CN213434304U - Airflow cooling dripping granulation system - Google Patents

Abstract

The utility model provides an air current cooling drippage granulation system, including distributing device and at least one cross-flow fan, the distributing device is used for passing through the distributing device with fluid form fertilizer raw materials and forms the fertilizer liquid drop that sprays to the first direction, the first direction with the contained angle alpha of horizontal direction is: alpha is more than 0 and less than 180; the at least one cross-flow fan is used for rolling the fertilizer liquid drops to a second direction and forming fertilizer particles in the rolling process, wherein an included angle beta between the second direction and the horizontal direction is as follows: beta is more than or equal to 0 and less than 90, beta is less than alpha, and the cross-flow fan is positioned below the distributing device. The utility model discloses a set up the direction of motion that cross-flow fan changed the fertilizer liquid drop to form the fertilizer granule in rolling process cooling, it can reduce the production facility height in the granulation of prior art crowning tower, practices thrift the space, compares in the steel band cooling formation flat fertilizer granule, the utility model discloses can form spherical fertilizer granule.

Description

Airflow cooling dripping granulation system

Technical Field

The utility model relates to a fertilizer technical field, concretely relates to air current cooling drippage granulation system.

Background

The present method for producing fertilizer is mainly characterized by adopting high tower granulation, so-called high tower granulation is that the molten urea and raw materials of phosphorus and potassium are adopted, under the condition of fully mixing them to obtain mixed slurry, and the mixed slurry is sprayed from top of high tower, and the mixed slurry drops are made into heat exchange with air resistance risen from bottom of high tower in the course of descending from high tower, then cooled into granular fertilizer, and fallen to bottom of tower, and then screened so as to obtain the granular composite fertilizer. The purpose of adopting high tower granulation is to cool fertilizer liquid drops from the high position to form granules, but the construction and maintenance of the high tower at present need higher cost and the environmental protection investment is larger, the high tower is changed into the low tower, and due to the limitation of the height of the low tower, the fertilizer liquid drops are not completely cooled or the formed granules can not reach the fertilizer standard. At present, a method for cooling fertilizers by using a steel belt appears in the industry, namely, molten fertilizers are dropped on the steel belt and cooled on the steel belt, although the height of equipment can be reduced by using the steel belt cooling method, the formed fertilizer particles are flat and cannot form spherical fertilizer particles, and the fertilizer particles are easy to break when being dropped on the steel belt, so that the fertilizers with the desired particle size cannot be obtained.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an air current cooling drips granulation system. The specific technical scheme is as follows.

An air-cooled drip granulation system, comprising:

the distributing device is used for forming fertilizer liquid drops sprayed to a first direction from fluid fertilizer raw materials through the distributing device, and the included angle alpha between the first direction and the horizontal direction is as follows: alpha is more than 0 and less than 180;

at least one cross-flow fan for rolling the fertilizer droplets in a second direction and forming fertilizer granules during rolling, wherein an angle beta between the second direction and the horizontal direction is: beta is more than or equal to 0 and less than 90, beta is less than alpha, and the cross-flow fan is positioned below the distributing device.

In a preferred embodiment, the cross-flow fans are multiple, the cross-flow fans are arranged at intervals in the horizontal direction, the air ports of the cross-flow fans face to a third direction, so that the air flow discharged from the air ports of the cross-flow fans has component speeds in the horizontal direction and the vertical direction, and the fertilizer droplets roll in the second direction in an overall wave manner under the action of the air flows of the cross-flow fans.

In a preferred embodiment, the at least one crossflow blower comprises a first crossflow blower having an opening in a first direction of fertilizer droplet ejection from the distributor.

In a preferred embodiment, the at least one crossflow blower further comprises a second crossflow blower disposed to one side of the first crossflow blower in a path of the fertilizer droplets rolling in the second direction; the air inlet of the first cross flow fan and the horizontal direction form a first included angle, the air inlet of the second cross flow fan and the horizontal direction form a second included angle, and the first included angle is larger than the second included angle.

In a preferred embodiment, the distributor comprises a discharge port, and the aperture of the discharge port is 1-4 mm.

In a preferred embodiment, the airflow medium of the crossflow blower is one or more of air, nitrogen or carbon dioxide gas.

In a preferred embodiment, the air-cooled drip granulation system further comprises a cooling device for cooling the fertilizer granules, the cooling device comprising a fluidized bed cooling device or a powder stream cooling device.

