A kind of fly ash clinker sintering device

Abstract

The invention relates to a fly ash clinker sintering apparatus, especially relates to a clinker sintering apparatus applied to the process for preparing alumina by fly ash-ammonium sulfate sintering method, and the method solves the problems that the prior art has the difficulties for meeting large-scale production requirements, and low heat exchange efficiency, high production cost, etc. The apparatus is provided with a preheater, a sintering kiln, a cooling machine, an air heat exchanger, a hot-blast stove and a dust collecting system; the preheater is connected with a sintering kiln tail; the cooling machine and the hot-blast stove are respectively connected with the head of the sintering kiln; the air heat exchanger is respectively connected with the cooling machine, the hot-blast stove and the cooling machine duct collecting system; the preheater is connected with a rotary kiln dust collecting system; the preheater, the sintering kiln, the cooling machine, the air heat exchanger, the hot-blast stove, and the dust collecting system are in one workshop. The invention can satisfy large-scale industrial production, and avoid loss by generation of ammonia gas in sintering, and effectively recycle heat in the system, and thereby realizing energy saving and consumption reduction.

Description

technical field [0001] The invention relates to a coal ash clinker sintering device, in particular to a clinker sintering device applied in the "fly ash-ammonium sulfate sintering method to produce alumina process". Background technique [0002] In the clinker sintering kiln, ammonium sulfate reacts with fly ash to produce clinker (mainly aluminum ammonium sulfate and silicon slag) and ammonia gas, and this part of ammonia gas needs to be recycled . Once the heat source contains carbon dioxide, the carbon dioxide will react with ammonia gas in the ammonia absorption system to form ammonium bicarbonate, resulting in the loss of ammonia gas. [0003] At present, there are two corresponding sintering technologies, namely the indirect externally heated reaction kiln technology and the patent 201120263968.5 "a sintering rotary kiln device for producing alumina with fly ash by low temperature ammonia method". [0004] "Indirect external heating reaction kiln technology" uses ind...

AI Technical Summary

Problems solved by technology

[0016] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a fly ash clinker sintering device, which solves the problems in the prior art that it is difficult to adapt to large-scale production requirements, low heat exchange efficiency, and high production cost.

Images