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Steam injection boiler touch screen central control system XY-KZ-3100 Introduction The XY-KZ-3100 steam injection boiler touch screen central control system of Chongqing Xinyi Automatic Control System Engineering Co., Ltd. The steam injection boiler touch screen central control system is a new generation control system successfully developed by our company based on the existing steam injection boiler control system. It uses a programmable controller as the The central controller realizes boiler ignition control, feed water flow adjustment, water and fire automatic tracking, and fuel temperature control through the collection and processing of system variables and status. At the same time, the real-time data and status of the boiler are uploaded to the local display touch screen and the host computer in the duty room through communication. The local display touch screen has a good human-machine interface, which can centrally monitor, manage and control parameter settings of the boiler system, and transmit the set parameters and operating instructions to the programmable controller to achieve real-time detection and control of the boiler. The operator can centrally monitor, manage and control parameter settings of the boiler system through the host computer, and transmit the set parameters and operating instructions to the programmable controller. ； Improved system operation reliability ； With the help of the host computer, the storage of operating parameters and status of the steam injection boiler and the printing of management reports can be completed. Figure 1 1. Characteristics of the control system 1. Simple and compact structure: The programmable controller realizes ignition program control, water and fire tracking adjustment and fuel temperature control, eliminating the need for ignition programmer, setter, offset device, water meter, fire meter and other devices. Modular relays are used to make the system more concise and compact. 2． High reliability: Applying advanced design concepts and using software to replace hardware greatly reduces system components, thereby improving system operation reliability. 3. Easy management and operation: The host computer and touch screen integrate status, variable display and system operation, and the full Chinese menu display makes operation easier. 4. High maintainability: The system has a self-diagnosis function and can display fault information in a timely and intuitive manner, allowing the operator to quickly handle the fault. ； With the modular structure design, system operation can be quickly restored by simply replacing the corresponding modules, thus improving the maintainability of the system. 5. Strong extension function: The system is equipped with a communication interface and can be connected to the production and management network through wired or wireless means when needed, providing a good platform for automated production and management. 2. System composition The touch screen central control system of the movable steam injection boiler is composed of system power distribution, frequency conversion adjustment, display control and host computer. 2.1 System power distribution The power distribution system uses busbar power supply to distribute power to the inverter, blower, air compressor, and electric heater respectively. ； Use Schneider electrical components to improve the reliability of system operation. Figure 2 Frequency adjustment Figure 3 System power distribution Figure 4 shows that the control uses a three-phase isolation transformer to provide clean power to the control system and improve the system's ability to resist interference. 2.2 Frequency conversion adjustment uses communication to receive the water volume setting value from the touch screen, and converts it into the frequency converter output frequency to adjust the water supply flow of the plunger pump. ； Upload the frequency converter output frequency, voltage and current to the touch screen for display. 2.3 Display control uses shielded wires to connect the temperature signal of the boiler to the control system through the integrated temperature change module. ； Using a high static pressure differential pressure transmitter to replace the original pneumatic differential pressure transmitter improves the accuracy and reliability of system operation. The programmable controller collects and processes system variables and status, uploads the touch screen display through communication, and accepts control instructions and setting parameters from the touch screen at any time. The programmable controller completes the control of actuators such as regulating valves, solenoid valves and dampers in the boiler system. ； Realize the control of ignition process, automatic tracking of water and fire volume, and fuel temperature adjustment. The touch screen completes centralized monitoring, management and control parameter setting of the boiler system. 2.4 Based on the characteristics of the boiler, the host computer is equipped with a laptop or industrial computer, as well as a UPS power supply and a printer. PLC communicates with the host computer through communication adapter through communication cable. Configuration software is used to form the system process of the steam injection boiler, various reports, real-time curves and historical curves of parameters to achieve centralized monitoring and management of the boiler system. 3. The touch screen operation interface adopts a true color touch screen, which can adapt to harsh working environments and provide good visual images. ； The full Chinese menu display makes operation easier and observation more intuitive. The operation interface includes the following sub-interfaces. 3.1 Steam injection boiler system flow chart: Displays the real-time detection values, cumulative quantities, and corresponding status of boiler system processes and important variables. (See Figure 5) Figure 53.2 Adjustment control: Display the water volume and fire volume when the boiler is running, set the adjustment value of the water volume and the tracking volume of the fire volume, display the fuel temperature and realize automatic adjustment of the fuel temperature. (See Figure 6) Figure 63.3 Ignition and starting of the furnace: Complete the ignition and start-up of the furnace and the start-stop operation of the equipment, and the ignition process will be displayed. (See Figure 7) Figure 73.4 Status alarm: Monitor the boiler system for alarm conditions. (See Figure 8) Figure 83.5 Real-time curve: Track important variables for boiler system operation. (See Figure 9) Figure 93.6 Data report: Displays real-time data from the boiler system. And form a historical data report for query (see Figure 10) Figure 103.7 Parameter settings: Set system operating parameters. (See Figure 11) Figure 113.8 System Help: System operating instructions. (See Figure 12) Figure 12 4. Host computer operation interface The steam injection boiler automatic control system, as the central control system of the steam injection boiler, can run on the Windows98/NT/2000/XP operating system. It has a friendly and convenient user interface similar to Windows. It adopts a full Chinese menu display mode, which is easy to operate and intuitive to display. The system sets up strict user rights management to ensure the safe operation of the system. The user interface contains the following sub-interfaces. 4.1 Steam injection boiler system flow chart: Displays the flow picture of the boiler system process and the real-time detection values and cumulative quantities of important parameters, indicating the execution status of key actuators. (See Figure 13) Figure 134.2 Adjustment control: Display the water and fire volume values when the boiler is running, set the water volume adjustment value and fire volume tracking volume, display the fuel temperature PID adjustment curve, and realize the fuel temperature PID adjustment parameter setting and the automatic adjustment of the fuel temperature. (See Figure 14) Figure 144.3 Ignition and starting of the furnace: Complete the ignition start-up program control and equipment start-stop operation, display the ignition process and ignition program fault alarm. (See Figure 15) Figure 154.4 Status detection: Monitor the operating status of the input and output channels of the boiler system. (See Figure 16) Figure 164.5 Historical Curve: Track important variables in boiler system operation and provide parameter change curves to analyze boiler operation quality (see Figure 17) Figure 174.6 Data report: Displays real-time data from the boiler system. (See Figure 18) Figure 184.7 Parameter settings: Set system operating parameters. (See Figure 19) Figure 194.8 Alarm processing: Display, process system alarms and form alarm history. (See Figure 20) Figure 20