4results about How to "Harmless" patented technology

The utility model discloses an improved natural gas buffer tank, including buffer tank main part, filter component, filter component includes filter pipeline, and the inner surface sliding sleeve of filter pipeline has a plurality of outer casing, and the side of a plurality of outer casing all is equipped with the apron, and the inner chamber of outer casing and apron is provided with filter medium, and the inner surface of apron is provided with a plurality of gas outlets, and the inner surface of the side of outer casing away from apron is provided with a plurality of air inlets, and the junction of outer casing and apron is provided with sealing compression ring, and both ends of filter pipeline all are equipped with sealing gland, and the middle portion of a sealing gland is fixedly installed with the bottom end of discharge pipe, and the middle portion of another sealing gland is fixedly installed with the gas outlet pipe, and through setting filter component. When exhaust pressure stabilization, the gas in buffer tank main part enters filter pipeline through discharge pipe, and along the staggered air inlet, gas outlet of outer casing, apron presents 'W' type flow, and is purified through internal filter medium, realizes the harmlessness of discharge gas, reduces environmental influence.

This invention relates to the field of solid waste treatment technology, and in particular to a method for multi-stage countercurrent water washing and dechlorination of waste incineration fly ash with a low liquid-to-solid ratio. This invention combines low liquid-to-solid ratio water washing with countercurrent water washing, and utilizes a rotary vibrator to achieve effective dechlorination of waste incineration fly ash, ultimately obtaining water-washed fly ash with a chlorine content of less than 1%. Compared with existing technologies, this invention organically combines low liquid-to-solid ratio water washing, countercurrent water washing, and a rotary vibrator, balancing dechlorination efficiency and water resource utilization. The process is stable and reliable, simple to operate, and has low energy consumption. The treated fly ash meets the requirements for subsequent resource utilization, providing an efficient and feasible new solution for the harmless treatment and resource recovery of waste incineration fly ash.

The application relates to a method for preparing regenerated fluorite from waste aluminum electrolyte by roasting-water washing-alkali leaching, and belongs to the technical field of metallurgical engineering. Waste electrolyte is mixed with calcium oxide and then roasted, so that fluorine is converted into water-insoluble calcium fluoride, lithium is converted into lithium oxide, and aluminum is converted into calcium aluminate. The roasted clinker is subjected to water washing to preferentially extract lithium and remove soluble impurities, so that a lithium-rich solution and a water washing residue are obtained. The water washing residue is subjected to alkali leaching to remove aluminum hydroxide, high-purity calcium fluoride solid is obtained, and the regenerated fluorite product is obtained after drying, the grade of which is greater than 80%. The sodium fluoroaluminate solution generated by alkali leaching can be recycled, and after saturation, aluminum hydroxide is recovered and further used for preparing aluminum oxide; the water washing liquid can be concentrated to recover lithium salt. The application realizes harmless and resource utilization of the waste electrolyte, has simple process, low cost, high comprehensive recovery rate of fluorine, lithium and aluminum, and good economic and environmental protection benefits.

This invention discloses a coal underground direct pyrolysis product separation system coupled with oxy-fuel combustion, comprising an air separation unit, pyrolysis product separation equipment, carbon capture equipment, an oxy-fuel combustion boiler, and heaters inside the boiler. The air separation unit provides nitrogen and oxygen for both underground direct pyrolysis and oxy-fuel combustion. The oxy-fuel combustion boiler heats the nitrogen, providing a heat source for the underground coal seam pyrolysis, and also heats the pyrolysis products, thereby removing solid particles through gas-solid separation rather than liquid-solid separation, reducing the difficulty of product separation. The separated pyrolysis gas can be used to reduce nitrogen oxides generated during oxy-fuel combustion. This invention utilizes the heat generated by oxy-fuel combustion to efficiently separate tar from the coal underground direct pyrolysis products, and by coupling the separation of underground direct pyrolysis products with oxy-fuel combustion, improves the system's economic efficiency and reduces nitrogen oxide emissions during oxy-fuel combustion.