Methods and apparatus are disclosed relating to mixing fluids in welding-type equipment. In some examples, a welding-type power supply (and/or wire feeder) may include multiple fluid paths through which to provide fluid from multiple fluid reservoirs to multiple welding-type tools. The power supply may be configured to automatically control fluid flow rates through the fluid paths via proportional valves. Further, the welding-type power supply may be configured to allow and/or prohibit mixing of fluids from different flow paths via control of various valves.

Various illustrative systems, devices, and methods of beverage carbonation system flow control are provided. A carbonation system is one example of a treatment system to which the systems, devices, and methods described herein apply. In general, a carbonation system is configured to form a carbonated fluid and dispense the carbonated fluid in a controlled manner. In an illustrative embodiment, the carbonation system is configured to begin dispensing the carbonated fluid with a pressure in a chamber of the carbonation system, in which the carbonated fluid is formed, being above atmospheric pressure. A gas is introduced into the chamber after dispensing has already started via the pressure in the chamber to drive the flow of the carbonated fluid. The gas can be introduced into the chamber according to a predetermined pressure profile.

A volatiles consuming eductor system for coated scrap metal furnaces with separate delacquering and melt chambers. Motive gas is forced through an inlet into a mixing chamber in a direction opposite a suction port, creating a Venturi that draws gases from the delaquering chamber through the mixing chamber. The motive gas and the drawn gases mix and are forced through a discharge port, ignited, and injected into the melt chamber to help heat the melt chamber. A computer monitors process conditions and controls a regulator that adjusts the motive gas flow in response to those conditions.

A carbonation machine with integrated water treatment. The carbonation machine may include a carbonation system for carbonating water in a bottle attached to a carbonation head of the system, a detachable water reservoir, configured to be mounted on a base with an outlet port to allow outward flow of water from the reservoir, piping connecting the outlet port of the water reservoir to transfer water from the detachable reservoir and to pour the water into the bottle, a pump for pumping water out of the water reservoir and transfer the pumped water via the piping, a controller configured to control the pump, and one or more water treatment components fluidically connected to the piping to apply water treatment to water flowing through the piping.

Compositions and methods are provided for a system in which liquid carbon dioxide, or a mixture of liquid and gaseous carbon dioxide, is converted to solid carbon dioxide by exiting an orifice at a sufficient pressure drop, e.g., for delivery of carbon dioxide to a concrete mixture in a mixer.

A droplet preparation and size control device based on electrowetting step emulsification is provided, including a syringe pump, a metal pipeline, a micro-channel, two electrode plates, a continuous phase container and a direct-current power supply, wherein: the syringe pump, the metal pipeline and the micro-channel are successively connected; an outlet of the micro-channel is clamped and sealed between the two electrode plates; each electrode plate consists of four layers, respectively a base layer, a conducting layer, an insulating layer and a hydrophobic layer; a cathode of the direct-current power supply is connected with the metal pipeline, and an anode of the direct-current power supply is connected with the conducting layer of each electrode plate; the syringe pump is filled with dispersed phase fluid; continuous phase fluid is injected into the continuous phase container and immerses the electrode plates. The present invention can adjust a supply voltage under a constant flow, so as to change sizes of droplets through changing a contact angle, and can also adjust the voltage under a flow fluctuation situation, so as to stabilize generation of the micro-droplets, thereby preparing the ultra-uniform micro-droplets. The ultra-uniform micro-droplets have important application prospects in fields of chemical engineering, pharmaceuticals, biomedicine and biochemistry.

A method for treating in particular viscous, paste-like materials in a housing (1) with kneading elements (2, 3), in which at least one kneading element (2, 3) is to be monitored.

The invention relates to an agrochemicals pre-dilution unit comprising a mixing device that receives and mixes water and agrochemical. This unit carries out the mixing process by means of a plurality of pumps in fluid communication with the mixing device, which sends the prepared mixture a tank truck through outlet pipes. A plurality of bulks are installed in the unit and contain agrochemicals that are pumped in a controlled and precise manner to the mixing device, allowing a mixture of agrochemicals and water to be prepared with minimum human intervention. Also disclosed is the preparation of the liquid mixture controlled by a PLC, which enables an operator to obtain an accurate mixture without needing to intervene directly in the unit, since the operator can interact with the unit by means of a computer, such that such that the PLC controls all the devices in unit in order to prepare the mixture.

A gas-dissolved liquid producing apparatus capable of increasing a gas dissolution efficiency and enhancing stability of the concentration of gas-dissolved liquid is provided.

The gas-dissolved producing apparatus 1 includes an ozone gas supply unit 2 for supplying ozone gas, a pure water supply unit 3 for supplying pure water, and an ozonated water generator 4 for dissolving ozone gas in supplied pure water to generate ozonated water. The generator 4 includes a first nozzle 10 having a first optimum flow rate, a second nozzle 11 having a second optimum flow rate different from the first optimum flow rate, a flow rate detector 15 for detecting the flow rate of the supplied pure water, and a controller 16 for controlling which one of the first nozzle and the second nozzle should be supplied with the supplied gas, based on the flow rate of the pure water detected by the detector 15.

A fluids delivery system may include a mixing system configured to deliver a fluid to a wellbore; a dry component delivery system configured to deliver a dry component to the mixing system; a liquid additive system configured to deliver a liquid component to the mixing system; and a controls system configured to control the mixing system, the dry additive system and the liquid additive system to produce the fluid.