125results about How to "No need for frequent maintenance" patented technology

The invention discloses a multi-mode electromagnetic energy-regenerative vehicle active suspension actuator. The multi-mode electromagnetic energy-regenerative vehicle active suspension actuator comprises an actuator main body and an actuator controller, wherein the actuator main body comprises a piston cylinder, a permanent magnet linear motor module, an adjustable damping vibration absorber module, an actuator upper end cover and a lower lifting lug. The permanent magnet linear motor module comprises a secondary piston rod, a linear motor upper end cover, a linear motor lower end cover, a plurality of silicon steel sheets, a plurality of primary coils and a permanent magnet; the adjustable damping vibration absorber module comprises a vibration absorber piston rod, a sleeve, an upper lifting lug, a sealing separation plate, a big piston, a small piston, a damping liquid passage and a proportional electromagnetic valve; and an input end of the actuator controller is connected with an acceleration sensor, a sprung mass speed sensor and an unsprung mass speed sensor. The invention further discloses a control method for the multi-mode electromagnetic energy-regenerative vehicle active suspension actuator. The invention is advantaged in that the energy-regenerative efficiency of the multi-mode electromagnetic energy-regenerative vehicle active suspension actuator is high, the service life of a vehicle-mounted storage battery can be effectively prolonged and an active suspension is in an optimal vibration absorbing state.

The invention provides a solid crystal machine head bonding mechanism. The mechanism comprises a crystal fetching arm drive control device and a crystal fetching arm, wherein the crystal fetching arm drive control device drives the crystal fetching arm to move. The crystal fetching arm drive control device comprises an up and down drive control device and a rotary drive control device, wherein the rotary drive control device is arranged on the up and down drive control device. The up and down drive control device comprises a servo motor, a coupler and an integral actuator, wherein the servo motor drives the integral actuator to move up and down through the coupler; the rotary drive control mechanism comprises a servo motor, a coupler and a rotary shaft; and the servo motor drives the rotary shaft to rotationally move through the coupler. The mechanism changes the traditional way of driving the crystal arm to rotate through the transmission of other parts, simplifies the mechanism of a head bonding drive control device and reduces cost.

The invention discloses an automatic overhead door, comprising a door panel, a door panel fixed frame, a guide rail, a door panel fixed frame connecting block, a travel switch, a limit stock, an elastic sealing ring, a flange, a motor and a transmission device, wherein the door panel fixed frame is arranged around the door panel; the door panel and the door panel fixed frame are connected elastically by a gas spring and are connected with a rotatable connecting piece; the guide rail is fixed on the body of the fixed frame of a sterilizing container and is provided with a chute; one end of thedoor panel fixed frame connecting block is connected with the door panel fixed frame, and the other end is located in the chute of the guide rail; the travel switch is fixed on the body of the fixed frame of the sterilizing container, and the control end is connected with the limit terminal of the door panel fixed frame; the limit block is installed at the bottom of the door panel, and a limit wheel is arranged at the bottom of the limit block; the elastic sealing ring is positioned at the edge of the sterilizing container; the flange is connected with the sterilizing container; the limit wheel is fitted with a flange slot; and the motor is fixed on the guide rail and is connected with the door panel fixed frame by the transmission device. Lifting is realized by tension of the lateral sides of the door panel, parts are not easy to be damaged and have no abrasion, and the door panel is tightly sealed with the sealing ring by the door panel fixed frame, thereby ensuring the tightness.

The invention belongs to the technical field of automobile suspension frame systems and particularly relates to a composite damping-adjustable feed energy type active suspension frame actuator and a control method thereof. Through the organic combination of an actuator control system and an actuator body composed of an oil storage cylinder, a work cylinder, a proportional solenoid valve and a power transmission mechanism, the defect of large energy consumption of traditional active suspension frames is overcome; through simple control, not only is the damping effect of a suspension frame improved, but also the vibration energy can be recycled. The actuator can be switched between an active control mode and a feed energy mode when used, and a real-time variable damping effect is achieved. The control operation stability and the reliability are high, faults are unlikely to occur, and frequent maintenance and repair are not needed; the actuator is high in integration degree and practicability, great in use effect and convenient to popularize on the market.