The utility model has the advantages that: the utility model provides an air current cooling granulation system that drips changes the direction of motion of fertilizer liquid drop through cross-flow fan's air current effect to form fertilizer granule in the rolling process cooling of second direction, it can reduce the production facility height compared in the granulation of the well tower of prior art, practices thrift the space, is compared in the steel band cooling and forms flat fertilizer granule, the utility model discloses a system can form the fertilizer granule of spherical granule.

Adopt the utility model discloses a system need not the prilling tower, and the volume and the construction cost of whole device are all little, and are with low costs. The high tower technology receives factors such as tower height to hardly produce the fertilizer granule more than 5 millimeters, the utility model discloses a system can produce bigger spherical particle, and produces more even spherical particle.

Drawings

Fig. 1 is a flow chart of an airflow cooling dripping granulation method provided by the present invention.

Fig. 2 is a schematic structural diagram of an airflow cooling drip granulation system according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of an airflow cooling drip granulation system according to another embodiment of the present invention.

Detailed Description

The following description is of the preferred embodiments of the present invention, and it should be noted that, for those skilled in the art, a number of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations are also considered to be the protection scope of the present invention.

Referring to fig. 1 and 2, an embodiment of the present invention provides an airflow cooling drip granulation method, which includes a step S100 and a step S200. The specific technical scheme is as follows.

Step S100, forming fertilizer liquid drops Q sprayed to a first direction A by a fluid fertilizer raw material through a distributor 100, wherein an included angle alpha between the first direction A and the horizontal direction is as follows: alpha is more than 0 degree and less than 180 degrees. The fluid fertilizer raw material refers to a fertilizer raw material which is melted at a high temperature to form a flowable molten state, and in some embodiments, the fluid fertilizer raw material is formed by adding a small amount of water or mixing a liquid fertilizer and a solid fertilizer. The components of the fluid fertilizer raw material comprise at least one of organic fertilizer, inorganic fertilizer, medium trace element fertilizer, microbial fertilizer and the like, and the specific components are prepared according to actual production needs.

In this embodiment, it is preferable that the included angle α between the first direction a and the horizontal direction is 80 ° to 90 °, and more preferably, the included angle α is 90 °, that is, the fertilizer droplets are vertically sprayed downward by the distributor.

Step S200, rolling the fertilizer liquid drops Q in a second direction B under the action of the airflow of at least one cross flow fan 200, and forming fertilizer particles in the rolling process, wherein an included angle beta between the second direction B and the horizontal direction is as follows: beta is more than or equal to 0 and less than 90, beta is less than alpha, and the cross-flow fan 200 is positioned below the distributing device 100. The fertilizer droplets roll in the second direction means that the fertilizer droplets roll in the second direction B in general, and in the actual production process, the fertilizer droplets are dispersively rolled in the second direction B, specifically, the rolling direction of each fertilizer droplet has a certain deviation, but all the fertilizer droplets roll in the second direction B in general. In this embodiment, the included angle β is preferably 0 to 10 °, more preferably 0 °, and the second direction B is parallel to the horizontal direction, that is, when the fertilizer droplets are ejected from the distributor 100 in a vertically downward direction, the fertilizer droplets are moved by the cross flow fan 200 to slow down the dropping speed of the fertilizer droplets in the vertically downward direction and roll in the horizontal direction, and gradually exchange heat with the air flow during the rolling process, so that the fertilizer droplets are transformed from fluid state to solid fertilizer particles, and the fertilizer particles are formed under the cooling of the air flow of the cross flow fan.

In order to reduce the height of the device, more than two sets of cross-flow fans are arranged in a staggered mode to meet the heat exchange condition required by changing the liquid phase of the fertilizer liquid drops into the solid phase, as shown in FIG. 2. In this embodiment, there are three crossflow blowers 200, and in other embodiments, the number of the crossflow blowers 200 may be set according to actual conditions, and the specific number is not limited.

In a further embodiment, said at least one crossflow blower 200 comprises a first crossflow blower 210, the air opening of said first crossflow blower 210 being located in a first direction a of the spray of fertilizer droplets Q by said distributor 100. So that the fertilizer droplets Q can pass through the air opening of the first cross flow fan 210 and be blown toward the second direction B by the airflow of the first cross flow fan 210 when falling. The first crossflow blower 210 is the one closest to the distributor 100 in the crossflow blower assembly, and is also the first crossflow blower providing an air flow for changing the movement direction of the fertilizer droplets.

