CN106944186A - A kind of granular mill of caking fertiliser - Google Patents

Abstract

The invention discloses a kind of granular mill of caking fertiliser, first reducing mechanism carries out preliminary crushing to caking fertiliser, obtain the chemical fertilizer granule compared with small particle, carry out fine crushing to caking fertiliser by the second reducing mechanism again, and pass through screen plate group, filter out the chemical fertilizer granule of bulky grain, hooked using the crushing on the second reducing mechanism and take back the chemical fertilizer granule of bulky grain, carry out secondary fine crushing, until the used screen plate group of chemical fertilizer granule energy, solving has part bulky grain chemical fertilizer can not carry out the technical problem that separating twice reaches feature particle size in conventional size reduction device, realize the technique effect of no residue residual.

Description

A granule pulverizer for agglomerated chemical fertilizers

technical field

The invention relates to the technical field of agricultural automation machinery and equipment, in particular to a granular crusher for agglomerating chemical fertilizers.

Background technique

In agricultural production, the amount of chemical fertilizers, especially compound chemical fertilizers, accounts for a large proportion. Chemical fertilizers include ammonium chloride, phosphate fertilizers, and various organic fertilizers. During long-distance transportation or storage in relatively humid places, especially large farms will use a large amount The chemical fertilizers are piled up and stored in the warehouse, which is prone to agglomeration, and the agglomerated fertilizers are difficult to melt quickly and are absorbed by crops, so they cannot be directly used in agricultural production. However, the existing technologies for crushing agglomerated fertilizers are mostly Manually opening bags and crushing manually, this method has the problems of poor crushing effect, low efficiency, easy loss of fertilizers, and even harm to human health.

In the Chinese patent whose patent number is CN204602284U, a chemical fertilizer particle crushing device is mentioned, which can crush agglomerated chemical fertilizers, and obtain fertilizer particles with a specific particle size through the set screen, but in the process of crushing, it is necessary to A certain amount of large-grain fertilizers cannot pass through the sieve, resulting in accumulation at the sieve. Although the above-mentioned fertilizer granule crushing device adds a fan, the large-grain fertilizer is blown back to the crushing mechanism through the fan for secondary crushing. Due to the influence of the wind power of the fan, there must be some large-grained fertilizers that cannot be blown by the fan, and thus cannot be secondary crushed to a specific particle size, and converted into residues that need to be manually cleaned and crushed.

Contents of the invention

In view of the above problems, the present invention provides a particle pulverizer for agglomerated fertilizers. The first pulverization device preliminarily pulverizes the agglomerated fertilizers to obtain fertilizer particles with smaller particle sizes, and then the agglomerated fertilizers are crushed by the second pulverization device. Carry out fine crushing, and pass through the screening plate group to screen out large-grained fertilizer particles, use the crushing hook on the second crushing device to bring back the large-grained fertilizer particles, and perform secondary fine crushing until the fertilizer particles can be used for screening The plate group solves the technical problem in the background technology that some large-grained chemical fertilizers cannot be crushed twice to reach the characteristic particle size, and realizes the technical effect of no residue remaining.

To achieve the above object, the present invention provides the following technical solutions:

A granule pulverizer for agglomerated chemical fertilizers, comprising a frame, a first pulverizing device, a second pulverizing device and a connecting pipe set, the first pulverizing device is fixedly arranged on the top of the frame, and the connecting pipe set passes through the first pulverizing device below. connected to the upper end of the second crushing device, and the second crushing device is fixedly connected to the frame; the first crushing device includes a first crushing bin, and a first crushing roller set inside the first crushing bin, The first crushing roller group performs preliminary crushing on the agglomerated fertilizer; the second crushing device includes a second crushing bin, a second crushing roller group and a screening plate group, and the second crushing roller group is arranged on the second Inside the crushing chamber, the lower end is provided with the screening plate set, and the second crushing roller set cooperates with the screening plate set to finely pulverize the agglomerated fertilizer.

As an improvement, the first crushing roller set includes coarse crushing rollers symmetrically arranged on both sides inside the first crushing chamber, the two ends of the coarse crushing roller are rotatably arranged on the first crushing chamber, and along the The circumference of the coarse crushing roller body is equidistantly distributed with a number of crushing bumps from one side to the other. The bumps crush the agglomerated fertilizer, and the granular fertilizer flows into the next stage through the gap between the bumps. process.

