236 results about "Acid washing" patented technology

The invention discloses a doping purification process of high-purity quartz sand, and relates to the technical field of quartz sand purification, and the doping purification process comprises the following steps: crushing quartz sand, putting the crushed quartz sand into a microwave reactor, and introducing ozone; immersing the quartz sand subjected to microwave treatment into bacterial liquid, stirring or oscillating, and then separating; the bacterial liquid comprises acidophilic thiobacillus thiooxidans and silicate decomposition bacteria in a mass ratio of 1: (3-10), the concentration of the bacterial liquid is 106-108 CFU / mL, and the pH value is 1.5-3.0; the separated quartz sand is sequentially subjected to high-voltage pulsed magnetic field action and nano bubble flotation; the quartz sand subjected to nano bubble flotation is subjected to acid pickling with a composite acid solution; carrying out pyrolysis film removal on the quartz sand subjected to acid pickling; removing membrane impurities from the quartz sand subjected to pyrolysis membrane removal through a subcritical water repairing process, and filtering, washing and drying; according to the method, micron-sized impurities in the quartz sand can be efficiently separated, impurities of different sizes in the quartz sand are removed step by step, the impurity removal rate is high, the removal effect is good, and the process cost is reduced.

The utility model belongs to the technical field of quartz sand pickling equipment, and particularly relates to a quartz sand washing barrel which is arranged below a quartz sand pickling barrel and at least comprises a barrel body, the top of the barrel body is open, a working platform is arranged on the top or the upper portion of the barrel body, a circle of overflow groove is arranged on the outer wall of the top of the barrel body, and the top face of the overflow groove is slightly lower than the top face of the barrel body. The bottom of the barrel body is provided with a plurality of water nozzles, the water nozzles are connected with a water inlet pipe, water in the water inlet pipe enters the quartz sand washing barrel through the water nozzles, and the bottom of the barrel body is also provided with a water outlet and a sand outlet connected with a sand pump; and an outlet of a sand discharge port of the quartz sand pickling barrel or an outlet of the sand separation box connected with the outlet of the sand discharge port of the quartz sand pickling barrel is fixed on the edge of the top of the quartz sand washing barrel and is close to the working platform. According to the quartz sand washing barrel, the top of the barrel body is open, the quartz sand washing condition can be directly checked at any time in the washing process, and the water inlets are evenly distributed in the bottom of the barrel body.

The invention discloses a construction method and application of a mixed-dimension attapulgite clay-based porous separation membrane, firstly, mixed-dimension attapulgite clay acid etching powder is added into a saponin plant extracting solution to obtain a suspension, then the suspension is mixed with a sodium alginate / glycerol aqueous solution, a Pickering foam template method is adopted to obtain a membrane forming solution, and the membrane forming solution is dried to obtain the mixed-dimension attapulgite clay-based porous separation membrane. And carrying out film casting, calcium crosslinking and carboxylation treatment to obtain the porous separation membrane. On the basis of the rod / sheet mixed dimension structure advantage of clay minerals and the synergistic stabilization effect of plant derivatives, the interfacial film strength, functional group spatial arrangement and network structure are efficiently regulated and controlled, the separation film with a multi-stage communicating pore structure and excellent mechanical performance and separation efficiency is constructed in a green mode, and the separation efficiency is improved by combining film layer stacking and acid pickling enrichment. A high-efficiency uranium separation / enrichment method is developed, and an innovative solution is provided for uranium pollution prevention and control and resource enrichment by a membrane separation technology.

