SU746163A1

SU746163A1 - Heat exchange apparatus for rotary furnace

Info

Publication number: SU746163A1
Application number: SU782573593A
Authority: SU
Inventors: Олег Юрьевич Якшаров; Людмила Сергеевна Бурлакова
Original assignee: Государственный Научно-Исследовательский Институт По Керамзиту
Priority date: 1978-01-25
Filing date: 1978-01-25
Publication date: 1980-07-07

Description

Изобретение относится к теплообменным устройствам, например, вращающихся печей для обжига сыпучих материалов.The invention relates to heat exchangers, for example, rotary kilns for firing bulk materials.

Известны ячейковые теплообменники с центральной шайбой с шарнирным соединением полок, с соединением полок компен- ⁵саторами, со свободным соединением полок из гибких изогнутых пластин с винтообразными лопастями и ячейковые теплообменники из огнеупорного кирпича £.1],Known metering exchangers with a central washer with swivel flanges, with a compound of shelves compensated Satoru ^5, with the free compound of shelves flexible curved plates with helical blades and Valium exchangers of refractory bricks £ .1],

Наиболее близким по технической сущ— ности и достигаемому эффекту к изобретению является теплообменное устройство вращающейся печи, содержащее расположенные на внутренней поверхности печи полые металлические теплообменные элементы, выполненные в виде пружин, размещенных по образующей печи, концевые витки которых жестко соединены с корпусом печи [2]. „ ' - 20The closest in technical essence and the achieved effect to the invention is a heat exchange device of a rotary kiln containing hollow metal heat exchange elements located on the inner surface of the kiln, made in the form of springs placed along the generatrix of the kiln, the end turns of which are rigidly connected to the kiln body [2] . " ' - 20

Недостаток известного устройства — малый срок службы теплообменника вследствие подверженности его деформациям и разрушениям от неравномерного распре2 деления температур по конструкции, а также невысокая эффективность процесса теплообмена между пружинами, поскольку слой подсушиваемого материала, находящийся в зоне пружины и вне ее зоны, имеет разные температуры нагрева.A disadvantage of the known device is the short service life of the heat exchanger due to its deformation and destruction from uneven distribution of temperatures according to the design, as well as the low efficiency of the heat exchange process between the springs, since the layer of dried material located in the spring area and outside its zone has different heating temperatures.

Целью изобретения является увеличе— ' ние долговечности устройства и улучшения теплообмена. , ₍ The aim of the invention is to increase the durability of the device and improve heat transfer. , ₍

Указанная цель достигается тем, что в теплообменном устройстве вращающейся печи, содержащем расположенные на внутренней поверхности печи полые металлические теплообменные элементы, последние выполнены в виде радиальных замкнутых решетчатых колен, соединенных друг с другом по длине печи металлическими стержнями и скрепленных с футеровкой посредством закладных деталей. Решетчатые кольца, при этом, выполнены из раэмешенных по периметру печи отдельных колец, соединенных между собой в местах контакта, или же решетчатые кольца выполнены из стержней,соединенных в местах контакта. 'This goal is achieved by the fact that in a heat exchange device of a rotary kiln containing hollow metal heat exchange elements located on the inner surface of the kiln, the latter are made in the form of radial closed latticed knees connected to each other along the length of the kiln by metal rods and fastened to the lining by means of embedded parts. The lattice rings, in this case, are made of individual rings located around the perimeter of the furnace, interconnected at the contact points, or the lattice rings are made of rods connected at the contact points. ''

Теплообменное устройство данной конструкции образует упругое самонесущее кольцо по периметру печи, пространственная целостность и упругость которого исключает необходим ость крепления его к корпусу печи, а для компенсации температурных напряжений и устранения проворачивания теплообменника, он. прикреплен только в отдельных местах к футеровке печи при помощи закладных деталей, например металлических стержней.A heat exchanger device of this design forms an elastic self-supporting ring around the perimeter of the furnace, the spatial integrity and elasticity of which eliminates the need to attach it to the furnace body, and to compensate for temperature stresses and eliminate the rotation of the heat exchanger, it. attached only in certain places to the furnace lining with embedded parts, such as metal rods.

