554 results about "Carbonation" patented technology

Provided herein are methods and compositions for determining and reporting carbon dioxide sequestered and / or carbon dioxide avoided in operations involving concrete, including concrete raw material transport, concrete production, and concrete use.

The invention relates to the technical field of solid waste treatment, in particular to a flotation method and system for waste incineration fly ash decontamination and calcium conservation. The method comprises the steps that waste incineration fly ash is placed in a natural environment to be subjected to a natural carbonation reaction till the pH value is 7-9, pretreated fly ash is obtained and mixed with water, and then a collecting agent and a foaming agent are added for flotation separation; or mixing the waste fly ash by using the sulfuric acid aqueous solution as the flotation liquid, and then adding the collecting agent and the foaming agent for flotation separation; wherein the collecting agent is one or more of butyl xanthate, ammonium dibutyl dithiophosphate and N, N-diethyldithiocarbamate. By means of the method, heavy metal and chlorine salt in the fly ash can be removed, Ca-based components in the fly ash can be reserved, and therefore resource utilization of the waste incineration fly ash is achieved to the maximum extent.

A carbonation device (100) for carbonating a beverage in a container (200), the carbonation device (100) comprising:a head portion (114b) for sealably receiving a mouth portion (220) of the container (200), the head portion (114b) having an infuser (120) that is operable to inject carbon dioxide into the container (200) via the mouth (220) of the container (200); andan engagement feature (173) with which the container (200) can be configured to securably locate the container (200) with respect to the head portion (114b) in:an injection configuration in which the mouth portion (220) of the container (200) is substantially sealed with respect to the infuser (120) so that the infuser (120) can inject carbon dioxide into the container (200) to carbonate the beverage in the container; anda depressurisation configuration in which the mouth portion (220) of the container (200) is partially unsealed with respect to the infuser (120) to allow for depressurization of the container (200).

The invention provides a preparation method for improving the performance and carbon sequestration rate of a steel slag carbonized product, and the preparation method specifically comprises the following steps: (1) weighing the following raw materials in percentage by mass: 50-100 parts of steel slag powder, 13-17 parts of deionized water and 1 part of alcohol amine; (2) mixing the weighed deionized water with alcohol amine to obtain an alcohol amine solution, stirring the alcohol amine solution in a magnetic stirrer, continuously introducing CO2 gas with the concentration of 99.9% to carbonate the alcohol amine solution, and controlling the gas introduction time to be 2 hours; (3) doping an alkylol amine solution subjected to carbonation treatment into the weighed steel slag powder, and uniformly stirring by using a neat paste stirrer; (4) pressing the steel slag mixture into steel slag product briquettes in a compression molding manner; and (5) putting the briquette into a carbonization kettle, and introducing CO2 gas with the purity of 99.9% to prepare a steel slag carbonized product. The problem that the interior of the steel slag carbonized product cannot be fully carbonated and maintained is solved, so that the comprehensive performance and the carbon sequestration rate of the steel slag carbonized product are remarkably improved.

The present invention relates to a process for the carbonation of old concrete or old concrete products as starting product, wherein the starting product is crushed in a first step and moistened in a second step and exposed to a carbon dioxide-containing gas, characterized in that the second step is carried out in a mixer 20 a mechanical fluidized bed with a tool Froude number between 3 and 11.

To provide a method which enables inexpensive production with a high yield of lithium hydroxide with a low amount of impurities such as sodium from lithium-containing water including a lithium ion and a chloride ion.SOLUTION: A production method of lithium hydroxide includes: a crystallizing step of crystallizing lithium hydroxide (LiOH) from lithium-containing water including a lithium ion and a chloride ion; a solid-liquid separation step of performing solid-liquid separation treatment of concentrated liquid including the LiOH to obtain the LiOH as a solid product and filtrate; a carbonation step of producing lithium carbonate from the filtrate by carbonation; a lithium carbonate recovery step of evaporating at least a part of ammonia from a mixed liquid obtained in the carbonation step and performing solid-liquid separation treatment of the resultant treated liquid to obtain lithium carbonate as a solid product; a lithium hydroxide production step of converting the obtained lithium carbonate into LiOH followed by solid-liquid separation treatment to obtain an aqueous LiOH solution (1) as a liquid component; and a recrystallizing step of crystallizing LiOH from the aqueous solution (1).SELECTED DRAWING: Figure 2

