Protecting Fragile Food Product During Bulk Food Processing Operations
During material discharge, optical sensors ensure a maximum drop height of no more than 5 inches throughout the entire 150º tote rotation.
This automated bulk material handling system provides a total process solution for moving highly fragile food product through multiple process operations into bulk storage for temporary holding prior to final packaging. At a process rate of 12,000 pounds per hour, bulk totes of food product are nested into a lift carriage; the tote is sealed to a custom-designed discharge hood. The tote is vertically conveyed, using 1-1/2 inch, solid 304 stainless steel track and cam rollers, to a 23-foot discharge height. During tilting of the tote, optical sensors ensure a maximum product discharge drop distance of no more than 5 inches throughout the entire 150º rotation. Additional material handling occurs as three stages of vibratory conveyor move the highly fragile food product through two stages of high-speed image processing and sorting to ensure the material maintains its original characteristics throughout processing. The finish-processed food product is then moved into a storage tote using a reverse-tilt fill method to, again, ensure the product drop does not exceed 5 inches during filling. The final take-away conveyor section includes an integrated, NTEP-certified weigh system to ensure the filled tote weight is accurate to +/- .01% of the tote’s 4,000-pound total capacity.
Conveyor and container routing is directed from a single, menu-driven HMI designed and built by NBE. NBE automation expertise integrated the system-wide control, communication, monitoring, and data reporting to the facility’s central control system architecture. NBE integrated automation and performance-proven construction increased material processing rates while reducing material reject rates.
Sanitary Bulk Material Handling Equipment Cleanability: Value, Risk & Outcome
Can a typical, industrial bulk material handling system in a sanitary processing operation be thoroughly cleaned, even to the microbial level? Probably. But, with every cleaning event of a process-inappropriate bulk material handling system comes increased costs for labor, consumables (such as detergents and water), and energy. And, more importantly, with hard-to-clean equipment in sanitary applications comes a greater risk for inspection failure and product contamination. This post, the third in a series (Part 1 and Part 2) regarding sanitary bulk material handling equipment, will address several structural design features to look for in the construction of application-specific, sanitary bulk material handling equipment. To proactively specify these cleanability design features into sanitary bulk material handling equipment will reduce the costs and time of cleaning events, will aid in improving validation and inspection outcomes, and will ensure optimal compliance contribution (OCC).
Continuous weld seams are ground to a No. 4 finish, hand-burnished to eliminate pits, dimples, and crevices.
• Continuous-weld seams, ground smooth to a No. 4 finish: Weld seams, particularly in product contact areas and adjacent areas, must be free of pits, dimples, and crevices that could harbor contaminants such as material residue, microbes, and allergens. In addition to the No. 4 finish, hand-burnished weld seams will improve gross soil removal and resistance to microbial build-up during operation and cleaning.
Non-obstructing raceway contains unbundled utility lines; reduces material build-up, eases cleaning, inspection.
• Unbundled Utility Lines and Hoses: Counter to the typical, industrial machine design philosophy, the utility lines and hoses should be left unbundled. Unbundled utilities will minimize the accumulation of food, dirt, or other organic matter; and therefore reduce the opportunity for growth of microorganisms. Unbundled does not mean uncontrolled. A non-obstructive raceway contains the utility lines and hoses and enables fast and thorough cleaning, promotes material release, eliminates re-cleaning, and aids validation and inspection.
• Laser-cut, Single-plate Sideframe Construction: Typical, industrial machine design often builds substructures using square-tube framework. However, inherent with square-tube construction is the significant number of internal angles, corners, and welded seams that will often block contaminants from cleaning procedures. Laser-cut, single-plate frameworks provides significant cleanability and sanitary operating advantages over square-tube framework. By eliminating the internal angles, corners, and weld seams, laser-cut, single-plate framework reduces cleaning steps, reduces water and detergent use, improves cleanability, and protects product from contamination.
Sure, process-inappropriate equipment can be put into sanitary processing operations, and it may perform its mechanical operations effectively. But, for the sanitary process operation that is driven by external influences such as regulatory compliance, or internal influences such as HACCP programs, application-specific sanitary equipment construction will provide OCC without compromise to the equipment's mechanical operation.
Sanitary Bulk Material Handling Equipment: Materials of Construction In Process-specific Applications
The sanitary-specific construction of this bulk material tote dumper exemplifies OCC design.
