miniCAST 6200

Features

Configuration

Specifications

miniCAST 5200

Features

Configuration

Specifications

HiMass 7200

Features

Specifications

De-Vigier Fond.

Every burner on the CAST basis is able to generate soot with either diffusion or premixed flame. In order to operate with a premixed flame the fuel gas is actually mixed with oxidizer such as air or oxygen before it is served to the burner. 

In comparison to a diffusion flame, carbon and soot particles formed in a premixed flame also meet the oxidizer within a flame and react with them. As a result, small soot particles and lower mass output are generally expected from a premixed flame. Obviously, the soot particles and the mass output will grow when the oxygen content in the fuel gas reduces and the flame becomes a diffusion flame.

In combustion, a diffusion flame is a flame in which the oxidizer, in our case the oxygen in the air combines with the fuel by diffusion. As a result, the flame speed is limited by the rate of diffusion. Diffusion flames tend to burn slower and to produce more soot than premixed flames because  there is not sufficient oxidizer within the flame.

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A premixed flame is a flame in which the oxidizer has been mixed with the fuel before it reaches the flame front. This creates a thin flame front as all of the reactants are readily available. If the mixture is rich, a diffusion flame will generally be found further downstream.

Different flame types of Bunsen Burner depending on air flow through the valve

1. valve closed

2. valve semi-opened

3. valve nearly fully opened

4. valve fully opened

(source: Wikipedia)