61results about How to "Low calorific value" patented technology

The application provides a non-liquid-cooled heavy-current connector, relates to the technical field of electric connectors, and solves the problem of small charging power of the existing liquid-cooled charging connector. The device comprises a socket assembly and a plug assembly which are matched with each other, and at least two groups of power terminals are arranged on the socket assembly and the plug assembly. Each group of power terminals comprises a positive power terminal and a negative power terminal. The cross-sectional area of the power terminal is not less than 120 mm2, and the power terminal can bear a working current of not less than 300 A. The application adopts the setting mode of multiple groups of power terminals to reduce the heat generation of each power terminal by several times, so that the liquid-cooled charging connector can also realize high-power charging.

The application discloses a hot water boiler based on a porous medium burner, which comprises a hot water boiler shell, wherein the hot water boiler shell comprises a boiler barrel, the outer side of the boiler barrel is provided with a water jacket for storing water, and the inside of the boiler barrel is fixedly provided with a porous medium burner; the inner cavity of the porous medium burner comprises a combustion reaction zone, the two ends of the combustion reaction zone are provided with anti-backfire areas, the two ends of the porous medium burner are provided with mixed gas inlets, the mixed gas inlets are connected with mixed gas input pipelines, one end of the mixed gas input pipelines extends out of the hot water boiler shell and is connected with a gas fuel supply device; the porous medium burner is internally provided with an ignition device, mixed gas flows into the combustion reaction zone from the mixed gas input pipelines and is ignited by the ignition device, heat generated by combustion of the mixed gas heats water in the water jacket, flue gas is discharged from the combustion reaction zone through the pores of the porous medium of the porous medium burner and is discharged into a flue gas treatment mechanism connected with the hot water boiler shell, the gas utilization rate is improved, and the heat diffusion speed is slowed down.

This invention discloses an optimized method for stator and rotor welding processes in the field of motor manufacturing, comprising the following steps: improving welding quality through pretreatment, coating with modified composite materials, and optimizing laser welding parameters. During pretreatment, the stator and rotor areas to be welded are sanded with 800-1200 grit sandpaper, followed by ultrasonic cleaning with acetone or alcohol for 10-15 minutes to achieve a surface roughness Ra ≤ 1.6 μm; a 0.1-0.3 mm thick layer of modified composite material is coated onto one surface and dried at 80-120°C for 1-2 hours; laser welding is employed, with the molten pool temperature monitored at 1800-2200°C during welding; immediately after welding, the welded parts are placed in a holding furnace at 200-300°C for slow cooling for 2-4 hours, and then cooled to room temperature at a rate of 5-10°C / min. This method effectively improves the strength, toughness, and crack resistance of the welded joint, reduces the heat-affected zone, and minimizes deformation.

The present application relates to the technical field of metallurgical production, in particular to a method for reducing the mixing amount of coke oven gas in lime double-D kiln by oxygen-enriched combustion, specifically, oxygen injection guns and oxygen-enriched valve groups are installed in the air pipeline of the lime double-D kiln to control the oxygen flow, the lime double-D kiln is started, mixed gas containing coke oven gas and converter gas is introduced, the oxygen-enriched valve groups are then started, the oxygen enrichment degree is set from 1% and gradually increased, and the highest oxygen enrichment degree does not exceed 9%, the air-fuel ratio and the excess air coefficient are simultaneously reduced, and the mixed gas flow is reduced. By the method of oxygen-enriched combustion, the oxygen content in the calcination combustion-supporting air is increased, the combustion efficiency is improved, the combustion temperature is optimized, the air demand and the combustion product generation amount are reduced, the heat taken away by the flue gas is reduced, thereby the heat loss of exhaust gas can be reduced, the theoretical combustion temperature and the furnace gas radiation capacity can be improved, and the energy consumption can be greatly reduced.

