1360 results about "Liquid tank" patented technology

The present application relates to a kind of heat shock flash evaporation loop lift membrane heat exchange test system, including heat exchange pipe, vapor-liquid separator, condenser, metering barrel, vacuum pump, liquid tank, heat shock heater, throttle valve, measurement and control system and high-speed camera, the upper outlet of heat exchange pipe is connected with the import of vapor-liquid separator, the secondary steam outlet of vapor-liquid separator is connected with the hot medium side import of condenser, the hot medium side outlet of condenser is connected with metering barrel and liquid tank respectively, the concentrated liquid outlet of vapor-liquid separator is connected with liquid tank, the outlet of metering barrel is connected with liquid tank, vacuum pump is connected with liquid tank, liquid tank is connected with heat shock heater, heat shock heater is connected with heat exchange pipe, throttle valve is arranged between heat shock heater and heat exchange pipe;High-speed camera is arranged in one side of heat exchange pipe.The present application can realize the experimental test to heat shock flash evaporation loop lift membrane heat exchange technology, and provide support for mechanism research, equipment optimization of heat shock flash evaporation loop lift membrane heat exchange technology.

The invention discloses a circulation system of aluminum wire drawing liquid, and relates to the technical field of metal processing, the circulation system comprises: a wire drawing device, which is provided with an immersion liquid box and an outlet die, and after entering the immersion liquid box for drawing, an aluminum rod is sized from the outlet die for molding; a filter is arranged in the wire drawing liquid pool, the filter is communicated with the immersion liquid box through a circulating pipe I, the circulating pipe I is connected with a heat exchanger, and the immersion liquid box is communicated with the wire drawing liquid pool through a return pipe; the cooling system is connected with the heat exchanger through a circulating pipe II; the filter is provided with at least one continuous filtering mechanism, and the continuous filtering mechanism is configured to trigger the continuous filtering mechanism to rotate to switch a new filtering structure when the water level in the filter rises. After the water-based aluminum wire drawing liquid is adopted, no smell is generated in the circulation process, and the surrounding environment of a machine table is clean and tidy. Meanwhile, after the aluminum powder is filtered and is drawn by a nano-mold, the lubricating property is good, and the surface of the aluminum wire is smooth and clean.

The invention relates to a waste liquid treatment device for automatically separating radionuclides. The waste liquid treatment device comprises a first waste liquid collection passage and a second waste liquid collection passage, an upstream liquid supply channel shared by the two channels comprises an injection pump and a multi-way valve, and the injection pump inputs liquid into the multi-way valve. The first waste liquid collecting channel directly guides cleaning liquid, replacement liquid and the like which do not need to be reserved into a waste liquid barrel through a first output port of the multi-way valve. The second waste liquid collecting channel is sequentially connected with a plurality of resin columns, a waste liquid tank, a peristaltic pump and a waste liquid barrel through a second output port of the multi-way valve, waste liquid generated by the resin columns firstly enters the waste liquid tank for temporary storage, and when the liquid level of the waste liquid tank reaches a preset threshold value, the peristaltic pump automatically pumps and discharges the waste liquid into the waste liquid barrel for centralized collection. The device can distinguish reserved liquid from waste liquid according to steps, realizes automatic flow division, temporary storage and discharge of the waste liquid, avoids manual pouring of the waste liquid halfway, ensures continuous operation of a long-time and multi-channel separation process, and reduces the risk of personnel exposure in a radioactive waste liquid treatment process.

The utility model relates to a pomacea canaliculata trapper which comprises a trapping mechanism, a liquid medicine barrel is arranged below the trapping mechanism, a photovoltaic panel is installed on the top of the trapping mechanism, the trapping mechanism comprises a bottom plate and a lower frame, a plurality of vertical rods are connected between the bottom plate and the lower frame, and an action control circuit and a photovoltaic power source controller are installed on the surface of the bottom plate. A gear transmission mechanism is installed below the bottom plate and comprises a plurality of gears, an output shaft of each gear is rotationally connected with a rotating blade, the rotating blades are located above the lower frame, a screw is further arranged between the bottom plate and the lower frame and connected with a spiral sweeping disc, one end of the spiral sweeping disc is in sliding connection with the vertical rod, and the other end of the spiral sweeping disc is in sliding connection with the vertical rod. And the screw rod and the sweeping disc are positioned in an area enclosed by the plurality of rotating blades. According to the habit that the ampullaria gigas climbs to the side wall of a hard object on the water surface or the surface of an emergent aquatic plant to lay eggs before nighttime to dawn, mechanical equipment is combined, female ampullaria gigas before egg laying is efficiently caught and killed through a physical means, the population number of the ampullaria gigas is greatly controlled, and the device is environmentally friendly and low in input manpower and cost.

