EP0962255B1 - Cyclone separator - Google Patents
Cyclone separator Download PDFInfo
- Publication number
- EP0962255B1 EP0962255B1 EP99110035A EP99110035A EP0962255B1 EP 0962255 B1 EP0962255 B1 EP 0962255B1 EP 99110035 A EP99110035 A EP 99110035A EP 99110035 A EP99110035 A EP 99110035A EP 0962255 B1 EP0962255 B1 EP 0962255B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- immersion
- pipe
- cyclone separator
- segments
- cyclone
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
- B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
-
- 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
-
- 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
Definitions
- the invention relates to a cyclone separator, in particular for direct heat transfer from the hot exhaust gases of a rotary kiln Zyklonschwebegas heat exchanger plant for cement clinker production on the cement raw meal, with tangential supply of gas and raw meal, Gutaustrag in the lower cyclone area and with a centrally from above into the cyclone protruding and suspended from the cyclone ceiling, composed of several segments immersion tube for the gas discharge, the immersion tube segments are detachably connected at its upper end by bolts with the insulated by refractory lining gas discharge line.
- the raw meal is thermally treated by preheating, calcining, sintering and cooling, wherein the exhaust gas stream of the sintering stage and the exhaust air stream of the cooling stage separated from the clinker cooler or together in a fueled calcination even outside the sintering furnace for calcination be used of the raw meal.
- the preheating usually consists of several superposed Schwebegas-Wärme (2004)erzyklonen that are successively traversed by cement raw meal in the combined DC / countercurrent to the hot exhaust gas of the calcination or the rotary kiln.
- the precalcined material in the calcining stage becomes the lowest cyclone of the cyclone-floating gas-exchanger system separated from the hot gas and introduced into the rotary kiln.
- the hot gas cyclones of Zyklonschwebegas heat exchanger strand, in particular the lowermost cyclone, with hot gas and hot meal a temperature of z. B. 700 to 950 ° C comes into contact, a high mechanical, chemical and thermal stress and thus a high thermochemical and abrasive wear are exposed. This applies in particular to the immersion tube projecting centrally from above into the cyclone separator.
- the invention is therefore based on the object to provide for cement clinker production plants with Zyklonschwebegas heat exchanger system a cyclone separator with segmented dip tube, in which the detachable dip tube segment attachment is safe and is characterized by a long service life.
- Characteristic of the cyclone separator according to the invention with segmented dip tube in which the dip tube segments are detachably connected at their upper ends by approximately radially arranged bolts with the cyclone ceiling or with the Zyklongasabzugs founded, that the bolts are arranged in distributed around the dip tube circumference spacers, according to outside (ie radially outward) each have at least one window-like opening for access of ambient air as a cooling medium for the dip tube segment attachment.
- the dip tube segments may have at the upper end an outwardly angled protruding in cross-section hook-shaped projection, with which the dip tube segments engage in a web extending from the inside of the spacer sleeves upwards.
- This combined attachment of the dip tube segments by hooking and bolting provides a high degree of security of attachment.
- the assembly is facilitated when the segments are hung first, whereby the weight of the segments is discontinued, and then when the hanging dip tube segments are aligned and screwed.
- the crossing joint area on one side Segments covering the holding plate may be arranged with four transverse bolts which are inserted through four corresponding holes in the four adjacent corners of the dip tube segments, then being fastened to the inserted through four transverse bolts crossbar to secure the retaining plate.
- FIG. 1 shows a detail of a cyclone separator of the cyclone ceiling 10, which is internally provided with a refractory lining 11.
- Tangentially hot gas and cement raw meal from a plant for the production of cement clinker flow into the cyclone.
- a dip tube which is composed of a plurality of segments and suspended from the cyclone ceiling 10.
- two side by side arranged immersion tube segments 12 and 13 can be seen in Figure 2, below which in turn the other dip tube segments 14 and 15, etc. are attached.
- From the cyclone ceiling 10 is centrally upwards from the inside equipped with a refractory lining 16 gas discharge line 17 from.
- the dip tube segments 12, 13, etc. of the uppermost row distributed around the dip tube circumference have an outwardly angled projecting projection 18, with which the dip tube segments engage in a web 19 which extends from the inside of spacer sleeves 20 upwards.
- the spacers 20 are distributed around the Tauchrohrone distributed on the cyclone ceiling 10, at the Gas line 17 is fixed and arranged approximately radially to the dip tube center. In the spacer bushings 20, an approximately radially arranged bolt 21 is arranged in each case, with which the dip tube segment 12 is to be detachably connected to the insulated gas discharge line 17.
- the dip tube segments 12, etc. are first hung by means of their hook-shaped projections 18 in the spacers 20 and their webs 19, whereby the weight of the segments is discontinued. Then the segments are aligned and screwed.
- the bolts 21 each have at least one outwardly window-like opening 22 for access of ambient air as a cooling medium for the dip tube segment attachment.
- the bolts 21 can derive the high temperatures acting from the immersion tube inside out well to the outside to the ambient air.
- the lid 23 may still be secured by a tack weld on the dip tube segment 12 after its installation.
- the Tauchrohrsegmentbefest Trent invention is characterized by a long service life.
- the bolts 21 have a thickened head 24 which is inserted into a recess of a cap 25, by means of which the dip tube segment 12 to the inside the spacer sleeves 20 and at the inner web 19 can be tensioned.
- the bolts 21 have at the radially outer end of nuts 26, by means of which they are supported by disc springs 27 and a pulley 28 on the outer circumference of the spacer bushes 20.
- a holding plate 29 covering the crossing joint area on one side of the segments can be arranged with four transverse bolts 30, 31, 32, 33, which are inserted through four corresponding holes in the four adjacent corners of the dip tube segments, wherein on the inserted through four transverse bolts crossbars 34, 35 are secured to secure the retaining plate 29.
- the crossbars 34, 35 may be arranged vertically as drawn, but also horizontally or diagonally.
- the outer contour of the retaining plate 29 may be square, square, round, etc., and they may centrally have a recess 36, z. B. a round hole, which contributes to the weight savings in the holding plate 29.
- the bottom row of dip tube segments is conveniently stabilized below only with cross bars 37.
Abstract
Description
Die Erfindung betrifft einen Zyklonabscheider, insbesondere für die direkte Wärmeübertragung von den heißen Abgasen einer Drehrohrofen-Zyklonschwebegas-Wärmetauscher-Anlage zur Zementklinkerherstellung auf das Zementrohmehl, mit tangentialer Zuführung von Gas und Rohmehl, Gutaustrag im unteren Zyklonbereich und mit einem zentral von oben in den Zyklonabscheider hineinragenden und an der Zyklondecke aufgehängten, aus mehreren Segmenten zusammengesetzten Tauchrohr für die Gasabführung, wobei die Tauchrohrsegmente an ihrem oberen Ende durch Schraubenbolzen mit der durch Feuerfestauskleidung isolierten Gasabzugsleitung lösbar verbunden sind.The invention relates to a cyclone separator, in particular for direct heat transfer from the hot exhaust gases of a rotary kiln Zyklonschwebegas heat exchanger plant for cement clinker production on the cement raw meal, with tangential supply of gas and raw meal, Gutaustrag in the lower cyclone area and with a centrally from above into the cyclone protruding and suspended from the cyclone ceiling, composed of several segments immersion tube for the gas discharge, the immersion tube segments are detachably connected at its upper end by bolts with the insulated by refractory lining gas discharge line.
Bei Anlagen zur Herstellung von Zementklinker aus Zementrohmehl wird das Rohmehl durch Vorwärmen, Calcinieren, Sintern und Kühlen thermisch behandelt, wobei der Abgasstrom der Sinterstufe und der Abluftstrom der Kühlstufe aus dem Klinkerkühler getrennt oder gemeinsam in einer mit Brennstoff versorgten Calcinierstufe noch außerhalb des Sinterofens zur Calcination des Rohmehls genutzt werden. Die Vorwärmstufe besteht in der Regel aus mehreren übereinander angeordneten Schwebegas-Wärmetauscherzyklonen, die nacheinander vom Zementrohmehl im kombinierten Gleich-/Gegenstrom zum heißen Abgas der Calcinierstufe bzw. des Drehrohrofens durchwandert werden. Dabei wird das in der Calcinierstufe vorcalcinierte Gutmaterial im untersten Zyklon des Zyklonschwebegas-Wärmetauschersystems vom Heißgas abgetrennt und in den Drehrohrofen eingeführt. Es versteht sich, daß die Heißgaszyklone des Zyklonschwebegas-Wärmetauscherstranges, insbesondere der unterste Zyklon, der mit Heißgas und Heißmehl einer Temperatur von z. B. 700 bis 950°C in Berührung kommt, einer hohen mechanischen, chemischen und thermischen Beanspruchung und damit einem hohen thermochemischen und abrasiven Verschleiß ausgesetzt sind. Dies gilt insbesondere für das zentral von oben in den Zyklonabscheider hineinragende Tauchrohr.In plants for producing cement clinker from cement raw meal, the raw meal is thermally treated by preheating, calcining, sintering and cooling, wherein the exhaust gas stream of the sintering stage and the exhaust air stream of the cooling stage separated from the clinker cooler or together in a fueled calcination even outside the sintering furnace for calcination be used of the raw meal. The preheating usually consists of several superposed Schwebegas-Wärmetauscherzyklonen that are successively traversed by cement raw meal in the combined DC / countercurrent to the hot exhaust gas of the calcination or the rotary kiln. In the process, the precalcined material in the calcining stage becomes the lowest cyclone of the cyclone-floating gas-exchanger system separated from the hot gas and introduced into the rotary kiln. It is understood that the hot gas cyclones of Zyklonschwebegas heat exchanger strand, in particular the lowermost cyclone, with hot gas and hot meal a temperature of z. B. 700 to 950 ° C comes into contact, a high mechanical, chemical and thermal stress and thus a high thermochemical and abrasive wear are exposed. This applies in particular to the immersion tube projecting centrally from above into the cyclone separator.
