37 results about "Increased carbon dioxide" patented technology

The utility model belongs to the technical field of carbon dioxide capture, and discloses a carbon dioxide adsorption device capable of supplementing organic amine on line, which comprises a shell, a bottom partition plate, a solid amine adsorbent, a liquid filling pipe and a spray pipe, the solid amine adsorbent is stacked on the horizontally arranged bottom partition plate, and a vertical axial spiral blade is arranged on the bottom partition plate. The spiral blade separates the solid amine adsorbent to form a spiral flow channel, the liquid filling pipe penetrates through the center of the spiral blade, the spray pipes are evenly arranged along the upper surface of the spiral blade, the spray pipes spray an organic amine solution to the solid amine adsorbent, the liquid filling pipe is communicated with all the spray pipes, and an inlet in the upper end of the liquid filling pipe is communicated with a liquid storage tank of the organic amine solution through a solution input pipe. And the solution input pipe is connected with an input pump. According to the utility model, the flow length of carbon dioxide gas passing through the solid amine adsorbent can be increased under the condition that the volume is limited, the solid amine adsorbent can be continuously impregnated in the adsorption device, regeneration equipment does not need to be additionally purchased, excessive impregnation liquid does not need to be used, and the cost is reduced.

The present invention discloses a low-temperature reverse water vapor shift single atom catalyst and a preparation method thereof, which increases the oxygen vacancy concentration and specific surface area of ​​the catalyst surface by regulating the carrier morphology and rare earth element doping, and the carrier-rich oxygen vacancy concentration is conducive to the adsorption, activation and dissociation of the raw gas carbon dioxide, thereby increasing the conversion rate of carbon dioxide, and at the same time, a transition metal with a specific loading amount is prepared to prepare a transition metal single (Co, Fe, Mo) atom catalyst to synergistically improve the catalyst's selectivity for carbon monoxide under low temperature conditions; the present invention adopts a transition metal nickel (Co, Fe, Mo) single atom catalyst, which not only maximizes the atomic utilization efficiency, but also provides unique electronic properties and unique geometric shapes, so that the catalyst has superior catalytic activity and carbon monoxide selectivity. The present invention is suitable for catalytic hydrogenation of carbon dioxide to produce carbon monoxide.

This invention discloses an apparatus and method for separating carbon dioxide and nitrogen using an inorganic membrane. The apparatus includes at least: a metal outer shell with a mixed gas inlet, a permeate-side outlet, and a residual gas outlet; multiple membrane tubes arranged laterally within the outer shell, sealed and fixed within the shell by a tube sheet to form a shell side and a tube side; the membrane tubes are a structure combining a support and a separation membrane, the separation membrane being a molecular sieve membrane; and multiple baffles arranged radially and alternately along the membrane tubes to form a baffled gas channel. This invention, by using a microporous inorganic molecular sieve membrane as the separation medium and incorporating baffles outside the membrane tubes within the outer shell, effectively increases the separation efficiency of carbon dioxide and nitrogen, thereby significantly improving the performance of membrane separation in capturing carbon dioxide from flue gas.

Disclosed are compositions containing carbonation-cured cementitious materials and a polyanionic polymer, and methods of making thereof. The carbonation-cured cementitious materials contain calcium silicates and the polyanionic polymer can constitute between about 0.01 wt.% and about 10 wt.% of the compositions, or between about 0.01 wt.% and about 10 wt.% of the calcium silicates. Containing the disclosed compositions have (i) increased compressive strength, (ii) increased flexural strength, (iii) increased carbon dioxide sequestration capabilities, (iv) increased calcite content, (v) reduced total pore area, or a combination of (i)-(v) when compared to a composition made from similar materials that are not carbonation-cured and / or not supplemented with the polyanionic polymer.

