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Products and services

Membrane separation unit system

Electrodialysis membrane reactor

1.ED membrane
Theory:
ED membrane reactor uses anion and cation exchange membrane arranged alternately between positive and negative electrodes and separated by a special separator to form two systems of desalination and concentration. When brine is supplied to the compartment, the cation migrates to the cathode under the action of the dc electric field and can only pass through the cation exchange membrane. The anions migrate to the anode and can only pass through the anion exchange membrane, thus desalting the brine in the light chamber and concentrating the brine in the thick chamber.


Application:
 Mainly used for material desalting or salt concentration

2.EDR membrane reactor
Theory
 EDR is called frequent inverted electrodialysis. The theory of EDR is basically the same as that of ED. The main reason is the scaling problem of ED technology, which leads to its limitations. EDR reverses the polarity of the positive and negative electrodes at regular intervals, and the concentrated water compartment and fresh water compartment change accordingly to minimize film scaling and deposition of colloidal substances on the film surface. Destroy newly formed deposits and wash them off before they become hazardous to the film. Automatic cleaning of dirt formed on ion-exchange membrane and electrode surface to ensure long-term stable operation of EDR system.
Application
 Mainly used for desalting brackish water.

3.Product parameters

No.

Items

ED membrane reactor

EDR membrane reactor

1

Diaphragm size

102cm×46cm

102cm×46cm

2

Single pair effective membrane area

0.32m2

0.32m2

3

Membrane pairs

150 pairs

600 pairs

4

Membrane reactor effective membrane area

48 m2

192 m2

5

negative plate

Stainless steel

Metal coated electrode

6

Positive plate

Metal coated electrode

Metal coated electrode

7

Pipeline equipment

FRPP

FRPP

8

Equipment framework

Carbon steel spray paint

Carbon steel spray paint

4.Membrane reactor design and production features

  • The special feed design at both ends enables the membrane reactor to have stable fluid flow and pressure.
  • Flexible and reliable membrane reactor design makes it easy to maintain, clean, disassemble, and replace components. Spare parts are easy to store.
  • Flexible membrane reactor design and processing capacity, can be customized according to customer needs, the appropriate size of membrane reactor.

5.Feed requirements
ED and EDR membrane reactor feed parameters

 

No.

Items

ED membrane reactor

ED membrane reactor

1

temparature

4-60℃

4-60℃

2

TDS

10000-50000 mg/L

200-10000mg/L

3

Operation pressure

1-2 bar

1-2 bar

4

active SiO2

<50mg/L

<50mg/L

5

turbidity

<1 NTU

<2 NTU

6

TOC

<60 mg/L

<60 mg/L

7

COD

<200 mg/L

<200 mg/L

8

Oil content

<1 mg/L

<2 mg/L

9

Fe

≤0.3 mg/L

≤0.3 mg/L

10

Mn

≤0.1 mg/L

≤0.1 mg/L

11

Al

≤0.1 mg/L

≤0.1 mg/L

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