223 results about "Environmental engineering" patented technology

The invention discloses a layered remediation method for chromium contaminated soil. The method comprises the following steps: detecting the actual chromium contamination condition of soil, determining the boundary of severe and mild chromium contaminated soil on soil depth, performing remediation on the severe chromium contaminated soil by adopting a chemical reduction stabilization method, performing remediation on the mild chromium contaminated soil by adopting a chemical or biochemical reduction stabilization method, performing soil conservation, balancing the soil acidity and alkalinity and performing later-stage tracking and monitoring. An actual chromium contaminated field serves as a support, the combined remediation methods are selected aiming at the current situation that the contamination degrees of the upper soil and the bottom soil are different, the severe chromium contaminated soil on the surface layer is subjected to remediation by adopting the chemical reduction stabilization method, the mild chromium contaminated soil on the deep layer is subjected to remediation by adopting the chemical or biochemical reduction stabilization method, the defects that the soil properties are not distinguished and a same remediation method is adopted in a unified mode in the previous research are overcome, and ex-situ remediation and in-situ remediation are combined to be used, so that the remediation method is reasonable in application under the condition that the remediation effect is guaranteed, the remediation cost is reduced, and the method can be applied to actual soil remediation on a large scale.

The invention relates to a method for degrading malodorous gas by coupling a biotrickling filter with dielectric barrier discharge and is used for mainly solving the problem in the prior art that total hydrocarbon cannot be effectively degraded when malodorous components in malodorous waste gas are effectively removed. By adopting the method for degrading the malodorous gas by coupling the biotrickling filter with the dielectric barrier discharge, the malodorous gas enters a buffering tank after entering a water-membrane separator to remove one part of water; after the waste gas flowing out of the buffering tank is monitored by a total hydrocarbon analyzer, the detected waste gas enters dielectric barrier discharge plasma equipment; the waste gas discharged from the dielectric barrier discharge plasma equipment is treated by an ozone analyzer to remove ozone, and then enters at least one biotrickling tower; the waste gas treated by the biotrickling tower is discharged from the biotrickling tower. By adopting the technical scheme, the problems are solved and the method can be used for degrading the malodorous gas.

The invention discloses a method for constructing a multi-stage subsurface flow constructed wetland system, and the method comprises the following steps: (1) selecting a littoral zone with a slope as a wetland pond or digging and backfilling to get a wetland pond with a slope; (2) grading and filling a matrix, namely designing stages according to the pollution load and the height difference of slope, and filling the matrix in each stage of the wetland; (3) arranging drainage holes, water outlet holes and water inlet holes; (4) planting plants, namely planting the plants on each stage of the wetland respectively. The method disclosed by the invention has the following beneficial effects: (1) the system constructed by the method has no influence on the coastal zone structure of a landscape water body. (2) the system constructed by the method has a better purification effect on water flowing into rivers and water contaminated by the landscape water body, especially has an obvious purification effect on pollutants such as SS (Stainless Steel), oil and COD (Chemical Oxygen Demand) and has a good removal effect on heavy metals, TN and TP. (3) the system constructed by the present invention can integrate the purification function with the greening of coastal zones, so that the diversity of landscape is enriched and the overall landscape effect is improved.

The invention relates to a method for recycling methylal in glyphosate wastewater. The method comprises the following steps of: 1) treating the chloromethane tail gas obtained by deacidifying the glyphosate through a dealcoholization kettle with three-stage condensation and multi-stage washing in a water scrubber, wherein the chloromethane gas enters into a compression system so as to be recycled, and the condensate enters into a dilute methyl alcohol storage tank; pumping the condensate in the dilute methyl alcohol storage tank into a preheating kettle with the temperature of 50-60 DEG C to preheat the dilute methyl alcohol for 10-15min, then, distilling the preheated dilute methyl alcohol in a distillation tower; distilling out the low-boiling point methylal from the top of the distillation tower, discharging after reflowing and condensing, and conveying the condensate into a collection tank. The method not only can effectively reduce the potential safety hazards caused by wastewater discharge, but also can effectively recycle the methylal, and can improve the recovery rate of the methylal to be more than 96%.

The invention discloses a simple and convenient synthesis method and application of waste grease based polyhydric alcohol. The synthesis method comprises the following steps: performing simple pretreatment such as filtration, dehydration and decoloration on waste grease, performing heating and stirring reaction with alkamine compounds, and performing amidation with free fatty acid in the waste grease and performing transesterification reaction with glyceride under heating conditions by using relatively high reaction activity of amino groups to form corresponding biological oil based polyhydric alcohol. The method disclosed by the invention is capable of achieving the purpose of turning waste into treasure by adopting the waste grease as a raw material, and an obtained polyhydric alcohol product has the characteristics of good biodegradability, simple and convenient preparation process, small emission of three industrial wastes, adjustable product structure and hydroxyl value, wide application range and low environmental influence level.

