86 results about "Mixed waste" patented technology

The embodiment of the invention relates to the technical field of industrial process control and mixed waste plastic pyrolysis, in particular to a self-adaptive model prediction control system for a mixed plastic pyrolysis process. The system comprises a state sensing unit, a key energy mapping unit, an enthalpy flow planning unit and an execution feedback unit. The system identifies a chemical reaction dominant type by analyzing a gas generation rate curve; the core of the method is that a reaction type is converted into a physical energy demand containing energy flow density and action time, and a three-dimensional dynamic enthalpy flow control instruction and a self-adaptive switching strategy are generated according to a differential energy barrier of polyvinyl chloride dechlorination and polyolefin cracking; according to the invention, conversion from single steady state control to space-time energy potential accurate matching is realized, and the problem of energy level mismatching is effectively avoided.

A system for selectively opening flexible containers, such as plastic bags, in a mixed solid waste stream is disclosed, for use in Material Recovery Facilities (MRFs) or other contexts. The system may include a conveyor configured to transport waste, a sensor configured to detect the presence and position of flexible containers, and a multi-degree-of-freedom positioning device that moves a cutting tool relative to the containers. A processor, in communication with the sensor and positioning device, may calculate a cutting path and control the positioning device to execute the cutting operation. The system may utilize various cutting tools, including punches, blades, spades, shovels, and motorized saws, as well as non-contact fluid-based cutting technologies such as air or water jets. Additionally, the system can dynamically adjust the cutting trajectory based on real-time feedback and environmental conditions. The method provides an adaptable solution to open bags without damaging recyclable materials, improving throughput and reducing waste in mixed waste streams.

The invention discloses a method for recycling PA66 / PET (Polyamide 66 / Polyethylene Terephthalate) mixed waste. The recycling and regenerating method comprises the following steps: under the action of a catalyst, carrying out hydrolysis reaction on the PA66 / PET mixed waste; wherein the catalyst is adipic acid, and the use amount of the catalyst is 10-30 wt% of the amount of the mixed waste according to the mass percentage. An adipic acid autocatalysis system is adopted, efficient hydrolysis of PA66 and PET is achieved at the same time under the single reaction condition, the defect that step-by-step treatment is needed in a traditional process is overcome, the hydrolysis rate of PET is larger than or equal to 85%, the hydrolysis rate of PA66 is 50-70%, hydrolysis products can be further polymerized into polyesteramide with excellent mechanical performance and thermal stability, and the preparation method is suitable for industrial production. And the spanning from degradation recovery to upgrading regeneration is realized.

The utility model provides a combined heat and power supply air supply system of a fuel cell, which utilizes a byproduct high-pressure pure oxygen generated by hydrogen production through water electrolysis as a working fluid, realizes air humidification and cyclic utilization of electric pile waste gas through combination of an injection device and an air compressor branch, reduces the use of a humidifier and an intercooler, and reduces the complexity and air flow resistance of the system. The system comprises an air inlet main path, an oxygen inlet branch path, an air inlet branch path and an injection device, waste oxygen is introduced into the oxygen inlet branch path, the air inlet branch path is provided with an air compressor, and the injection device mixes the waste oxygen and fresh air and supplies the mixed waste oxygen and fresh air into a galvanic pile. The air outlet pipeline is connected with the water segregator, waste gas is recycled to humidify fresh air, and a backflow adjusting valve is arranged. The system reduces the power consumption of the air compressor and improves the cogeneration efficiency of the fuel cell.

The invention belongs to the field of waste liquid recycling, and discloses a method for preparing potassium fluosilicate by using mixed waste acid, which comprises the following steps: S1, silica fume acidification pretreatment: soaking silica fume in an acid solution for acidification, carrying out precipitation separation on the silica fume, drying, and grinding to obtain acidified silica fume; s2, mixing the raw materials: uniformly mixing the acidified silica fume and the silicon dioxide powder; s3, preparation of fluosilicic acid: adding a mixture of acidified silica fume and silicon dioxide powder into the mixed waste acid, and uniformly stirring by a mechanical stirrer; and S4, preparation of potassium fluosilicate: adding a potassium chloride saturated solution into the fluosilicic acid solution to generate potassium fluosilicate precipitate. The method has the advantages and effects of being high in fluorine ion utilization efficiency, low in production cost and high in finished product purity.

