Electroplating waste gas causes significant damage to the environment, human health, and the analysis of the harmfulness of electroplating waste gas is also the premise and foundation of electroplating waste gas management.

The damage of electroplating waste gas to the human body is mainly reflected in the damage to the respiratory tract, eyes, and skin. Some electroplating waste gases are colorless and odorless, causing slow damage to the respiratory tract. Through gradual accumulation and exceeding the limit, they can lead to diseases such as bronchitis, bronchial asthma, lung cancer, and liver cancer. The hydrogen chloride and acid-base mist emitted from electroplating processes can have irritating effects on the human eyes and skin, leading to symptoms such as redness and dermatitis.

Electroplating waste gas also causes damage to plants and buildings. The sulfur dioxide and nitrogen oxides emitted by electroplating processes have harmful effects on plant growth in the air, even killing plants. If acid rain forms again, it will also cause corrosion, rust, and oil damage to buildings. In addition, electroplating waste gas can also cause damage to electroplating products. For example, in the electroplating workshop, too much acid, alkali mist, dust, etc. can have varying degrees of impact on the purity of electroplating equipment and materials.

The types of electroplating waste gas mainly include hydrogen chloride, chromic acid mist, sulfuric acid mist, nitrogen oxides, hydrogen cyanide, as well as some dust gases and alkaline gases, which cause great damage to the environment. The commonly used management methods nowadays are to start from the optimization of the source process on one hand, and to cooperate with the purification equipment and exhaust system of the device to use the deodorant absorption liquid. It is necessary to summarize and consider, and coordinate the treatment.

According to the characteristics of electroplating waste gas emissions, production conditions constraints in the factory workshop, and harmful waste gas emission methods, different exhaust systems are selected. In a workshop, partial exhaust methods are usually chosen due to factors such as unstable sources of air and multiple emission points. Monitor the gases from these partial exhaust methods. If they meet the emission standards, they can be directly discharged into the atmosphere. If they exceed the emission standards, the exhaust gas needs to be introduced into the purification system. At the point where harmful emissions are discarded, the exhaust gas needs to be collected directly and discharged outdoors through the ventilation system. In order to ensure the balance of air pressure in the workshop, mechanical ventilation is also necessary to adhere to indoor air quality standards.

The purification of acidic waste gas from electroplating mainly involves spraying the acidic waste gas with a three-level alkaline solution, and then discharging it through the chimney. When using this method to absorb acidic waste gas, a closed cover is installed on the vacuum pump to discharge the gas in the workshop into the spray tower equipped with fillers, and then a deodorant product is added to the circulating water of the spray tower. Deodorants can react quickly with various harmful and odorous molecules through polymerization, substitution, displacement, adsorption, and other chemical reactions. The product is neutral, non flammable, non corrosive, and non secondary pollution. It is an effective product for removing waste gas, odors, and odors. The efficiency of purifying acidic waste gas by this process can reach over 85%.

The article originates from a deodorant manufacturer http://www.scneng.com.hk