107 results about "Carbon adsorption" patented technology

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a pretreatment method for improving the leaching rate and the carbon adsorption rate of high-sulfur-arsenic gold ore. Comprising the following steps that the high-sulfur-arsenic gold ore is ground and then prepared into ore pulp; a green oxygen activating agent and hydrogen peroxide are sequentially added into the ore pulp, oxidation pretreatment is conducted on the high-sulfur-arsenic gold ore, ore pulp activating liquid is formed, and the green oxygen activating agent is a mixture of calcium oxide, sodium persulfate and soluble bivalent iron salt; and adding a gold leaching agent into the ore pulp activation solution, adjusting the pH value of the ore pulp to 9-12, carrying out stirring gold leaching treatment, filtering to obtain a leaching solution, and then adding activated carbon to adsorb and extract gold. According to the method, a stronger oxidation environment is provided, meanwhile, the residual concentration of arsenate radicals in the solution is effectively reduced, the leaching rate of gold and the adsorption rate of activated carbon are greatly increased, excellent oxidation performance and environment friendliness are shown, and a more sustainable high-sulfur-arsenic gold ore pretreatment process is provided.

The invention provides a flotation pretreatment reagent system and a method for treating gold-bearing waste soot and recycling gold through the flotation pretreatment reagent system, and belongs to the technical field of hydrometallurgy. According to the invention, a multi-agent synergistic agent system is designed, a gold recovery system of'catalytic oxidation-bridging anchoring-hydrophobic flotation 'is constructed, and strategy transformation from passive inhibition of carbon adsorption to active separation of a carbon carrier is successfully realized. Compared with a traditional method which only tries to passivate the adsorption activity of carbon, the method has the advantages that gold-robbing carbon interfering with gold recovery is converted into a flotation carrier easy to separate through accurate reagent matching, and the problem that carbonaceous interferes with cyaniding gold extraction is fundamentally solved. The modified carbon agglomerates are subjected to efficient flotation separation due to the excellent hydrophobic characteristic, and the gold is enriched in the tailings due to the fact that the gold is not hydrophobized. According to the method, the gold recovery rate of follow-up cyanidation leaching is remarkably increased, the agent consumption is greatly reduced, and the important technical value of achieving technological process innovation through molecular-level collaborative design is shown.

A carbon sorbent for removing carbon dioxide from a gaseous material includes a surface composition including carbon, nitrogen, and oxygen. The nitrogen atoms at the surface of the carbon sorbent may be present in pyridone, pyrrole, and pyridine. The surface of the carbon sorbent may include lactone groups and pyrone groups. The carbon sorbent may have a bulk density greater than about 0.40 grams per cubic centimeter. The carbon sorbent may be formed using amino acids to provide the nitrogen for the carbon sorbent. In addition, the use of processing aids during the formation of the carbon sorbent facilitates the formation of a denser carbon sorbent. Related methods of forming the carbon sorbent and pellets of the carbon sorbent are also disclosed.

A carbon sorbent for removing carbon dioxide from a gaseous material includes a surface composition including carbon, nitrogen, and oxygen. The nitrogen atoms at the surface of the carbon sorbent may be present in pyridone, pyrrole, and pyridine. The surface of the carbon sorbent may include lactone groups and pyrone groups. The carbon sorbent may have a bulk density greater than about 0.40 grams per cubic centimeter and may exhibit a carbon dioxide capacity of at least 11.0 weight percent at 30° C. and 760 mmHg. The carbon sorbent may be formed using amino acids to provide the nitrogen for the carbon sorbent. In addition, the use of processing aids during the formation of the carbon sorbent facilitates the formation of a denser carbon sorbent. Related methods of forming the carbon sorbent and pellets of the carbon sorbent are also disclosed.

A carbon sorbent for removing carbon dioxide from a gaseous material includes a surface composition including carbon, nitrogen, and oxygen. The nitrogen atoms at the surface of the carbon sorbent may be present in pyridone, pyrrole, and pyridine. The surface of the carbon sorbent may include lactone groups and pyrone groups. The carbon sorbent may have a bulk density greater than about 0.40 grams per cubic centimeter. The carbon sorbent may be formed using amino acids to provide the nitrogen for the carbon sorbent. In addition, the use of processing aids during the formation of the carbon sorbent facilitates the formation of a denser carbon sorbent. Related methods of forming the carbon sorbent and pellets of the carbon sorbent are also disclosed.

