CN105233756B - A kind of granulating system and its method - Google Patents
A kind of granulating system and its method Download PDFInfo
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- CN105233756B CN105233756B CN201510739465.3A CN201510739465A CN105233756B CN 105233756 B CN105233756 B CN 105233756B CN 201510739465 A CN201510739465 A CN 201510739465A CN 105233756 B CN105233756 B CN 105233756B
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Abstract
The invention discloses a kind of granulating system and its method, belong to field of fertilizer production, the granulating system includes tower body, feed arrangement, material-receiving device, and the cross section of tower body is polygon, at least two shower nozzles are provided with tower body top perimeter, the charging aperture of shower nozzle is connected with the discharging opening of feed arrangement；It is arranged on the discharge pipe at the top of tower body and bypasses and extends to outside tower body at the top of tower body, turned on the desuperheat dehumidifier outside tower body, the gas outlet of desuperheat dehumidifier is connected with the air inlet of air-introduced machine, air-introduced machine is located at the outer position close to tower body bottom of tower body, air-introduced machine is connected with tower body inner chamber, and deduster is added on discharge pipe, the powder outlet of deduster is connected with feed arrangement.The granulating system of the present invention, tower body height reduces 20% 50%, and tower body maximum radius is less than 8 meters, and granulation is not influenceed by season and weather, can preferably solve the various problems that high-tower granulation production chemical fertilizer runs into, realize the safety and stability production of composite fertilizer.
Description
Technical field
The invention belongs to field of fertilizer production, more particularly to a kind of granulating system and its side for composite heat transfer
Method.
Background technology
At present, Granulation Equipments used in chemical fertilizer industry production granular chemical fertilizer is broadly divided into comminutor and granulation tower.Granulation
Tower is because simple in construction, and energy-conserving and environment-protective use more universal.The country for composite heat transfer it is more be high tower, tower granulation
The tower height of technique typically has 90-130 meters, according to production-scale difference, and tower diameter is typically between 16-22 meters.Tower granulation work
Skill is mellow and full with its particle appearance, and balling ratio is high, and returning charge is few etc. is clearly distinguishable from the advantages of other prilling process.But with high tower
The popularization of technology, the shortcoming of high tower starts significantly to be exposed, such as：1. because using self-heating ventilation, by air themperature humidity
Influence is larger, and particularly summer time summer is forced to stop production；2. high tower is difficult on conveying material, easily blocks, Solid Conveying and Melting is costly,
Configuration power set also increase, and maintenance of equipment is inconvenient, and because tower body is high, tower diameter is big, ventilation it is big, it is necessary to blower fan it is many, into
This height；3. product particle is uneven；4. operating flexibility is little；5. the recovery of waste material is inconvenient, and environment is nor very well；6. granulate
Tower cost is high, and plant investment is higher；7. it is high to ground processing requirement, settled to easily there is irregular geology；8. exist certain
Potential safety hazard, occur explosion accident in succession, high tower explosion accident there occurs if the enterprise of Hubei such as 19 days 2 months 2015.For
The problem of solution high-tower granulation is present, someone devises low tower Granulation Equipments, but this low tower granulating system is, it is necessary to install
The blower fan of 30 or so, substantially increases granulation cost, allows chemical fertilizer production enterprise to hang back, and low tower granulation is only rested on and sets
Meter aspect, no actual application prospect.
The content of the invention
In order to overcome the problem of existing Low Towers granulation is present, the invention discloses a kind of high-tower granulation system of modified form
And its method, tower body height reduction 20%-50%, the circumradius of the tower body cross section is no more than 8 meters, and granulation is not by season
With the influence of weather, the various problems that high-tower granulation production chemical fertilizer runs into can be preferably solved, and equipment safety is reliable, does not have
There is explosion danger.
The present invention is achieved through the following technical solutions.