A reservoir tank assembly and a heat pump system including the same are disclosed. The reservoir tank assembly may include a reservoir tank configured to remove air contained in a coolant and an adapter fluidly connecting the reservoir tank and a coolant line along which the coolant flows. A part of the coolant flowing along the coolant line is introduced into any one degassing chamber among a plurality of degassing chambers through the adapter. The coolant passing through the plurality of degassing chambers is discharged to the coolant line through the adapter.

The invention discloses a Fluent-based numerical simulation and experimental design method for shaking of liquid in a tank of a tank truck, and belongs to the technical field of numerical simulation of fluid dynamics (CFD). The method includes the steps that the hole opening position of the wave-proof plate serves as an independent variable, multiple hole opening position schemes are designed, liquid shaking related indexes are determined to serve as dependent variables, a geometric model is established according to the actual structure of a tank truck tank body, a fluid mechanics model and boundary conditions are set, a solver is configured, output parameters and numerical simulation initial values are set, and an experiment is executed. The liquid shaking process of a certain swash plate trepanning scheme is simulated, acting force data, namely shaking index data, between liquid shaking and the inner wall of the tank body is recorded, the advantages and disadvantages of each trepanning position scheme are evaluated based on the shaking index data, and the optimal scheme is determined. According to the method, a real object experiment is replaced by CFD numerical simulation, parameter setting is carried out, the experiment cost and the experiment risk are remarkably reduced, the experiment efficiency is improved, and data support can be provided for industry design.

A dual-liquid vibration damping sloshing chamber for wind turbine towers, oriented towards source-grid-load-storage synergy, belongs to the technical field of wind turbine vibration damping equipment. It is a sloshing damping structure externally mounted on the wind turbine body, including a wind vane, a sloshing chamber structure consisting of an annular sloshing chamber, liquid baffles, upper liquid, and lower liquid, and a turntable fixing structure consisting of a rotor and rotor flange. The annular sloshing chamber has a central through hole, is fitted onto the tower, contains liquid baffles, and is filled with two immiscible liquids with different densities. The wind vane is arranged outside the annular sloshing chamber. The sloshing damping structure is fixed to a fixed section of the wind turbine tower via the rotor flange. This invention improves the vibration damping effect of the sloshing damping structure by replacing a single sloshing liquid with a stable, layered, immiscible dual liquid, accurately adapting to all operating conditions. Through the linkage of the wind vane and liquid baffles, the vibration damping efficiency of the sloshing damping structure is improved, the generation of resonance effects is suppressed, and the stability of the vibration damping effect of the sloshing damping structure is enhanced.

The invention discloses a phased array, TOFD and magnetic powder integrated detection system and method for medium and large diameter pipeline welded joints, the detection system comprises a control system, a liquid storage and supply system and a scanning system, the control system is connected with the liquid storage and supply system, the control system is connected with the scanning system, and the scanning system is connected with the control system. The liquid storage and supply system is connected with the scanning system through a flexible water pipeline and a flexible magnetic suspension pipeline; the liquid storage and supply system comprises a magnetic suspension tank and a water tank which are respectively used for storing magnetic suspension and water; the scanning system is a data acquisition center, is provided with a phased array probe, a TOFD probe, an electromagnetic yoke and a video sensor in a centralized mode, operates in a sub-control mode, is driven by a magnetic attraction wheel driving mechanism to achieve automatic scanning of a welding joint, and transmits detection data information to the control system. The device is compact in structure, convenient for later maintenance and low in manufacturing cost; according to the invention, the parameter control is accurate, the detection data can be analyzed in real time, the data interpretation is convenient, the detection precision is high, the detection speed is fast, and safety and reliability are realized.

