PTFE Lined Chemical Liquid Agitation Tank

PTFE Lined Chemical Liquid Agitation Tank belongs to dedicated liquid-phase circulation agitation equipment. Different from mixing vessels focusing on batch batching, this agitation tank is mainly designed for sustained circulating stirring of single-phase corrosive liquid, preventing sedimentation of suspended solids and keeping uniform liquid-phase composition in continuous production loops. All wetted components including tank cavity, stirring shaft and impeller adopt integrated PTFE protection, avoiding metal erosion and ion contamination caused by corrosive circulating fluid. It can be connected with lined pipelines, tee fittings and valves to build closed liquid circulation loops, widely used for continuous-flow working conditions of overseas chemical, waste-liquid treatment and lithium-material manufacturing plants.

Complete Technical Specification Table

Working Principle

1. Material structure principle

-Outer shell: Q245R pressure-vessel carbon-steel shell bears system pressure, installation load and cyclic thermal stress of circulating liquid. -Inner anti-corrosion barrier: Sodium-activated PTFE sheet is vacuum-laminated onto tank inner wall; stirring shaft and impeller are fully wrapped by PTFE material. Chemically inert PTFE isolates corrosive circulating liquid from all metal contact surfaces, preventing erosion when liquid keeps flowing and stirring.

2. Agitation & matched process logic

The variable-frequency drive unit drives the PTFE-lined impeller to rotate continuously, generating circumferential circulating flow inside tank cavity. The liquid circulation effect inhibits solid-particle sedimentation, maintains homogeneous concentration of corrosive liquid, and realizes buffer-agitation function in continuous-flow production. Matched typical process scenarios:

1. Continuous circulating agitation for corrosive feed liquid before pumping delivery;

2. Suspended-solid liquid anti-sedimentation buffer for waste-acid treatment lines;

3. Pre-agitation of raw-material liquid for new-energy raw-material feeding system;

4. Closed-loop circulation with PTFE lined pipeline, realizing uninterrupted liquid-phase buffer-agitation for whole production line.

Core Product Advantages

1. Full-Set Lined Mixing Assembly Not only tank inner wall; agitator shaft and impeller are entirely wrapped by PTFE material. Avoid galvanic corrosion caused by bare metal stirring parts contacting aggressive chemicals during high-speed blending.

2. Optional Jacket Temperature-Control Structure Integrated outer jacket supports steam heating or coolant circulation, keeping stable temperature while dissolving and mixing corrosive components, adapting temperature-sensitive batching workflows.

3. Multi-Impeller Solution For Different Viscosity Supply propeller, anchor-type, turbine-style PTFE-lined impellers, matching low-viscosity liquid blending, solid dissolving and high-viscosity slurry-mixing separately.

4. Low-Residue Smooth Inner Surface Smooth PTFE lining reduces material adhesion. Convenient inner-tank flushing when switching different-formula batches and lowers cross-contamination risk.

5. Adapt Batch & Semi-Continuous Production Modes Suitable for intermittent batch batching and semi-continuous circulating premixing. No complex reaction-related configuration, focusing on blending efficiency for chemical-plant daily material preparation.

6. Unified Anti-Corrosion Flange Compatibility HG20536 standard full-lined flanges, seamless docking with Zhuoyan full-series lined pipeline, tee, valve and storage-tank for whole-batching-system one-stop procurement.

Main Application Fields

Focused on continuous-flow liquid-phase circulation and anti-sedimentation buffer-agitation working scenarios, with overseas delivery records for Southeast-Asia and Middle-East chemical industrial parks:

1. Fine-chemical production line: Circulation agitation of corrosive feed liquid before pump conveying

2. Environmental-protection waste-liquid station: Anti-sedimentation buffer-agitation for acidic waste liquid containing fine suspended particles

3. New-energy material plant: Continuous pre-agitation of lithium-salt corrosive circulating liquid

4. Inorganic-chemical workshop: Homogenizing agitation for mixed acid circulating delivery system

5. Pilot-test production line: Liquid-phase circulating buffer for continuous corrosive-medium test process

6. Auxiliary loop of rectification process: Condensate buffer-agitation for corrosive distillate

Operation Precautions

1. Medium restriction: Only molten alkali metal and chlorine trifluoride will erode PTFE lining; for fluorine-containing suspended-particle circulating liquid, select upgraded 3 mm thickened lining.

2. Agitation startup rule: Do not start stirring under empty-tank condition; liquid level must submerge impeller completely before motor startup, to avoid dry-run wear on PTFE impeller.

3. Temperature-shock control: Prevent sharp hot-cold alternation, heating-cooling rate should not exceed 12 ℃ per hour, reduce thermal-stress-caused lining-delamination risk.

4. Liquid-level management: Operating liquid-level shall be kept between 50 %-80 % of total tank volume; too-low liquid level will cause impeller exposure and lining abrasion.

5. Prohibited modification: Do not perform on-site welding, drilling or cutting for tank shell or stirring shaft; high temperature will destroy PTFE lining bonding performance.

6. Foreign-object prevention: Avoid hard metal fragments entering tank cavity; hard debris will scratch lining surface under rotating agitation scouring.

Routine Maintenance Guide

1. Periodic lining inspection: Conduct full-wall spark leakage scanning every 8-12 months. Emphasis inspection for stirring-shaft penetration position, nozzle joints and tank bottom easy-to-abrade area.

2. Agitation system routine check: Each shift observes motor running noise and shaft vibration; excessive vibration shall stop equipment for troubleshooting to avoid impeller collision scratching lining.

3. Inner-tank cleaning: Stop agitation and cool down tank fully before opening manhole for cleaning; only adopt soft-brush and compatible solvent flushing; steel-wire brush or hard scraper is strictly forbidden.

4. Flange & shaft-seal maintenance: Check PTFE gaskets and shaft-seal components quarterly; replace aging deformed sealing parts timely to prevent circulating-liquid leakage.

5. Outer-shell protection: For outdoor-installed agitation tank, inspect anti-rust paint every 2 years, repair peeling paint to protect carbon-steel shell from atmospheric corrosion.

6. Spare-parts reserve: Store matched PTFE-lined impeller and sealing accessories in warehouse; ordinary metal spare parts cannot replace anti-corrosion stirring components.

FAQ

Q1: What is the main difference between this PTFE Lined Chemical Liquid Agitation Tank and ordinary mixing vessel?

A: This agitation tank is oriented for continuous-flow circulating liquid anti-sedimentation and buffer-agitation; mixing vessel focuses on intermittent batch material batching and high-shear homogenization.

Q2: Is it allowed to start the agitator when the tank is empty?

A: Strictly forbidden. Impeller must be fully submerged by liquid medium before startup, dry-running will scratch and wear PTFE-lined impeller rapidly.

Q3: Can this agitation tank handle circulating liquid containing fine suspended solid particles?

A: Yes, select 3 mm thickened lining version for suspended-particle scouring medium, please provide medium-composition information for our technical evaluation.

Q4: Can it connect to existing fluorine-lined pipeline to form continuous liquid-circulation loop?

A: It follows HG20536 unified full-lined flange standard, supports seamless docking with full-series PTFE-lined pipe fittings.

Q5: What inspections will each agitation tank pass before factory delivery?

A: Every tank undergoes full-wall spark scanning, hydraulic pressure holding test and static agitation run-in test for stirring-system performance verification.

Q6: What items are covered in official warranty scope?

A: Carbon-steel shell 10-year structural warranty; PTFE lining 5-year warranty (exclude artificial scratch, foreign-object impact and mis-operation damage); stirring-motor and impeller accessories 2-year warranty.