Spray tower design
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After the exhaust gas is burned in the burner, HCL gas is produced; it cannot be released directly. Therefore, it is necessary to spray this HCL gas. As we know, HCL is highly soluble in water. The key issue now is how to design this spraying system in a scientific manner. Please discuss this so that we can all improve together.
We generally don’t use spray towers; instead, we use falling film absorption, which allows for a cleaner absorption process.
Information on this topic can be found on this forum: http://bbs.hcbbs.com/thread-69615-1-1.html
The acid tower can be eluted with water, by applying a pressure of around 4 kilograms
In our system, the fluid is first absorbed using a venturi tube before entering the packing tower. The packing consists of ceramic Raschig rings; there are two distributors, one at the top and one at the bottom, with the packing layer situated in between. A demister is installed at the top, and above that spray head, there is another water spray head oriented upward, which is used to flush the demister at the top when the pressure drop is high or during shutdowns for maintenance. The exhaust gas level is less than 1/10 of the **specified standard.
The following points should be considered in the design of a spray tower: Equipment structure and working principle. A cyclone plate tower consists of components such as the tower body, packing, liquid distributor, gas-liquid separator, spray system, circulation water pump, circulation water tank, and chemical solution storage and dosing system. The packing layer inside the tower serves as a mass transfer device that acts as a contact element between the gas and liquid phases. The bottom of the packed tower is equipped with a packing support plate, on which the packing is placed in a random pile. A packing pressure plate is installed above the packing to prevent it from being blown by upward air currents. The spray liquid is sprayed from the top of the tower through a liquid distributor onto the packing, and flows down along the surface of the packing. Gas is fed in from the bottom of the tower; after being distributed by the gas distribution device, it flows counter-currently to the liquid through the gaps in the packing layer. On the surface of the packing, the gas and liquid phases come into close contact for mass transfer to occur. As the liquid flows downward through the packing layer, wall flow can occur at times. This wall flow effect leads to an uneven distribution of the gas and liquid phases within the packing layer, thereby reducing the mass transfer efficiency. Therefore, the packing layer in the spray tower is divided into two sections, with a redistribution device placed in between; after redistribution, the liquid is sprayed onto the lower layer of packing. To prevent the gas from carrying away the spray liquid, an air-water separator at the top of the tower effectively traps the spray liquid. The spray liquid is reused, with some loss occurring during use; the circulation water tank at the bottom of the tower replenishes the spray liquid as needed.
In my personal opinion, an acid removal tower is better
What are the parameters for designing a spray tower? For example, spray density, airflow velocity……
What are the parameters for designing a spray tower? For example, spray density, airflow velocity……
I think it’s better to use falling film absorption; this way, the absorption is more thorough
I think it’s better to use falling film absorption; this way, the absorption is more thorough
Could someone provide some information on spray towers, preferably regarding their design?
Just use a packed tower for absorption; there are detailed explanations on this in the principles of chemical engineering
I would like to know the parameters of a filler tower used for absorption, such as the empty tower velocity; some people say 2.5 is an appropriate value. Also, regarding the type of filler to choose, I’m dealing with industrial waste gas that contains a lot of fluff, and I’m concerned that using fillers might lead to scaling and blockages. Could someone please help me with this?
After talking for so long, we still haven’t addressed the fundamental issue: what are the temperature, flow rate, and HCL concentration? Due to these differences, the plans vary.
Haha... I really hope to be able to learn more about this area as well
What is the HCL concentration when you enter, and what is the empty tower velocity?