Hazardous waste incineration rotary kiln air supply structure

Abstract

The invention relates to the technical field of hazardous waste incineration, and particularly discloses a hazardous waste incineration rotary kiln air supply structure which comprises a supporting frame, a rotary drum and a kiln head cover. The rotary drum is rotationally connected to the supporting frame, the kiln head cover is fixed to the supporting frame, the rotary drum is rotationally connected with the kiln head cover in a sealed manner, the kiln head cover is cylindrical, and a main air hole and an auxiliary air hole are formed in the side wall of the kiln head cover; and the main airhole is located in the top of the kiln head cover, the main air hole and the auxiliary air hole are not located in the same circumferential line of the kiln head cover, the main air hole is close tothe rotary drum, and the auxiliary air hole is formed in the side far away from the rotary drum. According to the air supply structure, through model simulation, the air excess coefficient of hazardous waste incineration is controlled to range from 0.8 to 1.0 to adjust the air supply amount, a rotary turbulence flow field of the scheme is obtained through calculation, the hazardous waste incineration heat ignition loss rate of a rotary kiln can be lower than 3%, and it can be seen through the scheme that on the premise that the low excess coefficient is guaranteed, the lower ignition loss ratecan also be ensured, and the combustion rate is improved.

Description

technical field [0001] The invention relates to the technical field of hazardous waste incineration, in particular to an air supply structure of a rotary kiln for hazardous waste incineration. Background technique [0002] A large amount of domestic garbage and waste are produced every day in the country. Most of these domestic garbage and waste contain toxic and harmful substances. If they are discharged indiscriminately, they will pollute the environment. Therefore, these hazardous wastes must be treated before they can be discharged. At present, the rotary kiln is mainly used to incinerate hazardous waste. The thermal ignition loss rate of the ash after hazardous waste incineration is the most powerful basis for judging whether the rotary kiln is normal or not, and can calculate the completion status of incineration. [0003] Usually, if the air passing into the rotary kiln cannot be sufficiently diffused, the formed flow field is not fully covered, and the moving speed ...

AI Technical Summary

Problems solved by technology

[0003] Usually, if the air passing into the rotary kiln cannot be sufficiently diffused, the formed flow field is not fully covered, and the moving speed along the axis of the rotary kiln is too high, etc., the thermal loss rate will increase, that is, the full combustion of hazardous waste cannot be guaranteed. The method is to increase the air supply, but this will make the excess air coefficient of the rotary kiln too high, resulting in a large loss of heat. Ensure that the thermal loss rate is within the range of 5% to 8%, and the air excess coefficient of the rotary kiln has reached 1.5 to 2.0. Therefore, it is necessary to ensure both a low thermal loss rate and a low air excess coefficient at present. Hazardous waste incineration Key research topics of rotary kiln

Images