133 results about "Granular activated carbon" patented technology

The utility model relates to the technical field of welding devices, in particular to a welding device for a water conservancy construction pipeline, which comprises a base, an electric sliding rail, a support ring a, a hydraulic rod and a clamping plate, an electric sliding rail is connected to the upper surface of the base through a bolt, a supporting ring a is connected to a sliding seat of the electric sliding rail through a bolt, a hydraulic rod is connected to the inner wall of the supporting ring a in a penetrating mode, a clamping plate is connected to the movable end of the hydraulic rod through a bolt, and a welding mechanism is arranged above the portion, close to one side of the electric sliding rail, of the base. According to the welding device for the water conservancy construction pipeline, an electric push rod b is started to make a grinding roller abut against the outer side of the pipeline, then a servo motor is started, the welding position of the pipeline is ground, and the welding strength is improved; smoke generated by welding and scraps generated by polishing are sucked away by starting the Roots blower, dust particles are filtered out through the filter screen box, harmful substances are sucked out through the activated carbon net, and then smoke dust is sucked.

The invention relates to a ferromanganese bimetallic oxide-loaded granular active carbon material, a preparation method and application thereof, and belongs to the technical field of environmental functional materials and water treatment.The preparation method comprises the following steps: determining the saturated water absorption volume of granular active carbon per unit mass; the preparation method comprises the following steps: sequentially and completely dissolving manganese acetate tetrahydrate and iron nitrate nonahydrate in deionized water, then adding citric acid monohydrate, and fully stirring for reaction to obtain a manganese-iron-citric acid sol system; putting the dried granular activated carbon into a manganese-iron-citric acid sol system, uniformly stirring, and standing to obtain iron-manganese impregnated granular activated carbon; transferring the iron-manganese impregnated granular activated carbon into a drying oven for drying to obtain dried iron-manganese impregnated granular activated carbon; the dry iron-manganese impregnated granular active carbon is calcined under the oxygen-limited or oxygen-free condition, equivalent-volume impregnation, a normal-temperature sol-gel method and a high-temperature calcination technology are combined, no organic solvent or high-pressure equipment is needed, operation is safe, no waste liquid is generated, and large-scale production of materials is easy to achieve.

The utility model provides a kind of air purification drying device for bottle blowing, it is related to bottle blowing processing technical field, and it includes: box body;The box body is fixed on bottle blowing equipment, and there is an exhaust pipe welded on the right side of box body, and the exhaust pipe is connected with bottle blowing gas supply pipeline, and filter screen seat is inserted on the box body.The device adopts filter screen and filter box double filtration structure, gas is first intercepted large particle impurities by filter screen, and then passes through filter box filled with filter cotton and activated carbon.Filter cotton can further filter fine particles, and activated carbon can effectively remove odour, harmful gas and other gases by virtue of strong adsorption capacity, and the combination of the two greatly improves the depth and precision of air purification;The base block at the top end of the inner wall of box body is connected with cleaning brush by spring rod, and when pulling filter screen seat, cleaning brush can automatically clean the sundries on filter screen, and spring rod can ensure that cleaning brush is always in close contact with filter screen, even if wear, it can also automatically follow up, reduce manual cleaning frequency, reduce maintenance cost and workload.

The invention discloses a Yellow River raw water coagulation-sand filtration-ultrafiltration treatment system and method based on a composite filter material, and belongs to the technical field of water treatment. The device comprises a coagulation unit, a sand filtration unit and an ultrafiltration unit which are sequentially connected in the water flow direction. Wherein the sand filtration unit is filled with multiple layers of composite filter materials, and the composite filter materials sequentially comprise an aluminum ion modified quartz sand layer, an aluminum ion modified quartz sand layer and an aluminum ion modified quartz sand layer from top to bottom, the granular active carbon layer is used for deeply adsorbing and removing small molecular organic matters; and the manganese sand layer is used for catalytically removing iron and manganese ions and is used as a supporting layer for stabilizing the filter bed. The method comprises the following steps: carrying out coagulation treatment on Yellow River raw water, introducing the treated Yellow River raw water into the composite sand filtration unit, carrying out deep pretreatment, and filtering the pretreated Yellow River raw water through the ultrafiltration membrane. According to the method, through gradient filtration and function cooperation of the composite filter material, the synchronous removal efficiency of turbidity and UV254 can be remarkably improved, high-quality inlet water is provided for an ultrafiltration membrane, membrane pollution is effectively controlled, system operation energy consumption is reduced, and the method has the advantages of being low in resource consumption, little in environmental pollution, good in economic benefit and the like.

