Preheater Suspension Plate
Suspension Plate Specification
- Product: Suspension Plate, Hanging Plate
- Steel Grade: ZG40Cr25Ni20, ZG40Cr28Ni16, ZG35Cr26Ni12Si
- Application: Cyclone Preheater Dip Tube
- Feature: Heat Resistant, Corrossion Resistant
- Production: Standard or cusomized production according to customer requirement
Preheater Suspension Plate Introduction
Preheater suspension plate (also known as hanging plate) is a key component of cement kiln cyclone preheater system, mainly used to optimize gas-solid separation, improve heat exchange efficiency and prevent material short circuit. Through special structural design, it ensures stable operation of equipment under high temperature and high corrosion conditions, and is widely used in cement, metallurgy, chemical industry and other fields. The preheater suspension plate plays a vital role in maintaining the structural integrity and proper functioning of the preheater by securely holding internal components like the dip tube in place.
What is Dip Tube-Cyclone Cylinder?
The cylinder is the main part of the preheater cyclone, usually made of high temperature resistant materials. It has sufficient strength and rigidity to withstand the high temperature and pressure generated during the preheating process. The shape of the cylinder is usually cylindrical, with a large internal space, which can accommodate a large amount of materials for preheating.
Role of Suspension Plate for Preheater Dip Tube
- Efficient gas-solid separation: By changing the trajectory of the airflow, the raw material particles are separated by inertia, and then intercepted and slide into the discharge pipe; the escape of fine powder is reduced, and the separation efficiency of the cyclone is improved.
- Strengthen heat exchange: increase the gas-solid contact area, extend the material residence time, and reduce the subsequent calcination energy consumption; the high-temperature airflow fully exchanges heat with the raw material, and the preheating efficiency is increased by more than 20%.
- Prevent material short circuit: guide the material to move along the predetermined path to avoid insufficient heat exchange.
Choose Suspension Plate Type and Size for C1-C5 Cyclone Dip Tube
NC-3166 Suspension Plate
NC-3180 Suspension Plate
S236x185 Suspension Plate
S236x335 Suspension Plate
S236x585 Suspension Plate
S236x760 Suspension Plate
- The working temperature of C1 cyclone is about 300℃, which is relatively low and not easy to be damaged, so it is generally adopted as an integral cylinder structure.
- C2, C3 inner cylinder C2, C3 inner cylinder is a suspension plate cylinder structure. The temperature inside C2 and C3 cyclone is between 550~750℃, and the inner cylinder is more likely to be damaged by heat corrosion, and needs to be replaced periodically.
- C4, C5 inner cylinder C4 and C5 cyclone inner cylinders are usually inlaid with small suspension plates. The working temperature inside C4 and C5 cyclone increases to 750~1150℃, and the working environment is harsh. High temperature and alkaline environment can easily cause the inner cylinder to corrode and deform. For this reason, C4 and C5 inner cylinders adopt inlaid heat-resistant steel casting small suspension plate structure, which is convenient for irregular replacement.
How to Select Suspension Plate Material
| Preheater Cyclone level | Recommended materials | Heat resistance | Corrosion resistance | Applicable scenarios |
|---|---|---|---|---|
| C1 | 16Mn | ≤300℃ | generally | Low temperature environment |
| C2/C3 | 0Cr18Ni9 (304 stainless steel) | 550-750℃ | Anti-oxidation, weak corrosion | Medium temperature, suspended slice structure |
| C4/C5 | ZG40Cr25Ni20 | 750-1150℃ | Resistant to high temperature oxidation and strong corrosion | High temperature alkaline environment, embedded small suspension plate |
Material advantages: ZG40Cr25Ni20, ZG40Cr28Ni16 are temperature resistant up to 1150°C, resistant to sulfide and chloride corrosion, and suitable for extreme working conditions.
ZG35Cr26Ni12Si is suitable for working environments with relatively low temperatures and weak corrosive media.
Installation Of Suspension Plate for Different Preheater Cyclones
The general requirement is that after installation, the overall shape should be a perfect cylinder with uniform gaps (no zero gap or excessive gap). Use special fastening tools to ensure that the suspension plate fits tightly against the cylinder wall. Here are the tips for installation of suspension plates in different cyclones.
| Preheater level | Structural form | Installation Requirements |
|---|---|---|
| C1 | Overall cylindrical structure | Check the bracket positioning dimensions to ensure the center of the cylinder is aligned |
| C2/C3 | Large suspension plate | The circumferential gap is 3-5mm, avoiding extrusion or excessive gaps, and the suspension plate is vertical and flat |
| C4/C5 | Inlaid small suspension plate | Check the hooks regularly to allow space for thermal expansion, control the longitudinal gap, and allow space for thermal expansion. |
Suspension Plate Maintenance Tips
- Clean up the dust and coke, monitor the wear and tear, and replace the damaged suspension plate in time.
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Process improvement
- Spray wear-resistant coating (such as tungsten carbide) on the surface to extend service life.
- Optimize the geometry of the suspension plate to enhance impact resistance and load-bearing capacity. - Avoid violent air flow fluctuations or material collapse to prevent the hook from falling off or the inner tube from deforming.