In the production and processing of metal die-casting, the melting and insulation of die-casting alloys, the preheating of die-casting molds, the spraying of coatings, the operation of die-casting machines, and the cleaning of die-casting parts all generate smoke, harmful gases, oil droplets, oil stains, noise, and thermal radiation. These pollutants not only pose great harm to the health of enterprise operators, but also have an impact or pollution on the environment. In order to ensure a good production environment in the workshop and the physical health of workers, it is urgent to build scientific and efficient waste gas treatment equipment for die-casting machines.

The components of exhaust gas from die-casting machines mainly include acidic gases such as HCl, H2S, NOx, as well as organic waste gases such as dust, formaldehyde, xylene, acetone, butanone, acetic acid, ethyl ester, etc. These exhaust gases mainly come from the melting and insulation of die-casting alloys, preheating of die-casting molds, spraying of coatings, operation of die-casting machines, and cleaning of die-casting parts. The characteristics of exhaust gas in the die-casting machine industry are mainly reflected in high temperature, complex composition, and many harmful substances.

In terms of collection methods, the die-casting machine industry has standalone oil mist purifiers and centralized pipeline collection;

The principle of the standalone version: The release agent mist generated by the die-casting machine enters the pipeline through negative pressure suction of the fan, and enters the oil mist purifier at a certain transportation speed (16-20m/s). The mist entering the equipment first passes through a special mechanical structure of the equipment, intercepting the large molecule emulsion particles at the bottom of the equipment. The remaining particles are filtered through the first and second stage stainless steel mesh filter and the third stage H13 high-efficiency filter, and finally discharged into the room through the fan. The separation system is equipped with an automatic spray system, which regularly cleans the particles that remain on the surface of the filter element repeatedly, in order to extend the service life of the filter element. The bottom of the separator is equipped with a storage tank and a reflux pump. The high and low positions are controlled by the liquid level, and the reflux pump is sucked and stopped by the control system. This allows the collected liquid to return to the machine tool or the customer's designated location, thereby achieving recycling and reuse.

Common purification equipment for centralized collection includes activated carbon adsorption devices, wet exhaust gas treatment towers, etc. These devices can effectively remove harmful substances from exhaust gas, purify exhaust gas, and meet emission standards.

There are various methods for treating waste gas in the die-casting machine industry in terms of equipment solutions. If the waste gas from die-casting machines mainly contains water-soluble gases, particulate matter, and organic pollutants, the combination of spray towers and activated carbon boxes may be a better choice. If the exhaust gas mainly contains oil mist particles, the combination of spray tower and oil mist purifier may be more suitable.

In addition, in order to more effectively reduce the generation and emissions of exhaust gases, the die-casting machine industry can also take the following measures:

Optimizing process parameters: By adjusting the process parameters of the die-casting machine operation, such as pressure, temperature, etc., the generation of exhaust gas can be reduced.

Strengthen equipment maintenance and management: Regularly maintain the die-casting machine to ensure its normal operation and reduce the content of harmful substances in exhaust gas.

Training employee awareness: Strengthen environmental awareness training for employees, enhance their awareness of the importance of waste gas treatment, ensure that employees strictly follow operating procedures and use waste gas treatment equipment correctly.

In summary, the treatment of waste gas in the die-casting machine industry is a complex and important task. Suzhou Baigong Environmental Protection Technology Co., Ltd. (BeeGom) adopts various methods and measures based on the specific composition and concentration of waste gas generated by customers to ensure effective treatment of waste gas and environmental safety,.