Large-section high-efficiency energy-saving type gas tunnel kiln

Abstract

The invention provides a large-section high-efficiency energy-saving type gas tunnel kiln comprising a burner, a preheating zone, a firing zone and a cooling zone; the width and the height of the cross section of the inner part of the tunnel kiln is (1800mm-3500mm)*(1000mm-1500mm). The top end of the interior of the preheating zone is a flat top, and the top end of the interior of the firing zone is an arched structure. The arched top in the firing zone is provided with a plurality of baffles for stopping the hot airflow accelerating forwards along the inner height of the arched top. The invention further improves the radiating structure and the like of the burner and the cooling zone. Compared with the original tunnel kiln, the energy is saved by 29.3%, so the gas tunnel kiln is beneficial to controlling the firing cost to be lower than 30%, thereby greatly enhancing energy utilization ratio; in addition; the wide tunnel kiln has the advantages of high heat producing efficiency, multi-variable coupling intelligent control, high system response speed, convenience in operation of whole machine, fitness in high-temperature combustion-supporting, and the like, so that the gas tunnel kiln is beneficial to enhancing the product firing qualified rate and the firing quality.

Description

technical field [0001] The invention relates to the technical field of daily-use pottery tunnel kilns, in particular to a large-section high-efficiency and energy-saving gas tunnel kiln. Background technique [0002] my country is a big country in ceramics production, and the output of daily-use ceramics and sanitary ceramics both ranks first in the world. However, the energy utilization efficiency of China's ceramic industry is generally low, and the gap is relatively low. The energy utilization efficiency only reaches 28% to 30%. The average energy consumption of the firing process of the tunnel kiln is 29271-39725KJ / Kg porcelain, while the average level of advanced countries is only 12549-39725KJ / Kg porcelain, and the energy consumption of the firing process is only about half of that of my country. The energy consumption level of the kiln mainly depends on the kiln structure and firing technology. The structural design, firing technology and waste heat utilization of ex...

AI Technical Summary

Problems solved by technology

[0006] In the cooling of products in the tunnel kiln cooling zone, at present, the heat dissipation on the surface of the refractory material of the kiln body is basically used to achieve the purpose of cooling down. In this way, the length of the cooling zone is extended to increase the kiln length; or the driving speed is reduced to reduce production. Increase energy consumption per unit of product. On the other hand, there is also a method of forced cooling, that is, directly extracting hot air into the kiln, which interferes with the air flow in the kiln and affects firing.

Images