Water-cooled external mixing type pure oxygen gas burner for rotary iron-melting furnace

Abstract

The invention belongs to the field of casting, and relates to pure oxygen gas burners, in particular to a pure oxygen gas burner for a rotary iron-melting furnace. The front end of the burner is provided with a plurality of gas spray orifices and oxygen spray orifices which are small in equivalent diameter. Meanwhile, line clusters formed by the center lines of the gas spray orifices and line clusters formed by the center lines of the oxygen spray orifices are made to intersect in space in front of the burner. By reducing the flame length, the power density of the pure oxygen gas rotary iron-melting furnace is increased, the melting efficiency of the rotary iron-melting furnace is improved, the melting time of the rotary iron-melting furnace is shortened, fuel is saved, and the production cost is reduced. A water inlet spiral flow channel blade is arranged in a water inlet cavity and a spiral flow channel is formed in a cooling water flow channel of the burner, so that the flow speed of cooling water is greatly increased, the convection heat exchange efficiency between the cooling water and the burner is improved, cooling of the cooling water to the burner is enhanced, and thermal damage to the burner caused by high-temperature flames after the flames of the burner are shortened is prevented.

Description

technical field [0001] The invention relates to a pure oxygen gas burner, in particular to a pure oxygen gas burner used in a conversion furnace, which is used in the casting field. Background technique [0002] Rotary Transformer Furnace (abbreviated as RF in English) is a kind of cast iron melting equipment, which has a history of about 70 years of development and application in industrially developed countries. At present, the so-called rotary iron furnace refers to an iron furnace that uses gas (natural gas or liquefied petroleum gas) as fuel and pure oxygen as a combustion aid to melt cast iron. If the furnace uses natural gas as fuel, it will discharge about 40-60m3 per ton of cast iron. 3 Carbon dioxide, the carbon emission is less than 30% of the coke-fired cupola, and less than 20% of the converted value of the carbon emission of coal-fired electricity used in electric furnaces; there are no nitrogen oxides (NO x ); the amount of slag discharge is much lower than ...

AI Technical Summary

Problems solved by technology

Under the condition that the furnace length of the furnace is constant, if the power density of the furnace is increased and the thermal power of the burner is increased, if the mixing performance of the burner is poor and the flame length is long, the flame produced by the burner will break away from the furnace and charge to be heated, resulting in ineffective heating and waste of fuel

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