DK171924B1

DK171924B1 - A cooler

Info

Publication number: DK171924B1
Application number: DK112093A
Authority: DK
Inventors: Sigfred Kristian Nielsen
Original assignee: Smidth & Co As F L
Priority date: 1993-10-06
Filing date: 1993-10-06
Publication date: 1997-08-11
Also published as: DK112093A; DK112093D0; BR9407756A; EP0730722A1; DE69409826D1; WO1995010014A1; CN1132551A; EP0730722B1

Description

DK 171924 B1 iDK 171924 B1 i

Den foreliggende opfindelse angår en ristkøler til afkøling af kornformet materiale, så som cementklinker eller lignende, hvilken køler omfatter en ristflade, der er opbygget af et antal fortrinsvis overlappende rækker af ristplader, og som 5 lateralt afgrænses og overlappes af langsgående vinkelstykker, der er fastgjort til kølerens sidevægge på en sådan måde, at spalter er tilvejebragt mellem vinkelstykkerne og de laterale ristplader.BACKGROUND OF THE INVENTION The present invention relates to a grate cooler for cooling granular material such as cement clinker or the like, comprising a grate surface formed by a plurality of preferably overlapping rows of grate plates, which are laterally delimited and overlapped by longitudinal angles fixed to the radiator side walls in such a way that slots are provided between the angles and the lateral grate plates.

10 Fra EP patentskrift nr. 378821 kendes en ristkøler, hvor spalterne mellem ristfladens laterale ristplader og kølerens sidevægge er tætnet ved hjælp af vinkelstykker. Denne kendte ristkøler omfatter endvidere en spændeindretning, der tvinger ristfladen i retning mod vinkelstykkerne, for derved at 15 reducerer spaltebredden mest muligt ved variende driftstilstande.10 From EP patent specification 378821 a grate cooler is known in which the gaps between the lateral grate plates of the grating surface and the side walls of the radiator are sealed by means of angular pieces. This known grate cooler further comprises a clamping device which forces the grating surface in the direction of the angular pieces, thereby reducing the gap width as much as possible in varying operating conditions.

Ulempen ved denne kendte ristkøler er imidlertid, at den relativt ofte skal nedlukkes for vedligeholdelse. Dette 20 skyldes, at varmt og fint klinkermateriale uværgeligt vil bevæge sig ind i spalten mellem ristfladen og vinkelstykkerne, og her forårsage en sådan nedslidning af såvel ristfladens laterale ristplader som vinkelstykker, at disse konstruktionselementer jævnligt skal udskiftes. Ved nedslid-25 ningen vokser spaltebredden uønsket under kølerens drift, uden at kunne blive udlignet af spændeindretningen, da nedslidningen ikke er ensartet.However, the disadvantage of this known grate cooler is that it must be shut down relatively often for maintenance. This is due to the fact that hot and fine clinker material will inadvertently move into the gap between the grating surface and the angular pieces, and here causing such wear of both the lateral grating plates and the angular grids that these structural elements must be regularly replaced. Upon wear, the gap width grows undesirably during the operation of the cooler, without being able to be offset by the clamping device, as the wear is not uniform.

Formålet med den foreliggende opfindelse er at angive en 30 ristkøler, hvormed ovennævnte ulempe undgås.The object of the present invention is to provide a grate cooler which avoids the above disadvantage.

Dette opnås ved en ristkøler af den i indledningen angivne art, og som er kendetegnet ved, at sidevæggene omfatter hule bjælker, der er anbragt i niveau med vinkel s tykkerne, og som 35 er forbundet med en luftforsyningskilde, at hvert vinkelstykke er udformet med gennemgående kanaler, der strækker sig fra spalten til vinkelstykkets flade vendende mod den DK 171924 B1 2 tilhørende hule bjælke, hvor kanalerne via hvert sit hul i bjælken står i forbindelse med dennes indre, således at luft kan indblæses i spalterne mellem vinkelstykkerne og de laterale ristplader.This is accomplished by a grate cooler of the kind set forth in the preamble, characterized in that the side walls comprise hollow beams arranged at the level of the angular thicknesses and connected to an air supply source, that each angular piece is formed with through passageways extending from the slot to the plane of the angle piece facing the hollow beam associated with the channel, where the channels through each hole in the beam communicate with its interior, so that air can be injected into the slots between the angle pieces and the lateral grate plates.

