Design of Dust Removal System for Coal Preparation Conveyor in Power Plant

1. Power plant coal preparation conveying dust collector: bag filter

2. Vacuum hood: divided into sealed hood and semi sealed hood

3. Pipeline: divided into main pipeline and branch pipeline

4. Manual air regulating valve

5. Dust collector unloading: The equipment uses a conveyor to automatically unload onto the belt, and is sealed at the unloading point on the belt to avoid secondary flying.

6. Fan, motor

7. The dust removal filter bag of the coal preparation conveying dust collector in the power plant is made of needle punched felt cloth bag. The dust collector is equipped with a port, and the fan motor is equipped with a certificate of conformity and MA mark.

Process flow of dust collector for coal preparation and transportation in power plants: The dust generated at the dust point enters the dust collector through the vacuum hood and air duct under the negative pressure of the main fan. After being purified by the filter bag (external filter), the clean gas is drawn into the exhaust pipe by the main fan and discharged into the atmosphere; The dust collected by the dust collector falls into the ash hopper. The process characteristics of the dust removal system are low resistance and high flow rate. Based on this system process characteristic, the pipeline network design is optimized to reduce system resistance loss. The flow rate control method is adopted to determine the economic flow rate of the system pipeline as 16-19m/s.

(1) Reasonably arrange the pipeline structure and minimize local resistance caused by bends and sudden changes in pipelines.

(2) Choose the appropriate cross-sectional shape for the pipeline.

(3) Adopting low resistance dust collectors and structures with balanced resistance control.

(4) Reasonably arrange the pipeline, collection hood exhaust outlet, and vibration screen suction hood to be fully sealed, which is conducive to dust collection. The suction hood is designed with an inspection door, which is conducive to the daily maintenance of the vibration screen. The relative position of the dust collector inlet and outlet and the fan reduces system resistance.

(5) Choose appropriate fans and motors to operate in the high efficiency zone.

(6) The dust collector for coal selection and transportation in the power plant is installed near the vibrating screen to facilitate dust collection and reduce system resistance. The chimney is on the top of the workshop.