168 results about "Solid carbon dioxide" patented technology

The carbon dioxide unloading system comprises a liquid carbon dioxide storage tank, a heater, an unloading pump, a receiving tank, a plurality of pipelines and a control valve, an outlet of the liquid carbon dioxide storage tank is divided into a first pipeline and a second pipeline, the first pipeline is communicated with the heater, and the second pipeline is communicated with the receiving tank. The second pipeline is communicated to a first inlet of the receiving tank through a fifth control valve; the first pipeline is provided with a first control valve before entering the heater; the carbon dioxide outlet end of the heater is divided into a third pipeline and a fourth pipeline after passing through the second control valve; the third pipeline is provided with a third control valve and communicated with a second inlet of the receiving tank, and the fourth pipeline passes through an eighth control valve and then returns to the liquid carbon dioxide storage tank; the unloading system is provided with at least one pipeline leading to the atmosphere. Through the perfect unloading process flow design, the potential safety hazards that water is frozen, carbon dioxide forms dry ice, the pressure in the unloading system is too high and the like are properly solved, and the unloading system can operate safely and stably.

The invention relates to the technical field of dry ice tail gas recovery, and discloses a tail gas recovery device for preparing dry ice, which comprises a tail gas pipe, the left end of the tail gas pipe is communicated with a tail gas outlet of dry ice production equipment, the right end of the tail gas pipe is communicated with an adsorption tower, and a carbon dioxide adsorption part is fixedly mounted in the adsorption tower. Carbon dioxide in tail gas is adsorbed through a carbon dioxide adsorption part in an adsorption tower, then the carbon dioxide is collected through a collecting cover, collected carbon dioxide gas flow enters a communicating pipe along an output pipe and then is guided into a compressor after being pressurized by a booster pump, the carbon dioxide gas is compressed through the compressor, and the compressed carbon dioxide gas flows into the tail gas. Compared with the mode that tail gas is introduced into a compressor, the mode that the tail gas is used as a raw material for preparing dry ice can purify the tail gas and increase the content of carbon dioxide, and then the high-temperature liquid state compressed by the compressor can meet the requirement for manufacturing the dry ice.

The invention provides a dolomite roasting method, a carbonization method, a calcium-magnesium separation method and a comprehensive utilization method. The comprehensive utilization method of dolomite comprises the following steps: performing dolomite roasting on dolomite powder to obtain calcined powder; sequentially carrying out digestion treatment and aging treatment on the calcined white powder to obtain an aging solution; carrying out carbonization treatment on the aging solution to obtain a carbonization reaction solution; carrying out solid-liquid separation on the carbonization reaction liquid to obtain heavy magnesium water and a first solid isolate; carrying out pyrolysis treatment on the heavy magnesium water to obtain pyrolysis reaction liquid; carrying out solid-liquid separation on the pyrolytic reaction liquid to obtain decomposition liquid and a second solid isolate; carrying out magnesium carbonate roasting on the second solid isolate to obtain magnesium oxide; and carrying out reduction treatment on the magnesium oxide to obtain magnesium metal and magnesium aluminate spinel. According to the invention, comprehensive utilization of dolomite resources is realized, no waste residue or waste gas is discharged, a main product is magnesium metal, and byproducts are light calcium carbonate, magnesium aluminate spinel and solid carbon dioxide.

Compositions and methods are provided for a system in which liquid carbon dioxide, or a mixture of liquid and gaseous carbon dioxide, is converted to solid carbon dioxide by exiting an orifice at a sufficient pressure drop, e.g., for delivery of carbon dioxide to a concrete mixture in a mixer.