The utility model belongs to the technical field of coke oven gas purification, and particularly relates to an environment-friendly and efficient oxidation process desulfurization regeneration tail gas treatment system, which is characterized in that the system is a multi-stage step-by-step washing system and comprises an alkaline washing tower, an acid washing tower and a water washing tower, primary washing tail gas at the top of the alkaline washing tower is connected with the bottom of the pickling tower through a pipeline, secondary washing tail gas at the top of the pickling tower is connected with the bottom of the water washing tower through a pipeline, a bleeder is arranged at the top of the water washing tower, the bottom of the bleeder is isolated from the interior of the water washing tower through a partition plate, and an overpressure return pipe is arranged between an outlet of the tail gas fan and the bleeder and provided with a switch valve. And a pressure gauge is arranged on an outlet pipeline of the tail gas fan and is in interlocking control with the switching valve. The device has the beneficial effects that the current environmental protection standard can be met, ammonia in tail gas can be recycled, no sewage is discharged, and the device has the characteristics of environmental protection, high efficiency, stable and reliable process and easiness in implementation and popularization.

The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment process and device.The waste gas treatment device comprises a waste gas filter cartridge, an acid washing tower, an alkaline washing tower, an ultraviolet decomposition device and an adsorption tower, the ultraviolet decomposition device and the adsorption tower are arranged in parallel, waste gas is filtered through the waste gas filter cartridge, then absorbed through the acid washing tower and the alkaline washing tower and then subjected to ultraviolet photolysis oxidation, and redundant ozone is absorbed; the process is high in treatment efficiency, low in operation cost and free of secondary pollution to the environment, in addition, the waste gas filter cartridge cleans the filter plate through cooperation of the cleaning assembly and the knocking block, the filter plate is prevented from being blocked, the waste gas treatment efficiency is further improved, and the waste gas treatment cost is reduced. A plurality of partition plates are driven to rotate when a support frame in the ultraviolet decomposition device rotates, and the waste gas in the shell is further stirred, so that the waste gas is in full contact with ultraviolet light, and the ultraviolet photolysis efficiency of the waste gas is further improved.

The invention discloses waterproof and weather-resistant exterior wall paint and a preparation method, and particularly relates to the technical field of building coatings, the core of the waterproof and weather-resistant exterior wall paint is that a geopolymer is used as a matrix, and a bionic protection technology and an intelligent color development technology are combined to realize excellent waterproofness, weather resistance and color stability. The exterior wall paint mainly comprises a geopolymer matrix, a bionic protection system, a color development system and a functional auxiliary agent. Wherein the geopolymer matrix is composed of activated fly ash, acid-washed calcined red mud and other materials, a compact three-dimensional network structure is formed, and the waterproof performance and weather resistance of the coating are remarkably improved; the bionic protection system realizes the super-hydrophobic characteristic through gradient coating of diatomite and other materials, and the self-cleaning efficiency is remarkably improved. The coating is prepared from natural inorganic mineral raw materials, is safe, harmless, pollution-free, green and environment-friendly, is suitable for high-cold, high-temperature, high-humidity, strong-ultraviolet and severe-pollution areas, and is cold-resistant, heat-resistant, crack-resistant, frost-resistant, waterproof, moisture-proof, acid-resistant, alkali-resistant, washing-resistant and stain-resistant.

The invention discloses a weather-resistant heat-insulation waterproof coating for an outer wall and a preparation method of the weather-resistant heat-insulation waterproof coating. The waterproof coating comprises the following components in parts by weight: 27-35 parts of modified acrylate polymer emulsion, 35-50 parts of composite filler, 5-10 parts of a curing system, 4-8 parts of a coalescing agent, 0.1-0.5 part of a defoaming agent, 0.3-0.8 part of a flatting agent, 0.2-0.6 part of a mildew preventive, 0.5-1.0 part of a thickening agent and 1-5 parts of a pH regulator, the modified acrylate polymer emulsion is prepared by carrying out pretreatment and silanization modification on cardanol and then carrying out monomer pre-emulsification and free radical polymerization. According to the waterproof coating provided by the invention, a Si-O-C network and a hindered amine free radical capture system are introduced, so that the weather resistance is improved; fluoride-nano silicon dioxide is used for constructing a roughness-low surface energy synergistic waterproof interface; acid-washed fly ash floating beads, silicon dioxide aerogel and expanded perlite filler are compounded to form multiple heat conduction scattering paths so as to realize cross-scale porous filler heat preservation; the waterproof coating can serve in complex environments with large temperature difference fluctuation, acid rain and the like.

