93results about How to "No cooling required" patented technology

The invention relates to the field of voltage source converter based high voltage direct current (VSC-HVDC), in particular to a grounding device of a modular multi-level VSC-HVDC system and a design method of the grounding device. The grounding device is arranged at the alternating current (AC) side of a modular multi-level VSC-HVDC, is used for AC / DC component working conditions in the VSC-HVDC system and is used for meeting positive and negative voltage sharing of the DC side of the VSC-HVDC system or providing a zero-sequence current path. The grounding device comprises a grounding transformer and a grounding resistor which are connected with each other and a Z-type transformer or a star-delta transformer is adopted to serve as the grounding transformer. The design method comprises the following steps: A, determining excitation reactance parameters of the grounding transformer; B, determining parameters of the grounding resistor. The grounding device is low in loss, and meanwhile, improvements are performed on the traditional technological base of the grounding device, so that the required development is low in difficulty and is reliable, simple and convenient. The grounding device has the advantages that the occupied area is small, the manufacturing cost is low, and the operational stability is high.

The invention relates to a large-area X-ray pulse detection device based on microchannel plate split joint. The large-area X-ray pulse detection device comprises an X-ray photoelectric cathode, a first insulating layer, a microchannel plate (MCP) input electrode press ring, a second insulating layer, an MCP input electrode, a first MCP layer, an intermediate electrode, a second MCP layer, a third insulating layer, an MCP output electrode, a fourth insulating layer, and an anode which are sequentially stacked up, wherein the first MCP layer and the second MCP layer are both large-area MCP detectors, and each MCP detector comprises a detector body, a split-joint framework and a processing circuit. The large-area X-ray pulse detection device resolves the technical problems that an existing MCP detector is adopted to detect the X-ray pulse, extremely long observation time is needed, and detection efficiency of the whole system is low, a detection method and a device which are high in detection efficiency are provided for an X-ray pulsar navigation system, photon measurement information with high time resolution and high time accuracy is provided for X-ray pulsar navigation, and guarantee is provided for high precision of navigation positioning.

The invention discloses a process for co-producing synthetic natural gas and food-grade carbon dioxide by using calcium carbide furnace gas. The process sequentially comprises the steps that after purified calcium carbide furnace gas is pressurized and mixed with medium-pressure steam and then the obtained mixture enters a shift-converter to carry out shift-conversion, the obtained gas enters a methanation reactor to carry out methanation, and then enters a decarbonization system to remove CO2; the gas subjected to CO2 removal is dried, and then enters a methane concentration system to carry out concentration, thereby obtaining synthetic natural gas; and the removed CO2 is prepared into food-grade CO2 through a recovery unit. The decarbonization system can adopt a PSA (pressure swing adsorption) dry decarburization process, and also can adopt a wet decarburization process. The wet decarburization is implemented by removing CO2 by using a thermokalite method or MDEA washing. A CO2 recovery unit has the functions of CO2 collecting, purifying, and purification by flash distillation. The methane concentration can be implemented by concentrating methane by using a PSA method, and also can be implemented by concentrating methane through low-temperature separation. The process disclosed by the invention is a packaged technology for co-producing synthetic natural gas and food-grade carbon dioxide by using calcium carbide furnace gas, which is suitable for industrial scale applications.

The invention discloses a quenched steel long axis excircle and thread hard turning machining process. A numerically controlled lathe is adopted for turning machining; and a ceramic cutter or a PCBN (Polycrystalline Cubic Boron Nitride) cutter is adopted according to different hard ranges of workpieces. The excircle surface roughness of a workpiece machined by using the process can be Ra0.8mm; the cylindricity is controlled within 0.02mm; the stroke-leading precision of a thread rolling track can be up to P7; and the cylindricity is within 0.02mm. Furthermore, according to the process, a condition that once machining is performed by the lathe is needed; the rough grinding procedure in the prior art is omitted; and moreover, no cutting liquid needs to be added while machining; and the machining efficiency is greatly improved, the investment on equipment is reduced, cooling liquid is not required, and the process belongs to green cutting processes which are efficient and environmental-friendly.

