366 results about "Carbon adsorption" patented technology

A modular water treatment and purification system, suitable for home use, is connected to a water supply and contains a closed fluid treatment circuit extending to a water outlet. The closed fluid circuit flows through a plurality of replaceable water treatment modules each having a specific water treatment function, such as the removal of a particular material from the water by the use of filtration, carbon adsorption, ion exchange or the addition of a chemical to balance the desired water conditions. Preferably the circuit also includes traversing a radiation device, for example an ultra violet light, for the purpose of sanitizing the water.

Process and apparatus for reducing organic content of brine comprising subjecting a brine solution to at least two purification treatments selected from electrochemical treatment, chlorinolysis, or other chemical oxidation treatment, carbon adsorption, extraction, biological treatment and chrystallizing treatment; wherein the organic content of purified brine is sufficiently low to enable sense of the purified brine in an industrial process.

The invention relates to a process for purifying and recycling hot water by a membrane method as well as used equipment and process flow thereof. The process is a technology for treating, purifying and recycling hot and industrial high-temperature wastewater on the basis of a membrane method. The process has the characteristics that the combined process of an ultrafiltration and microfiltration membrane system, reverse osmosis, a nanofiltration membrane system, pretreatment, active carbon adsorption, ion exchange, and the like can be operated at high temperature and purify different hot water and wastewater, has dual effects of recycling water resources and heat energy and can adopt different process combinations and process flows according to components of water quality so as to achieve the aims of simplifying the process flows and reducing the system and running cost.

A preparation method for a combined modified straw active particulate carbon adsorption material and use of same. The preparation method for the combined modified straw active particulate carbon adsorption material comprises the following steps: 1) mixing straw powders, distilled water, a binder and a composite mineral, then pelletizing same, and then placing same in a tube furnace for pyrolysis to prepare straw particulate carbon; 2) introducing an inert gas into a modification reagent, adjusting the pH value combined and 3) soaking the straw particulate carbon into the combined modification solution for 30 min, and performing cleaning and drying, so as to obtain a combined modified straw active particulate carbon adsorption material. The combined modified straw active particulate carbon has a good adsorption effect on phosphate group in low-pollution water.

The invention discloses a method and a device for preparing the surface-vitrified carbon adsorption material. Activated carbon powders are mixed with a binder to be shaped up to prepare activated carbon core granules. After that, an inorganic mixture is mixed with pore-adjusting agent to be ground to prepare the vitrification material. The activated carbon core granules are adopted as mother balls and the ceramic material is uniformly adhered onto the surfaces of the carbon core granules. In this way, carbon granules coated by a ceramic raw-material shell are obtained. The carbon granules are dried, preheated at a medium temperature and sintered at a high temperature. After the introducing of nitrogen, the carbon granules are cooled to the room temperature and then discharged. In this way, surface-vitrified activated carbon granules can be obtained. The surface-vitrified carbon adsorption material has the comprehensive adsorption properties of activated carbon and porous ceramic materials and can absorb polar or non-polar pollutants, especially the combined pollutants of heavy metal pollutants, organic contaminants and the like. Meanwhile, PM 2.5 composite pollutants in the flue gas can be purified. The surface-vitrified carbon adsorption material can be further expanded and applied to the cyclic adsorption and removal of the combined pollutants of heavy metal pollutes, N, P, organics and the like in the waste water. The method is simple and practical in technique, small in investment, low in cost, and good in economic and environmental benefits.

A flue gas desulphurization denitration method adopting two activated-carbon adsorption columns (1, 2) in series connection and comprising a flue gas temperature control apparatus and a device therefor are provided. The method includes I) a step of flue gas temperature control and II) a step of desulphurization and denitration, wherein the step of flue gas temperature control comprises (1) a step of subjecting flue gas to first time of cooling by feeding cold air into a flue conveying high-temperature flue gas to activated-carbon adsorption columns from a cold-air inlet at an upstream position (P1) of the flue, (2) spraying cooling water or cold water mist into the flue gas in the flue from a process water spray nozzle at the downstream position (P2) of the position (P1) from which the cold air is fed, and allowing the flue gas to flow along the flue to the adsorption columns, and (3) feeding diluted ammonia gas into the flue gas in the adsorption columns after the flue gas is fed into gas feeding chambers of the adsorption columns. The temperature of the flue gas fed into the adsorption columns is controlled by mixing with the cold air and spraying water. The two activated-carbon adsorption columns (1, 2) in series connection are adopted to significantly increase the denitration efficiency of the device.

