61results about How to "Enable recycling" patented technology

This invention relates to the technical field of fire hydrants and discloses an intelligent fire hydrant with water consumption monitoring function, comprising: a hydrant end cap at the upper end of the hydrant body assembly, and an equipment assembly installed inside the hydrant end cap; a transparent detection window on the hydrant body assembly, a rod inside the transparent detection window, a central rotating shaft installed on the inner side of the transparent window assembly, and a rotating scraper on the central rotating shaft; the rod can detect the water level in the hydrant body in real time, and the rotating scraper can clean the dirt on the surface of the transparent window assembly; this invention, through the coordinated linkage structure of the float, rod, and float plate inside the transparent detection window, combined with the visual observation slot design of the transparent window assembly, realizes real-time accurate monitoring and intuitive visual feedback of water consumption in the fire hydrant, effectively solving the technical pain points of traditional fire hydrants lacking convenient monitoring methods and having difficulty in accurately controlling water consumption.

This invention relates to the field of industrial unmanned aerial vehicle (UAV) technology, specifically a hydrogen fuel cell and lithium battery hybrid UAV. The UAV includes a fuselage, a high-pressure hydrogen storage tank fixedly mounted on top of a gas cylinder mounting base, a battery stack mounted on the bottom of a mounting frame assembly, and a circuit control module located inside the mounting frame assembly. This hydrogen fuel cell and lithium battery hybrid UAV, based on multi-source data fusion and a sliding window anti-disturbance design, achieves accurate identification of all operating conditions, including steady-state cruise, high-power transients, surplus recharge, and regenerative braking. It is equipped with a differentiated intelligent power allocation algorithm, enabling a dynamic allocation strategy that allows for continuous and stable main power supply from the fuel cell during cruise, coordinated lithium battery replenishment during high-power conditions, and real-time recharge of the lithium battery with surplus power. Through a power change rate feedforward compensation design, it maximizes the utilization of the high energy density of hydrogen energy while simultaneously achieving energy recovery and reuse, further improving the system's energy utilization rate.

The utility model belongs to the field of agricultural instruments, and particularly relates to an agriophyllum squarrosum recycling device which comprises an agriophyllum squarrosum recycling body and a conveying supporting plate, the agriophyllum squarrosum recycling body is fixedly installed on the upper surface of the conveying supporting plate, the agriophyllum squarrosum recycling body comprises an air exhaust assembly, a cutting assembly and a storage cavity, and the air exhaust assembly is in threaded connection with the upper portion of the cutting assembly; the storage cavity is in threaded connection below the cutting assembly; the cutting assembly comprises a stepped cutting cavity and cutting blades, a supporting seat is integrally connected to the bottom of the stepped cutting cavity, a rotating shaft is fixedly connected to the center of the supporting seat, a plurality of sets of cutting blades are fixedly connected to the rotating shaft, and the cutting blades are longitudinally and fixedly installed on the rotating shaft at equal intervals; when the agriophyllum squarrosum is conveyed into the cutting assembly, the agriophyllum squarrosum can be smashed and collected into the storage cavity through cutting of the multiple sets of cutting blades, the processed agriophyllum squarrosum can serve as medicine, organic fertilizer and feed, recycling is achieved, and more economic benefits are brought.

The invention belongs to an amide intermediate treatment device and method for hydrazine hydrate production. Comprising a concentration tank, the concentration tank is provided with a water-phase reaction liquid inlet pipeline and a catalyst inlet, the catalyst inlet is connected with a quartz sand catalyst preparation unit, an outlet of the concentration tank is connected with a concentrated material inlet of an intermediate recovery kettle, and the intermediate recovery kettle is further connected with an ammonia feeding pipeline. An ammoniation liquid outlet of the intermediate recovery kettle is connected with a separation and recovery unit, and a liquid phase outlet of the separation and recovery unit is connected with a hydrazine compound synthesis section; a steam discharge pipeline is arranged at the top of the concentration tank; the method has the advantages that moisture in the water-phase reaction liquid can be removed, ammonium formate is converted into formamide and recycled, meanwhile, metal ions are prevented from being contained in ammoniation liquid, and further, the treatment cost is reduced and continuous treatment is achieved on the basis of energy conservation and consumption reduction.

