Exhaust fans for special purposes ДН-15НЖ, ДН-17НЖ

ENERAL INFORMATION

Intended for suction of hot sulfur-containing and dust-laden smoke fumes from furnaces of technologic burning of metallurgical concern applied at nonferrous-metals industry, as well as for aggressive media handling in chemical industry.

Maximum temperature at exhauster inlet +450°C;
Dust content in gas flow not more than 40 g/nm3;
Contents of S02, S03 – up to 0,5%.

Special Purpose Smoke Exhangers

Smoke exhausters of the ДН-НЖ type refer to the centrifugal smoke exhausters of a special purpose, single suction. This type of equipment (exhauster) is used in ferrous and non-ferrous metallurgy to remove flue gases containing sulfur and dust from industrial furnaces in metallurgy and they are also used in the chemical industry to remove an aggressive chemical environment.

Used in the production of smoke exhausters ДН-НЖ technical characteristics have such basic indicators:

the temperature of the substance at the entrance to the mechanism – maximum +450 degrees Celsius;
up to 0.5% - allowable content of SO2, SO3;
gas flow – the maximum dust content is 40 g/nm3,
the inclusion of the smoke exhaust is allowed, if the temperature reaches such values: a minimum of -30°C, a maximum of +45 °C.

Special purpose smoke exhausters can work for a long time outdoors and indoors. They are made with a cantilever wheel, the rotation of which can be of two types: right (clockwise relative to the electric motor) and left. Material of manufacture – stainless steel of durable brands. In chimneys, cooling of the chassis shaft is used, since during operation it is necessary to protect the bearings from heating. The design features of the chassis allow you to change the bearings without removing the shaft.

Smoke exhausters of the type ДН-НЖ

More often than not, in the industry smoke exhausters of such standard sizes are used: ДН-15НЖ and ДН-17НЖ.

ДН-15НЖ Smoke Pump and ДН-17НЖ Smoke Pump are similar in their purpose and main parameters, although they have slightly different technical characteristics:

The flywheel (rotor): for 17НЖ = 670 kgf-m2, for 15НЖ = 410 kgf-m2.
Capacity: 17НЖ = 109500 m3/h, 15НЖ = 75000 m3/h.
Total pressure: у17НЖ = 457kgf-m2, at 15НЖ = 356 kgf-m2.
Power: 17НЖ = 166 kW, 15НЖ = 88.7 kW.
Length/width/height: 17H – 2285/3450/2690 mm, 15HZ – 2159/3130/2450 mm.
Weight (without engine): 17НЖ – 3 t, 15НЖ – 2.6 t.