92results about How to "Avoid Pollution Hazards" patented technology

The invention discloses washing liquid used in the semiconductor industry to wash plasma etching residues. The washing liquid contains citric acid/citrate buffer solution, fluorides, macromoledular corrosion inhibitor, anti-freeze agent and solvent. The washing liquid can effectively wash the plasma etching residues during the process of manufacturing a semiconductor, have low etching velocity on nonmetals and metal substrates such as Si, SiO2, tetraethoxy silane silicon dioxides (PETEOS), low-medium materials, Ti, Al, Cu and so on, is safe and harmless to the environment and the human body, and has good application prospect in the microelectronic field such as washing of semiconductor wafers and so on.

The invention discloses a preparation method for manufacturing building board by utilizing mine tailing residue. The following raw materials are used by weight ratio: 30-75% of tailing residue and 25-70% of additive; brine with the weight percent concentration of 25-28% is utilized to stir the material into paste, the paste is placed into a mould to be rolled and moulded, and the tailing residue is one or more than one of gold slag, copper slag and ferrum slag. The invention utilizes tailing residue to produce building board, massive tailing residue is consumed, pollution harm of tailing discharge is solved, the produced building board has low cost and high strength, tailing residue can be made into various building boards by utilizing the technology, and various building section bars, stone pillar, brick and lattice prism used for historic building restoration as well as modern city sculpture, roman column pendant, external decorative wall, leisure chair, rail and sidewalk lattice brick can be cast.

The invention discloses a method for producing a biological fermentation compound fertilizer by fermenting organic waste water with glutamic acid, which mainly comprises the following steps: carrying out multiple-effect evaporation concentration on waste liquor fermented by glutamic acid, extracting mycoprotein, carrying out multiple-effect concentration, carrying out low-temperature spraying fluidized granulation (adding inorganic constituents), screening, and cooling to obtain the finished biological fermentation compound fertilizer product. The method can overcome the defect that organic substance constituents can be coked and decomposed at high temperature, causing secondary pollution on the atmosphere and soil pollution caused by carbides in the spouting granulation technique, and develops a creative way for realizing zero discharge of organic waste water.

The invention relates to a method for recovering and utilizing waste metal sludge. It is characterized in that the waste metal sludge can be recycled as renewable resources, which causes no pollution and avoids the harm for water resource and human environment brought from industrial solid waste deep bury. The method comprises adding hydrogen peroxide and potassium permanganate into waste metal sludge for oxidation, which combines with autoxidation to form metal powder that is suitable for extraction.

The invention discloses a passivating method for reducing bioavailability of cadmium in acidic cadmium polluted soil. The passivant adopted by the method is industrial waste which is obtained by recycling pulp alkaline liquor with hydrated lime in the paper mill. The industrial waste generally contains 0.8g/kg-3.0g/kg of effective silicon, 0.6g/kg-2.0g/kg of effective iron and 100.0mg/kg-400.0mg/kg of effective phosphorus. The passivating method of the invention has the advantages of resource conservation, environmental friend, low cost, simple operation and the like, and can effectively control the soil heavy metal pollution and reduce the bioavailability of cadmium in acidic cadmium polluted soil.

The invention discloses a paper pulp molding edge trimmer, which comprises a bed body and a transverse moving mechanism, a longitudinal moving mechanism, a lower die holder, a pressing down mechanism and an upper die holder which are arranged on the bed body; the lower die holder and the upper die holder are matched; when being combined, the lower die holder and the upper die holder form a containing cavity together for containing a paper pulp box to be edge-trimmed; the lower die holder is fixed on the longitudinal moving mechanism and can drive the same to longitudinally move; the longitudinal moving mechanism is arranged on the transverse moving mechanism and can drive the longitudinal moving mechanism and the upper die holder to transversely move; the lower die holder is fixed on the pressing down mechanism and can drive the lower die holder to move up and down. By adopting a mechanism drive manner, the pollution hidden danger existing in hydraulic drive is fundamentally avoided; the paper pulp molding edge trimmer is simple in structure, convenient to operate, thus ensuring the edge-trimming precision and stability of the paper pulp molding edge trimmer; the production cost is reduced while the production efficiency is improved.

