Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing high-strength lightweight aggregate from municipal sludge
The invention provides a method for preparing high-strength lightweight aggregate by using municipal sludge. The method comprises the following steps: firstly, mixing and stirring the sludge to generate slurry; conducting pyrohydrolysis to enable the properties of the slurry to be fundamentally changed in a high-temperature hydrolysis reaction and the dehydration performance of the slurry to be greatly improved; dehydrating the slurry through a high-pressure plate-and-frame filter press; subjecting a ceramsite blank to granulation and balling through a ceramic preparation process, carrying out high-temperature roasting and conducting ceramsite screening so as to obtain the high-strength lightweight aggregate; and conducting resource treatment and recycling on the whole ceramic preparation process through tail water treatment, flue gas purification and deodorization processes and the assistance of a waste heat boiler, thereby achieving low-energy and environment-friendly process effects. According to the method for preparing the high-strength lightweight aggregate, defects in the prior art are overcome, and the method is high in sludge mixing amount, low in admixture requirement, compact in ceramsite structure, high in ceramsite strength, wide in application range, high in economic benefit, friendly to environmentally and low in energy consumption.
本发明提供的一种利用市政污泥制备高强度轻骨料的方法，首先通过对污泥进行混合搅拌生成泥浆；通过热水解使泥浆在高温水解反应中性质发生根本变化，脱水性能大大提高；通过高压板框压滤机对泥浆进行脱水；通过制陶工艺对陶粒胚料进行造粒成球、高温焙烧和陶粒筛分获取高强度轻骨料；通过尾水处理、烟气净化和除臭的工艺以及余热锅炉的辅助，对污泥制陶工艺全程进行资源处理回收利用，达到低能环保的工艺效果。本发明解决了现有技术的不足，提供了一种污泥掺量高、外掺料要求低而陶粒结构紧密、强度高、使用面广、经济效益高且过程环保、能耗小的制备高强度轻骨料的方法。
Method for preparing high-strength lightweight aggregate from municipal sludge
The invention provides a method for preparing high-strength lightweight aggregate by using municipal sludge. The method comprises the following steps: firstly, mixing and stirring the sludge to generate slurry; conducting pyrohydrolysis to enable the properties of the slurry to be fundamentally changed in a high-temperature hydrolysis reaction and the dehydration performance of the slurry to be greatly improved; dehydrating the slurry through a high-pressure plate-and-frame filter press; subjecting a ceramsite blank to granulation and balling through a ceramic preparation process, carrying out high-temperature roasting and conducting ceramsite screening so as to obtain the high-strength lightweight aggregate; and conducting resource treatment and recycling on the whole ceramic preparation process through tail water treatment, flue gas purification and deodorization processes and the assistance of a waste heat boiler, thereby achieving low-energy and environment-friendly process effects. According to the method for preparing the high-strength lightweight aggregate, defects in the prior art are overcome, and the method is high in sludge mixing amount, low in admixture requirement, compact in ceramsite structure, high in ceramsite strength, wide in application range, high in economic benefit, friendly to environmentally and low in energy consumption.
本发明提供的一种利用市政污泥制备高强度轻骨料的方法，首先通过对污泥进行混合搅拌生成泥浆；通过热水解使泥浆在高温水解反应中性质发生根本变化，脱水性能大大提高；通过高压板框压滤机对泥浆进行脱水；通过制陶工艺对陶粒胚料进行造粒成球、高温焙烧和陶粒筛分获取高强度轻骨料；通过尾水处理、烟气净化和除臭的工艺以及余热锅炉的辅助，对污泥制陶工艺全程进行资源处理回收利用，达到低能环保的工艺效果。本发明解决了现有技术的不足，提供了一种污泥掺量高、外掺料要求低而陶粒结构紧密、强度高、使用面广、经济效益高且过程环保、能耗小的制备高强度轻骨料的方法。
Method for preparing high-strength lightweight aggregate from municipal sludge
一种利用市政污泥制备高强度轻骨料的方法
LIU LIHUI (Autor:in) / HUANG FEI (Autor:in) / CHEN RENJING (Autor:in) / ZHANG GUOLIANG (Autor:in) / ZHANG FENGYI (Autor:in)
15.06.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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