30 results about "Counter current" patented technology

The invention provides an anti-countercurrent control system and method based on transformer area flexible direct current interconnection, belongs to the technical field of power distribution network and new energy fusion control, and is suitable for direct current flexible interconnection and green energy collaborative utilization of heterogeneous transformer areas such as expressways, parks and urban and rural fusion areas. The system comprises an energy route management module, a transformer area capacity marking module, an energy monitoring module, a flexible direct current interconnection scheduling module, an anti-countercurrent module and an intelligent scheduling strategy module, and the control method comprises the steps of initializing the state of a transformer area, collecting data in real time, judging redundant power and scheduling the redundant power to the transformer area without power generation / grid connection capacity, and executing an anti-countercurrent strategy. And parameters and strategies are optimized based on an intelligent self-learning mechanism. The method achieves the preferential local consumption of new energy, prevents power countercurrent, guarantees the safety of a power grid, improves the adaptability and economical efficiency of the system, and is adaptive to a complex multi-source distributed energy scene.

The invention provides an anti-backflow system, and the system comprises a storage and charging integrated cabin which is used for storing electric energy; the storage and charging integrated cabin comprises a charging pile, an energy storage module, an intermediate relay and a switch which are electrically connected; the control module is configured to obtain static data and dynamic data; determining the output power of the energy storage module and the charging pile based on the static data and the dynamic data; acquiring power supply data; and based on the power supply data, adjusting the power supply condition among the energy storage module, the charging pile and the commercial power, and determining the opening or closing of a first switch node, a second switch node, a third switch node, a fourth switch node, a fifth switch node and an anti-countercurrent contactor, so as to solve the problems that the utilization rate of distributed energy is greatly reduced due to a current anti-countercurrent control scheme; and equipment loss is accelerated, the service life of equipment is shortened, and the operation and maintenance cost is increased.

The invention discloses a split-phase anti-countercurrent control method and system for a three-phase inverter. The method comprises the following steps: acquiring output power, load power and grid-connected power of each phase of the three-phase inverter in real time; for each phase, calculating the difference between the load power and the output power, if the difference is less than or equal to 0, judging that the phase has countercurrent, and performing corresponding split-phase control; and if the difference is greater than 0, judging that the phase has a countercurrent trend, and carrying out corresponding split-phase control.

The invention provides a pi-type thermoelectric conversion module having excellent cooling performance in which reverse flow of heat is suppressed. A thermoelectric conversion member (A) including a thermoelectric conversion element (M) and a heat countercurrent suppression member (B) including a thermoelectric conversion element (K) are alternately disposed at intervals between a first substrate having a first electrode and a second substrate having a second electrode, the first substrate and the second substrate facing each other. The thermoelectric conversion member A and the thermal countercurrent suppression member B are electrically connected in series via the first electrode on the first substrate and the second electrode on the second substrate, carriers of the thermoelectric conversion element M and the thermoelectric conversion element K are different from each other, one is a hole, and the other is an electron, and the thermoelectric conversion element M and the thermoelectric conversion element K are electrically connected in series via the first electrode on the first substrate and the second electrode on the second substrate. The total SA (m2) of the surface area of the thermoelectric conversion member (A) joined to the first electrode and the second electrode is larger than the total SB (m2) of the surface area of the thermal countercurrent suppression member (B) joined to the first electrode and the second electrode.

The invention discloses a high-efficiency multistage reverse flow type heat exchanger, which belongs to the technical field of heat exchangers and comprises a front cover and a rear cover, a plurality of heat exchange plates are arranged between the front cover and the rear cover, a circulating conveying mechanism is arranged on the other side of the front cover, and connecting mechanisms are arranged on the front side and the rear side of the front cover. One side of the rear cover is provided with a monitoring mechanism and a locking mechanism, the top of the monitoring mechanism is provided with a linkage mechanism, and the bottom of the monitoring mechanism is provided with a compensation mechanism; the monitoring mechanism comprises a sealing box, a sealing plate and a cross rod, and the linkage mechanism comprises a sealing cylinder, a piston disc, a counterweight plate and a touch button. The multi-point temperature sensor is used for accurately monitoring the inlet and outlet temperature difference change of cold and hot fluid, the heat exchange efficiency and the heat loss state are evaluated in real time, when it is detected that the outlet hot fluid temperature exceeds the expectation, the circulating conveying mechanism is immediately activated, and the hot fluid is guided into the circulating loop again for secondary heat exchange.

