1924results about How to "Avoid pollution" patented technology

Multi-purpose devices for capping fluid reservoirs and sanitizing accessible surfaces of fluid-transporting medical fittings (e.g., luer access valves) at risk of contamination with infectious agents are described, as are methods for making and using such devices.

The invention relates to a machine-manufactured natural sand grading adjustment system and a manufacturing method of natural sand. The discharging end of a feeding conveying belt is opposite to a feeding port of a steel-sand mixing hopper; the steel-sand mixing hopper is opposite to a discharging port of a tower-type steel-ball bucket elevator by a steel-ball feeding chute; a discharging port of the steel-sand mixing bucket is communicated with a feeding port of a machine-manufactured sand grading adjustment machine; a dust collecting cover of the machine-manufactured sand grading adjustment machine is communicated with a dust remover by a conveying pipe; a discharging port of the machine-manufactured sand grading adjustment machine is opposite to the feeding end of a discharging conveying belt; a first-stage electromagnetic steel-sand separator is arranged above the discharging end of the discharging conveying belt, and a discharging port of the first-stage electromagnetic steel-sand separator is opposite to the surface of a steel-ball particle-diameter control chute by a steel-ball discharging chute; the surface of a steel-ball particle-diameter control chute is provided with a steel-ball particle-size control section; the discharging end of the steel-ball particle-size control section is opposite to a feeding port of a thick-steel-particle ground groove; the discharging end of the discharging conveying belt is opposite to a finished-product conveying belt; a second-stage electromagnetic steel-sand separator is arranged above the discharging end of the finished-product conveying belt.

The invention relates to a method for reclaiming valuable elements through gradient chlorination of vanadium slag, which belongs to the technical field of chemical industry and is used for solving the problem of efficiently reclaiming multiple metal elements in the vanadium slag. The method is characterized by comprising the steps of proportioning raw materials, fractionating vanadium tetrachloride and vanadium oxytrichloride, fractionating ferric trichloride, fractionating titanium tetrachloride, chromium trichloride and silicon tetrachloride, collecting fractionation products, processing chlorination tailings and the like. By directly adopting the vanadium slag as the raw material in the method of the invention, the highly efficient and comprehensive utilization of vanadium-titanium magnetite resources is realized in one process; the valuable elements such as iron, vanadium, chromium, silicon, titanium and the like are enriched through gradient chlorination and selective separation, and the purifying process is relatively simple; closed circulation can be realized by using chlorine in the process and has no environmental pollution; and the whole flow is disengaged from an aqueous system, thereby water resources are saved, and meanwhile, the pollution of the traditional flow to the environment is avoided. The method of the invention has the advantages of short flow, high element yield, no pollution, high benefit and the like.

A gas turbine airfoil (1) with a pressure sidewall and a suction sidewall (6) comprises several internal cooling passages, through which cooling air flows, and several film cooling holes (7) that extend from the internal cooling passages to the outer surface (11) of the suction sidewall (6). According to the invention the film cooling holes (7) are oriented in the radial outward direction as well as toward the trailing edge of the airfoil (1). They each comprise a diffused section with sidewalls that are diffused in the radial outward direction, in the radial inward direction as well as toward downstream direction. Cooling air flowing through the diffused film cooling hole (7) onto the outer surface (6) of the airfoil (1) forms an air curtain preventing plugging of the film cooling hole by particles entrained in the hot gas flow.

A multiflavor beverage dispensing nozzle includes at least one water inlet; at least two syrup inlets; a main water flow path through the nozzle; and at least two syrup flow paths through the nozzle, one in fluid communication with each syrup inlet, each terminating in a syrup discharge port. In one aspect the water flow path is shaped to cause the water to discharge from the nozzle in a sheet form, preferably in an annular shape, and the syrup discharge ports include a syrup deflector shaped to cause the syrup to fan out as it exits the discharge port so that it impinges on the sheet of water. In another aspect the nozzle includes at least two secondary water flow paths that each divert water from the main flow path and discharge the diverted water through the at least two syrup discharge ports. A beverage dispenser utilizes a plurality of the multiflavor beverage dispensing nozzles incorporating one or both of the forgoing aspects. Optionally the dispenser also includes one or more dispensing nozzles for dispensing a favor additive, and may be equipped to dispense ice and even have an ice crusher so that it can dispense crushed or cubed ice.

