1760 results about "Dry ice" patented technology

Devices and methods for cooling vessel walls to inhibit restenosis in conjunction with medical procedures such as coronary artery angioplasty. Stenosed vessel walls can be cooled prior to angioplasty, after angioplasty, or both. The invention is believed to inhibit restenosis through cooling to a temperature near freezing, preferably without causing substantial vessel wall cell death. One catheter device includes a distal tube region having coolant delivery holes radially and longitudinally distributed along the distal region. In some devices, holes spray coolant directly onto the vessel walls, with the coolant absorbed into the blood stream. In other embodiments, a balloon or envelope is interposed between the coolant and the vessel walls and the coolant returned out of the catheter through a coolant return lumen. Some direct spray devices include an occlusion device to restrict blood flow past the region being cooled. Pressure, temperature, and ultrasonic probes are included in some cooling catheters. Pressure control valves are included in some devices to regulate balloon interior pressure within acceptable limits. In applications using liquid carbon dioxide as coolant, the balloon interior pressure can be maintained above the triple point of carbon dioxide to inhibit dry ice formation. Some cooling catheters are coiled perfusion catheters supporting longer cooling periods by allowing perfusing blood flow simultaneously with vessel wall cooling. One coiled catheter is biased to assume a coiled shape when unconstrained and can be introduced into the body in a relatively straight shape, having a stiffening wire inserted through the coil strands.

Devices and methods for cooling vessel walls to inhibit restenosis in conjunction with medical procedures such as coronary artery angioplasty. Stenosed vessel walls can be cooled prior to angioplasty, after angioplasty, or both. The invention is believed to inhibit restenosis through cooling to a temperature near freezing, preferably without causing substantial vessel wall cell death. One catheter device includes a distal tube region having coolant delivery holes radially and longitudinally distributed along the distal region. In some devices, holes spray coolant directly onto the vessel walls, with the coolant absorbed into the blood stream. In other embodiments, a balloon or envelope is interposed between the coolant and the vessel walls and the coolant returned out of the catheter through a coolant return lumen. Some direct spray devices include an occlusion device to restrict blood now past the region being cooled. Pressure, temperature, and ultrasonic probes are included in some cooling catheters. Pressure control valves are included in some devices to regulate balloon interior pressure within acceptable limits. In applications using liquid carbon dioxide as coolant, the balloon interior pressure can be maintained above the triple point of carbon dioxide to inhibit dry ice formation. Some cooling catheters are coiled perfusion catheters supporting longer cooling periods by allowing perfusing blood flow simultaneously with vessel wall cooling. One coiled catheter is biased to assume a coiled shape when unconstrained and can be introduced into the body in a relatively straight shape, having a stiffeninig wire inserted through the coil strands.

The invention relates to a device for comminuting dry ice granules, comprising a housing having a flow channel for dry ice granules which can be applied, by means of compressed gas, to a surface to be cleaned, and also comprising a first comminution member for comminuting the dry ice granules which are to be dispensed. In order to provide a device of this kind with which different degrees of comminution of dry ice granules can be achieved in a simple manner, it is proposed according to the invention that the device has at least one second comminution member which can be disposed in the housing in a position in which a total degree of comminution, which is greater than the individual degree of comminution which can be achieved solely by the first comminution member, can be achieved in combination with the first comminution member. A dry ice dispensing arrangement for dispensing a mixture of compressed gas and dry ice granules is also proposed, having a device of the above kind.

The invention is directed to a reusable container for transporting blood and blood products providing the ability to not only transport, but also to monitor and maintain refrigerated blood or blood products at optimal temperature range for more than twenty-four (24) hours without the use of wet or dry ice, or gel packs.

A temperature regulation apparatus includes a dry ice module that encloses dry ice so that the module's outside surface is not hazardous to touch. Insulation, breathable material, or a combination of insulating and breathable materials, allows dry ice sublimation at a sufficiently slow rate within the attached dry ice module to control the ambient temperature in the area to be cooled. The dry ice module can be attached in a location that maximizes the dry ice cooling properties, typically at or near the top of the area to be cooled. Since sublimated carbon dioxide is heavier than normal air, it falls to the bottom of the area to be cooled and builds up. The venting placement in the dry ice module is based upon the make up of the dry ice module and the breathable materials inside of it.

