Ammonia nitrogen on-line monitoring instrument

Abstract

The invention discloses an ammonia nitrogen on-line monitoring instrument. The ammonia nitrogen on-line monitoring instrument consists of a sample feeding tube, a sample feeding peristaltic pump, a distillation heating bottle, an alkali liquid sample feeding peristaltic pump, a cleaning peristaltic pump, an air pump, a cooling tube, an absorption bottle, a boric acid absorption liquid sample feeding peristaltic pump and a communication pipeline. According to the ammonia nitrogen on-line monitoring instrument, a conduction measuring method for testing ammonia nitrogen, namely a wet process distillation-conductance method, is established. Comparing an analysis result of standard samples, various kinds of surface water and wastewater with a synchronously-adopted national standard analysis result, various technical requirements of monitoring technology standard are met, so that the instrument is easy to operate, time-saving, labor-saving, efficient and correct; the experiment cost is also reduced; and the instrument is suitable for popularization and application of ammonia nitrogen during on-line monitoring.

Description

technical field [0001] The invention relates to an ammonia nitrogen online monitor, which belongs to the technical field of online monitoring of ammonia nitrogen content in water bodies, and in particular relates to an instrument that can be used for online monitoring of ammonia nitrogen content in surface water, sewage treatment plants and industrial pollution sources. Background technique [0002] Ammonia nitrogen concentration is an important pollutant index in surface water, sewage and other water bodies. At present, the common analysis methods used by the ammonia nitrogen online monitors in the domestic market mainly include: 1. Nessler's reagent photometry; 2. Salicylic acid hypochlorite photometry; 3. Gas-sensitive membrane electrode method, etc. [0003] Most domestic manufacturers use the photometric method, and the pre-treatment for measurement only includes simple steps such as filtration and flocculation. However, organic compounds such as aliphatic amines, arom...

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Problems solved by technology

In addition, due to technical and process reasons, the level of domestic electrodes is not as good as that of similar foreign products, and the price of foreign electrodes is higher

[0005] The measurement results of these methods are compared with the national standard method. For complex wastewater samples, the measurement results are inaccurate and often exceed the error range.

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