Chemical Automation

SOFTWARE HMI

Mancin develop a new PLC control system, piloted by a software called MES, which supervises all the process management activities. Thanks to this software all the variables are video and temporally-graphically memorized, and the graphs are printable. All the settings are shown on a big size monitor. The general control panel is shown in the figure.

MES is able to set:

- Process Pressure;

- CO2 flow rate and feeding pump flow rate;

- The temperature of each single vase, reactor or exchanger;

- Boiler temperature;

- Chiller temperature;

- Warning and emergency stop alarms.

MES is able to visualize:

- The pressure before and after every single vase, for the evalution of pressure losses;

- The temperature of each test point;

- The pumps flow rate in Kg/h;

- The amount of CO2 pumped during the cycle;

- All the warming messages;

- Real tie graphs with limits indications;

- Valves position and temperature control.

MES communicates with the PLC via 10/100 Mbit Ethernet protocol. The control panel is also visible in remote mode through a VPN connection on the Internet. A sophisticated warnings management system has been implemented. Seven different intervention levels were created, and they interact with the PLC providing information, warnings and emergency stops due to malfunctionig. The graphs has real time zoom functionality, with visualization of operative limits and set points.

PROCESS DESIGNER

The process design gives you the opportunity to build your working cycle, step by step, exactly how you want.

The initial analysis of the product design identifies constraints on physical and chemical properties. These constraints are used to generate design candidates that can have different compositions and shapes may be different. The composition, the shape and the physical properties of each of these product candidates to determine the processing operations necessary for its production.
A flow diagram - PFD - (or of the system flowchart - SFD) shows the relationships between the major components of the sistema.PFD catalogs the process values for driving the components in different modes of operation, minimum, typical, normal andhighs. A PFD does not show minor components, piping systems, piping judgments and designations.
A PFD should include:

Process piping
Major equipment symbols, names and identification numbers
Control, and the valves which affect the operation of the system
Interconnection with other systems
Major bypass and recirculation lines
Evaluation system and operational values as minimum flow, normal and maximum, temperature and pressio

The flow chart provides a visual representation of the phases of a process. The construction of a flow diagram is often one of the first activities of an effort to improve the processes, due to the following advantages:

It gives everyone a clear understanding of the process
It helps to identify the individual transactions
It facilitates teamwork and communication
It keeps everyone on the same page

The individual steps which need to perform to create a new process are:

Draw the process flow diagram.
Identify each step.
Write a function that describes the identified steps.
Concatenate functions.

All done.

You have just created a new process.