The airflow of the first through-flow fan 210 has a horizontal speed and a vertical speed, and when the fertilizer droplets Q fall at the air opening of the first through-flow fan 210, the airflow of the first through-flow fan 210 reduces the vertical falling speed of the fertilizer droplets Q and drives the fertilizer droplets Q to roll in the second direction. When the air flow velocity of the first through-flow fan 210 is high, the air flow reduces the vertical downward partial velocity of the fertilizer droplets to zero, and makes the fertilizer droplets have a vertical upward velocity, and in addition, has a horizontal partial velocity, so that the second direction in which the fertilizer droplets roll forms an angle with the horizontal direction. When the fertilizer droplets roll in the horizontal direction for a certain distance and are far from the first through-flow fan 210, the fertilizer droplets are reduced by the airflow of the first through-flow fan 210, so that the rolling speed is reduced, and even the fertilizer droplets tend to fall. The number of crossflow blowers can be increased if the fertilizer droplets have not cooled to form fertilizer granules at this point. In this embodiment, three cross-flow fans are preferred, and the second cross-flow fan 220 is positioned at a position where the rolling speed is reduced, even when there is a drop of fertilizer droplets, and the airflow at the tuyere of the second cross-flow fan 220 again rolls the fertilizer droplets in the second direction to further cool and form fertilizer granules. Wherein the third crossflow blower 230 functions the same as the second crossflow blower 220. As shown in figure 2, the fertilizer liquid drops Q are enabled to integrally present the trend of rolling in a wave shape towards the second direction under the action of the airflow of the cross flow fan, and the fertilizer particles are formed by cooling in the rolling process.

In the present application, the airflow velocity of the first, second and third crossflow blowers 210, 220, 230 may be set according to the rate at which the fertilizer droplets fall and the size of the fertilizer droplets.

The utility model provides an air current cooling drippage granulation method changes the direction of motion of fertilizer liquid drop through cross-flow fan's air current effect to form fertilizer granule in the rolling process cooling of second direction, it can reduce the production facility height compared in the granulation of the well tower of prior art, practices thrift the space, is compared in the steel band cooling and forms flat fertilizer granule, the utility model discloses a method can form the fertilizer granule of spherical granule.

Adopt the utility model discloses a method need not the prilling tower, and the volume and the construction cost of whole device are all little, and are with low costs, owing to need not the prilling tower, and it is easy many that its tail gas treatment is high tower relatively. The high tower technology is difficult to produce the fertilizer granules with the thickness of more than 5 millimeters due to factors such as tower height, the utility model discloses a method can produce bigger spherical granules, and produce more even spherical granules. The spherical particles with different particle diameters can be obtained by replacing the discharge ports of different distributing devices, so that the production is more convenient.

In fig. 2, one distributor 100 and three crossflow blowers 200 are shown, and in other embodiments the number of distributors 100 and crossflow blowers 200 may be adjusted to meet different product requirements depending on the specific production volume.

In a further embodiment, a preset vertical distance is provided between the distributor 100 and the first through-flow fan 210, and the fertilizer droplets Q are ejected from the distributor 100 at a preset speed; the air flow cooling dripping granulation method further comprises the following steps:

determining the air flow velocity of the cross-flow fan 200 based on the preset vertical distance and the preset velocity to enable the fertilizer droplets Q to roll in a second direction and keep the fertilizer droplets intact until fertilizer granules are formed.

The utility model provides an air current of cross flow fan 200 is steady, even, no turbulent flow, and the axial length after a plurality of cross flow fan 200 make up is unrestricted. The length of the impeller in the cross-flow fan 200, namely the width of the airflow, can be selected at will according to different use requirements, the cross-flow fan has the characteristics of small volume, light weight, low noise and low energy consumption, the wind pressure and the wind volume can be achieved according to the requirements of users, and the cross-flow fan can be adjusted by frequency conversion when in use.

In the application, when a preset vertical distance exists between the distributor 100 and the first cross flow fan 210, and the fertilizer droplets have a preset speed, the airflow speed of the airflow can be controlled, so that the airflow can support the fertilizer droplets to move in the second direction and can not break the independent fertilizer droplets, the fertilizer droplets after changing the direction change phase change with the airflow sent by the cross flow fan 200 in the process of moving in the second direction, and the fertilizer droplets automatically shrink into a spherical ball in the phase change process.

