The flue gas monitoring system is primarily related to monitoring.High-polluting industry emissions.To a large extent, the environment has been protected and is conducive to the sustainable development of society, especially in the highly polluting public sector, such as fire power.
There are also many issues that need improvement in the power generation of fire, which directly affect the proper operation of the flue gas monitoring system.Flue gas monitoring systems primarily monitor gas emissions from relevant high-pollution industries.To a large extent, the environment has been protected and it is conducive to the sustainable development of society, especially in the highly polluting public sector, such as fire power, and the improvement of the monitoring system requires that our relevant personnel be realistic and should not forget their responsibilities so as to guarantee the normal functioning of the flue gas monitoring system.
As the country enters the twenty-first century with its economic development leading to the development of various fields, the industrial sector has grown, while environmental problems have become the biggest obstacle to the modernization of our industry. Air pollution is the first issue to be studied in the context of environmental pollution. In order to reduce the emissions of sulfur dioxide, nitrogen oxides and to enable the country to achieve good and rapid development in an environmentally sound environment, it is incumbent upon it to study the smoke monitoring of the fire and electricity industry, and pollution control based on the collection of parameters is the primary issue in the management of the modern fire and electricity industry.
1 Introduction to the on-line smoke detection system
On-line monitoring of flue gases is the continuous automatic monitoring of the concentration of particulate matter and gaseous pollutants from fixed sources of pollution, as well as the total emissions of pollutants, using specific instruments, while associated environmental equipment, such as desulphurization and denitration, are also monitored and managed through the use of on-line monitoring of flue gases, thus achieving pollution control. The on-line monitoring system for flue gas consists of four main components of the gaseous pollutant detection subsystem (for continuous monitoring of gaseous pollutants in the flue gas), the gas parameters monitoring subsystem (for measuring the condition parameters of the flue gas temperature, pressure, flow speed, etc.) and the particulate matter detection subsystem (mainly for real-time measurements of concentrations of smoke and dust), data collection and treatment subsystems (mainly for gas data processing and transmission). The gaseous pollutants monitored by the fire power industry are usually sulfur dioxide and nitrogen oxides, sulfur dioxide and nitrogen oxides floating in the air, creating a range of environmental problems. Monitoring emissions from sources of pollution is a source of data and foundation for environmental protection and an important basis for measuring environmental pollution levels and controlling pollution.
2 Common problems in the on-line smoke detection system
2.1 Sampling system blocked
Blockage of the sampling system is a common problem in the on-line monitoring system for flue gases, which mainly refers to sampling probes, sampling tube or filter core congestion, causing data instability in the on-line monitoring system for flue gases and thus not being a standard for flue gas control. The above-mentioned problems are prone to over-parametering and, in the event of congestion in the sampling system, have a real impact on pollution measurement, attention should be paid to conducting regular checks of filter cores, sampling probes and anti-blowing systems in the actual work of the pneumatic online monitoring system to ensure that each aspect of the pneumatic online monitoring system works well. The method of testing is to analyse the differences in the speed of the flue flow, to observe whether the sampling system before and after the pump is functioning and to rationalize its management.
2.2 Leakage from sampling systems
The leak in the sampling system is expressed in high oxygen concentrations, diluted the parameters of nitrogen oxides, sulfur dioxide in air and caused some data deviation.
The leak in the data sampling system is due to the collapse of the pressure system, which is an important element in ensuring the normal operation of the on-line monitoring system for flue gases, which is able to measure leakage through observation of pre-pump and post-pump pressures and in combination with changes in flue flow. The leak detection method is specifically: the system removes the flue gas import tube from the sample analysis state, blocking the import of the sample gas, if the sample flow meter cannot be reduced to 0L/min within approximately one minute, indicates a leak point within the system cabinet, removes any possible leakage points, and ensures that the on-line smoke monitoring system is back to normal in a timely manner.
2.3 Liquid water on sample pipe routes
The main reason for the occurrence of liquid water is the failure of the heating system, which, if broken, will result in the failure of the online monitoring system and will seriously affect the accuracy of the measurements, causing some difficulty in subsequent pollution control efforts. The failure of the water removal condensation also affects liquid water from the sampling tube, so that the analyzer is preceded by the installation of an air-traffic film and spot protection to prevent serious malfunctions or even complete damage to the core parts of the analyzer.
