71results about How to "Not easy to secondary pollution" patented technology

The invention provides an in-situ ecological restoration method for riverway polluted sediment. Three layers of plant ecological concrete are laid on riverway sediment at an upper layer, an intermediate layer and a lower layer; unfoamed plant ecological concrete with the thickness of 5-10 centimeters is laid at the lower layer and has an effect of preventing sediment pollutant from upwards releasing to an overlying water body; iron-aluminum oxides are added into the concrete; formed plant ecological concrete with the thickness of 10 centimeters is laid at the intermediate layer and has an effect of providing a carrier for growth of a submerged plant; activated carbon particle piles are distributed in the formed concrete layer; and the submerged plant is planted in the activated carbon particle piles; the formed plant ecological concrete with the thickness of 2-5 centimeters is laid at the upper layer; and the iron-aluminum oxides are added into the concrete. The in-situ ecological restoration method is simple and practical and is convenient in operation, plant ecological concrete bricks are covered on the riverway sediment, heavy metal in the sediment is prevented from entering the water body, a pollution way of a pollution resource is cut off, secondary pollution is difficult to generate, and the heavy metal in the sediment is absorbed by the submerged plant.

This invention relates to a method of using aluminium hydroxide sludge to produce aluminum-iron compound purifying agent, belongs to sewage disposal technosphere. This method mostly add waste pickle liquid containing iron to reaction tank, gradually add aluminium hydroxide sludge, at ordinary temperature whip for reaction, make aluminium hydroxide sludge by step dissolve and generate liquid compound aluminum iron purifying agent; after precipitation, supernatant liquid is finished product of liquid compound aluminum-iron purifying agent. This invention recycles waste vitriol or hydrochloric acid containing iron, in favor of environmental health.

The invention relates to a hospital formaldehyde pollution scavenger and its preparation method. The preparation method provided by the invention comprises the steps of: uniformly mixing nanometer bamboo charcoal or modified nanometer bamboo charcoal with raw materials according to the following weight percentage, adding 10-20% of water for complete infiltration, and carrying out vacuum drying at normal temperature, wherein the above components are concretely composed of, by weight, 30-60 wt% of nanometer bamboo charcoal or modified nanometer bamboo charcoal, 1-10 wt% of potassium permanganate, 30-60 wt% of alkaline aluminum oxide or magnesium hydroxide and 1-10 wt% of ammonium chloride. The invention belongs to the integrated technical field of environmental medicine, environment and human health and new materials. The product provided by the invention is mainly used to eliminate the harm of the formaldehyde pollution under special circumstances of hospitals, and is beneficial to protect the health of medical workers and patients.

The invention discloses a system and a method for treating soil contaminated with heavy metals. The system comprises a hydraulic conduction coefficient changing zone, a crushing and stirring device and a plurality of leaching and dehydrating devices, the crushing and stirring device is connected with the hydraulic conduction coefficient changing zone, and the plurality of leaching and dehydratingdevices are respectively connected with the crushing and stirring device; and a plurality of hollow square movable water tanks are arranged in the hydraulic conduction coefficient changing zone at intervals. The system and the method for treating soil contaminated with heavy metals can improve the soil leaching effect by changing the hydraulic conduction coefficient of the contaminated soil.

The invention discloses a method for efficiently degrading a polyvinyl alcohol material. The method specifically comprises the following steps: swelling PVA at normal temperature, heating and dissolving the PVA, and adjusting the pH of a dissolving solution to 3 to 5; under a condition of constant temperature of 40 to 90 DEG C, adding an oxidant and a catalyst drop by drop while stirring, and performing reaction for 1 to 5 hours; adding a sodium hydroxide solution into the degraded solution to adjust the pH of the solution to be 9 to 13, performing sedimentation and filtration, and recycling iron sludge. The method is easy to operate; the oxidant and the catalyst both are conventional medicines, wide in source and low in cost; by the improvement on the adding mode and the ratios of the oxidant and the catalyst, degradation of the polyvinyl alcohol material which is a waste solid is realized; the PVA is degraded into a small-molecular-weight organic matter which has the molecular weight less than or equal to 500 g/mol and is easy to degrade; the organic matter at the molecular weight level is easily subjected to further biological degradation, thermal cracking and the like and is easy to treat; and no secondary pollution is caused.

