37results about How to "Melting ice fast" patented technology

The invention relates to a method for determining parameters of a transmission line overhead ground wire direct-current ice-melting device. The method comprises the following steps of: (1) collecting main parameters of each overhead ground wire and main parameters of the transmission line in the running scope of the transmission line overhead ground wire direct-current ice-melting device; (2) selecting one overhead ground wire and one transmission conductor in serial connection for melting ice in the manner of one-entering one-exiting ice-melting; (3) determining a minimal ice-melting current for each overhead ground wire; (4) determining a direct current voltage and capacity of each overhead ground wire; (5) determining a rated output voltage and rated capacity of the direct-current ice-melting device, and combining the ice-melting current to determine a running trigger angle of the ice-melting device; and (6) determining the current and capacity overload capability of the transmission line overhead ground wire direct-current ice-melting device as 1.2 times and rated 1 hour. According to the method provided by the invention, the quick ice-melting of each overhead ground wire is met, the capacity of the direct-current ice-melting device is reduced as much as possible, the investment is saved and the safety of running is improved.

A line de-icing device for distribution network Include material trolley, a liquid pump and a control switch for controlling the opening and closing of the liquid pump, A liquid storage tank and a liquid pump are arrange on that material trolley, a liquid deicer is store in the liquid storage tank, a pumping port of the liquid pump is communicated with the liquid deicer in the liquid storage tankthrough a water inlet pipe, a deicer mechanism is arrange at the upper end of an insulating operation rod, and a water outlet of the liquid pump is connected with the deicer mechanism through a wateroutlet pipe; The deicing mechanism comprises an L-shaped bracket arranged on the upper side of the insulated operating lever, a fixed shaft horizontally arranged on the outside of the L-shaped bracket, a cylinder rotatably arranged on the fixed shaft through bearings, a sponge cylinder wrapped on the outer surface of the cylinder, and a spraying module arranged on the outside of the L-shaped bracket and positioned directly above the sponge cylinder for spraying liquid deicer downward; The invention can uniformly apply the deicer on the ice covering of the distribution network line, the deicereffect is better, in addition, the deicer suitable for the deicer is provided, the freezing point is low, and the ice is melted in a short time.

The invention discloses an ice-melting agent for power transmission lines. The ice-melting agent is a powdery solid, and the ice-melting agent is mainly composed of the following components in terms of mass percentage: 53-60% sodium chloride , 20‑23% soda ash or sodium bicarbonate, 4‑7% ammonium chloride, 3‑6% potassium oxide and 11‑13% trichloroacetic acid. A kind of deicing agent used for power transmission lines provided by the present invention can achieve the technical effect of rapid deicing. At a temperature of 5°C, the deicing rate at the initial stage of deicing can reach 63.3 mL / min, which is far greater than that of chlorine The melting rate of 24.5 mL / min at the initial stage of ice-melting calcium-type ice-melting agent solves the shortcomings of existing ice-melting agents. At the same time, due to the existence of jelly, it can not only protect the transmission line, but also Prevent secondary icing of transmission lines and have excellent ability to deice and melt snow.

The invention discloses a CO2 heat pump device. The CO2 heat pump device comprises a compressor, a gas cooler, an oil heat exchanger, a first filter, a throttling device, an evaporator and a gas-liquid separator which are sequentially connected to a main heating circulation pipeline. The CO2 heat pump device further comprises an ice melting circulation pipeline, the compressor, a third filter, a second electromagnetic valve, the evaporator and the gas-liquid separator, wherein the compressor, the third filter, the second electromagnetic valve, the evaporator and the gas-liquid separator are connected to the ice melting circulation pipeline. When the bottom of the evaporator is frozen, the second electromagnetic valve is switched on, high-temperature and high-pressure CO2 gas enters an independent pipeline on the lower portion of the inside of the evaporator via the third filter and the second electromagnetic valve from an outlet of the compressor, an ice layer at the bottom of the evaporator can be molten, then generated heat CO2 steam returns to a gas return opening of the compressor via the gas-liquid separator, and thus ice melting circulation of the CO2 heat pump device can beformed. The CO2 heat pump device can operate at a low environment temperature, rapid ice melting can be achieved and heating operation of the system is made stable.

