Industrial Water Heating

Preheating Boiler Feed Water

M/s. Prara Leathers Pvt Ltd, Ranipet processes finished leather. The company uses hot water generated in an insulated storage tank of capacity 25 KL using steam mixing.
A 3 ton thermax boiler is used to produce steam using firewood at the rate of 250 – 280 kg/hr. A solenoid valve system fitted with steam is used to control the water temperature to 65℃ in the 25 KL tank.
As the site receives solar radiations for more than 300 days/year, SUN BEST had installed a roof mounted Evacuated Tubes Collectors (ETC) system of capacity 50,000 – 60000 LPD solar water heaters to reduce firewood consumption in the boiler as well as to promote clean energy in leather processing.
196 ETC collectors are divided into four groups and fitted on the roof of the factory.
Each 49 x 2 Nos ETCs are connected in a primary loop with expansion tank, pump, auto refilling water and a plate heat exchanger.

196 ETC collectors are divided into four groups and fitted on the roof of the factory.
Each 49 x 2 Nos ETCs are connected in a primary loop with expansion tank, pump, auto refilling water and a plate heat exchanger.
The secondary loop consisted of cold storage water and pump coupled to the plate heat exchanger. The primary loop works at a temperature of 75-80℃.
The cold water passes through the PHE and gets heated up to a temperature of 65℃ and it is taken to the process.

The system saves: