Views: 6439 Author: Site Editor Publish Time: 2013-01-24 Origin: Site
I. Project overview
Date of signing: 2013-01-24
Processing material: pulverized coal
Processing capacity: 5t/h
Equipment configuration: 1725 air sweep mill, powder separator, dust collector, screw conveyor, fan, bucket elevator, gas and coal powder mixing burner
On January 24, 2013, Shaanxi Fugu County coal preparation project signed a 5t/h coal preparation equipment contract with our company. The main equipment: 1725 air sweep mill, powder separator, dust collector, screw conveyor, fan, bucket elevator, coal gas and coal powder mixing burner provided by our company.
II. Solution
Raw coal storage and transportation system
1. The raw coal with particle size < 35mm and water content < 15% is transported to the raw coal shed by the dump truck, the raw coal stored in the coal shed is loaded into the coal hopper by the loader, and the raw coal in the coal hopper is uniformly fed to the bucket elevator by the speed feeding belt machine, and the raw coal is discharged after the elevator is lifted to the required height, and enters the pulverizing system through the double lock air valve.
2. A bar valve is arranged between the receiving hopper and the vibrating feeder. The bar valve can be closed during the maintenance of the speed feeding belt conveyor, which is conducive to the maintenance operation. Speed feeding belt machine can realize speed control function, which is conducive to generating operation and management. The adjustable speed feeding belt is equipped with an iron remover, which can remove the mixed iron filings in the raw coal and avoid the threat of iron filings to the system.
Pulverizing system
1, the raw coal storage and transportation system into the wind-swept coal mill, after grinding, coal and 200℃ ~ 350℃ hot air for mass and heat transfer, water from the coal into the flue gas, coal powder is dried by the hot air, and then, coal powder with the air into the sorting machine, the selected coarse powder back to the mill grinding, fine powder continues to flow through the coal air pipe into the powder collection system.
2, air sweep coal mill hot air inlet pipe and coal air outlet pipe are set with explosion valve and nitrogen protection interface, to protect the safety of equipment and system. By adjusting the frequency converter, the fineness of the powder can be controlled remotely.
Powder collection system
Under the negative pressure of the induced draft fan after the explosion-proof bag dust collector, the qualified fineness of the pulverized coal discharged by the pulverized coal separator enters the explosion-proof bag dust collector through the coal air pipe. After being filtered by the filter bag inside the dust collector, the pulverized coal is captured and falls into the pulverized coal hopper at the lower part of the dust collector. The flue gas filtered and purified by the dust collector is discharged to the atmosphere by the induced draft fan through the chimney. The pulverized coal stored in the pulverized coal bucket is discharged into the bucket elevator by the star discharger and the screw conveyor, and then lifted to the top of the pulverized coal bin by the bucket elevator.
III. Project site