The utility model relates to a fluorine resource recovery system for fluorine-containing waste water, which can be used for carrying out scientific classification and comprehensive treatment on high-purity quartz sand pickling waste liquid and rinsing waste water by arranging a pickling fluorine-containing waste water treatment module and a rinsing fluorine-containing waste water treatment module. According to the treatment mode, near-zero emission of the dangerous waste liquid or solid waste is achieved, the outsourcing treatment cost is effectively reduced, fluorine resources in the waste liquid or waste water can be efficiently recycled, high-purity sodium fluosilicate, calcium fluoride and other high-added-value products are produced, and extra economic benefits are brought to enterprises.

The invention discloses an automotive interior metal part spraying process based on a high-adhesion water-based paint, which comprises the following steps: firstly, carrying out alkali washing and acid washing treatment on a metal part, so that the metal surface is clean and micro roughness is formed; then carrying out chemical conversion treatment by adopting a water-based conversion solution containing amino silane and epoxy silane to form a compact and uniform conversion film on the metal surface; then water-based prime coat is sprayed on the surface of the conversion film, the thickness of a dry film is controlled to be 3-8 microns, and good substrate binding force is provided after heating; the preparation method comprises the following steps: firstly, spraying a water-based finishing coat taking hydroxy acrylic resin as a main body, adding a blocked isocyanate cross-linking agent, uniformly coating through an electrostatic spraying process, and finally curing under a sectional heating condition to obtain a coating with excellent durability; according to the present invention, the adhesion between the water-based paint and the metal base material is effectively improved, the durability of the paint film in the damp and hot salt mist environment is improved, the use of the organic solvent is reduced, and the advantages of environmental protection, low VOC emission and suitableness for industrial large-scale production are provided.

The invention discloses a CO2 adsorption material and a preparation method thereof.The method comprises the steps that 1, a coal-based raw material and an activating agent are mixed and ground to be uniform, and a mixture is obtained; 2) pre-oxidizing the mixture in an oxygen-containing atmosphere to obtain a pre-oxidized sample; 3) carbonizing and activating the pre-oxidized sample in a protective atmosphere, and then performing secondary activation in a CO2 atmosphere to obtain an activated sample; 4) washing the activated sample in an acid solution, washing in an aqueous solution, and drying to obtain an acid-washed sample; and 5) carrying out hot alkali treatment on the acid-washed sample in a high-temperature alkali solution, washing the sample subjected to hot alkali treatment with water, and drying to obtain the adsorption material. The adsorption material prepared by the method has the advantages of large micropore specific surface area, high CO2 adsorption capacity, high CO2 / N2 selectivity and the like, and the preparation process is simple, low in cost and very suitable for large-scale production and application.

The invention relates to a preparation and construction process of a cast-in-situ solid waste-based UHPC-foamed ceramic composite board, which is characterized in that low-grade potassium feldspar tailings are subjected to acid pickling activation and plasma-assisted microwave treatment, and are combined with high-efficiency compounding of solid waste-based raw materials, so that the matrix activity and the interface bonding force are remarkably improved; a quaternary hybrid toughening system is introduced, so that the mechanical property and the crack resistance durability of the material are comprehensively improved. A green preparation process is adopted for the foamed ceramic, the pore structure is optimized through plasma pretreatment and gradient temperature control sintering, high heat preservation and structural stability are both considered, energy consumption is reduced, and meanwhile the collapse risk of a traditional process is avoided. The interlayer bonding strength and thickness uniformity of the cast-in-place solid waste-based UHPC-foamed ceramic composite board are ensured, and the problems of hollowing, stripping and the like are solved. According to the technical scheme, high-value utilization of solid waste is taken as a core, environmental protection and economical efficiency are achieved, a traditional organic heat preservation system can be replaced, a high-strength, durable and integrated solution is provided for wall heat preservation buildings, and upgrading of the green building material industry is promoted.

