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Method for synergistically producing calcium-carbon-based biochar ceramsite from sewage sludge and carbide slag
The invention discloses a method for synergistically producing calcium-carbon-based biochar ceramsite from sewage sludge and carbide slag. The method comprises the following steps: stirring and mixing the sewage sludge, the carbide slag and fly ash; carrying out pressure molding on the mixed material to obtain wet-based columnar particles; feeding the wet-based columnar particles to a low-temperature aerobic pyrolysis rotary reactor; at the front end, tail gas waste heat is used for preheating wet-based columnar particles to reduce the moisture content of the particles; biomass contained in the sludge is subjected to aerobic pyrolysis in the low-temperature aerobic pyrolysis area to form biochar, and meanwhile, carbide slag reacts with the environment atmosphere or CO2 generated by pyrolysis to directly provide the mechanical strength of particles; carrying out instantaneous combustion at the tail end of the reactor to remove a surface liquid-phase product; and finally, the maintenance-free calcium-carbon-based biochar ceramsite with relatively high mechanical strength is formed. According to the invention, on the basis of retaining the excellent adsorption and phosphorus removal efficiency of the original biochar ceramsite and the carbon-containing organic matter adsorption performance of the biochar, the carbide slag is adopted to replace raw materials such as quick lime, cement and the like in the original biochar ceramsite, so that the cost is greatly reduced, and maintenance is avoided.
本发明公开了一种污水污泥与电石渣协同生产钙炭基生物炭陶粒的方法，包括：将污水污泥、电石渣和粉煤灰搅拌混合；将混合物料压力成型得到湿基柱状颗粒；将湿基柱状颗粒送至低温有氧热解回转反应器；在前端利用尾气余热对湿基柱状颗粒预热降低颗粒的含水率；在低温有氧热解区将污泥所含的生物质有氧热解形成生物炭，同时电石渣与环境气氛或热解产生的CO2反应直接提供颗粒机械强度；在反应器末端瞬时燃烧去除表面液相产物；最终形成免养护且具有较高机械强度的钙炭基生物炭陶粒。本发明在保留原有生物炭陶粒优异吸附除磷效能及生物炭吸附含碳有机物性能的基础上，采用电石渣代替原生物炭陶粒中的生石灰、水泥等原料，极大地降低成本，还免养护。
Method for synergistically producing calcium-carbon-based biochar ceramsite from sewage sludge and carbide slag
The invention discloses a method for synergistically producing calcium-carbon-based biochar ceramsite from sewage sludge and carbide slag. The method comprises the following steps: stirring and mixing the sewage sludge, the carbide slag and fly ash; carrying out pressure molding on the mixed material to obtain wet-based columnar particles; feeding the wet-based columnar particles to a low-temperature aerobic pyrolysis rotary reactor; at the front end, tail gas waste heat is used for preheating wet-based columnar particles to reduce the moisture content of the particles; biomass contained in the sludge is subjected to aerobic pyrolysis in the low-temperature aerobic pyrolysis area to form biochar, and meanwhile, carbide slag reacts with the environment atmosphere or CO2 generated by pyrolysis to directly provide the mechanical strength of particles; carrying out instantaneous combustion at the tail end of the reactor to remove a surface liquid-phase product; and finally, the maintenance-free calcium-carbon-based biochar ceramsite with relatively high mechanical strength is formed. According to the invention, on the basis of retaining the excellent adsorption and phosphorus removal efficiency of the original biochar ceramsite and the carbon-containing organic matter adsorption performance of the biochar, the carbide slag is adopted to replace raw materials such as quick lime, cement and the like in the original biochar ceramsite, so that the cost is greatly reduced, and maintenance is avoided.
本发明公开了一种污水污泥与电石渣协同生产钙炭基生物炭陶粒的方法，包括：将污水污泥、电石渣和粉煤灰搅拌混合；将混合物料压力成型得到湿基柱状颗粒；将湿基柱状颗粒送至低温有氧热解回转反应器；在前端利用尾气余热对湿基柱状颗粒预热降低颗粒的含水率；在低温有氧热解区将污泥所含的生物质有氧热解形成生物炭，同时电石渣与环境气氛或热解产生的CO2反应直接提供颗粒机械强度；在反应器末端瞬时燃烧去除表面液相产物；最终形成免养护且具有较高机械强度的钙炭基生物炭陶粒。本发明在保留原有生物炭陶粒优异吸附除磷效能及生物炭吸附含碳有机物性能的基础上，采用电石渣代替原生物炭陶粒中的生石灰、水泥等原料，极大地降低成本，还免养护。
Method for synergistically producing calcium-carbon-based biochar ceramsite from sewage sludge and carbide slag
一种污水污泥与电石渣协同生产钙炭基生物炭陶粒的方法
WU JUN (author) / PENG HAO (author) / LI YIFEI (author) / DAI HONGGANG (author) / JI XINYAO (author) / WANG ZHIRUI (author) / REN YUNLONG (author) / GAO LINYAN (author) / SU ZILONG (author) / SHOU WENQI (author)
2024-10-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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