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WO2016120317A1 - Procédé de conditionnement d'engrais en granulés - Google Patents

Procédé de conditionnement d'engrais en granulés Download PDF

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Publication number
WO2016120317A1
WO2016120317A1 PCT/EP2016/051686 EP2016051686W WO2016120317A1 WO 2016120317 A1 WO2016120317 A1 WO 2016120317A1 EP 2016051686 W EP2016051686 W EP 2016051686W WO 2016120317 A1 WO2016120317 A1 WO 2016120317A1
Authority
WO
WIPO (PCT)
Prior art keywords
granules
moistened
air
fertilizer
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2016/051686
Other languages
German (de)
English (en)
Inventor
Harald Günter
Fabian Horbert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Koeppern GmbH and Co KG
Original Assignee
Maschinenfabrik Koeppern GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102015101199.9A external-priority patent/DE102015101199A1/de
Priority claimed from DE102015115468.4A external-priority patent/DE102015115468A1/de
Application filed by Maschinenfabrik Koeppern GmbH and Co KG filed Critical Maschinenfabrik Koeppern GmbH and Co KG
Priority to CA2975179A priority Critical patent/CA2975179A1/fr
Priority to RU2017129806A priority patent/RU2674974C1/ru
Priority to EP16704139.1A priority patent/EP3250314A1/fr
Priority to BR112017015339A priority patent/BR112017015339A2/pt
Publication of WO2016120317A1 publication Critical patent/WO2016120317A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/30—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using agents to prevent the granules sticking together; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
    • C01D5/004—Preparation in the form of granules, pieces or other shaped products
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D1/00—Fertilisers containing potassium
    • C05D1/005—Fertilisers containing potassium post-treatment
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D1/00—Fertilisers containing potassium
    • C05D1/02—Manufacture from potassium chloride or sulfate or double or mixed salts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/22—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by pressing in moulds or between rollers