The utility model belongs to the technical field of spirulina cultivation equipment, and particularly discloses a spirulina cultivation liquid carbon source supplementing device which comprises a supplementing cover, a first ventilation pipe and a second ventilation pipe are connected to the lower portion in the supplementing cover, a plurality of air outlet holes are formed in the first ventilation pipe and the second ventilation pipe, and the first ventilation pipe is connected with an air supply pipe. The second breather pipe is connected with a circulating pipe, the other end of the circulating pipe is connected with a fan, the fan is connected with an exhaust pipe, the exhaust pipe is communicated with the top of the supplementing cover, a carbon dioxide sensor is installed on the exhaust pipe, an electromagnetic gas valve is installed on the gas supply pipe, the carbon dioxide sensor is in communication connection with the controller, and the electromagnetic gas valve is controlled by the controller. The first ventilation pipe and the second ventilation pipe are arranged below the liquid level of the breeding liquid and provided with the air outlet holes, carbon dioxide is introduced into the breeding liquid, the contact time and the contact area of carbon dioxide gas and the breeding liquid can be increased in the floating process of the carbon dioxide, and the carbon dioxide absorption efficiency of the breeding liquid is improved.

This application provides a method for the integrated repair and regeneration of waste cathode materials across the entire supply chain and its application. The method includes the following steps: (1) mixing waste cathode materials with a sodium source and calcining them to obtain sodium-doped waste cathode materials; (2) using the sodium-doped waste cathode materials as an adsorbent to adsorb carbon dioxide to obtain adsorbed cathode materials; (3) mixing the adsorbed cathode materials with a carbon-containing lithium source and sintering them to obtain repaired and regenerated cathode materials. In the recycling and repair process of this application, the sodium ions doped not only increase the carbon dioxide adsorption efficiency but also replace lithium, which can repair lithium defects and effectively improve the structural stability of the cathode materials, reduce the capacity loss of the electrode materials during charging and discharging, stabilize the valence of nickel ions, reduce lithium-nickel mixing, and to a certain extent suppress phase transitions during charging and discharging, thereby improving structural stability and electrochemical performance.

The application discloses a saline-alkali soil treatment system and a treatment method, and belongs to the technical field of soil improvement.The application solves the problems of the existing saline-alkali soil improvement methods, such as incomplete improvement, increased carbon dioxide emission, salt return phenomenon, and unsuitable soil for crop growth after improvement.The saline-alkali soil is divided into upper and lower parts, a percolation pipe is arranged in the upper saline-alkali soil layer, water on the surface of the upper saline-alkali soil layer is rapidly infiltrated into the inside of the soil through the pipe wall of the percolation pipe, and the leaching effect and efficiency are improved;the percolation channel and the conveying channel with the biomass filter column arranged in the lower saline-alkali soil layer, the salt in the saline-alkali soil is eluted and enriched in the soil while the leaching water flows, and the salt dissolved in the leaching water is guided into the adsorption layer in cooperation with the electro-osmosis and vacuum system, and the crystallization rate of the salt in the adsorption layer material is improved through heating strengthening, and then the total salt extraction rate and removal rate are improved.

The utility model discloses a plug-and-play carbon dioxide adsorption and desorption device, and belongs to the technical field of gas production devices.A container for storing a carbon dioxide adsorption material is designed to be a plug-and-play drawer type unit box, and when the adsorption or release efficiency of carbon dioxide needs to be increased, the container can be inserted into the plug-and-play drawer type unit box; when the carbon dioxide adsorption or release efficiency needs to be reduced, the drawer type unit boxes can be directly inserted into the insertion openings in the shell, the newly inserted drawer type unit boxes can directly participate in the carbon dioxide adsorption operation, when the carbon dioxide adsorption or release efficiency needs to be reduced, the corresponding number of drawer type unit boxes can be directly pulled out, and the carbon dioxide adsorption or release efficiency can be reduced. According to the carbon dioxide regulation and control device, the plug-in ports which are not inserted into the drawer-type unit boxes can be sealed through the blocking pieces, gas is prevented from overflowing, compared with a traditional carbon dioxide regulation and control device, the carbon dioxide regulation and control device is high in adsorption efficiency and more convenient to operate, and the adsorption and release efficiency of carbon dioxide can be controlled in the mode that the drawer-type unit boxes are plug-and-play and extracted at any time.