The invention provides a curing and stabilizing agent capable of reducing leaching toxicity of heavy metals in soil and a preparation method of the curing and stabilizing agent. The curing and stabilizing agent is mainly prepared from cement, sodium sulfide slag, ferrous chloride, phosphogypsum and an additive, can reduce the leaching toxicity of the heavy metals such as Pb and Cd in the soil, canpersistently and effectively cure and stabilize heavy metal pollutants in the soil, and has a good repair effect on the soil; a content of the available heavy metals in the repaired soil is significantly lower than that specified in the national standard; the heavy metals have low possibility of leaching; and the possibility of a secondary pollution phenomenon is low.

The invention relates to a purification method of phosphoric acid, which belongs to the technical field of phosphorous chemical industry. The technical problem to be solved by the invention is to improve the purity of the phosphoric acid, effectively remove impurities of anions and cations and obtain high-purity acid for preparing industrial-grade or food-grade phosphoric acid. The technical scheme of the invention is as follows: the purification method of the phosphoric acid adopts the three-chamber electrodialysis method and comprises the following steps: adding phosphoric acid solution to be purified in an anode chamber, adding acid solution in a cathode chamber, and adding ultrapure water or diluted phosphoric acid in an intermediate chamber; and carrying out electrodialysis under the action of a direct current electric field, leading phosphate radicals in the anode chamber to pass through an anion exchange membrane and enter into the intermediate chamber, leading hydrogen ions in the cathode chamber to pass through a cation exchange membrane and enter into the intermediate chamber, and finally obtaining the purified phosphoric acid in the intermediate chamber. The method can separate the phosphoric acid from impurities through the action of the attraction force of the electric field, the concentration difference diffusion and the selective permeability of the anions and the cations and obtain the purified phosphoric acid in the intermediate chamber, the process is simple, and the obtained product has good quality, thereby providing the new process for purifying the phosphoric acid.

The invention discloses a microbial preparation for mineralizing and consolidating zinc ions and an application method for the microbial preparation. The microbial preparation is prepared by compounding 1 liter of bacillus pasteurii liquid and 60 to 80 grams of solid urea, wherein the optical density (OD) of the bacillus pasteurii liquid is 1.2. The microbial preparation is mixed uniformly and sprayed in a metal zinc ion contamination region, wherein the application amount is based on the zinc ion contamination level; urea is added according to the molar ratio of the urea to the zinc ions of 1:1; and the bacillus pasteurii liquid is added based on the mass of the urea. Microorganisms are decomposed under the enzymatic action induced by urea to generate carbonate ions, so that the zinc ions in the solution can be effectively mineralized and consolidated. Environmental impact is low and secondary pollution is avoided.

The invention discloses an artificial zoogloea which comprises the following raw materials in parts by weight: a first polymer matrix, a second polymer matrix, a third polymer matrix, a zoogloea framework, a toughener, a first adsorbent, a second adsorbent and the balance of deionized water. The artificial zoogloea has the advantages of stable properties, high degradation efficiency of organic pollutants, low sludge yield and low tendency to secondary pollution, and is applicable to high-concentration organic wastewater treatment, natural water body in-situ restoration and sludge treatment.

The invention provides a method for removing ammonia nitrogen in water through TiO2-NTs/Sb-SnO2/PbO2 electrocatalytic oxidation and an application of the method. According to the method, TiO2-NTs/Sb-SnO2/PbO2 is taken as an anode, a titanium sheet is taken as a cathode, an ammonia nitrogen target solution is introduced, Cl<-> is added, and then an electrocatalytic oxidation reaction is carried out. In the ammonia nitrogen target solution, the concentration of ammonia nitrogen is 20-40 ppm, and the concentration of Cl<-> is 1000-1500 mg/L. The TiO2-NTs/Sb-SnO2/PbO2 electrode has relatively high chlorine evolution efficiency, and Cl<-> can be oxidized on the surface of the TiO2-NTs/Sb-SnO2/PbO2 anode to obtain chlorine free radicals, hypochlorous acid and the like, so that most ammonia nitrogen can be converted into gaseous nitrogen, the content of total nitrogen in water is effectively reduced, the accumulation of NO3<-> is avoided, and the secondary pollution of a water body is further eliminated. The method for removing ammonia nitrogen through electrocatalytic oxidation is wide in reaction pH range and can be directly used for removing ammonia nitrogen in most natural water bodies and sewage, and the pH value does not need to be adjusted.

