Abstract: The removal of particulate contaminants adhering to a surface has been investigated using a dry ice blasting system. Monosized spherical latex particles of micron and submicron sizes were used as particulate contaminants, while the dry ice jet was produced by the thermal expansion of liquid carbon dioxide (CO2). Removal of the contaminants was observed in situ using a high-speed microscope camera and quantified through digital image analysis. The experimental results showed that dry ice blasting performs well for surface cleaning, which is attributed to the collision of the dry ice particles with the contaminants. For submicron-sized contaminants, a lower temperature jet was required in order to produce a larger number of dry ice particles to enhance the removal efficiency. The removal efficiency increased with an increase of the jet pressure on the surface. In addition, a theoretical analysis of the moments of forces caused by particle impact and aerodynamic drag showed that particle impact is primarily ...

Abstract: Here, a novel multipurpose heat exchanger was designed and fabricated based on dry ice–ethylene glycol bath as the coolant mixture in order to characterize the operating parameters for fast chilling of the fluids with low electrical consumption. Moreover, it was shown that the cooling rate and chilling temperature strongly depend on the initial fluid temperature, loading rate, heat rate and the volume ratio of the glycol coolant to the fluid accordingly.

Abstract: We put forward a method to remove pollution on insulator surface by dry ice in order to get a safe and effective way to clean the insulator surface.This method can be used to do live-line work without the risk of pollution flashover.To compare the performances under different conditions,an experimental platform is constructed.Moreover,effects of dry ice cleaning in the different parameters such as angles,distance,rate of dry ice flow,and different pollutions are compared and analyzed through experiments.Furthermore,the optimum combination of the parameters is determined,and the advantage of dry ice in insulator cleaning is verified by non-artificially and artificially polluted insulators experiments.The results indicate that dry ice cleaning can well work and has higher efficiency in insulator surface cleaning.

Abstract: The invention discloses a method for manufacturing carbon microspheres by using waste macromolecules as raw materials. The method is characterized by comprising the following steps of: sealing 75 to 300g/L of waste polyester, polypropylene or polyethylene and 300 to 600g/L of dry ice into a stainless steel autoclave based on the volume of the autoclave, heating the mixture to between 500 and 650 DEG C, preserving the heat for 180 minutes, and then cooling the mixture to room temperature to obtain micro-scale carbon spheres; annealing the prepared micro-scale carbon spheres for 1 hour under the vacuum condition of 1,500 DEG C to further obtain laminated carbon microspheres; and performing oxidation treatment of a Hummers method on the laminated carbon microspheres for 24 to 72 hours to obtain ellipsoidal laminated graphite carbon oxide microspheres. The method can improve the yield of solid carbon and greatly reduce the formation of carbon dioxide, and is suitable for industrialized production; and the obtained product has wide application prospect in the fields of adsorption and desorption, lithium ion batteries, catalyst carriers and the like.

Abstract: The invention discloses dry ice cleaning operation equipment for pipelines. Low-temperature dry ice (solid carbon dioxide) is used for cleaning oil stain or dirt on the walls of the pipelines in the equipment, wherein the oil stain or the dirt is decomposed in gasification and expansion of dry ice; and a dry ice cleaning machine for lampblack pipelines consists of a dry ice storing device, an air compressor, a dry ice double-nozzle rotating mechanism, a mechanical arm, a rotating platform, a pipeline crawler, a human machine interface control system and the like serving as main components. The cleaning machine is suitable for cleaning various pipelines of different structures, different calibers and variable diameters.

Abstract: This study was conducted to evaluate the effects of irradiation temperature on the physicochemical and sensory properties of Tarakjuk, milk porridge. Tarakjuk was gamma-irradiated at different temperatures of (in room), (in ice), and (in dry ice) at a dose of 10 kGy, and then autoclaved at for 15 min for comparison. pH and Hunter`s color value of Tarakjuk were not changed by irradiation regardless of the temperature. However, the TBA (2-thiobarbituric acid) value decreased as irradiation temperature was decreased. The viscosity of Tarakjuk irradiated in dry ice was significantly higher than that irradiated at room temperature and in ice (p

Abstract: The utility model discloses a powder type cleaning machine capable of scraping a dry ice block, and relates to a single-choke dry ice cleaning device, in particular to a single-choke dry ice cleaning device adopting dry ice powder scraped from dry ice blocks as a jetting medium. The structure of the powder type cleaning machine capable of scraping the dry ice block is as follows: a material wheel is arranged in a machine body framework through a fixing frame; one end of the lower part of the material wheel is connected with a jetting tube; the other end of the material wheel is connected with an intake tube; a speed reducer is connected with the material wheel through a machine shaft; a dry ice slot is mounted at the upper part of the fixing frame and is connected with the upper part of the material wheel through a collection hopper; a push plate is mounted on the internal side wall of the dry ice slot through a thrust spring; a scraper is mounted between the dry ice slot and the collection hopper; and a switch control cabinet is mounted at one side of the machine body framework. The powder type cleaning machine capable of scraping the dry ice block has the advantages of being novel in structure, simple and convenient for processing, convenient to use, low in cost, safe and environmental protection, etc. Therefore, the utility model belongs to a novel powder type cleaning machine capable of scraping the dry ice block integrating economical efficiency and practicality.

Abstract: Problem statement: This study presents the effect of dry ice application in the fish hold of fishing boat on the fish quality and fisherman income. Dry ice is made with compressed CO2 gas to produce hot, high-pressure gas. Hot gas then cooled to condense into liquid CO2, which is still high pressure. Dry ice can be used to cool a room and can reach temperatures under 0°C. Approach: Objectives of this study are to know the effect of the use of cooling applications by using dry ice as a cooling fish on the fish quality. Results: The experimental investigation has been done in dry ice variations weigh, variations cooling load (fish) and variations fan speed. Conclusion: The results of these experiments have been shown in this study that the dry ice has been reducing the weight of refrigerant weigh to cooling of fish in the fishing boat.

Abstract: PURPOSE: A road-line removal system is provided to quickly remove road lines by successively cutting a road surface, heating the road surface, and spraying dry ice. CONSTITUTION: A road-line removal system comprises a road-line cutting part(20), a heating part(30), a dry ice spray part(40), a dry ice supply part(50), a compressed air supply part(60), an input part, a control part, and a removal system body(10). The road-line cutting part forms scratch on a road line. The heating part heats the scratched road line. The dry ice spray part sprays dry ice on the road line heated by the heating part. The dry ice supply part supplies the dry ice being sprayed by the dry ice spray part. The compressed air supply part supplies compressed air to the dry ice supply part in order to press-feed the dry ice to the dry ice spray part. The input part is inputted with driving signals for the heating part, the dry ice supply part, and the compressed air supply part. The control part controls the operations of the heating part, the dry ice supply part, and the compressed air supply part according to the driving signals. The removal system body is mounted with the above parts and equipped with wheels(111).

Abstract: PROBLEM TO BE SOLVED: To provide an end mill cutting work method for stainless steel using mixed gas of dry ice gas and mist, without rusting a machine tool (a milling machine), by providing a proper work surface, without causing abnormal abrasion of a tool, without applying a load to environmental problems. SOLUTION: In cutting work by an end mill cutting work device as shown in Fig.1, a very small quantity of oil agent of using misty eco-friendly vegetable oil as a base is sprayed on a rotating end mill cutting tool and a cutting part of the stainless steel from a mist injection nozzle, and end mill cutting work of the stainless steel is performed by using the mixed gas of dry ice gas and mist for removing chips while being injected into the end mill cutting tool and the cutting part of the stainless steel of rotating the misty dry ice gas from another one dry ice gas injection nozzle. COPYRIGHT: (C)2011,JPO&INPIT

Abstract: PROBLEM TO BE SOLVED: To efficiently utilize cooling of a liquefied gas base, to reduce carbon-dioxide emissions of an industry plant, and to enrich a plant factory with carbon dioxide and cool the plant factory.SOLUTION: A carbon dioxide recovery utilization system includes: a carbon dioxide recovery apparatus 21 which separates and recovers a carbon dioxide exhausted from a carbon dioxide production source; a dry ice production container 22 that exchanges heat between the carbon dioxide recovered by the carbon dioxide recovery apparatus 21 and a liquefied gas to make a dry ice; and the plant factory 3 that produces plants. The dry ice is used as a supply source for enriching the plant with carbon dioxide and also as a cold source for cooling the plant factory 3.

Abstract: PURPOSE: A reproducing method of a denitrification catalyst using dry ice is provided to remove the generation of wastewater by using the dry ice, and to economically reproduce the denitrification catalyst without using high price chemical solutions. CONSTITUTION: A reproducing method of a denitrification catalyst using dry ice comprises the following steps: detecting the poisoned situation of the catalyst by periodically measuring the amount of ammonia slips, and spraying dry ice pellets(31) to the surface of the catalyst in parallel; crushing the dry ice pellets using a mesh net at a catalyst inlet; generating cracks by rapidly cooling a poisoned material bed on the surface(16) of the catalyst using the crushed dry ice particles; permeating the dry ice particles into the cracks of the poisoned material bed, and pores of the catalyst; and separating poisoning substances(14) from the catalyst.

Abstract: The utility model provides a pen type dry ice cleaning machine, and relates to a portable dry ice cleaning machine. The pen type dry ice cleaning machine comprises a compressed air compressing vessel tank, a liquid carbon dioxide pressure vessel tank, a gas supply pipe connecting piece, an ice supply pipe connecting pipe, a vacuum seat, a machine body and a pen type nozzle, and is characterized in that the vacuum seat is mounted in the machine body; the front end of the vacuum seat is connected with the pen type nozzle through a pipeline; and the gas supply pipe connecting piece and the ice supply pipe connecting pipe at the back part of the vacuum seat are respectively connected with the compressed air compressing vessel tank and the liquid carbon dioxide pressure vessel tank through pipelines. The pen type dry ice cleaning machine has the advantages of novel structure, small volume, practicality, safety, environment friendliness, and the like, is simple and convenient to process, is convenient to use, move, lift and transport, and cannot damage cleaned surfaces. Therefore, the pen type dry ice cleaning machine is a novel economical and practical pen type dry ice cleaning machine.

Abstract: PURPOSE: A dry ice spraying apparatus is provided to prevent the backward flow of highly compressed air into a hopper when a rotor rotates. CONSTITUTION: A hopper(10) includes dry ice. A rotor(20) is installed at the lower opening side of the hopper to be rotatable. A supplying groove is formed at the rotor. The dry ice dropping from the hopper are supplied into the supplying groove. A motor(30) transmits torque to the rotor. A spraying gun(40) sprays the dry ice. An air hose(50) transmits the dry ice by high compressed air.

Abstract: PROBLEM TO BE SOLVED: To provide a device for spraying dry ice particles which enables to spray dry ice particles that are not harder than pellet-shaped dry ice but harder than snow dry ice.SOLUTION: The device for spraying dry ice particles comprises: a liquefied carbon dioxide gas source; a gas-liquid carbon dioxide gas supply path 7; a decompression part 9 in which liquefied carbon dioxide gas is decompressed; a dry ice particle generation part 10 in which dry ice particles are generated from liquefied carbon dioxide gas decompressed in the decompression part; and a dry ice particle introduction path 11 for introducing dry ice particles generated in the dry ice particle generation part into a spray nozzle 2, wherein the dry ice particle generation part has a dry ice particle generation element 15 having at least one through-hole interposed without a gap in the supply path of the gas-liquid carbon dioxide gas decompressed to the triple point pressure or more and less than the critical point pressure from the decompression part, and the shape of the through-hole is regulated so that the pressure before the dry ice particle formation element becomes the triple point pressure or more and the pressure behind the element becomes the triple point pressure or less.