The invention discloses a semi-active vehicle suspension system with a vibration energy recycling function. The system comprises a damper, a spring, a control system and an energy recycling system; the damper comprises a hydraulic cylinder, a hydraulic motor, a direct-current motor, a first transmission shaft, a first roller clutch, a second roller clutch, a first bevel gear, a second bevel gear, a third bevel gear and a second transmission shaft; the control system comprises a suspension vibration controller, a force sensor, a sprung mass acceleration sensor, a sprung mass displacement sensor, a non-sprung mass displacement sensor and a direct-current motor driver; the energy recycling system comprises an energy recycling circuit and a super capacitor. The invention further discloses a control method of the semi-active vehicle suspension system with the vibration energy recycling function. Accordingly, the working stability and reliability are high, the energy feedback efficiency is high, the service life of a vehicle-mounted storage battery can be effectively prolonged, parameters of a semi-active suspension can be duly adjusted, and then the semi-active suspension is in an optimal vibration reduction state.

The invention relates to a driving component, a cleaning device with the driving component and an ultraviolet sterilizing equipment with the cleaning device, wherein the driving component comprises a motor, a controller, touch switches, a rotating screw rod and a transmission nut, wherein the controller controls the operation of the motor; the touch switch is connected with the controller; the rotating screw rod is driven by the motor; the transmission nut is sheathed outside a transmission screw rod; and the touch switches are close to the two ends of the rotating screw rod. The cleaning device comprises a wiper for wiping a lamp tube and a clamping piece, and is characterized by also comprising the driving component; and the wiper and the transmission nut are respectively and fixedly clamped on the clamping piece. In the driving component provided by the invention, the structure is simple, the installation is convenient, the cost is low, simultaneously the operation is stable, the service life is long and frequent maintenance is not needed.

The invention discloses a self-powered type vehicle active suspension which comprises an actuator, a spring, a power module circuit, a super capacitor and a controller; the actuator and the spring are arranged between a vehicle body and a vehicle bridge in parallel; the input end of the controller is connected with a sprung mass speed sensor and an unsprung mass speed sensor; the actuator is composed of a piston barrel, a linear motor unit, a variable damping unit, an upper lifting lug, a lower lifting lug, a piston barrel upper end cover and a piston barrel lower end cover; the linear motor unit is composed of a piston rod and a plurality of permanent magnets; a partition plate is arranged in the piston barrel; a plurality of silicon steel sheets and a plurality of primary windings are arranged in the piston barrel between the piston barrel upper end cover and the partition plate; the variable damping unit is composed of a piston and a damping liquid channel; and a plurality of proportional electromagnetic valves are arranged on the damping liquid channel. The invention also discloses a coordinated control method of the self-powered type vehicle active suspension. The self-powered type vehicle active suspension is high in working stability, reliability, energy reclaiming efficiency and real time and can be in the optimal vibration attenuation state.

The invention discloses an electromagnetic energy feeding type vehicle active suspension actuator. The electromagnetic energy feeding type vehicle active suspension actuator comprises an actuator body and an actuator controller. The actuator body comprises an electromagnetic linear motor module and a variable-damping shock absorber module. The electromagnetic linear motor module comprises a plurality of primary coils, a plurality of primary iron chips and a secondary piston rod. The variable-damping shock absorber module comprises a shock absorber piston rod, a piston, a piston cylinder and damping oil. The shock absorber piston rod is a hollow piston rod. The multiple primary iron chips are arranged on the inner wall of the shock absorber piston rod. The primary coils are wound in gaps between the multiple primary iron chips. A throttling hole is formed in the piston. A throttling hole adjustment valve plate and a throttling hole adjustment motor are connected to the piston. The invention further discloses a control method of the electromagnetic energy feeding type vehicle active suspension actuator. The electromagnetic energy feeding type vehicle active suspension actuator is stable and reliable in work and high in energy feeding efficiency; the service life of a vehicle-mounted storage battery can be effectively prolonged, and an active suspension can be made to be in an optimal shock absorbing state.

