CN110090596B - Inclined surface cooling granulation method and fertilizer granules thereof - Google Patents
Inclined surface cooling granulation method and fertilizer granules thereof Download PDFInfo
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- CN110090596B CN110090596B CN201810095162.6A CN201810095162A CN110090596B CN 110090596 B CN110090596 B CN 110090596B CN 201810095162 A CN201810095162 A CN 201810095162A CN 110090596 B CN110090596 B CN 110090596B
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- 238000001816 cooling Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000003337 fertilizer Substances 0.000 title claims abstract description 35
- 238000005469 granulation Methods 0.000 title claims abstract description 28
- 230000003179 granulation Effects 0.000 title claims abstract description 28
- 239000008187 granular material Substances 0.000 title claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 129
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 239000007921 spray Substances 0.000 claims abstract description 41
- 239000002245 particle Substances 0.000 claims abstract description 25
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 abstract description 6
- 230000003068 static effect Effects 0.000 description 11
- 239000000203 mixture Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention provides a method for cooling and granulating an inclined plane, which comprises the following steps: introducing the molten slurry with pressure into a spray head through a feed pipe, spraying the molten slurry from the spray head to form liquid drop-shaped slurry, and enabling the molten slurry to be ejected at an angle with the horizontal direction by the spray head; the liquid drop-shaped slurry falls onto the inclined plane of the inclined plane cooling equipment and rolls, the liquid drop-shaped slurry is cooled in the rolling process and forms fertilizer particles, and the included angle between the direction of the liquid drop-shaped slurry falling onto the inclined plane and the inclined plane of the inclined plane cooling equipment is 0-15 degrees. The invention provides a slope cooling granulation method, which utilizes a spray head to spray inclined liquid drop-shaped slurry, and enables the liquid drop-shaped slurry to roll, cool and granulate on the slope of slope cooling equipment. This not only greatly reduces the height of the prilling tower, but also reduces the cost. And because the liquid drop-shaped slurry is cooled in rolling, the fertilizer particles have good sphericity, uniformity and compactness and strong practicability.
Description
Technical Field
The invention belongs to the technical field of fertilizer granule manufacturing, and particularly relates to a method for inclined surface cooling granulation and fertilizer granules thereof.
Background
The existing production method of compound fertilizer mainly includes high tower granulation, spray granulation, disc granulation and the like. The problems of high tower granulation are high facility cost, complex structure of process equipment, complex operation, suitability for high capacity, low cost performance, inflexible production change and easy waste formation. High tower granulation investment cost is high, and the civil engineering and equipment investment of a tower needs about 3000 ten thousand yuan, and the floor area is large, needs about 3 mu of land, and has a complex structure. The appearance of the product of the spray granulation and the disc granulation is not smooth enough, the nutrient of the granules is not uniform, and the rear section needs to be dried, thus wasting energy.
In the prior art, patent No. CN201610475289.1 provides a compound fertilizer granulation method using a combined spray granulation tower, which comprises the following steps: mixing the small granular material with the fused slurry A to form a feed liquid, mixing the feed liquid with gas to form a gas-liquid mixture, spraying the gas-liquid mixture into a first granulation tower, mixing the primary finished granular fertilizer with the fused slurry B to form the feed liquid, mixing the feed liquid with the gas to form a gas-liquid mixture, and spraying the gas-liquid mixture into a second granulation tower, wherein the spraying angle is 0-90 degrees to the horizontal plane, and the spraying direction is upward to the horizontal plane. The above method is only suitable for spray granulation and not for bevel cooling granulation. Thus, the prior art lacks a method of granulation by bevel cooling.
Disclosure of Invention
In view of the above, the present invention provides a method for slope cooling granulation, in which a nozzle is used to spray liquid droplet-shaped slurry obliquely, and the liquid droplet-shaped slurry falls on the slope of a slope cooling device to roll, cool and granulate.