3 Some measures to optimize the on-line smoke monitoring system
3.1 Periodic updating of the on-line smoke monitoring system
The regular replacement and updating of the on-line smoke monitoring system is an effective guarantee for the safe and stable operation of the on-line smoke monitoring system. General system consumables include, inter alia, sampling components (sampling pumps and pump membranes, worm pumps and their ducts), filtering components (probet filter cores, protective filters, system fine filters, etc.), pre-treatment components (heated pipe lines, condensation fluids, etc.). The retrofitting process is based on equipment usage requirements to establish regular worksheets that take into account the actual situation on the ground, while keeping detailed and accurate records and providing on-line monitoring systems for preventive maintenance to enable effective pollutant control.
3.2 Establishment of quality control laboratories and maintenance laboratories for transport equipment
The establishment of quality control laboratories is an effective way to ensure the accuracy of sampling for the mobile management of the on-line monitoring system for flue gases, which can be optimized to increase the stability of the measurements of the on-line monitoring system for smoke gases and to ensure that, in practice, quality management is carried out at the same time, as a technical guarantee for the on-line monitoring system for smoke gases. The establishment of a maintenance laboratory for transport equipment has enabled failure of the online monitoring system to be detected at the first opportunity and quality issues to be addressed in a timely manner, both guaranteeing continuity in the work of the on-line monitoring system for smoke and improving the reliability of the on-line monitoring system for smoke.
3.3 Establishment of a database of on-line smoke monitoring equipment
In response to the suddenness of the flue gas online monitoring system equipment, The establishment of an online monitoring facility database on flue gases is an effective way of managing dynamic equipment, To be able to overcome the failure of the on-line smoke monitoring system in a short period of time, And there is regular maintenance of ageing equipment. Effective maintenance management of the on-line monitoring of flue gases can be achieved through the establishment of an on-line monitoring equipment database, I would like to add the accuracy and reliability of the on-line flue gas monitoring system. The replacement faulty parts are repaired and can then be used again. Cost savings were achieved for on-line smoke monitoring.
3.4 Sampling System Block Control
Sampling systems for the on-line flue gas monitoring system, which include tertiary precision filters, condensation, heating tubes, secondary precision filters and sampling probe components, can lead to relatively low sample flow and more severe consequences if the sampling system is blocked. We must first identify the specific areas of congestion, using the following method: heaters and sampling probes are usually not easily tested on chimneys or chimneys at a higher distance from the ground, so you can first remove the catheters from the inner section of the cabinet, then analyze them by looking at the flow, sorting them out, mainly through two-tiered precision filters and condensation. However, internal cabinet inspectors need to be highly professional and familiar with the sampling system to ensure the accuracy of the survey results.
Issues for attention in the bypass switch test at 3.5
As a rule, it is assumed that when the side door is opened, the flue gas will go by side, and parameters such as the sulphur content of the mixed flue gas and the temperature of the flue gas will soon rise to a value similar to that of the original smoke. This is not the case, however, because the sidewalls were opened as a result of the wind booster vortex, but a large amount of flue was still sucked into the desulphur pyrotechnics by the pressurizer, and only a small number went through the side pyrotechnics, resulting in online parameters measured from mixed pyrotechnics to the sampling point still being similar to or lower than those measured when the side roads were not opened. Therefore, when the environmental authorities go to the site to check the performance of the side panel, the wind booster will be suspended after the wind booster motor leaves have been phased out, which will ensure that all the flue gases go through the side pipe, so that parameters such as the sulphur content and temperature of the mixed flue gas will soon rise to the same level as the original flue gas. In order to avoid punishment by the environmental authorities, the power plant is supposed to fake a pipe by the side.
4 Conclusion
With the rapid development of the Chinese economy and the increased awareness of environmental issues, energy shortages and the destruction of the ecological environment as a result of industrial development had become an urgent contradiction and were of general concern to all sectors of society. To address this contradiction, the Government has proposed “energy-saving emission reduction” policy measures. The on-line flue gas monitoring system provides a simple and effective method of monitoring pollutants in the flue gas, which is an indispensable environmental device for reducing emissions from the flue gases. It is hoped that, in future developments, there will be wider development space for the on-line smoke monitoring system.