The application provides a quartz sand acid washing waste liquid resource treatment method, and belongs to the field of industrial waste water treatment, and comprises the following steps: adding magnetic composite seeds to the quartz sand acid washing waste liquid, and performing magnetic separation after stirring treatment; adding soluble potassium salt to the treated waste liquid to recover potassium fluosilicate; treating the filtrate through diffusion dialysis to obtain recovered acid and dialysis residual liquid; the diffusion dialysis treatment adopts an asymmetric membrane, the asymmetric membrane has a physical gradient of one side being a dense structure and the other side being a loose structure, and the dense structure side is in contact with the waste liquid; and adding calcium oxide or calcium hydroxide to the dialysis residual liquid for deep treatment and calcium recovery. The application provides a quartz sand acid washing waste liquid resource treatment method which is low in treatment cost, high in resource recovery rate and friendly to the environment, and realizes the differentiated resource recovery of the quartz sand acid washing waste liquid.

The invention belongs to the technical field of talc, and provides a method for detecting fluorescent substances in talc raw ore, which comprises the following steps: S1, carrying out ball milling on the talc raw ore in a ball mill, sieving to obtain sieved powder, and adding deionized water into the sieved powder to obtain slurry; s2, adding the slurry into the mixture to enable the pH value of the slurry to be 5, stirring, and standing in a water bath for 2-3 hours to obtain a first precipitate; s3, adding a thiourea-ascorbic acid solution into the first precipitate to obtain a second precipitate; and S4, carrying out secondary ball milling on the second precipitate, and spreading the second precipitate in an enamel plate to detect whether the talc raw ore contains the fluorescent substances or not. The hydrochloric acid can dissolve quartz and mica to avoid generation of background fluorescence or quenching effect, and the nonionic surfactant polyethylene glycol can be adsorbed on the surface of the mineral to reduce interfacial tension, so that the hydrochloric acid is easier to infiltrate tiny pores, the pit defect caused by local over-corrosion is reduced, the pickling uniformity is improved, and the detection sensitivity is improved.

This invention relates to the field of quartz sand purification technology and discloses an energy-saving and environmentally friendly quartz acid washing and purification device, comprising: an acid washing tower, an annular nozzle assembly, multiple directional ultrasonic transducers, and a solid-liquid separation component. An acid washing space is formed within the acid washing tower; a feed channel is provided at the top of the acid washing tower, connecting the external environment and the acid washing space; the annular nozzle assembly includes a liquid delivery ring and multiple nozzles; the liquid delivery ring is located in the acid washing tower and extends circumferentially along the tower; directional ultrasonic transducers are installed on the liquid delivery ring, with their ultrasonic radiation direction facing the axis of the acid washing tower; the multiple nozzles and multiple directional ultrasonic transducers are distributed at intervals along the circumference of the liquid delivery ring; the solid-liquid separation component includes a conveying mechanism, a collection tank, and a storage tank; the conveying mechanism is connected to the bottom of the acid washing tower via a discharge pipe; the storage tank is connected to the conveying end of the conveying mechanism. This achieves continuous acid washing.