The application discloses an energy-saving LED display screen with a reverse common cathode and a driving method thereof, and belongs to the technical field of LED display. The application aims at the problem that the single voltage power supply of the traditional common anode LED display screen leads to high power consumption and serious heat generation of the first display content LED, and adopts a reverse common cathode structure of dynamic anode voltage switching + cathode time-sharing gating: the ICND2018 row driving IC provides switchable double voltages for the common anode of the LED, outputs 2.6~2.8V low voltage when the first display content is displayed, and outputs 3.6~3.8V standard voltage when the second display content and the third display content are displayed; three pieces of ICND1065L16 channel constant current sink column driving IC are matched to independently control the three-color cathodes of the first display content, the second display content and the third display content, and precise power supply of color separation is realized. Under the premise of being fully compatible with the existing SMDTOP three-in-one common anode lamp beads, the first display content LED loop voltage difference is reduced from 1.8V to 0.8V, and the power consumption of the single first display content lamp is reduced by about 55%.

The application discloses a multiple ignition protection method and an ignition protection circuit based on HCS08SG. The method is used in an ignition module of an automobile engine and comprises the following steps: S1, collecting an ECU driving signal of a signal input end and outputting the signal to an HCS08SG single-chip microcomputer after processing; S2, determining whether multiple ignition needs to be started by using the HCS08SG single-chip microcomputer; if the multiple ignition needs to be started, the HCS08SG single-chip microcomputer controls a power switch of the ignition module to start the multiple ignition; S3, detecting the frequency of the opening and closing of the power switch of the ignition module by using the HCS08SG single-chip microcomputer, and accumulating and calculating the ignition times in a multiple ignition cycle time; and S4, comparing the accumulated and calculated ignition times with a set threshold value by using the HCS08SG single-chip microcomputer, and controlling the power switch of the ignition module to close the multiple ignition after the set threshold value is reached. The application can accurately control the multiple ignition times of the ignition module, reduce the heat quantity of the multiple ignition module, prolong the service life of the multiple ignition module, and reduce the failure rate of the ignition coil.

This utility model relates to a stator-rotor assembly and a powder-liquid mixing device. A stator-rotor assembly includes at least one stator and at least one rotor, the rotor rotating relative to the stator to shear the material flowing through the assembly. The structure of a single stator includes a first disc with several flow holes along the circumference on its end face for material flow. The structure of a single rotor includes a second disc with several notches along the circumference on its end face for material flow; each notch is hollowed out, thus forming independent blades between adjacent notches. By configuring the stator and rotor, the shearing consistency of the stator-rotor assembly on the material can be improved, thereby increasing the dispersion efficiency; simultaneously, the small overlap area between the stator and rotor reduces the heat generation of the stator-rotor assembly.

The application discloses a pre-charging circuit and a control method thereof, a battery management system and an electric vehicle. The circuit comprises a capacitor, a power battery, a pre-charging inductor, a pre-charging switch and a switch control module. The positive pole of the power battery is connected with the first end of the capacitor. The first end of the pre-charging inductor is connected with the first end of the capacitor, and the second end of the pre-charging inductor is connected with the second end of the capacitor. The pre-charging switch is connected in series between the negative pole of the power battery and the first end of the pre-charging inductor. The input end of the switch control module is connected with the negative pole of the power battery, and the output end of the switch control module is connected with the pre-charging switch. The switch control module is used for acquiring a circuit signal in the pre-charging circuit, comparing the circuit signal with a reference signal to obtain a voltage value comparison result, and controlling the on-off of the pre-charging switch according to the voltage value comparison result and a clock signal. According to the embodiment provided in the application, the pre-charging efficiency, the safety and the energy saving of the battery system can be improved.

