Causes of smoke from the exhaust pipe of the tunnel jet fan
The tunnel fan is a long, straight passage with kiln walls and roof fixed to the sides and top (top and top of the vault). The kiln car runs on the bottom track, and the kiln car is loaded. They learned that they used molded goods to instruct the kiln car to enter the kiln car at the kiln head and exit the kiln car at the kiln tail.
Drying medium - residual heat from the finished bricks in the oven. The drying medium is sent to the drying chamber by the blower, and the heat is transferred to the blank surface through heat exchange. After the surface of the blank is heated, the heat is transferred to the interior of the blank. Diffusion and conduction are heat transfer processes. When a blank surface is heated, the water on the surface evaporates and evaporates. Due to the different moisture content of the material, the moisture inside the blank will move to the surface and then volatilize from the surface until the blank dries, which is a heat transfer process. The heat source of the tunnel drying chamber, that is, the heat energy used for drying, is usually the hot air formed by the waste heat of the kiln brick body fired in the tunnel, which is usually called the waste heat in the furnace.
During operation, smoke and heat are separated. The complete separation of flue gas and heat means that the kiln flue gas goes directly to the flue gas treatment equipment. The waste heat in the kiln is directly used to dry the green body. The principle is the waste heat energy of kiln tail bricks. Radiates and heats the surrounding air to generate waste heat.
(No waste heat) The gas does not need to install flue gas treatment equipment, and is discharged directly after drying; the flue gas pollutants in the kiln have small air volume, high temperature, low humidity, and large consumption. Equipment should be disposed of until standard consumption is reached. In enterprises, the exhaust pipes of general drainage emit more or less black smoke (blue smoke) that does not meet the emission standards. The reason is that in a tropical climate, bricks consume less carbon, the carbon in the forging and burning area is not burned, or the calorific value of the billet is high, and the kiln in the kiln is very fast.
Therefore, there is more carbon remaining in the slab, resulting in residual carbon in the slab. The bricks in the cooling zone are still burning, which inevitably produces harmful substances such as carbon monoxide, carbon dioxide, soot and sulfates. These harmful substances mix with the water vapor in the drying chamber. When the concentration reaches a certain level, the smoke particles visible in the eyes of adults are collected and produce a continuous black smoke during the discharge process.