How to deal with foundry waste gas?

Flue gas treatment method in foundry workshop

Treatment scheme of waste gas and dust in foundry workshop

The general treatment process is as follows:

1。 First of all, dust particles and waste gas in the workshop that produces casting flue gas pass through the pipeline.

2 into the fan duct. And then the dust particles are filtered by a pretreatment device. The filtering equipment can be a wet scrubber or a dry filter, otherwise, the model needs to be calculated, and the air volume may be too large or too small, resulting in the casting flue gas in production not being exhausted or the pipeline being sucked flat.

Three. After pretreatment, toluene, xylene and non-methane can be filtered by activated carbon adsorption equipment.

4。 After being treated, the flue gas from foundry production will be directly discharged by the induced draft fan through the chimney with a height of 15m, and the emission standard of waste gas must meet the national secondary emission standard.

The purification efficiency of activated carbon adsorption tank is generally above 90%. Our products have complete specifications and models. From 4000 air volume to 64000 air volume, it is standardized equipment. Other models can be customized.

For different industries and different types of waste gas, the purification methods of industrial waste gas will be different. Environmental experts in Jinzhou suggest that many factors should be considered when choosing industrial waste gas purifier, including the type of industrial waste gas, the main components of industrial waste gas, whether the source of waste gas is indoor or outdoor, the concentration of industrial waste gas, the budget of waste gas purification process and so on. The foundry industry is an energy and resource-intensive industry, and the production of castings needs to consume a lot of energy and various raw and auxiliary materials. Its main components may be smoke, dust, odor (organic waste gas) and hot air. The collection of foundry flue gas is the key of production line treatment, and its space conditions are greatly limited, so effective collection measures must be taken according to local conditions.

Smoke characteristics of foundry workshop

The pollution sources are scattered, with low concentration and large gas volume. Among the 188 hazardous air pollutants listed by the US Environmental Protection Agency, more than 40 harmful air pollutants were detected in foundry dust, which caused harm to the environment and human health.