This invention provides a low-cost and environmentally friendly papermaking pulping process, comprising the following steps: S1. Pretreatment of papermaking fiber plant raw materials. S2. Oxy-alkali cooking: The pretreated papermaking fiber plant raw materials are mixed with an aqueous sodium carbonate solution, and cooked for 0.5–5 hours using oxygen as an oxidant. Then, sodium hydroxide is added, and cooking continues for 0.3–2 hours. Finally, the pulp and black liquor are separated by pressing. S3. Black liquor treatment: The black liquor is mixed with fiber waste, pressed, and burned as biomass fuel. S4. Recovery and causticization. This papermaking pulping process uses sodium carbonate and a small amount of sodium hydroxide for staged oxy-alkali pulping, and the generated black liquor is mixed with fiber waste and burned to recover sodium carbonate and heat, reducing the causticization rate and pulping costs.

The invention discloses a pumping ring structure-based active optical fiber with high pumping conversion efficiency and an amplifier structure, and relates to the field of active optical fibers and optical fiber amplifiers, the pumping ring structure-based active optical fiber comprises a layered structure which is sequentially arranged from inside to outside, and the layered structure comprises a fiber core, a pumping ring structure, a quartz cladding and a coating layer, the optical fiber is located at the geometric center of the active fiber; the pumping ring structure is arranged around the fiber core and is used for guiding and converging pumping light to gather towards a fiber core area, the pumping ring structure is composed of one or more layers of concentric annular modulation areas, and the refractive indexes of all the layers of modulation areas are gradually increased layer by layer from outside to inside in the radial direction; according to the active optical fiber and amplifier structure, one or more layers of concentric pumping rings with refractive indexes gradually increased layer by layer from outside to inside are arranged in the cladding, and the concentration degree and energy density of pumping light towards a fiber core area can be remarkably improved to a certain extent by utilizing the guiding effect of refractive index gradients on a pumping light propagation path; therefore, higher pumping absorption efficiency and gain performance are realized.

The application discloses a mine-used four-way explosion-proof and intrinsic safety type direct-current power supply with a communication function, which comprises five non-intrinsically safe AC_DC modules and DC intrinsic safety circuits connected with the non-intrinsically safe AC_DC modules, and is recorded as non-intrinsically safe AC_DC module 0-non-intrinsically safe AC_DC module 4. The non-intrinsically safe AC_DC module 0 is responsible for power supply of a power management module. Two power supplies of the non-intrinsically safe AC_DC module 1 and the non-intrinsically safe AC_DC module 2 are converged through the power management module to form a double-path power supply A. Two power supplies of the non-intrinsically safe AC_DC module 3 and the non-intrinsically safe AC_DC module 4 are converged through the power management module to form a double-path power supply B. The double-path power supply A is fused with a CAN bus and a vehicle-mounted Ethernet unit into an 8-core composite cable. The double-path power supply B is fused with another CAN bus and the vehicle-mounted Ethernet unit into an 8-core composite cable. The power supply internally adopts a four-way power supply parallel mode, can realize power supply with a larger power, has a higher power conversion efficiency, has a lower heat generation, and improves the safety of the power supply system.

The utility model discloses a solenoid for electromagnetic valve, including support body and the skeleton of setting in support body inside, the support body includes U type frame and sets up the apron of U type frame open end, still include the electricity incoming subassembly of clamping in one side of U type frame, the electricity incoming subassembly includes circuit board and mounting bracket. The utility model adopts modularization design, and the circuit board and mounting bracket are integrated into electricity incoming subassembly, make from production to operation and maintenance whole process realized optimization: first, the assembly link is simplified operating procedure because of part integration, reduces the cumbersome process of scattered assembly, thereby greatly improves the assembly efficiency, second, when the later maintenance replacement, modularization design makes no need to the coil overall to be disassembled, only needs to carry out single operation to the electricity incoming subassembly, not only simplifies the maintenance process, reduces the maintenance threshold, can also complete the replacement fast, effectively reduces the downtime of equipment because of the failure.

The application discloses a charging box, a charging device and an electronic device assembly. The charging box comprises a box body, a magnetic element, a driving element and a first coil. The driving element is arranged in the box body and is used for driving the magnetic element to move. The magnetic element is movably arranged at a first position of the box body and is used for driving an electronic device to move relative to the charging box. The first coil is arranged in the box body and is used for charging the charging box or the electronic device. The first coil has a first distance from the magnetic element. When the first coil charges the charging box or the electronic device, the driving element drives the magnetic element to move to a second position of the box body. When the magnetic element is at the second position, the magnetic element has a second distance from the first coil, and the second distance is greater than the first distance.

