32results about How to "Control evaporation rate" patented technology

The invention provides a device and a method for continuously producing a solution coating of a polymer ultrathin sub-nanofiltration composite membrane filter cartridge. The device comprises a transmission system, a computer-controlled system, a solution spraying system and a drying system, wherein the transmission system consists of a material roller, a support coating conveyer belt and transmission rollers in a plurality of drying boxes; the material roller is connected with the support coating conveyer belt through a porous carrier layer raw material sheet; the support coating conveyer belt is connected with the transmission rollers in the drying boxes through a wet high-breathability polymer ultrathin sub-nanofiltration composite membrane sheet coated with the coating solution; a coating opening of a coating solution spraying device of the solution spraying system is arranged by facing to the upper surface of the support coating conveyer belt; the drying system comprises drying boxes with controllable temperature gradients and a preheated nitrogen purging system; a nitrogen output pipe of the preheated nitrogen purging system is communicated with nitrogen inlets of the drying boxes with controllable temperature gradients. The device and the method have the advantages of simple and convenient process, low equipment investment cost, high production efficiency and good quality of finished products.

The invention provides an adsorption carrier for an evaporation material for evaporation of an anti-fouling film. The adsorption carrier is a sintered body of metal powder, and the metal powder is one or a metal mixture of at least two selected from iron, stainless steel, copper and aluminum. The adsorption carrier provided by the invention has the advantages that the adsorption carrier does not contain impurities and can ensure that the impurities can not be produced by melting during the film plating process under high-vacuum and high-temperature conditions, and the adsorption carrier can not perform chemical reaction with the evaporation material which is adsorbed and carried by the adsorption carrier; a sintering raw material with appropriate heat conductivity can be selected according to the demands of film plating equipment, so that the uniformity of film plating is ensured; and the anti-fouling film which is obtained by using the adsorption carrier provided by the invention to perform vacuum evaporation can greatly improve the wear resistance and is better than the anti-fouling film which is obtained by evaporation by using the adsorption carrier in the prior art.

The invention discloses a superconducting magnet liquid helium container comprising a vacuum chamber. The superconducting magnet liquid helium container comprises a liquid helium storage tank and an outer cold screen. The liquid helium storage tank is disposed within the outer cold screen; a vacuum layer is provided between the liquid helium storage tank and the outer cold screen; a main bobbin, a shielding bobbin and the vacuum chamber are provided in the liquid helium storage tank. The superconducting magnet liquid helium container has the advantages that operational safety and stability of magnets can be guaranteed, required usage of the liquid helium is less, the cost is lowered, and liquid helium evaporation is effectively controlled.

The invention belongs to the technical field related to nano-semiconductor materials, and discloses a two-dimensional Cd 7 Te 7 Cl 8 o 17 A crystal material and a preparation method thereof, the method comprising the following steps: (1) dividing the reaction zone of a horizontal tube furnace into an upstream low temperature zone, a central temperature zone and a downstream deposition zone, and separating cadmium chloride, tellurium powder and selenium powder Placed in the upstream low temperature area as a precursor; (2) Cadmium chloride, tellurium powder and selenium powder react to generate Cd 7 Te 7 Cl 8 o 17 After crystallizing the material, the Cd 7 Te 7 Cl 8 o 17 The crystalline material is brought into the downstream deposition zone to be deposited on the substrate located in the downstream deposition zone, resulting in two-dimensional Cd 7 Te 7 Cl 8 o 17 crystal material. The present invention uses selenium powder as an oxidant to promote the generation of Cd 7 Te 7 Cl 8 o 17 reaction, to avoid the generation of by-product cadmium telluride, and to realize the controllability of the preparation process. At the same time, the present invention arranges the substrate in the downstream deposition area and keeps a certain distance from the central temperature area, which can avoid the damage of the substrate due to excessive temperature in the central temperature area. end.

The invention relates to a preparation method of a PbTe colloid nanocrystalline self-assembly film driven by constant temperature, constant pressure and constant load air flow, belonging to the field of preparation of ordered nano films by using rheotaxy, and the ordered nano film material is an important material for the development of new technologies of electronics, information, biology, and the like. The method comprises the following steps of: dispersing colloid nanocrystalline in a constant temperature, constant pressure and constant load air flow deposition device filled with a mixed solvent, wherein the colloid nanocrystalline is monodisperse PbTe colloid nanocrystalline prepared by adopting a colloid chemical method; driving the colloid nanocrystalline to carry out self-assembly by utilizing bath temperature and carrier air flow; assembling the colloid nanocrystalline on a Si wafer substrate to form a PbTe nanocrystalline film layer; and then clearing away residual liquid on the surface of the film by utilizing a high-speed film throwing technology. The thickness of the film layer can be effectively controlled through controlling the deposition time, and the prepared PbTecolloid nanocrystalline self-assembly film has uniform and consistent surface and is highly ordered. A tool in the invention for controlling solution evaporation has simple structure, low cost, simple and convenient operation and effective method.

The invention relates to a controllable evaporative micro-burner using waste heat of flue gas. The controllable evaporative micro-burner using the waste heat of the flue gas comprises a burner outer cylinder, an evaporation core is arranged on the inner surface of the lower end of the burner outer cylinder, an oil tank is formed between the evaporation core and the side wall of the burner outer cylinder, the evaporation core is internally provided with a steam channel, a steel wire mesh is fixedly installed on the upper end face of the evaporation core, and a flame lighter is arranged on the upper part of the steel wire mesh; a burning chamber is arranged on the upper part of the evaporation core, heat accumulators are fixedly installed on the positions, close to the inner surface of the side wall of the burner outer cylinder, above the burning chamber, the outer wall of the burner outer cylinder corresponding to the heat accumulators is the burner working wall surface, and heat pipesare fixedly inserted in the heat accumulators. According to the controllable evaporative micro-burner using the waste heat of the flue gas, it can be ensured that the temperature of the burner workingwall surface is stable, the degree of fuel burning can be increased, and use of thermal energy is increased.

The invention discloses curtain coating micro dip coating continuous production equipment and a method of an ultrathin membrane polymer complex film, belonging to the technical field of chemical equipment and process. The technical scheme I is that the production equipment provided by the invention comprises a transmission system, a computer control system, a micro dip coating system, a drying system and a solvent recovery system; The technical scheme II is the curtain coating micro dip coating continuous production method of the ultrathin membrane polymer complex film provided by the invention. The equipment and the method provided by the invention have the advantages that the complex film is continuously automatically produced, the production efficiency is high, and the end product quality is good; the uniform and flawless complex film is produced, the temperature, resistance time and vacuum degree and the like of a vacuum drying oven are controlled, and the quality of the complex film is guaranteed; a solvent is recovered, the manufacturing cost is saved, meanwhile, the environmental pollution is stopped, and when output achieves a certain scale, the costs of the continuous production equipment and the method are lower than the batch processing costs.

The invention discloses production equipment and a method for batch casting and micro-dipping of ultrathin polymer composite film and belongs to the technical field of chemical equipment and process. The production equipment comprises a conveying system, a computer control system, a micro-dipping system, a drying system and a solvent recovery system. The equipment and the method are for intermittent production. The composite film produced by the equipment and the method is high in production efficiency, and the finished film is high in quality. In order to produce even and flawless composite film, evaporating speed of solvents in the polymer solution coating is controlled. Retention time and vacuity of wet film in a vacuum drier are controlled especially; the evaporating speed of the solvents in the polymer solution coating is controlled effectively; accordingly, the quality of the composite film is guaranteed. The equipment and the method also allow for recovery of the solvents, so that production cost is saved; meanwhile, environmental pollution is avoided.