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System and method for preparation of sulphoaluminate cement through collaboration of organic wastewater and industrial solid waste

A technology of sulphoaluminate cement and organic wastewater, applied in cement production, clinker production, etc., can solve problems such as personal health threats and environmental pollution, and achieve the effects of energy utilization, production cost reduction, and cost reduction

Active Publication Date: 2017-06-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct discharge of organic wastewater will cause serious pollution to the environment and pose a serious threat to human health. Therefore, organic wastewater must be effectively treated before it can be discharged.

Method used

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  • System and method for preparation of sulphoaluminate cement through collaboration of organic wastewater and industrial solid waste
  • System and method for preparation of sulphoaluminate cement through collaboration of organic wastewater and industrial solid waste
  • System and method for preparation of sulphoaluminate cement through collaboration of organic wastewater and industrial solid waste

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Experimental program
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Effect test

Embodiment 1

[0089] According to the above-mentioned system and the above-mentioned process, the specific parameters, calculation results and detection are as follows: based on the mass of the solid-liquid mixture after mixing and matching, dealkalized red mud accounts for 35.45%, calcium carbide slag accounts for 24.61%, and aluminum ash accounts for 18.32% %, desulfurized gypsum accounted for 21.62%, based on the mass of calcined raw meal: SiO 2 8.14%, Al 2 o 3 Accounting for 31.20%, Fe 2 o 3 3.72%, CaO 43.23%, MgO 0.33%, TiO 2 1.30%, SO 3 Accounted for 8.94%. Coal powder accounted for 2.53%. Concentrated organic waste water is added to the raw meal and sent to the rotary kiln for calcination at a temperature of 1280°C. Calcination time was 60 minutes. At this time, dioxins, furans, PCBs, etc. can be eliminated very well. Then the flue gas passes through the waste heat recovery equipment to recover the heat. Finally, dust removal and flue gas treatment are carried out on the fl...

Embodiment 2

[0091] According to the above-mentioned system and the above-mentioned process, the specific parameters, calculation results and detection are as follows: based on the mass of the solid-liquid mixture after mixing and matching, dealkalized red mud accounts for 46.86%, calcium carbide slag accounts for 25.34%, and aluminum ash accounts for 10.45%. %, desulfurized gypsum accounted for 17.35%. Concentrated organic waste water is added to the raw meal and sent to a rotary kiln for calcination. The calcination temperature is 1290°C and the calcination time is 60 minutes. No harmful substances such as dioxins, furans, and PCBs were found in the treated flue gas. According to the cement mortar strength test method, the 3-day and 28-day compressive strengths are 40.8MPa and 43.7MPa respectively.

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Abstract

The invention discloses a system and a method for preparation of sulphoaluminate cement through collaboration of organic wastewater and industrial solid waste. The system consists of an organic wastewater pool, a homogenizing pool, a wet powder mill, a pressure filter, a rotary kiln and an indirect heat exchanger. The method includes: mixing dealkalized red mud, carbide slag, aluminum ash, desulfurized gypsum and a part of organic wastewater to obtain a mixed solution, which has a water content of 60%-70% (mass), then conducting wet pulverizing on the mixed solution, and subjecting the wet pulverized material to homogenizing treatment so as to obtain a slurry, and performing mechanical pressure filtration dehydration to obtain a slurry, concentrating another part of organic wastewater, then sending the concentrated organic wastewater and the slurry into the rotary kiln and performing high-temperature calcination to obtain a sulphoaluminate clinker, and spraying pulverized coal into the rotary kiln during high-temperature calcination to combust organic waste in the pulverized coal and slurry and organic waste in the concentrated wastewater. The system and method realize comprehensive utilization of industrial solid waste and organic wastewater and zero-pollution emission.

Description

technical field [0001] The invention relates to a system and a method for preparing sulphoaluminate cement with organic waste water and industrial solid waste. Background technique [0002] With the rapid development of my country's economy, a large amount of energy consumption has produced a large amount of industrial solid waste (referred to as industrial solid waste), which mainly includes red mud, desulfurized gypsum, smelting slag, tailing sand and coal gangue. During the "Eleventh Five-Year Plan" period, the total production of industrial solid waste was 11.8 billion tons, and the total new inventory was 19 billion tons. During the "Twelfth Five-Year Plan" period, the total production of industrial solid waste was 15 billion tons, and the total new inventory was 27 billion tons. With the continuous acceleration of my country's industrialization process, these industrial solid wastes occupy a large amount of land and there is a danger of polluting the environment at an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/32C04B7/24C04B7/38C04B7/43
CPCC04B7/24C04B7/323C04B7/38C04B7/434Y02P40/10Y02P40/121
Inventor 王文龙王超前宋占龙赵希强毛岩鹏孙静
Owner SHANDONG UNIV
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