37results about How to "Solve the problem that easily causes secondary pollution" patented technology

The invention relates to a method for treating radioactive waste liquid in a nuclear power plant through electrochemical synthesis of ferrite. The method comprises the following steps: adding supporting electrolyte into the radioactive waste liquid in the nuclear power plant, and uniformly stirring to obtain a mixed solution; adding an alkaline solution into the mixed solution to adjust the pH, inserting electrodes, performing constant-temperature electrolytic synthesis, standing the mixed solution obtained after completion of a reaction, filtering, performing solid-and-liquid separation to purify the radioactive waste liquid in the nuclear power plant, and efficiently removing a precipitate through magnetic separation. By the method, through electrochemical synthesis of the ferrite, the ferrite is generated in the electrolytic process, soluble metal ions in the solution and the ferrite can form a stable ferrite coprecipitate and the ferrite coprecipitate is removed, so that radioactive element ions in the radioactive waste liquid in the nuclear power plant are efficiently removed; the method has the advantages of a simple process, convenient operation, unlikeliness in secondary pollution and the like.

An electromagnetic shielding optical window based on a graphene/transparent conductive film composite structure belongs to the optical transparent member electromagnetic shielding technology field, and organically combines the low-reflection and partial absorption microwave characteristics of the graphene mesh films with the strong electromagnetic reflection characteristics of the high-light transmission conductive films, thereby forming a multilayer structure. The transparent conductive films are used as the transparent reflection layers, and 1-6 layers of graphene films separated by the transparent mediums are used as the transparent absorption layers. By the structure, the radio frequency radiation can penetrate the transparent absorption layers repeatedly to be absorbed strongly, so that the strong electromagnetic shielding and low electromagnetic reflection characteristics are realized, and the visible light has a high light transmission rate by transmitting the multilayer structure once. The electromagnetic shielding optical window of the present invention solves the problem that a conventional transparent electromagnetic shielding method can not consider the low-electromagnetic reflection, the strong electromagnetic shielding and the high light transmission simultaneously, and has the characteristics of high light transmission, strong electromagnetic shielding and low electromagnetic reflection.

The invention provides a method for recycling and processing a waste liquid produced by a combined desulfurization and denitrification technology using steel slag as an absorbent. Firstly, solid-liquid separation is conducted on the waste liquid which absorbs SO2 and NOx and reaches a total salt concentration; then, after the separation, quick lime and/or slaked lime are/is added into the obtained liquid phase to adjust pH, and after filtration, the pH of the filtrate is adjusted to 5-7; the filtrate is introduced into a micro-nano bubble generator, nitrite in the filtrate is completely oxidized to nitrate, and by subsequent operations such as evaporation, concentration, crystallization, filtration, desiccation and the like, calcium nitrate products are obtained. The method is a subsequent process of a metallurgy-slug combined desulfurization and denitrification technology, and solves the problem that secondary pollution is caused by the waste liquid which is produced by the metallurgy-slug combined desulfurization and denitrification technology, the nitrite is completely converted into the nitrate, the complete utilization of the N element in the waste liquid is achieved, and the pure calcium nitrate products are obtained. Meanwhile, the calcium nitrate products reach national standards of industrial calcium nitrate and agricultural calcium nitrate, and have good application prospects.

The invention relates to a biogas slurry concentration and nutrient enrichment system for a large biogas project and an application method thereof. The system is mainly composed of a biogas slurry pretreatment device, a sand filtration device, an ultrafiltration device, a nanofiltration device, a reverse osmosis device, a low-temperature multiple-effect evaporation device, a sludge thickening tank, a screw pump, a horizontal centrifugation machine, concentration tanks and a slurry storage tank through connection. The application method of the system comprises the steps that biogas residues and biogas slurry produced from the large biogas project firstly pass through the pretreatment device to remove suspended matter in the biogas slurry, coarse filtration is performed through the sand filtration device, the biogas slurry passes through the two-stage ultrafiltration device respectively to obtain penetrated liquid and concentrated liquid, the penetrated liquid obtained after ultrafiltration passes through the nanofiltration device to obtain ionic liquid and concentrated liquid, then the biogas slurry concentrated liquid passes through the low-temperature multiple-effect evaporation device to obtain high-concentration biogas slurry concentration liquid. The costs for capital construction and equipment investment is effectively reduced, the area occupied by equipment is decreased, the equipment utilization rate is improved, the temperature requirement in the biogas slurry concentration process is low, energy is saved, the biogas slurry concentration and nutrient enrichment system is environmentally friendly, turns waste into wealth and is remarkable in application effect.