The invention relates to the technical field of photoelectron, in particular to a plane-configured organic infrared or ultraviolet photovoltaic semiconductor detector which comprises a substrate, an organic infrared or ultraviolet photovoltaic semiconductor, a low work function electrode and a high work function electrode. The detector is characterized in that the low work function electrode and the high work function plane are in the same plane. The plane-configured organic infrared or ultraviolet photovoltaic semiconductor detector technology of the invention can be applied to manufacture a plane-configured organic infrared photovoltaic semiconductor detector and a plane-configured organic ultraviolet photovoltaic semiconductor detector. Compared with the optical waveguide detector, the detector of the invention has the advantages of fast response speed, low power dissipation, easy formation of array, no need of offsetting and the like. In addition, the detector of the invention has the characteristics of low cost, easy realization of controllable electrical resistivity of large area photosensing materials, no need of refrigeration, realization of flexible processing and the like, thus having important potential application values in the military field, the civil field and some specific fields.

The invention discloses an HOV lane vehicle passenger number detection method and device. The method comprises the following steps: when a vehicle passes, triggering a control module to start a frontshooting module and a side shooting module to simultaneously shoot the front face and the side face of the passing vehicle respectively; sending the shot picture data to the control module for processing and calculating vehicle features and the number of passengers; and through the control module, carrying out vehicle behavior judgment according to the obtained vehicle features and the number of passengers. By shooting the front and side faces of the vehicle on an HOV lane, the case that the detected number of passengers is smaller than actual number of passengers due to shielding of front passengers when only the front face is shot is prevented, so that accuracy of the detection result is ensured; through a short-wave infrared shooting device, capability of imaging through side windows ofthe vehicle is realized; and the device and method have the advantages of day-night imaging, no need of refrigeration and being harmless to human eyes. The HOV lane vehicle passenger number detectionmethod and device can be widely applied to the traffic control field.

The invention discloses a device and a method for monitoring flame stability based on an electrostatic sensor. The device comprises an electrostatic sensor 1, a pre-amplifying circuit 6, a secondary amplifying and filtering circuit 7, a signal processing and data analysis unit 8 and a display unit 9, wherein the electrostatic sensor 1 is formed by embedding three pairs of staggered strip electrostatic electrodes 3 into one end, near a combustor flame 3, of the electrostatic sensor 1, and is used for sensing the information of combustion property of the combustor flame 2 in the corresponding position; each electrostatic electrode 3 is insulated from other parts by an electrode insulation material 4; a shielding outer casing 5 is arranged, so as to prevent the signal from being interfered; the output end of each electrostatic electrode 3 is directly connected with the pre-amplifying circuit 6, so as to improve the signal to noise ratio; the output end of the pre-amplifying circuit 6 is connected with the secondary amplifying and filtering circuit 7, so as to realize the secondary amplifying and filtering, and the output end of the secondary amplifying and filtering circuit 7 is connected with the signal processing and data analysis unit 8; the output end of the signal processing and data analysis unit 8 is connected with the display unit 9; finally, the flame feature parameters are finally displayed by the display unit 9.

The invention discloses a selective catalytic reduction (SCR) urea jet device of a diesel engine, and belongs to the technical field of engine exhaust purification treatment. The SCR urea jet device comprises a mixing cavity; the mixing cavity is provided with a gas source inlet, a urea inlet and a liquid outlet pipe; the gas source inlet is sequentially connected with an air pressure maintainingvalve and an air electromagnetic valve through pipelines; a nozzle is fixedly arranged on the urea inlet; the nozzle is sequentially connected with a safety pressure limiting valve, a gear pump, a urea filter and a urea tank through pipelines; the tail end of the liquid outlet pipe is connected with a mechanical atomizer; and the atomizer is arranged on an exhaust pipe of the external diesel engine. The SCR urea jet device of the diesel engine has simple structure and is reasonable in design. Quantitative jet of aqueous solution of urea is realized through the electromagnetic nozzle; and meanwhile, the urea corrosion and high temperature resistant mechanical atomizer is directly arranged on the high temperature exhaust pipe by adopting an air assisting mode, so that the reliability of thesystem is promoted.

