9results about How to "Realize full recycling" patented technology

The invention provides a full-chain integrated iron and aluminum slag recovery method which comprises the following steps: S1, mixing iron and aluminum slag with first alkali liquor to carry out first alkaline leaching reaction, and carrying out solid-liquid separation to obtain first metal hydroxide slag and first alkaline leaching liquor; s2, mixing the first metal hydroxide slag with second alkali liquor, carrying out second alkali leaching reaction, and carrying out solid-liquid separation to obtain an aluminate solution and second metal hydroxide slag; s3, pulping the second metal hydroxide slag, adding acid for acid dissolution, adding phosphate, seed crystal and a complexing agent for iron precipitation reaction, performing solid-liquid separation to obtain iron phosphate slag and nickel-cobalt-manganese extraction pre-liquid, and calcining the iron phosphate slag to obtain anhydrous iron phosphate. According to the method, metal elements can be completely recycled, and the recycled product can be applied to an existing industrial chain.

The application discloses an ammonia evaporation ammonia gas shunt treatment process and system based on ammonia gas fractional condensation separation, and belongs to the technical field of coke oven gas purification, and comprises the following steps: S1, ammonia gas shunt and purification: ammonia gas containing sulfur evaporated from the top of an ammonia evaporation tower is subjected to fractional condensation cooling, the temperature of a gas phase at the outlet of an ammonia fractional condenser is controlled, ammonia gas is partially condensed, condensed ammonia water rich in ammonia and incondensable ammonia gas rich in hydrogen sulfide are formed, and preliminary separation of ammonia gas and hydrogen sulfide is realized; S2, incondensable gas treatment: incondensable ammonia gas rich in hydrogen sulfide is separately led out and introduced into the middle part of a precooling tower located before a desulfurization tower, so that the incondensable ammonia gas is countercurrently contacted with circulating ammonia water sprayed in the precooling tower, hydrogen sulfide in the incondensable ammonia gas is absorbed by the circulating ammonia water, and part of ammonia gas is condensed; and S3, ammonia resource utilization: condensed ammonia water rich in ammonia obtained in the fractional condensation cooling step is not subjected to the incondensable gas treatment step and the desulfurization tower, but is at least partially directly sent to a ammonium sulfate saturator to serve as raw material for producing ammonium sulfate.

The invention discloses a polymethoxylated flavone component enriched from citrus chachiensis hortorum as well as an enrichment method and application of the polymethoxylated flavone component, and relates to the technical field of extraction, separation and purification of effective components in natural plants. The polymethoxylated flavone component enriched from citrus chachiensis hortorum disclosed by the invention comprises seven polymethoxylated flavone components, namely 3, 5, 6, 7, 8, 3 ', 4'-heptamethoxylated flavone, nobiletin, hesperetin, 5, 6, 7, 3 ', 4'-pentamethoxylated flavone, 5, 7, 8, 3 ', 4'-pentamethoxylated flavone, 3 ', 4', 5 ', 6, 7, 8-hexamethoxy-5-hydroxylated flavone and 5-hydroxy-4', 6, 7, 8-tetramethoxylated flavone. Meanwhile, various polymethoxylated flavonoids in citrus chachiensis hortorum are contained, so that the blood fat level of high-fat diet mice can be reduced, the accumulation of lipid plaques and the oxidative stress level are reduced, and the effect of preventing and treating atherosclerosis is shown.

This invention belongs to the field of road repair technology, specifically relating to a method for milling drum cutter head distribution based on the gradation design of recycled materials according to full recycling requirements, including the following steps: Step 1: Determine the target gradation X according to design requirements; Step 2: Determine the gradation of recycled materials produced by milling drums with different cutter head densities. Step 3: Based on the target gradation X, divide the milling drum surface into different milling regions and determine the cutter density of each milling region; then determine the recycled material gradation corresponding to each milling region. Step 4: Combine formula (1) to determine the proportion of different milling areas on the milling drum. Step 5: Design the arrangement of different milling zones on the milling drum. This invention calculates the gradation of recycled material under different milling drum cutter head densities, sets milling zones with different cutter head densities on the same milling drum, and mixes the recycled materials produced by different milling zones during the milling process to obtain high-performance recycled material that meets the requirements of full recycling.