The invention relates to the technical field of organic exhaust gas recovery processing, particularly a method and a device for treating organic exhaust gas. The method for treating organic exhaust gas comprises the following steps: introducing the organic exhaust gas into a packed absorption column, and spraying the organic exhaust gas in the forward direction by using a spray header; passing the sprayed exhaust gas upward through a packing layer and secondarily absorbing the exhaust gas with a spray liquid which is downwardly sprayed to obtain a gas-liquid mixture; carrying out catalytic oxidation and microbial decomposition on the spray liquid through a catalytic biochemical reactor to form overflow liquor, wherein the overflow liquor passes through the packing layer and falls back to the bottom of the packed absorption column, so that the organic matters in the spray liquid are decomposed into CO2 and H2O or converted into small molecular substances; and demisting the gas-liquid mixture which is obtained after the spraying and absorption by the spray liquid and then discharging the mixture out of the packed absorption column. The method for treating organic exhaust gas integrates spraying and absorption, catalytic decomposition and microbial decomposition, can synchronously purify the organic exhaust gas and the spray liquid, and has the advantages of being simple and convenient to operate and high in purification efficiency.

The invention discloses centralized disinfection and storage equipment for nursing protective articles. The equipment comprises a collecting bin and a storage tank, an overturning type recycling mechanism is arranged above the collecting bin, a spraying disinfection mechanism is arranged in the collecting bin, and a containing storage mechanism is arranged below the spraying disinfection mechanism. The storage tank is arranged below the containing storage mechanism. A sealing door is arranged at the position, corresponding to the storage tank, on the side wall of the collecting bin. According to the equipment, waste is stored in a non-contact mode, secondary pollution is avoided, and the spraying disinfection mechanism is arranged in the collecting bin to conduct spraying disinfection on the medical care waste entering the collecting bin. The containing storage mechanism is arranged at the lower end of the spraying disinfection mechanism, the storage tank is arranged below the containing storage mechanism, sprayed and disinfected waste enters the containing storage mechanism to be extruded and then enters the storage tank to be temporarily stored, the structure is simple, and the storage effect is good.

The invention provides a conductive polymer-supporter composite material, which is composed of a conductive polymer material and a supporter material, wherein the supporter material is taken as the carrier, and the conductive polymer material is dispersed on the surface of the supporter material. The conductive polymer material can be one of polyaniline, polypyrrole, polythiophene, and ring/heteroatom substituted derivatives thereof. The composite material has a high specific surface area, can effectively avoid the agglomeration and adhesion among conductive polymer materials (polyaniline, polypyrrole, polythiophene, and the like), and has a high adsorption and reduction performance on recycling metal elements in wastes, and the metal recovery efficiency is effectively increased.

The invention relates to a biomass nanocellulose/nano transition metal oxide porous material, and a preparation method and application thereof. Nano transition metal oxide is loaded on the surface of biomass nanocellulose through non-covalent interaction. The biomass nano cellulose/nano transition metal oxide porous material has both adsorption and catalysis functions, and can be used as a recyclable adsorption and degradation material; when being used as an adsorption catalytic degradation material, the porous material has the advantages of high adsorption catalytic degradation efficiency, environment friendliness, excellent regeneration capacity, easiness in separation, recyclability and no repeated pollution, and has a considerable application prospect.

The invention discloses a primary filter system. The primary filter system comprises a sealed box body internally provided with a cavity, wherein a water inlet tube and a water outlet tube are respectively arranged on symmetrical side walls of the box body, one end of the water inlet tube and one end of the water outlet tube are communicated with the cavity, the water inlet tube is arranged above the water outlet tube, a clapboard is arranged in the cavity and is arranged between the water inlet tube and the water outlet tube, the top end of the clapboard and the top end of the cavity are in seamless connection, the side wall of the clapboard and the side wall of the cavity are in seamless connection, a clearance exists between the bottom end of the cavity and the bottom end of the clapboard, and a filter device is arranged in the cavity, is fixed with the wall surface of the cavity, is arranged right below the end head of the water inlet tube in the cavity, and is arranged between the clapboard and the water inlet tube. The filter system can filter the petroleum primarily by using the physical property of petroleum floating on water surface, thus not causing secondary pollution to the water body, and solving the problem of secondary pollution caused by existing method of treating petroleum contamination with chemical reagents.

The invention discloses a drinking water bucket convenient to use. The drinking water bucket convenient to use comprises a bucket body, a bucket top and a cleaning ball, wherein the bucket top and the cleaning ball are fixed to the bucket body; the cleaning ball comprises a sealing semi-ball made of rubber and a porous cleaning semi-ball, and a magnetic ball is arranged in the sealing semi-ball; a water outlet sleeve is arranged in the center of the bucket top; an iron sealing ring matched with the sealing semi-ball is arranged at the inner end of the water outlet sleeve, and two outer conducting plates are arranged at the outer end of the water outlet sleeve; a spiral coil is wound on the inner side of the water outlet sleeve; and the two ends of the spiral coil are located at the outer ends of the water outlet sleeve and electrically connected with the two outer conducting plates separately. The drinking water bucket convenient to use is simple in structure, convenient to use and practical.