The invention discloses a method for starting a direct-current deicing system of an overhead ground wire and a compound optical fiber ground wire. A direct-current deicing device used in the starting method comprises a current changer, a direct-current disconnecting link and a control protective system, and the two ends of the overhead ground wire or the compound optical fiber ground wire needing to be deiced are directly connected with the positive pole and the negative pole of the current changer in the direct-current deicing device respectively through the direct-current disconnecting link, or are connected with the positive pole and the negative pole of the current changer in the direct-current deicing device respectively through any phase of conductors via the direct-current disconnecting link. The method for starting the direct-current deicing system comprises the steps of 1) overlaying a current value on a minimum permissible current to be used as a deblocking reference current during a period of time of giving out a deblocking command, 2) enabling the deblocking reference current to be linearly decreased to the minimum permissible current after the period of time, and 3) adopting a proportional-integral regulator to enable the current in a direct-current deicing circuit to track the deblocking reference current in the deblocking process. The method for starting the direct-current deicing system of the overhead ground wire and the compound optical fiber ground wire can ensure the fact that the direct-current deicing device can fast set up a stable direct current.

The invention provides an efficient road deicing agent and a preparation method thereof. The electrochemical comprises, by weight, 0.1-1 part of polyethylene oxide, 0.2-0.3 part of potassium acetate,100-150 parts of a plant ash lixivium, 2-5 parts of an emulgator, 0.3-0.5 part of sodium citrate, 0.02-0.05 part of mercapto benzothiazole, 0.01-0.03 part of sodium polyaspartate, 0.2-0.4 part of sodium tetraborate, 0.4-0.6 part of sodium lactate, 0.3-0.6 part of dicyclohexylaminenitrite and 3-5 parts of diatom ooze dry powder. The deicing agent is prepared through dissolution, stirring, heating,repeated freeze thawing and other methods, with sylvite as a main deicing component, the deicing agent does not contain chloridion for corroding metal, efficient deicing is achieved, corrosion of thedeicing agent on the metal and pavement and damage of water containing the deicing agent after snow melting to vegetation can also be effectively prevented, and the deicing agent is an energy-saving,environment-friendly and efficient deicing agent.

An LNG gasifier water spraying system comprises an LNG gasifier, a circulation water pool, a monitor device, a controller and a spraying device. The LNG gasifier is arranged on a base. A water guide trough connected with the circulation water pool is arranged around the base. Heating devices are independently mounted on the side wall and the bottom of the circulation water pool. The monitor devicecomprises a first temperature detector on a water inlet pipe, a second temperature detector in the circulation water pool and a liquid level detector. The controller controls opening and closing of avalve and the heating devices according to transmitted temperature signals and liquid level signals. Multiple water stop layers are arranged in the middle of a heat exchange pipe set on the gasifier.Fins of heat exchange pipes are spirally distributed in different forms. By means of the LNG gasifier water spraying system, heat exchange efficiency is greatly improved, the intelligent control method is adopted, the relations between water inlet heat, consumed heat, the water quantity and electric energy are balanced, natural water heat energy is utilized to the greatest extent, meanwhile, normal use is not influenced, automatic control can be achieved, and control precision is high.

The invention discloses an alternating-current (AC) de-icing method. In the method, a de-icing device comprising a body, a wiring pile head and wire reels is utilized; one side of the de-icing device is taken as a mains side of incoming lines and the other side of the de-icing device is taken as an output low-pressure side; coils of the output side are drawn out independently, drawing heads are accessed the pile head of the device, and multi-level voltage output are obtained by a certain connection mode; the wire reels are arranged at two sides of the device, input connecting leads are wound on one side of each wire reel and output connecting leads are wound on the other side of each wire reel; after the freeze generates, the tail ends of transmission lines are shortly connected; according to the length and requirement of the transmission lines, a proper wiring mode and a voltage output gear are selected, and then the head ends of the transmission lines are connected with the output low-pressure side of the de-icing device by transition of a single-core insulation cable; and the transmission lines generate heat by the output AC so as to reach the de-icing effect. The invention has the advantages that the de-icing speed is quick, the influences on users are slight, the de-icing cost is low and the human injuries do not happen, the device is small, the weight is light, the operation is simple, the running is convenient and the device capacity is unchanged.

