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Weld Preheater Heat Exchange Performance, Reduce Energy Consumption

Weld preheater is the use of flue gas in the tail of the boiler through the internal heat sink will enter the boiler before the air preheated to a certain temperature heating surface. Used to improve the boiler heat exchange performance, reduce energy consumption. Vertical Weld preheater has become an important equipment in the cement production line. The quality and operation of the Weld preheater are directly related to the quality, efficiency and cost of the cement calcination. Therefore.

The main role of the Weld preheater.

The Weld preheater is one of the main equipment of the cement equipment. The main function of the cement Weld preheater is to send the upper limestone material to the Weld preheater body and use the high temperature exhaust gas (850 ℃) discharged from the kiln after calcination. The Weld preheater will preheat the material evenly above 800 ° C. During the preheating process, 30% CaCO3 is decomposed in the Weld preheater and then pushed into the Weld preheater by the hydraulic fader. This calcination process not only makes Limestone calcined in the kiln greatly shorten the time, but also to obtain a higher activity of lime.

The preheating is a device that is outside the kiln, and the cooling is a separate device outside the kiln head. The Weld preheater is a heat exchange device that causes the temperature of the exhaust gas to drop rapidly and the temperature of the raw material powder rises rapidly, thus reducing the heat Consumption, improve production and quality, energy conservation, comprehensive utilization. For example, the suspension Weld preheater, which is characterized by dry raw powder and rotary kiln hot gas, in the suspended state for heat exchange. In the suspension Weld preheater, the raw material powder is evenly dispersed in the airflow, the surface of the raw material powder particles directly contact with the hot air, heat exchange area is very large, the heat transfer effect is good. Moreover, because the raw material particles are small, the heat quickly spread from the surface to the center. Therefore, the heat transfer rate is also very fast, raw materials in the tens of seconds can be increased from room temperature to 750 ゜ C above. Since the suspension Weld preheater is a highly efficient heat exchange device, this kiln type of heat consumption is very low, only 3140 ~ 3560 kJ / kg clinker.

The Weld preheater is one of the main equipment of the cement equipment. The main function of the cement Weld preheater is to send the upper limestone material to the Weld preheater body and use the high temperature exhaust gas (850 ℃) discharged from the kiln after calcination. The Weld preheater will preheat the material evenly above 800 ° C. During the preheating process, 30% CaCO3 is decomposed in the Weld preheater and then pushed into the Weld preheater by the hydraulic fader. This calcination process not only makes Limestone calcined in the kiln greatly shorten the time, but also to obtain a higher activity of lime.

The preheating is a device that is outside the kiln, and the cooling is a separate device outside the kiln head. The Weld preheater is a heat exchange device that causes the temperature of the exhaust gas to drop rapidly and the temperature of the raw material powder rises rapidly, thus reducing the heat Consumption, improve production and quality, energy conservation, comprehensive utilization. For example, the suspension Weld preheater, which is characterized by dry raw powder and rotary kiln hot gas, in the suspended state for heat exchange. In the suspension Weld preheater, the raw material powder is evenly dispersed in the airflow, the surface of the raw material powder particles directly contact with the hot air, heat exchange area is very large, the heat transfer effect is good. Moreover, because the raw material particles are small, the heat quickly spread from the surface to the center. Therefore, the heat transfer rate is also very fast, raw materials in the tens of seconds can be increased from room temperature to 750 ゜ C above. Since the suspension Weld preheater is a highly efficient heat exchange device, this kiln type of heat consumption is very low, only 3140 ~ 3560 kJ / kg clinker.


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