The invention provides a method for cooling and granulating an inclined plane, which comprises the following steps:
introducing molten slurry with pressure into a spray head through a feed pipe, wherein the molten slurry is sprayed out of the spray head to form liquid drop-shaped slurry, and the spray head can enable the molten slurry to be ejected at an angle with the horizontal direction;
the liquid drop-shaped slurry falls on the inclined plane of the inclined plane cooling equipment and rolls, the liquid drop-shaped slurry is cooled in the rolling process to form fertilizer particles, and the included angle between the direction of the liquid drop-shaped slurry falling on the inclined plane and the inclined plane of the inclined plane cooling equipment is 0-15 degrees.
Wherein the molten slurry is ejected at an angle of 30-80 degrees from the horizontal.
Wherein the inclined plane of the inclined plane cooling equipment is arranged at an angle of 30-80 degrees with the horizontal direction.
Wherein, the distance between the spray head and the bevel cooling device is 50-500 mm.
Wherein the pressure of the molten slurry is 0.3-1.6 MPa.
Wherein the length of the inclined surface cooling equipment is 5-60 m.
Wherein, the shower nozzle include the rotating ring, nested in the interior quiet shower nozzle of rotating ring, set up in the transmission shaft of rotating ring one side and with the inlet pipe that quiet shower nozzle one end is connected, the array hole has been seted up on the lateral wall of rotating ring, the rotating ring be used for along the center pin for quiet shower nozzle rotates, the rotating ring still is used for cutting off the follow at the rotation in-process quiet shower nozzle spun ground paste makes it become the liquid droplet form, including the nozzle that at least one row of interval set up on the quiet shower nozzle, the nozzle half nested in the lateral wall of quiet shower nozzle, and towards adjacent the rotating ring lateral wall direction is outstanding, the nozzle is equipped with a through-hole, the through-hole with the hole one-to-one sets up.
The area of the cross section of the through hole is smaller than that of the cross section of the hole, the cross sections of the hole and the through hole are circular, the diameter of the through hole is 1-5mm, and the diameter of the hole is 5-20 mm.
Wherein, the distance between the nozzle and the side wall of the moving ring is 3-100 mm.
In the method for inclined surface cooling granulation provided by the first aspect of the invention, the molten slurry with pressure is ejected from the nozzle in a nearly straight line form, and after being ejected from the nozzle, the slurry is formed into a liquid drop-shaped slurry. The included angle between the direction of the liquid drop-shaped slurry falling into the inclined plane and the inclined plane of the inclined plane cooling equipment is 0-15 degrees, so that the liquid drop-shaped slurry can continuously roll when falling onto the inclined plane of the inclined plane cooling equipment and is cooled into fertilizer particles in the rolling process. The invention provides a slope cooling granulation method, which utilizes a spray head to spray inclined liquid drop-shaped slurry, and enables the liquid drop-shaped slurry to roll, cool and granulate on the slope of slope cooling equipment. This not only greatly reduces the height of the prilling tower, but also reduces the cost. And because the liquid drop-shaped slurry is cooled in rolling, the fertilizer particles have good sphericity, uniformity and compactness and strong practicability.
In a second aspect, the invention provides a fertilizer granule prepared by the method of the first aspect of the invention.
The fertilizer particles provided by the second aspect of the invention are prepared by the method provided by the first aspect of the invention, and have the advantages of good sphericity, uniformity, compactness and strong practicability.
Drawings
In order to more clearly illustrate the technical solution in the embodiment of the present invention, the drawings required to be used in the embodiment of the present invention will be described below.
FIG. 1 is a schematic process diagram of a bevel cooling granulation process in an embodiment of the present invention;
FIG. 2 is a process flow diagram of a method of bevel cooling granulation in an embodiment of the present invention;
FIG. 3 is a schematic view of the showerhead of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the bevel cooling apparatus of FIG. 1;
FIG. 5 is a schematic structural view of the bevel cooling apparatus of FIG. 1;
fig. 6 is a partial enlarged view of the ramp of fig. 4.
Detailed Description
The following is a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements are also considered to be within the scope of the present invention.
