32results about How to "Easy to optimize control" patented technology

The invention relates to the field of heterogenetic difficultly-welded material melting, and specifically relates to a titanium alloy and stainless steel electron beam welding filler material. The titanium alloy and stainless steel electron beam welding filler material is characterized in that the electron beam welding filler material between a titanium alloy plate and a stainless steel plate comprises a vanadium layer and a copper-chromium alloy layer, wherein the copper-chromium alloy layer is composed of the following elements in percentage by mass: 30-50% of chromium powder, 2-5% of nickel powder, 3-7% of titanium powder and the balance of copper powder. Through changing the compositions of the filler material, Ti and Fe elements can be effectively separated so as to avoid the formation of brittle intermetallic compounds in welds, therefore, the filler material has the advantages of high weld density, small brittleness, no pore and crack, and the like.

The invention relates to a method for rapidly representing sludge dewatering performance. The method comprises the following steps of: collecting 100ml of raw sludge or concentrated sludge; filtering with a filter membrane of 0.45mu m to obtain 10mL of sludge supernatant; measuring soluble organic carbon (DOC) of the supernatant; diluting the supernatant with distilled water until the DOC is less than 10mg/L; collecting a three-dimensional fluorescence spectrum (EEM) of the diluted supernatant; substituting the collected EEM spectrum into a database to analyze a parallel factor (PARAFAC) by using a DOMF1uor tool kit of Mat1ab 7.0 data processing software to determine a score of a component with excitation and transmission wavelength of (220,280)/350nm; and multiplying the score by a diluting multiple of a sample and substituting the product into a sludge dewatering performance judgment relational formula to represent the sludge dewatering performance. By the method, the sludge dewatering performance can be rapidly detected without chemical reagent, and the detection can be completed only through filtering, diluting and three-dimensional fluorescence spectrum; and the method can be applied to monitoring the dewatering performance of various types of sludge of sanitary sewage treatment factories, industrial sewage biological treatment factories and the like.

The invention discloses a production process of an aluminum profile for automobile impact energy absorbing components and a produced aluminum profile, relates to the technical field of aluminum and aluminum alloy extrusion machining and heat treatment. The production process comprises the following steps that an aluminum alloy ingot is subjected to uniform annealing treatment, extrusion and quenching treatment, tensile treatment and aging treatment in sequence; then, the aluminum alloy ingot is cooled to 490-525 DEG C after the uniform annealing treatment, and extrusion is carried out again; and the aging treatment includes first, natural aging treatment and then secondary artificial aging treatment, the natural aging treatment time is carried out for 30-60 h, the heat preservation temperature of a first artificial aging stage is 100-120 DEG C, the heat preservation time is 2-3.5 h, the heat preservation temperature of a second artificial aging stage is 150-170 DEG C, and the heat preservation time is 8-12 h. By reasonably designing parameters of extrusion process and heat treatment process, the production process can improve tensile mechanical properties simultaneously without reducing the plasticity, so that the aluminum profile has better compression performance.

The invention discloses a method for synchronously removing ammonia nitrogen and nitrate nitrogen in a continuous flow USB reactor through a short-range denitrification reinforcement DEAMOX technology, and belongs to the field of sewage treatment. The method comprises the steps that a USB reactor is inoculated with DEAMOX granule sludge, nitrate nitrogen is converted into nitrite nitrogen through an organic carbon source in fed water in short-range denitrification, ammonia nitrogen in the fed water is removed through the in-situ anaerobic ammonia oxidation effect, and the purpose of efficiently removing nitrogen is achieved by optimizing the mass concentration ratio of nitrate nitrogen to ammonia nitrogen in wastewater and controlling and adjusting the flow of organic carbon source in fed water. The problems that treatment of wastewater containing ammonia nitrogen and nitrate nitrogen is low in treating efficiency and high in energy consumption are effectively solved, aeration consumption in the aerobic stage is not needed, the external carbon source consumption is reduced, the residual sludge yield is low, and the follow-up treating cost is greatly reduced; in addition, the DEAMOX technology achieved in the continuous flow USB reactor has the advantages that the reaction speed is high, nitrate nitrogen produced in anaerobic ammonia oxidation process is removed in situ, and the total nitrogen removal rate and the denitrifying load are high.

The invention discloses a method and a device for restraining power-frequency ripple current. The device comprises an energy power supply, a bidirectional DC/DC (direct current/direct current) converter, a filter capacitor C3, an energy buffer capacitor C4 and a low-pass filter circuit, for sampling voltage, of the energy buffer capacitor, an energy power supply current detecting unit and a low-pass filter circuit of the detecting unit, a voltage reference Vref of C4, a current ripple restraining error amplifier EA1, a voltage control loop error amplifier EA2 of C4, a summing circuit of EA1 and EA2, and loads. By the device, restraining of energy power supply power-frequency ripple current is achieved under single-point current sampling, the defect that power-frequency ripples cannot be filtered effectively when large-capacity capacitors are used is overcome, and system cost is lowered while sampling lose is reduced and system efficiency is increased.

