Vertical Preheater And Kiln Preheater For Lime Plant, China Vertical Preheater And Kiln Preheater For Lime Plant Manufacturers, Suppliers, Factory -AGICO Cement International Engineering Co., Ltd.

Description:

The vertical preheater is a common heat exchange equipment and one of the important components of the active lime rotary kiln system, which is mainly used to preheat the raw materials entering the lime kiln. In lime plants, vertical preheaters are usually located at the front of the kiln and are used to heat raw materials such as limestone to a certain temperature to improve calcining efficiency and save energy

Vertical Preheater System Components:

1. Upper feeding system: Includes upper silo and lower pipe for safe, sealed feeding to the preheater body. The Bar valve facilitates continuous or intermittent feeding.

2. Preheater body: Heats material to about 900°C, composed of a preheating chamber, suspension device, and refractory brick lining. Metal components, some using heat-resistant steel.

3. Push device: Consists of push head, frame, and connecting rod. Push head made of heat-resistant steel for high-temperature operation, controlled by electronic and hydraulic systems.

4. Hydraulic system: Controls the push device to execute the push action.

5. Lower feeding chamber: Preheats material for rotary kiln calcination.

6. Frame: Supports the upper structure of the preheater.

Function and Operation:

The vertical preheater utilizes kiln exhaust gas to heat materials, commonly used with active lime rotary kilns. Suitable for preheating limestone or dolomite with a rational structure, high thermal efficiency, and automation.

Operation Process:

Raw material enters the flue gas isolation cover and is evenly distributed in the annular stacking space. Hot flue gas from the rotary kiln (900-1000°C) enters the stacking space, flowing backward through the material layer for heat exchange. Preheated materials at 600°C are pushed into the kiln using push-rod disloaders for uniform feeding. Exhaust gas (300°C) is discharged into the atmosphere through the electric precipitator's smoke exhaust machine.

Specifications:

Design capability	200	225	250	300	400	500	600	800
Rotary Kiln Specifications (m)	Φ2.8x43	Φ3x50	Φ3.2x50	Φ3.3x55	Φ3.6x55	Φ3.8x58	Φ4x60	Φ4.3x60
Slope (%)	3.5	3.5	3.5	3	3	3	3	3
Internal surface area (m²)	320	390	430	490	542	570	667	725
Burning variety	Active lime	Active lime	Active lime	Active lime	Active lime	Active lime	Active lime	Active lime
Combustion temperature (℃)	1300	1300	1350	1350	1350	1350	1350	1350
Fuel	Gas/coal	Gas/pulverized coal	Gas/pulverized coal	Gas/pulverized coal	Gas/pulverized coal	Gas/pulverized coal	Gas/pulverized coal	Gas/pulverized coal
	powder
Burn-up (KJ/Kg)	5500	5400	5400	5400	5300	5250	5200	5000
preheater	quadrate	quadrate	quadrate	quadrate	polygon	polygon	polygon	polygon
Cooling unit	Vertical cooling	Vertical cooling	Vertical cooling	Vertical cooling	Vertical cooling	Vertical cooling	Vertical cooling	Vertical cooling