Ammonia escape monitoring device

Abstract

An ammonia escape monitoring device comprises: an analyzer; a measuring probe, wherein the measuring probe is electrically connected with the analyzer, the measuring probe comprises a measuring channel, and light-transmitting pieces are arranged at the two ends of the measuring channel in a sealed mode, so that a sample gas cavity is defined between the measuring channel and the light-transmitting pieces, a gas inlet channel connected with the sample gas cavity is arranged on the side wall of the measuring channel, so that flue gas enters the sample gas cavity through the gas inlet channel, and a gas outlet channel communicated with the sample gas cavity is arranged on the side wall of the measuring channel, so that flue gas in the sample gas cavity is discharged out of the sample gas cavity through the gas outlet channel.

Description

Technical field [0001] The present invention relates to the field of gas analysis, and more particularly to an ammonia escape monitoring device. Background technique [0002] With the implementation of the overall emission policy of thermal power plants, flue gas pollutant emissions are increasingly strict. Most thermal electrical units use SCR denitration technology to improve denitrification efficiency, and react with NOx produced by spray in catalysts. NOX removal, but in actual production, because the flue gas distribution is uneven, and as the working conditions change NOx distribution is also random change, it is difficult to ensure that each of the spray valve gates and the corresponding area inlet or export NOx is suitable. The proportional relationship, in order to ensure environmental emissions, most factory areas take over-spray inference to ensure higher denitrate efficiency, resulting in malturization of ammonia and debris, and catalyst poisoning, etc., give safety p...

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Problems solved by technology

[0003] In the related distributed synchronous measurement technology, the extractive measurement scheme is adopted, through the arrangement and combination (mixing / switching) of the sampling tubes, and finally sent to the analyzer to complete the mixed measurement or round measurement of multi-point sample gas, but due to the ammonia gas Due to its special nature, the unreasonable sampling method causes the sample gas to react or adsorb to the inner wall of the pipeline during the transportation process, resulting in inaccurate measured values; and the long sampling pipeline makes the measurement response sluggish. It is difficult to control the flow rate accuracy, so that the measurement data is out of sync, and it is difficult to meet the time accuracy requirements and reference accuracy requirements required by the denitrification optimization control system, which reduces the accuracy of the entire control system and makes it difficult to achieve leveling

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