Process Control Eengineering
Showing 1–12 of 40 results
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Process Control EengineeringBoiler Heating Batching Process Control System
This complete and comprehensively equipped laboratory test stand offers numerous possible experiments from the areas of process control. It contains a total of four different control loops with local digital, industrial controllers. In addition, it is also possible to realise two cascade control systems. A further controller is provided for cascade control. The controllers can be configured independently of each other as required and can be operated both individually and simultaneously. They all have serial interfaces. The experimental section is formed by a closed water circuit. Water is pumped from a supply tank through a pipe system by a 1.1 kW centrifugal pump. A pneumatically actuated control valve included in this circuit makes allows to change the flow rate and thus to control the circuit. The level can be controlled in two stainless steel tanks of differing capacity. For this purpose a bypass mounted on the tank feed is controlled by a further pneumatic valve. The two tanks can be connected together to change the characteristic of the control loop. An electronically adjustable 7.5 kW heater enables to heat the water as part of a temperature control system. During overheating, a siren and an alarm lamp will be activated. The system water in the circuit can be cooled by a heat exchanger. Fresh water from an external water supply is used as cooling liquid. The pressure control system uses external compressed air at one of the two tanks. The test stand is built using only industrial standard components to increase its relevance to practice. The support made of steel tubes is fitted with laboratory castors and can thus be easily moved around.
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Process Control Eengineering
Calibration Bench
This calibration bench enables to study the function and transient response of industrial control circuit components as controllers, control valves, pressure sensors, measuring transducers, etc. (not supplied). It also contains precise sensors for standardized current signals and the corresponding pressure and current measuring units. A height adjustable water tank with level tube allows the precise setting of even very low pressures. A sturdy assembly tube is used for the proper attachment of test components. The entire unit is set up on a laboratory trolley with four castors.
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Process Control Eengineering
Calibration Station
This calibration station is used to measure the transient response and to calibrate electrical and pneumatic actuators for control systems. It is also possible to check measurement chains. For this purpose the station is equipped with highly precise sensors and measurement methods. Specifically, these are a precise pressure sensor, a precise current sensor, a universal calibrator and two pressure transducers with digital displays. In addition, a two-channel chart recorder is included. The measuring objects available as accessories are fitted to a 450mm experimental measuring panel and are thus easy to interchange.
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Process Control Eengineering
Continuous Rectification
Distillation is used to separate liquid mixtures made up of individual liquids that are soluble in one another. Rectification refers to distillation in a countercurrent. Ethanol/water is recommended as the liquid mixture for the Distillation is used to separate liquid mixtures made up of individual liquids that are soluble in one another. Rectification refers to distillation in a countercurrent. Ethanol/water is recommended as the liquid mixture for the Distillation is used to separate liquid mixtures made up of individual liquids that are soluble in one another. Rectification refers to distillation in a countercurrent. Ethanol/water is recommended as the liquid mixture for the Continuous Rectification. It is fed into the column. It partially evaporates on its way to the bottom of the column where it is heated to boiling. The mixed vapour produced then moves upwards in the column. The mixed vapour contains a higher concentration of the component with the lower boiling point (ethanol). It leaves the top of the column and is condensed using a condenser and a phase separation tank. Part of this condensate is collected in a tank as product while the rest is fed back into the column. Here, on its way downwards, it undergoes further heating and material exchange with the rising mixed vapour. This exchange causes the vapour phase to become richer in ethanol and the liquid phase to become richer in water. The liquid phase moves to the bottom and can be collected in two tanks. A heat exchanger allows the feed to be preheated by the bottom product carried away from the column. A sieve tray column and a packed