DENOx DEVICE CONTROL DEVICE, BOILER EQUIPMENT, DENOx DEVICE CONTROL METHOD, AND DENOx DEVICE CONTROL PROGRAM

By designing a control device including multiple nozzles and a first valve, the nitrogen-reducing agent supply is adjusted using the storage opening mode, the problems of complex equipment configuration and high cost in the prior art are solved, and simple and effective nitrogen-reducing agent supply adjustment is achieved.

JP7664721B2Active Publication Date: 2025-04-18MITSUBISHI HEAVY IND LTD
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Patent Information

Application Number
JP2021043262
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-03-17
Publication Date
2025-04-18
Estimated Expiration
2041-03-17

AI Technical Summary

Technical Problem

When adjusting the supply of nitrogen reducing agents in the nitrogen reducing equipment, the equipment configuration is complex and costly, making it difficult to achieve simple adjustments.

Method used

A control device is designed, including a plurality of nozzles and a first valve, for adjusting the supply of nitrogen reducing agent in the exhaust flow of the boiler facility. The device stores valve opening modes in different operating states and obtains corresponding opening modes according to the current boiler state, adjusts the opening degree of each valve to achieve the appropriate supply of nitrogen reducing agent.

Benefits of technology

The appropriate adjustment of the nitrogen-reducing agent supply in a simple configuration is achieved, reducing equipment complexity and cost, while improving nitrogen-reducing efficiency.

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Abstract

To provide a control device for a denitrification device, a boiler facility, a control method for the denitrification device, and a control program for the denitrification device capable of appropriately adjusting a supply amount of a reductant with a simple configuration.SOLUTION: A control device for a denitrification device is a control device for controlling a denitrification device including a reductant supply unit for supplying a reductant to an exhaust gas passage to which exhaust gas from a boiler is introduced. The reductant supply unit includes a plurality of nozzles and a plurality of first valves for adjusting a supply amount of a reductant to the plurality of nozzles. The control device comprises: a storage unit for storing a plurality of opening degree patterns of the plurality of first valves corresponding to a plurality of operational states of the boiler respectively; an opening degree pattern acquisition unit configured to acquire an opening degree pattern corresponding to a present operational state of the boiler among the plurality of opening degree patterns from the storage unit; and a first valve control unit configured to adjust an opening degree of each of the plurality of first valves, on the basis of the opening degree pattern acquired by the opening degree pattern acquisition unit.SELECTED DRAWING: Figure 5
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Citation Information

Patent Citations

  • Ammonia injector of denitrator

    JP1996103628A

  • Apparatus and method for feeding ammonia in denitrification reactor

    JP1999179155A

  • Flue gas-treating system

    JP2012091081A

  • Exhaust gas denitrification system

    JP2014100630A