The bevel cooling granulation method provided by the embodiment of the invention comprises the following steps:
step 1: introducing a molten slurry with pressure into a spray head 100 through a feed pipe, wherein the molten slurry is sprayed out of the spray head 100 to form a liquid droplet-shaped slurry 3, and the spray head 100 can eject the molten slurry at an angle to the horizontal direction;
step 2: the liquid drop-shaped slurry 3 falls onto the inclined plane 41 of the inclined plane cooling device 200 and rolls, the liquid drop-shaped slurry 3 is cooled and forms fertilizer particles in the rolling process, wherein the included angle between the direction of the liquid drop-shaped slurry falling onto the inclined plane 41 and the inclined plane 41 of the inclined plane cooling device 200 is 0-15 degrees.
The fused slurry refers to a fertilizer slurry formed by mixing one or more of a nitrogenous fertilizer, a phosphate fertilizer, a potash fertilizer, a medium trace element fertilizer, an organic carbon fertilizer, a microbial fertilizer and the like, wherein the mixing mode can be primary mixing, secondary mixing, tertiary mixing and the like, and it can be understood that the conditions of the mixing sequence, the temperature, the pH value and the like of the fertilizer slurry are not limited and can be adjusted according to the characteristics of the raw material components of the fertilizer slurry and the mixing requirements.
In the method for inclined surface cooling granulation according to the embodiment of the present invention, the molten slurry having a pressure is ejected from the nozzle 100 in a nearly linear form due to the presence of the pressure, and the droplet-shaped slurry 3 is formed after being ejected from the nozzle 100. Wherein the included angle between the direction of the liquid-drop-shaped slurry falling on the inclined surface 41 and the inclined surface 41 of the inclined surface cooling device 200 is 0-15 deg. Preferably, the angle between the ejection direction of the molten slurry and the inclined surface 41 of the inclined surface cooling device 200 is 0-10 °. The rolling is continued when the slurry 3 in the form of droplets falls on the inclined surface 41 of the inclined surface cooling device 200 and is cooled into fertilizer granules during the rolling. Therefore, in the method for cooling and granulating the inclined surface 41 provided by the invention, the inclined liquid droplet-shaped slurry 3 is sprayed by the spray head 100, and the liquid droplet-shaped slurry 3 is rolled, cooled and granulated on the inclined surface 41 of the inclined surface cooling device 200, so that the height of a granulating tower is greatly reduced, the occupied area of the land is reduced, and the cost is reduced. And because the liquid drop-shaped slurry 3 is cooled in rolling, the sphericity of the fertilizer particles is better, the uniformity is better, the compactness is better, and the practicability is very strong.
The direction of the molten slurry ejection is at an angle to the horizontal, wherein the angle can be adaptively adjusted according to the characteristics of the molten slurry and the pressure of the discharged material.
In the embodiment of the present invention, the spray head 100 includes a moving ring 1, a static spray head 2 nested in the moving ring 1, a transmission shaft disposed on one side of the moving ring 1, and a feeding pipe (not shown in the drawings) connected to one end of the static spray head 2, the transmission shaft is configured to drive the moving ring 1 to rotate (as shown by an arrow in fig. 3), an array of holes 11 is disposed on a sidewall of the moving ring 1, the moving ring 1 is configured to rotate relative to the static spray head 2 along a central axis, the moving ring 1 is further configured to cut off slurry sprayed from the static spray head 2 during rotation and make the slurry into a liquid droplet shape, the static spray head 2 includes at least one row of nozzles 21 disposed at intervals, the nozzles 21 are semi-nested in a sidewall of the static spray head 2 and protrude toward a sidewall of the adjacent moving ring 1, the nozzles 21 are provided with a through hole 211, the through holes 211 and the holes 11 are arranged in a one-to-one correspondence manner, and the nozzles 21 are arranged at an angle of 30-80 degrees along the horizontal direction.
First, the side wall of the moving ring 1 is provided with the array holes 11, the static nozzle 2 is used for continuously spraying slurry towards the through holes 211 of the nozzle 21, and the moving ring 1 is used for rotating relative to the static nozzle 2 along the central axis. Therefore, the rotating ring 1 continuously cuts the slurry discharged from the static head 2 into a droplet state during rotation, thereby forming a droplet-like slurry 3.