As an improvement, the bottom of the first crushing bin is also symmetrically provided with discharge grooves in the shape of an inverted trapezoid, and the discharge grooves are respectively set corresponding to the coarse crushing rollers. The discharge grooves are set to facilitate the fertilizer It flows smoothly into the next process, and will not form accumulations in the corners of the first crushing chamber.

As an improvement, the first crushing device also includes:

a first gear set, the first gear set includes a first gear symmetrically and fixedly arranged at the end of the first crushing roller set; and

The first drive motor, the first drive motor is fixed on the frame, it is located on the front side of the first crushing chamber, and it is connected to any coarse crushing roller in the first crushing roller group through a belt drive .

The first driving motor drives any coarse crushing roller to rotate through belt transmission, and the coarse crushing roller drives the other coarse crushing roller to rotate through the meshing of the first gear set to crush the agglomerated fertilizer.

As an improvement, the second crushing roller set includes a first fine crushing roller and a second fine crushing roller symmetrically arranged on both sides inside the second crushing chamber, and the two ends of the first fine crushing roller and the second fine crushing roller They are all rotatably installed on the second crushing bin; along the circumferential direction of the first fine crushing roller body, there are a number of first fine crushing hooks equidistantly distributed from one side to the other side, along the second fine crushing roller body. A plurality of second fine crushing hooks are equidistantly distributed from one side to the other side of the grinding roller body in the circumferential direction.

As an improvement, both the first fine grinding hook and the second fine crushing hook are arranged in an L shape, and the first fine crushing hook and the second fine crushing hook are arranged alternately.

As an improvement, the screening plate group includes a first screening plate and a second screening plate respectively corresponding to the first fine grinding roll and the second fine grinding roll, and the first screening plate and the second screening plate are two The crescent-shaped setting of the side, high and middle part is low; the first screening slot corresponding to the first fine crushing hook is provided through the first screening plate, and the first screening groove corresponding to the first fine crushing hook is provided on the second screening plate. The second screening slot corresponding to the crushing hook.

The first fine crushing hook and the second fine crushing hook respectively lift up the agglomerated fertilizer that cannot pass through the first screening plate and the second screening plate, and then gradually compress the first fine crushing roller and the second fine crushing roller The gaps between a fine crushing roller and the first screening plate and the second fine crushing roller and the second screening plate are used to crush the agglomerated fertilizer by utilizing the change of the gap.

Using the first fine crushing hook and the second fine crushing hook arranged alternately, the remaining agglomerated chemical fertilizers that have not passed through the first screening plate and the second screening plate, with the rotation of the first fine crushing hook and the second fine crushing hook Send back to the first screening plate and the second screening plate for the next crushing.

As an improvement, the second crushing device also includes:

A feeding box group, the feeding box group is fixedly arranged on the upper end of the second crushing bin, and the upper end opening of the feeding box group is arranged facing the connecting pipe group; and

a second gear set, the second gear set includes second gears symmetrically and fixedly arranged at the end of the second crushing roller set;

A second driving motor, the second driving motor is fixedly arranged on the frame, it is located at the front side of the second crushing bin, and its motor shaft is fixedly connected to the front end of the first fine crushing roller.

As an improvement, the feeding box group includes a first feeding box and a second feeding box symmetrically arranged on the upper end of the second crushing bin; The first feeding chute corresponding to the hook, the second feeding box is provided with a second feeding chute corresponding to the second finely crushing hook.

As an improvement, a discharge bin group is connected to the bottom of the second crushing bin, and the discharge bin group includes:

A discharge bin, the upper end of the discharge bin is fixedly connected to the lower end of the second crushing bin, the discharge bin is arranged in an inverted trapezoidal shape, and a discharge hole is opened at the center of the lower end surface; and

A discharge pipe is provided corresponding to the discharge hole, and a discharge ball valve is provided in the middle of the discharge pipe.

