Based on the Modicon Quantum series PLC to realize design of the control system of limestone powder grinding - Industrial control

because the country is becoming more and more attention to environmental protection, to the enterprise standard emission regulation, so as to promote the industrial USES wet flue gas desulfurization technology is widely used. And wet desulfurization of raw material is limestone powder, thus the limestone powder quality and production demand is higher and higher, so you need to have the advanced level, high reliability of control system.

the programmable controller ( PLC） , is designed for industrial environment application and design of industrial control computer, has become the most widely used in the control system of the core position, it can realize complicated logic control not only, also can complete all kinds of sequence or timing of the closed-loop control functions, and strong anti-jamming capability, high reliability, good stability, small volume, can under the bad environment for a long time, continuous operation, and programming is simple, easy maintenance, and is equipped with all kinds of communication interface and module processing, convenient expansion.

1, lime stone powder grinding process description

limestone powder grinding is the most critical in preparation of limestone powder to ensure the quality of limestone powder processing equipment. It is composed of roller, mill, reducer, classifier, main motor, auxiliary motor, seal fan, tensioning structure, hydraulic lubrication station, cooling water.

the whole process including the key points of data collection and record, technological process of the switch, the switch control of cooling water pump, the classifier speed control, pressure control of hydraulic lubrication station, lime stone powder, difference of temperature in the grinding pressure and level control, production equipment running status monitoring, etc. , so much for operating equipment and complex process, need complex automation control. The diagram below: The # 1 line has been put into production, # 2 line in the works)

2, lime stone powder grinding production monitoring system running environment

( 1) In the production process, there are a lot of physical quantities, such as temperature, pressure, level, flow analog parameters, need through the PLC real-time acquisition and processing of these parameters.

( 2) The whole production process of analog automatic control and fault diagnosis.

( 3) The whole process of sequence control and real-time alarm and interlock protect downtime.

3, the structure of the control system

limestone powder grinding control system USES the Modicon Quantum series programmable controller. The system consists of four industrial PC and PLC through a network switch ( Redundant configuration) For the 10 base - a physical structure Between T local area network (LAN), industrial PC and PLC data through Ethernet communication, data transfer rate of 10 MBP/s. The whole control system is composed of the main system and extension system, responsible for working with field measurement and control section, the data transmission between the shoulder the whole production process, the logic of process control, alarm and interlock, etc. 4 industrial PC machine are running Windows, Professional operation platform is divided into two upper machine operator station, running ifix3. 5 configuration software, the realization of monitoring, operation, report printing, accident analysis, and other functions; Another one for the engineer station, run Quantum Concept2 series. 6 configuration software to realize logic control, logic and parameter modification, on-line monitor, etc; And a station for communication interface, complete with 6 kv high-voltage integrated by 485 cable protection of data transmission. Configuration in the form of structure with double Ethernet, ensure the continuity of the automation control system, improve the reliability of equipment operation, ensure the safety in production. The system configuration as shown in the figure below.

4, hardware configuration,

( 1) In order to meet process control requirements, the control center research China's industrial control computer is adopted, its configuration is:

CPU Intel Ⅳ 2 p. 4 gb, 256 MB of memory, hard disk 80 gb, soft get rid of 3. In 5, cd-rom 52 x, colorful display PHILIPS flat, 21 101 + optical mouse keyboard.

( 2) Modicon Quantum CPU - series 434 - 12

( 3) Modicon Quantum series 8 channel analog input module block (11 Includes thermocouple, heat resistance)

( 4) Modicon Quantum series 8 channels of analog output module 2 pieces

( 5) Modicon Quantum series 32 channels of digital input module 7 pieces of

( 6) Modicon Quantum series 32 channels of digital output module three

( 7) Modicon Quantum series Ethernet communication module 2 pieces

( 8) Modicon Quantum series remote I / 0 communication module 3 blocks ( 1 Lord, from the 2)

( 9) Modicon Quantum series power module 6 pieces

configuration of the main work is to complete the hardware model parameter is set, the distribution of the I/O address, transport, etc. The use of Modicon Quantum Concept2 series PLC special programming software. 6 for the configuration. Specific process is: open the Concept2. 6 - File - New project, double-click the PLC Selection to choose the CPU model - > OK, double-click the Config Extensions - double click the Select Extensisns - double click the Select Extensisns, in the dialog box of the TCP/IP Select number of Ethernet network - > OK. Double-click on the I/O Map, click on the Head the setup button - > select number of RIO, this number is given priority to the I/O communication module in the main back slot number (occupied From the I/O communication module according to his own will randomly placed in extension) →好。

usually, 1 and 16 slot placed the power module

2 tank placed CPU module

3 slot to prevent the main I/O communication module

4 and 5 slot placed redundant Ethernet communication module

6 to 15 place I/O module slot.

hardware configuration diagram is as follows:

5, software configuration

in this system, PC using ifix3. 5 configuration software, the machine adopts Modicon Quantum Concept2 series.