Definitions

  • fertilizer granulate means in particular potassium fertilizer granules and more preferably potassium chloride fertilizer granules or potassium sulfate fertilizer granules.
  • the invention also includes the conditioning of other fertilizer granules, eg. B. ammonium sulfate granules.
  • Fertilizer granules for example potassium sulfate fertilizer granules or potassium chloride fertilizer granules
  • the starting material eg fine-grained salts
  • the starting material eg fine-grained salts
  • scabs so-called scabs.
  • These flat slugs are then crushed (eg in impact mills) and classified.
  • the starting material eg potassium chloride salts
  • the starting material eg potassium chloride salts
  • Drying and cooling in the fluidized bed can be done (see DD 136 956).
  • the starting materials are not pressed dry in practice, but the finely crystalline potassium sulfate is usually compressed with the addition of water in the roller press to the rag.
  • the slug can be dried by a first process variant in a dryer and then granulated. A conditioning of the granules is not provided. The granules have in this case a low final moisture, but also the abrasion resistance is low.
  • drying of the slug prior to granulation is dispensed with, so that the moist slug is granulated. To increase the quality of the raw granules, this can be moistened after granulation by adding water.
  • the moistened granules are then stored in large product storage for several weeks, so that the surface of the granules loosened by the addition of water recrystallizes and solidifies. In this way one obtains an end product with higher humidity but also higher abrasion resistance.
  • Roll press is treated at elevated temperatures with water or steam. This should be in the material to be pressed a moisture content of 0.5 to 2.0 wt .-% and a temperature of 40 ° C to 50 ° C are set. The temperature of the material to be compacted should be kept below the condensation temperature of water vapor during the entire pressing process.
  • the product withdrawn from the high-pressure roller press preferably at a temperature of 55 to 95 ° C, consists of slugs, which are then ground. From the ground product is then the good grain, preferably separated with a mean grain diameter of 1 mm to 4 mm from the coarse and fine grain as a product and cooled to room temperature.
  • DE 39 18 523 A1 describes a method for preventing dust formation when loading or transporting granules or pellets, in particular fertilizer granules, such granules being produced by dry press granulation.
  • the formation of dust during loading or transport is prevented by the use of a conditioning agent, wherein a liquid mixture (dust-binding mixture) of at least two organic substances is added, which are fully soluble with each other.
  • the invention has for its object to provide a method by which fertilizer granules and in particular potassium fertilizer granules, particularly preferably potassium chloride fertilizer granules or potassium sulfate fertilizer granules with low investment outlay and can be economically conditioned so that a storable product with low Unterkorn- or Fine dust formation and high abrasion resistance is provided.
  • the invention according to a first aspect teaches a method for conditioning fertilizer granules, eg. B. Potassium chloride fertilizer granules, initially granules having a temperature of more than 40 ° C is provided, wherein the granules are moistened with water and wherein then the moistened granules are subjected to an air flow and thereby solidified by utilizing the intrinsic heat of the granules.
  • fertilizer granules eg. B. Potassium chloride fertilizer granules
  • initially granules having a temperature of more than 40 ° C is provided, wherein the granules are moistened with water and wherein then the moistened granules are subjected to an air flow and thereby solidified by utilizing the intrinsic heat of the granules.
  • the moistened granules (for solidification) with an air volume of at least 100 m 3 (cubic meters) per ton of granules (ie specific air volume of 100 m 3 / t) is dehydrated at an air temperature of less than 45 ° C.
  • the specification of the mass refers to the moistened granules charged with the air.
  • the invention is based on the recognition that it is quite advantageous to moisten the (raw) granules and to apply a self-heating with an air flow, so that solidification and possibly smoothing of the surface takes place and thus the abrasion and the undesired formation of undersize or fine dust is reduced.
  • the invention has recognized that it is not necessary to dry the moistened granules (with hot air) and then to cool (with cooling air), but that a product with excellent shelf life and quality can be obtained if (only) a disintegration takes place with very high air flows. While z. B.
  • first drying with hot air and then cooling with air at room temperature can be dispensed with hot air drying in the invention, when the (cooling) air at room temperature with very high air flow of at least 100 m 3 , preferably at least 300 m 3 , z. B.
  • the air used for Entwrasung has relatively low temperatures in the range of room temperature, so that in particular can be dispensed with consuming burner or burner stages for heating the air. Only if such a system is operated in extremely cold environment and consequently air with very low temperatures (eg near the freezing point or below) has to be drawn, can a slight preheating of the air be expedient in the context of the invention without however, temperatures of 45 ° C are exceeded. Overall, the system works accordingly energetically and technically very favorable.
  • the air for Entwrasung in the invention has a maximum temperature of up to 35 ° C. The amount of air can be selected depending on the air temperature and the relative humidity (of the air supplied).
  • the moistened granules will preferably be deve- loped in a fluidized bed system.
  • the Entwrasung can also be done in other types of equipment.
  • the invention proposes that the moistened granulate be conveyed in a dewatering zone of the fluidized-bed installation.
  • the moistening can be carried out in a basically known manner in a drum or in a drum mixer. Such a mixture in the drum should at the same time provide for a rounding of the particles.
  • the invention has recognized in a preferred development that a humidification in a drum is not mandatory, but that z. As well as the humidification in a wave mixer, z. B. a 2-wave mixer can be done. In this way, the investment costs can be further reduced.
  • the invention also relates to a device for conditioning fertilizer granules with a method of the type described.
  • a device comprises a mixing device for moistening the (raw) granules and a Entwrasungsvorraum in which the moistened granules with an air flow of at least 100 m 3 per ton of granules is dehydrated at an air temperature of less than 45 ° C.
  • the Entwrasungsvortechnisch is particularly preferably formed as a fluidized bed plant, the Entwrasung thus takes place in the fluidized bed.
  • the invention teaches a method of conditioning fertilizer granules, eg, potassium sulfate fertilizer granules,
  • Moist granules which are produced from the rug, in the context of the invention preferably means a granulate having a moisture content of 0.5% by weight to 2.0% by weight. According to the invention, this already moist granulate is moistened (once again) with the addition of water, preferably with the addition of 0.5% by weight to 5.0% by weight, particularly preferably 1% by weight to 3% by weight.
  • the invention is based in this second aspect, first of the recognition that in the course of the production of fertilizer granules, such as potassium sulfate fertilizer granules is not (always) necessary to dry the scab before granulation, so that dispensed according to the invention costly drying equipment can.
  • the granules produced by the press granulation is therefore available in a moist state.
  • the moistened granules are preferably devoured in the air quantity of at least 100 m 3 , preferably at least 300 m 3 , for example at least 600 m 3 per ton of granules.
  • the conditioning of the granules according to the invention results in the abrasion resistance being improved by 30% to 50% compared with conventional processes in which the (moistened) granulate is stored in large product storage units over several weeks , In addition, the possibly still necessary storage times to reach a salable moisture content of ⁇
