REMOVAL OF SO<sub>2</sub> AND HCl FROM SIMULATED FLUE GAS BY CEMENT CLINKER

LU Ping; LIU Kai; YANG Hong-yi; MENG Hong-ju; LIU Ya-lei

doi:10.13205/j.hjgc.202112019

Volume 39 Issue 12

Mar. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(12): 128-134

LU Ping, LIU Kai, YANG Hong-yi, MENG Hong-ju, LIU Ya-lei. REMOVAL OF SO2 AND HCl FROM SIMULATED FLUE GAS BY CEMENT CLINKER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 128-134. doi: 10.13205/j.hjgc.202112019

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LU Ping, LIU Kai, YANG Hong-yi, MENG Hong-ju, LIU Ya-lei. REMOVAL OF SO₂ AND HCl FROM SIMULATED FLUE GAS BY CEMENT CLINKER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 128-134. doi: 10.13205/j.hjgc.202112019

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REMOVAL OF SO₂ AND HCl FROM SIMULATED FLUE GAS BY CEMENT CLINKER

doi: 10.13205/j.hjgc.202112019

1. School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China;
2. Nanjing Kesen Kenen Environment & Energy Co., Ltd, Nanjing 210019, China

Received Date: 2021-01-02
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

The co-processing of municipal solid waste(MSW) with dry cement kiln has been paid attention all over the world because of its advantages such as high reaction temperature, low renovation cost, good comprehensive treatment performance and no secondary pollution. The removal characteristics of SO₂ and HCl by cement clinker in simulated flue gas was investigated at 700~1000 ℃ in a fixed-bed experimental reactor. The adsorption mechanism of SO₂ and HCl was discussed on the basis of physiochemical properties of original and spent cement clinker samples. The results indicated that the removal efficiency of SO₂ by cement clinker increased rapidly as the reaction temperature increased from 700 ℃ to 1000 ℃, and the maximum unit adsorption capacity of SO₂ reached 4.9 mg/g while only SO₂ was present in simulated flue gas. The opposite was that the removal efficiency of HCl by cement clinker decreased as reaction temperature increased from 700 ℃ to 1000 ℃, and the corresponding unit adsorption capacity of HCl decreased from 8.40 mg/g to 4.8 mg/g while only HCl was present in the simulated flue gas. The initial adsorption rates of SO₂ or HCl were determined by its concentration, and the adsorption rate of HCl was significantly larger than that of SO₂. When SO₂ and HCl were present in simulated flue gas, the removal performance of HCl by cement clinker decreased slightly, but existing HCl could significantly promote the SO₂ removal performance and its adsorption reaction rate, and resulting in the unit adsorption capacity of SO₂ at 700 ℃ and 1000 ℃ increased from 1.8 mg/g and 4.9 mg/g to 4.5 mg/g and 7.8 mg/g, respectively. The main reason of above results was the migration of chloride ions in spent cement clinker. These results provide a reference for the industrial application of a new co-processing technology using dry cement clinker to treat municipal solid waste incineration flue gas.
- cement clinker,
- cement kiln co-processing,
- HCl,
- SO₂,
- removal performance

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References

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