Boiler — Process Challenge

Kesselwasser-Skalierungsverhinderung: Antiscalants und Dispergiermittel

Resthärte im Speisewasser lagert CaCO₃/CaSO₄ und Kieselsäure auf Kesselrohren ab, isoliert diese und birgt Überhitzungsrisiken. Die Auslegung verwendet ein Phosphonat plus ein Polymer-Dispergiermittel und Chelatbildner, um Härte als lösliche Komplexe zu sequestrieren
Updated Jun 2026
Lösungsansatz

RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.

Typical Treatment Workflow
1
Water & System Assessment
Characterize the water and the system — hardness, alkalinity, pH, TDS/conductivity, microbial load, and the metallurgy and temperatures of the equipment being protected.
2
Program & Chemistry Selection
Match coagulants, flocculants, scale and corrosion inhibitors, biocides, or pH adjusters to the water profile and discharge limits, factoring compatibility with any existing program.
3
Jar Testing & Dosing
Confirm coagulant and flocculant dose and feed point by jar test, set inhibitor and biocide treat rates, and size packaging (drums, totes, bulk) to consumption.
4
Monitoring & Control
Track residuals, turbidity, ORP, corrosion coupons, and effluent compliance, adjusting chemistry and dose as feedwater and load change.
Recommended Chemistries (5)
Hydroxyethylidene Diphosphonic Acid
CAS 2809-21-4
Phosphorsäureester & Derivate
Primärer Ablagerungsinhibitor für CaCO3
HEDP threshold-inhibits CaCO3/CaSO4 and is thermally stable enough for low/medium-pressure boiler service, keeping hardness from nucleating on tubes
Schmelzpunkt:198-199   Siedepunkt:578.8   Solubility: 1.15e+01 g/L
Schnellansicht
Alle Details
Polyacrylic Acid Sodium (PAAS)
CAS 9003-04-7
Polymere & Harze
Konditionierung
Polyacrylate disperses precipitated hardness and iron oxide as a mobile sludge that leaves with blowdown rather than baking onto the tube
Schnellansicht
Alle Details
Sodium Polyaspartate (PASP)
CAS 55719-33-0
Säuren & Salze
pH-Einstellung
Biodegradable polyaspartate inhibits and disperses CaCO3/CaSO4/silica scale; a greener dispersant option. (Spine tags pH Adjustment; chemistry is scale inhibition.)
Schnellansicht
Alle Details
Ethylenediaminetetraacetic Acid
CAS 60-00-4
Amine & Amide
Breitband-Chelatbildner
EDTA forms soluble 1:1 chelates with Ca2+/Mg2+/Fe, dissolving residual hardness so it cannot precipitate on heat-transfer surfaces
Schmelzpunkt:237 °C   Dichte:0.86 at 20 °C   Solubility: 1000000 mg/L at 25 °C
Schnellansicht
Alle Details
DTPA (Diethylenetriaminepentaacetic Acid)
CAS 67-43-6
Amine & Amide
High-performance chelant for iron
Higher-denticity chelant holds iron and hardness through higher temperatures than EDTA, backstopping the program at elevated boiler pressure
Physical Description: White to off-white solid   Siedepunkt:Decomposes   Schmelzpunkt:219-220 ºC
Schnellansicht
Alle Details

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