8results about How to "Harmless" patented technology

The invention relates to a method for composting by adopting hermetia illucens fecula. The method comprises the following steps: collecting hermetia illucens fecula and biological wastes; the method comprises the following steps of: mixing the raw materials, so that the carbon-nitrogen ratio in a mixture is (20-30): 1, spraying a microbial complex microbial inoculant, adding glucose, monopotassium phosphate, polysorbate, ferrous sulfate, manganese sulfate and copper sulfate, fully mixing, piling, covering with a heat-insulating film, and sealing to obtain a primary compost; collecting hollow bricks, laying a first hollow brick layer on the plane, enabling pores of the first hollow brick layer to be parallel to the horizontal plane, turning the primary compost to the first hollow bricks to form a first compost layer, flattening, laying a second hollow brick layer, sequentially carrying out the steps for a plurality of times until composting is completed, and covering the periphery of a compost body with a heat-insulating film to form the compost. And keeping for 10-30 days. The method can increase the abundance and strength of microbial metabolic pathways, increase the composting temperature, prolong the high-temperature time of the compost, accelerate the decomposition of the compost, and realize the harmlessness of the black soldier fly feces.

The invention relates to a sludge treatment process and device based on flash evaporation, and the device comprises a first-stage flash evaporation system, and also comprises any one of a hydrolysis tank and a second-stage flash evaporation system. According to the method, the sludge is subjected to resourceful treatment in a flash evaporation and pyrohydrolysis and / or secondary flash evaporation mode, cell walls in the sludge can be fully and effectively broken under the low-temperature condition through the flash evaporation technology, moisture and solutes in cells are released, the dewatering performance of the sludge is improved, and the sludge can be recycled. The wall-broken sludge is conveyed to the hydrolysis tank for hydrolysis and / or the second flash evaporation tank for flash evaporation and drying, and the wall-broken sludge is more easily hydrolyzed and / or dried. The problems of high energy consumption, large heat loss and long treatment time in the sludge drying process are solved, and the productivity is greatly improved.

The present application relates to a kind of copper slag magnetofluid vortex enhanced valuable metal phase aggregation and settlement and lead-zinc synergic recovery method and device, comprising the following steps: current is passed into copper slag melt in the molten pool, and magnetic field is applied, the Lorentz force produced by the coupling of current and magnetic field has the component force of copper slag melt formation flow, magnetic fluid vortex flow field is formed in copper slag melt, valuable metal component in copper slag melt settles and forms bottom valuable metal rich phase, lead, zinc component volatilization forms lead-zinc-containing flue gas;Bottom valuable metal rich phase and tailings are collected respectively, and the lead-zinc-containing flue gas produced in the treatment process is staged condensation, and lead enrichment product and zinc enrichment product are obtained.Compared with prior art, the present application can realize the phased regulation of melt flow field under the condition of no mechanical stirring, improve valuable metal separation efficiency and lead-zinc volatilization recovery rate, reduce valuable metal residue in tailings, realize the reduction, harmless and resource utilization of copper slag.

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 invention provides a pre-drying and carbonizing system for waste. The pre-drying and carbonizing system comprises a sludge storage module, a furnace smoke pipeline module, an all-in-one machine module, a separation and pressurization module and a powder pipeline module, the sludge storage module is connected with the all-in-one machine module, and the sludge storage module is used for storing sludge and conveying the sludge to the all-in-one machine module; one end of the boiler smoke pipeline module is connected with the all-in-one machine module, the other end of the boiler smoke pipeline module is connected with a boiler, and the boiler smoke pipeline module is used for conveying high-temperature smoke exhausted by the boiler to the all-in-one machine module; the all-in-one machine module is used for drying and carbonizing the sludge by utilizing the high-temperature flue gas to generate sludge powder; the separation pressurization module is connected with the all-in-one machine module and used for conveying the sludge powder to a boiler combustion opening through the powder pipeline module for combustion. According to the technical scheme provided by the invention, the waste sludge can be treated into comburent, and harmless, stable and resource treatment of the sludge is realized.

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.