The invention relates to the field of coal seam anti-reflection, and particularly discloses a coal seam carbon dioxide and static expanding agent synergistic anti-reflection system and method. Slurry prepared by mixing a static expanding agent and water is injected into the expansion fracturing drill hole, in the process that the static expanding agent is subjected to hydration reaction and generates expansion stress, carbon dioxide gas is injected into the expansion fracturing drill hole through the carbon dioxide gas injection pipe, carbon dioxide and the hydration product of the static expanding agent are subjected to carbonization reaction to generate larger expansion stress, and the expansion fracturing drill hole is formed. Expanding the coal body fractures to form expansion fractures; the carbon dioxide is driven by differential pressure to seep into a coal matrix along expansion fractures, and adsorbed gas is driven to be desorbed into a free state through a competitive adsorption effect; and under the combined action of extraction negative pressure and carbon dioxide displacement, the free-state gas moves from the fracture channel to the extraction drill hole, and extraction is conducted through the gas extraction system. Carbon dioxide and the static expanding agent cooperate to improve permeability of the coal body, the displacement effect of carbon dioxide on gas is promoted, and the gas extraction effect is improved.

The invention discloses a carbonizer and a bubble water device, and relates to the technical field of overflowing carbonation bubble water preparation.The carbonizer comprises a gas mixing box body, a gas inlet pipe, a liquid inlet pipe and a liquid outlet pipe, a containing cavity is formed in the gas mixing box body, and a plurality of partition plates are arranged in the containing cavity at intervals; the partition plates divide the accommodating cavity into an inlet chamber, a throat pipe channel and a turbulent flow channel which are communicated in sequence; the air inlet pipe and the liquid inlet pipe are communicated with the turbulent flow channel inlet chamber; the liquid inlet pipe is connected to the rear end of the turbulent flow channel; the sectional area of the throat pipe channel is smaller than that of the inlet chamber and that of the turbulent flow channel; the turbulent flow channel extends from the side close to the throat pipe channel to the side away from the throat pipe channel, and a plurality of turbulent flow units are arranged in the turbulent flow channel and are arranged at intervals in the extending direction of the turbulent flow channel. The technical scheme provided by the invention is used for improving the carbonization concentration of the sparkling water, so that the taste of the sparkling water is improved.

In various embodiments disclosed herein, a carbonated beverage carafe includes a main body, a base, and a cap. The main body may be any shape desired by the user, but is typically cylindrical. The cap is threaded on to the main body to seal the main body. The device includes a mating mechanism that allows the carafe to be installed in an external carbonation device. In various embodiments, the cap includes a push button device that unseals the carafe to allow liquid to be poured out of the carafe.

Provided herein are methods and compositions for carbonation of recycled concrete aggregates (RCA) to produce carbonated RCA. In addition, uses of the carbonated RCA, such as in building materials, and building materials containing RCA, are included. Carbonation of RCA may be used alone or may be used in combination with other carbonation processes associated with concrete manufacture, such as carbonation of wet concrete mixes and / or carbonation of concrete wash water.

The invention relates to the technical field of building solid waste resource utilization, and discloses a bamboo-based biochar and cement-based waste-based artificial aggregate preparation method, which comprises: using cement-based waste powder as a main raw material, and using ordinary Portland cement and bamboo-based biochar as auxiliary materials, firstly carrying out alkali modification or ultrasonic modification treatment on the bamboo-based biochar, and then carrying out drying to obtain the artificial aggregate based on the bamboo-based biochar and the cement-based waste. The surface property is improved; then mixing the materials, and preparing a regular and uniform aggregate blank by adopting a disc granulation method and accurately controlling the inclination angle and the rotating speed in combination with a reserved dry powder rolling and sticking process; finally, the blank is cured, particularly carbonization curing is adopted, and carbon dioxide and cement hydration products react to generate calcium carbonate to fill internal pores. According to the invention, interface bonding is enhanced through the modified charcoal, the porosity is reduced through carbonization curing, the prepared artificial aggregate has the advantages of high compressive strength and low water absorption, and high-proportion utilization of cement-based wastes is realized.