Es ist daher schon bekannt (DE-C-32 28 902), bei einem diesen hohen Beanspruchungen ausgesetzten Zyklonabscheider das Tauchrohr aus mehreren Segmenten zusammenzusetzen und die Tauchrohrsegmente mittels hakenförmiger Ausbildung an der Zyklondecke aufzuhängen oder vermittels radial angeordneter Schraubenbolzen mit der durch eine Feuerfestauskleidung isolierten Gasabzugsleitung des Zyklons lösbar zu verbinden, um Verformungen am Tauchrohrmantel selbst bei hohen thermischen Wechselbelastungen zu vermeiden und im Verschleißfall einzelne Tauchrohrsegmente mit verhältnismäßig geringem Zeit- und Arbeitsaufwand erneuern zu können. Dabei waren aber die Schraubverbindungen der Tauchrohrsegmente nicht gegen die thermochemischen Belastungen geschützt, mit der Folge, daß die Gefahr nicht ausgeschlossen war, daß sich die Schraubverbindung nach einer gewissen Zeit löste, wonach bei fehlender weiterer Sicherung das betreffende Tauchrohrsegment nach unten in den Zyklonabscheider fallen kann.It is therefore already known (DE-C-32 28 902) to assemble the immersion tube of a plurality of segments and suspended the Tauchrohrsegmente means hook-shaped training on the cyclone ceiling or by means of radially arranged bolts with the isolated by a refractory lining gas discharge line at a cyclone exposed to these high stresses detachably connect the cyclone in order to avoid deformation of the dip tube casing even at high thermal cycling and to renew individual dip tube segments with relatively little time and effort in case of wear can. But the screw connections of the dip tube segments were not protected against the thermochemical loads, with the result that the risk was not excluded that the screw solved after a certain time, after which the missing immersion tube segment can fall down into the cyclone separator in the absence of further assurance ,
Der Erfindung liegt daher die Aufgabe zu Grunde, für Zementklinkerherstellungsanlagen mit Zyklonschwebegas-Wärmetauschersystem einen Zyklonabscheider mit segmentiertem Tauchrohr zu schaffen, bei dem die lösbare Tauchrohrsegment-Befestigung sicher ist und sich durch eine hohe Standzeit auszeichnet.The invention is therefore based on the object to provide for cement clinker production plants with Zyklonschwebegas heat exchanger system a cyclone separator with segmented dip tube, in which the detachable dip tube segment attachment is safe and is characterized by a long service life.
Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.This object is achieved with the features of claim 1. Advantageous developments are specified in the subclaims.
Charakteristisch für den erfindungsgemäßen Zyklonabscheider mit segmentiertem Tauchrohr, bei dem die Tauchrohrsegmente an ihren oberen Enden durch etwa radial angeordnete Schraubenbolzen mit der Zyklondecke bzw. mit der Zyklongasabzugsleitung lösbar verbunden sind, ist, daß die Schraubenbolzen in um den Tauchrohrumfang verteilten Distanzbuchsen angeordnet sind, die nach außen (d. h. radial außen liegend) jeweils wenigstens eine fensterartige Öffnung zum Zutritt von Umgebungsluft als Kühlmedium für die Tauchrohrsegment-Befestigung aufweisen. Mit dieser Konstruktion wird erreicht, daß die Schraubenbolzen die von der Tauchrohrinnenseite her einwirkenden hohen Temperaturen, die bei Heißgas-Zyklonen im unteren Bereich eines Zyklonschwebegas-Wärmetauschersystems einer Zementklinkerherstellungsanlage ohne weiteres etwa 900°C betragen können, auf die durch die fensterartigen Öffnungen der Distanzbuchsen zugängliche Umgebungsluft als Kühlluft gut ableiten können. Es wäre auch möglich, den Innenraum der Distanzbuchsen mit den Schraubenbolzen durch die fensterartigen Öffnungen hindurch mittels Gebläse oder dergleichen mit Zwangsbelüftung zu versehen sowie ggf. auch mit einer Zuführung und Abführung sogar für ein flüssiges Kühlmedium.Characteristic of the cyclone separator according to the invention with segmented dip tube, in which the dip tube segments are detachably connected at their upper ends by approximately radially arranged bolts with the cyclone ceiling or with the Zyklongasabzugsleitung, that the bolts are arranged in distributed around the dip tube circumference spacers, according to outside (ie radially outward) each have at least one window-like opening for access of ambient air as a cooling medium for the dip tube segment attachment. With this construction it is achieved that the bolts acting on the inside of the immersion tube high temperatures, which may be about 900 ° C at hot gas cyclones in the lower part of a Zyklonschwebegas heat exchanger system of a cement clinker production plant readily accessible to the through the window-like openings of the spacers Ambient air can dissipate well as cooling air. It would also be possible to provide the interior of the spacers with the bolts through the window-like openings by means of blower or the like with forced ventilation and possibly even with a supply and discharge even for a liquid cooling medium.
Dadurch, daß nach einer weiteren bevorzugten Ausführungsform der Erfindung der an der Tauchrohrinnenseite in einer entsprechenden Ausnehmung des Tauchrohrsegments sowie in der Distanzbuchse angeordnete Kopf der Schraubenbolzen jeweils durch einen Deckel abgedeckt ist, sind die Schraubenbolzen von dieser Seite her gegen mechanische und thermochemische Beanspruchung geschützt. Insgesamt ergibt sich dadurch eine hohe Standzeit der erfindungsgemäßen lösbaren Befestigung der Tauchrohrsegmente eines thermochemisch hoch beanspruchten Zyklonabscheiders besonders für die heißen Zonen eines Zyklonschwebegas-Wärmetauscherstranges.Characterized in that, according to a further preferred embodiment of the invention, arranged on the immersion tube inside in a corresponding recess of the dip tube segment and in the spacer bushing head of the bolts is covered in each case by a cover, the bolts are protected from this side against mechanical and thermochemical stress. Overall results thereby a long service life of the inventive detachable attachment of the dip tube segments of a thermochemically highly stressed cyclone separator especially for the hot zones of a cyclone float gas heat exchanger strand.
