We are the hot sales bipolar membrane electrodialyzer BPED manufacturer in China

Principle Introduction
The bipolar membrane is a layered membrane with a cation exchange layer on one side and an anion exchange layer on the other side. The junction between the cation exchange layer and the anion exchange layer is a water layer. It is split into H+ and OH- and passes through the cation exchange layer and the anion exchange layer respectively. Bipolar membranes are the key components of bipolar membrane electrodialysers (BPEDs). BPED is an electrodialysis device that uses bipolar membranes to dissociate water and the selective permeability of anion and cation exchange membranes to convert salts into acids and bases. The principle is shown as follow:
Skid-Mounted-Electrodialyzer
Under the action of the DC electric field, the ions in the solution migrate in a direction, the cations in the salt chamber pass through the cationic membrane, are blocked by the cathode layer of the bipolar membrane and stay in the alkali chamber, and at the same time, the bipolar membrane dissociates the OH- after passing through the cathode layer of the bipolar membrane, it is blocked by the anode membrane and stays in the alkali chamber, so that alkali is produced in the alkali chamber; the anions in the salt chamber pass through the cathode membrane and are blocked by the anode layer of the bipolar membrane and stay In the acid chamber, at the same time, the H+ generated by the dissociated water of the bipolar membrane passes through the anode layer of the bipolar membrane and is blocked by the cathode membrane and stays in the acid chamber, so that acid is generated in the acid chamber, since the ions of the salt chamber solution migrate outward, the desalination effect is achieved over time.

Skid-Mounted-Electrodialyzer
List of main equipment of electrodialyzer for pilot

Item

No.

Name

Type

Material

Tanks

1

water supply tank

V=10m³

PE

2

water production tank

V=10m³

PE

3

water tank for polar water

 

PE

4

water tank for cleaning

3m³

PE

Membrane stack

5

Membrane stack

ABCM-8040/200

 

Pump

6

Circulating pump

Q=20m³/h,H=20m,

FRPP

7

Efflux pump

Q=10m³/h,H=20m

FRPP

8

Circulating pump for polar water

Q=10m³/h,H=20m,

FRPP

9

Pump for cleaning

Q=50m³/h,H=20m,

FRPP

Heat Exchanger

10

Material heat exchanger

A=5m2

TI

11

Polar water heat exchanger

A=5m2

TI

Filter

12

Security Overthinker

50m³/h,1um

 

Security Overthinker

20m³/h,1um

 

Security Overthinker

8m³/h,1um

 

meter

13

conductivity meter 1

0~500ms/cm,4~20mA

 

14

conductivity meter 2

0~200ms/cm,4~20mA

 

15

Electromagnetic Flowmeter

DN40

 

Turbine flowmeter

DN40

 

16

Pressure Transmitters

0~0.2MPa

 

17

Temperature Transmitter

0~50℃

 

18

Pressure gauge

0~0.2MPa

 

19

Level gauge

0~3m

 

20

PH meter

 

 

21

Pneumatic valves

DN100、DN65

 

Pipe and valve

22

Pipe and valve

Pipe fittings, pneumatic valves, manual valves

 

Exhaust system

23

Exhaust system

Exhaust pump, instrument, pipe valve

 

electric

24

High frequency power supply

 

 

25

PLC

Including control system

 

Characteristics of Bipolar Electrodialyzer BPED

  • Energy saving and environmental protection, a new generation of acid-base technology;
  • splitting water into H+ and OH- at low voltage;
  • The acid and alkali are formed from inorganic salts and organic acid salts in a single process, and the process is simple and clean;
  • The concentration of acid and alkali produced is controllable and adjustable;
  • no redox reaction occurs except for the electrodes at both ends, and no by-products are produced;
  • Each chamber does not require electrodes, and the amount of gas generated is small. The investment cost and operating cost account for only 40 to 50% of the electrolysis method.
  •  

    Applications Area:

    1, Preparation of acid and bases from inorganic salts (such as sodium sulfate, sodium chloride, lithium chloride, etc.)
    2, Production of organic acids (such as gluconic acid, lactic acid, malic acid, succinic acid, etc.)
    3, Production of organic bases (such as ornithine, lysine, arginine, histidine, etc.)

    Inlet water requirement of Bipolar ion exchange membrane electrodialysis:

    1) Suspended matter ≤1mg/L, needs to be filtered through a membrane with an absolute pore size of less than 0.05 microns;
    2) Iron ≤0.2mg/L;
    3) Si ≤10mg/L;
    4) Oily and other poorly water-soluble organic matter ≤0.1mg/L;
    5) Pollution Index (SDI) <3
    6) Water temperature: 15~40℃, Optimal operating temperature: 25-35℃;
    7) Does not contain post-flocculation substances, that is, substances that will accumulate flocculation or fouling in the membrane module;
    8) Total concentration of polyvalent metal ions(including but not limited to calcium magnesium zinc iron, etc.) ≤1mg/L
    9) Free residual chlorine less than 0.1mg/L, other oxidizing substances can be converted into free residual chlorine

    Performance Introduction of SYABCM8040-50

    200 pieces of bipolar ion exchange membrane,anion-exchange membrane and cation-exchange membrane for each.
    The effective area of each membrane is 12.5 m2.
    Current Density: 500A/m2
    Under standard operating conditions, the conversion efficiency of the membrane stack is as follows(Other salts can be calculated according to the corresponding equivalent molar mass):

    Name 
    Reaction Formula
    Processing     Capacity 
    Power    Consumption
    NaCl
    H2O+NaCl→HCl+NaOH
    7.5
    1.5
    Na2So4
    Na2SO4+H2O→H2SO4+NaOH
    9.1
    1.2
    LiCl
    LiCl+H2O→LiOH+HCl
    5.45
    2.1
    Li2SO4
    Li2SO4+H2O→H2SO4+LiOH
    7.1
    1.6
    NaNO3
    NaNO3+H2O→HNO3+NaOH
    10.9
    1.1
    Usually the acid-base equivalent concentration is 1N, and the acid-base concentration can be further increased by changing the operating conditions.





Our Mission

Continuously provide the Ion-Exchange Membrane with lower energy consumption and excellent performance for Green Energy and Chlor-Alkali Industries
Continuously improve the technology of environmentally friendly

Contact Us

 Dongfeng Street, Weifang Shandong China

 (0086) 536-821-6345