Heating Function

SCR systems require urea solution typically 32.5% concentration for injection into flue gas or exhaust streams reducing NOx emissions. Preparation involves dissolving solid urea crystals in heated water or diluting concentrated urea with warm water. The exchanger heats makeup water to 40-60°C accelerating dissolution, preventing crystallization, and ensuring homogeneous solution for reliable NOx reduction performance.

Design Configuration

Shell-and-tube or plate heat exchangers with cold water on one side and heating medium on opposite side. Compact design suits skid-mounted urea preparation systems. ERGIL engineers exchangers based on water flow rate, temperature rise requirements, and available heating utilities with typical duties 0.1-2 MMBTU/hr for systems serving gas turbines, diesel engines, or industrial boilers.

Heating Methods

Low-pressure steam provides clean efficient heating where plant steam available. Hot water circuits using engine jacket cooling or waste heat recovery. Electric immersion heaters for small systems or where utilities limited. ERGIL selects heating based on facility infrastructure and SCR system size ensuring reliable water temperature control.

Material Selection

Stainless steel 316 construction resists corrosion from water and trace urea. Design prevents material incompatibility with urea solution chemistry. Operating temperatures and pressures modest typically 15-50 psig. Construction per applicable standards ensuring food-grade or industrial water quality maintenance.

Applications

Gas turbine SCR systems for power generation and mechanical drive, diesel engine exhaust treatment in marine and stationary applications, industrial boiler NOx control, cement kiln emissions reduction, and any SCR installation requiring urea solution preparation. Serves systems consuming 5-500 gallons per day urea solution.

Control Integration

Temperature control maintains optimal water heating for dissolution efficiency. Integration with urea dosing systems ensures adequate reagent preparation. Level and concentration monitoring in preparation tanks verify solution quality. Automated operation minimizes manual intervention in SCR reagent supply.

Performance Benefits

Proper water temperature ensures complete urea dissolution preventing crystallization and SCR injector plugging. Reliable reagent preparation maintains consistent NOx reduction performance. Simple proven technology with minimal maintenance. Compact design integrates easily with urea preparation skids.

Construction Standards

Design per appropriate heat exchanger codes with materials suitable for water and urea service. Pressure and temperature ratings match system requirements. Hygienic design where food-grade urea used. Complete documentation with thermal calculations and material certifications.

ERGIL urea solution prep water exchangers deliver dependable heating ensuring effective reagent preparation for reliable SCR system NOx emissions control performance.