The solution of Hongrun instrument used in pollution source online automatic monitoring system

Abstract: the pollution source online monitoring system is an information platform for environmental protection monitoring and environmental early warning The system adopts advanced wireless network, covering water quality monitoring, automatic flue gas monitoring, air quality monitoring, environmental noise monitoring, video monitoring and other environmental online monitoring, fully meeting the requirements of environmental information construction of environmental protection departments at all levels, and supporting environmental monitoring of environmental protection departments at all levels Manage and monitor the environment to meet the management needs of users at different levels Key words: pollution source online automatic monitoring real-time database Hongrun 1 Overview With the development of industrial production, the environment for human survival is facing challenges Due to the gaseous pollutants such as sulfur oxide and nitrogen oxide discharged into the air during our production, the air we breathe is becoming increasingly dirty; a large number of industrial sewage is discharged arbitrarily, the water resources are seriously polluted; urban noise pollution is becoming increasingly serious, which has an impact on human health and ecological environment It has brought great harm "Protecting the environment and purifying the earth" has become a top priority that needs to be solved urgently, and it is an urgent issue for future generations 2 Design of pollution source online automatic monitoring system 2.1 Brief introduction of scheme design Pollution source online monitoring system is an information platform for environmental protection monitoring and early warning The system adopts advanced wireless network, including water quality monitoring, flue gas automatic monitoring, air quality monitoring, environmental noise monitoring, video monitoring and other environmental online monitoring applications; Based on the on-line monitoring of pollution sources, the system fully implements the principles of total amount management and total amount control, including many important functions of environmental supervision information system, fully meets the construction requirements of environmental information network of environmental protection departments at all levels, supports environmental supervision and environmental monitoring of environmental protection departments at all levels, and meets the management needs of users at different levels From the bottom to the top, the pollution source on-line automatic monitoring system can be divided into three levels: pollution source on-site monitoring station, transmission network and Environmental Protection Bureau Center Station 1) the on-site monitoring station is located at each pollution source on-site monitoring point, which can be divided into three parts: on-site instrument, on-site communication network and data acquisition and transmission server 2) the transmission network is responsible for transmitting the data of the on-site monitoring station of the pollution source to the central station of the Environmental Protection Bureau It is divided into two layers: basic transport layer and application layer 3) the central station of the Environmental Protection Bureau communicates with each other through the network transmission layer and the field layer, exchanges data and issues instructions, so as to realize the centralized remote monitoring of the field layer 3 The field communication network of the field monitoring station is responsible for summarizing the data collected by the instrument to the data acquisition and transmission server Standard RS232 / 485 electrical interface, supporting Modbus communication protocol The data acquisition and transmission server is responsible for the collection, analysis, storage of real-time data and data exchange with the upper computer 3.1 field monitoring station instrument: the secondary instrument adopts the NHR full series instrument independently developed by Hongrun, including: nhr-5100a temperature display controller; nhr-1100a liquid level display instrument; nhr-5310 regulator; nhr-5600 flow totalizer; nhr-5800 flash alarm instrument; the primary instrument includes: Hr-wzp thermal resistance; hr-lugb vortex flowmeter; hr-3051 pressure / differential pressure transmitter; hr-fz floating ball liquid level gauge; Hongrun electric / pneumatic control valve; 3.2 instrument parameter setting: nhr-5100 temperature display instrument: parameter symbol name setting range (word) description setting value PN PN input graduation 0-35 Set the input graduation type (see Table 1) 14 (thermal resistance) addr addr device No 0-250 set the device code of the instrument when communicating 1 baud baud communication baud = 0 communication baud rate is 1200BPS 3 baud = 1 communication baud rate is 2400bps baud = 2 communication baud rate is 4800bps baud = 3 communication baud rate is 9600bps pl Measuring range lower limit full range setting input signal lower range range - 199.0 pH pH measuring range upper limit full range setting input signal measuring range upper range 650.0 nhr-1100 liquid level display instrument: parameter symbol name setting range (word) description setting value pnpn input graduation 0-35 set input graduation type (see Table 1) 14 (thermal resistance) Addraddr device No 0-250 sets the device code of the instrument when communicating 1 baud baud = 0 baud rate of communication is 1200bps3 baud = 1 baud rate of communication is 2400bps baud = 2 baud rate of communication is 4800bps baud = 3 baud rate of communication is 9600bps Plpl sets the lower range of measurement limit of input signal under the measurement range - 199.0 PHPH measurement range upper limit full range setting input signal measurement range upper limit 650.0 nhr-5310 regulator: PP proportional band full range proportional band 50.0 II integration time 1 ～ 9999 (× 0.5s) integration time; when the residual deviation generated by the proportional control is set to 9999, the integration does not work 10 DD differential time 0 ~ 1999 (× 0.5s) differential time predicts the change of output, prevents disturbance and improves the stability of control When the setting is 0, the differential does not work 0 t0t0 operation period 1 ~ 200 (× 0.5s) PID adjustment operation period 1 t1t1 output period 1 ~ 200 (× 0.5s) accuracy: 10ms control output period (this parameter is available when the relay or thyristor outputs) 1 autaut self-tuning aut = 0-off aut = 1-switch-manual setting of PID parameter