column are available. The sieve tray column has three connections at different heights for the feed. The packed column is filled with Raschig rings. The reflux ratio is adjusted using actuating valves. Relevant experimental parameters are recorded by sensors and displayed digitally and processed onto a PC. The software also allows adjustment of the evaporator and the reflux ratio using PID controllers.. It is fed into the column. It partially evaporates on its way to the bottom of the column where it is heated to boiling. The mixed vapour produced then moves upwards in the column. The mixed vapour contains a higher concentration of the component with the lower boiling point (ethanol). It leaves the top of the column and is condensed using a condenser and a phase separation tank. Part of this condensate is collected in a tank as product while the rest is fed back into the column. Here, on its way downwards, it undergoes further heating and material exchange with the rising mixed vapour. This exchange causes the vapour phase to become richer in ethanol and the liquid phase to become richer in water. The liquid phase moves to the bottom and can be collected in two tanks. A heat exchanger allows the feed to be preheated by the bottom product carried away from the column. A sieve tray column and a packed column are available. The sieve tray column has three connections at different heights for the feed. The packed column is filled with Raschig rings. The reflux ratio is adjusted using actuating valves. Relevant experimental parameters are recorded by sensors and displayed digitally and processed onto a PC. The software also allows adjustment of the evaporator and the reflux ratio using PID controllers.. It is fed into the column. It partially evaporates on its way to the bottom of the column where it is heated to boiling. The mixed vapour produced then moves upwards in the column. The mixed vapour contains a higher concentration of the component with the lower boiling point (ethanol).
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Process Control Eengineering
Fluidised Bed Formation
Bulk solids can be transformed from a packed bed into a fluidised bed when liquids or gases pass through them. The areas of application of fluidised beds include the drying of solids and a wide variety of chemical processes.Features two transparent test tanks for fluidised bed formation in water and air. A diaphragm pump delivers water from a storage tank into the bottom of the left side test tank. The water flows upwards through a porous sintered-metal plate. On the sintered-metal plate is a bulk solid. If the velocity of the water is less than the so-called fluidisation velocity, the flow merely passes through the packed bed. At higher velocities the bed is loosened to such an extent that individual solid particles are suspended by the fluid. If the velocity is increased further, particles are carried out of the fluidised bed. A filter at the top of the test tank holds these particles back. The water flows back into the storage tank. The right-side test tank is similar in construction to the left-side one. A stream of air generated by a compressor flows through itManometers are mounted on both test tanks to measure the pressure loss. The flow rates are adjusted by way of valves, and can be read from flow meters. The test tanks are removable. This makes it easy to change the bulk solid filling..
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Process Control Eengineering
Gas Flow Classification
Zigzag sifters permit classification of solid compounds. The solid compound being separated is charged into the feed hopper. The compound is fed into the zigzag duct of the sifter at mid-height by way of a vibrating trough. An air stream flows upwards through the vertical duct. Depending on the geometry and density of the particles, they are carried along by the air or drop down due to gravity. At every bend in the duct the solid compound passes through the air stream and falls onto the opposite wall of the sifter. This corresponds to one sifting stage. Owing to the flow conditions, a vortex wake is formed between two bends of the zigzag duct. It ensures that the solid matter moves roughly perpendicular to the airflow. In this way, a transverse sift takes place at every bend. Sequencing of large numbers of such stages results in very fine separation. features a 20-stage zigzag duct. Transparent material provides optimum observation of the processes in the duct. A fan generates the airflow. The airflow rate and the solid mass flow are adjustable. The fine material transported upwards with the air stream is separated by a cyclone. Pressure measurement points at the relevant positions in the trainer enable to determine the pressure loss. Sand in different particle sizes is recommended for use as the feed material. For particle size analyses of the feed and of the coarse and fine material, a balance and a screening machine are recommended.
