Segmented ceramic kiln fuel gas and air linkage control system

Abstract

The invention discloses a segmented ceramic kiln fuel gas and air linkage control system, which comprises a kiln body, an air main pipe, a fuel gas main pipe, a first thermocouple and at least three control partitions, wherein each control partition comprises an air branch pipe, an air electric valve, a flow rate meter, at least three air input pipes, a fuel gas branch pipe, a fuel gas electric valve, a flow rate meter, at least three fuel gas input pipes and a second thermocouple, the air electric valve and the flow rate meter are arranged on a connecting pipeline arranged between the air branch pipe and the air main pipe, the air input pipes are connected between the air branch pipe and an air inlet, the fuel gas electric valve and the flow rate meter are arranged on a connecting pipeline arranged between the fuel gas branch pipe and the fuel gas main pipe, the fuel gas input pipes are connected between the fuel gas branch pipe and a fuel gas inlet, the second thermocouple is used for measuring the partition temperature inside the kiln body, and a control center couples and controls the opening degree of the air electric valve according to the fuel gas flow rate data and the obtained air temperature data in the air main pipe, so the air quality flow rate data obtained by the air flow rate meter and the fuel gas quality flow rate data obtained by the fuel gas flow rate meter reach the best air-fuel ratio preset by the system.

Description

Technical field [0001] The invention relates to a ceramic kiln, in particular to a segmented ceramic kiln. Background technique [0002] At present, with the increasing demand for ceramics in the market, ceramic kilns have been built longer and wider and wider, but at the same time, the temperature in the kiln is becoming more and more difficult to control, and the uneven temperature in the kiln causes Firing defects such as deformation and chromatic aberration are becoming more and more serious. Therefore, how to uniform the temperature in the kiln and reduce the temperature difference in the section has become one of the most concerned issues for ceramic companies. [0003] Ceramic kilns often use gas as a heat source. Whether the ratio of gas to air is reasonable during combustion directly affects the energy consumption. When the amount of air is too small, the combustion is incomplete, and the products of incomplete combustion contain a lot of environmentally-polluting substa...

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Problems solved by technology

[0007] However, the technologies disclosed in the above two patents all have the following shortcomings or deficiencies: (1), using pressure sensors and programmable controllers to control the uniform temperature in the kiln by controlling the pressure of gas and air, the control effect is relatively poor , the effect of conversion between pressure and temperature is not obvious, and the reaction speed is slow

However, the energy-saving device on the ceramic kiln that can adjust the oxygen content of the hot gas in sections has the following shortcomings or deficiencies: (1), it can only automatically adjust the amount of combustion-supporting air, and cannot adjust the amount of gas at the same time, so that the gas and The air reaches the best air-fuel ratio; (2), the amount of combustion-supporting air is automatically adjusted by monitoring the oxygen content of the air, and the system cannot be automatically adjusted when the temperature of the combustion-supporting air decreases; (3), the adjustment of the combustion-supporting air volume and the amount of gas The adjustment cannot be synchronized or follow-up, which may cause cold air to blow into the kiln, affecting the combustion efficiency and even affecting the quality of ceramic products

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