Zinc oxide kiln

Abstract

The invention relates to a zinc oxide kiln comprising an oxidizing chamber, a hearth, a combustion chamber, a combustor, a flue, a zinc melting boiler and an evaporation boiler, wherein the oxidizing chamber is arranged on the upper part of the kiln, the hearth is arranged below the oxidizing chamber, the combustion chamber is arranged below the hearth and is communicated with the hearth, the combustor is arranged below the combustion chamber, the flue is communicated with the hearth, the zinc melting boiler is arranged in the flue, and the evaporation boiler is arranged in the hearth and comprises a volatilization path extending to the oxidizing chamber. Zinc melted by being heated in the zinc melting boiler flows into the evaporation boiler through a guide pipe; the molten zinc which isfurther heated in the evaporation boiler is volatilized and enters the oxidizing chamber through the volatilization path; volatized zinc in the oxidizing chamber is oxidized to generate zinc oxide; and the combustion chamber forms the flaring shape gradually expanding from the combustor to the hearth.

Description

technical field [0001] The invention relates to a zinc oxide preparation device, in particular to a zinc oxide kiln. Background technique [0002] Zinc oxide furnace is a commonly used zinc oxide preparation device. figure 1 Such a zinc oxide furnace is shown in . The zinc oxide furnace includes oxidation chamber 1', oxidation chamber air inlet 2', furnace 3', inner crucible (evaporating pot) 4', outer crucible (melting zinc pot) 5', flue inlet 6', combustion chamber 7 ', flue 8', secondary air channel 9', and natural draft diffusion burner 10'. The secondary air enters the furnace 3' by infiltration, and the amount of secondary air is controlled by manually adjusting the size of the tuyere. figure 2 shown in figure 1 The schematic diagram of the burner 10' in the burner 10', the outlet of the gas pipeline is opened, and the primary air is sucked in by the gas pressure, that is, the burner 10' includes a gas inlet 11', a primary air inlet 12', and a gas-air mixture Exi...

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Problems solved by technology

[0004] (1) The shaft-shaped combustion chamber has a small combustion space, and the uneven mixing of part of the premixed air and the secondary air causes the gas to continue to burn in the furnace, which causes a large burn loss to the furnace roof and the inner crucible

[0005] (2) The structure of the naturally induced draft diffusion burner is simple, the primary air volume is difficult to control, and it is easy to lose fire; the secondary air volume is controlled by manually adjusting the size of the tuyere, resulting in an excess air coefficient α (during the fuel combustion process, the actual supply Air volume V and theoretical air requirement V 0 The ratio is called the excess air coefficient α, that is, α=V / V 0 ) is relatively large, generally α>2.5, so the heat taken away by the flue gas is very large

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