The invention discloses an in-situ remediation system and method for synergistically removing organic pollutants of soil and underground water. The method comprises the following steps: uniformly injecting chemical oxidants in chemical oxidant mixing storage tank into the soil and the underground water; generating high-temperature steam through a steam generator, and injecting the high-temperature steam into the soil and the underground water; starting a vacuum pump to extract gas from a vacuum extraction well, forming negative pressure in the well, and promoting desorption of volatile and semi-volatile organic compounds from the soil; and treating and discharging the volatile and semi-volatile organic compounds through a gas-liquid separation tank and an activated carbon adsorption tank. The high-temperature steam heat can activate the chemical oxidants so that degradation and removal of the organic pollutants in the underground water can be further accelerated, the underground water organic pollutants which are not completely degraded are further adsorbed, intercepted and degraded through an iron carbon adsorption permeation wall, so that the purpose of synergistically remediating the soil and the underground water is achieved, and secondary pollution of the soil and the underground water is avoided.

A novel process and apparatus are disclosed for cleaning wastewater containing metal ions in solution, hydrogen peroxide, and high solids, e.g., greater than about 50 mg / l particulate solids. A carbon adsorption column removes hydrogen peroxide in the wastewater feed containing high solids. A ion exchange unit removes the metal ions from solution. The process and apparatus remove metal ions such as copper from a high solids byproduct polishing slurry from the chemical mechanical polishing (CMP) of integrated circuit microchips to form an environmentally clean wastewater discharge.

A novel process and apparatus are disclosed for cleaning wastewater containing metal ions in solution, hydrogen peroxide, and high solids, e.g., greater than about 50 mg / l particulate solids. A carbon adsorption column removes hydrogen peroxide in the wastewater feed containing high solids. A chemical precipitation unit removes the metal ions from solution. The process and apparatus remove metal ions such as copper from a high solids byproduct polishing slurry from the chemical mechanical polishing (CMP) of integrated circuit microchips to form an environmentally clean wastewater discharge.

The invention provides a method which is used for extracting and preparing a black carbon adsorption material by taking plant ash as the raw material. The method comprises the following steps: firstly, a hydrochloric acid solution, the concentration of which is 0.5-2.0 mol / L, is used for processing the plant ash for 3-8 times, each time lasts for 2-6 hours, deionized water is used for fully washing after solid masses are obtained, and then the next step is carried out; secondly, the solid masses obtained in the step one are processed by a mixed acid solution containing 0.25-1.0 mol / L of hydrochloric acid and 0.25-1.0 mol / L of hydrofluoric acid for 3-8 times, each time lasts for 2-6 hours, and the deionized water is used for washing the obtained solid masses until the pH of a flushing fluid is neutral; thirdly, the solid masses obtained in the step two are dried, ground and screened, so as to obtain the more uniform black carbon adsorption material. The method of the invention provides a way for treating a great deal of surplus plant ash in rural districts; at the same time, the black carbon adsorption material obtained by the method of the invention has the advantages of fine particles, high carbon content, large specific surface area and low cost, and can be widely applicable to the adsorption removal of pollutants in various polluted waters.

An emissions control canister including an insert having an elongate well and flange. The insert extends into a chamber such that a carbon adsorption column is a hollow cylinder around the insert. After vapors flow through the column of adsorbent, flow is directed through holes in the flange and out through an atmosphere port. The flow path through the hollow cylinder has an increased L / D ratio and improves emission performance. In a second embodiment, a cylindrical tube surrounds the exit port and extends into the insert, forcing vapor flow along a tortuous path between the cylindrical wall and the insert. In a third embodiment, a final scrubber is added inside the tube.

A hydrocarbon adsorber system in accordance with the invention comprising a carbon adsorber element installed in a throttle body of an internal combustion engine. The element may be installed on a wall or in a groove in the wall of the throttle throat at a location immediately upstream (outside) the throttle blade in the air flow direction, and / or an element may be installed on the downstream surface of the throttle blade itself. When an engine is shut down, the engine throttle normally remains slightly open. Any hydrocarbon emissions must pass through this slight opening, and applying carbon adsorbers to these locations takes advantage of proximity to such an opening, as any hydrocarbon emissions must pass close by the carbon adsorbers and thus have a much-increased probability of being adsorbed, in comparison with prior art more general carbon adsorption sites.

