Apparatus for thermal processing of raw materials in dust form

Details Apparatus for thermal processing of raw materials in dust form Apparatus for thermal processing of raw materials in dust form

1992-07-13

1994-03-08

Yuen, Henry C.

Heating

With heating gas conveying, agitating, scattering or...

432106, 432 14, F27B 702

Patent

active

052922472

ABSTRACT:
In cement clinker production lines having calcinator connected upstream of the rotary kiln and equipped with a second firing, in order that the most complete possible burnup or residual burnup, favorable from the standpoint of thermal economy, of uncombusted fuel constituents such as, for example, CO and/or uncombusted residual carbon be enabled in the calcinator, and indeed in the case of calcinators without, but in particular with, a device for the reduction of the NO.sub.x component present in the furnace off-gas (rotary kiln off-gas and calcinator off-gas), a low-pressure-drop swirl chamber (33) is arranged in the calcination stage (17) in the region of its flow diversion, which swirl chamber has an opening (32) in its upper region for the tangential inlet of gas-solids suspension and a central opening (34) on its bottom for the discharge of the swirled gas-solids suspension, and in its interior a solids-free or solids-poor, temperature-controlled core zone (36) of elevated temperature can be maintained for the implementation of certain reactions.

REFERENCES:
patent: 4295823 (1981-10-01), Ogawa et al.
patent: 4337032 (1982-06-01), Duplouy et al.
patent: 4425092 (1984-01-01), Brachthauser et al.
patent: 4457705 (1984-07-01), Ramesohl et al.
patent: 4514170 (1985-04-01), Kupper

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