14results about How to "Realize closed-loop recycling" patented technology

The application discloses a method for preparing high-purity tellurium dioxide powder from waste tellurium dioxide target material, comprising the following steps: step one, crushing the waste tellurium dioxide target material to obtain tellurium dioxide pre-crushed material; step two, ball-milling the tellurium dioxide pre-crushed material and drying to obtain tellurium dioxide powder; and step three, purifying the tellurium dioxide powder to obtain high-purity tellurium dioxide powder. 131 The application solves the problems of traditional powderization process, such as serious powder agglomeration, wide particle size distribution, easy introduction of impurities and poor industrial applicability, and the prepared powder can be directly applied to the production of tellurium dioxide target material, and the method can also be applied to the preparation of tellurium dioxide single crystal, infrared acousto-optic devices and electronic component materials, and has excellent industrial application prospect.

The application discloses a numerical control gantry milling machine and belongs to the technical field of machine tools, which comprises a bearing plate, a linear module fixedly installed on the upper surface of the bearing plate, a bearing plate fixedly installed on the upper surface of a moving block of the linear module, gantry frames fixedly installed at both ends of the upper surface of the bearing plate, a liquid collecting and spraying mechanism fixedly installed between the upper halves of the two sets of gantry frames, and a cooling mechanism fixedly installed between the lower halves of the two sets of gantry frames and connected with the liquid outlet end of the liquid collecting and spraying mechanism. The application realizes a high-efficiency cooling liquid closed-loop circulation system through the design of the cooling mechanism and the liquid collecting and spraying mechanism, reduces the material cost and environmental protection pressure, guarantees the stable cooling effect, and realizes the accurate cooling of the cutting area through the ball tube rotation adjustment and the double-path nozzle design.

This invention relates to the field of wood composite materials technology, specifically to a recycled wood composite board and its preparation process. The process includes recycled wood fibers pretreated with mild acid hydrolysis and a coordination adhesive system. The recycled wood fibers are derived from waste urea-formaldehyde resin-bonded engineered wood products. After treatment with an organic acid buffer solution with a pH of 3.5 to 5.0 at 80 to 120°C for 15 to 30 minutes, residual urea-formaldehyde resin fragments on the fiber surface partially depolymerize and generate amino groups in situ. The amino content on the fiber surface is 2.0 to 5.0 μmol / g. This invention activates the residual amino groups in situ through mild acid hydrolysis, transforming the residual resin from a bonding obstacle into a bonding enhancement resource. Excellent bonding performance can be achieved without pursuing a high degumming rate, fundamentally solving the technical problem of the incompatibility between degumming and fiber retention.

This invention discloses a device for the advanced treatment and full resource recovery of molybdenum-iron contaminated water, comprising: a pretreatment and advanced molybdenum removal unit consisting of a homogeneous adsorption-flocculation synergistic sedimentation chamber and a two-stage molybdenum removal separator; a molybdenum desorption and enrichment unit consisting of a molybdenum desorption reaction chamber and a molybdenum enrichment chamber; and an iron conversion and regeneration unit consisting of an iron conversion chamber and an iron salt regenerator. This invention achieves advanced purification of molybdenum-iron contaminated water to drinking water standards, while simultaneously and efficiently recovering molybdenum and iron resources, forming a zero-emission recycling system for iron salts and solid products, significantly reducing treatment costs and creating economic benefits.

The application discloses a method for degrading polyester, and a degraded product and application thereof. The method comprises the following steps: alcoholysis, impurity removal and crystallization treatment of the polyester in the presence of a titanium-containing catalyst to obtain a degraded product. The green and efficient titanium-containing catalyst has high catalytic efficiency, and the depolymerization rate reaches 100%. The polymerization degree of the oligomer in the alcoholysis product is only 1-3. Moreover, the green and efficient titanium-containing catalyst does not contain heavy metals, and is harmless to the environment and human bodies. The catalyst residual amount in the target product is low, and has no influence on the polyester regeneration.

This utility model relates to the technical field of yarn steaming devices, specifically disclosing a high-efficiency and energy-saving yarn steaming and setting device, including a steaming box. The steaming box contains a yarn rack, which includes two sleeves rotatably connected to the inner wall of the steaming box. The inner walls of the two sleeves are provided with steam pipes extending to the outer wall of the steaming box. The outer walls of the steam pipes have several evenly distributed through holes. Turntables are fixedly connected to the opposite outer walls of the two sleeves. Multiple placement plates are movably arranged between the two turntables. Rotating shafts, rotatably connected to the turntables, are fixedly connected to the left and right end faces of each placement plate. A connecting rod is fixedly connected to the other end of each rotating shaft. Limiting rings are fixedly connected to the left and right end faces inside the steaming box. This spatial parallelogram linkage mechanism achieves uniform heating and setting of the yarn roll, while simultaneously realizing closed-loop recycling of water resources, combining excellent setting quality with significant advantages of high efficiency, energy saving, and environmental protection.

