Ceramic catalyst carrier

Abstract

The invention belongs to the field of catalysts and particularly relates to a ceramic catalyst carrier. The ceramic catalyst carrier comprises a support frame, wherein herringbone ceramic wave plates are arranged in the support frame side by side and comprise first ceramic wave plates and second ceramic wave plates; hair-shaped ceramic bars are arranged on the first ceramic wave plates and the second ceramic wave plates, and are respectively vertical to the first ceramic wave plates and the second ceramic wave plates. According to the ceramic catalyst carrier, the time for smoke to pass through the surface of the catalyst is prolonged; the clogging rate and the dust carrying rate are reduced, the pressure drop is small, security risks of a boiler main engine and an induced draft fan are reduced; the ceramic catalyst carrier is high in mechanical strength and is corrosion-resistant and wear-resistant, the repair rate of the catalyst is reduced, the service life is prolonged, and the use cost is lowered; the ceramic catalyst carrier is exclusively used in the atmospheric environment treatment.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a ceramic catalyst carrier. Background technique [0002] Thermal power plants are the main source of nitrogen oxide air pollution emissions. At present, there are roughly four main methods to reduce NOX emissions from coal-fired boilers in thermal power plants in the world: 1. Low-nitrogen combustion technology, that is, to control the formation of nitrogen oxides during the combustion process, which is mainly applicable to large-scale coal-fired boilers. low NO X Combustion technology can only reduce NO X 30-50% of the emission value. 2. Selective catalyst reduction technology (SCR), mainly used in large coal-fired boilers, is currently the most widely used flue gas denitrification technology in my country. 3. Selective non-catalyst reduction technology (SNCR), which is mainly used in small and medium-sized boilers such as waste incineration, has mature technology, but ...

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Problems solved by technology

3. Selective non-catalyst reduction technology (SNCR), mainly used in small and medium-sized boilers such as waste incineration, the technology is mature, but its efficiency is lower than that of the SCR method, the investment is small, and the construction period is short

About 20-25% of the exhaust smoke generated in the furnace falls between the furnace and the air preheater. Taking the honeycomb catalyst as an example, if the catalyst gap is too small, it will cause fly ash to block, thereby preventing the flue gas and Catalyst contact, reduced efficiency, increased wear

And increasing the pore size will reduce the contact area between the flue gas and the catalyst, reducing the denitrification efficiency

The denitrification efficiency of the flue gas denitration device is affected by the uniformity of the flue gas flow velocity distribution and the reducing agent ammonia (NH 3 ) / nitrogen oxides (NO X ) Mixing uniformity has a great influence, such as uneven flow rate distribution, or uneven mixing of ammonia gas / nitrogen oxides, which will greatly reduce the denitrification efficiency, cause ash blocking, and even cause the boiler to trip and shut down, which will bring a negative impact on the safety of the power plant. also cause great economic losses

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