Polycrystalline silicon of the invention contains: (a) polycrystalline silicon fragments, wherein at least 90% of the fragments have a size from 10 to 40 mm, (b) <15 ppmw of silicon dust particles having particle sizes <400 μm; (c) <14 ppmw of silicon dust particles having particle sizes <50 μm; (d) <10 ppmw of silicon dust particles having particle sizes <10 μm; (e) <3 ppmw of silicon dust particles having particle sizes <1 μm; and (f) surface metal impurities in an amount ≦0.1 ppbw and ≧100 ppbw. A polycrystalline silicon production method of the invention includes fracturing polycrystalline silicon deposited on thin rods in a Siemens reactor into fragments; classifying the fragments by size; and treating the fragments with compressed air or dry ice to remove silicon dust from the fragments without wet chemical cleaning.

The invention discloses a method which utilizes natural gas pressure energy; namely, the pressure and the temperature of the natural gas in a high pressure pipeline are reduced by a no-power refrigerator so as to gain low temperature natural gas which then exchanges the heat with a normal-temperature refrigerant which is sent by a normal-temperature tank; the low temperature refrigerant with temperature reduced enters a refrigerant storage tank for standby and is finally delivered to a cold energy user; the normal-temperature natural gas with temperature increased enters the pipeline. The method which utilizes natural gas pressure energy has convenient and practical whole process technique and high efficiency, spends little investment on the self-pressure energy in the pressure reduction process of the high pressure natural gas which is recovered by a pressure modulating station, converts the pressure energy into the cold energy with low operation cost, leads the cold energy to be used by cold quantity users of cold storages, cold water air conditioners, wasted rubber deep-cold crushing round the pressure modulating station by means of the refrigerant, etc., or to be made into ice blocks and dry ice products for abroad sale, etc., thus gaining huge economic benefits, improving the utilization ratio of the energy resource and eliminating the safe hidden trouble which is generated by sudden coolness of the equipment in the normal pressure modulating process.

The invention relates to a dry ice sublimation hole bottom refrigerating and pressure keeping sampler and a sampling method. The device is mainly composed of a suspension differential action mechanism, a single action mechanism, a control mechanism, a refrigerating mechanism and a pressure keeping mechanism. The method comprises: using dry ice as refrigerant, alcohol as refrigeration assisting catalyst and secondary refrigerant, and applying low temperature alcohol to the hole bottom to refrigerate the rock core; closing a ball valve to keep pressure of the rock sample so as to inhibite the decomposition of the hydrate rock core; dismounting a blocking tube and a drill bit when sampling, dismounting a clamp spring and a clamp spring seat, pulling out a half combining tube and the rock core from the rock core tube, and using a liquid nitrogen holdup vessel or a high pressure container to keep the rock core sample. When drilling for sampling the rock core, the external tube and the drill bit gyre, but the internal tube assembly does not gyre, thus avoiding the damage of mechanical force to the rock core caused by the gyrus of the drilling tool to a larger degree, improving the rock core sampling rate, integrity and representativeness more effectively, and realizing pure refrigeration sampling as well as a combination of refrigeration sampling and rock core pressure keeping; compared with the prior art, the invention has simple process, convenient operation and greatly reduces the cost.

A combined clothing garment and air-cooling device may include a vest and helmet adapted to removably position about a user's body. The garments may include spaced insulation layers with an internal chamber formed therebetween. A mechanism may be included for selectively introducing air into the internal chamber. The mechanism may include entry ports in the outer layer and an air-intake vent positioned over the entry ports manually toggled open and closed. Another mechanism may be included for cooling the air within the internal chamber and channeling cooled air out. An access panel preferably has windows along its longitudinal length and may be slidably interfitted within the body and linearly displaced open and closed to permit and prohibit air from entering. A cooling agent containing dry ice may be removably contained within internal tubing for lowering air temperature.

