What raw materials can Ruitu bromine extraction systems process?

Our bromine extraction systems are designed for seawater, bitter brine, salt lake brine, oilfield water, bromine-bearing industrial wastewater and concentrated brine from desalination plants. The process route is selected only after we review a laboratory analysis of your feed.

Do you supply single machines or complete plants?

Both. We supply individual machines such as salt washers, roller crushers, dryers, vibrating screens, belt conveyors and hot air furnaces, and we also deliver complete turnkey lines under an EPC contract.

What is included in your EPC service?

Water quality testing, site selection support, process design, project launch preparation, equipment manufacturing and procurement, packing and shipping, installation and commissioning, operator training, finished product production guidance, and output buy-back or decommissioning support where agreed.

Can your salt washing equipment produce food-grade salt?

Our salt washing machinery is used for both food-grade and chemical-grade salt. The achievable grade depends on the crude salt composition and the standard that applies in your market, so we design the washing, crushing, drying and screening stages around your target specification.

How do you support overseas installation?

Our engineers can be dispatched to site for installation and commissioning, train your operators, and stay involved until the line produces finished product at the designed daily capacity.

How do I start a project with Ruitu?

Send us your raw material analysis, target daily capacity, product specification and site information by email or phone. Our technicians will prepare a preliminary budget estimate and an economic benefit analysis based on your budget and expected output.

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Technical Whitepaper

Industrial Evolution of Rotary Vacuum Drum Dryers & Continuous Filtration

Modern heavy chemical synthesis and mineral crystallization demand thermal separation systems that can manage heat-sensitive sludges without crystallite fracture or volatile atmospheric loss.

Thermodynamic Vacuum Efficiency

Rotary vacuum drum systems leverage lower operational boiling points under deep vacuum (-0.085 to -0.098 MPa). This ensures delicate organic salts, brominated compounds, and crystal hydrates (like dihydrate calcium chloride) evaporate surface solvents without thermal degradation or excessive carbon usage.

Fluoropolymer & Alloy Metallurgy

Modern chemical feeds produce aggressive halide corrosion. The integration of high-grade PTFE, polyolefin (PO) linings, and Hastelloy drum shells eliminates chloride stress-corrosion cracking (SCC) while maintaining heat transfer rates above 180 kcal/m²·h·°C across the rotating shell surface.

Continuous Automated Thin-Film Spreading

Moving beyond batch vacuum kettles, continuous rotary drum evaporators deposit an adjustable 0.5–2.0 mm feed slurry film onto an internally heated drum. Variable knife dischargers strip dehydrated cakes continuously, preventing operational downtime and batch-to-batch variation.

Global Procurement Intelligence

What Tier-1 Engineering & Operations Teams Demand

EPC decision-makers require dependable thermal run-rates, reduced maintenance costs, and strict compliance with global environmental standards.

Solvent Recovery Containment

Zero-leakage secondary recovery condensing circuits are required to reclaim high-value hazardous or organic solvents (acetone, ethanol, chloromethanes) at yields exceeding 98.5%.

Specific Energy Consumption

Rising plant utilities prioritize dryers achieving steam economy ratings near 1.1–1.2 kg steam/kg evaporated moisture, outperforming convective hot-air drying tunnels by 35–45%.

Regulatory Compliance

Mandatory certifications include ASME Section VIII Div 1, PED 2014/68/EU for pressurized drum vessels, and ATEX/IECEx Zone 1/21 explosion-proof electrical ratings for handling flammable dusts.

Low Downtime Scraper Design

Automated knife-positioning systems featuring spring-balanced or pneumatic blade scrapers extend drum surface lifespan and prevent metal-on-metal galling under continuous loads.

Industry 4.0 Manufacturing Ecosystem

Why Global EPC Leaders Partner with Weifang Ruitu

Located in the Binhai Economic Development Zone of Shandong, our 28,000 m² heavy chemical manufacturing base combines regional raw material access with modern precision engineering.

28,000m²

Dedicated Production Base

100%

In-House Machining & Lining

±0.02mm

Drum Dynamic Balance Precision

50+ Countries

Global Project Footprint

Cluster Supply Chain Synergies

Weifang is a global center for marine chemical production, bromine extraction, and industrial salts. We procure certified heavy plate steels, precision rotary seals, and specialized fluoropolymers within a 50-mile radius, cutting lead times by up to 40% compared to Western competitors.

CNC Machining & Thermal Balancing

Every rotary vacuum dryer undergoes computerized stress-relief heat treatment, CNC drum lathe skin turning, and ISO 1940 G2.5 dynamic balancing. This eliminates thermal run-out and ensures consistent cake peeling during high-speed vacuum rotation.

Rigorous QA Non-Destructive Testing

Quality control procedures include 100% radiographic weld testing, ultrasonic shell thickness verification, hydrostatic chamber testing up to 1.5x design pressure, and 20kV spark pore detection across all PTFE and PO liners.