The utility model provides a kind of industrial silicon powder granulating device, comprising: granulator body, the screening device of being equipped in the discharge port below of granulator body, the conveying plate of being fixed in the discharge port below of screening device, the powder elevator of being equipped in granulator body, conveying plate side, the inlet of powder elevator of being equipped in the lower end of conveying plate, the discharge port of powder elevator being equipped in the above of granulator body;Through above-mentioned scheme, screening device can promptly, effectively screen the particle produced by granulator, effectively separate qualified particle meeting granularity requirement and unqualified particle or powder, powder recycling is realized by powder elevator, avoid the waste of powder, reduce the consumption of raw material, reduce the raw material procurement cost of enterprise.

The utility model discloses a sand core finishing and discharging device which comprises a core finishing unit and a discharging unit, the core finishing unit comprises a fixed base, a mechanical arm and a core finishing floating main shaft, and an air cylinder in driving connection with the core finishing floating main shaft is arranged on one side of the fixed base; the discharging unit is sequentially provided with a sand core fixing table, a discharging sliding table and a moving tool from top to bottom, a supporting column, a limiting wheel support and a positioning column are arranged on the sand core fixing table, a discharging hole is formed in the sand core fixing table, a material collecting hole corresponding to the discharging hole is formed in the top of the discharging sliding table, and discharging side holes are formed in the two sides of the discharging sliding table. The bottom of the discharging sliding table is in sliding connection with a guide rail on the movable tool. Through the arrangement, the sand core during transportation after core repairing is finished is protected, the situation that the sand core is collided and damaged in the core repairing process is prevented, and the sand core production success rate is increased; and dust raising caused by a large amount of waste generated during core repairing is prevented, a good working environment is maintained, the health of workers is protected, the waste is collected more conveniently, and recycling and reusing of the waste are achieved.

The invention discloses a carbon fiber production waste liquid recycling process, which comprises: (1) inputting a waste liquid containing acrylonitrile and dimethyl sulfoxide into an acrylonitrile recovery tower, controlling the pressure and the temperature, enabling acrylonitrile and a part of water to form a gas phase, and separating the gas phase from the tower top to obtain dimethyl sulfoxide and water at the tower bottom; (2) dimethyl sulfoxide and water at the bottom of the acrylonitrile recovery tower sequentially enter a first-stage dehydrating tower, a second-stage dehydrating tower and a third-stage dehydrating tower, water is discharged from the tops of the dehydrating towers, and dimethyl sulfoxide at the bottom of the tower is purified step by step until the concentration reaches 99.5% or above; and (3) the purified dimethyl sulfoxide enters a rectifying tower, the pressure and the temperature are controlled, dimethyl sulfoxide impurities exist at the tower bottom, dimethyl sulfoxide forms a gas phase, the gas phase is discharged through the tower top, and after condensation and recovery, a pure dimethyl sulfoxide product without impurities is obtained. The process is efficient, environment-friendly and energy-saving, and the recovery rate of acrylonitrile and dimethyl sulfoxide is high.

The utility model relates to metallographic sample preparation equipment. Comprising a sample preparation device, a spray head is arranged on the sample preparation device, the purification mechanism comprises a water collecting tank, a solution inlet and a solution outlet are formed in the two ends of the water collecting tank respectively, the solution inlet is connected with a liquid outlet of the sample preparation device, and the solution outlet is connected with the spray head. The interior of the water collecting tank is divided into a plurality of settling areas, the settling areas are sequentially distributed in the direction from the solution inlet to the solution outlet, every two adjacent settling areas are communicated, and an electromagnet is arranged in at least one settling area. The sample preparation device is connected with the water collecting tank, flushing fluid is sequentially settled in the settling area of the water collecting tank, the electromagnet in the settling area can effectively remove fine scrap iron in the solution, and purified water can be recycled, so that water resources are recycled.

