Water treatment plant for fertilizers production company

Type

Water treatment plant for

Task

The water treatment plant modernization

Water source

Surface (river) water

About the project

Part of the river water is directed directly to the mechanical filters and filtered water is supplied as make-up water for the cooling system.

Another part of river water is treated by clarifiers dosing lime combined with coagulation. The clarified water is filtered in mechanical filters. Filtered water demineralized by The Ion Exchange Packed-Bed filters.

Ammonia and iron are removed from the process condensate by cation resin filters. Demineralized water and treated process condensate deionizing by MixedBed filters.

Plant Capacity

Deionized water 430 m3/h

Demineralized water 200 m3/h

Filtered water 130 m3/h

River water

Parameter Unit Value Parameter Unit Value
Total Hardness meq/kg 4 ÷ 4,7 Mg2+ mg/kg 15 ÷ 20
Alkalinity meq/kg 3 ÷ 3,8 Phosphates mg/kg P2O5 0,15 ÷ 0,18
BOD mg/kg O2 8 ÷ 9 Silicates mg/kg SiO2 5 ÷ 9
NH4+ + NH3 mg/kg N 0,2 ÷ 0,5 Salinity mg/kg 220 ÷ 280
NO2 + NO3 mg/kg 2 ÷ 3 Suspended Solids mg/kg 6 ÷ 12
Cl- mg/kg 10 ÷ 16 pH 6,5 ÷ 7,5
SO42- mg/kg 25 ÷ 35 Conductivity mS/cm 400 ÷ 480
Fe3+ mg/kg 0,3 ÷ 0,5 Temperature °C 4 ÷ 20
Ca2+ mg/kg 25 ÷ 50 Flow rate m3/h 800

Steam condensate

Parameter NH3 Fe3+ Cu2+ Silicates Conductivity Temperature Flow rate
Unit mg/kg N mg/kg mg/kg mg/kg SiO2 mS/cm °C t/h
Value ≤0,500 ≤0,050 ≤0,020 ≤0,030 ≤ 2 <50÷60 <220

Process condensate

Parameter NH3 CO2 Organics Temperature Pressure Flow rate
Unit mg/kg N mg/kg mg/kg CH3OH °C bar m3/h
Value ≤10 ≤15 ≤30 40÷50 3,7 120

Effluent water parameters

Parameter Unit Demineralized water Deionized water
Silicates (SiO2) mg/kg <40 £ 20
Fe mg/kg < 50 £ 30
Cu mg/kg < 20 £ 20
NO2 + NO3 mg/kg <20 £ 20
pH < 8,5 6,5÷7,5
Conductivity mS/cm <2 £0,5
Flowrate t/h 200 430

Summarize

The modernization of the existing clarifiers was provided in this project. It became possible to achieve suspended solids concentration of up to 2mg/l in the clarified water. Because of this working cycle and service life of mechanical and Ion Exchange filters will be extended. Reduced service water and reagents consumption allow our customer to save money.

Modernizing the water treatment plant our engineers make a decision to replace classic Ion Exchange filters with the Ion Exchange Packed-Bed technology. This technology makes it possible to achieve better water demineralization results, reduce the amount of water and reagents consumed for filter regeneration.

Close