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

The invention discloses a fast-growing wood drying method. The method comprises the steps that after to-be-dried wood is pretreated to obtain pretreated wood, the pretreated wood is dried according toordinary benchmark programs for wood drying, wherein the water content of the pretreated wood is 30-90%. The central temperature and surface temperature difference of wood in a wood stack is precisely controlled, the wet bulb depression in a drying room is adjusted, and the wood is dried according to the ordinary benchmark programs for wood drying after the wood is pretreated, so that high-quality dried wood is obtained. By means of the method, the water content gradient in the fast-growing wood drying process is reduced, and thus the treatment quality of the wood in the pretreatment processis guaranteed; then conventional drying is adopted, and compared with direct adoption of conventional drying, the wood drying method greatly improves wood drying efficiency, reduces drying stress, reduces drying defects and improves drying efficiency.

The invention belongs to the field of nanometer semiconductor materials, and discloses a non-layered two-dimensional PbSe crystal material and a preparation method thereof. The preparation method comprises the following steps: (a) selecting a reaction container, marking the reaction container as an upstream region, a central region and a downstream region, selecting Se powder as a selenium source,and placing the Se powder in the upstream region; (b) selecting Pb3O4 as a lead source, mixing the Pb3O4 with potassium chloride so as to obtain a precursor, then placing the precursor in the centralregion, and selecting mica as a growth substrate to be placed in the downstream region; and (c) introducing argon into the reaction container as carrier gas, introducing hydrogen as reaction gas, andcarrying out a reaction under heating so as to obtain the non-layered two-dimensional PbSe crystal material on the mica substrate. The invention also discloses a product prepared by using the method.The method provided by the invention meets the preparation requirements of large-batch two-dimensional nanometer PbSe crystal materials; a product crystal has the advantages of smooth and clean surface, uniform morphology, uniform element distribution, rich and cheap raw materials, simple preparation, and convenience in popularization and large-scale production.

The invention provides a greenhouse irrigation device capable of simulating vegetable water loss, and relates to the technical field of Internet of things equipment. The device comprises a fixed seat,wherein an electromagnet is fixedly connected to the inner wall of the bottom of the fixed seat; a resistor electrically connected with the electromagnet is fixedly connected to the inner wall of thebottom of the fixed seat; and a negative plate is fixedly connected to the inner wall of the right side of the fixed seat. According to the greenhouse irrigation device capable of simulating vegetable water loss, through the cooperative use of a variable resistance block and an electric heating block, when the device is used, a heat conduction block can conduct the temperature in a greenhouse toa bimetallic plate, so that the bimetallic plate is heated and bent downwards, the bending degree of the bimetallic plate can be adjusted according to the temperature, and as a result, the bimetallicplate points to different positions of the variable resistance block, the heating temperature of the electric heating block is controlled, the evaporation speed of water in a water tank is controlled,the water loss speed of plants at different temperatures is simulated, the speed of simulating the water loss of the plants is achieved, the irrigation efficiency of greenhouse planting is improved,and the yield of greenhouse planting is increased.

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 a method for preparing an efficient MA3Bi2I9 perovskite solar cell by controlling BiI3 film orientation through solvent evaporation induction, which comprises the following steps of: firstly, spin-coating a DMF (Dimethyl Formamide) precursor solution of BiI3 on a fluorine-doped tin oxide (FTO) substrate deposited with TiO2 to prepare a BiI3 film, and then, putting the prepared BiI3 wet film into a glove box room-temperature closed container; due to the sealing condition in the container, DMF evaporated from the wet film can generate a DMF atmosphere, so that the evaporation rate of the DMF is greatly reduced. By slowing down DMF evaporation, the product with preferred orientation (113) and (300) is successfully prepared; meanwhile, the (003) crystal face of the BiI3 film is weakened. Then, the prepared BiI3 thin film reacts with MAI to form an MBI thin film; the growth of the crystal face of BiI3 (003) is limited, and the crystal face of MBI (006) is also effectively limited, so that compared with a device prepared from an MBI film with preferred orientation of (006), the device is more beneficial to carrier transport.