The invention relates to equipment and a process for treating fine chemical wastewater through granular active carbon countercurrent adsorption, and relates to the technical field of wastewater treatment. The equipment comprises a countercurrent adsorption tank, granular activated carbon is arranged in the countercurrent adsorption tank, a forward flow water inlet pipe and a countercurrent water inlet pipe are further arranged on the countercurrent adsorption tank, one end of the forward flow water inlet pipe and one end of the countercurrent water inlet pipe are both communicated with the countercurrent adsorption tank, and the other end of the countercurrent water inlet pipe is communicated with the countercurrent adsorption tank. The other end of the forward flow water inlet pipe is communicated with a chemical wastewater source with first concentration, the other end of the reverse flow water inlet pipe is communicated with a chemical wastewater source with second concentration, and the first concentration is smaller than the second concentration; valves are arranged on the forward flow water inlet pipe and the reverse flow water inlet pipe, and the valve on the reverse flow water inlet pipe is used for opening the reverse flow water inlet pipe after the granular activated carbon adsorbs the chemical wastewater with the first concentration. The device has the effect of improving the utilization rate of the granular active carbon in the adsorption tank.

A granular activated carbon (GAC) reactivation waste product enhanced activated sludge system for removing PFAS from a flow of wastewater and / or landfill includes at least one bioreactor including biomass to receive the feed water and to promote growth of biological flocs, and an impregnation subsystem to receive a flow of biomass and a predetermined amount of GAC reactivation waste product and to blend the biomass with the GAC reactivation waste product to form GAC reactivation waste product-impregnated biological flocs. The impregnation subsystem outputs a flow of GAC reactivation waste product-impregnated biological flocs to the bioreactor such that the GAC reactivation waste product-impregnated biological flocs in the bioreactor adsorb to and remove the PFAS from the treated water, and the bioreactor outputs a flow of GAC reactivation waste product-impregnated biological flocs and treated water. The system also includes at least one secondary clarifier coupled to the bioreactor which separates the GAC reactivation waste product-impregnated biological flocs from the wastewater and / or landfill leachate and produces a flow the treated water.

The invention relates to the technical field of granular activated carbon production, in particular to a low-energy-consumption low-emission waste heat and waste gas recycling granular activated carbon production and preparation device which comprises a base, a granulation assembly and a drying assembly, the granulation assembly comprises an extrusion cylinder and a spiral feeding rod, and the extrusion cylinder is fixed to the base and provided with a feeding port and a discharging port; the spiral feeding rod is rotatably arranged in the extrusion cylinder; the drying assembly comprises a receiving and feeding part, a spiral discharging part and a circulating heating part, and the spiral discharging part is fixed to the spiral feeding rod and provided with a spiral discharging channel. The granulation assembly and the drying assembly are integrated on one device, the prepared granular activated carbon can be directly dried, the time for transferring materials is effectively saved, and the efficiency for preparing the granular activated carbon is improved; the integrity of the granular activated carbon structure is not easily damaged in the drying process, and the quality of the finished granular activated carbon product is improved.

The invention discloses a VOCs waste gas continuous treatment device and method based on secondary activated carbon adsorption in the field of air pollution treatment, and aims to solve the technical problems that an existing VOCs waste gas treatment process depends on a boiler, treatment is discontinuous, the investment cost is high, and adaptability is poor. According to the device, an original gas collection pipeline and a fan of an enterprise are reformed, and a first-stage granular activated carbon adsorption unit and a second-stage fine-particle-size activated carbon adsorption unit are connected in series to form a closed-loop treatment system of collection, graded adsorption, pressure-boosting discharge and maintenance and update; according to the treatment method, continuous deep purification of the VOCs waste gas with medium and low concentration is realized by controlling the retention time of the waste gas in the two-stage adsorption unit and the particle size gradient of the activated carbon. The investment is less than or equal to 10 thousand yuan, the treatment gas amount is 8000m / h, the NMHC emission concentration is less than or equal to 50mg / m, the secondary standard of the table 2 of Integrated Emission Standard of Air Pollutants (GB16297-1996) is met, the device can continuously and stably run for more than or equal to 6 months in 24 hours, and the device is adaptive to the waste gas treatment requirements of chemical devices such as acetic acid, methanol and the like.