The invention discloses a sewage treatment method and a sewage treatment system. The treatment method comprises the following steps: adding an oxidant, a ferrous salt and an alkaline neutralizer to acidic sewage, carrying out a reaction, filtering the obtained sewage, adding sodium sulfide to the obtained filtrate, carrying out a reaction, carrying out press filtration, adding lime milk to the obtained filtrate, carrying out a reaction, and carrying out air floatation separation and post-treatment. The treatment system comprises an oxidation and neutralization reaction tank, a filter, a sulfuration reaction tank, a first filter press, a neutralization reaction tank and an air flotation device which are sequentially connected, and the first outlet of the air floatation device communicates with the oxidation and neutralization reaction tank. The treatment method and the treatment system have the advantages of high-efficiency treatment of acidic sewage with high content of heavy metals, respective enrichment of arsenic and other heavy metals, recycling and harmless utilization of hazardous waste residues, high recovery value and no secondary pollution.

The invention discloses a cleaning method for a high-light-transmittance glass screen of a smart phone or a tablet computer. The method comprises the following steps of performing negative ion blowing dust removal on the high-light-transmittance glass screen by using a negative ion fan; circularly cleaning with a weak base solution; performing ultrasonic washing; spraying and washing; air drying; performing drying; and removing steam at high temperature and low pressure. The negative ion blowing dust removal is adopted to remove positively charged dust attached to the surface of the high-light-transmittance glass screen, oil stains, sweat stains and other impurities can be effectively removed through cleaning with a weak base solution, fine impurities which cannot be observed by naked eyes are effectively cleaned away through ultrasonic washing and spraying washing, the high-light-transmittance glass screen can be effectively cleaned through air drying and drying, water mist on the surface of the high-light-transmittance glass screen is removed in a clean state, water vapor in a microscopic state of the high-light-transmittance glass screen is removed through high temperature and low pressure, so that a clean and dry screen is formed, a dust-free high-transmittance glass screen condition is provided for the smart phone or the tablet computer, and the fidelity of a visual effect is improved.

The invention discloses an environment-friendly powder metallurgy process with a wet separation technology, and belongs to the field of powder metallurgy technology. According to the environment-friendly powder metallurgy process with the wet separation technology, when metal waste is compressed and cut, the bonding strength between the metal waste and a coating or paint on the surface of the metal waste is reduced; through an ultrasonic cleaning technology, impurities which cannot be directly cleared away in the metal waste are taken out, the coating and paint on the surface of the metal waste are stripped by utilizing a cavitation effect formed by ultrasonic waves in an ultrasonic cleaning solution, and a metal material is not prone to be secondarily polluted, so that the metal waste with high purity is obtained, and then granulation and powder forming processes are performed; and the recycled metal waste can be separated through a wet method, and the coating, paint and various oxides on the surface of the metal waste are removed, so that the purity of the metal material is increased, and the situation that the performance of the recycled metal material prepared through powder metallurgy does not reach the standard is avoided.

The invention discloses a sausage processing method adopting superheated water assisted radio frequency sterilization. The method comprises the following steps: (1) adding a proper amount of side dishes into meat, and stirring to prepare meat stuffing; (2) preparing the meat stuffing into sausages; (3) pricking a plurality of holes in the sausage casing, then steaming the sausage, and naturally cooling and packaging the sausage; and (4) sterilizing the sausages by adopting a combined mode of superheated water and radio frequency sterilization, wherein the temperature of the superheated water is 110-120 DEG C, and the distance between the upper polar plate and the lower polar plate is 180-200mm, the heating time is 20-30 min, and the pressure of the sterilization kettle is 2-3 bar. On the basis of traditional sausage processing, meat is used as a main raw material, starch is preferably used as an auxiliary material, and collagen casings which are less used in food industrial production are introduced, so that the nutritional value of food is improved. On the basis of traditional radio frequency sterilization of the meat sausages, a high-temperature and constant-temperature water bath environment is used for assistance, and the defects that the geometric center of traditional superheated water is slow in temperature rise and low in sterilization efficiency are overcome, so that the temperature rise rate and the sterilization efficiency of the meat sausages are obviously improved on the basis of ensuring the heating uniformity.

The invention discloses a drug delivery flow control injector, and relates to the field of medical instruments. The injector based on a micro motor comprises an injection device used for outputting aninhibitor, a propulsion device used for extruding the inhibitor to be output to a needed part, and a storage device used for containing the inhibitor. The injection device is divided into a cutter head, a tip end, a fine needle and a needle tube from top to bottom; the reciprocating propulsion device comprises an internal micro motor, an external protective housing, a screw rod piece, a nut bodyand a piston; and a containing box is arranged in the storage device, so that medicine needed in a process of being injected into the human eyes can be quantitatively loaded. According to the invention, the quantitative medicine can uniformly cover the surface of the eyeball continuously in an operation, the conveying dosage can be better controlled by pumping force, the convenience of the operation is improved, the speed is controllable, the operation is sensitive, and the defects of low precision and difficult control caused by a manual pushing mode of a traditional injector at present can be overcome.