The invention relates to the technical field of photoelectric imaging detection, and particularly relates to a single photon imaging detector and a manufacturing method thereof. The manufacturing method comprises the following steps: a silicon substrate microchannel plate is manufactured, and a micro through hole array is arranged in the silicon substrate microchannel plate; a CMOS (Complementary Metal Oxide Semiconductor) imaging sensor array is manufactured; a photoelectric cathode is manufactured and tested in a packaging device, device wafer level structural integration is carried out on the silicon substrate microchannel plate, the CMOS imaging sensor array and the photoelectric cathode, the single photon imaging detector is formed, and the single photon imaging detector is tested. The wafer level packaging processing technology is adopted, the photoelectric cathode, the silicon substrate microchannel plate and the CMOS imaging sensor array are directly coupled, and a high-flexibility, high-speed, high-resolution, low-cost, low-power consumption, high-frame frequency, no-cooling and compact-size single photon imaging detector.

The invention relates to a method for realizing photocatalytic degradation of reductive pollutants in water through feeble ultraviolet light and simultaneously producing hydrogen, which is to realize the removal of the reductive pollutants in water body and simultaneously produce the hydrogen in a closed system with an atmosphere which is oxygen-free or has the oxygen content of less than 5 mmol.dm, in the presence of photocatalyst and under the irradiation of light with the wavelength of between 200 and 400 nanometers, wherein the reaction temperature is between 0 and 95 DEGC; the reaction pressure is between 0 and 3 atmospheric pressure; and the light intensity of a single ultraviolet light source is less than 100 mW.cm. Compared with the prior photocatalytic decomposition water, the method has the advantages that the hydrogen yield is obviously increased; reductive water body pollutants, particularly organic pollutants provided with a plurality of aromatic functional groups can be effectively removed; light energy and energy of the reductive pollutants can be converted into chemical energy of the hydrogen-the future energy carrier; and the energy consumption is low, heat dissipation is not required, and industrialization is easy.

The invention provides an energy-saving belt type sludge low-temperature drying device, and belongs to the technical field of sludge drying method processing devices. The drying device comprises a sludge feeding and forming zone, a drying zone, a heat pump heating zone, a clean energy heating zone, a circulating condensing zone and a discharging zone, wherein the drying zone is provided with a sludge outlet, and the sludge outlet is located at the end of the conveyor belt running direction. Dried sludge is delivered to the discharging zone through the sludge outlet and discharged. The drying device not only achieves continuous drying of the sludge, but also effectively uses the clean energy to achieve low-temperature low-energy drying of the sludge.

The invention discloses a gravity boost water delivery machine, and relates to high-rise water delivery, water storage, water supply, electricity generation by water energy and other application of water energy. According to the basic structure and principle of the prior volume delivery single-cylinder single-acting reciprocating pump, the invention develops a working piston rod into a water storage cylinder, and combines the water storage cylinder and a piston into a piston assembly capable of storing and emptying water to replace the prior piston rod; when the piston assembly works, water source without drop height is led into the water storage cylinder of the piston assembly, so as to increase the weight of the water storage cylinder, improve kinetic energy of the piston descending gravity speed, and achieve the improvement of gravity boost horsepower; at the same time, the vacuum generated when the piston assembly ascends to enlarge the volume and reduce the pressure of a working chamber thrusts aside an emptying valve on the piston assembly and the water in the water cylinder is emptied into a working chamber of a pump cylinder, so as to lighten the ascending weight of the piston assembly to achieve reset after the emptying, and further realize effective energy conservation of the gravity boost water delivery machine in the water delivery process.

