The Application of Air Filter in Dry Spray Booth
The application of air filter in dry spray booth is mainly reflected in its efficient filtration ability of paint mist, particulate matter and harmful gases, to ensure the safety of the spraying environment, improve work efficiency, and meet environmental protection requirements. The following details the application of air filters in dry spray booths from several aspects:
1. The basic structure and working principle of the dry spray booth
The dry spray booth is usually composed of a chamber system, a make-up air filtration system, a paint mist separation and filtration system, a suction and exhaust system, a paint recovery device, and an exhaust gas treatment device. The filtration system is a key part of this and is used to capture the paint mist and particulate matter generated during the spraying process. Through inertial separation technology, the dry filter uses filter fibers to change the direction of airflow, so that particles are adsorbed on the filter material, to achieve efficient filtration.
2. The overall structure of the dry paint booth
The dry paint booth usually consists of multiple functional areas, including fresh air filtration, paint booth, static pressure chamber, and constant temperature control system. The dry filter is located before the paint booth and is used to intercept the paint mist particles. For example, the Figure shows a schematic diagram of the construction of a dry paint booth, where the first layer is a dry carton filter chamber for paint mist treatment.
3. Types and Functions of Filters
Commonly used filters in dry spray booths include labyrinth dry filter paper, DPA paint mist filter, HEPA filter, etc. Labyrinth dry filter paper can effectively intercept oversprayed particles by changing the direction of airflow many times. The DPA paint mist filter is made of special synthetic fiber material, which has high filtration efficiency and a large filtration area, and is suitable for spraying high solid content coatings. HEPA filters are used to further purify the air and ensure that the exhaust gases meet environmental standards.
The following is a detailed description of several filters commonly used in dry spray booths and their characteristics.
DPA Paint Mist Filter
DPA Paint Mist Filter is a new type of environmentally friendly filter made of special synthetic fiber material, which has an efficient paint mist capture ability. Its 3D diamond dot design significantly increases the filtration surface area, making it efficient at up to 99.8% and capable of intercepting many types of paint mist and particulate matter, such as solid coatings, powder coatings, and water-based coatings. In addition, the DPA paint mist filter has an initial pressure drop of only 14Pa, a service life of up to 30 days, and a single bag of paint mist absorption capacity of up to 22kg, which is very suitable for spray booth modification scenarios where space is limited.
- DPA Dry Carton Mist Filters offer the following advantages:
- Reduce solid waste generation: The environmentally friendly carton is equipped with 3D synthetic paint mist cotton, which can be directly incinerated after use
- Reduce the cost of use: easy and quick installation
- Improve filtration efficiency: professional design, firm sealing, no side leakage
- Extended service life: A single carton filter can capture 16kg of overspray paint
Labyrinth Dry Filter
Labyrinth dry filter is a multi-layer paper filter that uses airflow to effectively absorb oversprayed paint mist and make particles adhere to the paper wall. This filter is environmentally friendly, avoids water contamination problems, and has a bearing capacity of 3 to 5 times that of other types of filters, and can remove paint mist with an efficiency of more than 90%.