The invention discloses a washing machine. The washing machine comprises a box body, a rotary tub, a supporting shock-absorbing assembly and an impeller, wherein the rotary tub can be rotatably arranged in the box body, one end of the shock-absorbing assembly is connected with the lower portion of the box body, the rotary tub is supported by the other end of the supporting shock-absorbing assembly, and the impeller can be rotatably arranged in the rotary tub. The washing machine has the advantages of large capacity, saving water and environmental friendliness, secondary pollution resistance, strong stability, low noise and the like.

The present invention discloses a preparation method of a super-hydrophobic polylactic acid non-woven material. The method comprises the steps that in an adhesive coating solution, polylactic acid nanoparticles are used as a modification material for modifying the polylactic acid non-woven material to obtain the super-hydrophobic polylactic acid non-woven material. The invention simultaneously discloses the super-hydrophobic polylactic acid non-woven material prepared with the method. The super-hydrophobic PLA non-woven material prepared with the method has the selective oil absorption performance, the relatively good oil-water separation effect and the relatively strong mechanical property.

The invention discloses an automatic paving device for geotechnical materials. The device comprises a walking machine, a connecting mechanism, a paving frame, a compacting mechanism arranged on the rear side of the paving frame, an automatic paving mechanism arranged on the paving frame and an impurity discharging rubber pad arranged below the front side of the paving frame. The connecting mechanism comprises a fixing frame, a rocker arm and a plurality of obliquely-arranged supporting oil cylinders. The compacting mechanism comprises a plurality of adjusting combinations, a transverse steel plate and a compacting rubber pad; the automatic paving mechanism comprises a rotating shaft and a plurality of transmission combinations, the two ends of the rotating shaft are supported on the two sides of the paving frame respectively, and the transmission combinations are arranged on a plurality of oblique beams of the paving frame respectively and comprise motors, driving wheels and driven wheels. The whole laying process is mechanized in construction, a plurality of rolls of geotechnical materials can be installed according to the length of an operation face, continuous operation can be achieved without pause and replacement in the laying process, the walking machine can walk on various terrains, the laying requirement of the complex environment is met, and normal laying can be conducted on a road section with a large longitudinal slope.

The invention relates to a technical field of food grinding, mixing, stirring, blending, emulsifying, and beating, and specifically relates to a pickled vegetable manufacturing apparatus. The manufacturing apparatus comprises a cutting barrel, a rocking bar, a sector shaped cutting knife, a fixing base, and an L shaped rotary part; wherein the rocking bar, the sector shaped cutting knife, the fixing base, and the L shaped rotary part are arranged in the cutting barrel. The cutting barrel is provided with a material inlet, a material outlet, and a salt spraying opening. The internal wall of the fixing base is fixedly connected with the internal wall of the cutting barrel. One end of the rocking bar is hinged to the L shaped rotary part and performs circling motion along with the hinge point. The other end of the rocking bar is hinged to a connection bar, which is fixedly arranged on the bottom surface of the sector shaped cutting knife. The sector shaped cutting knife comprises an arc segment and a lateral wall, a blade is fixedly connected to the lateral wall, a rack is slidingly connected to the arc segment, and two ends of the arc segment are fixedly connected to stop blocks for preventing the rack from falling off. One side of the sector shaped cutting knife is provided with a gear engaged with the rack. The center of the gear is fixedly connected to a fixing rod. A stirring rod for stirring carrots in the cutting barrel is fixedly arranged on the fixing rod. The provided pickled vegetable manufacturing apparatus can carry out cutting and stirring at the same time.

The invention discloses a solar water boiler hung on a balcony. The solar water boiler comprises a support hung on the balcony. A tube-type heat collector, comprising multiple horizontally-arranged heat-collecting tubes, is mounted onto the support. The top end of at least one heat-collecting tube is internally provided with a water trap. Other heat-collecting tubes are internally provided with metal serpentine tubes which are connected to the bottoms of water traps. The water traps are connected with a heat-insulating water tank used for storage of boiled water. An exhaust pipe is mounted onto the upper surface of the above water trap. A temperature sensor used for detecting water temperature of the metal serpentine tubes is arranged at the upper portion of the metal serpentine tubes. The solar water boiler hung on the balcony has following beneficial effects: the solar water boiler is simple in structure and reasonable in design; a direct heating function of the metal serpentine tubes is used; a supplementary heating function of the above trap and an interrupted draining function of boiled water in the above water trap are utilized so that water quality of boiled water is ensured; and the mode of preparing hot water adopted by a conventional hot water boiler is changed.