CN217068765U - Compound fertilizer prilling tower with secondary air cooling and dust adsorption function - Google Patents

Abstract

The utility model discloses a compound fertilizer prilling tower with secondary forced air cooling and dust adsorb function, include: the method comprises the following steps: the tower comprises a tower body, wherein a spray header for spraying compound fertilizer melting slurry is arranged at the top of the tower body, a primary cold air inlet is arranged at the bottom of the tower body, a plurality of secondary cold air inlets are uniformly distributed on the wall of the tower body, which is positioned at the height position of the lower end of a constant-temperature area between the spray header and the primary cold air inlet, on the tower wall of the tower body, and the air outlet directions of the secondary cold air inlets are obliquely arranged upwards. By arranging the secondary cold air inlet, a proper amount of cold air can be added into the constant-temperature area, so that the temperature difference of the melt material can be accelerated, the crystallization and condensation efficiency of the melt can be accelerated, the granulation effect is improved, and the continuous crystallization on the surface of the material is realized, so that the dust volatilization is reduced; in addition, the falling material after secondary cooling has lower temperature and higher particle strength when falling to the bottom of the tower, and is beneficial to material collection.

Description

Compound fertilizer prilling tower with secondary air cooling and dust adsorption function

Technical Field

The utility model relates to a compound fertilizer prilling tower technical field, more specifically the compound fertilizer prilling tower with secondary forced air cooling and dust adsorption function that says so relates to.

Background

A core device of a high tower compound fertilizer production process is a granulation tower body, and the principle is that molten urea or ammonium nitrate and powdery monoammonium phosphate, potassium chloride, potassium sulfate and the like can form low eutectic compounds, N, P, K nutrient eutectic with good fluidity is generated by metering, mixing and mixing the ingredients, and the eutectic is sprayed into the granulation tower body by a special granulator and is cooled, crystallized and solidified into compound fertilizer particles with uniform nutrients by countercurrent air.

The compound fertilizer molten slurry is dropped at about 130 ℃ on a top spraying layer (3-4 layers of top operating layer with total height of about 18-21 m, the lowest layer of top operating layer is spraying layer), the temperature is from high to low, in a certain middle area (30-50 m below a platform of the spraying layer and about 20 m in height), the temperature of cooling air entering from the bottom of the tower is in a balanced state (see a shadow area in figure 1) after heat exchange with molten liquid dropped on the tower, the heat exchange capacity in the range is poor, the crystallization process of the molten liquid is easy to stop, gas with dust is volatilized from the surface of the molten liquid, dust gas moving upwards is not easy to be absorbed by a top washing device and discharged to air, the discharged gas is difficult to reach the national emission standard, the gas is easy to be bonded on the wall of the tower in the tower body, and the granulation effect of the fertilizer is influenced.

Therefore, the technical personnel in the field need to solve the problem of how to provide a compound fertilizer prilling tower with secondary air cooling and dust adsorption functions, which can improve the prilling effect and reduce the dust emission.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a compound fertilizer prilling tower that has secondary air cooling and dust adsorption function that can improve the granulation effect, and can reduce dust emission.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a compound fertilizer prilling tower with secondary air cooling and dust adsorption function includes: the tower body, the tower body top is equipped with the shower nozzle that is used for spraying compound fertilizer melting ground paste, the tower body bottom is equipped with the import of primary cold wind, be located on the tower wall of tower body the shower nozzle with the equipartition is equipped with a plurality of secondary cold wind imports, and is a plurality of on the tower wall of the constant temperature region lower extreme high position between the import of primary cold wind secondary cold wind's air-out direction is upwards arranged to one side.

According to the technical scheme, compared with the prior art, the utility model discloses a compound fertilizer prilling tower with secondary air cooling and dust adsorption function, through setting up secondary cold wind import, can add appropriate amount of cold wind to the constant temperature region (see the shadow part in fig. 1), can accelerate the difference in temperature of melt material and accelerate the efficiency of melt crystallization condensation, improve the granulation effect to also make the material surface continue to crystallize and reduce the dust and volatilize; in addition, the falling material after secondary cooling is lower in temperature and higher in particle strength when falling to the bottom of the tower, so that the material collection is facilitated.

Furthermore, every on the tower body the secondary cold wind import all is connected to a plurality of air-coolers that have cold wind and take static function through the pipeline.

The beneficial effects that adopt above-mentioned technical scheme to produce are that, the operation of blowing of every secondary cold wind import can be controlled respectively, and control is nimble, and the cold wind that the air-cooler blew off has the static function, when making the cold wind that the secondary cold wind import blew off upwards blow, the aerosol class dust that volatilizees forms great granule or whereabouts because of electrostatic adsorption or is adsorbed by top of the tower washing device majority before the top of the tower discharges to the outside atmosphere of tower, the emission of the dust that has significantly reduced, make the dust discharge reach emission standard.

Furthermore, the tower wall of the tower body is internally provided with a plurality of annular air pipes communicated with the secondary cold air inlet, and the annular air pipes are communicated with air outlets of air coolers with cold air with a static function on the tower body.

Adopt the beneficial effect that above-mentioned technical scheme produced, the air-cooler advances to blow to annular tuber pipe with cold wind in, then blow out through a plurality of secondary cold wind imports, consequently only need an air-cooler can realize the blowing of a plurality of secondary cold wind imports, but greatly reduced manufacturing cost, and the cold wind that the air-cooler blew out has the static function, when making the cold wind that the secondary cold wind import blew out blow, the aerosol class dust of volatilizing forms great granule or whereabouts or is adsorbed by top of the tower washing device most before the top of the tower is arranged in the tower outside atmosphere because of electrostatic adsorption, the emission of dust has significantly reduced, make the dust emission reach emission standard.

