Boilers are used for vaporization of liquids by passing the steam in the coils. Boilers are made by fusing number of parallel coils in a glass shell. In Boilers, coils are designed to provide bigger cross section in the shell side as compared to condensers. o The average heat transfer in Boilers is considered as 350 Kcal/m2, hr, C at a steam pressure of 3.5 bar.
| CAT. REF. | DN | DN1 | DN2 | L | L1 | TYPE | Actual H.T.A. m2 | FREE CROSS AREA CM2 | JACKET CAP. LITRE |
|---|---|---|---|---|---|---|---|---|---|
| HEB4 | 100 | 25 | 25 | 375 | 100 | A | 0.15 | 40 | 2 |
| HEB4/4 | 100 | 100 | 25 | 400 | 100 | B | 0.15 | 40 | 3 |
| HEB6 | 150 | 40 | 25 | 450 | 100 | A | 0.35 | 50 | 5 |
| HEB6/6 | 150 | 150 | 25 | 500 | 100 | B | 0.35 | 50 | 7 |
| HEB9 | 225 | 40 | 25 | 700 | 100 | A | 1.00 | 150 | 16 |
| HEB9/9 | 225 | 255 | 25 | 700 | 100 | B | 1.00 | 180 | 20 |
| HEB12/12 | 300 | 300 | 25 | 700 | 125 | B | 1.30 | 330 | 40 |
Note on use of Boilers :
- Steam should be passed in the coils at a maximum pressure of 3.5 bar which is equalant to a temperature of 147 °C.
- For higher temperature (maximum upto 200 °C) heat transfer fluids can be passed in the coils. – Cold liquids
- Cold liquids should be preheated for better results.
- Boilers should bemounted in an external circulatory loop (as shown in figure) and not direct at the bottom of flask or column
- Under certain circumstances, boilers can be mounted in series to provide larger heat transfer area.