The invention provides a gas purification and separation method and device, and belongs to the technical field of gas purification. The method comprises the following steps: mixing process gas and methanol, and sequentially carrying out condensation treatment and gas-liquid separation treatment to obtain gas-liquid separation process gas and acidic gas condensate; carrying out methanol washing on the gas-liquid separation process gas to realize desulfurization and decarbonization so as to obtain purified gas and rich methanol (including first sulfur-containing methanol and carbon-rich methanol); carrying out first flash separation treatment on the acidic gas condensate to respectively obtain acidic gas, second sulfur-containing methanol and solid carbon dioxide; washing the solid carbon dioxide with methanol, dissolving the solid carbon dioxide in methanol, and carrying out second flash separation treatment on the obtained methanol rich in carbon dioxide to respectively obtain gas carbon dioxide and cold methanol containing carbon dioxide; the carbon dioxide-containing cold methanol can be reused for dissolving the washed solid carbon dioxide after being heated; heat exchange is carried out between the second flash separation treatment and the condensation treatment. The method has a good process gas purification and separation effect, and has the advantages of energy conservation and consumption reduction.

Compositions and methods are provided for a system in which liquid carbon dioxide, or a mixture of liquid and gaseous carbon dioxide, is converted to solid carbon dioxide by exiting an orifice at a sufficient pressure drop, e.g., for delivery of carbon dioxide to a concrete mixture in a mixer.

The invention belongs to the technical field of dry ice air jet, particularly relates to a dry ice air jet generating device and method, and aims to form high-speed airflow by using compressed air and dry ice particles so as to be applied to the fields of industrial cleaning, surface treatment and the like. The main device comprises an air compressor, an air storage bottle, a high-pressure hose, a stop valve, a pressure release valve, a pressure gauge, a dry ice particle preparation system, an ejector and a self-oscillation nozzle. The method comprises the steps that the air compressor compresses air to high pressure and stores the air in the air storage bottle; the liquid carbon dioxide is pressurized and conveyed into the ice forming barrel through the plunger pump, and the liquid carbon dioxide is converted into dry ice through temperature and pressure changes; and the dry ice is cut into dry ice particles by the ultrasonic knife net. Then, the dry ice particles and compressed air are mixed in the ejector and accelerated to a high speed; and finally, spraying the mixture through a self-oscillation nozzle to form a high-speed dry ice air jet flow. By means of the method, the dry ice air jet can be efficiently and stably generated, and the method is suitable for various industrial applications such as cleaning, surface treatment and sand blasting. The device is simple in structure and convenient to operate, and has high application value.

The invention discloses a locomotive accessory water-free cleaning system which comprises a carbon dioxide liquid storage tank, a dry ice making device, a cleaning room, a turnover device, a dry ice spraying device, a mobile robot, an oil mist purifying device and a control center. The cleaning device is used for cleaning locomotive accessories; the mobile robot is used for clamping and moving the dry ice spraying device so that the dry ice spraying device can conduct multi-angle cleaning on the locomotive accessories. A dry ice cleaning technology is adopted, granular dry ice and compressed air are mixed to generate high-speed airflow for cleaning, the dry ice is converted into a gas state from a solid state, micro-explosive impact force is directly generated, and dirt on the surfaces of locomotive accessories is crushed and removed. In the cleaning process, dry ice is instantly sublimated into gaseous carbon dioxide to be volatilized into the air, no residual matter exists, and secondary pollution cannot be generated.

This patent introduces an innovative system for solar energy-assisted cold spray additive manufacturing, coating, and repair purposes. The system is designed for both extraterrestrial and terrestrial applications, leveraging the efficient utilization of the solar energy and in-situ resources for manufacturing processes. The comprehensive system integrates multiple technologies, including a cold spraying unit, a solar energy-based air / gas compressing unit, a unit for solar light collection, guiding, and amplification, a solar furnace unit, a solar cell for electrical energy unit, commercial powder / local soil collection and sieving unit, robotic units for guiding, communication, materials transport purposes, and a dry ice and carbon dioxide gas reservoir with solar energy-based heating system. The invention is particularly suited for use on Mars, utilizing the planet's atmospheric carbon dioxide and solid carbon dioxide (i.e., dry ice, which can be sublimed to gaseous carbon dioxide) to be used as the carrier gas for the spraying process. This approach minimizes the need for transporting materials from the Earth, addressing a significant challenge in space exploration and colonization. The system includes solar energy-based scanners to preheat the substrate surfaces and deposited layers, reducing thermal stresses and enhancing the interfacial bonding between the deposited layers and the substrate. This invention offers a sustainable and efficient solution for manufacturing and repairing components and structures in space, supporting the growing interest in extraterrestrial exploration and habitation.

