Printing and Dyeing Wastewater Tank Mixer Agitator

SINOU is an experienced manufacturer focusing on textile environmental protection wastewater equipment, provides tailor-made Printing and Dyeing Wastewater Tank Mixer Agitator for global printing, dyeing and textile finishing factories.

Developed aiming at core pain points of printing wastewater: lots of cotton/polyester short fiber, variable pH (4~12), high-concentration dye sludge and easy equipment winding corrosion.

Equipped with anti-fiber winding curved impeller, double silicon carbide mechanical seal and optional variable frequency drive system, our agitator realizes homogeneous blending of decoloring agent, flocculant and raw dye wastewater, avoids tank bottom mud crust and optimizes biochemical treatment efficiency.

We customize shaft material, impeller size, anti-corrosion grade and installation form according to actual wastewater composition to solve diversified printing & dyeing sewage treatment troubles.

Product Details

1. Exclusive Anti-Winding Curved Impeller

(1) Adopt streamline gap curved blade exclusive for textile staple fiber; special arc gap design avoids winding of cotton, polyester, wool short fiber which is common in printing wastewater.

(2) Optional three material grades: SUS304 stainless steel, SUS316L high acid-resistant stainless steel, natural rubber lined alloy for high-chloride dye wastewater; blade edge thickened 3–5mm to resist continuous scouring of pigment particles and dyestuff residue.

(3) Optimized via CFD fluid simulation to form spiral three-dimensional circulating flow, larger flow rate with lower rotation resistance, matching variable sludge concentration of intermittent printing drainage.

2. Integrated Forged Anti-Corrosion Stirring Shaft

(1) Whole one-step forging processing, no welding seam on shaft body to prevent crack corrosion under alternating acid-alkali PH(4~12) dye medium.

(2) SUS316L solid shaft as standard option for most printing factories; customized Hastelloy shaft available for high-chloride salt-containing reactive dye wastewater.

(3) Precision mirror polishing on outer surface, reduce pigment adhesion and friction abrasion from suspended fine solid particles, greatly extend service life under long-term immersion.

3. Double Silicon Carbide Mechanical Seal Assembly

(1) Double-end hard alloy silicon carbide double sealing structure, different from single rubber seal of ordinary agitator; resistant to erosion of printing auxiliaries, surfactant and pigment fine grit.

(2) Fluorine rubber secondary auxiliary ring instead of common nitrile rubber, effectively avoid aging failure under strong alkaline dye liquor corrosion.

(3) Split detachable sealing design, realize on-site single-piece replacement without dismounting whole shaft and impeller, save maintenance labor cost for printing workshop.

4. Sealed Low-Noise Reducer Unit

(1) Fully closed oil-immersed gear reducer, dustproof and anti-dye vapor corrosion, internal gear adopt quenching alloy steel for high torque output when stirring high-viscosity concentrated dye sludge.

(2) Independent oil storage chamber with anti-leakage gasket, prevent wastewater steam penetrating into lubricating oil to cause gear rust and abnormal wear.

(3) Compact layout, save installation space for old printing factory pool reconstruction with narrow edge space.

5. IP55/IP68 Class Custom Outdoor Motor

(1) Standard IE3 high-efficiency motor, optional IE4 permanent magnet energy-saving model for carbon reduction upgrading of large-scale dyeing industrial park; insulation grade F to adapt high-temperature humid workshop environment.

(2) Double-layer sealed motor shell with anti-corrosion coating on outer surface; wiring port equipped with waterproof and anti-dye-fog rubber plug, optional explosion-proof EX motor for printing workshop with volatile organic dyestuff waste gas.

(3) Independent heat dissipation structure to avoid overheating under sudden overload from concentrated sludge inflow during centralized cloth washing shift.

6. Multi-Style Adjustable Installation Bracket

(1) Three optional mounting frames: side wall hanging bracket, top vertical fixed bracket, submerged lifting guide rail bracket, freely adapt rectangular regulating tank, round closed sludge tank of different printing factory layouts.

(2) Bracket base made of carbon steel with heavy-duty epoxy anti-corrosion coating or full stainless steel, adjustable bolt hole design to fine-tune impeller immersion depth according to real-time water level fluctuation of dye wastewater.

Lifting type bracket can lift up the whole wet part out of water without draining pool water, convenient for regular fiber cleaning and component inspection.

Technical Parameter

FAQ

1.Q: Can this agitator work under strong acid and alkaline dye wastewater with PH 4–12?

● A: Yes. Choose SUS316L shaft + fluororubber seal configuration; rubber-lined version is available for extra high chloride wastewater to avoid corrosion damage.

2.Q: Is the curved impeller really anti-winding for cotton and polyester short fibers?

● A: Specially developed gap curved blade greatly reduces fiber wrapping. Compared with straight-blade mixers, cleaning frequency drops over 70% in printing factories.