The invention discloses a device and method for synchronously treating high-concentration NO3--N waste water, sludge digestion liquid and municipal sewage. The NO3--N waste water and the sludge digestion liquid enter a first short-range denitrification reactor, NO3--N is converted into NO2--N through organic matter and an outer carbon source which are contained in the digestion liquid, and effluent containing NH4+-N and NO2--N enters an anaerobic ammonia oxidation reactor for denitrification; effluent containing nitrate nitrogen and the municipal sewage enter a second short-range denitrification reactor, NO3--N is converted into NO2--N in the presence of an organic carbon source in the municipal sewage, then the municipal sewage flow back to the anaerobic ammonia oxidation reactor, and NO2--N and NH4+-N are synchronously removed. The problems that when the high-concentration NO3--N waste water, the sludge digestion liquid and the municipal sewage are independently treated through a traditional method, the nitrogen removal efficiency is low, energy consumption is high, and the sludge output is high are solved, and according to the device and method, running cost I slow, the occupied area is small, the structure is simple, and optimal control is easy.

The invention discloses a vehicle engine starting system, which comprises a motor and a water pump for cooling the engine, wherein the motor comprises an output shaft; one end of the output shaft is connected with the water pump through a first clutch, and the other end of the output shaft is connected with a flywheel of the engine through a second clutch; and the output shaft of the motor can optionally rotate in one of two opposite directions so as to optionally start the engine or drive the water pump. According to the starting system, the motor is started after the engine is started, and serves as a driving motor for the water pump, and a motor can be eliminated, so that power can be saved, the cost can be reduced, and a vehicle cooling system is optimally controlled.

The invention provides a direct digital frequency synthesizer which comprises an accumulator used for accumulating input frequency control words FTW, a multi-channel phase-amplitude conversion module which comprises 2m data processing channels with equal-difference phases, a data selecting and outputting module and a digital to analog converter. In terms of the ith data processing channel, a bias phase FTW*i is added to an accumulation result of the frequency control words output by the accumulator, phase to amplitude conversion is performed on the result, and amplitude digital signals are output. The data selecting and outputting module is used for sequentially selecting the amplitude digital signals from the 2m data processing channels with the equal-difference phases and sending the amplitude digital signals into the follow-up digital to analog converter. The digital to analog converter is used for converting the amplitude digital signals output by the data selecting and outputting module into analog signals and outputting the analog signals. According to the direct digital frequency synthesizer, a manner of connecting the data processing channels in parallel is adopted, and phase-amplitude conversion of multiple channels is performed at the same time, so that the phase-amplitude conversion efficiency is improved, and conversion time is saved.

The invention relates to a hot alkaline recycling device of a calcining furnace and a using method of the device. The hot alkaline recycling device comprises a feeding tower, conveying machines, the calcining furnace, fuel gas, a preheater, an air compressor, a preheating fan, a fluidization fan, a stage separation device, washers, an electrostatic dust collector, a decontamination fan and an ash hopper. The stage separation device comprises a first-stage stage separation part, wherein a stage separation channel of the first-stage stage separation part is communicated with a top gas outlet of the calcining furnace, is further connected with the washers and is communicated with the calcining furnace; and the washers, a tray washer and a wet type electrostatic dust collector are sequentially communicated.

The invention discloses a vehicle engine starting system. The vehicle engine starting system comprises a motor, a water pump, a first clutch and a second clutch, wherein the water pump is used for cooling an engine. The motor comprises an output shaft, wherein one end of the output shaft is connected with the water pump through the first clutch, and the other end of the output shaft is connected with a flywheel of the engine through the second clutch. The first clutch is an electromagnetic clutch and comprises a driving piece and a driven piece, wherein the driving piece is in drive connection with the output shaft of the motor and can rotate along with the output shaft, the driven piece is in drive connection with the water pump so that the water pump can rotate along with the driven piece, the driving piece and the driven piece are respectively provided with teeth, the teeth of the driving piece can be meshed with the teeth of the driven piece, the driving piece can move between the first position and the second position, the driving piece is meshed with the driven piece when located in the first position so that the water pump can be driven to work, the driving piece is not meshed with the driven piece when located in the second position, the driving piece moves from the first position to the second position when the first clutch is powered on, and then the motor starts the engine.