  • 0.5 wt .-% greatly reduce and, accordingly, also reduce required storage capacity.
  • the subject of the invention is not only the conditioning method described, but also a method of producing fertilizer granules, e.g. Potassium fertilizer granules, most preferably potassium sulfate fertilizer granules.
  • fertilizer granules e.g. Potassium fertilizer granules, most preferably potassium sulfate fertilizer granules.
  • starting material e.g. fine-grained potassium salt, with addition of e.g.
  • the slug is comminuted (i.e., granulated) to form granules and optionally classified.
  • the granules are then conditioned in the manner described, that is, the granules are moistened with water and the moistened granules are then subjected to an air flow and solidified.
  • the starting material is not heated prior to compaction so that it preferably has temperatures below 40 ° C.
  • press granulation ie compaction on the one hand and granulation on the other hand, there is likewise no (active) heating of the material, but at best (passive) heating by the pressing process and / or the granulation process takes place.
  • the starting material is preferably added with the addition of water in an amount of 0.5 wt .-% to 2 wt .-%, for example 0.5
  • the flake resulting from the compaction is particularly preferably comminuted in the moist state without prior drying, so that moist granules are made available, which is then moistened (additionally) in the manner described in the context of conditioning.
  • the invention also encompasses production processes in which the slug is optionally dried before granulation.
  • the (conditioned) granules are stored in a storage, e.g. a warehouse, stored in air for a predetermined period of time.
  • a storage e.g. a warehouse
  • this period can be significantly reduced compared to the known methods, so that the storage capacities as a whole are reduced.
  • the starting material is preferably moistened on the roller press just prior to application, e.g. in a mixer, e.g. a drum mixer or a two-shaft mixer.
  • a mixer e.g. a drum mixer or a two-shaft mixer.
  • a mixer e.g. Drum mixer used for the moistening of the granulate produced by the press granulation.
  • a mixer e.g. Drum mixer used.
  • Such a mixture in the drum can at the same time round off the particles.
  • the invention has recognized in a preferred development that moistening in a drum is not absolutely necessary, but that, for example, also moistening in a wave mixer, e.g. a two-shaft mixer can be done. In this way, the investment costs can be further reduced.
  • the water content of the granules is particularly preferably reduced to less than 1%, preferably less than 0.5%, for example less than 0.2%, by applying the air stream to the air stream.
  • the value can then be achieved by relatively short storage times.
  • a plant for producing fertilizer granules of the type described has at least one (high-pressure) roller press (compacting press) and a comminution device downstream of the roller press (for example, impact mill).
  • a moistening device e.g. a mixer can be arranged before the roll press.
  • a mixing device for moistening the granulate is then preferably also provided, e.g. a wave mixer (e.g., two wave mixers).
  • a device with which the moistened granules can be acted upon by an air flow e.g. a Entwrasungsvoriques, which is preferably designed as a fluidized bed system, i. the Entwrasung takes place in the fluidized bed, and more preferably without upstream hot air drying zone.
  • Fig. 1 shows a device for conditioning of fertilizer granules, in particular of potassium chloride fertilizer granules in a highly simplified schematic representation, in particular according to the first aspect of the invention and
  • Fig. 2 shows a device for the production and conditioning of
  • Fertilizer granules in particular of potassium sulfate fertilizer granules, in particular according to the second aspect of the invention.
  • Figure 1 shows an apparatus for conditioning of fertilizer granules, in particular of potassium chloride fertilizer granules in a highly simplified schematic representation.
  • Fig. 1 relates in particular to the first aspect of the invention.
  • the device according to the invention has a mixing device 1 and a disintegrating device 2 connected downstream of the mixing device 1, which in the illustrated embodiment is designed as a fluidized bed system 2.
  • Granules are initially made available in the process according to the invention, specifically from a granulation unit 4 that is merely indicated. These are usually one (or more) roller presses or roller press with downstream painting unit. and screening level. The starting material, for. B. dried fine salt is compacted in this roller press and thereby pressed into so-called scabs. These slugs are then crushed or ground and classified so that the granules or raw granules are made available for the subsequent conditioning.
  • the raw granules generally have relatively high temperatures of more than 40 ° C. after pressing granulation. This residual heat is utilized in the context of the subsequent conditioning. This conditioning is shown in the figure.
  • the (warm) raw granulate G is moistened in the mixing device 1.
  • This humidifying mixer 1 is formed in the embodiment as a two-shaft mixer. This is followed by the Entwrasungsvoriques 2 and consequently the fluidized bed plant.
  • the moistened granulate B is dewatered and solidified with an air quantity of at least 100 m 3 per ton of granules at an air temperature of less than 45 ° C.
  • the supplied air L thus has a temperature in the range of room temperature.
  • the fluidized bed system 2 which is used in the context of the invention, can therefore be shortened / reduced compared to conventional fluidized-bed systems, which on the one hand have a drying zone and, on the other hand, a cooling zone, so that the outlay on equipment is reduced. It can also be dispensed with corresponding hot gas generator for heating drying air.
  • FIG. 2 shows, in a greatly simplified manner, an apparatus for producing (and conditioning) fertilizer granules, in particular potassium sulfate fertilizer granules.
  • Fig. 2 relates in particular to the second aspect of the invention.
  • An essential component of such a plant is a roller press 5, in which the starting material (for example potassium sulfate salt) is compressed and thus compacted.
  • the raw material supplied to the roller press A is previously moistened with water, in a mixing device 6, which is the roller press 5 upstream.
  • the moist slug S emerging from the roller press 5 is comminuted in a granulating device 7, which can be designed as an impact mill, for example, and consequently granulated. It is particularly preferably provided to crush the scoop S in a moist state without prior drying. This is usually followed by a classification, not shown.
  • the (moist) granules G produced in this way are then conditioned according to the invention - optionally after storage or intermediate storage.
  • the granules G is moistened in a mixing device 1 with water to dissolve the granule surface.
  • the moistened granulate B is fed to a device 2, which in the exemplary embodiment is designed as a fluidized bed system, and in which the moistened granulate B is acted upon by an air flow L and thereby dehydrated and solidified. On drying with hot air is omitted, so that then no cooling is required.
  • the fluidized-bed plant 5 which is used in the context of the invention, can consequently be shortened / reduced in size compared to conventional fluidized-bed plants, which on the one hand have a drying zone and, on the other hand, a cooling zone, so that the outlay on equipment is reduced. It can also be dispensed with corresponding hot gas generator for heating drying air.
  • the granules conditioned in this way have a very low moisture content as product P, so that it is immediately salable. If the humidity does not meet the requirements, it is possible to remove the granules from the fluidized bed plant 2 in a memory, for. B. a warehouse to store in air, so that after a relatively short period a salable product is available.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Fertilizers (AREA)

