Limestone Calcination Equipment Vertical Preheater Large Scale
Convenient Maintenance
Vertical Preheater Introduction:
The vertical preheater is a vertical preheating device that preheat calcined material,
it’s developed on the basis of import and absorb advance technology
from abroad and combine with dolomite and limestone calcination
features, with characteristics such as rational structure, high
rate of heat exchange, high level of automatic. It main used to
preheat raw material with poor thermal stability (such as
limestone, dolomite and so on). The vertical preheater is used with
rotary kiln, make the high temperature air from kiln tail fully
utilize, play a role in saving energy and reducing consumption,
it’s a energy saving and environment - friendly product.
Vertical Preheater Structure:
Vertical preheater is consist of upper feeding system, suspended
ceiling device, main body, pusher system, hydraulic system and so
on. Concrete structure such as below drawing. The characteristics
of each sub-system is:
1. Upper feeding system
It main include upper hopper, discharge chute, hopper legs and so
on, its main role is to ensure complete sealing when feeding
materials into main body of preheater, and avoid cool air enter
into preheater.
2. Suspended ceiling device
Its main role is bearing the weight of hanger bricks.
3. Main body of preheater
The main body of preheater is consist of preheating room, hanger
device and so on, it’s the key part of ensuring materials preheated
more than 800℃.
4. Pusher system
Include push head, liner support frame and so on, to ensure push
materials steady, reliable and accurate.
5. Hydraulic system
Include oil box, oil pump, motor, electro magnetic valve, hydraulic
oil tube and so on, it’s main used to control pusher device,
complete push action.
6. Bottom feed hopper
Include feed hopper and so on, its main used to import preheated
materials into rotary kiln by transfer chute for calcination.
7. Recycle system
Include dust collection silo, recycle slide pipe and so on.
Our Advantages of Dolomite Vertical Preheater:
1. Push head and main parts of body is made of heat resistance
steel, so it can work in 1000~1100℃ high temperature, and have long
operation life.
2. Effectively recycle heating energy in waste gas from kiln inlet,
to insure the material is preheated equally and reach to preheating
temperature.
3. Recycle the heat energy in waste air that discharge from kiln
tail effective, increase utilization ratio of fuel, at the same
time, it’s benefit to dedust;
4. The vertical preheater is used in calcination system, the length
of rotary kiln will be shorten, to reduce the heat loss on the
surface of rotary kiln and floor space;
5. With good combined revenues, the capacity will be increased 30%,
thermal efficiency will be increased 40% after use vertical
preheater.
Vertical Preheater Specifications:
| Model | No. of push rod | Body height(m) | Capacity(t/d) | Feeding size(mm) |
| YRQ-04 | 4 | 4 | 200 | 10～50 |
| YRQ-06 | 6 | 4 | 300 | 10～50 |
| YRQ-08 | 8 | 4.4 | 400 | 10～50 |
| YRQ-12 | 12 | 4.4 | 600 | 10～50 |