The utility model provides an anti-countercurrent photovoltaic power generation system. The anti-countercurrent photovoltaic power generation system comprises a photovoltaic assembly; the input end of the inverter is connected with the output end of the photovoltaic module; the alternating-current relay is provided with a first end, a second end and a control end, the first end is connected with the output end of the inverter, and the second end is connected with an electric load and a grid-connected device; and the anti-countercurrent controller is connected with the control end of the alternating-current relay and the electric load respectively, and is used for preventing countercurrent by disconnecting the alternating-current relay and / or reducing the power of the inverter under the condition that the grid-connected device obtains the electric energy output by the inverter. The utility model has the advantages that the grid-connected device can be monitored in real time to obtain the condition of the output electric energy of the inverter, and the countercurrent phenomenon can be effectively prevented by disconnecting the alternating-current relay and / or reducing the power of the inverter.

A method of absorbing a solvent from a gas stream may involve flowing a gas stream comprising air and a hydrocarbon through an absorption column in a countercurrent direction with a first lean absorbent liquid to absorb solvent out of the gas stream and generate a first conditioned gas stream and a first rich absorbent liquid. The method can then involve flowing the first conditioned gas stream through the absorption column in a co-current direction with a second lean absorbent liquid to absorb solvent out of the first conditioned gas stream and generate a second conditioned gas stream having a reduced concentration of the hydrocarbon than the first conditioned gas stream and a second rich absorbent liquid.

The utility model relates to an anti-countercurrent system and an anti-countercurrent photovoltaic power generation system. The countercurrent prevention system comprises at least one turn-off device; each turn-off device is connected with a single photovoltaic module, so that the adjacent photovoltaic modules are connected end to end through the turn-off devices to form a photovoltaic group string, and the photovoltaic group string is connected to the inverter; the turn-off device is configured to detect the current flow direction of the single photovoltaic module; under the condition that the current flows reversely, the single photovoltaic module enters a turn-off state so as to cut off the connection between the single photovoltaic module and the photovoltaic group string, and the single photovoltaic module is separated from a power transmission path from the photovoltaic group string to the inverter by a bypass; and under the condition that the current flow direction is a normal flow direction, entering a connected state so that the single photovoltaic modules are connected in series into the photovoltaic group string. According to the embodiment of the invention, current detection, reverse current blocking and automatic recovery can be automatically controlled by the system, manual intervention is not needed, and the maintenance cost of the power station is greatly reduced.

This invention relates to the field of workpiece cleaning technology, and discloses a continuous multi-stage countercurrent rinsing structure and a water washing system. The continuous multi-stage countercurrent rinsing structure includes an upper tank, a lower tank, and a drive pump. The upper tank contains a cleaning tank with a first end and a second end. Multiple cleaning zones are sequentially arranged along the length of the upper tank. The lower tank contains multiple dividing tanks corresponding to the cleaning zones, and the water in the cleaning zones is adapted to flow into the corresponding dividing tanks. From the second end to the first end, the liquid level in the dividing tanks decreases sequentially. The dividing tank near the second end has an inlet, and the dividing tank near the first end has an outlet. The water in the lower tank is adapted to flow from the second end towards the first end. The drive pump is used to extract water from the dividing tanks and transport it to the corresponding cleaning zones. This invention uses multiple dividing tanks to achieve different levels of water cleanliness in the dividing tanks, thereby reducing water discharge during workpiece cleaning.

The present invention discloses a CCD countercurrent washing flocculant uniform feeding system, including a settling tank, a forced dilution pump, a secondary flocculant tube with a feed channel extending into the pump outlet on the feed channel for injecting the diluent into the feed channel and mixing with the material; the flocculant tube is embedded between the forced dilution pump outlet and the feed channel; the number of secondary flocculant tubes is multiple. The CCD countercurrent washing flocculant uniform feeding system provided by the invention, shocks the flocculant tubes by inserting secondary flocculant tubes in each direction between the forced dilution pump outlet, and the injection level with kinetic energy impact.

