What are the roles of the fans configured in the precalcining kiln system?

The firing system consists of a firing kiln tail. Firing in a kiln. The firing kiln head consists of three sub-items.

The five-stage cyclone is used with a scattering box with high diffusion and dispersion, which is conducive to reducing the exhaust gas temperature and improving the thermal efficiency. （2）.The decomposition furnace of the system adopts the first-class arrangement, and the three air flows into the decomposition furnace from the kiln head as combustion air, and the residual oxygen in the kiln exhaust gas can be increased, which is conducive to combustion; （3）.The calciner adopts the spray rotation technology, which is conducive to the internal air of the system.

Coal. The full mixing between the materials is conducive to the combustion of pulverized coal and the decomposition of materials; （4）.An adjustable damper is provided on the tertiary air duct, so that the resistance of the tertiary air duct can be adjusted and the air volume of the tertiary air path and the kiln road can be balanced; （5）.

on the quality of coal. The fluctuation adaptability of raw materials is strong, and it has the ability to control the potential to increase production; （6）.The structure of the decomposition furnace is simple, the resistance of the furnace body is small, and it is easy to arrange and operate.

A new type of sprinkling box is added to the lower pipe of the cyclone at all levels to improve the material dispersion effect, strengthen the mixing and heat exchange between the material and the air flow;

7）.The system is easy to operate, the ignition and kiln opening are fast, and the calciner can be put into use at the same time when feeding. The system adopts high-efficiency and low-resistance cyclone preheater with new technology of ** type decomposition furnace and air beam to promote grate cooler, which provides a reliable technical guarantee for ensuring high yield and low consumption to produce high-quality cement clinker.

This operation manual is limited to the production and operation of the firing system of Tongchuan Shengwei Building Materials ****5000t D new dry clinker production line.

1) The inherent systematic electromechanical and process failures of small and medium-sized kilns are relatively frequent, resulting in large dust and harsh environment in the workplace, and it is difficult to meet the harsh requirements of the precision gas analyzer for the surrounding environment. Although most of the new dry kilns are originally designed with gas analyzers in the main parts, but very few can operate normally for a long time, and some production lines simply only set up CO analyzers at the electric dust collection inlet at the end of the kiln at a lower temperature, which can only prevent the electric field accident caused by ultra-high CO content, resulting in the O2, CO, NOX and other important parts of the kiln tail, calciner outlet, preheater outlet and other important parts can not be known, and the most direct and useful information for air volume regulation is lost.

2) The whole kiln system is basically not equipped with a gas flow meter, which cannot intuitively and accurately judge the rationality of the air volume at each point, and can only rely on the wind temperature and wind pressure indirectly under normal circumstances.

3) The intact rate of system equipment is not high, and the ability of various ventilation equipment such as high-temperature fans and grate cooler fans often deviates from the nameplate identification, and the analysis and accounting of air volume is more complicated.

In the pre-calcining kiln production system, from the grate cooler to the preheater exhaust gas treatment, the fans are too familiar and have their own duties. Recognizing the role of these fans will make sense for the operation. The kiln tail dust collector fan is responsible for the residual air of the kiln system and the residual air of raw meal secretion dust collection and emission services, and is responsible for forming negative pressure for the residual air emission of the waist circumference dust collector and the kiln head dust collector fan is responsible for the residual air collection and emission service of the grate cooler, and is responsible for providing negative pressure for the residual air discharge in the middle and low sections of the grate cooler.

The kiln head coal air fan serves fuel combustion, and together with the coal wind, it becomes the disposable air of the kiln. The clinker is responsible for spraying pulverized coal from the inner and outer air ducts of the burner into the kiln. with the cooler, become the air source of the second and third winds.

The high-temperature fan of the grate cooler is the quenching of the hot end of the grate cooler, and also serves the adjustment of the negative pressure balance point of the kiln head, and is responsible for the clinker and preheating power generation in the high-temperature section to provide the required air source.