Process Control Eengineering
Showing 13–24 of 40 results
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Process Control EengineeringNutsche Pressure Filter
Nutsche Filters are used for discontinuous cake filtration of suspensions with high solid concentrations. The suspension production unit produces a suspension of diatomite and water and delivers it from above into the Nutsche Filter. In the bottom flange of the Nutsche Filter is a recessed sieve base with a filter cloth. A growing filter cake accumulates on the filter cloth made from the separated solid material. The applied pressure in the top section of the Nutsche Filter pushes the filtrate through the filter cake and the filter cloth. It is collected in the bottom section of the tank. After filtering, the filter cake obtained is washed with a washing liquid (water) and is then dried by an air stream.
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Process Control Eengineering
Nutsche Vacuum Filter
Nutsche Filters are used for discontinuous cake filtration of suspensions with high solid concentrations. The suspension production unit produces a suspension of diatomite and water and delivers it from above into the Nutsche Filter. A filter bag is inserted in the Nutsche Filter. A growing filter cake accumulates in the filter bag made from the separated solid material. The vacuum in the bottom section of the Nutsche Filter draws filtrate through the filter cake and the filter bag. It is collected in the bottom section. After filtering, the filter cake obtained is washed with a washing liquid (water) and is dried by the applied vacuum before being removed.
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Process Control Eengineering
PH – Value Control Trainer
This teaching and training system provides a comprehensive experimental introduction to the fundamentals of process control using an example of temperature control. A circulating pump transfers water within a closed circuit. The flow of water can be regulated by a hand-operated valve. The loop also contains a screw-in heater, a heat exchanger with fan, and three integrated thermocouples for temperature measurement. Dead times can be represented by the use of different lengths of process delay. A thyristor power controller is used as the actuator. The controller used is a state-of-the-art digital industrial controller. It can be configured as a continuous or a switching device, and can activate the heater via the actuator and / or the fan. The controlled variable X and the manipulating variable Y are plotted directly on an integrated 2-channel line recorder. Alternatively, the variables can be tapped as analogue signals at lab jacks on the switch cabinet. This enables external recording equipment, such as an oscilloscope or a flatbed plotter, to be connected. A process control software is optionally available. The software permits the construction of a complete networked system comprising multiple trainers from the series. The key process variables can also be represented, and control functions executed.
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Process Control Eengineering
Pneumatic Transport
Pneumatic conveyors can be used to transport dispersed solids over great distances in pipelines. The solid is transported out of a feed tank via a vibrating trough into an airflow. An interchangeable injector disperses the solid in the airflow. The airflow transports the solid upwards in the tube. The transport terminates in a collector tank. Depending on the velocity and solid content of the airflow, different transport states may occur. At high velocities, the solid is dispersed evenly across the cross-section of the tube (dilute phase transport). If the velocity is reduced, strands and balls form on the wall of the tube which then slide down owing to their higher settling velocity. The strands and balls disintegrate again in the airflow and reform. Reducing the velocity to below the settling velocity of the individual particles ultimately results in plug transport. The different transport states can be observed through the transparent tube. To identify the pressure loss and the flow velocity, measuring points are provided at all relevant positions. The velocity of the airflow is adjusted by a pressure regulator. The solid mass flow can be adjusted by way of the throw of the vibrating trough on a potentiometer. The compressed air can be provided from the laboratory supply or by the supply unit . Peas or plastic granulate are recommended for use as the solid. The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments
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Process Control Eengineering
Pressure Control Demonstration Unit
This training system provides a comprehensive experimental introduction to the fundamentals of process control using an example of pressure control. All components are clearly laid out on a vertical front panel. The large-format process diagram provides an aid to understanding. The controlled system is operated by compressed air, which must be provided by the laboratory. The use of two in-line pressure vessels permits a 2nd order control system to be constructed. Disturbances can be generated by alternate air tapping by way of a hand-operated valve. Both pressure vessels are fitted with manometers. An electronic pressure transducer measures the pressure. The controller used is a state-of-the-art digital industrial controller. The actuator in the control loop is an electro-pneumatic control valve. The controlled variable X and the manipulating variable Y can be tapped as analogue signals at lab jacks. This enables external recording equipment, such as a plotter or an oscilloscope, to be connected.