3.Q: Can I install the machine on existing old wastewater pools without civil modification?

● A: Side wall hanging bracket requires no concrete foundation transformation, ideal for old printing plant renovation projects with limited space.

4.Q: What if wastewater sludge concentration suddenly spikes during centralized production?

● A: Optional VFD frequency conversion adjusts speed flexibly to avoid motor overload; we also configure overload automatic protection inside the control cabinet.

5.Q: How long is the service life of mechanical seal in dye wastewater?

● A: Double silicon carbide + fluororubber seal normally lasts 8–12 months under normal working conditions, much longer than ordinary rubber seals.

6.Q: Does this model support outdoor open-air installation in rainy factory yards?

● A: Standard IP55 motor, optional IP68 fully sealed structure to adapt humid and rainy workshop outdoor environment.

7.Q: Can the equipment cooperate with decolorant dosing machine and filter press?

● A: Perfect matching with automatic dosing system and sludge filter press to form complete printing wastewater treatment flow.

8.Q: What’s the warranty period of Printing and Dyeing Wastewater Tank Mixer Agitator?

● A: One-year full machine warranty; non-artificial damaged spare parts can be replaced free of charge within warranty term.

Precautions for Using Printing and Dyeing Wastewater Tank Mixer Agitator

1. Pre-operation Inspection before Startup

(1)Check liquid level strictly: The impeller of Printing and Dyeing Wastewater Tank Mixer Agitator must be fully submerged by wastewater at least 200mm; dry running without enough liquid will quickly damage double silicon carbide mechanical seal.

(2)Clean floating sundries: Remove surface floating cotton staple fiber, leftover cloth scraps and massive dyestuff blocks around impeller area, prevent blade jamming after starting up.

(3)Circuit checking: Confirm control cabinet wiring is intact, no loose terminals caused by printing plant workshop vibration; check VFD parameter setting matches on-site sludge condition.

2. Startup & Running Management

(1)Adopt low-speed startup first for frequency conversion type Printing and Dyeing Wastewater Tank Mixer Agitator, gradually raise rated rotating speed to avoid instant overload from compacted tank-bottom sludge.

(2)Keep continuous running during factory centralized printing production; avoid frequent intermittent start-stop, frequent startup easily causes motor overheating and shaft fatigue deformation.

(3)Observe running state regularly: Monitor motor temperature, equipment vibration and sealing leakage; stop operation immediately once abnormal noise or liquid dripping from seal part appears.

(4)Adjust rotation speed reasonably according to real-time water quality: Increase speed when wastewater fiber & sludge concentration rises; reduce idle speed during low-drainage non-production period to save power consumption.

3. Medium & Chemical Environment Control

(1)Avoid sudden drastic PH fluctuation of wastewater pool; adding concentrated acid/alkali raw material directly near the installation position is forbidden to prevent local intense chemical corrosion on submerged parts.

(2)When cleaning tank with strong oxidizing cleaning agent, shorten equipment continuous operation time, high-oxidant liquid will accelerate aging of fluororubber sealing components.

4. Regular Daily & Periodic Maintenance

(1)Daily routine: Clean residual fiber wound on curved impeller surface every 7~10 days, prevent fiber thickening affecting mixing efficiency and increasing load.

(2)Monthly inspection: Check tightness of mounting bracket bolts and shaft connection; inspect whether seal position has trace dyestuff seepage.

(3)Semi-annual maintenance: Replace aging fluororubber auxiliary sealing ring; polish minor scratches on stirring shaft caused by pigment particles to protect main shaft anti-corrosion layer.

(4)Long-term shutdown (over 15 days): Lift submerged components out of water by lifting bracket, flush impeller and shaft with neutral clean water to wash away residual dyestuff and pigment, store after air drying to avoid dry chemical corrosion.

5. Special Working Condition Reminder

(1)For open-air outdoor installed Printing and Dyeing Wastewater Tank Mixer Agitator: Do rainproof protection for control cabinet in heavy rainy days, prevent rainwater infiltration leading to short circuit of electrical parts.

(2)Explosion-proof customized unit used in workshops with volatile dyestuff gas: Strictly prohibit dismantling motor shell in flammable gas environment.

In low-temperature winter: Preheat equipment with low-speed idle running for 3~5 minutes before formal operation to adapt increased viscosity of cold dye sludge.

Product Comparison vs Competitors

Customization & Production Process

Step1: On-site data collection & technical scheme confirmation

Engineers collect core onsite parameters including wastewater pH value, staple fiber content, tank dimension, installation space and anti-corrosion requirement from printing & dyeing factory.

Combine the unique high-fiber, alternating acid-alkali working condition of printing wastewater to design targeted structure and finish customized quotation.

Confirm impeller type, shaft material (304/316L/rubber lining), motor protection grade and installation form with customer before order signing.

