Solving the Pain Points of Manual Cleaning | Automatic Control with No Dead Ends

CIP In-Situ Cleaning System: Comprehensive Analysis & Selection Guide

I. Core System Composition

1. Liquid Storage Module

• Includes clean water tanks, alkali tanks, acid tanks, and recovered water tanks for storing different types of cleaning media. Tanks are usually made of stainless steel, equipped with liquid level gauges and temperature sensors to real-time monitor media inventory and temperature.
• For CIP systems in medium-sized fruit juice production lines, the configuration typically includes a 5-10m³ clean water tank and 2-5m³ acid/alkali tanks to meet the media demand for a single full-process cleaning.

2. Conveying & Circulation Module

• Core component: Centrifugal pumps (or sanitary diaphragm pumps), responsible for delivering cleaning media to the pipelines and tanks of equipment to be cleaned, while realizing closed-loop circulation of media.
• Equipped with a pipeline valve group (pneumatic ball valves, butterfly valves), the direction of media flow is controlled by the central control system to switch between different cleaning stages.

3. Temperature Control & Proportioning Module

• Equipped with steam heaters or electric heaters to accurately heat cleaning fluids to the set temperature (e.g., 60-80℃ for alkali cleaning, 40-50℃ for acid cleaning).
• Intelligent chemical proportioning devices can automatically add acid and alkali cleaning agents, controlling media concentration (e.g., 1-2% NaOH, 0.5-1% HNO₃) to avoid errors and waste from manual proportioning.

4. Control & Monitoring Module

• Includes a PLC central control system, touch screen, and various sensors (pressure sensors, flow sensors, conductivity sensors). It supports preset cleaning programs and real-time monitoring of parameters such as pressure, flow, and media concentration during the cleaning process.
• Enables automatic storage and traceability of cleaning data to meet industry compliance requirements.

5. Auxiliary Modules

• Filters: Filter impurities in the cleaning fluid to prevent pipeline blockage.
• Defoamers: Eliminate foam generated during cleaning to ensure cleaning effectiveness.
• Drainage & waste liquid treatment components: Initially neutralize waste liquid after cleaning to reduce environmental treatment pressure.

II. Standard Working Process

1. Pre-Rinsing

• Circulate room-temperature clean water to rinse the inner wall of the equipment, removing most visible residues (e.g., pulp and sugar residues in fruit juice production lines). Rinsing time: 10-15 minutes. Wastewater is directly discharged.

2. Alkali Cleaning

• Deliver heated alkaline cleaning agents (e.g., NaOH solution) and circulate in the equipment for 20-30 minutes. Utilize the saponification effect of alkaline substances to remove stubborn residues such as grease, protein, and polysaccharides. Part of the alkali solution can be recovered to the alkali tank for reuse after cleaning.

3. Intermediate Water Rinsing

• Rinse the equipment with clean water to remove residual alkali solution and saponification products, avoiding acid-base neutralization that may affect subsequent cleaning effectiveness. Rinse until the pH value of the discharged water is close to neutral. The clean water from this stage can be recovered to the recovered water tank for the next pre-rinsing.

4. Acid Cleaning

• Deliver acidic cleaning agents (e.g., HNO₃ or citric acid solution) and circulate for 15-20 minutes to remove inorganic scales such as water scale and metal oxides on the inner wall of the equipment, preventing equipment corrosion and microbial growth.

5. Final Rinsing

• Perform final rinsing with purified water or sterile water to remove residual acid solution and all impurities, ensuring no cleaning agent residues on the inner wall of the equipment to meet food and pharmaceutical hygiene standards. Pipeline drying can be performed simultaneously after rinsing.

III. Core Advantages

1. Stable & Compliant Cleaning Effect

• Standardized program control eliminates manual operation differences, covering equipment dead ends (pipeline bends, sealing gaps). The microbial residue rate can be controlled below 10 CFU/cm², meeting strict standards such as GMP and FDA.

2. Cost Reduction, Efficiency Improvement & Adaptability to Continuous Production

• No need to shut down or disassemble equipment. A single cleaning takes only 1-2 hours and can run automatically during production gaps without occupying core production capacity.
• Reduces overall costs by over 70% in the long term (labor, consumables, equipment maintenance).

3. High Safety & Compliance

• Eliminates risks of manual contact with acid/alkali chemicals and high-altitude operations, resulting in an extremely low safety accident rate.
• Full traceability of cleaning data facilitates industry hygiene inspections and avoids compliance penalties.

IV. Industry-Specific Selection Key Points

1. Food & Beverage Industry (Fruit Juice, Dairy Products)

• Prioritize tanks and pipelines made of sanitary-grade stainless steel, equipped with media recovery modules to reduce water and cleaning agent consumption.
• Support seamless connection with filling machines and filter components.

2. Pharmaceutical Industry

• Must be equipped with SIP (Sterilize-In-Place) functionality to achieve integrated cleaning + sterilization.
• The control module must meet pharmaceutical-grade data traceability requirements, supporting electronic signature and audit trail.

3. Small-Scale Production Lines/Workshops

• Optional compact CIP units to reduce initial investment, supporting manual/automatic dual-mode switching to balance flexibility and basic cleaning needs.