The invention relates to a pure-natural pollution-free dry-mixed floor mortar, which is prepared from the following raw materials in parts by weight: 200 to 250 parts of cement, 710 to 750 parts of yellow sand, 40 to 70 parts of pulverized fuel ash, 0.5 to 2 parts of additive, and 20 to 30 parts of natural thickening agent, wherein the additive is hydroxypropyl methyl cellulose; the natural thickening agent is a mixture prepared from the raw materials in parts by weight: 20 to 30 parts of glutinous rice flour, 15 to 35 parts of egg white powder, 25 to 30 parts of clay soil powder and 15 to 30 parts of straw meal. The pure-natural pollution-free dry-mixed floor mortar has the advantages that the natural thickening agent is adopted, so that on one hand, the overall viscosity of the mortar added with water can be improved, and a series of problems of shrinkage crack, water seepage, sand strip, peeling deformation, low strength level and the like of a surface layer of a floor at the later stage are prevented; on the other hand, the mortar is pollution-free to a human body, and the problem that straw stalks cannot be utilized can be effectively solved; the materials can be effectively smashed through a rotary cutter disc, and a filter effect of a filter box is effectively improved through horizontally swinging the filter box in a reciprocating way.

The invention discloses regenerated catalytic powder prepared from an abandoned vanadium-based SCR (selective catalytic reduction) catalyst and a preparation method of the regenerated catalytic powder. The method comprises the following steps: first, adding alkaline liquor into an ash-removed and pulverized abandoned vanadium-based SCR catalyst, agitating an obtained mixture I, carrying out a reaction on the agitated mixture I, filtering and water-scrubbing a reaction product, afterwards, washing a filter cake to be neutral with acid liquor to obtain TiO2, next, adding a vanadium salt and a tungsten salt into the TiO2, uniformly mixing an obtained mixture II, and then roasting and ball-milling the obtained mixture II to obtain the regenerated catalytic powder of which the particle sizes D50 are equal to 1-20 microns; the powder contains the following components: 0.1-5%wt of V205, 80-98%wt of the TiO2 and 1-10%wt of WO3. The method provided by the invention removes agglomerated and inactivated vanadium and tungsten substances from the abandoned vanadium-based SCR catalyst through cleaning, then adds some active substances into the abandoned vanadium-based SCR catalyst again, carries out roasting and ball-milling, and not only solves the sintering agglomeration of active components, enables that the newly added active substances can be favorably dispersed, but also solves the problem that a catalyst cannot be regenerated due to the reduction of mechanical strength or fragmentation; further, the preparation method is succinct in process, easy to control in conditions, and suitable for large-lot production.

The invention relates to the technical fields of steel smelting and ladle metallurgy, particularly a fluorine-free sodium-free ladle covering agent. The invention aims to provide a fluorine-free sodium-free ladle covering agent which has the characteristics of strong basicity, strong reducibility, high absorption and inclusion capacity, favorable spreadability and excellent heat-insulating property; and the invention also aims to solve the problems of high melting point, low melting speed, low desulphurization capacity and poor use effect in the existing CaO ladle covering agent, and to overcome the defect of contamination hazard since the covering agent contains sodium oxide, calcium fluoride and the like. The invention is characterized in that the covering agent is prepared from the following components in percentage by weight: 40-80% of spodumene, 10-40% of lime, 2-15% of magnesite and 1-10% of carbon black.

The invention is a dry-hanging structure and a construction method for a building ceramic large plank curtain wall. The dry-hanging structure comprises a framework structure formed by a keel and a cross beam; the framework structure is installed on a wall via connection assemblies; three rows of holes are drilled by a specific back bolt machine on the back of the building ceramic large plank; each row has five hole positions and screwing back bolts are planted therein; hanging members are installed on reinforcing grooves; the reinforcing grooves are tightly installed on the building ceramic large plank by the back bolts; and the building ceramic large plank can be hung on corner connectors of the cross beam via the hanging members, so the building ceramic large plank can be installed. With the above structure and method, great anti-bending strength, stability and anti-vibration performance can be achieved; the dry-hanging structure is especially suitable for super-high building structures or structures having seismic requirements; stronger weather resistance is provided; a full-machinery mode lock is provided and base material interior can be deeply accessed; organic glueing material of various types can be unnecessary; and material aging and potential chemical material pollution can be effectively avoided; and long-lasting combination can be obtained.