The invention discloses a processing technology of a quinoa seedling bud green juice bubble functional beverage, and belongs to the technical field of beverage processing. Comprising the steps of raw material pretreatment, crushing and juicing, filtration treatment, enzyme deactivation treatment, blending, sterilization treatment and carbonation treatment. In the filtering process, a product obtained after juicing is filtered through a 200-400-mesh filter screen and then filtered through a filter material; the filter material comprises modified PVDF (polyvinylidene fluoride), modified chitosan, modified MOFs (metal organic frameworks) and modified titanium dioxide. The modified MOFs are obtained by acetylating MOFs and then modifying the MOFs with a silane coupling agent; the modified PVDF is obtained by sequentially grafting sulfobetaine metacrylic acid ester, polyethylene glycol metacrylic acid ester and alkyl acrylate on PVDF; the modified chitosan is obtained by sequentially grafting PEG-acrylic acid and methyl methacrylate to chitosan; the modified titanium dioxide is obtained by modifying titanium dioxide through a silane coupling agent. The chenopodium quinoa seedling buds are made into the bubble functional beverage, so that the beverage is endowed with good taste; the filter material can reduce loss of protein and polyphenol and effectively retain nutritional ingredients.

This method for producing a cement hardened body includes: a molding step for molding a molded body from a molding feedstock containing water and a fine powder of cement hydrate; and a carbonation step for carbonating a calcium-containing component contained in the fine powder of cement hydrate in an atmosphere that contains carbon dioxide, has a partial pressure of carbon dioxide of 3.0 MPa or less, and has a temperature of 80°C or less. The molded body for carbon dioxide fixation contains water and a fine powder of cement hydrate, and the particle diameter of the fine powder of the cement hydrate is 500 μm or less. The cement hardened body contains calcium carbonate, has a carbonation degree of 50% or more, and has a compressive strength of 17 N / mm 2 or more.

The present invention relates to the technical field of supersulfate cement, and specifically discloses a calcium fluoroaluminate-modified high-stability supersulfate cement and its application. The raw materials of the supersulfate cement include the following components: 70-80 parts by weight of mineral powder, 10-15 parts by weight of gypsum, 5-10 parts by weight of calcium fluoroaluminate, and 1-2 parts by weight of modified diatomaceous earth. The modified diatomaceous earth is porous diatomaceous earth microspheres loaded with L-aspartic acid. The present invention utilizes the synergistic effect of the calcium fluoroaluminate and the modified diatomaceous earth to not only improve the early strength of the supersulfate cement, but also effectively improve the chemical stability of the hydration product ettringite (AFt), thereby improving the carbonation resistance of the supersulfate cement and alleviating the problem of long-term strength shrinkage.

The invention provides a concrete carbon sequestration process parameter optimization method, and belongs to the technical field of concrete carbon sequestration. Chemical component data and real-time parameters are input into a carbonization parameter intelligent regulation and control model to obtain regulation values of carbon dioxide concentration, reaction temperature, reaction pressure and water content, and a carbonization reactor is dynamically regulated and controlled; when the carbonization depth is greater than 20mm and the carbon sequestration amount reaches more than 80% of a theoretical maximum value, completing carbonization treatment and recording a process optimization result, and training an intelligent regulation and control model through a parameter regularization framework based on adaptive weight attenuation so that the intelligent regulation and control model can output an optimal parameter adjustment value according to the chemical component difference of the raw material and the real-time change of the carbonization process; the technical problem that the carbon sequestration efficiency is unstable due to the fact that waste concrete carbon sequestration process parameters cannot be dynamically optimized and adjusted according to the chemical component difference of raw materials and the real-time change of the carbonization process is solved.