The application discloses a kind of high-efficiency cleaning methods of fine mud-adhered granular activated carbon, and relates to the field of adsorption separation technology.The method comprises the following steps: immersing granular activated carbon in a first aqueous medium, alternately performing pressure swing treatment by reducing pressure and increasing pressure, and discharging the medium containing fine mud that falls off;then, the activated carbon is cleaned by pulse ultrasonic cleaning using a second aqueous medium, at least two different ultrasonic frequencies are used in the cleaning process, and the medium is synchronously circulated, extracted, separated from fine mud and returned;finally, the activated carbon is treated with a final cleaning solution containing tetrasodium glutamate diacetate and sodium gluconate, and then washed with water to obtain cleaned granular activated carbon.By the synergistic effect of pressure disturbance, multi-frequency pulse ultrasonic, circulating mud removal and chelation cleaning, fine mud adhered to the surface and pores of the activated carbon can be efficiently removed, and the adsorption performance can be restored.The process is efficient and has good cleaning effect.

The utility model discloses a sintering machine flue gas dioxin removal device, and relates to the technical field of sintering flue gas dioxin treatment. A flue gas inlet of a fixed bed activated carbon adsorption tower is connected with a tubular heat exchanger through a connecting pipeline, and an electric air mixing valve is mounted at the connecting pipeline; the adsorption tower is divided into upper, middle and lower parts; the lower end of the lower part is a gas inlet outer hopper, the upper part is fixedly provided with a filler inner hopper, the filler inner hopper is filled with granular activated carbon filler, the lower end of the filler inner hopper is provided with an activated carbon discharge port and penetrates out of the lower end of the gas inlet outer hopper, and a flue gas inlet is formed in one side below the filler inner hopper; the lower end of the middle part is directly communicated with the lower part, and the upper end is separated from the upper part through a uniform distributor; the flue gas outlet is formed in one side of the upper part of the middle part; the upper part of the adsorption tower is used for supplementing and adding filler downwards through the activated carbon feeding hole; the device is simple in structure, easy in filler replacement and flexible in arrangement, and is suitable for removing dioxin pollutants in the flue gas of the sintering machine in iron and steel enterprises.

The invention relates to the technical field of dry cleaning machines, in particular to a dry cleaning machine door opening air purification and regeneration system which comprises a negative pressure gas capturing device and a carbon adsorber, the gas capturing device comprises a negative pressure gas suction port, a negative pressure gas suction channel and a catalytic device, and the negative pressure gas suction port is formed in the circumferential direction of a door frame of a dry cleaning machine; the negative-pressure air suction channel is communicated with the negative-pressure air suction port and the catalytic device, the catalytic device is communicated with the carbon adsorber through an air pipeline, a steam heating pipe, an electric heating pipe, a heat pump and a cold pump are arranged in the catalytic device, and through multi-stage temperature regulation (condensation and heating), the treatment effect on gaseous tetrachloroethylene is remarkably improved; the stainless steel container is filled with granular activated carbon powder, has high specific surface area and good adsorption performance, and can effectively adsorb gaseous tetrachloroethylene, so that the concentration of the tetrachloroethylene in the barrel is reduced to 2g / m < 3 > or below.

This utility model discloses a centrifugal wastewater collection device for the production of sodium dichloroquinoline-8-quinoline carboxylate, belonging to the field of wastewater collection technology. It includes a centrifugal filtration device, a distillation tower, an oxidation tank, a membrane filtration system, an activated carbon adsorption box, and a recovery water tank arranged sequentially. The activated carbon adsorption box includes a box body with several symmetrically arranged support legs at the bottom. An outlet is located at the top of the box body, an inlet is located on the bottom side wall, and a wastewater outlet is located at the center of the bottom. The box body has a water distribution layer, a coarse-particle activated carbon layer, and a fine-particle activated carbon layer distributed sequentially from bottom to top. This centrifugal wastewater collection device for the production of sodium dichloroquinoline-8-quinoline carboxylate purifies the wastewater after centrifugation, allowing it to be reused as process water or cooling water, reducing the amount of fresh water required.