The invention relates to the technical field of tea leaf extraction, in particular to a dynamic countercurrent ultrasonic enhancement device for extracting functional components of tea leaves, which comprises a treatment tank, a cover plate is arranged on the treatment tank, a tea leaf pretreatment assembly is arranged on the cover plate, and the tea leaf pretreatment assembly comprises a lifting tank used for extracting the functional components of the tea leaves, the cover plate is arranged at the top end of the lifting tank and used for sealing, and a through hole is formed in the center of the cover plate. When a rotating motor drives a grinding sheet to rotate, tea leaves located at the top end of a filter plate can be ground and crushed, and in the grinding and crushing process, due to the fact that the tea leaves are stirred by the grinding sheet, the crushed tea leaves can fall into a screening tank through holes in the filter plate in the stirring process to be subjected to secondary screening; the problem that the tea leaves are directly extracted after being ground and crushed into different particle sizes, and the extraction effect is poor is avoided.

The application relates to a laterite nickel ore hydrometallurgical pre-neutralization and real-time control system and method, the system includes: a pre-neutralization tank, a counter-current washing thickener, a detection tank, and a control device, the pre-neutralization tank is connected to the countercurrent washing thickener through the slurry discharge pipe, the detection tank is connected to the slurry discharge pipe and the washing inlet pipe of the counter-current washing thickener through the first detection pipe and the second detection pipe respectively, and the detection tank has a flocculant injector. The control device is used to obtain the flocculation and sedimentation effect signal in the detection tank and adjust the discharge flow rate of the slurry discharge pipe according to the flocculation and sedimentation effect signal. Compared with the prior technique, the system is provided with a detection tank between the pre-neutralization tank and the counter-current washing thickener, the pre-neutralized slurry and the washing water are input into the detection tank, and the flocculation and sedimentation effect is detected by using the control device, and the input flow rate of the pre-neutralized slurry is adjusted in time according to the sedimentation effect so that the pre-neutralized slurry maintains a good sedimentation effect when the countercurrent washing is carried out.

The present application discloses an enhanced thickening mechanism for counter-current decantation (CCD), comprising a cylinder and a stirring mechanism. The upper part of the cylinder is provided with a flocculant adding pipe, the top of the cylinder is open for a supernatant to overflow into the cylinder, and a through hole is formed in the middle of the cylinder for a turbid liquid to enter the cylinder through the through hole. The stirring mechanism is arranged inside the cylinder and is used for stirring the liquid in the cylinder, and a stirring end of the stirring mechanism is arranged at the lower middle part of the cylinder. In the enhanced thickening mechanism for CCD provided by the present application, the supernatant overflows into the cylinder, the turbid liquid enters the cylinder through the through hole in the middle of the cylinder, and a flocculant is added into the cylinder; and mixed flocculation of the supernatant, the turbid liquid and the flocculant is realized under the action of stirring, thereby improving the flocculation settling effect, and reducing the turbidity degree of the output supernatant.

The application relates to an automatic countercurrent cascade extraction device and a control method, which comprises at least n extraction tubes for realizing cascade extraction, which are arranged in S1 to Sn stages, and a liquid suction and stirring unit is arranged in each stage; the extraction tubes can be controlled to move to the next stage as a whole or be reset reversely; when moving to the next stage as a whole, the liquid suction and stirring unit injects the water-phase liquid sucked into the extraction tube of the upper stage after moving; at this time, the S(n+1) stage is a water-phase feeding stage, new water-phase liquid is added into the extraction tube of the S(n+1) stage, the S1 stage is a water-phase discharging stage, and a water-phase discharging receiving tube is arranged in the water-phase discharging stage; after being reset reversely, the next extraction operation is carried out. The application realizes automatic stirring mixing, phase separation and liquid separation of the cascade extraction operation, reduces the workload of manual operation, and eliminates misoperation.