Secondly, the nozzles 21 are arranged at 30 to 80 degrees in the horizontal direction. The slurry ejected from the nozzles 21 is inclined and the slurry 3 in the form of droplets cut by the driven ring 1 is also inclined, i.e. at 30-80 deg. horizontally. The slurry 3 in the form of inclined droplets also continues in the direction of inclination while falling. This not only shortens the height of the prilling tower, but also the longer fall time allows better cooling of the droplet-like slurry 3. When the inclined droplet-like slurry 3 lands on the surface of the bevel cooling device 200, the angle between the falling direction of the droplet-like slurry 3 and the bevel 41 of the bevel cooling device 200 is small, and thus the impact force is also small. This makes it possible to maintain a good sphericity of the slurry 3 in the form of droplets and to form a component force rolling in the direction of the inclined surface 41, thereby preventing the slurry 3 in the form of droplets from sticking to the inclined surface cooling apparatus 200.
Preferably, the head 100 is used to eject the liquid droplet-like slurry 3 which is generated in different directions, the liquid droplet-like slurry 3 ejected at an angle to the horizontal direction, and the liquid droplet-like slurry 3 ejected vertically downward. The slurry 3 in the form of droplets ejected at an angle to the horizontal direction falls on the inclined surface 41 of the inclined surface cooling apparatus 200 and is rolled, cooled and granulated. And the slurry 3 in the form of droplets ejected vertically downward is cooled and granulated while falling.
Specifically, in the present invention, when the slurry continuously ejected from the static nozzle 2 is ejected to the holes 11 on the side wall of the moving ring 1, the slurry is cut off to form the liquid droplet-shaped slurry 3; when the slurry continuously sprayed from the static spray head 2 is sprayed onto the side wall of the movable ring 1, the slurry will fall vertically due to gravity, and the vertically falling slurry will be dispersed in the falling process to form the liquid-drop-shaped slurry 3. While the liquid-drop-like slurry 3 will cool down into fertilizer granules during the fall and fall into the collection tank 6. The head 100 of the present invention ejects the slurry 3 in the form of inclined droplets and the slurry falling vertically.
In the embodiment of the present invention, the cooling device includes a collecting tank 6 and at least one set of cooling ramps 4 and collecting ramps 5, one side of the collecting ramps 5 is connected to the cooling ramps 4, the other side of the collecting ramps 5 opposite to the collecting tank 6 is connected to the collecting tank 6, the collecting ramps 5 are used for receiving granular objects falling from the cooling ramps 4 and enabling the granular objects to roll down from the collecting ramps 5 to the collecting tank 6, the collecting tank 6 is provided with a cold air pipe 7, and the cold air pipe 7 is used for blowing cold air (as shown by arrow directions in fig. 4 and 5) from the collecting tank 6 to the cooling ramps.
When the liquid droplet-shaped fertilizer slurry or the liquid droplet-shaped fertilizer slurry falls to the cooling ramp 4. First, the slurry will roll along the ramp 41 of the cooling ramp 4 in the direction of the collection ramp 5. And the sphericity of the slurry is better in the rolling process of the slurry. Secondly, the slurry is cooled in the rolling process, and the slurry is cooled in the rolling process, so that the density of the particles formed by cooling is uniform and high. When the slurry cools to particles and falls to the collection ramp 5, the particles continue to roll down on the collection ramp 5 and cool further during the rolling process. Finally the granules fall into a collecting tank 6 to obtain fertilizer granules or fertilizer granules. Again, the slurry is rolled and cooled on the inclined surface 41, increasing the distance the slurry falls, which can greatly reduce the height of the prilling tower, which in turn reduces costs. The cooling equipment provided by the invention can well roll, cool and granulate the liquid-drop-shaped slurry 3 on the cooling inclined table 4 to form particles with spherical degree and good uniformity, and improve the comprehensive performance of the particles; the height of the granulation tower can be reduced, and the cost is saved.
The arrangement of the cold air pipe 7 can not only reduce the temperature in the granulation tower, but also cool the slurry into particles by cold air from the collecting tank 6 to the cooling ramp 4 when the slurry falls down from the vertical direction.
