SU723347A1

SU723347A1 - Box-type water cooled crown

Info

Publication number: SU723347A1
Application number: SU782670172A
Authority: SU
Inventors: Александр Григорьевич Швачка; Борис Федорович Кожекин; Николай Григорьевич Калин; Владимир Константинович Кострыкин
Priority date: 1978-10-09
Filing date: 1978-10-09
Publication date: 1980-03-25

Description

Изобретение относится к оборудованию печей для плавки металлов и сплавов, а именно к сталеплавильным печам.The invention relates to the equipment of furnaces for melting metals and alloys, namely to steelmaking furnaces.

Известны во доохлаждаемые своды коробчатого типа с огнеупорной набивкой со стороны рабочего пространства печи, состоящие из от- ⁵дельных секций, или неразъемные, имеющие общую водоохлаждаемую полость с напорными сливными трубами [1J и [2].Known in box-type re-cooled arches with refractory packing on the side of the furnace working space, consisting of ⁵ separate sections, or one-piece, having a common water-cooled cavity with discharge pipes [1J and [2].

Наиболее близким по технической сущности и достигаемому эффекту к предлагаемому изобретению является водоохлаждаемый свод коробчатого типа, водяная полость которого разделена при помощи стенки, имеющей отверстия в верхней части, на центральную и периферийную полости. Подача воды и полость свода осуществляется через патрубок в периферийную, а затем в центральную часть, отвод воды производится через патрубок из центральной части (3]. 20The closest in technical essence and the achieved effect to the proposed invention is a water-cooled box-type arch, the water cavity of which is divided by a wall having holes in the upper part into the central and peripheral cavities. Water supply and the cavity of the arch are carried out through the nozzle to the peripheral, and then to the central part, water is discharged through the nozzle from the central part (3]. 20

Недостатками конструкций являются: значительный расход воды, неравномерность охлаждения центральной части свода, приводящая к прогару свода в околоэлектродной зоне, что в конечном итоге снижает срок его службы и надежность.The disadvantages of the designs are: significant water consumption, uneven cooling of the central part of the arch, leading to burnout of the arch in the near-electrode zone, which ultimately reduces its service life and reliability.

Целью изобретения является обеспечение равномерного охлаждения элементов свода, повышение срока службы, надежности и снижение расхода воды.The aim of the invention is to ensure uniform cooling of the elements of the arch, increasing the service life, reliability and reducing water consumption.

Это достигается тем, что центральная полость свода разделена диафрагмой с отверстиями на околоэлектродиую и заэлектродную зоны, имеющие каждая свой ввод и общий, расположенный в околоэлектродной зоне, отвод воды, что обеспечивает равномерное охлаждение свода за счет направленного потока воды из заэлектродной в околоэлектродиую зону.This is achieved by the fact that the central cavity of the arch is divided by a diaphragm with holes into the near-electrode and near-electrode zones, each having its own input and a common water outlet located in the near-electrode zone, which ensures uniform cooling of the arch due to the directed flow of water from the near-electrode to the near-electrode zone.

На фиг. 1 показан свод в разрезе, общий вид; на фиг. 2 - вид по стрелке А на фиг. 1.In FIG. 1 shows a cross-sectional arch, general view; in FIG. 2 is a view along arrow A in FIG. 1.

Водоохлаждаемый свод представляет собой футерованную со стороны рабочего пространства печи металлическую конструкцию, состоящую из периферийной части 1 и центральной части, разделенной при помощи диафрагмы 2 с отверстиями 3 на заэлектродную 4 и околоэлектродную 5 зоны. Периферийная часть свода имеет входной 6 и сливной 7 патрубки, разделенныеThe water-cooled arch is a metal structure lined from the side of the furnace’s working space, consisting of a peripheral part 1 and a central part separated by a diaphragm 2 with holes 3 into an electrode 4 and a near electrode 5 zone. The peripheral part of the arch has an inlet 6 and a drain 7 nozzles, divided

-/ между собой перегородкой 8. В околоэлектродной и заэлектродной зонах свода размещены спрейерные кольцевые трубы 9 и 10 с входными патрубками 11 и 12. В околоэлектродной зоне свода расположен сливной патрубок 13.- / between each other by a partition 8. In the near-electrode and behind-electrode zones of the arch, sprayer annular tubes 9 and 10 with inlet pipes 11 and 12 are located. In the near-electrode zone of the arch is a drain pipe 13.