The invention discloses cleaning equipment and a cleaning system. The cleaning equipment comprises a machine body, a cleaning assembly and a dirt collecting assembly. A dirt collecting tank is arranged on the machine body; the cleaning assembly is arranged at the bottom of the machine body and can rotate around the axis. The dirt collecting assembly is arranged at the bottom of the machine body and close to the cleaning assembly so as to be at least used for collecting solid-liquid mixed garbage at the cleaning assembly, the dirt collecting assembly communicates with the dirt collecting box through a dirt pumping channel, and a filtering piece is arranged between the dirt pumping channel and the dirt collecting assembly. The problems that in the prior art, solid foreign matter collected by cleaning equipment is likely to move into a sewage tank along with sewage, the cleaning difficulty of the sewage tank is increased, and a sewage inlet pipeline is likely to be blocked are solved.

The invention discloses a cyclic regeneration method of PA66 waste toughened by POE-g-MAH under the catalysis of adipic acid. Comprising the following steps: mixing POE-g-MAH toughened PA66 waste, a catalyst adipic acid and water, carrying out a hydrolysis reaction, and stopping the reaction until the hydrolysis rate of PA66 is greater than or equal to 80%; carrying out a repolymerization reaction on the hydrolysate and additionally added hexamethylenediamine under the action of a catalyst to obtain a regenerated material; wherein the use amount of the catalyst adipic acid is 20 to 30 weight percent of the POE-g-MAH toughened PA66 waste. According to the method, the recycling of the mixed waste of the grafted POE toughened PA66 can be realized, and the elastomer phase is in an in-situ micro-nano dispersion state of 0.3-1.0 mu m in the repolymerization process, so that the regenerated material also has excellent mechanical properties.

Chemical recycling facilities for processing mixed waste plastic are provided herein. Such facilities have the capability of processing mixed plastic waste streams and utilize a variety of recycling facilities, such as, for example, solvolysis facility, a pyrolysis facility, a cracker facility, a partial oxidation gasification facility, an energy recovery facility, and a solidification facility. Streams from one or more of these individual facilities may be used as feed to one or more of the other facilities, thereby maximizing recovery of valuable chemical components and minimizing unusable waste streams.

The present invention discloses an automated waste sorter (100) for sorting / segregating one or more categories of materials from a mixed waste stream. The automated waste sorter (100) includes a primary conveyor belt (110), an encoder (170), one or more sensors (131), a vision system (130) and an ejection means (150). The primary conveyor belt (110) moves the mixed waste stream at a predefined speed. The vision system (130) is trained to analyze the frame to identify, classify and locate one or more classified waste material using at least one of a plurality of identity parameters and / or a plurality of other parameters. The ejection means (150) includes one or more manifolds to eject the one or more classified waste material based on the one or more coordinates communicated by the vision system (130). A method to operate the automated waste sorter (100) is also disclosed.

The invention belongs to the field of recycling plastic waste, particularly mixed plastic, recycling of which is very challenging. The invention relates to a device and a method for processing mixed waste plastic (MWP) and products made from mixed waste plastic. The mixed waste plastic comprises at least two of the following plastics: acrylonitrile butadiene styrene (ABS), ABS and glass fibre composite (ABS GF), polycarbonate (PC), polycarbonate and glass fibre composite (PC GF), PC-ABS composite, polyamide (PA), polybutylene terephthalate (PBT), and quartz sand (QS) with granulation up to 3 mm mixed in a selected ratio, which is from 30% : 70% to 60% : 40%. The method comprises the following steps: a) mixing MWP and QS, b) leading the prepared mixture to the extruder comprising a shaft with blades arranged for mixing and moving the material along the extruder, wherein the extruder is heated to a temperature between 200 and 250 °C, c) extruding the material from the extruder to a heated container, heated so that the temperature of the material inside it is between 210 and 240 °C, d) leading the material into a mould inside a press arranged to compress the mould, which presses the material into the desired shape, wherein said mould is cooled so that the product is cooled to a temperature between 60 and 90 °C and hardens.

