370 results about "Ice melt" patented technology

The invention relates to the technical field of electrical digital data processing, and discloses a train ice melting simulation optimization method of an electromagnetic thermal coupling model fused with a deep learning method, which comprises the following steps of: inputting a geometric representation tensor and a physical working condition parameter vector containing an electromagnetic excitation frequency and a reference environment temperature into a feature mapping neural network; outputting a dual-channel space source item tensor containing basic heat source power density and a heat source to temperature change sensitivity distribution matrix through nonlinear convolution operation; constructing a heat conduction discrete numerical value evolution operator configured with an active item linear correction interface; time stepping operation is executed according to the heat conduction time scale, a basic heat source is corrected in real time through the Hadamard product of a sensitivity distribution matrix and temperature deviation, and an operator is substituted for solution. On the premise that electromagnetic-thermal nonlinear coupling characteristics are reserved, decoupling of the time scale is achieved, and the calculation efficiency in high-frequency physical field simulation is effectively improved.

The invention discloses a concrete model under salt freezing circulation, a construction method and a construction method of a damage evolution model, and a salt freezing circulation process is simplified into processes of continuous accumulation of sulfate crystals in pores, water condensation into ice, and repeated expansion and contraction of ice melting into water. The process of continuous accumulation of pore sulfate crystals in the sample concrete model and the process of mortar reduction and porosity increase in the sample concrete model are simulated, model parameters are adjusted, so that the salt freezing process of the sample conforms to the actual situation, and the service life of concrete is predicted through the sample concrete model. A specific time node reaching a failure standard is accurately predicted; the invention discloses a concrete damage evolution model based on the combination of continuous damage mechanics and a crack propagation theory, and aims to solve the problem that a traditional concrete damage model cannot accurately predict concrete damage evolution in a salt freezing circulation environment, and particularly, the long-term influence of the salt freezing environment on a concrete structure is lack of accurate quantitative analysis.

The invention relates to a low-voltage distribution network non-power-off online ice melting method based on mobile power supply equipment, and the method comprises the following steps: obtaining meteorological information, and line parameter information and line icing information of a low-voltage distribution network; according to the meteorological information, the line parameter information and the line icing information, calculating the minimum ice melting current required by the icing line and the ice melting line power under the minimum ice melting current; and selecting to deploy a first mobile power supply device for transmitting power, or deploying a second mobile power supply device and the first mobile power supply device for transmitting power and absorbing power respectively, so as to carry out ice melting operation based on the ice melting line power. Ice melting can be carried out without power outage, and the supporting capacity of a distribution network line for coping with extremely cold climate is improved.

The invention discloses a preparation method of a composite micro-groove super-hydrophobic low-ice-adhesion photo-thermal film. The preparation method comprises the following steps: (1) constructing a low-elasticity-modulus photo-thermal composite sponge substrate through a solvothermal method; (2) uniformly coating the surface of a substrate with a polydimethylsiloxane (PDMS) precursor solution by adopting an aerosol-assisted deposition technology, and carrying out thermocuring to form a functional composite interface layer; and (3) constructing a multi-stage scallop surface-imitating micro-nano groove composite structure on the surface of the interface layer by using a femtosecond laser micro-nano processing technology. The prepared film has super-hydrophobicity, the surface of the film is in a Cassie-Baxter wetting state with a 164-degree contact angle and a 1-degree rolling angle, and the film has a surface self-cleaning function. Under the icing condition, the adhesion strength of an ice layer of the system is obviously reduced to 2.57 kPa, the static delay icing time is effectively prolonged to 1587 s, and the system has the photo-thermal response characteristic and can realize rapid icing ablation under the standard solar irradiance; the preparation method has the characteristics of high process controllability, environment friendliness and the like, and is suitable for large-scale continuous production.

