• 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 nozzle for the spraying of black liquor in a recovery boiler has discharge orifice inserts that can be removed and replaced with other inserts, to provide variable spray patterns, by changing the size and/or shape of the orifice of the nozzle, without requiring replacement of the entire nozzle body, to enable fine tuning of the atomization of the spray.
    公开号:SE534983C2
    申请号:SE0950006
    申请日:2007-06-20
    公开日:2012-03-06
    发明作者:Mohomed Jameel；Daniel Higgins
    申请人:Clyde Bergemann Inc；
    IPC主号:
    专利说明:

    534 983 parts of the nozzle body 23. Fluid traveling through the outlet orifice contracts and spreads like a solar fider forming a thin layer that eventually breaks up into droplets that burn.
    At the beer-can nozzle 30, the fluid is delivered through the tube 34 provided at the inlet nozzle 31 on the nozzle body 33. The fluid leaves the nozzle through the outlet orifice 32. Both the inlet orifice 31 and the outlet orifice 32 are integral parts of the nozzle body 33. Fluid passed through the inlet 31 small transition channel 35 and enters the inner cavity 36 of the nozzle body 33 at a point tangential to the cavity wall. The fluid swirls around the cavity and eventually leaves the nozzle body 33 through the outlet orifice 32 at the bottom of the nozzle body. The fluid that leaves the outlet orifice spreads like a cone that eventually breaks up into burnt droplets.
    Summary of the invention According to the invention, a nozzle was made to spray black liquor into a parma, where the outlet mouth of the nozzle can be easily varied without having to change the entire nozzle. This makes it possible to accurately adjust the atomization to the specific combustion preparation at that time and place.
    The object of the invention is particularly pointed out and distinctly protected in the concluding part of this description. However, both the structure and the driving method, together with additional advantages and the sewing thereof, can best be understood by reference to the following description taken in conjunction with the accompanying drawings, in which like reference numerals refer to the same elements.
    Brief Description of the Drawings Figure 1: Cross section of a spreader plate nozzle according to prior art.
    Figure 2: Cross section of a V-jet nozzle according to prior art.
    Figure 3: Overview view of a beer-can nozzle according to prior art.
    Figure 4: Cross section of a beer-can nozzle with variable mouth. 534 983 Figure 5A: Bottom view of the outlet end of the variable-mouth beer-can nozzle.
    Figure SB: Detailed view of roller pin and orifice plate from 5 gur 5A.
    Detailed description In order to optimize the burn and the chemical reduction, it may be necessary to change the orifice size to vary the injection pressure or to vary the flow rate. For all prior art nozzles according to the above, the outlet orifice is an integral part of the nozzle body, which would thus require that the entire nozzle body be replaced before changing the orifice. In another example, it may be necessary to change the myrrh due to wear resulting in increased flow area and / or change in shape. With the nozzle arrangement according to the invention described here, only a single part needs to be replaced which houses the opening for the outlet mouth to be able to change the size of the ore.
    Figures 4 and 5 show the arrangement with a beer-can nozzle 40 in accordance with this invention. Figure 4 shows the cross section through the nozzle while Figure 5A shows a view of the lower part of the nozzle 50 with the details of the variable orifice. Figure SB gives a more detailed view of a portion of the arrangement in Figure 5A. In the case of the beer can nozzle 40, the lead is delivered through the tube 41 provided at the inlet orifice 45 of the nozzle body 42. According to Figure 5A, the lead entering through 41 travels through the passage 51 and enters the body at the top of the inner cavity 46 of the nozzle as it travels tangentially to its wall. The fluid swirls around the inner cavity as illustrated and is finally expelled through the orifice 44. The orifice is made by drilling a hole in the orifice plate 43. Unlike prior art 30 in Figure 3, this plate is not an integral part of the nozzle body 42. is a totally independent component located in a recess at the exit end of the nozzle. When the nozzle is used, the orifice plate faces downwards. A locking ring 48 prevents it from falling out of the nozzle body. To provide the swirling flow within the nozzle, the outlet orifice should rotationally lie in the quadrant furthest from the inlet orifice. To maintain this position, the myrring plate is securely held by pin 49 which has a portion of its circumference engaged with the plate 43 while the remainder is engaged with the housing 42. Instead of the pin, a flat surface may be cut out. on the perimeter of the plate. A corresponding flat surface is cut in the nozzle body. In any case, the pin or the flat surface and the orifice hole are set 180 ° apart and lie along the line 52 which forms an angle of 4S ° towards the center line 54 of the inlet orifice. The pin is inserted into a hole in the housing.
    The depth of the hole is chosen so that the pin does not protrude beyond the surface of the plate. It is important to have the pin in the same plane as the outer surface of the plate to properly position the locking ring. While it is possible to hold the plate by cutting a male thread on the edge of the plate, corrosion and thread distortion due to heat do not make it particularly practical. In order to enable the use of the nozzle in the environment of a parma and to be able to maintain the possibility of changing the orifice diary text by replacing the orifice plate, the nozzle housing is made of different materials which have substantially different coefficients of thermal expansion.
    The coefficient of thermal expansion of the plate is greater than that of the nozzle housing.