The utility model discloses a preparation device of glucose stevioside, and relates to the technical field of glucose stevioside production, an inlet of a conversion tank is respectively communicated with a raw material tank, an auxiliary material tank and a cyclodextrin glucoside transferase tank, an outlet of the conversion tank is communicated with a hydrolysis tank, an outlet of the hydrolysis tank is communicated with a reaction tank, and the reaction tank is communicated with a reaction tank. The inlet of the reaction tank is respectively communicated with a sucrose tank, a sucrose synthase tank, a uridine diphosphate tank, a first UGT glycosyltransferase tank, a second UGT glycosyltransferase tank and an alkali liquor tank; an outlet of the reaction tank is communicated with a first macroporous adsorption resin column, an inlet of the first macroporous adsorption resin column is communicated with a first ethanol tank, an outlet of the first macroporous adsorption resin column is communicated with a first concentration tank, and a lower outlet of the first concentration tank is communicated with a first dryer; and an outlet of the first dryer is communicated with a first glucosyl stevioside tank. And the residual substrate is converted into stevioside with relatively better taste, so that the taste and quality of the product are improved.

This invention relates to the field of carbonylation reaction catalysts, and discloses a phosphine nitrogen ligand and its preparation method, a supported catalyst and its preparation method and application, as well as a method for olefin carbonylation reaction. The structural formula of the phosphine nitrogen ligand is shown in Formula 1. The supported catalyst prepared using the phosphine nitrogen ligand structure containing Si atoms of this invention has higher catalytic efficiency and better stability, maintaining high catalytic efficiency even after multiple catalytic reactions.

The utility model discloses a secondary sorting device for solid waste recovery slurry, which belongs to the technical field of solid waste recovery and comprises a support, a shaking table with the right end inclining downwards is arranged on the support, a slurry tank is arranged below the right side of the shaking table, and a slurry outlet is formed in the right side of the slurry tank. A metal collecting box is arranged at the right end of the slurry pool, and a magnetic attraction device is arranged above the right drainage end of the shaking table. On one hand, the sorting device separates out large-particle materials in slurry, sand particles in the slurry can be further purified, the quality of recycled special sand is improved, meanwhile, ferromagnetic metal in the materials can be recycled through the magnetic attraction device, non-ferromagnetic metal such as aluminum and titanium can be recycled through the intercepting net, and therefore valuable materials in waste are fully recycled, and the economic benefit is improved. According to the scheme, the sorting device is convenient to assemble and maintain, the material sorting degree is high, and the using effect is good.

This utility model discloses a low-load liner for preventing material blockage, relating to the field of liner technology. It includes a liner body comprising an upper liner, a middle liner, and a lower liner fixed sequentially from top to bottom. The bottom of the inner wall of the upper liner has an installation groove, within which a vertically positioned limiting post is fixed. A slider is sleeved and slidably connected to the limiting post. A filter plate mounting seat is fixed to the side wall of the slider away from the limiting post. The top of the filter plate mounting seat is fixed to the filter plate body, and a column is fixed through and fixed to the top of the filter plate body. A vertical rod is fixed to the inner wall of the middle liner via a horizontal plate. The top of the vertical rod penetrates the bottom of the column and extends into a cavity at the bottom of the column. A compression spring connects the inner edge of the top of the cavity and the outer edge of the top of the vertical rod. This utility model effectively solves the material blockage problem of traditional liners under low-load conditions, helping to improve the performance of related material conveying and processing equipment and reduce production and operating costs.

