Digital coal yard integrated information management system
2021-06-23
2212
I. Overview
Digital coal yard is an important link in the development of digital power plant, based on the existing safe and efficient network platform, database platform and advanced control system of the power plant, using Web technology, wireless transmission technology, intelligent sensor integration, database and three-dimensional technology and other IT technologies and advanced management ideas for the operation and management of the coal yard of the power plant, so that the coal yard management personnel, coal transmission operators, power generation operators can grasp the dynamic storage situation of the coal yard in time. It enables coal yard managers, coal transmission operators, power generation operators to grasp the dynamic storage situation of the coal yard in time, providing accurate and timely on-site coal combustion information for coal distribution and firing, and boiler combustion personnel to grasp the amount and quality of coal in the coal storage yard in advance, so as to adjust the combustion mode in advance according to the unit load and boiler combustion situation, thus achieving safe and economic combustion and energy saving.
II. Functional structure diagram
III. Network topology diagram
IV. System Introduction
4.1Coal Yard Information Management System
The coal yard information management system aims to grasp coal yard information in real time, obtain all relevant data required for coal yard control directly or indirectly, and effectively correlate the relevant data, display the quantity, quality, price and other information status of various materials in the yard in real time through data processing in the form of 3D digital coal yard, complete the comprehensive and refined management of the yard, and provide a mature, advanced and perfect information system management platform for enterprises.
Realize real-time acquisition of accurate data of each incoming coal batch, including mine location, supplier, quality, weight, etc.
Realize digital coal yard overview. The global information such as the current status of all coal yards is displayed visually and dynamically, including the plane condition of the yard, the quantity of incoming and outgoing stocks, the quality information, the unit price of materials, etc.
Realize the management of coal field real-time status. Integrate access to the measurement data of the coal tray system to build a digital model, and display the coal yard status in real-time graphics. Through the combination of 3D and 2D graphics, it intuitively displays the real-time coal storage situation in the coal yard, including coal type, coal storage quantity, tender list, stacking time, all information of stacking location, etc.
4.2Coal Yard Coal Distribution Management System
It can divide the coal yard into several areas according to the actual needs of coal yard management in power plants, and based on this, it can realize the information of the quantity, quality data and storage time of different areas of the coal yard in a three-dimensional dynamic manner by various categories or comprehensive forms such as coal quality, region and mine site. According to the actual coal stockpile and the quality of coal stockpile in the coal yard, the economic proportion of coal on each coal type is calculated through intelligent blending algorithm. The system can query the actual coal quality and coal quantity data of each executed blending and burning plan. Coal of different types and qualities are screened, crushed and proportionally blended to achieve complementary coal quality, optimize the product structure and adapt to the coal quality requirements of customers' coal-fired equipment, so as to improve coal combustion efficiency and reduce pollutant emissions.
4.3Disc coal pick-up system
4.3.1 Fixed Laser Disc Coal System
Installing 1 set of 3D laser coal pan system on the top of coal shed, which can scan the coal field without dead angle and can realize real-time data for data collection application of intelligent coal combustion control platform. Realize remote real-time scanning and monitoring of coal field information, and through integration with intelligent coal combustion control system, automatically generate three-dimensional images of the coal field and display coal field graphics online in real time Realize remote real-time scanning and monitoring of coal field information, and can automatically generate three-dimensional images of the coal field and display coal field graphics online in real time.
The laser scanning and 3D imaging technology is fully utilized, as well as the extraction of effective boundary conditions from 3D image formation to provide data basis research results for automated material extraction.
The 3D laser scanner is installed above the coal shed horse path for easy access and maintenance.
The stacker reclaimers are installed with high precision positioning system, anti-collision system, flow detection system, monitoring system, 3D data analysis system, etc., and a set of high precision belt scale is installed for each stacker reclaimer. It is able to locate the stacker reclaimers accurately and realize the remote automatic control of the stacker reclaimers. Through the human-machine interface and video monitoring system to achieve remote automatic control of the stacker reclaimer, should be able to achieve automatic addressing, automatic stacking, automatic reclaiming and other functions, and in the human-machine interface can get a variety of stacker reclaimer operating status indicators and fault information. In the central control room, in addition to the emergency button, to achieve soft and hard direct control of the stacker reclaimer, and with on-site monitoring images. The system has local manual, local full-automatic, remote manual, remote full-automatic operation modes, between various modes to achieve two-way manual and automatic non-intrusive switching, to improve operational efficiency and system safety.