The embodiment of the invention provides a photovoltaic system anti-countercurrent control method, device and equipment based on a single-phase inverter, and the method comprises the steps: obtaining the current-phase load power and inverter output power of each single-phase inverter, and determining the maximum allowable output power and power absorption margin of each single-phase inverter according to the current-phase load power and inverter output power of each single-phase inverter; broadcasting the current-phase load power, the inverter load power, the power absorption margin and the maximum allowable output power of each single-phase inverter to other single-phase inverters through a communication bus; when the current-phase load power of any single-phase inverter is changed, the power adjustment amount is dynamically allocated based on the power absorption margin broadcasted by other single-phase inverters which are not changed, the power adjustment amount is used for independently adjusting the actual inverter output power of each single-phase inverter, split-phase independent control is achieved by arranging the single-phase inverters, and the single-phase inverter can be used for independently adjusting the actual inverter output power of each single-phase inverter. A path of countercurrent caused by excess single-phase power is cut off, the single-phase inverter performs local detection and decision, and the response speed of the system is improved in combination with a communication bus.

The utility model relates to the technical field of load power regulation, and particularly discloses a device for simulating load power, which comprises an air switch, a three-phase transformer, three single-phase alternating-current ammeters, a potentiometer, a current transformer and a three-phase anti-reflux ammeter, the air switch is connected with the three-phase transformer, the three-phase transformer is connected with the three single-phase alternating-current ammeters, and the three single-phase alternating-current ammeters are connected with the potentiometer. Each single-phase alternating-current electric meter is connected with a potentiometer, and a current transformer collects the current value of the potentiometer and outputs a current signal to the three-phase anti-countercurrent electric meter. According to the utility model, under the condition that the load power change is not obvious, the condition that the load power change is relatively large can be simulated, and the load power variation can be simulated to be adjusted as required, so that the anti-reflux and demand protection function test of a new energy storage product becomes more convenient.

The invention discloses an anti-countercurrent system containing hard-soft control and adaptive to an electrodeless load. The anti-countercurrent system comprises a hardware control module, a software control module, an electrodeless load adaptive unit and a communication module, the hardware control module is used for collecting current and voltage signals in a power loop in real time and immediately triggering the quick breaking switch to act when detecting that reverse current exceeds a preset fixed threshold value; the software control module is in communication connection with the hardware control module, and the software control module is used for performing digital conversion and filtering processing on the acquired signal, adjusting a reverse current trigger threshold value based on a load power change rate fed back by the stepless load adaptation unit, and verifying a breaking switch action of the hardware control module; the stepless load adaptation unit is used for collecting the voltage fluctuation frequency and the current harmonic content of the load end, recognizing the type and the operation mode of the stepless load in combination with a preset load feature database, optimizing the control strategy according to the recognition result, and adjusting the hardware breaking delay time and the dynamic threshold value.

The invention relates to a countercurrent event determination method and a photovoltaic power generation system. The method is applied to a central gateway in the photovoltaic power generation system, the system further comprises a wireless electric meter, an inverter and at least one intelligent switch, the central gateway is connected with the wireless electric meter, the inverter and the at least one intelligent switch, and the intelligent switches are connected with the electrical equipment in the multiple electrical equipment in a one-to-one mode. The method comprises the following steps: acquiring electric meter power of a wireless electric meter, output power of an inverter and electric appliance power of corresponding electric appliance equipment detected by each intelligent switch; and when the electric meter power is smaller than the first preset power and the power sum between the electric appliance powers corresponding to the intelligent switches is smaller than the output power, determining that a countercurrent event exists. By adopting the method, the determination accuracy of the countercurrent event can be improved.