An emissions control canister including an insert having an elongate well and flange. The insert extends into a chamber such that a carbon adsorption column is a hollow cylinder around the insert. After vapors flow through the column of adsorbent, flow is directed through holes in the flange and out through an atmosphere port. The flow path through the hollow cylinder has an increased L / D ratio and improves emission performance. In a second embodiment, a cylindrical tube surrounds the exit port and extends into the insert, forcing vapor flow along a tortuous path between the cylindrical wall and the insert. In a third embodiment, a final scrubber is added inside the tube.

The invention discloses a porous carbon-loaded molybdenum disulfide nanosheet composition material and a preparation method and application thereof. The preparation method includes following steps: (1), utilizing porous carbon to adsorb molybdate to obtain a precursor; (2), in an inert atmosphere, thermally treating the precursor, and enabling sulfur steam to be in vulcanization reaction with the thermally-treated precursor to obtain the porous carbon-loaded molybdenum disulfide nanosheet composition material. Porous carbon adsorption is adopted to confine a molybdenum disulfide precursor, and a raw material precursor is directly converted into a highly-dispersed small-size ultrathin molybdenum sulfide nanosheet through vulcanization operation, so that compared with other methods like a lithium ion intercalation method, a vapor deposition method, a hydrothermal method and a solvothermal method, the preparation method is low in cost, simple in process, clear in product and suitable for large-scale production; the obtained composite material is excellent in water electrolysis hydrogen production catalytic performance and better than other reported similar catalysts.

The invention discloses a preparation method and application of a composite modified straw active granule carbon adsorption material. The preparation method of the composite modified straw active granule carbon adsorption material comprises the following steps: 1) mixing straw powder, distilled water, an adhesive and composite minerals, granulating the mixture, and then, putting the granules intoa tube furnace to be pyrolyzed to prepare straw granule carbon; 2) introducing inert gas into a modified reagent, adjusting the pH value of a solution to be 8-11, adding a ferric nitrate solution, andperforming reaction to obtain a composite modified solution; and 3) soaking the straw granule carbon in the composite modified solution for 30min, performing ultrasonic treatment for 1-12h at 1-8MPa,performing centrifugation and drying, putting the dried straw granule carbon into a muffle furnace to be fired for 2-8h at 200 DEG C, and performing cleaning and then drying to obtain the composite modified straw active granule carbon adsorption material. The composite modified straw active granule carbon has a good absorption effect on phosphate radicals in low-pollution water. The adsorption material is convenient to recover, is favorable for recycling of phosphorus resources, and has wide market application prospects.

The invention relates to a method and device for preparing phosphorus-rich biofertilizer. Phesphorus-rich fertilizer and a carbon adsorption material are obtained through livestock faeces in the steps of squeezing, mixing, drying, carbonization, fine grinding and sorting. Subsequent products obtained after smashing, hydro-thermal treatment and solid-liquid separation of livestock waste can be combined in the preceding steps to be further used, and purified water finally generated can be used for greening. According to the method and device, the livestock faeces and the livestock waste can be effectively used, waste is turned into wealth, the concept of circulating economy and clean production is fully reflected, the adverse influence and risk to the environment are reduced, operation is easy, the technological process saves energy and is remarkable in benefit, operation cost is low, and high-additional-value utilization of products is achieved while harmless treatment of sick and dead livestock is achieved. The method and device have good social benefits, economic benefits and environmental benefits.

The invention relates to a continuous thermal decomposition method and apparatus for sludge. The method comprises the following steps: drying and carbonization: a step of drying and carbonizing to-be-treated sludge at negative pressure; heat exchange and recovery: a step of subjecting high-temperature water vapor produced in the drying process of the sludge to heat exchange and condensation, recovering heat, applying the recovered heat to drying, adsorbing and filtering condensed water with carbon produced by carbonization and then recovering the treated condensed water for cyclic utilization; and treatment of combustion tail gas: a step of cooling flue gas produced by carbonization with the outer wall of a drying system, washing the flue gas with the condensed water, discharging the washed flue gas and subjecting waste water produced in washing to adsorption and impurity removal by carbon produced by carbonization of the sludge so as to form filtered water for cyclic utilization. The continuous thermal decomposition method for the sludge makes full use of heat and products produced in drying and carbonization of the sludge, recovers the heat and cyclically applies the recovered heat to drying and carbonization of the sludge, so a self-sufficient heat energy supply system is established, and no extra energy is consumed; thus, the method is energy-saving and environment-friendly.