The invention discloses a mobile contact network direct-current ice melting method, which comprises the following steps that: a monitoring vehicle and an ice melting vehicle are marshaled and run to a designated place, the two vehicles are de-marshaled, the ice melting vehicle is parked to the designated place, and the monitoring vehicle continues to run towards an ice melting section. The ice melting vehicle starts to electrically connect the wire clamp for construction after the contact network is subjected to electricity testing and grounding, and at the moment, the monitoring vehicle collects environment working conditions and icing state information in the ice melting section. And after construction of the electric connecting wire clamp and acquisition of monitoring information are completed, the monitoring vehicle sends an optimal ice melting current value to the ice melting vehicle, and the ice melting vehicle outputs an actual ice melting current after judging that the ice melting vehicle works normally. In the ice melting process, the monitoring vehicle reciprocates in the ice melting section, the icing degree of the contact network is monitored, and when it is monitored that icing disappears, an ice melting stopping instruction is sent to the ice melting vehicle. After ice melting is finished, the contact network is subjected to electricity testing and grounding at the ice melting vehicle, then the electric connecting wire clamp is removed, and the monitoring vehicle runs towards the ice melting vehicle. The technical problems that an existing overhead line system electric heating ice melting device is poor in mobility and low in utilization rate can be solved.

The invention relates to the technical field of ice prevention and disaster reduction of high-voltage power transmission lines, and discloses a cascaded direct-current ice melting system of a high-voltage power transmission line, a control method and a device. The method comprises the following steps: inputting a test signal to the cascaded direct-current deicing system, and detecting the voltage and current of each node; calculating line impedance distribution based on the voltage and current of each node, and constructing a line equivalent model; calculating the minimum ice melting current based on the ice thickness monitoring data and the weather data, and calculating the output current of each ice melting device based on the minimum ice melting current and the line equivalent model; monitoring circulating current between systems, and calculating virtual compensation voltage based on the circulating current; and adjusting the output voltage of each ice melting device based on the virtual compensation voltage. The ice melting success rate, the safety of the system and the service life of the system can be improved.

The invention discloses an overhead ground wire non-outage direct current deicing method, medium and system, and the method comprises the steps: determining the length of an overhead ground wire section to be deiced according to the obtained overhead ground wire parameters, overhead ground wire icing conditions and meteorological environment parameters; according to the resistance corresponding to the length of the ground wire section, the overhead ground wire parameter, the icing condition and the meteorological environment parameter, obtaining an ice melting current; calculating a lightning current value according to the overhead ground wire parameters and the lightning current peak value; if the maximum ice-melting current is greater than or equal to the thunder current value, reducing the length of the ground wire section until the maximum ice-melting current is less than the thunder current value; if the maximum ice melting current is smaller than the lightning current value, insulation transformation is carried out on the ground wire; and connecting the transformed ground wire section with a direct-current ice melting device to form an ice melting loop, and carrying out direct-current ice melting without power failure. According to the invention, lightning protection and ice melting are taken into consideration, the ice melting work is completed while lightning protection is maintained, and the reliability and the safety of uninterrupted power supply ice melting of the overhead ground wire in severe weather of a power system are improved.

The invention discloses a full-process monitoring system, method and equipment for an ice melting station, and the system comprises a power monitoring module which is used for monitoring the line operation conditions of a high-voltage power side and a low-voltage power side, and obtaining the line data; the switch cabinet module is used for controlling the action of switch equipment in the switch cabinet and monitoring the state parameters of the switch equipment; the transformer module is used for monitoring operation parameters of a transformer and determining an opening and closing signal according to the operation parameters of the transformer; the microcontroller is used for fusing the line data, the switch equipment state parameters and the opening and closing signals to generate a dynamic ice melting instruction; the ice melting control module is used for determining a matched control strategy according to the dynamic ice melting instruction so as to control elements in the ice melting device to act, monitoring the running state of each element and displaying monitoring data through a communication screen; the safety risk of manual operation is reduced, and automatic control and real-time monitoring of the ice melting device are realized, so that the ice melting efficiency, reliability and timeliness are improved.

The invention discloses a contribution decomposition calculation method for lake expansion. The contribution decomposition calculation method comprises the following steps: extracting a lake area through a remote sensing image and a digital elevation model, inverting water volume change, judging a rainfall phase state by using a temperature threshold method, estimating ice and snow ablation amount in combination with a degree-day factor method, and calculating a glacier runoff total amount; constructing a single-layer evaporation model, calculating flux of net radiation, sensible heat, latent heat, water body heat storage and the like based on a lake surface energy balance equation, and obtaining daily lake surface evaporation capacity; quantile mapping and Bayesian fusion are combined, and lake surface rainfall is corrected; non-glacial runoff is calculated according to a lake water balance equation; dividing a stable period and an expansion period according to the lake area trend, calculating an abnormal value of the expansion period by taking the hydrological mean value of the stable period as a reference, and finally determining the expansion contribution of each hydrological factor according to the increment proportion of the abnormal value in the total water quantity. Through the method, the contribution intensity of different driving factors is determined, scientific support is provided for lake change simulation and evolution prediction, and ecological protection and management strategies are more targeted.