The invention relates to the technical field of gasification slag drying, in particular to a gasification slag recovery system based on intelligent drying, which comprises a crushing module, a drying module, a flotation module, a data acquisition module and a control module. The crushing module crushes gasified slag to a preset particle size, the drying module heats and dries the crushed particles, and the flotation module realizes fine carbon separation through a microbubble mixing assembly and the like. The data acquisition module is used for acquiring the specific surface area of the dried gasified slag, the particle agglomeration diameter in the flotation liquid and the bubble uniformity. And the control module identifies an agglomeration reason according to data acquired by the data acquisition module. The method solves the problem that in the prior art, identification of gasification slag particulate matter agglomeration reasons is single, the drying temperature and the smashing rate of a system are adjusted through bubble uniformity, interference of particulate matter agglomeration in flotation liquid on fine carbon adsorption through microbubbles is reduced, the fine carbon separation efficiency and precision are improved, and the quality of fine carbon is improved. Therefore, the recycling rate of useful components in the gasified slag is improved.

The invention relates to a gold oxide ore carbon slurry cyaniding smelting extraction method which comprises the following steps: 1) pretreating ore pulp: adding lime milk into gold oxide ore powder, adjusting the pH value to be greater than 10.5 to obtain ore pulp, then adding a pretreating agent, and fully and uniformly mixing to obtain pretreated ore pulp; (2) synchronous cyaniding leaching and adsorption are conducted, specifically, the pretreated ore pulp is subjected to synchronous leaching and adsorption, in the process, the concentration of free cyanogen is controlled to be 0.04%-0.06%, the PH value is controlled to be larger than 10.5, the concentration of a carbon adsorbent is controlled to be 18-22 g / L, and a gold loading material is obtained; the gold loading material is desorbed till the gold concentration in a desorption solution is smaller than or equal to 0.2 mg / L, desorption is stopped, a pregnant solution is obtained and then electrolyzed, when the gold concentration is smaller than or equal to 0.2 mg / L, electrolysis is stopped, scraping is conducted, and gold mud is obtained, and (4) smelting and aftertreatment are conducted, the gold mud is smelted and subjected to aftertreatment, and gold is obtained.The process has the advantages of being small in cyanide consumption and the like.

The utility model belongs to the field of building materials and environmental protection, and particularly relates to an enhanced low-carbon concrete carbon capture device. The device comprises a carbon capture unit, a gas conveying unit and a control unit, wherein the carbon capture unit comprises a capture chamber and a partition plate, the partition plate is provided with adsorption holes, and the adsorption holes are filled with a carbon adsorption material; the gas conveying unit comprises a gas inlet pipeline, a gas outlet pipeline and a power pump; the air inlet pipeline is connected with the inlet end of the capturing chamber, the air outlet pipeline is connected with the outlet end of the capturing chamber, and the power pump is used for conveying air; the control unit comprises a sensor and a controller; the sensor is used for monitoring the gas concentration and temperature in the capturing chamber, and the controller is used for adjusting the running state of the power pump. The carbon capture efficiency is improved, and the utilization rate of an adsorption material is remarkably improved; and the operation cost is reduced, and the use and maintenance costs of alkaline substances are reduced.

The utility model relates to the technical field of attapulgite, in particular to an attapulgite carbon-adding adsorption forming device which comprises a heating tank, a tank cover is arranged at the top of the heating tank, the tank cover is connected with the heating tank through a plurality of fixing buckles, one side of the top of the tank cover penetrates through and is fixedly connected with a feeding groove, and the other side of the top of the tank cover is fixedly connected with the feeding groove. A driving motor is fixedly connected to the center of the top of the tank cover, a transmission shaft is fixedly connected to the output end of the driving motor, a pair of connecting shaft discs are arranged below the transmission shaft, a supporting shaft is fixedly connected between the two connecting shaft discs, and the connecting shaft disc located on the upper portion is fixedly connected with the bottom end of the transmission shaft; a plurality of stirring rods are arranged on the outer side of the connecting shaft disc at equal intervals, and the stirring rods are flexible in structure, so that the stirring rods can be detached and replaced after being damaged, the subsequent mixing effect cannot be affected, and convenience is provided for later maintenance work.