The beneficial effects of the present invention are:

(1) Compared with the traditional device, the present invention adopts the first pulverizing device to carry out preliminary pulverization of the agglomerated fertilizer to obtain fertilizer particles with a smaller particle size, and then finely pulverizes the agglomerated fertilizer by the second pulverizing device, and passes through the screening The plate group screens out the large-grained fertilizer particles, and uses the crushing hook on the second crushing device to bring back the large-grained fertilizer particles for secondary fine crushing until the fertilizer particles can pass through the screening plate group, realizing the crushing process. No residue left;

(2) When the first crushing bin is set in the present invention, discharge grooves in the shape of an inverted trapezoid are symmetrically arranged at the bottom of the first crushing bin, and the discharge grooves are respectively set corresponding to the coarse crushing rollers, and the discharge grooves The setting of the groove is conducive to the smooth flow of chemical fertilizers into the next process, and will not form accumulations in the corners of the first crushing bin;

(3) When the second crushing device is set in the present invention, a first feeding box and a second feeding box are respectively arranged on both sides of the upper end of the second crushing bin, and the first feeding box is provided with a A first feeding trough corresponding to the fine crushing hook, and a second feeding chute corresponding to the second fine crushing hook is arranged on the second feeding box, and the first fine crushing hook is used to connect with the first feeding box and the second feeding trough. When the second fine crushing hook and the second feeding box are hooked and fed, the large particle fertilizer is crushed once;

(4) In the present invention, when the second crushing device is set, the first screening plate and the second screening plate of the screening plate group are all set to a crescent shape with a high, middle and low part on both sides, falling on the first screening plate and the second screening plate The large-grained chemical fertilizer on the top will be piled up at the low position in the middle, so that the agglomerated chemical fertilizer is within the range of the first fine crushing hook and the second fine crushing hook;

(5) In the present invention, when the second crushing device is set, the first fine crushing hook and the second fine crushing hook are interlaced, and the rotation of the first fine crushing hook and the second fine crushing hook that are staggered is used to make the first fine crushing hook and the second fine crushing hook alternately arranged. 2. During the crushing process of the crushing device, the large-grain fertilizers that still fail to pass through the screening plate group are brought back to the screening plate group for the next crushing;

(6) In the present invention, when the second crushing device is set, the first fine crushing hook and the second fine crushing hook are respectively matched with the first screening slot and the second screening slot, and the hooks will be stuck in the first screening slot and the second screening slot. The fertilizer particles inside are drawn out from the first screening slot and the second screening slot to prevent the fertilizer from blocking the first screening slot and the second screening slot;

(7) When the discharge bin is set in the present invention, the discharge bin is set as an inverted trapezoid, and a discharge hole is provided at the center of the lower end surface, and the fertilizer entering the discharge bin will roll along the side wall of the discharge bin To the bottom discharge hole to ensure that the fertilizer will not accumulate in the discharge bin;

In summary, the invention has the characteristics of high crushing degree, no residue, stable structure and novelty; it is especially suitable for the technical field of chemical fertilizer crushing machinery, and realizes the crushing of large particle fertilizer without residue.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the isometric side of the present invention;

Fig. 2 is a partial structural schematic diagram of the first crushing device of the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of the first crushing device of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of a second crushing device of the present invention;

Fig. 5 is the structural schematic diagram of the second pulverizing roller group and screening plate group of the present invention;

Fig. 6 is a partial structural schematic diagram of the second crushing device of the present invention;

Fig. 7 is a schematic diagram of the connection structure between the second crushing device and the second drive motor of the present invention;

Fig. 8 is a schematic diagram of the structure of the discharge bin group of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

Example:

As shown in Fig. 1, Fig. 2 and Fig. 4, a particle pulverizer of agglomerated chemical fertilizers comprises a frame 1, a first pulverizing device 2, a second pulverizing device 3 and a connecting pipe group 4, and the first pulverizing device 2 is fixedly arranged At the top of the frame 1, the bottom thereof is connected to the upper end of the second crushing device 3 through the connecting pipe group 4, and the second crushing device 3 is fixedly connected to the frame 1; the first crushing device 2 includes the first crushing device 2 A crushing bin 21, and the first crushing roller group 22 arranged inside the first crushing bin 21, the first crushing roller group 22 carries out preliminary crushing to the agglomerated fertilizer; the second crushing device 3 includes a second crushing The bin 31, the second crushing roller group 32 and the screening plate group 34, the second crushing roller group 32 is arranged inside the second crushing chamber 31, and the screening plate group 34 is arranged at its lower end, the second crushing roller group The group 32 cooperates with the screening plate group 34 to finely pulverize the agglomerated fertilizer.

It should be noted that the first pulverizing device 2 preliminarily pulverizes the agglomerated fertilizer to obtain large-grained fertilizer, and after the large-granularized fertilizer enters the second pulverizing device 3, it can be directly output through the fertilizer of the screening plate group 34, The rest of the chemical fertilizers that cannot pass through are then co-rolled between the second crushing roller group 32 and the screening plate group to obtain fertilizers that can pass through the screening plate group 34 .

