to adhere to the side wall or the bottom of the cylinder body of the stirrer, and the self-cleaning function is not realized; not only increases the cost, but also obviously reduces the content of effective elements in the finished product.

Fourthly, the degree of automation is low, the labor cost is high and the labor intensity is high.

Fifthly, in the open granulation process, the dust is large, the production environment is poor, and the environmental protection requirement cannot be met.

Sixthly, the wet particle drum screen has poor screening effect, and the screening purpose cannot be achieved particularly in cold areas.

Disclosure of Invention

The utility model discloses a solve the problem that exists among the prior art, provide one kind and can improve finished product granule quality, improve granulation balling-up rate and stability, reduce additive and add proportion, system intelligent degree height, production environment good, the mineral source soil conditioner granulation process systems that process flow is simple relatively.

The utility model discloses a realize like this, a mineral source soil conditioner granulation process systems, by storing storehouse, powerful granulator, drying-machine, shale shaker and breaker constitution of mixing, store storehouse, powerful granulator, drying-machine and the shale shaker and link to each other the setting in order of mixing, it includes that likepowder mineral fertilizer stores storehouse and granulation additive storage storehouse to store the storehouse, powerful granulator links to each other with the water-spraying system, the coarse grain export of shale shaker links to each other with powerful granulator pan feeding mouth through the breaker, the fine grain export of shale shaker links to each other with powerful granulator pan feeding mouth of mixing, powerful granulator includes the granulator barrel, be equipped with agitating unit and scraper in the granulator barrel.

In the above technical scheme, preferably, the stirring device includes a stirring shaft and stirring blades equidistantly and staggeredly distributed along the axial direction of the stirring shaft, the stirring blades are arc-shaped, an included angle is formed between the stirring blades and the stirring shaft, and the included angle is 50-60 °.

In the above technical solution, preferably, the scraper includes a wall scraper disposed on a side wall of the barrel body of the pelletizer and a bottom scraper disposed at a bottom of the barrel body of the pelletizer.

In the above technical solution, preferably, a gas inlet of the dryer is connected to a kiln tail exhaust gas pipeline and/or a hot blast stove of the firing system.

In the above technical scheme, preferably, the gas outlet of the dryer and the gas outlet of the vibrating screen are both connected with a dust collector.

Compared with the existing mineral source soil conditioner granulation process system in the market, the invention only adopts strong mixing granulation, and has the advantages that:

the powerful mixing granulator can complete material mixing and granulation simultaneously, and simplifies the process flow of the system.

And secondly, disc granulation and wet screening equipment are omitted, drying equipment is reduced, and the process flow of the system is optimized. The pelletizing rate of the strong mixing pelletizer is high, the one-time pelletizing rate reaches more than 85-90%, and the pelletizing machine can be directly put into a dryer for drying without adding disc pelletizing and wet screening equipment. Meanwhile, the moisture of the wet granules is only 10-12 percent and is 2-3 percent lower than that of the disc granulation process, and the wet granules can be dried in one section without two-section or three-section drying.

The test result shows that the granulation process system can achieve the same granulation effect, and the use proportion of the granulation additive can be reduced by 5-10%. Compared with the traditional single-shaft stirring and mixing, the powerful mixing granulator utilizes the rotating cylinder and the stirring device with the highest rotating speed of 5000r/min to ensure that the materials are subjected to the most violent mixing motion in the mixing granulator, the mixing uniformity is increased, and the use proportion of the granulating additive is reduced. And the wall scraper and the bottom scraper in the strong mixing granulator can help 100% of materials to participate in mixing and have a self-cleaning effect, and the mixing effect is better.

And fourthly, the mixing uniformity is increased, the particle strength is improved, the stability of the particle strength is improved, and the circulation quantity is reduced.

The intelligent degree is high, the labor cost is low, the dust is less, and the production environment is good. The powdery mineral fertilizer is granulated in a completely closed strong mixing granulator in batches without dust. Meanwhile, the feeding amount and the water spraying amount are both intelligently controlled, the influence of human factors is reduced, and the quality of finished products is stable.

The utility model has the advantages and positive effects that:

1. the utility model discloses only adopt powerful mixed granulator can accomplish material mixture, granulation simultaneously, cancelled disc granulation, wet screening equipment, and reduce drying equipment, optimized system process flow.

2. The utility model discloses a powerful granulator that mixes for the likepowder material mixes the degree of consistency and increases, has reduced the use proportion of granulation additive. Compared with the existing disc granulation, the proportion of the granulation additive can be reduced by 5-10%.

