CN208732962U - A kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device - Google Patents

Abstract

The utility model relates to a kind of film-coated controlled release fertilizer fertilizer slug particle surface modification devices, including roller and positioned at the material feeding box of the roller feed end, it is installed with the hot gas inlet pipe being connected to drums inside on the material feeding box and extends to the feed pipe in the roller, the spiral shovelling plate for pushing material mobile to discharge end is installed in the roller.Become smooth rounding using the fertile slug particle surface that the utility model obtains, without obvious protrusion, significantly improve fertile slug particle compost density, roundness, fluidity, reduce fertile slug particle specific surface area, voidage and coated fertilizer dosage, more same nutrient controlled release phase film-coated controlled release fertilizer significantly reduces coating dosage, significantly extend fertilizer releasing period under the conditions of year-on-year equal coating quantities, solves key issues of there are membrane material nutrient controlled release precision is low, and coated fertilizer dosage is big, at high cost, industrialization promotion is difficult in current slow-release or control-release fertilizer industry to reduce production cost.

Description

A kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device

Technical field

The utility model relates to the processing of coating slowly/controlled releasing fertilizer and manufacturing field more particularly to a kind of coating are slow Release and release control fertilizer fertilizer slug particle surface modification device.

Background technique

Chemical fertilizer is can to provide nutrient for plant, is the basis of highly efficient and productive agricultural, is one of most important agricultural material product. However, traditional fertilizer utilization rate is low, the serious wasting of resources and environmental pollution are caused.Slowly/controlled releasing fertilizer is by taking certain Kind of regulatory mechanism technology delays or control fertilizer fertilizer releasing period in the soil and burst size, makes itself and crop nutrition content absorption phase Coordinate or synchronous, is remarkably improved utilization rate of fertilizer, is efficiently required up to chemical fertilizer；Simultaneously, moreover it is possible to reduce nitrate nitrogen leaching, slow down Agricultural non-point source pollution meets the Strategic Demand of national sustainable development；In addition, slow/controlled release fertilizer technology Base-appling once can be realized The nutrient demand of crop entire breeding time simplifies fertilization program, reduces recruitment cost, with time saving, laborsaving, section fertilizer, efficiently Advantage, it has also become the hot spot studied both at home and abroad.

Film-coated controlled release fertilizer is one of current main slow/controlled release fertilizer kind, mainly using granular chemical fertilizer as core, Surface layer coats the inorganic substances or organic polymer of one layer of low aqueous solubility or microsolubility, changes the dissolution characteristic of chemical fertilizer nutrient, from And regulate and control nutrients release.However, rough surface, large specific surface area increases since coating slow-release or control-release fertilizer fertilizer core particle is not rounded Add membrane material amount needed for coating process, not only caused the wasting of resources, but also add additional production cost, improves product city price Lattice limit China's slow/controlled release fertilizer industry Green Development and product scale application.Therefore, there is an urgent need to a kind of simple process, The low-cost granule modified technology of fertilizer core reduces amount of coating material with this, improves film-coated controlled release fertilizer nutrient controlled release essence Accuracy is conducive to product industrial large-scale production and is widely applied in agricultural production.

Related patents CN101659583A discloses a kind of post-processing approach of granulated fertilizer, can improve fertiliser granulates flower The roundness degree and surface flatness taken, however which needs to be equipped with urea and/or aqueous ammonium nitrate solution, coating solute further includes Binder, process is cumbersome, increases processing cost, and binder easily bonds particle.Related patents CN104496566A and CN107840682A announces a kind of granular urea resurfacing method and a kind of improved granular urea resurfacing method, Which improves urea surface particle rounding property by the way of urea granules self-friction after formaldehyde, ureaformaldehyde spraying, and effect is aobvious It writes, however storeroom coefficient of friction is limited, and fills up the urea 100% of granular urea surface depressed portions from big The part of grain urea surface protrusion, fertilizer is surface-modified relatively inefficient, meanwhile, the use of formaldehyde and ureaformaldehyde easily causes environment dirty Dye, health and soil, the food safety to producers are unfavorable, in addition, its surface modification mode narrow application range, it cannot Surface suitable for other fertiliser granulates is modified.

Summary of the invention

In view of the shortcomings of the prior art, the utility model provides a kind of modified dresses in film-coated controlled release fertilizer fertilizer slug particle surface It sets, fertile slug particle is sieved by reforming apparatus, heats, polish, throws round and drying operation, and can be continuously produced, at This is low, energy consumption is small, the smooth rounding of modified fertilizer slug particle.

