Inbuilt Heat Exchanger Gas / Diesel Based Rectangal Batch Fryer
A Rectangular Batch
Fryer with an inbuilt heat exchanger is a high-efficiency industrial frying
system used for snacks like potato chips, namkeen, and fryums. Unlike
traditional direct-fired fryers (where a flame hits the bottom of the pan),
these systems use indirect heating.
The core advantage is
that the fuel (gas or diesel) heats a heat exchanger coil, which then warms the
oil. This prevents the oil from burning, extends its life, and reduces fuel
consumption by up to 50–55%.
Technical
Specifications (Standard Models)
Most industrial models
follow these general specifications:
|
Feature |
Standard Details |
|
Material |
Food-grade Stainless
Steel (SS 304) |
|
Fuel Options |
Diesel, Natural Gas,
LPG, or Pellets |
|
Oil Capacity |
110 – 200 Liters
(depending on pan size) |
|
Pan Dimensions |
Common sizes: 4.6' x
2.6' or 5' x 3' |
|
Production
Capacity |
40–80 kg/hr (Potato
Chips) | 100–160 kg/hr (Namkeen/Dal) |
|
Power Consumption |
3.25 HP to 5.5 HP
(for oil circulation pump & blower) |
|
Temperature
Control |
Digital PID
controller (accuracy within $\pm 1$°C) |
Key Features &
Components
- Inbuilt Heat Exchanger: A seamless SS coil furnace where the
flame is contained. The cooking oil circulates through this coil, picking
up heat without ever touching the open flame.
- Continuous Filtration: Most systems include a "Bucket
Type" filter. The oil is constantly pumped out, filtered to remove
food particles (fines), and returned to the fryer to prevent carbon
buildup.
- Insulation: The fryer body and furnace are lined with
high-density ceramic wool or glass wool to minimize heat loss and keep the
workspace cool.
- Tilting Mechanism: Many rectangular batch fryers feature a
manual or motorized tilting system to unload the entire batch at once,
ensuring uniform frying time.
- Automation: Available in Semi-Automatic and Fully
Automatic versions with auto-ignition burners.
Why use an Inbuilt
Heat Exchanger?
- Oil Quality: Indirect heating maintains a low
"film temperature," which prevents the oil from breaking down or
turning dark.
- Fuel Efficiency: The design captures more heat from the
burner compared to a traditional "Bhatti" (open furnace).
- Environment: It creates a smoke-free and significantly
cooler working environment for operators.
- Uniformity: Constant oil circulation ensures there
are no "hot spots" in the pan, resulting in consistent product
color and texture.
Applications
This type of fryer is
ideal for:
- Potato & Banana Chips (Slices stay light in color).
- Extruded Snacks (Kurkure, Nik-Naks, Pellets).
- Traditional Namkeen (Sev, Gathiya, Bhujia).
- Pulses (Moong Dal, Chana Dal).
