Sodium Sulfite (Na₂SO₃) Production Plant & Complete Production Line Equipment

Production Line Basic Information

We provide full‑turnkey Sodium Sulfite (Na₂SO₃) production plant and complete sodium‑salt chemical production equipment for global chemical investors. Our Na₂SO₃ production line adopts mature sulfur dioxide absorption and neutralization crystallization process. Using soda ash or sodium hydroxide as raw materials, the production workflow includes raw material preparation, SO₂ gas absorption reaction, neutralization, crystallization, solid‑liquid separation, drying, crushing and screening to produce high‑quality industrial‑grade anhydrous sodium sulfite.

The complete production system covers raw material feeding unit, gas‑liquid absorption reactor, crystallization system, filter separation equipment, drying unit, dust removal system and PLC automatic control system. Customized capacity is supported. The whole line realizes continuous closed‑cycle production, effectively controls oxidation rate, impurity content and product whiteness, complying with international industrial‑grade sodium sulfite standards.

Core Production Advantages

• Effective anti‑oxidation design: Optimized closed absorption and crystallization process, effectively suppress product oxidation, guarantee high purity of finished sodium sulfite and low sodium sulfate impurity.
• High raw‑material utilization rate: Closed‑loop circulation absorption system reduces SO₂ escape and raw material consumption, improves comprehensive yield and cuts long‑term factory operating cost.
• Full‑automatic PLC intelligent control: Real‑time monitoring of reaction temperature, PH value, feeding volume and gas flow rate, minimize manual intervention and support long‑term stable continuous operation.
• Flexible specification adjustment: Process parameters can be adjusted to produce different particle‑size anhydrous sodium sulfite to satisfy various downstream application requirements.
• Environment‑friendly clean production: Equipped with tail gas absorption and waste‑water treatment facilities, low emission, meets global environmental‑protection requirements.
• Reliable anti‑corrosion structure: Core absorption, reaction and crystallization units adopt special anti‑corrosion materials, extending equipment service life and lowering maintenance workload.

Main Applications of Sodium Sulfite (Na₂SO₃)

Sodium sulfite manufactured by our turnkey plant is widely used across multiple industrial sectors:

• Water treatment industry: Used as oxygen scavenger for boiler water and circulating water system, remove dissolved oxygen to prevent pipeline corrosion.
• Paper & pulp industry: Excellent bleaching agent and dechlorinating agent for pulp processing.
• Textile industry: Applied as reducing agent and de‑chlorination agent for textile printing and dyeing process.
• Chemical industry: Reducing agent for chemical synthesis, raw material for producing sodium thiosulfate and other sulfite salts.
• Photographic & leather industry: Used as photographic developer auxiliary and leather tanning reducing agent.
• Other fields: Food‑grade auxiliary raw material, mineral flotation agent and wastewater reduction treatment agent.

Full Turnkey Services We Provide

As a professional EPC contractor for sulfite chemical plants, we deliver one‑stop full‑lifecycle solutions for sodium sulfite factory construction:

• Project feasibility analysis, site evaluation and customized capacity design.
• Process design, PFD & PID flow charts and overall factory layout drawing.
• Complete‑set equipment manufacturing, quality inspection and pre‑factory test.
• Overseas on‑site installation guidance and erection supervision.
• System commissioning and trial run until stable qualified sodium sulfite output.
• Professional operation‑maintenance technical training for local workers.
• Long‑term spare‑parts supply and 24/7 global after‑sales technical support.
• Old plant renovation, process optimization and capacity expansion upgrade service.

Contact us for detailed Na₂SO₃ plant project proposal and latest factory quotation.

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