55

Herved opnås det, at spalterne mellem vinkelstykkerne og de laterale ristplader holdes fri for klinkermateriale, således at sliddet i dette område er minimeret.In this way it is achieved that the gaps between the angles and the lateral grate plates are kept free of clinker material, so that the wear in this area is minimized.

10 Det foretrækkes, at mindst en del af kanalerne udmunder i undersiden af vinkelstykkets overlappende del, men kanalerne kan også udmunde i spalten øverst i vinkelstykkets lodrette del.It is preferred that at least a portion of the channels open in the underside of the overlap portion of the angle piece, but the channels may also open in the slot at the top of the vertical portion of the angle piece.

15 1 en udførselsform for opfindelsen kan de hule bjælker være indbygget i kølerens sidevægge, i en anden udførselsform kan de være monteret på sidevæggene mellem disse og vinkelstykkerne, mens de i en tredje udførselsform kan være monteret hvilende på tværgående bjælker.In one embodiment of the invention, the hollow beams may be built into the side walls of the cooler, in another embodiment they may be mounted on the side walls between these and the angular pieces, while in a third embodiment they may be mounted resting on transverse beams.

2020

Opfindelsen skal i det følgende forklares nærmere under henvisning til tegningen, der er skematisk, og hvorThe invention will now be explained in more detail with reference to the drawings, which are schematic and where

Fig. 1. viser et tværsnit gennem en ristkøler, 25FIG. 1. shows a cross section through a grate cooler, 25

Fig. 2. viser et udsnit af en første udførselsform for ristkøleren ifølge opfindelsen,FIG. 2. shows a section of a first embodiment of the grate cooler according to the invention,

Fig. 3. viser et udsnit af en anden udførselsform for rist-30 køleren ifølge opfindelsen, ogFIG. 3 is a sectional view of another embodiment of the shaker cooler according to the invention; and

Fig. 4. viser et udsnit af en tredje udførselsform for ristkøleren ifølge opfindelsen.FIG. 4. shows a section of a third embodiment of the grate cooler according to the invention.

35 I Fig. 1 ses et udsnit af en ristkøler 1, der omfatter sidevægge 3 og en ristbund eller ristflade 5, hvorpå materiale 7, der skal afkøles, transporteres. Ristfladen 5 er opbygget af 3 DK 171924 B1 rækker af overlappende ristplader 9, der hver omfatter gennemgående slidser eller huller, ikke vist, for indblæsning af køleluft i materialet 7 på ristfladen 5. Køleluften kan, som vist på tegningen, tilføres ristpladerne 9 gruppevist via 5 et underliggende system af lufttilføringskanaler 11.In FIG. 1 is a sectional view of a grate cooler 1 comprising side walls 3 and a grate bottom or grate surface 5 on which material 7 to be cooled is transported. The grate surface 5 is constructed of 3 rows of overlapping grate plates 9, each comprising through-slits or holes, not shown, for supplying cooling air to the material 7 on the grating surface 5. The cooling air can, as shown in the drawing, be supplied to the grate plates 9 in groups via 5 shows an underlying system of air supply ducts 11.

Ristfladen 5 afgrænses og overlappes i de laterale randområder af vinkelstykker 13, der i den viste udførselsform er fastgjort direkte på kølerens sidevægge 3. Ristkølere er 10 typisk opbygget med et antal rækker af ristplader, der er bevægelige frem og tilbage i kølerens længderetning for derved at frembringe en materialetransport gennem køleren, og derfor slutter vinkelstykkerne 13 ikke tæt til disse rækkers laterale ristplader 9, men danner sammen med disse fine 15 spalter 15.The grate surface 5 is delimited and overlapped in the lateral edge regions by angles 13, which in the illustrated embodiment are mounted directly on the side walls of the cooler 3. Grate coolers 10 are typically constructed with a number of rows of grate plates movable back and forth in the longitudinal direction of the cooler. produce a material transport through the cooler, and therefore the angular pieces 13 do not close close to the lateral grating plates 9 of these rows, but together with these fine 15 form slots 15.