The invention discloses a simulation driving control method and system for cleaning equipment, and belongs to the technical field of equipment control. The method comprises the steps that sensor arrays are arranged at the water inlet end, the middle bending position and the water outlet end of the cleaning equipment respectively; a three-dimensional detection network is constructed to obtain spatial distribution data of the hollow target equipment to be cleaned in real time and transmit the spatial distribution data to the PLC; the PLC controller generates a stain load three-dimensional simulation map through fusion algorithm processing, calls a neural network model matching feature database to identify main stain types, and then performs linkage execution control; in the cleaning process, the cleanliness degree is judged according to the turbidity and pollutant content detected by a sensor at the water outlet end, and cleaning liquid is controlled to be recycled to a circulating water tank or discharged into a waste liquid tank; intelligent control over the cleaning process is achieved, the cleaning efficiency and cleanliness are improved, and cleaning fluid consumption is reduced.

The utility model provides a multifunctional hoisting cleaning device which is characterized in that a framework supports a platform, an acid liquor tank, an alkali liquor tank, a clear water tank and a buffer tank are mounted on a base, a tank body is mounted in the framework platform, and a top cover is arranged on the tank body; a spraying pipeline and a gas washing pipe are mounted on the inner surface of the tank body, a lifting pump and a filter are connected to the inlet end of the spraying pipeline, a rotary spray head is arranged on the spraying pipeline, a limiting frame is mounted in the tank body and arranged on the outer side of the spraying pipeline, a hoisting workpiece frame is hoisted and placed in the limiting frame, and a cleaning workpiece is placed in the hoisting workpiece frame; the spraying pipeline comprises a bottom surface spraying pipeline, a vertical surface spraying pipeline and a top surface spraying pipeline which are communicated with one another, an acid liquor tank, an alkali liquor tank, a clear water tank, a buffer tank and a gas washing pipe are respectively connected into the cleaning spraying pipeline through quick connectors, acid washing, alkali washing, clear water washing and gas washing treatment are carried out on the surface of a large workpiece, multifunctional cleaning is integrated, the workpiece is convenient to hoist, manpower and material resources are saved, and the working efficiency is improved. And different types of cleaning can be completed without repeated carrying.

The utility model relates to the field of medicine inspection, and discloses a medicine inspection liquid preparation device which comprises an operation table, a liquid preparation tank is fixedly connected to the surface of the operation table, a first motor is fixedly connected to the bottom of the operation table, a rotating rod is fixedly connected to the output end of the first motor, and stirring blades are fixedly connected to the outer wall of the rotating rod. An air cylinder is fixedly connected to the surface of the operation table, a top cover is fixedly connected to the output end of the air cylinder, a limiting rod is fixedly connected to the top of the top cover, a water collecting ring is arranged in the top cover, and a high-pressure spray head is fixedly connected to the surface of the water collecting ring. According to the proportioning tank, the motor I, the rotating rod, the stirring blades and other structures are arranged, so that the situation that sticky liquid medicine adheres to the proportioning tank to affect the follow-up proportioning precision is avoided, a large amount of cleaning solvent does not need to be consumed in the cleaning process, and meanwhile, when cleaning is needed, the tank opening of the proportioning tank is closed to prevent the liquid medicine from polluting the environment due to water splashing.

The invention discloses a device and method for preparing special isocyanate, the device comprises a synthesis device and a separation device, the synthesis device comprises a batching tank, a synthesis reaction kettle, a discharge filter, a discharge circulating pump, a sampler, a flash tank and a crude product conveying pump which are communicated in sequence, and an axial-flow stirrer and a parabolic stirrer are arranged in the synthesis reaction kettle; a catalyst basket is detachably and vertically fixed on the inner side wall of the synthesis reaction kettle; the separation device comprises a negative pressure separation tower, a tower top cooler, a gas-liquid bag, a condensate collecting tank and a tower top reflux pump which are sequentially communicated, and is also provided with a vacuum pump, a tower kettle circulating pump and a product conveying pipeline. The device and the preparation method have the beneficial effects of high synthesis reaction speed, simple and controllable production process, good crude product separation effect and low equipment energy consumption.

