56 results about "Counter current" patented technology

Procedure for controlling a counter-current system 3 for swimming pools comprising the following steps: a. Providing a swimming pool 1 with a counter-current system 3 for generating a flow 31 of a predetermined flow velocity v in the swimming pool 1, a sensor 4, 5; 6 for generating a control signal depending on the position of a person swimming in the pool 21, 22, 23 and a control unit 7 which, based on the control signal, sets the flow velocity v generated by the counter-current system 3; b. Determining the position of a person swimming in the pool 21, 22, 23; c. Comparison of the determined position with a predetermined position range 41, 51 to generate a control signal for the control unit 7 of the counter-current system 3; d. Increase or decrease the flow velocity v generated by the counter-current system (3) by means of the control unit 7 when the person 22, 23 swimming in the pool is in the predetermined position range 41, 51.

The invention discloses an anti-countercurrent system based on V2G equipment and a control method, and the system comprises at least two charging and discharging modules which are connected to one side of a power line, and the other side of the power line is connected to a power grid; the charging and discharging module comprises a first bidirectional electric meter and a V2G charging pile. One end of the V2G charging pile is connected with the power line through the first bidirectional ammeter, and the other end is connected with the charging terminal. The bidirectional main electricity meter is connected between the power line and the power grid; the contactor is connected between the bidirectional main ammeter and the power line. The anti-countercurrent control module is in communication connection with the bidirectional main electric meter, the contactor, the first bidirectional electric meter and the V2G charging pile; according to the invention, a virtualized anti-countercurrent control architecture is adopted, any V2G charging pile or cloud server is used as an anti-countercurrent control module, a traditional hardware controller is replaced by existing equipment computing power, global power regulation and control are realized based on data provided by the bidirectional main ammeter and the first bidirectional ammeter, and the system deployment cost and complexity are significantly reduced.

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 an energy storage system grid-connected point power cooperative control method and system, and relates to the technical field of energy storage systems, and the method comprises the steps: collecting the secondary voltage and current of a grid-connected point, and calculating the active power P of the grid-connected point; based on the active power P of the grid-connected point, judging whether to trigger an anti-countercurrent control or demand control condition; when anti-reflux control is triggered, an anti-reflux instruction is calculated according to the anti-reflux set value, the anti-reflux return difference and the anti-reflux adjustment multiple; when demand control is triggered, a demand instruction is calculated according to a demand set value, a demand return difference and a demand adjustment multiple; generating a charging and discharging instruction based on the plan curve instruction, the anti-reflux instruction and the demand instruction; according to the invention, on countercurrent prevention and demand instruction calculation, limiting conditions such as the regulation quantity reduction multiple, the regulation quantity amplification multiple and the return difference are introduced, and the power of the grid-connected point can be quickly responded and dynamically regulated under the complex working condition that the load power of the grid-connected point fluctuates severely.

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 discloses an anti-countercurrent control method, an anti-countercurrent system and a medium, and relates to the field of power electronics. According to the scheme, an inductor is additionally arranged in an existing power utilization system, and the characteristics that the inductor can conduct charging and hinder current changes are utilized; when the electric power of the load is reduced, redundant electric quantity sent to the load by the photovoltaic system and / or the energy storage system through the grid-connected inversion equipment is stored through the inductor, and time is reserved for the operation of adjusting the output power of the grid-connected inversion equipment by the controller, so that when the electric power of the load is suddenly reduced, the load is ensured to be switched off. And the controller can accurately adjust the output power of the grid-connected inverter equipment, thereby ensuring that the electric energy output by the grid-connected inverter equipment cannot be returned to the power grid.

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.

A post-treatment process for crude biodiesel containing residual monoacylglycerol (MAG) and including contacting said crude biodiesel with a concentrated alkaline solution, double counter-current washing each followed by a phase separation and drying. The process is economical in chemicals and washing water.

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.

A centrifugal pellet dryer system includes a centrifugal dryer, a blower to generate counter-current airflow across the centrifugal dryer, damper(s), moisture sensor(s), airflow sensor(s), processor(s), and a memory. The processor(s) continuously monitor (i) the airflow across the centrifugal dryer via the airflow sensor(s), (ii) the moisture level of the pellets via the moisture sensor(s), (iii) a blower motor load, and (iv) a centrifugal dryer motor load. The processor(s) determine whether the airflow falls below a predetermined threshold, and responsive to such determination, automatically initiate a water and / or air spray to reduce fines within the centrifugal dryer. The processor(s) continuously compare the moisture level of the pellets to predetermined threshold(s), and dynamically adjust the damper(s) and / or the blower motor load, thereby adjusting the moisture level of the pellets. The processor(s) continuously determine whether the slurry requires additional or less water, and automatically adjust water to the slurry based on such determination.

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.

