PT98744A

PT98744A - GRILLE GUARNICAO

Info

Publication number: PT98744A
Application number: PT98744A
Authority: PT
Inventors: Rolf Merz
Original assignee: Evt Energie & Verfahrenstech
Priority date: 1990-08-23
Filing date: 1991-08-22
Publication date: 1993-09-30
Also published as: CA2049661A1; HUT59475A; EP0472027B1; HU912726D0; ES2056533T3; EP0472027A3; PL291480A1; PL167178B1; ATE106130T1; CS259791A3; EP0472027A2; DE4026587C1

Abstract

Air-cooled grate surface, in particular for stoking grates in refuse incineration plants, two adjacently arranged grate bars in each case forming a flow channel, which is bounded by the grate bar back, the grate bar foot and its supporting webs and has an outlet to the combustion space through clearances arranged in the grate bar head. An improved cooling of the grate bar back is achieved and clogging of the air outlets by refuse and slag particles is avoided in the following way a) the air outlets formed by two clearances (7) have a cross-sectional widening in the direction of flow; b) the air outlets have an angle B = 5 DEG to 60 DEG with respect to the grate bar back (6) downwards in the direction of flow; c) the grate bar head (3) is bevelled from the top towards the rear and has from lateral edges (8) one or more clearances (7) arranged one above the other.

Description

Descrição referente à patente de invenção de EVT Energie- und Ver f ahr enstechniíc GmbH, alema, industrial e comercial, com sede em Augsburger Strasse 712, 7000Description relating to the patent of invention of EVT Energie- und Verf ahr enstechnik GmbH, German, industrial and commercial, established at Augsburger Strasse 712, 7000

Stuttgart 61, República Federal Alema, (inventor: Rolf Merz, residente na República Federal Alemã), para "GUARNIÇÃO DE GRELHA"Stuttgart 61, Federal Republic of Germany, (inventor: Rolf Merz, resident in the Federal Republic of Germany), for " GRILL GUARDING "

DESCRIÇÃO A presente invenção refere-se a uma guarnição de- grelha apoiada em suportes transversais e arrefecida por ar, em especial para grelhas de avanço nas instalações de queima de lixo, formando cada duas barras da grelha contíguas uma ao lado da outra um canal de escoamento limitado pelas costas da grelha, a parte inferior da grelha e as suas abas de apoio, e tendo saída para a câmara de combus tao através de cavidades dispostas na parte superior da grelha, sendo a parte superior da grelha inclinada para baixo e para tras e apresentando a partir dos seus bordos várias cavidades dispostas umas sobre as outras e sendo previstas por cima, entre as cavidades, saliências respectivas, que se estendem a toda a largura ou profundidade da barra da grelha.The present invention relates to a grille arranged supported on transverse supports and cooled by air, in particular for feed grills in the garbage burning facilities, each two bars of the contiguous grid forming one next to the other a feed channel. the bottom part of the grate and its support flaps and exiting the combustion chamber through cavities arranged in the upper part of the grate, the upper part of the grate being inclined downwards and backwards and having from its edges various cavities arranged one on top of the other, and overhangs are provided between the cavities, respective projections, which extend the entire width or depth of the bar of the grid.

Uma guarniçao de grelha deste género foi dada a conhecer pela patente DE-PS 37 25 585.A grid trim of this kind has been disclosed in DE-PS 37 25 585.

Esta guarniçao de grelha conhecida deu boas provas na sua utilização em serviço, mas quando do movimento de avanço das fiadas de barras da grelha pode suceder de vez em quando que 0 lixo e/ou partículas de escória penetrem nas saídas de ar das barras da grelha e se fixem devido â formação das TTf 1This known grill ladle has proved to be good in its use in service, but when from the forward movement of the grid ladders it can happen from time to time that the ladle and / or slag particles will penetrate the air outlets of the grid bars and fixate due to the formation of TTf 1

saídas de ar com a configuração de tubeiras (secção transversal crescente no sentido do escoamento do ar), sendo arrastadas quando do movimento de recuo das fiadas de barras da grelha móveis. Devido aos movimentos de vai e vem ulteriores das fiadas de grelhas móveis, o lixo e/ou as partículas de escória que penetraram são ainda mais apertadas nas saídas de ar e entopem estas últimas, dando como resultado que se prejudica a distribuição do ar, as barras da grelha aquecem demasiado e provocam-se avarias. 0 objectivo da presente invenção, como se descreve na reivindicação 1, consiste em proporcionar uma guarnição de grelha de acordo com o preâmbulo da referida reivindicação que reduza o perigo de entupimento das saídas de ar. resolve-se com as 0 problema medidas indicadas na reivindicação 1 .air vents with nozzle configuration (increasing cross-section in the direction of air flow), being entrained when moving backward of the rows of movable grid bars. Due to the subsequent back and forth movements of the rows of moving grates, the litter and / or slag particles that have penetrated are further tightened in the air vents and entropy the latter, resulting in detrimental air distribution, bars overheat and cause breakdowns. The object of the present invention as described in claim 1 is to provide a grate trim according to the preamble of said claim which reduces the danger of clogging of the air vents. is solved with the problem measures indicated in claim 1.