Nach einer weiteren bevorzugten Ausführungsform der Erfindung können die Tauchrohrsegmente am oberen Ende einen nach außen winkelförmig vorstehenden im Querschnitt hakenförmigen Vorsprung aufweisen, mit dem die Tauchrohrsegmente in einen Steg eingreifen, der sich von der Innenseite der Distanzbuchsen nach oben erstreckt. Diese kombinierte Befestigung der Tauchrohrsegmente durch Einhängen und Verschrauben bietet ein hohes Maß an Sicherheit der Befestigung. Außerdem wird die Montage erleichtert, wenn die Segmente zuerst eingehängt werden, wodurch das Gewicht der Segmente abgesetzt wird, und wenn anschließend die hängenden Tauchrohrsegmente ausgerichtet und verschraubt werden.According to a further preferred embodiment of the invention, the dip tube segments may have at the upper end an outwardly angled protruding in cross-section hook-shaped projection, with which the dip tube segments engage in a web extending from the inside of the spacer sleeves upwards. This combined attachment of the dip tube segments by hooking and bolting provides a high degree of security of attachment. In addition, the assembly is facilitated when the segments are hung first, whereby the weight of the segments is discontinued, and then when the hanging dip tube segments are aligned and screwed.
Zur Verbindung von je zwei nebeneinander und untereinander angeordneter Tauchrohrsegmente, also von insgesamt vier Tauchrohrsegmenten kann nach einer weiteren bevorzugten Ausführungsform der Erfindung im Kreuzungs-Stoßbereich, in dem zwei nebeneinander benachbarte und zwei darunter angeordnete Tauchrohrsegmente aneinandergrenzen, eine den Kreuzungs-Stoßbereich an einer Seite der Segmente überdeckende Halteplatte angeordnet sein mit vier Querbolzen, die durch vier entsprechende Löcher in den vier aneinandergrenzenden Ecken der Tauchrohrsegmente hindurchgesteckt sind, wobei dann auf den hindurchgesteckten vier Querbolzen Querriegel zur Sicherung der Halteplatte befestigt werden.To connect two side by side and mutually arranged dip tube segments, that is, a total of four dip tube segments can according to a further preferred embodiment of the invention in the intersection thrust area in which adjacent two adjacent and two submerged dip tube segments adjoin one another, the crossing joint area on one side Segments covering the holding plate may be arranged with four transverse bolts which are inserted through four corresponding holes in the four adjacent corners of the dip tube segments, then being fastened to the inserted through four transverse bolts crossbar to secure the retaining plate.
Die Erfindung und deren weitere bevorzugte Ausführungsformen und Vorteile werden anhand des in den Figuren schematisch dargestellten Ausführungsbeispieles näher erläutert.The invention and its further preferred embodiments and advantages will be explained in more detail with reference to the embodiment schematically illustrated in the figures.
Es zeigt:
- Figur 1:
- einen Vertikalschnitt durch die erfindungsgemäße Tauchrohrsegment-Befestigung längs der Linie I - I der Figur 2;
- Figur 2:
- die Seitenansicht auf die Tauchrohrsegment-Befestigung der Figur 1 gesehen von rechts, und
- Figur 3:
- einen Horizontalschnitt durch die Tauchrohrsegment-Befestigung längs der Linie A - A sowie ausschnittsweise längs der Linie B -B der Figur 2.
- FIG. 1:
- a vertical section through the dip tube segment attachment according to the invention along the line I - I of Figure 2;
- FIG. 2:
- the side view of the dip tube segment attachment of Figure 1 seen from the right, and
- FIG. 3:
- a horizontal section through the dip tube segment attachment along the line A - A and partially along the line B -B of Figure 2.
Figur 1 zeigt von einem Zyklonabscheider ausschnittsweise die Zyklondecke 10, die innen mit einer Feuerfestauskleidung 11 versehen ist. In den Zyklon münden tangential Heißgas und Zementrohmehl einer Anlage zur Herstellung von Zementklinker ein. Für die Gasabführung ragt zentral von oben in den Zyklonabscheider ein Tauchrohr hinein, das aus einer Vielzahl von Segmenten zusammengesetzt und an der Zyklondecke 10 aufgehängt ist. So sind in Figur 2 zwei nebeneinander angeordnete Tauchrohrsegmente 12 und 13 zu sehen, an denen unten wiederum die weiteren Tauchrohrsegmente 14 und 15 usw. angehängt sind. Von der Zyklondecke 10 geht zentral nach oben die innen mit einer Feuerfestauskleidung 16 ausgestattet Gasabzugsleitung 17 ab.FIG. 1 shows a detail of a cyclone separator of the cyclone ceiling 10, which is internally provided with a refractory lining 11. Tangentially hot gas and cement raw meal from a plant for the production of cement clinker flow into the cyclone. For the gas discharge projects centrally from above into the cyclone a dip tube, which is composed of a plurality of segments and suspended from the cyclone ceiling 10. Thus, two side by side arranged immersion tube segments 12 and 13 can be seen in Figure 2, below which in turn the other dip tube segments 14 and 15, etc. are attached. From the cyclone ceiling 10 is centrally upwards from the inside equipped with a refractory lining 16 gas discharge line 17 from.
