SU935690A1

SU935690A1 - Rotary kiln chain curtain

Info

Publication number: SU935690A1
Application number: SU802990262A
Authority: SU
Inventors: Виталий Алексеевич Чурюмов
Original assignee: За витель
Priority date: 1980-10-08
Filing date: 1980-10-08
Publication date: 1982-06-15

Description

1one

. Изобоетеиие относитс к технике теплообмена во вращающихс печах и может быть,использовано в промышленности строительных материалов.. Isoboueia refers to the technique of heat transfer in rotary kilns and can be used in the building materials industry.

Известна цепна завеса вращающейс печи, содержаща прикрепленные к внутренней поверхности корпуса печи за оба конца р ды цепец 11.A chain curtain of a rotary kiln is known, comprising a chain 11 attached to the inner surface of the kiln body at both ends of the rows.

В такой цепной завесе цбпи равномерно перекрывают все сечение печи и при ее вращении то опускаютс концами в материал (шлам), то поднимаютс в . поток гор чих газов, что обеспечивает теплообмен между гор чими газами и материалом.In such a chain curtain, the tsbi evenly overlaps the entire cross section of the furnace and, when it rotates, it is lowered with its ends into the material (sludge) and then rises. a stream of hot gases that provides heat exchange between the hot gases and the material.

Недостатком данной цепной завесы вл етс ее низка эффективность из за замазывани (залипани ) звеньев цепи материалом, что сильно увеличивает гидравлическое сопротивление прохождению газов, а также ухудшает теплообмен, так как теплообмен между материалом и налипшим на цепи шламом хуже, чем между металлическими звень ми цепи и материалом.The disadvantage of this chain curtain is its low efficiency due to the smearing (sticking) of chain links with material, which greatly increases the flow resistance of gases and also impairs heat transfer, since heat transfer between the material and the sludge adhering to the chains is worse than between metal chain links. and material.

Целью изобретени вл етс повышение эффективности теплообмена. , Указанна цель достигаетс тем, что цепна завеса вращающейс печи, содержаща прикрепленные к внутренней поверхности корпуса печи за оба конца р ды цепей, снабжена замкнутымиThe aim of the invention is to increase the heat exchange efficiency. This goal is achieved by the fact that the chain-curtain of the rotary kiln, containing attached to the inner surface of the kiln body for both ends of the rows of chains, is provided with closed

,Q элементами свободно охватывающими каждую цепь. При этом замкнутые элементы могут быть выполнены из цепей или в виде полых цилиндров. Кроме того, цепна завеса снабжена ограи ничител ми перемещени замкнутых элементов , установленных на цеп х, а oi- раничители выполнены в виде конусов . Цепна завеса снабжена подпорными кольцами, установленными с обоих, Q elements freely spanning each chain. In this case, the closed elements can be made of chains or in the form of hollow cylinders. In addition, the chain-curtain is provided with travel limiters for the movement of closed elements mounted on chains, and oi-limiters are made in the form of cones. The chain curtain is equipped with retaining rings installed from both

20 сторон от р дов цепей.20 sides of rows of chains.

Claims

In such a chain curtain, when the furnace rotates, the closed elements clean the chains as they move through the latter, and in addition, the hollow elements together with the limiters pick up the sludge below and then pour it onto the chains. FIG. 1 schematically shows the furnace at the site of the chain curtain installation, longitudinal section J in figure 2 is the same cross section. The inside and the furnace are 1 row and both chains are hung at both ends.

2. Each chain 2 is enclosed in free-standing closed elements that can be made of chains 3 or hollow cylinders, and both chains 3 and cylinders A can be worn on each chain. The inside diameter of cylinders k or closed chains 3 is 10-50% more than the maximum size of the links of chains 2 to ensure free movement along the latter. The length of the cylinders 14 is determined by a layer of material; it must be less than the last by 10-501 Limits 5 are installed on chains x 2, which can be made in the form of cones. The maximum diameter of the limiter 5 takes at least the inner diameter of the cylinder. Limiters 5 on chains x 2 are located close to the furnace body 1 with the condition of ensuring the free rotation of the chain 2 around the suspension point. On both sides of the rows of chains 2; In order to increase the sludge layer, retaining rings 6 are installed, the height of which is determined by the required increase in the sludge layer while ensuring acceptable hydraulic resistance to the passage of gases. The chain curtain works as follows. When the furnace 1 rotates, the closed chains 3 or hollow cylinders under the action of weight move along the chains 2 and clean the latter. In the presence of hollow cylinders and cones 5 in a lower position, when cylinders k are mounted on cone 5, containers are formed into which sludge is poured and which, with further rotation, rises and pours onto the chain, wetting them, which contributes to better dust collection and heat with dusty hot gases. Installation on each chain of chains 3 and cylinders k provides sludge lifting and cleaning of chains 2, since chains 3 better clean chains 2 than cylinders. The presence of retaining rings 6 increases the layer of sludge, and, consequently, it is possible to make cylinders k higher and raise the sludge more into the stream of gases. The use of the proposed chain curtain increases the efficiency of the heat exchange, since the chains 2 are constantly cleaned and further wetted with sludge, which leads to savings in fuel and raw materials due to better heat exchange and a decrease in dust loss. Claim 1. Chained curtain of rotary kiln containing attached to the inner surface of the kiln body for both ends of the chains, characterized in that, in order to increase the efficiency of heat exchange, it is equipped with closed elements that freely surround each chain. 2, The veil of pop. 1, I distinguish that with the fact that the closed elements are made of chains.

3. Curtain according to claim 1, about tl and h a - y shch and the fact that the closed elements are made in the form of hollow cylinders. . Veil on PP. 1.3 t and l so that it is provided with limiters for the movement of closed elements mounted on chains. 5. The curtain according to claims 1.1, and that is limited to the fact that the stops are made in the form of cones. 6. Curtain according to claims 1-5 of tl and h and y. This is due to the fact that it is equipped with retaining rings installed on both sides of the rows of chains. Sources of information taken into account in the examination 1, USSR Author's Certificate No., cl. F 27 B 7/18, 1979 (prototype).