This invention belongs to the field of condensate recovery, specifically relating to a condensate recovery system and method for steam transmission pipelines. The system includes a steam main pipe and an inlet pipe. The inlet pipe is fixedly connected to the steam main pipe, and a recovery assembly is installed on the inlet pipe. The recovery assembly includes a drain valve, which is fixedly connected to the inlet pipe. A filter pipe is fixedly installed at the end of the drain valve away from the inlet pipe, and a Y-type filter is fixedly installed at the end of the filter pipe away from the drain valve. An input pipe is fixedly connected to the Y-type filter. This condensate recovery system and method for steam transmission pipelines achieves full condensate recovery through the synergistic action of the recovery components. The recovered condensate can be reused according to production needs, effectively improving resource utilization efficiency, reducing fresh water consumption, and aligning with the concept of green production.

The invention discloses a resource recycling system for fluorine components in fluorobenzene production tail gas, which comprises a synthesis reaction kettle, the top of the synthesis reaction kettle is provided with a copious cooling unit, and the copious cooling unit is connected with a washing unit; wherein the washing unit comprises a multi-stage water washing tower, a first-stage alkaline washing tower and a water washing demisting tower which are connected in series, the alkaline washing period of the first-stage alkaline washing tower is set, or the concentration limit value of sodium fluoride in spraying alkaline liquor in the first-stage alkaline washing tower is set, and the first-stage water washing tower and the first-stage alkaline washing tower in the multi-stage water washing tower are periodically switched and alternately used. The system is simple, clean, environment-friendly, stable, efficient, controllable in component, high in fluorine element recovery rate and long in service life.

This invention provides a converter gas purification and energy recovery system, comprising a moving particle bed, a waste heat boiler, a secondary dust collector, and a gas holder. The moving bed particles are made from compressed converter ash and contain a large amount of iron and iron oxides. The invention also provides a method for using this system, comprising: high-temperature converter gas entering the moving particle bed, filtering most of the dust and purifying the oxygen component in the gas to prevent gas explosions in subsequent operations; the purified gas entering the waste heat boiler to recover waste heat and generate medium- and high-pressure steam; the gas after waste heat recovery undergoes dust removal in the secondary dust collector and then enters the gas holder. When the CO content in the gas is lower than the concentration entering the gas holder, it enters the moving particle bed to reduce the iron oxides in the particles. This method uses a completely dry dust removal process, consumes zero water resources, eliminates gas safety issues, is environmentally friendly, and produces no dust or CO emissions. It can recover the full-temperature sensible heat of the converter gas, release the chemical energy in the gas, and utilize TFe resources in the dust collector ash.

The invention discloses an o-fluorotoluene synthesis tail gas on-line cryogenic purification process, which comprises the following steps: synthesizing synthesis tail gas generated in a reaction kettle in the o-fluorotoluene synthesis process, and indirectly cooling the synthesis tail gas to below-80 DEG C by a cryogenic unit through a low-temperature refrigerant at-100 DEG C; wherein 99 wt% or more of o-fluorotoluene, nitrogen dioxide and 90 wt% or more of hydrogen fluoride components are condensed and intercepted and return to the synthesis reaction kettle along with condensate to continue to participate in the synthesis reaction, and copious cooling tail gas from the copious cooling unit enters the activated carbon adsorption unit to be adsorbed for further dehydrofluorination, then enters the SCR denitration unit to be denitrated and then is discharged. The method is simple in process route, clean, environment-friendly, stable, efficient, low in operation cost and high in defluorination and denitration efficiency.

The invention relates to the technical field of benzyl alcohol industrial production, and provides a method and device for improving reaction selectivity and yield of benzyl alcohol industrial production, and the method comprises the following steps: S1, mixing benzyl chloride and an alkali solution, and injecting the mixture into a hydrolysis reaction kettle for hydrolysis reaction; s2, cooling after the reaction is finished, adding a NaCl solution, uniformly mixing, and separating in an oil-water separator to obtain an oil-phase material and a water-phase material; s3, the oil-phase material enters a rectifying tower to be rectified, and benzyl alcohol is obtained. The oil / water phase separation needs a certain density difference, the density of the water phase is improved by supplementing the NaCl solution into the reaction liquid, so that the oil / water phase entering the settling process can be thoroughly layered, the thorough separation of the oil / water phase is ensured, and the reaction selectivity and the yield of benzyl alcohol are further improved.