Functional diagram of mixing heat exchanger automation

Introduction

Currently, many industries are characterized by the widespread introduction of automation and mechanization in production processes.

Due to the introduction of the latest technology and automation of technological processes, labor productivity increases, the quality of products is improved, and scrap losses are reduced.

Automatic process control system (ECS) is a set of controlled object and automatic regulator interacting with each other. At the same time, the main element of the system is an adjustable object.

Automation of technological processes is carried out on the basis of pneumatic and electric regulators, operating both independently and in various combinations with electric, hydraulic and mechanical devices and devices. At the same time, the progress of the technological process, the productivity of the plants, the quality of the products produced and the state of the technological equipment depend on the quality of operation of automatic systems.

The purpose of the course work is to familiarize with the principles of building modern process automation systems implemented on the basis of industrial controllers and computers. Currently, such systems are widely implemented in enterprises. During the course work the following tasks are solved:

1) familiarization with the procedure for development of functional process automation schemes based on mass-produced devices and industrial controllers;

2) familiarization with the characteristics of modern instruments and automation tools;

3) study of the main approaches to reasonable selection of automation devices and equipment;

4) study of existing standards and other regulatory documents regulating the rules of technical documentation for automation of technological processes.

Development of functional automation diagram

2.1 List of controlled and controlled parameters

Automatic regulation:

- hot water temperature (steam flow rate);

- hot water flow rate by level in apparatus 1;

- hot water flow rate by level in collector 2.

Computer measurement and registration:

- hot water flow rate;

- hot water temperature.

Measurement:

- hot water flow rate;

- cold water pressure;

- level in set 1;

- level in collection 2.

Alarm:

- temperature in apparatus 1;

- level in collection 2;

- water pressure.

Automatic Lock:

- disconnection of stirrer at disconnection of pump H1;

- switch off the agitator when steam is cut off.

Management:

- actuation and disconnection of H1 pump engine;

- agitator engine actuation and deactivation.

Management System Software

SCADA systems are designed for monitoring and dispatching of remote objects. The main task of SCDONBASS systems is to collect information about many remote objects coming from control points, and display this information in a single control center. Also, the SC¼ system should provide long-term archiving of the received data.

Trace Mode is selected as the SCDONBASS system. Trace Mode allows you to monitor and control the neutralization process from several different screens.

The program is designed to perform the following tasks:

a) displaying on the screen information on the status of the process, alarm signals, messages, trends and other necessary information;

b) operational process control from the functional keyboard in automatic and manual modes;

c) accumulation of information with the required frequency;

d) issuing reports and messages to the printer;

e) implementation of necessary mathematical calculations .

Conclusion

During homework, the specified technological process was studied, a functional automation scheme was developed based on mass-produced devices and industrial controllers. The main approaches to reasonable selection of automation devices and equipment were studied.

During the homework, the characteristics of modern instruments and automation tools were familiarized, the SIMATIC S71500 controller and input modules were selected, and a specification for automation tools was drawn up.

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