The utility model relates to the technical field of barreled water processing, and discloses an activated carbon filter for barreled water processing, which comprises a filter shell and a filter shell cover mounted at the upper end of the filter shell through a fastener, a filter element assembly is mounted in the filter shell, a sewage discharge plug is mounted at the lower end of the filter shell, and a filter element is mounted in the filter shell. A filter element cover is embedded in the upper end of the filter element assembly, the filter element assembly comprises a filter cylinder, the filter cylinder is sequentially divided into a lower space, a middle space and an upper space from bottom to top, the lower space is filled with large-particle activated carbon, the middle space is filled with medium-particle activated carbon, and the upper space is filled with small-particle activated carbon. The filter element cover, the filter element assembly and the small-mesh filter screen and the medium-mesh filter screen in the filter element assembly can be directly detached, so that small-particle activated carbon, medium-particle activated carbon and large-particle activated carbon can be conveniently replaced; and after three-stage filtration, the water is discharged, so that the filtering effect is effectively improved.

The invention discloses a method for preparing modified granular activated carbon from fibrous plant raw materials and activated carbon, which comprises the following steps: soaking light fibrous plant raw materials difficult to process in citric acid, shredding, adding a certain amount of sodium humate, and fully mixing with diammonium hydrogen phosphate or ammonium dihydrogen phosphate; the preparation method comprises the following steps: preparing heavy particles with the particle size of 8mm-10mm through a hot press molding process at the temperature of 130-190 DEG C by using a granulator, carbonizing at a certain heating speed and temperature, introducing a certain amount of CO2 / N2 or air / water vapor mixed gas, and finally carrying out gradient activation at 850-950 DEG C-1000 DEG C to prepare the high-performance heavy particle active carbon. The defect that a traditional fibrous plant raw material is easily entrained by airflow to enter a tail gas system in the rotary furnace carbonization and activation process due to low density is overcome, and the light fibrous raw material can stably produce activated carbon. Meanwhile, the heavy granular activated carbon is subjected to modification treatment to prepare the modified granular activated carbon.

The utility model relates to the technical field of novel granular carbon adsorption boxes, and discloses novel granular carbon adsorption box equipment which comprises an adsorption box body, a granular carbon drawer is installed at the lower end of the interior of the adsorption box body, an air uniformizing plate is arranged on the left side of the adsorption box body, and a drawer access door is installed at the front end of the adsorption box body. A maintenance door is arranged on the left side of the drawer maintenance door and is mounted on the adsorption box body through a closed hand wheel; according to the novel granular carbon adsorption box equipment disclosed by the utility model, a variable-diameter air equalizing structure is additionally arranged, the air outlet is more uniform, the air equalizing effect is better, an opposite-opening double-V-shaped flow guide structure is additionally arranged, waste gas flow can be better guided to a granular active carbon windward surface, the active carbon windward surface is increased, and the granular active carbon adsorption efficiency is improved.

The invention discloses a preparation method of irregular granular activated carbon for a carbon canister of a fuel vehicle. The preparation method comprises the following steps: crushing a shell raw material, performing magnetic separation, screening and then performing heat treatment; soaking the heat-treated fruit shell particles in a phosphoric acid solution to obtain a pickling material; carbonizing the pickling material in a carbonization converter, and spraying a phosphoric acid solution to obtain a carbonized material; activating the carbonized material to obtain an activated material; carrying out gradient washing on the activated material to separate wet carbon and recover phosphoric acid; carrying out edging treatment on the wet charcoal to remove sharp edges and corners, spraying a polyvinyl alcohol or sodium carboxymethyl cellulose solution, and finally drying and screening to obtain a finished product. According to the invention, heat treatment is combined with segmented phosphoric acid addition to promote pore formation, mechanical edging and surface treatment are utilized to improve the roundness and strength of particles, and the method is suitable for fuel vehicle carbon canisters.