The invention relates to a method for producing high-strength thin strip steel in a short process. Twin roll strip casting is adopted for producing an atmospheric-corrosion-resistant steel casting belt containing a rare earth element Re, hot rolling, cooling and anti-oxidation intensive cooling scale removing are performed on the steel casting belt, and then the steel casting belt is reeled up after being straightened, wherein in the hot rolling process of the strip steel, rolling reduction is not smaller than 20%, and finishing rolling temperature is 850-1000 DEG C; then, a staged cooling mode of atomization cooling plus anti-oxidation intensive cooling ( spraying dry ice) is adopted, and intensive cooling is carried out on the high-temperature strip steel, wherein the cooling rate in the atomization cooling process is 50-100 DEG C / s, and the cooling rate in the anti-oxidation intensive cooling process is 100-200 DEG C / s. In this way, through the combined type staged cooling, the uniform steel of a bainite microscopic structure can be obtained, and the bainite structure can remarkably improve the toughness of the steel. The method is especially applicable to atmospheric-corrosion-resistant high-strength thin strip steel with the surface roughness Ra smaller than 2 microns, the thickness of typical strip steel is 0.8-1.6mm, and the strip steel can be supplied in a hot mode instead of a cool mode.

The invention relates to a robot which is suitable for cleaning and sterilizing under a plurality of environments and comprises a car body with crawler belts arranged at two sides, a rotatable observation hood is arranged at the top surface of the rear part of the car body, two sides of the front part of the car body are respectively provided with an obstacle-climbing arm, the front part of the car body is provided with a mechanical arm connection socket which is provided with jacks, the mechanical arm connection socket is arranged on the car body by support shafts at two sides, and the support shaft at one side is connected with a main shaft of a third driving motor by a driving gear pair. The robot also comprises a steam cleaner, a dust collector, a hair brusher, a disc brush, a high-pressure water gun, an air blower, an air lasher, a dry ice cleaner, a sterilizer and a mechanical shovel which are arranged on the car body according to requirements for working. The robot can climb obstacles, such as steps, and the like, has a plurality of functions of clearing, blowing, lashing, mechanical shovel, dust-collecting, sterilizing, and the like, can be also controlled by a notebook computer, and has the advantages of good working effect, stable device performance, convenient operation, high efficiency, simple and compact structure, light weight, convenient carrying, and the like.

The invention relates to a dry ice cleaning vehicle of electrical equipment external insulation, belonging to the cleaning equipment of the electrical equipment external insulation. A lifter (7) is fixed on a vehicle body (8); the top end of the lifter (7) is provided with a lift platform (3) on which an insulation telescopic arm (2) is arranged; the telescopic end of the insulation telescopic arm (2) is connected with an automatic dry ice particle track sprinkler head assembly (1); and a dry ice conveying insulation duct (4-1) on a dry ice conveying device (4) is communicated with a sprinkler head (1-8) on the automatic dry ice particle track sprinkler head assembly (1). The invention has the advantages of compact structure, larger inclusive area for cleaned objects, almost no cleaning dead corner, large one-step cleaning surface, high cleaning quality, convenient operation and high dirt removal efficiency, thereby being especially suitable for the cleaning work of vertically arranged cylindrical insulating equipment, such as insulators or sleeve pipes. The invention can be used as high-efficiency cleaning equipment for safe electric power production and electric power supply guarantee and has favorable social and economic benefits.

The invention discloses a sprayer device for cleaning a brace insulator with dry ice, which comprises a fixing mechanism, a rotating mechanism, a driving device and a cleaning sprayer, wherein the fixing mechanism comprises a fixing frame and a guide rail; the driving device is mounted on the lower part of the guide rail; the rotating mechanism passes through the interior of the guide rail; a guiding wheel of the rotating mechanism is arranged on the guide rail; the rotating mechanism main body is an arc-shaped light rail; a rack which is engaged with a spindle gear of the driving device is arranged outside of the rack; position limiting switches are arranged at two sides of the rack; cleaning sprayers are arranged at two ends of the rotating mechanism; and the device is mounted on a lifting mechanism of a cleaning device through the fixing frame. The device has the advantages of simple structure, flexibility in operation, high cleaning efficiency, and is easily controlled and is fit for cleaning the brace insulator with dry ice. By adopting a crossed double sprayer, the upper and lower surfaces of an umbrella skirt of the brace insulator can be efficiently cleaned without a dead angle. Aiming at the brace insulators in different voltage levels, sprayer modules in different sizes are designed. The device can be applied according to the actual materials, so as to achieve the best cleaning effect. Besides, the electric on-line cleaning can be realized.

