3results about How to "Eliminate environmental risks" patented technology

The application discloses a combined pretreatment method and application of red mud. The method comprises the following steps: high-temperature calcining the red mud, sieving the red mud after cooling, and obtaining calcined red mud; mixing the calcined red mud with water, and heating and stirring; continuously feeding CO2 gas in an intermittent ventilation mode while maintaining heating and stirring; after the ventilation is completed, performing vacuum filtration separation on the obtained slurry, and obtaining red mud filtrate and red mud residue; and performing freeze-drying on the red mud filtrate, and obtaining red mud-based alkali activator powder. The whole treatment process does not introduce other chemical reagents, and utilizes the alkali of the red mud and the industrial by-product CO2, so that waste is treated by waste, and the environmental benefits are remarkable.

The utility model relates to the technical field of waste gas treatment, concretely to high -efficient automatic acid -removing water washing system. System includes primary water washing tower, secondary water washing tower, spray pump and pipeline etc., and the top of primary water washing tower is connected with secondary water washing tower through the pipeline, and the primary water washing tower is connected with acid -containing tail gas inlet pipeline, and the bottom of primary water washing tower is connected with primary water washing tower spray pump through the pipeline, and primary water washing tower spray pump is connected with the top of primary water washing tower through the pipeline. The primary water washing tower is equipped with primary water washing tower liquid level detector and primary water washing tower concentration analysis instrument, and the primary water washing tower liquid level detector is connected with PLC control system, and the secondary water washing tower is equipped with secondary water washing tower liquid level detector and secondary water washing tower concentration analysis instrument, and the liquid level detector is connected with PLC control system. The system linkage through PLC control system and each liquid level detector, concentration analysis instrument, cut -off valve and pump body has realized the automatic control of hydrogen fluoride acid -containing tail gas treatment whole process.

The application discloses a fly ash recycling flue gas deacidification system and method, and belongs to the field of flue gas deacidification technology. The fly ash recycling flue gas deacidification system comprises fly ash pretreatment units, a collaborative grinding and activation unit and a fly ash grading back spraying unit which are sequentially connected. The collaborative grinding and activation unit comprises a raw material mixing device for mixing fly ash, calcium-based materials and heavy metal stabilizers to form a mixture, and a grinding device for grinding and activating the mixture. The fly ash grading back spraying unit comprises an activated ash bin, a metering device and a pneumatic conveying and spraying device which are sequentially connected. The fly ash recycling flue gas deacidification system of the application realizes the recycling of fly ash through the connection of the fly ash pretreatment unit, the collaborative grinding and activation unit and the fly ash grading back spraying unit.