The production method includes: a gel-crushing step of grinding a crosslinked hydrogel polymer to obtain a particulate crosslinked hydrogel polymer; a heating drying step of obtaining dried particles from the particulate crosslinked hydrogel polymer by using a continuous stirring drying machine; a post-crosslinking step of post-crosslinking the particulate crosslinked hydrogel polymer or the dried particles; and a sizing step of adjusting a particle size of the dried particles or the post-crosslinked dried particles to obtain water-absorbent resin powder. The particulate crosslinked hydrogel polymer contains a gel fluidizer. A gel temperature of the particulate crosslinked hydrogel polymer containing the gel fluidizer, the gel temperature being measured by a contact thermometer, is not lower than 50° C. In the production method, the dried particles or the post-crosslinked dried particles is forcedly cooled before the sizing step.

The present disclosure relates to a towel maintenance device for storing and keeping a towel and for heating and drying the towel stored and kept therein. The towel maintenance device —provides a structure in which heated air flows in a first staying space formed in a heat transfer plate and heats the heat transfer plate, thereby allowing a textile product such as a towel and the like in contact with the heat transfer plate to be heated based on thermal conduction, and the heated air discharged through a communicating hole of the heat transfer plate is discharged while passing through the textile product such as a towel and the like or flows around the textile product such as a towel and the like, thereby allowing the product to be dried to be heated based on convection. The towel maintenance device according to the present disclosure enables entire objects to be dried to be rapidly heated and dried.

The present disclosure relates to a towel maintenance device for storing and keeping a towel and for heating and drying the towel stored and kept therein. The towel maintenance device —provides a structure in which heated air flows in a first staying space formed in a heat transfer plate and heats the heat transfer plate, thereby allowing a textile product such as a towel and the like in contact with the heat transfer plate to be heated based on thermal conduction, and the heated air discharged through a communicating hole of the heat transfer plate is discharged while passing through the textile product such as a towel and the like or flows around the textile product such as a towel and the like, thereby allowing the product to be dried to be heated based on convection. The towel maintenance device according to the present disclosure enables entire objects to be dried to be rapidly heated and dried.

A method for drying a fluid film, which is applied to a surface of a substrate and includes a vaporizable liquid, includes following steps: transporting the substrate on a transport surface of a transport device along a transport direction through a drying device; vaporizing the liquid by way of a heat source having a heating surface, wherein the heating surface is disposed at a distance of 0.1 mm to 5.0 mm opposite to a surface of the substrate; and removing a vaporized liquid in a direction of the heat source.

A method for drying a fluid film, which is applied to a surface of a substrate and includes a vaporizable liquid, includes following steps: transporting the substrate on a transport surface of a transport device along a transport direction through a drying device; vaporizing the liquid by way of a heat source having a heating surface, wherein the heating surface is disposed at a distance of 0.1 mm to 5.0 mm opposite to a surface of the substrate; and removing a vaporized liquid in a direction of the heat source.

A device for steam disinfecting products includes a treatment chamber. An evaporation pan is arranged in the chamber and heated. A liquid contained in the pan evaporates. A drying air flow is generated by a fan unit and directed onto the evaporation pan via a fan duct. A non-return element is arranged in the fan duct and prevents liquid vapor from getting from the evaporation pan to the fan unit. During an evaporation process, the fan unit is switched off and the fan duct is blocked by a non-return element. During a subsequent drying process, the fan unit is switched on and the non-return element of the fan duct is opened for the drying air flow. During operation of the fan unit, the evaporation pan is heated to a temperature above the specified minimum temperature using a heating device.

[Object] To freeze droplets of a raw material liquid in a shorter drop distance while maintaining a cooling velocity, which is a super high speed, without deteriorating a solute or dispersoid.

[Solving Means] A vacuum freeze-drying method according to an embodiment of the present invention is a vacuum freeze-drying method that includes steps of injecting a raw material liquid from an injection nozzle inside a vacuum chamber, generating frozen particles by self-freezing of the raw material liquid, and drying the generated frozen particles to thereby produce a dry powder, including: injecting the raw material liquid from the injection nozzle in a state in which the vacuum chamber is maintained at water vapor partial pressure corresponding to a self-freezing temperature of the raw material liquid, such that an injection initial velocity of the raw material liquid from the injection nozzle is 6 m/s or more and 33 m/s or less; and adjusting, when the maximum diameter of the generated frozen particle exceeds a predetermined value or droplets of the raw material liquid are unfrozen, an injection flow rate of the raw material liquid from the injection nozzle or properties of the injection nozzle such that frozen particles having a maximum diameter equal to or smaller than the predetermined value are generated.

A heating plate is included in an electronic device which also includes a processor, a detecting unit, and a battery. The detecting unit detects values of electrical current in certain parts of the electronic device. The processor determines whether any of the detected values falls within a predetermined range. If the detected value falls within a predetermined range, the processor enables a connection between the battery and the heating plate to cause the heating plate to micro-heat the electronic device to promote or accelerate the evaporation of water or moisture in the electronic device. A method for water and moisture disposal by internal heating is also provided.

A system for producing free-flowing powder with a narrow particle size distribution from liquid compositions comprising in combination: a feeding reservoir comprising said liquid compositions: a pumping device to pump said liquid composition into at least one atomizing device: said at least one atomizing device composed of at least one fluid nozzle to distribute an upward gaseous drying medium over said nozzle: two lateral streamlined tube-like devices for supplying said liquid composition and pressurized gas to said at least one nozzle from two opposite directions: a cylindrical plenum chamber wherein the fluid nozzle is located: an accelerating zone of a drying medium consisting of a cylindrical pipe located at the bottom of the cylindrical plenum: a conical-cylindrical drying chamber equipped with a manhole, a multi-nozzle manifold and insulation panels: and an intermediate drying medium consisting of a single bed or multi-beds of inert carriers within the drying chamber.

In a press area, a wet paper is pressed against a heating surface to heat the wet paper with a conveying surface to conveying the wet paper to form a pressure regulating gap between the heating surface and the conveying surface. The pressure regulating gap is provided in a size less than a thickness of the wet paper and more than a thickness of recycled paper to be produced therefrom.