The utility model is achieved by the following technical solution, and provides a kind of film-coated controlled release fertilizer fertilizer slug particle surface Reforming apparatus is installed with including roller and on the material feeding box of the roller feed end, the material feeding box and connects with drums inside Logical hot gas inlet pipe and the feed pipe in the roller is extended to, the spiral shell for pushing material mobile to discharge end is installed in the roller Rotating shovelling plate.

This programme can be passed through hot wind by hot air inlet pipe into roller and be preheated and heated in cylinder, and roller forward direction turns When dynamic, push fertiliser granulates and abrasive mobile from feed end to discharge end by the effect of spiral shovelling plate, while mobile, Between abrasive, barrel, shovelling plate in fertile slug particle and roller, and generates between fertile slug particle and fertiliser granulates and mutually rub It wipes, realizes the polishing to fertile slug particle surface and throw and justify；And it can realize that continous way is modified by the direction of rotation of change roller With intermittent modification, can satisfy different charging operating conditions then can be used continous way if there is continuous feeder equipment It is modified, if intermittent modification can be used without continuous feeder equipment, improve the application range of the present apparatus.

As optimization, the feed end of the roller is connected with the annular fine ga(u)ge screen extended in material feeding box, opens up on material feeding box There is the little particle discharge port lower than the fine ga(u)ge screen position.This prioritization scheme is rotated forward by the fine ga(u)ge screen of setting annular in roller When, feed end will appear material accumulation, and the material in material heap is ground when rotating with roller, generate different of volume Grain, and there is lamination of the bulky grain in upper, little particle under, during fine ga(u)ge screen is rotated with roller, by specification Too small fertile slug particle screens out, and is flowed out by little particle discharge port, to improve the homogenization degree of fertile slug particle specification；? When roller inverts, material concentrates on feed end and is ground, and will appear be ground too small particle during the grinding process, and is small Particle is located at lower layer, screens out the too small fertile slug particle of specification by fine ga(u)ge screen, the equal of fertile slug particle specification equally can be improved Homogenize degree.

As optimization, sieve rapping apparatus corresponding with the fine ga(u)ge screen is installed on the material feeding box.This prioritization scheme By sieve rapping apparatus to fine ga(u)ge screen carry out rapping, improve small particles material by speed, avoid sieve pore blockade, guarantee The continuity of screening.

As optimization, the filler pipe for being fixed with and extending in roller is also worn on the material feeding box, in roller plus water Pipe is equipped with several axially disposed spray heads.This prioritization scheme can carry out fertilizer synergistic by setting filler pipe and spray head Agent or the addition of surface-modified dose of fertilizer, meet modified a variety of demands.

It further include being fixedly installed and extending to the compression gas pipe inside roller discharge end, on the compression gas pipe as optimization Offer the puff prot towards material.By compression gas pipe and puff prot on material jet drying gas, carry out to fertile core The drying of grain, meets drying requirement.

Further include the feed box positioned at roller discharge end as optimization, the discharge end of the roller be connected with extend to it is described Annular coarse mesh in feed box offers the modified particles discharge port lower than the coarse mesh position on feed box.This optimization Scheme collects modified fertile slug particle more convenient by setting feed box, at the same by coarse mesh by fertile slug particle with Abrasive separation, fertile slug particle are fallen from sieve pore, and abrasive is stopped and stayed in roller by coarse mesh, facilitate recycling.

As optimization, the axis and horizontal direction angle of the roller are 1 ° ~ 6 °, and feed end is lower than discharge end.This is excellent To the setting of roller in change scheme, extend time of the material in roller, and improve spiral shovelling plate and fertile slug particle it Between frictional force, thus improve polishing and throw circle effect.

The application method of this reforming apparatus includes that intermittent modification and continous way are modified；

Continous way it is modified the following steps are included:

(1) abrasive is added into roller, and by the preheating temperature in roller to 45 DEG C ~ 100 DEG C；

(2) fertile slug particle is added to roller, the quality of abrasive used is 0.5 ~ 3 times of fertile slug particle quality, is turned Dynamic roller makes spiral shovelling plate push material mobile to discharge end, and is passed through 100 DEG C ~ 150 DEG C of hot wind, wind into roller simultaneously Amount is 20m3/min ~ 800m3/min, and fertile slug particle surface temperature is made to be maintained at 45 DEG C ~ 100 DEG C, and drum rotation speed is 5 ~ 20rpm, Material is 5 ~ 50min from the time that feed end is moved to discharge end；

Intermittent modification the following steps are included:

