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DeNOx System for reduction of nitrogen oxides

Equipment Description and Technical Data

All technical parameters see in the passport enclosed.

The general principle of the Selective Non-Catalytic Reduction (SNCR) system, used as a secondary measure to reduce nitrogen oxide (NOx) concentrations in flue gas, involves injecting an ammonia water solution (reagent) into the boiler combustion chamber. This process relies on specific chemical reactions that occur at a designated point in the combustion plant under predefined temperature conditions.

SNCR Plant Overview
The SNCR system is divided into two main sections:

Common Section – Shared by boilers K8, K9, K10, and potentially K14.

Boiler-Specific Section – Installed individually on each boiler (K8, K9, K10, and possibly K14).

Common Section Components
Reagent Dispensing Equipment

Bottling station with a catch pit

Storage tanks with sump

Pumps for reagent transport and circulation

Underground emergency sump

Compressor Station

Compressors

Air dryers

Aerators and filters

Condensate oil separators

Electronic condensate traps

Demineralized Water Pumping Station

Piping Systems for:

Reagent

Pressure and control air

Demineralized water

Instrument air

Boiler-Specific Section Components
Each boiler (K8, K9, K10, and potentially K14) includes:

Mixing and Measuring Module

Injection Lance with Two-Component Nozzles

Piping for:
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Reagent

Demineralized water

Pressure and control air

Control valves

PLC Control System

Continuous Temperature Measurement (AGAM or pyrometers, depending on boiler)

Continuous NOx Measurement (N43 SIIp)

Key Notes
Purpose: NOx reduction via chemical reaction with ammonia solution.

Flexibility: System designed to optionally include boiler K14.

Automation: PLC-controlled with real-time monitoring (temperature and NOx levels)