Abstract

L'invention concerne un procédé de conditionnement d'engrais en granulés, par exemple d'engrais en granulés contenant du chlorure de potassium ou du sulfate de potassium ; on produit tout d'abord les granulés qui sont mouillés par exemple avec de l'eau puis on soumet les granulés mouillés à un flux d'air de façon à les compacter, et ce éventuellement par utilisation de la chaleur propre des granulés. De préférence, les granulés mouillés sont déshydratés avec une quantité d'air d'au moins 100 m3 par tonne de granulés à une température d'air inférieure à 45 °C.
PCT/EP2016/051686 2015-01-28 2016-01-27 Procédé de conditionnement d'engrais en granulés Ceased WO2016120317A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA2975179A CA2975179A1 (fr) 2015-01-28 2016-01-27 Procede de conditionnement d'engrais en granules
RU2017129806A RU2674974C1 (ru) 2015-01-28 2016-01-27 Способ кондиционирования гранулированного удобрения (варианты). способ изготовления гранулированного удобрения. устройство для кондиционирования гранулированного удобрения
EP16704139.1A EP3250314A1 (fr) 2015-01-28 2016-01-27 Procédé de conditionnement d'engrais en granulés
BR112017015339A BR112017015339A2 (pt) 2015-01-28 2016-01-27 ?processo para o condicionamento de granulado de material fertilizante?

