ISAP - INGENIEURBUERO GERHARD SCHULZE AUTOMATION ENGINEERING

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Environmental Simulation Plants
Pacing and Analytical Systems


Keywords:
cascade action control - climate - environment - pollutant gas concentration - humidity - measure and control engineering - pacing and analytic systems - process analysis - process control - research and development - simulation plants - software simulation - temperature - test installation

 

In the area of environmental engineering we offer the planning and the realization of application- oriented pacing -, analytics and simulation plants. The plants are used by industry for quality protection of the running production and by science for fundamental research.

To minimize the operating expenses the plants are maximal automated and maintenance-free. The essential plant parameters are temperature, humidity, useful or pollutant gas concentration, deposit and radiation. This parameters are controlled by regulating units, measuring elements and automatic controller units of a process control system for constant or defined variable values to realize diurnal variations.

By the modular disign of our process control systems (hardware and software), it is easy to modify the plants for changed requirements.

To ensure an optimized technical and economic solution it is very important to have a good planning and an early communication between all project participants. Thus, if possible, our team of chemists and engineers co-operate with the costumer already at the fixing of the requirements.
Fig.: Dr. Henning Mangels at a
start-up procedure of a humidity pacing system
Fig.: Frontpage of the first CITplus 1/98
Order Publication "Schadgase dosieren und regeln"

 

Overview Project Examples:
Simulation Plant for Climate and Gaseous Pollutants Atmosphere (R&D)
Pollutant Gases Pacing and Analytic System of a Simulation Plant
for microbiologically influenced Corrosion (R&D)
Pacing Station for Oxygen Enhancement (Industry)

For more information about our project management, please click here:

  Project Management/Development of application-oriented Plants and Devices

 

Simulation Plant for Climate and Pollutant Gases Atmosphere (R&D)

The simulation plant is designed for testing the relevance of chemically influenced corrosion of natural sandstones. In conditioned reactors (changing temperature and humidity) test-stones are exposed to defined concentration of pollutant gases (SO2, NO2, NO, CO2) up to 10 times higher than the normal smog situation. After a defined exposing time the stones are subjected to a chemically analytic.

The controlling is - a multi-computer process system. The plant components are connected to the process computer, which communicates with the service computer. On the service computer the user builds the functional structures, sets the desired values and sets and evaluates the data recording.

The pacing of the pollutant gases is - mass-flow controller. The measuring of the gas concentrations and of the humidity is - ultraviolet-fluorescence, chemoluminescence and undispersive infra-red analyzers.

Commission:
planning and implementation of a pollutant gases pacing and humidity pacing system with multi-computer process control, documentation and start-up procedure.

Fig.: Hot-cold-chamber with humidity and pollutant gases pacing / process computer / measuring data on the operational computer
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Pollutant Gases Pacing and Analytic System of a Simulation Plant
for microbiologically influenced Corrosion (R&D)

The simulation plant is designed for testing the microbiologically influenced corrosion of natural sandstones. In a two-chamber cabinet the stones are exposed to exactly equal concentrations of pollutant gases, temperatures and high humidity. In one chamber the solely chemically influenced corrosion is tested in the other chamber the stones are exposed additional to nitrifying bacteria.

The plant operates fully automated, even during longer periods. The user operates the system from one visual display unit. In this surface all relevant parameters are shown in real-time. The service is vastly reduced by the changing of the desired values, set the calibration modus and the evaluation of the data recordings.

The controlling of the pollutant gas concentrations is realized by a process computer. The plant devices are connected to the process computer with analogue and digital I/O-cards. The feasibility of a gas concentration controlling has been tested in the pre-planning. The control loops are built with software controller, mass-flow controller as final control elements, chemical luminance- and flame-photometer analyzers as measuring means.

Beside the precision regulation of the pollutant gas concentrations at high humidities, with this plant for the first time an automatically cycled switching between pacing and regulating of the pollutant gas concentrations in both chambers could be realized, so that only one measuring mean (analyzer) for each gas was necessary.

Commission:
pre-planning, final planning, implementation of a pollutant gases pacing and analytic system with multi-computer process control, documentation and start-up procedure.

Fig.: main rack with process computer / pollutant gases pacing und zero-air conditioning / mass-flow controller / visual display unit (full size view: click onto the figure)

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Pacing Station for Oxygen Enhancement (Industry)

Fig.: Oxygen pacing station
 The oxygen pacing is realized by a digital flow cascade action control with seperate measure and final control elements. The pacing desired value can be set at the digital controller or in the control room. Because of the low pacing rate (0.02 - 0.2 lb/h) and because of the variable counter-pressure (174 - 435 psi), before the build-up of the plant we worked out a feasibility study by software-simulation with using the theoretical transfer functions of the single control loop elements.

commission:
planning and realization of a power supply equipment, a signal transformer unit, programming und implementation of a digital controller, process analysis and optimizing of the controller parameter, documentation and start-up procedure.

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Last update: 01-Jan-2009