Standard equipment or a custom system?
RO above 1000 L/h: when to review a custom system
Review the complete water system when your demand goes beyond the standard equipment range, or when the source water, required quality and site conditions need a different arrangement.
Capacity and treatment route answer different questions. Start with your production requirement, then review the treatment, storage, distribution and operating arrangement together.
When to start a project review · Capacity versus treatment route · Supply scope · Prepare your brief
Look beyond the nominal flow
Qingze’s standard RO equipment range includes 250, 500 and 1000 L/h models. Demand beyond this range is a reason to review a project-specific arrangement. Requirements within the range may also need a review when the feedwater, production or site conditions differ from the standard equipment scope.
Daily and peak demand
Provide daily volume, peak simultaneous flow, peak duration and hours available for water production. Explain how storage and any standby requirement fit your operating schedule.
Source and required water quality
Send the original source-water report and identify the quality needed by the production process. Keep source results separate from final-water requirements.
Storage and transfer
Describe existing tanks, delivery pumps and distribution. Increasing RO output alone does not establish that water can be stored and delivered where it is needed.
Site and controls
Confirm available space, incoming water, electrical supply, drainage and control requirements. Identify the equipment and site services that must work together.
Why not simply install a larger unit or parallel units?
A larger RO unit or several units may be considered as part of a design, but neither arrangement automatically resolves feedwater supply, pretreatment loading, storage, delivery or operating continuity.
Evaluate the arrangement against the actual demand profile and site. Confirm how much water each stage must handle, what existing equipment can be retained, and how the system will operate during the available production and maintenance periods.
A custom system is not defined by an extra RO pass
Existing projects show different treatment routes at different capacities. Their requirements are examples to review, rather than rules for selecting another factory’s system.
2 m³/h single-pass RO
The Senegal aluminium-processing project used a single-pass RO route with pretreatment. Its source water and production requirement informed the project review.
5 m³/h two-pass RO
The Bijie production-water project used two-pass RO together with storage and transfer equipment. The second pass is part of the treatment route, rather than a rule that follows from flow alone.
Choose single-pass RO, two-pass RO or RO + EDI from the source water, intended use and required quality. Do not choose the route solely from the requested litres per hour.
Separate equipment capacity from the complete supply scope
List pretreatment, RO, any further treatment, storage, transfer or circulation, controls and instruments individually. Confirm incoming services, connecting pipework, electrical work, drainage and installation responsibilities.
For reference, QZ-RO250 and QZ-RO500 standard scope includes pretreatment and the RO unit, without a raw-water pump, water tanks or a distribution pump. QZ-RO1000 includes a raw-water pump, pretreatment and RO unit, without water tanks or a distribution pump. A custom project’s supply list must be agreed separately.
Send a project brief before deciding the equipment combination
- Project country, production application and intended water use.
- Source-water analysis and required final-water specification.
- Daily demand, peak flow and duration, and available production hours.
- Existing treatment, storage, transfer and distribution equipment.
- Storage, standby and operating requirements.
- Electrical supply, available space, drainage and controls.
- Equipment and site support to include; information still to be confirmed.
Start with what is known. A project review can identify the missing information before a configuration is confirmed.
Discuss your custom RO requirements
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