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Process Control Eengineering
Hydrocyclone
Hydrocyclones can be used to separate solids suspended in liquids. In the suspension is prepared in a tank. A stirrer prevents premature settling of the solid particles. An eccentric screw pump delivers the suspension into the tangential inlet of the cyclone. In the cyclone a downward primary vortex is created. The downward taper causes the vortex to reverse. In the middle it moves as a secondary vortex back up towards the immersion tube, where the suspension emerges from the cyclone, having lost the coarse material in it. Inside the cyclone an air core is formed. The centrifugal forces cause the coarser solid particles in the primary vortex to be enriched. They are discharged with the bottom flow at the apex nozzle. It is mainly the fine material that is discharged from the top. The outflow form of the bottom flow changes depending on the solid concentration of the introduced suspension. Where the solid concentration is high, strand discharge occurs. Where the solid concentration is low, the discharge is fan-shaped. The flow rate in the inlet is adjusted by way of the pump speed and measured with a magneto-inductive flow meter. Sampling points are installed at the bottom and top flow points. The flow rates in them can be determined by means of a measuring cup and a stopwatch. To determine the solid concentration, a balance and a drying chamber are recommended. Using a suitable analysis device (such as a diffraction spectrometer), a separation function can be produced and the separation size determined. Quartz powder is recommended for use as the solid.
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Process Control Eengineering
Ion Exchange Demonstration Unit
Ion Exchange Demonstration Unit is a self-contained benchtop unit, which incorporates two vertical transparent tubes mounted on a panel. The tubes contain the respective cation and anion resins. A manifold arrangement allows the flow configuration to be changed. A rotameter, connecting hoses, a separate sump tank with suction pipe and pump for regenerant, test water or wash solutions complete the set-up. A conductivity meter connected to the outlet of the second ion exchange tube gives a continuous indication of the progress of demineralisation. The unit has been designed to demonstrate the use of ion-exchange resins for either continuous water softening or demineralisation.
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Process Control Eengineering
Level Control Demonstration Unit
This training system provides a comprehensive experimental introduction to the fundamentals of process control using an example of level control. All components are clearly laid out on a vertical panel. The large-format process diagram provides an aid to understanding. A pump transfers water from a storage tank into the transparent process tank. The level is measured by an electronic pressure transducer installed at the base of the process tank. The controller used is a state-of-the-art digital industrial controller. The actuator in the control loop is an electromagnetic proportional valve. A ball valve in the outlet enables defined disturbance variables to be generated. 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.
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Process Control Eengineering
Level Control Trainer
This teaching and training system provides a comprehensive experimental introduction to the fundamentals of process control using an example of level control. A pump transfers water from a storage tank to the transparent process tank. The liquid level is measured by an electronic pressure transducer installed at the base of the process tank. The controller used is a state-of-the-art digital industrial controller. The actuator in the control loop is a pneumatically operated control valve with an electro-pneumatic positioner. A ball valve in the outlet line enables defined disturbance variables to be generated. 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. The well-structured instructional material outlines the technological fundamentals and provides a step-by-step guide through the experiments.
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Process Control Eengineering
Multi-Process Control Trainer
This control trainer is a comprehensive unit featuring only industrial components. It contains a transparent tank for liquid-level and pressure control, a corresponding pipe for flow control, and a two-circuit system with a plate heat exchanger for temperature control. Alternatively, a pneumatically operated control valve or a speed-controlled pump are used as actuator. The parameters of the digital controller can be adjusted over wide ranges so that a large number of different process conditions can be investigated. Electronic sensors measure the individual process values. A three-channel recorder with current inputs is included for recording the control behavior over time. Software for the process visualization and Profibus card are available as an accessory.
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Process Control Eengineering
Networking of Industrial Controllers
One of the aims of process automation is to monitor and control plant or plant components centrally from a computer. This task performed by a process control system. This trainer demonstrates the operation of a process control system based on a simple application. The trainer consists of two process controllers interconnected via a field bus interface (Profibus DP) and an interface card with a PC. On the PC, an OPC (OLE for Process Control) server makes the controller data available to other programs under Windows for further processing.Two potentiometers permit the simulation of input signals for the controllers. The controlled variable, manipulating variable and reference variable data are delivered as standard signals at lab jacks, enabling the controllers to be integrated into real processes at any time. Clearly structured instructional material outlines the fundamentals and provides a step-by-step guide through the exercises.