44results about How to "Easy and efficient recycling" patented technology

The invention discloses a preparation method of a magnetic core-shell alginate microsphere adsorbent. The preparation method comprises the following steps: preparing two parts of sodium alginate solution, wherein one part is shell layer solution, and dichloromethane and nanometer ferroferric oxide are added into the other part and uniformly mixed to obtain nuclear layer solution; and respectively injecting the shell layer solution and the nuclear layer solution into the outer layer and the inner layer of a stainless steel coaxial needle head, jetting the shell layer solution and the nuclear layer solution into a receiving device filled with calcium chloride solution under high-pressure electrostatic jetting conditions by utilizing high-pressure electrostatic spinning equipment, stirring, filtering, then, immersing the microsphere in metal salt solution, stirring, filtering, and drying to prepare the magnetic core-shell alginate microsphere adsorbent. The magnetic core-shell alginate microsphere adsorbent has the adsorptive property of an alginate gel microsphere adsorbent to a part of anion and also has magnetic property; therefore, an adsorbing material is more convenient and rapid to recycle; the use recovery cost is reduced; the application range is enlarged; and the preparation method can be widely applied to anion adsorption concentration, settling separation and waste water treatment.

The invention discloses a method for strengthening biological phosphorus removal of sewage and recycling phosphate resources from sewage. The method is characterized in that mixed liquor containing phosphate with relatively high concentration at an anaerobic stage of a primary flow system is introduced into an intermediate sedimentation tank of a side flow system to carry out mud-water separation based on an inverted and conventional A2O system and an oxidation ditch system; then, liquid supernatant of the intermediate sedimentation tank is introduced into a chemical phosphorous removal reaction tank; ferric salt or aluminum salt is added into the reaction tank, so that phosphate reacts with iron ions or aluminum ions to form insoluble phosphate; and insoluble phosphate precipitates in a chemical precipitation tank are recycled, and liquid supernatant of the chemical precipitation tank is exhausted into an aerobic tank; and sludge of the intermediate sedimentation tank is separately exhausted into a sludge treatment tank, a follow-up aerobic tank or is returned to an anoxic tank according to an operation condition of the system; and part of phosphate in sewage on an anaerobic phase in the primary flow system is chemically recycled at side flow, so that burden of biological phosphorus removal of the primary flow system is relieved, biological phosphorus removal is facilitated, and phosphate resources in sewage are recycled.

The invention provides a method for recovering a byproduct silicon tetrachloride produced in the process of producing polycrystalline silicon. Ionic liquid is recycled, so that SiCl4 is conveniently and efficiently recovered, the recovery rate is over 97 percent, hazards caused by the byproduct silicon tetrachloride produced in the process of producing the polycrystalline silicon are eliminated, and the silicon tetrachloride is recycled; a series of 1-alkyl-3-methylimidazole ionic liquid is synthesized under the condition of microwave radiation, and the imidazole ionic liquid with stable property is taken as an absorbent to absorb the SiCl4 by using the characteristic that the ionic liquid adsorbs gas; and after the ionic liquid is subjected to adsorption saturation, SiCl4 gas is released from the ionic liquid by heating and vacuumizing, so that the aim of recovering the SiCl4 is fulfilled.

The invention relates to a parachloronitrobenzene hydrogenation reduction catalyst capable of being magnetically recycled and a preparation method. Prepared Fe3O4 nanometer magnetic particles and water-soluble cobalt salt are added into water; ultrasonic full mixing is performed under the protection of inert gas, a reducing agent is added, and a target product is obtained after full reaction under ultrasound. Relevant salts such as iron and cobalt which are rich in nature are adopted as a matrix, raw materials are easy to obtain, and the cost is low. The prepared catalyst can be recycled through an external magnetic field due to the fact that the catalyst contains the Fe3O4 nanometer magnetic particles. The grain size of the prepared catalyst is 5-30 nm, so that the specific surface area can be 100-180 m<2>/g, and thus extremely huge promoting effects can be achieved on reagent adsorption and dispersion in the catalytic reaction process, and finally the conversion rate and selectivity reach 100%. The preparation method is simple, low in energy consumption, environmentally friendly and suitable for industrial production.