The application discloses a waterproof coating for outer wall weather resistance, heat insulation and heat preservation and a preparation method thereof. The waterproof coating comprises the following components in parts by weight: modified acrylate polymer emulsion 27-35 parts, composite filler 35-50 parts, curing system 5-10 parts, film forming aid 4-8 parts, defoaming agent 0.1-0.5 parts, leveling agent 0.3-0.8 parts, mildew-proof agent 0.2-0.6 parts, thickening agent 0.5-1.0 parts and pH regulator 1-5 parts. The modified acrylate polymer emulsion is prepared by pretreating and silanization modifying cardanol, monomer pre-emulsification and free radical polymerization. The waterproof coating provided by the application introduces Si-O-C network and hindered amine free radical capture system to improve weather resistance; fluorine compound-nano silicon dioxide constructs roughness-low surface energy synergistic waterproof interface; acid washing fly ash floating beads, silica aerogel and expanded perlite filler are compounded to form multiple heat conduction scattering paths to realize cross-scale porous filler heat preservation; and the waterproof coating can serve in complex environments such as large temperature difference fluctuation and acid rain.

This invention discloses a selective roughening method for ceramic copper-clad laminates, comprising the following preparation steps: S1 printing an active solder layer between ceramic and copper foil; S2 preparing the ceramic copper-clad laminate; S3 etching copper onto the sintered ceramic copper-clad laminate; S4 removing unwanted solder layers; S5 cleaning, roughening, cleaning, acid washing, cleaning, immersion, and drying the patterned ceramic copper-clad laminate according to the following process, and filling it with nano-silicon and organosilane; S6 printing a thermosetting wet film to expose the area to be surface treated; S7 removing the surface roughening structure; S8 finally, subjecting the ceramic copper-clad laminate to nickel plating, chemical silvering, and then stripping to form the final structure. Compared with the prior art, this invention has the following beneficial effects: effectively avoiding the problem of solder voids caused by surface roughening pits, good surface weldability, and the concave structure of the welding area effectively prevents solder overflow during the welding process and reduces micropores in the chemical silver plating layer.

The invention provides a modified porous carbon composite material and a preparation method thereof, and belongs to the field of carbon materials. The method comprises the following steps: adding water-soluble resin and a foaming agent into a zinc chloride aqueous solution, and then carrying out spray drying to obtain a precursor material; dispersing the precursor material in an organic acid solution, adding a silane coupling agent, and then performing spray drying to obtain an intermediate material; carrying out pre-carbonization treatment on the intermediate material to obtain a pre-carbonized material; activating the pre-carbonized material in a carbon dioxide atmosphere to obtain an activated material; pickling the activated material to obtain a pickled material; the acid pickling material is subjected to reduction treatment, and a reduction material is obtained; and crushing the reduction material to obtain the modified porous carbon composite material. According to the novel porous carbon preparation method, high pore volume, proper pore diameter, low expansion, high first efficiency and low cost can be synergistically considered, so that the application requirements of a high-performance porous carbon negative electrode material are met.

The application discloses a sidetracking horizontal well large-diameter open-hole filling and acid washing integrated pipe column and a running method thereof. The pipe column comprises an outer pipe column and an inner pipe column, the inner pipe column is arranged in the outer pipe column, and a casing is arranged outside the outer pipe column. The outer pipe column comprises, from top to bottom, a locking device, an outer channel, a releasing device, a fishing device, a slip, a rubber sleeve, a reverse washing device, a filling outer tool, a backflow prevention device, an open-hole screen pipe and an acid washing outer sealing device. The inner pipe column comprises, from top to bottom, an inner channel, a filling inner tool, a check valve, a jetting pipe, an acid washing inner sealing device, a jet tool, a ball catching device and a bottom liquid flow port. The running method comprises the following steps: drilling fluid injection, pipe releasing, normal mud replacement, tubing pressure test, opening of the locking device, filling, reverse well washing without moving the pipe column, normal rotation releasing, segmented acid washing construction, reverse well washing until the outlet is clean and pipe column lifting. The application has the advantages of short construction period, effective prevention of well wall collapse, short construction period, high safety, and good construction effect.