The invention discloses a stratum freezing system and method based on solid and liquid carbon dioxide, the solid carbon dioxide is sublimated to absorb heat by adopting a heat exchange cooling mechanism to form a primary refrigerant, and then the liquid carbon dioxide is conveyed through a carbon dioxide conveying mechanism, so that the liquid carbon dioxide exchanges heat with the primary refrigerant to form a secondary refrigerant; a compressor and other devices are not needed to reduce the temperature of the primary refrigerant, the solid carbon dioxide is directly used for sublimating and absorbing heat to cool the liquid carbon dioxide, so that the freezing period is shortened, the temperature of the primary refrigerant is greatly reduced due to the characteristics of the solid carbon dioxide, and the freezing temperature of the secondary refrigerant can be effectively reduced; the circulating mechanism conveys the secondary refrigerant to the freezing area for heat exchange, after the freezing area is frozen, the heated secondary refrigerant is returned to the carbon dioxide conveying mechanism and the heat exchange cooling mechanism for refrigeration again, liquid carbon dioxide serves as the secondary refrigerant to conduct circulating refrigeration in the freezing pipe, and the freezing period is effectively shortened.

The invention relates to the technical field of preparation of carbon dioxide adsorbents, and discloses a carbon dioxide solid adsorbent and a preparation method and application thereof, the carbon dioxide solid adsorbent comprises 10-15 parts of aminated montmorillonite, 5-8 parts of modified chitosan, 20-25 parts of desulfurized gypsum, 3-5 parts of a composite water-retaining agent, 1-2 parts of a functional buffer agent and 0.5-1 part of an ammonia adsorption accelerant. According to the invention, the aminated montmorillonite is adopted to replace traditional streptomycin, so that the raw material cost is reduced, and the risk of antibiotic residue is thoroughly eliminated; chitosan is modified through graphene quantum dots, the excellent oxidation resistance of the graphene quantum dots is utilized, an antioxidant does not need to be additionally added, the environment burden is reduced while the preparation process is simplified, and the degradation rate of the adsorbent in the natural environment is increased. All the components in the adsorbent have a synergistic effect, the aminated montmorillonite provides abundant adsorption active sites, the modified chitosan enhances the mechanical strength and stability of the adsorbent, the composite water-retaining agent and the buffer agent guarantee the stability of an adsorption environment, and the ammonia adsorption accelerant accelerates CO2 adsorption kinetics.

According to the carbon cycle ammonia production system and method based on chemical-looping water splitting, in the carbon cycle ammonia production system based on chemical-looping water splitting, a chemical-looping carbon cycle nitrogen-hydrogen cogeneration module combines a fuel reactor and a high-temperature solid carbon dioxide electrolytic cell in a chemical-looping process, and hydrogen-nitrogen cogeneration with zero carbon emission is achieved. According to the Harbin process ammonia preparation module, multi-stage compression and intermediate cooling are carried out on raw material gas, the system energy consumption is reduced, and moisture used for a steam reactor is preheated. Then, a multi-stage reactor is adopted in the ammonia production process, heat recovery and raw material recovery are implemented, and a chemical chain product is efficiently converted into ammonia gas. The concentrating solar thermoelectric steam co-production module adopts molten salt as a working medium and is combined with a reheat return Rankine cycle containing a heat regenerator to meet the heat and electricity requirements of the system. The system utilizes a chemical-looping water splitting technology to prepare high-purity ammonia gas under a zero-carbon condition, and has the advantages of high efficiency, low emission, high resource utilization and the like.