The utility model discloses a hydraulic support roof-contacting device, belongs to the technical field of coal mining equipment, and solves the problem that support top beams of hydraulic supports are not compactly contacted with the roof due to unevenness of roadway roofs. Comprising a closed high-pressure liquid tank, the lower portion of the high-pressure liquid tank is detachably connected with a support top beam of a hydraulic support, a plurality of floating type roof-contacting mechanisms are arranged on the upper portion of the high-pressure liquid tank, driving parts of the floating type roof-contacting mechanisms are located in the high-pressure liquid tank, and roof-contacting parts of the floating type roof-contacting mechanisms are located above the top of the high-pressure liquid tank. And a high-pressure liquid medium with a constant volume is arranged in a liquid cavity of the high-pressure liquid tank. The hydraulic support is reasonable in design, compact in structure and capable of automatically adjusting the telescopic length of a plurality of floating type roof contact mechanisms according to the actual shape of the roadway roof so as to be tightly attached to the uneven and undulating roadway roof, and the supporting effect and the use safety of the hydraulic support are effectively improved.

The utility model discloses a kind of polysulfone granular material washing devices, relate to polysulfone production equipment technical field.Polysulfone granular material washing device, including washing kettle, heat preservation device and washing liquid circulating device, the upper portion of washing kettle is provided with feed inlet, top is provided with eluent outlet, bottom is provided with washing liquid inlet, the lower portion in washing kettle is provided with first perforated plate, upper portion is provided with second perforated plate, second perforated plate can be moved back and forth along the axial direction of washing kettle;Heat preservation device is set on washing kettle;Washing liquid circulating device includes the cooler, solid-liquid separator, washing liquid tank, circulating pump and heater connected in sequence.The technical scheme of the utility model adopts the mode of ethanol countercurrent circulation flow to wash polysulfone granular material in washing kettle, and when washing, limit the polysulfone granular material to be washed between first perforated plate and second perforated plate, can more fully elute diphenyl sulfone on polysulfone granular material, guarantee the washing effect.

The present disclosure relates to a system (10) including a transformer (12) including a tank (14) configured to receive a liquid (20). The system (10) further includes an overflow device (22) and a connection device (24) configured to fluidly connect the tank (14) and the overflow device (22). The overflow device (22) includes an elastically deformable flexible member (26). The overflow device (22) is configured, under deformation of the flexible member (26), to periodically receive a portion of the liquid (20) from the tank (14) and return at least a portion of the received liquid to the tank (14) through the connection device. The system (10) further includes a heat transfer device (42) configured to provide a flow (44) of a cooling medium (46) in at least a portion of the overflow device (22) and / or the connection device. The present disclosure also relates to additional systems.

The utility model discloses a waste gas treatment machine for welding waste gas purification, which comprises a liquid tank and a valve body, the top end of the liquid tank is provided with the valve body, the side wall of the valve body is provided with a support arm, the outer wall of the valve body is provided with two groups of exhaust pipes, the side wall of the support arm is movably provided with an electric push rod, and the electric push rod is movably provided with an exhaust pipe. A push arm is installed at the output end of the electric push rod, a linkage arm is movably installed at the end, away from the electric push rod, of the push arm, a driving shaft is fixedly installed at the end, close to the valve body, of the linkage arm, the driving shaft extends into the valve body and is movably connected with the valve body, and a flow dividing block is arranged in the valve body. And the driving shaft is connected with a flow dividing block, and two sets of exhaust channels are formed in the flow dividing block. According to the utility model, the exhaust gas is conveniently filtered and treated through two channels, the situation that the processor is shut down when the filter block is replaced is avoided, and the efficiency and the quality of exhaust gas treatment are improved.

The petroleum drilling system comprises a base, the base is horizontally placed on the ground, a through hole is formed in the middle of the base, a transverse plate is arranged above the base in a lifting mode, a first motor is arranged above the transverse plate, and an outer pipe is arranged below the transverse plate; the top of the outer pipe is connected with an output shaft of the first motor pair, a drill bit is arranged at the bottom of the outer pipe, and a hole channel is formed in the drill bit in a penetrating mode and communicates with the outer pipe. An inner pipe is arranged on the inner side of the outer pipe, a plurality of adjusting assemblies are arranged below the inner pipe, each adjusting assembly is connected with the inner side wall of the outer pipe, and the size of an opening in the upper end of a space formed by the adjusting assemblies is larger than that of an opening in the lower end of the space. A water pump and a liquid tank are further arranged on the base; the water pump can control the liquid tank to enable drilling fluid to enter and exit from the inner pipe and the outer pipe; by replacing the manufacturing material of the inner pipe, the overall mass of the inner pipe is lighter, and then the fixing degree of the plug pin to the inner pipe is improved.