The invention discloses an electric power oil washing device and an electric power oil purification treatment system and method. The electric power oil washing device comprises a washing oil tank, a circulating spraying unit, a waste liquid discharging unit and a first oil liquid discharging unit. The washing oil tank is used for inputting and accommodating oil and water for electric power to be treated; the first end of the circulating spraying unit is connected with the side part and / or the bottom of the washing oil tank, the second end of the circulating spraying unit is connected with the top of the washing oil tank, and the circulating spraying unit is used for conveying a mixed solution of to-be-treated electric oil and water to the top of the washing oil tank and spraying downwards; the waste liquid discharging unit is arranged at the bottom of the washing oil tank; and the first oil liquid discharging unit is arranged at the bottom of the washing oil tank. According to the invention, the distribution and precipitation characteristics of chlorine, pickling substances and oil sludge and the characteristic that additives in oil are insoluble in water are utilized, water is used for dissolution, the problem that chlorine cannot be effectively removed is solved, most acidic substances and part of oil sludge are removed by means of water, the cost is reduced, and the problem of secondary pollution in the treatment process is avoided.

The invention relates to the technical field of hand mold cleaning, in particular to a ceramic hand mold cleaning device which comprises a water washing pool and further comprises an alkali washing pool, a ceramic hand mold cleaning device and a ceramic hand mold cleaning device. The pickling tank is mounted at one end, opposite to the water washing tank, of the alkaline washing tank, and the ceramic hand mold enters the pickling tank after being subjected to alkaline washing by the alkaline washing tank; the three circulating driving components are respectively mounted in the water washing tank, the alkali washing tank and the acid washing tank and are used for driving liquid in the water washing tank, the alkali washing tank and the acid washing tank to circularly flow; the two showering assemblies are mounted between the alkali washing pool and the pickling pool and at one end, back to the alkali washing pool, of the pickling pool, and are used for synchronously moving the ceramic hand mold, washing the ceramic hand mold around the ceramic hand mold and washing residual liquid on the surface of the ceramic hand mold subjected to pickling or alkali washing; the whole process of the device effectively avoids dilution or neutralization caused by the fact that acid and alkali liquid is brought into the next pool, the service life of cleaning liquid is prolonged, the replacement cost is reduced, and an efficient, stable and economical cleaning scheme is achieved.

This invention relates to a method for preparing a self-purifying stepped ring packing, belonging to the field of water pollution purification materials. The method comprises the following steps: after acid washing and activation of ceramic stepped rings, a neodymium-niobium-zinc precursor is sprayed onto the surface of the ceramic stepped rings using a thermal spraying method. A series of drying and calcination processes are then performed to coat the surface of the ceramic stepped rings with a neodymium-niobium-zinc composite oxide active coating. The coating accounts for 3.6% to 3.9% of the total mass of the self-purifying stepped ring packing and exhibits high activity in decomposing organic pollutants. This packing can stably remove organic pollutants from wastewater over a long period, requiring minimal maintenance and regeneration during use, and has broad application prospects in practical wastewater treatment.

The present invention relates to the technical field of kitchen waste treatment, and particularly relates to a treatment device and a preparation method for preparing carbon source from kitchen waste. The treatment device includes a tank body, a double-circulation stirring device, an acid washing tower, an oil and slag removal device, and a slurry storage tank. The double-circulation stirring device includes a first circulation coil pipe and a second circulation coil pipe arranged in the tank body, and both the first circulation coil pipe and the second circulation coil pipe can aerate and stir the slurry; the air inlet of the acid washing tower is communicated with the tank body, and the air outlet of the acid washing tower is communicated with the first circulation coil pipe and the second circulation coil pipe; the oil and slag removal device is communicated with the tank body, and the oil and slag removal device can pump out the floating oil at the top of the slurry and the sediment at the bottom of the slurry from the tank body; the slurry storage tank is communicated with the tank body. The treatment device integrates functions of ammonia nitrogen absorption, oil and slag removal, and hydrolysis, greatly reducing the number of devices, and the various mechanisms can cooperate with each other, with high operation efficiency.