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102015101199.9 2015-01-28
DE102015101199.9A DE102015101199A1 (de) 2015-01-28 2015-01-28 Verfahren zur Konditionierung von Düngemittelgranulat
DE102015115468.4 2015-09-14
DE102015115468.4A DE102015115468A1 (de) 2015-09-14 2015-09-14 Verfahren zur Konditionierung von Düngemittelgranulat

Publications (1)

Publication Number Publication Date
WO2016120317A1 true WO2016120317A1 (fr) 2016-08-04

Family

ID=55353173

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/051686 Ceased WO2016120317A1 (fr) 2015-01-28 2016-01-27 Procédé de conditionnement d'engrais en granulés

Country Status (5)

Country Link
EP (1) EP3250314A1 (fr)
BR (1) BR112017015339A2 (fr)
CA (1) CA2975179A1 (fr)
RU (1) RU2674974C1 (fr)
WO (1) WO2016120317A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108715558A (zh) * 2018-06-07 2018-10-30 国投新疆罗布泊钾盐有限责任公司 一种硫酸钾球型造粒的方法
WO2019034195A1 (fr) * 2017-08-16 2019-02-21 K+S Aktiengesellschaft Procédé de réduction de la tendance à l'agglomération du chlorure de potassium
CN120113774A (zh) * 2025-05-08 2025-06-10 四川味滋美食品科技有限公司 一种底料加工控制方法和设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD136956A1 (de) 1978-06-01 1979-08-08 Wolfgang Tittel Verfahren zur herstellung von nichtstaubenden abriebfesten kaliduengemittelgranulaten
DE2810640A1 (de) 1978-03-11 1979-09-13 Kali & Salz Ag Verfahren zur herstellung von gekoernten produkten
DE3918523A1 (de) 1989-06-07 1990-12-13 Kali & Salz Ag Verfahren zur staubbindung in duenger-granulaten
EP0488199A1 (fr) * 1990-11-27 1992-06-03 ENICHEM AGRICOLTURA S.p.A. Procédé pour granuler des sels de potassium
DE10252848B3 (de) * 2002-11-13 2004-03-25 Kali-Umwelttechnik Sondershausen Gmbh Abriebfestes, tropentaugliches Kalidüngemittelgranulat, Verfahren zu dessen Herstellung sowie Vorrichtung zum Durchführen des Verfahrens

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU986478A1 (ru) * 1980-08-11 1983-01-07 Пермский политехнический институт Способ получени гранулированных минеральных удобрений

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2810640A1 (de) 1978-03-11 1979-09-13 Kali & Salz Ag Verfahren zur herstellung von gekoernten produkten
DD136956A1 (de) 1978-06-01 1979-08-08 Wolfgang Tittel Verfahren zur herstellung von nichtstaubenden abriebfesten kaliduengemittelgranulaten
DE3918523A1 (de) 1989-06-07 1990-12-13 Kali & Salz Ag Verfahren zur staubbindung in duenger-granulaten
EP0488199A1 (fr) * 1990-11-27 1992-06-03 ENICHEM AGRICOLTURA S.p.A. Procédé pour granuler des sels de potassium
DE10252848B3 (de) * 2002-11-13 2004-03-25 Kali-Umwelttechnik Sondershausen Gmbh Abriebfestes, tropentaugliches Kalidüngemittelgranulat, Verfahren zu dessen Herstellung sowie Vorrichtung zum Durchführen des Verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019034195A1 (fr) * 2017-08-16 2019-02-21 K+S Aktiengesellschaft Procédé de réduction de la tendance à l'agglomération du chlorure de potassium
CN108715558A (zh) * 2018-06-07 2018-10-30 国投新疆罗布泊钾盐有限责任公司 一种硫酸钾球型造粒的方法
CN120113774A (zh) * 2025-05-08 2025-06-10 四川味滋美食品科技有限公司 一种底料加工控制方法和设备

Also Published As

Publication number Publication date
EP3250314A1 (fr) 2017-12-06
CA2975179A1 (fr) 2016-08-04
RU2674974C1 (ru) 2018-12-13
BR112017015339A2 (pt) 2018-01-09

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