Spray Dryer Tower For Power Plants / Manufacturing Facilities

Gas Inlet Spray tower

The basic principle of a spray tower involves the use of liquid sprays to capture and remove pollutants from the gas stream. Here's a general overview of how it works:

Gas Inlet: The gas stream containing pollutants enters the spray tower through an inlet. This gas stream may contain various pollutants such as dust, particulate matter, gases, or odorous compounds.

Liquid Sprays: Inside the spray tower, liquid sprays are introduced. The liquid can be water or a chemical solution, depending on the specific pollutants to be removed. The liquid is typically atomized into small droplets to maximize contact with the gas stream.

Contact and Absorption: As the gas stream passes through the spray tower, the liquid droplets come into contact with the pollutants. The pollutants can be absorbed by the liquid droplets through various mechanisms, such as dissolution, chemical reactions, or physical impaction.

Particle and Gas Removal: The liquid droplets, now containing the captured pollutants, continue to move downward in the tower due to gravity. As they descend, the droplets grow in size by coalescing with each other and capturing more pollutants. Eventually, the droplets and captured pollutants settle at the bottom of the tower, where they are collected and removed.

Clean Gas Outlet: The cleaned gas stream, with a reduced concentration of pollutants, exits the spray tower through an outlet at the top. Additional treatment steps, such as filtration or further gas cleaning, may be applied if necessary.

Spray towers can be designed in various configurations, including counter-current flow, cross-flow, or co-current flow, depending on the specific application and pollutant characteristics. The design and operation parameters, such as liquid flow rate, droplet size, residence time, and contact efficiency, are optimized to achieve effective pollutant removal.

It's worth noting that the liquid used in spray towers may require treatment or disposal to address the captured pollutants. Additionally, proper maintenance and monitoring are necessary to ensure the efficient operation of spray towers and compliance with environmental regulations.

Please keep in mind that my knowledge cutoff is in September 2021, and there may have been advancements or variations in spray tower technology since then.

The flue gas from the bag dust collector is sucked by the induced draft fan and enters the two-stage spray tower for spray washing to remove the acid gas in the flue gas. By controlling important factors such as the deacidification liquid, flue gas flow pattern, deacidification liquid atomization state, droplet residence time, and reasonable liquid-to-gas ratio, the ideal absorption effect is achieved, thereby ensuring that the content in the flue gas meets emission requirements.