The invention discloses a fluorocarbon bond breakage catalyst, a lithium fluoride carbon battery electrolyte and a lithium fluoride carbon battery, and belongs to the field of lithium batteries. The fluorocarbon bond cleavage catalyst only comprises a compound of dimethyl aluminum chloride (C2H6AlCl). The fluorocarbon bond breakage catalyst can catalyze C-F bond breakage, so that a large number of LiF crystal nucleuses are pre-generated in electrolyte near the CFx surface before the battery is discharged, the crystallization and growth processes of LiF crystals in the discharge process of the Li / CFx battery are changed, the LiF crystallization process with huge heat productivity is converted into the LiF crystal growth process with small heat productivity, and the LiF / CFx battery has a good heat dissipation effect. And finally, the purpose of reducing heat produced in the battery discharging process is achieved.

This application discloses a current source input converter based on a bidirectional Zener diode array; relating to the power supply field, it solves the problems of low efficiency, lack of redundancy protection, and high heat dissipation pressure of current source input converters. The bidirectional Zener diode array, in conjunction with a full-bridge rectifier circuit, enables the converter to adapt to any polarity of the input current. Regardless of the polarity of the constant current source, it can clamp and rectify it into a unidirectional DC bus voltage. The input terminals of the first DC / DC converter circuit and the second DC / DC converter circuit are connected in parallel, and their output terminals are also connected in parallel, forming a hot backup architecture with parallel input and parallel output. When one DC / DC converter circuit fails and stops working, the other continues to supply power to the load. The voltage regulation circuit detects the DC bus voltage and controls the conduction of the bypass current circuit to bypass excess current to ground. The bypass circuit diverts excess current, reducing the current flowing through the bidirectional Zener diode array and thus reducing the power consumption of the Zener diode array.

The invention discloses a stator assembly, a motor, an integrated joint and a robot, and relates to the technical field of motors. The invention provides a stator assembly, which comprises a stator core, the stator core comprises an annular part and a plurality of stator teeth, the stator teeth extend along the radial direction of the annular part, two adjacent edges of two adjacent stator teeth are parallel, and a stator slot is formed between two adjacent stator teeth; the stator assembly further comprises a stator winding, the stator winding is formed by winding flat wires in a lap mode, the stator winding is arranged outside any stator tooth in a sleeving mode, and the flat wires are partially contained in the stator grooves. According to the stator assembly, the slot fullness rate of the stator slots of the stator assembly can be improved, so that the resistance and loss of the motor are reduced, and the heating value of the motor is reduced.

The utility model discloses an auxiliary device suitable for heavy-load hard rail transmission, which comprises a bottom rolling body and side rolling bodies, the bottom rolling body is fixedly arranged on a plastic pasting surface, and the side rolling bodies are fixedly arranged on two side surfaces of a hard rail contact surface; the bottom rolling body is fixedly mounted on a rolling body mounting plate, and a mounting plate gasket is arranged at the bottom of the rolling body mounting plate; the side face rolling body is fixedly installed on the rolling body side brake iron, and the rolling body side brake iron is fixedly installed on the brake iron base. The auxiliary device is of a hard rail auxiliary transmission structure combining the rolling body and the plastic pasting face, the linear precision in the high-speed operation process can be improved, the heating value of the plastic pasting face is effectively reduced, the maintenance requirement of a traditional hard rail is lowered, the service life of the plastic pasting face of the hard rail is prolonged, and the problem of the creeping phenomenon in the low-speed operation process is solved.