The present invention provides a cellulose ester composition, containing 1 to 99% by weight of cellulose triacetate prepared by substituting hydroxyl groups of cellulose with acetyl and having a degree of substitution with acetyl, DSace, which satisfies the relationship: 2.7</=DSace</=3.0, and 99 to 1% by weight of a mixed fatty acid ester of cellulose prepared by substituting hydroxyl groups of cellulose with acetyl and acyl groups having three or more carbon atoms and having degrees of substitution with acetyl and acyl groups having three or more carbon atoms, DSace and DSacyl, respectively, which satisfy the relationships: (I) 2.20</=DSace</=2.95, (II) 0.05</=DSacyl</=0.80 and (III) 2.60</=DSace+DSacyl</=3.00.

This invention is to reduce the influence of a gas generated by an anodizing reaction. A silicon substrate (101) to be processed is horizontally held. A negative electrode (129) is arranged on the upper side of the silicon substrate (101), and a positive electrode (114) is brought into contact with the lower surface of the silicon substrate (101). The space between the negative electrode (129) and the silicon substrate (101) is filled with an HF solution (132). The negative electrode (129) has a number of degassing holes (130) to prevent a gas generated by the anodizing reaction from staying on the lower side of the negative electrode (129).

The invention discloses a stain-resistant and scrubbing-resistant colorful ceramic tile joint mixture which is prepared from epoxy resin, a curing agent and powder, wherein the powder comprises white cement, quartz sand, titanium dioxide, precipitated barium sulphate, gas phase silica, dye, ultraviolet light absorber and yellowing-resistant agent. According to the ceramic tile joint mixture, not only the problem of alkali return of the common cement-base ceramic tile joint mixture can be thoroughly solved, but also the joint mixture is convenient to construct, the redundant joint mixture can be washed by water, and the joint mixture is cured under room temperature, and is stain-resistant and scrubbing-resistant.

The invention discloses an environmental-friendly stone polishing device with dedusting and damping functions. The environmental-friendly stone polishing device comprises a first booster pump, a water storage tank, a slide clamping block, a filter layer, a second booster pump and a damping material layer. Water in the water storage tank is sprayed out of cleaning spray nozzles after passing through a first water guide pipe through the first booster pump to clean stone dust generated in the stone polishing process, and the situation that the stone dust flies apart to pollute the environment is avoided; the distance between the slide clamping block and a fixed clamping block can be controlled by adjusting the position of the slide clamping block in a slide groove; the filter layer is arranged and used for filtering the dust in sewage, and the filtered sewage is conveyed to the water storage tank through a second water guide pipe by further utilizing the second booster pump, and recycle of water resources is achieved; and the damping material layer is arranged and used for adsorbing vibration generated by a box during stone polishing, and a protective effect is achieved on the box.

The invention relates to bioactive mineral powder containing quasi-nanometer?particles, a preparation method and an application thereof in a dental treatment. The bioactive mineral powder comprises the following components by weight percent: 40 to 65 % of SiO2, 15 to 30 % of CaO, 15 to 30 % of Na2O, and 2 to 8 % of P2O5, and particle size thereof is less than 90[mu]m, wherein 0.1 to 20.0 weight percent of the quasi-nanometer?particles have a bore diameter in a range of 100 to 900 nanometer. The bioactive mineral powder containing the quasi-nanometer?particles provided by the invention can directly enter in and seal dental tubules, so as to shorten treatment time, increase sealing rate and then improve treatment effect.

