160results about How to "Avoid filter effects" patented technology

The invention relates to a magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentration. The technology is characterized by comprising the following steps of: feeding the magnetic hematite mixed type rough concentration into a closed-circuit grinding system; feeding first-section weak magnetism through primary classification overflow; feeding the concentrate of the first-section weak magnetism into a dehydration tank; feeding the concentrate of the dehydration tank into a fine sieve; returning the coarse-grain product on the sieve to the grinding system; feeding the fine-grain product below the sieve to second-section weak magnetism; mixing the tailings of the second-section weak magnetism with the tailings of the first-section weak magnetism and the tailings of the dehydration tank to obtain weak-magnetic separation tailings; concentrating the weak-magnetic separation tailings by a concentrator, and feeding into a first-section centrifugal machine for roughing; feeding the concentrate of the first-section centrifugal machine into a second-section centrifugal machine for selection; discarding the tailings of the first-section centrifugal machine; mixing the concentrate of the second-section centrifugal machine with the second-section weak-magnetism concentrate to obtain the final concentrate; and returning the tailings of the second-section centrifugal machine to the concentrator. The technology provided by the invention is simple and efficient, has low separation cost, a good effect and high concentrate grade and metal recovery rate, and realizes efficient utilization of resources.

A nonhygroscopic thermally stable aluminum hydroxide, which is particularly useful for the preparation of thermally stable and fire retardant laminates for printed circuit boards.

The invention discloses a centrifugation and pressure filtration double sludge dewatering method. The method comprises the steps: sewage is conveyed into a first rotary drum (2) through a pipeline, the first rotary drum (2) and a spiral pusher (3) are in differential rotation, sludge is thrown to the internal wall of the first rotary drum (2) under the action of centrifugal force, so as to form a solid layer, and a liquid layer is formed at the inner side of the solid layer by water; the sludge treated by a front-section dewatering device is conveyed into a second rotary drum (7) of a rear-section dewatering device, a plurality of chambers are formed between a spiral press filter (8) and the second rotary drum (7), spiral pressure filtration blades (8.2) are made from elastic materials, high-pressure fluid is introduced into the spiral pressure filtration blades, so as to expand the spiral pressure filtration blades, and the expanded spiral press filter rotates and extrudes the sludge. According to the centrifugation and pressure filtration double sludge dewatering method, the front-section dewatering device is mainly used for filtering moisture out of the sewage by means of centrifugation, and the rear-section dewatering device is used for carrying out further treatment on the sewage by means of centrifugation and pressure filtration, so that continuous operation can be carried out, the production efficiency is high, and the moisture content is low after dewatering.

The invention discloses a deep dehydrating method of sludge. The method comprises the following steps: conveying sewage to a first rotary drum (2) through a pipeline, wherein the first rotary drum (2) and a spiral propeller (3) rotate differentially; under the centrifugal effect, throwing the sludge onto the inner wall of the rotary drum (2) to form a solid layer, forming a liquid layer inside the solid layer by using water and discharging the separated liquid; conveying the sludge treated by a front section dehydrating device to a second rotary drum (7) of a rear section dehydrating device, wherein a plurality of chambers are formed between a spiral press filter (8) and the second rotary drum (7), the chambers are sequentially reduced from front to back, and the spiral press filter (8) rotates and squeezes the sludge so that the sludge sequentially enters the chambers and the water content is continuously reduced. By adopting the method disclosed by the invention, the front section dehydrating device mainly filters water out of the sewage in a centrifuging manner and the rear section dehydrating device further treats the sludge in a centrifuging and press filtering manner, so that the method can be carried out continuously, is high in production efficiency and realizes low water content after dehydration.

The protein separating and purifying method includes twice extraction in polymer/salt double water phase system, and chromatographic separation with anionic exchange resin to obtain protein of molecular weight 10,000-30,000. The method can eliminate great amount of impurity and cell segment simultaneously, has the features of maintaining protein activity, short phase separating time, no residue of organic solvent, easy engineering amplification and control operation, and can eliminate endotoxin to affect product quality. The method of the present invention is especially suitable for the separation and purification of hepatocytokine.