As a preferred embodiment, the first crushing roller set 22 includes coarse crushing rollers 221 symmetrically arranged on both sides inside the first crushing chamber 21, and the two ends of the coarse crushing roller 221 are rotatably arranged on the first A number of crushing bumps 222 are equidistantly distributed from one side to the other side of the coarse crushing roller 221 along the circumference of the coarse crushing roller 221 on the crushing bin 21 .

Further, the bottom of the first crushing bin 21 is also symmetrically provided with discharge grooves 211 in the shape of an inverted trapezoid, and the discharge grooves 211 are respectively arranged corresponding to the coarse crushing rollers 221 .

It is worth noting that the setting of the discharge groove 211 is to facilitate the smooth flow of the fertilizer into the next process, so as not to form accumulations in the corners of the first crushing bin.

As shown in Figure 2 and Figure 3, further, the first crushing device 2 also includes:

The first gear set 23, the first gear set 23 includes a first gear 231 symmetrically and fixedly arranged at the end of the first crushing roller set 22; and

The first drive motor 24, the first drive motor 24 is fixedly arranged on the frame 1, it is located at the front side of the first crushing bin 21, and it is connected to the first crushing roller group 22 by belt transmission. Any coarse crushing roller 221.

It is worth noting that the first drive motor 24 drives any coarse crushing roller 221 to rotate through a belt transmission mode, and the coarse crushing roller 221 drives another coarse crushing roller 221 to rotate synchronously through the meshing of the first gear set 23 to prevent agglomeration. Fertilizers are formed by extrusion crushing.

As shown in FIG. 5 , as an improved technical solution, the second crushing roller set 32 includes a first fine crushing roller 321 and a second fine crushing roller 322 symmetrically arranged on both sides inside the second crushing bin 31 , and Both ends of the first fine crushing roller 321 and the second fine crushing roller 322 are rotatably arranged on the second crushing chamber 31; A plurality of first fine crushing hooks 3211 are equidistantly distributed on one side, and a plurality of second fine crushing hooks 3221 are equidistantly distributed along the circumferential direction of the second fine crushing roller 322 from one side to the other side.

Further, the first fine grinding hooks 3211 and the second fine grinding hooks are arranged in an L shape, and the first fine grinding hooks 3211 and the second fine grinding hooks 3221 are arranged alternately.

It should be specifically noted that the shapes of the first finely crushing hook 3211 and the second finely crushing hook 3221 are not limited to the embodiment proposed in this embodiment, the first finely crushing hook 3211 and the second finely crushing hook 3221 arranged alternately Hook the large-grained chemical fertilizers that have not passed the screening on the screening plate set 34, and utilize the cooperation between the second crushing roller set 32 and the screening plate set 34 to crush and crush it.

As an improved technical solution, the screening plate group 34 includes a first screening plate 341 and a second screening plate 342 respectively corresponding to the first fine grinding roller 321 and the second fine grinding roller 322, and the first The screening plate 341 and the second screening plate 342 are all crescent-shaped settings with high, middle and low parts on both sides; the first screening plate 341 is penetrated with a first screening groove 3411 corresponding to the first fine crushing hook 3211, so A second screening groove 3421 corresponding to the second fine crushing hook 3221 is provided through the second screening plate 342 .

It should be noted that the gaps between the first screening plate 341 and the first fine crushing roller 321 and the second screening plate 342 and the second fine crushing roller 322 are from large to small, the first screening groove 3411 and the second screening The groove 3421 is used to screen fertilizers, and is used to pass through the first fine crushing hook 3211 and the second fine crushing hook 3221. The width of the first screening groove 3411 and the second screening groove 3421 can be adjusted according to different requirements to obtain different particle sizes required fertilizers.

It is further explained that the positions of the first screening plate 341 and the first fine crushing roller 321 and the second screening plate 342 and the second fine crushing roller 322 can be interchanged.

As shown in Figure 6 and Figure 7, further, the second crushing device also includes:

A feeding box group 33, the feeding box group 33 is fixedly arranged on the upper end of the second crushing bin 31, and the upper end opening of the feeding box group 33 is arranged facing the connecting pipe group 4; and

The second gear set 35, the second gear set 35 includes a second gear 351 symmetrically and fixedly arranged at the end of the second crushing roller set 32;

The second drive motor 36, the second drive motor 36 is fixedly arranged on the frame 1, it is positioned at the front side of the second crushing bin 31, and its motor shaft is connected with the first fine crushing roller 321 or the second crushing roller 321. The front end of the fine crushing roller 322 is fixedly connected.