A kind of granulating system, including tower body, feed arrangement, material-receiving device, the cross section of the tower body is polygon, in institute
Tower body top perimeter is stated provided with least two shower nozzles, depending on the quantity of shower nozzle is according to production capacity, granulation column overhead center is not set
Shower nozzle is put, the charging aperture of the shower nozzle is connected with the discharging opening of feed arrangement；The discharge pipe for being arranged on tower body top perimeter is bypassed
Turned at the top of tower body with the desuperheat dehumidifier outside tower body, the gas outlet of the desuperheat dehumidifier is connected with the air inlet of air-introduced machine,
The air-introduced machine is located at the outer position close to tower body bottom of tower body, and the air-introduced machine is connected with tower body inner chamber, and in the air-out
Deduster is set on pipe, and the powder outlet of the deduster is connected with feed arrangement, for realizing tail gas generated by granulation first through dry method
Dedusting is removed after dust therein entrainment, delivers to desuperheat dehumidifier cooling and dehumidification, then by the tail gas after processing through air-introduced machine from tower
Body bottom enters granulation tower inner chamber, rises in tower body inner chamber and granulation solution slurry counter current contacting, cooling and solidifying granulation, granulation
The dust-containing tail gas formed afterwards goes successively to deduster, and the dust that deduster is collected is delivered into feed arrangement, realizes that tail gas is high
Effect is recycled；Wherein described granulating system can use frame structure, and its tower wall can be by alloy sheets or high polymer material plate
It is spliced, the refrigerant of desuperheat dehumidifier can be using liquefied ammonia, ammoniacal liquor, cooling water, methanol etc..
Certainly the need for according to actual condition, the blow-down pipe that is provided with and can adjust can be exported in air-introduced machine.
As a kind of preferred embodiment, the number of the shower nozzle is no more than four times of tower body polygonal crosssection side number.
In the present invention tower top periphery set discharge pipe be it is distinguished and admirable in order to form similar piston type in cooling air granulation tower,
And the wind speed of tower circumference is slightly above tower body center wind speed, ring-type ascending air is formed in tower body, when granulated pellet is passed through
Desuperheat decelerating effect substantially, is conducive to particle to solidify the viscous tower of reduction as early as possible, and make particle level direction point when vane is close to tower wall
Speed reduce, the approach angle with granulation tower is further reduced, chemical fertilizer granule in granulation tower by downward gravity and upwards
Buoyancy, the collective effect of up-draught power and the resistance opposite with the direction of motion, the level run speed of particle revolved by shower nozzle
Rotary speed influences, much smaller than the vertical speed of particle proximate freedom falling bodies.Shower nozzle is set by tower diameter and produce load
Rotary speed.
Granulation column overhead uses closure designs, and discharge pipe can be one or more, if setting multiple air-out in tower top
Pipe, discharge pipe can be penetrated in tower top surrounding, be easy to preferably draw the tail gas in tower body inner chamber, and regulation and control for convenience can be by
Tail gas in the multiple discharge pipes drawn is pooled in a total discharge pipe, then carries out dedusting, desuperheat dehumidification, recycling.
Different designs are carried out to feed arrangement, it is possible to produce different composite fertilizers, one of which design method is
Feed arrangement includes phosphate fertilizer dissolving tank, potash fertilizer dissolving tank and granulation solution blender, the liquid outlet and potassium of the phosphate fertilizer dissolving tank
The inlet connection of fertile dissolving tank, the liquid outlet of the potash fertilizer dissolving tank is connected with the inlet of granulation solution mixing channel, described
The powder outlet of deduster is connected with the charge door of granulation solution mixing channel.
By nitrogenous fertilizer（Such as ammonium nitrate, urea）Solution dissolves with phosphate fertilizer in phosphate fertilizer dissolving tank forms binary nutrient solution, so
Binary nutrient solution overflow to the potash fertilizer of potash fertilizer dissolving tank and addition is mixed to form ternary nutrient solution afterwards, and ternary nutrient solution overflows
Granulation solution mixing channel is flow to, and the powder being collected into deduster is recovered to granulation solution mixing channel, it is compound in order to improve
The performance of fertilizer, can also add various additives, trace element, anti-explosion explosion-suppression agent etc. into granulation solution.
Because granulation needs batch mixing uniform component and water content can not be too high, it can be added in granulation solution mixing channel
Hot coil and agitator, the homogeneous granulation batch mixing of forming component, each shower nozzle is assigned in granulation tower by the valve of bottom land
Granulation；The vaporising device of nitrogenous fertilizer solution, such as ammonium nitrate solution vapo(u)rization system, urea liquid evaporation system can also be set in tower top
System, dissolves each other with phosphate fertilizer, potash fertilizer after tower top is by nitrogenous fertilizer solution concentrate and is granulated, the chemical fertilizer products of production nitro and urine base.
As a kind of preferred scheme, what the material-receiving device was integrally formed with tower body, naturally it is also possible to pass through welding etc.