The invention discloses a vehicle active suspension actuator with an energy self-supplying function. The vehicle active suspension actuator with the energy self-supplying function comprises an outer sleeve, a guide rod, a guiding sleeve, a first inner sleeve, a second inner sleeve and a first guiding and sealing device, wherein the bottom of the guide rod is connected with a piston; the middle upper portion of the guide rod is connected with a permanent magnet; a coil is wound on the second inner sleeve; a baffle is arranged on the inner lower portion of the outer sleeve; a brushless direct-current motor is arranged on the inner bottom of the outer sleeve; a hydraulic pump is arranged on the top of the baffle; the inner lower portion of the first inner sleeve is connected with a second guiding and sealing device; a rotating shaft of the brushless direct-current motor is connected with a rotating shaft of a hydraulic pump; a first oil opening of the hydraulic pump is in threaded connection with a threaded hole; an upper through hole is formed in the upper portion of the first inner sleeve; and a lower through hole is formed in a section, which is positioned between the baffle and the second guiding and sealing device, of the first inner sleeve. The invention also discloses a control method for the vehicle active suspension actuator with the energy self-supplying function. By the vehicle active suspension actuator with the energy self-supplying function and the control method for the vehicle active suspension actuator with the energy self-supplying function, the service life of a vehicle-mounted storage battery can be prolonged, and an active suspension can be in an optimum vibration reduction state.

The invention discloses an automatic sunlight tracking device. The automatic sunlight tracking device comprises a first upright post, a second upright post, a rotating shaft, an electric motor and a solar cell panel assembly, wherein the first upright post and the second upright post are arranged in parallel at an interval, the rotating shaft is erected at the top end of the first upright post and the top end of the second upright post, the electric motor is connected with the rotating shaft, the solar cell panel assembly is installed on the rotating shaft, the length of the first upright post is longer than that of the second upright post, the electric motor is fixedly connected with the second upright post through a reducing motor support, a sunlight test box grating groove is connected with the side wall of the top end of the first upright post, a photosensitive element and a controller are installed inside the sunlight test box grating groove, the controller is connected with the electric motor, a first travel switch is connected with the top end of the second upright post, a second travel switch is connected with the top end of the second upright post, and a position measurement head which contacts with the first travel switch or the second travel switch is connected with the rotating shaft. The automatic sunlight tracking device is simple in structure, reasonable in design, convenient to install, capable of achieving full-automatic control, saving electric power and saving costs, convenient to use and operate, low in electric power consumption, long in service life and convenient to popularize and use.

The invention provides a sewage treatment method, comprising the following steps: S1: sewage enters a pretreatment pool, and a grid is arranged in the pretreatment pool, and the sewage flows through the grid to remove some sundries in the sewage; S2: the sewage passes through the pretreatment pool After treatment, it enters the anaerobic hydrolysis tank for treatment; S3: After being treated by the anaerobic hydrolysis tank, the sewage enters the composite biological filter, and flows through the first filter layer of the composite biological filter, the aerobic zone of the second filter layer and the The anoxic zone of the second filter material layer; biofilms are attached to the first filter material layer and the second filter material layer; S4: The sewage is directly discharged or returned to the pretreatment tank after being treated by the composite biological filter Continue processing. The sewage treatment method provided by the invention can adapt to rural sewage treatment and has the characteristics of stable treatment effect and the like.

The invention discloses a multi-mode hybrid suspension actuator and a control method thereof. The multi-mode hybrid suspension actuator comprises an actuator body and a control unit, wherein the actuator body comprises an air spring mechanism, a double-rod type magnetorheological damper, an upper linear motor unit and a lower linear motor unit, wherein the double-rod type magnetorheological damperis arranged in the air spring mechanism; the upper linear motor unit is arranged at the upper part of the double-rod type magnetorheological damper and is positioned in the air spring mechanism; andthe lower linear motor unit is arranged at the lower part of the double-rod type magnetorheological damper. The method includes the following steps: I. preforming data acquisition and synchronous transmission; II. calculating the ideal damping force under LQG control of a vehicle suspension; III. calculating the root mean square value of the weighted acceleration of the vehicle; and IV. controlling the multi-mode hybrid suspension actuator. The actuator is novel and reasonable in design, convenient to realize, low in cost, high in working stability and reliability, high in energy feeding efficiency and high in real-time performance, can enable the hybrid suspension to be in an optimal vibration damping state, is strong in practicability, and convenient to popularize and use.

