Gujarat Heavy Chemicals Ltd (India)

From Efficiency Finder
Jump to: navigation, search

Back to EFFICIENCY FINDER FOR CHEMICAL INDUSTRY

Back to Information about organic pigments and dyes


Visit Report to M/s.Gujarat Heavy Chemicals Ltd.

Nemeli Road, Tiruporur, Kanchipuram Dist. 603 110. Tamilnadu, India

Date : 19/06/2003.
Product used for drying = Salt
Source used for drying = Thermic Fluid
Name of the fuel used = Furnace oil
Fuel used per hour = 100 litres ( as per report)
Fuel used per hour = 135 - 150 litres (as per personal enquiry)
Fuel used per day = 2400 litres
Fuel used per year = 640 kilo litres
Approximate cost of Fuel = Rs.13.25/litres
Method of drying = FBD (Fluidised Bed Drying)
Capacity of drier = 15 tonnes
Initial moisture of the product = 4.5%
Final moisture of the product = 0.13%
Annual production = around 75,000 mt
Capacity of heating system = 15 lakh Kcals/hr.
Total shifts = 3 shifts (24 hr.)
Tilting angle of factory = 11o SE (south towards east)


Total blowers used for drying = 2 Nos.
Main Heating Blower = 1 no Exhaust Blower = 1 no


Main Heating Blower specification
Blower power = 75 HP
Measured Current & Voltage = 72.5A, 420V


Volume flow of the main blower (measured at blower suction side)
Circumference of the pipe = 1.63m (diameter of the pipe = 0.52m)
Cross sectional area of the pipe = 0.212m2
Average velocity of the air = 22.85 m/s
Volume flow of the air = 17,500 CMH
Blower suction pressure = 57 mm of H2O


Volume flow measured at blower delivery side
Cold air delivery for cooling chamber
Delivery pressure at cold air passage = 635 mm of H2O
Circumference of the pipe = 1.63m (diameter of the pipe = 0.52m)
Cross sectional area of the pipe = 0.212m2
Average velocity of the air = 5.1 m/s
Volume flow of the air = 4,000 CMH


Net volume flow of the air used for drying = [17,500 - 4,000 CMH] = 13,500 CMH
Drier inlet temperature = 2100C
Delivery pressure near thermic fluid = 596 mm of H2O heat exchanger side


Exhaust Blower Specification
Blower Power = 75 HP
Measured Current & Voltage = 57A, 420V


Thermax boiler Specification
Blower Power = 15 HP
Measured Current & Voltage = 8.7A, 420V
Thermic fluid inlet temperature = 2200C Thermic fluid outlet temperature = 270oC
Volume flow of the Exhaust blower (measured at blower suction side)
Circumference of the pipe = 1m (diameter of the pipe = 0.32m)
Cross sectional area of the pipe = 0.08m2
Average velocity of the air = 7.7 m/s
Volume flow of the air = 2,250 CMH
Blower suction pressure = 12 mm of H2O


Energy Balance for Hot Air Generation
Net volume flow of air heated from 35oC - 2100C = 13,500 CMH
Total energy required / hour
= (13,500 x 0.898*)kg. x 1 kJ x (210 – 35)
= 21,21,525 kJ
= 5,07,542 kilo cal.
Density of air at a temperature 1250C - average of 350C & 2100C


Solar Energy Contribution to heat the air from 350C - 1050C 
Energy delivery = (13,500 x 0.999*)kg. x 1 kJ x (105 – 35) = 9,44,055 kJ = 2,25,850 kilo cal.
Density of air at a temperature 700C - average of 350C & 1050C


The percentage of energy savings through solar heating = 44.4%


Fuel Savings (assuming 100 litres/hr)
The average fuel savings per day = 100 litres x 0.444 x 7 hr. = 311 litres
The average fuel savings per year = 311 litres x 300 days = 93,300 litres
Fuel savings cost per year = Rs12,12,900/-


Assuming 135 litres/hr The average fuel savings per day = 135 litres x 0.444 x 7 hr. = 420 litres
The average fuel savings per year = 420 litres x 300 days = 1,26,000 litres
Fuel savings cost per year = Rs16,38,000/-



Back to EFFICIENCY FINDER FOR CHEMICAL INDUSTRY

Back to Information about organic pigments and dyes