Denitrated flue gas sampling and pretreatment device

Abstract

The invention discloses a denitrated flue gas sampling and pretreatment device and belongs to the field of flue gas discharging and collecting devices. The denitrated flue gas sampling and pretreatment device comprises a sampling heating and filtering unit, a back flushing control unit and an ammonium salt rinsing unit, wherein the ammonium salt rinsing unit is connected with a gas outlet of a sampling heating and filtering cavity by a pipeline, and one end of the back flushing control unit is connected with the gas outlet of the sampling heating and filtering unit. The power consumption of equipment is reduced under the conditions that the sampling unit is automatically controlled to heat by the device, and the ammonium salt is not crystalized; NH3 is completely removed to prevent blockage; the ammonium salt adhered to an ammonium salt rinsing bottle and nanometer rinsing balls can be directly rinsed by clear water and can be recycled conveniently, and besides, the back flushing control unit can exert the back flushing effect as expected on a sampling probe and a filter.

Description

technical field [0001] The invention relates to a flue gas emission collection device, in particular to a denitrification flue gas sampling and pretreatment device. Background technique [0002] With the rapid development of our country's economy, the thermal power generation industry is booming and has become the main power generation method of our country's power supply structure. While electric energy brings us convenience, it also causes some pollution to the environment, mainly due to incomplete combustion of thermal power generation and the generation of by-products. According to statistics, more than 90% of NOx in my country's air pollutants comes from the combustion process of fossil fuels (such as coal, oil, natural gas, etc.), of which 70% comes from the combustion of coal, and the coal used for power generation in thermal power plants accounts for the national coal-fired 70% of. After NOx enters the atmosphere, it is easy to form chemical smog under the action of...

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Problems solved by technology

[0007] Aiming at the problems encountered by the existing flue gas sampling device in the actual use of denitration flue gas, the present invention provides a denitrification flue gas sampling and pretreatment device, which realizes integrated sampling and pretreatment, and has the functions of preventing flue gas condensation and ammonium salt The function of crystallization; at the same time, the ammonium salt cleaning device is used to effectively remove NH in the flue gas 3 , the ammonium salt adheres to the surface of the nano-cleaning beads, which is easy to clean and easy to recycle, and prevents the clogging of the ammonium salt cleaning bottle due to long-term operation

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