Item |
Numerical value |
Temperature (℃) |
40-50 |
PH value |
>11 |
Surface tension (mN/m) |
≥50 |
Ammonia nitrogen(mg/L) |
2000-5000 |
COD(mg/L) |
10000-30000 |
Table 2: Effluent quality of ammonia nitrogen removal system with PTFE hollow fiber membrane
Item |
Numerical value |
Ammonia nitrogen(mg/L) |
≤100 |
4) Brief description of process flow
ECO advanced oxidation pretreatment effluent → sand filter → precision filter → heat exchanger → pipe mixer (adding alkali point) → bag filter → raw water buffer tank → raw water pump → security filter → PTFE hollow fiber membrane deamidation device (three-stage tandem) → produced water buffer tank → produced water pump → produced water tank → subsequent treatment.
ECO advanced oxidation pretreatment water first into the sand filter, precision filter to remove suspended solids into the heat exchanger for cooling, down to 40 ~ 50 ℃, while adding alkali to make the pH> 11, then into the bag filter to further remove suspended solids, and then into the raw water buffer tank, the raw water pump upgraded to the primary, secondary, tertiary PTFE hollow fiber membrane deamidation device, to protect the PTFE hollow fiber membrane In order to protect the PTFE hollow fiber membrane de-ammonia device in the original water pump after the installation of security filters, PTFE hollow fiber membrane de-ammonia device to deal with ammonia nitrogen-qualified wastewater into the production of water buffer tanks, followed by the production of water pumps to the production of water tanks, and then by the pumps to the subsequent treatment section.
5)Auxiliary system
PTFE hollow fiber membrane deammonia nitrogen removal system needs to be supported by alkali system, acid recycling system, ammonium salt disposal system, cleaning system and so on.
One of the cleaning is to ensure that the PTFE hollow fiber membrane deammonia device deammonia effect and the service life of the key means, PTFE hollow fiber membrane can be backwashed, renewable, long service life.
PTFE hollow fiber membrane deammonia nitrogen system sent to the original evaporation equipment evaporation and crystallization, the formation of solid ammonium salts, and sold to achieve resource utilization.
6) PTFE hollow fiber membrane deammonia device
Device size: 4400 (L) × 1300 (W) × 2050 (H) mm;
Number of stages: three-stage tandem;
Quantity: 1 set;
Membrane quantity: 8pcs/stage;
Membrane external size: 8"×40";
Membrane material: shell PVC-U, head epoxy resin, membrane wire PTFE hollow fiber membrane.