The utility model relates to a wireless remote control device for portable electric lift, including transmitting part and receiving part, CPU processor I in transmitting part is connected button and indicating lamp module, wireless communication module I and boost module respectively, boost module connects battery, CPU processor II in receiving part is connected isolation power module, motor drive and protection module, wireless communication module II and state and trouble display module respectively, motor drive and protection module are connected with the brushless DC motor in portable electric lift, isolation power module connects lithium cell, and all are equipped with built -in PCB antenna in wireless communication module I and wireless module II, and state and trouble display module connects 2.4 inch OLED display screen. The utility model has the beneficial effect that: to brushless DC motor adopts FOC magnetic field orientation control form, and control precision is high, and the anti -interference ability is strong, can work stably in 1000KV strong electric field.

This utility model discloses a dual MOSFET drive motor forward and reverse rotation circuit, comprising: a signal input module, a signal processing module, a drive module, and a motor module; the output terminal of the signal input module is connected to the input terminal of the signal processing module, the output terminal of the signal processing module is connected to the input terminal of the drive module, and the output terminal of the drive module is connected to the input terminal of the motor module. Utilizing the low internal resistance of the MOSFETs, energy loss during current transmission is greatly reduced, resulting in a significant decrease in power consumption. Furthermore, the low temperature drift coefficient of the MOSFETs makes their performance more stable and reliable, with minimal impact from temperature fluctuations, reducing equipment failures caused by temperature changes, effectively extending the equipment's service life and maintenance cycle, and providing strong support for the efficient and stable operation of the galvanometer drive.

The invention relates to the technical field of shutter driving, in particular to an SMA alloy wire shutter driving structure which comprises a driving shaft arranged around a shutter window, the driving shaft is used for driving a shutter blade to move, and the SMA alloy wire shutter driving structure is characterized by being provided with a first fixing point and a first SMA alloy wire, one end of the first SMA alloy wire is connected with the first fixing point, and the other end of the first SMA alloy wire is connected with the second fixing point. And the other end of the first SMA alloy wire is connected with the driving shaft. A first SMA alloy wire is adopted as a driving element, one end of the first SMA alloy wire is fixed to a first fixing point, and the other end of the first SMA alloy wire is connected to a driving shaft. The first SMA alloy wire can be controllably contracted and expanded by controlling the power-on and power-off of the first SMA alloy wire, so that the shutter blade is accurately driven to be opened and closed. The working stability of the shutter is improved, and the calorific value of the system is effectively reduced.

The utility model relates to key switch technical field discloses a kind of short magnetic shaft key structure, the short magnetic shaft key structure provided by the utility model, including base, one side is provided with PCB board, and magnetic sensing element is arranged on PCB board;Upper cover, pivot core is movably arranged, and elastic member is arranged between pivot core and base, and magnetic piece is arranged on pivot core, and magnetic piece is oppositely arranged with magnetic sensing element;Guide structure, it is arranged at the outside of elastic member, and guide structure extends to pivot core inside;And switch assembly, it is between base and pivot core, and with PCB board electric connection, pivot core is pressed down and rebound, and switch assembly controls the switching of the working state and non-working state of magnetic sensing element;The magnetic shaft keyboard provided by the utility model includes the short magnetic shaft key structure described above.The utility model plays the technical effect of reducing the energy consumption of short magnetic shaft key, reducing its temperature, and being conducive to prolonging the service life of short magnetic shaft key.

The utility model relates to the technical field related to flow control, in particular to an electromagnetic valve and an oxygen generator. The electromagnetic valve comprises a valve body and a plurality of flow control mechanisms. The valve body is provided with an inlet, an outlet and a plurality of communication ports. Each flow control mechanism is used for controlling one of the corresponding communication ports to be communicated with the inlet or the outlet; each flow control mechanism comprises a winding coil, an iron core assembly and an ejector rod, the ejector rods are arranged in the valve body in a penetrating mode and fixedly connected with the movable iron cores, and when the winding coils are powered on, the movable iron cores can be driven to drive the ejector rods to move in the first direction, so that the corresponding communicating ports are switched from communicating with the inlets to communicating with the outlets; when the ejector rod moves in the first direction, a first acting force generated by a medium guided in from the inlet on the ejector rod in a second direction opposite to the first direction is equal to a second acting force generated by the medium on the ejector rod in the first direction. According to the electromagnetic valve, control over movement of the ejector rod in the first direction can be achieved through the low-power winding coil under the high-pressure working condition.

