47 results about "Dry-ice blasting" patented technology

The invention relates to a dry ice blasting method and a dry ice blasting device, and belongs to the field of engineering blasting. The dry ice blasting device comprises a spray head, a cylinder body, a tail cover and a one-way valve, wherein the spray head is provided with an exhaust hole; the tail cover is provided with a water inlet hole; a sealing gasket is arranged between the cylinder body and the tail cover; a blasting sheet is arranged between the cylinder body and the spray head; and the tail cover is communicated with the one-way valve through the water inlet hole. The dry ice blasting method comprises the following steps: drilling in a coal bed; assembling the dry ice blasting device, and filling the dry ice blasting device with dry ice and a heating bag; connecting the dry ice blasting device with a water pipe, and placing into a blast hole; and communicating with a water source, and injecting water into the dry ice blasting device, wherein the heating bag inside the cylinder body fast releases heat when encountering water so as to urge the dry ice to be fast sublimated into carbon dioxide gas, when gas pressure exceeds the design pressure of the blasting sheet, the instant blasting of the blasting sheet is caused, and the carbon dioxide gas is fast discharged through the exhaust hole formed in the spray head to form impaction and expansion extrusion on the wall of the blast hole, so that the blasting is realized. The dry ice blasting method and the dry ice blasting device which are disclosed by the invention have the advantages of achieving the bursting at normal temperature, generating no flame or toxic gas and being suitable for a coal mine with gas and coal dust explosion risks.

A surface of a target item is treated by directing a flow of solid carbon dioxide entrained in ozone towards it.

The invention relates to heating dust suction and dry ice cleaning surface depainting treatment equipment and a method, which belong to the technical field of surface treatment and are suitable for being used for removing paint films prepared from epoxy resin, polyurethane and acrylic resin materials, in particular to the depainting of metal paint films and composite materials on the surfaces of aircrafts, ships and armored vehicles. The equipment comprises a pulse dot light source heating device, a dry ice spraying device and a dust suction device, and when the equipment is used, a pulse dot light source carries out regional irradiation on the surface of an object to be depainted. Simultaneously, the irradiation region is depainted and cooled through low-temperature dry ice in high-speed air flows by the dry ice spraying device, and peeled paint fragments are directly recovered by the dust suction device without leaving residues in sites. The pulse dot light source heating device, the dry ice spraying device and the dust suction device are combined for depainting. Compared with the traditional physical depainting method, the method has the advantages that the cost is reduced, simultaneously, the efficiency is higher, in addition, no damage is caused on substrates, the environment is not polluted, and secondary contaminants are not generated.

A method for treating a thermally loaded component having a metallic substrate and at least partially coated on an outer side with a protective coating, is provided. The method includes the step of predamaging the protective coating before removing the protective coating from the substrate using dry ice blasting. The predamaging is performed so as to lead to an increase of efficiency of the removal process.

The cleaning with solid carbon dioxide for deposition equipment utilizes the temperature tolerance dramatic change of two materials resulted from the residue heat and solid carbon dioxide after heating the deposition under 100-200DEG C temperature, spraying solid carbon dioxide on the equipment surface, crushing the magnesia film left with solid carbon dioxide staying in the gaps between films left, condensing the contamination, and peeling off the residue film from the equipment with extreme inflation of the solid carbon dioxide. It features in the high voltage withstanding ability of 30,000-40,000 watts, without conductivity, with reduced washing cost of 3-5 times.

A dry ice blast cleaning system is disclosed. The system includes a dry ice feed apparatus, a mixing head, a supply of pressurized gas and a dispensing device. The apparatus has a hopper configured to store a supply of dry ice pieces with an anti-bridging device. A heat by-pass system is provided to heat the mixing head to prevent icing in the mixing head.