Закладные детали одним концом жестко, например сваркой, соединены с элементами теплообменника» Высота теплообменни746163 , чению.’Высота теплообменного устройства превышает слой материала, в результате чего материал постепенно находится . внутри него и равномерно подсушивается.The embedded parts at one end are rigidly connected, for example by welding, to the elements of the heat exchanger. ”Heat exchanger height 746163, I read.” The height of the heat exchanger exceeds the layer of material, as a result of which the material is gradually located. inside it and evenly dried.

₅ За счет более полного наполнения пространства печи теплообменными элементами значительно увеличивается процесс тепло-_собмена между его элементами и подсушиваемым материалом. ₅ Due to a more complete filling of the furnace space with heat-exchange elements, the process of heat _- exchange between its elements and the dried material is significantly increased.

Использование теплообменного устройства -в промышленности строительных материалов приведет к повышению проиэводительности печи и его долговечности за счет исключения крепления теппооб15 менного устройства к корпусу печи и устранения напряжений от неравномерности ка превышает высоту слоя материала, в связи с чем последний равномерно подсушивается за счет лучшего теплообмена между элементами теплообменника и ма- 20 териапом. Предложенное теплообменное ^;устройство установлено в зоне сушки вращающейся печи.The use of a heat exchange device in the building materials industry will lead to an increase in the furnace productivity and its durability by eliminating the attachment of a heat exchange device to the furnace body and eliminating stresses from unevenness exceeding the height of the material layer, and therefore the latter is uniformly dried due to better heat exchange between the elements heat exchanger and material. The proposed heat transfer ^; the device is installed in the drying zone of a rotary kiln.

На фиг. 1 приведено теплообменное устройство, решетчатые кольца которого 25 выполнены в виде отдельных колеи; на фиг. 2 - теплообменное устройство выполнено из отдельных стержней; на фиг. 3 - вид А фиг. 1; на'фиг. 4 - вид Б фиг. 2.In FIG. 1 shows a heat exchange device, the lattice rings of which 25 are made in the form of separate ruts; in FIG. 2 - heat transfer device made of individual rods; in FIG. 3 is a view A of FIG. 1; na'fig. 4 is a view B of FIG. 2.

Элементы теплообменного устройства 30 выполнены, например, из отдельных колец 1 или отдельных стержней 2 жаростойкой стали толщиной 5-30 мм, взаимосвязанных между собой в местах контакта 3, а каждый ряд колец вдоль образующей печи 35 объединён друг с другом, например, сваркой металлическими стержнями 4. Элементы теплообменника сваривают с таким расчетом, чтобы расстояние между ними обеспечивало свободное прохождение наи- 40 более крупных гранулированных материалов, а высота теплообменного устройства должна превышать высоту слоя материала.The elements of the heat exchange device 30 are made, for example, of individual rings 1 or individual rods 2 of heat-resistant steel 5-30 mm thick, interconnected at points of contact 3, and each row of rings along the forming furnace 35 is combined with each other, for example, by welding with metal rods 4. The heat exchanger elements are welded in such a way that the distance between them ensures the free passage of the largest granular materials, and the height of the heat exchanger must exceed the height of the material layer.

В футеровку 5 печи теплообменное устройство прикреплено в отдельных местах 45 с помощью закладных деталей 6 к которым, например сваркой, жестко закреплено теплообменное устройство.In the lining 5 of the furnace, the heat exchanger is attached in separate places 45 by means of embedded parts 6 to which, for example, by welding, the heat exchanger is rigidly fixed.

Работает теплообменное устройство следующим образом. 50The heat exchange device operates as follows. fifty

Материал, подходя к зоне сушки поступает в теплообменное устройство, равномерно распределяется по всему его се разпределения температур в его элементах.The material, approaching the drying zone, enters the heat exchanger, is evenly distributed throughout its entire distribution of temperatures in its elements.