A nozzle for spraying sublimable solid particles and preventing frost from forming at surfaces of the nozzle. The nozzle includes: a cleaning agent block for phase-changing a cleaning agent into a snows containing sublimable solid particles; a nozzle block for growing the cleaning agent snow through adiabatic expansion and spraying the grown cleaning agent snow onto a surface of an object; a carrier gas block for supplying a carrier gas to the nozzle block to mix with the cleaning agent snow; and a heater for heating at least a portion of the carrier gas supplied from the carrier gas supply source. Fine dry ice particles and liquid CO2, passing through a solenoid valve from a CO2 reservoir tank and a pressure drop of a flow rate regulation valve, are introduced into the spray nozzle and then mixed with the carrier gas, such as N2 or purified air, and discharged.

Provided are boron-containing weather-proof thin strip steel and a manufacturing method thereof. The manufacturing method comprises performing double roller thin strip continuous casting to produce boron-containing weather-proof steel; after a cast strip is processed through a crystallizing roller, adopting a mode of spraying dry ice to perform uniform strengthened cooling on the cast strip, rapidly cooling the cast strip to below 1,280 DEG C, and enabling the cooling speed to be 200-300 DEG C / s, so that precipitation of thick and large BN in the cooling mode is promoted, emergency of low-melting-point-phase B203 and precipitation of tiny AlN are avoided, and the aims of homogenizing austenite grains and reducing yield ratio are achieved; then performing austenite on-line recrystallization rolling; then performing anti-oxidizing rapid cooling to cool the strip steel undergoing hot rolling, and enabling the cooling temperature to be 80-200 DEG C / s; and enabling coiling temperature to be 500-600 DEG C. Steel with low yield ratio can be obtained through the manufacturing method, and the problems that steel produced by thin strip continuous casting are universally uneven in structure, high in yield ratio and difficult to form and cannot meet the requirements for cold rolling materials are effectively solved.

The invention relates to a method for vulcanized rubber regeneration by desulfurization and depolymerization, and belongs to the rubber cyclic regeneration field. The method comprises the following steps: first obtaining supercritical carbon dioxide by adding dry ice in a high pressure reaction kettle in safe and rapid manner, realizing rapid pollution-free permeation of desulfurization reagent into the rubber by the supercritical CO2, then breaking cross bonds of the rubber by cooperation of mechanical shearing, temperature and the desulfurization agent so as to realize desulfurization and regeneration of the rubber. The regenerated rubber has the advantages of safety, rapid performance, low energy consumption, no pollution, and good recycling effect.

A cooling, carbonation and dispensing system for use with a liquid in a keg includes a cooling ring mounted on top of the keg. The cooling ring includes a toroidal-shaped shell into which dry ice is placed. The cooling ring and dry ice provide contact cooling of the keg, as well as carbon dioxide gas by sublimation of the dry ice to carbonate the liquid in the keg and pressure on the liquid so that it may be dispensed from the keg. A chilling unit having a hose bundle is mounted on top of the cooling ring. A liquid dispensing hose from the keg coupler on the keg connects to the hose bundle, so that liquid from the keg passes through the hose bundle. A lid having a tower is attached to the top of the chilling unit and latched to it to form a water-tight seal. Another hose connects to the hose bundle in the chilling unit and conducts the liquid to a dispensing hose attached to a dispenser in the tower. Wet ice is placed in the chilling unit and the tower to provide further chilling (flash chilling) of the liquid. The components of the assembled system may be wrapped in an insulating blanket to provide further cooling.

