Method and apparatus for rust prevention in gravity chutes using rust prevention agent in wash cycle completion stages
Sodium Nitrite application during wash cycles forms a protective barrier in gravity chutes, addressing rust-related issues and ensuring cleanliness and compliance.
Patent Information
- Application Number
- PCT/US2024/014700
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-07
- Publication Date
- 2025-08-14
AI Technical Summary
Gravity chutes with polished stainless steel linings are susceptible to rust formation due to exposure to water and cleaning agents, leading to corrosion, contamination, operational inefficiencies, and non-compliance with regulatory standards.
Applying a Sodium Nitrite solution during the wash cycle completion stages to form a protective barrier on the chute's surface, ensuring uniform coating and periodic maintenance to prevent rust.
Ensures the longevity, cleanliness, and environmental safety of gravity chutes by preventing rust, enhancing operational efficiency and compliance with regulatory standards.
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Figure US2024014700_14082025_PF_FP_ABST
Abstract
Description
Method and Apparatus for Rust Prevention in Gravity Chutes Using Rust Prevention Agent in Wash Cycle Completion StagesBrief Description of Drawings
[0001] Figure 1 shows additive container adding agent to tank with motor
[0002] Figure 2 shows gravity chute wash hardware connected to cleaning equipment
[0003] Figure 3 shows a floor module controller controlling a water solenoid valve and sprayer.Detailed Description of Drawings
[0004] Figure 1 shows a bottle of concentrate anti-rust agent (11) being poured into a dispersal tank (20) which acts as a slurry holding tank which is pumped out into a main waterline (not shown) by a positive displacement metering pump (17).
[0005] Figure 2 shows a dispersal tank (20) connected to a positive displacement metering pump (17) which is controlled by an electronic wash controller (25A) which turns power on to control connection (17A) to said positive displacement metering pump (17) which flows the Sodium Nitrite solution to a nipple intake (45) on a manifold (42) mixing with the water flow out (51B). The electronic Wash controller (25A) controls the water intake (51A) via solenoid valve (33) by turning on power to the solenoid coil (31) where water begins to flow through said solenoid valve (33) to a flow meter (48) which measures the flow output sending flow sensor data feedback (48A) to the wash controller (25) which in turn controls the water flow (51A) with the metered anti-rust agent (11 Figure 1) residing in the slurry tank (20) creating a controlled dispensary of proper solution concentrations optimized for rust prevention coatings.
[0006] Figure 3 is a floor module control board (25B) which receives sufficient data signals(27B) from the wash controller (25A Figure 2) which signals the floor controller (25B) to turn on the solenoid coil (31) allowing the mixture of water and anti-rust agents (11 Figure 1) to flow through the solenoid (33) via the water intake port (51C) which flows through the nozzle (65) under high pressure through the sprayer (65) thus controlling the coating of the inside lining of the gravity chute to prevent rust from forming.Summary of the Invention
[0007] The present invention addresses the critical need for rust prevention in gravity chutes, particularly those equipped with polished stainless steel inner linings. By introducing a rust prevention agent, specifically Sodium Nitrite, into the wash cycle completion stages, this invention offers an innovative method and apparatus to ensure the longevity, cleanliness, and environmental safety of gravity chutes.
[0008] Corrosion Prevention for General Waste Chutes:
[0009] In industries involvingfood processing and handling, gravity chutes play a vital role in material transport. Stainless steel chutes are preferred for their cleanliness and resistance to contamination. However, without adequate rust prevention measures, these chutes are susceptible to corrosion due to exposure to water and cleaning agents. The invention ensures that these chutes remain rust-free, preventing contamination risks.
[0010] Industrial and Manufacturing Applications:
[0011] In manufacturing and industrial facilities, gravity chutes are used for the controlled transfer of materials, including fragile or sensitive components. Rust formation on chute surfacescan lead to damage and contamination, affecting product quality and safety. By employing a rust prevention agent, this invention safeguards against corrosion-related issues.
[0012] Environmental Impact Reduction:
[0013] Traditional rust prevention methods often involve the use of chemicals that may have adverse environmental impacts. This invention provides a more eco-friendly solution by utilizing Sodium Nitrite, a compound that poses minimal environmental risks. It aligns with the growing emphasis on sustainable practices in various industries.
[0014] Operational Efficiency and Cost Savings:
[0015] Rust formation on chute surfaces can impede material flow and increase friction, leading to operational inefficiencies and increased energy consumption. Regular maintenance and rust prevention are necessary to ensure optimal chute performance and reduce operational costs. This invention streamlines the rust prevention process, enhancing overall efficiency.
[0016] Regulatory Compliance:
[0017] Industries such as healthcare and pharmaceuticals are subject to stringent regulatory requirements, including cleanliness and hygiene standards. Rust formation in chutes can lead to non-compliance issues. This invention helps maintain a rust-free chute environment, contributing to regulatory compliance and product quality assurance.