The invention discloses a ball screw type self-energized semi-active suspension actuator. The ball screw type self-energized semi-active suspension actuator comprises an actuator body and an actuatorcontrol system. The actuator body comprises an upper shell, a lower shell, a lead screw shaft, a first transmission shaft, a second transmission shaft, an output shaft, a direct current brushless motor, a ball screw, a lead screw fixing nut, a lead screw shaft gear, a first transmission shaft first gear, a first transmission shaft ratchet wheel, a first transmission shaft second gear, a second transmission shaft gear, an output shaft first gear, an output shaft second gear, a lead screw nut and a cross-shaped connector. The actuator control system comprises an actuator controller, a computer,a vehicle speed sensor, a road surface unevenness displacement sensor, an unsprung mass displacement sensor, a sprung mass displacement sensor and an actuator speed sensor. The invention further discloses a control method of the ball screw type self-energized semi-active suspension actuator. By adopting the ball screw type self-energized semi-active suspension actuator, a large amount of inertia loss is avoided, the energy feedback efficiency is improved, and the working stability and the reliability are high.

The invention discloses a vehicle mixed suspension actuator and a multi-mode coordinated switching control method thereof. The vehicle mixed suspension actuator comprises an actuator body and a control unit, the actuator body comprises a double-outlet rod type magneto-rheological damper, an upper linear motor unit and a lower linear motor unit, the upper linear motor unit is arranged on the upperportion of the double-outlet rod type magneto-rheological damper, and the lower linear motor unit is arranged on the inner lower portion of the double-outlet rod type magneto-rheological damper. The method includes the steps: firstly, acquiring date and synchronously transmitting the date; secondly, calculating ideal damping force of a vehicle suspension under LQG (linear quadratic Gaussian) control; thirdly, calculating a vehicle weighted acceleration root-mean-square value; fourthly, coordinating, switching and controlling an energy feeding mode, a semi-active control mode and a semi-activecontrol mode. The actuator is novel and reasonable in design, convenient to implement, popularize and use, low in cost, high in working stability and reliability, energy feeding and real-time capability and high in practicability, and the mixed suspension can be positioned in an optimal damping state.

To obtain a component-mounting method and a component-mounting apparatus, by which a component can be mounted on an electronic circuit substrate, while maintaining the inside of component-mounting space at a cleaning state. The component-mounting apparatus 1A is constituted so that the area of a component supply aperture part 14 in the component-mounting space 2 covered with a cover 10 is narrowed by a flap cover 33, a substrate carry-in aperture part 15A and a substrate carry-out aperture part 15B are also narrowed by a fixing plate 34 and a closing plate 35, as required, clean air is suckedfrom an upper air supply means 30, and in a state with the air pressure in the component-mounting space 2 being increased higher than the atmospheric pressure of outside air, a component from a component cassette 20 is carried to the surface of the electronic circuit substrate B through a substrate carrying conveyer 7.

The invention discloses a multifunctional laundry rack system. The multifunctional laundry rack system comprises a plurality of installation top pedestals, a clothes hanging rod, a control box, a rotating motor, a solar panel installation rack, clothes hanging holes, an electrical heating rod, ultraviolet disinfection lamps, an accumulator tank, an accumulator, a first voltage conversion circuit module, an inverter, a USB interface, a power socket, a reel, a retractable line, a hand crank, a universal cradle head, a solar panel, illumination intensity detection sensor, a control circuit board, and a control circuit; the control circuit comprises a MSP430 single chip microcomputer, a second voltage conversion circuit module, a crystal oscillation circuit module, a reset circuit module, a data storage circuit module, an automatic manual selection button, a laundry rack rising button, a laundry rack falling button, a drying button, a sterilizing button, a signal processing circuit module, a charge control circuit, a motor driver, a cradle head driver, a heating control relay, and a sterilizing control relay. The multifunctional laundry rack system is capable of saving energy, and realizing effective utilization of solar energy, is friendly to the environment, and is high in working reliability.