The application discloses an atomizer and an atomizing device, comprising a housing assembly, an atomizing assembly, a gating member and a blocking member. The housing assembly comprises a first liquid tank, a second liquid tank and a liquid guide hole connecting the first liquid tank and the second liquid tank, and the first liquid tank is used for storing an atomizing substrate. The atomizing assembly is arranged in the second liquid tank and is used for atomizing the atomizing substrate into aerosol. The gating member is arranged in the housing assembly, and the blocking member abuts and seals the liquid guide hole. The gating member is configured to move the blocking member to expose the liquid guide hole and form a liquid path connecting the first liquid tank and the second liquid tank in response to an electrical signal generated by user suction. The gating member is located outside the liquid path, and the blocking member is located in the liquid path. When the atomizer is used, the blocking member can be moved by the gating member to open the liquid guide hole to supplement the second liquid tank. When the atomizer is not used, the blocking member can abut and seal the liquid guide hole to avoid liquid leakage.

This separator comprises: a porous resin base material; and an inorganic compound filled into the resin base material and composed of titanium and at least one element selected from the group consisting of magnesium, aluminum, and yttrium. The composition ratio of titanium to the entire inorganic compound is at least 40 atm%. When a liquid tank in which two tubes each having an inner diameter of 6 mm protrude upward, which is partitioned into two chambers by a separator having a diameter of 26 mm, and which is filled with a 6M KOH aqueous solution is used as a measurement device, the liquid permeation amount measured 168 hours after the liquid level difference of the tubes is set to 70 cm is at least 0.05 mL and at most 5 mL.

The application provides a forestry insect expelling device, which comprises a main box body and a sub-box body, a moth attracting lamp and an electric net are fixedly installed at the bottom end of the cover plate of the main box body, a plurality of nozzles obliquely facing the electric net are fixedly installed at the bottom end of the cover plate, a charged cleaning liquid tank and a control tank are arranged in the sub-box body, a ring-shaped pipe is connected to the output end of a pump body in the charged cleaning liquid tank, the ring-shaped pipe is communicated with the nozzles, a moth attracting agent box is fixedly connected to the bottom end of the electric net, a moth attracting agent strip is installed in the moth attracting agent box, a protective net is arranged at the bottom end of the moth attracting agent box, a motor is fixedly installed at the bottom end of the main box body, the output end of the motor is drivingly connected with a first scraper plate in contact with the inner wall of the main box body, a second scraper plate in contact with the bottom end of the protective net and a brush plate perpendicular to the second scraper plate, the brush plate is fixedly provided with bristles in contact with the electric net, ventilation openings are arranged at the two sides of the main box body close to the top end, and a controller arranged in the control tank remotely controls each power unit through a wireless transceiver. The application can realize efficient insect expelling and killing, and is convenient to manage.

A waste liquid treatment system comprises a liquid storage tank, a combustor and a combustion furnace, a liquid outlet pipe is arranged at the bottom of the liquid storage tank, a liquid outlet hand valve is arranged on the liquid outlet pipe, the liquid outlet pipe is communicated with a waste liquid pump inlet in the combustor through a liquid outlet quick connector and a pipeline, a backflow pipe is arranged on the upper portion of the liquid storage tank, and a backflow hand valve is arranged on the backflow pipe. The backflow pipe is communicated with an outlet of a waste liquid pump in the combustor through a backflow quick connector and a pipeline, a storage tank cover is arranged at the top of the liquid storage tank, an outlet of the combustor is communicated with the combustion furnace through a combustion quick connector, and a cooling air inlet is formed in the bottom of the combustion furnace. The liquid storage tank and the combustor as well as the combustor and the combustion furnace are connected through the quick connectors with high precision, the reliability of connection is guaranteed, disassembly and movement are convenient, the hearth is vertically arranged, and compared with a traditional combustion furnace which is horizontally arranged in a large size, the combustion effect is better, and meanwhile movement is convenient.

