36results about How to "Strong electrostatic adsorption" patented technology

The invention discloses a waste heat boiler dust removal device of a ferroalloy submerged arc furnace. The waste heat boiler dust removal device comprises a steel ball dust removal device and a solution cleaning device, wherein the steel ball dust removal device comprises a steel ball spreading device, a steel ball separating and collecting device, a material receiving device and a mechanical steel ball conveying device, the steel ball spreading device comprises a spreading and collecting hopper, air cooling spreading balls, a ball and dust separation screen and a dust box, the steel ball separating and collecting device comprises a conical collecting hopper, a dust and ball separation section and an air inlet pipe, and the solution cleaning device comprises a solution preparation pool, a water pump, a steel pipe, a rotary spraying nozzle and a material receiving device. According to the waste heat boiler dust removal device of the ferroalloy submerged arc furnace, the two dust removal devices are combined and supplement each other, the device structure is simple, operation is reliable, dust which is small in density, small in particle size, high in electrostatic adsorption capacity, large in specific area, and high in intermolecular adsorption capacity can be effectively removed, and the purposes that a waste heat boiler operates stably and dust is automatically and effectively removed are achieved.

The invention relates to a titanium dioxide doped carbon nitride and its preparation method and application. A preparation method of titanium dioxide-doped carbon nitride, comprising the following steps: adding carbon nitride to an alkali solution and ultrasonically treating the carbon nitride until the carbon nitride is uniformly dispersed to obtain a first dispersion liquid; adding the carbon nitride to the first dispersion liquid adding titanium dioxide and performing ultrasonic treatment until the titanium dioxide is uniformly dispersed to obtain a second dispersion liquid; and performing hydrothermal treatment on the second dispersion liquid to obtain titanium dioxide doped carbon nitride. The titanium dioxide-doped carbon nitride prepared by the above-mentioned preparation method of titanium dioxide-doped carbon nitride is applied to the lithium-sulfur battery separator, and carbon nitride and titanium dioxide can exert a good synergistic effect, and can have a strong adsorption effect on sulfur , inhibit the shuttle effect of polysulfides, and facilitate the redox reaction of sulfur, thereby improving the specific capacity and cycle stability of the battery.

The present invention proposes a preparation method of modified mussel shells, comprising the following steps: S1. preparation of magnetic nanoparticles; S2. pretreatment of mussel shells; S3. preparation of magnetic mussel shells: adding magnetic nanoparticles and ammonia water respectively Add the silane coupling agent dropwise to the deionized water, heat up to the reaction temperature, add mussel shell powder to react, cool down to room temperature, separate with magnet, and set aside; S4. Preparation of modified mussel shell: mix lactic acid, silane coupling agent and Add the magnetic mussel shells into deionized water, stir evenly, slowly add the catalyst solution dropwise, stir at room temperature, wash the product three times with deionized water and absolute ethanol, magnetically separate, dry, and grind to obtain the modified mussel shells . The modified mussel shell has good adsorption performance for methylene blue, the modification condition is simple, the operation is convenient, and it has strong operability. Using discarded mussel shells as raw materials has good environmental benefits and can produce good economic benefits.

Belonging to the technical field of graphite / metal phthalocyanine, the invention relates to a method for preparing a graphene / metal phthalocyanine compound composite material through electrostatic assembly. The method includes: combining graphene oxide with PDDA through electrostatic adsorption, and reducing the graphene oxide into graphene with a reducing agent so as to obtain a GR / PDDA composite material, which is then further combined with a metal phthalocyanine compound by electrostatic adsorption, thus finally obtaining the graphene / metal phthalocyanine compound composite material. In the invention, strong electrostatic adsorption exists between the graphene and the PDDA, and between the PDDA and a metal phthalocyanine derivative, self-agglomeration of graphene can be prevented, so that the metal phthalocyanine derivative can be evenly attached to the graphene surface.