The invention discloses an electro-hydraulic integrated type self-energy supplying active suspension actuator which comprises an actuator main body and an actuator controller, wherein the actuator main body comprises a piston barrel, a piston, an upper piston rod, a lower piston rod, an upper lug ring, a lower lug ring, an upper piston barrel end cover, a lower piston barrel end cover, an upper sleeve, an upper guide base, an upper oil seal, a first sealing ring, a lower sleeve, a lower guide base, a lower oil seal, a second sealing ring and a hydraulic oil; a check valve set, a hydraulic motor module and a brushless direct current motor are embedded into the piston; the check valve set comprises a flow valve, a compression valve, a compensation valve and a rebound valve; the hydraulic motor module comprises a hydraulic motor shell, a shaft sleeve, a first gear, a second gear and a third gear. The invention also discloses a control method for the electro-hydraulic integrated type self-energy supplying active suspension actuator. The electro-hydraulic integrated type self-energy supplying active suspension actuator is novel and reasonable in design, convenient in realization and low in cost; the suspension actuator can be under the optimal vibration attenuation state; the driving smoothness and the operation stability of the vehicle can be more effectively promoted.

The invention discloses a fire-fighting spraying device for a smart city large-scale supermarket center, and particularly relates to the field of smart cities. The fire-fighting spraying device comprises a connecting end, a control valve cavity is fixedly installed at the bottom end of the connecting end, a piston valve cavity is fixedly connected to one side of the control valve cavity, and a fire temperature sensing mechanism is fixedly installed at the bottom end of the piston valve cavity; a locking mechanism is arranged in the piston valve cavity, a splash box connecting base is fixedly installed at the bottom end of the control valve cavity, a rotary splash mechanism is fixedly installed at the inner side of the splash box connecting base, and the connecting end comprises a threadedconnecting end and a fastening nut; and by arranging a mechanical control assembly structure, a temperature sensing piston rod type fire disaster temperature sensing mechanism is used for sensing theenvironment temperature and automatically controlling locking and opening of the valve body, automatic spraying starting is achieved, a non-electronic control structure enables the device to be more stable in use, not prone to being interfered by the external environment and low in limited condition, frequent maintenance is not needed and maintenance cost is saved.

The invention belongs to the technical field of automobile suspension systems and particularly relates to a multi-mode composite energy-feedback type suspension actuator and a control method thereof.The control method of the multi-mode composite energy-feedback type suspension actuator comprises simple steps, the work control mode of a vehicle active suspension is switched through ideal active force and a suspension velocity direction, a vehicle hybrid suspension is switched between a semiactive mode and an active energy consumption work mode, the hybrid suspension can operate in an optimal damping state while energy is saved, the work stability and reliability are high, no fault occurs, and frequent maintenance and repair are avoided.

The invention discloses a mechanical stretching device for a movable sofa, belongs to the field of sofa stretching devices, and used for solving the problems that a mechanical stretching device for the movable sofa is poor in synchronism and high in manufacture difficulty and maintenance cost in the prior art. The invention provides the mechanical stretching device for the movable sofa and with a connecting rod device. According to the device, the connecting rod design is adopted; parts are connected through rivets; and therefore, the synchronism is good; the problems of bilateral unbalance and vibration can be avoided while mechanically stretching; and the mechanical stretching device for the movable sofa has the advantages of being good in stability, simple in structure, convenient to assemble, free of frequent maintenance and low in maintenance cost.

The invention discloses a control system of an integrated self-energized active suspension actuator. The control system comprises an active control system and an energy recovery system, wherein the active control system comprises an actuator, a vehicle speed sensor, a road surface unevenness sensor, an unsprung mass displacement sensor, a sprung mass displacement sensor, an actuator speed sensor and a road surface unevenness detector; and the energy recovery system comprises a driver module, a rectification filtration module, a boosting module, a first metal oxide semiconductor (MOS) switch module, a second MOS switch module, an energy storage module, an open circuit voltage (OCV) detection module, a control module and a control circuit power supply module. The control system is applied toa heavy-duty commercial vehicle, integrates an air spring, a spiral spring and a linear motor, can effectively reduce the stiffness of a suspension system, reduces the deviation frequency of the suspension system, can carry out active control, adjusts the damping of the suspension system according to the operating conditions, and improves the smoothness and control stability. In addition, vibration energy recovery can be carried out, and system self-energization is achieved without the need to consume external energy.