3. The arc-shaped stirring blade of the stirring device in the strong mixing granulator of the utility model ensures that the flow field in the granulator is more reasonable, the stirring and mixing are more uniform, and the installed power is lower; compared with a common strong mixing granulator, the energy is saved by 10 to 20 percent. And the scraper at the inner wall part of the cylinder body and the bottom scraper can enable 100 percent of materials to participate in mixing and play a self-cleaning role.

4. The granulation process system of the utility model has high intellectualization degree, less dust and good production environment; the strength of finished product particles is high, wherein the average strength of 3-5 mm particles reaches 15N, and is increased by 4-5N compared with the existing disk granulation; the average strength of 1-3 mm particles reaches 10N, and compared with the existing disc granulation, the average strength is improved by 2-4N.

Drawings

Fig. 1 is a flow chart of a mineral source soil conditioner granulation process system provided by an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of a powerful mixing granulator according to an embodiment of the present invention;

fig. 3 is a top view of a stirring device provided in an embodiment of the present invention;

FIG. 4 is a schematic layout of a stirring shaft and stirring blades provided in the embodiment of the present invention;

fig. 5 is a front view of a scraper blade provided by an embodiment of the present invention;

fig. 6 is a top view of a scraper blade provided by an embodiment of the present invention;

3 fig. 3 7 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 5 3. 3

In the figure: 1. a first storage bin; 2. a second storage bin; 3. a first screw conveyor; 4. a second screw conveyor; 5. a strong mixing granulator; 6. a first belt conveyor; 7. a dryer; 8. vibrating screen; 9. a crusher; 10. a dust collector; 11. a hot blast stove; 12. a spray system; 13. a granulator cylinder; 14. a stirring device; 14-1, stirring blades; 15. a scraper; 15-1, wall scrapers; 15-2, a bottom scraper; the dotted line with an arrow is the airflow direction; the solid line with arrows is the direction of flow.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:

referring to fig. 1 to 7, an embodiment of the present invention provides a mineral source soil conditioner granulation process system, which includes a storage bin, a powerful mixing granulator 5, a dryer 7, a vibrating screen 8 and a crusher 9, the storage bin, the powerful mixing granulator 5, the dryer 7 and the vibrating screen 8 are connected in sequence, the storage bins comprise a first storage bin 1 (namely a powdery mineral fertilizer storage bin) and a second storage bin 2 (namely a granulation additive storage bin), the strong mixing granulator 5 is connected with a spraying system 12, a coarse particle outlet of the vibrating screen 8 is connected with a feeding port of the strong mixing granulator 5 through a crusher 9, the fine particle outlet of the vibrating screen 8 is connected with the feeding port of the powerful mixing granulator 5, the powerful mixing granulator 5 comprises a granulator barrel 13, and a stirring device 14 and a scraper 15 are arranged in the granulator barrel 13.

In this embodiment, if the diameter of the barrel of the granulator is less than three meters, one stirring device may be arranged in the barrel of the granulator, and if the diameter of the barrel of the granulator is more than three meters, two stirring devices may be arranged in the barrel of the granulator to reduce the stress of the stirring blades; the stirring device 14 comprises a stirring shaft and stirring blades 14-1 which are equidistantly and alternately distributed along the axial direction of the stirring shaft, the stirring blades 14-1 are arc-shaped, and an included angle is formed between the stirring blades 14-1 and the stirring shaft and is 50-60 degrees. The arc-shaped stirring blades enable the flow field in the granulator to be more reasonable, the stirring and mixing to be more uniform, and the installed power to be lower. Compared with a common strong mixing granulator, the energy is saved by 10 to 20 percent.

The scrapers are welded on the top cover of the granulator cylinder, and the scrapers 15 comprise wall scrapers 15-1 arranged on the side wall of the granulator cylinder and a bottom scraper 15-2 arranged at the bottom of the granulator cylinder. The tool tips of the wall scraper and the bottom scraper point to the side wall and the bottom of the barrel body of the granulator respectively, the wall scraper and the bottom scraper can help 100% of materials to participate in mixing and play a self-cleaning role, and the mixing effect is better.

And a gas inlet of the dryer 7 is connected with a kiln tail waste gas pipeline of the firing system and/or the hot blast stove 11, so that the drying cost is low.

And a gas outlet of the dryer 7 and a gas outlet of the vibrating screen 8 are connected with the dust collector 10, so that the field dust collection effect is improved, ultra-clean emission is realized, and the environment protection is facilitated.