Disclosed herein are systems and methods for a waste processing system. The system comprises a container preparation area wherein containers are prepared for in-container vitrification processes, a feed area where spent media, recycled waste, and one or more of glass frit, silica sand, or glass formers, are blended to form blended waste. The blended waste is metered into a prepared container from the container preparation area as electricity is applied to electrodes placed in the waste within the container, thereby creating heat sufficient to melt the contents of the container. This results in a container containing vitrified glass product with entrained contaminants. The system includes a container cooling area where the processed container may be cooled, and a container disposition area where the processed container may be surveyed, decontaminated, sealed, shielded, and / or prepared for storage.

The invention relates to the technical field of waste gas pretreatment towers, and discloses an efficient multistage cyclone mixed waste gas pretreatment tower which comprises a waste gas tank, a fixing plate is fixedly connected to the inner wall of a tower body, the top end of the fixing plate is fixedly connected with a motor, and the output end of the motor is fixedly connected with a first gear. A plurality of second gears are connected to the tooth end of the first gear in a meshed mode, toothed plates are connected to the tooth ends of the second gears in a meshed mode, second rotating shafts are fixedly connected to the interiors of the second gears, mixing blades are fixedly connected to the outer walls of the second rotating shafts, and turbulent flow blades are fixedly connected to the outer wall of the first rotating shaft. According to the mixing assembly, synchronous reverse rotation of a first rotating shaft and a second rotating shaft is achieved through cooperative transmission of a first gear and a second gear of a motor driving gear set, mixing blades and turbulent flow blades are driven to form a multi-stage rotational flow disturbance field, and the contact area and the shear mixing strength of waste gas and spraying washing liquid are greatly increased.

This invention relates to the field of industrial waste acid treatment and resource recycling technology, and particularly to a method for the resource-based treatment and recycling of pickling waste liquid from hot-rolled titanium coils. The method includes: based on the mixed waste acid liquid discharged from the acid tank, continuous measurement and recording, filtration, impurity separation, and pretreatment liquid preparation are performed to obtain a first pretreatment liquid record; then, alkali solution is added, stirred, and a first pH window is adjusted, followed by precipitation and solid-liquid separation to obtain a first supernatant record; next, alkali solution is added, stirred, and a second pH window is adjusted to obtain a first mother liquor record; finally, diffusion dialysis or selective ion exchange membrane separation is performed to obtain a first regenerated acid liquid record, which is then mixed with fresh acid liquid after concentration detection to obtain a first recycling record. This invention, through graded precipitation and a complete recording chain, achieves stepwise separation of iron and titanium components and efficient recovery and reuse of acid liquid, significantly improving the resource utilization level.

The invention discloses a method for preparing high-purity titanium powder by taking titanium-aluminum waste as a raw material, which comprises the following steps: annealing a titanium-aluminum waste mixture at 400-600 DEG C in an inert atmosphere to remove organic waste in the titanium-aluminum mixed waste, and carrying out reduction deoxidation reconstruction on surface oxides of the titanium-aluminum waste by using reducing micromolecules generated by pyrolysis depolymerization of the organic waste, a clean titanium and aluminum mixture is obtained; the titanium and aluminum mixture is placed in the dense medium liquid, the aluminum material floats above the dense medium liquid, the titanium material sinks to the lower portion of the dense medium liquid, and separation is achieved; the method comprises the following steps: placing a titanium material in a closed reactor, reacting by using gaseous high-reactivity Lewis acid salt, and converting the titanium material into gaseous low-valence titanium chloride; the gaseous low-valence titanium chloride is guided into an inlet-outlet high-temperature-gradient high-temperature decomposition reactor in a high-frequency pulse mode, and is converted into high-purity titanium powder in the process of passing through the high-temperature decomposition reactor, and the high-purity titanium powder is deposited in a collection area of the reactor.

An air fryer, including a heating head part, having a cover, the cover including at least an upper shell, and a heating tube protection lower cover, the heating tube protection lower cover being arranged in the lower space of the cover through a heating tube support, the heating tube protection lower cover being provided with a plurality of heat air vents on the bottom, and a heating element cooperating to blow hot air into a hot air exhaust channel; an output motor is arranged in the upper shell, and a transmission shaft is fixed with a heating fan blade; characterized in that the cover is internally provided with a heating tube upper cover, thereby dividing the space in the cover into an upper cavity and a lower cavity; the lower cavity is used to arrange the heating tube and the heating fan blade; the upper cavity above the top of the heating tube upper cover is provided with a cold air assembly as a cooling mechanism; the cold air assembly includes a cooling fan blade, which is also fixed on the transmission shaft of the output motor; the upper shell and the motor cover are provided with a cold air outlet on the side, and the air outlet is arranged to communicate with the mixing chamber outside the mixing cover; after cooling, the mixed waste air is discharged through the exhaust port, the temperature of the waste gas is reduced, and the structure is reasonably arranged, thereby prolonging the service life of the electronic components, preventing accidental start, being easy to operate, and being safer.

