Membrane deaerator

The working principle of membrane deaerator:

Edgecross ™ membrane deaerator uses microporous hollow fiber membrane to remove oxygen from water.

In a typical operation, water flows outside the hollow fiber filament, while the hollow fiber filament is vacuum pumped or gas purged, or both are combined.

        The hydrophobically treated hollow fiber filaments have many micro-holes on the surface, which allow gas molecules to pass through, but can prevent water molecules from penetrating. Under the negative pressure of vacuum or gas purging, the dissolved gas in the water outside the hollow fiber membrane filament moves continuously to the inside of the hollow fiber membrane filament through the micropore, and is taken away by the vacuum or purging gas, so as to achieve the purpose of removing the dissolved gas in the water.

Advantages of Edgecross™ Membrane Deaerator:

1) No need of enhanced base support Edgecross™ Membrane Deaerator’s total weight is much lighter than thermal deaerator, so normal base construction is enough; 

2) No need of high position installation

Edgecross™ Membrane Deaerator can be installed directly on ground;

3) No need of hot steam for deoxygenation Edgecross™ Membrane Deaerator works under normal temperature;

4) Low energy consumption

Energy consumption of Edgecross™ Membrane Deaerator comes from vacuum pump and sweep N2;

5) High removal efficiency for Dissolve Oxygen

Keep stable at 7ppb level of outlet water;

6) Small footprint

Easy to install, operate and maintain; 

7) Modular design, can be extended very easily

Take the boiler with 50 tons/hour evaporation as an example, the equipment investment of membrane deaerator can be recovered by saving energy in one year.

DEOXIDATION COMPONENT PARAMETER TABLE
	ETO-2.5X8	ETO-6X14	ETO-6X28	ETO-10X28	ETO-12X28
Diameters of membrane shell	2.5吋/63mm	6吋/150mm	6吋/150mm	10吋/250mm	12吋/315mm
Film Shell Material	PP	UPVC	UPVC/PP	UPVC/PP	UPVC
Component Length	305mm	780mm	1186mm	1186mm	1186mm
Component weight	0.5kg	7kg	10kg	25kg	90kg
Membrane area	0.4m2	10m2	40m2	88m2	176m2
Filament Material	Modified PP	Modified PP	Modified PP	Modified PP	Modified PP
Membrane filament inner/outer diameter	0.2/0.3mm	0.2/0.3mm	0.2/0.3mm	0.2/0.3mm	0.2/0.3mm
Processing capacity	0.1~0.5m3/h	0.2~1m3/h	1~6m3/h	6~15m3/h	15~30m3/h
Pressure loss	0.01~0.03MPa	0.01~0.04MPa	0.02~0.05MPa	0.02~0.05MPa	0.02~0.05MPa
Standard removal rate	75~90%	75~90%	78~95%	78~95%	78~95%
Series series	≦Level 2	≦Level 2	≦Level 4	≦Level 4	≦Level 4
DO reachable	<5ppb	<5ppb	<5ppb	<5ppb	<5ppb
Use pressure	≦0.6MPa	≦0.6MPa	≦0.6MPa	≦0.6MPa	≦0.6MPa
Service temperature	5~35℃	5~35℃	5~35℃	5~35℃	5~35℃
Using PH	5~9	5~9	5~9	5~9	5~9
Use surface tension	≧65mN/m	≧65mN/m	≧65mN/m	≧65mN/m	≧65mN/m
Matters needing attention:	1. The module is only suitable for deoxidization of clean water, COD < 50 ppm, SS < 5 ppm. 2. Even if COD in water is less than 50 ppm, the surface tension may still be less than 65 mN/m, resulting in membrane infiltration. Therefore, the detection of surface tension is necessary before use. 3. The water should not contain oxidizing substances, such as hypochlorite, hydrogen peroxide, etc. ORP < 100 is required, otherwise the life of the membrane will be affected. 4. When used for a long time, the organic and mineral substances in water will cause membrane fouling, which will affect the removal and hydrophobic properties of the membrane. It should be cleaned regularly and restored. Cleaning methods can be referred to the "Ejik Membrane Cleaning Guide" and carried out under the guidance of Ejik engineers.