Under vedligeholdelsesarbejde på ristkølere observeres derfor ofte på disse bevægelige, laterale ristplader og tilhørende vinkelstykker et væsentligt slid, der hovedsagligt' skyldes 20 varmt og fint materiale, der er trængt ind i spalterne 15.Therefore, during maintenance work on grate coolers, on these moving lateral grate plates and associated angles, significant wear is observed, mainly due to 20 hot and fine material penetrated into the slots 15.

I Fig. 2, 3 og 4 ses eksempler på, hvordan dette problem kan løses. I alle eksemplerne er der ved hver af kølerens sidevægge 3 og i niveau med vinkelstykkerne 13 anbragt en hul 25 bjælke 16, der strækker sig i kølerens længderetning, og som er forbundet med en luftforsyningskilde, ikke vist. Vinkelstykkerne 13 er forsynet med gennemgående kanaler 17, der hver via et hul 19 i bjælken 16 står i forbindelse med bjælkens indre og dermed luftforsyningskilden, og som 30 udmunder i spalten 15, enten i undersiden af vinkelstykkets overlappende del 21 eller øverst i vinkelstykket 13's lodrette del.In FIG. Examples 2, 3 and 4 show how this problem can be solved. In all the examples, at each of the radiator sidewalls 3 and at the level of the angular pieces 13, a hollow 25 beam 16 extending longitudinally of the radiator connected to an air supply source is not shown. The angular pieces 13 are provided with through-going channels 17, each communicating via a hole 19 in the beam 16 with the interior of the beam and thus the air supply source, and which 30 open into the slot 15, either in the underside of the overlapping part 21 of the angle piece or at the top of the vertical piece 13 share.

Herved kan spalterne 15 holdes rene for materiale ved 35 indblæsning af luft gennem kanalerne 17.Hereby the slots 15 can be kept clean of material by supplying air through the ducts 17.

I Fig. 2 er de hule bjælker 16 indbygget i kølerens sidevægge 4 DK 171924 B1 3, i Fig. 3 er de monteret på sidevæggene 3 mellem disse og vinkel stykkerne 13 og i Fig. 4 er de monteret hvilende på tværgående bjælker 23, der strækker sig mellem kølerens sidevægge 3.In FIG. 2, the hollow beams 16 are built into the radiator sidewalls 4 in FIG. 3, they are mounted on the side walls 3 between these and the angle pieces 13 and in FIG. 4, they are mounted resting on transverse beams 23 extending between the side walls 3 of the cooler.

5 10 15 20 25 30 355 10 15 20 25 30 35

Claims

A grate chiller (1) for cooling granular material, such as cement clinker or the like, which chiller (1) comprises a grating surface (5) formed by a plurality of preferably overlapping rows of grate plates (9), which are laterally delimited and overlapped by longitudinal angular pieces (13) attached to the side walls (3) of the cooler in such a way that slots (15) are provided between the angular pieces (13) and the lateral grate plates (9), characterized in that the side walls ( 3) comprises hollow beams (16) arranged at the level of the angular pieces (13) and connected to an air supply source, that each angular piece (13) is formed with through passages (17) extending from the slot (15). 15 to the face of the angle piece facing the associated hollow beam (16), where the channels through each of its holes (19) in the beam are connected to its interior, so that air can be blown into the slots (15) between the angle pieces and the lateral grating plates. 20

Grate cooler according to claim 1, characterized in that at least part of the channels (17) open at the underside of the overlapping part (21) of the angle piece.

Grate cooler according to claim 1, characterized in that at least part of the channels (17) open in the slot (15) at the top of the vertical part of the angle piece (13).

Grate cooler according to claims 1-3, characterized in that the hollow 30 beams (16) are built into the side walls (3) of the cooler.

Grate cooler according to claims 1-3, characterized in that the hollow beams (16) are mounted on the side walls (3) between these and the angular pieces (13). 35

5 DK 171924 B1 Patent claims.

Grate cooler according to claims 1-3, characterized in that the hollow beams (16) are mounted resting on transverse beams (23).