10results about How to "Eliminate environmental risks" patented technology

The invention discloses a method for harmlessly preparing ceramsite by removing arsenic and antimony from arsenic-alkali leaching residues. The method comprises the following steps: mixing matrix components containing arsenic alkali leaching residues, quartz sand and alumina powder with a solid carbonaceous regulator, adding water to make pellets, and roasting the pellets to obtain the arsenic alkali leaching residues. According to the method, removal and recovery of arsenic and antimony in the arsenic-alkali leaching residues can be realized by using the same process while ceramsite is prepared, the problem that the arsenic-alkali leaching residues cannot be completely digested due to high toxicity and high alkalinity is solved, and meanwhile, volatile arsenic and antimony can be recovered and returned to an antimony smelting main system by cooling and capturing smoke dust; according to the method, waste of valuable metal and pollution of arsenic are avoided, low-cost and high-value treatment of the arsenic alkali leaching residues is achieved, the prepared ceramic particles are high in strength and small in density and can be applied to the fields of building materials and the like, and the method is short in process, low in cost and capable of achieving industrial application.

The application provides a kind of secondary aluminum ash and desulfurization ash resource system and method of synergistic treatment, the system includes along material flow closed circuit connection's pretreatment and batching system, thermal treatment system, flue gas purification and resource recovery system;Method includes: secondary aluminum ash is washed with water after and desulfurization ash is dosed according to calcium aluminum molar ratio 0.8-1.2, simultaneously generates the first flue gas containing ammonia;Mixed material is calcined to generate calcium aluminate product, simultaneously generates process flue gas rich in sulfur, process flue gas is reacted after dust removal, impurity removal with the first flue gas in liquid phase system and crystallization ammonium sulfate product is prepared, dust removal ash returns dosing.The application is converted into calcium aluminate and ammonium sulfate product by multistage synergy and full closed circuit circulation design, realizes that harmful substance is completely decomposed, pollutant near zero emission and resource depth recovery, and has significant environmental and economic benefits.

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.

Crude gas generated by a gasification furnace of the European smelting furnace is subjected to coarse dust removal through gravity dust removal, the dust removal ash is discharged to a gravity dust storage tank on the lower portion through a dust discharging valve, a material level meter of a tank body is remotely observed, a high material level is achieved, the dust discharging valve is closed, and the dust removal ash is discharged to the gravity dust storage tank through the dust discharging valve. A tank body pressure display device is remotely observed, a tank body blow-off valve is closed, the nitrogen pressure of a nitrogen source is adjusted to 0.8 MPa through a nitrogen pressure adjusting device, an in-tank stamping device 10 is started to stamp the interior of the tank to 0.8 MPa, a lower fluidization ash conveying device is started to adjust nitrogen to 0.6 MPa, the nitrogen pressure is adjusted to 0.1-0.3 MPa through an ash conveying pipe and an ash conveying device, and the nitrogen pressure is adjusted to 0.8 MPa through a nitrogen pressure adjusting device. And dense phase conveying is started, gravity ash is conveyed to a raw coal bunker of the coal injection system, and ash conveying is stopped after the ash is conveyed to the low material level. And ash conveying nitrogen is connected to the environment dust removal bag box body through a pipeline and is discharged by the environment dust removal bag box body.

The invention relates to the technical field of rock wool furnaces, in particular to a low-chromium aluminum-chromium refractory material for a rock wool furnace lining and a preparation method of the low-chromium aluminum-chromium refractory material. The preparation method comprises the following steps: S1, stirring and mixing corundum particles and fused zirconium mullite particles to obtain a premixed particle material; s2, the corundum fine powder, the chromium concentrate fine powder, the andalusite fine powder and the zirconite fine powder are mixed and ground together until the particle size is smaller than or equal to 65 micrometers, and premixed fine powder is obtained; s3, mixing the premixed granular material and the premixed fine powder material to obtain a premixed material; s4, sequentially adding Si powder and aluminum silicate fibers into the premix, and mixing to obtain a mixture; s5, adding a phosphoric acid solution into the mixture, stirring and mixing, adding into a mold for vibration molding, naturally curing, and drying to obtain a green material; and S6, the green body material is subjected to high-temperature heat preservation for a period of time. The refractory material prepared by the invention is environment-friendly, high in sintering density, good in thermal shock resistance, small in thermal expansion coefficient and strong in erosion resistance.

The utility model discloses a system for screening iron slag produced by a rotary kiln, which comprises a screening unit for screening the iron slag, so that the screened iron slag is sent to the next process, and the unscreened iron slag is sent to a steelmaking converter to serve as a cooling agent to be reused; according to the iron slag screening device, iron slag is screened according to the iron-making or steel-making iron-containing material particle size charging standard, so that the iron slag is more effectively and completely recycled, the environmental protection risk of a steel mill is eliminated, and solid waste of the steel mill has certain economic value.

A high-temperature smoke cooling, metering and packaging integrated device comprises a smoke collecting device, a smoke cooling and conveying system, a packaging device, a single barrel weighing device and an ash conveying device; the invention can directly reduce the temperature of high-temperature smoke from 180°C to 60°C, which is lower than the maximum tolerance temperature of bagging and meets the basic packaging conditions; solve the sealing problem between the feeding port and the packaging barrel, eliminate the problem of smoke flying, and eliminate environmental risks; solve the problem that the weight of a single barrel does not reach the export weight; realize single bag metering, which is convenient for material calculation and real-time adjustment; eliminate small truck transit transportation, save production costs, and reduce job risk factors; eliminate smoke kneading machines, reduce equipment, and reduce pollution sources.

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 utility model discloses a fixed-point positioning parking device for receiving leaked engine oil of a forklift, which relates to the field of forklift parking devices and comprises a parking steel plate, a bearing base is arranged at the bottom of the parking steel plate, an installation block is fixedly installed on the outer wall of the bearing base, and a cushion block is arranged at the end of the parking steel plate. A limiting baffle is fixedly installed on the outer wall of the parking steel plate, a limiting groove is formed in the outer wall of the parking steel plate, an infrared sensor is fixedly installed at the end of the parking steel plate, an audible and visual alarm is fixedly installed on the outer wall of the bearing base, and a recycling mechanism is arranged at the bottom of the parking steel plate. According to the fixed-point positioning parking device for receiving leaked engine oil of the forklift, fixed-point positioning parking of the forklift is achieved, efficient prevention and control and convenient management of engine oil pollution are achieved at the same time, environmental pollution and slipping hidden dangers caused by direct dripping of oil liquid on the ground are avoided, the manual cleaning cost is greatly reduced, and meanwhile the working efficiency is improved. And environmental protection risks and safety accident hidden dangers caused by engine oil leakage are completely eradicated from the source.

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.