Author: Site Editor Publish Time: 09-20-2026 Origin: Site
Once you have clearly defined the product, production capacity, and plant construction plan, the next step is not to purchase equipment immediately, but to advance the project in the correct sequence.
Building a milk powder plant involves process design, equipment manufacturing, facility construction, utility systems, installation and commissioning, and production acceptance. If a preceding stage is not properly finalized, issues will carry over to the next, ultimately leading to equipment capacity mismatches, facility rework, budget overruns, or delays in commencing production.
From the initial proposal to start of production, you will need to complete the following thirteen stages in order.
First, you need to translate your initial concept for the plant into technical specifications that suppliers can use for the design.
You need to clarify the following:
• The type of milk powder to be produced
• The raw materials to be used
• Key components and compositional ranges of the raw materials
• Daily raw material supply capacity
• Required hourly output of qualified milk powder
• Planned daily and annual production duration
• Quality standards for the finished product
• Packaging specifications
• Project site location
• Target markets (countries or regions) for sales
• Availability of existing factory buildings
• Available local utilities and infrastructure
• Scope of work expected from the supplier
• Planned start-up date for production
If multiple products are to be manufactured, you must identify the primary and secondary products, as well as their respective production ratios. Suppliers should design the production line based on the primary product while assessing the feasibility of shared-line production for the other products.
Do not request a final quotation from the supplier until the product, raw material, and capacity requirements are clearly defined. Any quote obtained at this stage would merely be a reference configuration and cannot serve as a basis for equipment procurement or project investment decisions.
Upon completion of this stage, a design brief confirmed by both parties should be established. This document will serve as the foundation for subsequent process design, equipment selection, and performance acceptance.
Once the requirements for the plant have been established, the supplier must translate your product and capacity specifications into a complete production process.
A standard milk powder production line typically comprises processes such as raw material intake, storage, standardization, ingredient mixing, heat treatment, evaporation/concentration, spray drying, fluidized bed cooling, powder conveying, intermediate storage of the finished product, and packaging.
The specific processes employed must be determined based on product requirements.
For skimmed milk powder production, systems for milk fat separation and standardization are required. For instant milk powder, systems for particle agglomeration and post-processing must be added. For formulated milk powder, a decision must be made regarding whether to use liquid-phase ingredient mixing, dry blending, or a combination of both.
You should require the supplier to provide a material balance calculation for the entire line, detailing:
• Hourly raw material intake
• Total solids content of the raw material
• Amount of water to be removed by the evaporation system
• Concentration of the product entering the drying system
• Amount of water to be removed by the drying system
• Hourly output of qualified milk powder
• Estimated product loss during production
• Required capacity of the packaging system
The capacity of the milk powder production line must be expressed in terms of both raw material intake and qualified finished product output. Providing only the evaporation rate or the rated capacity of individual pieces of equipment is insufficient to demonstrate that the entire line can meet your production targets.
Upon completion of this stage, you should be able to confirm the production process, overall line capacity, major equipment configuration, and expected product specifications. Do not proceed to the equipment procurement stage until these details have been finalized.
Once the process route is determined, the supplier must finalize the overall layout based on equipment dimensions, operational requirements, and the production workflow.
If you are planning a new facility, the equipment layout should be established before proceeding with the detailed building design.
You should require the supplier to provide the following:
• Dimensions and weights of major equipment
• Installation height of the drying tower
• Floor and equipment foundation loads
• Locations of operating platforms
• Access routes for equipment lifting and transport
• Piping and cable routing
• Clearance for maintenance and component removal
• Flow paths for personnel, raw materials, and finished products
• Utility connection points
• Provisions for future expansion
The facility layout must also logically designate areas for raw material receiving, liquid processing, evaporation and drying, powder handling, packaging, storage, laboratory operations, and utilities.
Flow paths for personnel, raw materials, packaging materials, finished products, and waste must not conflict with one another. Additionally, the powder handling and packaging areas require considerations regarding hygienic zoning, air control, dust collection, and safety measures.
For existing facilities, the supplier must verify building height, floor load-bearing capacity, equipment entry points, available space, and maintenance access prior to design. Suitability for installation cannot be determined solely based on facility blueprints.
Upon completion of this stage, the equipment layout and facility conditions must be fully aligned; otherwise, rework during subsequent construction will be inevitable.
Whether a milk powder production line can achieve its design capacity depends not only on the evaporator and drying equipment but also on the stable supply of water, electricity, steam, refrigeration, and compressed air.
You should request the following information from the supplier:
• Water consumption during normal production
• Maximum water consumption for cleaning
• Steam pressure and peak consumption
• Total installed power capacity
• Normal operating and peak electrical loads
• Cooling water flow rate and temperature requirements
• Refrigeration capacity
• Compressed air pressure, flow rate, and quality requirements
• Hot water requirements
• Exhaust air volume
• Dust collection capacity
• Wastewater discharge volume and water quality parameters
Once you have this data, you need to verify whether local facilities—such as boilers, transformers, refrigeration systems, and water/wastewater treatment plants—can meet the requirements.
