Strong-strength denitration catalyst and preparation method for same

Abstract

The invention discloses a strong-strength denitration catalyst and a preparation method for the same. The denitration catalyst is prepared from the following raw materials in parts by weight: 80 to 100 parts of titanium dioxide, 20 to 35 parts of silicon dioxide, 8 to 16 parts of tungsten trioxide, 3 to 8 parts of vanadium pentoxide, 1 to 6 parts of expanded perlite, 2 to 7 parts of attapulgite, 1 to 3 parts of hollow glass beads and 1 to 3 parts of polyester fibers. The preparation method for the denitration catalyst comprises preparation of a catalyst substrate, impregnation and adsorption with mixed liquor, and drying and calcination. The denitration catalyst disclosed by the method is strong in compressive strength and cleavage strength, moderate in porosity, low in pulverization and cracking rate, high in catalytic efficiency and long in service life, the using amount is greatly reduced, a preparation process is simple and controllable, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of electric catalysts, in particular to a high-strength denitration catalyst and a preparation method thereof. Background technique [0002] The installed capacity, power generation and coal consumption of my country's thermal power industry are all showing a growing trend, and the resulting nitrogen oxides are increasingly harmful to the environment. According to different catalyst carriers, the catalysts currently on the market for stationary source tail gas denitrification are mainly honeycomb catalysts. The catalyst has low pressure drop, wear resistance and excellent denitrification activity and has been widely used, but the existing honeycomb catalyst has some shortcomings, and its optimum working temperature is generally 300-450 °C. In actual working conditions, it is difficult for the flue gas temperature to reach this temperature range; on the other hand, in order to achieve better denitrification effect and...

AI Technical Summary

Problems solved by technology

The catalyst has low pressure drop, wear resistance and excellent denitrification activity and has been widely used, but the existing honeycomb catalyst has some shortcomings, and its optimum working temperature is generally 300-450 °C. In actual working conditions, it is difficult for the flue gas temperature to reach this temperature range; on the other hand, in order to achieve better denitrification effect and anti-sulfur and water resistance, the honeycomb denitrification catalyst generally has a higher pore density, but in the actual flue gas Contains a large amount of water, sulfur dioxide and dust, which can easily block the catalyst

Therefore, there are still problems such as low catalyst strength, easy pulverization, short service life, low catalytic efficiency, large amount of catalyst, and high cost.

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