The invention relates to a foam drainage gas recovery method used for a natural gas horizontal well. The method is capable of injecting a foam scrubbing agent into the bottommost end of a gas well shaft, so that the whole shaft is filled with foam fluid and optimal drainage gas recovery effect is achieved. The technical scheme of the method comprises the following steps: firstly, manufacturing a dynamical underground foam scrubbing bar which consists of a gas nozzle, a tail wing, a boosting agent, a shell and a protection head sleeve, wherein the material for manufacturing the tail wing, the shell and the protection head sleeve is the solid foam scrubbing agent which consists of polyoxyethylene alkyl ethers, polyethylene glycol, urea, imidazoline, sodium dodecyl benzene sulfonate and saturated alcohol sulfate; and the boosting agent is one of dry ice, sodium hydride or potassium oxide; and secondly, throwing the dynamical underground foam scrubbing bar to the bottom of the well, wherein the boosting agent is in contact with water to generate a large amount of gas, so that the foam scrubbing bar is pushed to the bottommost end; and as the foam scrubbing agent is dissolved, a large amount of foam is formed to achieve the optimal effect of drainage gas recovery. The method disclosed by the invention has a wide application range without any wellhead equipment and energy, is simpleand safe in operation, low in cost and has no pollution to the environment.

An apparatus for treating a substrate with a cryogenic impingement fluid includes a protective enclosure defining an internal cavity, a cryogenic fluid applicator positioned within the internal cavity and a snow generation system connected to the cryogenic fluid applicator. The snow generation system includes a condensing subsystem and a diluent or propellant gas subsystem. Each subsystem is connectable to a common gas source. The condensing subsystem includes a condenser for condensing liquid carbon dioxide into solid carbon dioxide particles, or dry ice snow. The condenser includes at least two segments of differing diameter connected to one another. Liquid carbon dioxide is introduced into the smaller diameter first segment and upon entering the larger diameter second segment, solidifies into dry ice particles. The dry ice particles, along with diluent or propellant gas produced from the diluent subsystem, are delivered to the cryogenic fluid applicator via a coaxial delivery tube.

The invention discloses an insulator surface aged RTV paint eliminating method and device. The insulator surface aged RTV paint eliminating method comprises the following steps: a walking type platform is placed at a preset position, and a revolving platform rotates to make a dry ice cleaning device be located under an insulator; a shear fork lifting device drives the dry ice cleaning device to rise so that the dry ice cleaning device and the insulator can be at the same height; an insulating telescopic device extends out to make the dry ice cleaning device be close to the insulator; after being aligned with the insulator, the dry ice cleaning device ejects a mixture of dry ice and high pressure gas to clean the insulator. The insulator surface aged RTV paint eliminating method and device have a good effect in removing aged RTV paint and cannot affect the environment.

The invention relates to high-strength thin band steel for cold forming and a manufacturing method thereof. The method comprises the following steps: after discharging a cast band from a crystal roll, cooling the cast band forcibly and uniformly in a mode of spraying dry ice under high pressure; quickly cooling the cast band to be below 1,280 DEG C at the cooling speed of 200-300 DEG C / s; performing austenite on-line recrystallization rolling, wherein the rolling temperature is 1,050 to 1,200 DEG C and the rolling reduction is 20 to 50 percent; and quickly cooling the band steel subjected to hot rolling in an anti-oxidation mode, wherein the anti-oxidation quick cooling speed is 80 to 200 DEG C / s and the reeling temperature is 500 to 600 DEG C. By the method, the high-strength thin band steel for automobile cold forming and with low yield strength and excellent stamping performance can be obtained, can be directly used in a mode of substituting heat for cold, cancels the cold rolling procedure and greatly reduces the production cost.

The invention relates to a method for cleaning a turbo-machine stage (100) consisting of at least one of the following steps: a cleaning nozzle (1) is introduced into an opening of a turbo-machine, in particular into an inspection opening (220); and the blade (100) of the stage is acted upon by solid particles, said particles subliming at the blade temperature, in particular into dry ice particles.

Blast-cleaning systems are disclosed, which enable a single system to handle different classes of particulate blasting media, such as grit, powder, and dry ice, and to deliver controllable mixtures of different media types during a blasting operation. This “multi-media” system includes a hopper having two chambers or other supply assemblies that are isolated from each other, for holding two different types of blasting media. Both chambers provide their particulates to a metering control device, which supplies a compressor. For example, by combining grit with dry ice, extremely efficient cleaning can be accomplished, with greatly reduced production of solid waste. Tests have shown that combinations of dry ice (at roughly 90%) with a grit or powder can provide far greater cleaning efficiency than either media type by itself.