Abstract: In ice-ship ice or ice-structure collisions at sea with icebergs, the majority of contact occurs at the water line boundary where the ice surface is in wet condition. Controlled ice crushing experiments have been performed typically with dry-surface ice, such as Hobson’s Choice tests. Ice crushing experiments with wetted ice have been performed, for example in the Polar Sea trials, but these experiments lacked the controlled environment of laboratory crushing. There has also been a lack of comparative study between ice in dry condition, wetted and fully submerged condition. In this study, the effect of a wetted ice surface is studied and compared to the effect of a dry ice surface. These are then compared to the crushing characteristics of fully submerged ice. These tests determine if any significant difference exist in crushing characteristics between ice with a wetted surface and fully submerged condition and compares both with dry-surface ice condition. Also, effects of temperature and crushing speed were considered. The test results indicated that the wetted and fully submerged condition resulted in a higher load level compared to a dry condition. Moreover, temperature and crushing speed had different effects on the dry and wetted conditions. The tests indicated that consideration must be made to the effect of water in ice crushing tests for a clear understanding of ice behavior and for estimation of ice loads in operational environments.

Abstract: A dry ice weight-reducing pellet is produced by dry ice at low temperature and is stored in a liquid nitrogen tank. The pellet is composed of a casing, a saccule, a bladder and dry ice. The mechanism of action is that: expanding the saccule in the stomach through gasification of dry ice, the expanded saccule floating above food in the stomach to occupy a part of space in the stomach, thus reducing food-intake of people and achieving the purpose of weight reducing. When in use, the pellet is taken out from the liquid nitrogen tank, and is rapidly orally taken with cool water when the temperature of the pellet is over zero DEG C.

Abstract: Besides being a greenhouse gas and a major component of the carbon cycle in nature, carbon dioxide (CO2, CAS 124-38-9) is a substance of major industrial importance. It has a stable linear molecule in which each atom of oxygen is linked with two strong covalent bonds to the atom of carbon. The number of industrial processes using carbon dioxide is very large; it is used for welding; plastics; synthetic fuel processing; oil, gas, and coal-bed methane recovery; refrigerant; heat transfer fluid (e.g., in refrigeration applications and for gas-cooled nuclear reactors); cryogenic cooling (e.g., dry ice); working fluid in power and heat pump cycles, beverage and food processing and preservation; pharmaceutical and processing industry; pneumatic systems; fighting; fire; powder processing; spray painting and coating; polymerization; separation technologies; crystallization processes; dyeing and dry cleaning of textiles; chemical extractions; various chemical reactions; and so on.

Abstract: PURPOSE: An accelerated cooling apparatus for heat-processing control rolling is provided to increase cooling performance and improve mechanical property. CONSTITUTION: An accelerated cooling apparatus for heat-processing control rolling comprises a cooling water injector(10), and a dry ice injector(20). The cooling water injector sprays cooling water on the upper and lower surface of hot-rolled steel material. The dry ice injector injects sprays dry ice particles on the upper and lower surfaces of the hot-rolled steel material.

Abstract: PROBLEM TO BE SOLVED: To provide a local cooling method capable of surely making a fatigue crack opening with a size enough to allow a fatigue crack proceeding speed reducing particle containing paste to enter into the opening. SOLUTION: The local cooling method includes a step of making the fatigue crack opening for allowing the fatigue crack proceeding speed reducing particle containing paste to enter before putting the fatigue crack proceeding speed reducing particle containing paste in a fatigue crack of a metallic member to prevent the crack from proceeding. A predetermined region containing the fatigue crack 2 is surrounded by a cooling region limiting enclosure 3 on a member surface of the metallic member 1. Liquefied carbon dioxide gas fed from a liquefied carbon dioxide gas cylinder 4 is led through a low temperature hose 5 into the cooling region limiting enclosure 3 and jetted as a liquid to make flocculate dry ice in the cooling region limiting enclosure 3. The predetermined region is cooled by the flocculate dry ice. COPYRIGHT: (C)2011,JPO&INPIT