The invention discloses an automatic flushing device for a hemoperfusion device, and relates to the technical field of medical instruments. Comprising a base and a flushing structure, a vertical frame is arranged at the top of the base, and a flushing fluid box is arranged on one side of the vertical frame; the vertical frame is further provided with a lifting structure and a lifting table, and the lifting table is installed on the lifting structure. A back plate is arranged at the top of the lifting table; the flushing structure is mounted on the side surface of the back plate; a pump machine is arranged in the flushing fluid tank, a fixing pipe is arranged at the output end of the pump machine, penetrates through the top of the flushing fluid tank and is provided with a connecting port, the connecting port is provided with a flushing fluid feeding pipe, and the other end of the flushing fluid feeding pipe is connected with the flushing structure; the top of the base is further provided with a waste water barrel, and the flushing structure is further provided with a waste liquid collecting pipe. The device is compact and reasonable in overall structure and easy to operate and understand, the workload of medical staff can be remarkably relieved, the medical resource utilization efficiency is improved, and the device has important clinical application value and popularization prospects.

An atomization assembly includes a housing assembly and a heating element. The housing assembly is formed with an e-liquid tank and an atomization tank spaced apart from each other. The housing assembly is further formed with an air inlet channel and a vent channel. The air inlet channel is in communication with the atomization tank. The vent channel is in communication with the e-liquid tank. The atomization tank is isolated from the vent channel. The housing assembly includes an air channel wall forming the vent channel. The air channel wall is at least partially located in the atomization tank.

The utility model discloses a kind of liquid nitrogen storage tank pressure relief protection devices based on liquid column differential pressure control, belong to pressure vessel testing equipment field. Including liquid tank, air inlet and exhaust pipe and connecting pipe. Middle in liquid tank is provided with baffle, the baffle will the internal space of the liquid tank be divided into gas chamber and liquid chamber, liquid level control hole is opened on the side wall of the baffle far from the liquid chamber, the liquid level control hole of uppermost layer is located below the top edge of the baffle;The air inlet and exhaust pipe is vertically inserted in the top of the liquid tank, and the bottom end of the air inlet and exhaust pipe extends to below in the liquid chamber, the bottom end face of the air inlet and exhaust pipe is located below the liquid level control hole;The connecting pipe is vertically inserted in the bottom of the liquid tank, and the top end of the connecting pipe extends to in the gas chamber. The utility model is discharged by liquid column static pressure difference The pressure relief device of two-way protection of overpressure / negative pressure, especially applicable to the pressure test working condition of liquid nitrogen storage tank.

This utility model discloses a solid-liquid separation diatomaceous earth filtration system, relating to the field of filtration technology. It includes: a coating tank for storing a liquid mixed with diatomaceous earth, a coating circulation pipeline, and a raw liquid tank, a delivery pump, a filter cartridge, and a purified liquid tank connected in sequence. The filter cartridge is vertically arranged inside the cartridge. A drain port and a liquid inlet pipeline are provided at the bottom of the cartridge, and an outlet pipeline and a cleaning pipeline, both connected to the filter cartridge, are provided at the top. A drain valve is provided at the drain port. The top of the inner cavity of the cartridge is connected to a first air supply pipeline, and the bottom of the inner cavity is connected to a pressure return pipeline. The bottom of the coating tank is connected to the liquid inlet channel of the cartridge via a circulation pump. One end of the coating circulation pipeline is located inside the coating tank, and the other end is connected to the filter cartridge. In this utility model, the filter cartridge is coated with soil using the coating tank. Gas supplied through the first air supply pipeline forces the raw liquid inside the cartridge into the pressure return pipeline, saving raw liquid resources and improving the regeneration effect of the filter cartridge.

The utility model discloses a soil pollution abatement and remediation device which comprises a frame body, a transversely-arranged supporting plate is arranged at the bottom end of the frame body, moving wheels used for moving are arranged at the bottom of one end of the frame body, a liquid storage tank connected with the frame body is arranged above the supporting plate, a liquid inlet hopper is arranged at the top of the liquid storage tank, and the bottom end of the liquid storage tank is communicated with a water pump. And one end of the drainage pipe is connected with a spraying mechanism. The liquid medicine in the liquid storage tank is sprayed out through the spraying mechanism through the water pump, and soil remediation liquid spraying remediation work on soil is achieved. And one end of the circular ring can drive the adjusting plates to move in the same direction or back to back, so that the spraying angle of each spray head is adjusted, the spraying range of the repairing liquid is widened, and the repairing efficiency is improved.