The invention relates to a method for preparing an alpha-phenylethanol catalyst through hydrogenation of acetophenone and application. The catalyst contains copper oxide, zinc oxide, silicon dioxide and bismuth oxide. The method of the catalyst is realized by virtue of a sub-step precipitation method and comprises the following steps: precipitating zinc salt and a precipitator at a certain temperature, and aging, so as to obtain slurry (1); adding a mixed solution of copper salt and bismuth salt as well as the precipitator into the slurry (1), carrying out coprecipitation, and aging, so as toobtain slurry (2); adding carrier silicon into the slurry (2), and uniformly stirring and mixing, so as to obtain slurry (3); filtering, washing, drying and roasting the slurry (3), so as to obtain catalyst powder; adding a certain amount of pore forming agents into the catalyst powder, and carrying out piece formation; and carrying out secondary roasting on the formed catalyst, so as to obtain the final catalyst. The catalyst prepared by virtue of the method is large in pore volume and aperture, good in mass transfer property and heat transfer property and high in activity and selectivity.

The invention discloses vegetable and fruit food safety detection sample pretreatment and separation equipment in the technical field of food safety detection. The equipment comprises a mounting frameand a crushing device. The crushing device comprises a mashing box fixing plate fixedly connected to the top end of the mounting frame; a mashing box is connected to the mashing box fixing plate in asliding manner; a mashing box base is arranged at the bottom of the mashing box; the mashing box base is composed of two rotating plates and one supporting plate; the supporting plate is fixedly connected to the bottom of the mashing box; the two rotating plates are rotatably connected with the supporting plate; a servo motor is connected to the bottom of the supporting plate; and a rotating shaft of the servo motor penetrates through the supporting plate and is fixedly connected with a mashing blade; and the electric telescopic rod drives an overturning driving device to rotate so as to drive the filtering device to move. Through the arrangement of the structure, the to-be-detected sample remained on the filter plate can be cleaned, so that the to-be-detected sample can be collected morequickly and completely.

A hollow-core photonic crystal fiber gas cell and method for preparing the same. The hollow-core photonic crystal fiber gas cell comprises a single-mode fiber, a fiber splicing protection sleeve, a hollow-core photonic crystal fiber, and a photoelectric detector. One end of the single-mode fiber is fusion spliced with one end of the hollow-core photonic crystal fiber to form a fusion splice and seal one end of the hollow-core photonic crystal fiber gas cell. The fiber splicing protection sleeve covers and protects the fusion splice. The other end of the hollow-core photonic crystal fiber is processed into an output end by fusion sealing, and the surface of the output end faces, but is not parallel to, a detection surface of the photoelectric detector.

The invention discloses a common seepweed herb tea substitute, and relates to tea substitutes. The common seepweed herb tea substitute comprises common seepweed herb, germinated brown rice, chicory root and unripe tangerine peel. The prepared common-seepweed-herb germinated-brown-rice unripe-tangerine-peel tea is yellowish green and bright in color, and organically integrates aroma of tea and rice; the common seepweed herb tea substitute preserves natural aroma of the common seepweed herb and the chicory, and is added with fragrance of the unpolished brown rice. And thus, the common seepweed herb tea substitute is fresh, mellow and palatable in flavor, as well as aromatic and thick in tea soup. The common seepweed herb tea substitute has greatly increased nutritional values and flavor, andis very characteristic in tea aroma; moreover, the common seepweed herb tea substitute has fragrance of the common seepweed herb, the unripe tangerine peel and the rice, and contains water-soluble polyphenols of the common seepweed herb, rich amino acids, minerals, a large amount of vitamin B and vitamin E and the like. And thus, the common seepweed herb tea substitute is capable of eliminating stress so as to make people relaxed, conditioning the constitution, promoting blood circulation, increasing intestinal peristalsis, lubricating the intestines, relaxing the bowels, relieving inflammation, and moistening dryness; moreover, the common seepweed herb tea substitute has the functions of resolving food stagnation and strengthening the spleen and the stomach, and is capable of improving serum uric acid level of the human body. And thus, the common seepweed herb tea substitute is an ideal drink for people with hypertension and hyperlipidemia.

The invention discloses a preparation method of plastic-biomass active carbon and prepared active carbon thereof. The method comprises the steps of crushing and mixing raw materials, forming particles, activating, washing with acid and drying. Through the preparation method, waste recycled plastics, biomass materials and solid activating agents are prepared into plastic-biomass active carbon. Compared with the prior art, the preparation method of plastic-biomass active carbon has the advantages that a novel path of recycling and reusing urban and rural garbage, the water pollution caused by chemical reagents is greatly reduced, and the resources are saved; the prepared formed active carbon has a larger BET specific surface area and a high iodine sorption value, shows abundant pore structure and has a great market application prospect.