The invention provides a power grid layout structure and system based on an ice-melting function. The power grid layout structure and system comprises a transformer non-melting side three-phase line providing an ice melting power source and a transformer melting side three-phase line; and two phase lines of the transformer melting side three-phase line are connected in parallel by a rotation conversion mode, and the two phases in parallel and the non-parallel phase form an operating loop, thereby reducing the impedance of the loop, and achieving the effects of extending the melting distance and increasing the melting speed. The power grid layout structure and system effectively solve the problem of ice melting in extreme weather such as ice disaster by means of parallel operation and phaseloss operation; compared with three-phase direct short-circuit ice melting, the power grid layout structure and system not only significantly prolong the melting distance, but also increases the three-phase ice melting speed more efficiently; and the power grid layout structure and system guarantee the ice melting effect of transmission and distribution lines of different voltage levels, are simple and easy in operation, low in safety risk and wide in the scope of application, greatly save the asset investment of power grid enterprises, and have high practicability.

The invention relates to a slice ice type ice maker and an ice storage air conditioning system thereof. The slice ice type ice maker comprises an ice making tank, a condenser, a compressor, a throttle valve, a four-way conversion valve and a delivery pump, and the ice making tank comprises an ice maker, a slice ice storage and transportation cabinet, a cabin door and a tank body; and the ice maker comprises a slice ice groove, an evaporation refrigeration wall, a refrigerant inlet header, a refrigerant outlet header, an ice making water inlet distribution pipe, a water spray nozzle and a spring bottom plate. The ice storage air conditioning system comprises the ice making tank, an ice storage cabinet, an ice crushing machine, a mixing and stirring tank, an ice water storage tank, a circulating pump and an air-conditioning user; and the slice ice maker is provided with an efficient heat transfer refrigeration wall, the ice making period is short, the unit ice making density is high, rapid slice ice making is achieved, the purposes of increasing production and efficiency and reducing production cost are achieved, meanwhile, the efficient ice crushing machine and the mixing and stirring tank are adopted in the ice storage air conditioning system, rapid and efficient large-capacity supply to the air conditioning system can be achieved, and good economic benefits and market competitiveness are achieved.

The invention provides an equipment ice melting method, device and system based on the microwave technology. The method obtains ice layer information of ice frozen equipment and determines the microwave frequency of ice melting according to the ice layer information of the ice frozen equipment and then determines an ice melting mode according to the ice layer information of the ice frozen equipment and the microwave frequency of the ice melting. The system comprises a sensing unit used to acquire the ice layer information of the ice frozen equipment; a microwave generating unit used to smoothly output high-power microwaves; a steam generating unit used to generate steam by radiation heating of a monopole oscillator antenna; ice melting unit for performing ice melting; and a control unit for performing the ice melting according to the method. The invention is suitable deicing of non-power-transmission lines, realizes jointly implementation of four types of ice-melting modes such as microwave radiation ice melting, microwave electrode ice cutting, microwave steam ice melting and microwave steam ice cutting so as to achieve safe, fast and highly-efficient electrical equipment deicing.

