Electroplating waste gas is seriously polluted, and the water spray scrubber purification process can effectively remove harmful substances. This process achieves purification through adsorption, dissolution, diffusion and other steps. Attention should be paid to equipment operation, washing liquid replacement and waste gas monitoring to ensure environmental protection standards are met.
Author: Marisa
With the rapid development of industrial technology, the electroplating industry has not only provided high-quality products to the society, but also generated a large amount of waste gas and wastewater, among which electroplating waste gas is the most prominent problem. This article will analyze the electroplating waste gas water spray washing tower purification process in detail.
I. Sources and hazards of electroplating waste gas
Electroplating waste gas mainly comes from the pickling, alkali washing, chromium plating, zinc plating and other links in the electroplating production process. These links will produce a large amount of chromium-containing, zinc-containing and other harmful gases. If these gases are directly discharged without treatment, they will cause serious pollution to the environment and cause great harm to human health.
II. Principle of water spray washing tower purification process
The water spray washing tower is a commonly used waste gas treatment equipment. Its working principle is mainly to spray the washing liquid into the gas through the spray device, so that the pollutants in the gas are fully in contact with the washing liquid, thereby achieving the purpose of removing the pollutants. Specifically, the water spray washing tower purifies the electroplating waste gas through the following steps:
1. Adsorption: Through adsorption, the pollutants in the gas are adsorbed into the washing liquid;
2. Dissolution: The alkaline substances in the washing liquid can react with the pollutants to neutralize them and convert them into harmless substances;
3. Diffusion: The pollutants in the washing liquid will gradually decrease with diffusion;
4. Recycling: The washing liquid can be recycled after treatment to save resources.
III. Equipment composition and operation process
The water spray washing tower is mainly composed of a tower body, a spray device, a circulating pump, a fan, a pipeline and a valve. The operation process is as follows:
1. Add the washing liquid to the liquid storage tank of the washing tower;
2. Start the circulating pump to transport the washing liquid to the high-level spray device in the tower body;
3. The fan introduces the electroplating waste gas into the washing tower and fully contacts with the washing liquid;
4. The treated waste gas is discharged from the discharge port, and the washing liquid returns to the liquid storage tank through the reflux pipe for recycling.
IV. Precautions
When using a water spray scrubber to treat electroplating waste gas, the following points should be noted:
1. Check the operating status of the equipment regularly to ensure its normal operation;
2. Replace the washing liquid regularly to ensure the purification effect;
3. Monitor the discharged waste gas to ensure that it meets the emission standards;
4. Adjust the fan air volume according to the actual situation to ensure the purification effect while avoiding excessive energy consumption.
In short, the water spray scrubber purification process is an effective method for treating electroplating waste gas. Through adsorption, dissolution, diffusion and other processes, it can effectively remove harmful substances in the waste gas. In actual applications, it is necessary to pay attention to the operation management of the equipment, the replacement of the washing liquid and the monitoring of the waste gas to ensure the purification effect while ensuring that environmental protection standards are met.