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WO1995001833A1 - Process for producing granulates from molten products - Google Patents

Process for producing granulates from molten products Download PDF

Info

Publication number
WO1995001833A1
WO1995001833A1 PCT/EP1994/002093 EP9402093W WO9501833A1 WO 1995001833 A1 WO1995001833 A1 WO 1995001833A1 EP 9402093 W EP9402093 W EP 9402093W WO 9501833 A1 WO9501833 A1 WO 9501833A1
Authority
WO
WIPO (PCT)
Prior art keywords
products
bulk body
sulfur
fixed bed
piece
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/EP1994/002093
Other languages
German (de)
French (fr)
Inventor
Axel König
Herbert WÜRMSEHER
Matthias Kleinhans
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.)
Santrade Ltd
Original Assignee
Santrade Ltd
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
Application filed by Santrade Ltd filed Critical Santrade Ltd
Priority to AU71248/94A priority Critical patent/AU7124894A/en
Priority to JP7503798A priority patent/JPH08504129A/en
Priority to EP94920468A priority patent/EP0658129A1/en
Priority to KR1019950700588A priority patent/KR950702865A/en
Publication of WO1995001833A1 publication Critical patent/WO1995001833A1/en
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
    • B01J2/26—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic on endless conveyor belts
    • 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
    • B01J2/20—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/0237—Converting into particles, e.g. by granulation, milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • B29B2009/168—Removing undesirable residual components, e.g. solvents, unreacted monomers; Degassing

Definitions

  • the invention relates to a process for the production of granules from molten products which are solidified in a piece-like form, in particular in the form of lozenges and in which the evaporation products occurring during production are suctioned off and a fixed bed bulk body is associated with the suction flow. which is used to crystallize the vaporous product portion.
  • the invention is based on the knowledge that if the process for the production of lump-like substances, for example for the production of sulfur in the form of lozenges, is used, these lozenges produced by the process can also be suitable for the crystallization of the from the To cause exhaust air to remove sulfur vapor.
  • the invention therefore proposes that some of the piece-like, in particular pastille-like products be used to form the fixed bed bulk body. As shown by tests, this configuration allows excellent cleaning of the exhaust air to be achieved. At the same time, the advantage is achieved that a subsequent filtration is saved.
  • the material of the bulk body which when using the method according to the invention only consists of the pure product itself, can in turn be used and sold as a product after use as a bulk body. It should be remembered that the bulk body itself is continuously emptied and refilled with the product, so that there is always an effective crystallization of the sulfur vapor in the region of the bulk body.
  • the invention is shown schematically using an exemplary embodiment.
  • the only drawing shows a plant for the production of sulfur pastilles.
  • sulfur is fed via a line (1) to a feed device (2) which divides the melt into individual drops and deposits it drop-like on a cooling belt (3) made of metal rotating in a clockwise direction.
  • the feed device (2) is encased by a suction hood (4) which has a suction nozzle (5), from which a suction line (6) leads to a suction blower (7).
  • a fixed bed body (8) is used, which serves to allow the still vaporous portion of the sulfur that emerges from the hood (4) to crystallize in order to clean the exhaust air.
  • the pastilles solidified at the right end of the suction hood (4) reach a conveyor (9) and from there into a collecting container (10).
  • a collecting container (10) According to the invention, it is proposed to branch off part of the piece-shaped, pastille-shaped product accumulated in the collecting container (10) and, as shown schematically with the dashed line (11), indicates, and to use as material for the formation of the bulk body (8).
  • the sulfur pastilles introduced into the bulk body (8) are ideally suited for the sulfur vapor to crystallize out on you.
  • the sulfur pastilles present in the bulk body (8) can be removed continuously or discontinuously in the direction of the arrow (12) and replaced by new pastilles which come on the feed path (11).
  • the pastils removed in the sense of arrow (12), which consist of pure sulfur, can then also be packaged and sold as a product.
  • the vaporous portion of the sulfur that occurs in this process can therefore largely be collected and reused before it is released into the exhaust air.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Gas Separation By Absorption (AREA)
  • Glanulating (AREA)

Abstract

When granulates are produced from molten materials, vapours result which must be removed from the outgoing air. The single pieces produced, in particular tablets, are directly used to form a fixed bed bulk body (8) placed into the flow of outgoing air for crystallising the sulphur content of the vapours. The invention is suitable for producing sulphur tablets.

