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Denitration system flue gas multi-point sampling system

A sampling system and flue gas technology, applied in the field of denitrification, can solve the problems of inability to realize flexible switching between single-point sampling and multi-point sampling, poor applicability, single function, etc., and achieve the effects of good sealing, low cost and accurate sampling results.

Pending Publication Date: 2021-11-23
国能南宁发电有限公司 +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Among them, the multi-rod sampling method of the direct extraction method is widely used, but the existing multi-probe sampling scheme has the disadvantages of high cost, single function, and can only realize simultaneous sampling of all probe rods, and cannot realize single-point sampling and multi-point sampling. Flexible switching, poor applicability

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] In the description of this patent, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying References to devices or...

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Abstract

The invention discloses a denitration system flue gas multi-point sampling system, which comprises sampling probe rod units, a pipeline switching device and a sampling dilution device, the sampling probe rod units are arranged in a flue at intervals and are connected to the pipeline switching device through sampling pipes, the pipeline switching device is connected with the sampling dilution device, and the sampling and diluting device is connected with the gas analyzer. According to the invention, the pipeline switching device is arranged to realize switching of multi-point or single-point sampling of flue gas, so that the requirements of flue gas sampling under different conditions are met, multiple sampling modes are provided, and the adaptability is high; the pipeline switching device and the sampling feeler lever unit are linked through the control device, so that automatic switching of sampling modes is realized; and the pipeline switching device is used for switching pipelines, so that the sampling system has the advantages of good sealing performance, accurate sampling result, low failure rate and lower cost.

Description

technical field [0001] The invention relates to the technical field of denitrification, in particular to a multi-point sampling system for flue gas of a denitrification system. Background technique [0002] Thermal power plants have implemented continuous measurement of fixed pollution source emissions for more than ten years, and the previous mainstream technology was single-point measurement. With the further improvement of the denitrification efficiency, the size of the flue is too large, the straight pipe section is too short, the distribution of the concentration field is uneven, and the representativeness of the single-point sampling measurement of the online pollution source measurement is poor. Affected by factors such as changes and adjustments, the problem of excessive ammonia injection is more prominent when the coal type changes, the boiler load changes, and the burner is adjusted. In some power plants, the life of the denitrification catalyst will be shortened a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24
CPCG01N1/2258G01N1/2247G01N2001/2264
Inventor 刘柱金鑫魏凤巍钟洪玲劳俊朱金伟兰晓华巩伟国
Owner 国能南宁发电有限公司
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