The invention relates to a water purifying device capable of rapidly replacing a filter element. The water purifying device comprises a filtering core and a water purifier body, wherein the filtering core comprises a plurality of filter elements for filtering and purifying water; a cylindrical shell is arranged outside the filtering core, and a water inlet and a water outlet are formed in two ends of the shell; the shell is formed by two hollow semi-cylinders, the inner wall of each semi-cylinder is provided with a leak-proof pad for preventing the water leakage, and an installation groove matched with the appearance of the filter element is formed in the leak-proof pad; the shell also comprises flanges which are positioned on the semi-cylinders and used for locking the shell by virtue of screws; when the filter elements need to be replaced, only the screws on the flanges need to be disassembled, and then the shell is opened, so that convenience in installation and disassembly is realized; and the integral structure is simple, and the cost is low.

An integrated apparatus for separating a mixture of carbon dioxide and at least one other gas and for separating air by air distillation is provided. The apparatus includes a CO₂ separation unit configured to separate the mixture, an air separation unit configured to separate air by cryogenic distillation, a water cooling tower that operates by direct contact, a line for sending water to the top of the tower, a line for sending at least one portion of the nitrogen-enriched gas stream to a lower level of the tower, a cooled water line for withdrawing cooled water from the tower and means for cooling the air upstream of the air separation unit, the cooled water line being connected to means for cooling the air upstream of the air separation unit and to the inlet and/or to the outlet of the unit for separating the gaseous mixture.

The invention discloses an aquaculture oxygenation system. The aquaculture oxygenation system comprises an air compressor used for supplying compressed air, an air storage tank used for storing the compressed air generated by the air compressor, an air supply main pipe connected to the air outlet end of the air storage tank, and a plurality of oxygenation devices located in pools used for aquaculture, and air supply branch pipes provided with pressure reducing valves are connected to pipe outlets of the air supply main pipe. Each oxygenation device comprises a top plate, side plates and a bottom support, wherein the side plates are arranged on the peripheral side of the top plate in a surrounding mode, oxygenation pipes are arranged at the bottom support in rows, and a guide port is formed in each side plate. The guide ports of all the oxygenation devices in the pools are distributed clockwise or counterclockwise. The peripheral lateral wall of each oxygenation pipe is provided with a plurality of micropores communicated with a pipe cavity of the oxygenation pipe. Each oxygenation device is connected with a pipe outlet in the corresponding air supply branch pipe through pipe openings of the corresponding oxygenation pipes. The aquaculture oxygenation system is stable in air supply and far in delivery distance, oxygenation can be realized without installing the oxygenation devices in all the pools, and the equipment is easy to install, low in energy consumption, low in usage cost and good in oxygenation effect.

The invention discloses a low-temperature peracetic acid disinfectant and a preparation method thereof. The low-temperature peracetic acid disinfectant is prepared by mixing a composite low-temperature solvent and peracetic acid in any proportion, and the composite low-temperature solvent comprises the following components in percentage by mass: 60-99% of water, 1-40% of an antifreezing agent, 0-5% of a thickening agent and 0-5% of a corrosion inhibitor. The low-temperature freezing liquid can be used at different low temperatures, the lowest freezing point can reach -25 DEG C, and the low-temperature freezing liquid also has the characteristics of small metal corrosion, low volatilization and low irritation. The invention solves the dilemma of lack of efficient, stable and environment-friendly products in current low-temperature disinfection, solves the problems of poor stability, high irritation, low activity at low temperature, poor effect and the like of conventional products, and can be used for disinfection in various links of a cold chain and various low-temperature environments.

The invention provides a system for continuously recycling a waste ternary lithium-ion battery and belongs to the technical field of recycling of lithium-ion batteries. The system comprises a pre-treatment unit, an acid leaching unit, a primary impurity removal unit, a co-precipitation unit, a secondary impurity removal unit and an ammonia recycling unit, wherein the pre-treatment unit comprises apulverizer, a pulse dust collection device, a positive and negative electrode powder cabin and a separation machine; the acid leaching unit comprises a leaching reaction kettle and a micro-filteringmachine I; the primary impurity removal unit comprises an impurity removal reaction kettle and a squeezing machine; the co-precipitation unit comprises a material preparation kettle, a co-precipitation reaction tank and a centrifugal machine; the secondary impurity removal unit comprises a secondary impurity removal reaction kettle and a micro-filtering machine II; the ammonia recycling unit comprises a heater, an evaporation crystallization device, a condenser and an ammonia liquid receiving tank. The invention further provides a technology for continuously recycling the waste ternary lithium-ion battery by utilizing the system. According to the system provided by the invention, a prepared nickel-cobalt-manganese ternary material precursor has high purity and large tap density; grains have a small grain diameter and narrow distribution and are uniformly mixed; a lithium sulfate solution can be directly used for producing lithium carbonate.