The utility model discloses a deicing device which is used for deicing a battery replacing vehicle, a battery pack of the battery replacing vehicle is installed at the bottom of a vehicle body through a locking mechanism so that quick replacement of the battery pack can be achieved, the deicing device comprises a movable vehicle body and an electromagnetic heating unit installed on the vehicle body, and the electromagnetic heating unit can generate an alternating electromagnetic field on the periphery of the electromagnetic heating unit; the machine body can move to the bottom of a vehicle body of the battery changing vehicle and enables the bottom of the vehicle body and / or the locking mechanism to be heated under the action of the alternating electromagnetic field of the electromagnetic heating unit so as to conduct deicing operation on the bottom of the vehicle body and / or the locking mechanism. Heat for hot melting of the ice layer comes from heat energy generated by the locking mechanism and / or the vehicle body, and the heat energy is transmitted into the ice layer in a direct contact solid conduction mode, so that the transmission loss of the heat energy from the locking mechanism and / or the vehicle body to the ice layer is greatly reduced, the ice layer receives the heat from the locking mechanism and / or the vehicle body to a large extent, and the service life of the ice layer is prolonged. And the ice melting efficiency is greatly improved.

The invention discloses a high-strength anti-icing OPGW (Optical Fiber Composite Overhead Ground Wire) sag dynamic prediction and optimization system, particularly relates to the field of power transmission monitoring in alpine regions, is used for solving the problem that the sudden change of the sag of an OPGW is difficult to dynamically predict due to icing superposition, and is based on a load-deformation joint sequence accurately associated with a multi-source load response data set and segmented attached ice distribution. Identifying a tension rapid transfer node and fusing a temperature drop shrinkage trend, quantifying a risk through machine learning, driving local ice melting power distribution by a risk boundary, effectively suppressing a peak tension and leaving a controllable residual strain, and continuously correcting a prediction model by using time sequence increment assimilation; data driving and model correction are adopted for synchronous iteration, and prediction deviation caused by uneven ice attaching space and temperature shrinkage time sequence coupling is eliminated; the real-time ice melting scheduling output significantly delays the sag overrun caused by tension accumulation, ensures the optical fiber communication performance and the safe operation of the wire, and provides a quantitative decision basis for the operation and maintenance of the high-strength anti-icing OPGW line.

The invention relates to the technical field of ice melting intermittent deicing risk assessment, and provides an ultra-high voltage transmission line ice melting intermittent deicing risk assessment method and system. Performing icing form evolution analysis according to the split conductor icing point cloud data and the environmental meteorological data to obtain an icing form change trend of regional icing form change trends including different attachment regions of each sub-conductor; and according to the icing form change trend of each sub-conductor, performing icing shedding analysis to obtain a corresponding conductor icing shedding risk value, and summarizing the conductor icing shedding risk values of the sub-conductors to obtain a corresponding risk assessment result. According to the invention, a dynamic evolution analysis mechanism for the ice coating form of the ice-melting intermittent split conductor based on the coupling characteristics of the environmental meteorological data and the ice coating form change can effectively improve the accuracy and efficiency of the ice coating falling risk assessment of the split conductor.

The utility model relates to the technical field of overhead line system deicing, and provides an overhead line system deicing device for railway power supply. The contact network deicing device for railway power supply comprises a fixed box, an ice melting mechanism and an ice breaking mechanism, a sliding cavity is formed in the front end face of the fixed box, and the ice melting mechanism is connected to the fixed box. According to the overhead line system deicing device for railway power supply, the two deicing modes of high-frequency vibration and electric heating are organically combined together, the limitation of a single deicing mode is overcome, in the deicing process, firstly, the arc-shaped rack is driven by the vibration motor to conduct high-frequency impact on an ice layer, and then the arc-shaped rack is driven by the electric heating motor to conduct high-frequency vibration on the ice layer; according to the ice melting device, micro-cracks can be generated in a hard ice layer, the integrity of the overall structure of the ice layer is damaged, preliminary mechanical ice breaking is achieved, then heat generated by the electric heating pipe can rapidly permeate along the cracks, the heat conduction area is greatly increased, ice melting is rapid, and therefore the ice melting efficiency is improved, and energy consumption is greatly reduced.