(1) abrasive is added into roller, and by the preheating temperature in roller to 45 DEG C ~ 100 DEG C；

(2) fertile slug particle is added to roller, the quality of abrasive used is 0.5 ~ 3 times of fertile slug particle quality, edge Roller is rotated with the modified opposite direction of continous way, grinds fertile slug particle and abrasive in feed end, and simultaneously to rolling 100 DEG C ~ 150 DEG C of hot wind is passed through in cylinder, air quantity is 20m3/min ~ 800m3/min, and fertile slug particle surface temperature is made to be maintained at 45 DEG C ~ 100 DEG C, drum rotation speed is that 5 ~ 20rpm changes the direction of rotation of roller after grinding 5 ~ 40min, using spiral shovelling plate by object Material is pushed into discharge end.

This method can be realized continous way modification and intermittent modification, can satisfy by the direction of rotation of change roller Different charging operating conditions then can be used continous way and be modified, if not continuous if there is continuous feeder equipment Intermittent modification then can be used in feeder equipment, improves the application range of the present apparatus；

The utility model has the following beneficial effects:

1, integrate synergist addition and fertiliser granulates screening, heating, polishing, throw circle, drying, can be realized serialization Surface is modified operation, and simple process, equipment investment are low, energy consumption is small, and strong environmental adaptability, the scope of application is wide, can be widely applied In China's mainstream solvent-free rotary drum coating formula, have solvent bottom spray fluidized bed type sustained-controll-release fertiliser production line, can also be applied to essence Confidential paper serialization, mass deburring, chamfering and knife mark；

2, abrasive is reusable after disposably putting into, the machinery of abrasive matched with Controlled Release Fertilizer fertilizer core particle Frictional strength is much larger than the coefficient of friction between fertilizer, and treatment effeciency is higher, and effect is more significant；

3, fertilizer synergist spraying can be carried out by setting filler pipe and spray head, facilitates and prepares appreciation type fertilizer, be applicable in model Enclose wide, strong operability；

5, become smooth rounding using the fertile slug particle surface that the present apparatus is handled, without obvious protrusion, significantly improve fertile core Grain compost density, roundness and fluidity, reduce fertile slug particle specific surface area, voidage and coated fertilizer dosage, on an equal basis Nutrient controlled release phase film-coated controlled release fertilizer significantly reduces coating dosage, significantly extends nutrients release under the conditions of year-on-year equal coating quantities Phase, to reduce production cost, the low, coated fertilizer that solves in current slow-release or control-release fertilizer industry that there are membrane material nutrient controlled release precisions Key issues of dosage is big, at high cost, industrialization promotion is difficult.

Detailed description of the invention

Fig. 1 is the utility model reforming apparatus structural schematic diagram；

Fig. 2 is the left view of Fig. 1；

Fig. 3 is abrasive charging and heating process；

Fig. 4: non-surface treated and the fertilizer core particle smoothness by the utility model processing；

Fig. 5: non-surface treated and the fertilizer core particle size distribution by the utility model processing；

Fig. 6: non-surface treated and the fertilizer core particle angle of repose by the utility model processing；

Fig. 7: non-surface treated and the fertilizer core granular pile density by the utility model processing；

Fig. 8: non-surface treated and the film-coated controlled release fertilizer nutrient release curve comparison by the utility model processing；

Fig. 9: non-surface treated and the fertilizer core particle surface scanning electron microscope by the utility model processing.

Shown in Fig. 1 and 2:

1, filler pipe, 2, material feeding box, 3, feed pipe, 4, fine ga(u)ge screen, 5, sieve rapping apparatus, 6, roller, 7, insulating layer, 8, Spray head, 9, coarse mesh, 10, puff prot, 11, hot gas dedusting return pipe, 12, compression gas pipe, 13, hot gas inlet pipe, 14, spiral Shovelling plate, 15, modified particles discharge port, 16, support roller, 17, retarder, 18, little particle discharge port, 19, anti-batch turning baffle.

Specific embodiment

In order to clarify the technical characteristics of the invention, being illustrated below by specific embodiment to this programme.

A kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device as shown in Figure 1, including outer surface are arranged and are fixed with The roller 6 of two rolling rings, positioned at the material feeding box 2 of 6 feed end of roller, and positioned at the feed box of roller discharge end, roller Diameter be 0.5 ~ 6m, length is 2 ~ 10m, and the axis of roller and horizontal direction angle are 1 ° ~ 6 °, and feed end is lower than discharging End.

