If the air contains viscous materials, how should the exhaust fan be selected or handled?

To address this situation, the following measures can be taken: 1. Select an appropriate exhaust fan: A fan with an anti-adhesion coating should be chosen, or a magnetic drift synchronous motor exhaust fan without bearings can be used to reduce material adhesion. 2. Install protective measures: Filters, guards, and other devices can be fitted on the exhaust fans to prevent materials from entering the fan blades. 3. Regular cleaning and maintenance: Regularly clean the accumulated debris in the impeller and pipes of the exhaust fan, as well as replace any damaged components, to ensure the proper operation of the exhaust fan. 4. Adjust operating conditions: Modify parameters such as the discharge rate, temperature, and humidity of the spray drying tower to minimize material sticking; additives can also be used to improve the flowability of the material. .

The substances contained in the exhaust gas are similar to milk powder and are highly soluble in water; is it feasible to install a spray system before the fan? If possible, does a spray tower need to be sealed? Will it bring a large amount of water vapor into the pipes and fans?

For exhaust gases containing substances similar to milk powder, increasing the amount of spray water is a viable treatment method. However, the following points should be noted during operation: 1. The water source for spraying should be located before the exhaust gas reaches the fan, in order to prevent water vapor from entering the pipes and the fan. 2. The amount of water sprayed needs to be controlled properly; excessive spraying can cause water vapor to accumulate in the pipes and fans, affecting the normal operation of the equipment ； Too little spraying will not achieve the desired treatment effect, so adjustments need to be made based on the actual situation. 3. After spraying water, a demister or dehumidification measure can be installed to prevent water vapor from entering the pipes and fans. 4. In the design of the spray tower, it is necessary to ensure good sealing of the tower to prevent the loss or leakage of the spray water. In summary, spray treatment is an effective method for dealing with the substances contained in exhaust gases, which are similar to milk powder, but attention must be paid to issues such as water volume, water source, and sealing. .

Thank you. I have another question: what kind of company should I look for to provide parameters or develop a design plan?

Find a manufacturer for installing or constructing a spray tower; it is advisable to equip the tower with a mist remover to capture some of the water vapor.

Isn’t a spray tower equipped with a bag filter? The fine particles in the exhaust gas are usually collected in the filter, and the exhaust gas after dust removal can be discharged directly. In this project, a spray tower is mainly installed at the rear end of the exhaust fan; why would it be installed at the front?