The invention discloses a multiphase efficient solid carbon dioxide energy storage system and a control method thereof. Liquid carbon dioxide in the energy storage stage is expanded and converted into solid carbon dioxide to be stored, the solid carbon dioxide in the energy release stage is converted into high-pressure liquid carbon dioxide to drive the gas-state driving generator, and energy storage and release are completed; according to the invention, the disadvantages of low energy storage density and high energy loss in the prior art are solved, and a prospective solution is provided for carbon capture, energy storage and multi-scene application; powerful support is provided for efficient development of the global energy industry; carbon dioxide is liquefied through recovery and compression after energy release and returns to an energy release stage inlet of the liquid storage tank, closed-loop circulation of carbon dioxide among a liquid state, a solid state and a liquid state is achieved, and efficient operation is achieved; solid carbon dioxide serves as an energy storage medium, efficient conversion and circulation of energy are achieved, and the system has the advantages of being simple in structure, low in operation cost and high in energy utilization rate.

The application discloses a direct air carbon dioxide capture and utilization system and method using LNG cold energy, which comprises an LNG gasification cold release device, an air carbon dioxide capture device and a carbon dioxide utilization device; ambient air is cooled and dehumidified by a low-temperature cold energy heat exchanger of the LNG gasification cold release device and then enters the air carbon dioxide capture device; when desorbing carbon dioxide, humid carbon dioxide released by the air carbon dioxide capture device is first cooled and dehydrated by the low-temperature cold energy heat exchanger of the LNG gasification cold release device, and then is cooled and liquefied by the low-temperature cold energy heat exchanger of the LNG gasification cold release device to obtain liquid carbon dioxide product. The application solves the problem that the capture efficiency of the direct air carbon dioxide capture system is easily affected by the humidity of ambient air, and through air cooling and dehumidification, humid carbon dioxide product gas is cooled, dehydrated, liquefied and dry ice is prepared, so that the cycle efficiency of air carbon dioxide capture and the system energy utilization efficiency are effectively improved.

The invention discloses a method for releasing liquid carbon dioxide in the technical field of high-pressure pipeline safety release, which is used for a refrigerating system and comprises the following steps of: reducing the flow rate of carbon dioxide entering a well and releasing the carbon dioxide in the well based on the liquid level of a gas-liquid separation tank and the inlet pressure of a throttling and pressure reducing device; the compression power is reduced along with the reduction of the pressure of the air return port of the combined cooling and heating device; after the device is shut down, the carbon dioxide release rate of the lifting well is reduced, and gas return is stopped; when the pressure of the carbon dioxide outlet of the heat exchanger is reduced to a threshold value, discharging is stopped; when the system pressure is balanced, the carbon dioxide in the well is released. The flow of carbon dioxide entering the well is reduced based on the liquid level of the gas-liquid separation tank and the pressure of the throttling and pressure reducing device, well rising carbon dioxide is released, the compression power of the combined cooling and heating device is coupled with the pressure of an air return port, then releasing is stopped, global releasing is conducted after the system pressure is balanced, and the risks of dry freezing, freezing and valve freezing are eliminated; and the discharge safety and the system stability are improved.

The present application belongs to the technical field of ship emergency cargo sweeping and throwing, and particularly relates to an emergency cargo sweeping and throwing device and process for a liquid carbon dioxide transport ship. The present application comprises a liquid cargo bulkhead thickness monitoring sensor, an in-cabin cargo sweeping pipe, a pressure balance pipe, a detachable throwing pipe and an overboard pipe, a liquid cargo vaporizer, and a pressure and temperature sensor. The pipeline pressure is established in advance through the pressure balance pipe, and the phase change of the liquid carbon dioxide occurs only when it flows through the end of the overboard pipe by using the detachable pressure control valve, so that the mixture of powder dry ice and gas is continuously thrown out of the overboard, effectively preventing pipeline blockage. The present application solves the technical problems of slow emergency cargo discharge speed, risk of carbon dioxide enrichment, and dry ice blocking the pipeline in the prior art, realizes the rapid, safe and continuous discharge of liquid carbon dioxide in an emergency, and significantly improves the emergency response capability and operation safety of the ship.

