Disposal technology and pollution control of directly mixed incineration of municipal sludge in municipal solid waste incineration plant
YU Jie1,,, YU Hongxia2, DU Yipeng1, FU Haixia1, PENG Yingdeng1 1.Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China 2.Beijing Environmental Impact Assessment Center, Beijing 100161, China
Abstract:In order to study the effective disposal method of municipal sludge, and avoid the secondary pollution of organic matter, nitrogen, phosphorus, heavy metal, bacteria and pathogenic bacteria in the sludge to the environment, the disposal technology of mixed incineration of municipal sludge and rubbish in municipal solid waste incineration plant was explored. The results show that the direct combustion of 12.5% municipal sludge had no significant impact on the amount of municipal solid waste into the incinerator, the stability of the incinerator and the emission of pollutants. According to the flue gas monitoring results of mixed incineration of municipal sludge, although the discharged pollutant concentrations slightly increased after directly mixed incineration of municipal sludge, they all could meet the emission requirements. The amount of produced solid waste before and after mixed incineration showed slightly change, and did not result in effect on the surrounding environment. It is technically feasible for directly mixed incineration of a certain proportion of municipal sludge (moisture content 80.0%) in a municipal solid waste incineration plant, which can provide new ideas for municipal sludge disposal. Key words:municipal sludge/ municipal solid waste/ incineration/ directly mixed incineration.
图1额定工况下总入炉量和生活垃圾入炉量的变化 Figure1.Change of total charging capacity and municipal solid waste charging capacity under rated condition
表1掺烧城市污泥所占混合试样的比例计算 Table1.Proportion calculation of mixed incineration municipal sludge in the mixed samples
混合试样QL/(kJ·kg?1)
污泥提供热值/(kJ·kg?1)
污泥所占比例X
3 340.0
519.5
0.649
4 180.0
426.7
0.533
5 000.0
336.2
0.420
6 000.0
225.7
0.282
6 595.2
160.0
0.200
7 138.5
100.0
0.125
混合试样QL/(kJ·kg?1)
污泥提供热值/(kJ·kg?1)
污泥所占比例X
3 340.0
519.5
0.649
4 180.0
426.7
0.533
5 000.0
336.2
0.420
6 000.0
225.7
0.282
6 595.2
160.0
0.200
7 138.5
100.0
0.125
下载: 导出CSV 表2城市污泥掺烧前后废气排口污染物监测数据 Table2.Pollutant monitoring data of waste gas outlet before and after mixed incineration of municipal sludge mg·m?3
工况及标准
颗粒物
氮氧化物
二氧化硫
氯化氢(以HCl计)
掺烧前
1.33~6.00
58.30~100.30
3.30~5.00
4.69~9.14
掺烧后
7.64×10?2~11.30
54.00~118.00
3.00~7.00
4.73~14.40
GB 18485-2014
≤30
≤300
≤100
≤60
工况及标准
汞及其化合物(以Hg计)
一氧化碳
镉、铊及其化合物 (以Cd+Tl计)
锑、砷、铅、铬、钴、铜、 锰、镍及其化合物
掺烧前
<0.003
2.10~6.30
2.71×10?5~2.58×10?3
4.74×10?2~1.10×10?2
掺烧后
1.0×10?3~1.1×10?2
3.00~11.00
8.20×10?5~6.60×10?3
8.10×10?3~11.10×10?2
GB 18485-2014
≤0.05
≤100
≤0.1
≤1.0
工况及标准
颗粒物
氮氧化物
二氧化硫
氯化氢(以HCl计)
掺烧前
1.33~6.00
58.30~100.30
3.30~5.00
4.69~9.14
掺烧后
7.64×10?2~11.30
54.00~118.00
3.00~7.00
4.73~14.40
GB 18485-2014
≤30
≤300
≤100
≤60
工况及标准
汞及其化合物(以Hg计)
一氧化碳
镉、铊及其化合物 (以Cd+Tl计)
锑、砷、铅、铬、钴、铜、 锰、镍及其化合物
掺烧前
<0.003
2.10~6.30
2.71×10?5~2.58×10?3
4.74×10?2~1.10×10?2
掺烧后
1.0×10?3~1.1×10?2
3.00~11.00
8.20×10?5~6.60×10?3
8.10×10?3~11.10×10?2
GB 18485-2014
≤0.05
≤100
≤0.1
≤1.0
下载: 导出CSV 表3掺烧城市污泥前后垃圾焚烧炉二恶英废气监测结果 Table3.Monitoring results of dioxin waste gas from municipal solid waste incinerator before and after mixed incineration of municipal sludge ng·m?3
URCIUOLO M, SOLIMENE R, CHIRONE R. Fluidized bed combustion and fragmentation of wet sewage sludge[J]. Experimental Thermal and Fluid Science, 2012, 43: 97-104. doi: 10.1016/j.expthermflusci.2012.03.019
1.Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China 2.Beijing Environmental Impact Assessment Center, Beijing 100161, China Received Date: 2020-01-02 Accepted Date: 2020-05-10 Available Online: 2020-11-11 Keywords:municipal sludge/ municipal solid waste/ incineration/ directly mixed incineration Abstract:In order to study the effective disposal method of municipal sludge, and avoid the secondary pollution of organic matter, nitrogen, phosphorus, heavy metal, bacteria and pathogenic bacteria in the sludge to the environment, the disposal technology of mixed incineration of municipal sludge and rubbish in municipal solid waste incineration plant was explored. The results show that the direct combustion of 12.5% municipal sludge had no significant impact on the amount of municipal solid waste into the incinerator, the stability of the incinerator and the emission of pollutants. According to the flue gas monitoring results of mixed incineration of municipal sludge, although the discharged pollutant concentrations slightly increased after directly mixed incineration of municipal sludge, they all could meet the emission requirements. The amount of produced solid waste before and after mixed incineration showed slightly change, and did not result in effect on the surrounding environment. It is technically feasible for directly mixed incineration of a certain proportion of municipal sludge (moisture content 80.0%) in a municipal solid waste incineration plant, which can provide new ideas for municipal sludge disposal.