A drinking vessel includes an interior portion that holds pellets or chips of dry ice that cool a beverage in the glass while the beverage is being consumed. The interior portion can be a part of the glass or it can be a detached piece usable in different vessels. Either way the interior portion includes holes that allow the beverage to freely flow around the dry ice while the holes are small enough to prevent the dry ice from entering the portion of the vessel where it could be accidentally consumed.

A case for a galley cart defines a cavity with at least two dividers positioned within the cavity, each having a first end edge and an opposing second end edge, with the dividers defining at least two chambers within the cavity. A door is movably attached to the case having a first position in which the cavity is accessible and a second position in which the cavity is substantially sealed. The door incorporates a housing having at least one cooling puck corresponding to at least a first one of the chambers and a second cooling puck corresponding to a second one of the chambers. At least one sealing member is coupled to the housing in the door and configured to compress against the first end edges of the dividers and to provide flow communication between the first cooling compartment and the first chamber and between the second cooling compartment and the second chamber when the door is in the second position.

The invention relates to a gas expansion natural gas pressurized liquefying technique with a function of condensing and removing carbon dioxide (CO2), which comprises the steps of: precooling natural gas at a gaseous state in a precooler, continuously cooling the natural gas in a crystallizing device, condensing and separating solid dry ice while lowering the content of the CO2 to 0.5 percent, then pressurizing the natural gas in a low-temperature compressor, then introducing the natural gas in a liquefying device and liquefying the natural gas under higher pressure and then introducing the liquefied natural gas into a storage tank for storing. The cold capacity needed by the liquefying process is supplied by an independent gas expansion refrigeration circulation. Compared with the prior art, the gas expansion natural gas pressurized liquefying technique has the advantages that: a CO2 pretreatment device occupying a large floor area in the conventional natural gas liquefying process can be saved, so that the investment cost for liquefying the natural gas on an offshore platform in high price can be greatly reduced. Meanwhile, the energy loss of the refrigeration circulation can be reduced when the natural gas is liquefied at a higher temperature.

The invention discloses a external-insulation dry-ice cleaning system for electrical equipment, which belongs to the technical field of the external-insulation dirt removal of electrical equipment of an electrical system. The external-insulation dry-ice cleaning system adopts the structure that a dry-ice particle spray nozzle (1), an insulating adjustable bracket (2), a dry-ice transmission insulating pipe (3), a dry-ice cleaning device (5), an air compressor (6) and an air dryer (7) are sequentially connected with each other front and back, wherein the dry-ice particle spray nozzle (1), the insulating adjustable bracket (2), an insulating bracket regulating lever pipe (4) and a bracket regulating power device (8) are sequentially connected with each other from front and back, a dry-ice making granulating machine (10) is connected with a liquid carbon dioxide storage tank (11), a dry-ice insulation can (12) is independent equipment, and an earthing base (9) is taken as a safe earthing pedestal of the external-insulation dry-ice cleaning system. The invention has high dirt removing efficiency, is suitable for the on-line cleaning of an insulating sleeve and an insulating mainstay or an erected transmission line insulator inside a transformer station, and is an effective measure for safely generating the electricity and ensuring the electricity supply.

The invention belongs to the filed of biopolymer material synthesis, relates to a preparation method of a polyethylene glycol monomethyl ether-dl-polylactic acid block copolymer. The method includes the following steps of: adding a solvent with volume more than 3-6 times of total weight of reagents into a dried reactor, adding stannous octoate as a catalyst, and polyethylene glycol monomethyl ether and dl-lactide whose weight ratio is in the range of 65:35 to 20:80, introducing nitrogen, removing air, then heating and reacting, pouring a product into a compound of petroleum ether-carbon dioxide dry ice, simultaneously, violently stirring, obtaining the needed product after drying a white filtered solid in a vacuum drying oven. The new-type solvent is used in the invention, and a novel purification processing method is provided and is simple and easily controlled, the copolymer with a certain amount of molecular weight can be synthesized according to the specified requirement, and the requirement of further producing a pharmaceutical preparation is met.