Spraying type flue gas waste heat recovery and purification system

Abstract

The invention relates to the technical field of flue gas waste heat recovery and purification, in particular to a spraying type flue gas waste heat recovery and purification system. The system comprises a standard gas simulating flue gas generating system, a gas boiler smoke exhausting system and a waste heat recovery and purification system which is connected with the standard gas simulating flue gas generating system and the gas boiler smoke exhausting system. According to the system, by simulating flue gas to simulate the amount of flue gas of different boilers, the problem that the oxynitride in smoke exhausted out of small boilers is little is solved; and by testing the actual smoke exhausting amount of the boilers and performing mutual justification on the actual smoke exhausting amount of the boilers and simulated flue gas, the result can be more accurate, the requirements of different heat users can be met, the flue gas can be purified, pollution of exhausted smoke on environment is reduced, the flue gas utilizing rate is increased, and the flue gas can be purified regularly.

Description

technical field [0001] The invention relates to the technical field of flue gas waste heat recovery and purification, in particular to a spray type flue gas waste heat recovery and purification system. Background technique [0002] The main component of natural gas is methane, which will produce a large amount of water vapor after combustion. Since the exhaust gas temperature is generally 180-250 °C, part of the sensible heat and all latent heat in the water vapor will be discharged into the atmosphere together with the exhaust gas, and then Pollutants such as nitrogen oxides and fine particulate matter are also emitted along with the flue gas. In order to reduce energy waste and protect the environment, it is necessary to recover and purify the waste heat of flue gas. [0003] The existing waste heat recovery methods include indirect heat exchange and direct heat exchange. Due to the large heat resistance of the pipeline, the indirect heat exchange occupies a large area, t...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a spray-type flue gas waste heat recovery and purification system, which can solve the problem of insufficient heat exchange and high exhaust gas temperature in the existing waste heat recovery method, which cannot recover the latent heat in the flue gas. Acidity of aqueous solution after spraying

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