Die Tauchrohrsegmente 12, 13 etc. der obersten um den Tauchrohrumfang verteilten Reihe weisen einen nach außen winkelförmig vorstehenden Vorsprung 18 auf, mit dem die Tauchrohrsegmente in einen Steg 19 eingreifen, der sich von der Innenseite von Distanzbuchsen 20 nach oben erstreckt. Die Distanzbuchsen 20 sind um den Tauchrohrumfang verteilt auf der Zyklondecke 10 aufgelagert, an der Gasleitung 17 befestigt und etwa radial zum Tauchrohrzentrum angeordnet. In den Distanzbuchsen 20 ist jeweils ein etwa radial angeordneter Schraubenbolzen 21 angeordnet, mit dem das Tauchrohrsegment 12 mit der isolierten Gasabzugsleitung 17 lösbar zu verbinden ist.The dip tube segments 12, 13, etc. of the uppermost row distributed around the dip tube circumference have an outwardly angled projecting projection 18, with which the dip tube segments engage in a web 19 which extends from the inside of spacer sleeves 20 upwards. The spacers 20 are distributed around the Tauchrohrumfang distributed on the cyclone ceiling 10, at the Gas line 17 is fixed and arranged approximately radially to the dip tube center. In the spacer bushings 20, an approximately radially arranged bolt 21 is arranged in each case, with which the dip tube segment 12 is to be detachably connected to the insulated gas discharge line 17.
Zur Montageerleichterung werden die Tauchrohrsegmente 12 etc. zunächst mittels ihrer hakenförmigen Vorsprünge 18 in den Distanzbuchsen 20 bzw. deren Stegen 19 eingehängt, wodurch das Gewicht der Segmente abgesetzt wird. Anschließend werden die Segmente ausgerichtet und verschraubt.For ease of assembly, the dip tube segments 12, etc. are first hung by means of their hook-shaped projections 18 in the spacers 20 and their webs 19, whereby the weight of the segments is discontinued. Then the segments are aligned and screwed.
Erfindungsgemäß haben die um den Tauchrohrumfang verteilten Distanzbuchsen 20, in denen die Schraubenbolzen 21 angeordnet sind, jeweils wenigstens eine nach außen fensterartige Öffnung 22 zum Zutritt von Umgebungsluft als Kühlmedium für die Tauchrohrsegment-Befestigung. Auf diese Weise können die Schraubenbolzen 21 die von der Tauchrohrinnenseite einwirkenden hohen Temperaturen gut nach außen an die Umgebungsluft ableiten. Hinzu kommt, daß der Kopf der Schraubenbolzen 21, der an der Tauchrohrinnenseite in einer entsprechenden Ausnehmung des Tauchrohrsegments 12 etc. sowie in der Distanzbuchse 20 angeordnet ist, jeweils durch einen Deckel 23 abgedeckt ist, der die lösbare Befestigung der Tauchrohrsegmente gegen die hohe thermochemische Beanspruchung schützt. Der Deckel 23 kann nach seiner Montage noch durch eine Heftschweißnaht am Tauchrohrsegment 12 etc. gesichert sein. Jedenfalls ist die erfindungsgemäße Tauchrohrsegmentbefestigung durch eine hohe Standzeit gekennzeichnet.According to the distributed around the dip tube circumference spacers 20, in which the bolts 21 are arranged, each have at least one outwardly window-like opening 22 for access of ambient air as a cooling medium for the dip tube segment attachment. In this way, the bolts 21 can derive the high temperatures acting from the immersion tube inside out well to the outside to the ambient air. In addition, the head of the bolts 21, which is arranged on the immersion pipe inside in a corresponding recess of the dip tube segment 12, etc. and in the spacer sleeve 20, each covered by a lid 23, which is the detachable attachment of the dip tube segments against the high thermochemical stress protects. The lid 23 may still be secured by a tack weld on the dip tube segment 12 after its installation. In any case, the Tauchrohrsegmentbefestigung invention is characterized by a long service life.
In Figur 1 ist noch zu sehen, daß die Schraubenbolzen 21 einen verdickten Kopf 24 haben, der in eine Ausnehmung einer Kappe 25 eingelassen ist, mittels welcher das Tauchrohrsegment 12 an die Innenseite der Distanzbuchsen 20 bzw. an deren Innensteg 19 spannbar ist. Die Schraubenbolzen 21 weisen am radial außen liegenden Ende Muttern 26 auf, mittels denen sie über Tellerfedern 27 und über eine Scheibe 28 am Außenumfang der Distanzbuchsen 20 abgestützt sind.In Figure 1 can still be seen that the bolts 21 have a thickened head 24 which is inserted into a recess of a cap 25, by means of which the dip tube segment 12 to the inside the spacer sleeves 20 and at the inner web 19 can be tensioned. The bolts 21 have at the radially outer end of nuts 26, by means of which they are supported by disc springs 27 and a pulley 28 on the outer circumference of the spacer bushes 20.