The invention discloses a magnetic bearing used for a switch reluctance motor. The magnetic bearing comprises a magnetic bearing supporting sleeve, an annular guide groove is formed inside the magnetic bearing supporting sleeve, a magnetic bearing rotor arranged outside a motor rotating shaft in a sleeving manner is arranged in the annular guide groove, a magnetic bearing radial control set is arranged on the outer side of the magnetic bearing rotor, magnetic pieces are arranged at one end of the magnetic bearing radial control set, and the outer sides of the magnetic pieces are each providedwith a magnetic bearing axial control winding and a magnetic bearing radial control winding; and concave grooves are formed in the two sides of a notch where the magnetic bearing and the motor rotating shaft are connected in a sleeving manner, a plurality of elastic elements are arranged in each concave groove, and a radial distance sensor is further arranged on the notch. The magnetic bearing issmall in friction loss and high in working efficiency, the rotor floats on the space through magnetic field force, the bearing supporting performance is good, the rotating shaft is prevented from being collided, and the radial sensor monitoring function is achieved.

The application discloses a power battery pack and a vehicle. The power battery pack comprises a tray and an upper cover, wherein the upper cover is connected to the tray to define a battery individual receiving cavity; a plurality of battery individuals installed in the battery individual receiving cavity. A heat-conducting insulating layer is disposed between the battery individuals and the upper cover and the upper cover includes a heat-conducting plate. The power battery package of the application has a simple structure, low assembly cost, high energy density, and a good heat dissipation capability, and does not consume the cooling capacity of the whole vehicle during heat dissipation.

The invention belongs to the field of engineering machinery, and in particular, relates to a parking brake. A brake wheel is arranged on a brake shaft; the brake shaft can move in the axial directionof the brake wheel; a brake shell and a piston shell are fixed through a bolt; a brake module for limiting rotation of the brake wheel is arranged between the brake shell and the piston shell; a flange plate is fixed on the end surface, near the side of the brake shell, of the brake shaft; a spring base is fixed on the piston shell; a piston sleeves the brake shaft, and can axially move between the piston shell and the spring base; a clutch spring set for pushing the piston to move to the side of the flange plate sleeves the spring base; the piston shell is provided with an intake port passingto an axial gap between the piston shell and the piston; and a tooth form cooperating with a shaft end surface of an axle rim transmission shaft is arranged on the outer end surface of the flange plate. No or less wear and heat are generated between friction plates, so that cooling and lubrication are not needed; and as the friction plates are not directly acted on, pressure for relieving brakingis lower, and gas source power is adopted to achieve energy conservation and environmental protection.

The invention discloses a high-sensitivity uncooled infrared detector. In the detector, a copolymer of polyvinylidene fluoride and trifluoroethylene is used as a pyroelectric material and grown on a polyester material substrate, on which a metal bottom electrode is prepared, by a Langmuir-Blodgett method; then a top metal electrode is grown on the surface of the material to form a capacitor structure; and a poly-3,4-ethylenedioxythiophene / polystyrene sulfonate conductive polymer is grown on the top electrode to serve as an infrared absorbing layer.

The invention belongs to the technical field of chemical engineering and particularly discloses a method for synthesizing aromatic alkyl ether (Ar-O-R). The method comprises the following steps: taking aromatic phenol, a strong alkaline solution and alkyl sulphate as raw materials; carrying out high-speed mixing, high-temperature reaction, pH regulation, liquid phase separation, oil phase alkali wash, water phase alkali adding distillation and the like, thus finishing synthesis of asymmetric aromatic alkyl ether. Compared with a traditional synthesis method, the method disclosed by the invention has the advantages that reaction time is greatly shortened; the utilization rate of sulfate is high; and by adopting a material circular technology, the utilization rate of the aromatic phenol canreach 100 percent, and the purity of a product can reach 99 percent or above.

