Device and method for measuring nitrogen oxide components in tail gas from thermal power plants
A technology of nitrogen oxides and measuring devices, applied in measuring devices, analytical materials, instruments, etc., can solve problems such as pipeline blockage, high dust content, and increased equipment maintenance costs, achieving less equipment, low maintenance costs, and long-term maintenance. Measure the effect of collection
Inactive Publication Date: 2015-10-21
周志国
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Problems solved by technology
Such equipment usually requires a long pipeline to transport the sample gas. In the exhaust gas of the thermal power generation process, the dust content is relatively high. Using a long pipeline to transport the sample gas for analysis will easily cause pipeline blockage; the gas in the flue has a high temperature of about At around 200 degrees, high-temperature gas needs to be protected during transmission, which needs to increase equipment maintenance costs
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Embodiment Construction
[0028] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0029] Please see attached figure 1As shown, a thermal power plant tail gas nitrogen oxide component measurement device includes exhaust flue 1, sample gas collection pipe 2, first solenoid valve 3, sample gas filtering system, third solenoid valve 8, second dust Storage chamber 9, sample gas measuring chamber 10, nitrogen and oxygen sensor 11, pressure sensor 12, fourth solenoid valve 13, fifth solenoid valve 14, compressor 15 and gas return pipe 16; the flue gas passes through the exhaust flue 1 , the flow direction of the flue gas is shown by the arrow, one end of the sample gas collection pipe 2 communicates with the exhaust flue 1, and the sample gas collection pipe 2 is perpendicular to the exhaust flue 1, When the downstream gas generates negative pressure, the gas in the exhaust flue 1 enters the downstream sampling system through the sample gas...
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The invention discloses a device for measuring a nitric oxide component of exhaust generated by electricity generation in a thermal power plant. The measuring device comprises a draught flue, a sample gas collecting pipe, a first electromagnetic valve, a sample gas filtering system, a third electromagnetic valve, a second dust storage cavity, a sample gas measuring cavity, a nitrogen and oxygen sensor, a pressure sensor, a fourth electromagnetic valve, a fifth electromagnetic valve, a compressor and a gas return pipeline, wherein the sample gas collecting pipe is connected with the draught flue; the first electromagnetic valve is arranged on the sample gas collecting pipe; a filtering gas cavity is connected with the sample gas measuring cavity; a plurality of layers of filter screens are arranged in the filtering gas cavity; the second dust storage cavity, the nitrogen and oxygen sensor and the pressure sensor are arranged in the sample gas measuring cavity; the second dust storage cavity is connected with the gas return pipeline; the third electromagnetic valve is arranged on the pipeline; the sample gas measuring cavity is connected with the compressor and the gas return pipeline by a tee joint pipeline; the fifth electromagnetic valve and the fourth electromagnetic valve are arranged on a pipeline. According to the invention, automatic cleaning in the measuring system is realized, and the maintenance cost is low.
Description
technical field [0001] The invention relates to the measurement technology of nitrogen oxides in the flue gas of a thermal power plant, in particular to a measuring device and a measuring method for the nitrogen oxide components of the power generation tail gas of a thermal power plant. Background technique [0002] my country's nitrogen oxide emissions are increasing year by year, and thermal power plants are mainly emissions. The emission of nitrogen oxides in the air increases, which is very harmful to the environment: forming smog and acid rain. Therefore, an effective monitoring and measurement technology of nitrogen oxides in the tail gas of thermal power plants is very necessary. At present, the exhaust gas of power plants is widely used. The exhaust technology mainly reduces the nitrogen oxides in the exhaust gas, injects ammonia water, and converts nitrogen oxides into nitrogen. Reduce the harm of power plant exhaust to the atmospheric environment. The "Emission ...
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IPC IPC(8): G01N33/00
Inventor 周志国
Owner 周志国