The utility model discloses a flue gas carbon capture device, which belongs to the technical field of energy, and adopts the technical scheme that the flue gas carbon capture device comprises a gas inlet pipe, the right side of the gas inlet pipe is fixedly connected with a capture pipe, the right side of the capture pipe is fixedly connected with a gas outlet pipe, and the bottom of the capture pipe is fixedly connected with a recovery pipe; the inner sides of the catching pipe and the recycling pipe are movably connected with a catching and recycling mechanism, the inner side of the gas inlet pipe is movably connected with a pretreatment mechanism, traditional landing equipment can be abandoned, the flue gas treatment process is shortened, a pipeline is divided into the gas inlet pipe, the catching pipe and the gas outlet pipe, and the recycling pipe, a matched through groove, a supporting rotating rod and other structures are arranged at the bottom of the catching pipe; integration of smoke carbon capture and recovery is achieved, a honeycomb carbon adsorption plate directly completes smoke carbon adsorption in a capture pipe, after adsorption is saturated, a servo motor drives a supporting rotating rod to rotate, the supporting rotating rod is transferred into a recovery pipe, smoke carbon is rapidly released and recovered through a direct heating lamp and a guide fan, and meanwhile the activity of the honeycomb carbon is recovered.

The utility model relates to the technical field of detection devices, and provides a high-efficiency carbon adsorption microcapsule detection device which comprises a magnetic stirrer and a supporting rod fixedly connected to the top of the magnetic stirrer. According to the utility model, the locking bolt is rotated by hand to release the abutting state between the locking bolt and the supporting rod, so that the movable ring can slide downwards along the outer surface of the supporting rod, and the connecting rod, the connecting plate, the L-shaped bracket, the leak hole placing barrel and the like are synchronously driven to move downwards, so that the leak hole placing barrel is immersed into an adsorbate solution of a container; the locking bolt is rotated by hand to abut against the supporting rod to limit the movable ring, so that the situation that the microcapsules float on the surface of the adsorbate solution due to different densities, sizes and shapes can be prevented, and the microcapsules are in full contact with the adsorbate solution; further, the accuracy of the adsorption result of the adsorbate solution on the microcapsule carbon is improved.

The invention discloses a method and device for detecting carbon and nitrogen elements in fresh soil. The method comprises the steps of pipeline air exhaust, water quantification, low-temperature cracking, medium-temperature oxidation, high-temperature combustion and the like. The device comprises a combustion furnace, a heat exchange tube, an electronic condenser, a dehalogenation device, a flow divider, a collector, a reduction furnace, a carbon adsorption column and a TCD detector. The electronic condenser is used for cooling the vaporized atmosphere in the fresh soil, real-time high-precision quantitative analysis is carried out on the water content, and the content of carbon and nitrogen elements in the fresh soil is converted into the content of carbon and nitrogen in the dry soil through the water content of the soil; the contents of carbon or nitrogen in various forms are distinguished by utilizing staged combustion detection for the first time, the contents of main nutrient elements of carbon and nitrogen in the soil can be rapidly and accurately determined in a field edge site, and compared with determination after air drying of a soil sample, the detection time is greatly saved; the determination result of the method can guide field fertilization, provides a scientific basis for agricultural production, and serves modern agricultural development.

The invention relates to the technical field of water treatment, in particular to a composite treating agent for municipal sewage and a preparation method thereof.The composite treating agent is prepared by selecting industrial solid waste boric sludge, fly ash and the like as raw materials, taking biomass raw material epoxidized soybean oil as a binder, taking biomass raw material starch and plant-based porous carbon as adsorbents, mixing the raw materials with sodium silicate and water for granulation, and preparing the composite treating agent. The baking-free composite treating agent integrating multiple functions of sulfur autotrophic denitrification nitrogen removal, phosphorus removal, heavy metal chelating, porous carbon adsorption and the like is prepared, and when the baking-free composite treating agent is applied to urban sewage treatment, synchronous low-carbon and high-efficiency removal of various pollutants such as nitrogen, phosphorus and heavy metal can be achieved; after being granulated and formed, the composite treatment agent can be used as a filler of a biological filter to support the growth of sulfur autotrophic denitrifying bacteria, and can also be directly added into a pretreatment unit or an advanced treatment unit of a sewage treatment system.

