Flue Gas Heat Exchanger for Diesel Thermal Oil Boilers

Flue Gas Heat Exchanger for Diesel Thermal Oil Boilers

The information provided by the customer is as follows:

I need flue gas heat exchanger for diesel fuelled thermal oil boiler.

Air mass flow rate of 832 kg/h.

The air used is at ambient temperature, about 15°C.

where the outlet temperature of the flue gas is 203°C.

The flue gas heat exchanger is a device for recovering waste heat from the flue gas of a thermal oil boiler. It works by exchanging heat between the flue gas and the thermal oil, thereby transferring the heat energy from the flue gas to the thermal oil to improve the energy efficiency of the thermal oil boiler.

A flue gas heat exchanger typically includes the following major components and functions:

1. flue gas inlet: directs the flue gas from the thermal oil boiler into the heat exchanger.

2. flue gas passage: the flue gas flows inside the heat exchanger and exchanges heat with the thermal oil.

3. hot oil inlet and outlet: hot oil enters the heat exchanger through the inlet, where it comes into contact with the flue gases and absorbs heat, and then returns to the hot oil boiler through the outlet.

4. Cooling medium (usually water): Sometimes, in order to further improve energy efficiency, a cooling medium can be used to cool the flue gases and thus extract more heat. Such systems are called flue gas coolers or economisers.

The main objective of the flue gas heat exchanger is to reduce the flue gas discharge temperature and at the same time increase the thermal efficiency of the thermal oil boiler. By recovering the waste heat from the flue gas, energy waste can be reduced, operating costs can be lowered, and the negative impact on the environment can be minimised. Therefore, the use of flue gas heat exchangers in diesel thermal oil boiler systems is a common practice, especially in applications that require efficient energy utilisation, such as industrial production and HVAC systems.