Waste heat recycling system for ceramic kilns

Abstract

A waste heat recycling system for ceramic kilns comprises the ceramic kilns, water pipes, plate heat exchangers and slurry pipes. Heating sections of the water pipes are mounted below roll bars of slow cooling sections of the ceramic kilns, and penetrate through the ceramic kilns in a zigzag reciprocating manner, and pipelines exposed out of the ceramic kilns are wrapped by heat-insulation layers; heat exchange sections of the water pipes and the slurry pipes are subjected to heat exchange at the plate heat exchangers; the water pipes and the plate heat exchangers are subjected to countercurrent heat exchange; and distances among plates of the plate heat exchangers range from 1.5mm to 3.5mm, and the thickness of each stainless steel heat exchange plate of each plate heat exchanger ranges from 0.5mm to 1.5mm. The waste heat recycling system has the advantages that the technical difficult problem of utilizing waste heat of kilns to heat slurry is solved, and waste heat of the kilns can be sufficiently utilized in a ceramic manufacturing process owing to characteristics of the short distances among the plates, large heat exchange areas, sufficient disturbance in a water and slurry flowing procedure and extremely high heat exchange efficiency of the plate heat exchangers.

Description

technical field [0001] The invention relates to the technical field of energy saving and environmental protection in the ceramic industry, in particular to a waste heat recovery and utilization system of a ceramic kiln. Background technique [0002] Ceramics are fired at a temperature of 1200°C. The long ceramic kiln has many rollers from the entrance to the exit. The ceramic blank moves slowly on the rollers and is fired when it reaches the exit. The air heat energy in the kiln can be completely recycled, and there are currently two ways to recover the waste heat of the kiln. One is to recover hot air, such as the Chinese utility model patent whose authorized notification number is CN201152691Y, which adopts an induced draft fan to draw hot air from a kiln to dry the blank. The other is hot water recovery. For example, the invention patent application with the application publication number CN102313455A installs several water tanks on the top of the slow-cooling rear secti...

AI Technical Summary

Problems solved by technology

There are not many places where heat is used in the entire process of ceramic manufacturing. The reason why the waste heat of the kiln that is easily recovered cannot be fully utilized is because the inertial thinking of people in the field believes that hot water cannot be fully utilized in other process steps.

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