Utility equipment must be sized based on peak loads rather than average consumption. Insufficient steam limits evaporation and drying capacity; inadequate cooling affects the temperature of the finished product; and insufficient wastewater treatment capacity restricts production and cleaning schedules.
Do not finalize the production line configuration until the utility capacities have been confirmed.
You are ready to formally compare suppliers only after the product specifications, production capacity, process flow, facility layout, and utility requirements have been largely defined.
When requesting quotes from different suppliers, you must provide identical design specifications and scopes of supply; otherwise, the resulting prices cannot be directly compared.
Key areas for comparison include:
• Experience with similar milk powder projects
• Capability to perform material balance calculations for the entire line
• Alignment of the process flow with product requirements
• Compatibility of equipment capacities across different process stages
• Clarity regarding equipment materials and hygienic design
• Completeness of utility consumption data
• Provision of a general equipment layout
• Clarity regarding the scope of automation and control
• Clarity regarding responsibilities for installation and commissioning
• Commitment to performance acceptance testing for the entire line
• Availability of spare parts and long-term technical support
If one supplier includes process piping, control systems, installation, and commissioning in their scope, while another supplies only the main equipment, the two quotes cannot be directly compared.
If you lack an in-house dairy engineering team, you should select a "turnkey" supplier capable of taking unified responsibility for process design, equipment interfacing, system commissioning, and final performance. Avoid piecing together a production line from multiple suppliers without a designated system integrator in charge.
The goal of this phase is not to find the supplier with the lowest equipment price, but to identify a partner capable of taking responsibility for the performance of the entire production line.
Once the supplier has been selected, the preliminary proposal must be converted into a detailed design suitable for equipment manufacturing and construction guidance.
You should require the supplier to complete the following:
• Final process flow
• Equipment list and technical specifications
• General equipment layout
• Equipment foundation and load data
• Production piping design
• Valve and instrumentation configuration
• Electrical and control design
• Design of operating platforms and supports
• Utility interfaces
• Cleaning scope and circuits
• Safety protection and interlock requirements
• Space requirements for equipment installation and maintenance
Concurrently, you must complete the design of the plant building and auxiliary facilities in compliance with local regulations regarding construction, food safety, fire safety, environmental protection, and occupational safety.
All equipment interfaces, piping connections, and scopes of responsibility must be confirmed in the drawings. Connections between the equipment and the building, utilities, or other suppliers must not rely on verbal instructions.
A formal review should be conducted upon completion of the detailed design. Drawings should not be used for equipment manufacturing or on-site construction until they have been confirmed by both parties.
Once equipment fabrication begins, you should not wait until the pre-shipment stage to check on project progress.
You need to confirm the following with the supplier:
• Equipment fabrication schedule
• Key materials and components
• Completion dates for critical equipment
• Quality inspection items
• Pre-shipment inspection requirements
• Technical documentation submission schedule
• Packaging and shipping methods
• Data regarding embedded parts and interface connections required for on-site installation
For core systems—such as evaporation, drying, and automatic control—key components, equipment interfaces, and control logic should be verified during the fabrication stage.
If design changes occur during fabrication, the supplier must simultaneously update equipment drawings, facility interface details, and utility data; modifications must not be made to the equipment without notifying the on-site construction team.
Prior to shipment, verify the quantity, specifications, appearance, auxiliary components, and technical documentation. Any issues identified should be rectified before the equipment leaves the factory; do not defer resolving all problems to the on-site installation phase.
While the equipment is being manufactured, you may proceed with the construction of the facility and utility systems in parallel; however, all construction work must strictly adhere to the approved drawings.
On-site construction inspections should focus on the following:
• Equipment foundation locations and dimensions
• Load-bearing capacity of floor slabs and steel structures
• Installation space for the drying tower
• Equipment lifting access and transport routes
• Wall, floor, and drainage designs
• Piping and cable routing
• Utility connections (steam, electricity, water, and compressed air)
• Ventilation and dust collection systems
• Wastewater collection and treatment facilities
• Conditions in packaging areas and warehouses
Equipment foundations, reserved openings, and embedded components must be re-verified with the supplier prior to construction. Dimensional errors can directly impact equipment positioning and the installation schedule.
Once facility construction is complete, a joint inspection of the site conditions should be conducted by the equipment, construction, and installation teams. Equipment delivery should only be scheduled once the site is fully prepared for transport, lifting, positioning, and connection.
Upon the equipment's arrival at the site, the processes of unloading, hoisting, positioning, connecting, and inspecting must be carried out sequentially in accordance with the general layout and installation requirements.