Further, the spraying angle alpha of the spraying head is 130 degrees.

Further, the upward inclined angle beta of the secondary cold air inlet is 50-88 degrees.

Further, the upward inclined angle beta of the secondary cold air inlet is 70 degrees.

The technical scheme has the beneficial effect that the radian range of the material sprayed by the spray header is ensured to be within the range of the secondary cold air inlet blowing cold air upwards.

Further, the distance between the secondary cold air inlet and the spray header is 30-50 m.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without paying any creative work.

Fig. 1 is a schematic view of a compound fertilizer prilling tower with secondary air cooling and dust adsorption functions provided by the utility model.

Fig. 2 is an enlarged schematic view of a part a in fig. 1.

Fig. 3 is a schematic top view of fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

Referring to fig. 1-3, the embodiment of the utility model discloses compound fertilizer prilling tower with secondary air-cooling and dust absorption function includes: the tower comprises a tower body 1, wherein a spray header 2 used for spraying compound fertilizer melting slurry is arranged at the top of the tower body 1, a primary cold air inlet 3 is arranged at the bottom of the tower body 1, a plurality of secondary cold air inlets 4 are uniformly distributed on the tower wall of the tower body 1 at the height position of the lower end of a constant temperature area between the spray header 2 and the primary cold air inlet 3, and the air outlet directions of the secondary cold air inlets 4 are obliquely and upwards arranged.

Every secondary cold wind import 4 on the tower body 1 all is connected to a plurality of air-coolers that have the cold wind of making and take static function through the pipeline.

An annular air pipe communicated with the plurality of secondary cold air inlets 4 is arranged in the tower wall of the tower body 1, and the annular air pipe is communicated with an air outlet of an air cooler which is arranged on the tower body 1 and has a cold air producing function with a static electricity function.

The spray angle α of the shower head 2 is 130 °.

The upward inclined angle beta of the secondary cold air inlet 4 is 50-88 degrees.

The air outlet nozzle of the secondary cold air inlet 4 inclined upwards is adjusted at an angle beta + - ((beta/2)), for example, the angle is 70 degrees.

The distance between the secondary cold air inlet 4 and the spray header 2 is 30-50 m.

The principle of the compound fertilizer granulation tower is as follows: the primary cold air inlet blows cold air upwards, materials sprayed by the spray header are crystallized and solidified into compound fertilizer particles after passing through the cold air, and in the process, the secondary cold air inlet also blows a proper amount of cold air with an electrostatic function upwards, so that a proper amount of cold air can be added into a constant temperature area (see the shadow part in figure 1) in the tower body, the temperature difference of melt materials is accelerated, the crystallization and condensation efficiency of the melt is accelerated, the granulation effect is improved, and the continuous crystallization of the surface of the materials is also enabled to reduce dust volatilization; meanwhile, when cold air with a static function blown out from the secondary cold air inlet blows upwards, volatilized aerosol dust forms larger particles due to electrostatic adsorption or falls down or is mostly adsorbed by the tower top washing device before being discharged to the atmosphere outside the tower from the tower top, so that the dust emission is greatly reduced, the dust emission reaches the emission standard, in addition, the temperature is lower when the falling material is reduced to the tower bottom after secondary cooling, the particle strength is higher, and the material collection is facilitated.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. A compound fertilizer prilling tower with secondary air cooling and dust adsorption function, its characterized in that includes: the tower body (1), tower body (1) top is equipped with shower head (2) that are used for spraying compound fertilizer melting ground paste, tower body (1) bottom is equipped with once cold wind import (3), be located on the tower wall of tower body (1) shower head (2) with the equipartition is equipped with a plurality of secondary cold wind import (4) on the tower wall of the constant temperature region lower extreme high position between once cold wind import (3), and is a plurality of the air-out direction slant of secondary cold wind import (4) upwards arranges.

2. The compound fertilizer prilling tower with the functions of secondary air cooling and dust adsorption according to claim 1, wherein each secondary cold air inlet (4) on the tower body (1) is connected to a plurality of air coolers with cold air static electricity function through pipelines.

3. The compound fertilizer prilling tower with the functions of secondary air cooling and dust adsorption according to claim 1, wherein an annular air pipe communicated with the plurality of secondary air cooling inlets (4) is arranged inside the tower wall of the tower body (1), and the annular air pipe is communicated with an air outlet of an air cooler with a static function of cold air on the tower body (1).

4. The compound fertilizer prilling tower with secondary air cooling and dust adsorption functions as claimed in claim 1, wherein the spraying angle α of the spray header (2) is 130 °.

5. The compound fertilizer prilling tower with secondary air cooling and dust adsorption functions as claimed in claim 4, wherein the angle β of upward inclination of the secondary air cooling inlet (4) is 50-88 °.

6. The compound fertilizer prilling tower with secondary air cooling and dust adsorption functions as claimed in claim 5, wherein the angle β of upward inclination of the secondary air inlet (4) is 70 °.

7. The compound fertilizer prilling tower with secondary air cooling and dust adsorption functions as claimed in claim 1, wherein the distance between the secondary air cooling inlet (4) and the spray header (2) is 30-50 m.

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