198results about How to "No secondary pollution" patented technology

The invention belongs to the field of preparation of high-end carbon materials, and relates to a method for desulfurizing high-sulfur petroleum coke. The core of the invention is to construct a'desulfurization-acidification-regeneration 'three-step closed cycle system. The system takes magnesium oxide as a circulating medium, firstly magnesium oxide reacts with sulfur in petroleum coke at a high temperature to be converted into magnesium sulfide, then sulfur is released and recovered through an acidification step, meanwhile magnesium is converted into an intermediate product magnesium hydroxide, and finally, the magnesium medium is recovered to be active through a thermal regeneration step, magnesium oxide is obtained, and circulation is completed.

This invention discloses a method for enhancing the recovery of fine-grained titanium ore, belonging to the field of fine-grained titanium ore beneficiation technology. The steps include: (1) pre-enrichment; (2) preparation of modified collectors; (3) desulfurization; (4) multi-dimensional interface-controlled flotation; and (5) deep quality improvement. This invention, by adding a highly efficient activator, interacts with the surface of ilmenite to oxidize more ferrous ions to ferric ions, thereby increasing the number of active adsorption sites of the collector. Simultaneously, it modifies existing unsaturated fatty acid collectors, thereby increasing their dispersion, dissolution, and adsorption capabilities. Under the combined effect of these two factors, the flotation grade and recovery rate of fine-grained ilmenite are significantly improved, achieving the goal of enhancing the recovery of fine-grained titanium ore. The fine-grained titanium ore recovery method provided by this invention not only obtains qualified titanium concentrate, but also features flexible process implementation, low cost, small wastewater treatment volume, and no secondary pollution.

This invention discloses a resource-based treatment system and method for barium sulfide slag. The system involves crushing and leaching the barium sulfide slag using a pretreatment unit, thereby leaching out the barium sulfide. The barium-enriched washing solution is then processed through an electrophoretic deep treatment unit to achieve high-value recovery of sulfur and barium elements, ultimately realizing the resource utilization of the barium slag. The entire process is pollution-free and has the advantages of being environmentally friendly, having high added value, high sulfur utilization efficiency, low cost, and simple operation. It is suitable for large-scale industrial applications and has broad market prospects and significant economic benefits.

The invention relates to the cross technical field of solid waste resource utilization and low-carbon building material preparation, in particular to a seawater and fly ash coal-based solid waste material preparation method which comprises the following steps: step 1, carrying out ball milling modification on fly ash, and filtering impurities from seawater to obtain pretreated seawater; 2, adding a composite alkali activator into the pretreated seawater to prepare an excitation solution, and reacting with the modified fly ash at 60-70 DEG C for 90-120 minutes to obtain an active calcium ion dissolution solution; 3, a trioctylamine-sulfonated kerosene system with the volume ratio being 1: (3-5) is used for extraction for 40-50 min at the temperature of 35-40 DEG C, and chloride ions are removed; and 4, transferring the dechlorinated solution into a high-pressure reaction kettle, introducing carbon dioxide under the conditions of 0.8-1.2 MPa and 55-65 DEG C for mineralization for 180-240 minutes, and curing, drying and demolding the slurry to obtain the finished product material. And the material performance index meets the ocean engineering building material standard.

This invention relates to the field of heavy metal contaminated water or soil remediation technology, and discloses the application of magnesium-based cementitious materials in heavy metal ion remediation in ultra-stable mineralized environments. This invention can achieve good heavy metal adsorption effects in a short time, without the release of toxic substances or secondary pollution, and is suitable for the remediation of heavy metal contaminated water or soil.

The present application belongs to the technical field of white carbon black preparation, and particularly relates to an industrialized preparation method for preparing high-purity low-fluorine white carbon black by taking fluorine-containing silicon slag as raw material, and through mechanical activation, composite alkali leaching, fractional impurity removal, low-temperature crystallization and surface modification. The present application can realize harmless disposal of the fluorine-containing silicon slag and high-value regeneration and utilization of fluorine and silicon resources, has good environmental protection value and economic benefits, and has wide industrialized application prospect.

