133 results about "Solid carbon dioxide" patented technology

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.

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.

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 discloses a method for preparing a high-density aluminum oxide coating by using a suspension plasma spraying technology, and relates to the technical field of suspension plasma spraying, and the method comprises the following steps: 1, carrying out sand blasting treatment on an upper electrode plate; sequentially carrying out high-pressure washing, compressed air blow-drying and drying operations; 2, the upper electrode plate is placed in a sulfuric acid solution to be subjected to hard anodic oxidation treatment; 3, a dry ice sand blasting process is adopted for pretreating the hole periphery area of the surface of the steel plate; step 4, injecting the aluminum oxide suspension into high-energy plasma flame flow through plasma spraying equipment; the aluminum oxide particles in the suspension are rapidly molten in the flame flow, then collide with the surface of the upper electrode plate at a high speed along with the plasma flow, and are rapidly cooled and solidified to form a layer of high-compactness aluminum oxide coating on the surface of the upper electrode plate. By optimizing the coating preparation process and parameters, the compactness and corrosion resistance of the coating are improved, the service life of equipment parts is prolonged, and the cost of a production enterprise is reduced.

The invention discloses a solid carbon dioxide driven engine, which realizes clean, efficient and low-noise power output by utilizing the phase change characteristic of solid carbon dioxide and a supercritical carbon dioxide circulation technology. Compared with a traditional internal combustion engine, the internal combustion engine has the remarkable environmental protection advantage and performance advantage, is suitable for various application scenes, and has wide market prospects and social and economic benefits. Along with continuous progress and cost reduction of a dry ice production technology and mature application of a supercritical carbon dioxide technology, the method is expected to become an important development direction of a power system in the future. According to the clean power solution provided by the invention, carbon dioxide in industrial waste gas is converted into dry ice and is used for driving the engine, so that a closed-loop carbon circulation system is formed, emission of greenhouse gas is reduced, cyclic utilization of resources is realized, and the clean power solution has remarkable environmental benefits and economic benefits.

The invention provides a magnesium alloy treatment method. The treatment method comprises the following steps: S1, sequentially carrying out solution treatment, quenching treatment and shaping on magnesium alloy in an extrusion state or a forging state to obtain a processed profile; s2, the machined profile is subjected to temperature circulation treatment, the temperature circulation treatment comprises the steps that the machined profile is placed in a liquid nitrogen and solid carbon dioxide mixture to be subjected to subzero treatment, then temperature rising, drying and heat treatment are sequentially conducted, the temperature circulation treatment is recorded as temperature circulation treatment, the temperature circulation treatment is repeated for at least two times, and an intermediate material is obtained; and S3, after the intermediate material is subjected to aging treatment, treatment of the magnesium alloy is completed. Through the mutual synergistic effect of all the steps, the internal residual internal stress of the material can be accurately eliminated, the strengthening phase is promoted to be uniformly dispersed and separated out, the strengthening phase density is remarkably improved, then the comprehensive mechanical property of the material is systematically optimized, and the strength fluctuation amplitude of the magnesium alloy is greatly reduced.

The invention discloses a carbon dioxide hydrate compression device based on LNG ship cold energy utilization and a storage method, and belongs to the technical field of ship transportation and environmental protection. The device comprises a carbon dioxide hydrate generation unit, a carbon dioxide hydrate compression unit, a transportation unit, an LNG cold energy supply and refrigeration unit and a safety and detection unit. Carbon dioxide generated in ship smoke achieves carbon capture through a hydrate method, then the carbon dioxide is compressed into blocks through a compressor, the blocks are loaded into a storage container and transferred to a refrigerating chamber, and the refrigerating capacity of the refrigerating chamber is provided by LNG. According to the invention, by efficiently utilizing the cold energy of the LNG ship and adopting a solid carbon dioxide hydrate storage mode, stable and high-density storage is realized, the carbon capture efficiency of the ship is improved, and particularly, transportation resources can be more effectively utilized in long-distance transportation or marine transportation.

The present invention relates to an apparatus and method for preparing dry ice blocks using liquefied carbon dioxide and the dry ice blocks prepared thereby, and includes the following features regarding the preparation of dry ice blocks using liquefied carbon dioxide, that is, liquefied carbon dioxide is injected into the inside of a cylinder having a predetermined internal space, the liquefied carbon dioxide solidifies in the internal space and accumulates at the lower end of the cylinder, and a piston located at the upper end of the cylinder pressurizes the predetermined internal space by descending and compresses and molds the solidified liquefied carbon dioxide pressurized by the piston.