In an embodiment of the invention, the molten slurry is ejected at an angle of 30 ° to 80 ° from horizontal. When the angle between the molten slurry and the horizontal direction is less than 30 °, the slurry 3 in the form of droplets stops on the inclined surface 41, even sticks to the inclined surface 41, and does not roll further. When the angle between the molten slurry and the horizontal direction is greater than 80 °, the slurry 3 in the form of droplets may make a near-free-fall movement, and the bevel cooling device 200 may be disabled. Preferably, the molten slurry is ejected at an angle of 40 ° to 60 ° from horizontal.
In the embodiment of the present invention, the inclined plane 41 of the inclined plane cooling device 200 is disposed at an angle of 30 to 80 degrees with respect to the horizontal direction. When the inclined surface 41 of the cooling ramp 4 is below 30 ° in the horizontal direction, the slurry stops rolling because the slope of the inclined surface 41 is too small, and even the slurry sticks to the inclined surface 41. When the inclined surface 41 of the cooling ramp 4 is horizontally higher, the slurry falls too fast and the cooling time is too short, resulting in poor quality of the formed particles. Preferably, the inclined surface 41 of the inclined surface cooling device 200 is disposed at 40 to 60 degrees from the horizontal direction.
In the embodiment of the present invention, the distance between the spray head 100 and the bevel cooling device 200 is 50-500 mm. When the distance between the spray head 100 and the cooling device 200 is less than 50mm, the distance between the spray head 100 and the cooling device 200 is too small, and there is a risk of collision. When the distance between the spray head 100 and the bevel cooling device 200 is more than 500mm, the direction of the spray of the droplet-like slurry 3 is changed due to gravity. Preferably, the spray head 100 is located 100-300mm from the bevel cooling device 200.
In an embodiment of the present invention, the pressure of the molten slurry is 0.3 to 1.6 MPa. When the pressure of the molten material slurry is 0.3 to 1.6MPa, the molten material slurry is ejected in a nearly linear form.
In the embodiment of the present invention, the length of the inclined plane 41 of the inclined plane cooling device 200 is 5 to 60 m. When the length of the inclined surface 41 of the cooling ramp 4 is less than 5m, the slurry is cooled for too short a time because the length of the inclined surface 41 is too short, resulting in poor quality of the formed particles. When the length of the inclined surface 41 of the cooling ramp 4 is greater than 60m, the length of the inclined surface 41 is too long, which increases the height of the prilling tower and the land occupation area. Ultimately resulting in a dramatic increase in cost.
In the embodiment of the present invention, the area of the cross section of the through hole 211 is smaller than the area of the cross section of the hole 11, the cross sections of the hole 11 and the through hole 211 are circular, the diameter of the through hole 211 is 1-5mm, and the diameter of the hole 11 is 5-20 mm. Preferably, the diameter of the through hole 211 is 2-4mm, and the diameter of the hole 11 is 8-15 mm.
In the embodiment of the invention, the distance between the nozzle 21 and the side wall of the movable ring 1 is 3-100 mm. When the distance between the nozzle 21 and the side wall of the moving ring 1 is less than 3mm, the nozzle 21 may collide with the side wall of the moving ring 1, and when the distance between the nozzle 21 and the side wall of the moving ring 1 is greater than 100mm, the distance between the nozzle 21 and the side wall of the moving ring 1 is too large, and slurry falls down due to gravity, thereby changing the direction. Preferably, the distance between the nozzle 21 and the side wall of the moving ring 1 is 15mm-80mm, and more preferably, the distance between the nozzle 21 and the side wall of the moving ring 1 is 30mm-50 mm.
In the embodiment of the present invention, the inclined surface 41 of the cooling ramp 4 is formed by sequentially overlapping a plurality of plates, the nth plate is stacked on the (n + 1) th plate, the nth plate and the (n + 1) th plate are staggered, wherein the nth plate is far away from the connection between the cooling ramp 4 and the collection ramp 5, the (n + 1) th plate is close to the connection between the cooling ramp 4 and the collection ramp 5, and n is an integer greater than 0. The inclined plane 41 is formed by overlapping a plurality of plates in sequence, so that the damage of expansion with heat and contraction with cold caused by splicing can be avoided to a great extent.