The present application relates to a method for measuring the concentration of a flocculant during CCD washing of lateritic nickel ore. The method comprises the following steps: determining the solid content C1 of a flocculant by means of a drying method, wherein the flocculant is polyacrylamide; adding the flocculant to industrial water, mixing same until uniform, leaving same to stand, taking the supernatant as a flocculant solution, measuring the water content C2 of the flocculant solution, obtaining the content C3 of total dissolved solids in the industrial water, and obtaining the flocculant content C4 of the flocculant solution on the basis of the water content and the content of the total dissolved solids; and obtaining the concentration of the flocculant on the basis of the solid content C1 of the flocculant and the flocculant content C4 of the flocculant solution. In the present application, the water content of the flocculant solution is measured, and then the flocculant content of the flocculant solution is obtained on the basis of the water content and the content of total dissolved solids; and the method is not affected by changes in the molecular weight of a polymer and the degree of hydrolysis, can accurately measure the mass concentration of the flocculant in the flocculant solution, has the characteristic of high accuracy, and meets the requirements of field measurement.

The invention relates to an anti-countercurrent control protection method and device for new energy power generation, and belongs to the technical field of new energy power generation. According to the invention, the problem of countercurrent of current flowing from a new energy system to a large power grid caused by instability of new energy power generation is solved. Cooperative control over a power generation unit, an energy storage unit and an electric vehicle charging and discharging unit in the new energy system is achieved by detecting the power and current size or direction of new energy power generation equipment, energy storage and electric vehicle charging and discharging in the new energy system, and anti-countercurrent protection of a large power grid is achieved under the condition that the influence on all parts of the new energy system is minimum. The operation stability of the new energy system is improved, and the negative influence of new energy system operation on a large power grid is reduced.

A two-circuit, counter-current fluid circulation heat exchanger module comprising a triply periodic minimum surface area (TPMS) heat exchange structure with preferred orientation Schwartz-D elementary patterns in the module's shell. The invention relates to a two-circuit fluid heat exchanger module (1) extending along a longitudinal axis (Z) and comprising: a shell with a square or rectangular cross-section; a heat exchange structure arranged in the shell, the structure being a triply periodic minimum surface area (TPMS) structure with Schwartz-D elementary patterns delimiting the two fluid circuits; the TPMS structure being oriented such that the interfaces of the Schwartz-D elementary patterns at the periphery of the structure are aligned with the longitudinal edges of the shell. Figure for the abstract: Fig. 3A

The invention discloses a pump body combination device for counter-current chromatography, and belongs to the technical field of general fluid working systems, the pump body combination device comprises a base, an L-shaped bracket, a motor, a pump body, an upper disc, a lower disc and a reagent bottle, the pump body is fixed on the base, one end of the L-shaped bracket is fixed on the base, the L-shaped bracket is vertically arranged, and the motor is fixed at the other end of the L-shaped bracket; an output shaft of the motor is in transmission connection with a rotating shaft, the rotating shaft is fixed to one end of a U-shaped frame, the other end of the U-shaped frame is fixed to the center of the bottom of the lower disc, a plurality of reagent bottles are evenly arranged on the upper disc in the circumferential direction, and a plurality of bottom cover sliding assemblies are further arranged on the upper disc. According to the invention, the motor drives the linkage structure of the rotating shaft and the push rod to cooperate with the collaborative design of the upper disc, the lower disc and the bottom cover sliding assembly, so that sequential opening and closing of a plurality of reagent bottles and automatic reagent switching are realized, and compared with a traditional manual reagent replacement mode, the device is high in automation degree, and human intervention is reduced.

The application provides a current compensation method of a three-phase inverter, which comprises the following steps: obtaining the counter-current power error of each phase of the three-phase inverter; for each phase of the three-phase inverter, taking the phase as a target phase, determining a compensation value adjustment amplitude according to the counter-current power error of the target phase; adjusting a preset compensation value according to the compensation value adjustment amplitude to obtain an adjusted compensation value; compensating the given current of the target phase according to the adjusted compensation value to obtain a compensated given current; and performing current control on the target phase according to the compensated given current. Through the above method, the power in and out of each grid-connected point of the three-phase inverter can be stabilized to approach 0 in the phase-independent anti-counter-current scene of unbalanced load.