The present application discloses a method for improving the activity of stainless steel slag, which relates to the technical field of comprehensive utilization of resources. The method for improving the activity of stainless steel slag includes the following steps: placing hot stainless steel slag in a hot soaking pit or a slag pot, and hot soaking and spraying water for cooling to 100°C - 1000°C; introducing carbon dioxide in the first stage (pressure 0.1 - 0.5 Mpa, time 0.5 - 2 hours) into the container, and spraying water synchronously (the amount of sprayed water is 0.3 - 0.7 times the mass of the slag); then introducing air (pressure 10 - 15 Mpa, time 0.5 - 1 hour); then introducing carbon dioxide in the second stage (pressure 0.2 - 0.6 Mpa, time 1 - 2 hours), and spraying a small amount of water synchronously (the amount of sprayed water is 0.03 - 0.08 times the mass of the slag); after cooling, highly active stainless steel slag is obtained. With the collaborative design of staged gas introduction and spraying water for cooling, the content of free calcium oxide in the stainless steel slag is less than 2%, and the activity index reaches the standard of primary steel slag powder, greatly improving the resource utilization rate. At the same time, the fixed emission reduction of carbon dioxide is achieved, which helps with resource recycling and low-carbon development.

The present application relates to the technical field of soil treatment, in particular to a soil remediation system for solid waste multi-component joint activation, which comprises a boiler tail gas purification and waste heat cascade utilization unit, a biochar preparation unit, a low-rank coal slime preparation porous carbon unit, a power plant ash alkali metal leaching and residue activation unit, a mixed component composite activation unit and a compound fertilizer forming preparation unit; the boiler tail gas purification and waste heat cascade utilization unit is used for removing dust and acid gas, and the waste heat is used for preparing biochar by biomass pyrolysis and preparing porous carbon by low-rank coal slime; the present application can prepare soil remediation products with water and fertilizer retention and harmlessness by the organic and inorganic compounding of biomass, low-rank coal slime and power plant ash, which has important significance for the treatment and harmless remediation of special soil such as saline-alkali soil and desert soil.

The application relates to the technical field of sewage treatment, and provides a plasma water circulation treatment system, which is characterized by comprising a water tank, a plasma generator, a fan and a pump; the water tank and the plasma generator are connected through pipelines to form a circulation loop; the fan is connected with the plasma generator; the pump is arranged in the pipeline and used for pumping water in the water tank into the plasma generator; a plurality of water level sensors are arranged in the water tank along the height direction of the water tank in sequence, and the water level sensors are used for detecting the water level of water in the water tank. The plasma water circulation treatment system adopts a plasma discharge mode to treat sewage, can effectively kill harmful microorganisms in the sewage, does not cause secondary pollution, improves the sewage treatment efficiency, and reduces the sewage treatment cost.

The application discloses an electrolytic catalytic biological denitrification reactor and relates to the technical field of sewage treatment. The electrolytic catalytic biological denitrification reactor comprises a reactor body, an external power supply connected to the reactor body, an anaerobic reaction chamber and an aerobic reaction chamber separated by a first partition wall in the inner cavity of the reactor body, and a first drainage hole formed in the first partition wall. A water inlet is formed in the outer side wall of the anaerobic reaction chamber. A unit cathode and a water flow propeller are fixed in the anaerobic reaction chamber. A water outlet is formed in the outer side wall of the aerobic reaction chamber. A unit anode and a water flow propeller are fixed in the aerobic reaction chamber. The unit anode and the unit cathode are connected in parallel through wires, and the wires are connected to the external power supply. The electrolytic catalytic biological denitrification reactor can effectively improve the biological denitrification efficiency, reduce the pollution to the environment, has strong adaptability to water quality changes, has good sludge settling performance, is easy to maintain, manage and operate, has high denitrification efficiency, and has small land occupation.