Description

Verfahren zur Herstellung von Granulat aus geschmolzenen Produkten Process for the production of granules from molten products

Die Erfindung betrifft ein Verfahren zur Herstellung von Granu¬ lat aus geschmolzenen Produkten, die in stückartiger Form, ins¬ besondere in Pastillenform zum Erstarren gebracht werden und bei dem eine Absaugung der bei der Herstellung auftretenden Verdampfungsprodukte vorgesehen ist und der Absaugströmung ein Festbettschüttkörper zugeordnet ist, der zur Auskristallisie¬ rung des dampfförmigen Produktanteiles genutzt wird.The invention relates to a process for the production of granules from molten products which are solidified in a piece-like form, in particular in the form of lozenges and in which the evaporation products occurring during production are suctioned off and a fixed bed bulk body is associated with the suction flow. which is used to crystallize the vaporous product portion.

Es ist bekannt, daß z.B. bei der Verarbeitung von Schwefel¬ schmelzen zu pastillenförmigem Granulat aus Gründen des Umwelt¬ schutzes die Prozeßabluft gereinigt werden muß. Man tut dies indem in die Absaugströmung Filter oder Festbettschüttkörper aus Materialien eingebracht werden, die Fremdsubstanzen ent¬ halten, an denen sich der in der Abluft unerwünschte Schwefel¬ dampf kristallin absetzt. Schwefelstaub wird in der Regel in Filtern aufgefangen, die zur Herstellung von feinkörnigem Material ohnehin meist notwendig werden.It is known that e.g. When processing sulfur melts into pastille-shaped granules, the process exhaust must be cleaned for environmental protection reasons. This is done by introducing filters or fixed-bed bulk solids made of materials into the suction flow, which contain foreign substances on which the sulfur vapor undesirable in the exhaust air settles in crystalline form. Sulfur dust is generally collected in filters, which are usually necessary to produce fine-grained material.

Die Erfindung geht von der Erkenntnis aus, daß dann, wenn das Verfahren zur Herstellung von stückartigen Substanzen, bei¬ spielsweise zur Herstellung von Schwefel in Pastillenform dient, diese mit dem Verfahren hergestellten Pastillen auch geeignet sein können, um die Auskristallisierung des aus der Abluft zu entfernenden Schwefeldampfes zu bewirken. Die Er¬ findung schlägt daher vor, daß ein Teil der stückartigen, ins¬ besondere pastillenartigen Produkte zur Bildung des Festbett¬ schüttkörpers verwendet wird. Durch diese Ausgestaltung kann, wie Versuche gezeigt haben, eine ausgezeichnete Reinigung der Abluft erreicht werden. Gleichzeitig wird der Vorteil erreicht, daß eine anschließende Filtration gespart wird. Das Material des Schüttkörpers schließlich, das bei Verwendung des erfin¬ dungsgemäßen Verfahrens nur aus dem reinen Produkt selbst be¬ steht, kann nach Gebrauch als Schüttkörper wiederum als Produkt verwendet und verkauft werden. Dabei ist daran zu denken, daß der Schüttkörper selbst kontinuierlich jeweils entleert und wieder mit dem Produkt gefüllt wird, so daß stets eine wirksame Auskristallisation des Schwefeldampfes im Bereich des Schütt¬ körpers eintritt.The invention is based on the knowledge that if the process for the production of lump-like substances, for example for the production of sulfur in the form of lozenges, is used, these lozenges produced by the process can also be suitable for the crystallization of the from the To cause exhaust air to remove sulfur vapor. The invention therefore proposes that some of the piece-like, in particular pastille-like products be used to form the fixed bed bulk body. As shown by tests, this configuration allows excellent cleaning of the exhaust air to be achieved. At the same time, the advantage is achieved that a subsequent filtration is saved. Finally, the material of the bulk body, which when using the method according to the invention only consists of the pure product itself, can in turn be used and sold as a product after use as a bulk body. It should be remembered that the bulk body itself is continuously emptied and refilled with the product, so that there is always an effective crystallization of the sulfur vapor in the region of the bulk body.

