Pulverized coal injection lance

Details Pulverized coal injection lance Pulverized coal injection lance

2007-07-05

2011-12-20

Kastler, Scott (Department: 1733)

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By means introducing treating material

C266S268000

Reexamination Certificate

active

08080200

ABSTRACT:
The present invention proposes a pulverized coal injection lance (10) for feeding pulverized coal from a rear end of the lance (10) to a front end (11) of the lance (10). The lance (10) comprises an outer pipe (12) for conveying combustive gas, and an inner pipe (14), coaxially arranged within the outer pipe (12), for conveying pulverized coal. The inner pipe (14) forms a separation wall for separating the pulverized coal from the combustive gas. The separation wall is at least partially discontinued in a region near the front end (11) of the lance (10), thereby forming a mixing region (16) within the pulverized coal injection lance (10). According to an important aspect of the invention, the outer pipe (12) and the inner pipe (14) have substantially the same length and wherein the inner pipe (14) comprises at least one lateral opening (18, 20) for allowing pulverized coal and combustive gas to come into contact within the pulverized coal injection lance (10) near the front end (11).

REFERENCES:
patent: 2560074 (1951-07-01), Bloomer
patent: 3758090 (1973-09-01), Shimotsuma et al.
patent: 5333840 (1994-08-01), Skold et al.
patent: 0447908 (1991-09-01), None
patent: 0554673 (1993-08-01), None
patent: 1060272 (2000-12-01), None
International Search Report PCT/EP2007/056795 Dated Sep. 27, 2007.

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