This invention provides a waste steam recycling device for oil processing, relating to the field of oil processing technology. It includes a processing component with a waste heat recycling component and a condensation recycling component connected to its side. The processing component includes a softening pot, one end of which is connected to a tail steam discharge pipe, and the other end to a steam inlet pipe. By opening the valve on the first conveying pipe, this invention facilitates the transport of tail steam to the interior of the heating tank, enabling preheating of the material inside the pre-softening pot and facilitating the reuse of thermal energy. Preheating the material inside the pre-softening pot reduces steam costs. Finally, the tail steam is transported to subsequent processing equipment via a connecting pipe, preventing direct emission into the air and reducing air pollution. The insulation shell provides insulation for the heat inside the heating tank.

This application relates to the field of condensate collection and reuse, and in particular to a condensate collection and reuse device, comprising a condensate collection system for receiving steam from the steam outlet of a dyeing and drying equipment and condensing the received steam to form condensate; a multi-stage recovery tank, including a primary recovery tank, a secondary recovery tank, and a tertiary recovery tank connected in sequence, with the output end of the condensate collection system connected to the primary recovery tank; a storage tank for storing the condensate; and a pumping mechanism for pumping the condensate from the tertiary recovery tank to the storage tank. This application has the effect of reducing water waste and environmental pollution.

The utility model discloses a treatment device for high sulfate radical wastewater, and relates to the technical field of wastewater treatment. The device comprises a filter tank and an evaporation tank, a separation assembly is arranged in the evaporation tank, and a recovery assembly is further arranged in the filter tank; the partition assembly comprises a plurality of partition plates fixedly connected into the evaporation pond at equal intervals, and a water inlet pipe penetrates through the center of the surface of each partition plate. According to the utility model, the internal space of the evaporation pond is divided into a plurality of layers through the partition plates, and high sulfate radical wastewater is uniformly distributed in each layer of space through the water inlet pipe and the water outlet shell to be evaporated and crystallized, so that the liquid level height of the wastewater is reduced, the evaporation rate of the wastewater is increased, and the problem that the existing evaporation rate is slow is solved; meanwhile, tail gas of the evaporation pond is guided into the recovery pipe through the flow converging device, the tail gas is guided into the filtering pond through the recovery pipe, waste heat is used for preheating the high-sulfate-radical wastewater, and the problem that existing waste heat is not convenient to recover is solved.

The invention discloses a carbon dioxide fracturing flowback carbon emission monitoring device and monitoring method, and relates to the technical field of reservoir transformation clean production in the oil and gas industry, the monitoring device comprises a three-phase separator, a gas detection pretreatment module, a gas detection pool, a flow control valve and a data analyzer; the three-phase separator, the gas detection pretreatment module and the gas detection pool are sequentially connected through a pipeline; and the gas detection pool is respectively connected with a flow control valve and a data analyzer. Carbon emission of carbon dioxide fracturing flow-back is monitored, and the real-time carbon emission concentration in the fracturing liquid drainage process, the real-time carbon emission in the fracturing liquid drainage process, the accumulated carbon emission in each stage, the carbon emission in the whole process and a carbon emission distribution rule curve in the fracturing liquid drainage process are obtained through calculation. Therefore, the distribution rule of carbon emission in the flow-back process of the carbon dioxide fracturing site can be mastered in time, and a more reasonable and efficient carbon dioxide trapping and liquefying process can be designed.

The invention discloses a livestock breeding disinfection and sterilization integrated device and method, and belongs to the technical field of livestock breeding disinfection and sterilizer.The device comprises a movable base, a wind-light sterilization base is arranged on the movable base, and an electro-catalysis generation mechanism used for generating disinfectant is arranged on the wind-light sterilization base; the electro-catalysis generating mechanism is connected with a 360-degree global atomization disinfecting and killing mechanism used for disinfecting the livestock breeding environment through a high-pressure atomization conveying mechanism, the wind-light sterilization base is connected with an atomized liquid circulating and collecting hopper through a protective lifting cover, and the 360-degree global atomization disinfecting and killing mechanism comprises a lifting rotating frame located in the center of the atomized liquid circulating and collecting hopper; a lifting rotating central column is arranged in the center of the lifting rotating frame and is connected with the wind-light sterilizing seat through a wind-light sterilizing structure. The problems that an existing device cannot achieve 360-degree global disinfection, manual disinfectant preparation is troublesome, synchronous lifting and rotating cannot be achieved, disinfectant cannot be recycled, and air collaborative purification is lacked can be solved.