The invention discloses an airtight insect killing system and method for a tobacco storehouse, and the system comprises a control device, a nitrogen gas source, a carbon dioxide gas source, a gas inlet pipeline, a gas exhaust pipeline, a gas extraction device and a plurality of micro-differential pressure sensors, and the control device is used for controlling the gas extraction device to extract gas from all airtight tents in the ith group at the same time; when the first air pressure data in each airtight tent in the ith group reach a preset air pressure range, controlling the exhaust equipment and the exhaust valve corresponding to the ith group to be closed, and then performing air tightness detection according to the second air pressure data in each airtight tent in the ith group; the control equipment is further used for executing N preset nitrogen charging and oxygen reducing procedures after the air tightness detection is qualified; and after the oxygen content in the airtight tents of the ith group reaches a first preset content range, controlling the carbon dioxide gas source to fill carbon dioxide into the airtight tents of the ith group or put dry ice into the airtight tents of the ith group. According to the invention, the efficiency of air tightness detection, nitrogen charging and oxygen reduction and controlled atmosphere insect killing can be improved.

The invention relates to the technical field of cleaning agents, in particular to a method for cleaning a titanium tetrachloride preheater. According to the method for cleaning the titanium tetrachloride preheater, provided by the invention, the titanium tetrachloride preheater is regularly cleaned by adopting dry ice. Dry ice cleaning is a physical process, a cleaning medium is solid carbon dioxide and does not chemically react with equipment materials (such as Inconel 601 alloy) and residual titanium tetrachloride, the problem that corrosive hydrogen chloride gas is generated by traditional water washing is completely eradicated, and an equipment body is protected. Efficient and lossless cleaning of the titanium tetrachloride preheater can be achieved, and the titanium dioxide quality problem caused by falling of a carbon scale layer of the titanium tetrachloride preheater is thoroughly solved.

The present invention discloses a method for synthesizing urea using dry ice. A self-made atmospheric pressure corona discharge ionization device is used to efficiently ionize water molecules in the air to form water radical cation dimers. The resulting dimers first react with nitrogen in the air to produce hydroxylamine radical cations, which then react with carbon dioxide formed by sublimation of dry ice to further produce urea radical cations. The urea radical cations are then captured using mass spectrometry to produce urea. This method solves the problem of harsh reaction conditions and the need for high temperature and high pressure in the prior art of preparing urea using carbon dioxide. Furthermore, the method is green, mild, and catalyst-free, meeting carbon reduction requirements.

The application discloses a kind of multiphase state CO2 jet flow simulation experiment device and experimental method thereof, it is related to oil and gas field development, carbon dioxide geological storage (CCUS) technical field, experimental device includes: the pressure-bearing unit that can be opened, for storing dry ice, when pressure-bearing unit is closed, pressure-bearing unit is closed state;Pressure relief structure is installed on pressure-bearing unit, with pressure-bearing unit inside communication, and when the pressure of pressure-bearing unit inside reaches preset value, pressure relief structure makes that pressure-bearing unit inside and outside communication;Wellbore simulation unit, including casing, casing is transparent, pressure-bearing unit and pressure relief structure are arranged in casing;Heating assembly, for heating casing;Temperature measuring unit;Pressure measuring unit;High-speed camera device, etc..The present application can solve the problem that CO2 source uses high-pressure gas cylinder direct gas supply mode to simulate leakage process in existing experiment, which cannot simulate CO2 leakage caused by solid phase blockage, pressure accumulation in closed space and other factors in actual field.

This application, applicable to the field of equipment control technology, provides a safe charging method and electronic device based on a three-dimensional model. The method comprises: obtaining current internal cavity state parameters if a preset charging trigger condition is met; importing the powder density and propulsion parameters into a preset three-dimensional simulation model to determine a corresponding powder handling strategy for the pressure reducing piston; and, after executing at least one powder handling operation in the powder handling strategy, adding liquid carbon dioxide to the cavity based on the calibrated charging value. This method improves the operational safety of dry ice production equipment, prevents excessive dry ice particle density from blocking the pressure reducing piston's propulsion and causing component damage, and extends the service life of the dry ice production equipment.

