This in-line active and reverse calculating mass balance blending system can maintain a chemical at desired control points, such as with respect to concentration, temperature, and/or pressure, while the output flow rate is changing dynamically to a point of use. A blending unit is configured to receive and blend at least two species and deliver a mixture at selected concentrations to points of use. A controller can be configured to determine a mass balance to maintain the concentrations in the mixture using information from metrology systems and a flow in an output to the at least one point of use. The controller also can be configured to maintain a concentration in the mixture within a concentration range by controlling flow rates to the blending unit.

This in-line active and reverse calculating mass balance blending system can maintain a chemical at desired control points, such as with respect to concentration, temperature, and/or pressure, while the output flow rate is changing dynamically to a point of use. A blending unit is configured to receive and blend at least two species and deliver a mixture at selected concentrations to points of use. A controller can be configured to determine a mass balance to maintain the concentrations in the mixture using information from metrology systems and a flow in an output to the at least one point of use. The controller also can be configured to maintain a concentration in the mixture within a concentration range by controlling flow rates to the blending unit.

A polymer dispersion system for use in a hydraulic fracturing operation is disclosed. The system comprises: (a) a first sub-system comprising an ingress and an egress; (b) a second sub-system comprising an ingress and an egress; (c) an eductor mixing device comprising a first inlet in fluid communication with the egress of the first sub-system, a second inlet in fluid communication with the egress of the second subsystem, and an egress; (d) a tank assembly comprising an ingress and an egress, the ingress of the tank assembly being in fluid communication with the egress of the eductor mixing device; and (e) a transfer sub-system comprising an ingress that is coupled to the egress of the tank assembly. The transfer sub-system comprises a first transfer pump and a second transfer pump. In addition, method for operating the polymer dispersion system is disclosed.

An indirect heating, drying and mixing chamber has a drum. A mixing/conveyor mechanism is positioned within the drum mixing and moving materials through the drum. An enclosure is provided wherein the drum is inserted within the enclosure to form an upper section of the enclosure between the drum and a top surface of the enclosure and a lower section of the enclosure between the drum and a bottom surface of the enclosure. A plurality of heat openings is formed on the bottom surface of the enclosure. A plurality of heating elements is provided, wherein an individual heating element is coupled to a corresponding heat opening, the plurality of heating elements generating heat which travels along the lower section of the enclosure and through the upper section of the enclosure heating the material in the drum.

A method for manufacturing a pelletised mineral product, the method comprising: in a first mixing step, forming a first mixture by mixing the evaporite mineral with non-gelatinised starch under conditions that are insufficient to substantially gelatinise the starch; in a second mixing step, forming a second mixture by mixing the first mixture under conditions that are sufficient to substantially gelatinise the starch comprised within the first mixture; and forming the second mixture into pellets.

The present disclosure relates to use of specialized vessels for formulating and dispensing pharmaceutical formulations. The vessels are optionally able to maintain homeostatic conditions and a homogeneous constitution of pharmaceutical suspensions, while simultaneously dispensing them into single-use containers.

A fluid dispersing device includes a tubular first wall portion with an axis extending in a first direction defined as a central axis, and a second wall portion separated downward from the first wall portion. The second wall portion includes at least one circular member and a disk-like member each having a flat surface for causing a fluid passing through an inner space of the first wall portion to collide therewith. The disk-like member is separated downward from the at least one circular member. The at least one circular member has an outer diameter equal to or smaller than an inner diameter of the first wall portion. The disk-like member has an outer diameter equal to or smaller than an outer diameter of the closest circular member.

A machine for and method of making a paste of active material for application to a grid to make a plate for a lead acid battery. In the machine and method sulfuric acid, at least one dry additive and red lead or leady oxide are mixed together and the mixture is cooled by a plurality of cooling zones to maintain the mixture at a temperature not greater than a predetermined maximum temperature.

A hotplate device has a body with a platform for receiving a vessel that contains a sample to be heated. A heating element, arranged under the platform, provides heat to the platform, based on a set temperature and a measured temperature as sensed by at least one temperature sensor, proximate to the platform. A controller located in the body directs electrical power to the heating element. As a safety feature, a wireless communication feature allows a user to enter set temperature instructions from a mobile device when communication with the mobile device is enabled and established. A proximity feature, when enabled, allows the user to enter instructions only as long as the user remains in a predetermined proximity of the hotplate device.

A microreactor system that can mix fluids at precise timing has two inlets into which fluids are introduced and merges, in a channel, a first fluid introduced from a first inlet and a second fluid introduced from a second inlet, a first pump that sends the first fluid toward the inlets, and a second pump that sends the second fluid toward the inlets, a first fluid detector that detects an arrival of the first fluid at the first inlet, and a second fluid detector that detects an arrival of the second fluid at the second inlet.