Oxygen-enriched combustion domestic ceramic roller kiln waste-heat utilization hot-air preheating system

The invention discloses an oxygen-enriched combustion domestic ceramic roller kiln waste-heat utilization hot-air preheating system. The oxygen-enriched combustion domestic ceramic roller kiln waste-heat utilization hot-air preheating system comprises hot air acquisition pipelines, a first conveying pipeline, an induced draft fan, a second conveying pipeline, a branch conveying pipeline, and a hot air distributor which is arranged in a roller kiln preheating zone; multiple hot air acquisition pipelines are arranged at a plurality of positions in a cooling zone kiln body of the roller kiln; the hot air acquisition pipelines are communicated with the first conveying pipeline; an inlet/outlet of the induced draft fan is communicated with the first conveying pipeline and the second conveying pipeline respectively; an outlet end of the second conveying pipeline is communicated with the hot air distributor which is arranged in the roller kiln preheating zone through the branch conveying pipeline; the hot air distributor is arranged at the upper and lower ends of a rod in the kiln; and flow regulation gates are arranged on the hot air acquisition pipelines and the branch conveying pipeline. The hot air in the cooling zone is exhausted and is uniformly conveyed to a preheating zone in the kiln through the air distributor, so that the temperature distribution on the section of the kiln is uniform, the overall heat efficiency is improved by 5-25 percent, and the fuel is saved by 5-15 percent.