An instrumentation and control software with interface module (USB) is available as an accessory. This enables the key process variables to be represented, and control functions executed. The well-structured instructional material outlines the technological fundamentals and provides a step-by-step guide through the experiments. -
Process Control Eengineering
Pressure Control Trainer
This teaching and training system provides a comprehensive experimental introduction to the fundamentals of process control using an example of pressure control. The air pressure control system is a 2nd order system. It comprises two in-line pressure vessels interconnected by a restrictor valve. An additional valve on the second tank makes air tapping possible and so can be used to simulate a disturbance variable. A pressure transducer mesaures the pressure in the second vessel. The controller used is a state-of-the-art digital industrial controller. The actuator in the loop is a pneumatically operated control valve with a standardised current signal input. The controlled variable X and the manipulating variable Y are plotted directly on an integrated 2-channel line recorder. Alternatively, the variables can be tapped as analogue signals at lab jacks on the switch cabinet. This enables external recording equipment, such as an oscilloscope or a flatbed plotter, to be connected.
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Process Control Eengineering
Process Control Rig
The unit is used as an introduction to the subject of control technology. Temperature, flow rate and filling level control systems are used as examples to provide clear and practical fundamental information. The experimental system is controlled from the PC screen (not included in scope of supply). The supplied process control and illustration programs make it possible to carry out the experiment as well as record measurement reports and store measured data. Important process variables are shown digitally on the unit itself. All components of the unit are clearly mounted on a metal sheet. The storage and process tanks are transparent for better viewing of the process. The unit is designed as a experimental unit for tabletop use. It requires only an electrical power connection for operation.
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Process Control Eengineering
Process Control Training Plant
This training system for process control represents a fully functional process control system. It consists of four individual systems: process module, control console, fault simulator and service module. The actual process module contains the devices and loops for liquid-level, flow rate, temperature and pressure control with all necessary equipment, tanks and vessels, pipes and delay coils, various sensors and pneumatically actuated valves. The system is laid out in a way to represent a realistic part of a plant also found in heavy industry. The control console is equipped with four digital universal industrial controllers and four three-channel chart recorders. The controllers can configured independently as required and can be operated both individually and simultaneously. They all have serial interfaces permitting parameters to be set from a PC and facilitating interfacing with a process control system. The separate console for the fault simulation unit is used to study ten different typical system faults, e.g. sensor failure or cable break. These are activated using switches. Their effect on the system behavior of the system can then be investigated. The service module provides compressed air, hot and cold water for the process module. A process communication system facilitates the central control and monitoring of the system.
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Process Control Eengineering
Reverse Osmosis
This experimental unit has been developed in conjunction with the Institute for Thermal Process Engineering at the TU Hamburg-Harburg. A Sodium chloride (NaCl) solution is delivered from a tank to the membrane module using a pump. The pump generates the necessary osmotic pressure for separation. The semi-permeable membrane is permeable for water but not for the dissolved NaCl. This causes the solution to separate out into retentate (concentrated solution) and permeate (water). The retentate and permeate are fed back to the solution tank but can also be collected separately. In order to check the success of the separation, salt concentrations in the feed, retentate and permeate are recorded by measuring the respective conductivity values. A further tank containing distilled water is available for flushing the system at low pressures and high flow rates. To prevent the pump from running dry, both tanks are fitted with low water protection.