Im Kreuzungs-Stoßbereich, in dem jeweils zwei nebeneinander benachbarte und zwei darunter angeordnete Tauchrohrsegmente (12, 13, 14, 15) aneinandergrenzen, kann eine den Kreuzungs-Stoßbereich an einer Seite der Segmente abdeckende Halteplatte 29 angeordnet sein mit vier Querbolzen 30, 31, 32 ,33, die durch vier entsprechende Löcher in den vier aneinandergrenzenden Ecken der Tauchrohrsegmente hindurchgesteckt sind, wobei auf den hindurchgesteckten vier Querbolzen Querriegel 34, 35 zur Sicherung der Halteplatte 29 befestigt sind. Die Querriegel 34, 35 können wie gezeichnet vertikal angeordnet sein, aber auch horizontal oder diagonal. Die Außenkontur der Halteplatte 29 kann viereckig, quadratisch, rund etc. sein, und sie kann zentral auch eine Ausnehmung 36 aufweisen, z. B. ein rundes Loch, was zur Gewichtsersparnis bei der Halteplatte 29 beiträgt. Die unterste Reihe der Tauchrohrsegmente ist unten zweckmäßigerweise nur mit Querriegeln 37 stabilisiert.In the crossing joint area, in which adjacent two adjacent and two submerged immersed pipe segments (12, 13, 14, 15) adjoin one another, a holding plate 29 covering the crossing joint area on one side of the segments can be arranged with four transverse bolts 30, 31, 32, 33, which are inserted through four corresponding holes in the four adjacent corners of the dip tube segments, wherein on the inserted through four transverse bolts crossbars 34, 35 are secured to secure the retaining plate 29. The crossbars 34, 35 may be arranged vertically as drawn, but also horizontally or diagonally. The outer contour of the retaining plate 29 may be square, square, round, etc., and they may centrally have a recess 36, z. B. a round hole, which contributes to the weight savings in the holding plate 29. The bottom row of dip tube segments is conveniently stabilized below only with cross bars 37.
Claims (6)
- Cyclone separator, in particular for direct heat transfer from the hot off-gases from a rotary tubular kiln cyclone suspension heat exchanger system for the production of cement clinker to the cement raw meal, with gas and raw meal being supplied tangentially, material being discharged in the lower region of the cyclone, and with an immersion pipe, which projects centrally from above into the cyclone separator, is suspended from the ceiling (10) of the cyclone and is composed of a plurality of segments, for discharging gas, the immersion-pipe segments (12, 13) being releasably connected, at their upper end, by means of threaded bolts (21), to the gas take-off line (17), which is insulated by refractory lining, characterized in that the threaded bolts (21) are arranged in spacer sleeves (20) which are distributed around the circumference of the immersion pipe and on the outside each have at least one window-like opening (22) providing access for ambient air as cooling medium for the securing means for the immersion-pipe segments.
- Cyclone separator according to Claim 1, characterized in that the head of the threaded bolts (21), which on the inner side of the immersion pipe is arranged in a corresponding recess in the immersion-pipe segment (12) and in the spacer sleeve (20), is in each case covered by a cover (23).
- Cyclone separator according to Claim 2, characterized in that the threaded bolts (21) have a thickened head (24), which is set into a recess in a cap (25), by means of which the immersion-pipe segment (12) can be clamped to the inner side of the spacer sleeve (20).
- Cyclone separator according to one of Claims 1 to 3, characterized in that the threaded bolts (21), at the radially outer end, have nuts (26), by means of which they are supported, via cup springs (27), on the outer circumference of the spacer sleeves (20).
- Cyclone separator according to one of Claims 1 to 4, characterized in that the immersion-pipe segments (12, 13), at the upper end, have a protuberance (18) which projects outwards in angled-off form and by means of which the immersion-pipe segments engage in a web (19) which extends upwards from the inner side of the spacer sleeves (20).
- Cyclone separator according to Claim 1, characterized in that in the crossing abutment region, in which in each case two immersion-pipe segments which adjoin one another and two immersion-pipe segments arranged below them (12, 13, 14, 15) adjoin one another, there is a holding plate (29), which covers the crossing abutment region on one side of the segments and has four transverse bolts (30, 31, 32, 33), which are fitted through four corresponding holes in the four adjacent corners of the immersion-pipe segments, and in that, in order to retain the holding plate (29), crossbars (34, 35) are secured to the four transverse bolts which have been fitted through.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19825206A DE19825206A1 (en) | 1998-06-05 | 1998-06-05 | Cyclone separator |
| DE19825206 | 1998-06-05 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0962255A2 EP0962255A2 (en) | 1999-12-08 |
| EP0962255A3 EP0962255A3 (en) | 2001-03-14 |
| EP0962255B1 true EP0962255B1 (en) | 2003-01-29 |
Family
ID=7870050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99110035A Expired - Lifetime EP0962255B1 (en) | 1998-06-05 | 1999-05-22 | Cyclone separator |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6214075B1 (en) |
| EP (1) | EP0962255B1 (en) |
| AT (1) | ATE231743T1 (en) |
| DE (2) | DE19825206A1 (en) |