The invention discloses a novel method for preparing silicon dioxide and active carbon from rice hull ash, in particular relatives to a novel method for preparing silicon dioxide and active carbon from rice hull ash obtained through thermal decomposition of rice hulls. Major raw materials of sodium carbonate react with the rice hull ash after high-temperature decomposition to generate sodium silicate solid, and a soluble glass solution and solid active carbon are obtained after water dissolution, so the one-step completion of the silicon dissolution and activation is realized. The soluble glass solution is carbonized for separating out the silicon dioxide, a sodium carbonate solution is obtained through filtration, and sodium carbonate solid is obtained through crystallization. In the whole preparation process, the sodium carbonate only performs the effect of a catalyst, so sodium carbonate has no consumption, can be in cyclic utilization, reduces the cost, and reduces the waste water discharge. In the silicon dissolution stage, carbon dioxide gas generated by the decomposition of the sodium carbonate is fixed with burning tail gas of the rice hulls to be used as precipitating agents for preparing the silicon dioxide through purification treatment, so the cost is reduced, the greenhouse gas discharge is reduced, and the cyclic utilization of the carbon dioxide is realized.

The invention discloses a preparation and purification process of quartz sand and quartz powder and products thereof. The preparation and purification process of quartz sand comprises raw quartz ore, rough separation, fragmentation, water separation, roasting, water fragmentation, soaking in oxalic acid or citric acid, dry grinding or wet grinding, high-gradient magnetic separation, classification, combined process washing, floatation, deionized water washing, special drying. The preparation and purification process of quartz powder comprises quartz sand flotation, ultra fine grinding (dry grinding or wet grinding ), combined process washing, high-gradient magnetic separation, electrostatic separation, deionized water washing, classification, special drying, and vacuum packing. The quartz sand and quartz powder produced with the process of the invention can not foam in the production of glass and chips, an optical fibre and an optical cable can not be broken, the glass does not have water streaks, and the application area is widened. The quartz sand and the quartz powder is suitable for being applied in the fields of monocrystal line silicon, chips, optical fibre and optical cables, war industry, fine chemistry industry and micro-electronics.

The invention relates to a fixation device with clamping jaws and with rods connecting the clamping jaws, said rods being adjustable axially and angularly for positioning relative to the clamping jaws and clampable in the desired position, and with fixation and retaining pins that are receivable in a clampable fashion in the clamping jaws. According to the invention, a fixation pin applicator can be connected in a releasable fashion to the clamping jaws. A fixation pin can be brought into a desired position by means of the fixation pin applicator.

The invention provides a kit for detecting the epidermal growth factor receptor (EGFR) mutation by a primer specific fluorescence polymerase chain reaction (PCR), in particular to the diagnosis of the EGFR gene mutation in tumor tissues and peripheral blood serums of tumor patients. Aiming at specific mutant sites relative to the curative effects of molecular targeted anti-cancer drugs, the kit is provided with a specific oligonucleotide primer sequence and a probe sequence, carries out fluorescence PCR detection respectively through a wild type PCR system and a mutation type PCR system on each sample to be detected and judges whether the samples have the mutation of EGFR19 exons and 21 exons or not through the magnitude of a difference value (delta Ct) of Ct values of two times of reaction. The kit can detect whether the specific sites of the EDFR have the mutation or not and can be used for the curative effect forecast of new molecular targeted anti-cancer drugs and the guidance of clinical individualized medicine application programs of the tumor patients.

This invention relates to an electromagnetic wave absorption material, which is a high molecular compound material compounded by mixing a polymer matrix of two phases or more than two and an electromagnetic wave absorbent, in which, the polymer matrix is composed of two or more than two kinds of incompatible polymers and the material has fine wave absorption performance.

The invention discloses an acellular corneal stroma and a preparing method for the acellular corneal stroma. The preparing method for the acellular corneal stroma includes the following steps: (1) placing a picked animal cornea into water, and carrying out vibration processing to enable the epithelial layer to fall off; (2) replacing the water with acellular reagents, and carrying out vibration processing, wherein during the period, the acellular reagents and the water are alternately used to enable stroma cells and endothelial cells to fall off; (3) adding dehydrating agents, and enabling the mixture to stand or carrying out vibration processing to obtain the acellular cornea; (4) cutting the acellular cornea to obtain the acellular corneal stroma, wherein the acellular corneal stroma only comprises a front elastic layer and a stroma layer. The acellular reagents contain NaCl and EDTA, and the dehydrating agents contain glycerin. By means of the preparing method for the acellular corneal stroma, corneal cell components and soluble protein which are prone to causing the immune response can be effectively removed, and the complete acellular corneal stroma only containing the front elastic layer and the stroma layer can be obtained.

