490 results about "Liquid carbon" patented technology

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 relates to a carbon dioxide combined cooling heating and power supply system, which realizes liquid carbon dioxide energy storage and combined cooling heating and power supply through the technologies of liquid carbon dioxide energy storage, Brayton expansion power generation or pressure increasing heating, carbon dioxide variable-capacity stable-pressure storage and gas transmission, and provides a new energy source for safe and long-period operation and large-scale or small-scale application of an energy storage device. An efficient and feasible technical path is provided for'valley shifting and peak filling 'of photovoltaic power, wind power and a power grid, and the method is suitable for various application scenes such as subway stations, large shopping malls, refrigeration houses or large electricity users.

The invention provides a high-temperature nitrogen synergistic liquid carbon dioxide coal seam anti-reflection effect evaluation method which comprises the steps that an injection hole and a plurality of extraction holes are formed in a target coal seam, and high-temperature nitrogen synergistic liquid carbon dioxide is injected into the injection hole for coal seam anti-reflection; monitoring data in the coal seam anti-reflection process are collected through a sensor arranged on the target coal seam; the monitoring data comprises a temperature gradient of the coal seam, a micro-seismic event of an area where the coal seam is located and gas concentration obtained through extraction; based on the monitoring data, through an LSTM stage identification model, determining different stages of the coal seam anti-reflection process and evaluation values corresponding to the core indexes and the dynamic response indexes in the different stages; the different stages are a carbon dioxide phase change stage, a nitrogen thermal stress fracturing stage and a stable extraction stage; under the condition that the evaluation value meets a preset evaluation condition, the evaluation grade of the permeability increasing effect of the target coal seam is determined; through the technical scheme, the evaluation result can be more scientific and objective.

The utility model belongs to the technical field of rare earth hydrometallurgy and comprehensive utilization of resources, and particularly relates to a device for synthesizing a rare earth mixed precipitant in an ammonia-carbon reinforced manner. The utility model discloses a device for intensively synthesizing a rare earth mixed precipitator by ammonia carbon, which comprises an ammonia carbon intensified synthesis reactor, the ammonia carbon intensified synthesis reactor consists of five groups of plate bundles formed by welding herringbone corrugated plate sheets, and the five groups of plate bundles comprise two groups of gasification plate bundles for gasifying liquid carbon dioxide; the three groups of reaction plate bundles are used for mixing ammonia water and water and reacting with the bulk carbon dioxide, the five groups of plate bundles are wrapped by a metal shell, and an ammonia water, water and liquid carbon dioxide inlet and a circulating cooling water inlet and outlet are reserved outside the shell. Compared with a traditional tower reactor, the tower reactor has the remarkable advantages of being high in equipment integration degree, high in reaction efficiency, low in energy consumption and the like, the energy consumption is saved by 50%, the total investment of equipment is reduced by 50%, the occupied space of the equipment is reduced by 90%, and remarkable innovation is achieved.

The invention discloses a multi-stage self-triggering type liquid carbon dioxide grading fracturing method. The method comprises the following steps that early-stage preparation work is conducted on a multi-stage self-triggering type fracturing pipe; liquid carbon dioxide is filled into the multi-stage self-triggering type fracturing pipe; the multi-stage self-triggering type fracturing pipe is placed in a drill hole in the target fracturing position and then connected with an exploder; the exploder is started, and the multi-stage self-triggering type fracturing pipes conduct multi-stage fracturing in sequence; and after fracturing is completed, the multi-stage self-triggering type fracturing pipe is recycled for reuse. The grading self-triggering fracturing device is constructed on the basis of the gas transfer rule and the memory alloy material, the liquid carbon dioxide single-point excitation and multi-stage self-triggering grading fracturing method is provided, and the problems that power of a liquid carbon dioxide fracturing single pipe is insufficient, and wiring of multiple pipes is complex are solved.

