The series of sludge hollow blade dryers consists of two interlocked blade shafts, a W-shaped shell with a jacket, a machine base, and a transmission part. The entire drying process of sludge is carried out in a closed state, and organic volatile gases and odorous gases are sent to the exhaust gas treatment device in a sealed atmosphere to avoid environmental pollution.
2、 Parameters and requirements provided by customers for sludge hollow blade dryer
1. Material name: Sludge
2. Initial moisture content: 85%
3. Final moisture content: 30%
4. Processing capacity: 200Kg/day (8h)
5. Heat source: saturated steam
6. Equipment material: 304 stainless steel at the material contact point
3、 Calculation and selection of sludge drying process for hollow slurry blade dryer
1. Dry product yield: G=5.3kg/h
2. Water evaporation rate: W=19.7kg/h
3. Feed temperature: set at 15 ℃ (annual average)
Discharge temperature: 75 ℃
4. System heat consumption: Q (kcal/h)
Q=heat consumed by evaporating water, Q1=heat carried away by the product, Q3=heat loss (15%)
Q1=W[r+( T2- T1). ζ1]=12000Kcal/h
R is the latent heat of vaporization of water 557 Zeta 1 is the specific heat of water 1
Q2= G( T2- T1)[(1- M2) .ζ+ M2ζ1]=160Kcal/h
Q3= (Q1+ Q2)×0.15=1800Kcal/h
Q= Q1+ Q2+ Q3= 13960Kcal/h
5. Selection:
Select one KJG-5 hollow blade dryer with a heat exchange area of 5m2, which can meet the production requirements
6. Equipment energy consumption:
Daily working hours: 6-8 hours
Steam consumption per hour: 30kg
Hourly electricity consumption: 4.5Kw. h