• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A vertical strip heating furnace includes at least two vertical direct fired heating chambers which are arranged in parallel which are communicated with each other. A separation chamber for housing inside furnace rolls at adjacent pairs of the chambers is provided in at least one location. The inside furnace rolls are separated from the main flow of the combustion gases and the temperature of the atmosphere in the chambers housing the inside furnace rolls is adjusted to within a fixed range. This strip heating furnace is capable of large capacity processing and is designed to save energy, and the inside furnace rolls are free from breakage due to thermal stress.
    公开号:SU797614A3
    申请号:SU772535802
    申请日:1977-10-26
    公开日:1981-01-15
    发明作者:Енезава Тосия；Кобаяси Кацусси
    申请人:Ниппон Стил Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    (54) VERTICAL OVEN FOR DIRECT HEATING OF A STEEL STRIP one or more than three chambers of direct heating, depending on the required performance, and also provide for several heating chambers to provide energy savings. The furnace contains a heating chamber 1 located vertically and parallel to two chambers 2 and 3 of direct heating, and the chambers are arranged in the specified order, starting from standing up along the strip. The steel strip passes after-reliably along the deflecting roller 4, through the heating chamber 1 / chambers 2 and 3 of direct heating and also through the throat 5 and out of the next subsequent recovery chamber (not shown). The flow of gaseous products of combustion in the direction opposite to the direction of movement of the strip is provided by a fan (shown) provided in the heating chamber located behind the chamber of direct heating of the strip. Preheating chamber 1 has, at its entrance b, a shutter 7 consisting of two sealing rollers capable of shifting relative to the surface of the strip. The shutter prevents the exit of gaseous products to the outside of the furnace through the inlet b. Directly at the entrance b there is a window 8 for the release of gaseous combustion products, which are discharged to the outside of the building through a device for regulating the pressure in the furnace and the exhaust pipe (not shown). The first chamber 2 and the second chamber 3 of direct heating, located behind the heating chamber 1, are provided with a large number of burned 9 open to each camera and the strip is directly heated by these burners. The inlet 10 of the first chamber 2 of direct heating and the outlet 11 of the heating chamber 1 are connected to the gas duct 12 passing horizontally, and the outlet 13 of the first chamber 2 of the direct national heater and the inlet 14 of the second chamber 3 direct heating are likewise in communication with the gas duct 15. gas ducts 12 and 15 pass only the gaseous products of combustion, and the line does not pass through them. Below the duct 12, a lower chamber 16 is provided for the rollers, parallel to the duct 12 and separated from the heating chamber 1, the first chamber 2 of the direct heating of the strip and duct 12 by a partition 17. The latter has a narrow passage 18 for the strip which. opens to exit 11 1 under the Greek, and a similar passage 19, which opens to the first chamber 2 of direct heating of the strip. In the aisles 18 and 19, water-cooled dampers 20 and 21 are provided for dl - adjusting the width of the aisle by turning the dampers around horizontal axes. The water cooling valves 20 and 21 open and close, controlling them outside the furnace. Below passages 18 and 19, a pair of guide rollers 22 is positioned to change the direction of movement of the strip by 90 °, and this pair of guide rollers 22 can be rotated by means of an all-water device (not shown). The flue duct .15 has an upper roller chamber 23 similar to that of the lower roller chamber 16, the curler 23 is separated from the first direct heating chamber 2, the second direct heating chamber 3 and the flue 15 by a partition 24. The partition 24 has aisles 25 and 26, and in the upper chamber 23 for rollers a pair of guide rollers 27 is placed. For a more reliable separation of the upper chamber 24 for rollers, there is a narrowing section 28 of the passage and a cytallic device 29 containing a water-cooling valve 30 in the cavity 31 of the narrowing areas. The constriction section 28 should ensure as little as possible the gap between it and the surface of the strip, but taking into account the ease of the strip filling operation, it is desirable to maintain the gap: 100 mm on one side. Consequently, to provide protection from radiant {thermal penetrating into chamber 23 for rollers from chambers 2 and 3 of high-temperature direct heating and minimizing the influx of gaseous combustion products, an openable water cooling valve 30 is provided. to obtain the effect of a gas curtain. The gap from the surface of the strip in case the water-cooled fouling flap 30 or the gas nozzle is closed must be maintained {& 25 mm per side, taking into account the possible waviness of the strip. Consequently, during the filling of the strip, the water cooling compartment or gas nozzle must be opened to facilitate the filling operation. Although between the lower chamber 16 for the rollers, the heating chamber 2 and the heating chamber 1 may be a narrowing area similar to the upper section, it is not provided in this device so as to facilitate the strip from the furnace to break the strip. The opening and water cooling of the shutter 20 and 21 are provided to limit the penetration of radiant heat to a minimum and the inflow of combustion gases. The water-cooled dampers 20 and 21 installed in the lower chamber 16 for the rollers are basically identical with the upper flap 30, all that needs to be considered is the opening magnitude when the furnace is opened to remove the strip.
    To prevent the temperature of the high-temperature gas penetrating into the lower chamber 16 for the rollers and to keep the gas temperature slightly perpendicular, as well as to maintain the proper temperature in order to minimize the thermal stresses in the body of the rollers, the lower chamber 16 for the rollers is connected with a reducing heating chamber and a throat 5 with a pipe 32. Pipe 32 contains a heat exchanger 33 for cooling the gaseous products of combustion to the proper temperature, fan 34 for injecting gas ase products in the lower chamber 16 and regulirukzhki valve 35 for adjusting the flow of gaseous combustion products. The control valve 35 controls the temperature sensor 36, the controls; & | yes temperature in the lower chamber 16 for the rollers. Similarly, the upper roller chamber 23 communicates with the heating chamber 2 by means of a pipe 01 of the conductor 37 containing a heat sink 38, a fan 39 and a valve 40 for controlling the flow. An adjustable valve 40 controls the temperature sensor 41 provided in the upper chamber 23 for the rollers.