Step2: CFD flow simulation & optimized drawing design

R&D team adopts CFD fluid simulation software to optimize arc radian of anti-winding curved impeller and shaft diameter, adjust blade gap size based on actual fiber concentration, issue finished production drawing after technical review.

Step3: Raw material procurement & incoming inspection

Purchase customized stainless steel blank, silicon carbide seal component, IE3/IE4 high-efficiency motor and alloy reducer parts for Printing and Dyeing Wastewater Tank Mixer Agitator. All submerged raw materials pass acid-base soaking anti-corrosion test and size inspection before warehousing, reject unqualified raw stock to avoid later corrosion failure.

Step4: CNC precision machining & anti-corrosion surface treatment

1.Main shaft adopts integral forging + CNC finish turning and mirror polishing to eliminate welding crack hidden danger;

2.Stainless steel impeller and accessories go through pickling passivation treatment; rubber-lined type parts adopt high-temperature vulcanization anti-corrosion processing for strong corrosive dye wastewater;

3.Carbon steel mounting bracket is coated with thick epoxy anti-corrosion paint.

Step5: Component assembly & electrical pre-debugging

Professional workers assemble reducer, double silicon carbide mechanical seal, stirring shaft and anti-winding impeller following assembly process standard of Printing and Dyeing Wastewater Tank Mixer Agitator. For frequency conversion models, pre-set VFD operation parameters matching printing wastewater concentration change in workshop, complete circuit inspection.

Step6: Simulated dye wastewater load factory test

Every finished agitator undergoes 72-hour continuous simulation test in lab with self-prepared high-fiber acid-alkali sewage (simulate real printing wastewater). Inspect anti-fiber winding performance, sealing leakproofness, motor temperature rise and vibration value to guarantee compliance with design standard before delivery.

Step7: Anti-corrosion packaging & export shipment

Coat submerged metal parts with anti-rust grease, wrap core components with moisture-proof plastic film; place complete set of equipment, spare sealing parts and operation manual into export plywood case to prevent damage during long-distance sea transportation for overseas printing projects.

Step8: After-sale remote guidance & on-site commissioning

Provide online video installation guidance for all clients; for bulk order and large overseas dyeing industrial park projects, arrange technical engineers to site for installation debugging of Printing and Dyeing Wastewater Tank Mixer Agitator, meanwhile train operators on daily maintenance points aiming at dye wastewater environment.

Step9: Lifelong after-sales follow-up service

Implement 1-year full machine warranty; provide cost-price spare parts supply and equipment technical upgrading service throughout the whole service life.

Inspection Items & Test Data

1. Anti-winding Test

Test condition: Sewage containing 320mg/L cotton & polyester short fiber, continuous running

72h Test result: Printing and Dyeing Wastewater Tank Mixer Agitator curved impeller has negligible fiber adhesion; no blade blocking, cleaning cycle ≥7 days. Ordinary straight blade accumulates thick fiber within 24h.

2. Anti-corrosion Immersion Test

Test liquid: PH=4 acidic dye liquid & PH=12 alkaline auxiliary liquid, soak 30 days

● SUS316L shaft: No pitting corrosion, surface intact

● SUS304 shaft: Slight discoloration only under high chloride medium Carbon steel sample obviously rusted and eroded under same condition.

3. Sealing Leakage Test

Full submerged running for 168h under dye wastewater containing pigment fine particles Double silicon carbide seal of Printing and Dyeing Wastewater Tank Mixer Agitator: Zero liquid leakage at shaft position.

4. Motor Temperature Rise & Load Test

Full-load continuous operation under high-viscosity dye sludge medium Motor temperature rise ≤38K, within F-class insulation standard; no overheat alarm.

5. Mixing Uniformity Test

Sampling 5 positions of tank after 30min operation, detect medicament concentration difference Concentration error ≤±4.2%, fully meet printing wastewater dosing homogenization requirement.

6. Power Consumption Detection

Same tank volume and mixing effect Our agitator power saving rate: 21%~26% compared with conventional common mixer.

7. Vibration Inspection

Rated speed running, vibration value ≤2.1mm/s, stable operation without abnormal shake.

Quality Inspection & Sample Policy

1. Full-process Quality Inspection Standard

(1)Raw material incoming inspection

All stainless steel, sealing parts and motors are checked for material certificate; key submerged parts pass acid-base immersion spot check before storage, unqualified materials are rejected directly.

(2)Semi-finished product inspection

Check shaft machining precision, impeller dimensional tolerance and surface anti-corrosion treatment effect during production.

(3)Finished product factory inspection

Every unit completes 72h simulated printing wastewater load test including anti-winding, sealing, temperature rise and mixing performance before delivery; issue factory inspection report.

(4)Random spot check for bulk orders

5% random sampling from each batch for repeated performance testing to stabilize overall quality.

2. Sample Service Policy

● No free finished machine sample

Complete agitator cannot be provided free of charge due to customized anti-corrosion and special impeller production cost