The invention relates to a method for improving the huff-puff effect of carbon dioxide, which comprises the following steps of: when liquid carbon dioxide is injected, monitoring horizon data by using an oil well profile logging instrument, judging whether the liquid carbon dioxide is a target horizon or not by sucking the horizon data, and smoothly injecting the liquid carbon dioxide into the target horizon by adopting a process adjustment or layered injection method, so as to improve the huff-puff effect of the liquid carbon dioxide. The carbon dioxide utilization rate, the measure effect and the effective rate are improved, and the remaining oil potential tapping effect and the oil well recovery rate are improved; when the oil increasing amount of well opening oil production does not reach the standard, whether the output layer is the target layer or not continues to be monitored, if the output layer is not the target layer, the measure target layer can be replaced in time, the layered pipe column structure can be adjusted when liquid carbon dioxide is injected, the purpose that the output layer is the target layer is achieved, and the measure effective rate and effect are improved.

The utility model discloses a recovery system for capturing carbon dioxide. The recovery system comprises a carbon capturing unit, a cooling unit, a drying unit, a liquefying unit and a storage unit which are sequentially connected through pipelines, after the carbon capture unit captures carbon dioxide, the carbon dioxide is cooled by the cooling unit and dried by the drying unit, then enters the liquefaction unit to be compressed and liquefied to form liquid carbon dioxide, and then the liquid carbon dioxide is conveyed to the storage unit to be stored. According to the utility model, CO2 after carbon capture can be stored after being cooled, pressurized and liquefied. The system integrates unloading and reliquefaction functions, liquid CO2 in the storage tank can be lighted to a CO2 receiver, and gaseous CO2 in the storage tank is returned to the storage tank for storage after being cooled, pressurized and liquefied. And the system is provided with a plurality of instruments and meters, so that the whole system is more automatic and safer to operate.

The invention discloses an attitude control power system based on carbon dioxide phase change gas storage, which belongs to the technical field of attitude control, and comprises a thruster, a phase change energy tube, a storage shunting mechanism and a control assembly. The phase change energy tube comprises a shell and an excitation assembly. A sealing cavity is formed in the shell and filled with liquid carbon dioxide. And excitation powder of the excitation assembly is arranged in the sealed cavity. The shell is provided with a sealed air outlet capable of being opened and closed. The storage and distribution mechanism comprises a storage tank and a distribution channel, and the storage tank communicates with the phase change energy pipe. The storage tank is communicated with the flow dividing channel, and the flow dividing channel is provided with an air supply branch pipe which can be opened and closed and corresponds to each thruster. According to the attitude control power system, the attitude adjustment cost can be reduced as much as possible and the system operation convenience can be improved while the rapid response and high specific impulse of attitude adjustment are ensured, so that the accurate regulation and control of the attitude of the aircraft can be realized.

A storage unit for an energy storage system is provided with an energy storage container for storing gaseous carbon dioxide and liquid carbon dioxide, a condenser connected to the energy storage container and used for condensing gaseous carbon dioxide into liquid carbon dioxide and an energy-storage pressure-maintaining flow path forming a closed-loop connection with the energy storage container and the condenser; and in an energy storage stage of the energy storage system and in an interval time period of energy storage and energy release, gaseous carbon dioxide in the energy storage container can flow into the condenser via the energy-storage pressure-maintaining flow path, to be condensed into liquid carbon dioxide, and then flow back to the energy storage container, so as to stabilize, in the energy storage stage, the pressure of the energy storage container in a design pressure range.

The utility model discloses a carbon dioxide fracturing device with a flying stopping device, which comprises a fracturing device body which is cylindrical on the whole, a cavity is arranged in the fracturing device body, liquid carbon dioxide is filled in the cavity, and a filling head used for filling the liquid carbon dioxide into the cavity is arranged at the front end of the fracturing device body. A cavity is formed in the fracturing device body, a heating pipe extending into the cavity is arranged on the front side of the fracturing device body, an energy release channel communicated with the rear end of the cavity is formed in the fracturing device body, a constant-pressure shearing piece used for sealing a front end opening of the energy release channel is arranged at the rear end of the cavity, the flying stopping device is arranged at the rear end of the fracturing device body, and a power input end at the front end of the flying stopping device is communicated with the rear end of the energy release channel. The fracturing device is simple and convenient to operate, the working efficiency is greatly improved, the fracturing device and the rock mass are jacked into a whole by utilizing the impact force of high-pressure airflow during blasting, the phenomenon of pipe flying is effectively avoided, and the fracturing device has important significance on the safety of field work and the improvement of the working efficiency and the economic benefit, and can be suitable for larger hole diameter range of blast holes.