The present invention discloses an apparatus and method for treating perfluoro-compounds (PFCs). The method for treating PFCs includes: (a) decomposing PFCs and eliminating a first acid gas generated by the decomposition through a pre-cleaner; (b) filtering out dust particles from the exhaust gas through a filter; (c) electrifying the dust particles in the exhaust gas by electrical discharge and collecting dusts through a dust collector; (d) decomposing PFCs using a regenerative/catalytic reaction through a catalytic reactor; (e) eliminating a second acid gas generated by the regenerative/catalytic reaction through a post-cleaner; and (f) letting the purified exhaust gas out through a fan.

The invention discloses an environmentally friendly efficient disposable continuous waste gas treatment device. The environmentally friendly efficient disposable continuous waste gas treatment devicecomprises an open fire furnace and a washing tower, the open fire furnace is connected with an air inlet at the lower part of the left side of the washing tower through a gas pipe, a second filteringlayer, a first filtering layer, a catalytic apparatus, a spraying pipe, an upper gas buffering and filtering plate and a lower gas buffering and filtering plate are respectively arranged in the innerpart of the washing tower from top to bottom, an elastic strut is arranged at the middle part between the upper gas buffering and filtering plate and the lower gas buffering and filtering plate, a plurality of sprayers are arranged on the lower side of the spraying pipe, the right side of the washing tower is connected with a circulating water pipe at the right end of the spraying pipe, and the other end of the circulating water pipe is connected at the bottom part of the right side of the washing tower. The environmentally friendly efficient disposable continuous waste gas treatment device isconvenient to use and control, the purifying efficiency of the waste gas is high, the waste gas can be thoroughly purified at one time, the emission requirement is met, the thermal energy resource inthe waste gas is recycled, the energy is saved, and the environment is protected.

The invention relates to a phosphorus-free corrosion and scale inhibitor applicable to high-chlorine high-concentration-multiple circulating cooling water and a preparation method of the phosphorus-free corrosion and scale inhibitor, belonging to the technical field of water treatment. The technical problem to be solved by the invention is to provide the phosphorus-free corrosion and scale inhibitor with low toxicity, chloride resistance and low cost for high-concentration-multiple circulating cooling water containing high-concentration chloride ions. The phosphorus-free corrosion and scale inhibitor is prepared from the following raw materials in parts by weight: 3 to 5 parts of zinc sulfate, 4 to 7 parts of sodium gluconate, 2 to 4 parts of sodium molybdate, 0.5 to 2 parts of benzotriazole, 5 to 9 parts of and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 7 to 12 parts of polyepoxysuccinic acid and 3 to 5 parts of hydrolyzed polymaleic anhydride. Compared with similar corrosion and scale inhibitors, the phosphorus-free corrosion and scale inhibitor for high-concentration-multiple circulating cooling water provided by the invention has the advantages of strongtargeting performance, low toxicity, chloride resistance, low cost, simple operation, convenience, rapidness, environmental friendliness, safety, high efficiency and the like.

The invention relates to a multifunctional offshore wind power structure which comprises a pile body with the bottom arranged below a seabed surface, and seawater filtering and separating structures such as a wind turbine generator set arranged at the top end of the pile body. A folding type high-pressure nozzle is arranged on the outer wall of the pile body; a salt basking pond is arranged below the folding type high-pressure nozzle; a transparent water collecting cover body covers the outer part of the salt basking pond; and power umbrella drive skeletons are arranged in the centers of the salt basking pond and the transparent water collecting cover body. The multifunctional offshore wind power structure provided by the invention is compact and reasonable in overall structure; wind power generation, oxygen/hydrogen production, salt production and seawater desalination are organically integrated, so that collected resources are more diversified, and the most prominent load effectiveness problem in the wind power equipment is effectively solved; meanwhile, the structures of salt basking and seawater desalination are novel, so that the two resource extraction modes are optimized; and storage is easy, so that the possibility that the equipment structure is damaged is reduced.

This invention relates to water meter shell structure composed of shell and water ring tank, wherein, the shell core chamber and column water ring tank chamber with top mouth larger than down one; the water ring tank is of round cylinder with inside circle of round ring tank; the water ring tank outside and water tank inside are matched with water tank imbedded into water ring chamber to connect tank open to shell exit to form shell; the shell is fixed with water machine chip into machine chip matched with water ring tank.

