SU865912A1

SU865912A1 - Hot blasting channel of blast furnace

Info

Publication number: SU865912A1
Application number: SU802897207A
Authority: SU
Inventors: Эмиль Михайлович Гольдфарб; Михаил Пинхусович Бродский; Леонид Петрович Грес; Альберт Николаевич Жариков; Виктор Николаевич Никифоров; Марк Герш-Берович Кутнер; Наум Нафтулович Подкантор; Валентин Васильевич Малый; Юрий Моисеевич Флейшман
Original assignee: Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт
Priority date: 1980-03-24
Filing date: 1980-03-24
Publication date: 1981-09-23

Description

Изобретение относится к металлургии, в частности к доменному производству, и может быть использовано во всех отраслях народного хозяйства, где требуется высокотемпературный нагрев газов.The invention relates to metallurgy, in particular to blast furnace production, and can be used in all sectors of the national economy where high-temperature heating of gases is required.

Известен тракт горячего дутья домен- 5 ной печи, содержащий блок воздухонагревателей, регенеративную насадку, установленную на участке прямого трубопровода перед кольцевым трубопроводом, представляющий собой металлический футерован- '0 ный кожух, в который заключена горизонтальная футерованная камера, заполненный огнеупорной·насадкой с ячейками малого диаметра t¹!·A well-known hot blast duct of a blast furnace 5 containing a block of air heaters, a regenerative nozzle installed in the straight pipe section in front of the annular pipeline, is a metal lined jacket containing a horizontal lined chamber filled with a refractory nozzle with small cells diameter t ¹ !

Недостатком известной конструкции ¹⁵является снижение эффективности нагрева дутья и выравнивания температур при работе с воздухонагревателями, имеющими различные конструктивные и теплотехнические характеристики. ²⁰ A disadvantage of the known design ¹⁵ is the decrease in the efficiency of heating the blast and temperature equalization when working with air heaters having various structural and thermal characteristics. ²⁰

Наиболее близким к предложенному по технической сущности и достигаемому эффекту является тракт горячего дутья до- менной печи, содержащий блок воздухонагревателей, регенеративную насадку, установленную на участке прямого трубопровода перед кольцевым трубопроводом.The closest to the effect proposed by the technical essence and effect is the hot blast path of the blast furnace containing a block of air heaters, a regenerative nozzle installed in the section of the direct pipeline in front of the ring pipeline.

Регенеративная насадка снабжена металлическим кожухом, в котором в камере из литых огнеупоров размещены динасовые элементы £2].The regenerative nozzle is equipped with a metal casing in which dinas elements of £ 2 are placed in a chamber of cast refractories.

Недостатком известной конструкции тракта горячего дутья является низкая эффективность нагрева дутья и выравнивания температур при работе с воздухонагревателями, имеющими различные теплотехнические характеристики. Часто в блоке работают воздухонагреватели с динасовой, муллитовой: и др. кладками с различными насадками (например, блочной и из прямого кирпича), что приводит к разному уровню температур дутья. В связи с этим необходимо использовать смеситель, в результате температура дутья снижается.A disadvantage of the known design of the hot blast duct is the low efficiency of heating the blast and temperature equalization when working with air heaters having various thermal characteristics. Often, air heaters with a dynamo, mullite: and other masonry work with different nozzles (for example, block and direct brick) work in a block, which leads to different levels of blast temperatures. In this regard, it is necessary to use a mixer, as a result, the temperature of the blast decreases.

Кроме того, работа известного устройства недостаточно эффективна из-заIn addition, the operation of the known device is not efficient enough due to

666912 отсутствия надежных температурных компенсаторов.666912 lack of reliable temperature compensators.

Цель изобретения - повышение эффективности нагрева дутья улучшением стабилизации его температуры.The purpose of the invention is to increase the efficiency of heating the blast by improving the stabilization of its temperature.

Поставленная цель достигается тем, что тракт горячего дутья, содержащий блок воздухонагревателей, регенеративную насадку, установленную на участке прямого трубопровода перед кольцевым трубопроводом, снабжен футерованным байпасным трубопроводом, в котором установлены регенеративные насадки, а на входе дутья в байпасный трубопровод и насадку установлены отсечные шиберы.This goal is achieved by the fact that the hot blast path, containing a block of air heaters, a regenerative nozzle installed in the section of the direct pipeline in front of the annular pipe, is equipped with a lined bypass pipe in which regenerative nozzles are installed, and shut-off gates are installed at the inlet of the blower to the bypass pipeline and nozzle.