The invention discloses a novel sewage treatment system and a use method thereof, and belongs to the technical field of sewage treatment. A novel sewage treatment system comprises a mixing box, a filtering box and a water storage box, wherein the filtering box is communicated with the water storage box, the mixing box is communicated with the filtering box through a closing valve, a mixing mechanism is arranged in the mixing box, a cleaning mechanism is arranged on the inner wall of a connecting plate, and a filtering assembly is connected in the filtering box. The cleaning mechanism comprises a rotating assembly, a first connecting rod assembly and a second connecting rod assembly; the output ends of the first connecting rod assembly and the second connecting rod assembly are connected with a cleaning plate, the side wall of the mixing box is connected with a liquid inlet pipe, the side wall of the side, away from the liquid inlet pipe, of the mixing box is connected with an agent adding pipe, and the side wall of the water storage box is connected with a liquid discharging pipe. According to the sewage treatment device disclosed by the invention, a medicament and sewage can be fully and quickly mixed, and sediments of primary filtration can be cleaned and are conveniently collected and treated, so that low sewage treatment efficiency and poor filtration effect caused by primary filtration blockage are effectively prevented.

The invention belongs to the technical field of biological medicine, and particularly relates to anti-tumor angiogenesis polypeptide mPEG-Mal-Cys-AS16. The peptide comprises 17 amino acids, and the specific amino acid sequence is mPEG-Mal-CATWLPPRAANLLMAAS. AS16 is subjected to proper chemical modification through adopting polyethylene glycol, so that the purpose that the half-life period of the modified AS16 in an organism is prolonged is achieved. Experiments prove that compared with the original polypeptide AS16, the polypeptide mPEG-Mal-Cys-AS16 subjected to chemical modification provided by the invention has the advantages that the biological activity is well maintained, the polypeptide is prevented from being subjected to enzymolysis of a plurality of enzymes in the organism or being filtered by the glomerulus, and the half-life period of the polypeptide is prolonged well, so that better application value is achieved when the polypeptide is applied to tumor inhibition.

The invention discloses Sc2O3-stabilized ZrO2-based electrolyte powder and a preparation method thereof, and a Sc2O3-stabilized ZrO2 electrolyte ceramic wafer prepared from the powder. The Sc2O3-stabilized ZrO2-based electrolyte powder is characterized in that zirconyl nitrate, Sc2O3, optional CeO2, nitric acid, and optional auxiliary materials are used as the raw materials, an ammonium bicarbonate-ammonia buffer system is used as a precipitant, and the coprecipitation, mist spray and heat treating method is carried out to prepare the powder of which a bulk phase is a cubic phase. Such Sc2O3-stabilized ZrO2-based electrolyte powder has the advantage that the raw materials are low in price and nontoxic; the Sc2O3-stabilized ZrO2-based electrolyte powder can be prepared into a high-strength dense electrolyte ceramic wafer which has relatively high ionic conductivity stability and the like. Simultaneously, according to the preparation method of the Sc2O3-stabilized ZrO2-based electrolyte powder, follow-up complex processes such as filtering, washing and drying in the coprecipitation method are avoided, the agglomeration is reduced, the product purity is ensured, the process is simple, the process is continuous and efficient in process, and large industrial production is facilitated.

The invention relates to the field of electric furnace zinc smelting, and discloses a method of recovering zinc powder by utilizing exhaust gas generated by electric furnace zinc smelting. The method is characterized in that the exhaust gas output after primary cooling is subjected to secondary cooling, tertiary cooling, gravity storage and bag dust collection sequentially, and zinc in the exhaust gas is recovered gradually. The method is simple in technology and convenient to operate; a repeated smelting technology which requires sedimentation, refloatation, granulating, drying and furnace remelting in the prior art is avoided effectively, a large amounts of manpower and material resources are saved, electric energy, and substantive investment cost and production cost are also saved, the method is very environment-friendly, a recovery rate of zinc can reach above 99%, and the purposes of energy conservation and consumption reduction are achieved.

The invention discloses a filtration system for separation of whirlwind and dust storage, a hand-held vacuum cleaner and a rod-type vacuum cleaner. Through relatively independent arrangement of a duststorage chamber and a dust-air separation device, the dust-air separation device is unlikely to be blocked, the dust storage space of a dust cup is increased, and the dust collection amount is increased.

The invention discloses a preparation method of yttrium oxide stabilized zirconium oxide powder based on supercritical dispersion roasting. The method comprises the following steps: first, weighing zirconium salt and yttrium salt, mixing the zirconium salt with the yttrium salt to prepare a precursor material of the yttrium oxide stabilized zirconium oxide powder, and drying the precursor material; mixing the dried precursor material with a grinding auxiliary agent and a dispersing agent, grinding the mixture into the d10 being less than 100 nm and d50 being greater than 150 nm in a nano-sandmill; continuously conveying the ground slurry into a high-pressure kettle with the temperature being greater than 250 DEG C and the pressure being greater than 6.5 MPa through a metering pump, and spraying the slurry into a calcining furnace for combustion from an outlet, wherein the precursor is dispersed by the grinding auxiliary agent and the dispersing agent which are in a supercritical stateand is decomposed into the yttrium oxide stabilized zirconium oxide powder in the calcining furnace. The yttrium oxide stabilized zirconium oxide powder prepared with the method has small particle size, uniform particle size and nearly spherical morphology, and can meet the requirement of high-end application.

The invention relates to an integrated treatment method for sludge removal and sundry separation in riverway treatment. An integrated treatment method for sludge removal and sundry separation in riverway treatment is used in the method, and comprises a maneuvering ship body, a sludge suction mechanism and a separation group, the sludge suction mechanism is mounted at the upper end of the maneuvering ship body, the separation group is arranged at the left end of the maneuvering ship body, and the sludge suction mechanism is opposite to the separation group. The design concept of a structure combining sludge removal and impurity separation is adopted for carrying out integrated treatment of riverway treatment sludge removal and impurity separation, the dredging purpose can be achieved, and meanwhile, the function of river water suction and discharge circulation can be synchronously achieved, so the overall working efficiency of river dredging is improved, and meanwhile, the separation group is provided with a plurality of independent and recyclable impurity separation structures for improving the overall working load degree of the device.

The invention aims to provide a method for deeply purifying a supernatant and removing cadmium and cobalt in zinc hydrometallurgy. The method comprises the following steps of carrying out purificationand cadmium removal at the first stage, carrying out purification and cadmium removal at the second stage, carrying out purification and cadmium and cobalt removal at the third stage, and carrying out cooling and settling at the fourth stage. The method has the advantages that the deep cadmium and cobalt removal efficiency is excellent, the reaction temperature is low compared with that of a conventional process, so that the steam consumption is low, the cost is low, the usage amount of a purifying agent is small, the utilization rate is high, the cost is cheap, the reaction process is good in stability, the occurrence of the redissolving phenomenon of cadmium and cobalt impurities can be avoided, the amount of generated cobalt slag is small, the cobalt content is high, the subsequent resource utilization is greatly facilitated, the unit consumption of zinc powder in the purification process is remarkably reduced, and secondary pollution is not caused.

The invention discloses a sewage treatment device for a smart city, which comprises a base. The top of the base is fixedly installed with a physical treatment tank, a biological treatment tank and a chemical treatment tank in sequence from left to right. One side of the physical treatment tank is provided with a water inlet pipe. The inner cavity of the physical treatment box is fixedly installed with an impurity removal fence, and the impurity removal fence is located below the end of the water inlet pipe inserted into the inner cavity of the physical treatment box, and a filter box is fixedly installed inside the physical treatment box and under the impurity removal fence, the filter box The outer surface of the body is fixedly connected with the side wall of the physical processing box. In the present invention, through the cooperation of physical treatment tank, biological treatment tank and chemical treatment tank, the floating matter and water-insoluble tiny particles in urban sewage are removed through the physical treatment tank, and the bacteria and bacteria in urban sewage are eliminated through the biological treatment tank. Microbes, and finally remove the chemical pollutants in the sewage through the chemical treatment tank, thus achieving the effect of treating urban sewage.

The invention discloses a centrifugal pressure filtration sludge dewatering device. The centrifugal pressure filtration sludge dewatering device comprises a motor (1), a rotor drum (2) and a spiral pressure filter (3), wherein the spiral pressure filter (3) is arranged inside the rotor drum (2) and comprises a spiral shaft (3.1) and a spiral pressure filtration blade (3.2); the spiral shaft (3.1) is internally hollow and a sludge feeding channel (4) is formed inside the spiral shaft (3.1) and is used for feeding sludge into the rotor drum (2); a filter layer (5) and a drainage channel (6) are arranged on the spiral pressure filter (3); the drainage channel (6) is communicated with the rotor drum (2) through the filter layer (5); the spiral pressure filtration blade (3.2) and the rotor drum form a plurality of pressure filtration cavities (7); the pressure filtration cavities (7) shrink in sequence along the sludge moving direction. Through the centrifugal pressure filtration sludge dewatering device, the moisture content of sludge coming out from a sludge outlet meets the requirements, and the device can operate continuously, is high in production efficiency and ensures low moisture content of dewatered sludge.