The invention relates to a nickel-containing high-cobalt sulfide leaching technology. A leaching liquor rich in metal cobalt obtained through atmospheric pressure preheating and pressure leaching can directly enter a cobalt production system. The technology comprises the following technical steps of: (1) slurrying minerals in 10-20 g/l dilute acid solution, controlling the ratio of dilute acid volume to material mass at 6:1, and controlling slurrying temperature at 40-50 DEG C, slurrying time at 2-3 h and the concentration of slurrying end point acid at 5-15 g/l; (2) controlling the temperature of atmospheric pressure preheating at 80-85 DEG C; (3) controlling pressure leaching, controlling the ratio of dilute acid volume to material mass at 6:1, reaction temperature at 145-165 DEG C, and leaching partial pressure oxygen at 0.20-0.25 Mpa and reaction time at 6-8 h. In the invention, a nickel and cobalt sulfate solution containing more than 50 g/l cobalt is obtained, i.e. more than 98% of Ni and Co in the nickel-containing high-cobalt sulfide material is leached out to enter the solution.

The present invention discloses an ecological garden rainwater cyclic utilization system. The ecological garden rainwater cyclic utilization system comprises a water pool, a right outer wall of an inserted rod is in clearance fit with a right upper inner wall of the water pool, a left middle inner wall of a box body and a left middle inner wall of a spring, a push block sleeve the right outer wallof the inserted rod, a right end of the push block is attached to a left end of the spring, and a right end of the spring is attached to a right inner wall of the box body. In the ecological garden rainwater cyclic utilization system, a filter plate is fixed in a support plate, so that the filter plate can be rapidly disassembled, problems that a filtering structure on the rainwater cyclic utilization system mostly adopts bolts for connection and is time and effort-wasting to disassembly and change are solved, a sliding rod drives a scraping plate to move left and right to clean filterable debris on the filter plate to prevent the filter plate from blocking up, and problems that in the ecological garden cyclic system, the filterable debris on the filter plate cannot be timely cleaned, thefilter plate is blocked up, and the cyclic system is paralyzed are solved.

The invention discloses a combined method for treating kitchen waste and waste plastics to prepare hydrogen-rich fuel gas. The method comprises the following steps: crushing the collected kitchen waste and waste plastics, and conveying the crushed material to a supercritical water gasification reaction kettle, wherein the reaction kettle is filled with nitrogen gas; heating and pressurizing the reaction kettle by using an electric heater to 420 DEG C and 23-25 MPa, respectively; performing a reaction continuously for 40-60 min, and stirring the material at the rotation speed of 100-150 rpm byusing a magnetic stirrer; after the reaction is completed, cooling the reaction kettle to room temperature by using cooling water; and collecting the high-quality hydrogen-rich fuel gas by using an air pump, drying the gas, and performing storage. The method can realize the efficient treatment of the kitchen waste and the waste plastics; the synthesis gas produced by the kitchen waste and the waste plastics combined with supercritical water gasification has a high hydrogen concentration and high quality; and the secondary pollution to the environment in the treatment process is greatly reduced.

The invention relates to a permanent-magnet separator for separating harmful heavy metal in soil. The permanent-magnet separator comprises a stander, hydraulic pumps, a plurality of permanent magnets and a material containing basin. The permanent-magnet separator is characterized in that a lifting plate is together supported by the hydraulic pumps on the stander, respectively, wherein the permanent magnets are designed on the lifting plate; a casing plate is fixed on the stander among the hydraulic pumps by virtue of a connector, a plurality of nonmagnetic metal casings are designed on the casing plate, and one permanent magnet is movably connected in each cashing pipe; the movable material containing basin is arranged at the bottom of the stander. Compared with the prior art, the permanent-magnet separator has the advantages that the structure is simple and scientific, the harmful heavy metal in the soil can be separated, and the permanent-magnet separator can be used for effectively separating the harmful heavy metal from the soil, the purposes of improving the soil, benefiting the environmental protection and the body health of people, realizing the utilization of waste and turning the waste into wealth are achieved, and the permanent-magnet separator is suitable for processing the soil severely polluted by heavy metal.

The invention relates to a method for treating an organic waste gas by using a plasma fluidized bed. The method comprises the following steps: introducing the organic waste gas to be treated into a plasma device comprising the plasma fluidized bed and a high-voltage power supply; starting the high-voltage power supply; forming an athermal arc plasma from a cutter-shaped stainless steel electrode under the action of high voltage so as to convert air in the organic waste gas into an active gas with a great amount of active substances; degrading and mineralizing toxic substances in the organic waste gas; driving granular activated carbon inside a stainless steel net through undegraded toxic substances and degradation products to fluidize so as to form the plasma fluidized bed; enabling the granular activated carbon to adsorb toxic substances which are not degraded by the plasma, and degradation products so as to form a toxic substance accumulation area; on the other hand, enabling the active gases to activate the surface of the granular activated carbon and at the same time degrade and mineralize the toxic substances accumulated on the surface of the activated carbon, thereby completing modification and regeneration of the activated carbon. Due to double actions of plasma and the activated carbon, the purpose of purifying organic gases is achieved.