This invention relates to the field of cement materials technology, specifically to an anti-carbonation early-strength agent for hypersulfate cement and its preparation method. The anti-carbonation early-strength agent comprises: a modified core formed by a water-soluble silicate and a water-storing superabsorbent polymer; an aluminum- and calcium-containing layered bimetallic hydroxide intermediate layer coating the outer surface of the core; and a silicon and / or aluminum active nanomaterial shell layer coating the outer surface of the intermediate layer, thereby forming a Si / Al@Ca / Al-LDHs@modified core dual-core-shell structure. The anti-carbonation early-strength agent of this invention effectively solves the problems of long setting and hardening time, low early strength, and easy carbonation inherent in traditional hypersulfate cement.

An electrocoagulation (EC) reactor and method for simultaneous CO2 capture and brine desalination. The EC reactor includes a reaction chamber that holds brine solution with contaminants, an inlet tube for CO2 gas mixture supply, and a plurality of electrodes (130), submerged in the brine. The electrodes are connected to a power source, applying a voltage to induce electrochemical reactions that precipitate dissolved salts and heavy metals, reducing brine salinity and contaminants, while capturing CO2 in the form of carbonates to form solid coagulants. The method involves introducing brine into the EC reactor's reaction chamber, adding calcium oxide (CaO) and ammonium bicarbonate (NH4HCO3) to create a homogeneous solution, and applying electric current to dissolve the electrodes, producing solid coagulants. A CO2 gas mixture is introduced to facilitate carbonation reactions, forming precipitates like calcium carbonate (CaCO3) and magnesium carbonate (MgCO3), which are filtered to obtain desalinated brine.

The utility model discloses a carbonization detection box for concrete durability detection, which comprises a detection box main body, and a carbonization mechanism is mounted in the detection box main body; the detection box main body comprises a box body; the carbonization mechanism comprises a carbonization box located in an inner cavity of the box body, one end of the carbonization box is in threaded connection with a sealing cover, the surface of the carbonization box is communicated with a first electromagnetic valve and a second electromagnetic valve, the gas inlet end of the second electromagnetic valve is communicated with a manual flow regulating valve, and the gas inlet end of the manual flow regulating valve is communicated with a carbon dioxide gas cylinder. A carbon dioxide sensor is fixedly mounted on the surface of the carbonization box. The carbonation detection box has the advantage of controlling the concentration of carbon dioxide, and solves the problems that the concentration of carbon dioxide in the carbonation detection box is inconvenient to control and the durability change of a concrete test piece under different concentrations of carbon dioxide is difficult to reflect in the use process of the existing carbonation detection box for concrete durability detection.

This application relates to the technical field of comprehensive utilization of fly ash, and specifically discloses a method for extracting alumina from solid waste fly ash. The extraction of the alumina successively undergoes raw material calcination and digestion, desilication treatment of the digested slurry, refining and crystallization of the mother liquor, and roasting and decomposition; among them, the desilication treatment of the digested slurry includes the following steps: adding a desilication agent to the digested slurry, heating for treatment, and filtering to obtain the carbonation mother liquor; the desilication agent is prepared by mixing raw materials in the following mass parts: 65-75 parts of deionized water, 30-40 parts of active desilication powder, 0.5-0.8 parts of dispersant, and 0.2-0.3 parts of stabilizer, and the active desilication powder is obtained by intercalating and compounding modified nano-sodalite and modified kaolin; by using the desilication agent of this application to treat the fly ash mixed raw meal, the removal rate of silicon dioxide in the digested slurry can reach ≥90.37%, and the purity of alumina in the product can reach more than 97.7%.

The invention discloses a metal mine space carbon sequestration system and method based on upward filling of a segmented stope. A closed filling chamber is arranged in a staged blasting stope between a lower-stage filling body and an upper-stage unblasted ore body; an upper-stage drift roadway is arranged between the top of the closed filling chamber and the upper-stage unexploded ore body; a horizontal filling pipeline and a CO2 horizontal filling pipeline which are used for conveying the filling slurry and the CO2 gas to the closed filling chamber are arranged in the upper-stage access roadway, and the CO2 gas is mineralized to realize carbon sequestration through the filling slurry and the CO2 gas in the closed filling chamber. According to the method, the closed filling chamber is arranged in the goaf of the metal mine to seal and store the CO2 gas, the CO2 is utilized to be subjected to carbonization reaction with clinker minerals and hydration products in the filling cementing material, so that the dual purposes of'filling reinforcement 'and'filling carbon sequestration' are achieved, and environmental pollution cannot be generated in the whole CO2 gas sealing and storing process.