Selection Guide

Ruitu Industrial Rotary Vacuum Drum Dryer Series Specifications

Standard engineered series for custom scaling. Sizing, heating media, and metallurgy are tailored to your feed lab analyses.

Model Series	Evaporation Area (m²)	Drum Speed (RPM)	Operating Vacuum (MPa)	Heating Media Type	Standard Metallurgy
RVD-05 Pro	5.0	0.5 – 6.0 (VFD)	-0.085 to -0.098	Saturated Steam / Hot Water	SS316L / PTFE Lined Pan
RVD-10 Pro	10.0	0.5 – 5.5 (VFD)	-0.085 to -0.098	Steam / Thermal Conductive Oil	Titanium Gr.2 / 2205 Duplex
RVD-25 Ind	25.0	0.3 – 4.5 (VFD)	-0.090 to -0.098	Medium Pressure Steam	2507 Super Duplex / PO Clad
RVD-50 Max	50.0	0.2 – 3.5 (VFD)	-0.092 to -0.099	Thermal Oil / High-Pres Steam	Hastelloy C276 / Titanium Gr.12

Global Use Cases

Application Scenarios Across Critical Processing Sectors

From lithium extraction in South American salars to zero-liquid-discharge (ZLD) chemical plants in Europe, our vacuum drum dryers resolve difficult solid-liquid separation challenges.

Calcium & Magnesium Salt Production

Used in dihydrate and anhydrous calcium chloride and magnesium chloride recovery. Vacuum drum drying prevents the release of trace HCl gases and prevents pasty, sticky crystalline phases during continuous evaporation.

Battery Chemical Slurries

Effective for processing battery materials (nickel/cobalt/manganese sulfates, lithium carbonate) that degrade above 85°C. High vacuum keeps temperatures low to protect particle distribution and crystal morphology.

Industrial Wastewater ZLD

Rotary vacuum dryers simplify the crystallization stage of high-salinity ZLD operations, turning concentrated mother liquors into dry, transportable salt cakes while returning condensate back to production.

Engineering FAQ

Frequently Asked Questions: Rotary Vacuum Drum Systems

Clear answers to common questions about selection criteria, thermal profiles, and turnkey plant integration.

What makes rotary vacuum drum dryers more effective than spray or tray dryers for heavy chemical pastes?

Spray dryers rely on substantial volumes of heated air, which requires large dust baghouses, risks dust explosions, and dilutes evaporated volatile solvents. Vacuum tray dryers involve labor-intensive batch loading and offer uneven heat distribution. A continuous rotary vacuum drum dryer runs in an enclosed, low-oxygen vacuum envelope. It uses conductive heat transfer via the internal drum wall, which saves energy, handles viscous slurries without clogging atomizers, and cleanly condenses evaporated solvents.

How does the Ruitu manufacturing process manage high-chloride corrosion?

For aggressive chloride operations (e.g., brine, bromine derivates, CaCl₂ crystallization), Ruitu utilizes an integrated multi-tier defense strategy. We construct liquid troughs and wet-end housings using heavy carbon-steel structures lined with 3mm–5mm high-integrity PTFE or modified PO fluoropolymers. For drying surfaces directly involved in heat transfer, we select titanium Grade 2/12, Hastelloy C276, or dual-phase 2205/2507 duplex stainless steels. Every lined subassembly undergoes 20,000-volt high-frequency non-destructive spark gap inspection prior to export delivery.

Can Weifang Ruitu supply complete EPC processing lines rather than standalone machines?

Yes. Backed by our 28,000 m² factory and EPC engineering pedigree since 2015, we provide complete, integrated plant installations. Our contracts encompass early-stage feedstock mineral assay testing, civil layout design, equipment production, factory integration testing (FAT), PLC instrumentation, site installation, and operational personnel training.

What utilities are required on site for an RVD-series vacuum drum dryer?

Primary utility connections include: (1) Saturated heating steam (typically 0.3 to 0.8 MPa) or closed-loop thermal oil; (2) Cooling water for the vapor recovery condenser (inlet temp ≤30°C); (3) Industrial electric power (380V/440V/480V 3-phase depending on national grid); (4) Instrument air supply at 0.6–0.7 MPa for the scraper knife pneumatic balance; (5) A vacuum pump system (liquid ring or dry screw roots system) capable of maintaining continuous -0.090 MPa operating levels.

How do I start an engineering consultation or request a custom sizing quotation?

Contact our engineering team by sending your slurry lab analysis (solids weight %, solvent boiling point, viscosity, heat sensitivity thresholds), target capacity (dry metric tons/day), and utility availability to [email protected] or via WhatsApp at +86-152 6561 1319. Our engineering department will return a mass-energy balance simulation, materials proposal, and baseline footprint estimate within 48 business hours.

Integrated Plant Equipment