A miniature ice melting device for a high-voltage line comprises an ice melting body, a span string crossing part, an anchor section crossing part, a power source and power supply module, an electric energy obtaining module and a deicing driving module, and is used for obtaining electric energy from a contact line of a railway contact network through the electric energy obtaining module and providing the electric energy for ice melting work of the ice melting body. The deicing driving module and the power supply and power supply module are used for pushing the high-voltage line miniature ice melting device to advance on a contact network, the span string crossing is used for passing through a contact network dropper and a positioner, and the anchor section crossing is used for enabling the high-voltage line miniature ice melting device to smoothly pass through a contact network anchor section joint. The miniature ice melting device for the high-voltage line can continuously deice in a reciprocating manner for a long time in an electric split phase, and meanwhile, the anchor section can move to a catenary bracket led out from a non-working branch of the catenary in advance when a motor train unit or an electric locomotive passes through, so that the influence of deicing equipment on normal operation of the train is avoided, and the working efficiency is improved. The miniature ice melting device for the high-voltage line can save a large amount of manpower and material resources for deicing, and meanwhile, the miniature ice melting device for the high-voltage line can also be used for deicing on other high-voltage lines through simple transformation.

The invention relates to the technical field of ice melting, and discloses a low-frequency ice melting method and device for a power distribution network and a medium. The method comprises the following steps: selecting a 10kV power distribution network ice-melting line section, determining a power taking point and a short-circuit tail end of an ice-melting three-phase line, and obtaining line parameters to determine ice-melting power and total ice-melting power of a wire per unit length; calculating the low-frequency impedance characteristic of the power distribution network line according to the line cross section area, and determining a power-frequency ice-melting current effective value; calculating a power frequency ice melting voltage required by the line based on the ice melting power; determining the lowest ice melting frequency according to a preset proportion based on the power frequency ice melting voltage by taking no over-excitation of the branch line distribution transformer as a constraint; determining a voltage output and a power output of the ice melting device based on the minimum ice melting frequency; and judging whether the load side of the branch transformer has an electric shock risk or not, and carrying out power distribution network line ice melting operation. Reactive power output can be effectively saved, phase line switching operation of direct current ice melting is avoided, and ice melting efficiency is effectively improved.

The invention relates to the technical field of road maintenance equipment, in particular to a viaduct ice and snow active identification and removal method and equipment based on deep learning, and aims to realize high-precision and low-delay identification of ice at the bottom of a bridge by replacing a standard convolutional layer in a YOLOv8 backbone network with a GSConv module and constructing a lightweight target detection model; by means of the identified and output position coordinates and size information, the infrared heating plate is guided to be accurately aligned with the root of the ice hanging part, heating parameters are dynamically adjusted, and the ice hanging part naturally falls off after being heated; falling ice blocks enter an ice melting box with a heating layer at the bottom through a collecting tank and a conveying pipeline, are instantly melted into water and are discharged through a drainage pipe, and a closed-loop clearing process without ice storage is formed. Manual intervention is not needed, the bridge body is prevented from being damaged by mechanical impact, the overturning risk of equipment caused by ice storage is eliminated, and the safety, efficiency and automation level of deicing operation are remarkably improved.

The embodiment of the invention relates to the field of removing ice and snow on railway turnouts, in particular to turbojet ice and snow removing equipment which comprises a body, a turbojet engine and an air compressor. A fuel inlet, an air inlet and a high-temperature and high-pressure gas outlet are formed in the body, the turbojet engine and the air compressor are arranged in the body, fuel enters the body from the fuel inlet so as to enter the turbojet engine, and external air enters the body from the air inlet so as to enter the air compressor; the turbojet engine generates high-temperature and high-pressure gas through fuel and external air, the high-temperature and high-pressure gas is output from the turbojet engine and exhausted from the high-temperature and high-pressure gas exhaust port, and the exhausted high-temperature and high-pressure gas purges the position to be purged. The body is configured to reduce vibration of the turbojet engine. According to the turbojet ice and snow removing equipment provided by the embodiment of the invention, accumulated snow, frozen snow and frozen ice on a railway are melted and blow-dried through high-temperature and high-pressure gas, ice and snow on the railway can be efficiently and comprehensively removed, and normal work of the railway is guaranteed.