The invention provides a preparation method of a carbon dioxide-assisted water-foamed PIR material, which comprises the following steps: S1, filling polyester polyol and polyether polyol into a reaction kettle, adding a foam stabilizer, a chemical foaming agent, a foaming catalyst, a flame retardant and a chemical foaming agent, and then injecting liquid carbon dioxide to obtain a component A; and S2, taking isocyanate as a component B, mixing the component A and the component B according to a weight ratio of 1: (1.7-2), and carrying out foaming molding by a high-pressure foaming machine. According to the invention, carbon dioxide is adopted to assist water foaming, water is taken as a main chemical foaming agent, liquid carbon dioxide is introduced as a physical foaming agent for synergistic foaming, and the liquid carbon dioxide can generate a large number of uniform bubble nucleation points at the moment of mixing, so that a finer and more uniform closed cell structure can be formed; this is the basis for obtaining excellent thermal insulation and mechanical properties.

The present application provides a ship carbon dioxide tail gas treatment system, the system captures high concentration carbon dioxide captured by traditional CCS capture device, realizes carbon dioxide tail gas utilization electric conversion through electro-catalytic reduction technology, stores or directly discharges liquid organic product mainly in formic acid / formate, replaces existing liquefied storage CCS scheme, reduces energy consumption and storage space, and the product has higher economic value than liquid carbon dioxide.

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 belongs to the technical field of mine slope treatment and dangerous rock body removal, and particularly relates to a mine high slope wedge-shaped dangerous rock body staggered step gas blasting construction method. The method comprises the following steps that construction preparation is conducted, the boundary of the dangerous rock mass is determined, and drill holes are designed; the fracturing device is filled, specifically, the fracturing device is assembled and filled with liquid carbon dioxide; drilling is conducted, specifically, drilling holes are formed according to the step staggering sequence; a fracturing device is installed in a pipe, specifically, the fracturing device is installed in the hole and filled; detonating operation: connecting a detonating network in series and exciting; checking and recycling, namely recycling the equipment after safety is confirmed. According to the method, accurate and controllable crushing of rocks is achieved by optimizing the drill hole arrangement and the staggered step blasting sequence and utilizing huge pressure generated by phase change of liquid carbon dioxide, the defects that a traditional blasting technology is poor in safety, large in environmental pollution, serious in disturbance and the like are overcome, and the method is particularly suitable for dangerous rock mass treatment engineering of mine high slopes and adjacent sensitive facilities.

The invention relates to the field of energy conservation and emission reduction, in particular to a zero-carbon building which comprises a building body, and a heat preservation structure is arranged outside the building body. The carbon dioxide refrigerating and heating system comprises a carbon dioxide system host and a pipeline communicated with the carbon dioxide system host, the carbon dioxide system host is used for converting carbon dioxide, and the pipeline is used for outputting carbon dioxide; the solar cell panel is mounted outside the building main body and supplies power to the host; the heat collector is mounted outside the building main body, so that the carbon dioxide refrigerating and heating system exchanges heat with the outside; the energy accumulator is used for storing heat of the heat collector and / or the carbon dioxide refrigerating and heating system and providing heat for the carbon dioxide refrigerating and heating system; and the energy consumption pieces are all mounted in the building main body and exchange heat with the high-temperature and high-pressure gaseous carbon dioxide or the low-temperature and low-pressure liquid carbon dioxide. The method has the effect of reducing the carbon emission in the daily use process of building facilities.