A high-strength Portland cement slurry for ultra-high-temperature cementing, a preparation method therefor and an application thereof. In parts by weight, the composition of the cement slurry comprises: 100 parts of Portland cement, 4-6 parts of a high temperature anti-cracking material, 80-105 parts of a high-temperature reinforcing material, 70-78 parts of water, 0.5-1.5 parts of a dispersant, 1-3 parts of a fluid loss reducer, 0.5-2.5 parts of a retarder and 0.2-0.5 parts of a defoamer; the high-temperature reinforcing material is a combination of acid-washed quartz sand, metakaolin and aluminum sulfate, a combination of acid-washed quartz sand, metakaolin, feldspar and sodium sulfate, or a combination of acid-washed quartz sand, metakaolin, feldspar and calcium nitrite. The cement slurry has good settling stability, rapid strength development in low temperatures, high compressive strength of cement stone at a high temperature of 600° C., and stable development of long-term high-temperature compressive strength.

The invention relates to a Bi2O3 / Bi-Nx co-doped carbon-based composite coating material as well as a preparation method and application thereof, the composite coating material is prepared by taking SiO2 nanospheres as a hard template and polyquaternium-7 as a nitrogen source, forming a three-dimensional carbon skeleton structure with hierarchical pores after alkali etching, and then performing acid pickling and secondary carbonization processes. According to the preparation method, a composite active center system of the atomic-scale dispersed bismuth and the Bi2O3 phase is successfully constructed, the zinc deposition behavior is optimized by precisely regulating and controlling the synergistic effect mechanism of the atomic-scale dispersed bismuth and the Bi2O3 phase, and the zinc anode coating with high zinc affinity and long cycle stability is prepared.

The application belongs to the technical field of building materials, and particularly relates to a filling cementing material based on titanium gypsum and fly ash and application thereof, and comprises the following raw materials in parts by weight: fluorine-stabilized titanium gypsum 30-40 parts, modified slag powder 15-25 parts, fly ash 25-35 parts, sulphoaluminate cement 5-10 parts, quicklime 2-5 parts, silica fume 0.5-1.5 parts, water glass 1.5-3 parts, water reducing agent 0.3-0.6 parts, and retarder 0.05-0.15 parts; the fluorine-stabilized titanium gypsum is prepared by acid washing activation, iron-aluminum complexation and calcium salt precipitation fluorine fixation, and the modified slag powder is prepared by mechanical activation, fluidized bed step-by-step coating and silane modification. The application solves the fluorine damage problem of titanium gypsum through modification of core raw materials and synergy of multiple components, optimizes the fluidity and stability of the cementing material, improves the mechanical strength at each age, and is suitable for filling construction in building engineering, and has the advantages of environmental protection and economic value.

The utility model discloses a tail gas recycling device for a desulfurization regeneration tower. The tail gas recycling device comprises a tail gas circulating process, a tail gas recycling process and a tail gas destroying process, the tail gas circulation process comprises a first regeneration tower and a second regeneration tower, a desulfurization solution circularly flows into the second regeneration tower after passing through the first regeneration tower, released diffused gas is mixed with compressed air after passing through a diffusion port and a gas booster pump, and a gas source in the second regeneration tower is mixed with the desulfurization solution and then enters a foam tank; diffused gas of the second regeneration tower is connected with a tail gas recovery process through a diffusion port; the tail gas recovery process comprises an alkaline washing tower, an acid washing tower and a water washing tower, diffused gas passes through the alkaline washing tower, the acid washing tower and the water washing tower and then is connected with the tail gas damage process, and the alkaline washing tower, the acid washing tower and the water washing tower are further connected with a desulfurization liquid section, a foam tank, an ammonium sulfate mother liquor section and an ammonia distillation wastewater section respectively; one end of the incinerator is connected with a tail gas recovery process and compressed air mixture, and the other end of the incinerator directly discharges gas.