value on-automatic calculation (self-tuning) Note: after the automatic calculation is completed, the PID parameter 0 nhr-5600 flow integrator parameter setting range parameter setting range can be manually modified Formula model 0-28 Temperature compensation lower range full range flow measurement select 0-1 temperature compensation upper range full range equipment No 0-250 pressure compensation lower range full range communication baud rate 0-3 pressure compensation upper range full range temperature compensation input type 0-35 flow input lower range full range pressure compensation input type 25-35 flow input upper range full range Flow (linear, differential pressure) input type 25-36 flow input small signal cut off full range working condition atmospheric pressure full range flow coefficient 10-999999 flow / heat energy selection 0-1 working condition density 0-999999 3.3 field monitoring station system network: The primary instrument on site transmits the collected temperature, liquid level and flow signals to the secondary instrument All secondary instruments of Hongrun adopt standard MODBUS RTU protocol, through the function code + register address mode and the workstation IPC for data acquisition and control, because the Hongrun secondary instrument adopts 485 transmission, it is necessary to install 485 / 232 converter between the instrument and the workstation IPC, the communication distance of 485 is up to 1200m, and the communication distance can be extended by adding loop resistance and relay module 4 Transmission network construction: because the monitoring points are scattered in different areas and widely distributed, and most of them are set in the areas with bad environment, GPRS wireless network is adopted in this scheme for wireless data transmission Pollution monitoring equipment will collect the pollution data and alarm information, through GPRS network, and send them to the environmental protection supervision department in time, which can realize the timely management of pollutant discharge units or individuals, greatly improve the work efficiency, and provide a new way for environmental protection 5 The central station of environmental protection bureau is composed of Hongrun enterprise level real-time database, relational database, web server and client software to realize various query and analysis functions The client uses the career6.0 platform of Hongrun technology to comprehensively monitor the pollutant emission of the enterprise and transmit the real-time picture of the enterprise site to the Environmental Protection Bureau ◆ real time monitoring management realizes the visualized management of pollution sources, which realizes the comprehensive, real-time and networked monitoring system of pollution sources Just observe the icon style or color of each enterprise on the screen to understand the equipment operation of each pollutant discharge outlet of all enterprises; at the same time, you can browse the detailed monitoring data of enterprise pollutant discharge through tables and curves This enables the staff to have a panoramic view of the equipment operation status, pollutant discharge concentration, flow, discharge amount and other information of all sewage outlets of all enterprises in the same user interface ◆ powerful alarm and early warning functions: provide diversified alarm functions in the form of sound, light color change, color of values in the table, etc The specific value, time, quantity and medium quality of excessive discharge are given, which provides a detailed and reliable basis for strengthening supervision ◆ data statistics and analysis: the pollution source on-line monitoring data and alarm information are classified, summarized and analyzed from multiple perspectives to fully meet various statistical requirements The operation status, pollutant discharge concentration, flow, discharge amount and other information of each sewage outlet equipment, as well as the development trend and dynamics of pollutant discharge outlet are displayed in various forms such as icons, tables, graphs, etc in real time From various perspectives and levels to analyze monitoring data, provide comprehensive reports and statistical charts Statistical analysis reports and charts can be generated by jurisdiction, industry and pollutant categories ◆ seamless integration with geographic information system The system integrates geographic information system into it, and realizes data query, statistics, environmental mapping, display and other functions based on geographic information, as well as pollution source analysis, regional environmental assessment, early warning and emergency response, environmental decision-making management, etc by using its powerful geographic information analysis function and combining with environmental mathematical model The main functions of system management are: user account management, monitoring element management, pollution industry management, monitoring instrument management, monitoring task management, etc In order to ensure the security of the system data, the system will make a detailed distinction for the user's authority First, the user has a basic authority according to his administrative level For example, the municipal user can query the pollution discharge situation of the city's pollution enterprises, and the district and town users can query the pollution discharge situation of the pollution enterprises within their jurisdiction On this basis, each user gets the corresponding permission according to the nature of his work For example, read-only permission will allow the user to only find information but not modify the data, while editing permission will allow the user to modify the information of the enterprise under his jurisdiction 6 Summarize the introduction of information technology, such as automatic control, network communication, computer and geographic information system, into the field of environmental monitoring, and establish the on-line monitoring system of environmental elements including pollution sources by using the advanced monitoring configuration software Hongrun career6.0 and Hongrun real-time database products, so as to realize the continuous and real-time monitoring of key pollution sources, It is of great significance for strengthening the supervision, total amount control, preventing the occurrence of major pollution accidents, improving the level of environmental monitoring information and the ability of environmental decision-making and management to dynamically grasp the pollution discharge and exceeding standard of key pollution source enterprises.