A distributed ice melting device topological structure suitable for an ultra-high voltage power transmission line comprises a plurality of ice melting sub-modules arranged in a distributed mode, and each ice melting sub-module comprises a single-turn coupling transformer, a metal oxide voltage limiter, a bypass switch, a filter, an H-bridge current converter and a direct-current capacitor. A primary winding of the single-turn coupling transformer is directly formed by split sub-conductors of the ultra-high voltage power transmission line, and a secondary winding of the single-turn coupling transformer is electrically connected with other parts of the ice melting sub-modules, so that the ice melting sub-modules are connected in series on the split sub-conductors of the power transmission line in a distributed manner; the H-bridge current converter is electrically connected with the direct-current capacitor, and the direct-current capacitor provides smooth direct-current voltage for the H-bridge current converter; the filter is connected in series with the H-bridge current converter, the bypass switch is connected in parallel with the H-bridge current converter, and the metal oxide voltage limiter is connected in parallel with the line side output end of the ice melting sub-module; and the ice melting sub-modules adjust the current of the corresponding split sub-conductors by changing the equivalent impedance of the ice melting sub-modules, so that accurate ice melting of the ice-coated split sub-conductors is realized, and the overall current and the transmission power of the power transmission line are kept unchanged. The technical problem to be solved by the invention is to provide the distributed ice melting device topological structure suitable for the ultra-high voltage power transmission line, and the technical problem that the existing ice melting technology cannot realize accurate ice melting and non-power-cut operation on an ice coating section on the ultra-high voltage power transmission line is solved. And normal transmission of the line is affected due to overlarge capacity demand, line overcurrent or incapability of three-phase synchronous ice melting.

The application discloses a metro flywheel energy storage system with a direct current ice melting function, which comprises a medium voltage looped network, a contact network, a running rail and positive and negative bus lines, and further comprises a metro rectification module and a flywheel energy storage module; the metro rectification module is connected with the positive and negative bus lines; the positive bus line is connected with the contact network, and the negative bus line is connected with the running rail; the flywheel energy storage module is connected with the positive bus line, the negative bus line and the running rail respectively; the flywheel energy storage module is further connected with the contact network through a circuit breaker QF, and the contact network and the running rail are connected through a remote short-circuit switch K3. The application further discloses an ice melting and energy storage method using the metro flywheel energy storage system with the direct current ice melting function. The application has both the direct current ice melting function and the flywheel energy storage charging and discharging function, the two functions are time-multiplexed through switch control, efficient utilization of the equipment is realized, and the performance-price ratio is improved.

The utility model relates to the technical field of ice making, and solves the problems that when ice blocks are not used up, the ice blocks are melted in an ice making assembly, and the melted water is not collected by a worker, so that water resources are wasted. The ice making assembly comprises a storage frame, a sliding groove is formed in the storage frame, a sealing plate is slidably connected into the sliding groove, a placement frame is clamped into the storage frame, connecting plates are fixedly installed on the two sides of the surface of the placement frame, and a collecting assembly is arranged at the bottoms of the connecting plates. A water tank is fixedly installed on one side of the surface of the storage frame, a guide pipe is arranged on one side of the top of the water tank, an ice maker used for making ice is arranged at one end of the guide pipe, the ice maker is fixedly installed on the back of the storage frame, and the collecting assembly comprises a collecting frame fixedly installed on the surface of the connecting plate; a water pump is fixedly installed on one side of the surface of the collecting frame, and a flow guide pipe is fixedly installed at the output end of the water pump.

The present application relates to the technical field of ventilation pipe, in particular to an assembled composite ventilation pipe for large factory building, which comprises a transverse ventilation pipe, an adapter pipe, a longitudinal ventilation pipe and a wall, a water collecting box is arranged at the bottom of the transverse ventilation pipe outside the wall, the water collecting box is used for collecting ice water from the inner wall of the longitudinal ventilation pipe to prevent the ice water from flowing back to the inside of the transverse ventilation pipe, a water guiding mechanism is movably arranged in the water collecting box, the water guiding mechanism supports the ice water during the water collecting stage and releases the ice water when the liquid level in the water collecting box reaches a preset weight. The melted ice water is collected by the water collecting box, which prevents the ice water from staying in the transverse ventilation pipe and affecting the exhaust. Moreover, the gravity of the collected ice water drives the water guiding plate and the adjusting plate to move downward synchronously, and the guide plate rotates outward to guide the hot air flow to blow against the inner wall of the longitudinal ventilation pipe, which improves the ice melting effect and increases the pressure in the transverse ventilation pipe to improve the discharge speed of the ice water on the water guiding plate.