This application provides a methyl ethyl carbonate (MEC) production system and method, relating to the field of MEC production technology. The system includes: a reactive distillation column with a feed inlet, a separation inlet, and a first outlet; a first separation unit connected to the separation inlet to separate a first material; a neutralization evaporation unit connected to the first outlet; a second separation unit with a first circulation inlet, a fourth inlet, and a fourth outlet, the first circulation inlet connected to the reactive distillation column, and the neutralization evaporation unit connected to the fourth inlet; and a MEC column with a fifth inlet, a second circulation inlet, a product outlet, and a by-product outlet, the second circulation inlet connected to the fourth inlet, and the fourth outlet connected to the fifth inlet. The embodiments of this application achieve continuous production of MEC, recover and recycle the reaction raw materials, improve the utilization rate of raw materials, and increase the purity of methyl ethyl carbonate.

The invention discloses a quality-divided self-adaptive-multi-section collaborative strengthening photoresist wastewater treatment process. The process comprises the following steps: quality-divided self-adaptive shunting, self-adaptive Fenton oxidation pretreatment, collaborative biochemical degradation treatment and self-adaptive deep strengthening treatment. According to the invention, salt content and COD two-parameter multi-threshold quality-divided self-adaptive shunting, Fenton oxidation parameter dynamic adjustment, up-flow dynamic water distribution hydrolytic acidification, anaerobic intelligent nutrition regulation and EGSB anaerobic cooperation, A / O biochemical and self-adaptive precipitation enhanced advanced treatment, and environment-friendly compliance treatment of sludge, concentrated salt and biogas are carried out through a whole-process PLC cooperative regulation and control system; a set of cooperative treatment system adaptive to variable photoresist wastewater types and large water quality fluctuation is constructed, efficient detoxification and bond breaking of high-salt, high-chlorine and high-COD toxic wastewater are achieved, the biodegradability is remarkably improved, COD is degraded in a stepped mode, effluent stably reaches the standard, and it is ensured that by-products are treated in a compliant mode and the operation cost is low.

This invention relates to the field of powder metallurgy technology and discloses a resin-sealed powder metallurgy stainless steel vacuum pump chamber and its manufacturing process. The pump chamber includes a pump wall, the inner wall of which is equipped with a stabilizing component for constant-pressure injection of new oil and simultaneous discharge of waste oil and wear particles. The inner wall of the pump wall is provided with a wear-resistant layer. This device, through an oil supply chamber, a silicon carbide ceramic infiltration layer, and an orifice plate with tapered holes, drives the circulation of cold lubricating oil by utilizing the pressure difference between the negative pressure chamber and the high-pressure chamber of the pump chamber itself. After two stages of pressure stabilization and flow restriction by the infiltration layer and the orifice plate, the cold lubricating oil uniformly penetrates into the inner wall of the wear-resistant layer in the form of a capillary liquid surface, achieving a constant-pressure and stable oil supply. This avoids interference with the vacuum level of the pump chamber caused by the oil supply action. Without affecting the vacuum generation efficiency, it provides full-coverage lubrication and cooling for the friction pair, reducing wear and heat generation from the source, while protecting the resin-sealed layer of the powder metallurgy matrix.

The invention discloses a selective lithium extraction and green regeneration method for a waste lithium titanate battery. The method comprises the following steps: firstly, pretreating the waste lithium titanate battery to obtain black powder containing lithium titanate; then selectively leaching lithium by adopting a quaternary ammonium salt / gluconic acid / ethylene glycol-based eutectic solvent to obtain a lithium-rich leaching solution and leaching slag containing a titanium compound; the leachate is circularly used for leaching lithium in the black powder until the lithium is saturated, a saturated sodium carbonate solution is added for reaction, washing and drying are performed after solid-liquid separation, and battery-grade lithium carbonate is obtained; the leaching residues are subjected to impurity removal, washing and drying, and a titanium compound is obtained; and finally, preparing the lithium titanate negative electrode material by taking the lithium titanate and battery-grade lithium carbonate as a precursor. According to the method, a traditional strong acid leaching process is replaced with the environment-friendly green solvent, the method has the remarkable advantages that the process is simple, the solvent can be recycled, and secondary pollution is avoided, efficient selective extraction of lithium in the waste lithium titanate battery and green short-process regeneration of the lithium titanate negative electrode material are achieved, and the method has excellent industrial application prospects.