This application relates to a method, system, terminal, and medium for producing lightweight aggregates based on hazardous waste, belonging to the field of hazardous waste treatment technology. The method includes: obtaining information on the type of hazardous waste; pre-treating the hazardous waste according to the type information to obtain waste to be processed; collecting the chemical composition and elemental content of the waste to be processed; generating a mixing ratio and an auxiliary material ratio based on the chemical composition and elemental content, using a preset processing standard as a reference; mixing the waste to be processed according to the mixing ratio, and adding auxiliary materials according to the auxiliary material ratio to form a mixed waste; and sintering the mixed waste to obtain lightweight aggregates. This application has the effect of improving the sintering effect of lightweight aggregates.

The invention relates to the technical field of resource recovery, in particular to a titanium white waste acid and acid wastewater collaborative resource utilization method and a treatment system. The method comprises the following steps: carrying out membrane concentration pretreatment on acidic wastewater generated in the titanium dioxide production process to obtain reuse water and concentrated acid water containing sulfuric acid and metal ions; mixing the concentrated acid water with the pretreated titanium dioxide waste acid to obtain mixed waste acid, and feeding the mixed waste acid into a multi-effect evaporation and concentration unit for concentration to obtain concentrated waste acid; the concentrated waste acid is subjected to a pre-pyrolysis drying reaction at the temperature of 250-400 DEG C, and a solid product and sulfur-containing tail gas are obtained; the sulfur-containing tail gas is condensed, concentrated sulfuric acid with the mass concentration not lower than 90% is obtained through recovery, and uncondensed tail gas is discharged after being purified. By precisely regulating and controlling the temperature window of the pre-pyrolysis drying reaction, solid products can be directionally produced, the additional value is remarkably improved, the acid purchasing cost of enterprises can be reduced by recycling high-purity concentrated sulfuric acid, and the overall economic benefit is very remarkable.

The invention relates to a brick-mixed garbage separation and regeneration method and device. The brick-concrete garbage separation and regeneration method comprises the steps that S1, in the brick-concrete garbage feeding process, material components and bonding characteristics are detected; s2, according to a detection result, determining a unique brick-concrete dissociation mechanism corresponding to each part of materials in the n brick-concrete dissociation mechanisms, sorting each part of materials, and transmitting the sorted materials to the corresponding brick-concrete dissociation mechanisms; s3, based on the n brick-concrete dissociation mechanisms, differentiated crushing treatment is conducted on the brick-concrete garbage conveyed to the n brick-concrete dissociation mechanisms; s4, the materials crushed by the n brick-concrete dissociation mechanisms are screened, and brick materials and concrete materials are obtained; s5, sorting and purifying the concrete material obtained in the step S4; s6, crushing the concrete material separated and purified in the step S5 to obtain concrete aggregate; and S7, screening the concrete aggregate obtained by crushing in the step S6, and outputting the concrete aggregate in a plurality of particle size intervals.

The embodiment relates to the technical field of industrial process control and mixed waste plastic pyrolysis, and particularly relates to a self-adaptive model predictive control system for a mixed plastic pyrolysis process; containing state perception, key energy mapping, enthalpy flow planning and execution feedback unit; the system identifies a chemical reaction dominant type by analyzing a gas generation rate curve; the core is to convert the reaction type into physical energy demand containing energy flow density and action time, generate three-dimensional dynamic enthalpy flow control instructions and self-adaptive switching strategies aiming at the differentiated energy barriers of polyvinyl chloride dechlorination and polyolefin cracking; the application realizes the transformation from single steady-state control to accurate matching of time-space energy potential, and effectively avoids the energy level mismatching problem.

