Steel Structure

Efficient wheat milling is essential for producing high-quality flour, and Pingle Group is at the forefront of this technology, providing a range of cutting-edge milling solutions.

The steel structure flour production line consists of a square plansifter, Pneumatic Roller Mill, and other cleaning and milling equipment that are installed in a 3-4 layers steel structure.

Feature: complete process combination, small footprint, short construction period, and low factory cost. It can produce patent flour and grade flour, suitable for medium-sized flour mills.

Capacity range: 60TPD, 100TPD, 120TPD, 140TPD, 150TPD, 160TPD, 200TPD, and 250TPD. This series is highly favored by medium-sized customers. It includes a 3-4 story steel frame structure, with each floor connected by a ladder. The height of the factory does not exceed 14 meters, which can effectively reduce investment and operating costs. It can be used to produce all-purpose flour and patent flour which is suitable for bread, biscuits, instant noodles, and pasta.

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For more information, please visit Pingle Group Wheat Flour Milling Machine.

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Design Considerations for the Construction and Operation of Flour Milling Facilities

20 min reading

Gregory D. Williams President- Facility Engineering Services Kurt A. Rosentrater Assistant Professor - Iowa State University ABSTRACT Flour milling facilities have been the cornerstone of agricultural processing for centuries. Like most agri-industrial production facilities, flour milling facilities have a number of unique design requirements. Design information, to date, has been limited. In an effort to summarize state-of-the-art design procedures for flour milling facilities, an overview of accepted standards and procedures has been assembled and discussed. With this article, engineers should become more familiar with specific design considerations for flour milling production facilities and develop appropriate references to expand their knowledge base. Educators may find this paper useful too. INTRODUCTION Flour milling is as old as human history. Ancient farmers used saddle stones or querns to grind their grain into flour. In the middle ages, gristmills were developed that could grind larger amounts of grain into flour. These original mills were powered by wind, water, animals, or even humans. Historically, each town had its own mill, and the miller would operate for a portion of the finished flour. This was the hub of each community, and remained that way for centuries. The development of the roller mill in the 19th century started the growth of the modern flour mill and the consolidation of the flour milling industry. Over time, consolidation resulted in more technically complex facilities. Today’s flour mill integrates the building facility with the process into a comprehensive, efficient, and highly automated structure. Due to this complexity, engineers must possess an understanding of multiple technical areas to develop and operate functional projects. This article discusses modern flour mill design and construction methods, including planning, life-safety considerations, food compliance regulations, and building design and construction. A. OVERVIEW OF A FLOUR MILLING FACILITY The modern flour milling process was developed in the late 19th century with the advent of the roller mill. Over the decades, improvements have been made to various aspects of the flour milling process, but the major elements have remained largely unchanged since the inception of the roller mill. Others have described the complete details of the flour milling process. The following paragraphs provide an overview of the flour milling process. The flour milling process starts with the receiving and storage of whole grains, stored in groups of steel or concrete silos. The grain then moves through the cleaning system housed in the cleaning tower, employing air currents, magnets, and screens to separate undesirable elements. Equipment used in this stage typically consists of separators, destoners, magnets, aspirators, and other cleaning machinery. After cleaning, the grain is moved to temporary storage silos prior to tempering. Before milling, the wheat is transferred to tempering bins where the moisture content is adjusted to approximately 16%. The milling process comprises the break system, purification, sizing system, reduction system, and tailings system. The mill tower usually consists of 4 to 7 levels with integrated bins at each end. This structure is often made of precast or slip form concrete, although smaller mills may use steel. The break system primarily consists of roller mills, designed to separate the endosperm from the rest of the kernel. The purification system sorts particles based on size, air resistance, and specific gravity. The reduction system utilizes smooth roller mills and sifters to produce finer flour, sometimes requiring up to 11 passes for optimal texture. Finally, in the tailings system, co-products of the milling process are repurposed as animal feed, with fewer tailings for whole grain flour compared to white flour. The finished product bins store the flour before packaging or bulk shipment. Utilities are vital to the operation of a flour mill, with air being a crucial system used to convey flour and separate streams. A significant amount of air is necessary to transport a single volume of flour. B. FACILITY PLANNING Proper planning is pivotal for the long-term profitability of flour milling facilities. Engineers should consider factors such as long-range planning, grain supply, economic factors, regulatory issues, site location, facility expansion versus new construction, technology, and facility layout. C. LIFE SAFETY DESIGN AND REGULATORY DESIGN CONSIDERATIONS Once the layout is established, detailed design can commence. Life safety codes, which provide standards for fire-rated construction and safety elements, are paramount in designing flour milling facilities which produce explosive dusts. D. BUILDING DESIGN CONSIDERATIONS Construction methods can vary between concrete and steel, with larger mills often using concrete techniques. Given the large quantities of storage required, care is taken to ensure sanitation and structural integrity. SUMMARY This article summarizes design procedures relevant to flour milling facilities, emphasizing life safety, layout, planning, and structural considerations. Engineers and educators may find this information valuable, and further inquiries are encouraged.

If you want to learn more, please visit our website Wheat/Maize Pneumatic Roller Mill.

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