The present application relates to a kind of natural gas combustion flue gas separation utilization method and its system, comprising the following steps: S1, the flue gas to be treated is catalytically oxidized, so that residual oxygen in flue gas is fully reacted and eliminated;S2, flue gas enters preheater, heat exchange is carried out in preheater, so that the heat of flue gas is reduced;S3, compressor is used to compress flue gas, the temperature of flue gas is increased after being compressed by compressor, high temperature flue gas enters heat exchanger and is cooled by cooling water, wherein the water vapor contained is formed into liquid after cooling and discharged etc..The present application has the advantages that: flue gas generated by natural gas combustion is compressed and two-stage expansion refrigeration is used, liquid carbon dioxide and liquid nitrogen are separated in turn. The separation and utilization of natural gas combustion flue gas are realized, and the carbon dioxide discharged to the atmosphere is significantly reduced.

The application provides a compressed carbon dioxide energy storage system coupling low-temperature molten salt and direct air carbon capture, and relates to the field of energy storage, comprising: a carbon dioxide gas bag, the outlet gas of which is compressed by a carbon dioxide compressor unit, cooled by a subcooler to form liquid carbon dioxide, and sent to a high-pressure liquid carbon dioxide storage tank for storage, the compression heat generated in the carbon dioxide compression process is stored in a hot water tank in the form of hot water; the liquid carbon dioxide output by the high-pressure liquid carbon dioxide storage tank is sequentially passed through a preheater, a primary heater, a primary carbon dioxide turbine, a secondary heater, a secondary carbon dioxide turbine, and then the output carbon dioxide is cooled by a cooler and input into the carbon dioxide gas bag; an external molten salt device provides molten salt heat exchange for the heat conducting oil of the primary heater and the secondary heater; the outlet water of the hot water device provides heat for the regeneration process of a carbon capture device, and the outlet water of the carbon capture device is input into a cold water device. The application uses large-scale long-time energy storage technology to improve the heat utilization rate and peak capacity of a photothermal power station.

The pressure relief device of the liquid carbon dioxide storage tank comprises a storage tank, the upper surface of the storage tank is fixedly connected with a valve body, the bottom of the inner side face of the valve body is connected with a valve element in a sliding mode, and the upper surface of the valve element is fixedly connected with a spring. According to the pressure relief device of the liquid carbon dioxide storage tank, three groups of pressure relief pipes, a connecting rod, a supporting arm, an induction button and an electric bell are arranged, so that the pressure relief speed of the device is increased, the device can realize graded pressure relief, and the safety of the device can be improved; when the storage tank is decompressed, the other end of the supporting arm presses the sensing buttons, so that the electric bell gives out warning sound to remind a worker that the storage tank is decompressed and is careful, the electric bell can be provided with three warning sounds corresponding to the three sets of sensing buttons, the device can give out different warning sounds according to different levels of pressure relief speeds, the effect is better, and use is convenient.

A device for generating carbon dioxide snow has a decompression chamber into which a decompression nozzle opens for decompressing supplied liquid carbon dioxide. According to the invention, the decompression nozzle is integrated into a decompression fitting designed as a two-fluid nozzle, into which, in addition to a supply line for liquid carbon dioxide terminating at the decompression nozzle, a supply line for a liquid or gaseous cleaning medium opens. During a break in operation of the device, when no carbon dioxide snow is being generated, the cleaning medium serves to maintain overpressure in the decompression chamber and / or to remove contaminants adhering to an inner wall of the decompression chamber.

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.

This invention discloses a high-strength pressure vessel steel resistant to liquid carbon dioxide corrosion, which contains Fe and unavoidable impurity elements, and also contains the following chemical elements in the following mass percentages: C: 0.085-0.12%, Si: 0.05-0.30%, Mn: 1.05-1.48%, Alt: 0.015-0.038%, Cu: 0.10-0.30%, Cr: 1.05-1.75%, Mo: 0.18-0.50%, 0 < Sn ≤ 0.0013%, 0 < Sb ≤ 0.0012%, 0 < Ni ≤ 0.30%, and at least one of V, B, and Nb in the following amounts: Nb: 0.018-0.045%, 0 < V ≤ 0.050%, B: 0.0006-0.0018%. Accordingly, the present invention also discloses a method for manufacturing the above-mentioned steel, which includes the following steps: (1) smelting and casting; (2) hot charging and hot delivery of continuous casting billet + heating furnace: the charging temperature of the high-temperature continuous casting billet is directly charged into the heating furnace at 780-880℃, and the heating temperature in the heating furnace is controlled at 1105-1250℃, and the heating rate is 8-13 min / cm; (3) rolling; (4) rapid cooling after rolling: the cooling rate is controlled at 13-42℃ / s, and the final cooling temperature is 300-390℃; (5) heat treatment.