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Process Control Eengineering
Rising Film Evaporation
Evaporators are used in process engineering and food technology for increasing the concentration of solutions. Part of the solvent is removed by evaporation, which means that the solution retains a higher concentration of dissolved solids. Film evaporators are used in particular for temperature-sensitive solutions such as milk.The CE 715 allows the operating behaviour of a rising film evaporator to be investigated. The untreated solution is fed from the feed tank below into the evaporator. The evaporator is a double pipe heat exchanger that is heated by steam. The steam pressure on the casing side is adjusted with a PID controller. A cyclone is installed after the evaporator to separate the evaporated solvent and the concentrated solution. The solvent vapour removed is condensed in a water-cooled condenser and collected in a tank. The concentrated solution can also be collected in a tank or fed back into the evaporator for the concentration to be increased further. The two tanks, the cyclone and the condenser are made of glass for better observation. The system can also be operated under a vacuum to reduce the boiling point of the solvent. The evaporation pressure, heating steam pressure, relevant temperatures and flow rates are recorded to allow evaluation and monitoring of the process. To clean the system while installed, a pump and cleaning nozzles are fitted in the condensate and concentrate tanks. Common salt and water are the recommended cleaning materials. allows the operating behaviour of a rising film evaporator to be investigated. The untreated solution is fed from the feed tank below into the evaporator. The evaporator is a double pipe heat exchanger that is heated by steam. The steam pressure on the casing side is adjusted with a PID controller. A cyclone is installed after the evaporator to separate the evaporated solvent and the concentrated solution. The solvent vapour removed is condensed in a water-cooled condenser and collected in a tank. The concentrated solution can also be collected in a tank or fed back into the evaporator for the concentration to be increased further. The two tanks, the cyclone and the condenser are made of glass for better observation. The system can also be operated under a vacuum to reduce the boiling point of the solvent. The evaporation pressure, heating steam pressure, relevant temperatures and flow rates are recorded to allow evaluation and monitoring of the process.To clean the system while installed, a pump and cleaning nozzles are fitted in the condensate and concentrate tanks.
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Process Control Eengineering
Rolling Agglomeration
The terms agglomeration, granulation and pelletisation designate the process of particle size enlargement of solids. This trainer was developed in cooperation with theDepartment of Mechanical Engineering and Process Engineering at the Niederrhein University of Applied Sciences in Krefeld. A powder (fine material) is continuously fed onto an inclined, rotating dish granulator. A pump delivers granulating liquid to a two-component nozzle. The liquid is atomised over the powder by compressed air. Starting from a small number of moistened particles, a rolling motion produces growing numbers of balls (agglomerates). The fine material in the moved layer tends to remain close to the bottom. It is lifted higher than the forming agglomerates by the rotary motion of the dish. The ball-shaped agglomerates roll along the surface of the layer. When they have attained a certain size, they drop off the rim of the disc. The agglomerates are collected in a tank. Two further tanks are provided for the solid material (for which powdered limestone is recommended) and the granulating liquid (sugar powder diluted in water). The mass flow of solid feed material, the flow rate of the liquid, the speed and the angle of inclination of the disc are adjustable. The compressive strength of the resultant agglomerates can be measured using a laboratory device or with accessory unit . To determine these and other key properties of the agglomerates, a balance and drying chamber are also recommended.
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Process Control Eengineering
Solid-Liquid Extraction
The Solid-Liquid Extraction allows a soluble component of a solid mixture to be extracted. In continuous three-stage mode, pure solvent (water) is delivered from a tank to the nozzle of the first extraction stage where it is distributed over the extraction material. The solvent seeps through the extraction material, takes up the soluble components and passes into the collecting segment. From here, the enriched solvent is delivered to the nozzle of the next stage. After passing through the last stage, the solvent charged with the extracted component is collected in the extract tank. The extraction material (potassium bicarbonate with special carrier material) is continuously fed into the cells of the rotating extractor by a feed mechanism. The extraction material and solvent move in countercurrent and the depleted extraction residue falls into a tank after one rotation of the extractor.Valves can be used to switch to 1 or 2-stage continuous mode. Discontinuous mode is possible with the carousel stopped. Three pumps are available for delivering the solvent, their speed can be individually adjusted for each stage . The solvent temperature at each level is adjusted by a PID controller and displayed. Each stage is equipped with conductivity sensors to monitor. the separation process. Relevant experimental parameters are recorded by sensors, displayed digitally and can be processed onto a PC.