The invention provides a fluidized bed and method for capturing carbon dioxide in mineralized industrial waste gas, and relates to the field of carbon dioxide mineralization. According to the method, purified carbon dioxide is divided into two branches, one branch is used for mixing concrete raw materials, and the other branch is used for ventilating mixed concrete; a mixing mechanism is arranged, carbon dioxide gas and water are mixed firstly, and then liquid in which carbon dioxide is dissolved is mixed with concrete aggregate; a fluidized bed is arranged and used for ventilating the mixed concrete, the inlet end of the fluidized bed is connected with the input mixed concrete, and the concrete mixed with carbon dioxide is discharged from the outlet end of the fluidized bed. According to the method for capturing the carbon dioxide in the mineralization industrial waste gas, the carbon dioxide is introduced into the concrete in two times, the use amount of the carbon dioxide in the mineralization process is increased, especially the step of dissolving the carbon dioxide in water is increased, the use amount of the carbon dioxide is increased, and mineralization of the carbon dioxide is better achieved.

This utility model relates to the field of improving lean liquor quality. It addresses the problem that low lean liquor quality leads to increased carbon dioxide levels in the system, ultimately hindering the stable operation of the ammonia synthesis process. This utility model provides a decarbonization device system for improving lean liquor quality in ammonia synthesis, including a regeneration tower, an absorption tower, a separation unit, a semi-lean liquor unit, a lean liquor unit, multiple processing mechanisms, and a flash evaporation unit. The semi-lean liquor unit is connected to the middle of the regeneration tower. A flash evaporation unit is located between the semi-lean liquor unit and the absorption tower. The lean liquor unit is connected to the bottom of the regeneration tower. Multiple processing mechanisms are connected in parallel between the lean liquor unit and the absorption tower. The separation unit is connected to the top of the regeneration tower. The ammonia decarbonization device system for improving lean liquor quality provided by this utility model can improve the quality of lean liquor and ensure the stable operation of the ammonia synthesis process.

The utility model discloses a kind of carbon dioxide booster pump phase separators, specifically related to phase separator technical field, including separation shell, the inner side end surface of separation shell is equipped with annular baffle, the inside of separation shell is equipped with sealing mounting plate in the upside of annular baffle, the middle part of sealing mounting plate lower end is equipped with flow guide pipe, the lower end of flow guide pipe is equipped with multiple support connecting rods.The utility model is actually used, when carbon dioxide enters the both sides of filter diaphragm under the corresponding setting state of filter diaphragm, annular gas duct, flow guide plate and exhaust pipe, the flow path of carbon dioxide is adjusted by the flow guide plate set, thereby increasing the time length of carbon dioxide and filter diaphragm contact, thereby effectively increasing the efficiency and effect of filter diaphragm to carbon dioxide filtration, and filtered gas is then gathered inside annular gas duct, and is discharged outward from exhaust pipe and exhaust connecting pipe.

The invention discloses a novel converter top-blowing valve station system and a working method. Comprising an oxygen pipeline, a nitrogen pipeline and a carbon dioxide pipeline, an oxygen stop valve, an oxygen filter, an oxygen quick cut-off valve, an oxygen pressure regulating valve and an oxygen flow meter are sequentially arranged at the front end of the oxygen pipeline, and the oxygen pipeline is divided into two oxygen branches which are respectively provided with an oxygen branch first stop valve, an oxygen branch flow regulating valve and an oxygen branch second stop valve; the two pipelines are standby for each other; a nitrogen stop valve, a nitrogen filter, a nitrogen quick cut-off valve, a nitrogen regulating valve and a nitrogen flowmeter are sequentially arranged at the front end of the nitrogen pipeline; a carbon dioxide first stop valve, a carbon dioxide filter, a carbon dioxide rapid cut-off valve, a carbon dioxide adjusting valve and a carbon dioxide flowmeter are sequentially arranged at the front end of the carbon dioxide pipeline. The carbon dioxide pipeline is additionally arranged and connected into the oxygen pipeline, so that pure oxygen top blowing can be achieved, oxygen-carbon dioxide mixed gas top blowing can also be achieved, and the quality of steelmaking products is improved.