The invention provides a control method for dry ice cleaning of a chip packaging mold. The control method comprises the following steps that S1, according to the pollution degree of the chip packagingmold to be cleaned, cleaning parameters of cleaning equipment are determined, wherein the cleaning equipment comprises a dry ice cleaning machine, a spray gun used for jetting dry ice, and an air compressor used for providing compressed air for the dry ice cleaning machine, the air compressor is connected to an air inlet pipe of the dry ice cleaning machine, the spray gun is connected to an air outlet pipe of the dry ice cleaning machine, and the dry ice cleaning machine provides solid dry ice particles for the spray gun; S2, the spraying direction and the spraying position of the spray gun are adjusted; S3, the chip packaging mold is heated; and S4, the dry ice cleaning machine is started, and cleaning is carried out according to the set cleaning parameters. According to the control method, the cleaning efficiency of the chip packaging mold is improved, and the relatively high economic efficiency and market value are achieved.

A cleaning system having at least one C0₂ blasting nozzle connected to a robotic arm to automatically and selectively clean an object transported on an assembly line.

The purpose of the present disclosure is to solve the problems of a difficult operation or occurrence of corrosion damage to equipment caused by the attachment of ammonium sulfate salt, which is generated when unreacted ammonia (NH₃ slip) and sulfur trioxide (SO₃) in exhaust gas are bonded with each other when a selective catalytic reduction (SCR) is used to eliminate nitrogen oxides that are contained in the exhaust gas generated during the combustion of a boiler or the like, to a heat exchanger of an air preheater (APH) or the like installed at the rear of an SCR device and blocks a passage of the exhaust gas such that the pressure inside the boiler is increased. To this end, a dry ice cleaning device is installed at the front of an exhaust gas inlet in an air preheater such that the blocking of a heat exchanger caused by ammonium sulfate salt or the like is removed by spraying dry ice pellets, and at the same time, high-temperature steam spraying device is installed at a cold end of the air preheater so as to spray the steam in the same direction as that of air supplied to a boiler, thereby removing contaminants more effectively. Furthermore, in order to effectively prevent blocking which occurs in a cold end of the air preheater, dry ice is sprayed to the front of an exhaust gas inlet of the air preheater and also, to the front of a supply air inlet of the air preheater which is an opposite direction thereof, such that a cleaning effect is increased.

The invention relates to a method and a device for purifying and recycling cleaning waste gas of a hot cell of a fusion reactor by cryogenic rectification. The method comprises six technological processes including a decontaminating cleaning technology, a filtration and purification technology of solid and liquid-state impurities, a carbon dioxide cryogenic rectification separation technology, a low-temperature power gas preparation technology, a volatile granule regeneration technology and a long-distance pneumatic transmission technology. Radioactive particles and residual radioactive gases are collected in a sorting way together with or separated from a cleaning medium by utilizing the original cleaning waste gas. The effect that radioactive wastes in the hot cell are minimized can be realized. The radioactive particles and gaseous nuclear fuel are effectively collected while the cleaning waste gas is enabled not to pollute the environment as radioactive effluent, and an originally used cleaning medium is enabled to be recycled; on the basis, a carbon dioxide dry ice blasting cleaning scheme becomes a first selected option for cleaning a polluted radioactive surface in the hot cell; furthermore, the process scheme is simple in loop structure and easy to implement, thus being suitable for the remote control operation hot cell environment.

The invention discloses a method for regenerating a TiN process Ti material part of film fabrication of semiconductor 8-inch wafer manufacturing. The method comprises the following steps (1) under normal pressure, after pure water or ultra-pure water is heated, hot water is fed into a high-pressure water pump and us sprayed on all parts of the surface of the Ti material part, and the water pressure is not less than 85 bar; (2) the Ti material part is dried by using hot air; (3) under normal pressure, as natural cooling is carried out, a dry ice jetting machine is used, dry ice particles are sprayed to all parts of the Ti material parts at a high speed, and the jetting speed is 870-1000 m/s; and (4) after dry-ice jetting is finished, the temperature naturally returns to the room temperature, and then washing is carried out. According to the method, the steps are concise, but the processing effect is magical, an excellent impurity falling and cleaning effect can be obtained in a relatively short time, moreover, the water flushing pressure and the dry ice quenching are both in the titanium material bearing range, and therefore, the regeneration of the Ti material photoelectric part becomes simple and feasible.