Abstract: The method for the production of dry ice, comprises guiding fluid carbon dioxide to be required from a tank (1) into a pipe (2), where the outlet (4) of the pipe is connected to a connection body (8) pressed by a suitable pressing device (9) and linearly movable in a determined time in back- and forth manner in the form of a cone, ball, plate or rotatable disc with passage opening during the transformation of the liquid carbon dioxide into dry ice through cooling device installed on the pipe section in pressure-resistant manner. The transformation stretch is limited to 150-500 mm. The method for the production of dry ice, comprises guiding fluid carbon dioxide to be required from a tank (1) into a pipe (2), where the outlet (4) of the pipe is connected to a connection body (8) pressed by a suitable pressing device (9) and linearly movable in a determined time in back- and forth manner in the form of a cone, ball, plate or rotatable disc with passage opening during the transformation of the liquid carbon dioxide into dry ice through cooling device installed on the pipe section in pressure-resistant manner. The transformation stretch is limited to 150-500 mm. The connection body is rotatable after formation of the dry ice by the pressing device for a short time and/or rotatable corresponding to a connection plate with passage opening during the installation. The dry ice is pressed through the pressure of the fluid carbon dioxide in upstream pipe from the pipe outlet. The connection disc is rotated with the passage opening, where the tact time determines the discharge speed of the dry ice. The fluid carbon dioxide from the tank is regulated by a suitable pump or other pressure increasing plant in pressure so that the hardness of the emerging dry ice is regulated over the pressure. The fluid carbon dioxide is cooled in or behind the tank with an additional cooling device so that a suitable dimensional cooling is carried out through the cooling device at the section before the pipe outlet. The dry ice rod is cut to length from the pipe section through the pipe end. The pressure increase is adapted through pressure increase station intermittent of the movement of the connection body. The adaptation is determined by the mode of operation of the pressure increase station and is coupled at the movement of the connection body or through reaching a determined pressure or a signal giving the output, at which a valve is fed through the pressure increase plant open to a conductor wiring arranged downstream of the pressure increase plant. An independent claim is included for a device for the production of dry ice.

Abstract: PROBLEM TO BE SOLVED: To provide a carbon dioxide gas recovery apparatus in a dry ice manufacturing process which can follow acute changes of the amount of recovered carbon dioxide gas and has high recovery efficiency.SOLUTION: The carbon dioxide gas recovery apparatus in a dry ice manufacturing process is used for reusing carbon dioxide gas recovered from a dry ice manufacturing machine 5 by liquefying the carbon dioxide gas through a blower 9, a carbon dioxide gas compressor 11, a cooler 12 and a liquefier 15 in order. In the carbon dioxide gas recovery apparatus, buffer tanks 22, 23 are disposed, on an upstream side of the suction side of the carbon dioxide gas compressor 11, which temporarily store recovered carbon dioxide gas and can supply the necessary amount of recovered carbon dioxide gas to the carbon dioxide gas compressor 11 according to the compression treatment capacity of the carbon dioxide gas compressor 11.

Abstract: The invention relates to soft ice used for refrigeration and a manufacturing process thereof The existing refrigerating materials and devices, due to the defects which are difficult to make up, cannot be used by people conveniently, artificial ice is easy to drip water, dry ice releases gases, a refrigeration plant generates noise and the like, and the existing refrigerating materials are one-time used up so that the cost is high The soft ice is prepared from chloride or sulfate, glycerol and water-soluble polymer by stirring or vibrating, the manufacturing process is simple and has a low cost, and the produced soft ice does not leak and drip water, has high plasticity, is nontoxic and tasteless, can be used repeatedly, and can by used for demands of various cold insulation and cooling

Abstract: PURPOSE: The materials of high hardness and the dry ice are together sprayed The foreign material is effectively removed The surface dealing process at the same time operates CONSTITUTION: A hybrid cleaning system comprises a cleaning unit(20), a dry ice feeder(30), a compressed air supply part(40), a high-hardness material supplying unit(50), and a foreign material removing device(60) The cleaning unit comprises the cover and injection body The cover protects the cleaning station the upper part of a objects(10) As to the injection body, the dry ice and dead stem discharges material The dry ice feeder supplies the dry ice through a connection hose(31) connected to the injection body The compressed air supply part offers the compressed air for forcibly delivering dry ice The compressed air supply part is connected to the dry ice feeder As to the high-hardness material supplying unit, the dead stem supplies material through the dead stem connected to the injection body is a material supply tube(51) The foreign material removing device is connected to cover It inhales the foreign material separating from the objects, and the dead stem used to the washing of the foreign material is material and the foreign material removing device eliminates