A combustion beam for lime kiln with air cooling device

Abstract

The invention provides a combustion beam provided with an air cooling device and used for a lime kiln. The combustion beam comprises a beam body, and a fuel pipeline and a burner which are located in the beam body, wherein an air channel is limited by the beam body; the burner comprises a fuel burner arranged on the fuel pipeline, and a combustion-supporting air pipeline which is arranged on the position, corresponding to a fuel nozzle, of the beam body and is communicated with the air pipeline; a cooling air pipeline is formed in the upper side or the periphery of the beam body and is communicated with the air channel; sprayed air can be used for effectively cooling a top wall of the beam body and preventing high-temperature flame from being in direct contact with the part, particularly the crossed part of a bottom side plate of the top wall of the beam body, so that the ablation effect is reduced; furthermore, the brushing effect on the top wall of the combustion beam by particles clamped in the airflow sprayed out from the burner can be weakened so that the service life of the combustion beam is prolonged; the cooling air pipeline is easy to machine and the total structure size of the combustion beam is not changed; a mounting hole in the combustion beam of an existing kiln body does not need to be adjusted and the combustion beam can be directly mounted on the existing kiln body.

Description

technical field [0001] The invention belongs to the technical field of combustion equipment, and relates to a combustion beam for a lime kiln, in particular to a combustion beam with an air cooling device. Background technique [0002] The beam type lime kiln has a series of advantages such as low cost, low energy consumption, strong production capacity, large working flexibility and wide fuel adaptability, and is widely used in lime production for metallurgy, chemical industry and other purposes. When using a beam-type lime kiln for lime production, raw materials such as limestone fall from the top of the kiln, pass through the preheating zone, calcination zone, and cooling zone in the kiln body in sequence, and finally output from the discharge port at the bottom of the kiln. The decomposition temperature of limestone is about 900°C, and the calcination temperature is between 1000°C and 1200°C, and the calcination is mainly completed in the calcination area with a higher t...

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Problems solved by technology

Both of the above-mentioned patents have the following problems: it is difficult to reliably install the high-temperature wear-resistant heat insulation layer or the wear-resistant layer on the combustion beam body; The size of the installation hole of the combustion beam on the existing kiln body is adjusted; the processing of the high temperature and wear-resistant heat insulation layer or the wear-resistant layer is relatively difficult; the materials, processing and installation costs of the high-temperature and wear-resistant heat insulation layer or the wear-resistant layer are compared High; there is a risk that the entire combustion beam needs to be repaired or replaced after the high temperature and wear-resistant insulation layer or the wear-resistant layer is partially damaged

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