| DK (1) | DK0962255T3 (en) |
| ES (1) | ES2189313T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014019472A1 (en) | 2014-12-23 | 2016-06-23 | Khd Humboldt Wedag Gmbh | Immersion tube for a cyclone separator |
Families Citing this family (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10214863A1 (en) | 2002-04-04 | 2003-10-16 | Kloeckner Humboldt Wedag | cyclone |
| US8075668B2 (en) | 2005-03-29 | 2011-12-13 | Dresser-Rand Company | Drainage system for compressor separators |
| EP2063978B1 (en) * | 2006-09-19 | 2014-07-09 | Dresser-Rand Company | Rotary separator drum seal |
| CA2663531C (en) | 2006-09-21 | 2014-05-20 | William C. Maier | Separator drum and compressor impeller assembly |
| CA2662780C (en) | 2006-09-25 | 2015-02-03 | William C. Maier | Axially moveable spool connector |
| US8061737B2 (en) | 2006-09-25 | 2011-11-22 | Dresser-Rand Company | Coupling guard system |
| EP2066453A4 (en) | 2006-09-25 | 2012-04-04 | Dresser Rand Co | Fluid deflector for fluid separator devices |
| EP2066948A4 (en) | 2006-09-25 | 2012-01-11 | Dresser Rand Co | Access cover for pressurized connector spool |
| WO2008039733A2 (en) | 2006-09-25 | 2008-04-03 | Dresser-Rand Company | Compressor mounting system |
| EP2415507A1 (en) | 2006-09-26 | 2012-02-08 | Dresser-Rand Company | Improved static fluid separator device |
| WO2009111616A2 (en) | 2008-03-05 | 2009-09-11 | Dresser-Rand Company | Compressor assembly including separator and ejector pump |
| US8062400B2 (en) | 2008-06-25 | 2011-11-22 | Dresser-Rand Company | Dual body drum for rotary separators |
| US8079805B2 (en) | 2008-06-25 | 2011-12-20 | Dresser-Rand Company | Rotary separator and shaft coupler for compressors |
| US7922218B2 (en) | 2008-06-25 | 2011-04-12 | Dresser-Rand Company | Shear ring casing coupler device |
| US8210804B2 (en) | 2009-03-20 | 2012-07-03 | Dresser-Rand Company | Slidable cover for casing access port |
| US8087901B2 (en) | 2009-03-20 | 2012-01-03 | Dresser-Rand Company | Fluid channeling device for back-to-back compressors |
| US8061972B2 (en) | 2009-03-24 | 2011-11-22 | Dresser-Rand Company | High pressure casing access cover |
| BR112012005866B1 (en) | 2009-09-15 | 2021-01-19 | Dresser-Rand Company | apparatus for separating a fluid and method for separating a component of higher specific weight from a component of lower specific weight of a fluid |
| US20110097216A1 (en) * | 2009-10-22 | 2011-04-28 | Dresser-Rand Company | Lubrication system for subsea compressor |
| EP2533905B1 (en) | 2010-02-10 | 2018-07-04 | Dresser-Rand Company | Separator fluid collector and method |
| DE102010007936A1 (en) * | 2010-02-12 | 2011-08-18 | Outotec Oyj | Diving tube delivery and cyclone hereby |
| WO2012009159A2 (en) | 2010-07-15 | 2012-01-19 | Dresser-Rand Company | Radial vane pack for rotary separators |
| US8673159B2 (en) | 2010-07-15 | 2014-03-18 | Dresser-Rand Company | Enhanced in-line rotary separator |
| WO2012012018A2 (en) | 2010-07-20 | 2012-01-26 | Dresser-Rand Company | Combination of expansion and cooling to enhance separation |
| US8821362B2 (en) | 2010-07-21 | 2014-09-02 | Dresser-Rand Company | Multiple modular in-line rotary separator bundle |
| EP2614216B1 (en) | 2010-09-09 | 2017-11-15 | Dresser-Rand Company | Flush-enabled controlled flow drain |
| WO2013109235A2 (en) | 2010-12-30 | 2013-07-25 | Dresser-Rand Company | Method for on-line detection of resistance-to-ground faults in active magnetic bearing systems |
| US8994237B2 (en) | 2010-12-30 | 2015-03-31 | Dresser-Rand Company | Method for on-line detection of liquid and potential for the occurrence of resistance to ground faults in active magnetic bearing systems |
| WO2012138545A2 (en) | 2011-04-08 | 2012-10-11 | Dresser-Rand Company | Circulating dielectric oil cooling system for canned bearings and canned electronics |
| EP2715167B1 (en) | 2011-05-27 | 2017-08-30 | Dresser-Rand Company | Segmented coast-down bearing for magnetic bearing systems |
| US8851756B2 (en) | 2011-06-29 | 2014-10-07 | Dresser-Rand Company | Whirl inhibiting coast-down bearing for magnetic bearing systems |
| CN105636786B (en) * | 2013-08-09 | 2018-05-18 | 伟尔矿物澳大利亚私人有限公司 | cyclone separator device and production method |
| US10328439B2 (en) | 2016-07-13 | 2019-06-25 | Wahl Refractory Solutions, Llc | Thimble for cyclone separator |
| US10940492B2 (en) | 2016-07-13 | 2021-03-09 | Fosbel Wahl Holdings, Llc | Thimble for cyclone separator |
| WO2018167586A1 (en) * | 2017-03-11 | 2018-09-20 | Mofazali Abbas | Fabrication of immersion tube with shackle for cement rotary kiln |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1844369A (en) * | 1929-02-12 | 1932-02-09 | Lewis P Ross | Dust separator |
| US1916762A (en) * | 1931-05-08 | 1933-07-04 | Locomotive Firebox Co | Spark arrester |
| US3273320A (en) * | 1963-07-15 | 1966-09-20 | Exxon Research Engineering Co | Cyclone separator for high temperature operations |
| DE3228902A1 (en) * | 1982-08-03 | 1984-02-09 | Klöckner-Humboldt-Deutz AG, 5000 Köln | CYCLONE SEPARATOR |
| DK205583A (en) * | 1983-05-09 | 1984-11-10 | Hasle Klinker & Chamott | CENTRAL ROOMS FOR CYCLON TO CLEAN HOT GAS |
| SE8801635L (en) * | 1988-04-29 | 1989-10-30 | William Robinson | SECTIONS DIVIDED HYDROCYCLON |
| DE4236895A1 (en) * | 1992-10-31 | 1994-05-05 | Maury Hans Dietmar | Dip tube for a centrifugal separator (cyclone) |
-
1998
- 1998-06-05 DE DE19825206A patent/DE19825206A1/en not_active Withdrawn