The barrel outer layer of roller is equipped with insulating layer 7, is installed in roller and material is pushed spirally to copy to discharge end is mobile Plate 14, roller is driven by driving device to be rotated, and driving device includes four in distributed rectangular and the support roller 16 of the support rolling ring, At least one support roller connects clockwise and anticlockwise motor when clockwise and anticlockwise motor drives support roller rotation by retarder 17 and utilizes support roller and rolling Frictional force between circle drives rolling ring rotation, so that roller be made to rotate.

It is installed with the hot gas inlet pipe 13 being connected to drums inside on material feeding box 2 and extends to the feed pipe 3 in the roller, rolls The feed end of cylinder 6, which is connected with, to be extended in material feeding box 2 and annular fine ga(u)ge screen 4 corresponding with feed pipe outlet, and fine ga(u)ge screen 4 and roller are same Axis and sealing it is affixed, the feed end of fine ga(u)ge screen is fixedly provided with anti-batch turning baffle 19, prevent material from feed end flow out, fine ga(u)ge screen Sieve diameter be 0.5 ~ 3mm, the little particle that generates to sift out after grinding.

Sieve rapping apparatus 5 corresponding with the fine ga(u)ge screen is installed on material feeding box 2, passes through 5 rapping of sieve rapping apparatus Pore sieve, prevents putty；Material feeding box 2 also on offer the little particle discharge port 18 lower than 4 position of fine ga(u)ge screen, fertilizer Slug particle drops down onto fine ga(u)ge screen after feed pipe outflow, and short grained material is flowed out by little particle discharge port, remaining particle is being fed It is pushed by material heap to discharge end in the case where pipe constantly charging.

The filler pipe 1 for being fixed with and extending in roller is also worn on material feeding box, filler pipe 1 extends to one end in roller away from pore Sieve 0.5 ~ 5m, filler pipe in roller is equipped with several axially disposed spray heads 8, between adjacent spray head between be divided into 0.5~2.5m。

The compression gas pipe 12 inside roller discharge end is fixedly installed and extended on feed box, is offered on the compression gas pipe Towards the puff prot 10 of material, when use, purges material by compression gas pipe and puff prot, and 10 ~ 60 are divided between purging S/ times, blow 60 ~ 200 L/h of air consumption.

The discharge end of roller is connected with the annular coarse mesh 9 extended in the feed box, offers on feed box lower than institute The modified particles discharge port 15 of coarse mesh position is stated, coarse mesh 9 is coaxial with roller and is tightly connected, and the sieve diameter of coarse mesh is 5 ~ 6mm, feed box are equipped with sieve rapping apparatus corresponding with coarse mesh, and hot gas dedusting reflux is connected at the top of feed box Pipe 11.

The application method of above-mentioned film-coated controlled release fertilizer fertilizer slug particle surface modification device, including continous way modification and interval Formula is modified, as shown in figure 3, continous way it is modified the following steps are included:

1 refers to abrasive is added into roller, and the quality of abrasive used is 0.5 ~ 3 times of fertile slug particle quality, and Hot wind is passed through into roller by hot gas inlet pipe, and by the preheating temperature in roller to 45 DEG C ~ 100 DEG C；

2 refer to and are screened out short grained material by fine mesh, guarantee the uniformity of material specification；

3 refer to that the fertile slug particle that will retain after screening is added to roller；

4 refer to that film-coated controlled release fertilizer fertilizer slug particle Process of Surface Modification, pretreatment time are 5 ~ 50min；

Wherein 4 in Fig. 3 include tetra- kinds of surface modification modes of 4-1,4-2,4-3 and 4-4: 4-1 is not add any synergy It is modified that agent and modifying agent carry out fertile slug particle surface；4-2 is that only the fertile slug particle surface of addition fertilizer synergist progress is modified, is used When fertilizer synergist, dry matter dosage is the 0.1 ~ 5% of fertiliser granulates quality, and addition rate is 10 ~ 50 g/s；4-3 is only to add Add the fertile slug particle surface of surface-modified dose of progress of fertilizer modified, when surface modifying species, dosage is the 0.1 ~ 5% of fertiliser granulates quality, Addition rate is 10 ~ 80 g/s；4-4 is to add surface-modified dose of fertilizer simultaneously to be modified with the fertile slug particle surface of fertilizer synergist progress, Dry matter dosage when using fertilizer synergist is the 0.1 ~ 5% of fertiliser granulates quality, and addition rate is 10 ~ 50 g/s, is added simultaneously When entering surface modifying species, surface modifying species dosage is the 0.1 ~ 5% of fertiliser granulates quality, and addition rate is 10-80 g/s；