Disclosed in the present application is a CCD counter-current washing flocculant addition and dispensing device, comprising a barrel, a discharge pipe, a valve, a stirring mechanism and a monitoring mechanism, wherein the barrel is provided with a feed port and a discharge port; a first inlet of the discharge pipe is connected to the discharge port; the valve is disposed on the discharge pipe; the stirring mechanism comprises a first electric motor and a stirring rod, the first electric motor being disposed at the top of the barrel, and an output shaft of the first electric motor being connected to the stirring rod; and the monitoring mechanism comprises a circulation pipe, a first pump and a flow meter, an inlet of the first pump being in communication with the barrel, an outlet of the first pump being in communication with an inlet of the circulation pipe, an outlet of the circulation pipe being in communication with the barrel, and the flow meter being disposed on the circulation pipe. In the present application, a flocculant solution is stirred by the stirring rod, such that the flocculant is kept in a suspended state; by providing the circulation pipe, the flocculant solution can circulate, thereby reducing the possibility of flocculant precipitation and agglomeration; moreover, the flow meter can continuously monitor the flow rate, and coagulation and precipitation of the flocculant can be discovered in a timely manner.

The utility model relates to an uninterruptible power supply system of a power system, which comprises a first power supply cabinet, a second power supply cabinet, an output switch circuit and a feeder line cabinet, and is characterized in that the output switch circuit comprises an anti-countercurrent diode module; the first input end of the first power supply cabinet is electrically connected with a first power supply, the second input end of the first power supply cabinet is electrically connected with a second power supply, and the output end of the first power supply cabinet is electrically connected with the first input end of the anti-countercurrent diode module; the input end of the second power supply cabinet is electrically connected with a third power supply, and the output end of the second power supply cabinet is electrically connected with the second input end of the anti-countercurrent diode module; and the output end of the anti-countercurrent diode module is electrically connected with the feeder line cabinet. Through the arrangement, the uninterruptible power supply system can cope with different working conditions, and meanwhile, the anti-reflux diode module is arranged, so that the damage of power reflux to the uninterruptible power supply system is avoided, and the stability and the reliability of the uninterruptible power supply system are improved.

The embodiment of the invention discloses an anti-countercurrent method and an electric power system, and is used for the technical field of electric power safety. The method provided by the embodiment of the invention comprises the steps of reading equipment output power of power supply equipment and electric meter monitoring power of the grid-connected point electric meter in a normal communication state of the grid-connected point electric meter, and performing power return-to-zero processing on the equipment output power and the electric meter monitoring power respectively to obtain target equipment output power and target electric meter monitoring power; obtaining first power corresponding to power supply equipment and second power corresponding to a public power grid through target equipment output power and target electric meter monitoring power according to whether electric meter communication of the grid-connected point is in a normal state and a countercurrent state, and obtaining third power corresponding to a load based on the first power and the second power; and performing anti-countercurrent power balancing operation based on the specific working conditions of the power supply equipment, the public power grid and the load reflected by the first power, the second power and the third power.

This invention relates to the field of PCB manufacturing technology, and more particularly to an automated intelligent horizontal copper plating and via-forming method for PCBs. The method sequentially executes cleaning, acid pickling, charge control, wetting enhancement, counter-current rinsing, pre-immersion, and chemical copper plating steps, and achieves closed-loop process control through intelligent detection and diagnosis. Specifically, by detecting the copper layer characteristics of the vias after chemical copper plating, the method calculates the percentage of copper plating area per unit area and its overall area percentage to determine the pass / fail status of the via-forming process. When the process fails, the variance of the data for each via is further analyzed to pinpoint the cause of the failure. This invention, by introducing quantitative evaluation indicators and a cause diagnosis mechanism based on data variance, achieves intelligent monitoring and precise self-adjustment of the copper plating and via-forming process, significantly improving the uniformity and reliability of via metallization.

A thyristor-based dc solid state circuit breaker (SSCB) named Y-type includes a new complementary commutation circuit including a capacitor-capacitor pair, which features three advantages. First, a fast commutation is achieved using a countercurrent pulse injection by the capacitor-capacitor pair structure. Second, metal-oxide varistors (MOVs) are disconnected from the power line when SSCB is OFF, which solves the reliability issue due to the MOV degradation and enhances the voltage utilization rate of the main switch. Third, benefiting from the capacitor-capacitor pair structure, reliable reclosing and rebreaking are obtained for practical applications.