This invention relates to the field of wastewater treatment technology, specifically to a metal-doped bismuth ferrite-based perovskite composite material, its preparation method, and its applications. The molecular formula of the metal-doped bismuth ferrite-based perovskite composite material is Bi. 1‑x A x Fe 1‑y B y O3; 0 ≤ x < 1, 0

This utility model discloses a processing machine for near-expiry and expired food in supermarkets, aiming to solve the problems of high reliance on manual labor, limited functionality, and difficulty in hygiene maintenance in existing supermarket food processing methods. The processing machine includes a frame with a channel on one side for the entry and exit of a collection bin. It also integrates an elevator, a hopper mechanism, a crusher, a gate valve, a filter box, and a drying system. The elevator automatically lifts and tilts the garbage bin containing food to feed it into the hopper mechanism. After the food enters the crusher through the hopper mechanism and is crushed, it falls into the collection bin through the gate valve. During the washing stage, the gate valve closes, and wastewater flows into the filter box for treatment through a drain pipe. The drying system dries the hopper to prevent residue. This processing machine achieves full automation, reduces labor costs, is environmentally friendly and hygienic, and is suitable for the diverse near-expiry and expired food processing needs of supermarkets.

The invention relates to a negative pressure system for collecting algae sediments. The negative pressure system for collecting the algae sediments comprises a negative pressure box and a collecting box, wherein the negative pressure box is arranged at the top of the collecting box; an algae outlet is formed in the bottom of the negative pressure box; an opening is correspondingly formed in the top of the collecting box; the top of the negative pressure box is provided with an algae inlet, and the side surface is provided with a negative pressure interface; a filter plate is fixedly arranged in the negative pressure box, the edge of the filter plate is connected with the inner wall of the negative pressure box, and the filter plate is parallel to the plane where the negative pressure connector is located. According to the negative pressure system for collecting the algae sediments, negative pressure driving is adopted, algae enter through the algae inlet of the negative pressure box, filtered water flow is discharged under the action of the filter plate, automatic collection of the algae can be achieved, and the collection efficiency is high.

The present application belongs to the field of brine chemical industry and crystallization separation technology, and particularly relates to a brine selective salt precipitation method based on pH and temperature coordination pulse oscillation. The characteristic response time of different salts is determined through step disturbance experiment, and an asymmetric periodic pulse waveform meeting the selective condition is designed accordingly. A controller generates pH pulse and temperature pulse in real time according to a segmented function, so that the target salt is preferentially nucleated and grown, and the impurity salt is passively inhibited by kinetics due to response lag. The pulse response intensity and the selectivity factor are calculated, and the pulse parameters are optimized according to the adaptive law, and the impurity co-precipitation is prewarned through the second derivative of conductivity. The present application does not need static solubility data, can adapt to the fluctuation of brine composition, can calculate the selectivity factor in real time through the double-frequency pulse method, can automatically adjust the pulse amplitude and period by using the gradient descent adaptive law, can prewarn the impurity co-precipitation by using the second derivative of conductivity, can ensure that the system always works in the optimal selective interval, can realize high-selectivity separation, and can improve the product purity.

The invention provides a nanotechnology-based fresh-cut leaf fresh-keeping packaging material, and relates to the technical field of packaging materials. The fresh-cut leaf fresh-keeping packaging material based on the nanotechnology comprises the following raw materials in parts by weight: 100 parts of compound polysaccharide, 2-4 parts of core-shell type adsorption functional filler, 1-2 parts of nano silver, 3-4 parts of nano ZnO, 3-5 parts of nano cellulose and 20-30 parts of a plasticizer, the compound polysaccharide is a compound system of chitosan, starch, radix puerariae powder or sodium alginate, and the compounding mass ratio is 3: 1-5: 1; the core-shell type adsorption functional filler is composed of an adsorption functional core and a nano wrapping layer, wherein the adsorption functional core is ZIF-8 with the particle size of 50-200nm or a compound filler of ZIF-8 and montmorillonite (the proportion of montmorillonite is 10-20wt%); and the nano wrapping layer is made of a force-induced rupture type biodegradable material with the thickness of 10-20 nm. The adsorption starting is controllable, the adaptability is high, the preservation time is long, and the preservative is safe and degradable.

