Centrifuge Application Guide
Decanter Centrifuge for CMC Production and Solvent Separation
A decanter can be one candidate in CMC process separation, but CMC identity, process stage, solvent composition, washing, rheology, recovery and containment must be reviewed before principle selection.
Direct answer
CMC process separation can involve washing, de-liquoring and solvent-recovery interfaces, but “CMC” does not select a machine. A decanter may be screened for a suitable suspension and settling duty; filtering principles may remain relevant in other process stages. State whether methanol, IPA or another liquid is present, the actual composition, solids, rheology, washing sequence, recovery route and containment requirement.
What material and process boundary must be identified?
Identify the exact cellulose derivative, process stage, reaction or washing history, solvent and water composition, salts or by-products, solids concentration, rheology, temperature and downstream recovery route.
Do not transfer a result from another grade, plant or supplier without checking that feed preparation, liquid phase, particle behaviour and measurement method match.
What feed data change the decision?
| Variable | Buyer input | Selection effect |
|---|---|---|
| Solvent system | Methanol, IPA, water or other components with ranges and SDS | Containment, materials, recovery and hazard review |
| Rheology | Solids, viscosity method, shear and temperature dependence | Feed, settling and transport |
| Washing stage | Sequence, liquid, ratio, target and recycle | Principle and process interface |
| Recovery route | Solids and liquid destinations, solvent recovery and nitrogen | Equipment boundary and site integration |
Which centrifuge principles should be screened?
The rows below are routing questions, not universal recommendations. A qualified review can keep more than one principle open until representative behaviour and project priorities are understood.
| Principle | Review when | Do not assume |
|---|---|---|
| Decanter | Suspension settles and solids can be conveyed within the actual rheology. | Do not treat CMC name as proof. |
| Filtering principle | A defined stage forms a retained and drainable cake. | Do not assume pusher fit. |
| Batch arrangement | Segregation, controlled wash or discharge favours a batch sequence. | Do not assume hygienic or hazardous-area scope. |
| Process change / other equipment | The required result is not supported by centrifuge behaviour. | Do not force one platform. |
When is a pusher route credible?
Do not recommend a pusher by default. It becomes credible only if the actual CMC-stage solids form a stable, screen-retained, drainable cake and transport and containment can be demonstrated.
Screen retention, stable cake formation, continuous transport and acceptable breakage should be demonstrated. A familiar chemical name does not establish those conditions.
When is a decanter route credible?
A decanter becomes credible when representative suspension settling, rheology and screw conveyance support the solids and liquid targets through the stated feed range.
Settling response, density difference, rheology, centrate target and screw transport should be reviewed together. Fine solids alone do not guarantee a successful decanter duty.
What should a representative material test record?
- Sample identity, production source, collection date, storage and conditioning
- Feed composition, solids, temperature, particle or settling observations and variability
- Test apparatus, operating sequence, settings and any conditioning aid
- Preserve solvent composition, solids, temperature and shear history during sampling and testing.
- Record washing or dilution stage, liquid recovery, rheology and containment observations.
- Do not infer full-scale hazardous-area conformity from a material test.
- Mass-balance boundary, sample locations, analytical methods, raw results and observations
- Limits of scale-up and open questions for engineering review
How should required results be written?
| Result | Required boundary |
|---|---|
| Cake moisture or dry solids | Sampling point, method, feed envelope, stable-operation period and averaging |
| Solids recovery | Mass-balance boundary, sampling period and analysis method |
| Filtrate or centrate quality | Sampling location, solids method and conditioning basis |
| Purity or wash result | Wash liquid, sequence, ratio and product analysis method |
| Allowable breakage | Before/after sampling and agreed particle method |
| Throughput | Solids or slurry basis, composition, temperature and operating range |
Which materials and corrosion inputs are required?
Provide methanol, IPA, water, salts, residual reagents, cleaning fluids, temperature and concentration ranges. Review elastomers, seals and every wetted component, not only the bowl.
Preferred wetted material is a buyer input, not proof of compatibility. Ask the selected source to identify exact component scope, material evidence, fabrication limits, cleaning exposure and exclusions.
What safety and containment questions must be closed?
State flammable solvent status, flash point, vapor hazard, zone or division, inerting and oxygen-limit target if known, and the buyer-requested explosion-protection standard. Nitrogen availability and solvent-recovery interfaces must be explicit.
If flammable solvent or combustible hazard is present, provide solvent identity, flash point, vapor data, area classification, inerting requirement and the buyer-requested standard. XiangtanExport does not state that a source is ATEX or IECEx compliant without scoped evidence.
What process interfaces belong in the RFQ?