Mediante a formação das saídas de ar segundo a presente invenção, as quais apresentam um aumento da secção transversal no sentido do escoamento do ar, o lixo e/ou as partículas de escória que, durante o movimento de avanço das fiadas de barras de grelhas móveis penetra ram nas saídas de ar, nao sao arrastadas quando do movimento de recuo das fiadas de barras da grelha móveis, mas sim desprendem-se dessas saídas de ar, ajudadas pela corrente de ar e caem para baixo sobre as fiadas de barras fixas da grelha, onde ardem e se descarregam as cinzas resultantes.By forming the air outlets according to the present invention, which have an increase in the cross-section towards the air flow, the waste and / or slag particles which, during the forward movement of the rows of movable grid bars penetrated into the air outlets, are not drawn away from the backward movement of the rows of movable grate bars, but are released from these air outlets, aided by the air stream and fall down onto the fixed bar rows of the grate , where the resulting ash is burned and discharged.

Alem disso, como as saídas de ar apresentam um ângulo dirigido para baixo até 60° com as costas da grelha, é dificultada a penetração do lixo e/ou das partículas de escória e, na medida em que isso seja de facto conseguido, é favorecido o desprendimento da maior parte, quando do movimento de recuo das fiadas de barras da grelha.Moreover, as the air vents have a downwardly directed downward angle of up to 60ø with the backs of the grate, it is difficult to penetrate the waste and / or slag particles and, to the extent that this is in fact achieved, is favored the detachment of the greater part, when the recoil movement of the rows of bars of the grate.

Resumindo, a configuração segundo ^ presente invenção das barras da grelha actua no sentido do arrefecimento das costas da grelha e de um serviço sem 2 -'JSviTaasiíaBS»1 . -----^ ,y-* avarias de uma grelha de avanço para uma instalaçao de queima do lixo, de maneira vantaj osa • Df sscrev e-se : a seguir com mais pormenor a presente invenç ao, com r eferência ao desi enho anexo, cu; jas fi gur as representam: A fig· 1, uma vista parcial de lado da bar ra da grelha; A Fig. 2, um c :orte d ,a barra da gre ;lha p ela linha (A-A); A fig · 3, um coi rte de duas barras da grelha dispostas uma ao lado da outra, feito pela linha (A- -A); A fig, à, um co: rte de três barras da 6 grelha umas ao lado das outra •s, feito pela linha (B-B); A s fig. 5, 6 e 7 , respectivamente, vistas parciais da barra da grelha com diferentes formas de realização das saídas do ar. Á barra de grelha (1) representada nas fig. 1 a 7 apresenta as costas da barra (6), a parte superior da barra (3), a parte inferior da barra (9), a aba (4) provida das bordas laterais (8). A parte superior (3) da barra inclinada esta provida de varias cavidades (7) e das saliências (10) e (11). das uma ao 1 ado to 0 trajecto de ace inf erior das da barra, a aba .e cc >nduçao do ar (5) através das 2s superiores (3) (4) e as bordas laterais (8). O trajecto de conduç das barras. 3Briefly, the second embodiment of the grid bars acts towards the cooling of the grid back and a service without any interference. In a preferred embodiment of the present invention, the present invention provides a method of producing a flushing system for a garbage-burning plant in an advantageous manner. In the following, the invention is described in more detail, with reference to the desi in annex, cu; Fig. 1 is a partial side view of the grill bar; Fig. 2 is a line d, the bar of the blade is the line A-A; FIG. 3 is a cross-sectional view of two grid bars arranged alongside each other along line A-A; FIG. FIG. 3 is a cross-sectional view of three bars of the grid next to each other, taken along line B-B; FIG. Fig. 5, 6 and 7, respectively, partial views of the bar of the grid with different embodiments of the air outlets. The grate bar 1 shown in FIGS. 1 to 7 shows the backs of the bar 6, the upper part of the bar 3, the lower part of the bar 9, the flap 4 provided with the side edges 8. The upper portion (3) of the slant bar is provided with several recesses (7) and projections (10) and (11). (5) through the upper two (3) (4) and the side edges (8) of the upper side of the bar. The path of the bars. 3

Claims

Ia - Air-cooled grate support supported on transverse supports, in particular for feed grates in garbage-burning facilities, each pair of grate bars forming side by side a flow channel, which is bounded by the bottom of the bar 4a and its support flaps, and leaving the combustion chamber through troughs arranged in the upper part of the bar of the grid, the upper part of the bar of the grid being inclined to upwardly and downwardly and having from its edges several recesses disposed one on top of the other, and projections extending over the entire width or depth of the grate bar are provided therebetween, and therebetween by: a) the air outlets formed by two recesses (7) have a cross-section which widens in the direction of flow; b) the air outlets have an angle B between 5 ° and 60 ° with respect to the backs (6) of the grid bar, downwards in the direction of flow; c) the upper part (3) of the grate bar is inclined from top to bottom and rearwardly and presents from the side edges (8) one or more recesses (7) arranged on top of one another. Grille trim according to claim 1, characterized in that the widening of the cross section of the air outlets formed by two recesses (7) is produced by a multiple change in the angle of inclination of its surrounding walls. 4 The applicant claims a priori. of the German patent application filed on August 23, 1990, under Ne. P 40 26 587.0. Lisbon, August 22, 1991

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