Low CAPEX / OPEX, effective, and environmentally friendly process of rapidly extracting lithium from geothermal brines and producing lithium carbonate. The method includes adjusting a unique parameter determined based on the modified alkalinity in a quantity of the geothermal brine to a preset value without needing to purposefully modify the pH. Interactions of the anionic reactant species with components within the geothermal brine cause a solid form of the lithium to precipitate out of the geothermal brine. After the solid separation, the spent brine is environmentally safe and returned underground or transported to a reservoir.

Methods of the present disclosure relate to tailoring cement compositions to withstand carbon dioxide injection. A method comprises predicting a depth of carbonation in a cement sheath; predicting spatially varying mechanical properties of the cement composition due to the carbonation; and determining a mechanical response of the cement sheath based on the spatially varying mechanical properties of the cement composition.

To provide a curing method for concrete pavement for proactively promoting carbonation (neutralization) at a construction site for concrete pavement used in road pavement.SOLUTION: A curing method for concrete pavement (1) includes a process for performing carbonation curing from a bottom surface (1A) of the concrete pavement (1). The carbonation curing process includes the following steps: supplying carbon dioxide gas (CO2 gas) to a construction site; measuring the CO2 concentration; and controlling the CO2 concentration (e.g., maintained within an appropriate range of 0.5% to 80%) of the CO2 gas supplied in the supply step on the basis of the CO2 concentration measured in the measuring step. Preferably, the process includes measuring the temperature and / or humidity of the atmosphere at the construction site and controlling the temperature and / or humidity of the supplied CO2 gas on the basis of the measurement results.SELECTED DRAWING: Figure 1

The invention discloses a novel method for solidifying a foundation through cooperation of microorganisms and active magnesium oxide, and belongs to the technical field of foundation treatment. In a traditional foundation treatment method, a large amount of ore energy needs to be consumed in the production process of a reinforcing material, harm can be brought to the surrounding environment, and serious noise pollution, air pollution and the like are generated. According to the novel method for solidifying the foundation through cooperation of microorganisms and active magnesium oxide, the carbonation reaction between HCO3 <-> in a NaHCO3 solution and active MgO is accelerated through the catalytic acceleration effect of carbonic anhydrase on the CO2 hydration reaction, so that a large number of carbonates such as magnesium carbonate and basic magnesium carbonate with the good gelling effect are generated, solidified soil particles are cemented, and the effect of solidifying the foundation through cooperation of microorganisms and active magnesium oxide is achieved. And the effect of reinforcing the foundation is achieved.

The invention belongs to the technical field of dangerous solid waste treatment, and relates to a cascade deep detoxification method and system for waste incineration fly ash. Comprising the following steps: carrying out natural carbonation pretreatment on the fly ash to stabilize the pH value of the fly ash to be about neutral so as to obtain pretreated fly ash; carrying out primary washing on the pretreated fly ash by adopting an EDTA (Ethylene Diamine Tetraacetic Acid) solution, and carrying out solid-liquid separation to obtain primary washing slag; wherein the residual heavy metals in the first-stage washing slag obtained by the first-stage washing are mainly distributed in a weak acid extraction state; and carrying out second-stage washing on the first-stage washing slag by adopting an acetic acid solution. The method provided by the invention synergistically realizes deep and efficient removal of heavy metals in fly ash, and the final product meets safe disposal or resource utilization standards.

The invention relates to the technical field of functional polymer materials, in particular to an inorganic crystal carbonization alleviator as well as a preparation method and application thereof. The inorganic crystal carbonization alleviator is prepared from raw materials including a solid component and a liquid medium, wherein the mass ratio of the liquid medium to the solid component is (1: 0.5)-(1: 3); the solid component comprises a component containing calcium carbonate and / or calcium silicate and a component containing silicon dioxide, and the mass ratio of the component containing calcium carbonate and / or calcium silicate to the component containing silicon dioxide is (50-80): (20-50). According to the inorganic crystal carbonization alleviator, the calcium silicate mineral is prepared from the calcium carbonate-containing and / or calcium silicate-containing material and the silicon dioxide-containing material, the carbonization resistance of the material is remarkably improved, and the inorganic crystal carbonization alleviator has the advantages of being wide in raw material source and low in cost and can improve and enhance the carbonization resistance when being applied to Portland cement and hypersulfate cement systems.