Belonging to the technical field of dyeing liquid wastewater treatment, the invention discloses a hair product industry dyeing liquid wastewater recycling and reuse treatment device and an operation method thereof. According to the key points of a technical scheme, the treatment device comprises a dyeing process dyeing waste liquid pool, a dyeing process flushing wastewater pool, a dyeing liquid wastewater pool, an adjustment pool, a boosting pump, a filter unit, a low pressure pump, a self-cleaning filter, a bacteriostatic modified photocatalytic ultrafiltration membrane apparatus, a reverse osmosis water inlet case, a reverse osmosis boosting pump, a security filter, a high-pressure pump, a reverse osmosis membrane apparatus, and a flushing liquid storage tank. The invention adopts the dyeing process with large wastewater yield as the research object, combines the research results of hair product industry dyeing liquid recycle technologies, employs a bacteriostatic ultrafiltration membrane and reverse osmosis membrane double-membrane combined technology, performs in-situ water quality upgrading on dyeing liquid wastewater to achieve reuse, so that the dyeing liquid reuse rate reaches more than 80%, thus effectively saving fresh water dosage, and basically achieving the purposes of zero discharge of wastewater and reuse of dyes.

The invention discloses a remotely-controlled lifting-type multifunctional laundry rack. The remotely-controlled lifting-type multifunctional laundry rack comprises an infrared remote controller, a plurality of installation top pedestals, a clothes hanging rod, a control box, a rotating motor, clothes hanging holes, an electrical heating rod, ultraviolet disinfection lamps, a reel, a retractable line, and a hand crank; a remote control circuit is arranged in the infrared remote controller; the remote control circuit comprises a first single chip microcomputer, a first laundry rack rising button, a first laundry rack falling button, a first drying button, a first disinfection button, and an infrared emitter; a control circuit board is arranged in the control box; a control circuit is integrated on the control circuit board; the control circuit comprises a second single chip microcomputer, a second laundry rack rising button, a second laundry rack falling button, a second drying button, a second disinfection button, an infrared receiver, a motor driver, a heating control relay, and a disinfection control relay. The remotely-controlled lifting-type multifunctional laundry rack is simple in structure, high in user-friendly degree, complete in functions, high in working stability and reliability; application and operation are convenient; and frequent maintenance is not needed.

The invention relates to an electromagnetic induction heating warm air blower which can particularly improve heating speed and heating efficiency and is efficient and energy-saving. Different from a traditional heating method, the electromagnetic induction heating enables a heating bar to heat oneself without naked light, is high in heating speed, and short in preheat time. Operating frequency is 10KHz-40KHz, operating temperature is 0-500 DEG C, and heating efficiency is high and more than or equal to 85%-99%. The electromagnetic induction heating warm air blower has an automatic temperature control function, is compact in structure, light in device, small in size, low in device production manufacture cost, and long in service life, does not need frequent maintenance, doest not discharge smoke and carbon monoxide and other waste gases in the production operating process, avoids possibility of carbon monoxide poisoning of human and livestock due to indoor warming, is environment-friendly and sanitary in using environment, can not cause environment pollution, and is suitable for circular air warming and material drying such as heating and warming of interiors, vegetable greenhouses, flowers and plants greenhouses and breeding industry livestock colony houses, drying of agricultural products and traditional Chinese medicinal materials.

