Laiwu Steel Sintering Machine Dust Removal Ultra-Low Emission Project – High-Airflow, Low-Pressure Long-Bag Ultra-Low Emission Bag Filter

Laiwu Steel Sintering Machine Dust Removal Ultra-Low Emission Project – High-Airflow, Low-Pressure Long-Bag Ultra-Low Emission Bag Filter

Case study

Haihui Group has successfully secured the contract to construct the sintering machine dust collection system for Shandong Laiwu Steel Yongfeng Iron & Steel Co., Ltd.’s 5 million metric tonne per annum medium-scale steel project. This dust collection system is required to treat multiple complex dust emission points, primarily including: dust generated during the return process of the sintering machine’s main flue; dust from the bed-laying operation at the machine head; dust collection at various process stages in the pelletising workshop; dust emissions from the rotary kiln tail; and dust generated during the operation of the chain grate machine’s dry return belt system. These dust generation points are widely distributed, involve complex operating conditions and high dust concentrations, placing high demands on the technical performance of the dust collection equipment and the system integration capabilities.

To meet increasingly stringent environmental emission standards, Haihui Group’s Baghouse Division, in accordance with the relevant requirements of the ‘Work Plan for the Comprehensive Implementation of Ultra-Low Emission and Energy-Saving Upgrades in Coal-Fired Power Plants’ jointly issued by the Ministry of Environmental Protection, the National Development and Reform Commission, and the National Energy Administration, has organised a team of skilled technical personnel to successfully develop a high-airflow, low-pressure, long-bag ultra-low emission baghouse. This product is a new generation of high-efficiency dust removal equipment designed to meet the upgrade and retrofitting needs of industries such as steel and thermal power generation, and is capable of consistently meeting stringent emission standards of less than 10 mg/Nm³ or even 5 mg/Nm³.

During the R&D process, Haihui’s technical team focused on tackling key technical challenges affecting ultra-low emissions, including the uniformity of airflow distribution, control of filtration velocity through the filter bags, the performance of the pulse-jet cleaning system, and the sealing integrity of the housing, all of which underwent systematic optimisation. Currently, this technology has been successfully applied in numerous ultra-low emission retrofit projects across the steel and thermal power sectors, demonstrating stable and reliable operational performance and receiving unanimous recognition from clients.

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