The invention provides a film-type two-way hydraulic vibration near-resonance type double-drum vibrating mill, comprising drums, film-type hydraulic vibration exciters, near-resonance spring groups, bases and hydraulic devices, wherein each film-type hydraulic vibration exciter comprises a film made of a flexible material, and two parallel rigid panel I and rigid panel II; the film is arranged between the rigid panel I and the rigid panel II; the film can form a closed space for containing a liquid independently or together with the rigid panel I or the rigid panel II; the liquid can pass in and out of the closed space through a channel; the closed space is communicated with a hydraulic source of which the flow direction periodically changes through the channel; the vibrating mill does not need a bearing; the hydraulic device does not need a piston; the exciting force can be completely balanced; the film-type two-way hydraulic vibration near-resonance type double-drum vibrating mill is simple to manufacture, convenient to repair, low in cost, high in vibration force, free of abrasion, free of leakage, free of heat dissipation, even in vibration force distribution, low in energy consumption, and small in external vibration interference; stepless frequency modulation and amplitude modulation can be achieved without shutdown; and the frequency modulation is uncorrelated to the amplitude modulation.

The invention relates to a method and a device for draining waste water (7) from the inner bend of the strand guide (3) of a beam blank casting machine. In order to drain said waste water from the beam blank in a targeted and controlled manner, a draining device (6) is arranged in the area of the strand guide (4) for the beam blank, said device being provided with jet nozzles (8). Under the effect of jets (13, 14) directed with high energy against the water flow direction, the waste water is lifted on the formation of a banking-up pressure by means of said draining device (6), directed at the lateral edges (11) of the inner bend (4) of the beam blank (10) and collected in a sintered groove (9), arranged thereunder.

The invention discloses a method for extracting metal cobalt and tungsten from a scrap hard alloy and a special calcining device, belonging to the technical field of recovery of the scrap hard alloy. The method comprises the following steps of: placing the scrap hard alloy into a hydrogen environment inside a tubular calcining furnace, and calcining at the temperature of 1700-1750 DEG C; then separating powder through crashing and ball-milling; and then extracting the metal cobalt and the metal tungsten by using a chemical method. In an extraction process of the metal cobalt and the metal tungsten, the scrap hard alloy is firstly calcined so that it is extremely easy to obtain the powder through the ball-milling, and the efficiency of extracting the metal cobalt, the metal tungsten and other metal elements by utilizing the scrap hard alloy is greatly enhanced.

The invention discloses a wireless cloud terminal user interface connector which comprises an enclosure and a core circuit arranged in the enclosure. The core circuit comprises a processor and a WiFi (Wireless Fidelity) module, a 3G (3rd Generation) wireless module, a data storage, an operating system storage SD (Secure Digital) card, a GPU (Graphics Processing Unit) graphics decipherer and an audio encoder / decoder which are connected with the processor; the data storage and the operating system storage SD card are connected; a display interface, a mouse interface, a keyboard interface, a microphone interface and a speaker interface are arranged on the enclosure; and the WiFi module and the 3G wireless module are respectively connected with the external network. The wireless cloud terminal user interface connector adopts an embedded operating system and is connected with the Internet by a display, auxiliary equipment such as a keyboard and a mouse and the 3G wireless module so as to be connected to a cloud computing server terminal; and by an account and a password of a terminal user, functions similar with those of a local computer can be implemented on the user terminal and the operation of corresponding working tasks can be carried out.

The invention relates to a GaN-based photothermal detection thin film element. The thin film element comprises a single crystal substrate, [p-GaN / n-GaN]N superlattice, a metal electrode, a lead, an absorption layer, an antireflective protective layer, thermal conductive adhesive and a heat sink, wherein the single crystal substrate is (001) oriented and beveled along an axis c, the [p-GaN / n-GaN]Nsuperlattice alternately epitaxially grows on the single crystal susbtrate, stops at a p-GaN surface and etches a trapezoid table, the metal electrode is arranged at two sides of the [p-GaN / n-GaN]N superlattice and the single crystal substrate in an inclination direction of the axis c so as to form ohmic contact, the metal electrode is led out by the lead and is connected with a signal input end,the absorption layer covers an effective detection surface of the [p-GaN / n-GaN]N superlattice, the antireflective protective layer convers the absorption layer, and the heat sink is connected and fixed with the single crystal substrate through the thermal conductive adhesive. The thin film detection element is small, has high sensitivity and large damage threshold, responds rapidly, can be produced in large scale, and realizes both wide-spectrum detection and thermal radiation detection.