High purity carbon sorbent monoliths, particularly effective for the removal of trace-contaminants such as ammonia, formaldehyde, and methyl mercaptan from a gas flow, are fabricated by 3D-printing polymer monoliths, pre-oxidizing them in a flow of air at a temperature below the melting point of the polymer precursor, carbonizing them, and subsequently activating them to a weight loss of about 20 percent. The pre-oxidation step effectively prevents polymer-monolith swelling and melting during carbonization.

The invention relates to the technical field of corrosion resistance of CCUS well cementation cement sheaths, in particular to a tertiary amine modified CCUS corrosion-resistant admixture as well as a preparation method and application thereof. And uniformly mixing the epoxy resin emulsion with the tertiary amine modified curing agent for reaction to obtain the tertiary amine modified CCUS corrosion-resistant admixture. The tertiary amine modified CCUS corrosion-resistant cement admixture system is prepared from the tertiary amine modified CCUS corrosion-resistant admixture, a fluid loss agent, a coagulation accelerator and a defoaming agent. The CCUS corrosion resistance of a cement matrix is improved by adding a tertiary amine modified CCUS corrosion-resistant cement admixture system into oil well cement. The tertiary amine modified CCUS corrosion-resistant cement system provided by the invention has excellent corrosion resistance, a composite corrosion-resistant structure is constructed through cooperation of a polymer film structure and tertiary amine group carbon adsorption, and the corrosion resistance of a cement matrix is remarkably improved.

This utility model discloses an ammonia removal device, including an ammonia removal cylinder, a water washing mechanism, and an activated carbon adsorber. The ammonia removal cylinder includes a cylinder body, a sleeve, and multiple air guide components. The sleeve is fixedly connected to the cylinder body and passes through the cylinder body, forming a washing chamber between the sleeve and the cylinder body. The multiple air guide components are circumferentially installed on the sleeve and can guide the airflow in the washing chamber into the sleeve. The cylinder body has an air inlet end communicating with the washing chamber and an exhaust end communicating with the top of the sleeve. The water washing mechanism is installed in the washing chamber and is used to wash the airflow entering the washing chamber through the air inlet end. The activated carbon adsorber is installed in the sleeve and is used to filter the airflow output by the multiple air guide components. This invention solves the problem in the prior art where ammonia removal devices purify waste gas by spraying ammonia removal liquid, and some ammonia in the waste gas is not completely absorbed.

A gas separation device generally includes a gas separation chamber, at least one cooling plate disposed in the gas separation chamber, and a carbon adsorber disposed in an adsorbed gas capture chamber. The gas separation chamber has a rim that defines a first interior environment when placed on top of the weathered layer. A cooling plate is disposed in the gas separation chamber, where the cooling plate is maintained at a first temperature higher than 5 DEG K, the first temperature being a condensation temperature at which the higher temperature condensed gas condenses. The adsorptive gas capture chamber defines a second interior environment in communication with the first interior environment. The carbon adsorber is disposed in the second internal environment and maintained at a second temperature below 3 DEG K. The carbon adsorber is configured to capture cryogenic condensed gas.

The application provides a device and a method for preparing trichlorosilane, and the device comprises a trichlorosilane synthesis system, a dry dust removal system, a wet dust removal system, a heavy component removal and purification system and a slag slurry treatment system; the trichlorosilane synthesis system comprises a trichlorosilane reactor; the dry dust removal system comprises a cyclone separator; the wet dust removal system comprises a spray tower, a reboiler, a heat exchanger and a first condenser; and the heavy component removal and purification system comprises a heavy component removal tower and a carbon adsorption tower. The device combines the pneumatic conveying of silicon powder in the entire polysilicon industry, and combines the energy-saving technology of condensing mixed gas as the liquid phase of spray washing by using the heat exchanger, the energy-saving means of bidirectional extraction of trichlorosilane and tetrachlorosilane components, and the technology of slag slurry concentration and recovery, so that the effective resource integration of the entire system is achieved, the technical effects of low energy consumption and cyclic reuse are fully realized, and a high-purity trichlorosilane production system which can run independently and self-compensate is created.

