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The QDPP Integrated Sewage Treatment Equipment is named after its raw materials and is made from a new high-molecular material.
Due to the fact that the equipment is formed using molds into a single piece, it presents as a tank.
The Zhong Qiao Enlightenment R&D team has overcome challenges with this tank design, drawing on and improving Western technologies.
In response to the sewage conditions and discharge standards in rural China, they have developed a series of integrated sewage treatment equipment including: Zhong Qiao Tank Horizontal Tank A/B, Zhong Qiao Tank Vertical Tank A/B, and Zhong Qiao Tank Hollow Tank.
The raw material used is high-modulus polypropylene, which is an ideal choice for buried drainage, sewage, and wastewater treatment due to its properties.
This material has an elastic modulus of ≥1500 MPa, while HDPE has an elastic modulus of only 800 MPa. The elastic modulus is crucial for determining the product's ring stiffness; higher elastic modulus results in higher ring stiffness.
Polypropylene is a non-toxic, odorless, tasteless, white, highly crystalline polymer with a density of only (0.90-0.91 g/cm³), making it one of the lighter plastics.
It is very stable in water, with an absorption rate of only 0.01%, a molecular weight of approximately 80,000 to 150,000, excellent molding properties, and a glossy surface.
Polypropylene has excellent chemical stability. It is resistant to various chemical reagents but can be eroded by concentrated sulfuric acid and concentrated nitric acid. However, it can soften and swell when exposed to low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons, and chlorinated hydrocarbons.
The chemical stability of polypropylene improves with increased crystallinity, making it suitable for manufacturing various chemical equipment and components with good corrosion resistance.
| Polypropylene (PPH) Performance Table | |||
| Item | Typical Value | Unit | Test Method |
| Density | 905 | k/m3 | ISO 1183 |
| Melt Flow Rate (230°C/2.16 kg) | 0.3 | g/10 min | ISO1133 |
| Melt Flow Rate (190ºC/5.0kg) | 0.6 | g/10 min | ISO 1133 |
| Yield Stress (50 mm/min) | 36 | MPa | ISO 527-2 |
| Yield Strain (50 mm/min) | 10 | % | ISO 527-2 |
| Tensile Modulus (1 mm/min) | 1650 | MPa | ISO 527-2 |
| Charpy Impact Strength, Notched (+23°C) | 7 | KJ/m² | ISO 179/1eA |
| Notched Impact Strength (-20°C) | 2 | KJ/m² | ISO 179/1eA |
| Vicat Softening Temperature B (50N) | 95 | ºC | ISO 306 |
The company has strong technical and production capabilities, as well as a team of dedicated water treatment professionals.
It holds a Class II qualification for professional contracting of environmental protection engineering, a safety production license, more than 50 utility model patents, 13 invention patents, and 1 international invention patent, 27 software copyrights, and has passed the CEP certification of the China Environmental Protection Association and the three-system certification.
The company has been awarded multiple titles and honors such as "Specialized and New", "Invisible Champion of Weifang City", "Enterprise Technology Center", "Famous Brand of Shandong Province", "One Enterprise One Technology R&D Center", "Weifang Industrial Design Center", and "Weifang Key Laboratory".
It has experienced process design and industrial design teams, a high-level and high-quality production team, professional service personnel, and a meticulous, efficient, and responsive after-sales team.
Founded in 2013, Shandong Zhong Qiao Enlightenment Environmental Protection Equipment Co., Ltd. is a high-tech enterprise that integrates technology research and development, project design, equipment manufacturing, engineering installation, commissioning, operation, and technical consulting services.
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