A battery cell heat exchanger (10) comprising:a first outer plate (12) having a central, generally planar region (18) surrounded by a peripheral flange (20);a second outer plate (14) having a central, generally planar region (18) surrounded by a peripheral flange (20);andan intermediate plate (16) disposed between the first and second outer plates (12, 14) and having a circumferential flange (40), the circumferential flanges (20) of the outer plates (12, 14) being in sealing contact with the circumferential flange (40) of the intermediate plate (16), a plurality of first fluid flow passages (58) formed between the intermediate plate (16) and the first outer plate (12), each of the first fluid flow passages (58) having a first end for admitting a fluid into the first fluid flow passages (58) and a second end for discharging the fluid from the first fluid flow passages (58), the first and second ends defining a direction of flow through the first fluid flow passages (58);a plurality of second fluid flow passages (60) formed between the intermediate plate (16) and the second outer plate (14), each of the second fluid flow passages (60) having a first end for admitting fluid into the second fluid flow passages (60) and a second end for discharging fluid from the second fluid flow passages (60), the first and second ends defining a direction of flow through the second fluid flow passages (60); wherein the battery cell heat exchanger (10) further comprises:a first protrusion (64) extending out of the plane of the peripheral flange (40) of the intermediate plate (16) in a first direction and provided for sealing contact with an inner surface of the second outer plate (14);a first manifold opening (34) formed in the first protrusion (64) and in fluid communication with the first ends of the plurality of first fluid flow passages (58);a second protrusion (65) extending out of the plane of the peripheral flange (40) of the intermediate plate (16) in a second direction opposite to the first protrusion (64) and provided for sealing contact with an inner surface of the first outer plate (12); a second manifold opening (36) formed in the second protrusion (65) and in fluid communication with the second ends of the plurality of second fluid flow passages (60); an inlet in fluid communication with the first manifold opening (34) and for admitting fluid into the battery cell heat exchanger (10);an outlet in fluid communication with the second manifold opening (36) and for discharging fluid from the battery cell heat exchanger (10), wherein the first and second fluid flow passages (58, 60) are arranged to alternate over a main body region such that the first fluid flow passages (58) are in heat transfer relationship with the second fluid flow passages (60); wherein the second ends of the first fluid flow passages (58) are in fluid communication with the first end of the second fluid flow passages (60), and the flow direction of the first fluid flow passages (58) is therefore opposite to the flow direction of the second fluid flow passages (60);

The present invention discloses a portable counter-current flow thermal management system facilitating cooling of a battery pack. System comprises at least one pump, first and second connecting tubes, and heat exchanger unit. The at least one pump enables circulation of a cooling agent with pre-defined rate of flow based on real-time temperature data detected from the battery pack. The cooling agent may include a liquid, a gas, a dielectric fluid, and glycol compound. First connecting tube facilitates flow of cooling agent. Heat exchanger receives and automatically adjusts the temperature of the cooling agent. The second connecting tube receives cooling agent and provides to input terminal is coupled to output terminal along a horizontal axis in a bent fashion facilitating a single interface enabling counter-current flow of cooling agent across battery cells in battery pack.

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.

Certain embodiments of the invention are directed to methods of adjusting the concentration of one or more electrolytes in a patient's blood using a counter current electrolyte solution.

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 utility model discloses a multistage countercurrent stirrer, including bush, bush is equipped with the stirring vane in the stirring shaft, both sides of bush are equipped with the stirring vane, and two stirring vanes are centrally symmetric and set, the stirring vane includes main blade and vice blade, one end of main blade is fixed in bush, and vice blade is set in the one end of main blade relative to bush, vice blade is formed through bending with main blade, and main blade rotates to left, and vice blade rotates to right, the multistage countercurrent stirrer of the utility model adopts bending whole board material, and the stirring vane that can be formed by main blade and vice blade is formed, and the production and processing of stirring vane do not need to weld, and the integrity of stirring vane is strong, and the intensity is good, and it is easy to process, and the processing efficiency is high.

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 invention relates to the technical field of household energy storage, in particular to a household energy storage system integrated with quick countercurrent prevention and modular quick assembly functions, which comprises a data acquisition module, a countercurrent prevention monitoring module, a data processing module, an execution control module and an assembly type embedded module, the invention aims to solve the problem that in a traditional household energy storage system, direct current and voltage are high, and the household energy storage system after manual connection is prone to countercurrent faults in the charging and discharging process, the complexity of manual wiring is reduced by rapidly detecting and preventing electric power from flowing back to a power grid, and the reliability of the household energy storage system is improved. The safety, the efficiency and the easiness in installation of the system are obviously improved through a highly integrated module; real-time data transmission with a monitoring background is realized through a communication interface, and high efficiency of remote monitoring and fault diagnosis is ensured. Due to the innovative design, the requirements of household energy storage and solar power generation can be better met, and the intelligence and the user experience of the energy storage system are improved.

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.