The preparation method comprises the following steps: putting flaky tantalum foil and phosphorus powder into a quartz tube as raw materials, adding iodine powder as a transport agent, and sealing the quartz tube; placing the quartz tube in a beaker filled with dry ice and an acetone solution, and vacuumizing the quartz tube; and putting the sealed quartz tube into a tubular furnace, heating to a reaction temperature of 800-900 DEG C, and preserving heat for 0.8-1.2 hours to obtain the TaP thin layer after the reaction is completed. According to the method, a chemical vapor transport method is adopted, the tantalum foil and the phosphorus powder which are regular in shape grow in a high-vacuum-degree closed environment and serve as raw materials, a small amount of iodine elementary substance is added to serve as a transport agent, the TaP thin layer which is high in quality and good in catalytic performance grows, and compared with pure blocky crystals (211.4 mV), the TaP thin layer has more excellent hydrogen evolution catalytic performance.

The presently disclosed device is made up of a frame (2) that covers from the distal portion of the thigh of the affected extremity to the soles of the feet and has spacer rings inside (33-36-) of structures made of dry ice (carbon dioxide in a solid state, dry ice), memory foam, among others, atraumatic and non-allergenic when in contact with the user's skin, the frame (2) being divisible into at least two shells, anterior casing (4) and posterior casing (3) that are fixed together by means of a series of hooks for closing the casing (20-24), and the frame (2) having expandable upper and lower support bands (−5.29) of rubber that surround the extremity of the user; covered by a porous mesh (1).

This invention provides a carbon dioxide recovery system and method that solidifies carbon dioxide into dry ice and then smoothly liquefies and recovers the solidified dry ice without relying on a scraping mechanism. [Solution] The carbon dioxide recovery system 1 according to the present invention comprises a tube 10a through which a refrigerant passes, a shell 10b adjacent to the tube 10a via a heat transfer wall through which a carbon dioxide-containing gas passes, a carbon dioxide solidification device 10 for solidifying carbon dioxide inside the shell 10b, a carbon dioxide-containing gas supply line 75 for supplying carbon dioxide-containing gas to the shell 10b, a refrigerant supply line 71 for supplying refrigerant to the tube 10a, a liquefied carbon dioxide return line 85 and a liquefied carbon dioxide supply line 87 for circulating and supplying liquefied carbon dioxide to the shell 10b, and a liquefied carbon dioxide heater 40 disposed in the liquefied carbon dioxide supply line 87 for heating the liquefied carbon dioxide flowing through the liquefied carbon dioxide supply line 87.

The utility model relates to the field of cement production, in particular to a cement production device capable of reducing carbon emission, which comprises a stirring barrel, a discharge pipe is fixedly connected to the bottom of the stirring barrel, a carbon dioxide rotary kiln is arranged at the bottom of the stirring barrel, and a first pipeline is fixedly connected to one side of the carbon dioxide rotary kiln. A fan is installed on the first pipeline, a pressurizing machine is installed at one end of the first pipeline, a second pipeline is installed on the pressurizing machine, a collecting box is connected to one end of the second pipeline, a collecting box is placed in the collecting box, a pushing mechanism is arranged in the collecting box, and a sealing mechanism is arranged in the collecting box. When the device is used, carbon dioxide can be pressurized through the pressurizing machine, the carbon dioxide is cooled after being pressurized, and the carbon dioxide falls into the collecting box in the collecting box after being made into dry ice, so that pollution to air and the environment is greatly reduced.

The utility model discloses a high-concentration wastewater softening treatment system which comprises an alkalinity regulating tank, a first flocculation stirring tank, an alkali liquor tank, a second flocculation stirring tank, a first filter tank and a second filter tank which are communicated in sequence, the alkalinity adjusting tank is communicated with a wastewater conveying pump, a first diaphragm dosing pump and a first gasifier for gasifying dry ice; the bottom end of the first flocculation stirring tank is communicated with the bottom end of the alkalinity adjusting tank; the first flocculation stirring tank is communicated with a third diaphragm dosing pump; the alkali liquor pool is communicated with the fourth diaphragm dosing pump and the second gasifier; the second flocculation stirring tank is communicated with a fourth diaphragm dosing pump; a water outlet valve is fixed on the side wall of the second filter tank. Carbon dioxide gas reacts with water to generate carbonic acid, the carbonic acid can be subjected to precipitation reaction with calcium and magnesium ions to generate calcium carbonate and magnesium carbonate precipitates, and the calcium and magnesium ions in the wastewater can be effectively removed and the hardness is reduced by controlling the reaction conditions.