The invention belongs to the technical field of gas separation and purification, and particularly relates to a preparation method of a coal carbolic oil-based adsorption material and a coal carbolic oil-based carbon adsorption material. The preparation method comprises the following steps: extracting phenolic substances in coal carbolic oil serving as a raw material by using a KOH solution, then adding aldehyde substances to polymerize, and then carbonizing a polymer at high temperature to prepare the porous adsorption material. According to the method, phenolic substances can be obtained without acid liquid replacement, generation of waste acid and waste salt is reduced, meanwhile, KOH can serve as a basic catalyst to catalyze polymerization of the phenolic substances and aldehyde substances and can also serve as a pore forming agent, and therefore the porous adsorption material generated after high-temperature carbonization is moderate in pore and concentrated in pore distribution. According to the method disclosed by the invention, carbolic oil extraction, polymer synthesis and high-temperature carbonization are coupled into a whole, so that the use of an alkaline agent is effectively reduced, and the prepared adsorption material is high in methane selectivity and large in adsorption capacity.

The utility model relates to the technical field of air purification, in particular to an acetaldehyde removal skeleton filter material non-woven fabric, which comprises a short fiber skeleton layer, a non-woven fabric layer, a non-woven fabric layer and a non-woven fabric layer, the carbon adsorption layer comprises activated carbon particles, and the activated carbon particles are uniformly dispersed in a flexible matrix and attached to the short fiber skeleton layer; a formaldehyde removal agent is added into the formaldehyde removal additive layer, and a formaldehyde removal agent solution is uniformly loaded on the surfaces and internal pores of the short fiber skeleton layer and the carbon adsorption layer through a spraying process; and the protective filter layer is prepared from fine denier polypropylene fibers through a melt-blowing process, covers the outermost layer and is used for intercepting small-particle floating dust. In conclusion, efficient filtration and formaldehyde removal can be achieved in an automobile air conditioner and a fresh air system, the air quality is improved, and the health of a user is guaranteed.

A mesoporous carbon sorbent for removal of carbon dioxide from a gaseous material includes a BJH average pore width greater than about 3 nm, and a selectivity of carbon dioxide to nitrogen greater than about 20.00 at about 30° C., a partial pressure of carbon dioxide of about 114 mmHg, and a partial pressure of nitrogen of about 646 mmHg. Related mesoporous carbon sorbents, and methods of forming the carbon sorbents are also disclosure.

The application provides a fish waste full-component high-value utilization method, which comprises the following steps: mixing fish waste and wet desulfurization wastewater of a thermal power plant according to a certain mass ratio, putting the mixture into a reaction kettle, stirring and heating, keeping warm for a certain time, cooling to room temperature, filtering and separating, obtaining a carbon-based precursor and a liquid product; putting a certain amount of the carbon-based precursor into a coffee acid-added distilled water mixed solution, stirring at room temperature for a certain time, putting into a reaction kettle, closing the kettle body, stirring and heating again, keeping warm for a certain time, cooling to room temperature after the reaction is completed, filtering, separating, drying, obtaining a target carbon adsorption material and a liquid product; mixing all the liquid products, putting into a reactor, adding Al2O3, SiO2 and methanol, closing the kettle body, introducing CO2 to a certain pressure, opening a stirring device, heating and reacting, separating after the reaction is completed, and obtaining a liquid oil. The fish waste full-component high-value utilization is realized by using multistage hydrothermal treatment.

