|
1¡¢Introduction
BDX8040N-SF series of rolling nanofiltration membrane adopted polyamide and has relatively high desalination rate to remove nitrate, iron, pesticide, weedkiller and THM predecessor.
BDX8040N-SF series is extremely outstanding in the specified concentration and separation. It is widely used to separate, refine and concentrate in drinkingwater,environmental protection, biochemical, food and chemical materials.
2¡¢Specifications
|
Model |
|
BDX8040N-70SF |
BDX8040N-90SF |
|
Capability |
Materials |
polyamide |
|
Average Salt Rejection - % |
NaCl |
35 - 45 |
65 - 75 |
85 - 95 |
| MgSO 4 |
¡Ý88 |
¡Ý 95 |
¡Ý 97 |
|
Permeate Flow - gpd (m3/d) |
9500(36.0) |
10000(38.0) |
8500(32.2) |
|
Error |
¡À 15% |
|
Active Membrane Area ¡ªft2(m2) |
365 ( 36.0 ) |
|
Test Conditions |
Standard Solution |
500 ppm NaCl¡¢ 500 ppm MgSO 4 |
|
Operating Pressure¡ªpsi(MPa) |
100(0.68) |
150(1.0) |
225(1.55) |
|
Recovery Rate of Single Membrane Element |
15% |
|
Temperature¡ª¡æ |
25 |
|
PH Value of Solution |
7 - 8 |
|
Test Time |
Run for 30 minutes |
|
Limiting Conditions |
Max. Feedwater Temperature¡ª¡æ |
45 |
|
Max. Operating Pressure - psi(MPa) |
600 (4.12) |
|
Max. Feedwater Flow - gpm (m3/h) |
16(3.6) |
|
Max. SDI of Feedwater |
5 |
|
Max. NTU of Feedwater |
1 |
|
Concentration of Free Chlorine - ppm |
< 0.1 |
|
PH Value Range of Feedwater as Continuous Operation |
2-11 |
|
PH Value Range of Feedwater as Chemical Cleaning |
1-12 |
|
Max. Pressure Difference of Single Membrane Element - psi(MPa) |
13(0.09) |
|
The minimal proportion of single membrane element's conc press to perm flow |
5 : 1
|
3¡¢Important Informations
3.1 If free chlorine and other oxidable substances exist, the oxidability will destroy the performance when pH £¾10 and the maximum operating temperature keeps at 35¡æ. Thus, users are suggested to remove the free chlorine and other oxidable substances during pretreatment.
3.2 All membranes have been tested before they go out and they are in vacuum package in sodium bisulfate and Kathon WT solution. In extremely cold areas, glycerin (10% concentration) is added as antifreeze fluid. To keep microbe breeding in short stock, delivery and system halt, membrane is suggested to be impregnated in protection solution (prepared with produced water through reverse osmosis), containing 1.0% of sodium bisulfate at food grade.
3.3 You¡¯d better not open the membrane components before use, if so, please keep them moist.
3.4 The pressure should be increased gradually during water input, and the lasting time to normal operating state is at least 30-60 seconds; the speed of input influx should also be added gradually, and the lasting time reaching regulated value is at least 15-20 seconds.
3.5 When it is first used, the system produced water need discharge for at least 1 hour.
3.6 Membrane is disinfected with only after 6 hour use, otherwise, it may cause flux loss.
3.7 The back pressure of produced water at anytime should be within 0.03MPa and the maximum pressure drop is within 50psi(0.34MPa).
3.8 If there is problem with membrane caused by wrong operation, such as operating conditions and the limiting used conditions, we have no responsibility to guarantee the 3-year quality.
3.9 There is problems with membrane caused by customers¡¯ mixing membrane with chemical agents, lubricants or protection solution, etc which are not compatible, we have no responsibility to guarantee the 3-year quality.
4¡¢Sizes Dimensional Unit : Inch (mm)
5¡¢Notice
The Relevant data and information on products provided by Beidouxing is only for reference. Users have responsibility to ensure its applicability and safety according to their own purposes. All the data and information is accurate. Thus we have no legal responsibility as well as any guarantee, for the operating ways and conditions can not controlled by Beidouxing.
Information mentioned above all might be emended anytime because of updating of technology and products, we will not give announcement in advance.
|