The invention discloses a method for synergistically leaching lithium and cobalt from lithium cobalt oxide and lithium iron phosphate positive electrode mixed waste, which comprises the following steps: mixing the two wastes according to a Fe / Co molar ratio of 1.4-1.8, reacting in 1.0-1.5 mol / L sulfuric acid at 20-40 DEG C for 80-100 minutes, leaching lithium and cobalt by using the self-oxidation-reduction action of the sulfuric acid, recovering valuable metals from a leaching solution, and recycling the valuable metals from the leaching solution. Leached residues are used as iron phosphate by-products; according to the method disclosed by the invention, by utilizing the inherent oxidation-reduction characteristic between lithium cobalt oxide and lithium iron phosphate, the spontaneous oxidation-reduction reaction is realized in the acid leaching process, and the situation that hydrogen peroxide and other oxidizing agents or reducing agents need to be additionally added in the traditional process is avoided, so that the reagent purchasing cost is directly saved, and the production efficiency is improved. And safety risks caused by storage and use of the unstable chemicals are also eliminated.

1. A maintenance base station (10) for a cleaning device (20), wherein the maintenance base station (10) comprises: a waste inlet tube (103), one end of the waste inlet tube (103) is configured to connect to the cleaning device (20), to discharge a solid-liquid mixture from the cleaning device (20); a mixed waste channel (104) in communication with the other end of the waste inlet pipe (103); and a spray head (7) disposed at least partially in the mixed waste channel (104) and configured to clean the mixed waste channel (104). 2. The maintenance base station (10) according to claim 1, wherein a first end of the spray head (7) is connected to a clean water pipe, and a second end of the spray head (7) is disposed in front of an inner side wall of the mixed waste channel (104), so that clean water is sprayed onto the inner side wall of the mixed waste channel (104) through the spray head (7). 3. The maintenance base station (10) according to claim 2, wherein the second end of the spray head (7) is connected to a plurality of secondary spray tubes, and clean water is sprayed towards the inner side wall of the mixed waste channel (104) for rinsing through the plurality of secondary spray tubes. 4. The maintenance base station (10) according to any of claims 1 to 3, wherein the spray head (7) comprises a spray tube, a first end of the spray tube is connected to a clean water tube, a second end of the spray tube is a closed end, the wall of the spray tube is provided with a plurality of through holes, and the plurality of through holes are arranged uniformly from top to bottom along a peripheral wall of the spray tube. 5. The maintenance base station (10) according to any of claims 1 to 4, further comprises: a drive mechanism connected to the spray head (7) and configured to drive the spray head (7) to move up and down, thereby performing spray cleaning on parts of the mixed waste channel (104). 6. The maintenance base station (10) according to any of claims 1 to 5, wherein the spray head (7) is arranged on top of the mixed waste channel (104). 7. The maintenance base station (10) according to any of claims 1 to 6, wherein the lower part of the mixed waste channel (104) is provided with a baffle configured to be controlled so as to open or close, in order to form a mixed waste receiving chamber (6); and the maintenance base station (10) comprises a housing (101), and the mixed waste receiving chamber (6) is disposed in a central upper part of the housing (101). 8. The maintenance base station (10) according to claim 7, wherein a lower wall (61) of the mixed waste receiving chamber (6) is configured with a conical shape, such that the lower wall (61) is provided with a lower point; and the lower wall (61) is provided with a liquid outlet (62), and the liquid outlet (62) is located at the lowest point of the lower wall (61). 9. The maintenance base station (10) according to any of claims 1 to 8, further comprises: a solid-liquid separation assembly (1) located in a solid-liquid mixture flow path and configured to separate the solid-liquid mixture in order to form wet waste and wastewater. 10. The maintenance base station (10) according to claim 9, wherein the mixed waste channel (104) is arranged on the solid-liquid separation assembly (1). 11. The maintenance base station (10) according to claim 9, wherein at least a portion of the mixed waste channel (104) is disposed above the solid-liquid separation assembly (1), such that an orthographic projection of the mixed waste channel (104) in a horizontal plane overlaps at least partially with an orthographic projection of the solid-liquid separation assembly (1) in the horizontal plane. 12. The maintenance base station (10) according to any of claims 9 to 11, further comprises: a wastewater discharge mechanism (8) configured to empty the wastewater separated by the solid-liquid separation assembly (1). 13. The maintenance base station (10) according to claim 12, wherein the wastewater discharge mechanism (8) comprises: a wastewater pipe, one end of the wastewater pipe is in communication with the solid-liquid separation assembly (1) and the other end of the wastewater pipe is connected directly to a sewer pipe. 14. The maintenance base station (10) according to any of claims 9 to 13, wherein the solid-liquid separation assembly (1) is a gravity-based filtration separation assembly or a centrifugal filtration separation assembly. 15. A cleaning system, wherein the cleaning system comprises: a cleaning device (20); and the maintenance base station (10) for the cleaning device (20) according to any of claims 1 to 14.