The invention discloses an extraction method of an allelochemical substance resisting microalgae from ruppia maritima. Petroleum ether is adopted as a solvent, the allelochemical substance is extracted from the ruppia maritima, during extraction, the extraction operation is conducted on the ruppia maritima three times by adopting the petroleum ether at 15-30 DEG C according to the ratio of 1:10 (m:v), after the extraction operation, organic phase materials are mixed, through pressure reduction and concentration, an organic solvent is volatilized, and the allelochemical substance of the ruppia maritima is obtained; after dilution, the allelochemical substance is applied to algal inhibition. It is shown through an experiment result that the allelochemical substance extracted from the ruppia maritima by adopting the petroleum ether has an efficient inhibiting effect on microcystis aeruginosa, the addition quantity of the allelochemical substance is 90-200 mg/L, the rate of inhibiting the microcystis aeruginosa is 50-95%, and under the condition of the inhibiting rate after seven and a half days, the concentration of the allelochemical substance is 92 mg/L. After 30 days, the allelochemical substance can be naturally degraded and cannot cause secondary pollution to a water environment. The extraction method has the advantage of being simple, high in ecological safety and the like, and provides the scientific basis for inhibiting methods for cyanobacterial bloom by utilizing the allelochemical substance in the water environment protection field.

The invention discloses a medical sewing needle device. The medical sewing needle device comprises a shell, a hollow cavity arranged horizontally is formed in the shell, a hollow clamping mechanism with an opening at the upper end is detachably arranged on the shell, the clamping mechanism is communicated with the hollow cavity, a spring is fixed in the inner bottom of the clamping mechanism, multiple sewing needle box mechanisms are arranged in the clamping mechanism in sequence from top to bottom, the sewing needle box mechanisms are above the spring, one end of the shell is provided with anopening communicated with the hollow cavity, the other end of the shell is provided with a push rod mechanism, at least a part of which is in the hollow cavity, the sewing needle box mechanisms in the clamping mechanism can enter the hollow cavity under the elastic role of the spring, so as to push the push rod mechanism to push the sewing needle box mechanism out from the opening. The problem that no special tools for placing common sewing needles are designed, the sewing needles are exposed, thereby being easy to be contaminated for the second time in threading or needle change is solved.

The invention provides an enclosure device used for soil enclosure. The enclosure device comprises a steel structure ring beam, a plurality of steel pipe piles and a supporting ring, wherein the steelstructure ring beam is arranged in soil and with the upper surface flush with the surface of the soil, and the steel structure ring beam comprises two circular steel components which are concentrically arranged; the steel pipe piles stretch into the soil between the two steel components and are arranged along the ring surface of the steel structure ring beam to enclose a construction area; and the supporting ring is located in the construction area and with at least part of the outer wall connected with the side wall of each steel pipe pile. The construction area is effectively reinforced through the supporting ring, so that stability of the enclosure device is improved. The invention further provides a soil remediation method utilizing the enclosure device on the basis of the enclosure device. The enclosure device is used for enclosing the soil so as to remove the soil, so that the problem of secondary pollution easily caused by volatile pollutants, toxic and harmful gas, soil particles containing pollutants and raised dust in the excavation process is solved.

The invention discloses a medical high-efficiency filter capable of realizing secondary sterilization. The medical high-efficiency filter comprises an air inlet assembly, a sterilization assembly anda cooling assembly, a filter screen and blades of the air inlet assembly are installed in a first cavity and a second cavity of a supporting shell respectively, an air inlet pipe is connected to the supporting shell, a motor is connected to the blades, and the motor is started to rotate the blades so as to suck in air which is preliminarily filtered through the filter screen; the sterilization assembly comprises a connecting pipe, a sterilization cavity, a nozzle and a steam generation device, the sterilization cavity is communicated with the supporting shell through the connecting pipe, the steam generation device is communicated with the nozzle, the nozzle is located in the sterilization cavity, and the steam generation device generates high-temperature steam, so that air from the connecting pipe is subjected to high-temperature sterilization; the cooling assembly comprises a spiral pipe, an air outlet pipe and a cooling box, the spiral pipe is communicated with the sterilization cavity, the cooling box is arranged on the outer side, cooling liquid is arranged in the cooling box and can cool air, finally clean and sterile air is exhausted through the air outlet pipe, and secondary pollution is avoided.