This invention relates to a spraying device for defoliants on edible sunflowers and its usage method. The device includes a drone body with a liquid tank in the center. An annular plate is vertically movable along the outer wall of the drone body, and a windbreak plate is slidably connected to the side wall of the annular plate. A first spray pipe is fixedly mounted at the center of the bottom of the drone body. Second spray pipes are rotatably connected to both ends of the first spray pipe, and the other end of each second spray pipe is rotatably connected to vertical plates on both sides of the bottom of the drone body. The rotation of the second spray pipes is synchronized with the raising and lowering of the windbreak plate. Atomizing nozzles are fixedly mounted at the bottom of both the first and second spray pipes. This invention forms a vertical air curtain through the windbreak plate, providing a stable falling environment for the droplets and effectively preventing drift. The inclined spraying of the atomizing nozzles on both sides makes the liquid distribution more uniform and widens the effective coverage area, ensuring that the entire row of crops receives sufficient liquid from the center to the edge, eliminating missed spraying along the row edges, and improving the spraying effect.

The application belongs to the technical field of EVA tail gas recovery, and specifically discloses a system and method for recovering EVA production exhaust gas by means of overpressure expansion deep cooling, which comprises a cooler A, wherein an exhaust gas pipeline, a cooling water supply pipeline and a cooling water outlet pipeline are connected to the cooler A, and an exhaust gas inlet valve, a cooling water inlet valve and a cooling water outlet valve are arranged on the cooler A; a liquid separation tank A, a compressor, a cooler B, a liquid separation tank B and a regenerated gas system are connected in series on the cooler A; the cooler B is connected with a compression unit; the liquid separation tank B is connected in series with a liquid separation tank C and a VA refining system; and the liquid separation tank C is connected with the cooler B. In view of the problem that current equipment for recovering EVA production exhaust gas has high requirements, the application realizes efficient recovery of ethylene and vinyl acetate in EVA production exhaust gas by means of overpressure expansion deep cooling, and solves the problem that, in the prior art, the recovery of EVA production exhaust gas requires high equipment and has low recovery efficiency, resulting in resource waste.

The application discloses a heat dissipation shell applied to a large cylindrical battery, which comprises a shell, a support for supporting the shell is fixedly connected to the bottom of the shell, a fixing seat is fixedly connected to the bottom of the support, a heat dissipation mechanism for assisting the shell in heat absorption and heat dissipation is fixedly installed at the middle of the outer side of the shell, an inner groove is formed in the middle of the inner wall of the shell, a liquid cooling hose is embedded in the inner groove, a cold liquid tank is installed at the top of the fixing seat, a water pump is installed on one side of the bottom of the inner wall of the cold liquid tank, a sleeve is fixedly connected to the top of the shell, a sleeve rod is clamped to the sleeve, a top plate is connected to the top of the sleeve rod, an air cooling mechanism for heat dissipation in the shell is installed at the bottom of the top plate, the heat dissipation shell applied to the large cylindrical battery can realize multiple heat dissipation and cooling, accelerate heat dissipation of the battery, has a better heat dissipation effect, avoids the phenomenon of high-temperature bulging of the battery during long-term work, and effectively prolongs the service life of the battery.

The present application relates to a multi-column combined low-pressure column chromatography device and a process for purifying (S)-1-(carbamoyl)methyl-4-hydroxy-2-pyrrolidinone reaction liquid. It comprises a sample column (1), a rough separation column (2), a fine separation column (3), a target product collection tank (4), a waste mobile phase collection tank (5), a waste mobile phase regeneration system (6), a mobile phase storage tank (7), a cleaning liquid storage tank (8), a waste liquid tank (9), a pump (10), and a valve (11). The device cooperates with a specific process to significantly improve the column chromatography separation efficiency and impurity removal capacity, completely separates the impurities with similar polarity, realizes high productivity and high impurity removal capacity under the condition of severe load overload of the chromatographic column, and correspondingly reduces the use amount of the mobile phase by more than 60%. The purity of the crude product after the column can reach more than 99%, and the yield is stable at more than 85%.