The invention provides a method for recovering indium and bismuth from waste, and relates to the technical field of non-ferrous metal hydrometallurgy. The invention discloses a method for recovering indium and bismuth from waste materials. The method comprises the following steps that mixed waste materials containing indium and bismuth are obtained; adjusting the concentration of hydrogen ions in the mixed waste to a first concentration, carrying out primary agitation leaching, and separating to obtain a first-section leaching solution and first-section leaching residues; carrying out oxidation impurity removal treatment on the first-section leaching solution to remove first impurity ions in the first-section leaching solution, so as to obtain a purified solution; through metal replacement, indium ions in the purified liquid are subjected to metal replacement treatment, and crude indium is obtained; mixing the first-stage leaching residues, an acid leaching agent and a first oxidizing agent, carrying out secondary agitation leaching, and separating to obtain a second-stage leaching solution; and hydrolyzing the second-stage leachate, and separating to obtain a bismuth salt precipitate. According to the method, the indium recovery rate is greater than or equal to 98%, the bismuth recovery rate is greater than or equal to 95%, the refined indium grade is greater than or equal to 99.998%, and the bismuth salt precipitate purity is greater than

The application provides a detachable staggered cyclone mixed waste gas and waste liquid incineration device, which comprises a top burner, a combustion box, a feeding ring pipe, a longitudinal connecting pipe, a material spraying device, a box descaling device and an exhaust pipeline, the combustion box comprises a conical part and a cylindrical part, the top burner is fixedly installed at the top end of the conical part and extends into the conical part, a plurality of feeding ring pipes are sleeved on the outer ring of the cylindrical part, and the longitudinal connecting pipe is connected with the feeding ring pipes; the material spraying device extends into the cylindrical part from the outside of the cylindrical part; the box descaling device is fixedly installed at the bottom of the cylindrical part, and the exhaust pipeline extends from the inside of the cylindrical part to the outside. The application can automatically adjust the spraying angle of the material spraying gun and the point distribution of the material spraying gun according to different characteristics of waste gas and waste liquid, and the material spraying device is convenient to detach.

This invention provides a method for preparing hydrocarbons, the method comprising the following steps: S1) pyrolyzing mixed waste to generate a first mixed gas; S2) reforming the first mixed gas (after removing impurities) in a first fluidized bed reactor with steam to prepare a second mixed gas; S3) separating the second mixed gas into a first stream containing carbon dioxide and a second stream containing hydrogen and carbon monoxide; S4) feeding the first stream separated in step S3) into a second fluidized bed reactor and converting it into carbon monoxide via a reverse Boudouar reaction; S5) mixing the second stream and the carbon monoxide converted in step S4) to generate a third mixed gas, and preparing syngas from the third mixed gas via a water-gas shift reaction; and S6) generating hydrocarbons from the syngas via a catalytic reaction.

This invention relates to a mixed waste treatment device, comprising: a housing; a bag-breaking device including a first inlet, a first outlet, and a bag-breaking mechanism; a screening device including a second inlet connected to the first outlet, a second outlet communicating with the second inlet, and a screening mechanism disposed between the second inlet and the second outlet; an auxiliary treatment device including an air-separating mechanism installed within the screening device and positioned close to the second inlet; and a rotating assembly including a hook on the rotating assembly and an auxiliary air outlet disposed on one side of the rotating assembly and supplying a first airflow toward the rotating assembly. Strip-shaped objects in the second target material can drift toward the rotating assembly under the action of the first airflow and be hooked onto the hook. This method effectively prevents strip-shaped objects from entangled in the subsequent screening mechanism, significantly reducing the risk of equipment jamming and screen blockage, thereby ensuring the treatment efficiency of the mixed waste treatment device.