The utility model discloses an electricity-hydrogen-carbon collaborative conveying, control and utilization system, and belongs to the technical field of energy conveying. The system comprises a control system and a conveying pipeline, wherein the conveying pipeline comprises a first pipe body, a second pipe body and a third pipe body which are sequentially arranged from inside to outside; the first pipe body forms a first channel for conveying liquid hydrogen, a second channel is formed between the first pipe body and the second pipe body, the second channel is filled with liquid nitrogen, and a third channel for conveying liquid carbon dioxide is formed between the second pipe body and the third pipe body; a power cable is further arranged in the second channel and used for transmitting electric power. Cold energy in the conveying pipeline is distributed in a uniform gradient mode, multi-stage gradient utilization of the cold energy can be achieved, and the comprehensive energy utilization rate of the liquid hydrogen, liquid carbon dioxide and electric power collaborative conveying system is increased.

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.

This invention discloses a method for preparing a carbon source for microbial culture medium based on enzymatic hydrolysis of bamboo powder and its application, belonging to the field of high-value utilization technology of biomass resources. Using bamboo powder as raw material, the invention involves mild alkali pretreatment to disrupt the dense structure of lignocellulose, followed by enzymatic hydrolysis using a specialized enzyme system of endoglucanase Cel7B and xylanase XynA expressed heterologously by *E. coli* in an optimized ratio. After solid-liquid separation, an enzymatic hydrolysate rich in reducing sugars is obtained. The hydrolysate is then nutritionally fortified with trace elements such as sodium thiosulfate and sodium silicate to produce a low-cost, high-efficiency liquid carbon source. This invention achieves high-value utilization of bamboo waste. The entire process is mild, environmentally friendly, and simple, easily scaled up industrially, and solves the industry bottleneck of high carbon source cost in industrial microbial culture, demonstrating good application prospects and market value.

The utility model discloses a device convenient for realizing intelligent feeding of a liquid carbon source of a denitrification filter tank, and belongs to the field of water treatment. A stirring frame and a temperature control device are arranged in the heat preservation carbon source stirring storage tank; the communication control module is used for receiving a current carbon source adding amount control signal issued by the cloud main control unit, and controlling the flow speed of the dosing pump, namely controlling the carbon source adding amount; a carbon source is added to a denitrification filter in a multi-point manner through multi-point adding combined equipment provided with a plurality of rows of adding pipe frames and adding ports. The device can control the feeding amount of the carbon source in real time while keeping the activity and the using effect of the carbon source, optimizes the denitrification effect and the reaction rate of the reaction tank through multi-point feeding, saves the operation and maintenance cost of a water plant, solves the technical problem that the denitrification system is greatly influenced by inlet and outlet water, optimizes the stability of the denitrification system, and realizes cost reduction and efficiency improvement.

The application discloses a production device and method for enhancing carbon dioxide production, belonging to the technical field of carbon dioxide preparation, which comprises a buffer tank, a compression device, a desulfurization device, a refining device, a liquefaction device, a purification device, a storage bottle, pipeline one, pipeline two, pipeline three, pipeline four, pipeline five, pipeline six, the buffer tank is connected with the compression device through the pipeline one, the desulfurization device is connected with the compression device through the pipeline two, the refining device is connected with the desulfurization device through the pipeline three, the liquefaction device is connected with the refining device through the pipeline four, the purification device is connected with the liquefaction device through the pipeline five, and the purification device is connected with the storage bottle through the pipeline six; the produced liquid carbon dioxide has a purity of 99.9%, and the production has high purity and high efficiency.