The application relates to the field of water treatment and environmental protection technology. The application provides a water body micro-plastic degradation device and method, the device comprises a water body container, a micro-plastic unit arranged on a side wall surface of the water body container, a laser unit arranged on one side of the water body container, a monitoring unit, a general control unit and a valve control unit. The application effectively reduces the laser energy required for degrading the water body micro-plastics in the water body to be treated, effectively improves the reaction speed, realizes effective direct degradation, does not cause secondary pollution, and solves the problems of low efficiency in treating large-size particles and incomplete treatment of small-size particles by using a single energy source.

The invention discloses an intelligent irrigation and self-degradation rod device for desert sand prevention, control and stabilization, and belongs to the technical field of desertification control and ecological restoration engineering. The device is of an integrally formed structure and comprises an overground spiral rod and an underground water storage fermentation tank, the total length is 55 cm, and the diameter is 3 cm. The outer surface of the overground spiral rod is provided with three vortex type spiral sand blocking water flowing grooves used for blocking sand wind and collecting rainwater, and the collected rainwater is guided into the underground water storage fermentation tank through a water guide pipe. The device body is made of degradable composite materials and comprises 40% of agricultural and pastoral straw sawdust, 30% of coal gangue, 20% of organic clay and 10% of biological adhesive. An automatic drainage system based on the siphon principle is arranged in the water storage fermentation tank, and the functions of water collection, water storage and irrigation can be achieved without external power. The device can be completely degraded in a desert environment within 2-3 years, and soil nutrients are released. The device is standardized in structure, suitable for mechanical arrangement and used for desert soil improvement and ecological restoration.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a high-salinity wastewater materialization method and complete equipment. The high-salinity wastewater materialization complete device of the present invention comprises: a reactor; the aeration pipe is used for supplying air to the reactor; a first vertical porous sieve column is arranged on the first-layer sieve column supporting plate; one end of the first-layer sieve column supporting plate is connected with the inner wall of the reactor, the other end of the first-layer sieve column supporting plate is connected with the first liquid level positioning plate, the first liquid level positioning plate, the first-layer sieve column supporting plate and the inner wall of the reactor define a first liquid accumulation area, and the first liquid accumulation area is used for promoting gas-liquid contact of gas and high-salinity wastewater; the device further comprises a high-salinity wastewater circulating pipe. The complete equipment for materialization of the high-salinity wastewater can be used for treating the high-salinity wastewater through gas-liquid separation, so that the treated high-salinity wastewater can be applied in a materialization manner.

This invention belongs to the field of heavy metal pollution remediation technology, and relates to the preparation and application of a cadmium passivating agent for weakly alkaline soil. The weakly alkaline soil cadmium passivating agent mainly comprises the following components by weight: 30-50 parts of a mineral complex, 40-60 parts of a bioactive component, and 5-15 parts of an auxiliary stabilizer. The mineral complex includes natural sepiolite, calcium-based bentonite, and a polyether-polyester diblock copolymer; the bioactive component includes microbial agents, phosphorus-modified biochar, lecithin, and phosphatidylserine; and the auxiliary stabilizer includes nano-hydroxyapatite and a chitosan-grafted polyaspartic acid complex. This weakly alkaline soil cadmium passivating agent exhibits excellent remediation effects on cadmium in contaminated soil, effectively preventing or reducing the entry of cadmium and other heavy metals into the food chain, and has significant market potential.

The application relates to a preparation method of an axial chlorine-coordinated cobalt-based photocatalyst and PET micro-plastic degradation application thereof. In view of the problems of difficult control of the electronic structure of a traditional M-N4 catalyst, easy recombination of photo-generated carriers and poor controllability of an axial coordination process, an equatorial pre-anchoring combined axial chlorine coordination strategy is innovatively adopted: thiourea, melamine and cobalt nitrate hexahydrate are used as raw materials to form Co-N and Co-S equatorial coordination structures through high-temperature pyrolysis, the coordination direction is anchored and a side reaction path is closed; then a chloride is used as a chlorine source to realize axial chlorine modification of a Co center through gas phase directional coordination. The method is simple in process, low in cost and free of secondary pollution. The prepared catalyst has a unique asymmetric coordination structure, the electronic structure is optimized, the carrier separation efficiency is improved, the photocatalytic degradation effect on PET micro-plastics is excellent, the catalyst has good stability and circulation, and has great application potential in micro-plastic pollutant treatment.

