Views: 7863 Author: Site Editor Publish Time: 2013-10-15 Origin: Site
Signed Date: 2013-10-15
Handling material: Limestone
Handling capacity: 150 tons per day
Equipment configuration: rotary kiln, vertical preheater, bucket elevator
I. Project overview:
The project is located in Uzbekistan, it is a lime production line with a daily output of 150 tons. In October 2013, the customer visited our company and signed a supply contract for vertical preheater and bucket elevator kiln. The production line was rebuilt from an old rotary kiln (φ2.5×40 meters) and calcined limestone. Now the contract is in the guidance installation phase.
II. Solution:
(1) Raw material storage and transportation of limestone with particle size of 10 ~ 50mm is transported to the factory area and stacked in the material yard, and the material yard operation uses loaders. The material with qualified particle size is loaded into the receiving trough set up in the material yard by the loader, the receiving trough is fed quantitatively by the feeder, the stone is fed to the high Angle conveyor, and then sent to the screening building. After the qualified particle size of the limestone is screened, it is weighed by the high Angle conveyor and sent to the top silo of the preheater. The powder under the screen is sent to the storage yard by the conveyor and is carried out by the forklift regularly.
(2) Limestone calcining Limestone calcining is composed of vertical preheater + rotary kiln + vertical cooler, the output is 100~800t/d, the material from the top of the preheater bin through the feed chute into the preheater body, while the high temperature flue gas from the rotary kiln preheats the material to more than 1000℃, causing partial decomposition of limestone. Then the hydraulic push rod is successively pushed into the tail of the rotary kiln, after the high temperature calcination of the rotary kiln, it is discharged into the cooler, and the cold air blown into the fan is cooled, and the material is cooled to the ambient temperature below +60℃. The air blown in by the cooler enters the rotary kiln as secondary air to participate in combustion.
(3) Finished product transportation Finished lime is unloaded from the cooler through the chain plate conveyor, bucket elevator, belt conveyor to the finished lime warehouse. The discharge valve under the lime storage bin is used to load the lime in the bin into the car and the tank car before being transported out. Set up different size silos according to customer reserve requirements. The finished product silo adopts circular silo, with 2 finished products silos of 5~50mm and 1 finished product silo of <5mm. The quantity of each silo is about 800t.
(4) Flue gas treatment The high-temperature flue gas produced by the combustion of rotary kiln, after heat exchange with limestone in the preheater, the temperature drops below 250℃, and then it is carried out into the cyclone dust collector for the first stage of dust collection, the large particles of dust are captured, and then into the bag dust collector, after the dust is discharged into the atmosphere by the high temperature fan, the dust concentration of the discharged gas is less than 30mg/m3. A cold risk control system is installed at the inlet of the dust collector to protect the dust collector.
III. Project site:
