A utility boiler waste heat utilization system

Abstract

The invention provides a boiler waste heat utilization system for a power station. According to the system, a main flue regulating valve is arranged on a main flue; a bypass flue regulating valve is arranged on a bypass flue; the system further comprises a flue temperature sensor; the flue temperature sensor is used for measuring the temperature of discharged flue gas; a central controller is in data connection with the temperature sensor, the main flue regulating valve and the bypass flue regulating valve; the central controller automatically adjusts the opening degree of the main flue regulating valve and the bypass flue regulating valve according to the temperature, measured by the temperature sensor, of the discharged flue gas. According to the invention, through the valve control, the flow of the flue gas participating in waste-heat utilization and heat exchange is adjusted to automatically control the temperature of the discharged flue gas, so that low temperature corrosion is avoided and the intelligent adjustment of the system is realized.

Description

technical field [0001] The invention belongs to the field of steam boilers, in particular to the field of waste heat utilization of steam boilers. Background technique [0002] With the rapid development of my country's economy, energy consumption is increasing day by day, and the problem of deteriorating urban air quality is becoming more and more prominent. It is urgent to save energy and reduce the emission of harmful environmental substances. In the common steam generation process, one of the main reasons for high energy consumption and serious pollution is that the exhaust temperature of boiler flue gas is too high, which wastes a lot of energy. Therefore, the waste heat of boiler exhaust gas is recovered and reused to achieve energy saving and emission reduction. purpose, while protecting the environment. However, in the prior art, low-temperature corrosion may occur while satisfying the residual heat of the flue gas, so how to avoid low-temperature corrosion is an im...

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Problems solved by technology

However, in the prior art, low-temperature corrosion may occur while satisfying the residual heat of the flue gas, so how to avoid low-temperature corrosion is an important issue. At the same time, if only to avoid low-temperature corrosion, the waste heat in the flue gas is wasted Too much, leading to the problem of poor utilization of waste heat, so the above-mentioned related problems need to be solved urgently

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