5 be heating and temperature control, and fertile slug particle surface temperature is 45 DEG C ~ 100 DEG C；

6 be air blast, rotates forward roller and passes through the hot wind that hot gas inlet pipe is passed through 100 DEG C ~ 150 DEG C into roller simultaneously, Air quantity is 20m3/min ~ 800m3/min, and fertile slug particle surface temperature is made to be maintained at 45 DEG C ~ 100 DEG C；

7 be rotation control, drum rotation speed be 5 ~ 20rpm, material from feed end be moved to discharge end time be 5 ~ 50min；

8 be spice, pushes fertiliser granulates and abrasive mobile from feed end to discharge end by the effect of spiral shovelling plate, While mobile, between the abrasive, barrel, shovelling plate in fertile slug particle and roller, and between fertile slug particle and fertiliser granulates Phase mutual friction is generated, the polishing to fertile slug particle surface is realized and throws and justify；

9 be that compressed air interval purges, and compressed air interval is divided into 10 ~ 60 s/ time between purging, and blows air consumption 60 ~ 200 L/h；

10 be drying process, and such as surface-modified mode of fertilizer selects to cope with fertiliser granulates when the process of the aqueous solution containing fertilizer synergist It is dried；

11 be by discharging, cooling, encapsulation and storage process after fertiliser granulates and abrasive screening, and fertiliser granulates are by coarse mesh It falls, abrasive is stopped by coarse mesh, facilitates recycling.

The intermittent modification difference modified with continous way is, after charging, rotates backward roller, fertile slug particle and abrasive It is fully ground in feed end, the fine particle generated in process of lapping leaks down from fine ga(u)ge screen, and after the completion of grinding, roller is just Turn, material is pushed into discharge end using spiral shovelling plate.

This reforming apparatus can be applied to urea, nitrophosphate fertilizer, ammonium hydrogen carbonate, NPK compound fertilizer, ammonium nitrate, ammonium sulfate, phosphoric acid The modification of hydrogen diammonium, ammonium dihydrogen phosphate, potassium chloride, potassium sulfate or potassium nitrate granules, it is applied widely.

Abrasive can be used by Brown Alundum, white fused alumina, steel ball, white pottery porcelain, zirconium oxide bead, bead, pink fused alumina, high frequency One or more of abrasive grains made of porcelain, resin, bamboo grain or stainless steel.

Certainly, above description is also not limited to the example above, and technical characteristic of the utility model without description can lead to It crosses or realizes that details are not described herein using the prior art；Above embodiments and attached drawing are merely to illustrate the technology of the utility model Scheme is not limitations of the present invention, and the utility model is described in detail referring to preferred embodiment, this Field it is to be appreciated by one skilled in the art that those skilled in the art institute in the essential scope of the utility model The variations, modifications, additions or substitutions made without departure from the objective of the utility model, want by the right that also should belong to the utility model Seek protection scope.

Claims (7)

1. a kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device, it is characterised in that: including roller (6) and be located at described The material feeding box (2) of roller (6) feed end, be installed on the material feeding box (2) the hot gas inlet pipe (13) being connected to drums inside and The feed pipe (3) in the roller is extended to, the spiral shovelling plate for pushing material mobile to discharge end is installed in the roller (14).

2. a kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device according to claim 1, it is characterised in that: institute The feed end for stating roller (6) is connected with the annular fine ga(u)ge screen (4) extended in material feeding box, is offered on material feeding box (2) lower than described The little particle discharge port (18) of fine ga(u)ge screen (4) position.

3. a kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device according to claim 2, it is characterised in that: institute It states and sieve rapping apparatus (5) corresponding with the fine ga(u)ge screen is installed on material feeding box (2).

4. a kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device according to claim 1, it is characterised in that: institute The filler pipe (1) for also wearing on material feeding box and being fixed with and extending in roller is stated, the filler pipe in roller is equipped with several along axis To the spray head (8) of arrangement.

5. a kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device according to claim 4, it is characterised in that: also Including being fixedly installed and extending to the compression gas pipe (12) inside roller discharge end, offer on the compression gas pipe towards material Puff prot (10).

6. a kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device according to claim 1, it is characterised in that: also Feed box including being located at roller discharge end, the discharge end of the roller are connected with the annular coarse mesh extended in the feed box (9), the modified particles discharge port (15) lower than the coarse mesh position is offered on feed box.

7. a kind of film-coated controlled release fertilizer fertilizer slug particle surface modification device according to claim 1, it is characterised in that: institute It states the axis of roller and horizontal direction angle is 1 ° ~ 6 °, and feed end is lower than discharge end.