[0018] In conclusion, the invention's application of Sodium Nitrite as a rust prevention agent during wash cycle completion stages is crucial for maintaining the integrity of gravity chutes in various industries. It addresses corrosion risks, environmental concerns, operational efficiency, and regulatory compliance, ultimately ensuring a clean and safe chute environment.Methods of Preferred Embodiments
[0019] The following detailed description presents several preferred embodiments and methods for implementing the innovative approach of using Sodium Nitrite as a rust prevention agent in gravity chutes. These embodiments are presented as examples and not limitations of the invention.
[0020] Embodiment 1: Gravity Chute Rust Prevention
[0021] Chute Inspection and Preparation:
[0022] Prior to initiating the rust prevention process, the gravity chute is inspected for any visible signs of rust or corrosion. Any existing rust or corrosion is removed, and the chute is thoroughly cleaned.
[0023] Automated Wash Cycle:
[0024] An automated wash system is initiated, involving stages such as presoak, cleaning, and rinsing, specifically designed to prepare the chute's surface for rust prevention.
[0025] Sodium Nitrite Solution Preparation:
[0026] A Sodium Nitrite concentrated solution is prepared in a predetermined concentration. The concentration may vary based on chute dimensions, material flow characteristics, and rust prevention requirements.
[0027] Rust Prevention Agent Addition:
[0028] After the completion of the automated wash cycle, the prepared Sodium Nitrite solution is introduced directly into the waterline below the main water valve via an access door at the top of the gravity chute.
[0029] Uniform Coating:
[0030] The Sodium Nitrite solution is evenly distributed throughout the chute, ensuring a uniform coating on the polished stainless steel inner lining.
[0031] Rust Prevention Activation:
[0032] The Sodium Nitrite forms a protective barrier on the chute's surface, preventing rust formation. Activation of the rust prevention process occurs after the Sodium Nitrite solution is applied.
[0033] Embodiment 2: Rust Prevention Concentration Control
[0034] Optimal Sodium Nitrite Concentration:
[0035] The concentration of the Sodium Nitrite solution is carefully determined based on chute-specific parameters, ensuring effective rust prevention while optimizing resource usage.
[0036] Adjustable Dosage Mechanism:
[0037] The rust prevention system incorporates an adjustable dosage mechanism that allows precise control over the amount of Sodium Nitrite solution introduced into the waterline. This mechanism ensures consistent and optimal rust prevention.
[0038] Embodiment 3: Periodic Rust Prevention
[0039] Quad-Annual Application:
[0040] The rust prevention process, including the application of Sodium Nitrite solution, is performed on a quad-annual basis, ensuring continuous rust prevention and maintenance of a rust-free chute environment.
[0041] Rust Prevention Validation:
[0042] Periodic inspections and rust prevention validation checks are conducted to confirm the effectiveness of the rust prevention process and to address any issues promptly.
[0043] These embodiments illustrate the application of Sodium Nitrite as a rust prevention agent in gravity chutes, emphasizing the importance of periodic maintenance, controlled dosage, and uniform coating to ensure the longevity, cleanliness, and rust-free operation of gravity chutes.
Claims
We Claim:Claim 1. A gravity chute rust prevention system comprising: a gravity chute having a polished stainless steel inner lining; an automated wash system configured to perform cleaning and preparation stages; a Sodium Nitrite concentrated solution, wherein said Sodium Nitrite solution is introduced into the waterline below a main water valve following completion of said cleaning and preparation stages; wherein said Sodium Nitrite solution forms a rust-inhibiting barrier on said polished stainless steel inner lining, effectively preventing rust formation.Claim 2. The gravity chute rust prevention system of claim 1, further comprising: an adjustable dosage mechanism configured to control the concentration of said Sodium Nitrite solution, said concentration determined based on chute-specific parameters, ensuring optimal rust prevention.Claim 3. The gravity chute rust prevention system of any preceding claim, wherein said Sodium Nitrite solution application process is performed on a quad-annual basis to ensure continuous rust prevention and maintenance of a rust-free chute environment.Claim 4. The gravity chute rust prevention system of any preceding claim, further comprising: a chute inspection and preparation step, wherein said chute is inspected for rust or corrosion, and any existing rust or corrosion is removed before the initiation of said rust prevention process.Claim 5. The gravity chute rust prevention system of any preceding claim, wherein the Sodium Nitrite solution forms a protective barrier on the chute's surface to prevent rust formation, and activation of the rust prevention process occurs after the Sodium Nitrite solution is applied.
Citation Information
Patent Citations
Anti -sticking material's unloading chute
CN207404337U
Method and apparatus for cleaning residual material from the dispensing elements of mixing trucks
US20060000490A1
Methods of automated garbage chute air evacuation to improve air quality
US20220370676A1