    The high-temperature gases supplied to the lower chamber 16 and the upper roller chamber 23 from water from a suitable place in the furnace, but it is not limited to using gases supplied from the outside. FIG. 3 shows a variant of the device in which the tank 42, which is properly filled with hot and compressed gas and the lower roller chamber 16, is connected via a pipe 43 containing a control valve 44 for controlling the flow of gases, which is detected by a temperature sensor 45. in the lower chamber 16 for rollers, high-temperature gaeans from reservoir 42 are maintained.
    This device has two heating chambers 2 and 3 and one keiler of heating 1, and narrowing sections to protect the rollers are provided only for the upper chamber 23, but more than two heating and more than two heating chambers can be provided, as well as a narrowing section 28 for each chamber for commercials.
    The furnace works as follows.
    The strip enters from the deflecting roller 4 through the inlet shutter 7 9. The heating chamber 1 is heated and
    Approximately to 2000C gaseous combustion products (approximately) flowing from the heating chamber 2, and then heated to approximately high-temperature gases (SOOO C1150 ° C) in the first chamber 2 of direct heating in the interval from the lower roller 22 in the lower chamber 16 to the upper roller 27 in the upper chamber 23 and then reheated to 650 C high-temperature gases (IISO-C0 in the second vertical chamber. 3 direct heating in the interval from the upper roller 27 to the lower roller 22 and after that enters the reducing chamber of indirect heating.
    The main part of the gaseous combustion products formed in the vertical chambers of direct heating is not included in the upper and lower KctMepH for the rollers that are separated, but after passing through the ducts 12 and 15, goes out through the exhaust window () 18 .
    If in the part that connects the camera and for
    5 rollers (Fig. 2), a protective device is provided that provides almost complete protection against radiant heat, and if the temperature in the roller chamber can be controlled by a heat exchanger 33, 38 and a fan 34, 39, then an abnormal temperature rise can be prevented camera for rollers.
    five
    The proposed furnace can be large, with a size of 140 t / h, which is economical. gas flame cleaning process. A unit with higher performance can be designed by connecting direct heat chambers.
    The device provides a compact connection of the heating chamber to the front surface of the heating chamber, the strip is not exposed to the atmosphere and can be heated to high temperatures.
    权利要求:
    Claims (1)
    [1]
    1. US patent 3837790, cl. 432-8, 1974.
    /
    8 С
    /P ,
    18
    2022g /
    23
    2t
    five
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    同族专利:
    公开号 | 公开日
    DE2745595C3|1980-07-03|
    FR2369349B1|1980-12-12|
    AU512869B2|1980-10-30|
    DE2745595A1|1978-05-03|
    CA1086497A|1980-09-30|
    ES463553A1|1978-08-01|
    US4165964A|1979-08-28|
    JPS5912729B2|1984-03-26|
    BR7707176A|1978-07-25|
    DE2745595B2|1979-10-18|
    MX146595A|1982-07-14|
    GB1568640A|1980-06-04|
    AU2968377A|1979-05-24|
    FR2369349A1|1978-05-26|
    JPS5354106A|1978-05-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2009856A|1934-03-21|1935-07-30|Gen Electric|Annealing furnace|
    US2499191A|1948-09-22|1950-02-28|Gen Electric|Vertical loop furnace|
    US3421746A|1967-04-24|1969-01-14|Lyle E Mccoy|Heating apparatus for elongate material|
    US3492378A|1968-05-13|1970-01-27|Bethlehem Steel Corp|Method of operation of a continuous strip heating furnace|
    US3532329A|1968-11-01|1970-10-06|Selas Corp Of America|Strip heating apparatus|
    US3837790A|1972-12-29|1974-09-24|Armco Steel Corp|Method and apparatus for heating metallic strip|
    US3827854A|1973-10-26|1974-08-06|W Gildersleeve|Automatic metal protecting apparatus and method|
    US3857673A|1974-03-08|1974-12-31|E Andrus|Apparatus for heat treating continuous wire and rod|JPS5924166B2|1977-10-20|1984-06-07|Nippon Steel Corp|
    JPS5811493B2|1978-12-29|1983-03-03|Nippon Steel Corp|
    JPS5942733B2|1979-10-31|1984-10-17|Kawasaki Steel Co|
    US4296919A|1980-08-13|1981-10-27|Nippon Steel Corporation|Apparatus for continuously producing a high strength dual-phase steel strip or sheet|
    US4364728A|1981-05-19|1982-12-21|The Electric Furnace Company|Continuous strip preheat furnace and method of operation|
    US4395021A|1982-02-08|1983-07-26|Nippon Steel Corporation|Vertical continuous annealing furnace and its operating method|
    US4494929A|1982-03-19|1985-01-22|Nippon Steel Corporation|Continuous heat treatment furnace|
    JPS6250572B2|1982-10-28|1987-10-26|Toray Industries|
    US4522586A|1983-11-29|1985-06-11|Price Frank C|Thermal conditioning of material in containers|
    US4591336A|1984-04-19|1986-05-27|Moco Thermal Industries|Oven for curing resin-coated wires|
    US4692114A|1986-03-26|1987-09-08|Dynapert-Htc Corp.|Vapor level control for vapor processing system|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP51129966A|JPS5912729B2|1976-10-27|1976-10-27|
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