The invention relates to a dry method desorption device for organic waste gas activated carbon adsorption, comprising an adsorption tank filled with activated carbon, a waste gas transmission channel, a purified gas transmission channel, a steam generator and a solvent recycler, wherein the adsorption tank is internally provided with a waste gas pipe through which organic waste gas flows and a steam pipe through which desorption steam flows, the steam pipe is arranged in the waste gas pipe, activated carbon is filled in the waste gas pipe and outside the steam pipe, the recycler is also provided with a vacuum pump, and the vacuum pump vacuumizes the recycler before the desorption part operates. The invention simultaneously realizes adsorption and desorption in the same adsorption tank by virtue of two paths, the activated carbon is not directly contacted with the steam, thus maintaining the activated carbon to be dry and avoiding the problems that in the original method, steam is directly used to desorb the activated carbon so that the absorption capability of the activated carbon is reduced due to moisture absorption, and secondary pollution is caused due to emission of combined steam and solvents in the desorption process. The invention has the advantages of saving energy, avoiding pollution and reducing cost.

The invention relates to a zero-discharge purifying treatment method for mine wastewater and mine domestic sewage. The method adopts the technical scheme that after the sewage passes through a grid, the supernatant enters in an equalizing tank; the sewage after pretreatment enters in a lifting pump sump for a purifier, when the sewage water level in the lifting pump sump for the purifier is raised to the upper limit water level, a composite water treatment agent in a chemical feeder and the sewage simultaneously pass through a lifting pump impeller and a pipeline mixer and then enter in a nanofihration circulating purifier after being sufficiently mixed, the sewage and the composite water treatment agent rapidly form a flocculation cake layer in the nanofihration circulating purifier and the sewage is filtered through the flocculation cake layer; the filtrate enters in a high-efficiency denitriding purifier through an intermediate pool and stays for 2-4 h; the sewage after secondary treatment enters in a strong-carbon adsorption purifier for purification; the purified water enters in a water purifying tank and a disinfectant is added. The invention has the advantages that the cost is low, and the water quality after treatment can meet the standard of the regenerated recycle-water.

The invention provides a lithium-sulfur battery diaphragm and a preparation method thereof as well as a lithium-sulfur battery and a preparation method thereof and relates to the technical field of diaphragms. The lithium-sulfur battery diaphragm comprises a support membrane, and the support membrane is compounded with a nitrogen-doped carbon adsorption-conductive coating. The preparation method of the lithium-sulfur battery diaphragm comprises the following steps: coating the support membrane with the nitrogen-doped carbon adsorption-conductive coating, and drying the nitrogen-doped carbon adsorption-conductive coating to obtain the lithium-sulfur battery diaphragm. The lithium-sulfur battery diaphragm relieves the technical problems that a traditional diaphragm basically has no blockingeffect on multiple sulfur ions and can not block polysulfide dissolution and shuttling phenomena; and by compounding the nitrogen-doped carbon adsorption-conductive coating on the support membrane, the polysulfide can be adsorbed to the diaphragm to perform high-conductivity conversion, thereby inhibiting the shuttling effect of polysulfide, reducing the interface reaction resistance, effectivelyrecovering the dissolved sulfur at the interface between the anode and the diaphragm, increasing the utilization ratio of active substances of the anode, and limiting trans-membrane diffusion of polysulfide so as to enhance the cycle performance of the lithium-sulfur battery.

The invention discloses a porous carbon loaded monatomic metal nitrogen coordination composite material and a preparation method thereof. In the composite material, metal is fixed on a porous carbon carrier in an atomic-scale dispersed metal nitrogen coordination form. The preparation method comprises the following steps: (1) adsorbing a metal salt and a complex by using porous carbon to obtain aprecursor; and (2) physically grinding the precursor and a nitrogen source, and carrying out heat treatment in an inert atmosphere. The preparation method is low in cost, simple in process, clear in product, high in loading capacity, good in stability and suitable for large-scale production, and metal is dispersed in an atomic scale. In addition, the porous carbon loaded monatomic metal nitrogen coordination composite material has excellent catalytic performance in oxygen reduction, carbon dioxide reduction and nitrogen reduction reactions, and is obviously superior to other reported catalystsof the same type.