The unattended control of stacker reclaimers has the following basic functions：
Automatic Addressing: The system has automatic addressing function to realize fully automatic start-up of relevant equipment. According to the operation mode and one-key selection of coal pile from remote operator station (coal pile number and coal seam), the system automatically calculates the positioning operation point and locates it automatically.
Automatic stacking:The automatic stacking can choose the way of fixed-point stacking by walking car or fixed-point stacking by moving belt machine, and the height of stacking is detected in real time by material height detection device. The stacking height and width should be self-setting, and the system automatically adjusts the moving speed of the mobile belt machine and the forward (backward) speed of the car, without manual intervention in the whole process.
Automatic pick-up:The stacker reclaimer automatically starts to take material according to the process automatically after starting the relevant equipment (the amount of coal to be taken can be set according to the need). The control system automatically controls the feeding step and the lifting of the movable beam until the feeding process is completed. The stacker reclaimer control system automatically adjusts according to the set value of the coal taking volume to maintain a constant flow of coal taking, without manual intervention throughout the process.
Real-time coal pile measurement：During the operation of the stacker reclaimer (including manual mode, automatic mode), the coal is measured in real time, and the background software builds a three-dimensional model of the coal pile in real time as the basic data for unattended control, with a modeling frequency of 1 Hz. coal pile data is updated in real time at the remote operator station of the stacker reclaimer, and at the same time, coal pile data (graphics) can be manually deleted and mistakenly deleted at the remote operator station of the stacker reclaimer with one key recovery, and in the graphics Server for coal pile data (graph) history playback.
Realize anti-collision warning and control：Through the use of centralized control system and system software calculation, laser anti-collision detection and microwave radar anti-collision detection 3 kinds of soft and hard combination of real-time anti-collision monitoring of the single machine, the single machine adopts the first alarm prompt, the second alarm stop two protection to ensure the safe operation of the large machine.
Remote video monitoring of production operations：Digital network cameras are installed on the key viewpoints and parts of the stacker and reclaimer, and through the industrial TV network, the video signal is connected to the centralized IP network video monitoring system, which can monitor the working condition of the material yard as well as the position of the big car and equipment status information in real time to ensure the safety and reliability of the automatic operation of the stacker and reclaimer.
4.4Coalfield Safety Monitoring System
4.4.1The Need for Coalfield Safety Monitoring
Long-term contact between coal and air will lead to oxidation reaction and release heat. Although the heat in the outer layer of the coal pile can be emitted, due to the slow air flow and poor ventilation inside the coal pile, resulting in the accumulation of internal heat, the temperature inside the coal pile becomes higher and higher, and when the temperature exceeds the spontaneous combustion point of coal, spontaneous combustion will occur, causing great damage to personnel and equipment. At the same time, the spontaneous combustion of coal will also produce carbon monoxide, methane and other toxic and harmful gases. In the current form of national vigorous implementation of environmental management, real-time effective monitoring of coal pile temperature has huge social and economic benefits, and is an important part of the implementation of "digital coal yard", which is very necessary.
4.4.2Diagram of coal yard safety monitoring system
Infrared temperature measurement system, using the characteristics of non-contact temperature measurement and spatial temperature measurement of infrared thermal imaging camera, realizes real-time temperature monitoring of each location of coal pile to prevent fire. The infrared thermal imaging online monitoring fire warning system can divide the whole coal yard into multiple sub-regions according to the site situation, and set the temperature alarm value and abnormal temperature rise conditions for each area. to verify the processing. At the same time, the system can also establish a linkage mechanism with on-site fire protection facilities, and the alarm signal can be given directly to the fire alarm device, which triggers the fire protection water cannon and other fire protection facilities to act and automatically carry out cooling treatment. It realizes three control modes: centralized fire alarm, local manual fire cannon, and remote control room visual operation manual, and self-tracing automatic detection and fire extinguishing control mode.
4.4.4Hazardous gas and dust concentration monitoring
Combustible gas and dust concentration detection: combustible gas detectors and combustible gas controllers (gas detectors installed above the coal pile to detect changes in the concentration of methane (CH4), carbon monoxide (CO) and other gases) are mainly used for closed coal yard fire, high combustible gas concentration alarm, and hard-wired to link the relevant ventilation equipment.
4.4.5Conveyor belt online monitoring system (belt open fire coal monitoring system)