Referring to fig. 3, in the embodiment of the present invention, an overlapping portion is formed at an overlapping portion between the plate and the plate, and the overlapping portion is a concave arc structure 43. The plate far away from the joint of the cooling sloping platform 4 and the collecting sloping platform 5 is arranged above the plate near the joint of the cooling sloping platform 4 and the collecting sloping platform 5, and the overlapping part is of a concave arc structure 43. Therefore, when the droplet-like slurry 3 rolls down to the concave-arc structure 43, a component force parallel to the downward direction of the inclined surface 41 and a component force perpendicular to the downward direction of the inclined surface 41 are generated in the droplet-like slurry 3, and the droplet-like slurry 3 is accelerated and rolls against the inclined surface 41. This prevents the problem of the liquid droplet-like slurry 3 flying out of the slurry during the fall.
In the embodiment of the present invention, the cooling ramp 4 is provided with a through hole 211 at the joint of the cooling ramp 4 and the collecting ramp 5, and the through hole 211 is used for rolling down the granular objects from the collecting ramp 5 to the collecting tank 6. After the cooled and formed particles have rolled down from the cooling ramp 4 to the collecting ramp 5, the particles will roll down from the collecting ramp 5 via the cooling ramp 4 to the collecting tank 6. The connection between the cooling ramp 4 and the collection ramp 5 is therefore provided with through holes 211, which allow the particles to pass well through the cooling ramp 4 and to roll on the collection ramp 5.
In the embodiment of the present invention, the inclined surface 41 of the cooling ramp 4 is provided with a hydrophobic layer 42, and the material of the hydrophobic layer 42 includes one or more of teflon and fluorine resin. The water-repellent layer 42 is provided on the inclined surface 41 of the cooling ramp 4, and prevents the slurry from sticking to the inclined surface 41 of the cooling ramp 4, and the slurry can be favorably rolled off the inclined surface 41. The hydrophobic layer 42 can prevent dust and impurities in the air from falling on the inclined surface 41, and the purity of the particles is improved.
In the embodiment of the present invention, the cooling ramp 4 and the collection ramp 5 further include a cooling device 8, and the cooling device 8 makes the temperature of the inclined surface 41 be (-20) DEG C-20 ℃. The cooling device 8 is arranged to lower the temperature of the surfaces of the cooling ramp 4 and the collection ramp 5 and to maintain the temperature of the surfaces of the cooling ramp 4 and the collection ramp 5 at (-20) c-20 c. The cooling device 8 is arranged to accelerate the cooling of the slurry into granules and to improve the quality of the granules.
The fertilizer particles provided by the embodiment of the invention are prepared by the method provided by the embodiment of the invention.
The fertilizer particles provided by the embodiment of the invention are prepared by the method provided by the embodiment of the invention, and the fertilizer particles have the advantages of good sphericity, uniformity and compactness and strong practicability.
The foregoing detailed description is provided for the purposes of illustrating the embodiments of the present invention, and is provided for the purposes of illustrating the principles and embodiments of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method of bevel cooling granulation, characterized in that it comprises the steps of:
introducing molten slurry with pressure into a spray head through a feed pipe, wherein the molten slurry is sprayed out of the spray head to form inclined liquid drop-shaped slurry and vertically falling slurry, and the spray head can enable the molten slurry to be ejected at an angle with the horizontal direction to form the liquid drop-shaped slurry;
the liquid drop-shaped slurry falls onto the inclined plane of the inclined plane cooling equipment and rolls, the liquid drop-shaped slurry is cooled in the rolling process and forms fertilizer particles, and the included angle between the direction of the liquid drop-shaped slurry falling onto the inclined plane and the inclined plane of the inclined plane cooling equipment is 0-15 degrees;
the vertically falling slurry falls into a collecting tank of the inclined plane cooling equipment, and the vertically falling slurry is cooled by cold air blown out from the collecting tank to the direction of the spray head by a cold air pipe of the collecting tank in the falling process to form fertilizer particles
Wherein; the shower nozzle include the rotating ring, the nestification in the intra-annular quiet shower nozzle of rotating, the array hole has been seted up on the lateral wall of rotating ring, the rotating ring be used for along the center pin for quiet shower nozzle rotates, the rotating ring still is used for cutting off the follow at the rotation in-process quiet shower nozzle spun ground paste makes it the drop form, including the nozzle that at least one row interval set up on the quiet shower nozzle, the nozzle half nestification in the lateral wall of quiet shower nozzle to adjacent the rotating ring lateral wall direction is outstanding, the nozzle is equipped with a through-hole, the through-hole with the hole one-to-one sets up.
