The design life of the bag filter bag of the bag filter is generally 6 years. After the design life is reached

it is prone to aging

wear

and severe dust accumulation on the cabinet

which affects the quality of flue gases emission. In order to ensure the stable and efficient operation of the bag filter

the filter bag of a household wastes incineration power plant with a service life of 4 years was replaced and a standard process of filter bag maintenance was established. Before and after filter bag replacement and maintenan

ce

we collected flue gases samples from No.1 and No.2 incineration lines to analyze flue gases particulate matter

SO

2

HCl

CO and other indicators. The results show that the flue gases emissions before and after the replacement and maintenance can reach the limits of the "Standard for pollution control on the municipal solid waste incineration"（GB 18485—2014）

but the average mass concentrations of flue gases particulate matter

SO

2

HCl and CO decrease respectively after replacement and maintenance 80.23%

35.71%

57.23%

60.29%

the multiples of particulate matter and HCl negative exceedance increased by 42.17% and 20.11% respectively

and atmospheric environmental protection taxes and fees fell by 51.36%. It can be seen that the flue gases emissions before and after replacement and maintenance can meet the emission standards

but in order to achieve regional atmospheric environmental quality improvement and maximize environmental benefits

it is necessary to replace the dust collector filter bag in time and adopt effective maintenance methods before reaching the design life.