The utility model discloses a wastewater treatment device based on charcoal-based filter bed treatment. The wastewater treatment device comprises a water inlet, a box body, an aeration tank, a charcoal filter tank I, a charcoal filter tank II, a filter plate replacement mechanism, a filter plate mechanism, a water outlet I and a water outlet II, the water inlet is formed in the front end of the box body, the aeration tank, the carbon filter tank I and the carbon filter tank II are sequentially arranged in the box body from front to back, the carbon filter tank I and the carbon filter tank II are arranged, and the two groups of carbon filter tanks alternately work when the carbon filter plates are replaced, so that the adsorption and filtration of carbon are not influenced, and the adsorption and filtration efficiency is improved. The carbon filter plate is automatically replaced through the filter plate replacement mechanism; a carbon filter plate of the filter plate mechanism adsorbs and filters wastewater, and the locking mechanism locks the carbon filter plate in a filter plate bracket, so that the stability of the carbon filter plate in the adsorption and filtration process is ensured; the filter plate replacement mechanism adjusts the position of the trigger mechanism, and the trigger mechanism controls the locking mechanism to be opened and closed, so that the replacement of the carbon filter plate is completed.

The invention discloses calcium oxide / water foamed porous ceramic as well as a preparation method and application thereof. Belongs to the field of porous ceramics. The invention aims to solve the problems of low adsorption capacity, poor thermal stability and difficult regeneration of the existing carbon capture material and the problems of high cost, complex process and difficulty in considering high performance of the traditional porous ceramic preparation method. The porous ceramic disclosed by the invention is a three-dimensional communicated pore structure framework formed by taking silicon carbide (SiC) and aluminum oxide (Al2O3) as matrixes, wherein the mass ratio of the SiC to the Al2O3 is (1.5-1.2): 1; the carbon absorption active layer is distributed on the hole wall of the framework; the carbon absorption active layer is composed of residual calcium oxide (CaO) and loaded nano magnesium oxide (MgO), and the porous ceramic has high porosity, a three-dimensional communicated pore structure, good mechanical properties and efficient CO2 adsorption capacity, and is suitable for the fields of industrial tail gas carbon capture, building heat insulation and the like.

The utility model discloses a household garbage leachate collecting and treating device, which relates to the field of household garbage leachate treatment and comprises a treatment box and a motor, the motor is fixed on the rear end face of the treatment box, a rotating shaft is fixed at the output end of the motor, and the rotating shaft is connected into the treatment box through a bearing. According to the household garbage leachate collecting and treating device, a rotary filtering mechanism is adopted, the contact position of a filter screen and leachate can be changed in real time, the filter screen is prevented from being blocked, the filtering effect is not affected, impurities bonded on the filter screen can be scraped away through cooperation with the effect of a scraper, and then through cooperation with the effect of a collecting hopper, a discharging pipe and a collecting box, the filtering effect is improved. According to the device, impurities can be automatically discharged and collected, a filter screen does not need to be manually cleaned, the use convenience of the device is improved, a linkage adsorption mechanism is matched, a movable carbon adsorption plate can move up and down in order, percolate can make contact with the movable carbon adsorption plate for multiple times, purification is achieved, and the purification effect is guaranteed.

The invention discloses a semi-coke wastewater-based phenolic resin porous carbon adsorption material and a preparation method thereof, high-pollution semi-coke wastewater is used as a phenol source, waste potato residues are used as a modifier, and the semi-coke wastewater is subjected to composite flocculation, macroporous adsorption resin adsorption elution and reduced pressure distillation concentration to obtain a phenol-rich solution; carrying out alkaline hydrolysis-oxidation-silane coupling agent graded modification on the potato residues; the preparation method comprises the following steps: polymerizing a phenol-rich solution with furfural, compounding with graded modified potato residues, carrying out in-situ crosslinking with urotropine, carbonizing, and carrying out ZnCl2-citric acid composite activation to finally prepare the semi-coke wastewater-based phenolic resin porous carbon adsorption material. According to the method, the potato residues and the semi-coke wastewater are synergistically recycled, the material is endowed with high specific surface area, a multi-stage pore channel structure and rich surface functional groups through compound modification, graded modification and graded carbonization, the potato residues are completely recycled, the process is free of secondary pollution, the cost is reduced by 30%-40%, and the method can be widely applied to the fields of industrial wastewater treatment, atmospheric pollutant adsorption and the like. The environment-friendly and economic values are realized.