The invention discloses an unmanned aerial vehicle dry ice cleaning system for a power grid insulator. The system comprises an unmanned aerial vehicle body, wherein a dry ice supply device and one or more dry ice spraying nozzles connected with the dry ice supply device are installed on the unmanned aerial vehicle body, and the dry ice spraying nozzles are installed on the unmanned aerial vehicle body through an adjusting device in a spraying angle mode. The system has the advantages of high safety coefficient, high cleaning efficiency, simplicity in operation, convenience in use, good cleaning effect and the like.

The invention provides a novel anodic oxidation pretreatment method, and relates to treatment methods for biomedical materials, in particular to surface pretreatment before anodic oxidation for titanium and titanium alloy preparation. The novel pretreatment method comprises the step that carbon dioxide ice particle jet treatment is conducted on the surface of a matrix, specifically, (1-1) carbon dioxide ice particles are treated by changing the size of the carbon dioxide ice particles or by changing both the size and shape of the carbon dioxide ice particles, and (1-2) the carbon dioxide ice particles are sprayed onto the surface of the matrix, so that the surface of the matrix is purified and coarsened. According to the novel pretreatment method, an existing carbon dioxide jet cleaning process is improved, an existing sand-blasting/centrifugal grinding process is replaced, and even the activation procedure can be omitted; by using the carbon dioxide ice particle jet cleaning techniquefor treatment, it is found that the quantity of broken abrasive particles left on the surface of the matrix is greatly reduced, and interface pollution is basically eliminated. Obvious broken abrasive particle residues on an interface are avoided while the surface of the matrix is purified and coarsened, and thus, secondary interface pollution is greatly reduced; and the quality and bonding strength of the film interface are improved, and the service life of the film interface is prolonged.

The invention discloses a dry ice cleaning device which comprises a carbon dioxide storage tank car. The carbon dioxide storage tank car is connected with a dry ice granulator through a liquid inlet pipe; the dry ice granulator is connected with multiple dry ice preserving bins; dry ice in the multiple dry ice preserving bins is conveyed to a dry ice jet cleaner through a conveyor belt; dry ice quantity detectors are arranged on the multiple dry ice preserving bins; the dry ice jet cleaner is connected with a drier and comprises a feed inlet; the feed inlet is connected with a dry ice storingcavity; a dry ice smasher is arranged under the dry ice storing cavity and is connected with an electromotor and an air compressor; an ejector is connected onto the dry ice jet cleaner through a pipeline, and comprises a valve and a rotating nozzle; a data detector is arranged on the dry ice jet cleaner; and the data detector and the dry ice quantity detector are connected with a computer throughnetwork. The dry ice cleaning device provided by the invention is simple in structure; the adopted drier can be used for removing moisture in a high-pressure gas; and the adopted nozzles can rotate at360 degrees without dead angles.

The invention discloses dry ice cleaning equipment for a semiconductor element. The dry ice cleaning equipment comprises an equipment frame body, a dry ice generating mechanism, a dry ice spraying mechanism, a dry ice purifying mechanism and a cleaning chamber, wherein the dry ice generating mechanism, the dry ice spraying mechanism, the dry ice purifying mechanism and the cleaning chamber are mounted on the equipment frame body; the dry ice generating mechanism comprises a liquid carbon dioxide storage tank and a dry ice generator; the dry ice spraying mechanism comprises a dry ice nozzle boss for mounting a dry ice spray nozzle, and a manipulator for driving the dry ice nozzle boss to move; the dry ice purifying mechanism comprises an air intake fan and an air exhaust fan, the air intake fan communicates with the cleaning chamber, and the air exhaust fan communicates with the cleaning chamber; and the cleaning chamber is divided into an upper-layer cleaning part and a lower-layer material collecting part by a screen plate, a containing plate where a product can be placed is fixed on the screen plate, the cleaning chamber is provided with an air outlet, and the air outlet communicates with the air exhaust fan. According to the dry ice cleaning equipment, impurities such as burrs and particles on the surface of the semiconductor element are crushed by the dry ice particles, so that the surface of the semiconductor meets the requirement of high cleanliness.