The present invention relates to a solid carbon dioxide cleaning device for a semiconductor package. The solid carbon dioxide cleaning device for a semiconductor package may comprise: a nozzle for cleaning a semiconductor package by spraying solid carbon dioxide from a solid carbon dioxide supply unit; an ionizer installed around the nozzle to remove static electricity from the semiconductor package; and a seating unit providing an upper surface on which the semiconductor package is seated in contact therewith, and preventing static electricity from accumulating in the semiconductor package in contact therewith.

The present application discloses a multi-functional supply station for an electric cold-chain transport vehicle, comprising: a formic acid hydrogen production device. After the hydrogen and carbon dioxide produced by the formic acid hydrogen production device are separated by a gas separation device, the hydrogen enters the anode of a fuel cell, and an electrochemical reaction occurs between the hydrogen and the oxygen at the cathode of the fuel cell inside the fuel cell to generate electric energy; an energy storage battery, electrically connected to the fuel cell, for storing the electric energy generated by the fuel cell; the energy storage battery is connected to a charging pile for charging the vehicle; a dry ice manufacturing device, including a liquefaction device communicated with a carbon dioxide outlet and used for liquefying gaseous carbon dioxide into liquid carbon dioxide, a solidification and compression device for solidifying the liquefied liquid carbon dioxide to form dry ice, and a dry ice storage tank communicated with the outlet of the solidification and compression device. The multi-functional supply station for the electric cold-chain transport vehicle can not only supplement electric energy for the electric cold-chain transport vehicle, but also supplement dry ice, realizing one-stop supplementation.

The invention discloses a liquid nitrogen and liquid carbon dioxide mixing device which comprises a tank body, a liquid carbon dioxide injection assembly, a nitrogen injection assembly, a liquid nitrogen injection pipe and a monitoring assembly, and the output end of the liquid carbon dioxide injection assembly and the output end of the nitrogen injection assembly are both inserted into the top of the tank body; the liquid carbon dioxide injection assembly is used for evenly injecting liquid carbon dioxide liquid drops into the tank body, the liquid nitrogen injection pipe is assembled on the lower side of the outer surface of the tank body in an inserted mode, the monitoring assembly is assembled on the outer surface of the tank body, an adjusting valve is assembled at the lower end of the tank body, and an output pipe is assembled at the lower end of the adjusting valve. The temperature difference between the upper part and the lower part is realized and a certain pressure is kept in the tank body, and liquid carbon dioxide is injected by adopting a dot-matrix thin tube, so that the carbon dioxide in the tank body is injected from the top in a raining manner and is frozen into granular, powdery or snowflake-shaped dry ice at the lower part of the tank body, and the liquid carbon dioxide is prevented from being frozen and blocked at an inlet of the tank body.

This invention discloses a carbon dioxide unloading method, comprising: starting an unloading pump; adjusting the flow rate of the heating medium in the heater to ensure the gas temperature at the heater outlet is above 5°C; opening the control valve of the pipeline leading to the atmosphere to purge the pipeline within the unloading system with carbon dioxide gas to remove water vapor; closing the control valve of the pipeline leading to the atmosphere; opening the second inlet of the receiving tank; adjusting the flow rate of the heating medium in the heater to slowly fill the receiving tank with carbon dioxide gas at -20°C or higher; opening the fifth control valve and the first inlet of the receiving tank to allow the pressure inside the receiving tank to continue to rise; and connecting the return gas pipeline when the pressure difference between the receiving tank and the storage tank is within 0.5 bar. This invention, through a well-designed unloading process, effectively solves the safety hazards of water freezing, carbon dioxide forming dry ice, and excessive pressure within the unloading system, enabling the unloading system to operate safely and stably.