The invention discloses resin for pultrusion of a carbon fiber composite material. The resin comprises 30%-60% of an epoxy resin system, 10%-30% of an unsaturated resin system, 2%-5% of a flexibilizer, 3%-5% of an internal releasing agent, 5%-10% of an active diluent and 3%-8% of chopped conductive fibers. The method can be used for pultrusion of the electromagnetic shielding carbon fiber composite material, meets the requirements of low reaction viscosity, high activity and good strength of a resin system in the pultrusion process, and can utilize the fiber conductive enhancer in the resin system to supplement the defect that the electromagnetic performance of the material is independently improved by the reinforced fibers. By optimizing the combination of the resin and combining with thepultrusion electromagnetic shielding carbon fiber plate, the effect that the shielding effectiveness is greater than 40dB under 150KHz-18GHz is achieved. Meanwhile, due to the particularity of the fiber conductive enhancer in the resin, the invention provides a pultrusion process method using the resin system.

The invention discloses a water supply and drainage device capable of displaying a water level and a water quality in multiple directions. The device comprises a water storage tank, a filter box is fixedly installed at the top of the water storage tank, a water adding pipe is fixedly installed at the bottom of the filter box and is in communication with the interior of the filter box, and the bottom end of the water adding pipe extends into the water storage tank; and a base is fixedly installed on the inner wall of the bottom of the filter box. The device is reasonable in design and good in practicability, water can be supplemented into the water storage tank through a water pump, water in the water storage tank can be discharged, the effect that one pump has two purposes is achieved, the equipment production cost is saved on, in the process of supplementing the water storage tank with the water, clean water can be filtered and purified and then discharged into the water storage tank, and thus the possibility that contamination particles enter the water storage tank is greatly reduced; and in the process of conveying the clean water through a water inlet pipe, the outer pipe wall of the water inlet pipe can be intermittently knocked to generate vibration, the scaling phenomenon of the pipe wall of the water inlet pipe is greatly reduced, and normal use of the water inlet pipe is guaranteed.

The invention discloses an air filtration device for textiles based on water-wet dust collection. The air filtration device comprises a device body, wherein the top of the device body is connected with a water tank, one side of the water tank is provided with a water level gauge extending into the water tank, and the inner portion of the device body is provided with a filter chamber, a sprinklingchamber, a drying chamber and a water purification chamber separately. The air filtration device for the textiles based on the water-wet dust collection has the advantages that a water falling port, afilter net, a circulating water pipe, a second water pump and the water purification chamber are also arranged, when a user uses the device to spray a gas, the sprayed water can flow into the water purification chamber through the water falling port, residue particles in water are purified and filtered through the filter net in the water purification chamber, after the water is purified and filtered, the user can start a second water pump, so that the second water pump pumps the purified and filtered water in the water purification chamber and transports the water into the water tank again soas to recycle the water, thereby avoiding the waste of a large amount of water resources.

The invention relates to the technical field of waste gas treatment equipment and discloses an energy-saving and environment-friendly waste gas purifying device and an operation method thereof. The waste gas purifying device comprises a filtering tank, wherein support legs are fixedly mounted at the bottom of the filtering tank, an air inlet pipe is fixedly communicated to the top of the filteringtank, a partition board is fixedly mounted in an inner cavity of the filtering tank, an air guiding pipe is fixedly communicated to the bottom of the partition board, a filtering tank is fixedly mounted in an inner cavity of the filtering tank, and an activated carbon layer is fixedly mounted in the filtering tank. According to the energy-saving and environment-friendly waste gas purifying deviceand the operation method, waste gas is guided into the filtering tank through the air inlet pipe, smoke particles and foul smell in the waste gas can be adequately absorbed by the activated carbon layer through the cooperation of the air guiding pipe and the activated carbon layer, so that waste gas treatment equipment is greatly simplified, the purification cost is saved, the problem of haze caused by directly exhausting the smoke particles into atmosphere is avoided, and the environmental protection function of the device is added.