An ultra-low emission intelligent environmental protection island system for coal-fired power plants

Abstract

The invention discloses an ultra-low emission intelligent environmental protection island system for a coal-fired power plant. The system includes a data collection unit, a data transmission unit, a data storage unit, a data processing unit and a visual monitoring system, wherein the data collection unit includes a unit operation state detector and a CEMS detector, the data transmission unit includes multiple wireless modules for transmission of acquisition data, the wireless modules are in communication connection with the unit operation state detector and the CEMS detector, the data storageunit is disposed in a memory of a computer terminal, the data acquisition module is in communication connection with the computer terminal, historical data in the data storage unit is modeled by the processing unit and is then transmitted to the visual monitoring system, and the data is visually displayed by the visual monitoring system. The system is advantaged in that low-cost and high-yield operation of an ultra-low emission intelligent environmental protection island is realized without increasing hardware facilities, real-time monitoring is realized, and stable and reliable operation of the system are guaranteed.

Description

technical field [0001] The patent of the invention relates to the fields of energy, environmental protection and information technology, in particular to an ultra-low emission intelligent environmental protection island system for coal-fired power plants. Background technique [0002] The total amount of air pollutant emissions in my country is huge, heavy pollution occurs frequently in a large area, and the problem of regional air pollution is becoming more and more prominent; my country consumes about 3.6 billion tons of coal every year (accounting for more than 50% of the world), and coal combustion emits about 67% of NOx , About 90% of SO2 and about 40% of soot, coal consumption per unit area and pollutant emission intensity in key areas are several times or even ten times that of developed countries in Europe, America and Japan, which is one of the main causes of serious air pollution. With the promulgation of the "Notice on Printing and Distributing the Action Plan for ...

AI Technical Summary

Problems solved by technology

[0005] 1. The operation of pollutant control equipment in coal-fired power plants basically adopts a pyramid-style manual management method, and the pollutant removal process is often dynamic. high difficulty

Some power plants have a single fuel, and the control is relatively easy to implement; while some power plants use fuel blending to reduce costs, and the back-end flue gas components fluctuate greatly, making control relatively difficult

Although some power plants use feedback closed-loop control, considering different combustion and pollutant control processes, as well as equipment characteristics and sampling delay issues, closed-loop control is difficult to achieve the expected real-time and accuracy;

[0006] 2. The measurement error of the online instrument is relatively large. Since the flow state of the flue gas in the flue is turbulent, the distribution of the flue gas at different positions in the same section is uneven and the difference is large.

In actual production, this problem can only be solved by increasing the number of on-line instruments, but enterprises have to consider cost issues, so the number of increases is limited, and the effect is often not obvious;

[0007] 3. The delay of the instrument measurement data is relatively serious, and sampling takes a certain amount of time

Most of the current CEMS is extraction type, that is, the flue gas in the flue is extracted into the analysis instrument, and the sampling time is greatly affected by the length of the sampling tube

Moreover, the data stored in the existing DCS system is limited, and accurate prediction cannot be achieved;

[0008] 4. The accuracy of the control equipment is not high, and the manufacturers are different, and the characteristics of the equipment vary widely. Even if the same batch of products from the same manufacturer, the characteristics of the equipment cannot be consistent, which causes some troubles for the on-site personnel and increases the control difficulty;

[0009] 5. The synergistic effect is not good, the systems are relatively independent, and it is impossible to consider the overall situation

This technical solution only measures the CO / CO2 component content of exhaust emissions, and the measurement component is single, which is not convincing

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