The invention discloses a system and a method for freezing, separating and recycling carbon dioxide mixed gas under normal pressure, and relates to the technical field of recycling of combustion type flue gas carbon dioxide. The separation and recovery system comprises an ultralow-temperature CO2 separation tower and a large-temperature-difference special-temperature-zone heat pump, wherein the ultralow-temperature CO2 separation tower is connected with the large-temperature-difference special-temperature-zone heat pump through an ultralow-temperature cold source conveying pipe; the separation and recovery method comprises the following steps: quickly cooling flue gas or mixed gas containing carbon dioxide to below-78 DEG C by using a large-temperature-difference special-temperature-zone heat pump, immediately changing the carbon dioxide gas into carbon dioxide solid (dry ice), separating the carbon dioxide solid from other gases, separating the carbon dioxide solid out, and discharging other gases to obtain pure carbon dioxide. The system for recycling the carbon dioxide gas is simple, few in applied equipment and thorough and clean in recycling, and obtained carbon dioxide is pure; according to the method, the carbon dioxide gas in the discharged waste gas can be completely separated and recycled, zero carbon emission is achieved, the recycled carbon dioxide can be converted and utilized, and consumption of primary energy is greatly reduced.

Method and equipment for conditioning wet concrete (703), the wet concrete (703) being agitated in a revolving-drum concrete mixer (702), thereby bringing changing portions of the wet concrete (703) to a free surface (706) of the wet concrete (703) inside the mixer (702), the agitated wet concrete (703) being cooled and partially carbonated in that liquid and / or solid carbon dioxide is supplied to the concrete mixer (702) simultaneously with liquid nitrogen so that both the supplied nitrogen and the supplied carbon dioxide contact the free surface (706) of the wet concrete (703).

The invention relates to the field of solid carbon dioxide preparation and forming processing, and discloses a device for efficiently preparing high-density dry ice.The device comprises a base, a device body is arranged at the top of the base, a feeding assembly is arranged in the device body, and a temperature control assembly is arranged in the device body; a blanking assembly is arranged outside the device body, the blanking assembly is combined with the pressing assembly to make the granular dry ice into dry ice blocks, an air injection assembly is arranged at the top of the base and used for cleaning the interior of the pressing assembly, and a radiator is arranged at the top of the device body. And through the arrangement of a heat blocking composite cylinder body structure with a heat exchange runner, thermal isolation of a low-temperature snow making environment in the pressing cavity and a wall surface micro-temperature regulation and control environment is achieved. According to the structural design, input of heat is concentrated on an inner wall contact interface, invalid heat transfer loss is reduced, and the low-temperature stability of the overall structure of the device body is maintained while the gas film generation efficiency is guaranteed.

A simple sampling device for liquid carbon dioxide comprises a storage tank and a buffer tank, the buffer tank is arranged on one side of the storage tank, a liquid inlet of the buffer tank is communicated with the storage tank through a liquid inlet pipeline, a liquid outlet of the buffer tank is communicated with a liquid outlet pipeline, and the other end of the liquid outlet pipeline is communicated with a sampling pipeline. A first valve is arranged on the liquid inlet pipeline, a second valve is arranged on the liquid outlet pipeline, and carbon dioxide in the buffer tank can be in a liquid state by controlling opening and closing of the first valve and the second valve. The buffer tank is additionally arranged on one side of the high-pressure storage tank, and the pressure in the buffer tank is controlled through the first valve and the second valve, so that dry ice can be prevented from being generated during sampling, the blocking risk is reduced, high-purity carbon dioxide gas can be taken out, and subsequent purity detection on the carbon dioxide gas is facilitated.

The invention relates to a porous foamy carbon material and a preparation method thereof. The preparation method comprises the following steps: mixing alloy powder, a liquid carbon source and dry ice, and reacting in a supercritical carbon dioxide medium environment formed under a sealed heating condition to prepare the porous foamy carbon material. According to the preparation method disclosed by the invention, the porous foamy carbon material with a special morphology structure can be prepared, the strength and the structural stability of the carbon material are improved, and the application requirements in multiple fields can be met.