Experimental device for low-temperature acid dew point corrosion of power plant boiler flue gas

Abstract

The invention discloses a low-temperature acid dew point corrosion experimental device for power station boiler flue gas. The low-temperature acid dew point corrosion experimental device comprises an experimental platform, a flue gas experimental pipeline, a pitot tube manometer, a cooling system, a heating system, an induced draft fan, a measurement and collection system and a control system, wherein the inlet end and the outlet end of the flue gas experimental pipeline are communicated with a rear flue of a boiler air pre-heater, the pitot tube manometer is arranged at the inlet end of the flue gas experimental pipeline, a first high temperature heat exchanger, a second high temperature heat exchanger, a low temperature heat exchanger and an experimental segment heat exchanger, which are connected in series, are arranged on the flue gas experimental pipeline along the flue gas flow direction, and the cooling system is used for cooling passed flue gas and cooling flue gas in the experimental segment heat exchanger to a low-temperature acid dew point corrosion experimental temperature of 70 DEG C. The experimental device is used for solving the low temperature corrosion problem of a low-temperature economizer for the boiler flue gas and providing the theoretical foundation and the technical support for the popularization and application of novel corrosion resistant materials.

Description

technical field [0001] The invention relates to the field of low-temperature corrosion of power plant boiler flue gas, in particular to an experimental device for low-temperature acid dew point corrosion of power plant boiler flue gas. Background technique [0002] In view of the fact that during the "Twelfth Five-Year Plan" period, the state clearly stated that "to comprehensively promote waste heat and pressure recovery and utilization technology in industries rich in waste heat and pressure resources, promote the recovery and utilization of low-quality heat sources, and form a cascade comprehensive utilization of energy." The key to the utilization of waste heat at low temperature is the acid dew point corrosion of metal materials. If this problem cannot be solved, it will be difficult to realize the deep utilization of waste heat from flue gas. The problem of low-temperature acid dew point corrosion in the deep waste heat utilization process of utility boiler flue gas is...

AI Technical Summary

Problems solved by technology

At present, the problem of low-temperature corrosion mechanism has not been completely solved at home and abroad. Conventional low-temperature corrosion mitigation measures are usually costly, difficult to process, and affect heat transfer performance. Some can only slow down but cannot completely solve the problem of low-temperature corrosion.

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