The invention relates to a vapor deposition material composed of a two-component oxide of niobium and lanthanum, or a vapor deposition material composed of the two-component oxide and niobium metal and / or lanthanum metal. This vapor deposition material is characterized in that the molar ratio between niobium and lanthanum is from 25:75 to 90:10.

The invention discloses a fast-growing wood drying method. The method comprises the steps that after to-be-dried wood is pretreated to obtain pretreated wood, the pretreated wood is dried according toordinary benchmark programs for wood drying, wherein the water content of the pretreated wood is 30-90%. The central temperature and surface temperature difference of wood in a wood stack is precisely controlled, the wet bulb depression in a drying room is adjusted, and the wood is dried according to the ordinary benchmark programs for wood drying after the wood is pretreated, so that high-quality dried wood is obtained. By means of the method, the water content gradient in the fast-growing wood drying process is reduced, and thus the treatment quality of the wood in the pretreatment processis guaranteed; then conventional drying is adopted, and compared with direct adoption of conventional drying, the wood drying method greatly improves wood drying efficiency, reduces drying stress, reduces drying defects and improves drying efficiency.

The invention relates to the field of heating devices, and discloses an automatic coal adding heating furnace which comprises a furnace body and a hearth. The hearth is located in the furnace body. The heating furnace further comprises a support, a coal storage bin and a water storage barrel. The support is fixed to the furnace body and provided with a gear transmission system. The coal storage bin is in an annular shape, the coal storage bin is coaxially and rotationally connected to the periphery of the hearth, the inner wall of the coal storage bin is provided with an opening, a coaxial outer gear ring is fixed to the outer wall of the coal storage bin, and the outer gear ring is driven by the output end of the gear transmission system. The water storage barrel is fixed to the furnace body. The upper end in the water storage barrel is provided with an opening. A piston is in sliding connection with the interior of the water storage barrel. The piston is connected with the input end of the gear transmission system. The heating furnace further comprises a compressed spring. The lower end of the compressed spring is fixed to the piston, and the upper end of the compressed spring is fixed to the support. The piston is further provided with a pressure release valve. The hearth is provided with a discharge outlet communicating with the coal storage bin. The water storage barrel is further provided with a heat conductive pipe for accelerating water evaporation and a water inlet pipe for water adding. By means of the automatic coal adding heating furnace, coal can be automatically added into the hearth.

The object of the present invention is to solve the problems in the prior art such as contamination of other raw materials for evaporation due to gasification of organic materials, or loss of control due to uncontrollable film formation speed, and to provide a method that can stably adjust and control the deposition rate. A laser vapor deposition method and a laser vapor deposition device for an organic material with a film speed and an evaporation rate, in the method of carrying out laser vapor deposition of at least one organic material, it is characterized in that the duty ratio of the laser light that vaporizes the organic material is Make adjustments. In addition, it is characterized in that the above-mentioned duty ratio is adjusted based on the evaporation rate of the above-mentioned organic substance and the vapor pressure in the vacuum chamber for vapor deposition.

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 discloses an efficient clean gas-liquid dual-fuel dual-vortex burner, and belongs to the field of burning. The efficient clean gas-liquid dual-fuel dual-vortex burner comprises a large-diameter connecting pipe, a small-diameter connecting pipe, an inner hexagonal screw, a first vortex block, a second vortex block, an axial liquid atomizer and a hexagonal nut. Gas fuel and an oxidizing agent are introduced into a burning chamber from N1 tangential inlets of the first vortex block for mixed burning; air injected coaxially and tangentially into the second vortex block is heated by the high-temperature gas generated during mixed burning; the heat of the heated air is transferred to a coaxial liquid fuel line located in the second vortex block; through the heat transfer with the vortex air, the liquid fuel is boiled and evaporated, and is sufficiently mixed with the preheated air for combustion under the action of the vortex at an outlet of the liquid line, so that steady flame burning is realized and the operating cycle of the burner is extended. The technical problems to be solved by the invention are that the evaporation, atomization and pollutant discharge in the burning process of the liquid fuel are reduced, steady flame burning is achieved and the operation cycle of the burner is extended.

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.