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| Energy mass balance model of main reaction device for preparing high chlorine consumption products from fly ash |
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Received:November 07, 2022
Revised:November 07, 2022
Accepted:November 08, 2022
Published Online:April 21, 2023
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| DOI： |
| KeyWord:fly ash;carbothermal chlorination;injection furnace;high chlorine consumption products;energy mass balance model |
| Author | Institution |
| liyanjiang |
National Engineering Research Center of green recycling for strategic metal resources，Institute of Process Engineering, Chinese Academy of Sciences |
| duandongping |
National Engineering Research Center of green recycling for strategic metal resources，Institute of Process Engineering, Chinese Academy of Sciences |
| chensiming |
National Engineering Research Center of green recycling for strategic metal resources，Institute of Process Engineering, Chinese Academy of Sciences |
| liuyan |
National Engineering Research Center of green recycling for strategic metal resources，Institute of Process Engineering, Chinese Academy of Sciences |
| zhoue |
National Engineering Research Center of green recycling for strategic metal resources，Institute of Process Engineering, Chinese Academy of Sciences |
| dongchangji |
Qinghai Salt Lake Industry Co., Ltd. |
| mazhen |
Qinghai Salt Lake Industry Co., Ltd. |
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| Abstract: |
| Exploring and developing a new extraction process of valuable components of fly ash with high added value is of practical significance to improve the resource utilization efficiency of bulk solid waste fly ash. Based on the principle of chlorination metallurgy, this paper first proposes a technical solution to prepare high chlorine consumption products with fly ash and industrial by-product chlorine as the main raw materials by using the injection shaft furnace process combined with distillation purification technology, giving consideration to Treating theSwastesSwithSwastes Then the energy and mass balance model of the main reaction device of the injection furnace process is constructed, and the economic and technical indicators are analyzed through numerical calculation, and the feasibility of the process is evaluated. The calculation results show that the theoretical output of AlCl3, FeCl3 and SiCl4 with high added value can be 498.78, 94.86 and 935.55 kg respectively by treating 695 kg fly ash per hour; at the same time, 280.47kg coke, 1593.74kg industrial by-product chlorine and 182.07kg carrier air are consumed; increasing the preheating temperature of industrial by-product chlorine can reduce coke consumption and optimize production costs; the heat taken away by the furnace gas accounts for 74.78% of the heat expenditure of the main reactor, which is positively related to the chlorination rate of the oxides in the fly ash; the high calorific value furnace gas after rectification purification can be recycled together with waste heat recovery equipment such as flue gas furnace. The research contents and results can provide theoretical basis and data support for subsequent process simulation and optimization of operating parameters. |
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