- Upstream vessel, crystallizer, reactor, thickener, pump or conditioning step
- Minimum, normal and maximum feed and credible upset conditions
- Downstream solids handling, dryer, dissolution, product recovery or disposal
- Liquid recovery, recycle, treatment or solvent-recovery route
- Control signals, interlocks, utilities, layout, lifting and maintenance access
- Responsibility for piping, cabling, foundation, installation and commissioning
Which supplier questions prevent scope gaps?
- Which submitted feed data and test evidence support the proposed principle?
- What assumptions, exclusions and missing variables remain?
- Which wetted materials apply to each component and what evidence is offered?
- How are cake, recovery, liquid quality, washing and throughput results measured?
- Which process results can be demonstrated at material-test, FAT and SAT stages?
- What drawings, manuals, certificates, spares and commissioning inputs are included?
- Which deviations from the controlled RFQ require buyer approval?
How should material test, FAT and SAT be separated?
Material testing examines separation behaviour. FAT verifies the agreed factory mechanical, control, safety and document scope. SAT verifies site integration and, when contracted, project performance under a stated feed and utility basis. Do not use a no-load FAT as evidence of cake moisture, recovery or throughput.
Which documents should be in the contract?
- Approved process and equipment data sheet
- General arrangement, interface and foundation information
- Wetted-material schedule and requested source evidence
- Motor, controls, instruments, interlocks and utility list
- Inspection and test plan, FAT/SAT protocols and records where included
- Operation, safety, cleaning and maintenance manuals
- Wear and spare-parts list
- Packing, preservation, lifting and shipment documents
- Buyer-required conformity evidence: availability subject to source confirmation
What should the technical RFQ include?
Use the dedicated CMC fields for solvent composition, washing stage, post-wash solids, rheology, alcohol recovery and nitrogen protection, and attach the P&ID, SDS and process data sheet.
Unknown values may be marked unknown. Keeping an explicit gap is safer than inserting a catalogue assumption that later becomes a contract conflict.
Submit the centrifuge technical RFQ
Preserve process, result, site, document and attachment inputs in one inquiry.
Related principles and buyer guides
Commercial sourcing and export support
Sources & references
GB 19815-2021, Centrifuge—Safety requirements, National Public Service Platform for Standards, published 2021-04-30, effective 2022-05-01, accessed 2026-09-07.
GB/T 10895-2025, Centrifuge & separator—Measurement and evaluation of mechanical vibration, National Public Service Platform for Standards, published 2025-08-01, effective 2026-02-01, accessed 2026-09-07.
Public sources establish standards context only. Supplier identity, model, performance, materials, certification evidence and commercial terms remain private and source-specific.
Products and application references
From requirement to sourcing decision
Define
Application, specification, quantity, destination and evidence needs.
Compare
Align supplier responses, methods, exclusions and commercial basis.
Verify
Check the agreed company, product, document or on-site scope.
Control
Record samples, approvals, changes, inspection and shipment milestones.
Close
Deliver the agreed record, open-item list and next-step decision.
Related sourcing and trade services
Key facts
- Independent B2B sourcing and supplier matching
- Source-specific availability and evidence confirmed during quotation
- No public supplier directory or factory-identifying model disclosure
- Manufacturing source, specification and commercial terms are confirmed for the actual project
Buyer checklist
- Define the application and destination
- Attach a drawing, specification or approved reference where available
- State quantity, timing, packing and delivery needs
- List tests, certificates and inspection requirements
- Approve deviations and release criteria in writing
Documents buyers should request
- Current source-specific specification
- Representative or lot-linked test record as applicable
- Packing and traceability information
- Destination-specific compliance evidence where required
- Quotation deviations and final contractual document list
Common mistakes
- Comparing prices before specifications and methods match
- Treating a general source statement as product- or lot-specific proof
- Assuming regional relevance means every product is locally manufactured
- Leaving inspection, documents or remedies until after the order
Frequently asked questions
Does this page select a machine for every CMC process separation project?
No. It identifies data and tests needed for a project-specific engineering review.
Can two plants using the same material need different principles?
Yes. Feed preparation, particle behaviour, liquid properties, variability, washing and required results can differ.
Can a supplier catalogue value be used as a guarantee?
Not without an agreed feed envelope, measurement method, conditions and source commitment.
Are ATEX, IECEx or CE included automatically?
No. Required standards are buyer inputs; source-specific availability, scope and evidence require confirmation.
When is a material test useful?
When feed behaviour or scale-up assumptions materially affect principle, design or performance risk.
Does XiangtanExport reveal the supplier pool?
No. Candidate sources and scorecards stay private unless disclosure is approved for the transaction.
Send process data for technical review
Provide the material, feed envelope, separation target, utilities, site and document requirements. We will identify missing data before private supplier matching.
Review and evidence note
Last reviewed: 2026-09-07
This application page provides non-numeric selection logic. It does not confirm a supplier, machine size, performance guarantee, material compatibility or certification.
Final product availability, specification, documentation and commercial terms are confirmed during supplier matching and quotation.