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Novel method for preparing ceramsite through synergistic co-treatment of coal gangue and sludge
The invention discloses a novel method for preparing ceramsite by synergistic co-treatment of coal gangue and sludge, which belongs to the field of solid waste treatment and resource utilization, aiming at the current situations that the quantity of coal gangue and sludge is huge, the resource utilization rate is low and the like. The whole process mainly comprises the steps of mixing and molding the coal gangue and the dewatered sludge, drying, co-pyrolyzing, co-sintering and the like. Volatile components in the raw materials are effectively released through co-pyrolysis, co-product pyrolytic oil and combustible gas are obtained, and meanwhile disordered distribution of ceramsite pore channels caused by escape of a large amount of high-temperature gas in the next sintering step is reduced. In addition, elements such as N and S in the raw materials are removed in the co-pyrolysis process, and generation of pollutants such as NOx in flue gas during aerobic sintering is avoided. And finally, in the aerobic sintering step, residual organic matters and fixed carbon in the raw materials can be combusted to provide heat for the co-pyrolysis and drying process in the previous step. The method is beneficial to protecting the ecological environment of a coal production area, and meanwhile, an economical and reliable new way is provided for producing the light ceramsite.
针对煤矸石和污泥数量巨大、资源化利用率低等现状，本发明公开了属于固废处置和资源化利用领域的一种煤矸石与污泥协同共处置制备陶粒的新方法。全过程主要包括煤矸石和脱水污泥混合成型、干燥、共热解及共烧结等步骤。共热解有效释放出原料中的挥发分，得到联产物热解油和可燃气，同时降低下一步烧结步骤中高温气体大量逸出导致的陶粒孔道无序分布。此外，原料中的N、S等元素在共热解过程中脱除，避免了有氧烧结时烟气中NOx等污染物的生成。最后，在有氧烧结步骤中，原料中残存的有机物和固定碳可燃烧为上一步共热解和干燥过程提供热量。本发明有助于保护产煤区生态环境，同时为生产轻质陶粒提供一个经济可靠的新途径。
Novel method for preparing ceramsite through synergistic co-treatment of coal gangue and sludge
The invention discloses a novel method for preparing ceramsite by synergistic co-treatment of coal gangue and sludge, which belongs to the field of solid waste treatment and resource utilization, aiming at the current situations that the quantity of coal gangue and sludge is huge, the resource utilization rate is low and the like. The whole process mainly comprises the steps of mixing and molding the coal gangue and the dewatered sludge, drying, co-pyrolyzing, co-sintering and the like. Volatile components in the raw materials are effectively released through co-pyrolysis, co-product pyrolytic oil and combustible gas are obtained, and meanwhile disordered distribution of ceramsite pore channels caused by escape of a large amount of high-temperature gas in the next sintering step is reduced. In addition, elements such as N and S in the raw materials are removed in the co-pyrolysis process, and generation of pollutants such as NOx in flue gas during aerobic sintering is avoided. And finally, in the aerobic sintering step, residual organic matters and fixed carbon in the raw materials can be combusted to provide heat for the co-pyrolysis and drying process in the previous step. The method is beneficial to protecting the ecological environment of a coal production area, and meanwhile, an economical and reliable new way is provided for producing the light ceramsite.
针对煤矸石和污泥数量巨大、资源化利用率低等现状，本发明公开了属于固废处置和资源化利用领域的一种煤矸石与污泥协同共处置制备陶粒的新方法。全过程主要包括煤矸石和脱水污泥混合成型、干燥、共热解及共烧结等步骤。共热解有效释放出原料中的挥发分，得到联产物热解油和可燃气，同时降低下一步烧结步骤中高温气体大量逸出导致的陶粒孔道无序分布。此外，原料中的N、S等元素在共热解过程中脱除，避免了有氧烧结时烟气中NOx等污染物的生成。最后，在有氧烧结步骤中，原料中残存的有机物和固定碳可燃烧为上一步共热解和干燥过程提供热量。本发明有助于保护产煤区生态环境，同时为生产轻质陶粒提供一个经济可靠的新途径。
Novel method for preparing ceramsite through synergistic co-treatment of coal gangue and sludge
一种煤矸石与污泥协同共处置制备陶粒的新方法
WU YULONG (author) / YANG MINGDE (author) / FAN GUIFANG (author) / HU HUSHENG (author) / PU WEIHUA (author) / WANG SHANSHAN (author)
2023-08-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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