Rajshree Group delivers complete Chemical Recovery Island solutions for kraft pulp mills — integrating black liquor evaporation, recovery boiler, causticising, and lime kiln into a seamless, optimised system.
Our 2021 project in Baroda, Gujarat included a multi-effect evaporator and recovery boiler that raised plant efficiency by 30%. Since 2003, Rajshree Group has delivered 22+ pulp and paper projects across three continents — India, Africa and the Middle East — totalling over 2,000 TPD of installed capacity.
Product Overview
The recovery island enables mills to recycle over 95% of cooking chemicals and generate significant power from black liquor combustion, transforming what would be waste into a resource.
Key Features
- ✓MEE evaporation (4–7 effects)
- ✓Recovery boiler with ESP
Applications
- Kraft pulp mill integration
- Chemical recycling and cost reduction
- Power generation from black liquor
- Green liquor for causticising
- Lime recovery and reuse
Our Turnkey Project Process
We understand your requirements, site conditions, and budget to prepare a detailed feasibility report.
Complete process design, P&IDs, civil layout, electrical single lines, and equipment specifications.
In-house and vendor-sourced equipment manufactured, quality-inspected, and dispatched on schedule.
Our engineers supervise erection, electrical, instrumentation, and commission the plant to design parameters.
Hands-on operator training, performance guarantee trial, and ongoing technical support for the life of the plant.
Get a Free Quote
Tell us your capacity requirement and we'll send a detailed technical and commercial proposal within 48 hours.
Request a Quote →Contact Our Experts
📍 Branch Office: 1913 Gunbarrel Road, Suite 105 Chattanooga, TN 37421, USA |
📍 Branch Office: D7, Varsity Chateau, Uniport Road Aluu, Port Harcourt, Rivers State, Nigeria |
Why Choose Rajshree?
- ✅ 20+ years industry experience
- ✅ 22+ successful projects delivered
- ✅ Serving India, Africa & Middle East
- ✅ Complete turnkey — single point responsibility
- ✅ After-sales support and spare parts
- ✅ Competitive pricing and financing options
How Chemical Recovery Transforms a Kraft Mill's Economics
The chemical recovery island is the financial engine of a kraft pulp mill. Without it, cooking chemical replenishment costs alone would make kraft pulping economically impossible at commercial scale. Rajshree Group designs integrated chemical recovery islands that recover over 95% of cooking chemicals while simultaneously generating steam and electricity from black liquor combustion — turning what was once a costly waste stream into a profit centre.
Our recovery islands comprise four integrated sub-systems: multi-effect black liquor evaporators (concentrating weak liquor from 15% to 65–80% dry solids), the recovery boiler (combusting heavy black liquor to generate steam and smelt), the causticising plant (converting green liquor smelt to white liquor), and the lime kiln (reburning calcium carbonate to regenerate lime). Rajshree engineers all four as a single optimised system with shared utilities and coordinated control logic.
Mills with Rajshree's recovery islands report average steam generation of 3.5–4.5 tonnes of steam per tonne of black liquor fired, with thermal efficiency of 62–68%. This steam surplus is channelled to the paper machine dryer section and process heating, reducing purchased fuel consumption by 60–80% compared to mills without recovery.
A properly designed Rajshree recovery island closes the chemical loop so tightly that makeup chemical requirements fall below 5% of total cooking chemical consumption. This dramatically reduces your mill's exposure to sodium hydroxide and sodium sulphide price volatility in the global chemical market.
Frequently Asked Questions
Countries We Serve
Rajshree Group supplies and installs our Chemical Recovery Systems — and complete pulp & paper mill machinery — for mills across India, Africa and the Middle East, with sea-freight delivery, on-site erection, commissioning and after-sales support in every market we serve.