SU840124A1

SU840124A1 - Packing device of blast furnace air heater

Info

Publication number: SU840124A1
Application number: SU792764467A
Authority: SU
Inventors: Валентин Александрович Александров; Александр Дмитриевич Ткаченко; Альберт Николаевич Жариков; Александр Яковлевич Зусмановский; Игорь Александрович Прокофьев; Яков Прокофьевич Калугин; Николай Васильевич Питак; Александр Владимирович Могилев
Original assignee: Украинский Государственный Институтпо Проектированию Металлургических Заводов
Priority date: 1979-02-16
Filing date: 1979-02-16
Publication date: 1981-06-23

Description

1one

Изобретение относитс к черной металлургии, в частности к конструкци м воздухонагревателей доменных печей , и можех быть использовано в других отрасл х народного хоз йства в аппаргатах высокотемпературного нагрева воздуха и газов.The invention relates to ferrous metallurgy, in particular, to designs of air heaters for blast furnaces, and can be used in other branches of the national economy in the high-temperature heating apparatus for air and gases.

Одним из путей повышени стойкости поднасадочного устройства и соответственно роста температуры гор чего дуть может быть вьшолнение его из огнеупорных материалов.One of the ways to increase the durability of the subunit device and, accordingly, the rise in temperature of a hot blow can be made from refractory materials.

, Наиболее близким по технической сущности и достигаемому положительному эффекту вл етс кирпичное поднасадочное устройство, состо щее из р да кирпичных столбов, опирающихс на выкладку днища воздухонагревател . Столбы соединены сводами, на которые уложена поднасадочна решетка, несуща кладку насадки 1.The closest in technical essence and the achieved positive effect is a brick sub-nozzle consisting of a row of brick pillars supported by the layout of the bottom of the air heater. The pillars are connected by arches, on which a subnasper grating is laid, carrying the laying of the nozzle 1.

Однако така конструкци поднасадочного устройства увеличивает высоту воздухонагревател , а также, облада невысокой строительной прочностью, уменьшает высоту насадки и поверхность нагрева.However, such a design of the sub-nozzle increases the height of the air heater, and also, has low building strength, reduces the height of the nozzle and the heating surface.

Цель изобретени - повьшение эффективности работы воздухонагревател путем увеличени температуры гор че- . го дуть и поверхности насадки.The purpose of the invention is to increase the efficiency of the air heater by increasing the temperature of hot mountains. blown and the surface of the nozzle.

Поставленна цель достигаетс тем, что поднасадочное устройство, содержащее штуцер холодного дуть , дымовые клапаны, по всей высоте вьтолнено в виде трех концентрических по сов насадки с вертикальными н гризонтальными каналами, при зтом суммарна площадь горизонтальных каналов каждого по са в любом сечении составл ет соответственно -4,0-2,0; 3,0-1,0; 2,00 ,25 значени максимальной площади вертикальных каналов,The goal is achieved by the fact that a sub-nozzle device containing a cold-blowing choke, smoke valves is completed in the form of three concentric nozzles with vertical horizontal channels, with the total area of the horizontal channels of each section in any section being respectively 4.0-2.0; 3.0-1.0; 2.00, 25 values of the maximum area of vertical channels,

Claims

Fig. 1 shows an air heater with a remote combustion chamber and the proposed sub-nozzle device, general view; Fig. 2 shows an air heater with an integrated combustion chamber and the proposed sub-suction device; on fig.Z - section aa in figure 1; figure 4 - section bb in figure 2; figure 5 - node laying pre-assembly device. The sub-packing device consists of packed bricks with horizontal holes 2 for blowing flow and gases between the vertical channels 3 formed during the laying process. Between the masonry and the casing 4 there is an annular gap 5 connected to the cold blown fittings 6 and the smoke valves 7. The device is bitwise from the periphery to the center three times a, b, b of equal width, and the total area of the horizontal holes 2 of each in any section of the sub-setter, respectively, 4.0-2.0; 3.01, 0; 2.0-0.25. The values of the maximum total area of the vertical channels 3. The specified limits are selected on the basis of ensuring uniform distribution of blowing and gases across the cross section of the sub-attachment device with a total area of horizontal holes 2 in the center and less than 4.0 values of the maximum total The area of the vertical channels 3 is observed mainly in the peripheral distribution, which is determined by the increased dynamic resistance of this pressure and large pressure losses in it. When the total area of horizontal holes 2 in CET is more than 0.25, the maximum total area of vertical channels 3 is more active, the central zone, also affects the distribution of blowing over the nozzle section, and the temperature of hot blowing. The device works as follows. When the heater is operating in heating mode, hot gases, through the nozzle, heat it up. From the nozzle with a temperature of 800-900-C and more, they get into the sub-nozzle device, in which the laying of refractory bricks is heated 1. Under the action of a vacuum created by 244 covered valves 7, the horizontal flow of exhaust gases is carried out over the section of the sub-attachment and the latter, getting into the annular gap 5, is sucked out of the nozzle chamber into the smoke hogs with a temperature of BOO-TOO C and more, where their heat can be utilized. When the air heater is operating in the blowing mode, cold air is supplied to the annular gap 5 through the cold blowing nozzle 6, is evenly distributed around the circumference and cross section of the sub nozzle due to horizontal flow, is preheated and enters the nozzle where it is heated further. The proposed technical solution makes it possible to increase the temperature of the hot blast, reduce the height of the air heater, increase the heating temperature, reduce the metal consumption and the installation time of the subassembly device, and reduce capital expenditures for the construction of the air heater. The invention includes a sub-nozzle of a blast furnace air heater containing a cold-blowing choke, smoke valves, characterized in that, in order to increase the nozzle surface and increase the blowing temperature, the sub-nozzle is made in the form of three concentric nozzles with vertical and horizontal channels, while the total area of the horizontal channels of each sa along any section is 4.0-2.0; 3.0-1.0; 2.0-0.25 value of the maximum total area of vertical channels. Sources of information taken into account in the examination .1. Novospassky A.F. The designs of blast furnaces and the device shops. .GONTI, 1938, part 2, pp.147-148, ris.180.