The invention relates to a ship for comprehensively cleaning crude oil leaked on water. The ship comprises a connection ship main body, a crude oil adsorption device, air separation devices, primary swirler separation devices, and secondary capillary electrophoresis separation devices. The connection ship main body comprises a left ship body and a right ship body, an oil storage cabin and a machinery cabin. Oil containment booms are arranged on the front parts of the ship body respectively; the crude oil adsorption device comprises a floating oil adsorption head, an oil conveying pipe and an oil pump. Each air separation device comprises a main tank body, a demulsifier feeding port, a top air release valve, a liquid level sensor, a crude oil and seawater mixed liquid inlet, a secondary separation liquid inlet, and a mixed liquid outlet. Each primary swirler separation device comprises a primary swirler, a primary swirler input pump, a secondary swirler, and a secondary swirler input pump. Each secondary capillary electrophoresis separation device comprises a high-pressure demulsification electric field and a capillary electrophoresis separation device. The ship has the advantages of high working performance, safety, and environment-friendliness; and mechanization operation does not have any polluted and harmful effect on a human body.

The invention discloses an iron scrap filter bed, which comprises a mesh surface filter bed, wherein filter paper is put on the surface of the filter bed; one end of the filter bed is provided with a water squeezing roller and an electromagnetic roller which are arranged in parallel, are in extrusion contact and are in reverse rotation; the water squeezing roller is arranged on a liquid outlet side of a liquid tank above the filter bed; the electromagnetic roller is provided with a scraper on the side away from the water squeezing roller; a scraper edge is abutted against the electromagnetic roller; the scraper is downwardly and obliquely arranged; both the water squeezing roller and the electromagnetic roller are connected with a motor through a belt conveying device; the water squeezing roller rotates clockwise; the inner surface of the electromagnetic roller is provided with an electromagnet; the electromagnet is connected with the motor; the surface of the water squeezing roller is provided with plush fabric; a tail liquid inlet pipe is arranged on the side wall of the liquid tank; a liquid convergence tank is arranged below the filter bed; and a liquid discharge pipeline is arranged on the bottom surface of the liquid convergence tank. According to the iron scrap filter bed, iron scraps can be continuously and automatically recovered, and the collection efficiency is high.

The invention relates to a submerged-arc welding flux recycling and sorting mechanism which comprises a supporting frame, a hopper is arranged on the supporting frame, a first-stage filter screen and a second-stage filter screen are sequentially arranged in the hopper from top to bottom, and a bearing plate is arranged below the second-stage filter screen; and the second-stage filter screen comprises a first inclined part and a second inclined part which are symmetrically arranged and downwards inclined towards the two sides, a gap is formed between the lowest position of the first inclined part and the inner wall of the hopper, and a gap is formed between the lowest position of the second inclined part and the inner wall of the hopper. The submerged-arc welding flux recycling and sorting mechanism has the characteristics that the welding flux can be simply, conveniently and efficiently recycled and reused, classified screening of the welding flux is simple and effective, and time and labor are saved.

The invention discloses a method for producing a polymeric phosphorus-containing compound fertilizer by using citric acid-soluble phosphorus slag, and relates to the technical field of polymeric phosphorus-containing compound fertilizer production. The method comprises the following steps: uniformly mixing citric acid-soluble phosphorus slag with phosphoric acid to prepare slag slurry with the solid content of 30-70%; adding urea into the slag slurry, heating to 80-130 DEG C, and stirring to react for 45-90 minutes to obtain neutralized slurry; adding a potassium source into the neutralized slurry, heating to 130-250 DEG C, and carrying out synthetic reaction for 30-150 minutes to obtain an initial product of the polymeric phosphorus-containing compound fertilizer; and cooling and crushing the initial product, and granulating to obtain a granular polymeric phosphorus-containing compound fertilizer finished product. The water-soluble P2O5 in the obtained finished product accounts for more than 75% of the effective P2O5 content, the polymerized P2O5 accounts for more than 35% of the effective P2O5 content, and the pH value of the product is 6-8. The method is simple in process, high in operability, free of waste in the process and environmentally friendly, and provides an effective way for efficient recycling of the citrate-soluble phosphorus slag.

The invention discloses a trimethylgallium on-line analysis device and an analysis method thereof. According to the trimethyl gallium on-line analysis device and the analysis method thereof, continuous multiple sampling can be carried out, sample recovery is convenient and efficient, pretreatment can be carried out on a pipeline before analysis requirements, the result can be completed within one hour, a sampling bottle does not need to be disassembled, tail gas receiving is also convenient, post replacement is carried out on the analysis result, and interference on subsequent analysis is avoided. The device is provided with a plurality of lines and a plurality of valves, a plurality of process lines are combined, a plurality of analysis pipelines are connected in parallel, and on-line sample analysis of the process lines can be carried out in a short time, so that seven functional steps of pre-replacement, blank test, sampling, analysis, tail gas receiving, sample recovery and post-replacement can be realized.