The utility model discloses a VOCS waste gas treatment device, which comprises a waste gas tank, a gas inlet cone box, a delivery pipe, a dispersing pipe, a gas dispersing hole, a filter element assembly, a gas dispersing ring and a circulating assembly, the gas inlet cone box is fixedly arranged at the inner top of the waste gas tank, and the top of the delivery pipe is fixedly arranged at the bottom of the gas inlet cone box. VOCS waste gas enters from the upper inlet pipe, the VOCS waste gas enters the air inlet cone box, solid particles of the VOCS waste gas are intercepted in the coarse particle intercepting layer and the fine particle intercepting layer, and the VOCS waste gas is dispersed from the air dispersing holes of the dispersing pipe; the VOCS waste gas passes through the ceramic particle layer, the zeolite particle layer, the particle active carbon layer, the fiber filter material layer and the filter cloth, so that harmful substances in the VOCS waste gas are effectively filtered out, and atmospheric pollution is avoided; the VOCS waste gas in the circulating pipe enters the inner bottom of the waste gas tank through the circulating fan, and the VOCS waste gas is filtered again through the ceramic particle layer, the zeolite particle layer, the granular activated carbon layer and the fiber filtering material layer until filtering is completed.

The application discloses a microwave regeneration device and method for waste granular activated carbon, which comprises a shell, a plurality of microwave generators, a plurality of temperature sensors, a gas distributor, a stirrer and a controller, wherein the plurality of microwave generators are arranged in a ring shape on the shell, and the radiation surface formed is substantially perpendicular to the running direction of the waste granular activated carbon; the plurality of temperature sensors are uniformly arranged on the inner wall of the shell; the gas distributor is arranged around the waste granular activated carbon, and gas nozzles are uniformly distributed on the gas distributor and arranged towards the inside; the microwave generators and the temperature sensors are connected with the controller; and the stirrer is provided with a plurality of layers of stirring blades.

The utility model discloses a sulfur autotrophic denitrification filter material reinforced constructed wetland microbial fuel cell sewage treatment system which comprises a container main body, the container main body sequentially comprises a gravel water distribution layer, a granular activated carbon anode layer, a sulfur autotrophic denitrification filter material layer, a middle gravel layer, a granular activated carbon cathode layer and a wetland plant layer from bottom to top, anodes are embedded in the granular activated carbon anode layer, cathodes are embedded in the granular activated carbon cathode layer, and the wetland plant layer is arranged in the middle gravel layer. A lead penetrates through the granular activated carbon anode layer and the granular activated carbon cathode layer to connect the anode with the cathode, a water inlet is formed in the gravel water distribution layer, and a water outlet is formed in the wetland plant layer. According to the utility model, the constructed wetland microbial fuel cell and the sulfur autotrophic denitrification technology are combined, so that the dual effects of pollutant removal and electricity generation are realized, a new idea is provided for the combination of the constructed wetland microbial fuel cell and the sulfur autotrophic denitrification technology, and meanwhile, a new direction is provided for the removal of river sewage.

A method for treating a PFAS-laden solid material, comprising: treating a feed fluid with a gliding-arc plasma (GAP) to give rise to a plasma-activated fluid; fluidizing the PFAS-laden solid material; and contacting the PFAS-laden solid material and the plasma-activated fluid in a reaction zone under conditions sufficient to at least partly mineralize at least some of the PFAS so as to give rise to (i) a treated solid material having a reduced PFAS load and (ii) at least one degradation product, the PFAS-laden solid material optionally comprising any one or more of sand, soil, sediment, absorbent media, particulate activated carbon, and ion exchange resin. Other related systems and methods are also described.