Other modes are tightly connected, and the material-receiving device can be by shell, shutter air inlet, swash plate and bottom discharge mouthful
Composition, the shutter air inlet is placed between two swash plates, reached by adjusting the aperture of shutter air inlet control into
The purpose of air quantity, swash plate makes product particle not omitted from shutter, farthest ensures that product particle only passes through bottom
Discharge hole for discharge, is easy to being uniformly processed for later stage.
As a kind of preferred embodiment, the shower nozzle is Horizontal revolving cartridge type shower nozzle, and shower nozzle is distributed in tower body polygon top
On the sideline and/or summit in portion.
In view of the convenience of construction, it is square or rectangular that granulation tower can be designed to tower body cross section.
Shower nozzle is located at tower body cross section for polygonal top perimeter, and uses desuperheat dehumidifier processing tail gas, Ke Yiyou
The reduction tower diameter and tower height of effect, make the height of tower body be no more than 90 meters, the circumradius of the tower body cross section is no more than 8
Rice.
It is a further object of the present invention to provide a kind of method granulated using above-mentioned granulating system, by feed arrangement
Batch mixing sprayed by the shower nozzle of tower body top perimeter into tower, with bottom of towe enter cold air counter current contacting, rapid curing crystallization
Tower body is discharged by drawing mechanism；Granulate the tail gas produced and dust is separated by deduster, the tail gas of removing dust, which is cooled, to be removed
Enter tower body inner chamber from tower body bottom after water, the drop produced as cooling air to sprinkling pelleting continues counter current contacting；Dedusting
The dust that device is isolated is added to be dissolved in feed arrangement and granulated again.
The granulating system of the present invention, the cylinder design theory that its tower body discards tradition is designed using hollow square body,
And shower nozzle is located to the periphery of tower top, in the case where not reducing granulation jet length, tower diameter can reduce half；Granulation is produced
Tail gas recycled, powder continue on for after being recovered granulation, the tail gas after dedusting after desuperheat dehumidification, continue return
Rise to tower body inner chamber makes material-heat-exchanging in tower body inner chamber more abundant with granulation solution slurry counter current contacting, cooling and solidifying granulation,
Waste gas utilization is more efficient, requirement to granulating system tower body height reduction, effectively reduces tower body height, and granulation production no longer by
The influence of air themperature humidity；Due to the reduction of tower diameter and tower body height, substantially reduce the rate of air circulation in tower body inner chamber,
So that can just adjust air flow in whole tower body inner chamber well only with an air-introduced machine in the present invention, granulation needs are met
Cold air amount, be compared in low tower forced ventilation prilling be up to 32 highly energy-consumings air-introduced machine, reduce and be produced into
Sheet and equipment failure rate.
Liquefied ammonia can preferably can be evaporated to by the desuperheat dehumidifier of the present invention using the heat energy that tail gas is carried after dedusting
Gas ammonia is supplied to production and application, and 0.9-1.3Mpa liquefied ammonia can be evaporated to 0.35-0.65Mpa gas by such as desuperheat dehumidifier
Ammonia, can carry out liquefied ammonia evaporation supply nitric acid, ammonium nitrate, urea production as a kind of preferred scheme and use, and with needed for granulation
Ammonium nitrate, urea solution preparing device Joint Production.
The granulating system of the present invention, is not influenceed by temperature, humidity, season and weather, it is ensured that continuous production, tower height drop
Low, conveying material is more simple and convenient, has larger operating flexibility using Horizontal revolving cartridge type shower nozzle, can be in 50%-120% loads
Powder in stable operation, tail gas is all reclaimed to be granulated again, and tail gas can be reused by dedusting, even if straight by emptying
Running in, it is also environmentally safe to put, compared with traditional high-tower granulation, not only substantially reduces investment, and being capable of safety and stability production.
Brief description of the drawings
Fig. 1 be the embodiment of the present invention in granulating system structural representation.
In figure：1. tower body, 2. Horizontal revolving cartridge type shower nozzles, 3. granulation solution mixing channels, 4. potash fertilizer dissolving tanks, 5. phosphate fertilizer dissolve
Groove, 6. first discharge pipes, 7. second discharge pipes, 8. nonaqueous dust cleaners, 9. desuperheat dehumidifiers, 10. air-introduced machines, 11. shells, 12.
