SU1503866A1 - Fly-ash scrubber - Google Patents

Abstract

The invention relates to installations for the purification of flue gases containing ash and sulfur oxides - can be used in the chemical, metallurgical and other industries and allows to intensify the operation of the apparatus by stabilizing the acid neutralization process in the ash pulp when the content of sulfur oxides and alkaline components changes in the ash of flue gases. To do this, a concentric annular vertical partition 7 attached to the bottom 8 and the annular gap 10 forming with the housing is made porous, and the annular gap 10 is hermetically closed on top by a corresponding annular cover 9 having a protrusion 11 in an internal diameter coinciding with the internal diameter of the partition, made with a gap 12 with respect to the conical baffle cover 13 installed above the partition 7, with the said partition being at the same time a distributor of gaseous ammonia supplied through the bridge bki 14 communicated with said annular gap 10. The ash collector neutralization of ash contained in the pulp occurs acid by reacting the latter with ammonia bubbles, appearing in the film pulp flowing on one side of the porous surface of the partition 7, on the opposite side penetrated ammonia. 1 il.

Description

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The invention relates to installations for the purification of flue gases containing ash and oxides of sulfur, and can be used in the chemical, metallurgical and other industries.

The purpose of the invention is to intensify the work by stabilizing the acid B neutralization process of ash pulp when changing the content of sulfur oxides and alkaline components in the ash of flue gases.

The drawing shows the apparatus, a general view.

The ash collector includes a housing 1, a nozzle 2 for flue gas inlet, a nozzle 3 for discharging cleaned flue gases, nozzles 4 and 5 for irrigating gas and the walls of the housing, an outlet nozzle 6 for removing ash slurry, concentric vertical ring porous partition 7, hermetically connected to the bottom 8 housing, a horizontal ring cover 9, hermetically closing the top of the annular gap 10 and having a protrusion 11 on the inner diameter coinciding with the inner diameter of the porous partition 7, made with a gap 12 relative to kryschki-ethnic bump stopper 13 installed above the lid 9, and means for supplying ammonia gas into the annulus 10 as a nozzle 14.

The ash collector works as follows.

Flue gases containing ash and sulfur oxides flow through the inlet 2, where they are irrigated with water through the nozzles 4, pass into the housing 1, where they are irrigated with water through the nozzles 5, and then out of the ash collector through the nozzle 3.

As a result of the interaction of flue gases with irrigating water, particles of ash are collected, and sulfur oxides are dissolved in water. The aeolian pulp swells along the walls of the housing 1 and collects in the outer annular channel formed by the wall of the housing and the protrusion 11 of the lid 9. The pulp overflows through the protrusion 11 that flows

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film along the inner porous surface of the annular partition 7. Gaseous ammonia is fed through the nozzles 14 into the annular gap 10, from which it passes through the porous surface, which plays the role of a gas distributor, in the form of small bubbles into the flowing film of ash pulp. Neutralization of the acid in the pulp occurs both due to the alkaline components of the ash and to ammonia gas, which is supplied depending on the content of sulfur oxides and alkaline components in the ash of flue gases. The neutralized pulp leaves the ash collector through nozzle 6. Stability of the neutralization process is ensured by turbulence of the flowing film of ash pulp by bubbles of gaseous ammonia on the porous surface, respectively, the efficiency of the apparatus increases when the content of sulfur oxides and alkaline components in the ashes of flue gases increases.

Claims (1)

Invention Formula Wet ash collector, comprising a housing with gas inlet and outlet nozzles and irrigation nozzles, a bottom, an annular vertical partition attached to the bottom and placed with an annular gap to the body, a conical chipper, located above the partition, means for supplying the gas agent, characterized in that, in order to intensify the work by stabilizing the neutralization process when the acid content in the ash pulp is changed by supplying gaseous ammonia to it, it is provided with an annular hermetically mounted cover with overlapping of the annular gap whose internal diameter is made equal to the internal diameter of the partition, while the protrusion is placed with a gap to the conical bump, the partition is made porous, and the rings second gap communicates with means for supplying gas agent.