In this embodiment, the speed of the cross-flow fan can be adjusted by the frequency converter, and the fertilizer droplets falling vertically (in this embodiment, the first direction is vertically downward) are not broken by the airflow when contacting the redirected airflow. Preferably, the cross-flow fan 200 discharges an air flow having a large air volume and a small air flow velocity.

In a further embodiment, the predetermined vertical distance is 1-10 meters, the predetermined velocity is greater than the air flow velocity, and the air flow velocity is 10-50 meters/second. Wherein the air speed refers to the air speed at that time, can be when using the utility model discloses the method real-time monitoring air speed.

In a further embodiment, the distributor comprises a discharge port, and the aperture of the discharge port is 1-4 mm. The diameter of the fertilizer liquid drop generated by the distributing device is 1-4 mm.

In further embodiments, the flow medium of crossflow blower 200 is one or more of air, nitrogen, or carbon dioxide gas.

In a further embodiment, the cross-flow fan 200 has a flow of air at a temperature of 20-40 ℃. Preferably, the cross-flow fan 200 has an airflow temperature of 25 °.

In a further embodiment, the air-cooled drip granulation method further comprises step S300.

Step S300, cooling the fertilizer granules by a cooling device 300, wherein the cooling device 300 comprises a fluidized bed cooling device 310 (shown in fig. 3) or a powder flow cooling device 320 (shown in fig. 2).

The spherical particles with the fertilizer liquid drop phase changed into solid are further cooled by a fluidized bed cooling device or a powder flow cooling device 320, and the particles can enter the next procedure after reaching the temperature required by the process.

In another embodiment, after the dropping speed of the fertilizer droplets vertically downward is reduced by the airflow of the first through-flow fan 210, the airflow cooling dropping granulation method further includes:

and solidifying the fertilizer droplets with the reduced speed to form fertilizer particles, dripping the fertilizer particles on a cooling belt, and continuously cooling, wherein the time from the outlet of the distributor to the cooling belt is 2-3 seconds. In this embodiment, two cooling modes of a cross-flow fan and a cooling zone are combined to cool the fertilizer droplets and the fertilizer particles, the cross-flow fan can ensure that the fertilizer droplets are cooled into spherical particles, and the cooling zone can further rapidly cool the spherical fertilizer particles, so that the compactness of the fertilizer particles is improved. Preferably, the cooling belt is a steel belt, and the cooling temperature of the steel belt is 5-20 °.

Referring to fig. 2, the present invention further provides an airflow cooling drip granulation system 10, where the airflow cooling drip granulation system 10 includes a distributor 100 and at least one cross-flow fan 200, the distributor 100 is configured to form a fertilizer droplet sprayed in a first direction from a fluid fertilizer raw material, an included angle α between the first direction and the horizontal direction is: alpha is more than 0 and less than 180. The at least one cross-flow fan 200 is used for rolling the fertilizer droplets in a second direction and forming fertilizer granules during rolling, wherein an included angle beta between the second direction and the horizontal direction is as follows: beta is more than or equal to 0 and less than 90, beta is less than alpha, and the cross-flow fan 200 is positioned below the distributing device 100.

In this embodiment, it is preferable that the included angle α between the first direction a and the horizontal direction is 80 ° to 90 °, and more preferably, the included angle α is 90 °, that is, the fertilizer droplets are vertically sprayed downward by the distributor 100.

The fertilizer droplets roll in the second direction means that the fertilizer droplets roll in the second direction B, and in the actual production process, the fertilizer droplets are dispersible and roll in the second direction B, specifically, the rolling direction of each fertilizer droplet has a certain deviation, but all the fertilizer droplets roll in the second direction B. In this embodiment, the included angle β is preferably 0 to 10 °, more preferably 0 °, and the second direction B is parallel to the horizontal direction, that is, when the fertilizer droplets are ejected from the distributor in a vertically downward direction, the fertilizer droplets are moved by the cross flow fan to slow down the dropping speed of the fertilizer droplets in the vertically downward direction and roll in the horizontal direction, and gradually exchange heat with the air flow during the rolling process, so that the fertilizer droplets are transformed from a fluid state to solid fertilizer particles, and the fertilizer particles are formed under the cooling of the air flow of the cross flow fan.

In a further embodiment, the number of crossflow blowers 200 is multiple, the crossflow blowers 200 are arranged at intervals in the horizontal direction, the air inlets of the crossflow blowers 200 face the third direction C, so that the air flow discharged from the air inlets of the crossflow blowers 200 has a partial velocity in the horizontal direction and the vertical direction, and the fertilizer droplets Q roll in the second direction in an overall wave manner under the action of the air flow of the crossflow blowers 200.

