Diffusion type porous medium burner

Abstract

The invention provides a diffusion type porous medium burner, and relates to the technical field of porous medium burning. The burner comprises a burner body, a thermocouple, a sparking electrode anda detection electrode, wherein the body comprises an outer shell, an inner shell and an air inlet channel, and the inner shell is inserted into a first cavity of the outer shell; a second cavity whichcommunicates with the first cavity and is coaxial with the first cavity is formed in the inner shell; an air distribution plate and a gas distribution plate are arranged in the axial direction of thesecond cavity in sequence; a first big-hole foam ceramic plate, a small-hole foam ceramic plate and a second big-hole foam ceramic plate are arranged in the first cavity and in the downstream area ofthe end surface of the gas distribution plate; and the air inlet channel comprises a gas inlet, an air inlet, an air conduit and a gas conduit, the gas inlet communicates with the gas distribution plate through the gas conduit which passes through the air distribution plate, and the air inlet communicates with the air distribution plate through the air conduit. The burner has the functions of effectively preventing from tempering, conveniently monitoring flame, predicting and diagnosing the service condition of porous medium materials.

Description

technical field [0001] The invention relates to the technical field of porous media combustion, in particular to a diffusion type porous media burner. Background technique [0002] In my country's energy structure, the proportion of clean energy such as natural gas, hydropower, and nuclear power is quite small, far below the world average level, and clean energy such as natural gas has a large room for development in my country. Blast furnace gas, coal mine gas and other low calorific value gases have less combustible components and low calorific value. Under the traditional free flame combustion conditions, it is difficult to control ignition, combustion is very difficult, easy to temper and blow out, and is often directly discharged into the atmosphere as tail gas middle. This not only causes waste of energy, but also contributes to the greenhouse effect due to the presence of methane. Therefore, it is particularly important to improve and develop combustion technology t...

AI Technical Summary

Problems solved by technology

[0010] (2) The electrode detection combustion flame signal has hysteresis

Therefore, when the porous media burner uses low calorific value gas as fuel, the flame signal detected by the electrodes has hysteresis, and the lag time varies with the porous media material and the type of gas, which is a deficiency in the existing porous media burner

[0012] (3) It is impossible to predict or diagnose the usage of porous media materials based on real-time usage

However, the existing porous media burner cannot meet this diagnostic requirement structurally.

[0014] (4) When the burner air and gas are preheated, the real-time working conditions cannot be monitored

In the actual process, heat exchangers are generally used for gas preheating, and the heat source is combustion exhaust gas. However, the current design level of heat exchangers generally cannot achieve precise temperature control, and combustion exhaust gases may fluctuate at any time. These factors will lead to The preheated gas of the heater cannot reach or exceed the design temperature, and a safety accident occurs

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