-
1999
- 1999-05-22 DK DK99110035T patent/DK0962255T3/en active
- 1999-05-22 DE DE59904133T patent/DE59904133D1/en not_active Expired - Lifetime
- 1999-05-22 ES ES99110035T patent/ES2189313T3/en not_active Expired - Lifetime
- 1999-05-22 AT AT99110035T patent/ATE231743T1/en active
- 1999-05-22 EP EP99110035A patent/EP0962255B1/en not_active Expired - Lifetime
- 1999-06-03 US US09/324,882 patent/US6214075B1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014019472A1 (en) | 2014-12-23 | 2016-06-23 | Khd Humboldt Wedag Gmbh | Immersion tube for a cyclone separator |
| DE102014019472B4 (en) * | 2014-12-23 | 2018-01-04 | Khd Humboldt Wedag Gmbh | Immersion tube for a cyclone separator |
Also Published As
| Publication number | Publication date |
|---|---|
| DK0962255T3 (en) | 2003-06-23 |
| DE59904133D1 (en) | 2003-03-06 |
| EP0962255A3 (en) | 2001-03-14 |
| US6214075B1 (en) | 2001-04-10 |
| DE19825206A1 (en) | 1999-12-09 |
| ATE231743T1 (en) | 2003-02-15 |
| ES2189313T3 (en) | 2003-07-01 |
| EP0962255A2 (en) | 1999-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0962255B1 (en) | Cyclone separator | |
| EP1350571B1 (en) | Cyclone separator with segmented immersion pipe | |
| DE3322119A1 (en) | COMBUSTION PLANT WITH REGENERATIVE HEAT EXCHANGER | |
| DE3027303C2 (en) | Fluidized bed incinerator | |
| DE2349702A1 (en) | SEPARATION PLANT WITH A ROW OF HYDROCYCLONES | |
| WO2007036560A1 (en) | Separator for liquids, in particular condensate, from liquid-loaded compressed gases | |
| EP0071742B1 (en) | Combustion chamber for a combustion apparatus | |
| EP3237116B1 (en) | Immersion pipe for a cyclone separator | |
| CH645713A5 (en) | HEAT EXCHANGER. | |
| DE2810024A1 (en) | MULTIPLE CYCLONE SEPARATOR | |
| DD150363A5 (en) | WATER-COOLED LID FOR INDUSTRIAL OVEN | |
| DE102010036587A1 (en) | Hanging wall for deflecting hot gases in calcium carbonate burning furnace, has recesses provided for fastening of wall elements and area of refractory material, where fixed weight of material does not exceed strength of material of holders | |
| DE3626889C2 (en) | ||
| EP0089486A2 (en) | Column of fluidised chambers | |
| DE1442388A1 (en) | Multiple hydrocyclone system | |
| EP4118390B1 (en) | Cooler for cooling bulk material, in particular cement clinker | |
| BE1028148B1 (en) | Cooler for cooling bulk goods, in particular cement clinker | |
| DE1433533C3 (en) | Muzzle ring for metallurgical vessels, especially for steel works converters | |
| DE3526346A1 (en) | SHAFT OVEN FOR DIRECT REDUCTION OF IRON ORE | |
| DE3934032A1 (en) | HEAT TRANSFER OR FILLER ELEMENT | |
| DE2358678A1 (en) | Regenerative heat exchanger for gases - having rotating hood over fixed heat transfer elements with common chamber below | |
| DE102020203289A1 (en) | Cooler for cooling bulk goods, in particular cement clinker | |
| DE3245702A1 (en) | INLET FOR TURN DRUM | |
| EP0715141B1 (en) | Installation for the heat treatment of fines | |
| DE2621004A1 (en) | Vertical shaft furnace for mfg. cement clinker - using gas or oil burned in bell chamber suspended in upper part of shaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE DE DK ES FR GB |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 20010905 |
|
| AKX | Designation fees paid |
Free format text: AT BE DE DK ES FR GB |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHILLING, HORST Inventor name: FILGES, RALF |
|
| AK | Designated contracting states |
Designated state(s): AT BE DE DK ES FR GB |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REF | Corresponds to: |
Ref document number: 59904133 Country of ref document: DE Date of ref document: 20030306 Kind code of ref document: P |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20030501 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2189313 Country of ref document: ES Kind code of ref document: T3 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20031030 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20150521 Year of fee payment: 17 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20160512 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20160520 Year of fee payment: 18 Ref country code: FR Payment date: 20160520 Year of fee payment: 18 Ref country code: DK Payment date: 20160519 Year of fee payment: 18 Ref country code: BE Payment date: 20160519 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20160722 Year of fee payment: 18 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20160522 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160522 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59904133 Country of ref document: DE |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP Effective date: 20170531 |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 231743 Country of ref document: AT Kind code of ref document: T Effective date: 20170522 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170522 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20180131 |
|
| REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20170531 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170531 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20171201 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170531 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20180626 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170523 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170531 |