Shutter air inlet, 13. swash plates, 14. discharging openings.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Granulating system as shown in Figure 1, including tower body 1, feed arrangement, material-receiving device, 1 high 65 meter of tower body, its cross section
For the square that the length of side is 7 meters；Feed arrangement includes phosphate fertilizer dissolving tank 5, potash fertilizer dissolving tank 4 and granulation solution mixing channel 3, phosphate fertilizer
The liquid outlet of dissolving tank 5 is connected with the inlet of potash fertilizer dissolving tank 4, liquid outlet and the granulation solution mixing channel 3 of potash fertilizer dissolving tank 4
Inlet connection；The cross section of tower body 1 is square, and a horizontal revolving drum is respectively equipped with four summits of square tower top
The discharge pipe 6 of type shower nozzle 2 and first；Four the first discharge pipes 6 converge to the second discharge pipe 7 and bypass tower body 1 and push up after tower top extraction
Portion is extended to outside tower body, is turned on the desuperheat dehumidifier 9 outside tower body 1, the gas outlet of desuperheat dehumidifier 9 and entering for air-introduced machine 10
Gas port is connected, and the gas outlet of air-introduced machine 10 is connected with the inner chamber of tower body 1, and air-introduced machine 10 is located at the outer position close to tower body bottom of tower body
Put, and add on the second discharge pipe 7 nonaqueous dust cleaner 8, powder outlet and the granulation solution mixing channel 3 of nonaqueous dust cleaner 8
Charge door is connected；Material-receiving device is made up of shell 11, shutter air inlet 12, swash plate 13 and bottom discharge mouth 14, blinds
Window air inlet 12 is placed between two swash plates 13.
The production technology of this granulating system is：The ammonium nitrate solution of other workshop sections is flow in phosphoric acid dissolving tank 1 and addition
Solid phosphate fertilizer mixes molten formation binary fertilizer solution altogether in the presence of agitator；The overflow of binary fertilizer solution is to potash fertilizer dissolving tank
Mix molten formation ternary fertilizer solution altogether in 4 in the presence of agitator with the solid potash fertilizer of addition；Ternary fertilizer solution overflow
Mixed to granulation solution mixing channel 3 with the powder reclaimed in nonaqueous dust cleaner 8, and add the trace elements such as boron, silicon thereto and stirred
Mix uniform, and heating evaporation obtains the moderate batch mixing of water content；Batch mixing, which is assigned in four Horizontal revolving cartridge type shower nozzles, to be sprayed
Granulation, the drop that sprinkling pelleting is produced and the cold air counter current contacting entered from bottom of towe are drenched, complex fertilizer product is solidify to form and falls on
Be collected in the material-receiving device of bottom of towe, subsequent treatment；In granulation process, cold air is heated and carries micro composite fertilizer's powder
Dirt, enters nonaqueous dust cleaner 8 by the discharge pipe of tower top, dust is separated in nonaqueous dust cleaner, sends into granulation solution
Mixing channel 3 is dissolved to be granulated again；Tail gas after dedusting enters desuperheat dehumidifier 9 by pipeline, is removed again by first desuperheat
The drop continuation cooling that granulation tower intracavity bottom is produced as cooling air to sprinkling pelleting is blasted by air-introduced machine 10 after water.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (6)
1. a kind of prilling process, is realized by granulating system, the granulating system includes tower body, feed arrangement, splicing dress
Put, it is characterised in that：The cross section of the tower body is polygon, and at least two horizontal revolving drums are provided with the tower body top perimeter
Type shower nozzle；The feed arrangement includes phosphate fertilizer dissolving tank, potash fertilizer dissolving tank and granulation solution blender, the phosphate fertilizer dissolving tank
Liquid outlet is connected with the inlet of potash fertilizer dissolving tank, the liquid outlet of the potash fertilizer dissolving tank and the inlet of granulation solution mixing channel
Connection, the charging aperture of the Horizontal revolving cartridge type shower nozzle is connected with the discharging opening of granulation solution mixing channel；It is arranged on week at the top of tower body
The nonaqueous dust cleaner that the discharge pipe on side bypasses at the top of tower body and outside tower body is turned on, outlet and the desuperheat dehumidification of the nonaqueous dust cleaner
Device is connected, and the gas outlet of the desuperheat dehumidifier is connected with the air inlet of air-introduced machine, and it is outer close to tower that the air-introduced machine is located at tower body