Die Erfindung ist anhand eines Ausführungsbeispieles schema¬ tisch dargestellt. Die einzige Zeichnung zeigt eine Anlage zur Herstellung von Schwefelpastillen. Schwefel wird zu diesem Zweck über eine Leitung (1) einer Aufgabevorrichtung (2) zuge¬ führt, welche die Schmelze in einzelne Tropfen aufteilt und tropfenförmig auf einem im Uhrzeigersinn umlaufenden Kühlband (3) aus Metall ablegt. Die Aufgabevorrichtung (2) ist von einer Absaughaube (4) ummantelt, die einen Absaugstutzen (5) auf¬ weist, von dem aus eine Absaugleitung (6) zu einem Absaug- gebläse (7) führt. In die Leitung (6) ist ein Festbettschütt¬ körper (8) eingesetzt, der dazu dient, den noch dampfförmigen Anteil des Schwefels, der aus der Haube (4) austritt, aus¬ kristallisieren zu lassen, um die Abluft zu reinigen.The invention is shown schematically using an exemplary embodiment. The only drawing shows a plant for the production of sulfur pastilles. For this purpose, sulfur is fed via a line (1) to a feed device (2) which divides the melt into individual drops and deposits it drop-like on a cooling belt (3) made of metal rotating in a clockwise direction. The feed device (2) is encased by a suction hood (4) which has a suction nozzle (5), from which a suction line (6) leads to a suction blower (7). In the line (6) a fixed bed body (8) is used, which serves to allow the still vaporous portion of the sulfur that emerges from the hood (4) to crystallize in order to clean the exhaust air.

Von dem Kühlband (3) aus gelangen die am rechten Ende der Ab¬ saughaube (4) erstarrten Pastillen auf einen Förderer (9) und von diesem in einen Sammelbehälter (10) . Erfindungsgemäß wird vorgeschlagen, einen Teil des im Sammelbehälter (10) angehäuf¬ ten stückförmigen, hier pastillenfδrmigen, Produktes abzuzwei¬ gen und, wie mit der gestrichelten Linie (11) εchematisch ange- deutet ist, und als Material zur Bildung des Schüttkörpers (8) zu verwenden. Die in den Schüttkörper (8) eingebrachten Schwefelpastillen eignen sich hervorragend dazu, daß Schwefeldampf an Ihnen auskristallisiert wird. Die im Schütt¬ körper (8) vorhandenen Schwefelpastillen können kontinuierlich oder diskontinuierlich im Sinn des Pfeiles (12) entnommen und durch neue Pastillen, die auf dem Zuführweg (11) kommen, er¬ setzt werden. Die im Sinn des Pfeiles (12) entnommenen Pastil¬ len, die aus reinem Schwefel bestehen, lassen sich anschließend ebenfalls als Produkt verpacken und verkaufen. Der dampfförmige Anteil des Schwefels, der bei diesem Verfahren auftritt, kann daher zum größten Teil aufgefangen und wiederverwendet werden, ehe er in die Abluft gelangt. From the cooling belt (3), the pastilles solidified at the right end of the suction hood (4) reach a conveyor (9) and from there into a collecting container (10). According to the invention, it is proposed to branch off part of the piece-shaped, pastille-shaped product accumulated in the collecting container (10) and, as shown schematically with the dashed line (11), indicates, and to use as material for the formation of the bulk body (8). The sulfur pastilles introduced into the bulk body (8) are ideally suited for the sulfur vapor to crystallize out on you. The sulfur pastilles present in the bulk body (8) can be removed continuously or discontinuously in the direction of the arrow (12) and replaced by new pastilles which come on the feed path (11). The pastils removed in the sense of arrow (12), which consist of pure sulfur, can then also be packaged and sold as a product. The vaporous portion of the sulfur that occurs in this process can therefore largely be collected and reused before it is released into the exhaust air.

