Bag Filter dust filter system

Bag Filter dust filter system for rotary drum dryer. Rotary drum dryer is a drying device for materials such as sawdust, wood chips, sand, rock, etc.

MỤC LỤC

Bag Filter dust filter system removes dust with high concentration

Introducing the Bag Filter

A bag filter is an air pollution control device for removing dust particles from the air or emissions from commercial processes or combustion for power generation where collection efficiency is required. high.

Equipment for handling fine dust by Bag Filter

Bag filter is used in bag house. Most warehouses use long, cylindrical bags (or tubes) made of woven fabric or felt as the filter media. Dusty gas or air enters the bagger through hoppers (large funnel-shaped containers used to store and distribute seeds) and is directed into the bagger compartment.

Equipment handling fine dust by Bag Filter

Air is drawn through the bags, either inside or outside depending on the cleaning method, and a layer of dust accumulates on the surface of the filter media until air can no longer move through it. When the pressure drop is sufficient (delta P), the cleaning process begins. Cleanup can take place while the brothel is online (filtering) or offline (isolation). When the compartment is clean, normal filtration will continue.

Main features of the filter dust treatment system

– Filter dust treatment technology is better than other technologies for dust treatment.

– The product treats dust with a filter with a filtering efficiency of up to 99%+, compared to other products.

Principle of fine dust filter

After the exhaust gas passes through the bag filter system, the cloth bag system is retained, and the dust accumulated on the cloth bag, after a certain time, will be automatically pulsed by the system. compressed air) into the filter bag, causing the dust to no longer cling to the cloth bag and fall to the dust container.

The filter works on the principle of the filter as an automatic cleaning bag filter. Each filter bag is shaken and periodically cleaned by a jet of high-pressure air coming out of the compressed air tank.
Pressurized air is distributed to each row of filter bags by means of diaphragm valves and bellows equipped with hollow nozzles.

The high-pressure air backflow temporarily stops normal flow and creates a shock wave that will suck dust off each bag surface. A certain percentage of the dough cake falls from the bag into the dust filter chamber.

Advantages of bag filter dust filter system

Capable of collecting various types of dust.
Easy to design and install.
Stable operation for a long time.
The ability to filter dust up to 99% +.
Stable operation
Relatively high dust filtration efficiency
Low maintenance cost
Construction cost, cost of materials and equipment is cheap
Low running costs
Recovers dust in dry form, so it can be reused
Equipment with high temperature resistance, corrosion resistance
Takes little space to build
Long use time

Application

Asphalt mixing station
Cement plants.
Cement, plaster, lime industry.
Metal factory.
Biomass power plant
Food factory.
Origin ceramic factory.
Chemical industry
Coal-fired power plants, food industry
Rubber factory.
Pharmaceutical factory.
Textile factory.
Fertilizer factory.
Steel and non-ferrous metal production, Solid/liquid separation
Food factory, grain factory…

Working principle of bag filter dust treatment system

Operation process of bag filter dust filter system

Check the dust treatment system before operation

Check the mechanical part

Check that the grease in the exhaust fan-loading screw bearings is complete.
Check the exhaust fan belt to ensure the tension to operate.
Check the vibration of the fan before operating.

ATTENTION:

During welding, cutting, outside the box or inside, absolutely do not turn on the exhaust fan, which will cause the fabric bag to burn and the cloth bag container.
If you go into the storage bin for repair, use the safety lock switch to the OFF position, leave the board under repair and have someone stand outside.

Check electrical equipment:

Check the electrical signals to ensure enough to operate the machine,
Power on the power sources of the attached equipment.
The voltage is sufficient to operate the machine and its attached equipment.
Check if the warehouse screw signals are on or not.
Check the cap sensor signal.

Record test data for comparison of operating shifts for control direction before problems occur.

Machine operating procedure

Hand Mode

Step 1: Turn the switch to Manual mode.
Step 2: Press the status buttons to run equipment such as: Exhaust Fan, Conveyor.
Step 3: Open the compressor, check the compressed air pressure.
Step 4: Turn the switch to manual mode for the equipment: Dusting bins, screws, ….
Step 5: Turn OFF mode when no longer in use.

Note

Use manual mode only when testing equipment or commissioning.
Move the switch to the off position when stopping manual mode.

Auto Mode :

Step 1: Turn all auxiliary equipment of the dust removal system to Auto such as: Dust Cleaner, Airlock 1.1, Dust Collector Screw,
Step 2: Switch to Auto of dust removal system.
Step 3: Select to start the central vacuum cleaner fan.

Note

After the exhaust fan starts up, the signal will be returned to the dust treatment system.
After receiving the start signal of the exhaust fan, the machine will automatically turn on the conveyor screws and the central dust treatment system.

Stopping the dust removal system

Step 1: Turn off the central vacuum cleaner fan.
Step 2: Turn the Auto switch to the Off position.
Step 3: : Turn all auxiliary equipment of the dust removal system to OFF such as: Dust Cleaner, Airlock 1.1, Dust Collector Screw, ….
Step 4: Empty the container when dust is at the end of the day to avoid explosion.
Step 5: Close the E – STOP button when leaving the machine..

Notes in the operation procedure of the Bag Filter dust filter system

Empty the tank when dusty at the end of the day.
This is a necessary condition to run the fine crusher.
The dust keeping schedule is at 9 11 15 5 p.m. daily, the schedule is subject to change in accordance with plant operations.
There is a schedule to check and maintain the machine daily, weekly and monthly. (Especially check the exhaust fan).