Online dynamic adjustable rectification system for denitration speed field and method

Abstract

The invention discloses an online dynamic adjustable rectification system for a denitration speed field and a method, the online dynamic adjustable rectification system comprises an inlet flue, a vertical flue and an SCR reactor which are sequentially connected, an ammonia spray grille is arranged in the vertical flue, the SCR reactor is internally provided with a catalyst layer, the bottom of thevertical flue is connected to the inlet flue, a first corner fixed guide plate is arranged at the joint position of the vertical flue and the inlet flue, the top of the vertical flue is connected with the inlet of the SCR reactor, and a second corner fixed guide plate is arranged at the joint position of the top of the vertical flue and the inlet of the SCR reactor. The online dynamic adjustablerectification system is characterized in that: a fixed guide plate and a movable guide plate are arranged in the SCR reactor, and are located on the top of the flue corresponding to the catalyst layerof the SCR reactor, a flow equalizer is arranged above the catalyst layer, a plurality of partitions are evenly divided between the flow equalizer and the catalyst layer, a multi-point partition dynamic pressure measuring device is arranged in each partition, and the multi-point partition dynamic pressure measuring device is connected to the movable guide plate through a control module. The online dynamic adjustable rectification system solves the problem that the inlet flow field of the catalyst layer of the existing flue gas denitration system is not uniform.

Description

technical field [0001] The invention relates to an online dynamic adjustable flow system and method for a denitrification velocity field, belonging to the field of SCR denitrification systems for coal-fired boilers. Background technique [0002] The problem of air pollution caused by nitrogen oxides produced by coal-fired power plants is becoming more and more serious. The latest standard for ultra-clean emission of NOx from coal-fired power stations requires less than 50mg / Nm3. Controlling NOx emissions has become an important part of the current development of the power industry. In order to meet the increasingly stringent nitrogen emission standards, selective catalytic reduction (SCR) flue gas denitrification technology has become the main choice for flue gas denitrification of large coal-fired units. The denitrification efficiency and ammonia slip rate are two major indicators to measure the performance of the SCR denitrification system. On the premise that the design o...

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Problems solved by technology

[0008] Purpose of the invention: The purpose of the present invention is to address the deficiencies in the prior art, to provide an online dynamic adjustable flow system and method for the denitrification velocity field, which can solve the problem of uneven flow field at the inlet of the catalyst layer in the existing flue gas denitrification system, and has a flow A denitrification velocity field online dynamic adjustable flow system with the advantages of more sensitive and accurate field adjustment

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