The invention discloses a method and a system for fine utilization of waste silicon powder of a chassis of a reduction furnace, and the method comprises the following steps: adding a certain proportion of polyphosphazene powder into the waste silicon powder of the chassis of the reduction furnace, fully mixing, and uniformly covering the surface of the waste silicon powder of the chassis of the reduction furnace with the polyphosphazene powder to obtain mixed powder; carrying out ashing treatment on the mixed powder under a high-temperature condition, and cooling to obtain carbonized blocks; the carbonized blocks are ground and screened, and oversize powder and undersize powder are obtained; and loading an active substance on the surface of the oversize powder to prepare a silicon-carbon catalyst, soaking the undersize powder in a solvent, cleaning, and drying to prepare the silicon-carbon adsorbent. According to the method, spontaneous combustion prevention and refined utilization of the waste silicon powder of the reduction furnace chassis can be achieved, the safety risk in the polycrystalline silicon production process is reduced, the waste silicon powder of the reduction furnace chassis is converted into a material with certain value and application, resource waste is avoided, cyclic utilization and sustainable development of resources are achieved, and the resource utilization efficiency and economic benefits are improved; and the influence on the environment is reduced.

The utility model provides an exhaust system for a laboratory, which comprises a suction unit, a waste gas treatment unit and a waste gas discharge unit, and the suction unit is used for capturing waste gas; the waste gas treatment unit comprises a dust removal mechanism, a spray tower, a drying tower and a carbon adsorption box which are connected in sequence, and the dust removal mechanism is connected with the suction unit; the waste gas discharge unit is connected with the carbon adsorption box and is used for discharging waste gas to the outside; the suction unit comprises a first pipeline, a second pipeline and a main pipeline, the first pipeline is used for being connected with an exhaust outlet of the synthesis experiment cabinet, the second pipeline is connected with a fixed exhaust hood and a universal exhaust hood which are located above the detection experiment operation table, the air inlet end of the main pipeline is connected with the first pipeline and the second pipeline, and the air outlet end of the main pipeline is connected with the dust removal mechanism. The exhaust system for the laboratory, provided by the utility model, can effectively remove pollutants such as smoke dust, flammable and explosive substances, organic non-methane hydrocarbons and the like in waste gas, so that the possibility of safety accidents is reduced, and the safety of the surrounding environment and personnel is guaranteed.

The present invention relates to the technical field of adsorption of substituted benzene poisons, and discloses a novel cyclic chlorine disinfection by-product removal method based on a polyacrylic acid-coated N-doped MOFs-derived carbon adsorbent. The MOFs-derived carbon material is a polyacrylic acid-coated N-doped MOFs-derived carbon material, and the adsorption rate of substituted benzene substances is as high as more than 90%. The N-doped MOFs-derived carbon is obtained by high-temperature calcination of ZIF-8. High-temperature carbonization is used to cause the organic skeleton in the precursor MOF to collapse and the metal center to gasify, ultimately producing a hierarchical pore structure and a high pore volume. The micropores provide adsorption sites for the target, and the mesopores can effectively enhance the mass transfer of the target in the material. The addition of N atoms can flexibly adjust the pore size, affect the dielectric properties of the MOFs-derived carbon, and provide more adsorption sites, thereby improving the adsorption capacity of the target, and the adsorption rate for substituted benzene substances is as high as more than 90%.

This invention belongs to the technical field of water pollution control and solid waste resource utilization, specifically relating to a method for preparing porous carbon adsorbent materials and their application. The method includes the following steps: S1, pretreating carbon-containing biomass solid waste and calcium-containing industrial solid waste respectively to obtain pretreated biomass material and pretreated calcium-containing solid waste; S2, immersing the pretreated biomass material in an iron-based modifier system for modification treatment to obtain iron-based modified biomass material; S3, mixing the iron-based modified biomass material and the pretreated calcium-containing solid waste evenly to obtain a catalytic precursor; S4, subjecting the catalytic precursor to programmed temperature co-pyrolysis treatment, and obtaining a primary pyrolysis product after cooling; S5, sequentially subjecting the primary pyrolysis product to water washing, solid-liquid separation, drying, and pulverization to obtain the porous carbon adsorbent material. The raw materials of this invention are widely available and inexpensive, the preparation process is simple and can be mass-produced, and the overall cost is significantly lower than that of ordinary commercial activated carbon.