The invention relates to a fixed bed adsorption and desorption reactor and a carbon dioxide trapping system and method. The fixed bed adsorption and desorption reactor comprises a main body, a filler assembly, a temperature control assembly and a partition assembly, the main body comprises a flue gas inlet, a flue gas outlet and an inner cavity communicated with the flue gas inlet and the flue gas outlet; the filler assembly is mounted in the inner cavity and divides the inner cavity into an upper cavity body and a lower cavity body; a plurality of groups of partition assemblies are arranged, so that the filler assembly, the upper cavity and the lower cavity are divided into a plurality of subareas; the partition assemblies are provided with air guide channels, one of the air guide channels of the partition assemblies located on the two sides of the same partition is located in the upper cavity, the other air guide channel of the partition assemblies located on the two sides of the same partition is located in the lower cavity, and the carbon dioxide trapping device has the advantage that the carbon dioxide trapping effect is improved.

The invention provides a carbon dioxide storage system for compressed carbon dioxide energy storage and a control method, and can be applied to the technical field of electric energy storage. Based on the system, a plurality of first perforated pipes and a plurality of second perforated pipes are alternately arranged in an adsorption tank in the axial direction, and corresponding adsorbent particle layers are arranged between the adjacent first perforated pipes and second perforated pipes; and meanwhile, a plurality of first perforated pipes and a plurality of second perforated pipes are respectively connected into a heat exchanger connected with a hot tank and a cold tank through an inlet main pipe and an outlet main pipe. Therefore, on one hand, operation of a compressed carbon dioxide energy storage system can be well matched, the contact face of carbon dioxide gas and adsorbent particles is increased in the operation processes of carbon dioxide adsorption, desorption and the like, and the heat exchange efficiency is improved; on the other hand, heat generated in the operation process can be effectively recycled and utilized, heat waste is reduced, and overall energy consumption is reduced.

The invention relates to the technical field of carbon dioxide emission detection, in particular to an enterprise carbon dioxide emission detection device which comprises a shell, an air inlet pipe is fixedly connected to the interior of the shell in a penetrating mode, an alarm lamp is fixedly connected to the outer wall of the top of the shell, and a movable door is movably connected to the front face of the shell. And a control panel is fixedly connected to the interior of the movable door, a box body is fixedly connected to the interior of the shell, and an exhaust shell is movably connected to the outer wall of the top of the box body. The exhaust pipe is driven by the rotating pipe to be directly inserted into lime water, small holes are formed in the rotating pipe and the exhaust pipe to enable carbon dioxide to flow out, the small holes divide the carbon dioxide into micron-sized particles, and the dissolution rate of the carbon dioxide and the lime water is increased; the situation that the detection result is slow due to the fact that carbon dioxide is discharged to the lime water through the gas inlet pipe and enters the lime water through free diffusion of gas is avoided, the carbon dioxide discharge amount is correspondingly and rapidly detected, and therefore the response speed of the detection system is increased.

This invention provides a sustainable and environmentally friendly consolidating material that can be supplied stably and does not cause environmental problems such as environmental pollution or increased carbon dioxide emissions, thereby enabling not only carbon neutrality but also carbon negativity, as well as a method for constructing soil structures and a ground improvement method using this material. [Solution] This solidifying material is mainly composed of silica-containing combustion products, which are obtained by partially burning and cooling land-derived waste and contain SiO2 and carbon as active ingredients. The amorphous silica in the silica-containing combustion products undergoes a hydration reaction and solidifies, thereby enabling carbon negativity.

The utility model provides refrigeration equipment. The refrigeration equipment comprises a shell; a carbon dioxide adsorption mechanism; an evaporator defrosting mechanism; a carbon dioxide outlet is formed in the gas channel and is communicated with the storage chamber. According to the refrigeration equipment provided by the utility model, the carbon dioxide adsorption mechanism is used for adsorbing carbon dioxide at normal temperature, so that the problem that in the prior art, carbon dioxide can be collected only by switching on and switching off an additional power supply is solved, and the energy consumption and the structural complexity of the refrigeration equipment are reduced; the evaporator defrosting mechanism is used for heating, so that adsorbed carbon dioxide can be released in the evaporator defrosting process, the carbon dioxide can be supplemented into the storage chamber to increase the concentration of the carbon dioxide, a heating mechanism does not need to be additionally arranged for heating, and multiple purposes of the evaporator defrosting structure are achieved; the energy consumption of the refrigeration equipment is further reduced, and the user experience of the refrigeration equipment is improved.

