Low emission technology and complete set of equipment for pollutant in flue gas from garbage power generating boiler

Abstract

The invention discloses an ultra-low emission technology and a complete set of equipment for pollutants in flue gas from a garbage power generating boiler. An SDA reactor, a bag-type dust collector, afirst adsorption tank, a regeneration tank and a gas-liquid separator are sequentially connected, the gas-liquid separator is connected with a neutralization tank and an oxidation decomposition towercorrespondingly, the oxidation decomposition tower is connected with a second adsorption tank, flue gas enters the SDA reactor, dry injection is conducted, the bag-type dust collector absorbs a largeamount of acid and adsorbs dust in the flue gas, and obtained gas enters into the first adsorption tank, the regeneration tank continues to absorb heavy metals, dioxins and oxidized NOx in the flue gas, and adsorption and regeneration are alternately performed. Regenerated gas enters the gas-liquid separator to separate gas and liquid, and the obtained liquid flows into the neutralization tank and reacts with sodium alkali or ammonia water in the neutralization tank, the gas enters the oxidation decomposition tower and enters the second adsorption tank after oxidation, purified smoke obtainedby two-stage adsorption is emitted, regenerated gas after the second stage adsorption also returns to the gas-liquid separator for secondary oxidation and absorption until emission standards and ultra-low emission requirements are met.

Description

technical field [0001] The invention relates to the technical field of pollutant absorption, in particular to an ultra-low multi-pollutant emission process and a complete set of equipment for waste-to-energy boiler flue gas. Background technique [0002] In recent years, my country's urbanization process has accelerated, and the number and scale of cities have continued to expand. However, due to the serious lag in environmental protection infrastructure, the pollution of urban ecological environment by urban waste has become increasingly serious. It is estimated that by 2020, the amount of urban waste generated will reach 323 million tons, and the harmless treatment of waste is imminent. The main way to deal with waste incineration in cities is incineration, and the tail gas produced by waste incineration contains CO 2 , SO 2 , NO X etc. In addition, some toxic gases will be produced, including particulate matter, dioxin, etc. [0003] The temperature of flue gas from w...

AI Technical Summary

Problems solved by technology

Relying on this process combination, it can meet the national emission standard GB18485-2014, but it is difficult to meet the EU emission standard 2000 / 76 / EC, and the ultra-low emission that is better than the EU emission standard 2000 / 76 / EC is far from reaching

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