A fluid storage and dispensing system including a vessel containing a low heel carbon sorbent having fluid adsorbed thereon, with the system arranged to effect desorption of the fluid from the sorbent for dispensing of fluid on demand. The low heel carbon sorbent preferably is characterized by at least one of the following characteristics: (i) Heel, measured for gaseous arsine (AsH3) at 20° C. at 20 Torr, of not more than 50 grams AsH3 per liter of bed of the sorbent material; (ii) Heel, measured for gaseous boron trifluoride (BF3) at 20° C at 20 Torr, of not more than 20 grams boron trifluoride per liter of bed of the sorbent material; (iii) Heel, measured for gaseous germanium tetrafluoride (GeF4) at 20° C. at 20 Torr, of not more than 250 grams AsH3 per liter of bed of the sorbent material; (iv) Heel, measured for gaseous arsenic pentafluoride (AsF5) at 20° C. at 20 Torr, of not more than 700 grams AsF5 per liter of bed of the sorbent material; (v) Heel, measured for gaseous trimethyl silane (3MS) at 20° C. at 20 Torr, of not more than 160 grams 3MS per liter of bed of the sorbent material; and (vi) Heel, measured for gaseous ethane (C2H4) at 21° C. at 25 Torr, of not more than 10 grams ethane per liter of bed of the sorbent material.

A flue gas desulphurization denitration method including flue gas temperature control in an activated-carbon adsorption column and a device therefor are provided. The method includes I) a step of flue gas temperature control and II) a step of desulphurization and denitration, wherein the step of flue gas temperature control comprises (1) a step of subjecting flue gas to first time of cooling by feeding cold air into a flue conveying high-temperature flue gas to the activated-carbon adsorption column from a cold-air inlet at an upstream position (P1) of the flue, and (2) spraying cooling water or cold water mist into the flue gas in the flue from a process water spray nozzle at the downstream position (P2) of the position (P1) from which the cold air is fed, adjusting the temperature of the flue gas fed into the adsorption column to be in a preset range of T3, for example, the T3 ranges from 105-150 DEG C. The temperature of the flue gas fed into the adsorption column is controlled by mixing with the cold air and spraying water.

The invention belongs to the technical field of water purifying agents with microorganisms, and particularly relates to a water purifying agent with defect-rich carbon carriers and immobilized microorganisms and a method for preparing the water purifying agent. The method includes placing the defect-rich carbon carriers in culture media; inoculating compound bacterial strains to the culture media; carrying out shaking co-culture to obtain the water purifying agent. The water purifying agent and the method have the advantages that the surfaces of the carbon carriers of the water purifying agent contain oxygen-containing functional groups, and accordingly the problem of hydrophobicity of general carbon carriers can be solved; the surfaces of the carbon carriers contain abundant defects and secondary pore structures, accordingly, large quantity of active sites can be provided for adsorption reaction, and the pollutant adsorption efficiency can be improved; co-culture is carried out on the defect-rich carbon carriers with hydrophilic groups and the microorganisms, and accordingly the microorganisms can be advantageously adsorbed and immobilized by the carbon carriers; organic matters and pollutants which are adsorbed on carbon of the carriers can be efficiently utilized and synergistically degraded by the microorganisms, accordingly, the water purifying agent is hydrophilic, but is easy to precipitate and is quite applicable to treating culture anaerobic sewage on a large scale, carbon adsorption and biological degradation double-purification effects can be realized by the water purifying agent, and the like.

