A flue gas waste heat utilization and its automatic pollutant control system

Abstract

The invention provides a flue gas waste heat utilization system. The flue gas waste heat utilization system includes a heat pipe, a flue gas pipeline and an air passage, the flue gas pipeline is internally provided with a flow sensor, the flow sensor is use for detecting the flow V of flue gas, a pm2.5 detector is arranged on an inlet section of an electrostatic / ultrasonic coupling dust removal section, and the pm2.5 detector is used for detecting the pm2.5 concentration N2 on the inlet position; the pm2.5 detector is in data connection with a central control unit, and the control unit automatically adjusts the power of an ultrasonic generator according to detected data of the pm2.5 concentration N2 and the flow V. The invention provides the waste heat utilization system with a novel structure and an intelligent processing device of the waste heat utilization system, the electric field intensity can be comprehensively controlled according to the pm2.5 concentration N2 and the flow V, the intellectualization of the system is realized, and waste heat utilization is improved.

Description

technical field [0001] The invention relates to the fields of heat pipe waste heat recovery, flue gas dust removal and organic matter removal, in particular to a system for recovering flue gas waste heat by using heat pipes. Background technique [0002] Heat pipe technology is a heat transfer element called "heat pipe" invented by George Grover of Los Alamos National Laboratory in the United States in 1963. It makes full use of the principle of heat conduction and phase change medium. The rapid heat transfer properties of the heat pipe quickly transfer the heat of the heating object to the heat source, and its thermal conductivity exceeds that of any known metal. Compared with the most commonly used shell-and-tube heat exchanger in coal-fired flue gas waste heat recovery, the heat pipe heat exchanger has the advantages of high heat transfer efficiency, compact structure, small pressure loss, and is beneficial to control dew point corrosion. There is more potential in waste...

AI Technical Summary

Problems solved by technology

[0004] Electrostatic precipitator + wet electrostatic precipitator technology is an important technical route to achieve ultra-low emission standards, but wet electrostatic precipitator operation and investment costs are high

Another technical route to achieve ultra-low emissions is to optimize the wet desulfurization device for efficient and coordinated removal of particulate matter. This technology needs to meet the dust concentration at the outlet of the front-end electrostatic precipitator ≤ 20mg / m 3 Even ≤10mg / m 3 , it is difficult to meet the current operating conditions of electrostatic precipitators in power plants

In addition, the emissions from coal-fired power plants will also produce a certain concentration of organic pollutants, such as alicyclic hydrocarbons, straight-chain hydrocarbons, benzene series, and polycyclic aromatic hydrocarbons. The removal of pollutants is an important research field for environmental safety.

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