This invention relates to a highly selective absorbent for sulfur dioxide in industrial mixed waste gas, comprising: a metal ion and an organic ligand connected together; wherein the metal ion is a four-coordinate metal ion or a six-coordinate metal ion; and wherein the organic ligand contains a zimidazole group. The beneficial effects of this invention are: it can reduce the lower limit of SO2 absorption to the ppb level, achieving ultra-low emissions; and it can efficiently absorb SO2 with a wide SO2 / CO2 ratio range, making it more suitable for the constantly changing operating conditions in actual industrial applications.

The invention provides a preparation method and an application scheme of a layered multifunctional solid catalyst Ru / Nb-MMT based on montmorillonite (MMT). The preparation method is characterized by comprising the following steps: fully mixing and stirring a niobium soluble solution and a carrier montmorillonite, and then roasting in a muffle furnace at the temperature of 400 DEG C or above for 4 hours to prepare a yNb-MMT carrier (y is the mass ratio of Nb); and finally, loading Ru onto the Nb-MMT by an impregnation method, and drying and reducing to obtain the xRu / yNb-MMT catalyst (wherein x is the mass ratio of Ru). The Ru / Nb-MMT catalyst prepared by the method can be used for catalyzing and hydrogenating complex components such as polyolefin, oxygen-containing plastic and chlorine-containing plastic by a one-pot method, and under the auxiliary action of auxiliaries such as calcium oxide and magnesium oxide, the yield of non-solid products can reach 80% or above. The catalyst is good in economy and convenient to prepare, has the advantages of high activity, high inactivation resistance and the like, is simple in reaction process, and has the prospect of large-scale conversion of mixed waste plastics.

This disclosure relates to a method (100) for obtaining purified plastic material (10) from a mixed waste material stream (PS). The method comprises using a near-infrared spectroscopy system to distinguish a first type of plastic material (110a). Separating the first type of plastic material into a first type of plastic material fraction (2) (110b). Reducing the size of the material items in the first type of plastic material fraction (120). Subjecting the first type of plastic material fraction to a washing step (130). Distinguishing the washed first type of plastic material fraction (140a), separating the washed first type of plastic material fraction (140b), thereby obtaining purified plastic material. This disclosure further relates to a system (1) for obtaining purified plastic material (10) from a mixed waste material stream (PS).

The utility model discloses a kind of tab middle-placed devices, comprising: conveying mechanism, for supporting and conveying tab;Scrape suction mechanism, for scraping and sucking slurry on tab surface, including second support, several scrape suction components and negative pressure component, the scrape suction component includes scraping head and the second driving part for driving the scraping head moves up and down;Liquid supply mechanism, for providing diluent to the scraping head and diluting scraped slurry, including diluent box, pump group and several liquid supply pipes, the pump group is pumped into several scraping head in the diluent box in several liquid supply pipes by diluent;Waste liquid recovery mechanism, for recycling diluted mixed waste liquid, including buffer tank and several recovery pipes, the negative pressure component is connected on the buffer tank by negative pressure pipe, several scraping head is connected buffer tank by several recovery pipes respectively.The utility model can greatly reduce the manufacturing cost of equipment, energy consumption cost and subsequent maintenance cost, and, metal dust generated when laser cutting can also avoid damage to human body.

The invention relates to the technical field of drilling machines, and discloses a drilling machine waste chip centralized collection structure and a numerical control drilling machine. The upper end of a base is connected with a drilling assembly through a stand column, the upper end of the base is provided with a temporary storage barrel located under the drilling assembly, the upper end of the temporary storage barrel is provided with an air injection seat assembly, and the outer side of the upper end of the air injection seat assembly is provided with a protection barrel; an air injection assembly is arranged in the air injection base assembly, and a workbench assembly for driving the air injection assembly is arranged in the protection barrel. When the workbench assembly rotates, airflow generated by the air injection assembly is driven to be finally downwards sprayed to the surface of the rotary disc from the air outlet groove in the side edge of the protruding base, it is guaranteed that the airflow blows off mixed sweeps attached to the rotary disc and a workpiece with enough impact force, and the sweeps are prevented from being attached to and remaining on a cooling liquid; the centrifugal force generated by rotation of the turntable is matched with the airflow effect, so that scraps and a small amount of cooling liquid are thoroughly separated from the turntable, manual contact cleaning is not needed in the whole process, the labor cost is saved, and the safety risk of manual operation is avoided.