The utility model relates to the technical field of boilers, in particular to a fully premixed combustion boiler discharge system which comprises a boiler body, an upper boiler barrel is installed on the upper portion in the boiler body, a lower boiler barrel is installed on the lower portion in the boiler body, one side of the upper boiler barrel is connected with an upper collecting box, and one side of the lower boiler barrel is connected with a lower collecting box. A plurality of convection banks are connected between the upper boiler barrel and the lower boiler barrel, a burner is mounted at one end of the boiler body, a connecting flue is mounted at the other end of the boiler body, an energy saver is connected to the outer end of the connecting flue, and a condenser is connected to the outer end of the energy saver. In the discharge system of the fully premixed combustion boiler, by adopting a fully premixed combustion technology, fuel and air are fully mixed before combustion to form a uniform combustible mixture, so that the combustion process is more sufficient and stable, and the combustion efficiency is remarkably improved. The energy saver and the condenser in the system effectively recover heat energy in the flue gas and convert the heat energy into available energy, so that the energy waste is reduced, and the overall energy consumption of the boiler is reduced.

The utility model discloses a ball pushing system for pipeline inner wall cleaning and belongs to the technical field of pipeline cleaning. Comprising a push ball storage tank used for storing small cleaning balls; the air inlet valve I is used for providing positive pressure to push the cleaning ball to move along the main conveying pipeline; the first pneumatic ball valve is used for adjusting the initial pressure of the push ball; the first pressure sensor is used for monitoring the pressure of the system; the second pneumatic ball valve is used for blocking reverse conveying of the slurry when the slurry is fed; the third pneumatic ball valve is used for cutting off the slurry conveying channel; the three-way ball valve is used for isolating the slurry during solvent circulation and isolating the solvent during slurry feeding; the diaphragm pump is used for extracting the solvent from the solvent storage tank and starting solvent circulation; the solvent storage tank is used for storing a solvent; and the discharge valve is used for accurately regulating and controlling the discharge speed and flow of the small cleaning balls. According to the utility model, the jamming effect is avoided, the ball pushing resistance is reduced, and the vicious circle blockage problem is solved; jet flow impact generated by instantaneous release of compressed gas is eliminated, and the safety of an equipment sealing structure is guaranteed.

The invention belongs to the technical field of waste liquid resourceful treatment, and particularly relates to a phase separation and recovery device for polyacrylonitrile spinning dimethyl sulfoxide-containing waste water. Comprising a transpiration multi-section type combined pipeline which comprises a continuous S-shaped flow channel formed by alternately connecting vertical sections and horizontal sections; a heat supply system; and each condensation recovery device is connected with the corresponding horizontal section. By adopting the S-shaped transpiration multi-section combined pipeline, transpiration, separation and condensation are integrated, the space utilization rate is high, and the process is continuous. A pneumatic device is arranged in the pipeline, so that gas flow conveying in a specific direction is realized, and the conveying flow of a gas-fog mixture can be adjusted; through the multi-stage gradient heating combination including external heating and inert gas mixing heating, the heating efficiency is high, and the phase separation process can be more accurately controlled; the design of a condensation recovery device is matched, so that the separation efficiency of DMSO and water and the product purity are effectively improved.