The application discloses a kind of resource recycling methods for preparing tea pigment by tea dregs, and relates to the technical field of waste resource utilization;The method uses tea dregs after extracting tea pigment as raw material, obtains pure tea dregs after pretreatment, and then separates cellulose components and lignin-hemicellulose mixed components by alkali leaching-screening combined method, and then uses the two components as raw material respectively, shares core drying process, and synchronously prepares tea dregs dietary fiber and biomass briquetting fuel.The present application realizes the precise high-value utilization of different components of tea dregs, cellulose is used to produce high-purity dietary fiber, lignin-hemicellulose is used to produce high-performance briquetting fuel, and there is no component waste;Process procedure sharing, smooth connection.

The invention discloses a microbial carrier implantable soil microstructure improvement device and method, the device takes microbial carrier precise implantation as a core, integrates multiple functions of targeted layered implantation, carrier-soil microstructure synchronous reconstruction, microcapsule in-situ activation and the like, and can improve the soil microstructure through an intelligent regulation and control system and modular design. And efficient improvement of the soil microstructure in different soil layers and different scenes is realized. The device comprises a power module, a control module and a switchable function module, innovatively adopts a targeted layered injection mechanism, a carrier-soil mixing and shaping assembly and an environmental response type microcapsule spray-seeding activation module, and is matched with a degradable carrier material modification assembly and a new energy driving system. The problems that a traditional device carrier is low in implanting precision, not tightly combined with soil, single in application scene and the like are solved.

The present application relates to a kind of microbial combined electric repair method for removing soil Cd, using electric repair contaminated soil device, the device includes soil chamber, anode chamber and cathode chamber at both ends of soil chamber, anode chamber and cathode chamber are equipped with anode plate, cathode plate respectively, direct current stabilized power supply is equipped between anode plate and cathode plate, soil chamber is equipped with solid-liquid separation baffle between anode chamber and cathode chamber, including the following steps: S1, fill Cd contaminated soil in soil chamber, add electrolyte solution to Cd contaminated soil, cover soil upper surface, soak 20-30h;S2, add organic acid buffer solution to cathode chamber;S3, input direct current;S4, filamentous fungi are inoculated in soil close to cathode region, repair 7-9d;S5, remove filamentous fungi from soil, complete the repair of contaminated soil.The present application makes Cd in soil migrate to soil close to cathode region, filamentous fungi enrich heavy metal Cd, after removing filamentous fungi, make soil Cd concentration reach farmland soil standard.

The present application belongs to the technical field of contaminated site remediation and environmental engineering, and relates to a construction method and application of a green bioremediation system for bisphenol A in a production enterprise site. The present application provides a construction method of a green bioremediation system for bisphenol A in a production enterprise site, and the construction method comprises the following steps: S1, BPA degrading bacteria screening and culture; S2, micro-nano biochar preparation; S3, bacteria-carbon immobilization; S4, bioremediation system construction; the BPA degrading bacteria are Acinetobacter baumannii A1449.The present application can realize efficient remediation of BPA in soil and water.

The application discloses a method for repairing heavy metal contaminated soil by combining plants and microorganisms, and comprises the following steps: planting alfalfa seeds in heavy metal contaminated soil; inoculating lead and zinc copper resistant bacteria L1 into the heavy metal contaminated soil after 30 days when the seeds germinate; and harvesting the alfalfa after the growth period of the alfalfa ends. The application has a very obvious effect on adsorbing lead, zinc and copper heavy metals in the soil. The plant raw material is low in cost, the preparation process is simple and easy to operate, and the bacterial liquid is easy to culture. The application has small investment for removing heavy metals and no secondary pollution.

