Project unit characteristics
Name of equipment: silica gel membrane microporous aeration pipe
Silicone rubber film diameter mm 67
Silicone rubber film thickness mm 1.5
Support tube diameter mm 63
Membrane opening area m2/m aeration pipe 0. 15
The service life of diaphragm is more than 8 years.
Bubble diameter mm ≤2.0
perform
Dynamic efficiency (3.6m depth and 30% density) KgO2/kW.h 7
Oxygen utilization rate (3.6m depth and 30% density)% 29
Ventilation (standard configuration) m3/h.m ventilation pipe 8
The ventilation range is m3/h.m aeration pipe 2~ 12.
Resistance loss kPa 3.3~6.7
Hardness din 53505:60±5 shore a.
Density din 53479:1.19g/cm3.
Tear strength DIN 53504 SII: 9 N/mm2
Ultimate elongation DIN 53504SII: 450%
Tear strength ASTM-d624b: 45n/mm i. Comparison of films
1, REHAU silicone rubber membrane microporous tubular aerator is made of materials with strong corrosion resistance and aging resistance;
Aeration membrane: silicone rubber membrane
Support tube: PP polypropylene
2. Advantages of rubber film:
high elasticity
Plasticizer free
Will not become brittle.
Low affinity with sediments
High temperature resistance
High chemical resistance
High oil resistance
Non-biodegradable
Recyclable recyclable
3. Disadvantages of 3.EPDM film:
It contains plasticizer, which is easy to be lost in sewage, leading to membrane shrinkage.
After running in sewage for a period of time, the EPDM film will become hard and brittle.
It is easy to be affected by sediments in sewage, causing micropore blockage.
Compared with silicone rubber film, EPDM film is much worse in chemical corrosion resistance and aging resistance.
4. Silicone rubber membrane aeration pipe can be cleaned with high-pressure water; However, EPDM membrane can only be pickled because of chemical changes with chemicals in sewage, which is complicated and dangerous.
Under normal circumstances, the silicone rubber membrane aeration tube can run normally for at least 8 years without replacement; However, EPDM membrane usually appears chemical blockage after 2 years, and the pressure loss increases, which affects its normal operation and has to be updated or pickled.
Second, the advantages of aeration pipe:
1), the silicone rubber film has corrosion resistance and aging resistance, long-term high elasticity, long service life and stable performance.
2) The support tube is made of corrosion-resistant polypropylene.
3) The patented flexible point system design ensures that the diaphragm perforation will automatically close when the gas supply is stopped, and the wastewater will not enter the pipeline.
4) Perforation will not be blocked, which is suitable for both continuous operation system and intermittent operation.
5) Good aeration characteristics, high oxygen utilization rate and high power efficiency.
6) Optimum bubble volume and uniform bubble distribution.
7) Low buoyancy design of aeration system
8), the installation is quick and simple, saving a lot of accessories.
Third, the advantages of aeration system:
1, Ruihao microporous aeration system can run intermittently without affecting the sealing performance of silicone rubber membrane of aeration pipe.
Waste water will not enter the gas distribution system.
Sundries will not enter the membrane pores.
A small-scale trend.
2. With the loss of plasticizer, the sealing performance of EPDM microporous membrane aeration system will gradually lose, and then micropore blockage will occur.
3. Ruihao microporous aeration system has very high oxygen transfer efficiency (measured and identified by Professor Poepel of Darmstadt University of Technology, Germany).
Total ventilation is reduced.
Lower energy consumption in operation.
Under the condition of given air volume, aeration pipes can be used less and investment can be saved.
4. Ruihao microporous aeration system is economical to use, and the investment can be recovered in a short time (BOT project).
5. Ruihao microporous aeration system is not affected by water pressure because of its elastic resilience.
6. Ruihao silicone rubber microporous aeration system can prevent mud accumulation at the bottom of aeration pipe because of its microporous distribution structure.
7. Ruihao silicone rubber microporous aeration system can be used for the transformation of the existing system.
Ruihao silicone rubber microporous aeration system has simple installation and low installation cost.