Boiler thermodynamic system and boiler

Abstract

The invention relates to a boiler thermodynamic system and a boiler. The boiler thermodynamic system comprises an economizer (1). The boiler thermodynamic system further comprises a temperature adjusting device used for adjusting the temperature of smoke at the outlet of the economizer. By means of the technical scheme, the temperature adjusting device of the boiler thermodynamic system can adjust the water temperature or flow in the economizer (1), and therefore the temperature of the smoke at the outlet of the economizer is adjusted. Due to the fact that the outlet of the economizer is communicated with an SCR denitration system, the smoke enters the SCR denitration system through the inlet of the SCR denitration system from the outlet of the economizer, the temperature of the smoke at the outlet of the economizer is adjusted through the temperature adjusting device, then the temperature of the smoke at the inlet of the SCR denitration system is adjusted, and even when the boiler runs in the low-load state, the temperature of the smoke cannot be greatly reduced, in other words, the SCR denitration system can normally run, and the emission of the nitrogen oxide can meet the requirement of the Thermal Power Plant Atmospheric Pollutant Emission Standard.

Description

technical field [0001] The invention relates to a thermal energy equipment system, in particular to a boiler thermal system. The invention also relates to a boiler. Background technique [0002] Flue gas denitrification is another key area for my country to control pollutant emissions from thermal power plants after flue gas desulfurization. In July 2004, my country promulgated and implemented the "Emission Standards of Air Pollutants for Thermal Power Plants", which greatly increased the requirements for the emission of nitrogen oxides from thermal power plants. At present, boilers in thermal power plants generally adopt ammonia selective catalytic reduction SCR denitrification technology, that is, a flue gas SCR denitrification device is installed at the tail of the boiler. However, the core material of the ammonia-based SCR denitrification technology is a catalyst. When the boiler operates at low load and the inlet flue temperature of the ammonia-based SCR denitrificati...

AI Technical Summary

Problems solved by technology

However, the core material of the ammonia-based SCR denitrification technology is the catalyst. When the boiler operates at low load and the inlet flue temperature of the ammonia-based SCR denitrification system is lower than the applicable temperature of the catalyst, the ammonia-based SCR denitrification system does not operate, resulting in boiler nitrogen The concentration of oxide emissions exceeds the requirements of the "Emission Standards of Air Pollutants for Thermal Power Plants"

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