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The dust control scheme for coal pulverizing machine room

The dust control scheme for coal pulverizing machine room

Product introduction

The main reason of dust generation in coal pulverizing machine room rests with the induced air produced by rotor blast effect of coal pulverizing machine and big drop of coal falling pipes, followed by the induced air produced by rear buffer deformation of buffer supporting roller, as well as unreasonable sealing of coal chute and checking curtain. The induced air caused by coal pulverizing machine and coal flow brings heavy air volume of positive pressure on coal chute and serious air pollution, also with the secondary dust pollution produced emerged from coal accumulation in rear drum and belt vibration.

After overall consideration on features of dust generation in coal pulverizing machine room, a dust integrated treatment approach is formed, which combines various of ways including dust control including negative pressure air return induction device, the return belt self-cleaning device and sealed high pressure duct removing device, combined with the specific circumstances and with the adopting of the dust reduction principle of high pressure curtain. 

Performance characteristics

Online system monitoring realizes automatic dust treatment through dust concentration.

The adoption of anti-freezing patented technology ensures the normal use under the environment of low temperature.

The adoption of negative pressure air return induction dust reduction technology decreases the spray of positive pressure air flor from the sealed coal chute outlet. 

The adoption of automatic back flushing device and the self-cleaning anti-blocking patented nozzle simultaneously is quite suitable for water sources of flushing water of power plant.

The adopted large screen touch LCD is with the storage function for more than 300 days of historical curves, and it is capable to display operation status of the system and various parameter conditions of the equipment in real time.

The adoption of industrial PLC as the control core and the intelligent linkage with coal handling equipment realize comprehensively automatic operation and unattended operation. 

Technical parameters

Working pressure: 5-10MPa

Water supply pressure: 0.3-0.7MPa

Atomizing particle size: 5-20μm

Spraying angle: 30-110°

Working voltage: 380V AC±10% 50Hz

Rated power: 5.5kW

Water consumption: 0.8L/min

Ball valve: 24V DC 12MPa Communication of RS485

Liquid level signal input: 4-20mA 

Temperature signal: Pt100