Probiotic compositions that comprise one or more bacteria species in spore form, a thickener to form a stabilized suspension and to preferably act as a prebiotic, one or more acids or salts of acids, and optionally a water activity reducer. A system for delivering probiotic compositions by gravity feed or non-contact pump to a point of consumption by a plant or animal, preferably in conjunction with acidified drinking water, comprising a collapsible container with attachable tubing that prevent contamination of the probiotic composition within the container. Delivery may be actuated in response to a timer, motion detector, fluid level sensor, RFID tag, or other mechanism to periodically or continuously dispense a dosage of probiotic composition directly to the soil surrounding a plant or to the water or feed for an animal. A method for increasing beneficial bacteria in an animal's GIT comprises adding probiotics to acidified drinking water.

The invention discloses an energy-saving vegetable cleaning machine. The energy-saving vegetable cleaning machine comprises a cleaning machine body, a cleaning barrel and a circulating water pump. A cover plate is arranged on the upper surface of the cleaning machine body, the left end of the cover plate is fixedly connected with the inner wall of the upper side of the cleaning machine body through a rotating shaft, and a liquid inflow pipe is arranged at the right end of the upper side of the cleaning machine body. According to the energy-saving vegetable cleaning machine, a motor drives the horizontal cleaning barrel to perform overturning cleaning on vegetables, and the cleaning effect and the efficiency of the cleaning machine are improved. The vegetables are cleaned in the mode of ultrasonic cleaning and spray-washing of cleaning liquid, the cleaning efficiency is further improved, and it is guaranteed that the vegetables are clean and hygienic. Water in the cleaning machine is cyclically pumped into a cleaning water pipe by the circulating water pump to perform spray-washing on the vegetables, water resources are saved, using cost is reduced, the cleaning machine can freely and conveniently move, convenience and practicability are high, vibration of the machine body can be effectively reduced through springs, mechanical stability of the machine body is improved, and besides, working noise is low when the cleaning machine works.

The invention relates to a treatment method on surface of magnesium alloy, belonging to the technical field of chemical treatment technology of metal surface. The invention provides a method of surface treatment of magnesium alloy. The method comprises the main procedures as follows: the surface of magnesium alloy is polished, washed by alkali, then processed by fluorozirconate composite conversation film surface treatment fluid, and finally sprayed with thermoplastic acrylic acid inhalator paint to finish the surface treatment; The formation of chemical conversion film is the most important key process, fluorozirconate composite conversation film surface treatment fluid mainly contains aqueous solution formed by fluorozirconate, dihydric phosphate, phosphoric acid, ammonium bifluoride and film formation accelerators namely nitrobenzene sodium dulfonate, inhibitor sodium fluoride or sodium borate and the like, the chemical conversion film generated by treatment has better corrosion resistance, and has excellent adhesive force with subsequent organic coating, thus being capable of enhancing the anticorrosion ability of magnesium alloy. Furthermore, the treatment fluid contains no chromium compounds, thereby preventing hexavalent chromium ion from polluting the environment, thus being beneficial for environmental protection.

The invention relates to the field of domestic cleaning machinery, in particular to an electric dust collection type ceiling cleaning head comprising a cleaning box bottom, a lower adjusting motor, an upper adjusting motor, a suction fan, an eccentric wheel, a cleaning brush, dust-collecting holes, a vibrating motor, a cleaning head shell, a telescoping and direction-adjusting mechanical arm, and a push motor. The cleaning box bottom, a base portion and the telescoping and direction-adjusting mechanical arm are connected through hinges. The electric dust collection type ceiling cleaning head is remotely operated and uses an electric dust collection mode, and pollution by dust raised in ceiling cleaning is avoided; the use of the remote control mode leads to lower dust influence upon operators; the use of the telescoping and direction-adjusting mechanical arm allows furniture to be moved fewer times during ceiling cleaning; thus, the electric dust collection type ceiling cleaning head has the advantages that cleaning dust pollution is low, the operators suffer less dust hazard and using is facilitated.