The invention discloses a dry ice jet cleaning method used for a generator unit, a dry ice solution formula and a special device for the dry ice jet cleaning method. The cleaning method comprises thesteps that dry ice particles with the extremely low temperature of -78--48 DEG C are adopted to be accelerated with low-pressure air as a carrier and power, and jetted out of a jetting gun at the speed of 200-273 m/s to hit against dirt on a to-be-cleaned surface in the generator unit. The special device comprises a low-pressure air pipe, an air pressure adjusting valve, an electric flow regulating valve, a variable-speed motor, a rotary ice wheel, a dry ice tank, a vibration motor, a connecting hose, a spray nozzle, a PLC system and a cleaning machine case. The dry ice jet cleaning method hasthe advantages of being simple in operation, high in cleaning efficiency, environmentally friendly, high in installation adaptability and suitable for cleaning of all large, middle and small generators, saving energy and having no special requirements for a place.

The invention relates to a tunnel wall cleaning device which comprises a dry ice spraying assembly (2), the dry ice spraying assembly (2) is fixedly connected to a cover body (1), and the back of the cover body is connected with a mechanical arm (3). The cover body (1) can prevent dust from flying in a cleaning area during cleaning; a row brush plate (12) is arranged on the cover body (1), when an electrical equipment installation area on the tunnel wall is cleaned, bristles on the row brush plate (12) can achieve a sweeping function and can avoid obstacles; through the design, the cover body (1) can be close to the tunnel wall face as much as possible through the mechanical arm (3) in the cleaning process, and dust raising is prevented. The problem that in the prior art, a high-pressure air blowing cleaning mode is large in dust raising amount is solved.

The invention discloses a cleaning technology for a surface demoulding agent of a carbon fiber composite product. The cleaning technology for the surface demoulding agent of the carbon fiber compositeproduct comprises the following steps of spraying dry ice onto the surface of the composite product by a dry ice spraying device to remove the demoulding agent from the surface of the composite product. According to the cleaning technology for the surface demoulding agent of the carbon fiber composite product, the demoulding agent can be effectively removed, the removal efficiency is improved, and the product surface quality after removing the demoulding agent can be effectively guaranteed.

The invention discloses a dry ice blasting cultivation device and a working method, and relates to the technical field of agricultural equipment.The dry ice powder storage device communicates with a telescopic pipe, and an opening and closing head is arranged below the telescopic pipe; the outer wall of the telescopic pipe is connected with one end of a connecting rod, the other end of the connecting rod is connected to a hydraulic mechanism, and the hydraulic mechanism works to drive the telescopic pipe to move up and down. A conical-column-shaped resonance body support is arranged in the telescopic pipe, and an air inlet, a powder inlet and a powder outlet are formed in the conical-column-shaped resonance body support; gas enters a Laval pipe arranged in the cone-column-shaped resonant body support through the gas inlet, enters the cone-column-shaped resonant cavity through an outlet in the outlet end of the Laval pipe and then flows out. Dry ice powder enters from the powder inlet, is converged with gas at the outlet of the conical-cylindrical resonant cavity, and is sprayed out from the powder outlet; the dry ice powder is sprayed out through the powder outlet, and the elastic piece works to open the opening and closing head under the action of impact force. The effect of shallow ploughing and soil loosening can be achieved.

The invention relates to a stage smoke onsite manufacturing platform used for dry ice spraying. The platform comprises a dry ice spraying device, a movement driving device, a hemisphere type camera, and an overall analysis device. The dry ice spraying device is arranged on one side of a stage main place and used for spraying dry ice towards the stage main place so as to provide stage smoke effectsand create atmospheres for performance on the stage main place. The movement driving device is arranged under the dry ice spraying device, and used for carrying out the dry ice spraying device to drive the dry ice spraying device to move. The hemisphere type camera is used for carrying out immediate image shooting on the stage main place so as to acquire and output a corresponding stage main place image. The overall analysis device is connected with the hemisphere type camera and used for receiving the stage main place image and determining an overall segmentation threshold corresponding to the stage main place image according to distribution conditions of pixel values of each pixel point in the stage main place image. According to the invention, the cost performance of the stage dry icespraying is improved.