Ammonia Distillation Column Feed Carbon Steel Pre-Distillation Tower

Product Attributes

This Pre-distillation Column is a large-scale high-pressure pressure vessel (Category A1) engineered for efficient separation and pretreatment of hydrocarbon mixtures in petrochemical and fine chemical processes. Designed to handle demanding operating conditions, it plays a critical role in the initial purification of raw materials, ensuring downstream processes receive feedstocks with consistent quality and composition.

Core Design & Performance Parameters

Design Pressure (Vessel/Coil): 0.4 MPa / -0.1 MPa, enabling the column to operate under both positive pressure and slight vacuum conditions. This dual-pressure capability optimizes separation efficiency by adjusting vapor-liquid equilibrium, ensuring precise removal of light impurities while preserving valuable aromatic components.
Design Temperature (Vessel/Coil): 240°C, ensuring thermal stability when processing high-temperature hydrocarbon streams. The robust thermal rating prevents component degradation and maintains separation performance even with feedstock temperature fluctuations.
Vessel Volume: 58.3 m³, providing ample residence time for effective mass transfer between vapor and liquid phases during distillation. This large volume supports high-throughput operation, making it suitable for large-scale industrial production facilities.
Hydrotest Pressure (Vessel/Coil): 0.56 MPa (vertical test) / 1.02 MPa (horizontal test). These rigorous pressure tests verify the column's structural integrity under extreme conditions, ensuring compliance with global safety standards and resistance to fatigue failure during long-term operation.
Construction Material: Q345R, a high-strength low-alloy steel with excellent weldability and corrosion resistance. This material is specifically selected for prolonged exposure to benzene, toluene, and other aromatic hydrocarbon media, minimizing corrosion-related maintenance and extending equipment lifespan.
Net Weight: 75,000 kg, reflecting its heavy-duty construction to withstand continuous 24/7 operation in harsh industrial environments.
Compliance: Manufactured in accordance with GB/T 150.1-150.4-2014 and NB/T 47041-2024, ensuring adherence to national and industry-specific quality, safety, and performance regulations.
 

Industrial Applications

In petrochemical refineries, this pre-distillation column is a foundational unit for pretreating crude oil-derived naphtha streams. It removes light hydrocarbon impurities (such as methane and ethane) and fractionates initial cuts of benzene, toluene, and xylene (BTX) aromatics. By isolating these valuable components early in the process, it prevents fouling and corrosion in downstream refining units-including reformers, hydrotreaters, and aromatics extraction plants-thereby extending equipment lifespan and reducing unplanned maintenance costs.

Beyond refining, the column is widely deployed in fine chemical production facilities that process aromatic feedstocks. Here, its precise pre-distillation capability is essential to isolate high-purity benzene and toluene, which serve as critical raw materials for manufacturing plastics, synthetic fibers, pharmaceutical intermediates, and specialty solvents. Its ability to operate under slight vacuum conditions also makes it suitable for sensitive separation processes where thermal degradation of components must be minimized, such as in the recovery of valuable solvents from industrial waste streams.

Performance Advantages

The column's large volume and high-pressure rating ensure high throughput and efficient separation, even with complex feed compositions. Its Q345R construction delivers exceptional durability, while compliance with rigorous design standards guarantees safe and reliable operation in continuous production environments. By delivering consistent, high-quality feedstocks to subsequent processing stages, this pre-distillation column enhances overall plant efficiency, reduces energy consumption, and supports the production of high-value chemical products that are foundational to modern industrial supply chains.

Main Material

Stainless Steel 、carbon steel 、Nickel and nickel-based alloys 、Titanium & titanium alloys 、Copper & copper alloys 、Zirconium & zirconium alloys, etc...

Production Capacity

Features

High-Quality Construction: Fabricated from the finest premium-grade materials, this vessel is engineered to endure extreme operational conditions while preserving its structural integrity, offering reliability and longevity in even the toughest environments.
Precision Engineering: Expertly designed to manage both positive and negative pressure scenarios, making it the perfect choice for a diverse array of industrial applications, ensuring versatile and adaptable usage.
Rigorous Testing: 100% X-ray testing to ensure our products meet international standards, delivering leak-free performance and offering quality assurance.
Strong adaptability: Engineered to be applicable to a diverse range of materials and working conditions, showcasing versatility and efficiency across various operational environments.

Supply Ability & Additional Information

Supply Ability: 15-90 days 

Certificate: ISO, ASME, GOST, others 

Production Capacity：500 Pieces/Year 

Transportation: Ocean,Rail transport,Land,Others 

Payment Type: T/T, L/C, D/P，Bank Guarantee，Others 

Incoterm:  FOB, FCA, CFR, CIF, FAS, DDP, DAP, Others 

Specification：Customized on Request 

We'll help you configure a system that meets all of your research needs.

Packaging & Delivery

Selling Units: Set/Sets 

Package Type: asked by buyer 

Shipping Preparation: Pickling and passivation for stainless steel parts 

Departure: No.9 Yangtes south Road ( No.1 Bonded Zone ), Yangzhou City, Jiangsu Province, China.