It should be noted that the second drive motor 36 drives the first fine crushing roller 321 to rotate, which drives the second fine crushing roller 322 to rotate synchronously through the engagement of the second gear set 35, and the second drive motor 36 drives the second fine crushing roller 322 Rotation, which drives the first fine grinding roller 321 to rotate synchronously through the meshing of the second gear set 35 .

Furthermore, the feeding box group 33 includes a first feeding box 331 and a second feeding box 332 symmetrically arranged on the upper end of the second crushing bin 31; the first feeding box 331 is provided with a The first feed trough 3311 corresponding to the first finely crushing hook 3211 , and the second feed trough 3321 corresponding to the second finely crushing hook 3221 is provided on the second feed box 332 .

It should be noted that the first feed box 331 is provided with a first feed chute 3311 corresponding to the first finely crushed hook 3211, and the second feed box 332 is provided with a hook 3221 corresponding to the second finely crushed hook 3211. Corresponding second feeding chute 3321, when utilizing the first fine crushing hook 3211 and the first feeding box 331 and the second fine crushing hook 3221 and the second feeding box 332 to cooperate to feed, the chemical fertilizer of large particle Perform a smash.

As shown in FIG. 8 , as a preferred embodiment, a discharge bin group 5 is connected to the bottom of the second crushing bin 31, and the discharge bin group 5 includes:

A discharge bin 51, the upper end of the discharge bin 51 is fixedly connected to the lower end of the second crushing bin 31, the discharge bin 51 is set in an inverted trapezoidal shape, and a discharge hole 511 is provided at the center of its lower end surface; and

A discharge pipe 52 is provided corresponding to the discharge hole 511 , and a discharge ball valve 53 is provided in the middle of the discharge pipe 52 .

It should be noted that the discharge bin 51 is set as an inverted trapezoid, and a discharge hole 511 is opened at the center of its lower end surface, and the fertilizer entering the discharge bin will roll to the bottom discharge hole along the side wall of the discharge bin. , to ensure that the chemical fertilizers will not be piled up in the 51 in the feed bin.

The working process is as follows:

The agglomerated chemical fertilizer is introduced into the first crushing device 2, and the agglomerated chemical fertilizer is initially crushed by the first crushing roller group 22 to obtain large particle fertilizer, and then the chemical fertilizer is input into the feed box of the second crushing device 3 In the group 33, utilize the first fine crushing hook 3211 and the second fine crushing hook 3221 on the second crushing roller group 32 to hook the chemical fertilizer in the feeding box group 33 onto the screening plate group 34, and utilize the screening plate group 34 pairs The chemical fertilizers are screened, and the chemical fertilizers that meet the particle size requirements are output through the screening plate group 34, and the large particle fertilizers that do not meet the particle size requirements are left on the screening plate group 34, respectively using the first fine crushing hook 3211 and the second fine crushing hook 3221 Pull together the large-grain fertilizers on the screening plate group 34, and use the rolling effect between the second crushing roller group 32 and the screening plate group 34 to crush the large-grain fertilizers. Then with the rotation of the first fine crushing hook 3211 and the second fine crushing hook 3221, return to the screening plate set 34 for the next rolling and crushing until all the fertilizers pass through the screening plate set 34.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. a particle pulverizer of agglomerated chemical fertilizer, is characterized in that, comprises frame (1), the first pulverizing device (2), the second pulverizing device (3) and connecting pipe group (4), described first The crushing device (2) is fixedly arranged on the top of the frame (1), and its lower part is connected with the upper end of the second crushing device (3) through the connecting pipe group (4), and the second crushing device (3) is connected with the upper end of the second crushing device (3). The frame (1) is fixedly connected; the first crushing device (2) includes a first crushing bin (21), and a first crushing roller group (22) arranged inside the first crushing bin (21). A crushing roller group (22) carries out preliminary crushing to the agglomerated fertilizer; the second crushing device (3) includes a second crushing bin (31), a second crushing roller group (32) and a screening plate group (34), The second crushing roller set (32) is arranged inside the second crushing bin (31), and the screening plate set (34) is arranged at the lower end thereof, and the second crushing roller set (32) and the screening plate Group (34) cooperates to finely pulverize the agglomerated fertilizer. 2. The granular crusher of agglomerated chemical fertilizer according to claim 1, characterized in that, the first crushing roller group (22) includes two rollers symmetrically arranged on both sides inside the first crushing bin (21). Coarse crushing roller (221), the two ends of the coarse crushing roller (221) are rotatably arranged on the first crushing chamber (21), and along the circumferential direction of the coarse crushing roller (221) from one side A number of crushing bumps (222) are equidistantly distributed to the other side. 3. The granular crusher of agglomerated chemical fertilizer according to claim 2, characterized in that, the bottom of the first crushing bin (21) is also symmetrically provided with an inverted trapezoidal discharge groove (211) , and the discharge grooves (211) are respectively set corresponding to the coarse crushing rollers (221). 4. The particle pulverizer of a kind of caking chemical fertilizer according to claim 2, is characterized in that, described first pulverizing device (2) also comprises: The first gear set (23), the first gear set (23) includes a first gear (231) symmetrically fixedly arranged at the end of the first crushing roller set (22); and The first drive motor (24), the first drive motor (24) is fixedly arranged on the frame (1), it is located at the front side of the first crushing bin (21), and it is connected by a belt drive Any coarse crushing roller (221) in the first crushing roller group (22). 5. The particle pulverizer of a kind of agglomerated chemical fertilizer according to claim 1, characterized in that, the second pulverizing roller group (32) includes first rollers symmetrically arranged on both sides inside the second pulverizing bin (31). The fine grinding roller (321) and the second fine grinding roller (322), and the two ends of the first fine grinding roller (321) and the second fine grinding roller (322) are all rotatably arranged in the second grinding chamber (31 ); along the circumferential direction of the first fine crushing roller (321) roller body, there are several first fine crushing hooks (3211) equidistantly distributed from one side to the other side, along the second fine crushing roller ( 322) A plurality of second fine crushing hooks (3221) are equidistantly distributed from one side to the other side of the roller body in the circumferential direction. 6. A granule pulverizer for agglomerated chemical fertilizers according to claim 5, characterized in that both the first fine pulverization hook (3211) and the second fine pulverization hook are L-shaped, and the second One fine crushing hook (3211) and the second fine crushing hook (3221) are arranged alternately. 7. The granule pulverizer of agglomerated chemical fertilizer according to claim 5, characterized in that, the screening plate group (34) includes the first fine crushing roller (321) and the second fine crushing roller respectively corresponding to the (322) the first screening plate (341) and the second screening plate (342) are established, and the first screening plate (341) and the second screening plate (342) are all crescent-shaped settings with high, middle and low parts on both sides; The first screening plate (341) is provided with a first screening groove (3411) corresponding to the first fine crushing hook (3211), and the second screening plate (342) is provided with a The second fine crushing hook (3221) corresponds to the second screening tank (3421). 8. The particle pulverizer of a kind of agglomerated chemical fertilizer according to claim 5, characterized in that, the second pulverizing device further comprises: A feeding box group (33), the feeding box group (33) is fixedly arranged on the upper end of the second crushing bin (31), and the upper end opening of the feeding box group (33) is facing the connecting pipe group (4) Settings; and The second gear set (35), the second gear set (35) includes a second gear (351) symmetrically and fixedly arranged at the end of the second crushing roller set (32); The second driving motor (36), the second driving motor (36) is fixedly arranged on the frame (1), it is located at the front side of the second crushing bin (31), and its motor shaft is connected with the first The front end of a fine grinding roller (321) or the second fine grinding roller (322) is fixedly connected. 9. The particle pulverizer of a kind of agglomerated chemical fertilizer according to claim 8, characterized in that, the feed box group (33) includes a first feeding box symmetrically arranged on the upper end of the second crushing bin (31). A feed box (331) and a second feed box (332); the first feed box (331) is provided with a first feed chute (3311) corresponding to the first fine crushing hook (3211), The second feeding box (332) is provided with a second feeding groove (3321) corresponding to the second fine grinding hook (3221). 10. The granule pulverizer of agglomerated chemical fertilizer according to claim 1, characterized in that, a discharging bin group (5) is connected to the bottom of the second crushing bin (31), and the discharging bin group (5) The group (5) includes: a discharge bin (51), the upper end of the discharge bin (51) is fixedly connected to the lower end of the second crushing bin (31), the discharge bin (51) is arranged in an inverted trapezoid, A discharge hole (511) is provided at the center of the lower end face; and A discharge pipe (52) is provided corresponding to the discharge hole (511), and a discharge ball valve (53) is provided in the middle of the discharge pipe (52).