CNOOC Tianye Chemical Desulfurization EPC Project
High-Efficiency Desulfurization Packing Solutions Help Petrochemical Enterprises Achieve Ultra-Low Emission Standards
Project Overview
CNOOC Tianye Chemical Co., Ltd. is located in the Jinqiao Economic Development Zone, Hohhot City, Inner Mongolia Autonomous Region. In response to the national ultra-low emission policy, the company implemented a high boiler flue gas index upgrade project. The project adopts ammonia/ammonium sulfate wet desulfurization technology, with CNOOC Energy Conservation and Environmental Protection Service Co., Ltd. as the engineering, procurement, and construction (EPC) contractor.
The project aims to control the concentration of sulfur dioxide, nitrogen oxides, and particulate matter in the flue gas below 35mg/Nm³, 50mg/Nm³, and 5mg/Nm³ respectively, achieving ultra-clean emissions and meeting the most stringent national environmental requirements.
Project Location
Jinqiao Economic Development Zone, Hohhot, Inner Mongolia
Process Technology
Ammonia/Ammonium Sulfate Wet Desulfurization
Project Objectives
SO₂ ≤ 35mg/Nm³, NOx ≤ 50mg/Nm³, Particulates ≤ 5mg/Nm³
AYRTTER Technical Solution and Packing Application
The project adopts a “one boiler, one tower” scheme. The core equipment includes an absorption tower, spray system, and mist eliminator. The absorption tower has a diameter of 13 meters and is equipped with multiple spray layers and packing layers to ensure sufficient gas-liquid contact and achieve high-efficiency desulfurization. Packing is a key internal component in wet desulfurization towers for efficient mass transfer.
Packing Selection and Configuration Scheme
Lower Tower Section – Random Packing
Upper Tower Section – Structured Packing
Packing Material Selection
Considering the corrosiveness of the desulfurization slurry (containing ammonium salts, sulfites, etc.), the project mainly selects corrosion-resistant engineering plastic materials for packing, ensuring long-term stable operation in the temperature and chemical environment of the desulfurization system, avoiding corrosion issues associated with metal packing.
Reinforced Polypropylene (RPP)
Polyvinylidene Fluoride (PVDF)
Project Results
After successful commissioning, the project significantly reduced pollutant emissions and met stringent environmental standards. Although corrosion of internal tower components occurred during initial operation, subsequent rectifications ensured long-term stable operation of the plant. As an important environmental upgrade case within the CNOOC system, this project provides reliable technical options and engineering practice references for similar petrochemical and chemical enterprises in flue gas treatment.
Project Summary
The success of the CNOOC Tianye Chemical desulfurization EPC project is attributed to rational process design (ammonia-based desulfurization) and optimized selection of key internal components (such as the combination of staircase ring/Pall ring and structured packing). This packing configuration balances high desulfurization efficiency with anti-clogging reliability, making it one of the core elements ensuring long-term, efficient, and stable operation of wet desulfurization plants.