This invention discloses a magnetic levitation conveying device and speed control method. The device includes: a mounting base; a carrier base with a connecting block movably connected to the mounting base at its bottom; a motor mounted on the mounting base and a magnet mounted on the carrier base for driving the carrier base to move relative to the mounting base; and slidingly fitted first / second guide portions, one of which is mounted on the mounting base and the other on the carrier base, for restricting the carrier base to move along a set track. The mounting base includes a base plate, a support block, and support side plates, with the support side plates located on both sides of the base plate in a first direction. First rotating wheels are mounted on both sides of the carrier base, abutting against and movable relative to their respective support side plates. A second rotating wheel is mounted on the connecting block and can move on the upper surface of the support block. This invention can reduce the occurrence of detachment between the suspended tray and the guide rail, ensuring the safe and stable operation of the magnetic levitation conveying device.

The utility model relates to a person ascending vehicle which comprises a portal frame system and a hydraulic control system, the hydraulic system comprises a hydraulic control valve set connected into a hydraulic oil way, and the hydraulic control valve set comprises a proportional direction valve and a flow priority valve; when the proportional direction valve is small in opening degree, the flow priority valve works at the left position, a lifting action oil way of the vehicle is conducted, and an auxiliary action oil way is cut off; when the proportional direction valve is in a large opening degree, the flow priority valve works at the right position, an auxiliary action oil way of the vehicle is conducted, and a lifting action oil way is cut off; and a plurality of hydraulic control valves in the hydraulic control valve group are arranged on a valve group mounting seat in a centralized manner. The scheme has the advantages of reducing energy consumption, reducing system heating and improving system stability.

The invention relates to the technical field of frequency converters, in particular to a dustproof cooling device of a crane frequency converter. In the using process of an existing device, circulating ventilation and heat dissipation can not be conveniently conducted on a frequency converter, and the heat dissipation effect of a heat dissipation plate is reduced. The device comprises a shell, a sealing door is rotationally connected to the shell, a controller is fixedly connected to the bottom of the inner wall of the shell, and two one-way valves are fixedly connected to the lower portion of the shell. An electric push rod drives a push frame to move up and down in a reciprocating mode, the push frame moves upwards to push a sealing plate to slide, the sealing plate slides to push a movable rod frame to slide, the movable rod frame slides to drive a rotating frame to rotate, and then a filter screen slides to block a ventilation opening of a fan; and the fault of the controller caused by dust invading into the shell can be comprehensively reduced.

The utility model provides a novel tandem type water-cooled resonant capacitor, comprising capacitor cores and copper electrodes, the upper and lower end faces of the capacitor cores are respectively welded with one copper electrode, the whole capacitor cores are cylindrical, the number of the capacitor cores is two, and the capacitor cores comprise a first copper foil, a second copper foil, a polypropylene optical film and a metallized polypropylene film. The first copper foil and the second copper foil are used as extraction electrodes, the metallized layer of the metallized polypropylene film is used as an intermediate electrode, the two layers of electrodes are separated by the metallized film, a polypropylene medium is arranged in a gap between the first copper foil and the second copper foil, and the capacitor core is formed by winding the copper foil, the polypropylene optical film and the metallized polypropylene film around the hard core rod. Spraying metal layers at two ends, welding the core and the copper electrodes together by using low-temperature soldering tin, and encapsulating a sealing material around the core; the copper electrode is provided with six water through holes, and the six holes are communicated through a connecting pipe to conduct internal water circulation. The power output and reliability of the capacitor are greatly improved, and the service life of the capacitor is greatly prolonged.