Claims

Patentansprüche claims 1. Verfahren zur Herstellung von Granulat aus geschmol¬ zenen Produkten, die in stückartiger Form, inbesondere in Pastillenform, zum Erstarren gebracht werden und bei dem eine Absaugung der bei der Herstellung auftretenden Verdampfungspro¬ dukte vorgesehen ist und der Absaugεtrömung ein Festbettschütt¬ körper zugeordnet ist, der zur Auskristallisierung des dampf¬ förmigen Produktanteiles genutzt wird, dadurch gekennzeichnet, daß ein Teil der stückartigen, insbesondere pastillenartigen Produkte zur Bildung des Festbettschüttkörpers (8) verwendet wird.1. Process for the production of granules from melted products, which are solidified in piece-like form, in particular in the form of lozenges, and in which the evaporation products occurring during production are suctioned off and the suction flow is associated with a fixed bed bulk body , which is used for the crystallization of the vaporous product portion, characterized in that part of the piece-like, in particular pastille-like products is used to form the fixed bed bulk body (8). 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auch die εtückartigen Produkte des Festbettschüttkörpers (8) als Endprodukt verwendet werden. 2. The method according to claim 1, characterized in that the piece-like products of the fixed bed body (8) are used as the end product.
PCT/EP1994/002093 1993-07-07 1994-06-28 Process for producing granulates from molten products Ceased WO1995001833A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU71248/94A AU7124894A (en) 1993-07-07 1994-06-28 Process for producing granulates from molten products
JP7503798A JPH08504129A (en) 1993-07-07 1994-06-28 Method for producing granules from melted products
EP94920468A EP0658129A1 (en) 1993-07-07 1994-06-28 Process for producing granulates from molten products
KR1019950700588A KR950702865A (en) 1993-07-07 1994-06-28 Process for producing small particles from dissolution product

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4322629.9 1993-07-07
DE4322629A DE4322629C1 (en) 1993-07-07 1993-07-07 Process for producing granules (pellets) from molten products

Publications (1)

Publication Number Publication Date
WO1995001833A1 true WO1995001833A1 (en) 1995-01-19

Family

ID=6492185

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/002093 Ceased WO1995001833A1 (en) 1993-07-07 1994-06-28 Process for producing granulates from molten products

Country Status (9)

Country Link
EP (1) EP0658129A1 (en)
JP (1) JPH08504129A (en)
KR (1) KR950702865A (en)
CN (1) CN1111901A (en)
AU (1) AU7124894A (en)
CA (1) CA2142832A1 (en)
DE (1) DE4322629C1 (en)
RU (1) RU95108248A (en)
WO (1) WO1995001833A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007061408A1 (en) 2007-12-11 2009-06-18 Sandvik Materials Technology Deutschland Gmbh Method and drop former for producing pastilles and method for producing a sulfur-containing fertilizer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1301606A (en) * 1961-09-22 1962-08-17 United States Steel Corp Improved method and apparatus for agglomeration or sintering
US4705467A (en) * 1984-11-28 1987-11-10 Shell Oil Company Method and apparatus for filtering the air outlet of a solid sulphur particle production apparatus
EP0492149A2 (en) * 1990-12-22 1992-07-01 Santrade Ltd. Process and apparatus for cleaning chemical substances

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1301606A (en) * 1961-09-22 1962-08-17 United States Steel Corp Improved method and apparatus for agglomeration or sintering
US4705467A (en) * 1984-11-28 1987-11-10 Shell Oil Company Method and apparatus for filtering the air outlet of a solid sulphur particle production apparatus
EP0492149A2 (en) * 1990-12-22 1992-07-01 Santrade Ltd. Process and apparatus for cleaning chemical substances

Also Published As

Publication number Publication date
JPH08504129A (en) 1996-05-07
CN1111901A (en) 1995-11-15
CA2142832A1 (en) 1995-01-19
RU95108248A (en) 1996-12-20
DE4322629C1 (en) 1994-08-18
EP0658129A1 (en) 1995-06-21
KR950702865A (en) 1995-08-23
AU7124894A (en) 1995-02-06

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