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Method for preparing ceramic regulation catalytic filling for sea water desulfuration

A technology of catalytic packing and structured packing, applied in the field of preparation of catalytic packing, can solve the problems of poor acid and alkali corrosion resistance, short service life, low desulfurization efficiency, etc. The effect of absorption efficiency

Inactive Publication Date: 2011-08-10
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional seawater desulfurization process, ordinary plastic random packing is usually used in the tower, which has the disadvantages of low desulfurization efficiency, short service life, poor acid and alkali corrosion resistance, and high temperature resistance.

Method used

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  • Method for preparing ceramic regulation catalytic filling for sea water desulfuration
  • Method for preparing ceramic regulation catalytic filling for sea water desulfuration
  • Method for preparing ceramic regulation catalytic filling for sea water desulfuration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Ceramic structured packing (250Y type ceramic packing, provided by Jiangxi Anyuan Chemical Packing Co., Ltd.) was diluted with 15% (V / V) HNO 3 After treatment, immerse in 400 mL of MnSO with a concentration of 0.9 mol / L 4 In the solution, immerse for 8 hours under stirring at 60°C, then add saturated (NH 4 ) 2 CO 3 The total solution is 360mL. Then the 250Y filler covered with precipitation was taken out from the precipitation solution and aged at 40°C for 6 hours, washed with deionized water, and dried at 120°C for 4 hours to prepare for modification. K with a concentration of 0.1mol / L 2 CO 3 The solution was treated at room temperature for 3 hours, then dried at 120°C for 3 hours, and calcined at 350°C for 3 hours to obtain a loaded 5.8% MnO 2 Modified 250Y ceramic catalytic packing, No. AYC-OUCL-01.

Embodiment 2

[0016] A piece of ceramic structured packing (250Y type ceramic packing, provided by Jiangxi Anyuan Chemical Packing Co., Ltd.) was subjected to 15% (V / V) dilute HNO 3 After treatment, immerse in 200mL of MnSO with a concentration of 0.9mol / L 4 With 200mL of FeSO with a concentration of 0.9mol / L 4 In the mixed solution, immerse for 8 hours under stirring at 60°C, then add saturated (NH 4 ) 2 CO 3 The total solution is 360mL. Then the 250Y filler covered with precipitation was taken out from the precipitation solution and aged at 40°C for 6 hours, washed with deionized water, and dried at 120°C for 4 hours to prepare for modification. K with a concentration of 0.1mol / L 2 CO 3 The solution was treated at room temperature for 3 hours, then dried at 120°C for 3 hours, and calcined at 350°C for 3 hours to obtain a loaded 2.9% MnO 2 , 5.3% Fe 2 o 3 Modified 250Y ceramic catalytic packing, No. AYC-OUCL-02.

Embodiment 3

[0018] 2 pieces of AYC-OUCL-01 modified ceramic catalytic fillers (total height 20cm) prepared in Example 1 are packed in the bottom of the seawater desulfurization absorption tower, and 5 pieces of industrial 250Y ceramic structured packing (total height 50cm) are loaded on it, and the packing layer The total height is 70cm. seawater flue gas SO 2 Removal reaction. The seawater temperature entering the tower is 30°C, the seawater flow rate is 20, 40, 60, 80L / h respectively, and the corresponding liquid-gas ratio is 4.0, 6.0, 7.0, 8.0L / Nm 3 . Simulated flue gas flow into the tower: 10Nm 3 / h, flue gas SO 2 The concentration is 2100mg / m 3 , SO 2 The results of the removal reaction are shown in Table 1.

[0019] Table 1 AYC-OUC-01 catalytic filler SO 2 Comparison of removal rate

[0020]

[0021] It can be seen that the absorption efficiency of the absorption tower equipped with partially modified ceramic catalytic packing is 4-15% higher than that of the unmodified ...

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Abstract

The invention discloses a method for preparing ceramic regulation catalytic filling for sea water desulfuration, which is characterized by comprising the flowing steps: processing ceramic regulation catalytic filling by diluted acid, then dipping the ceramic regulation catalytic filling into mixed solution of MnSO4 solution with the concentration of 0.7-1.5 mol / L or the MnSO4 solution with the concentration of 0.5-1.0 mol / l with the FeSO4 with the concentration of 0.3-0.5 mol / L, and dipping and stirring the filling for eight hours in the constant temperature of 60 DEG C, then dripping supersaturation (NH4)2CO3 solution, taking out the filling which is covered with deposition from deposition solution and aging the filling for 4-8 hours in the temperature of 30 DEG C-50 DEG C, drying the filling for 3-5 hours in the temperature of 120 DEG C after washing the filling by deionized water, processing the filling for 2-4 hours under the condition of room temperature by K2CO3 with the concentration of 0.7-1.2 mol / L, and drying the filling for 2-4 hours in the temperature of 100-150 DEG C, and then baking the filling for 2-4 hours in the temperature of 300-450 DEG C, thereby modified ceramic regulation catalytic filling is prepared.

Description

technical field [0001] The invention relates to a preparation method of catalytic packing, in particular to a preparation method of catalytic ceramic structured packing which can be used for seawater flue gas desulfurization packing absorption tower. Background technique [0002] According to the Atmospheric Environment Announcement of the State Environmental Protection Agency, in 2004, my country's sulfur dioxide emissions were 22.549 million tons; in 2005, my country's sulfur dioxide emissions were 25.49 million tons, an increase of 27% over 2000, and the total emissions ranked first in the world. In 2006, it increased by 1.8% compared with 2005. Atmospheric SO 2 The capacity index is 474 tons, which actually exceeded 4.6 times by 2006. Taking thermal power as an example, the Eleventh Five-Year Period is an important period for construction and system reform, and it is also an important period for thermal power plants to control SO 2 critical moment. It is estimated th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/32B01J23/34B01J23/889B01J37/03B01J32/00B01D53/78B01D53/86B01D53/50
Inventor 李春虎卞俊杰张静伟冯丽娟徐海波于英明侯影飞赵文强
Owner OCEAN UNIV OF CHINA
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