WO2009155975A1 - Dispositif pour séparer une matière solide et un gaz et installation de fabrication de ciment - Google Patents

Dispositif pour séparer une matière solide et un gaz et installation de fabrication de ciment Download PDF

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Publication number
WO2009155975A1
WO2009155975A1 PCT/EP2008/058103 EP2008058103W WO2009155975A1 WO 2009155975 A1 WO2009155975 A1 WO 2009155975A1 EP 2008058103 W EP2008058103 W EP 2008058103W WO 2009155975 A1 WO2009155975 A1 WO 2009155975A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
line
helical
solid
spiral
Prior art date
Application number
PCT/EP2008/058103
Other languages
German (de)
English (en)
Inventor
Verena Georg
Detlev Kupper
Luis Lagar Garcia
Andreas Hoppe
Heinz-Werner Thiemeyer
Daniel Klegraf
Thomas Deck
Stefanie Richter
Original Assignee
Polysius Ag
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 Polysius Ag filed Critical Polysius Ag
Priority to PCT/EP2008/058103 priority Critical patent/WO2009155975A1/fr
Publication of WO2009155975A1 publication Critical patent/WO2009155975A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones
    • F27B7/2033—Arrangements of preheating devices for the charge consisting of a single string of cyclones with means for precalcining the raw material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling

Definitions

  • the invention relates to a device for separating a solid and a gas and a plant for cement production.
  • the invention has the object to improve the degree of separation in the deposition chamber.
  • the device according to the invention for separating a solid and a gas consists essentially of a helical and / or spiral line in which a gas-solid suspension is separated into a solids flow and a gas flow by centrifugal forces, and one with the end of the helical and / or spiral-like conduit associated Abscheidehunt to which a solid line for discharging the solids flow and a gas line for discharging the gas stream are connected.
  • the deposition chamber has a curved section which adjoins the helical and / or spiral-like line, this section receiving and continuing the curved course of the helical and / or spiral line and the cross section of this section widens in the flow direction.
  • the solid line and the gas line are at the end of the curved Section connected.
  • the curved portion of the deposition chamber can be formed for example by two curved side walls, a bottom, a ceiling, connected to the helical and / or spiral line end face and an opposite boundary wall.
  • the gas line can then be connected in particular to the boundary wall in the region of the ceiling, while the solid line is provided on the boundary wall in the region of the bottom or at the bottom in the region of the boundary wall.
  • the bottom is expediently formed downward in the flow direction.
  • the device for separating a solid and a gas can be used, for example, in a preheater and / or a calciner of a plant for cement production.
  • a preheater in particular several stages can be provided one above the other.
  • FIG. 7a to 7c show various views of a device for separating a solid and a gas according to a seventh embodiment
  • Fig. 8 is a side view of a preheater
  • Fig. 9 is a three-dimensional of a plant for cement production.
  • the device for separating a solid and a gas shown in FIGS. 1 a to 1 c is, for example, a device for preheating, cooling and / or calcining fine-grained materials during cement production. It consists essentially of a helical and / or spiral line Ib in which centrifugal forces separate a gas-solid suspension into a solids stream 5 and a gas stream 6 and one connected to the end of the helical and / or spiral line standing deposition chamber 2 to which a solid line 3 for discharging the solids flow 5 and a gas line 4 for discharging the gas stream 6 are connected.
  • the helical and / or spiral-like line Ib is part of a gas-solid suspension line 1, which further comprises a riser Ia and a deflection Ic, which connects the riser Ia with the descending helical and / or spiral line Ib. Viewed in the vertical direction, at least the beginning of the helical and / or spiral line Ib is higher than its mouth end at the deposition chamber 2.
  • the radius and / or the slope and / or the cross-sectional shape and / or the cross-sectional size of the helical and / or spiral line Ib changes in the flow direction of the gas-solid suspension.
  • the helical and / or spiral line Ib can be adapted to external conditions. This is particularly advantageous when several stages are interleaved and arranged one above the other.
  • the radius, pitch, cross-sectional shape and / or cross-sectional size can change continuously in the flow direction and / or at least in one section. For example, a radius reduction causes an increase in centrifugal force, while a radius increase corresponds to a decrease in centrifugal force.
  • a radius reduction causes an increase in centrifugal force
  • a radius increase corresponds to a decrease in centrifugal force.
  • the deposition chamber 2 has a curved section 2.1, which adjoins the helical and / or spiral line Ib, this section accommodates the curved course of the helical and / or spiral line Ib and continues and the cross section of this section widens in the flow direction, as can be seen in particular from Fig. Ib.
  • the curved section 2.1 of the deposition chamber 2 consists essentially of two curved side walls 2.1.1, 2.1.2, a bottom 2.1.3, a ceiling 2.1.4, connected to the helical and / or spiral line Ib end 2.1.5 and an opposite boundary wall 2.1.6.
  • the gas line 4 is connected to a transition piece 4.1 on the boundary wall 2.1.6 in the area of the ceiling 2.1.4.
  • the transition piece 4.1 represents a connection from a first, rectangular to a second, round cross-sectional shape.
  • the solid line 3 is connected to the bottom 2.1.3 in the region of the boundary wall 2.1.6.
  • the bottom itself is designed to fall downwards in the flow direction.
  • the second embodiment shown in Figures 2a to 2c differs from the first embodiment substantially only by the connection of the gas line 4 to the curved portion 2.1.
  • the boundary wall 2.1.6 is offset slightly inwards in the region of the connection to the gas line 4 or to the transition piece 4.1.
  • the forming thereby level 2.1.7 in the boundary wall 2.1.6 represents a possibility for the realization of mechanical installations in the deposition chamber 2. By mechanical installations of the solid stream 6 can be spatially separated from the gas stream 5 and a better deposition can be effected.
  • the transition piece 4.1 according to the first two embodiments forms a transition from a rectangular to a round cross-section.
  • the input cross section of the transition piece 4. 1 of the gas line 4 has been reduced to approximately half. In this way, there is a stronger suction effect for the gas flow from the deposition chamber.
  • FIGS. 4a to 4c show a fourth exemplary embodiment in which a bypass line 7 is provided, which branches off in the region of the ceiling 2.1.4 of the curved section 2.1 shortly before the connection of the gas line 4 and after a short distance opens into the gas line 4.
  • a bypass line 7 is provided, which branches off in the region of the ceiling 2.1.4 of the curved section 2.1 shortly before the connection of the gas line 4 and after a short distance opens into the gas line 4.
  • the deposition chamber 2 has, in addition to the curved section 2. 1, a cylindrical section 2. 2, wherein the curved section 2. 1 is connected in the region of the cylindrical wall of this cylindrical section 2.
  • the curved portion 2.1 is preferably connected tangentially to the cylindrical portion 2.2, wherein the bottom of the curved portion preferably opens at an angle to the horizontal of at least 30 ° in the cylindrical portion.
  • a funnel-shaped tapered section 2.3 Connected to the cylindrical section 2.2 below is a funnel-shaped tapered section 2.3, to which the solid line 2 is connected.
  • the gas line 4 opens as a dip tube in the cylindrical section 2.2.
  • the cylindrical section 2.2 is formed by the lower part of the gas line 4.
  • Fig. 5c shows that the two side walls 2.1.1 and 2.1.2 of the curved portion 2.1 are not aligned parallel to each other, but increases the distance between the two side walls in the flow direction. As in all other embodiments, the distance between the ceiling 2.1.4 and the floor 2.1.3 increases in the flow direction anyway. Both measures serve to expand the cross section of the curved section 2.1 in the flow direction, whereby the flow rate is reduced and the deposition of the solid is facilitated.
  • a cylindrical section 2.2 and a funnel-shaped tapering section 2.3 are provided. Furthermore, this funnel-shaped tapered section closes
  • the gas line 4 is in turn connected as a dip tube to the cylindrical section 2.2.
  • the last exemplary embodiment according to FIGS. 7a to 7c is a concept which has arisen from the second exemplary embodiment (FIGS. 2a to 2c), the peculiarity of this embodiment being above all the low overall height.
  • the main difference is mainly that the boundary wall 2.1.6 of the deposition chamber 2 significantly reduced. In this way, the solid line 3 can be connected further up.
  • the helical and / or spiral line Ib extends over an angular range of about 180 ° to 270 °.
  • the angular range can also be chosen to be significantly larger or smaller.
  • the radius and / or the pitch and / or cross-sectional shape and / or changes the cross-sectional size of the helical and / or spiral line Ib in the flow direction of the gas-solid suspension can be chosen to be significantly larger or smaller.
  • the radius of curvature of the curved section 2.1 can change in the flow direction, it being conceivable that the radius of curvature of one or both side surfaces 2.1.1, 2.1.2 changes.
  • the curved section 2.1 takes up the curved course of the helical and / or spiral line Ib and continues it.
  • this does not necessarily mean that the curved section 2.1 must have the same radius of curvature as the helical and / or spiral line Ib.
  • the devices described above are preferably used for carrying out chemical and / or physical reactions between a solid and a gas, in particular for preheating, cooling and / or calcining fine-grained materials, wherein a plurality of stages arranged one above the other can be provided.
  • the gas line of a stage goes into the gas-solid suspension line of the next higher level and the solid line of a stage opens into the gas-solid suspension line of the next lower level.
  • FIG. 8 is, for example, a three-stage preheater for cement raw material.
  • the individual stages are only indicated schematically. They may optionally be formed according to one or more of the previously described embodiments. It is thus particularly conceivable that the individual stages I, II, III are configured differently.
  • a solid to be treated is fed in the uppermost stage III via a solids line 3 '"and as a treated solid 5, for example preheated solid, from the lowest stage I. dissipated. While the solid is thus passed from top to bottom through the three stages, the gas flows through the arrangement in the reverse direction.
  • the bottom-stage gas 6 is, for example, the hot exhaust gas of a furnace or a calciner.
  • the in the third stage via the gas line 4 "discharged gas 6" is supplied, for example, for dedusting a filter or a downstream high efficiency separator.
  • the treated solid 5 passes, for example, into a calciner or an oven for further processing.
  • the three stages can be arranged very compact and intertwined. It can further be provided that the helical and / or spiral-like lines Ib, l 'b, l "b of at least two successive stages are formed alternately left and right rotating.
  • FIG. 9 shows a three-dimensional representation of a plant for the heat treatment of fine-grained material in cement production with a rotary kiln 10, a calciner 20 and a preheater 30.
  • the calciner 20 and / or the preheater 30 can be constructed according to FIGS. 1 to 8 be formed described embodiments.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