The invention discloses an environment-friendly ice melting agent prepared by using waste acetic acid produced in dimethyl phthalate production and a preparation method thereof. The environment-friendly ice melting agent is a liquid product, wherein the total mass percent of acetate is 10-40%, the total mass percent of sodium dihydrogen phosphate is 0.05-1%, the total mass percent of sodium silicate is 0.05-1%, the total mass percent of sodium tartrate is 0.01-0.05%, and the 0.001-0.5wt% pigment can be added in the product. The production process is simple and mainly comprises strong alkali saponification and activated carbon adsorption treatment, the corrosion inhibition component is compounded to realize the comprehensive utilization of waste acetic acid which is hard to treat. The environment-friendly ice melting agent prepared by the invention is free from extraneous odor and low in ice point, the ice melting capacity is more than 150% of that of sodium chloride, the corrosivity to the steel is less than 10% of sodium chloride, and the ice melting agent basically cannot corrode the concrete, the plurality of indexes are superior than those of the common acetate type environment-friendly ice melting product CMA at present.

The invention discloses a carbon dioxide heat pump device, which comprises a compressor, a gas cooler, an oil heat exchanger, a first filter, a throttling device, an evaporator, and a gas-liquid separator sequentially connected to a main heating cycle pipeline. The CO 2 The heat pump device also includes an ice-melting circulation pipeline and a compressor connected to the ice-melting circulation pipeline, a third filter, a second electromagnetic valve, an evaporator, and a gas-liquid separator. When the bottom of the evaporator freezes, the second Solenoid valve, high temperature and high pressure CO 2 The gas passes through the third filter and the second solenoid valve from the outlet of the compressor, and enters the independent pipeline in the lower part of the evaporator to melt the ice layer at the bottom of the evaporator, and then the generated heat CO 2 The vapor returns to the gas return port of the compressor through the gas-liquid separator to form CO 2 Melting cycle of heat pump unit. CO of the present invention 2 The heat pump device operates at a low ambient temperature, which can realize rapid ice melting and make the heating operation of the system stable.

An LNG gasifier water spraying system comprises an LNG gasifier, a circulation water pool, a monitor device, a controller and a spraying device. The LNG gasifier is arranged on a base. A water guide trough connected with the circulation water pool is arranged around the base. Heating devices are independently mounted on the side wall and the bottom of the circulation water pool. The monitor devicecomprises a first temperature detector on a water inlet pipe, a second temperature detector in the circulation water pool and a liquid level detector. The controller controls opening and closing of avalve and the heating devices according to transmitted temperature signals and liquid level signals. Multiple water stop layers are arranged in the middle of a heat exchange pipe set on the gasifier.Fins of heat exchange pipes are spirally distributed in different forms. By means of the LNG gasifier water spraying system, heat exchange efficiency is greatly improved, the intelligent control method is adopted, the relations between water inlet heat, consumed heat, the water quantity and electric energy are balanced, natural water heat energy is utilized to the greatest extent, meanwhile, normal use is not influenced, automatic control can be achieved, and control precision is high.

The invention relates to a high voltage large power resonance frequency conversion deicing device and method which is capable of improving the frequency of a line loading circuit from an industrial frequency of 50Hz to 1000-1800Hz according to the principle that a lead wire generates skin effects under a high frequency situation, and the resistance of the corresponding line is increased by about 5 times, the current transmitted by the line under the condition of a same deicing power is reduced, so as to reduce the overcurrent hardness of the line; the principle of LC series resonance is simultaneously utilized by connecting a resonance capacitor reaction at the connection position of a power electric frequency conversion device and the line to lead the equivalent inductance of the power electric frequency conversion device and the line, thus realizing series resonance under the current of 1000 to 1800Hz. In order to realize series resonance between the equivalent inductance of a line under the situation with incorrect line data and the series capacitor, a self adaptive frequency adjusting technique is adopted in the invention to lead the line to be operated at a resonance point. The device of the invention is suitable for deicing three-phase and single-phase lines; a constant current control method can ensure the stability of deicing; an advanced phase-split control method canensure the device to be suitable for the simultaneous deicing of the three-phase line with different parameters.

