Venturi burner mouth is a combustion device that uses the Venturi effect (the speed increase and pressure decrease through the pipeline) to promote the mixing of fuel and air. Improving the mass transfer efficiency is crucial to enhance the combustion effect, reduce energy consumption and reduce emissions. Here are several ways to improve the mass transfer efficiency of the Venturi burner mouth:

1. Improve the structural design of  Venturi burner mouth

The design of the  Venturi burner mouth directly affects the mixing effect of the fuel and the air. By optimizing the geometry of the Venturi tube, the gas flow speed and mixing uniformity can be improved. For example, properly adjusting the length and angle of the contraction and diffusion segments can enhance the degree of gas turbulence, thus improving the mass transfer efficiency.

2. Increase the gas flow rate

In the Venturi burner mouth, the high-speed moving gas can drive the surrounding air more effectively, forming a good mixing effect. The gas flow rate can be increased by increasing the inlet pressure of the fuel gas or optimizing the nozzle design, thus improving the mass transfer efficiency.

3. Reduce the airflow diameter

Spliding the fuel gas into multiple small air streams can increase the contact area of the gas and air and promote more adequate mixing. Some  Venturi burner mouth designs use porous nozzles to inject fuel gas through multiple small holes to improve the mass transfer efficiency.

4. Use of external energy

In addition to optimizing the structure of the burner itself, external energy can also be used to improve the efficiency of mass transfer. For example, the use of ultrasonic vibration can break the stability layer in the air flow and promote the mixing between gases, or enhance the turbulence of the gas through the action of a magnetic field.

5. Preheat the air and the fuel

Preheating the air and fuel can increase the combustion temperature and speed up the chemical reaction rate, thus improving the mass transfer efficiency. The preheated gas has a higher kinetic energy that facilitates much faster mixing and combustion.

6. Control the air excess coefficient

Reasonable control of air excess coefficient, to ensure that the ratio of fuel and air is appropriate, can avoid incomplete combustion caused by insufficient air or heat waste caused by excessive air. By adjusting the air control valve, the precise control of the air intake amount can be achieved to optimize the mass transfer process.

To sum up, by improving the structural design of the gas flow rate, reducing the airflow diameter, using external energy, preheating air and fuel, and controlling the air excess coefficient, the mass transfer efficiency of the venturi nozzle can be effectively improved, and then, the combustion efficiency and energy utilization rate can be improved.