The utility model relates to the technical field of distillation gas condensation, in particular to an efficient condensing device for a perfluoropolyether distillation process. Comprising a condensation box body, a gas inlet pipe is installed at one end of the condensation box body, a liquid outlet pipe is installed at the other end of the condensation box body, and a gas return assembly used for recycling uncondensed gas is installed on the liquid outlet pipe; due to the arrangement of the gas return assembly, when distillation steam is not completely condensed in the condensation assembly, uncondensed gas can flow back to the gas inlet pipe from the liquid outlet pipe through the gas return pipe, and recycling of the uncondensed gas is achieved. Raw material loss caused by direct emission of uncondensed gas is avoided, and the production cost is effectively reduced; meanwhile, pollution possibly caused by emission of uncondensed gas to the environment is reduced, and the environmental protection requirement is met.

This invention relates to a method for simultaneously extracting lithium and removing fluoride from waste electrolyte of retired lithium batteries. The method includes: placing the waste electrolyte in an electrolysis device, using copper or a copper alloy as the cathode and graphite or copper as the anode for electrolysis; during electrolysis, Li... + Lithium metal is deposited at the cathode by reduction, PF6 ‑ The lithium metal is converted into a fluorine-containing solid compound through anodic oxidation; after electrolysis, the lithium metal and the fluorine-containing compound are separated to obtain an electrolyte in which lithium and fluorine have been removed. This method efficiently and simultaneously recovers lithium resources and removes fluorine contamination.

The utility model relates to the technical field of building waste treatment, and provides a building waste separating device which comprises a transversely-distributed long-strip-shaped bottom support, a transversely-distributed vibration feeding plate is installed on the bottom support, and a metal adsorption mechanism is arranged on the bottom support and over the vibration feeding plate. The metal adsorption mechanism comprises side fixing plates symmetrically distributed on the two sides, an adsorption belt distributed between the side fixing plates on the two sides, five tensioning driving rollers installed between the side fixing plates on the two sides and tensioning the whole adsorption belt into an inverted right trapezoid shape, and two plate-shaped electromagnets installed in the side fixing plates on the two sides. The device can quickly and accurately separate metal substances and building waste residues in the crushed building waste, improves the efficiency and quality of building waste treatment, and has important environmental protection significance and economic value.

This invention provides a condensate recovery and utilization system for a water electrolysis hydrogen production device, comprising a hydrogen production device, a hydrogen purification device, a first water collection tank, a second water collection tank, and a raw material water tank. The first water collection tank is equipped with a pure water inlet, a drain outlet, a first exhaust pipe, a second exhaust pipe, and a self-regulating valve connecting to nitrogen. The first water collection tank also contains a level gauge, a first level transmitter, a pressure gauge, and a pressure transmitter. The drain outlet of the first water collection tank is connected to the second water collection tank via a drain pipe equipped with a first pneumatic valve. The first level transmitter is electrically connected to the first pneumatic valve. This invention, through the sequential connection of the first water collection tank, the second water collection tank, the centrifugal pump, and the raw material water tank, achieves condensate recovery and recycling, reducing production costs and environmental pollution. Furthermore, it allows for real-time control of the pressure and level within the first water collection tank within a suitable range, ensuring safe hydrogen emission and significantly improving system operational safety.

The utility model relates to citrus cultivation technical field, and disclose a citrus cultivation device convenient to quick irrigation, including planting bucket, the outer surface of planting bucket is sleeved and has the hoop, the upper surface of hoop is fixedly connected with two flat bars, the lower surface of two flat bars is connected with the inclined brace through bolt, the bottom of inclined brace is connected with the water receiving tray through bolt, the top of water receiving tray is connected with the filter screen through screw, and the both ends of flat bar are inserted with the stand, and the bottom of stand is fixedly connected with the base. The utility model discloses through starting water pump can quickly draw water tank water source, and by multiple spray heads to citrus seedling irrigation through water delivery pipe, inclined pipe, with the help of water pump power and multi -spray head design, efficient irrigation is completed, at the same time, the water receiving tray collects the redundant moisture of planting bucket seepage, and the backflow is realized to water tank through the downspout, realizes water resource recycling, reduces waste.