The position of body bottom, the air-introduced machine is connected with tower body inner chamber, and the powder outlet of the nonaqueous dust cleaner is mixed with granulation solution
The charge door connection of groove, the desuperheat dehumidifier is used to liquefied ammonia being evaporated to gas ammonia and the ammonium nitrate needed for granulation, urea liquid system
Standby device Joint Production；
The prilling process is achieved by the steps of：
（1）Ammonium nitrate solution is flow in phosphoric acid dissolving tank mixes molten altogether formed with the solid phosphate fertilizer added in the presence of agitator
Binary fertilizer solution；The overflow of binary fertilizer solution is mixed into potash fertilizer dissolving tank with the solid potash fertilizer of addition in the presence of agitator
Amount to molten formation ternary fertilizer solution；The overflow of ternary fertilizer solution is reclaimed into granulation solution mixing channel 3 and nonaqueous dust cleaner 8
Powder mixing, and add into the granulation solution mixing channel additive, trace element, anti-explosion explosion-suppression agent, and heating evaporation
Obtain the moderate batch mixing of water content；
（2）Step（1）Resulting batch mixing is sprayed into tower by the Horizontal revolving cartridge type shower nozzle of tower body top perimeter, is entered with bottom of towe
Cold air counter current contacting, solidify to form complex fertilizer product fall in the material-receiving device of bottom of towe be collected, subsequent treatment；Granulation
During, cold air is heated and carries micro composite fertilizer's dust, enters nonaqueous dust cleaner by the discharge pipe of tower top, dry
Dust is separated in method deduster, and feeding granulation solution mixing channel is dissolved to be granulated again；Tail gas after dedusting leads to
Pipeline is crossed into desuperheat dehumidifier, blasting granulation tower intracavity bottom by air-introduced machine after first desuperheat is removed water again is used as cooling sky
The drop that gas is produced to sprinkling pelleting continues counter current contacting.
2. prilling process as claimed in claim 1, it is characterised in that：The number of the Horizontal revolving cartridge type shower nozzle is no more than tower body
Four times of polygonal crosssection side number.
3. prilling process as claimed in claim 1, it is characterised in that：The Horizontal revolving cartridge type shower nozzle is distributed in tower body polygon
On the sideline and/or summit at top.
4. prilling process as claimed in claim 3, it is characterised in that：The cross section of the tower body is rectangle, described rectangular
Shape length-width ratio is 1:1~2:1.
5. prilling process as claimed in claim 3, it is characterised in that：The height of the tower body is no more than 90 meters.
6. prilling process as claimed in claim 5, it is characterised in that：The circumradius of the tower body cross section is no more than 8
Rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510739465.3A CN105233756B (en) | 2015-11-04 | 2015-11-04 | A kind of granulating system and its method |
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| CN201510739465.3A CN105233756B (en) | 2015-11-04 | 2015-11-04 | A kind of granulating system and its method |
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| CN105233756A CN105233756A (en) | 2016-01-13 |
| CN105233756B true CN105233756B (en) | 2017-10-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107899509B (en) * | 2017-11-06 | 2024-06-21 | 宜昌林峰设备制造有限公司 | Dry-method granulator and control method |
| CN109912142A (en) * | 2019-04-24 | 2019-06-21 | 福建南方路面机械有限公司 | A kind of granular curing apparatus of sludge with low moisture content and prilling process |
| CN112742302A (en) * | 2021-01-07 | 2021-05-04 | 黄超 | Aluminum oxide powder granulator |
| CN113004104B (en) * | 2021-03-19 | 2024-01-02 | 深圳市芭田生态工程股份有限公司 | Low-tower-made small-granule process of fertilizer and granulating low tower thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2006507C3 (en) * | 1970-02-13 | 1979-02-08 | Uhde Gmbh, 4600 Dortmund | Method and device for prilling melts |
| JPH0274583A (en) * | 1988-09-09 | 1990-03-14 | Asahi Chem Ind Co Ltd | Production of granular calcium nitrate fertilizer and apparatus therefor |
| MXPA05005177A (en) * | 2002-11-14 | 2005-07-22 | Shell Int Research | A process for the manufacture of sulphur-containing ammonium phosphate fertilizers. |
| CN201092565Y (en) * | 2007-08-02 | 2008-07-30 | 福建永春县哈迪利复合肥有限责任公司 | Equipment for preparing granular composite fertilizer |
| CN101555181B (en) * | 2009-05-13 | 2012-06-27 | 魏贵生 | Novel tower-type air-cooled prilling device for full-melting compound fertilizers |
| CN201883044U (en) * | 2010-11-16 | 2011-06-29 | 常州市苏风机械厂 | Tower type cooling, crystallizing and prilling device |
| CN205127885U (en) * | 2015-11-04 | 2016-04-06 | 天脊煤化工集团股份有限公司 | Pelleting system |
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