A high-efficiency gas-liquid mixing device

By using a high-efficiency gas-liquid mixing device and an intelligent ammonia injection control system, the problem of mismatch between the ammonia concentration field and the NOx concentration field in the traditional ammonia distribution method is solved. This achieves anti-clogging of the ammonia gun nozzle and accurate control of NOx, ensuring stable system operation and NOx uniformity, and reducing the amount of denitrification agent used.

CN224442654UActive Publication Date: 2026-07-03NINGXIA BAOFENG ENERGY GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NINGXIA BAOFENG ENERGY GROUP CO LTD
Filing Date
2025-02-26
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Traditional ammonia distribution methods assume that flue gas flow and NOx distribution are fixed and cannot match the NH3 concentration field and NOx concentration field. This leads to local over-injection of ammonia and increased ammonia escape, causing ash accumulation and blockage of the denitrification catalyst and the cold end of the downstream air preheater, affecting the normal operation of the unit. At the same time, there may be local under-injection of ammonia, resulting in high NOx at the SCR outlet and poor NOx concentration uniformity.

Method used

The system employs a high-efficiency gas-liquid mixing device, equipped with an intelligent ammonia injection control system. Through zoned equalization adjustment technology, combined with quick-connect interfaces and flange assistance, it resolves ammonia nozzle clogging and accurately controls NOx at the denitrification outlet. Auxiliary components such as swivel rings and rubber strips are used to assist in installation, ensuring stable operation of the unit.

Benefits of technology

It significantly reduces the amount of denitrification agent used, prevents ammonia gun clogging, achieves uniform ammonia injection, ensures stable system operation, reduces ammonia escape, guarantees uniform NOx concentration, and prevents ash accumulation and clogging of the denitrification catalyst.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of high-efficiency gas-liquid mixing devices, comprising: main component: the main component includes gas-liquid mixer and air inlet;The air inlet is fixedly connected to the bottom of gas-liquid mixer;Use component: the use component includes quick connector and flange;The quick connector is installed in the rear end both sides of gas-liquid mixer, and flange is fixedly connected to the outside of one end of gas-liquid mixer.To solve the traditional ammonia distribution mode is assumed that flue gas flow and NOx distribution is fixedly unchanged, and in fact, when boiler load or combustion mode is adjusted, traditional ammonia injection mode cannot make NH3 concentration field and NOx concentration field match, resulting in local excessive ammonia injection, ammonia escape increases, cause denitration catalyst and downstream air preheater cold end ash, the probability of plugging increases, affect normal operation of unit, local ammonia injection deficiency may also occur simultaneously, cause SCR export NOx is high, the problem of poor NOx concentration uniformity.
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