Chemical Dosing Systems System & Equipment Wholesale - QILEE

Product Overview

- QILEE Chemical Dosing Systems are automated, wholesale-ready water/boiler chemical dosing solutions designed for precise, continuous treatment of feedwater and boiler systems. The modular system integrates agent storage, precision dosing pumps, online sensors and a PLC-based control/feedback loop to support multi-agent dosing (oxygen scavengers, scale inhibitors, pH regulators, phosphates) and is configurable for boiler capacities from 0.5 t/h up to 1000 t/h and pressures from 0.1 MPa to 35 MPa.

Product Features

- Closed-loop “detection → control → dosing → feedback” operation with PLC, PID algorithms and touchscreen HMI.

- Frequency-conversion diaphragm dosing pumps with ±0.5% dosing accuracy and pulsation damping for stable flow.

- High-precision online instruments (DO, pH, conductivity, flow) with auto-calibration/cleaning.

- Corrosion-resistant construction for tanks, pipelines and pump heads; multi-agent (1–4 independent units) dosing capability.

- Fully automatic 24/7 operation with manual/automatic switching, alarms, safety interlocks and comprehensive maintenance support.

Product Value

- Protects boiler heating surfaces and plant equipment by preventing scaling, oxygen corrosion and hydrogen damage, improving heat transfer and steam quality.

- Reduces chemical consumption (typically 10–15% versus manual dosing) and labor intensity (over 90% reduction).

- Lowers maintenance and downtime costs, extends system life, and helps meet operating and safety targets for high-pressure/high-temperature boilers.

- Provides reliable data-driven control for consistent water quality and easier regulatory/compliance reporting.

Product Advantages

- High precision and stability (±0.5% dosing accuracy) driven by frequency-conversion pumps and closed-loop control.

- Robust, corrosion-resistant design with an expected whole-machine service life ≥ 8 years.

- Strong after-sales infrastructure: 24-hour technical support, local spare-parts distribution (Asia/Europe/North America), on-site service (48 h domestic / 72 h overseas), and operator training.

- Customizable to a wide range of boiler capacities and pressures; thorough safety protections (liquid level alarms, overload protection, emergency stop).

- Backed by QILEE’s advanced production techniques, strict QC and modern management systems.

Application Scenarios

- Power station boilers: medium, subcritical, supercritical and ultra-supercritical units (high temp/pressure up to ~600°C/35 MPa) requiring coordinated phosphate programs and precise oxygen scavenging to prevent hydrogen damage and scaling.

- Industrial steam boilers: chemical, textile, food, pharmaceutical, metallurgy and similar industries (steam outputs ~0.5–100 t/h) needing scale inhibition and oxygen control to protect product quality.

- Hot water boilers: central heating, industrial heating and domestic hot water systems focused on pH control and corrosion inhibition across heating networks.

- Typical dosing roles include oxygen scavengers (sodium sulfite, hydrazine, DEHA), scale inhibitors (phosphonates, polycarboxylates, silicates), pH regulators (NaOH, ammonia, trisodium phosphate) and phosphate treatments (trisodium/disodium sodium dihydrogen phosphate) depending on boiler type and pressure.