The invention relates to a low-grade copper-bearing gold ore dump leaching-carbon adsorption production method. Copper contained in high-copper gold-carried carbon obtained through a low-grade copper-bearing gold ore dump leaching-carbon adsorption procedure is partially removed by adopting a cyaniding decoppering process, a decoppering solution is diluted by utilizing an adsorption barren solution to be used as a spray solution at the late stage of dump leaching, and decoppering carbon is conveyed to a high-temperature high-pressure cyanide-free desorption-electrodeposition system for treatment. The low-grade copper-bearing gold ore dump leaching-carbon adsorption production method disclosed by the invention has the advantages of simple process flow, small investment, no other original paving material addition, low production cost and the like, and is easy to industrially implement; according to the invention, after the high-copper gold-carried carbon is subjected to cyaniding decoppering, the gold desorption rate of the high-copper gold-carried carbon can be enhanced, and the adsorption property of regenerated carbon is enhanced, so that the adsorption rate of gold is enhanced, and the production technology index is optimized; and a part of copper contained in the decoppering solution and the adsorption barren solution can be deposited in a stock dump again by adopting a copper deposition process at the late stage of the dump leaching, the gold can be leached by utilizing sodium cyanide generated through copper deposition reaction, so that the concentration of copper contained in the dump leaching-carbon adsorption system can be effectively controlled, and the production system can be in a good operating environment all the time.

The invention discloses a porous carbon adsorbent and a preparation method and application thereof. The preparation method comprises the following steps of: adopting glucose and sodium lauryl sulfateas carbon sources, wherein the sodium lauryl sulfate can also be called a soft templating agent; mixing silica sand or glass fiber, the glucose, the sodium lauryl sulfate, water and ethylenediamine, heating the mixture so as to carry out a hydrothermal carbonization reaction so that the surface of the silica sand or the glass fiber can be wrapped by porous carbon which is formed after the hydrothermal carbonization reaction, conducting filtration after the reaction, calcining a sample which is obtained after the filtration in the presence of potassium hydroxide so as to achieve activation, orconducting deliquesce after the calcination so as to obtain the porous carbon adsorbent. According to the porous carbon adsorbent and the preparation method and application thereof, the silica sand orthe glass fiber which has high density can be wrapped by the porous carbon which has low density, and the porous carbon adsorbent can be easily separated from a solution through sedimentation or filtration after use; besides, not only can the effect of strong adsorption of the porous carbon be retained, but also the inconvenience to recycling work of the porous carbon in glass ingredients can beeliminated after metal ions are adsorbed on the porous carbon of low weight, and therefore the application of the porous carbon adsorbent as an adsorbent and a colorant is facilitated.

A polymer-carbon sorbent for removing carbon dioxide, heavy metals and toxic materials from a flue gas from a combustion process, such as coal-fired power plants, is described. The sorbent comprises a carbonaceous sorbent material and a cured amine-containing polymer, and sulfur. The polymer-carbon sorbents are formed by curing a curable amine-containing polymer in the presence of the carbonaceous sorbent material, sulfur, a cure accelerator and, optionally, a cure activator. A convenient carbonaceous sorbent material is an activated carbon, and a convenient curable amine-containing polymer is an allyl-containing poly(ethyleneimine), having a number average molecular weight between about 1,000 and about 10,000. The polymer-carbon sorbents may contain sulfur in excess of an amount needed to cure the curable amine-containing polymer. Such polymer-carbon sorbents are shown to capture more mercury, in both elemental an ionic forms, compared to activated carbon and adsorb carbon dioxide.

A durable carbon pyrolyzate adsorbent having reversible sorptive affinity for hydrogen sulfide, and including the following characteristics: (a) a bulk density as measured by ASTM D2854 in a range of from 0.55 g / cc adsorbent to 1.25 g / cc adsorbent; (b) an H2S capacity in a range of from 140 cc H2S / g adsorbent to 250 cc H2S / g adsorbent, at normal conditions (1 atm, 293.15° K); (c) an H2S capacity in a range of from 1.0 cc H2S / g adsorbent to 15.0 cc H2S / g adsorbent, at partial pressure of 0.76 ton (101.3 Pa) (1000 ppm) of H2S at 293.15° K; and (d) a single pellet radial crush strength in a range of from 7 kilopond (kP) to 40 kilopond (kP) as measured by ASTM D4179. Such adsorbent is usefully employed for capture of hydrogen sulfide from gases containing same, such as H2S-containing gas associated with flowable hydrocarbonaceous material in refining operations, biogas produced by biomass digesters, gas mixtures produced by fluid catalytic cracking (FCC) units, and effluents from power plants gasifying sulfur-containing coal in an integrated gasification combined cycle (IGCC) process.