This invention provides a peony essential oil extraction and filtration device, relating to the field of plant essential oil extraction technology. It includes a stirring assembly, a conveying assembly, a multi-stage filtration unit, and a moving assembly connected in sequence. The stirring assembly includes a motor, a stirring shaft, primary stirring blades, and secondary stirring blades. The bottom output shaft of the motor is driven and connected to the stirring shaft, and the primary and secondary stirring blades are fixedly connected to the stirring shaft from top to bottom. The conveying assembly includes a diaphragm pump. The inlet of the diaphragm pump is connected to the outlet of the stirring assembly, and the outlet of the diaphragm pump is connected to the multi-stage filtration unit. This invention integrates stirring, extraction, conveying, and filtration functions into one unit, eliminating the need for manual material transfer, reducing the risk of essential oil volatilization and contamination, and improving production efficiency. The diaphragm pump prevents solid impurities from clogging the solution, and the fluororubber diaphragm is resistant to organic solvents and causes no secondary pollution, making it suitable for conveying essential oil mixtures containing impurities.

The application discloses a kind of high concentration pyridine wastewater full biological treatment method, belong to the field of biological method treatment high concentration pyridine wastewater.The treatment method in wastewater is sequentially through pyridine strain screening domestication culture strain optimization culture-wastewater treatment, this process is simple, reaction efficient, can be 4000mg / L below pyridine full biodegradation, pyridine degradation efficiency is higher than 99%;The application can be full biological method treatment high concentration pyridine wastewater, effect is good, cost is low, no secondary pollution.The method of the application is the upgrading of ordinary biological method, widen the scope of application of biological treatment pyridine wastewater.

The invention discloses a heavy metal emission reduction and sludge reduction treatment process method for circuit board wastewater. The invention provides a layered precipitation strategy of'first acid, second alkali and second sulfur '. The method comprises the following steps: performing acid precipitation on alkaline organic wastewater by using acidic wastewater, and recovering printing ink residues; carrying out air stripping treatment on the copper ammonia wastewater by utilizing an alkaline condition, and precipitating high-purity copper hydroxide; and finally, carrying out deep precipitation on residual complexing heavy metals by utilizing excessive sulfides in the pretreatment stage, and further recovering copper resources in the comprehensive water tank through coprecipitation of copper hydroxide and copper sulfide. Sludge generated in each process is classified and treated; printing ink slag, biochemical residual sludge and copper / nickel sulfide sludge are subjected to synergistic pyrogenic process treatment; copper hydroxide sludge is selectively subjected to acid dissolution to prepare copper sulfate. Lime, ferrous sulfate and polyaluminum are not used in the whole process. According to the method, the medicament is utilized to the maximum extent, the sludge is reduced by 50% or above, and the resource value of valuable metal is increased by 3-5 times.

The utility model discloses a kind of hot desorption tail gas back burning device, it is related to soil remediation and waste gas processing technical field, including back burning device ontology, the inside of the back burning device ontology is provided with first air mixing section, ignition combustion section and second air mixing section, tail gas inlet is set in the side above the back burning device ontology, fresh air inlet is provided in the other side above the back burning device ontology.The utility model is extracted by hot desorption to organic waste gas and is sent to combustion chamber incineration, so that it does not need to use conventional adsorption, oxidation and so on to process organic pollution waste gas, so as to not produce secondary pollution, and some combustible organic pollutants combustion can produce heat value, which is just available to provide for the contaminated soil to be repaired heating, can reduce the use amount of natural gas or liquefied petroleum gas, more efficient and energy saving.

The utility model relates to dust removal tower technical field, the utility model provides a kind of high-efficiency dynamic water dust removal equipment, it is installed in the cyclone bin of dust removal tower and located below spray layer, for making flue gas and spray water fully contact, including cylinder, the top and bottom of cylinder are open;Positioning column is arranged in cylinder, and it is arranged along the axial direction of cylinder, and the containing space is formed between the outer wall of positioning column and the inner wall of cylinder;A plurality of annular flow control panels are located at the bottom opening of cylinder, and flow guide groove is formed between adjacent annular flow control panels, and flow guide groove is used to make flue gas flow into containing space in tangent direction;A plurality of adsorption balls are placed in containing space, and adsorption ball can rotate around positioning column under the drive of flue gas.The above technical scheme solves the technical problems that the dust removal device in the prior art is difficult to meet the fine particulate matter emission requirements, and has high operating energy consumption, frequent maintenance, poor load adaptability and may cause secondary pollution.