The invention discloses a delay automatic closing piece. The delay automatic closing piece comprises a shell opened at the upper part, a blocked movable piece, an upper moving driving piece arranged in the shell and driving the blocked movable piece to move up, and a compression spring for pushing the blocked movable piece to move up along central axis of the shell; the blocked movable piece, theupper moving driving piece and the compression spring are coaxially arranged with the shell; and the closing piece realize automatic delay closing actions through pushing of the movable piece to moveup through the compression spring under the internal and external pressure difference effect of a blockage piece in the shell, and is low in investment cost and safe and reliable in use process. Meanwhile, the invention further discloses a gas self-closing valve with a timing closing function; the gas self-closing valve comprises a self-closing valve body with an intake port and an exhaust port; alower opening is formed in the bottom of the self-closing valve body; the delay automatic closing piece is mounted on the outer side of the lower opening; and the delay automatic closing piece is mounted at the bottom of the self-closing valve body, so that the self-closing valve achieves the automatic timing closing function under the condition of normal working.

The present invention discloses an efficient plastic melting cracking flue gas desorption separation purification system, which comprises a flue gas, dust and tar water-washing removal section, a gas decomposition purification section, an oil-water separation section capable of collecting and separating oil-water debris, and an oil-water debris discharge pipeline, wherein the left end and the right end of the oil-water debris discharge pipeline are respectively connected with the flue gas, dust and tar water-washing removal section and the oil-water separation section, and the upper portion of the flue gas, dust and tar water-washing removal section is connected with the gas decomposition purification section through a flue gas pipeline. With the efficient plastic melting cracking flue gas desorption separation purification system, the problem that the existing waste plastic recovery process can produce harmful gas so as to pollute the environment can be solved. The efficient plastic melting cracking flue gas desorption separation purification system has characteristics of simple structure, low energy consumption, complete separation effect, low discharged flue gas temperature, no harmful gas production, and environmental protection.

The invention discloses a zero-return-difference harmonic gear transmission device. The zero-return-difference harmonic gear transmission device comprises a rigid gear, a flexible gear and a wave generator; the wave generator is composed of a flexible bearing and an elastic cam; the flexible gear is located in the rigid gear; the upper end and the lower end of the flexible gear mesh with the upper end and the lower end of the rigid gear; the flexible bearing is located between the elastic cam and the flexible gear; the shape of the elastic cam is oval; a shaft hole is formed in the center of the elastic cam; and two structural holes used for forming thin walls of the cam at the two ends in the long axis direction of the elastic cam are formed in the positions, located on the two sides of the shaft hole, in the long axis direction of the elastic cam respectively. The zero-return-difference harmonic gear transmission device is simple in structure, reasonable in design and convenient to implement, backlash in circular teeth can be effectively eliminated, the transmission return difference can be effectively eliminated, in addition, the torsional rigidity can be guaranteed, the service life can be long, the application range can be wide, the practicability can be high, and the popularization and application values can be high.

The invention provides a sewage treatment system. The system comprises a pretreatment pond, an anaerobic hydrolysis pond and a compound biological filter pond. The pretreatment pond is provided with a sewage inlet and internally provided with a grid. The anaerobic hydrolysis pond is used for treating sewage treated by the pretreatment pond and is communicated with the compound biological filter pond through a water outlet pipe. The compound biological filter pond comprises a filter pond body, and an aeration machine and an aeration pipe. The filter pond body is filled with a first filter material layer and a second filter material layer from top to bottom, a drainage chamber is arranged between the second filter material layer and the bottom of the filter pond, and biological membranes are fixedly arranged on the first filter material layer and the second filter material layer respectively. The filter pond body is provided with a drainage port corresponding to the drainage chamber in position. The aeration pipe is connected with the aeration machine. Part of pipe section of the aeration pipe extends into the middle of the second filter material layer. Part of pipe section of the water outlet pipe extends into the first filter material layer. The sewage treatment system can adapt to rural sewage treatment and has the advantages of being stable in treatment effect, small in occupied area and the like.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for treating nitrobenzene wastewater through a technique of strengthening Fenton oxidation with microwaves. The method comprises the following steps of (1) adding a mixed reagent of H2O2 and Fe<2+> to nitrobenzene wastewater; (2) conveying mixed liquid into an industrial microwave oven for treatment; (3) performing aeration for oxidizing the mixed liquid; and (4) adjusting the pH of the mixed liquid, and collecting sludge. Through the adoption of the method, the problem that the nitrobenzene wastewater is difficult to treat at present is effectively solved.