The invention discloses a high-frequency chopping voltage regulation type modularized direct-current ice melting device, belongs to the technical field of direct-current ice melting of a power system, and realizes millisecond-level continuous regulation of direct-current voltage 0-rated output voltage and precise and controllable output current 0-rated output current through a three-level BUCK circuit. The device is composed of a self-coupling 12-pulse rectifier transformer, a high-frequency rectifier unit, a miniature meteorological station, a wireless communication unit and a control unit. The modular architecture design supports independent use of one module (12 pulse wave rectification) or series-parallel use of two modules (24 pulse wave rectification), the output power is multiplied, and external filtering equipment is omitted. The miniature meteorological station and the wireless communication unit obtain real-time meteorological parameters, the control unit calculates the optimal ice melting current according to the environment temperature, the wind speed, the humidity, the air pressure and the line parameters, and energy is saved by more than or equal to 30%.

The ice-making water storage barrel comprises a water barrel body, a refrigeration compressor, a cold water tower, an expansion valve and a capillary tube, the water barrel body comprises an outer water barrel and an inner water barrel, the inner water barrel is located in the outer water barrel, a refrigeration pipe is located between the outer water barrel and the inner water barrel, a water inlet bin is arranged on the inner water barrel, and a water outlet bin is arranged on the outer water barrel. A plurality of first through holes are formed in the water inlet bin and communicated with the outer water bucket and the inner water bucket, an air bag is arranged in the water inlet bin and connected with an air inlet pump and an air extracting pump of the outer water bucket, and the refrigeration compressor can make ice from water in the water bucket body through the condenser, the expansion valve and the capillary tube. In the ice making process, the air bag is filled with air, the first pass is closed, when ice making is stopped, the air bag discharges air to flow out of the first pass, ice melts and enters the inner water bucket, water in the inner water bucket is cooled, the structure can prolong the refrigeration time and improve the refrigeration efficiency, and the operation mode of ice making is simple.

The invention discloses an opencast coal mine coal spontaneous combustion incubation period prediction method suitable for a negative temperature condition, and relates to the technical field of coal spontaneous combustion prediction. The method comprises the following steps: firstly, carrying out an oxygen adsorption dynamic experiment on a to-be-detected coal sample at a constant temperature of-20 to 100 DEG C to obtain a low-temperature oxygen adsorption rate constant and establishing a function relationship between the low-temperature oxygen adsorption rate constant and the temperature; secondly, calculating ice melting latent heat according to the ice content in the coal sample to be detected, and introducing the ice melting latent heat as a key energy loss item into the heat-mass transfer model of the coal pile; further, establishing a coal pile energy balance equation comprehensively considering oxidation heat release, ice melting latent heat consumption and a heat dissipation process; and finally, solving the equation through a numerical method, and calculating the time required by the coal pile from the initial negative temperature rise to the critical spontaneous combustion temperature so as to obtain the accurate coal spontaneous combustion latency. The method is particularly suitable for mines in cold regions, surface mines and winter coal storage yards.

The invention discloses a micro-terrain power transmission line ice melting calculation method considering solar radiation, relates to the technical field of electric engineering power transmission, and solves the problem that a natural heat source of solar radiation cannot be fully considered and accurately utilized when the ice melting problem of a power transmission line is evaluated in the prior art. View field analysis, a shielding coefficient and a line posture correction coefficient are introduced, the actual solar radiation amount received by the power transmission line in the complex mountain area micro-terrain environment is calculated, resource waste or potential safety hazards caused by evaluation deviation are avoided, and the ice coating ablation accuracy is improved by accurately quantifying the ablation effect of the solar radiation on the ice coating. A natural ice melting strategy is provided for operation and maintenance of a power grid, so that dependence on a high-energy-consumption active ice melting technology is reduced, and economical efficiency of ice melting of the power transmission line is improved. In addition, the method can generate a temperature space distribution diagram along the direction of the line, and provides high-precision scientific guidance for routing inspection of the power transmission line, making of an ice melting strategy, planning and design of the line and safe operation and maintenance.