The utility model provides a fructose production wastewater recovery device, and belongs to the technical field of chemical wastewater treatment. A ceramic membrane ultrafiltration system comprising a bag filter and a ceramic membrane ultrafiltration device is arranged for preliminary filtration, and the ceramic membrane ultrafiltration system can remove most impurities in liquefied condensate water and vacuum pump drainage water in the fructose production process to obtain a clear water sample; further filtration is carried out in a reverse osmosis system comprising a precision filter and a reverse osmosis device, the reverse osmosis system can remove residual impurities and pollutants in the wastewater to obtain recycled water meeting the requirements of ion exchange reclaimed water for fructose production, and finally, the recycled water enters an osmosis water production tank to be stored; the product is used for next fructose production; the ceramic membrane ultrafiltration system and the reverse osmosis system are arranged in a matched manner, so that the contents of acetaldehyde, impurities and COD (Chemical Oxygen Demand) in the wastewater can be effectively reduced, and the recycled water meets the requirements of ion exchange recycled water for fructose production.

This utility model belongs to the field of spindle cleaning technology, and specifically relates to a cleaning device and PCB processing equipment. The cleaning device includes a housing and a cleaning component. The housing has a cavity, and the cleaning component is disposed within the cavity. A return port is provided on one side of the housing, communicating with the cavity. The cleaning component has a spray channel and a recovery channel. The first end of the spray channel is connected to a liquid supply device, and the second end is used to spray cleaning liquid. The recovery channel communicates with the cavity and is used to allow the cleaning liquid to flow through the return port into an external recovery device. The spray channel precisely guides the cleaning liquid to the area requiring cleaning, and the recovery channel promptly collects the sprayed and falling cleaning liquid, achieving the recycling of the cleaning liquid. This ensures a continuous supply of cleaning liquid, avoiding frequent replenishment due to insufficient cleaning liquid and the need to clean up splashed cleaning liquid, thus improving cleaning efficiency.

This utility model discloses a positive pressure smelting industrial electric furnace, relating to the field of smelting equipment technology. The utility model includes a furnace body and a furnace cover. A flue gas treatment component is provided on one side of the top of the furnace cover, and a feeding component is provided on the other side of the top of the furnace cover. The flue gas treatment component includes a combustion cylinder located on one side above the furnace cover. An overflow pipe is fixedly connected to the bottom of the combustion cylinder, and the bottom end of the overflow pipe extends to the upper inner side of the furnace body. This utility model introduces carbon monoxide from the furnace body into the combustion cylinder for combustion through the overflow pipe on the combustion cylinder. The heat generated by the combustion is used to heat the water in the sleeve through heat exchange fins, solving the problem of difficulty in recovering and reusing the waste heat generated by carbon monoxide combustion in existing systems. Simultaneously, the threaded rod in the mounting frame drives the collar and the feeding pipe to rise and fall, ensuring that the discharge end of the feeding pipe is always above the molten pool inside the furnace body, solving the problem of difficulty in preventing some powder from clogging the furnace flue during the feeding process.

The invention discloses a method for catalyzing ring-opening repolymerization of a cyclic dimer in a nylon 6 extractable oligomer under mild conditions, which comprises the following steps: mixing cyclic dimer powder with a sulfonic acid catalyst and water to obtain a mixture; heating the mixture to a first reaction temperature, and reacting in an inert gas atmosphere; carrying out vacuum drying on the reacted product; adding water, heating to a second reaction temperature, and carrying out prepolymerization reaction in an inert gas atmosphere; and after the prepolymerization is completed, cooling to a third reaction temperature, and devolatilizing under a vacuum condition to obtain the high molecular weight regenerated nylon 6. By means of the sulfonic acid catalyst, ring opening of the cyclic dimer can be effectively achieved at the low temperature, the use amount of the catalyst is effectively reduced, and the corrosion degree to equipment is relieved. The ring-opening product can be subjected to polymerization reaction to recycle the extractable oligomer of the nylon 6, and the total content of the extractable oligomer in the regenerated nylon 6 slice is effectively controlled.