The invention discloses a preparation method of a fluorescent brightener water solution for a detergent. The preparation method comprises the steps that (1) process water and a detergent surfactant are sequentially added into a stirring kettle according to the weight, and stirring is started; and (2) when the surfactant is completely dissolved, a powdery fluorescent brightener is added into the stirring kettle, and stirring is continued until the solution is homogenous and transparent. According to the invention, the homogenous and transparent water solution is prepared with the solubilization effect of the surfactant to the fluorescent brightener. During a production process, the brightener solution for one day use can be prepared once and can be stored in a high-level storage tank. An addition amount can be controlled through a meter, such that production operation is convenient, production efficiency is improved, and product quality is stabilized.

The invention relates to the water treatment field, particularly aims at solving the problems of a household antiosmosis pure water machine as follows: 1. only little drinking water can be produced and pure water can not be produced, tap water suffering double pollution and containing surplus chlorine is used for washing vegetables and cooking; 2. the produced pure water removes the mineral clearly, drinking the pure water for a long time is harmful to health: and 3. 3-5 cups of condensed water are discharged when producing 1 cup of pure water, thus causing serious waste of the tap water and disadvantages. The purpose related by the invention is achieved by replacing the pretreatment system of the antiosmosis pure water machine with a water purifier which can produce qualified pure water; and the core thereof is replacing a PP cotton fine filtration unit with a micro-filtration unit which can be recoiled in use.

The invention discloses an intraperitoneal hyperthermic perfusion chemotherapy instrument in operation, belonging to the technical field of medical instruments. The intraperitoneal hyperthermic perfusion chemotherapy instrument in operation comprises a heating device, a control device, a man-machine interaction device, a chemotherapy liquid collection bag, two adjustable speed peristaltic pumps, two T-junction dividers and a plurality of sensors, wherein the heating device comprises a heating plate and a heating bag, the heating plate and the heating bag are tightly stuck, the heating plate is connected with the control device to transfer heating temperature control information, and the inlet and the outlet of the heating bag are respectively provided with a temperature sensor. The invention has simple structure and convenient operation; the heating plate is utilized to carry out heat exchange so as to evenly heat, and the chemotherapy liquid is only sealed and circulated in the pipeline, which is clean and reliable; and the chemotherapy liquid collection bag can effectively collect and manage the chemotherapy liquid, and a DSP processor has precise temperature control and obvious curative effect.

The invention discloses a continuous material pyrolysis gasification device which comprises a spiral feeder, a microwave reaction cavity, a microwave generator, a first-stage rotating disc, a second-stage rotating disc, a hollow rotating shaft, a screening plate, a settling chamber, a residue storage tank and a spiral residue discharge device, wherein the spiral feeder is positioned at the upper part of the microwave reaction cavity; the microwave generator is arranged outside the microwave reaction cavity; the first-stage rotating disc and the second-stage rotating disc are arranged inside the microwave reaction cavity; the two stages of rotating discs are fixed through the hollow rotating shaft; the bottom of the microwave reaction cavity takes the shape of a ring and consists of a screening plate which tilts downwards; the settling chamber is connected below the screening plate; a gas product outlet is formed in the settling chamber; a non-screening plate part at the bottom of the microwave reaction cavity communicates with the residue storage tank below; and the residue storage tank is internally provided with a stirrer and communicates with the spiral residue discharge device. The continuous material pyrolysis gasification device is high in pyrolysis speed, high in gasification efficiency, high in gas product quality, capable of meeting requirements of synthesizing liquid fuel, and good in application prospect.

The invention discloses polypropylene crosslinking copolymer fiber concrete leaking stoppage paste which comprises earlier-stage leaking stoppage paste and later-stage leaking stoppage paste. The earlier-stage leaking stoppage paste is composed of the following components of, by weight, 3 to 5 parts of a composite filling agent, 4 to 5 parts of a composite reinforcement agent, 2.5 to 3 parts of sodium polyacrylate crosslinking copolymer particles, 5 to 6 parts of flax fibers, 0.5 to 1 part of saw powder and 80 to 85 parts of water. The later-stage leaking stoppage paste is composed of the following components of, by weight, 20 to 30 parts of silicate cement, 5 to 10 parts of sodium polyacrylate crosslinking copolymer particles, 5 to 15 parts of flax fibers, 15 to 20 parts of medium sand and 5 to 10 parts of water. According to the leaking stoppage paste, a bridge connection leaking stoppage method and a chemical leaking stoppage method are combined, leaking stoppage risks are reduced, the leaking stoppage effect is improved, and meanwhile cost is low.

