Device and method used for recycling hydrogen from chlor-alkali industry vented tail gas and preparing high purity hydrogen
A technology for the chlor-alkali industry and high-purity hydrogen, which is applied in the development and application of vent gas in the chlor-alkali industry, and can solve problems such as the impact on equipment operation safety
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Embodiment 1
[0055] (1) Chlor-alkali tail gas
[0056] Chlor-alkali tail gas volume: 500m 3 / h Temperature: 25°C Pressure: 1 atmosphere
[0057] Main components: H 2 96%, O 2 3%, Cl 2 ≥100ppm, the rest is a small amount of carbon dioxide, etc.
[0058] (2) Dechlorination agent
[0059] Use caustic soda solution NaOH concentration 2% (mass percentage);
[0060] QT-C1 high-efficiency dechlorination agent (main component: ZnO / Al 2 o 3 / CaO add accelerator, the mass ratio of each component is 40%, 40%, 20%), the use of space velocity: 3000h -1 Total loading: 0.2m 3
[0061] Fine dechlorination tower aspect ratio: 5
[0062] (3) Catalyst
[0063] Catalytic deoxidizer AC-3 type precious metal catalyst (the active component is palladium, the carrier is alumina, the active component accounts for 0.2% of the weight of the carrier)
[0064] Noble metal catalyst use space velocity: 5000h -1
[0065] The total amount of precious catalyst loaded: 0.15m 3
[0066] Catalytic deoxidation ...
Embodiment 2
[0072] (1) Chlor-alkali tail gas
[0073] Chlor-alkali tail gas volume: 1500m 3 / h Temperature: 25°C Pressure: 1 atmosphere
[0074] Main components: H 2 97%, O 2 2%, Cl 2 ≤30ppm, the rest is a small amount of carbon dioxide, etc.
[0075] (2) Dechlorination agent
[0076] QT-C1 high-efficiency dechlorination agent (main component: ZnO / Al 2 o 3 / CaO adds promotor, the same embodiment 1), using space velocity: 3000h -1 Total loading: 0.6m 3
[0077] Fine dechlorination tower aspect ratio: 8
[0078] (3) Catalyst (same as above embodiment 1) noble metal catalyst use space velocity: 5000h -1
[0079] The total amount of precious catalyst loaded: 0.5m 3
[0080] Catalytic deoxidation tower aspect ratio: 6
[0081] (4) steps
[0082] Chlor-alkali tail gas hydrogen (1500m 3 / h) (wherein the chlorine content is less than or equal to 30ppm, and the oxygen content is 2%), the atmospheric pressure hydrogen is pressurized to about 0.03Mpa through the water ring compresso...
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