1025 results about "Granular activated carbon" patented technology

The present invention discloses the active carbon producing process with mixed stalk material. The mixed stalk material of crop stalk, waste fruit branch and sawdust is produced into powdered or granular active carbon via phosphoric acid process and combined physical process. Or, the mixed stalk material is produced into powdered or granular active carbon in a chemical physical process with potassium hydroxide as activating agent and perchloric acid for pre-treatment of the material. The present invention has small investment scale, low cost, high utility and simple operation, and the product may be used widely.

The water purification cartridge treats water with a halogen liberated from halogenated hydantoinyl resins and polymers, resulting in the safe, complete, and economical purification of non-potable water at low flow rates typically found in gravity feed filtration systems and at water pressures of less than 1 psig. The cartridge of the invention purifies non-potable water of bacteria, viruses, and some protozons without the need for additional power sources or risk to the consumer for exposure to chemicals that have been identified to have harmful, long-term effects. The cartridge described herein enables a gravity fed water purification system by combining the cartridge with conventional filters, such as porous diatomaceous earthen ceramic water filters or activated carbon filters packed either with granular activated carbon or block.

The invention relates to a method and a device for multicomponent oxide pretreatment of organic electroplating waste water, which belong to the technical filed of electroplating waste water treatment in the environment engineering. The pretreatment method is characterized in that organic electroplating waste water is sequentially subjected to acidity adjustment, ferrum-carbon micro-electrolysis reaction and Fenton oxidation reaction. The corresponding device comprises a pH adjusting tank, a ferrum-carbon micro-electrolysis bath and a Fenton oxidation pond; an acid-alkali feeding device and a pH controller which are in link control are arranged above the pH adjusting tank; the middle low part of the ferrum-carbon micro-electrolysis bath is paved with a ferrum-carbon filler layer, while the bottom is provided with a micro-electrolysis bath perforation water distribution pipe; a hydrogen peroxide feeding device is arranged above the ferrum-carbon micro-electrolysis bath; the bottom of the Fenton oxidation pond is provided with a Fenton oxidation pond perforation water distribution pipe; and the middle lower part of the Fenton oxidation pond is provided with a granular active carbon catalytic carrier layer. The method and the device obviously improve the capability of biochemistry, simultaneously perform oxidation reaction to remove mostly organic pollutants and create favorable water inlet condition for subsequent coagulating sedimentation, air flotation and biochemical treatment.

The invention provides a method for preparing grain active carbon with high specific surface area by a physical activation method, comprising the steps as follows: firstly, coconut shell is carbonized under high temperature; subsequently, the crushed and screened carbonization material is arranged in a microwave radiation device; by controlling activation temperature and adjusting activation time and activation gas flux, the raw material is activated so as to gain the grain active carbon product with the specific surface area more than 2200m<2> / g. The method utilizes high-temperature carbonization to improve the micro-pore structure of the carbonization material of the coconut shell, is beneficial for improving the orderly structure of the carbonization material of the coconut shell, reduces the burning of the carbon during the carbonization process and improves the yield of the active carbon product; the prepared active carbon is the grain active carbon, and the applicable range is improved.

The invention discloses a preparing method of high-purity alcaine technology through circulating and adsorbing by-product of hydrogen chloride, which comprises the following steps: aerating hydrogen chloride gas with organic impurity in the condenser at -10- -40 deg.c and gas-liquid separator; adsorbing gas with little impurity through active particle charcoal; aerating adsorbed gas into one-grade and two-grade graphite falling-film; adsorbing through pure water to obtain the high-purity alcaine; adsorbing non-adsorbed hydrogen chloride through cold water; putting hydrogen chloride and diluted acid in the graphite polypropylene falling-film adsorbing tower into cooling groove; utilizing circulating pump to transmit the inlet of one-grade falling-film adsorbing tower; circulating the adsorption.

The invention discloses a three-dimensional particle electrode loaded with catalyst active carbon and a preparation method thereof. The electrode consists of particle active carbon and a TiO2 solid solution compound catalyst which is loaded on the particle active carbon and is doped with Sn and Sb elements. The method comprises the steps of particle active carbon pretreatment, catalyst preparation, soaking for aging, drying and roasting for activating. The three-dimensional particle electrode loaded with the catalyst active carbon prepared with the method has the characteristics of high pollutant removing rate, high electrocatalytic activity, high yield of hydroxyl radicals, little loss of a catalyst and the like; moreover, the preparation method is simple, noble metal catalysts are not used, used raw materials are widely available, the manufacturing cost is low, and secondary pollution is avoided. When the three-dimensional particle electrode loaded with the catalyst active carbon prepared with the method is applied to a three-dimensional electrode reactor, non-biodegradable organic waste water can be treated efficiently.

The invention is directed to methods for improving the DOM uptake of granular activated carbons and the carbons formed according to the methods. The methods include treating starting materials so as to provide a combination of physical and chemical characteristics favorable for DOM uptake. Particular methods utilized depend upon the characteristics of the starting materials but generally include at least one of: increase in surface area of the materials found in pores greater than 1 nm; increase in overall basicity of the materials; and impregnation of the materials with an iron species. The processed materials exhibit improved uptake of DOM from natural waters as compared to previously known GAC materials.