The application provides a carbon dioxide liquefaction method, device and ship for a ship, the carbon dioxide liquefaction method for the ship comprising the following steps: compressing carbon dioxide gas to increase the pressure and temperature of the carbon dioxide gas; compressing and expanding air to obtain a heat exchange medium with a temperature lower than that of the carbon dioxide gas; and exchanging heat between the heat exchange medium and the carbon dioxide gas to obtain carbon dioxide liquid. The carbon dioxide liquefaction method for the ship solves the problem of high global warming potential and global warming potential of the commonly used low-temperature liquefied refrigerant of the carbon dioxide gas for the ship by using environmentally friendly air as a refrigerant. Meanwhile, the mechanical energy generated by the air expansion can be output to the first compressor in the process of air expansion, so that the system working efficiency is improved and the system energy consumption is reduced while refrigeration is achieved.

The utility model discloses a carbon dioxide capturing device which comprises an absorption tower and a parallel absorption tower with the same structure as the absorption tower, wherein a plurality of layers of rotating air inlet discs are arranged on the rotating shaft, and a spraying frame is arranged above each rotating air inlet disc; and electromagnetic valves are respectively arranged on the liquid supply pipe and the concentrated liquid conveying pipe. A rotating shaft driven by a driving mechanism is mounted in an absorption tower, a plurality of layers of rotary air inlet discs are mounted on the rotating shaft, and a spraying frame is mounted above each rotary air inlet disc; according to the rotary gas inlet disc, on one hand, the gas turbulence degree below the rotary gas inlet disc is improved through the rotary gas inlet disc so as to increase the gas flow speed and increase the contact area with absorption liquid, and on the other hand, a uniform absorption liquid water film can be conveniently formed on the top face of the rotary gas inlet disc through the centrifugal effect; therefore, the dissolving efficiency of carbon dioxide and absorption liquid is improved.

To provide a CO2 separation system that quickly reduces CO2 concentration in a target space while performing CO2 separation.SOLUTION: A CO2 separation system 1 is a CO2 separation system comprising a CO2 separation part for separating CO2 from circulating air. The system has a first state of circulating air in a target space in an indoor space to the CO2 separation part and sending air with reduced CO2 concentration into the target space, and a second state of ventilating the target space, and comprises a control unit 5 that controls the first state and the second state. The CO2 separation part operates so as to increase CO2 separation capacity with an increase in CO2 concentration of air in the target space. The control unit 5 performs operation in the first state until the CO2 separation capacity in the CO2 separation part reaches a reference value, and performs operation by combining the first state and the second state when the CO2 separation capacity exceed the reference value.SELECTED DRAWING: Figure 1

The present application relates to the field of alkali production, and particularly relates to a combined alkali production soda ash carbonization tower, which comprises a tower body and a tower plate assembly, the tower plate assembly comprises a cap and a sieve plate, sieve holes are formed in the bottom of the sieve plate, a flow guide pipe is connected downward in the sieve holes, a rotating pipe is coaxially arranged on the flow guide pipe, the rotating pipe is rotationally connected with the flow guide pipe, the bottom of the rotating pipe is connected with a curved pipe, the rotating pipe is connected to the middle of the curved pipe, and liquid outlets are arranged at the two ends of the curved pipe, the present application has the following beneficial effects: the ammonia mother liquor flows out of the sieve holes and is sprayed by the curved pipe, so that the ammonia mother liquor is more fully contacted with the carbon dioxide gas, the flow speed of the carbon dioxide gas is increased by the rotation of the fan blades, the absorption efficiency of the ammonia mother liquor for the carbon dioxide gas is further increased, and the reaction is more sufficient.

The utility model discloses a device for automatically controlling the temperature of carbon dioxide gas, which comprises a thermal regeneration tower and a bypass pipeline, the top end of the thermal regeneration tower is communicated with a hot flash steam condenser circulating water heat exchanger through a guide pipe, and one end of the hot flash steam condenser circulating water heat exchanger is communicated with a carbon dioxide product gas recuperator through a guide pipe. The gate valves and the bypass pipelines are additionally arranged on the inlet and outlet pipelines of the circulating water heat exchanger of the hot flash steam condenser, so that hot flash steam can pass through the bypass pipelines to isolate the heat exchanger for maintenance under the condition that circulating water quality is poor and the circulating water heat exchanger of the hot flash steam condenser leaks; a remote thermometer and a hot flash steam condenser circulating water heat exchanger bypass automatic regulating valve are additionally arranged at an outlet of the carbon dioxide product gas recuperator, so that the heat exchange effect of the hot flash steam condenser circulating water heat exchanger is reasonably controlled, the use amount of circulating water is saved, meanwhile, the temperature of urea feeding carbon dioxide gas is guaranteed, and the loss of the cooling capacity of the system is avoided.

