1. Lianyungang Industrial Profile & Cleaning Needs
Lianyungang is a major port-based industrial city in Jiangsu Province. The Xuwei New District National Petrochemical Base hosts large-scale refining and chemical plants where heat exchangers and condensers face severe CaCO₃ scaling and process-fluid coking. The coastal high-humidity environment accelerates external corrosion. The pharmaceutical cluster — China's largest — requires GMP-compliant reactor and pipeline cleaning without chloride-containing agents. Carbon fiber production involves high-temperature furnace tube decoking, while wind power equipment requires gearbox oil circuit cleaning. The marine climate also promotes rapid microbial growth in circulating cooling water systems, making cooling tower and condenser tube maintenance critical.
2. Common Fouling Types
| Equipment | Fouling Type | Cause |
|---|---|---|
| Petrochemical HX | CaCO₃ scale, coke deposits | High hardness water, high-temp cracking |
| Pharma Reactor | Organic crystallization, polymer scale | Product residue, long cleaning intervals |
| Carbon Fiber Furnace | High-temp carbon deposits | Carbonization process residue |
| Cooling Water System | Biofilm, CaCO₃ scale | Marine climate microbial growth |
3. Technical Solutions
3.1 Petrochemical Equipment
For composite fouling in petrochemical heat exchangers, a Sulfamic Acid (8-10%) + Citric Acid (3-5%) system with BTA+Urotropine inhibitor is circulated at 55-65°C for 4-6 hours. Heavily oil-coked equipment receives alkaline Surfactant pre-treatment (Na₂CO₃+NP-10) before acid descaling. Corrosion rates controlled to ≤4.0 g/(m²·h) for carbon steel and ≤1.0 g/(m²·h) for stainless steel.
3.2 Pharmaceutical GMP Cleaning
Pharmaceutical reactors and process piping are cleaned with Citric Acid (5-8%) as the primary agent (chloride-free formula) with specialized stainless steel inhibitor. Post-cleaning conductivity testing and riboflavin coverage verification are performed. All cleaning records comply with GMP audit traceability requirements.
3.3 HP Water Jetting
Hard external tube bundle scale and carbon fiber furnace deposits are removed with 500-700 bar high-pressure water jetting. Combined with chemical cleaning, descaling rates exceed 95%.
4. Service Coverage & Response
Coverage: Xinpu, Haizhou, Lianyun, Ganyu districts; Donghai, Guanyun, Guannan counties; Xuwei New District, Lianyungang ETDZ, Lianyungang High-Tech Zone.
Commitment: Technical team on-site within 24 hours; proposal and quotation within 48 hours. Emergency response within 12 hours. Chemical agent and HP water jetting equipment stockpile maintained in Xuwei New District for rapid large-scale deployment.
5. Local Case Studies
Case 1 — Petrochemical Heat Exchanger: A U-tube heat exchanger (350 m²) at a Xuwei petrochemical plant experienced a 28°C outlet temperature drop after 2 years. Tube bundles showed 3-5 mm oil-coke composite scale. Alkaline degreasing followed by Sulfamic Acid circulation for 8 hours restored outlet temperature to design value, saving ~350,000 RMB/year in steam costs.
Case 2 — Pharmaceutical Reactor: A 3000L glass-lined reactor at a Lianyungang ETDZ pharmaceutical plant lost 40% jacket cooling efficiency. Citric Acid (6%) + Surfactant cleaning at 50-55°C for 5 hours restored jacket heat transfer to 93% of design with zero glass-lining damage.
6. Why Choose Lanxing Qingxi
- Certified: China Industrial Cleaning Association member with chemical cleaning qualification
- Experienced: 20+ years serving 500+ enterprises
- Customized: Tailored solutions for Lianyungang's petrochemical, pharmaceutical, and new materials sectors
- Responsive: 24-hour on-site, Xuwei stockpile for rapid deployment
- Safe: Pre-cleaning corrosion coupon testing on every project
Lianyungang Equipment Cleaning · Free Consultation
📞 18952832843
Danyang Lanxing Anticorrosion Cleaning Co., Ltd. · CICA Member
No.98 Hongjiadai, Picheng, Danbei, Danyang, Jiangsu · luohuiyong@126.com
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