Online detection system of smoke concentration of multi-data mode SCR reaction chamber, and control method thereof

Abstract

The invention provides an online detection system of smoke concentration of a multi-data mode SCR reaction chamber, and a control method thereof. The system comprises a sampling module, a patrol detection module, a standby detection module, a plurality of four-way tubes (170) and a logic control cabinet (150); during normal operation, the patrol detection module performs patrol detection on the smoke concentration of a single measurement point on one side of the SCR reaction chamber, the standby detection module detects the average smoke concentration on the other side of the SCR reaction chamber, the detection of a smoke measurement point can be completed just within 60s, when the patrol detection module is faulty, the standby detection module replaces the patrol detection module to execute a single-point flue gas concentration patrol detection function, which not only improves the system operation reliability and the equipment utilization rate, but also can quickly obtain diversifieddata about the smoke concentration of the SCR reaction chamber, ensure that the flue gas concentration on both sides of the SCR reaction chamber is always under monitoring, and provide more data supports for optimizing the boiler operation.

Description

technical field [0001] The invention relates to an SCR reaction chamber flue gas concentration detection technology in the field of environmental protection technology, in particular to a multi-data mode SCR reaction chamber flue gas concentration online detection system and its control method Background technique [0002] The Ministry of Environmental Protection of China requires strict monitoring of various indicators of air pollutants in the flue gas of thermal power plants. more stringent requirements. At present, most thermal power plants use Selective Catalytic Reduction (SCR) for denitrification, and the amount of ammonia injection in the SCR denitrification system has an important impact on the denitrification efficiency. The amount of ammonia injection is too small, the denitrification efficiency is low, and the NOx concentration of the exhaust flue gas is too high, which may exceed the emission standard limit. If the amount of ammonia injected is too large, the e...

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Problems solved by technology

[0004] In order to solve the problem of single type of data for obtaining the flue gas concentration in the SCR reaction chamber in the prior art and the low reliability of the system operation, the present invention provides a multi-data mode SCR reaction chamber flue gas concentration online detection system and its control method, through Set up a backup detection system, which can detect the single-point smoke concentration on one side of the SCR reaction chamber while detecting the average concentration of smoke on the other side of the SCR reaction chamber, and increase the reliability of the system operation and improve the quality of the equipment. Utilization of

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