The utility model relates to flue gas separation technical field discloses a kind of integrated device of coal-fired power plant carbon dioxide capture coupling synthetic fuel preparation, and the integrated device of coal-fired power plant carbon dioxide capture coupling synthetic fuel preparation includes installation platform, carbon dioxide capture component and synthetic fuel preparation component, carbon dioxide capture component is located on installation platform, carbon dioxide capture component is communicated with the flue gas outlet of coal power plant, for capturing carbon dioxide in flue gas;Synthetic fuel preparation component includes first inlet and second inlet, first inlet is communicated with the carbon dioxide outlet of carbon dioxide capture component, second inlet is input hydrogen, and synthetic fuel preparation component is used to form liquefied hydrocarbon with hydrogen and carbon dioxide reaction.According to the integrated device of coal-fired power plant carbon dioxide capture coupling synthetic fuel preparation of the utility model, avoid the secondary compression, long-distance transportation and intermediate storage etc. link when carbon dioxide synthetic fuel, increase the utilization rate of carbon dioxide.

The invention discloses a low-temperature methanol washing decarburization device, which relates to the field of low-temperature methanol washing, and comprises the following steps: carrying out decarburization treatment on rich methanol in a low-temperature methanol washing process by adopting a built-in filler device, and reducing the internal pressure of methanol, reducing the solubility of carbon dioxide and enhancing the removal effect of carbon dioxide under the action of a filler capillary tube; the retention time of carbon dioxide in the system is prolonged through filling of filler micropores, the heat exchange effect of a gas-liquid system is enhanced through the large specific surface area of the filler, and cold energy is fully recycled; and the filler has water absorption and can be used for removing water in methanol. The device is reasonable in structure, and the molecular sieve funnel is arranged, so that the carbon dioxide separation efficiency can be effectively improved, the cold energy recovery is improved, and the methanol water content is controlled. The molecular sieve funnel is arranged at the lowermost part of the tank body, so that the cold transfer can be effectively increased, the device investment is reduced, the energy is saved, and the low-temperature methanol washing process is stably carried out.

The utility model discloses a manual high-frequency jet ventilation connecting pipe capable of monitoring CO2, which belongs to the technical field of medical instruments and comprises a ventilation pipe, a connector and a monitoring structure, and the connector is fixedly mounted at one end of the ventilation pipe; an O2 injection pipe and an air injection pipe are arranged in the breather pipe; the monitoring structure comprises a gas guide pipe, a CO2 monitoring pipe and a dismounting structure, the gas guide pipe is arranged in the breather pipe and the connector, the two ends of the gas guide pipe extend out of the breather pipe and the connector respectively, and the CO2 monitoring pipe is arranged on the side, close to the connector, of the gas guide pipe. According to the manual high-frequency injection ventilation connecting pipe capable of monitoring CO2, a CO2 monitoring instrument can be conveniently connected through the connecting threads at the top of the gas guide pipe, real-time monitoring of CO2 can be achieved through cooperative use of the CO2 monitoring pipe and the CO2 monitoring instrument, air can be introduced through the air injection pipe, dispersion of the carbon dioxide is increased, accumulation of the carbon dioxide is reduced, and the CO2 monitoring efficiency is improved. Complications such as carbon dioxide anesthesia are prevented.