The invention discloses a direct venous re-transfusion immune cell cryopreservation medium and application thereof. The direct venous re-transfusion immune cell cryopreservation medium is prepared from dimethyl sulfoxide, human serum albumin, dextran, hydroxyethyl starch, heparin sodium and other clinical medicinal level raw materials by optimizing the proportion of the dose of each raw material. In addition, the operation steps are simplified and the cryopreservation effect is improved by optimizing the cryopreservation method. On one hand, the potential risk of introducing an animal source antigenic substance in the cell treatment process is avoided, and on the other hand, the cryopreservation effect of immune cells is better than that of a conventional cryopreservation medium, thereby guaranteeing the safety and validity in clinical use. Two kinds of components are used for preservation, so that the cryopreservation medium can be preserved stably for a long time. The method disclosed by the invention is simple in operation, provides stronger operability for implementation of large-scale cryopreservation, and simultaneously provides a fundamental technical guarantee for implementation of immune cell treatment.

The invention relates to a burner with ignite needle protector, which comprises an internal mixing room, an external annular mixing room, an internal annular fire cover, an external annular fire cover and an ignite needle, wherein the invention is characterized in that: a protective cover covering the ignite needle is arranged above the ignite needle; the lower surface of protective cover has protrude needle at the position relative to the ignite needle; said protective cover can effectively avoid exploding ignite needle, and avoid ignite needle being polluted by dropped oil, to prolong its service life. The protrude needle and the ignite needle can both ignite, to improve the ignite speed and success rate.

The invention discloses an off-line visual programming method for a robot. The method comprises the following steps: S100, setting rotation angles of all shafts of the robot as constraint conditions for movement; S200, applying a camera to acquire images of a target; S300, applying the acquired images to extract the edge and vertex data of the target; S400, applying the edge and vertex data of the target to build a three-dimensional model of the target; S500, applying the three-dimensional model of the target to generate point cloud data of the target model; S600, acquiring the coordinate information of the storage position of a wafer through the robot; and S700, calculating related movement parameters of a robot motor according to the coordinate information of the storage position and the point cloud data and saving the movement parameters. According to the technical scheme, the robot can achieve automatic off-line programming to generate the motion trail of the robot according to the image information of the target without control of staff, so that the staff is far away from a workshop, and accordingly, contamination to the workshop is avoided.

The invention relates to a method for preparing a high purity rare earth metal and its apparatus, which is characterized in that a lithium thermal reduction-vacuum distillation combined technology is used for preparing the high purity rare earth metal. The method comprises the following steps: taking rare earth chloride as a raw material and lithium metal as a reducing agent, placing in a reaction container, in a reaction system, carrying out a liquid-liquid displacement reaction of lithium metal and rare earth chloride under the inert gas protection (the pressure is 0.1-0.5 MPa) and the temperature of 850-1100 DEG C, then vacuum-pumping the reaction system to 10<-1>-10<-3> Pa, wherein the temperature is controlled at 900-1200 DEG C, evaporating lithium metal and lithium chloride, separating slag and metal to obtain the high purity rare earth metal. The reaction apparatus is composed of a furnace cover (1), a communicating pipe (2), a collector (3), a furnace body (4), a thermal baffle (5), a reactor (6), a heating device (7), an inflation system (8) and a vacuum system (9). The invention has the advantages of short process flow, high yield of rare earth metal and low production cost; the purity of the prepared rare earth metal is high. The used apparatus is simple and is easy to enlarge, and is suitable for large batch of industrial production.

The invention relates to the technical field of medical equipment and particularly relates to a nucleic acid extractor. The nucleic acid extractor comprises a shell, a rack, a nucleic acid extracting module, a sample bin, a reagent region, a multi-pipette module and a single-pipette module, wherein a table board is arranged on the rack; the nucleic acid extracting module, the sample bin and the reagent region are arranged on the table board; the multi-pipette module and the single-pipette module are positioned above the table board; an X arm is arranged on the rack; a multi-pipette Y arm and a single-pipette Y arm are arranged on the X arm; the multi-pipette Y arm and the single-pipette Y arm slide along the X arm; the multi-pipette module is arranged on the multi-pipette Y arm and slides along the multi-pipette Y arm; the single-pipette module is arranged on the single-pipette Y arm and slides along the single-pipette Y arm. The invention provides the nucleic acid extractor which is simple in structure, capable of preventing cross contamination and small in difference.