Described are wastewater treatment systems comprising a biologically active conduit defining a single, confined serpentine flow path twisting from top to bottom portions. The system establishes sequential aerobic, anoxic, and anaerobic treatment zones populated with zone-specific biological chips containing dominant biologically active media. Mesh separators prevent biological chip displacement between zones while allowing wastewater flow. The system receives influent wastewater through a bottom opening and dispenses treated effluent from the same opening following simultaneous batch treatment across all zones. Methods include wastewater treatment processes, modular assembly techniques, and attribute management systems using adjustable bypass valves and venturi-based air introduction for precise dissolved oxygen control. The systems achieve enhanced PFAS removal by reducing organic matter competition for granular activated carbon (GAC) adsorption sites, extending GAC operational life by at least 25%. Advanced features include dual recirculation capabilities, overflow protection, space-efficient modular design, and fine-tuned control enabling >90% PFAS removal efficiency.

The present application relates to the field of air purification, and specifically provides a filtering component of a photocatalytic air purification device. The filtering component includes carbon dots, photocatalyst particles, an activated carbon layer, and a support portion. The carbon dots are fixedly arranged on the surface of the photocatalyst particles, the photocatalyst particles are fixedly arranged on one side of the activated carbon layer, the activated carbon layer is a porous structure, the support portion is a columnar shell with one end open, the bottom surface of the shell is a mesh structure, the activated carbon layer is fixedly arranged on the inner wall of the support portion, the activated carbon layer is fixedly adhesively connected to the inner wall of the support portion, and the bottom surface of the support portion contacts the side of the activated carbon layer away from the photocatalyst particles. In the filtering component of the present invention, the carbon dots and the activated carbon layer provided can reduce the recombination rate of photo-generated electrons and photo-generated holes inside the photocatalyst particles, improve the intensity of the photocatalytic reaction, and thus improve the purification efficiency. Therefore, the problem that the photo-generated electrons and photo-generated holes in the existing filtering component are prone to recombination and the air purification efficiency is low in the present invention is solved.

The utility model discloses an activated carbon sampling device for an activated carbon pool, a rod assembly comprises a first connecting rod and second connecting rods, and the sampling depth is adjusted by increasing or decreasing the number of the second connecting rods; the sampling assembly comprises a sampling rod and a flow guide plate; the sleeve assembly comprises a sleeve and a third connecting rod, and the sleeve sleeves the rod assembly through the third connecting rod and can move relative to the sampling assembly. During sampling, the sampling assembly is rotated to enable the flow guide plate to collect samples, then the sleeve blade edge is cut into the activated carbon layer, and in-situ water filtering is achieved through the first water permeable holes. The device can obtain the deep sample of the carbon pool without manual excavation, avoids pollution and is convenient to operate; a detachable structure is convenient to adjust the sampling depth and carry and transport; the flow guide plate and the first water permeable holes cooperate to avoid the pond body drainage step, the sampling efficiency is improved, and the detachable connection of the device gives consideration to the operation flexibility and the sampling precision.

The utility model discloses an active carbon filtering device relates to active carbon technical field, the utility model discloses a filtering part is used for filtering to active carbon material, and the anti -blocking part is installed in the filtering part top, the anti -blocking part is used for dredging to active carbon material, wherein, the utility model discloses a filter plate no.

Solid absorbent compositions and methods for removing mercaptan sulfur compounds from hydrocarbon streams are provided. These compositions can include porous granular activated carbon particles having an internal pore surface containing a bound trinuclear basic iron(III) acetate complex containing a [Fe3(μ 3 -O)] core structure.

A granular activated carbon (GAC) reactivation waste product enhanced activated sludge system for removing PFAS from a flow of wastewater and / or landfill includes at least one bioreactor including biomass to receive the flow wastewater and / or landfill leachate and to promote growth of biological flocs and an impregnation subsystem to receive a flow of biomass and a predetermined amount of GAC reactivation waste product and to blend the biomass with the GAC reactivation waste product to form GAC reactivation waste product-impregnated biological flocs. The at least one impregnation subsystem outputs a flow of GAC reactivation waste product-impregnated biological flocs to the bioreactor such that the GAC reactivation waste product-impregnated biological flocs in the bioreactor adsorb to and remove a majority of the PFAS from the flow of wastewater and / or landfill leachate and the bioreactor outputs a flow of GAC reactivation waste product-impregnated biological flocs having a majority of the PFAS adsorbed thereto and wastewater and / or landfill leachate having a majority of the PFAS removed. The system also includes at least one secondary clarifier coupled to the bioreactor which separates the GAC reactivation waste product-impregnated biological flocs having a majority of the PFAS adsorbed thereto from the wastewater and / or landfill leachate having a majority of the PFAS removed and produces a flow the treated wastewater and / or landfill leachate having a majority of the PFAS removed.

