I. Background

At present, as China's enterprises continue to improve the level of industrialization, the lack of energy and the increasing demand for energy in society has become a prominent contradiction that restricts the continuous progress and development of society. According to the experience of developed countries, with the continuous promotion of industrialization and industrial production level, the proportion of chemical energy consumption will continue to increase and reach about 33% of the total energy consumption, and ultimately will exceed the production of industrial, transportation and other industries and ultimately become the first place of energy consumption. Among them, the national coal power chemical and large-scale enterprise chemical annual power consumption accounts for about 22% of the total power consumption of chemical production capacity, the annual power consumption per square meter is 10 to 20 times that of an ordinary residential home, Europe, Japan and other developed countries of the same kind of chemical 1.5 to 2 times.

In this context, according to the research and practice of the energy community in the past 30 years, it is now generally recognized that chemical energy saving is the most potential, most direct and effective way of various energy-saving pathways, one of the most effective measures to alleviate the contradiction between socio-economic development and insufficient energy supply, and it will also become the primary factor to improve the energy usage rate of the society. In this regard, it is urgent to put forward a set of comprehensive, dosage system and effective integrated solutions for energy consumption management.

Second, the construction objectives

The project aims to build a complete real-time management digital platform integrating chemical energy consumption real-time measurement and dosage, statistical analysis and automatic dosage system through the chemical energy consumption integrated dosage management system, and the measurement and dosage system realizes the openness and transparency of the energy consumption data under the premise of guaranteeing the information security to achieve energy consumption quota management and no-cost and low-cost energy management, and to establish a set of scientific energy consumption management system.

Overall design program

The automatic dosage system integrates cloud computing, Internet of Things technology, intelligent security isolation "firewall" and centralized management mode, and adopts layered and distributed integration design idea to build a set of energy-saving supervisory platform for production organizations with strong reliability, high efficiency and high degree of sharing, based on guaranteeing the information security of the whole dosage system. The platform is based on a powerful production chemical energy consumption monitoring database, realizes the informatization function of production chemical energy consumption monitoring, and gradually carries out various businesses such as energy efficiency evaluation, energy consumption standard, energy efficiency public announcement, energy consumption quota, energy conservation service and so on based on the complete on-line comprehensive evaluation model of energy consumption and on-line statistic module of energy saving.

The overall architecture of the overall solution includes on-site equipment layer, network communication layer and monitoring management layer. Adopting distributed system topology, the interface of production ERP automatic control system and the network interface of chemical substance energy consumption monitoring system utilize the equipment network in the weak power system as the carrier, which ensures the economy and practicability of the dosing system and can avoid repeated investment.

3.1 Field equipment layer:

Batching control system on-site data terminal acquisition device adopts programmable controller, the hardware device has strong communication ability: comes with RS485 communication interface, supports master-slave MODBUS-RTU protocol; supports data timing sending; can connect with electric meter, water meter, flowmeter, frequency converter, etc., at the same time, it can be used as the I/O remote station of DCS or PLC, it has strong network ability, supports Ethernet/GSM wireless communication; powerful dosage scale, single station scale AIO:32 points/DIO:32 points, dosage maximum scale AIO:16384 points/DIO:16384 points; and can do the user program code, configuration data is permanently saved, not affected by the power outage, the CPU module real-time data preservation is optional; follow the IEC61131-1 international standard of configuration language. Maintain the standard flexible at the same time, realize the multi-faceted transformation of the algorithm, support the concept of sub-algorithm block, algorithmic graph element binding and can provide interface support for third-party algorithm access.

3.2 Network communication layer

Based on the powerful communication function of programmable controller hardware, the weighing control system actively collects relevant data through standard Modbus-RTU protocol to the metering instrument with remote transmission function installed at each energy and water point under monitoring, and transmits and summarizes the data to the energy-saving supervisory platform of the production organization in a centralized and unified way through the GPRS wireless module in the form of GSM. GPRS is a kind of new mobile communication service, which establishes a connection between mobile users and data network, providing high-speed wireless IP or X.25 service to mobile users. GPRS is a new type of mobile communication service, establish a connection between mobile users and data network, provide high speed wireless IP or X.25 service to mobile users, GPRS adopts packet switching technology, each user can occupy more than one wireless channel at the same time, at the same time a wireless channel can be shared by more than one user, the resources are effectively utilized, the data elaboration rate is as high as 160Kbps, the use of GPRS communication to realize the data packet sending and receiving, the user can send and receive data through GPRS wireless module by GSM communication. GPRS communication is used to send and receive data in groups, users are always online and billed according to the flow rate, which is high-speed and reduces the service cost.

The GPRS-based chemical energy consumption energy saving supervision and safety system has the following features:

a) Always online: GPRSDTU can be automatically attached to GPRS network as soon as it is switched on and establish communication link with data center to receive and send data from user data equipment at any time, which is powerful and has high real-time performance;

b)Billing by traffic: GPRSDTU is always online, charging according to the number of data packets received and sent, and not charging when there is no data traffic delivery, saving costs;

c)High-speed transmission GPRS network transmission speed can be as fast as 160Kbps, the speed depends on the mobile operator's network settings, according to China Mobile's network, it can currently provide 20~40Kbps stable data transmission;

d) the network is simple, rapid, flexible, GPRS wireless system can be built through the Internet network at any time, any place, covering the whole of China's virtual mobile communications quasi-purpose network for the vast number of small and medium-sized users to provide access to the convenience of access to save access investments

3.3 Monitoring Management System

The energy-saving supervisory platform of the production organization is based on the monitoring system for centralized analysis, judgment, evaluation, management and record. The monitoring management software integrates project manager, system hardware configuration software, real-time database, history record configuration, device manager, screen development system, alarm configuration management software, algorithm editor, time series analysis software and WEB server, and a single software can realize on-site data acquisition, algorithm execution, real-time database and history data processing, alarm and security mechanism, process control, screen display, trend curve and report output, as well as the monitoring system. display, trend curve and report output and monitoring network. Each part runs on different hardware platforms and interacts various data, management and control information through the control network and dosage system network, so as to complete the functions of the whole chemical energy consumption, energy saving, supervision and safety system in a coordinated manner.

Fourth, the function of feeding system

Chemical energy consumption energy-saving supervision and dosage system integrates supervision, control and management. It mainly realizes the following functions:

(1) Comprehensively manage all kinds of energy-using equipment, establish a panoramic database, collect energy consumption monitoring data, establish energy consumption data model, and provide data basis for later energy consumption data analysis and energy-saving diagnosis.

(2) Carrying out statistical analysis of energy consumption data, analyzing, judging and evaluating the composition of energy consumption, change rule and energy utilization efficiency, etc., to provide qualitative or quantitative basis for the later energy-saving transformation effect assessment.

3）According to the results of energy consumption data analysis, determine the level of energy consumption, put forward a complete set of diagnostic procedures for energy consumption, and carry out energy-saving diagnostic work, and arrive at energy-saving diagnostic results.

4）Integrate all kinds of chemical dosage management systems, establish an energy consumption evaluation system, optimize the design of chemical energy saving according to the results of energy-saving diagnosis, and come up with energy-saving transformation plans.

5）Implement the energy-saving program, reform the energy-using equipment, manage the energy-using habits, and comprehensively realize the goal of chemical energy saving through the intelligent batching system.