Denitration device for reducing ammonia escape and coal-fired boiler system

Abstract

The invention provides a denitration device for reducing ammonia escape and a coal-fired boiler system. The denitration device for reducing ammonia escape comprises a reactor which is connected with aflue gas channel and an ammonia gas injection device, wherein a plurality of layers of catalyst bin grids are arranged in the reactor; a catalyst is arranged in each catalyst bin grid, a catalyst bingrid gap is formed between any two adjacent catalyst bin grids, and an ammonia escape prevention structure is arranged on each catalyst bin grid gap; each ammonia escape prevention structure comprises a sealing part, the sealing part is configured to be inserted into one catalyst bin gap to seal the catalyst bin grid gap, the maximum width of the sealing part is equal to the width of the catalystbin grid gap, and the length of the sealing part is equal to the length of the catalyst bin grid gap; protrusions are arranged on the two sides of the upper end of each sealing part and used for supporting the sealing part; and a flow guiding part is further arranged at the upper end of each sealing part and is used for guiding flue gas conveyed from the flue gas channel into the catalyst bin grid.

Description

technical field [0001] The disclosure belongs to the technical field of coal-fired boilers equipped with denitrification devices, and in particular relates to a denitrification device and a coal-fired boiler system for reducing ammonia escape. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Coal prices continue to rise, causing large areas of power generation companies to suffer losses. After the marketization of electricity coal prices, coal prices have risen far more than electricity prices. The price of electricity and coal has seriously troubled the production and operation of the company. In order to get out of the loss-making predicament, purchasing low-quality economical coal is an inevitable means of turning losses into profits. Therefore, blending medium and high-sulfur coal is the choice of many enterprises. Blending medium- a...

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Problems solved by technology

The blockage of the air preheater caused unsafe incidents of boiler equipment and abnormal load limit of the unit, which brought safety and economic impact to the enterprise

[0004] The inventors found that currently most power plants are only in the state of high-pressure water flushing for air preheater blockage treatment, and have not considered the effects of catalyst compartment gap, nozzle blockage of ammonia gas injection device, and catalyst activity on ammonia escape. , cannot solve the clogging problem of the air preheater quickly and in a targeted manner

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