10results about "Boiling apparatus" patented technology

Provided is a method for concentrating a sodium hydroxide aqueous solution including: in a stepwise concentration process of sodium hydroxide aqueous solution, including a concentration part in which a plurality of evaporators from a first evaporator to a nth evaporator are connected in series, adding a sodium hydroxide aqueous solution to the first evaporator and then performing evaporation to obtain a first sodium hydroxide concentrate, and recovering steam evaporated from the sodium hydroxide aqueous solution; and adding the first sodium hydroxide concentrate to an evaporator at a subsequent stage, and adding the steam recovered from the first evaporator to a mechanical vapor recompression device to perform compression, wherein the nth evaporator uses the compressed steam as a heat source.

The present application relates to laboratory analysis equipment technical field, disclose a kind of steam distillation apparatus, including steam generator and multiple groups of distillation units in parallel arrangement;Steam generator is provided with control console and steam outlet, steam outlet is connected with main steam pipeline, multiple branch pipes are arranged on main steam pipeline at intervals, electromagnetic valve is arranged on each branch pipe, and electromagnetic valve is electrically connected with control console;Each group of distillation units includes sequentially connected reaction vessel, condenser and collection vessel;Reaction vessel is communicated with main steam pipeline by branch pipe, for steam is introduced into the bottom of reaction vessel;Condenser is communicated with reaction vessel, for after distillation product is condensed into liquid, it is exported to collection vessel.The multiple groups of distillation units of the present application share a steam generator, realize steam independent distribution in each distillation unit, save space and energy consumption, improve efficiency, and automation is realized, greatly reduce the security risk of operation process.

A method for preparing metallic magnesium and industrial silicon by decomposing serpentine with hydrochloric acid is provided. Serpentine is used as a raw material, and is processed by a two-stage countercurrent leaching process in a hydrochloric acid system. A hydrometallurgical process is adopted, including beneficiation, wet grinding, slurry storage, filtration, two-stage atmospheric pressure hydrochloric acid leaching, washing and filtration of leached silica slag, iron removal and nickel precipitation from a leachate, separation, washing and filtration of a ferric hydroxide precipitate and a nickel hydroxide precipitate, crystallization and evaporation of a magnesium chloride solution, and hydrochloric acid preparation from a flue gas generated after thermal decomposition of magnesium chloride. The present disclosure develops a process of decomposing serpentine with hydrochloric acid and producing metallic magnesium by a drying-electrolysis method, and a process of producing industrial silicon by smelting silica slag in an electric furnace.

A method for concentrating an aqueous sodium hydroxide solution is provided, comprising: in a stepwise concentration process of an aqueous sodium hydroxide solution including a concentration section comprising a first evaporator to an nth evaporator connected in series, adding the aqueous sodium hydroxide solution to the first evaporator, then evaporating it to obtain a first sodium hydroxide concentrate, and recovering the vapor evaporated from the aqueous sodium hydroxide solution; and adding the first sodium hydroxide concentrate to a subsequent evaporator, and adding the vapor recovered from the first evaporator to a mechanical vapor recompression device for compression, wherein the nth evaporator uses the compressed vapor as a heat source.

The utility model discloses an energy-saving vaporization device of a depressurization flash coupling kettle type reboiler, which is characterized in that the temperature of kettle liquid is lower than that of tower top steam through depressurization and cooling, the kettle liquid is subjected to heat exchange with the tower top steam in the kettle type reboiler after being subjected to flash evaporation and cooling, the kettle liquid absorbs heat to be vaporized and enters a gas buffer tank together with flash steam; and high-quality gas capable of being compressed and heated is provided for heat pump rectification and other processes.

The application discloses an energy-saving coupling system for acetonitrile-water azeotropic distillation and a coupling reboiler. The system comprises a high-pressure rectifying tower and a low-pressure rectifying tower stacked in an up-down mode, a coupling reboiler, an auxiliary reboiler and a steam re-compressor. The condensation heat at the top of the high-pressure rectifying tower is used to drive the reboiling of the low-pressure rectifying tower in the coupling reboiler; the steam at the top of the low-pressure rectifying tower is pressurized and heated by the steam re-compressor, and the condensation heat thereof is used to drive the reboiling of the high-pressure rectifying tower in the auxiliary reboiler, thus forming a double-closed-circuit energy cycle. The application further discloses a coupling reboiler which adopts a structure of central feeding, bidirectional flow separation and end-top gas collection, and can efficiently realize heat coupling and non-condensable gas separation. The application reduces the energy consumption of the distillation process, improves the separation efficiency of the rich acetonitrile stream, and has compact structure and reliable operation.

An object of the invention is to provide a method for economically and environmentally friendly collecting carbon powder for an anode from a waste lithium-ion secondary battery, a recycled anode carbon powder obtained from therefrom, and a lithium-ion secondary battery to which the recycled anode carbon powder is applied. To achieve the object, a method for recycling an anode material includes a step (a) of loading a heat treatment object including the anode material into a heat treatment furnace, a step (b) of raising an internal temperature of the heat treatment furnace to increase to a range of about 100°C to about 400°C, a step (c) of heat-treating the heat treatment object at the increased temperature, and a step (d) of discharging first powder made after the heat treatment of the heat treatment object is completed. The first powder includes recycled anode powder selected from the group consisting of recycled carbon powder, silicon powder, silicon oxide powder, carbon-silicon composite material powder, or combinations thereof, and the heat treatment object includes at least a portion of a waste lithium-ion secondary battery or wastes generated during a process of manufacturing the lithium-ion secondary battery or a process of manufacturing the anode material.

A drink maker is described that includes a mixing vessel, a temperature sensor, and an evaporator. The evaporator may be positioned within the mixing vessel and the evaporator may include a first section, and a second section adjacent the first section. The second section may include a heat exchanger that provides a cooling effect and the temperature sensor may be positioned within the first section.

The application provides a falling film reboiler with a circumferential slotted overflow film distributor, the film distributor is connected with a part of a protruding tube sheet of heat exchange tubes and is aligned with the heat exchange tube mouth through spot welding connection, the film distributor is divided into two parts, the lower 1 / 3 part is a liquid storage space, the remaining upper part is a spiral slotted part, the spiral angle is 360° and is respectively formed by a plurality of notches. In the reboiler operation, when the material is accumulated on the tube sheet until overflowing the notch, the material is simultaneously overflowed into the inner wall of the film distributor along the axial direction and the circumferential direction from the notch, so that complete and uniform liquid films are formed on the inner wall of the heat exchange tubes, and because the high viscosity fluid has high viscosity, it can be considered as laminar flow, so the superposition between the liquid films does not affect the completeness of the liquid films. The novel film distributor has the advantages of excellent film distribution effect, easy installation, wide applicable viscosity range and the like.