The invention discloses an agricultural greenhouse composite film and a preparation method thereof, comprising the following steps: S01, preparing an outer reinforcing layer includes: preparing a mixed material for the outer reinforcing layer, and casting: putting the mixed material of the outer reinforcing layer into a reaction kettle, polymerizing Heating and melting after the reaction, the extruder extrudes the melt from the chilled roll to form a cast sheet, stretching: stretching the cast sheet to obtain an outer reinforcement layer, S02, preparing the anti-fog dripping layer includes: preparing the anti-fog flow The drop layer mixture includes the inner layer mixture, the middle layer mixture and the outer layer mixture. Blow molding: add the above three-layer mixture to the hopper of the three-layer co-extrusion blown film machine, extrude from the three-layer co-extrusion die, and the cooling fan Inflate and cool to make the anti-fog dripping layer, S03, use polyurethane adhesive to bond the outer layer of the outer reinforcement layer and the anti-fog dripping layer through a bonding machine to make a composite film for agricultural greenhouses, solve The problems of traditional agricultural membranes such as limited thermal insulation performance, weak strength, easy aging, and poor light transmission have been overcome.

The invention relates to a preparation method of an aluminum oxide-doped lithium titanate composite negative material, and belongs to the technical field of lithium ion battery negative materials. The preparation method comprises the steps of firstly preparing titanium dioxide turbid liquid, and keeping in a stirring effect; then adding soluble aluminum salt solution and aqueous ammonia into the turbid liquid, thus obtaining hydrated alumina sediment, keeping a pH value in a range of 7.1-9, and attaching the hydrated alumina to the surface of titanium dioxide via electrostatic incorporation; and at last after lithium salt is mixed with the titanium dioxide / hydrated alumina, preparing the aluminum oxide-doped lithium titanate composite negative material, Li(4+x)Al(x)Ti(5-x)O12, by using a segmented sintering method, wherein x is not more than 0.5 and not less than 0.05. According to the method provided by the invention, the purpose of restraining lithium titanate from producing gas is achieved by replacing a part of Ti<4+> ions on the surface with Al <3+> ions. The material is prepared by using the electrostatic adsorption method, and thus the acquired material is high in consistency, low in cost and prone to industrial production.

The invention discloses a method for preparing hemp stalk activated carbon, which belongs to the technical field of activated carbon preparation. The method of the present invention is as follows: roasting hemp stalks under the protection of nitrogen atmosphere, then lowering to normal temperature to obtain hemp stalk charcoal, grinding the particles to below 300 mesh; mixing hemp stalk charcoal granular carbon with tetramethylammonium hydroxide , and then heated and stirred for pretreatment to obtain pre-treated hemp stalk charcoal; mixed the processed hemp stalk charcoal with sodium ethylate, added water to stir and then carried out shock treatment under ultrasonic conditions, and roasted the obtained hemp stalk charcoal under the protection of nitrogen atmosphere, naturally Reduce to normal temperature; after activation, the hemp stalk is immersed in cationic guar gum solution and then washed to neutral with distilled water, dried, ground, and passed through a 80-200 mesh sieve to obtain the hemp stalk activated carbon. The activated carbon prepared by the present invention has higher adsorption performance than the activated carbon prepared by other methods.

The invention relates to a residual heat boiler of a steel ball dedusting type ore heat furnace. The residual heat boiler at least comprises a boiler heated surface, a seal boiler flue gas passage, a furnace top and a furnace bottom ash hopper, wherein the boiler heated surface comprises coil pipe groups; and the seal boiler flue gas passage is formed at the periphery of the boiler heated surface. The residual heat boiler is characterized in that the furnace top is provided with a steel ball spreading device, a steel ball separating and collecting device is arranged under the furnace bottom ash hopper; a circulating type steel ball mechanical transporting device is arranged between the steel ball spreading device and the steel ball separating and collecting device; the circulating type steel ball mechanical transporting device comprises at least one drive wheel, at least three driven wheels, a double-row chain, a horizontal guide rail, a steel ball transporting hopper and a mechanicaldischarge blocking wheel; the at least one drive wheel and the at least three driven wheels are fixed on a boiler frame, and the steel ball transporting hopper is hung on the double-row chain surrounded between the drive wheels and the driven wheels; and the furnace top is provided with the mechanical discharge blocking wheel capable of turning over the steel ball transporting hopper. The invention has simple mechanism, recycled steel ball, mechanical automation running, low investment and running cost and favorable dedusting effect, and the like, can effectively remove and collect accumulated ash and sticking dust on the residual heat boiler heated surface of the ore heat furnace and greatly develops the energy-conservation and emission-reduction technology of the ore heat furnace smelting industry.