Power station technology

Power station ash with gypsum suspension

AVA received a contract to supply eight continuous mixers (type HTK) for the humidification of fly-ash at a large power station in Turkey.

The machines process 260 t/h of power station ash with gypsum suspension. The aim of the ash treatment is to achieve a dust-free final product with simultaneous reaction of the CaO contained in the ash and without the accumulation of not humidified material. For this purpose, as part of the mixing process, even single grains of the product are brought into a trajectory and in contact with the liquid. Even fine dust with a partial size of 1^-6 m are moistened to a dust-free final product. The liquid is added into the AVA Mixer by a pipe without spray nozzles. Therefore dirty water can be used without complications. If a granular material is required instead of a just dust-free product, a separately driven cutting chopper is used. These units are also required for disintegration of larger lumps in the product.

The advantages of the type HTK system are obvious:
Short residence times of ~ 10 – 30 sec., no manual cleaning, automatic re-starting, even after long periods of shutdown, an extremely robust design and low maintenance expenditure. In order to ensure 24 hour operation under all circumstances, a stock keeping concept for replacement parts and wear parts was generated. Due to the high vertical integration, AVA is able to deliver spare parts within a very short time, even in the event of unusual breakdown.

Machines used:

Continuous mixer
Batch mixer

Contact partner for applications:
info(@)ava-americas.com

Download:
Power stations, ashes and dusts (PDF, 1192 KB)