The present invention relates to special active carbon for caramel decolorization and the preparation method thereof. The solid nutshell or coal serves as raw material which is processed by a physical chemistry immersion activation method to create active carbon. The immersion liquid is a water solution mainly comprising phosphoric acid, sodium hydroxide, magnesia and zinc chloride, wherein the proportioning by weight of each component is phosphoric acid: sodium hydroxide: magnesia: zinc chloride = 1:0.8~2.0:0.5~1.0:1~1.5. The obtained active carbon has an iodine value of 800~1000 mg / g, a caramel decolorization ratio of 80~100%, and a mechanical strength of 95%. The material is subjected to carbonizing, immersing, drying and activating treatment to create the active carbon product. The active carbon of the present invention has excellent decolorization property for macromolecule pigment, higher mechanical strength as general physical carbon, and wide application range. The traditional powdery carbon is replaced by granular activated carbon, the decolorizing pot is replaced by decolorizing column, the active carbon is changed from the disposable usage to the repeated and regenerated usage, and the decolorizing system can be continuously operated for a long time.

The invention relates to the field of industrial flue gas pollution control. A multi-layer fluidized bed two-stage activated carbon / coke flue gas simultaneous-desulfurization and denitrification system of the invention comprises a dust removal device (4) and further comprises a desulfurization and denitrification multi-layer fluidized bed reactor (13), wherein a feed port of the dust removal device (4) is communicated with the top of the desulfurization and denitrification multi-layer fluidized bed reactor (13); the desulfurization and denitrification multi-layer fluidized bed reactor (13) is divided into an upper denitrification section and a lower desulfurization section; the denitrification section comprises several layers of fluidized beds; an ammonia gas injection port (10) is formed in a side wall corresponding to a position below the bottom of each layer of fluidized bed; the desulfurization section comprises several layers of fluidized beds; a flue gas inlet (7) is formed in the side wall corresponding to the position below the bottom of a lowest layer of fluidized bed. The system provided by the invention can enhance the mass transfer and heat transfer, improve the efficiency of desulfurization and denitrification, replace high-cost formed activated carbon / coke with fine granular activated carbon / coke to reduce the costs for desulfurization and denitrification, and is suitable for the flue gas purification of power plant boilers, industrial boilers, heating boilers and coking industry.

A gas adsorption material containing a desired quantity of gas is placed in a pressurized container along with a product to be dispensed, and as pressure in the container is depleted during use, stored gas is released into the container to maintain pressure in the container within a predetermined range. The material may be in contact with the product, or it may be isolated from the product, and is known as a pressure swing adsorption (PSA) system, wherein adsorption of gas into the material occurs at a high pressure, and desorption of gas from the material occurs at a low pressure. Such devices are capable of storing under pressure a volume of gas 18 to 20 times the volume of the material. A preferred adsorbent gas storage material is granular activated carbon, or a carbon fiber composite molecular sieve (CFCMS). Other materials, such as zeolite, starch-based polymers, activated alumina, silica gel, and sodium bicarbonate, or mixtures thereof, may be used, although they generally are not as effective as activated carbon. The adsorbent material may be in granular, powdered, or pellet form, or a mass of the material may be formed into variously shaped cohesive bodies, such as balls, tubes, cubes or rods, or sheets or screens which may be flat or curved or folded into various shapes, such as, for example, an accordion-like fold.

The invention discloses a powdered carbon backflow and carbon / sand filter combined process for treating polluted water, which belongs to the field of water treatment. A device comprises a mixing tank, a flocculating tank, a settling pond and a carbon / sand filter which are connected in series in turn, wherein powdered active carbon and a coagulant are added in raw water to be treated, and the raw water is mixed with the coagulant in the mixing tank; the mixed raw water enters the flocculating tank to undergo a flocculation reaction and then enters the settling pond to undergo solid-liquid separation, active carbon mud settled in the settling pond is concentrated in a mud storage chamber and flows back to the mixing tank or flocculating tank by a reflux pump, the concentrated active carbon mud flows back to the mixing tank when the coagulant is added and flows back to the flocculating tank when the coagulant is not added; and water after the settlement enters the carbon / sand filter, the granular active carbon is filled on the upper layer of the carbon / sand filter, and quartz sand is filled in the lower layer. In the invention, a powdered carbon backflow process is adopted, so that over 50 percent of medicinal preparation can be saved; and the physical absorption effect, biological degradation effect and strengthening coagulation effect of the active carbon act in coordination, and the carbon / sand dual-layer filter has the physical absorption and biological degradation effects at the same time.

There is provided a process of reducing concentration of contaminants in a contaminated wastewater stream, such as contaminated wastewater output from a refinery, such as an oil-refinery; the process comprising: first, passing the contaminated wastewater stream into an electrocoagulation reactor for coagulating dispersed particles, filtering the wastewater stream after electrocoagulation for removing the coagulated dispersed particles, and providing a first stream of treated wastewater after the first filtration; second, passing the first stream of treated wastewater into a Spouted Bed Bio-Reactor (SBBR) containing a micro-organism or bacterium immobilized in polyvinyl alcohol (PVA) gel, filtering the first stream after treatment by the SBBR and providing a second stream of treated wastewater after the second filtration; and third, passing the second stream of treated wastewater into an adsorption column containing granular activated carbon (GAC) and providing a third stream of treated wastewater. There is also provided a system for doing the same.

A process for preparing the nano-TiO2 catalyst includes slowly dissolving tetrabutyl titanate in absolute alcohol, immersing the granular activated carbon or active Al2O3 or white silica gel or molecular sieve or zeolite in it, oscillating for 5-48 hrs, filtering, and drying or ageing. It can be used to treat water by making it, ozone and water to be treated in contact for 1-50 min.