A process for producing a supplementary cementitious material (SCM), comprising the steps of (i) providing a calciferous feedstock, (ii) subjecting the feedstock to size reduction under phase transition conditions 102 to produce a particulate material, (iii) reacting the material 109 to produce a crude product, and (iv) processing the crude product 111 to give SCM 114. Step (ii) may comprise atomisation or granulation, (iii) may comprise carbonation and (iv) may comprise thickening, dewatering, and / or drying. A system for carrying out the process, and a SCM produced by the process are defined. An atomisation process wherein molten calciferous feedstock is atomised and rapidly quenched to provide a particulate material, and the particulate product produced by the process are defined. A process for carbonising a calciferous feedstock slurry, wherein the slurry is treated using counter-current flow of CO2 rich gas through multiple parallel reactor tanks, and the system for carrying out the process are defined. A process for drying a product using heat recovery from an atomisation process, and a process for producing a SCM comprising carbonating molten slag calciferous feedstock, wherein machine learning is applied with sample analysis to determine the SCM composition and to control the reaction conditions are specified.

To bring an indication material into close adhesion to a concrete hole wall surface in a press-contact state to promote a color reaction of a phenolphthalein agent, thereby improving measurement accuracy.SOLUTION: A method for measuring the depth of neutralization of a concrete structure includes: inserting, into a bore 12, an indication material 1 that is a base material sheet 2 with an elongated shape carrying a phenolphthalein agent-containing layer 3 on its front side; inserting, into a bore space on a rear face of the indication material 1, an elastic tube 6 expandable in a radial direction by a fed fluid; feeding air into the elastic tube 6 to expand the elastic tube 6 in the radial direction, and pressing the indication material 1 against a hole wall surface from the rear face side to bring them into close adhesion in a press-contact state, thereby promoting a color reaction of a phenolphthalein agent; and after the lapse of a predetermined time, removing the fluid from the elastic tube 6 to shrink the elastic tube and drawing out the elastic tube from the bore 12, and pulling out the indication material 1 from the bore 12 and measuring the distance from a concrete opening end corresponding position of the indication material 1 to a coloration region, thereby measuring the depth of neutralization.SELECTED DRAWING: Figure 5

A low capital and environmentally friendly process of extracting lithium from natural brines. The method includes adjusting a unique parameter defined based on the modified alkalinity in a quantity of the natural brine to a preset value independent of the pH. Interactions of the anionic reactant species with lithium within the natural brine cause a solid form of the material that then precipitates out of the natural brine. After the solid separation, the spent brine may be returned to underground or transported to a reservoir.

The invention belongs to the technical field of concrete, and particularly relates to carbon dioxide foam concrete as well as a preparation method and application thereof. Comprising the following steps: obtaining a gel raw material comprising cement, a nano filler and a mineral admixture, and preparing the gel raw material into cement paste; the preparation method comprises the following steps: preparing a foaming solution from a hydrogel thickener, a water repellent agent, a foaming agent and water, and introducing gas containing carbon dioxide to prepare carbon dioxide foam; carbon dioxide foam and cement paste are mixed to prepare mixed paste, and the mixed paste is formed to obtain a formed concrete blank; and performing internal carbonization curing and external carbonization curing on the concrete green body, and performing natural curing to obtain the carbon dioxide foam concrete. Through internal and external carbonization maintenance, a large amount of carbon sequestration is realized, micropores are filled by virtue of a product generated by carbonization, the aperture is refined, the collapse of a foam structure is reduced, the foam concrete is enhanced, the compressive strength and durability of the carbon dioxide foam concrete are improved, and the durability of the carbon dioxide foam concrete can be enhanced.