Application of the hottest real-time database in p

The application of real-time database in the papermaking industry

Introduction China's papermaking enterprises are basically pulp and paper enterprises, and the raw materials are mainly non wood fibers. Domestic wood pulp only accounts for about 10% of the total national pulp production, and the output of low-grade paper accounts for about 50% of the total output. Due to the lack of wood resources and the rich and low-cost grass resources in China, maintaining the production of a certain amount of straw pulp will still be the objective and actual situation of papermaking in China for a long time in the future. The performance of straw pulp is obviously inferior to that of wood pulp. Straw pulp has many shortcomings and deficiencies, such as short fiber, poor performance of Luzhou water, high silicon content and high viscosity of black liquor, resulting in high pollution load per ton of pulp and difficult governance

generally speaking, China's paper industry is far behind the world's advanced level in production technology, equipment level and enterprise information management, mainly due to high energy and material consumption, low efficiency and poor product quality. Therefore, we should vigorously rely on scientific and technological progress, constantly carry out technological upgrading and information transformation, strengthen the precise control of the production process, save energy and reduce consumption, and improve the core competitiveness of the whole industry in the international market

the whole production process of Yuanjiang Paper Co., Ltd. (hereinafter referred to as Yuanjiang paper) is mainly composed of one pulp workshop and three paper workshops. Raw materials are mainly reed and wood; The pulping workshop completes the pulping task, and the paper workshop produces different types of paper products according to the proportion difference of pulp, as shown in Figure 1

overview of real-time database technology

in order to obtain extremely fast responses to updates and queries and meet the needs of real-time applications, the concept, technology, method and mechanism of database and real-time system are seamlessly combined to produce real time database (RTDB). Real time database is a database whose data and transactions have explicit timing constraints. Under the condition of time constraints, the consistency of shared data is guaranteed. The correctness of data not only depends on the logic results, which have many strange characteristics in the fields of electricity, optics, acoustics, mechanics, heat, etc., but also depends on the generation time of logic results and the time consistency of the data used to derive results

compared with the traditional relational database, the real-time data system not only attaches importance to data consistency, but also highlights the real-time performance of the whole system. In the traditional application field, relational database has achieved great success with strict mathematical foundation, simple and clear concept, and easy to understand and use. However, it is helpless in the face of modern engineering (especially in the field of industrial control) and time critical application fields. On the one hand, enterprises hope that the data platform can provide high-speed, timely real-time data services, effectively integrate heterogeneous control systems, and provide distributed data services. On the other hand, it is hoped that it can establish a real-time data connection between the factory control layer (fieldbus, DCS, PLC, etc.) and the MES system, so as to combine the whole production process control and business management of the enterprise. At the same time, it is also a data platform for process simulation, advanced control, real-time optimization, and the whole production process management system. These problems cannot be completely solved only by the acquisition and control system (DCS) and relational database technology

the paper industry solution

adopts the ESP ISYS process monitoring integrated platform of Zhejiang zhongkong Software Technology Co., Ltd., that is, the production monitoring system, which realizes the networking management of the enterprise's production workshop, reflects the production status of important equipment in the workshop in the form of flow chart, and reaches a new height in the collection, storage, decision analysis and process monitoring of real-time production data, It also provides extensive and standard OPC, ODBC, API and other data interfaces, and establishes a powerful data platform for other applications

esp ISYS real-time database system is a multi-layer distributed application system in the paper industry. This distributed application system is divided into three layers: field data source service layer, real-time data platform layer, and real-time data platform application layer based on Web services

the field data source service layer is mainly the control system of each device. In this item, the control system involved in synchronously drawing force angle, force displacement, angle displacement and other curves includes:

the real-time database platform processes the collected real-time data, and finally publishes it to end users through the application layer of the real-time data platform based on Web services

application effect

after the successful implementation of the system, the company's production scheduling and command information platform was established, which realized the system integration, sharing and monitoring of production process and production information, and improved the company's production management level

integrated papermaking specifications and standards, process parameters, inspection and testing information and quality judgment information, strengthened quality supervision and realized the whole process quality management

a scientific and effective graphical production scheduling and scheduling model is established, various resources are reasonably allocated, the measurement of sound absorption coefficient and acoustic impedance by strong standing wave tube method standardizes the connection between GBJ 88 (85) production processes, optimizes production organization, and improves production efficiency

realize the monitoring and intervention of key production process parameters, improve and enhance