2. The method of claim 1, wherein the molten slurry is ejected at an angle of from 30 ° to 80 ° from horizontal.
3. The method of claim 1, wherein the bevel of the bevel cooling device is positioned at an angle of 30 ° to 80 ° from horizontal.
4. The method of claim 1, wherein the spray head is positioned 50-500mm from the bevel cooling apparatus.
5. The method of claim 1, wherein the pressure of the molten slurry is in the range of 0.3 MPa to 1.6 MPa.
6. The method of claim 1, wherein the bevel cooling device has a bevel length of 5-60 m.
7. The method of claim 1, wherein the spray head further comprises a drive shaft disposed on one side of the rotating ring and a feed tube connected to one end of the stationary spray head.
8. The method of claim 7, wherein the cross-sectional area of the through-hole is smaller than the cross-sectional area of the hole, the cross-sectional shapes of the hole and the through-hole are circular, the diameter of the through-hole is 1-5mm, and the diameter of the hole is 5-20 mm.
9. The method of claim 7, wherein the distance between the nozzle and the sidewall of the rotating ring is 3-100 mm.
10. A fertilizer granule produced by the method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095162.6A CN110090596B (en) | 2018-01-30 | 2018-01-30 | Inclined surface cooling granulation method and fertilizer granules thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095162.6A CN110090596B (en) | 2018-01-30 | 2018-01-30 | Inclined surface cooling granulation method and fertilizer granules thereof |
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| JP2002115840A (en) * | 2000-10-06 | 2002-04-19 | Tokyo Kozai Kk | Method of controlling generated slag of waste |
| CN1400073A (en) * | 2001-07-26 | 2003-03-05 | 球状粉末体工业公司 | Pellet producing apparatus |
| CN1636900A (en) * | 2003-12-22 | 2005-07-13 | 株式会社小原 | Globular glass manufacturing apparatus and method for manufacturing the globular glass |
| CN1762564A (en) * | 2005-09-09 | 2006-04-26 | 孔亦周 | Granulation spray nozzle differential rotating granulation |
| CN1890409A (en) * | 2004-04-21 | 2007-01-03 | 京半导体股份有限公司 | Dropping pipetype granular crystal manufacturing apparatus and granular crystal manufacturing method |
| CN104258782A (en) * | 2014-09-29 | 2015-01-07 | 国药嘉远国际贸易公司 | Spraying and fluidizing granulation tower for manufacturing hollow iodine granules and iodine |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002115840A (en) * | 2000-10-06 | 2002-04-19 | Tokyo Kozai Kk | Method of controlling generated slag of waste |
| CN1400073A (en) * | 2001-07-26 | 2003-03-05 | 球状粉末体工业公司 | Pellet producing apparatus |
| CN1636900A (en) * | 2003-12-22 | 2005-07-13 | 株式会社小原 | Globular glass manufacturing apparatus and method for manufacturing the globular glass |
| CN1890409A (en) * | 2004-04-21 | 2007-01-03 | 京半导体股份有限公司 | Dropping pipetype granular crystal manufacturing apparatus and granular crystal manufacturing method |
| CN1762564A (en) * | 2005-09-09 | 2006-04-26 | 孔亦周 | Granulation spray nozzle differential rotating granulation |
| CN104258782A (en) * | 2014-09-29 | 2015-01-07 | 国药嘉远国际贸易公司 | Spraying and fluidizing granulation tower for manufacturing hollow iodine granules and iodine |
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