A fuel-gas blending system receives low-pressure tank vapors and high-pressure flash gases from an oil production facility, boosts the pressure of the tank vapors, and blends the tank vapors and high-pressure gases together to supply fuel gas at a pressure and quality required by an onsite fuel-gas-powered generator. The quality of the supplied fuel gas is maintained by controlling the proportion of a high-pressure gas, such as separator gas, in the blend while the volumetric flow rates of the various gases vary in response to the real-time demands of the generator. The system operates in one of multiple modes in order to maximize the use of tank vapors. In one mode, all the gases pass through a low-pressure blower. In another mode, only the tank vapors pass through the blower, and the high-pressure gases are blended with tank vapors downstream of the blower.

A plural component dispensing system individually delivers separate material components to each of a plurality of proportioners. Each of the proportioners regulates volumetric flow of each of the separate material components to produce a target ratio of the separate material components associated with the proportioner. The target ratios associated with the plurality of proportioners can be the same or different target ratios. Each proportioner delivers the separate material components at the associated target ratio to one of a plurality of dispensing devices. Each dispensing device mixes the separate components received at the corresponding target ratio and delivers the components as a mixture.

A fluid supply system (150) adapted for metering two or more fluids in controlled proportions and for supplying a resultant mixture, the fluid supply system (150) comprising a plurality of solvent supply lines (104 to 107), each fluidically connected with a fluid source (100 to 103) providing a respective fluid, a pumping unit (110) comprising a reciprocating element (115) adapted for intaking fluid supplied at an inlet of the pumping unit (110) and for supplying the pressurized fluid at an outlet of the pumping unit (110), wherein the pumping unit (110) is adapted for taking in fluids from selected solvent supply lines (104 to 107) and for supplying a pressurized mixture of the fluids at its outlet, a proportioning valve (108) interposed between the solvent supply lines (104 to 107) and the inlet of the pumping unit (110), the proportioning valve (108) adapted for modulating solvent composition by sequentially coupling selected ones of the solvent supply lines (104 to 107) with the inlet of the pumping unit (110), and a longitudinal mixing unit (152) adapted for mixing longitudinally subsequent sections of the fluids so as to modify their succession in flow direction.

A raw material gas supply apparatus is configured to obtain a difference between a set value and a measured value of a vaporized raw material, add the difference as a correction value to the set value of the flow rate of the carrier gas to maintain an amount of the vaporized raw material at the set value, and subtract a difference from a set value of a flow rate of the dilution gas to maintain a total flow rate of the carrier gas and the dilution gas at a constant level. The amount of the vaporized raw material is calculated by subtracting an integration value of a measured value of the flow rate of the inert gas in the supply period of the raw material gas from an integration value of the flow rate of the raw material gas which is measured in the supply period.

A method includes mixing a first deionized water (DI) water from a first pipe and a second DI water from a second pipe in a merging pipe that is in fluid communication with the first pipe and the second pipe. An electrical resistivity of the first DI water is different from an electrical resistivity of the second DI water. A mixture of the first DI water and the second DI water is applied from the merging pipe onto a wafer.

A circulation pump assembly for a heating and/or cooling system includes an electric drive motor (108) and a connected pump housing (106) in which at least one impeller (118) is situated and which comprises a first inlet (112) and a first outlet (114). The pump housing (106) includes a second inlet (122) which is connected in an inside of the pump housing (106) at a mixing point (130) to the first inlet (112). A regulating valve (134), which is designed for regulating the mixing ratio of two flows mixing at the mixing point (130), as well as a control device, which controls the regulating valve (134) for regulating the mixing ration, are arranged in the pump housing (106). A hydraulic manifold is provided with such a circulation pump assembly.

The present invention relates to a liquid mixing device which has a control system and electronic regulation, in charge of receiving the parameters set with respect to the liquid which is expected to be supplied by the tap or supply means whereto said device is connected and which acts on the regulation means of the different supply lines of liquids to mix to achieve said parameters, which has a high measurement and actuation dynamic thanks to measuring sections with ultrasonic transducers and proportional solenoid valves and a configuration and geometry of said measuring sections which allows having a multitude of reliable measurements per second.

Adjustable venturi assemblies and methods of using adjustable venturi assemblies are disclosed. In one aspect, a venturi assembly for injecting a secondary fluid into a primary fluid flow path is provided. The venturi assembly comprises a nozzle, a constricted section in fluid communication with the nozzle, a secondary fluid conduit in fluid communication with the nozzle, and a flow adjusting device. The nozzle and constricted section together define the primary fluid flow path along a first axis. The secondary fluid conduit is for transporting secondary fluid from the secondary fluid reservoir to the constricted section along a second axis. The flow adjusting device is positioned opposite the secondary fluid conduit and is configured to alter a velocity of fluid flowing along the primary fluid flow path by extending into a portion of the constricted section along the second axis.

Systems for producing fuel compositions with predetermined desirable properties are disclosed. Feedback control can be employed to meter precise amounts of fuel composition components while monitoring fuel composition properties to obtain fuel compositions having specifically defined properties.

The present invention makes it easy to control the amount of material gas led out of a tank. Accordingly, carrier gas is introduced into a tank containing a material and together with the carrier gas, from the tank, material gas produced by vaporization of the material is led out. A control part controls the flow rate of the carrier gas so that a concentration index value obtained by measuring mixed gas led out of the tank and indicating the concentration of the material gas in the mixed gas comes close to a predetermined target concentration index value. In addition, the control part controls the flow rate of the carrier gas to change at a predetermined change rate, and then controls the flow rate of the carrier gas on the basis of the deviation between the concentration index value and the target concentration index value.