Chemical Industry Effluent Challenges & Pump/Valve Selection Approaches

This paper addresses three core pain points in wastewater treatment for the chemical industry, analyzing the technical compatibility of Anhui Changyu Pump & Valve's flagship products.

1. Three Core Challenges in Chemical Effluent Treatment‌

‌1.1 Media Complexity‌

Chemical wastewater often contains strong acids, alkalis, organic solvents, and solid particles, leading to corrosion, crystallization, and clogging in conventional pumps. For example, one chemical plant experienced pump casing perforation due to chloride-induced corrosion, resulting in monthly maintenance costs exceeding ‌100,000 RMB‌.

1.2 Harsh Operating Conditions‌

High temperatures (up to ‌150°C‌) and high pressures (some process sections require ‌≥2.5MPa‌) demand superior sealing performance and structural integrity. Industry reports (2024) indicate that ‌23% of unplanned shutdowns‌ are caused by pump/valve failures.

1.3 Environmental Compliance Pressure‌

The updated ‌GB31571-2025 Petroleum & Chemical Industry Emission Standards‌ mandate a leakage rate below ‌0.1%‌, making traditional packed-seal pumps increasingly non-compliant.

2. Scenario-Based Selection Strategies‌

2.1 Highly Corrosive Media (e.g., Hydrofluoric Acid, Mixed Acids)‌

‌Recommended Model:‌ ‌CYQ Fluoroplastic Magnetic Drive Pump‌

‌Key Features:‌

Full perfluoroelastomr (FFKM) seals + silicon carbide (SiC) bearings

Compatible with ‌pH 0–14‌

‌Case Study:‌ Achieved ‌8,000+ hours‌ of continuous operation in lithium battery waste acid treatment with zero corrosion.

2.‌2  High-Solid Content Wastewater (e.g., Catalyst Particles, Sludge)‌

‌Cost-Effective Option:‌ ‌FYH Fluoroplastic Submersible Pump‌ (≤20% solids)

‌Unique Advantage:‌

Open-type triple-channel impeller design improves particle passage by ‌40%‌ vs. standard pumps.

‌Application Example:‌ Used in a ‌titanium dioxide plant‌ (Anhui) for titanium slag wastewater (particle size ≤8mm).
‌High-Pressure Alternative:‌ ‌CYF Fluoroplastic Centrifugal Pump‌ (requires pre-filtration).

2.3 High-Temperature/Pressure Conditions (e.g., Distillation Tower Effluent)‌

‌High-Temp CYQ Model:‌

Equipped with ‌samarium-cobalt (SmCo) magnets‌, maintaining ‌>92% magnetic drive efficiency at 150°C‌.

‌Alternative:‌ ‌CYC Stainless Steel Magnetic Pump‌ (requires cooling below ‌120°C‌).

2.4 Environmentally Sensitive Zones‌

‌Mandatory Choice:‌ ‌CYQ/CYC Magnetic Pump Series‌

‌Certified Leakage Rate:‌ ‌<0.01%‌, compliant with ‌EU TA-Luft Standards‌.

‌Case Implementation:‌ Adopted plant-wide in a ‌Shanghai fine chemical park‌ as a replacement for traditional pumps.

3. Selection Pitfall Avoidance Guide‌

‌3.1 Common Mistakes to Avoid‌

‌Stainless Steel Pumps (CYC/FY Series):‌
Not suitable for media containing ‌>50ppm chloride ions‌ (prone to stress corrosion cracking).

‌CYF Centrifugal Pumps:‌
Dry running must be avoided (fluoroplastic material has poor heat conductivity and may deform).

‌3.2 Efficiency-Enhancing Configurations‌

‌For Crystallizing Media:‌
Install ‌flushing ports‌ on ‌CYQ pumps‌.

‌For Fluctuating Flow Rates:‌
Equip ‌FYH pumps‌ with ‌variable frequency control systems‌ (energy savings ≥30%).

This selection system can cover ‌over 95% of chemical industry wastewater scenarios‌. Final confirmation should be based on ‌specific media composition reports‌ (must include ‌Cl⁻, F⁻, and solid content‌ data).

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