The invention discloses a static force hydroenergy water feeder which is suitable for the water source recycling field including municipal first water supply, high-rise secondary pressure water supply, circulating cooling water, construction water saving, water storage and hydropower, drought resisting, surface water draining and the like. Pressure generated by U-type fluid static force in a pressure balance process serves as a high-potential-energy kinetic energy source for water feeding, the basic structure and the basic principle of a volumetric single-cylinder-body reciprocating pump are combined, a working piston rod is designed to be a water storage cylinder, and a piston assembly capable of storing water and feeding water is composed of the working piston rod and a piston. When a high-head water source passes through the working piston rod, the static force of the water source is converted into a dynamic force with pressure to improve gravity speed kinetic energy of the piston when the piston moves down, not only is static force pressurizing power promoted when the piston moves down, but also the piston assembly is driven to move down rapidly, an external water source flowing into the water storage cylinder of the piston assembly is pushed, and the purpose of the water feeding which is low in energy consumption, efficient and energy-saving is achieved.

The invention discloses an acid gas vertical reactor, in which more than two reaction zones are provided. A buffer zone is arranged under the most front reaction zone and is provided with an acid gas inlet and a generated liquid outlet; and a purified gas outlet and an alkali liquid inlet are disposed on the last reaction zone. Each reaction zone includes a liquid receiving tray, a connecting tube and a rain cap, wherein the two adjacent reaction zones are separated through the liquid receiving tray. The connecting tube is arranged at the center of the reactor axially and passes through the liquid receiving tray vertically. The two adjacent reaction zones are communicated by the connecting tube. The rain cap is arranged over the connecting tube. Each reaction zone is provided with an absorption liquid inlet and a reaction liquid outlet which are connected to each other through a pipeline. In the acid gas processing method, a NaOH solution is employed as an absorption liquid to treat the acid gas and to produce sodium hydrosulfide. Compared with a reactor in the prior art, the acid gas tubular reactor achieves both acid gas purification and pollutant recycling.

A method and a manufacturing process for removing silicon dioxide from a wafer are disclosed. The method may include the following steps: dehydrated hydrogen fluoride gas and dehydrated alcohol gas are introduced into the process chamber, the dehydrated hydrogen fluoride gas and the dehydrated alcohol gas are mixed to generate a gaseous etchant, the etchant is reacted with the wafer within the process chamber, a high pressure state is maintained in the process chamber to increase an etching selectivity ratio, and byproducts of reaction are withdrawn from the process chamber. According to the method for removing silicon dioxide on the wafer disclosed in the present invention, the gaseous etchant is directly reacted with the silicon dioxide under high pressure, reaction products are extracted after the reaction, and therefore silicon dioxide can be removed with a high selectivity ratio and high efficiency.

The invention discloses a novel non-contact infrared temperature measuring probe. The structure of the probe comprises a probe body and an installing bracket. The outer side of the probe body is provided with installing threads. Double nuts sleeve on the installing threads. The installing bracket is fixedly arranged between the double nuts. A fixing bolt is connected on the lower end of the installing bracket. A lead is connected on the right end of the probe body. A power supply line and a signal transmission line are wrapped in the inner side of the lead. The lower side of the lead is provided with a work indicating lamp and a laser switch. The left end of the probe body is provided with a groove which is internally provided with a Fresnel lens. A photoelectric detector is connected on the inner side of the Fresnel lens. The photoelectric detector is arranged inside the probe body. The right side of the photoelectric detector is respectively provided with an electrothermal stack infrared temperature sensor and a signal processing circuit board. The novel non-contact infrared temperature measuring probe is simple in structure, convenient to install and disassemble, accurate in locating, convenient to adjust the angle of the probe, stable in measurement and long in service life.

