32results about How to "Efficiently circulated" patented technology

A device for dispersing gas into molten metal includes an impeller, a drive shaft having a gas-transfer passage therein, and a first end and a second end, and a drive source. The second end of the drive shaft is connected to the impeller and the first end is connected to the drive source. The impeller includes a first portion and a second portion with a plurality of cavities. The first portion covers the second portion to help prevent gas from escaping to the surface without entering the cavities and being mixed with molten metal as the impeller rotates. When gas is transferred through the gas-transfer passage, it exits through the gas-release opening(s) in the bottom of the impeller. At least some of the gas enters the cavities where it is mixed with the molten metal being displaced by the impeller. Also disclosed are impellers that can be used to practice the invention.

A system for transplant production comprises: at least one air conditioner installed in a completely light shielding closed structure surrounded by a thermally insulated wall, for controlling temperature and humidity of air in the closed structure; at least one box-shaped culturing module disposed in an internal space of the closed structure, having a front face opening which is opened to the internal space of the closed structure; a plurality of transplant production shelves arranged vertically in a multi-layer in the culturing module to form a transplant production space between upper and lower transplant production shelves; a plurality of plug trays for holding a plant growing medium mounted on each transplant production shelf; a sub-irrigation unit capable of irrigation from a bottom of the plug trays mounted on each transplant production shelf; an artificial lighting unit provided on a back of each transplant production shelf for irradiating light to the lower plug trays; and at least one air fan fixed to a back wall of each transplant production shelf of the culturing module. By sucking air whose temperature and humidity have been controlled by the air conditioner using the air fan from the front face opening of the culturing module and sending the air to a rear of the back wall of each transplant production shelf, temperature-controlled and humidity-controlled air can be generated.

Disclosed is a system and method for treating domestic and industrial biological waste using diffusers to force circulation and aerate a treatment lagoon. Several lagoons may be used in series to treat raw waste and different variations may be employed to stepwise process the waste. A blend of aerobic and anaerobic microbes is chosen to remove undesired species initially present in the waste or later formed therein, as well as to process the waste itself, depending on the nature of the waste. Aeration with slightly ozonated or oxygenated air facilitates rapid and complete processing of large amounts of waste.

A method in a pneumatic material conveying system, such as a waste conveying system, which conveying system comprises at least one feed point (61) of material, particularly of waste material, a material conveying pipe (100) which is connectable to the feed point (61), a separator device (20) in which the material being conveyed is separated from conveying air, and means (3) for providing a pressure difference in the conveying pipe (100) at least during the conveyance of the material. At least a part of the conveying piping (100) is connectable as a section of a circuit in which conveying air is circulated at least during the conveyance of the material with a pump device (3) the suction side of which is connected to at least one separator device (20) and further to the conveying pipe (100) on its return side so that at least part of conveying air on the pressure side of the pump is led in the circuit on the supply side of the conveying pipe (100).

The present invention relates to an inline fan housing assembly adaptable for connection with conduits of various diameters. The inline fan housing assembly comprises a connector collar for connection to the inlet or exhaust ports of the fan housings to adapt the fan housings for connection to a variety of conduits having diameters not designed to connect with the inlet or exhaust ports of the fan housing. The inline fan housing assembly also comprises an inner inlet ring for adapting the inlet port of the inline fan housing to direct air into motorized impellor of various sizes mounted within the inline fan housing. The connector collars of the present invention contain one or more steps, each step suitable for connection with a conduit of a different diameter. In one exemplary embodiment, the inner steps of the connection collar are removable thereby allow for increased air flow through the connection.

Method in a pneumatic material conveying system, such as in a waste conveying system, which conveying system comprises at least one input point (61) of material, more particularly of waste material, a material conveying pipe (100), which can be connected to an input point (61), and a separating device, in which the material to be transferred is separated from the conveying air, and also means for achieving a pressure difference and / or a conveying air flow in the conveying pipe (100) at least during the transfer of material. In the method material is conveyed from an input point (61) to the separating means (106) or an accumulator tank of a subsystem (1), where the material is separated from the conveying air, and in a second phase the separating means (106) or the accumulator tank of the subsystem (1) is emptied.

The invention relates to a method for preparing a gold-containing solution by chloride leaching from gold-bearing raw materials. A further object of the invention is to provide a method for recovering gold and optionally silver from the prepared gold-containing solution. The invention relates also to a process arrangement for recovering gold and optionally silver.