The application discloses a steel pipe thread processing equipment and belongs to the technical field of steel pipe thread processing, which comprises an automatic machine tool, a tapping drill bit is sleeved in the tapping tool shank of the automatic machine tool, a base is connected below the automatic machine tool corresponding to the tapping drill bit, a sliding groove is formed in the side end face of the base, and an automatic feeding assembly is slidably connected in the sliding groove. In the application, pretreatment and chip removal control are performed, the piston disc is synchronously triggered to enter the steel pipe when the tapping drill bit goes down, the first plugging assembly is turned over to compress the switching spring to form a negative pressure environment, air is discharged through the exhaust hole to inhibit the accumulation of iron chips, the risk of thermal deformation is reduced, tapping and reverse polishing are performed, the tapping drill bit is reversely rotated to go up after tapping is completed, the polishing roller is reversely rotated by utilizing inertia driving, thread burrs are removed and the surface roughness is optimized by micro-cutting, chip removal and environmental protection recovery are performed, the exhaust hole is closed and the second plugging assembly is opened when the piston disc is reset, directional airflow is formed to suck the metal chips into the steel pipe, and dust closed-loop recovery is realized.

This utility model provides an intelligent water-saving control device for soilless potato cultivation, relating to the field of soilless potato cultivation technology. It includes a housing, a top-liftable cultivation mechanism, and a drip irrigation assembly. The housing contains an atomizing irrigation assembly and a three-stage filtration and circulation system. The atomizing irrigation assembly is connected to an atomizing sprayer via a replenishment pipe, a storage pipe, and a water guide pipe, achieving precise atomized nutrient supply to the roots. The drip irrigation assembly forms a zoned, controllable irrigation network through a first water guide pipe, a second water guide pipe, and drip irrigation holes. The cultivation mechanism includes a detachable cultivation trough, with bottom filter holes and absorbent sponges working together to regulate humidity. Combined with an electric telescopic rod, the harvesting structure can be lifted with a single button. Through dual-mode irrigation coordination and closed-loop water and fertilizer recycling, it achieves efficient water saving and nutrient solution recycling. The electric telescopic rod allows for one-button lifting of the cultivation mechanism without disassembling the equipment structure, reducing tuber breakage and solving the technical bottlenecks of resource waste and inefficient harvesting associated with traditional equipment.

This invention relates to the field of marine technology, specifically disclosing a BOG reliquefaction system for ammonia fuel on a CO2 transport ship. The system includes a liquid ammonia fuel tank, a liquid CO2 storage tank, and a jetting and diversion device. The working fluid inlet and ejector fluid inlet of the jetting and diversion device are connected to the BOG outlet of the liquid CO2 storage tank and the BOG outlet of the liquid ammonia fuel tank, respectively. The mixing fluid outlet of the jetting and diversion device is connected to the inlet of a heat exchanger. The outlet of the heat exchanger is connected to a gas-liquid separator. The CO2 outlet of the gas-liquid separator is connected to a CO2 buffer tank. The first outlet of the CO2 buffer tank is connected to a refrigeration unit, where cooling generates liquid CO2 that flows back to the liquid CO2 storage tank. The liquid ammonia outlet of the gas-liquid separator is connected to the liquid ammonia fuel tank. This invention, with jetting and diversion as its core, achieves efficient synergistic processing of two types of BOG, cold energy recycling, and precise control of storage tank pressure, ensuring flexible and rapid pressure and temperature regulation to meet the needs of complex marine operating conditions.

The utility model belongs to photovoltaic equipment cleaning technical field, concretely relates to a water -saving photovoltaic panel cleaning device based on centrifugal water and sand separation, including a plurality of photovoltaic panels, the upper portion of which is provided with a spraying assembly, the lower portion of which is provided with a water receiving assembly, the water receiving assembly is connected with the water and sand separation assembly, the water and sand separation assembly is connected with the water circulation assembly, the water circulation assembly is connected with the power system, and the power system and the water circulation assembly are electrically connected with the control system; the device is integrated with the spraying assembly, the water receiving assembly, the water and sand separation assembly, the water circulation assembly, the power system and the control system, realizes the closed loop recycling of cleaning water, reduces water resource consumption, and can efficiently remove sand particles through the centrifugal water and sand separation technology, reduces the risk of nozzle blockage, simultaneously utilizes the structure of photovoltaic panel self -power supply and is applicable to the area without power grid, and the overall structure is simple and reliable, convenient to maintain, is especially suitable for the efficient operation and maintenance of photovoltaic power station in arid sand area, and gives consideration to water saving, economy and environmental adaptability.