SU726171A1

SU726171A1 - Blast furnace air heater with external combustion chamber

Info

Publication number: SU726171A1
Application number: SU762336770A
Authority: SU
Inventors: Владимир Трофимович Васильченко; Захар Яковлевич Зорин; Евгений Петрович Лукьяненко; Александр Ефимович Любин; Владилен Федосеевич Сафронков
Original assignee: Государственный Проектный Институт "Днепрпроектстальконструкция"
Priority date: 1976-03-22
Filing date: 1976-03-22
Publication date: 1980-04-05

Description

Изобретение относится к черной металлургии, в частности к устройству воздухонагревателя доменной печи с вынесенной камерой горения.The invention relates to ferrous metallurgy, in particular to a device for a blast furnace air heater with a remote combustion chamber.

Известен воздухонагреватель с вынесенной камерой горения, содержащий ко— ⁵жух, насадку и общий купол над* камерами горения и насадки, установленный на коробчатой балке, и имеющий соеди— , нительный канал между камерами, ниж-. няя поверхность которого представляет собой горизонтальную плоскость |xj.A well-known air heater with a remote combustion chamber containing co- ⁵ casing, a nozzle and a common dome above * combustion chambers and nozzles mounted on a box-shaped beam, and having a connecting channel between the chambers, bottom. whose luminous surface is the horizontal plane | xj.

В условиях значительных силовых воздействий на конструкции купола и соединительного канала от высокого давления ₎₅дутья и температурного распора футеровки для обеспечения достаточной несущей способности нижней плоской поверхности канала требуется создание сложной и. мощной балочной клетки либо применение листов толщиной боцее 200 мм.,Under conditions of significant force impacts on the construction of the dome and the connecting channel from high pressure _{) 5 of the} blast and the temperature spread of the lining to create sufficient bearing capacity of the lower flat surface of the channel, it is necessary to create a complex and. powerful beam cage or the use of sheets with a thickness of more than 200 mm.,

Создание балочной клетки усложняет конструкцию, увеличивает трудоемкость ее изготовления и, как показал опыт, приводит к значительному снижению стойкости в связи с наличием большого количества концентратов напряжений на элементах конструкции (кожухе), работающих в условиях малоцикловой усталости.Creating a beam cell complicates the design, increases the complexity of its manufacture and, as experience has shown, leads to a significant decrease in resistance due to the presence of a large number of stress concentrates on structural elements (casing) operating in low-cycle fatigue conditions.

Целью изобретения является повышение стойкости кожуха и упрощение его ко нет— рукции.The aim of the invention is to increase the resistance of the casing and simplifying its co-construction.

Указанная цель достигается тем, что в известном воздухонагревателе кожух соединительного канала между камерами горения и насадки выполнен в виде поверхности^ образованной частями двух цилиндров одинакового радиуса, соединен-», ных по оси камер, при этом образующие этих.частей цилиндров параллельны примыкающим к ним коробчатым балкам.This goal is achieved by the fact that in the known air heater the casing of the connecting channel between the combustion chambers and the nozzle is made in the form of a surface formed by parts of two cylinders of the same radius, connected along the axis of the chambers, while forming these parts of the cylinders are parallel to the box-shaped adjacent to them beams.

На фиг. 1 изображен вертикальный разрез воздухонагревателя; на фиг. 2 — вид А фиг. 1; на фиг. 3 - поперечный разрез Б—Б купола с соединительным каналом.In FIG. 1 shows a vertical section through an air heater; in FIG. 2 is a view A of FIG. 1; in FIG. 3 - cross section B — B of the dome with a connecting channel.

to β воздухонагревателе камера 1 насадки И камера 2 горения соединены общим куполом 3, установленным на ко;Л)б— чатые балки 4. Камеры насадки и горения сопряжены между собой соединительным каналом 5. Соединительный канал 5 между камерами насадки и горения выполнен из двух частей 6 и 7, Вырезанных из цилиндров одинакового радиуса. Части 6 и 7 цилиндров соединены по оси 8 камер и с коробчатыми балками 4. Образующие частей 6 и 7 цилиндров параллельны примыкающим к ним коробчатым балкам. Цилиндрическая поверхность кожуха соединительного канала приводит к увеличению его стойкости, позволяет повышать давление и температуру дутья, подаваемого в печи.to β of the air heater, the nozzle chamber 1 and the combustion chamber 2 are connected by a common dome 3 mounted on the joint; L) the beams 4. The nozzle and combustion chambers are interconnected by a connecting channel 5. The connecting channel 5 between the nozzle and combustion chambers is made of two parts 6 and 7, Cut from cylinders of the same radius. Parts 6 and 7 of the cylinders are connected along the axis 8 of the chambers and with the box-shaped beams 4. The forming parts of the 6 and 7 cylinders are parallel to the box-shaped beams adjacent to them. The cylindrical surface of the casing of the connecting channel leads to an increase in its resistance, allows to increase the pressure and temperature of the blast supplied in the furnace.