The utility model relates to line lamp technical field especially line lamp without particle luminous, its technical scheme includes the lamp body, the inside fixed mounting of lamp body has LED integrated circuit board, the inside fixed mounting of lamp body has optical acrylic diffusion plate, LED integrated circuit board sets up optical acrylic diffusion plate's below, the inside fixed mounting of lamp body has optical acrylic stick, the bottom fixed mounting of lamp body has the integrated junction box of outgoing line, the integrated junction box of outgoing line is fixedly installed with cable female head and cable male head. The utility model discloses through optical acrylic diffusion plate and optical acrylic stick, make lamp luminous even, reach the light -emitting effect of no particle, no spot, when two adjacent lamps are connected as a whole, can transmit current through the integrated junction box of outgoing line, compared with traditional internal circuit board of lamp conveying current, can reduce the heat output of circuit board, effectively improved the service life of LED line lamp.

The application belongs to the technical field of low-voltage electrical apparatus, and particularly provides a low-power under-voltage release based on high-end NMOS driving, which comprises a surge absorption circuit, a rectification circuit, a DC / DC circuit, a voltage detection and release driving circuit, a starting time control circuit, a starting current control circuit, a release control circuit and a release coil; the rectification circuit is connected with the surge absorption circuit, the DC / DC circuit and the starting current control circuit respectively; the DC / DC circuit is further connected with the voltage detection and release driving circuit and the starting time control circuit respectively; the voltage detection and release driving circuit is further connected with the release control circuit; the release control circuit, the starting time control circuit and the starting current control circuit are sequentially connected; and the release control circuit and the starting current control circuit are both connected with the release coil. The low-power under-voltage release based on high-end NMOS driving has the advantages of low power consumption, long service life, stable action voltage and the like.

The utility model relates to a low-temperature methanol washing system for recycling effective gas in 0.8 MPa sulfur-rich methanol. The low-temperature methanol washing system comprises a 0.4 MPa sulfur-rich methanol flash tank and a second compressor, the liquid inlet end of the 0.4 MPa sulfur-rich methanol flash tank is communicated with the liquid outlet end of the 0.8 MPa carbon-rich methanol flash tank of the low-temperature methanol washing system body, the gas outlet end of the 0.4 MPa sulfur-rich methanol flash tank is communicated with the inlet end of the second compressor, and the outlet end of the second compressor is communicated with the raw gas inlet end of the main washing tower of the low-temperature methanol washing system body; and the liquid outlet end of the 0.4 MPa sulfur-rich methanol flash tank is communicated with the liquid inlet end of the 0.2 MPa flash tower of the low-temperature methanol washing system body. The system improves the effective gas recovery rate of the low-temperature methanol washing process, reduces the comprehensive energy consumption of a production device, and improves the economical efficiency of the low-temperature methanol washing device; the overtemperature risk of a subsequent heat accumulating type oxidation device is reduced; and meanwhile, the flash evaporation load of a 0.2 MPa flash evaporation tower is reduced, and the flash evaporation effect is improved, so that the load of a subsequent methanol regeneration system is reduced.

The utility model relates to a semi -automatic probe contact test machine belongs to chip production test technical field, in order to solve the effective contact area between probe end and chip pad in long -term continuous use process is reduced significantly, the contact resistance between both is increased sharply and stability is poor, forms local concentrated heating, leads to the problem that the precision circuit, metal connection and semiconductor structure in chip interior are damaged by heat, the invention includes test platform and the mobile piece of installation in test platform one side, one side of mobile piece is provided with buffer seat, and the probe platform is installed in one side of buffer seat, the utility model is through setting up memory alloy in the electrically conductive cylinder, utilizes the characteristics that probe wear leads to contact resistance increase, local concentrated heating, makes memory alloy heat phase change and pulls the probe automatic retraction, and the contact of probe and chip pad is disconnected quickly, avoids the chip internal circuit and melts pad from high temperature burnout fundamentally, significantly improves the safety and reliability of chip test process.