Sodium cyanide single-effect evaporator

Sodium cyanide is a highly toxic chemical, and the treatment of cyanide-containing wastewater generated during its production and use is a top priority in environmental protection. Improper treatment can not only cause serious environmental pollution but also endanger human lives. Our sodium cyanide single-effect evaporator adopts a fully enclosed design and multiple safety protection measures, providing the safest and most reliable evaporation and concentration solution for cyanide-containing wastewater treatment.

I. Safety Design Concept of Sodium Cyanide Single-Effect Evaporator

Safety is the primary consideration in the treatment of sodium cyanide wastewater. Our equipment prioritizes safety from the very beginning of its design:

1. Fully Enclosed Negative Pressure Operating System

The entire evaporation system operates under negative pressure conditions. All links that may generate hydrogen cyanide gas are in a closed state, eliminating the risk of toxic gas leakage. The system is equipped with a complete exhaust gas absorption device to ensure absolute safety.

2. Strict Material Selection

Sodium cyanide solution is highly corrosive and may produce hydrogen cyanide gas. Parts of the equipment that come into contact with the material use special corrosion-resistant materials, such as titanium and Hastelloy, to ensure long-term stable operation of the equipment under harsh conditions.

3. Automated Control

The system adopts fully automated control, eliminating the need for direct contact with materials. All operations can be completed through the central control room, maximizing personnel safety.

II. Technical Features and Processes of Sodium Cyanide Single-Effect Evaporator

1. Forced Circulation Evaporation Process: Utilizing a forced circulation design, a circulation pump ensures high-speed circulation of cyanide-containing wastewater within the system, preventing prolonged material residence time and subsequent decomposition or sedimentation. High heat transfer efficiency and rapid evaporation effectively shorten the treatment cycle.

2. Multi-Level Safety Protection

Automatic negative pressure maintenance system ensures the system remains under negative pressure at all times.

Online exhaust gas monitoring automatically alarms and initiates emergency procedures if standards are exceeded.

Emergency shutdown system automatically cuts off feed and initiates safety procedures in abnormal situations.

Overpressure protection prevents equipment damage and material leakage.

3. High-Efficiency Cyanide Degradation Pretreatment

For high-concentration cyanide-containing wastewater, a chemical cyanide degradation pretreatment system is installed before evaporation. Through alkaline chlorination or other mature processes, cyanide is converted into low-toxicity or non-toxic substances, reducing the risks associated with subsequent evaporation treatment.

4. Application Areas

Electroplating Industry: Treatment of cyanide-containing electroplating wastewater

Gold Smelting: Treatment of cyanide gold extraction wastewater

Chemical Production: Concentration treatment of sodium cyanide production wastewater

Heat Treatment Industry: Treatment of cyanide bath wastewater

5. Environmental Compliance and Economic Benefits

With increasingly stringent environmental regulations, the treatment of cyanide-containing wastewater has become a rigid requirement for relevant enterprises. Our sodium cyanide single-effect evaporator helps enterprises:

Achieve Discharge Standards: Treated wastewater meets the most stringent discharge standards

Recover Resources: Recover valuable sodium cyanide or other substances

Reduce Disposal Costs: Reduce the amount of hazardous waste transported and lower disposal costs

Eliminate Safety Hazards: Completely solve the storage and transportation risks of cyanide-containing wastewater

Although the equipment investment is relatively high, considering the savings in hazardous waste disposal costs, the elimination of safety risks, and the guarantee of environmental compliance, the overall economic benefits are very significant.