Coke oven gas Methanation produce LNG

Gas analysis in the petrochemical production process, which has high requirement to the measurement accuracy, explosion safety, quick response and long-term reliability of the complete on-line analysis system, and the interference of background gas on the measurement gas should also be considered.

 

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On-line gas analysis system diagram

Coke oven gas Methanation produce LNG

Analyzer configuration to LNG producing by coke oven gas Methanation

Item

Detect point / Analyzer configure

Measured gas / Measure range

Analyzer configuration QTY

1

External coke oven gas

Laser oxygen analyzer

O2  /  0 ~ 2.0 %

2

2

Outlet of coke oven gas's tank

Laser oxygen analyzer

O2  /  0 ~ 2.0 %

1

3

Mixed feed gas at the inlet of first stage

H2 analyzer

H2  /  30 ~ 60 %

1

4

Mixed feed gas at the inlet of first stage

CH4 analyzer

CH4  /  30 ~ 60 %

1

5

Mixed feed gas at the inlet of first stage

CO analyzer

CO  /  0 ~ 10 %

1

6

Mixed feed gas at the inlet of first stage

CO2 analyzer

CO2  /  0 ~ 10 %

1

7

Reaction gas at the outlet of first stage

CO2 analyzer

CO2  /  0 ~ 2.0 %

1

8

Reaction gas at the outlet of first stage

CH4 analyzer

CH4  /  40 ~ 70 %

1

9

Cycle gas at the outlet of V3105

CO2 analyzer

CO2  /  0 ~ 2.0 %

1

10

Cycle gas at the outlet of V3105

CH4 analyzer

CH4  /  50 ~ 80 %

1

11

Cycle gas at the outlet of V3106

CO2 analyzer

CO2  /  0 ~ 100 ppm

1

12

Cycle gas at the outlet of V3106

CH4 analyzer

CH4  /  50 ~ 80 %

1

13

Dry purified gas  CH4 analyzer

CH4  /  50 ~ 80 %

1

14

Dry purified gas  H2 analyzer

H2  /  10 ~ 30 %

1

15

Dry purified gas  dew point analyzer

H2O /  -110 ~ 20℃

1

16

Feed gas at the inlet of cold box

CO2 analyzer

CO2  /  0 ~ 100 ppm

1

17

Feed gas at the inlet of cold box

H2O content analyzer

H2O /  -100 ~ 20℃

1

18

Analysis of the feed gas composition

CH4  /  0 ~ 100 %

C2H6  /  0 ~ 2 %

H2 /  0 ~ 40 %

N2 / 0 ~ 20 %

1

19

Analysis of product gas CH4

CH4  /  90 ~ 100 %

1

20

Analysis of H2O content in cryogen

H2O /  -100 ~ 20℃

1

21

Analysis of the cryogen composition

CH4  /  0 ~ 100 %

C2H4  /  0 ~ 50 %

C3H8  /  0 ~ 50 %

i – C5H12  /  0 ~ 50 %

N2  /  0 ~ 20 %

1