Temperature adjustable three-way pipe boiler SCR denitration equipment

Abstract

The invention discloses temperature adjustable three-way pipe boiler SCR denitration equipment, which comprises a flue gas channel, wherein the surface of the flue gas channel is provided with a gas inlet pipe, a three-way pipe is installed on the top end of the gas inlet pipe, one end of the three-way pipe is connected to a steam heater through a pipeline, and one side of the steam heater is provided with an electromagnetic valve. According to the present invention, one side of the flue gas channel is provided with the steam heater through the gas inlet pipe, and when the temperature of the gas in the flue gas channel does not achieve a specified temperature value, the electromagnetic valve on one side of the steam heater is opened to allow the flue gas to enter the steam heater, such that the flue gas is treated by the steam heater to increase the temperature of the flue gas, and the temperature of the flue gas is increased to the temperature range required for the denitration so asto improve the flue gas denitration efficiency; and the first flue gas heat exchanger, the second flue gas heat exchanger and the third flue gas heat exchanger are arranged on one end of the steam heater, such that the flue gas denitration efficiency can be accelerated when the flue gas temperature is higher than a specified temperature region.

Description

technical field [0001] The invention relates to the technical field of boiler tail gas SCR destocking, in particular to a three-way tube boiler SCR denitrification device with adjustable temperature. Background technique [0002] With the successive promulgation of national environmental protection policies, boiler tail gas emission standards have been raised repeatedly, and the emission concentration of nitrogen oxides has become lower and lower. Under the use of existing SNCR and SCR denitrification technologies, the boiler can basically meet the national requirements during normal operation. The conventional SCR reactor generally draws flue gas from the high-temperature economizer of the boiler and enters the SCR reactor through the flue for denitrification, and then introduces the flue gas into the tail flue of the boiler through the flue. However, because the SCR destocking reaction requires a specific temperature range ( 320-420 ℃), the temperature is too low, the cat...

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Problems solved by technology

[0004] The existing boiler SCR denitrification flue gas temperature adjustment device is time-consuming and laborious in the process of temperature adjustment, and it is not easy to control the flue gas temperature, resulting in a decrease in the rate of flue gas out of stock

[0005] The existing boiler SCR denitrification flue gas temperature adjustment device generally discharges the gas directly after the flue gas is out of stock, but because the flue gas contains a large amount of toxic substances, direct discharge will cause pollution to the environment

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