Installation activities typically include:
• Equipment positioning and anchoring
• Installation of operating platforms and supports
• Connection of process piping
• Connection of utility piping
• Installation of valves and instruments
• Cable laying and field wiring
• Control system connections
• Thermal insulation for equipment and piping
• Connection of ventilation and dust collection systems
Generally, there are two scenarios:
If the installation is performed by a local construction contractor, the equipment supplier must provide installation guidance and quality inspections. The construction contractor must not arbitrarily alter piping routes, equipment locations, or connection methods simply for the sake of on-site convenience.
Any design deviations discovered during installation must be addressed only after confirmation by the supplier. Unconfirmed on-site modifications may compromise sanitary design, production capacity, and equipment warranties.
Once all installation work is complete, a comprehensive inspection of the equipment, piping, electrical systems, instrumentation, and safety devices must be conducted. Do not proceed directly to commissioning without formal acceptance of the installation.
The goal of commissioning is not merely to start up the equipment, but to confirm that all systems operate together safely and stably in accordance with the design logic.
The correct commissioning sequence is:
1. Inspect individual pieces of equipment
2. Inspect piping and valves
3. Calibrate instruments
4. Test motor rotation and equipment movements
5. Test safety protections and interlocks
6. Complete water circulation tests
7. Check flow, pressure, and temperature controls
8. Verify cleaning procedures
9. Complete integrated line testing
All equipment operations, control programs, safety interlocks, and cleaning circuits must be verified before raw materials are introduced.
You should also arrange for production, quality, and maintenance personnel to participate in commissioning. Only by personally engaging in equipment inspections and operational training will they be able to correctly operate the production line after the supplier has left the site.
Trial production using raw materials must not proceed until system commissioning is complete.
Once system commissioning is successfully completed, you may proceed to trial production using actual raw materials.
Trial production should commence at a low load to verify the continuous operation of raw material intake, heat treatment, evaporation, drying, powder conveying, and packaging, before gradually ramping up to the design load.
Key aspects to verify during trial production include:
• Stability of the feed flow rate
• Whether the concentrate meets specifications after evaporation
• Stability of the drying process
• Whether the moisture content of the finished product meets standards
• Whether product solubility and bulk density meet requirements
• Whether powder loss is within normal limits
• Whether the finished product temperature is suitable for packaging
• Whether the packaging system can continuously handle the production output
• Effectiveness of cleaning procedures
Any parameter adjustments made during trial production must be documented to finalize the standard production parameters for each product.
The primary objective of trial production is to fine-tune the process and train personnel, rather than to immediately demonstrate that the production line has passed performance acceptance. Formal acceptance testing should only proceed once product quality and equipment operation have stabilized.
Performance acceptance must be conducted based on the raw materials, products, output rates, and continuous operating durations specified in the contract.
You should require the supplier to demonstrate that:
• Hourly raw material processing capacity meets contractual requirements
• Hourly output of qualified milk powder meets contractual requirements
• Finished product quality meets technical standards
• Product recovery rate reaches the agreed level
• Steam, electricity, and water consumption align with commitments
• Powder loss remains within permissible limits
• The packaging system matches the output capacity of the entire line
• The production line operates continuously and stably
• Cleaning times and results meet requirements
Acceptance data should be recorded jointly by both parties, and product quality must be tested using agreed-upon methods.
Short-term production of milk powder does not constitute grounds for declaring acceptance complete. Achieving rated capacity on a single evaporator or dryer does not imply that the entire line has achieved its designed output.
If certain performance indicators fail to meet contractual requirements, the scope of corrective actions, completion timelines, and the method for re-acceptance must be clearly defined. Do not sign the final acceptance documentation until these issues have been resolved.
Your work does not end once the production line passes performance acceptance. Transitioning the equipment from trial runs to stable commercial production requires comprehensive production and maintenance management.
Before commencing full-scale production, ensure the following are in place:
• Equipment operating instructions
• Process parameters and product formulations
• Cleaning procedures
• Maintenance schedules
• Lists of wear parts and spare parts
• Electrical and control documentation
• As-built drawings for equipment and piping
• Commissioning and acceptance records
• Operator training records
• Quality inspection requirements
During the initial production phase, continuously record output, product quality, energy consumption, product loss, and equipment downtime (including cleaning time). These data help determine whether the production line is maintaining the operational status achieved during acceptance.
Avoid frequent product changes or increasing the load immediately after acceptance. Allow the operations team time to familiarize themselves with the line; once the primary product is being produced stably, gradually introduce other products and production tasks.
If you are preparing to build a milk powder plant, the project should proceed in the following sequence: requirements confirmation, process design, facility planning, utility system design, supplier evaluation, detailed design, equipment manufacturing, facility construction, equipment installation, system commissioning, raw material trial production, performance acceptance, and full-scale production.
Clear documentation, data, and confirmation results should be generated at each stage. Do not rush into the next stage before the current one is complete.
Ultimately, what you need is not merely a set of equipment capable of starting up, but a complete production line that—using specified raw materials—can consistently produce milk powder meeting quality standards while achieving target output, energy consumption, and product recovery rates.
