Municipal solid waste incineration plant SCR low-temperature denitration catalyst on-line regeneration system and regeneration method thereof

Abstract

The invention discloses a municipal solid waste incineration plant SCR low-temperature denitration catalyst on-line regeneration system and a regeneration method thereof. The regeneration system comprises a regeneration blower fan, a heating electric furnace and a SCR reaction tower. An inlet of the regeneration blower fan is connected to an outlet of a deduster through a pipeline. An outlet of the regeneration blower fan is connected to an inlet of the heating electric furnace, an outlet of which is connected to an inlet of the SCR reaction tower through a pipeline. An outlet of the SCR reaction tower is connected to an inlet of the deduster through a pipeline. A predetermined amount of flue gas is drawn off from the outlet of the deduster by the utilization of the regeneration blower fan; and the flue gas is circularly heated by the utilization of the heating electric furnace until the flue gas is heated to 250-450 DEG C; and after the status is maintained at the temperature for 12-56 h so as to complete the catalyst regeneration. The regeneration method provided by the invention is simple to operate, and is energy-saving and environmentally-friendly. There is no need to dismounta catalyst module for regeneration at different locations, and power consumption of the electric furnace and pollution emission amount are also can be reduced.

Description

technical field [0001] The invention relates to the technical field of activity recovery of an SCR denitrification catalyst in a domestic waste incineration plant, in particular to an online regeneration system and a regeneration method for an SCR low-temperature denitrification catalyst. Background technique [0002] According to statistics, as of the end of November 2017, the total number of waste incineration plants that have been put into operation, under construction and under construction in my country exceeds 610, of which more than 260 are in operation, and there will be a large number of waste incineration plants under construction in the next few years The incineration plant was put into operation. Because of its ability to efficiently dispose of domestic waste, waste incineration plants provide an effective way to solve the plight of the city surrounded by waste. At the same time, with the gradual spread of waste incineration plants, the NIMBY effect of waste inci...

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Problems solved by technology

After the catalyst has been running for a certain period of time, most of the modules are disassembled and transported back to the original factory for regeneration, which is time-consuming and costs a lot for disassembly and transportation

Publication No. CN 106492887A discloses an on-line regeneration method. The catalyst is cleaned by introducing saturated steam into the SCR tower. The steam consumption of this method is relatively large, and the cleaning effect is not high; A system for heating flue gas to achieve online regeneration. This method is more complicated and cannot be implemented if there is no gas in the plant.

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