Mixed combustion control system of oxygen-enriched and full-oxygen combustion ceramic roller kiln

Abstract

The invention relates to a mixed combustion control system of an oxygen-rich and total-oxygen combustion ceramic roller kiln, which is composed of a pulse combustion control subsystem and a proportion combustion automatic control subsystem, and a firing curve which is determined by an upper computer (11) is simultaneously implemented; the pulse combustion control subsystem is composed of a temperature measurement sensor (17), a temperature controller (12), a function converter (13), a time sequence controller (14), a burner controller (15), an oxygen electromagnetic valve (7), a gas electromagnetic valve (8) and a pulse combustion burner (9); and the proportion combustion control subsystem is composed of an atmosphere pressure sensor (18), the upper computer (11), a gas controller (1), an oxygen controller (2), a first actuator, a second actuator, a gas valve (5) and an oxygen valve (6). The mixed combustion control system of the invention is applicable to being used in the ceramic roller kiln, can better enhance the combustion performance of the ceramic roller kiln on the whole, save the energy, reduce the emission, improve the product quality, simplify the structure and facilitate the operation simultaneously.

Description

technical field [0001] The invention relates to the technical field of industrial kiln combustion control, in particular to a mixed combustion control system for oxygen-enriched and full-oxygen combustion ceramic roller kilns. Background technique [0002] The combustion control level of industrial furnaces directly affects various indicators of production, such as product quality and energy consumption. At present, domestic ceramic kilns generally adopt the form of continuous combustion control, that is, by controlling the flow rate of fuel and combustion-supporting oxygen to make the temperature and combustion atmosphere in the furnace meet the process requirements. The continuous combustion control method is restricted by the adjustment and measurement of fuel flow, which leads to poor control effect of the kiln. At present, high-end ceramic products have high requirements on the uniformity of the temperature field in the kiln and the stability and controllability of the...

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Problems solved by technology

However, the pulse combustion control method also has its shortcomings: the intermittent action of large and small fires forms strong stirring in the entire temperature field, and is prone to dirtying due to the influence of strong stirring airflow; when the pulse period is not selected properly, it is easy to produce temperature fluctuations, The injection and combustion rate of the burner is high, and the temperature rises quickly, but it cannot meet the requirement that the temperature rise and fall of the ceramic process should be gradual, and it is easy to cause color difference in the product, thereby affecting the qualified rate of the product

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