The invention discloses a transmission line ice melting device, belonging to the technical field of transmission line maintenance, which comprises a moving tool car, a supporting mechanism and an icemelting mechanism. The mobile tool vehicle is provided with a centrifugal pump and a liquid storage cylinder storing liquid ice-melting agent, wherein the liquid storage cylinder is connected with theinlet of the centrifugal pump through an inlet pipe, and the outlet of the centrifugal pump is connected with the lower end of the Y-shaped outlet pipe; The support mechanism comprises a base and a support frame arranged on the base; The support frame comprises a first support bar, a second support bar and a Y-shaped fixing groove; The ice melting mechanism comprises a U-shaped first nozzle and an inverted U-shaped second nozzle, wherein a first branch of the outlet pipe is connected with the first nozzle, and a second branch of the outlet pipe is connected with the second nozzle. The invention can completely cover the circuit, thoroughly melt ice, and additionally provides a melting agent suitable for the melting device, which has low freezing point, fast melting rate in a short time, remarkable melting effect, and little harm to carbon steel and plants.

The invention discloses an ice-melting device, which is used for a traction power supply system and a track. , a contact rail connecting line, a traveling rail connecting line, and a switch constitute a group of ice-melting units, which are correspondingly installed at a depot substation; each contact rail connecting line transforms the depot where it is located. The upper contact rail and the down contact rail are connected in series, and the upper contact rail and the down contact rail are also connected in series with the DC ice-melting mechanism through a switch to form a contact rail circuit unit; similarly, a walking rail circuit unit is formed; each DC ice-melting mechanism The contact rail circuit unit and the traveling rail circuit unit are switched and connected by a switch for alternate power supply; the ice-melting device for the traction power supply system and the track proposed by the present invention does not affect the normal operation of the train and is suitable for trains in operation icing treatment.

The invention provides an efficient road deicing agent and a preparation method thereof. The electrochemical comprises, by weight, 0.1-1 part of polyethylene oxide, 0.2-0.3 part of potassium acetate,100-150 parts of a plant ash lixivium, 2-5 parts of an emulgator, 0.3-0.5 part of sodium citrate, 0.02-0.05 part of mercapto benzothiazole, 0.01-0.03 part of sodium polyaspartate, 0.2-0.4 part of sodium tetraborate, 0.4-0.6 part of sodium lactate, 0.3-0.6 part of dicyclohexylaminenitrite and 3-5 parts of diatom ooze dry powder. The deicing agent is prepared through dissolution, stirring, heating,repeated freeze thawing and other methods, with sylvite as a main deicing component, the deicing agent does not contain chloridion for corroding metal, efficient deicing is achieved, corrosion of thedeicing agent on the metal and pavement and damage of water containing the deicing agent after snow melting to vegetation can also be effectively prevented, and the deicing agent is an energy-saving,environment-friendly and efficient deicing agent.

The invention discloses a medium- and small-sized high-temperature-difference double-working-condition dynamic ice-slurry cold storage air conditioner. A refrigerating circulating device comprises a water cooling type evaporator and ice crystal devices, an air conditioning circulating device comprises an ice storage tank, and a water outlet of the bottom end of the ice storage tank is communicated with an ice making circulating pump and a flow meter sequentially; a pipeline of a water outlet of the flow meter is divided into two branches, water outlets of the upper ends of the ice crystal devices are communicated with the ice storage tank via first water outlet pipelines, a water outlet of the water cooling type evaporator is communicated with a water inlet of the ice storage tank via a second water outlet pipeline, one end of an ice melting circulating pipeline is communicated with an inlet of a sprayer, and the other end of the ice melting circulating pipeline is communicated with a second water outlet of the ice storage tank via a secondary heat exchanger. One end of an air-conditioner water inlet pipe is communicated with a third water outlet of the ice storage tank, and the other end of the same is communicated with a water inlet of an air-conditioner tail-end heat exchanger. One end of an air-conditioner water outlet pipe is communicated with a water outlet of the air-conditioner tail-end heat exchanger. The medium- and small-sized high-temperature-difference double-working-condition dynamic ice-slurry cold storage air conditioner can manufacture ice slurry for ice cold storage and can be used as a common air conditioner.