Для устранения проседания металлический кожух регенеративной насадки прямого и байпасного трубопровода выполнен в виде овальной оболочки, в верхней части которой в зазоре между кожухом и огнеупорной футеровкой установлены направляющие стаканы с пружинами.To eliminate subsidence, the metal casing of the regenerative nozzle of the direct and bypass piping is made in the form of an oval shell, in the upper part of which in the gap between the casing and the refractory lining, guide glasses with springs are installed.

На фиг. 1 показан тракт горячего дутья, общий вид; на фиг. 2 — разрез А-А на фиг. 1.In FIG. 1 shows a hot blast duct, general view; in FIG. 2 is a section AA in FIG. 1.

Тракт горячего дутья состоит из блока 1 воздухонагревателей,соединенных прямым трубопроводом 2 с кольцевым трубопроводом 3 доменной печи 4. На участке прямого трубопровода 2 перед кольцевым трубопроводом 3 установлен стабилизатор 5 горячего дутья, состоящий из участка 6 прямого воздухопровода и байпаса 7. Внутри стабилизатора 5 установлены регенеративные насадки 8-10; стабилизатор снабжен отсечными шиберами 11-13.The hot blast duct consists of a block 1 of air heaters connected by a direct pipe 2 to the annular pipe 3 of the blast furnace 4. A hot blast stabilizer 5 is installed in the straight pipe 2 section in front of the ring pipe 3, consisting of a straight air pipe section 6 and bypass 7. Inside the stabilizer 5 are installed regenerative nozzles 8-10; the stabilizer is equipped with shut-off gates 11-13.

Металлический кожух стабилизатора 5 и байпасного, трубопровода 7 выполнен в виде овальной оболочки 14, в верхней части которой в зазоре между кожухом и огнеупорной футеровкой 15 радиально установлены направляющие стаканы 16 с пружинами 17.The metal casing of the stabilizer 5 and the bypass, pipe 7 is made in the form of an oval shell 14, in the upper part of which in the gap between the casing and the refractory lining 15 guide tubes 16 with springs 17 are radially mounted.

Тракт горячего дутья работает следующим образом.The hot blast duct works as follows.

Дутье при работе наиболее мощного врэдухонагревателя или двух воздухонагревателей, работающих в параллельном или смешанном режимах, проходит на трубопровода 2 горячего дутья в насадки 810. При этом шиберы 11-13 открыты. В первый период дутья избыточное тепло на копляемся в секциях стабилизатора температуры, а во второй период дутья тепло, аккумулированное насадкой, возвращается воздуху, благодаря чему достигается эф₅ фект стабилизации температуры дутья.The blast during operation of the most powerful air heater or two air heaters operating in parallel or mixed modes passes on the hot blast pipe 2 into nozzles 810. At the same time, the sliders 11-13 are open. In the first period the waste heat blast to koplyaemsya in temperature of the stabilizer sections, and the second period blast heat accumulated nozzle, returning air, thus achieving stabilization ef fect ₅ blast temperature.

При подключении менее мощных воздухонагревателей могут быть включены отдельные насадки 8-9-10, 9-10 или 8-10, для чего производят манипуляции Ю шиберами 11,12,13.When connecting less powerful air heaters, individual nozzles 8-9-10, 9-10 or 8-10 can be turned on, for which they are manipulated with gates 11,12,13.

При работе более мощных воздухонагревателей следует за счет манипуляции шиберов увеличивать массу насадки стабилизатора, а при работе менее мощных во₁₅ здухонагревателей - снижать ее.When working with more powerful air heaters, it is necessary to increase the mass of the stabilizer nozzle due to the manipulation of gates, and when working with less powerful air heaters in ₁₅ , reduce it.

Экономический эффект от внедрения предлагаемого изобретения за счет снижения удельного расхода кокса на одной доменной печи производительностью по₂θ рядка 1 млн. т. чугуна в год составит 228 000 руб. в год.The economic effect of the implementation of the invention by reducing the specific consumption of coke in one blast furnace with a capacity of ₂ θ of a row of 1 million tons of pig iron per year will amount to 228,000 rubles. in year.