The invention belongs to the technical field of new energy materials, and particularly relates to a composite hard carbon material based on red mud and lignin as well as a preparation method and application of the composite hard carbon material. The preparation method comprises the following steps: respectively pretreating red mud and lignin, then preparing a red mud and lignin composite precursor, and then carrying out carbonization treatment and acid pickling post-treatment to obtain the composite hard carbon material. According to the method, the red mud and the lignin are compounded to prepare the hard carbon for the first time, the utilization rate of the red mud and the lignin is remarkably increased through cooperative regulation and control of a metal oxide template effect and a biomass carbon source, and the production cost of the hard carbon is reduced; the graded porous structure improves the ion transmission rate and the electrochemical performance; metal salt can be recycled from pickling waste liquid, and no toxic by-product is generated in the whole process.

The present application belongs to the technical field of environmental protection, and particularly relates to a high-concentration odor combined treatment device and method for kitchen waste. The odor pretreatment unit of the treatment device comprises an alkali washing tower and an acid washing tower, and the outlet of the alkali washing tower is connected to the inlet of the acid washing tower. The odor biological treatment unit is a combined biological filter tank, which comprises a biological trickling filter section, a pre-washing section and a biological filter section connected in series, and the inlet of the biological trickling filter section is connected to the outlet of the acid washing tower. The odor deep treatment unit comprises a double-mediator barrier low-temperature plasma equipment, a delay oxidation tower and a spraying tower connected in series, and the inlet of the double-mediator barrier low-temperature plasma equipment is connected to the outlet of the biological filter section. The double-mediator barrier low-temperature plasma equipment is used for removing residual refractory odor substances in the gas. The delay oxidation tower is used for prolonging the gas residence time, and the spraying tower is used for the final purification of the gas. The present application can efficiently and accurately remove odor-causing substances, and the treated gas can meet the environmental protection requirements.

The invention relates to the technical field of carbon tritium sampling, and discloses a carbon-14 multifunctional sampling device and a use method thereof.The multifunctional sampling device comprises a first sampling bottle, a second sampling bottle, a third sampling bottle, a fourth sampling bottle, a flowmeter, a high-temperature catalytic furnace, an air pump, a first three-way valve, a first four-way valve, a second four-way valve, a second three-way valve and an acid pickling mechanism; the pickling mechanism comprises a pickling solution storage container, a liquid pump and a pickling reserved pipe; the first three-way valve, the first four-way valve, the second four-way valve, the second three-way valve and the pickling mechanism are additionally arranged on an original pipeline, blockage of a sampling loop is removed through pickling, equipment faults are avoided, the normal operation state and the pickling state of equipment can be rapidly switched, preparation work before pickling is simplified, and the production efficiency is improved. And the first three-way valve has the function of preventing suck-back to protect the flowmeter, the second four-way valve has the function of preventing suck-back to protect the high-temperature catalytic furnace, and the problems of equipment damage faults and the like are effectively prevented.

This utility model relates to the technical field of sand and gravel washing equipment, specifically to a washing device for cleaning quartz sand, comprising: a scrubbing machine for scrubbing quartz sand and having a discharge port for discharging quartz sand from the scrubbing machine after scrubbing; an acid washing tank for holding an acidic solution; and a slope dewatering mechanism disposed between the scrubbing machine and the acid washing tank, inclined from the scrubbing machine towards the acid washing tank, capable of receiving the quartz sand output from the scrubbing machine; wherein the quartz sand output from the scrubbing machine falls onto the upper end of the slope dewatering mechanism and rolls down into the acid washing tank via the slope dewatering mechanism. This utility model, by providing a slope dewatering mechanism between the scrubbing machine and the acid washing tank, can remove most of the water adhering to the quartz sand before it is put into the acid washing tank, thereby preventing a rapid decrease in the concentration of the acidic solution in the acid washing tank and ensuring the acid washing effect of the quartz sand.