The invention discloses saturated activated carbon hydrothermal alkali regeneration equipment and a regeneration method, and relates to the technical field of activated carbon regeneration. The saturated activated carbon hydrothermal alkali regeneration equipment comprises a regeneration reaction kettle. The regeneration reaction kettle comprises a kettle body, a filter screen and a heating device. The kettle body is provided with a containing cavity which can be used for containing regenerated alkali liquor. The filter screen is arranged in the containing cavity and divides the containing cavity into a heating cavity and a regeneration cavity. The filter screen can prevent granular activated carbon from entering the heating cavity. The heating device is arranged in the heating cavity and is used for heating the regenerated alkali liquor in the accommodating cavity. The scheme is beneficial for preventing the activated carbon from being in direct contact with a high-temperature heating device in the regeneration process, and is beneficial for avoiding reduction of the adsorption performance of the regenerated activated carbon due to high-temperature damage of the activated carbon.

The invention discloses a method for optimizing a thermal desorption process of granular activated carbon for waste gas adsorption, which comprises the following steps: S1, taking different sources of granular activated carbon for waste gas adsorption as a raw material, and carrying out qualitative analysis on pollutants adsorbed by the granular activated carbon by using solid-phase extraction and gas chromatography-mass spectrometry; s2, grouping the waste granular activated carbon according to components of pollutants adsorbed by the activated carbon by referring to a result obtained by gas chromatography-mass spectrometry; s3, cleaning, sieving and drying the waste granular activated carbon; s4, placing the dried waste granular activated carbon in a nitrogen atmosphere for thermal desorption; and S5, after thermal desorption is finished, keeping the nitrogen atmosphere for cooling. Through precise operation and optimization measures, the desorption efficiency can be improved to 90%-95%, the overall performance is remarkably improved, the energy consumption is reduced, and the equipment stability is improved.

The invention provides an extraction method of aloe polysaccharide, and belongs to the technical field of extraction of chemical components of aloe. The preparation method comprises the following steps: peeling aloe vera, dicing, soaking in cold water, stirring and crushing to form aloe juice; further heating the aloe juice to homogenize the aloe juice; filtering to remove crude fibers after homogenization, adding granular active carbon into the filtrate for decoloration, filtering to obtain a clear solution, adding ammonia water into the solution, and adjusting the pH value to be alkaline; continuously heating and concentrating the obtained clear solution; adding ethanol into the concentrated solution, adding an ammonium chloride coagulant, standing and precipitating; and centrifugally separating the obtained mixture with the precipitate, and washing and drying the obtained precipitate to obtain the aloe polysaccharide. Compared with a traditional extraction process, the aloe polysaccharide extraction method has the advantages that the process flow is simple, the process condition control operability is high, and the extraction rate of the aloe polysaccharide in the separation process is high. An experiment result shows that the extraction rate of the aloe polysaccharide is up to 11.23% and is obviously higher than that of the traditional extraction process.

The invention provides a preparation method of a monatomic iron-loaded granular active carbon composite material, which comprises the following steps: S1, mixing zinc salt and water to obtain a solution A, and impregnating active carbon granules in the solution A; s2, mixing 2-methylimidazole with water to obtain a solution B, adding the solution B into the mixed system obtained in the step S1 for reaction, and aging to obtain impregnated activated carbon; s3, calcining the impregnated activated carbon, and sequentially performing acid pickling, cleaning and drying to obtain acid-pickled primary calcined activated carbon; and S4, dipping the acid-washed primary calcined activated carbon with a ferric salt solution or a ferrous salt solution, and calcining to obtain the monatomic iron-loaded granular activated carbon composite material. The monatomic iron-loaded granular active carbon composite material provided by the invention can be used for catalyzing peroxymonosulfate to generate active oxygen species, and refractory organic matters in sewage / wastewater are efficiently degraded and removed through an advanced oxidation effect.