Вода, охлаждающая свод, через входные патрубки 6, 11, 12 поступает в периферийную часть 1, заэлектродную 4 и околоэлектройную 5 зоны свода. В периферийной части 1 вода от входного патрубка 6, огибая кольцевой’ контур свода, охлаждает его и сливается через патрубок 7. В заэлектродную 4 и околоэлектродную 5 зоны вода поступает по кольцевым спрейерным трубам 9, 10. У спрейерной трубы 9 суммарное сечение выходных отверстий больше, чем у спрейерной трубы 10, поэтому вода из менеее нагретой заэлектродной зоны через отверстия 3, расположенные в диафрагме 4, направленно перетекает·с подпором в более нагретую околоэлектродную 5 зону. Вода, поступающая из заэлектродной зоны в околоэлектродную, смешивается в последней с водой, поступающей из спрейерной трубы 10, понижает ее температуру и температуру свода и сливается через общий патрубок 13.Water cooling the vault through the inlet pipes 6, 11, 12 enters the peripheral part 1, the electrode 4 and the near-electrode 5 zones of the arch. In the peripheral part 1, water from the inlet pipe 6, enveloping the annular 'contour of the arch, cools it and merges through the pipe 7. In the 4 electrode and near-electrode 5 zones, water enters through the annular spray pipes 9, 10. The total cross section of the outlet openings in the spray pipe 9 is larger than the sprayer pipe 10, therefore, water from the less heated electrode region through the holes 3 located in the diaphragm 4, directionally flows · with backwater into the more heated near electrode 5 zone. The water coming from the near-electrode zone to the near-electrode zone is mixed in the latter with water coming from the spray pipe 10, lowers its temperature and the temperature of the arch, and drains through a common pipe 13.

Разделение центральной части свода диафрагмой с отверстиями на заэлектродную и околоэлектродную зоны с отдельным подводом охлаждающей воды через патрубки и спрейерные трубы, имеющие различное суммарное сечение ээч/ ₄ выходных отверстий и слив воды через общий патрубок, сечение которого согласовано с сечением входных патрубков, позволяет производить более интенсивное охлаждение свода при меньшем расходе воды.Separation of the central part of the vault by a diaphragm with holes into the electrode and near electrode zones with a separate supply of cooling water through nozzles and spray pipes having different total cross-sections of the electric pipe / ₄ outlets and water discharge through a common nozzle, the cross section of which is consistent with the section of the inlet nozzles, allows for more intensive cooling of the arch with less water consumption.

Claims

The invention relates to equipment for melting metals and alloys, namely steel-making furnaces. Water-cooled box-shaped vaults with refractory gasket from the furnace working space are known, consisting of separate sections or one-piece, having a common water-cooled cavity with pressure discharge pipes 1 and 2. The closest in technical essence and achievable effect to the proposed invention is water-cooled a box-type arch, the waters of which are divided by a wall with openings in the upper part, into the central and peripheral cavities. Water is supplied and the cavity of the vessel is carried out through the nozzle into the peripheral and then into the central part, water is discharged through the nozzle from the central part (3. Structural deficiencies are: significant water consumption, uneven cooling of the central part of the arch, resulting in burnout of the vault in the near-electrode zone, which ultimately reduces its service life and reliability. The aim of the invention is to ensure uniform cooling of the vault elements, increase service life, reliability and reduce water consumption. that the central cavity of the vault is divided by a daafragma with openings into the near-electrode and trans-electrode zones, each having its own input and a common water outlet located in the near-electrode zone, which ensures uniform cooling of the arch due to the directional flow of water from the over-electrode to the near-electrode zone. Fig. 1 shows the vault in section, a general view; and Fig. 2 is a view along arrow A in Fig. 1. The water-cooled vault is a metal structure lined from the working space of the furnace, consisting of the peripheral part 1 and the central part, divided by the diaphragm 2 with the holes 3 into the electrode 4 and near-electrode 5 zones. The peripheral part of the vault has an inlet 6 and a drain 7 nozzles separated by a VG v, V intersection by a partition 8. Spray ring pipes 9 and 10 with inlet nozzles 11 and 12 are located in the near-electrode and electrode areas of the roof. the cooling roof through the inlets 6, I, 12 enters the peripheral part 1, the electrode 4 and the near electrode 5 of the arch. In the peripheral part 1, water from the inlet nozzle 6, by bending the annular contour of the vault, cools it and discharges through the nozzle 7. Water enters the overhead 4 and near 5 electrodes through kolydyevy sprayer pipes 9, 10. The sprayer pipe 9 has a total cross section of outlet openings than the sprayer tube 10, therefore, water from the less heated electrode zone through the holes 3 located in the diaphragm 4, flows in a directional direction with a backwater into the more heated electrode zone 5. Water coming from the electrode to the near-electrode zone is mixed in the latter with water coming from the sprayer pipe 10, lowers its temperature and the temperature of the roof and is discharged through a common nozzle 13. Separation of the central part of the roof with a diaphragm with openings to the electrode and near-electrode zones with a separate supply cooling water through the nozzles and sprayer pipes with different total cross-section of the OUTPUT orifices and water drain through the common nozzle, the cross-section of which is consistent with the cross-section of the inlet nozzles, allows It does not produce more intensive cooling of the arch with less water flow. Invention Water-cooled box-type roof containing refractory lining on the side of the furnace working space, peripheral and central parts, water supply and drain elements, characterized in that, in order to increase the service life and reliability of the arch by ensuring uniform cooling of its elements, the central cavity The vault is equipped with a diaphragm with apertures dividing it into the near-electrode and trans-electrode zones, each having its own input and a common water discharge located in the near-electrode zone. Information sources taken into account during the examination 1. USSR author's certificate No. 367328, cl. F 27 D 1/02, 1973.

2. USSR author's certificate N 403752, cl. C 21 C 5/52, 1973.

3. USSR author's certificate number 462055, cl. F 27 D 1/00, 1975 (prototype).