The invention relates to a waterless dyeing method of dispersed dye, comprising: (1) taking an ionic liquid as a solvent where the dispersed dye is dissolved; (2) dyeing dacron according to an ionic liquid impregnating method and an ionic liquid hot melt pad dyeing method; and (3) recycling the ionic liquid and the dye by an alcohol or water distillation circulation method. The dyeing method and a formula are simple, and the operation is convenient; during dye bath, since no dyeing auxiliaries such as a dispersing agent and a high temperature leveling agent are needed, the problems of dyeing waste water caused by the dyeing auxiliaries themselves and the toxicity of a carrier are solved; and in addition, the ionic liquid in the residual dyeing liquid and the dye can be recycled.

An air conditioner is provided. The air conditioner according to an embodiment of the present invention includes: a base pan constituting a lower appearance: and a condensed water detector detecting the amount of condensed water collected on the base pan. The air conditioner according to another embodiment of the present invention includes: a base pan constituting a lower appearance; a blower unit provided at one side of the base pan to guide a flow of air; and a motor providing a fan with a rotational power, wherein a motor support supporting the motor is further installed on the base pan.

The invention discloses a production and preparation method of a selenium-rich biological organic fertilizer. The method comprises the following steps of: preparing materials; preparing a microbial compound inoculum; preparing a fermentation material; and carrying out biological fermentation. The method has the advantages that fermentation treatment is carried out on excrements of livestocks and crop straws, so that waste is changed into a precious resource; environmental pollution of the excrements is solved; the soil is improved; the preparation method is simple, good in effect and low in treatment cost; not only are a fermentation effect and the fertilizer efficiency improved, but also a selenium-rich effect is obvious by adding the microbial compound inoculum; a disease prevention effect also can be achieved; the economic benefit is also improved.

The invention relates to a zero water change sapling of Chinese prawn that is specific pathogen-free (SPF). The operation procedures are that: the first step is the preparation, mainly comprising the cultivation of seawater disinfectant treatment of sapling, the disinfection of such implements as sapling cultivation barrels and the cultivation of biological baits; the second step is the manual cultivation of parent prawns, roe collecting, larve selection and disinfection; furthermore, the alive baits and collected naupliuses are strictly pathogen tested by specific pathogen quarantine technique, and those with negative results are continuously cultivated; and then the breeding density of every genealogies is regulated, the environmental condition is manually controlled, and suitable and moderate quantity of animal and plant baits and qualified foodstuff are adopted according to the requirements of physicochemical environment and baits in different development phases. The invention has simple operation procedure, which is suitable for being applied to large scale sapling production, and the specific pathogen free rate of prawn sapling is as high as 100 percent, thus supplying SPF parent prawns and SPF saplings or highly healthy saplings for prawn cultivation enterprises.

The invention relates to a method for separating molybdenum and nickel from black shale containing molybdenum and nickel, belonging to the metallurgic-chemical technical field. The method is characterized in that the black shale containing molybdenum and nickel is crushed and ground and undergoes oxygen pressure leaching in a pressure pan by using diluted acids and oxidants, and leach solution containing molybdenum and nickel and leached mud are obtained after filtering; ammonium molybdate and nickel sulphate solution are obtained respectively after the leach solution undergoes extraction and back extraction by different back extraction agents. The method leaves out a calcining step existing in the conventional process, thereby avoiding the environmental pollution of gases such as SO2; by the oxygen pressure leaching, molybdenum and nickel in black carbonaceous shale containing molybdenum and nickel are directly converted and dissolved so as to generate molybdenum sulfate acyl((MoO2)SO4) and nickel sulfate(NiSO4) to enter the solution for enrichment, so that the method better realizes the separation and extraction of molybdenum and nickel and is a clean manufacturing technology with reinforced conversion; moreover, the principal process is not limited by changes of mineral compositions.