In an earlier post, some of the risks of integrating process-inappropriate equipment into sanitary bulk material handling applications were presented. In that post it was noted that many sanitary processing operations settle for force-fit, general industrial equipment rather than process-specific, sanitary bulk material handling equipment. "Clearly, there are degrees, or relative levels to sanitary compliance," says Tom Krueger, CMC, president of Summit Laboratory. "It is critical to recognize how the sanitary-specific construction of process-appropriate, sanitary bulk material handling equipment can translate to improved product safety, and a greater optimal compliance contribution". (OCC)
Materials of construction is referenced in industry guidelines, third-party standards, and in government regulations as an important aspect of sanitary equipment construction. Yet, with such vague references as, 'adequately cleanable', 'appropriate', and 'compatible', it is common for minimally sanitary equipment to be in use despite the negative effects this process inappropriate equipment may have. National Bulk Equipment, Inc. (NBE) has taken a proactive effort to ensure that it's process-specific sanitary bulk material handling equipment provides optimal compliance contribution.
These weld seams, in the product contact area, are continuous and ground to a No. 4 finish.
Regarding materials of construction, NBE uses findings from their pre-production, HACCP assessment to guide the framework and component designs and the selection of the materials of construction. This step puts in priority the protection of personnel and product; reduces cleaning, validation, and inspection times; and enables the highest compatibility with the environmental conditions specific to the process operation. For example, as appropriate, the structural framework, located below the product contact zone can be carbon steel. However, that carbon steel will be sandblasted, fabricated with smooth-ground continuous welds, and then primed and painted with FDA-approved epoxy paint. Materials in product contact and adjacent areas, are constructed of Type 316L stainless steel, also with continuous-weld seams. These stainless steel seams are then ground to a No. 4 finish to eliminate any divots, crevices, or other imperfections in the weld seam where microbial contaminants could accumulate.
In materials of construction, as in every aspect of process-specific sanitary bulk material handling equipment design, specifications beyond the standard are what achieve OCC and the resulting process advantages of: reduced time targets for cleaning, validation, and inspection; minimal labor allocation for cleaning and validation; limiting of consumables (water, chemicals, power) during cleaning; and increased repeatability of positive inspection outcomes.
Bulk Material Handling in Sanitary Applications: Regulatory Influences and Compliance-ready Equipment Design
The signing into law of the Food Safety Modernization Act, on January 4, 2011, enabled the Food and Drug Administration to, "...set in motion sweeping improvements to the security and safety of our nation's food supply." Close on the heels of the FSMA, the FDA, on April 20, 2011, released its 'Strategic Priorities 2011 - 2015' document. One of the strategic priorities presented in the document is to, 'Strengthen Compliance and Enforcement Activities to Support Public Health'. Within the context of this particular strategy the FDA makes clear that it will be, "...implementing a number of new programs designed to sharpen the effectiveness and timeliness of its regulatory, compliance, and enforcement systems." Certainly the complexities of international supply chains, and the quantity and diversity of touchpoints throughout the farm-to-table spectrum call for greater attention and more effective oversight on the part of the FDA and other governing bodies. But, what does this mean for food processing and packaging operations? How can a production facility respond?
Clearly, the best course of action is to be proactive. The FDA, in its strategic documents, is emphatic about taking enforcement action more rapidly, and, "...protecting the public health through criminal prosecution...to deter conduct that violates FDA-enforced laws." One of the first proactive actions in a food processing operation should be a thorough evaluation of any bulk material handling equipment used in a sanitary food processing application; whether in early-stage material input processes, or later-stage operations integrated deeper into the process. Sanitary process operations are no place to settle for force-fit, general-industry bulk material handling equipment. NBE sanitary-application bulk material handling systems eliminate the inspection failures, retrofits, corrective fabrication and finishing, re-programming, and re-inspections resulting when general industry units are force-fit into sanitary processes. Each NBE sanitary bulk material handling system, including: bulk bag fillers, bulk bag unloaders, container dumpers, and bag dump stations is designed and built to be compliance-ready and to conform, from the ground up, to the specific regulated processes and practices of each application. NBE expertise in domestic and international standards across design categories, such as: electrical and mechanical, hydraulics and pneumatics, and safety and controls provide proactive assurance of best-practice sanitary equipment and process design. Just because equipment is built of stainless steel doesn't make it process-compliant. bring clarity and confidence to material handling equipment compliance and process acceptance procedures with the advantages of NBE sanitary-construction material handling equipment and proactive regulatory compliance capabilities.
Bulk Bag Unloader with Integrated Bag Conditioning Reduce Process Cycle Time by 25%
The reduction of total process cycle time continues to be an increasingly significant design requirement of many bulk bag unloader installations. From bulk bag loading and bulk bag conditioning, to material size reduction and downstream material supply; process optimization and operator safety have become top priorities in the design and construction of bulk bag unloaders.
To eliminate the time consuming step of using a free-standing bag conditioner, or the highly dangerous manual methods of conditioning bulk bags by ramming with a forklift or beating with sledgehammers, this bulk bag unloader uses a fully integrated, 4-stage material conditioning sequence to prepare an extremely agglomerated, rock-like material for supply to a downstream liquification process.
