Intra-furnace flue gas denitration ammonia spraying intelligent system and control method thereof

An intelligent system and flue gas technology, applied in the direction of flow control, non-electric variable control, control/regulation system, etc., can solve problems such as increasing desulfurization cost and equipment corrosion, improve utilization efficiency, avoid equipment corrosion, and reduce popularization and application. the effect of difficulty

Active Publication Date: 2016-09-28
王巧英
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Problems solved by technology

[0004] With the increasingly stringent emission standards for flue gas environmental protection, in order to ensure that the emission standards are met, the usual practice is to inje

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  • Intra-furnace flue gas denitration ammonia spraying intelligent system and control method thereof
  • Intra-furnace flue gas denitration ammonia spraying intelligent system and control method thereof
  • Intra-furnace flue gas denitration ammonia spraying intelligent system and control method thereof

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[0037] In the process of realizing the present invention, the applicant found that since the flue cannot be an infinitely extending long cylindrical structure, it must have a bend. In this case, the flue gas reflects during the movement, and at the same time, the flue The local irregular structure can also cause the swirling motion of the flue gas. These factors work together to cause the flue gas concentration (NO X The unpredictability of concentration). In this case, the use of a static liquid ammonia spray mode will inevitably not meet all the conditions, or it will cause NO X Removal is not clean, or spraying excessive liquid ammonia causes waste.

[0038] In the present invention, a spray plane and a detection plane perpendicular to the extension direction of the flue are defined in the flue, wherein N shower heads are arranged on the spray plane, and M local sampling positions at different positions are arranged on the detection plane, Establish the corresponding relations...

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Abstract

The invention provides an intra-furnace flue gas denitration ammonia spraying intelligent system and a control method thereof. The system includes: N spraying heads which are arranged on a spraying plane; a NOX concentration detection assembly which includes M regional sampling detection units which detect flue at M regional sampling positions on a detection plane and acquire a NOX concentration at each regional sampling position; the spraying plane and the detection plane are arranged in one section of a straight chimney flue and are disposed perpendicular to the direction in which the straight chimney flue extends, and the M regional sampling positions do not overlap on the detection plane, and N is equal to or greater than 2, and M is equal to or greater than 2. According to the invention, the spraying plane and the detection plane are defined to be in a perpendicular direction to the direction in which the chimney flue extends, and N spraying heads are arranged on the spraying plane, and M regional sampling positions are arranged on the detection plane, so that a novel intra-furnace flue gas denitration ammonia spraying intelligent system that is different from conventional flue gas denitration ammonia spraying systems is provided.

Description

technical field [0001] The invention relates to the technical field of atmospheric environmental protection, in particular to an intelligent system for flue gas denitrification and ammonia injection in a furnace and a control method thereof. Background technique [0002] Coal-fired devices, especially coal-fired devices in thermal power plants, exhaust smoke will cause air pollution, one of the main pollutants is nitrogen oxides (NO X ). Nitrogen oxides (NO X ) into the atmosphere will form acid rain, which has a great impact on the environment. Flue gas denitrification is to remove nitrogen oxides (NO X ). [0003] Nitrogen oxides (NO X ) treatment methods are: Selective Catalytic Reduction (SCR) and Selective Non-Catalytic Reduction (SNCR). Among them, SCR uses reducing agent (ammonia, urea) under the action of metal catalyst to selectively react with NO X N 2 and H 2 O. The denitrification principle of SNCR is to spray ammonia water directly at the furnace outle...

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Application Information

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IPC IPC(8): G05D7/06
CPCG05D7/0652
Inventor 王巧英张克西常源远张沈时
Owner 王巧英
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