    The plate diameter and the recess diameter of the nozzle body are carefully controlled so that a specific gap 47 is maintained between the two at room temperature (~ 20 ° C). The black liquor delivered to the nozzle is in the range 100-130 ° C. Therefore, the plate will expand more than the casing at elevated temperatures and thus close to the gap 47 and ensure a seal of the inner chamber 46. When the nozzle is taken out of service and the temperature is lowered to room temperature, the plate will shrink to its original size, which in turn will to increase the clearance between these two components to enable the replacement of the plate and thereby to change the marrow diameter.
    Thus, a nozzle arrangement according to the invention was provided to enable a change in the muzzle properties to adjust flow and spray pattern without having to replace the entire nozzle body. This can result in lower costs for operation and maintenance, for example. Furthermore, the orifice properties can be changed to achieve desired droplet sizes and droplet velocities in the jet for optimal combustion in the parma.
    While a number of embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that many changes and modifications may be made without departing from the scope of the broader aspects. The accompanying claims are therefore intended to cover all such changes and modifications so that these fall within the scope of protection of the invention.
    权利要求:
    Claims (3)
    [1]
    Nozzle (40) for spraying black liquor in a parma capable of being used with a number of orifice sizes and shapes while using the same nozzle body, which nozzle (40) is characterized by: - a nozzle body (42) having an inlet groove (45) ), - a replaceable orifice plate (43) provided with an outlet orifice, which orifice plate has a flat surface cut out on the circumference of the orifice plate, - the nozzle body (42) having a corresponding flat surface for maintaining the position of the orifice plate (43) relative to the inlet orifice (45). the flat surfaces and the mouth hole (44) being separated by 180 °, and lying along a line forming an angle of 45 ° towards the center line (54) of the inlet orifice (45).
    [2]
    The nozzle (40) of claim 1, wherein said orifice plate is releasably attached to the nozzle body (42) by a locking ring (48).
    [3]
    A nozzle (40) according to any one of the preceding claims, wherein different orifice configurations comprise different geometric shapes to result in the generation of different spray patterns by replacing the orifice plate (43).
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    同族专利:
    公开号 | 公开日
    WO2007149950A3|2008-08-07|
    CA2657447C|2017-08-22|
    JP5280354B2|2013-09-04|
    US7926747B2|2011-04-19|
    US20080006725A1|2008-01-10|
    JP2009541703A|2009-11-26|
    SE0950006L|2009-01-09|
    BRPI0713490A2|2012-01-24|
    WO2007149950A2|2007-12-27|
    FI126305B|2016-09-30|
    FI20080669A|2009-01-20|
    CA2657447A1|2007-12-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2161111A|1935-05-25|1939-06-06|Babcock & Wilcox Co|Spray nozzle|
    GB469059A|1935-05-29|1937-07-19|British Thomson Houston Co Ltd|Improvements in and relating to nozzles for atomizing liquids|
    US4128206A|1977-05-31|1978-12-05|Delavan Corporation|Low drift flat spray nozzle and method|
    US4416422A|1981-07-01|1983-11-22|Ekono Oy|Steplessly adjustable device for injecting black liquor into a soda digester|
    US4793426A|1986-11-26|1988-12-27|Millsapps Jr Stuart C|Drill bit with covered ring nozzle retainer|
    US4878548A|1988-01-21|1989-11-07|Eastman Christensen|Nozzle retention system for a drill bit|
    JP2505833Y2|1990-11-29|1996-08-07|東洋運搬機株式会社|Lift cylinder lowering control device|
    SE469145B|1991-09-27|1993-05-17|Abb Carbon Ab|SEAT AND NOZZLE FOR SUPPLYING PASTABRAZLE TO A FLUIDIZED BED|
    US5247790A|1992-09-18|1993-09-28|Westinghouse Electric Corp.|Gas turbine fuel nozzle with replaceable cap|
    JP3177343B2|1993-05-21|2001-06-18|バブコック日立株式会社|Black liquor spray combustion device|
    JPH10156230A|1996-11-27|1998-06-16|Masatsugu Takahashi|Liquid spray nozzle|
    SE513796C2|1999-03-03|2000-11-06|Soederstroem|Apparatus for the cleaning of a soda pan's spray gun|
    US6227316B1|1999-03-10|2001-05-08|Dresser Industries, Inc.|Jet bit with variable orifice nozzle|
    FI115998B|2000-10-17|2005-08-31|Andritz Oy|Device for feeding black liquor into a recovery boiler|SE531021C2|2007-03-28|2008-11-18|Metso Power Ab|Device for adjusting equipment to a boiler|
    RU2660856C2|2012-08-29|2018-07-10|Сноу Лоджик, Инк.|Modular two-vector spray fluid nozzles|
    US20140263707A1|2013-03-14|2014-09-18|Generac Power Systems, Inc.|Pressure Dependent Variable Shape Nozzle Assembly|
    US11232874B2|2017-12-18|2022-01-25|Ge-Hitachi Nuclear Energy Americas Llc|Multiple-path flow restrictor nozzle|
    法律状态:
    2019-01-29| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    US80546006P| true| 2006-06-21|2006-06-21|
    PCT/US2007/071714|WO2007149950A2|2006-06-21|2007-06-20|Variable orifice black liquor nozzle|
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