Membrane-based sulfur dioxide absorption compound collector
A sulfur dioxide and composite technology, applied in the field of liquid-gas separation and flue gas desulfurization, achieves the effects of high desulfurization rate, low viscosity and low price
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Embodiment 1
[0025] The evaluation method of the capture and absorption performance of the membrane-absorbed sulfur dioxide composite collector.
[0026] Operating conditions: room temperature (19-22°C), mixed gas pressure 0.11MPa, membrane mass transfer area 1.5 m 2 , the gas flow rate is 0.5-2 L / min, and the liquid flow rate is 200-500mL / min.
[0027] Such as figure 1 shown, respectively from N 2 Gas cylinder 1-1 and SO 2 After the gas in the gas cylinder 1-2 is measured by the gas quality control instrument 2, it enters the mixing and stabilizing tank 3 to form SO containing 0.1%-0.6% (volume percentage). 2 Mixed gas, the mixed gas after the air flow is stabilized enters the membrane contactor 4, and the SO in the mixed gas 2 It diffuses to the other side of the membrane through the membrane pores, is absorbed by the composite collector, and enters the liquid phase. The absorbed gas phase is released from the gas outlet at the other end of the membrane contactor. The composite colle...
Embodiment 2
[0037] In this embodiment, the membrane-absorbing sulfur dioxide composite collector is an aqueous solution of potassium citrate / sodium citrate and glycinate, and the total concentration of potassium citrate / sodium citrate and glycinate in the aqueous solution is 0.1~3.0mol / L , the molar ratio of potassium citrate / sodium citrate to glycinate is 1: (0.5~2.5).
[0038] In this embodiment, the glycinate may be sodium glycinate, potassium glycinate or a mixture of sodium glycinate and potassium glycinate.
[0039] The performance evaluation method in Example 1 is used for detection.
[0040] Process operating conditions: room temperature, gas phase pressure 0.11MPa, mixed gas SO 2 Content 0.1%-0.6% (volume percentage), membrane mass transfer area 1.5m 2 , gas velocity: 0.5-2L / min, liquid velocity: 200-500mL / min.
[0041] The performance evaluation results of various desulfurizers under various conditions are shown in Table 1.
[0042] Table 1 Performance evaluation results of ...
Embodiment 3
[0047] The aqueous organic acid salt solution used to separate sulfur dioxide in the mixed gas is an aqueous solution of potassium citrate / sodium citrate and β-alanine salt, and the total concentration of potassium citrate / sodium citrate and β-alanine salt in the aqueous solution 0.1~3.0mol / L, the molar ratio of potassium citrate / sodium citrate to β-alanine salt is 1:(0.5~2.5).
[0048] In this embodiment, the β-alanine salt can be sodium β-alanine, potassium β-alanine or a mixture of sodium β-alanine and potassium β-alanine.
[0049] The performance evaluation method in Example 1 is used for detection.
[0050] Process operating conditions: room temperature, gas phase pressure 0.11MPa, mixed gas SO 2 Content 0.1%-0.6% (volume percentage), membrane mass transfer area 1.5m 2 , gas velocity: 0.5-2L / min, liquid velocity: 200-500mL / min.
[0051] The performance evaluation results of various desulfurizers under various conditions are shown in Table 2.
[0052] Table 2 Performan...
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