Hot-blast air combustion-supporting intelligent control system for roller bed kiln furnace

Abstract

The invention relates to a hot-blast air combustion-supporting intelligent control system for a roller bed kiln furnace. The hot-blast air combustion-supporting intelligent control system comprises an induced draught section pipeline, a heat exchange section pipeline and a combustion-supporting air pipeline, wherein the induced draught section pipeline comprises a tail cooling fan and an axial flow fan; the tail cooling fan and the axial flow fan are connected with a plurality of air draft hoods by a pipeline; the air draft hoods are connected with a draught fan by the pipeline; the outlet end of the draught fan is divided into a first pipeline and a second pipeline; the first pipeline is connected with a combustion-supporting fan by a positive pressure pipe; the second pipeline is connected with the heat exchange section pipeline by an air inlet pipe; the air inlet pipe is divided with a third pipeline and a fourth pipeline; the third pipeline is connected with an indirect heat exchange pipeline; the fourth pipeline is connected with a direct heat exchange pipeline; the indirect heat exchange pipeline and the direct heat exchange pipeline are connected with the combustion-supporting fan by a negative pressure pipe; the combustion-supporting fan is connected with the combustion-supporting air pipeline; and the combustion-supporting air pipeline is provided with a burner. The hot-blast air combustion-supporting intelligent control system has the advantages that the temperature of combustion-supporting air of the burner is raised to above 200 DEG C under the condition that normal production is not influenced, and the consumption of fuel of the roller bed kiln furnace is reduced.

Description

technical field [0001] The invention relates to the field of manufacturing equipment for ceramic building decoration materials. Background technique [0002] Most of the combustion-supporting air source of the existing ceramic roller kiln burners is the direct use of air, but it has been proved from theory and practice that increasing the temperature of the combustion-supporting air can effectively save the fuel consumption of the kiln. In the industry, many roller kilns have undergone transformation projects for combustion-supporting air heating. The first generation of hot air combustion-supporting system was relatively simple, that is, the combustion-supporting fan directly extracts the waste heat flue gas from the kiln waste heat main pipe, and at the same time cooperates with the cold air outlet to inhale cold air into the combustion-supporting air pipeline. As a result, the temperature of the combustion-supporting air is not high, generally below 100° . The second-ge...

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Problems solved by technology

The second-generation hot air combustion-supporting system developed in recent years has made some progress compared with the first generation. The waste heat flue gas is extracted from the waste heat main pipe of the kiln through the heat extraction fan, and at the same time, the cold air is sucked into the quenching high-temperature box by the cold air port for indirect replacement. Heat, the temperature of the combustion-supporting air has increased, generally around 150°, but in the process of indirect heat exchange, the resistance of the flue gas to pass through the indirect cooling tube is relatively large, which reduces the pressure of the combustion-supporting air and causes a certain temperature difference on the kiln section. influences

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