A dual-opposing bag hoist, enables high-volume input of material to the first conditioning stage where two, hydraulic de-blocking rams each deliver 28,000 pounds of direct material force. Next, dual, hydraulic massage paddles, each with 2,200 pounds of paddle pressure, further reduce material to chunk sizes. A bag spout valve, with 1,000 pounds of material break-up force, and capable of breaking through a static column of material, then reduces the material for supply to the final stage where a high-capacity, size reduction crumbler breaks material in 1/4-inch pieces for conveying downstream.
So, how does all of this contribute to total process optimization? Take a look at this chart.
An integrated, automated bulk bag conditioning sequence can add a total of four, complete bulk bag unloading cycles to a regular 8-hour production shift. That's a 30% increase in the number bulk bag unloading cycles compared to a free-standing-to-bulk bag unloader system design. Increased efficiency with increased safety.
Fully Automated Bulk Container Dumper Reduces Operator Interaction; Increases Process Throughput
According to findings from a report of the U.S. Department of Labor, Bureau of Labor Statistics; persons in occupations involving manual material handling, such as: repetitive placing, grasping, or moving of objects or materials, are 80% more likely to experience injuries requiring days away from work than persons who complete similar tasks with the aid of machinery.
This fully automated, self-contained, bulk tote dumper system completely manages material from the introduction stage, through discharge and conditioning, to downstream supply of finished material into manufacturing operations. Human interaction is limited to bulk container loading and removal with a fork truck.
The National Bulk Equipment, Inc. lift-and-seal carriage receives each 1,450-pound bulk container and precisely aligns and seals it to the custom, stainless steel discharge hood using an automatic centering system. The 2,000-pound capacity lift carriage raises and rotates the container 180 degrees, ensuring complete material discharge. The 100 cubic-foot capacity, stainless steel receiving hopper with integrated agitator pre-conditions the material. A 9-inch diameter auger feeds pre-conditioned material to a high-capacity, dual-shaft size reduction crumbler for final conditioning of the material prior to pneumatic conveying to downstream process operations. High capacity, chain drive, live roller conveyors and 90-degree rotation turntables provide container indexing and accumulation. Electrogalvanized, zinc-coated, carbon steel conveyor rollers provide superior corrosion resistance and extended duty cycles in the harsh environment.
Complete bulk material process automation engineering and integration, including controls, sensors, monitoring, and data reporting are all centralized to a single, menu-driven touch screen HMI, built by NBE. Legacy upstream and downstream equipment automation integrates with NBE automation to the facility’s SCADA center.
Bulk Bag Filler Provides USDA, 3-A, and BISSC Certified Construction
Bulk bag fillers provide sanitary, safe operation; simplify integration to food, pharma, and medical applications
In previous posts we've discussed the issues associated with accurately identifying and harmonizing the various codes and standard necessary for bulk material handling equipment; particularly in food, pharmaceutical, and medical applications. This post will give an example, in a bulk bag filler application, of the successful harmonization and integration of multiple codes and standards into the physical construction and the controls automation of a bulk bag filler system used in food processing and packaging.
This bulk bag filler, built to achieve USDA, 3-A, FDA and BISSC compliance includes features such as 32 Ra surface finishes to simplify cleaning; tool-less, demountable assemblies to speed inspection; 3-A compliant components to aid in sanitary standards conformance; HEPA air filtration for sanitary bulk bag inflation; and a structural framework leak test system to facilitate clean-in-place (CIP) procedures. Food-grade non-metal components provide excellent material release and resistance to corrosive food ingredients and cleaning chemicals.
Bulk Bag Fillers Process Combustible Dry Powder Material
Here is a unique bulk bag filler application in a process where high volumes of combustible powders are present. Three bulk bag fillers, each being fed by a 1,060 cubic foot capacity storage vessel, process up to 17,000 pounds per hour of the combustible powder. The process area is defined to include Class I, Division 1, Groups C and D; and Class II, Division 1, Groups F and G. The bulk bag fillers are being filled with materials of various characteristics, including flakes and rods. Integrated bulk bag densification ensures a full and stable finished bulk bag, regardless of material type. An integrated, NTEP-certified weigh system bulk bag filler for combustible dust-generating application ensures the bags are filled to a weight of +/- .01% of the total bag weight, up to 4,500 pounds. The bulk bag filler process system manufacturer, National Bulk Equipment, Inc., designed and built the system-wide automation and equipment controls to centralize to a single, menu-driven HMI. The entire process operation communicates directly to the facility's SCADA center.
National Bulk Equipment implemented rigorous risk assessment procedures to ensure the bulk bag fillers would work to prevent operator hazards and improve the physical ergonomics for the operator.