The invention discloses a method for calculating the cutting length of grinding teeth of grinding equipment provided with straight tooth elements, and belongs to the technical field of mechanical design and manufacturing. Firstly, according to whether tooth type parameters of a straight tooth element change in the reference length direction or not and whether a grinding area is full of grinding teeth or not, a discrete formula or an integral formula for grinding tooth cut-off length calculation is selected; and then selecting a cut-off length calculation formula suitable for different devices for calculation according to the device types. The method is suitable for calculating the cut-off length of the grinding teeth of equidistant straight tooth grinding discs of various structures and various devices provided with straight tooth elements, and the cut-off length of the grinding teeth is reasonably calculated according to the physical definition of the cut-off length of the grinding teeth, so that the actual requirements are met; meanwhile, the method is clear in calculation process and convenient to use, parameterized calculation of the grinding tooth cut-off length can be achieved, the grinding tooth cut-off length serves as a key parameter of strength characterization of the pulping process, and an important theoretical basis is provided for design and improvement of pulping equipment and optimization control of the pulping process.

The invention discloses a household lead-acid energy storage apparatus. The household lead-acid energy storage apparatus comprises a solar cell, a lead-acid energy storage unit, a bidirectional control inverter, a remote controller and a household appliance load, wherein the external ends of the solar cell and the domestic appliance load are connected with the bidirectional control inverter separately through cables; the energy source end of the lead-acid energy storage unit is connected with the energy source control end of the bidirectional control inverter; charging-discharging DC/DC and DC/AC conversion modules are arranged in the bidirectional control inverter; the DC/DC input end is connected with the output end of the solar cell; a switch is arranged at the DC/AC input end; and special energy management software is arranged in the remote controller for realizing optimization and control of a man-machine interface conveniently. According to the household lead-acid energy storage apparatus, the capacity of the lead-acid energy storage unit is determined according to the household appliance load power; and therefore, the energy storage apparatus is easy to increase or decrease the capacity, convenient to install, rapid and convenient to operate, and particularly suitable for households in regions without electricity or regions with unstable power grid and electric energy.

The invention discloses an infrared optimal regeneration temperature device for a soot particle filter of a diesel engine. The infrared optimal regeneration temperature device comprises a filtering regeneration bin, connecting pipelines are installed at the two ends of the filtering regeneration bin through connecting structures, each connecting structure comprises a connecting shell, an inner cavity is formed in each connecting shell, threaded holes are formed in the upper side and the lower side of each inner cavity, threaded rods are arranged in the threaded holes, a low-voltage heating element is installed in a filter regeneration cavity and at one side of an air outlet, and an infrared radiator is installed on the filter regeneration cavity. The infrared optimal regeneration temperature device has the advantages that the device is simple in structure and convenient to use, the electric energy utilization rate of infrared radiation heating of soot can be greatly increased, the regeneration time is short, the regeneration process is easy to optimize and control, the indexes of regeneration efficiency, regeneration temperature distribution, regeneration time and regeneration energy consumption are optimized at the same time, and meanwhile, replacement of a filtering device and installation and fixation of the connecting pipelines are facilitated.

The invention provides a reactive voltage support capability evaluation method for a multi-partition power grid. The method mainly comprises the following steps: selecting key evaluation index data ofthe reactive voltage support capability of the multi-partition power grid; establishing a multi-partition power grid reactive voltage support capability evaluation index system; performing fuzzy analysis on the to-be-evaluated data by applying a fuzzy membership function and a dynamic time warping algorithm, and calculating the similarity between the to-be-evaluated data after fuzzy processing and the reference sample; and determining the reactive voltage support capability of the multi-partition power grid according to the similarity between the to-be-evaluated data and the reference data. According to the method, an index system capable of accurately representing the reactive voltage supporting capacity of the multi-partition power grid is formulated, the fuzzy theory and the dynamic time warping algorithm are applied to power grid partition reactive voltage supporting capacity evaluation, the power grid partition reactive supporting capacity can be accurately evaluated, and data support is provided for a provincial dispatching AVC system.

The invention discloses a method for evaluating the influence of an air preheater parallel two-section combined economizer on a boiler. The method comprises a method for evaluating the influence of two-section combined economizer commissioning and ceasing on boiler heat loss, a method for testing the heat exchange efficiency of a two-section combined economizer body, a method for evaluating the air leakage rate change of an air preheater by switching of a two-section combined economizer, and a method for evaluating the boiler exhaust smoke heat loss by the inlet smoke temperature change of a dust removal system in the operation state of the two-section combined economizer. Based on parameters such as boiler fuel and an air-smoke system, the method also selects a proper boiler system heat balance boundary, establishes a mathematical algorithm to carry out theoretical calculation on boiler heat loss and air leakage rate change of the air preheater and evaluate the influence of the two-section combined coal economizer on the performance of the boiler, and proposes a calculation method for the performance of the two-section combined coal economizer body and the influence of the smoke temperature change of the inlet of the dust removal system on the heat loss of the boiler in the commissioning state of the coal economizer, so that the operation optimization control of a coal-fired unit boiler of a transformation type is facilitated.