The application provides a system for preparing and producing gas by recycling non-condensed gas, comprising: a condensing device provided with a gas inlet, a liquid outlet and a non-condensed gas discharge port; a carbon dioxide liquid storage tank, which is a storage container for storing liquid carbon dioxide and is provided with a liquid inlet, a liquid outlet and a gas outlet; and a gas terminal, which is a device for producing gas containing carbon dioxide and is provided with a gas inlet; wherein the liquid outlet of the condensing device is connected with the liquid inlet of the carbon dioxide liquid storage tank, and the non-condensed gas discharge port is connected with the gas inlet of the gas terminal. By recycling the non-condensed gas discharged from the non-condensed gas discharge port of the condensing device, the carbon dioxide in the non-condensed gas is fully utilized for production, the use of liquid carbon dioxide is reduced, and the emission amount of carbon dioxide is reduced.

This invention discloses a carbon dioxide energy storage and geothermal heat replenishment system and its operation method based on a coaxial sleeve. The system includes a carbon dioxide compressor unit, a carbon dioxide expander unit, a modified coaxial sleeve buried pipe, a heat pump system, a throttling cold storage device, and a liquid storage tank. By modifying the existing coaxial sleeve and utilizing its original properties, the space inside the pipe is used to store liquid carbon dioxide, reducing the use of the liquid storage tank and ground space, and improving the system's economy and safety. The high-temperature source water stored in the annular pipe space enables the replenishment of geothermal energy and the sustainable utilization of geothermal energy during non-heating periods. The modified spiral flow channel also solves the problem of varying heat replenishment demand at different depths during geothermal replenishment. During energy release, the medium-temperature source water stored in the annular pipe space that has completed heat replenishment is extracted and used as a heat source for the heat pump system to utilize the waste heat of the source water, achieving cascade utilization of thermal energy.

The invention discloses a forced cooling assisted double-heat-source aluminum steel dissimilar metal joint additive manufacturing device and a forced cooling assisted double-heat-source aluminum steel dissimilar metal joint additive manufacturing method. The device comprises a CMT welding gun, a CMT power source, a TIG welding gun, a TIG wire feeding device, a TIG power source, a first liquid carbon dioxide cooling device, a second liquid carbon dioxide cooling device, a first mechanical arm, a second mechanical arm, a first argon bottle, a second argon bottle, a first liquid carbon dioxide bottle and a second liquid carbon dioxide bottle. The CMT heat source and the TIG heat source are adopted for conducting independent deposition on the aluminum steel, welding heat input is optimized, the problems that a single heat source easily causes brittle IMCs, welding wires are frequently replaced and the like are solved, the welding-following carbon dioxide gas-solid mixture forced cooling technology is adopted, in-situ rapid cooling is achieved, the cooling rate of a molten pool is effectively increased, element segregation is restrained, generation of the brittle IMCs is avoided, and the welding quality is improved. And the thickness of an interface layer is reduced, and a solution is provided for efficient and high-quality preparation of the aluminum steel dissimilar metal joint.

A process for capturing carbon dioxide (CO2) present in a gas stream is provided. The process includes providing a cooling tower that treats a gas stream. The gas stream including CO2 is introduced into the cooling tower. A liquid carbon-dioxide-capturing media is released into the gas stream in the cooling tower. The carbon-dioxide-capturing media absorbs the CO2 in the gas stream, and the carbon-dioxide-capturing media including the absorbed CO2 is collected. An absorber for capture of CO2 in a gas stream is also provided. The absorber includes a cooling tower for treatment of a gas stream including CO2. The cooling tower includes an input for the gas stream, an outlet for a treated gas stream, and a sprayer that releases liquid carbon-dioxide-capturing media into the cooling tower. The carbon-dioxide-capturing media absorbs the CO2 from the gas stream in the cooling tower. A collector collects the carbon-dioxide-capturing media including absorbed CO2.