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Case Introduction - Shanxi Dongjin Fertilizer Co., Ltd. – Disc Continuous Dryers for Sodium Nitrate & Sodium Nitrite Production
The disc continuous dryer for sodium nitrate (NaNO₃) and sodium nitrite (NaNO₂) drying achieves product moisture content ≤0.1% with steam consumption as low as 0.04 tons per ton of product—saving 80% energy compared to traditional air-flow drying (0.12 t/t). Unlike conventional methods that typically achieve only ≤0.2% moisture, this industrial conduction dryer uses hollow heating discs to conduct heat directly, spreading and rolling material evenly for efficient evaporation. Designed for 60kt/a sodium nitrate and 40kt/a sodium nitrite molten salt grade production lines, the system features continuous operation, 150+ days runtime before first maintenance, fully automated PLC control with 1 operator per shift, and strong adaptability to powder and granular materials. Ideal for chemical and inorganic salt industries requiring high drying efficiency and product purity.
Case Introduction template
Basic Project Information
Project Name: _ Shanxi Dongjin Fertilizer Co., LTD. __ (
Customer industry: _ Inorganic salt production ___
Customer requirements: Drying equipment for a 60kt/a sodium nitrate and 40kt/a sodium nitrite production line, with the product sodium nitrate and sodium nitrite content ≤0.1%
Equipment selection: 2 disc continuous dryers (e.g., forced circulation MVR evaporators, 2t/h evaporation capacity)
Project cycle: ____2.5 months ______ commissioning time: _october 2024 _________
Background and pain points
Project Background: ____ New production lines of 60kt/a molten salt grade sodium nitrate and 40kt/a molten salt grade sodium nitrite ______
Customer pain point: ___ The traditional drying of sodium nitrate and sodium nitrite is usually air-flow drying, with steam consumption of approximately 0.12 tons per ton of product, and it is difficult to achieve a moisture content of ≤0.1%, generally only ≤0.2%_______
Equipment configuration and technical solutions
Equipment configuration: _ Disc continuous dryer provided by our company _ Main components: 2 disc dryers, 2 quantitative feeders, 2 induced draft fans, 2 windproof dischargers, 1 set of automatic control system and auxiliary equipment, equipment material: 304 stainless steel ________ (brief description of main equipment, auxiliary equipment and materials)
Principle of operation: ___ Disc dryer is a highly efficient continuous conduction type drying equipment. The core principle is to conduct heat through the hollow heating disc, causing the material to spread and roll evenly on the disc surface to achieve water evaporation. It has the advantages of high drying efficiency, low energy consumption, and strong adaptability to materials. It can handle various forms of materials such as powder, granules, paste, etc. It is widely used in various industries for drying, dehydrating and purifying materials, especially in large-scale production scenarios with high requirements for drying temperature and product purity. The steam consumption of the disc dryer is 1.3t/t of water, which is 1/5 of that of the air flow dryer.
Customized adjustment: ___ select a different model of disc continuous dryer for each of the two products, 60kt/a sodium nitrate and 40kt/a/ sodium nitrite, as required by this customer, _______ (targeted solution to the customer 's pain point)
Operation effect
Treatment effect: The water content of both products met the requirement of ≤0.1%, and the output also met the design indicators ________ (e.g., the purity of crystalline salt ≥97.5%, wastewater discharged up to standard)
Energy consumption performance: Steam consumption ~0.04t/t product _______ (example: saves 60% energy compared with traditional equipment, saves 800 yuan in electricity bill per day)
Operational stability: The disc continuous dryer runs continuously for _150 days from commissioning completion to the first maintenance, with 1 person on duty in the central control room per shift, ________ (example: continuous operation for 300 days without failure, 1-2 people on duty)
Customer benefits: __________ (quantitative + qualitative description, example: energy cost savings of 500,000 yuan per year)
Project Summary
__________ (summarize project highlights, equipment compatibility, and customer benefits)