Referring to fig. 1, a powdered mineral fertilizer and a granulation additive are stored in a first storage bin 1 and a second storage bin 2, respectively, and fed into a powerful mixing granulator 5 in batches after being metered by a first screw conveyor 3 and a second screw conveyor 4. The stirring device 14 rotating at high speed provides the most intense mixing motion of the materials in the intensive mixing granulator 5. After uniform mixing, water is atomized by high-pressure gas in the spraying system 12 and then sprayed into the strong mixing granulator 5 for batch granulation, and finished product particles with the water content of 10-12% and the particle size of 1-5 mm are formed. The wet granules are discharged from a discharge port of the intensive mixing granulator 5 and are sequentially conveyed to a dryer 7 through a first belt conveyor 6 for drying. After drying, the dry particles are sent into a vibrating screen 8, and oversize products are the finished product round particle mineral source soil conditioner. Wherein, the granules with the grain diameter of less than 1mm are returned to the strong mixing granulator 5 again, and the granules with the grain diameter of more than 5mm are returned to the strong mixing granulator 5 after being crushed by the crusher 9.

The hot air used by the dryer 7 is supplied by kiln tail exhaust gas of the firing system, and the insufficient amount is supplied by the hot blast stove 11.

The wet air dried by the dryer 7 and the dust-containing gas of the vibrating screen 8 are discharged from a chimney after being dedusted by a dust collector 10.

When granulation is carried out, the method specifically comprises the following steps:

proportioning raw materials: the powdery mineral fertilizer and the granulation additive are respectively metered and proportioned according to a certain proportion.

Granulating process: the prepared mixed materials are conveyed to a strong mixing granulator 5 after being metered. In a completely closed granulator, the rotating speed of a stirring device 14 is adjusted to 4500-5000 r/min, and strong stirring and mixing are carried out for about 2 minutes. After stirring and mixing are finished, adjusting the rotating speed of a stirring device to 400-500 r/min, and intelligently and quantitatively spraying water to form uniform microparticles with the water content of 10-12% and the particle size of 0.2-0.5 mm, wherein the microparticle granulation time is about 2 minutes. After the micro-granulation of the material is completed, adjusting the rotating speed of a stirring device to 200-300 r/min, and gradually growing the particle size of the micro-particles to uniform particles with the particle size of 1-5 mm, wherein the particle size of 2-3 mm accounts for more than 85% of the finished product particles. In the whole granulation process, the material quantity and the water spraying quantity are intelligently controlled, the influence of human factors on the granulation process is reduced, and no dust pollution is caused.

Third, the dryer: the wet granules are sent into a dryer 7 for drying; the hot air used for drying by the dryer is supplied by kiln tail exhaust gas of the firing system and/or by the hot blast stove 11. The dust-containing gas dried by the dryer 7 is discharged after being dedusted by the dust collector 10.

Sieving finished products: and (4) feeding the dried granules into a vibrating screen 8, and obtaining oversize products, namely the finished product round granule mineral source soil conditioner. Wherein, the granules with the grain diameter of less than 1mm return to the strong mixing granulator again, and the granules with the grain diameter of more than 5mm return to the strong mixing granulator after being crushed.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a mineral source soil conditioner granulation process system, its characterized in that comprises storage storehouse, powerful granulator, drying-machine, shale shaker and breaker that mixes, storage storehouse, powerful granulator, drying-machine and shale shaker link to each other in order and set up, it includes that likepowder mineral fertilizer stores storehouse and granulation additive storage storehouse to store the storehouse, powerful granulator links to each other with the spraying system, the coarse grain export of shale shaker links to each other with powerful granulator pan feeding mouth through the breaker, the fine grain export of shale shaker links to each other with powerful granulator pan feeding mouth that mixes, powerful granulator includes the granulator barrel, be equipped with agitating unit and scraper in the granulator barrel.

2. The mineral source soil conditioner granulation process system according to claim 1, wherein the stirring device comprises a stirring shaft and stirring blades which are equidistantly and alternately distributed along the axial direction of the stirring shaft, the stirring blades are arc-shaped, an included angle is formed between each stirring blade and the stirring shaft, and the included angle is 50-60 degrees.

3. The mineral source soil conditioner granulation process system of claim 1, wherein the scrapers comprise a wall scraper disposed on a sidewall of the granulator barrel and a bottom scraper disposed at the bottom of the granulator barrel.

4. The mineral source soil conditioner granulation process system according to claim 1, wherein the gas inlet of the dryer is connected to a kiln tail exhaust gas pipeline and/or a hot blast stove of the firing system.

5. The mineral source soil conditioner granulation process system of claim 1, wherein the gas outlet of the dryer and the gas outlet of the vibrating screen are both connected to a dust collector.