Такай цилиндрическая поверхность позволяет иметь минимальное количество типов кирпичей, что дает возможность получения их нужной формы прямо' с завода. Практически полностью исключается теска и ручная обработка кирпичей, чем обеспечивается точная подгонка огнеупоров друг к другу и надежное заполнение швов между ними. Такая тщательно выполненная футеровка представляет собой надежную термическую защиту металлоконструкций, исключающую проникновение горячих газов через швы и неплотности. Металлический кожух эксплуатируется в условиях постоянного равномерного поля. Футеровка при этом ' ¹ разогревается равномерно только по внутренней поверхности без доступа тепла ·» ·;Such a cylindrical surface allows you to have a minimum number of types of bricks, which makes it possible to obtain their desired shape directly from the factory. Almost completely eliminated teska and manual processing of bricks, which ensures accurate fitting of refractories to each other and reliable filling of the joints between them. Such a carefully executed lining is a reliable thermal protection of metal structures, eliminating the penetration of hot gases through seams and leaks. The metal casing is operated in a constant uniform field. The lining at the same time ' ^{1 is} heated evenly only on the inner surface without access to heat · "·;

в местах неплотных швов, чем обеспечивается равномерный перегрев ее по всей толщине кладки. При таком положении исключается появление местных прогревов как в футеровке , так и в металличес— . ком кожухе, чем достигается увеличение надежности и долговечности всей конструкции, а также возможность эксплуатации воздухом нагревателя при высокой температуре дутья на всем протяжении его эксплуатации.in places of loose joints, which ensures uniform overheating of it over the entire thickness of the masonry. In this situation, the appearance of local heating both in the lining and in the metal is excluded. to the casing, thereby achieving an increase in the reliability and durability of the entire structure, as well as the possibility of using the heater with air at a high blast temperature throughout its operation.

Claims

The invention relates to ferrous metallurgy, in particular to the device air of a blast furnace heater with a remote combustion chamber. A stove with a derived combustion chamber containing a housing, a nozzle and a dome above the combustion and nozzle chambers mounted on a gilded beam and having a connecting channel between the chambers, the bottom surface of which is a horizontal plane jl, is known. In conditions of significant power effects on the structures of the dome and the connecting channel from high pressure to blow and the temperature spread of the lining, to create a sufficient bearing method for the bottom flat surface of the channel, it is required to create complex and. powerful beam cell or the use of sheets with a thickness of more than 200 mm. Creating a beam cell complicates the design, increases the complexity of its manufacture and, as a tyukazyl experience. leads to a significant decrease in resistance due to the presence of a large number of stress concentrates on structural elements (casing) operating in conditions of low-cycle fatigue. The aim of the invention is to increase the durability of the casing and simplify its design. instructions. This goal is achieved by the fact that, in a known air heater, the casing of the connecting channel between the combustion chambers and the nozzle is made in the form of a surface formed by parts of two cylinders of the same radius connected along the axis of the chambers, while forming these / cylinder parts parallel to the box beams adjacent to them. FIG. 1 shows a vertical section of the stove; in fig. 2 - view A of FIG. one; Fig. 3 shows a transverse section B of the dome with a connecting channel. The air heater chamber 1 of the nozzle and the combustion chamber 2 are unified by the main dome 3 mounted on the ram beam 4. The nozzle and combustion chambers are interconnected by the connecting channel 5. Connecting The channel 5 between the nozzle and combustion chambers is made of two parts 6 and 7, cut from cylinders of the same radius. Parts 6 and 7 of the cylinders are connected along the axis of 8 chambers and with box-shaped beams 4 Formation of parts 6 and 7 of the cylinders are parallel to the adjacent box-shaped nozzles. The cylindrical surface of the casing of the connecting channel leads to an increase in its durability, allows the pressure and temperature to be blown into the furnace to be increased. Such a cylindrical surface allows you to have a number of types of bricks, which makes it possible to draw them into the desired shape directly from the factory. The brickworking and the manual processing of bricks are almost completely eliminated, which ensures an accurate fit of the refractories to each other and reliable filling of the joints between them. Such a thorough lining provides reliable thermal protection of metal structures, eliminating hot gases through seams and leaks. The metal skin is eXpuppuated under conditions of a constant uniform floor. At the same time, the lining is uniformly only along the inside of the surface without heat in places of loose shh) B, which ensures its uniform overheating throughout the entire thickness of the masonry. In this position, the occurrence of local warm-ups in the lining and in the metal casing is eliminated, thus increasing the reliability and durability of the whole structure, as well as the possibility of using the heater air at high temperature to blow throughout its operation. The invention of an air heater of a blast furnace with a remote combustion chamber, comprising a casing, a nozzle, a common dome above the combustion chambers and nozzles, mounted on a box girder, and a connecting channel between the chambers, characterized in that, in order to increase the resistance of the casing, as well as simplifying the construction, the casing of the connecting channel between the chambers is made in the form of a surface formed by parts of two cylinders of the same radius, connections along the axis of the chambers, while forming these cylinder parts parallel to ayuschim them box girder. Sources of information taken into account during the examination 1. Drawing Gipromez Ng 14822018, 1973.