The application discloses a control method of a power distribution line ice melting device, which adopts the power distribution line ice melting device to melt ice, and the ice melting device comprises a parallel side converter, a series side converter, an energy storage capacitor, a parallel side transformer and a series side transformer, the energy storage capacitor is connected between the parallel side converter and the series side converter, the parallel side converter is a three-phase converter, absorbs active power of a fundamental frequency from the power distribution network through the parallel side transformer, the series side converter is a single-phase converter, generates non-fundamental wave current, and injects the non-fundamental wave current into a first end of a line to be melted through a neutral point of the series side transformer to generate Joule heat in the line to be melted to melt ice without power-off operation. Compared with the traditional method, the application can effectively reduce the interference on the power grid, reduce the ice melting cost, and improve the stability and reliability of the system.

The invention provides a power distribution network power supply recovery method considering node importance and recovery dependence. The method comprises the following steps: 1) obtaining fault information of a power distribution network in real time; 2) comprehensively evaluating the importance weight of each node by adopting a comprehensive weight method combining an analytic hierarchy process and an entropy weight method; 3) using a reverse breadth-first search algorithm from the fault points to identify a repair dependency relationship among the fault points, and determining an upstream fault set which needs to be repaired firstly when any fault point is repaired; 4) quantifying the reduction amount of the ice melting device deployed before the disaster on the fault recovery time, and correcting the fault recovery time of each fault point in the fault set; 5) constructing a repair sequence optimization model with the goal of minimizing the total weighted load loss amount; 6) solving the repair sequence optimization model by the scheduling control center by adopting an improved genetic algorithm, and generating an optimal sequence for fault repair; and 7) dynamically adjusting the optimal sequence of fault repair.

The invention discloses a system and a method for treating wastewater by using low-grade flue gas waste heat in a coal-fired power plant, and relates to the technical field of sewage treatment, and the system comprises a flue gas flow channel, an absorption refrigeration module, a freezing crystallization module and a humidifying, dehumidifying and desalting module. The absorption refrigeration module is used for absorbing flue gas heat in the flue gas flow channel and generating a freezing medium; the freezing crystallization module is used for receiving a freezing medium generated by the absorption type refrigeration module, cooling the salt-containing wastewater and generating ice and crystal salt, the separated ice is melted into melted ice water, the humidifying, dehumidifying and desalting module comprises a dehumidifier, a heater and a humidifier, the fan inputs air into the humidifier, the melted ice water enters the dehumidifier to be heated, and the dehumidifier is connected with the heater and the humidifier. And then the water enters the heater to be heated by the high-temperature flue gas, the water and the air are contacted and mixed in the humidifier, the humidity of the air is increased, the air enters the dehumidifier to be cooled, and the clean water and the air condensed in the dehumidifier are discharged. The flue gas waste heat can be utilized to treat the high-salinity wastewater, and the operation cost is reduced.

The utility model relates to food production equipment technical field, concretely relates to a kind of coconut milk ice block feeding material device, including tank, stirring motor and support, tank and stirring motor are all fixed on support, tank is located above stirring motor, a shearing assembly is equipped in tank, shearing assembly connects stirring motor;Tank has hot water inlet, feeding port, discharge port and cleaning port, several are all communicated with the inner chamber of tank, hot water inlet, feeding port and cleaning port are all set in the top of tank, discharge port is set in the bottom of tank.The utility model realizes the ice feeding and ice melting device of integrated structure, both solves the problem of traditional ice crusher production cleaning, reduces the risk of microbial overproof, and also simplifies production procedure, improves production efficiency.

The invention relates to the technical field of power system safety protection, and particularly provides a power grid transmission line ice melting thickness prediction method and device based on numerical simulation. Comprising the following steps: substituting numerical values of ice melting influence parameters of the power grid transmission line into a pre-constructed convective heat transfer coefficient calculation formula, and calculating a convective heat transfer coefficient of the power grid transmission line; determining the ice melting thickness of the power grid power transmission line based on the convective heat transfer coefficient of the power grid power transmission line; wherein the pre-constructed convective heat transfer coefficient calculation formula is obtained in a numerical simulation mode. According to the technical scheme provided by the invention, quantitative and accurate prediction of the ice melting thickness under the dynamic meteorological condition can be realized.