The utility model provides an air current cooling granulation system that drips changes the direction of motion of fertilizer liquid drop through cross-flow fan 200's air current effect to form fertilizer granule in the rolling process cooling of second direction, it can reduce the production facility height compared in the granulation of the well tower of prior art, practices thrift the space, compares in the steel band cooling formation flat fertilizer granule, the utility model discloses a system can form the fertilizer granule of spherical granule.

In a further embodiment, the at least one crossflow blower comprises a first crossflow blower 210, the air opening of the first crossflow blower 210 being located in a first direction of the fertilizer droplet ejection by the distributor 100.

In a further embodiment, the at least one crossflow blower further comprises a second crossflow blower 220, the second crossflow blower 220 being disposed to one side of the first crossflow blower 210 and in the path of the fertilizer droplets rolling in the second direction; the air opening of the first cross flow fan 210 has a first included angle with the horizontal direction, the air opening of the second cross flow fan 220 has a second included angle with the horizontal direction, and the first included angle is larger than the second included angle. Since the first crossflow blower 210 is the first crossflow blower for changing the path of the fertilizer droplets, a larger angle is formed between the air opening of the first crossflow blower 210 and the horizontal direction so that the fertilizer droplets can roll in the second direction, and when the fertilizer droplets passing through the first crossflow blower 210 for changing the movement path roll to the second crossflow blower 220, a larger air velocity is not required, so that the air opening of the second crossflow blower 220 can be formed with a smaller angle to the horizontal direction.

In a further embodiment, the distributor comprises a discharge port, and the aperture of the discharge port is 1-4 mm.

In a further embodiment, the air flow medium of the crossflow blower is one or more of air, nitrogen or carbon dioxide gas.

In a further embodiment, the airflow cooling drip granulation system further comprises a cooling device, the cooling device is arranged on one side of the last cross-flow fan far away from the first cross-flow fan and used for cooling the fertilizer particles, and the cooling device comprises a fluidized bed cooling device or a powder flow cooling device.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (7)

1. An air-cooled drip granulation system, comprising:

the distributing device is used for forming fertilizer liquid drops sprayed to a first direction from fluid fertilizer raw materials through the distributing device, and an included angle alpha between the first direction and the horizontal direction is as follows: alpha is more than 0 and less than 180;

at least one cross-flow fan for rolling the fertilizer droplets in a second direction and forming fertilizer granules during rolling, wherein an angle beta between the second direction and the horizontal direction is: beta is more than or equal to 0 and less than 90, beta is less than alpha, and the cross-flow fan is positioned below the distributing device.

2. The forced-air cooled drip pelletizing system of claim 1 wherein the crossflow blower is a plurality of blowers, the plurality of crossflow blowers being spaced apart in a horizontal direction in a sequential manner, the air inlets of the plurality of crossflow blowers being oriented in a third direction such that the air exiting the air inlets of the crossflow blowers has a component velocity in a horizontal direction and a vertical upward direction, and wherein the fertilizer droplets collectively roll in an undulating manner in the second direction under the influence of the air flows of the plurality of crossflow blowers.

3. An air-cooled drip granulation system as defined in claim 1, wherein said at least one cross-flow fan comprises a first cross-flow fan having a port positioned in a first direction of fertilizer droplet ejection from said distributor.

4. The airflow-cooled drip pelletizing system of claim 3 wherein the at least one crossflow blower further comprises a second crossflow blower disposed to one side of the first crossflow blower and in the path of the fertilizer droplets rolling in the second direction; the air inlet of the first cross flow fan and the horizontal direction form a first included angle, the air inlet of the second cross flow fan and the horizontal direction form a second included angle, and the first included angle is larger than the second included angle.

5. An air-cooled drip granulation system as claimed in claim 1, wherein said distributor comprises a discharge orifice, the aperture of said discharge orifice being 1-4 mm.

6. The air-cooled drip granulation system of claim 1, wherein the air flow medium of said crossflow blower is one or more of air, nitrogen or carbon dioxide gas.

7. An air-cooled drip granulation system as defined in claim 1, further comprising cooling means disposed on a side of the last crossflow blower remote from the first crossflow blower for cooling the fertilizer particles, said cooling means comprising fluidized bed cooling means or powder stream cooling means.

Images