System and method for utilizing municipal waste and industrial solid waste construction 3D printing materials
A 3D printing and industrial solid waste technology, applied in the direction of solid waste management, sustainable waste treatment, additive processing, etc., can solve the problems of high investment in sludge dewatering equipment, high operation and maintenance costs, and environmental pollution caused by odorous gas, achieving Effect of eliminating dehydration process, reducing dehydration cost and energy consumption, and reducing production cost
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Embodiment 1
[0115] Preparation using the above system and process, the specific parameters, calculation results and testing are as follows: based on the quality of the solid-liquid mixture after mixing and matching, the dry weight ratio of wet sludge, mineralized garbage, red mud, desulfurized gypsum and calcium carbide slag It is 8:12:25:15:40. The mechanically dehydrated raw meal is directly transported into the rotary kiln for calcination. The calcination temperature is 1310°C and the calcination time is 60 minutes. At this time, toxic and harmful substances such as dioxins can be eliminated. Then the flue gas passes through the waste heat recovery equipment to recover the heat. Finally, the flue gas was subjected to dust removal and flue gas treatment, and no harmful substances such as dioxins were found in the flue gas after treatment. The obtained product was tested by the cement mortar strength test method (GB / T 17671-1999), and the compressive strength for 2 hours was 15.4MPa, and...
Embodiment 2
[0117] Preparation using the above system and process, the specific parameters, calculation results and testing are as follows: based on the quality of the solid-liquid mixture after mixing and matching, the dry weight ratio of wet sludge, mineralized garbage, red mud, desulfurized gypsum and calcium carbide slag It is 8:15:20:12:45. The mechanically dehydrated raw meal is directly transported into the rotary kiln for calcination, the calcination temperature is 1280 ℃, and the calcination time is 60 minutes. No harmful substances such as dioxins were found in the flue gas after treatment. According to the cement mortar strength test method, the 2h compressive strength is 14.2MPa, and the 3-day and 28-day compressive strength are 41.5MPa and 54.5MPa, respectively. The initial setting time is 24min, and the final setting time is 35min. It meets the requirements of building 3D printing materials.
Embodiment 3
[0119] Preparation using the above system and process, the specific parameters, calculation results and testing are as follows: based on the quality of the solid-liquid mixture after mixing and matching, the dry weight ratio of wet sludge, mineralized garbage, red mud, desulfurized gypsum and calcium carbide slag It is 8:10:18:10:54. The mechanically dehydrated raw meal is directly transported into the rotary kiln for calcination, the sintering temperature is 1300°C, and the calcination time is 45 minutes. No harmful substances such as dioxins were found in the flue gas after treatment. According to the cement mortar strength test method, the 2h compressive strength is 13.4MPa, and the 3-day and 28-day compressive strength are 39.6MPa and 51.8MPa, respectively. The initial setting time is 30 minutes, and the final setting time is 42 minutes. It meets the requirements of building 3D printing materials.
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