Apparatus for insertion and extraction of fuel injection lances into and out of the tuyere stock of a blast furnace
A tuyere elbow, blast furnace technology, applied in the direction of tuyere, lighting and heating equipment, furnaces, etc., to achieve the effect of reducing time
Inactive Publication Date: 2011-06-15
PAUL WURTH SA
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Problems solved by technology
While this device appears to be helpful for removing injection lances, especially curved ones, the device is not particularly helpful for insertion
Method used
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[0029] figure 1A conventional tuyere elbow, generally designated with reference numeral 1 , is schematically shown. The tuyere elbow 1 comprises a tuyere 2 forming the downstream end of the tuyere elbow 1 and through which hot blast air is blown into a blast furnace (not shown). The tuyere 2 is supported within a tuyere cooler frame 3 which is fixed to the furnace shell and which does not form part of the tuyere elbow 1 which is movably suspended relative to the furnace. The tuyere elbow 1 further includes a blowpipe 4 connected upstream of the tuyere 2 and an elbow 5 connected upstream of the blowpipe 4 . The elbow 5 may comprise an inspection hole arrangement (not shown) axially aligned with the tuyeres 2 . The elbow 5 of the tuyere elbow is connected by means of a downleg 6 to a hot blast enclosure (not shown), from which hot blast air is fed through the cooling column 6, the elbow 5 and the blowpipe 4, that is, through the pipeline conduit formed by the tuyere elbow 1 ...
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An apparatus (20) for insertion and extraction of a fuel injection lance (10) into and out of a tuyere stock (1) of a shaft furnace, in particular of a blast furnace, is proposed. The tuyere stock (1) comprises a lance sheath (12) that defines an insertion / extraction axis (49) and is mounted in coaxial extension of a lance channel through which an injection lance can be inserted into the tuyere stock. The proposed apparatus comprises a linear guide (22), a carriage (24) and a mounting support (50). The carriage is movably supported by the linear guide and cooperates with a connecting device (42) for connecting an injection lance to the carriage such that the injection lance can be moved axially along a translation axis by the carriage. The linear guide comprises a mechanism (36; 38) for linearly moving the carriage along a guide axis (35) and a first coupling half (64; 65; 66) for mounting the linear guide (22) to the mounting support attached to the tuyere stock. The mounting support(50) has a second coupling half (57; 58; 62) cooperating with the first coupling half (64; 65; 66) of the linear guide for removably attaching the linear guide to the tuyere stock. The mounting support (50) and the coupling halves (57; 58; 62; 64; 65; 66) orient an attached linear guide (22) so that the guide axis (35) of the linear guide in parallel to the insertion / extraction axis (49) and so that the translation axis of an injection lance (10) connected to the carriage (24) is coaxial with the insertion / extraction axis (49).
Description
technical field [0001] The present invention generally relates to the installation of fuel injection lances to the tuyere elbow of a blast furnace. More specifically, the present invention relates to the insertion process of a fuel injection lance, particularly an oxy-coal injection lance, into a tuyere elbow and the extraction process of a fuel injection lance from a tuyere elbow. Background technique [0002] Fuel injection lances are used to inject combustibles (such as pulverized coal) into the hot blast introduced into the blast furnace through the tuyere elbow. Excessive wear or destruction of the spray gun tip, eg due to burning and wear, requires periodic replacement of such spray guns for maintenance and repair purposes. [0003] Currently, the typical process for changing fuel injection guns, ie, removing the gun for service and inserting a new or refurbished gun, requires manual intervention by three to four operators. According to this typical process, the oper...
Claims
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IPC IPC(8): C21B7/16F27B1/16
CPCC21B7/16F27B1/16F27D1/18
Inventor 本·穆勒保罗·格德特克里斯蒂安·伦克斯帕特里克·胡特马赫
Owner PAUL WURTH SA