The invention relates to the technical field of self-rescue in coal mine wells, and discloses a self-rescue device for drowning prevention in coal mine wells, which comprises a self-rescuer shell, a shoulder strap and a waist strap are respectively arranged on the self-rescuer shell, a life buoy is arranged on the outer surface of the self-rescuer shell, and an oxygen bottle group is detachably mounted in the self-rescuer shell. A cleaning tank is fixedly installed in the self-rescuer shell, a first one-way valve is arranged at the top of the cleaning tank, a valve hole is formed in the first one-way valve, and the top of the first one-way valve fixedly communicates with a breathing air bag. According to the self-rescue device for drowning prevention of the coal mine well, comprehensive optimization of the carbon dioxide absorption process is achieved through the dustproof assembly, the material turning and shifting net push-pull mechanism and the guide limiting mechanism; the absorption efficiency of the carbon dioxide is remarkably improved by increasing the contact area of the carbon dioxide and the carbon dioxide absorbent, reducing the obstruction of a precipitation layer, optimizing the flowing of airflow, reducing the raising of dust and the blockage of meshes and the like.

This invention provides a construction material that is sustainable and environmentally friendly, and a ground improvement method using it, which can be used for structures as well as ground improvement applications, by using materials that can be supplied stably and do not cause environmental problems such as environmental pollution or increased carbon dioxide emissions. [Solution] A construction material whose main component is incinerated ash obtained by burning waste derived from marine and / or land products, wherein amorphous silica incinerated ash is the main component and Ca-containing incinerated ash containing at least Ca is used as a reactant, and which is used for structural purposes or as a solidifying agent in chemical grouting, high-pressure jet mixing, or mixing-type ground improvement methods. A ground improvement method using the above construction material when improving the ground by chemical grouting, high-pressure jet mixing, or mixing-type ground improvement methods.

The invention discloses a combined negative carbon stiff mixing pile and a construction method, and belongs to the technical field of mixing pile carbonization and reinforcement processes. Semicircular hollow hoops are tightly connected to the outer wall of a hollow prefabricated pipe pile through a strong double-faced adhesive layer pre-coated on the inner wall in advance; the ventilation connecting pipes and the semicircular hollow hoops are sequentially arranged at equal intervals from top to bottom and are connected in series to form a communicating system; after the construction of the soft soil foundation stirring pile prepared from the industrial solid waste-based negative carbon alkali-activated gel for grouting is finished, the prefabricated pipe pile is inserted into the stirring pile; and after the mixing pile is solidified to the expected age, a CO2 aerostatic press is connected through an inlet of a connecting pipe of the negative carbon ventilation system at the top of the pile to convey carbon dioxide, and carbonization and mineralization construction is completed on the whole stiff composite pile body. According to the combined negative carbon stiff mixing pile and the construction method, the construction cost is effectively reduced, meanwhile, more exhaust hole positions are arranged, the migration and diffusion efficiency of carbon dioxide in the mixing pile body is improved, and the uniformity of the carbonization effect is guaranteed.

Cementitious compositions comprising lime, which may be foamed or non-foamed compositions, may increase carbon dioxide uptake of the cementitious compositions. Said cementitious compositions may be used in various cementing methods including pre-casting methods, cast-in-place methods, and primary or secondary cementing operations in a wellbore. The carbon dioxide may be added to the cementitious compositions during mixing, during pre-conditioning, during curing, or any combination thereof. Further, the carbon dioxide may be delivered as a gas (e.g., a gas that includes 1 vol % to 100 vol % carbon dioxide) or as a gas-entrained admixture that includes the gas, water, and a foaming agent.

The invention provides refrigeration equipment and a control method thereof. The refrigeration equipment comprises a shell; a carbon dioxide adsorption mechanism; an evaporator defrosting mechanism; a carbon dioxide outlet is formed in the gas channel and is communicated with the storage chamber. According to the refrigeration equipment and the control method thereof, the carbon dioxide adsorption mechanism is used for adsorbing carbon dioxide at the normal temperature, the problem that in the prior art, carbon dioxide can be collected only by using additional power supply on-off is solved, the energy consumption and the structural complexity of the refrigeration equipment are reduced, and the cost is reduced. The evaporator defrosting mechanism is used for heating, so that adsorbed carbon dioxide can be released in the evaporator defrosting process, the carbon dioxide can be supplemented into the storage chamber to increase the concentration of the carbon dioxide, a heating mechanism does not need to be additionally arranged for heating, and multiple purposes of the evaporator defrosting structure are achieved; the energy consumption of the refrigeration equipment is further reduced, and the user experience of the refrigeration equipment is improved.