Crown Type 8 Inch Fine Bubble Disc Air Diffuser with EPDM Membrane
Product Description
Microporous Crown type aerator and support tray have unique
spherical cap structure. Structure and working principle: the
spherical crown microporous aerator is mainly composed of aeration
diaphragm, support tray, screw gland, threaded nozzle and other
components. As long as the rubber diaphragm is sheathed on the
support tray, screw gland can be used for tightening.
EPDM membrane is suitable for biological wastewater treatment and
conventional industrial wastewater treatment.
The applicable temperature of silicone membrane is - 65 ℃ - 232 ℃,
which is suitable for wastewater treatment in pulp and paper
industry, petrochemical industry and oil refining process.
Technology Parameter
| Model | HSPD200 | HSPD260 | HSPD300 |
| Bubble Type | Crown Type |
| Size | 8 inch(200mm) | 9 inch(260mm) | 12 inch(300mm) |
| MOC | EPDM/silicone membrane |
| ABS carrier plate |
| Connector | 3/4"NPT male thread |
| Bubble Size | 1-2mm |
| Flow Range(m³/h) | 1-6 | 1-8 | 1-12 |
| Design Flow(m³/h) | 1.5-3 | 2-5 | 2-8 |
| STOE | ≥38%(6m submerged) |
| STOR(kg O2/h) | ≥0.31 | ≥0.45 | ≥0.75 |
| SAE | ≥8.9kg O2/kw.h |
| Headloss | 1500-4300pa |
| Service Aera(m2) | 0.3-0.65 | 0.4-0.8 | 0.5-1 |
| Service Life | >5 years |
Maintenance
1. The operator should check the aeration condition of the aeration
system frequently. If the head resistance of the aeration system
increases or the bubble shape changes, the aerator needs to clean
up the precipitates such as carbonate, iron salt, aluminum salt and
biological sludge. The scaling on the rubber membrane of the
aerator will reduce the air output, reduce the oxygen utilization
law of the aeration system, and increase the head loss.
2. Regular drainage cleaning is an ideal maintenance method, and
the duration depends on the nature of the treated water, treatment
process and other factors.
3. During drainage cleaning and maintenance, do not let the
precipitates on the surface of rubber film dry and agglomerate, and
clean them immediately. The drying and caking of sediment will make
cleaning difficult and affect the performance of aerator.
4. Biological sludge can be removed by physical methods, and the
surface of rubber membrane can be cleaned by brush or washed by
high-pressure water gun. When cleaning with a high-pressure water
gun, the nozzle of the water gun shall be kept about 500mm away
from the surface of the rubber film to prevent damage to the rubber
film.
5. Carbonate and other scaling should be removed by chemical
method. A certain amount of formic acid will enter the aeration
system with air. The proportion of formic acid added depends on the
scale degree. It is not necessary to empty the water in the
aeration tank during cleaning. Generally, clean once or twice a
year.
6. When the microporous aerator is damaged or considered to be
unable to meet the performance requirements after cleaning and
maintenance, the rubber diaphragm can be replaced or the whole
aerator can be replaced. The replacement method is the same as the
installation method.
Possible problems and solutions
a. Large bubbles appear in a certain area of aeration tank
1. Air distribution pipe leakage
Treatment method: drain the water in the problem area, check with
small amount of air blast, determine the location of leakage and
repair.
2. Rubber film of aerator is damaged
Treatment method: drain the water in the problem area, use a small
amount of air to check the aerator, determine the leaking aerator,
and replace the rubber diaphragm or the whole aerator.
b. Uneven bubbles
1. Insufficient air
Handling method: check whether the blower operates normally.
2. The valve on the air pipe is closed or not fully opened:
Treatment: check whether the valve is open.
3. The installation of aeration system in the tank is not ideal:
Treatment method: empty the water in the problem area, check
whether the horizontal error of the aeration distribution pipe is
within ± 6mm; check whether the air pipe and interface are scaling
and blocked, if any, use air blowing and high-pressure water gun to
wash.
4. Scaling on rubber diaphragm
Treatment method: check whether there is scaling on the rubber
membrane, if any, clean the rubber membrane; replace the rubber
membrane or the whole aerator.
c. The dissolved oxygen in water decreases abnormally, and the head
loss of aeration system increases
1. Scaling on rubber diaphragm
Treatment method: check whether there is scaling on the rubber
membrane, if any, clean the rubber membrane; replace the rubber
membrane or the whole aerator.
d. The dissolved oxygen level in the whole aeration tank is
inconsistent
1. Insufficient air
Treatment: check whether the blower operates normally; check
whether the valve on the air pipe is in the open state.
Package Method
