A self-controlled high-efficiency multi-oxygen combustion ultra-low emission industrial kiln and its use method

Abstract

The invention provides an automatic control efficient multi-oxygen combustion ultra-low emission industrial kiln. The industrial kiln is provided with a kiln hole, a kiln vehicle, kiln vehicle operation tracks and driving mechanisms. The kiln hole is in an approximate prism shape and provided a first branch hole and a second branch hole, a first connection hole and a second connection hole are formed, and the kiln vehicle operation tracks which communicate mutually and the driving mechanisms are arranged in the branch holes and the connection holes correspondingly. A preheating zone, a firingzone and a cooling zone are sequentially arranged in the first branch hole. A blank feeding zone 7, a drying zone 2 and a separation zone 8 are arranged in the second branch hole. A first kiln vehicletrack transfer mechanism is arranged in the first connection hole, a second kiln vehicle track transfer mechanism is arranged in the second connection hole, a first induced draft fan and a second induced draft fan are further arranged, and a fuel gas pipe, a fuel gas spray head, a combustion-supporting gas pipe, a combustion-supporting gas spray head and an igniter are arranged in the firing zone. Compared with a conventional combustion method, flue gas emission is reduced by 70% or more, flue gas basically contains no nitric oxide, energy consumption is reduced, the heat utilization rate ishigh, the heating firing efficiency and the product production efficiency are improved, the energy conservation and environment protection effect is good, gas fuel consumption is reduced, the purposesof energy conservation and environment protection are achieved, automatic control is flexible, and the operation cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of industrial kilns, and in particular relates to a self-controlled high-efficiency multi-oxygen combustion ultra-low emission industrial kiln and a use method thereof. Background technique [0002] The industrial kiln is the most important continuous firing equipment in the sintering brick and tile industry. Its main body is a sealed cave dwelling that can withstand high-temperature baking composed of various building materials, refractory materials, and thermal insulation materials. The kiln car passes through the cave in turn, and at the same time, it is heated, roasted and cooled in a suitable thermal environment, and finally a sintered product with stable performance is obtained. [0003] The traditional industrial kiln is a thermal equipment operated in countercurrent, and is divided into a preheating zone, a firing zone, and a cooling zone along the length of the kiln. The product and the airflow mov...

AI Technical Summary

Problems solved by technology

[0004] The shortcomings of traditional industrial kilns: 1. The length of the preheating section is too long

The fired billet must be cooled down to the kiln exit temperature in the cooling section, and the cooling speed should not be too fast, otherwise it will affect the quality of the product, so the cooling section is required to have a sufficient length; 3. Heat loss in the preheating section More, lower thermal efficiency

Although the hot air exchanged by cooling in the preheating section can be transported to the preheating section through the thermal circulation system to dry the wet billet, but due to the enlarged span and system loss, the heat consumption will be large

In addition, the traditional tunnel kiln has the disadvantage of inaccurate gas delivery, which can easily cause brick adobes to be overfired, agglomerated or sandwiched, which affects product sales and seriously affects corporate income.

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