Claims

The invention relates to heat exchange devices, for example, rotary kilns for firing bulk materials. Known cell heat exchangers with a central washer with a swivel butt, with a joint shelf compensators, with a free connection shelves of flexible curved plates with helical blades and cell heat exchangers of refractory brick Ll3. The closest in technical essence and effect achieved to the invention is a heat-exchange device of a rotary kiln containing hollow metal heat-exchange elements arranged on the inner surface of the kiln, made in the form of springs placed along the generator of the kiln, the end turns of which are rigidly connected to the body of the kiln 12, The disadvantage of the known device is the short service life of the heat exchanger due to its susceptibility to deformation and destruction from the uneven distribution of temperature throughout the structure, also low efficiency of heat transfer between the springs as the layer dries the material located in the spring zone and outside the zone, the heating temperature is carved. The aim of the invention is to increase the durability of the device and improve heat transfer. I. This goal is achieved by the fact that in a heat-exchanging device of a rotary kiln containing hollow metal heat exchange elements located on the inner surface of the kiln, the latter are made in the form of radial closed lattice rings connected to each other along the kiln by metallic steri and fastened with lining by means of fixed parts . Grid rings, in this case, are made of individual rings placed around the furnace perimeter, interconnected at their contact points, or cage rings made of crefJkHeft, connected at the contact points. The heat exchanging device of this structure forms an elastic self-supporting ring around the furnace perimeter, the spatial integrity and elasticity of which eliminates the need to attach it to the furnace body, and to compensate for thermal stresses and eliminate the heat exchanger / it turning. it is attached only in separate places to the furnace lining with fixed parts, for example, metal rods. Embedded parts with one end of a rigid, for example, welding, connected to the element - 15 heat exchanger. The height of the heat exchanger exceeds the height of the layer of material, and therefore the latter is uniformly dried due to better heat exchange — between the elements of the heat exchanger and the material. The proposed heat exchanging device is installed in the drying zone of the rotary kiln. FIG. 1 shows a heat exchanger device, the lattice rings of which are made as individual gauges; in fig. 2 - the heat exchange device is made of separate rods; in fig. 3 is a view A of FIG. one; on. FIG. 4 is a view of FIG. 2. The elements of the heat exchanging device are made, for example, of individual rings 1 or separate rods 2 of heat-resistant steel 5-30 mm thick, interconnected at the contact points 3, and each row of rings along the forming furnace is united with each other, for example, by welding metal rods 4. The heat exchanger elements are welded in such a way that the distance between them ensures the free passage of the largest granular materials, and the height of the heat exchanger must exceed the height of the material layer. In the furnace lining 5, the heat exchanging device is attached in separate places with the help of embedded parts to which, for example by welding, a heat exchanging device is rigidly fixed. The heat exchanger operates as follows. . The material approaching the sugika zone enters the heat exchange device, is evenly distributed throughout its entire section. The height of the heat exchanging device exceeds the material layer, as a result of which the material is gradually inside it and is dried evenly. Due to more complete filling of the furnace space with heat exchange elements The heat-exchange process between its elements and dryers significantly increases. material. The use of heat exchangers in the construction industry: materials will increase the efficiency and durability of the furnace by eliminating the attachment of the heat exchanging device to the furnace body and eliminating stresses from uneven temperature distribution in its elements. Claim 1. Heat exchanger device of a rotary kiln containing hollow metal heat exchange elements located on the inner surface of the furnace, characterized in that, in order to increase the durability of the device and improve heat exchange, the heat exchange elements are made in the form of radial cones of closed lattice rings connected to each other the length of the furnace with metal rods and fastened to the lining by means of embedded parts. 2. Heat transfer device according to claim 1, characterized in that the lattice rings are made of individual rings arranged around the furnace perimeter and interconnected at the contact points. 3. Heat exchanging device according to claim 1, characterized in that the lattice rings are made of rods matched at the points of contact. Sources of information taken into account during the examination .1. Vorobyov Kh. S., Mazurov D. Ya. Ten-technical calculations of cement kilns and apparatuses. M., 1962, p. 22

2. USSR author's certificate No. 504064, cl. F 27 В 7/18, 1974 (prototype).

Bu

0US.3

4eies

/ a

r3