The invention discloses a straw fiberboard. The straw fiberboard comprises, by weight, 50 to 60 parts of polyethylene resin powder, 30 to 35 parts of polyvinyl chloride resin powder, 20 to 22 parts ofstraw powder, 5 to 10 parts of calcium powder, 7 to 11 parts of ACR, 4 to 6 parts of a calcium zinc composite stabilizing agent, 0.5 to 0.6 part of polyethylene wax, 1 to 1.5 parts of stearic acid, 2to 3 parts of paraffin, 5 to 7 parts of magnesium oxide, 3 to 5 parts of magnesium chloride, and 16 to 20 parts of urea-formaldehyde resin. According to a preparation method, straw waste is taken asa raw material, and better combination with resin plastic is achieved without modification, so that full utilization of straw is realized, and the strength of conventional bamboo fiberboards is achieved. Straw powder high efficiency recycling is realized, and pollution on the environment by the conventional processing method of crop straw is avoided.

The invention discloses a modified biochar preparation method and the modified biochar. The modified biochar preparation method comprises the steps: sequentially carrying out air drying, drying, pyrolysis and crushing on biomass to obtain biochar; preparing a humic acid solution; putting the biochar and the humic acid solution into a flask, oscillating the flask to enable the biochar to load humicacid, and filtering out the solution after oscillation is finished to obtain a biochar and humic acid compound; carrying out a desorption experiment on the charcoal humic acid compound to obtain thecharcoal humic acid compound with stable load, wherein the modified biochar is a biochar humic acid compound prepared according to the preparation method of the modified biochar. According to the preparation method of the modified biochar provided by the invention, a strong oxidant or a metal oxide is not used for modification, so that the hidden danger of environmental pollution caused by chemical product modification is avoided.

The invention relates to a method and a device for making a plant fiber product with paper pulp by means of molding. According to the technical scheme, a method for moving a mold of a plant fiber molding machine up and down comprises the following steps: 1) while a plant fiber molding product is manufactured, fixing a vertical moving mold which can make up and down straight line movement at one end of a sliding column, or fixing the vertical moving mold at one end of the sliding column through a mold mounting plate, and driving the vertical moving mold to make up and down straight line movement through the sliding column which is positioned on an upper rack and is capable of sliding vertically up and down relative to the upper rack; and 2) connecting the sliding column with a weight balance block through a weight balance connecting line or a chain mounted on a fixed pulley in a span manner, rotationally positioning the fixed pulley or a sprocket on the upper rack, and tracking the weight balance block of the sliding column through the weight balance connecting line or the chain. The method and the device are high in guiding precision, short in forming cycle, stable in operation, high in output, and capable of eliminating hydraulic oil pollution of wet blanks.

The invention discloses a glass box liquid crystal filling opening sealing mechanism of a full-automatic leveling sealing machine for liquid crystal glass boxes and solves the technical problems thatthe rejection rate is high during wiping, dispensing and curing of a long-strip-shaped liquid crystal filling opening with existing liquid crystal glass box leveling and sealing equipment. The full-automatic leveling sealing machine for the liquid crystal glass boxes comprises a leveling seat box mechanism and the glass box liquid crystal filling opening sealing mechanism. When glass boxes are stacked in a leveling seat box, the leveling seat box is controlled to rotate to drive a servo and speed reducer (13), the leveling seat box is rotated by 45 degrees and is located in a tilt state, and the stacked glass boxes can be stacked orderly by a seat box front side positioning baffle (14). Wiping of overflowed liquid crystals (29) can be completed in a high-quality and proper strength mannerwithout deforming the glass boxes by controlling a wiping mechanism lateral movement servo motor (32) and a wiping head vertical movement servo motor (35). The mechanism operates stably and occupies small space, the dispensing and sealing accuracy is effectively improved and the potential risk of pollution of the liquid crystals is avoided.

The invention discloses a liquid lead-bismuth environment static soaking test device and test method. The device comprises a frame, a test kettle, a lifting device and a corrugated pipe, wherein the kettle opening of the test kettle is upward, the upper end of the corrugated pipe is connected with the frame, and the lower end of the corrugated pipe is in butt joint with the kettle opening; the output end of the lifting device is connected with the test kettle, the lifting device is used for driving the test kettle to do ascending and descending movement so as to change the height of the test kettle in the space, and when the test kettle does ascending and descending movement, the corrugated pipe is compressed or stretched along with the movement of the test kettle. The method is based on the device. With application of the device and the method, static soaking in the liquid lead-bismuth environment can be completed, and the device and the method have the characteristics of convenienceand safety in operation.