SU922151A1

SU922151A1 - Nozzle of blast furnace tuyere apparatus

Info

Publication number: SU922151A1
Application number: SU802965488A
Authority: SU
Inventors: Николай Иванович Бей; Борис Григорьевич Микрюков; Анатолий Зиновьевич Грищенко; Юрий ВАсильевич Федулов; Геннадий Петрович Лежнев; Юрий Викторович Яковлев
Original assignee: Киевский институт автоматики им.ХХУ съезда КПСС
Priority date: 1980-08-04
Filing date: 1980-08-04
Publication date: 1982-04-23

Description

(5) ФУРМА ДОМЕННОЙ ПЕЧИ(5) FURMA DOMAIN FURNACE

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Изобретение относитс к черной металлургии , в частности к оборудованию доменных Немей.FIELD OF THE INVENTION The invention relates to ferrous metallurgy, in particular, to the equipment of domain Nemey.

Известна фурма доменной печи, содержаща охлаждаемый корпус с внутренней поперечной стенкой, образующей в торце кольцевую камеру, фланец и патрубки дл подвода и отвода хладагента . С целью повышени ее. наде кности она снабжена расположенными ; внутри корпуса трубчатым конденсатором , состо щим из двух коллекторов, соединенных между собой полукольцами стенку корпуса, и камерой в верхней и нижней ее части II.A known blast furnace tuyere containing a cooled body with an internal transverse wall, forming an annular chamber at the end, a flange and nozzles for supplying and discharging the refrigerant. In order to increase it. hope it is equipped; inside the casing there is a tubular condenser consisting of two collectors interconnected by half-rings of the casing wall and a chamber in its upper and lower part II.

Недостатком данной фурмы вл етс сложность ее изготовлени .The disadvantage of this tuyere is the complexity of its manufacture.

Известна дутьева фурма доменной печи, содержаща корпус, состо щий из наружного и внутреннего конусов, соединенных фланцем, патрубки подвода и отвода воды и конденсатор, корпус фурмы выполнен в виде тепловой трубы с наклоном верхней образующей наружнего конуса 15-30°, причем конденсатор тепловой трубы вынесен за пределы корпуса и соединен с ним трубопроводом , а с целью уменьшени габаритов конденсатора, он выполнен в виде сильфона 2 .The known blast furnace blast furnace, comprising a housing consisting of outer and inner cones connected by a flange, water inlet and outlet connections and a condenser, the tuyere housing is made in the form of a heat pipe with an inclination of the upper cone forming an outer cone 15-30 °, and the heat pipe condenser taken out of the case and connected to it by a pipeline, and in order to reduce the size of the capacitor, it is made in the form of a bellows 2.

Недостатком этой фурмы вл етс ее громоздкость, вызванна выносным конденсатором, что затрудн ет установку ее и услови обслуживани . Кро10 ме того, така фурма требует дополнительных затрат на ее изготовление.The disadvantage of this tuyere is its cumbersome, caused by a remote condenser, which makes it difficult to install and service conditions. In addition, such a lance requires additional costs for its manufacture.

Наиболее близкой к предлагаемой по технической сущности и достигае15 мым результатам вл етс фурма доменной печи, содержаща охлаждаемый корпус с фурменной полостью, фланец, патрубки дл подвода и отвода охладител и трубчатый змеевик, разме20 щенный в полости корпуса Closest to the proposed technical essence and achievable results is a blast furnace tuyere containing a cooled body with a tuyere cavity, a flange, branch pipes for the supply and removal of a cooler and a tubular coil located in the body cavity

Claims

The disadvantages of the known tuyere are the manufacturing difficulty and low durability. The aim of the invention is to simplify the design, improve its maintenance, increase durability and prevent water from entering the kiln. This goal is achieved by the fact that in a blast furnace tuyere containing a cooled housing with a tuyere cavity, made in the form of a two-phase thermosyphon, a flange, pipes for supplying and discharging refrigerant and a tubular coil, the cross-sectional area of the coil is made 0,60, 7 of the cross-sectional area of the cavity . The sectional area of the tubular coil, which is 0.6-0.7 of the tuyere section, is selected experimentally and is determined on the basis of the following conditions: unimpeded removal of the bubbles and supply of the heat-transfer fluid between the walls of the tuyere cavity and the tubular coil ; the location of the liquid level in the thermosyphon to the chord of the segment with the arc 200-2 0 °; ensuring unhindered movement of the gaseous coolant above the liquid level. . Failure to comply with the lower limit of not less than 0, 6 leads to uneven cooling of the tuyere body with a heat-transfer fluid, since its volume is constant and accounts for 33% of the volume of the furman variable cavity. In this case, the tubular coil is not sufficient. It will displace the heat-transfer fluid upwards and it will not wash the surface with a different volume of 200-2 0 °. Failure to comply with the upper limit of the bob, 7, leads to difficulty in removing the bubbles and supplying the heat-transfer fluid between the walls of the tuyere cavity and the tubular coil and, as a consequence, to the rapid removal of the tuyere from the wall. The drawing shows the proposed tuyere, in section. The lance includes a housing 1, made in the form of a two-phase thermosyphon. inside of which is placed a tubular coil 2, which is in contact with the inner surface of its generators and connected to the pipes 3 and 4 of the supply and discharge of water and the flange 5 Under the action of the heat flow of the furnace, the heat transfer fluid in the cavity of the thermosyphon evaporates. Formed from the steam pipe to the mixture settles on the walls of the tubular coil 2, cools and re-enters the lower part of the thermosyphon. The cooling of the steam-and-water mixture is produced by the flow of heat-transfer fluid supplied through the nozzle 3 to supply the tubular coil 2 and discharge the fluid through the nozzle . At damage of the case of 1 thermosyphon a small amount of steam enters the space of the furnace. The proposed design of a blast furnace tuyere makes it possible to increase the reliability of operation, prevent water from entering the furnace, reduce downtime in the furnace for replacing tuyeres, and improve the conditions for its maintenance. Claims. A lance of a blast furnace containing a cooled body with a lance in the form of a two-phase thermosyphon, lane, pipes for supplying and discharging refrigerant and a tubular coil, which is designed to simplify the tuyere and increase resistance, the cross section area of the coil is 0 , 6-0.7 pload cross section of the cavity. Sources of information, rintye taken into account in the examination 1. The author's certificate of the USSR 619516, cl. B 21 B 7/16, 1975.

2. USSR author's certificate f, cl. B 21 B 7/16, 1976.

3. The patent of England No. 1399977, l. P kB, pub. 1978

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