L'invention concerne un dispositif pour séparer une matière solide et un gaz, ce dispositif comprenant essentiellement une conduite hélicoïdale et/ou en spirale dans laquelle une suspension gaz/matière solide est séparée par des forces centrifuges en un flux de matière solide et un flux de gaz, ainsi qu'une chambre de séparation qui communique avec l'extrémité de la conduite hélicoïdale et/ou en spirale et à laquelle sont reliées une conduite de matière solide pour évacuer le flux de matière solide et une conduite de gaz pour évacuer le flux de gaz. Ladite chambre de séparation présente une partie courbe adjacente à la conduite hélicoïdale et/ou en spirale, cette partie épousant et prolongeant le profil incurvé de la conduite hélicoïdale et/ou en spirale et présentant une section allant en s'élargissant dans le sens de l'écoulement.
PCT/EP2008/058103 2008-06-25 2008-06-25 Dispositif pour séparer une matière solide et un gaz et installation de fabrication de ciment WO2009155975A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/058103 WO2009155975A1 (fr) 2008-06-25 2008-06-25 Dispositif pour séparer une matière solide et un gaz et installation de fabrication de ciment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/058103 WO2009155975A1 (fr) 2008-06-25 2008-06-25 Dispositif pour séparer une matière solide et un gaz et installation de fabrication de ciment

Publications (1)

Publication Number Publication Date
WO2009155975A1 true WO2009155975A1 (fr) 2009-12-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010050889A1 (de) 2010-11-10 2012-05-10 Thyssenkrupp Polysius Ag Rohrleitung mit einer Freiformfläche
CN102575624A (zh) * 2009-09-14 2012-07-11 沃尔沃拉斯特瓦格纳公司 微粒捕集器和包括微粒捕集器的过滤器装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4318692A (en) * 1981-01-02 1982-03-09 Allis-Chalmers Corporation Helical duct gas/meal separator
US5771844A (en) 1996-04-04 1998-06-30 Foster Wheeler Development Corp. Cyclone separator having increased gas flow capacity

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4318692A (en) * 1981-01-02 1982-03-09 Allis-Chalmers Corporation Helical duct gas/meal separator
US5771844A (en) 1996-04-04 1998-06-30 Foster Wheeler Development Corp. Cyclone separator having increased gas flow capacity

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102575624A (zh) * 2009-09-14 2012-07-11 沃尔沃拉斯特瓦格纳公司 微粒捕集器和包括微粒捕集器的过滤器装置
DE102010050889A1 (de) 2010-11-10 2012-05-10 Thyssenkrupp Polysius Ag Rohrleitung mit einer Freiformfläche

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