The invention relates to the field of voltage source converter based high voltage direct current (VSC-HVDC), in particular to a grounding device of a modular multi-level VSC-HVDC system and a design method of the grounding device. The grounding device is arranged at the alternating current (AC) side of a modular multi-level VSC-HVDC, is used for AC / DC component working conditions in the VSC-HVDC system and is used for meeting positive and negative voltage sharing of the DC side of the VSC-HVDC system or providing a zero-sequence current path. The grounding device comprises a grounding transformer and a grounding resistor which are connected with each other and a Z-type transformer or a star-delta transformer is adopted to serve as the grounding transformer. The design method comprises the following steps: A, determining excitation reactance parameters of the grounding transformer; B, determining parameters of the grounding resistor. The grounding device is low in loss, and meanwhile, improvements are performed on the traditional technological base of the grounding device, so that the required development is low in difficulty and is reliable, simple and convenient. The grounding device has the advantages that the occupied area is small, the manufacturing cost is low, and the operational stability is high.

The invention discloses an ultraviolet fluorescent three-signal water quality sensor using a single UV-LED as a light source and its application, belonging to the fields of environmental monitoring and water treatment. The ultraviolet fluorescent three-signal water quality sensor of the present invention comprises an optical path part and a signal control processing part, and the optical path part includes a UV-LED, a sample pool, an ultraviolet detector, a fluorescent detector A and a fluorescent detector B; the signal control processing part includes A power module, a signal amplifier A, a signal amplifier B, a signal amplifier C, an analog-to-digital converter and a microprocessor. The invention has no consumption of chemical reagents, can realize the real-time monitoring of the overall concentration change of dissolved organic matter in the water body, and can reflect the real-time change of the concentration of fluorescent components such as proteins or humic substances, and can be used for online prediction of the generation potential of disinfection by-products And the degree of degradation of micro-pollutants in the advanced oxidation process, providing a sensitive, fast, efficient, economical, simple but informative online monitoring device for water treatment.

The invention relates to a solar concentrating method and device based on a periodic microstructure, and particularly relates to a solar concentrator. The device comprises a transparent medium substrate and solar batteries, wherein a transparent thin film covers the upper surface of the transparent medium substrate; a periodic microstructure is prepared on the transparent thin film; and the solarbatteries are arranged on two sides of the transparent medium substrate, which are parallel to the direction of a grating slot line on the transparent thin film. When sunlight is incident to the transparent thin film of the solar concentrating device based on the periodic microstructure, the diffraction order with a diffraction angle exceeding the total reflection angle of the medium substrate spreads inside the medium substrate and finally arrives at the solar battery on the sidewalls of the medium substrate; and the diffraction order not forming the total reflection in the medium substrate and the zero order of the incident sunlight play the lighting role through the transparent medium substrate. The solar concentrating device has the advantages of small size, simple structure, low cost, no tracking, large receiving angle, high concentrating uniformity, and the like, and is particularly suitable for any buildings and vehicles with glass windows.

The invention relates to a centrifugal rotary crystallizer and a recovery tower for efficiently recovering carbon dioxide. The centrifugal rotary crystallizer comprises a crystallizer body, a motor for driving the crystallizer body to rotate and heat dissipation devices mounted on the two sides of the crystallizer body; the crystallizer body comprises a center shaft, a plurality of crystallizationtubes, fixed structures and a reinforced structure; one end of the center shaft is connected with the motor; the plurality of crystallization tubes surround the center shaft and are arranged in parallel to the center shaft, and each of the two ends of the crystallization tubes is fixed with the one fixed structure; the fixed structures are sheathed on the center shaft and are fixed; the reinforced structure is used for reinforcing a relative position relationship between the crystallization tubes and the center shaft, the motor rotates to drive the center shaft to rotate and further drive thecrystallizer body as a whole. The centrifugal rotary crystallizer can use a high-concentration (20-40 percent) sodium carbonate circulating solution, is low in energy consumption, small in equipmentsize, very high in equipment utilization rate, full in reaction, high in crystallization efficiency and is not required to be heated and cooled; meanwhile, the crystallization does not affect the production, and a fault that the tower is blocked by the crystallization cannot be generated.