Claims

(54) DOMAGNETIC HOT BREAST TRACT The invention relates to metallurgy, in particular to blast furnace production, and can be used in all parts of the national economy where high-temperature heating of gases is required. A well-known path of blast furnace hot blasting, containing a block of air heaters, a regenerative nozzle installed on a section of a straight pipe in front of the ring pipe, a metal lined casing enclosing a horizontal lined chamber filled with a small-diameter refractory hood with cells of small diameter l. A disadvantage of the known construction is a decrease in the efficiency of heating to blow and equalize the temperatures when working with air heaters, which have. MI various constructive and thermal characteristics. } {The closest to the proposed technical essence and the achieved effect is the hot blast path of the BATTERY furnace containing a heater block, a regenerative nozzle installed on the section of the direct pipeline in front of the circular pipeline. The regenerative nozzle is equipped with a metal casing in which the C2 silica elements are placed in a chamber of cast refractories. A disadvantage of the known design of a hot blowing path is the low heating efficiency of blowing and temperature equalization when working with air heaters with different thermal characteristics. Often, air heaters with dinas, mullite: and other masonry work with different nozzles (for example, block brick and straight brick) work in the block, which leads to a different temperature level to blow. In this connection, it is necessary to use a mixer, as a result of which the temperature of the blow is reduced. In addition, the operation of the known device is not sufficiently effective ie-aia the absence of reliable temperature compensators. The purpose of the invention is to increase the heating efficiency by improving the stabilization of its temperature. The goal is achieved by the fact that a hot blowing path containing a heater block, a regenerative nozzle installed on a section of a direct pipeline in front of a circular pipeline, is equipped with a lined bypass pipeline in which regenerative nozzles are installed, and at the inlet to blow into the bypass pipeline and nozzle installed shutoff valves. In order to eliminate subsidence, the metal casing of the regenerative cascade of the direct and bypass pipeline is ejected in the form of an oval shell, in the upper part of which, directional glasses with springs are installed in the gap between the casing and the refractory lining. FIG. 1 shows the path of the hot, blowing, general view; in fig. 2 shows section A-A in FIG. 1. The hot blow path consists of a unit 1 of air heaters connected by a straight pipe 2 to an annular pipe 3 of a blast furnace 4. On a straight pipe 2 in front of the ring pipe 3, a stabilizer 5 of hot blow is installed, consisting of section 6 a right my air outlet and bypass 7. Regenerative nozzles 8-10 are installed inside the stabilizer 5; The stabilizer is equipped with shut-off valves 11-13. The metal casing of the stabilizer 5 and the bypass pipeline 7 is made in the form of an oval casing 14, in the upper part of which in the gap between the casing and the refractory lining 15 there are radially installed guide cups 16 with springs 17. The path of hot blowing works as follows. During the operation of the most powerful air heater of two air heaters operating in parallel or mixed modes, the air blows through a pipe 2 of the city to blow into the 8 1O nozzles. While the gates 11-13 open. In the first period, excess heat is blown into the air in the sections of the temperature stabilizer, and in the second period the heat accumulated by the nozzle is returned to the air, thereby achieving the effect of temperature stabilization. When connecting less powerful air heaters, separate nozzles 8–9–10, 9–10 or 8–10 can be switched on, for which manipulations with gates 11,12,13 are performed. During the operation of more powerful air heaters, due to the manipulation of the gates, the weight of the stabilizer nozzle should be increased, and with less powerful air heaters, it should be reduced. The economic effect from the introduction of the proposed invention by reducing the specific consumption of coke on one blast furnace with a capacity of 1 million tons of pig iron per year will amount to 228,000 rubles. in year. Claim 1. A hot blast of a blast furnace containing a heater unit, a regenerative nozzle installed on a straight pipe section in front of a circular pipeline, characterized in that, in order to increase the efficiency of heating, blowing stability of its temperature before being fed into the blast furnace, the path of the hot air is supplied with an additional bypass pipeline, in which the regenerative nozzles are installed, and at the inlet, the blow to the bypass pipeline and each of the nozzles of the tract are installed s shutoff valves. 2. A path according to claim 1, characterized in that the metal casing of the regenerative nozzle of the direct and bypass pipelines is made in the form of an oval steel shell in section, in the upper part of which, in the gap between the casing and the refractory lining, springs are installed. Sources of information taken into account during the examination 1. US patent number 396393, cl. From 21 to 9/10, published. 1976.

2. The patent of Germany N 2622071, class. From 21 to 9/10, published. 1978

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