How to deal with the dust filter bags with sparks

When the bag filter is processing the dust with sparks from wood chip boilers, rice husk boilers, aluminum regeneration furnaces and smelting furnaces, the burned dust in the furnace may enter the box with the airflow of the air duct. The double anti-filter bags cause accumulation in The dust on the dust bag catches fire, which can easily cause accidents.

So how should the bag filter handle the dust with sparks? To prevent sparks from entering the bag filter, the following measures should be taken:

1. Set up pre-dust collector and cooling pipe

A cyclone dust collector or an inert dust collector is installed in front of the bag filter as a pre-dust collector to capture coarse dust and sparks. In this way, too fine particles and sparks are not easy to capture. In most cases, particulate dust can be collected before entering the dust collector. Burn out.

Set up a cooling pipe after the pre-cleaner, and control the flow rate in the pipe to make it as low as possible. This is a relatively reliable technical measure, which allows the gas to have sufficient residence time in the tube.

2. Set up cooling spray tower

A gas cooling method that directly sprays water in advance. In order to ensure the safety and fire prevention of dust-containing gas in the bag filter, the amount of cooling water is controlled and supplied.

Most of the burning dust can be cooled as soon as it comes into contact with the fine water droplets, but the water droplets are easy to gasify. In order to cool the combustion dust that has not been in contact with the water droplets, there should be necessary space and residence time.

In special circumstances, a combination of spray tower, cooling pipe and pre-dust collector can be used to prevent the mixing of sparks more thoroughly.

3. Set up a Mars trap

Installing a spark trap on the pipeline is a simple and feasible method. At the same time, a spark alarm is installed. The moment the spark passes through the trap, it can make it send an electrical signal to give an alarm, and at the same time, stop the operation or change the gas circuit.