Ministry of Emergency Management of the People's Republic of China

Regarding the Implementation of Nitro Compound Fertilizer Production Enterprises and the Use of Ammonium Nitrate  

Notice on Special Inspection of Safety Risks in Chemical Enterprises

Emergency Management Departments of Provinces, Autonomous Regions, and Directly-Administered Municipalities (Bureau), the Xinjiang Production and Construction Corps should   Emergency Management Bureau Regarding the safety management departments of central enterprises:

To implement the "Guidance on Further Strengthening the Safety Management of Ammonium Nitrate" jointly issued by five ministries and commissions,   The Notice of Reasoning Strengthen oversight of nitrate-based compound fertilizer manufacturers and chemical enterprises that use ammonium nitrate.   Security risk management In accordance with the national deployment for concentrated efforts to address safety risks associated with hazardous chemicals,    The First Division for Hazardous Chemicals Supervision of the Ministry of Emergency Management has organized the development of the "Guidelines for Nitro-Based Compound Fertilizer Production Enterprises and..."   Key Points for Special Safety Inspections of Chemical Enterprises Using Ammonium Nitrate (Attached hereto). Now being distributed to   You all Please urge and guide the relevant enterprises to conduct thorough self-inspections and make necessary corrections in accordance with the requirements, and establish a system for addressing identified issues.   List of Hazards and Corrective Measures , draw inferences from one instance to comprehensively rectify potential problems and hazards; for those that have not been handled according to...   Enterprises required to conduct self-inspection and self-correction Strictly impose penalties in accordance with laws and regulations. Each provincial emergency management agency...   The relevant departments and the safety management departments of central enterprises shall comprehensively review the enterprises’ self-inspections and self-corrections.   Situation The First Division for Hazardous Chemicals Supervision of the Ministry of Emergency Management will, at an appropriate time, organize spot checks to urge the resolution of hidden issues. The corrective measures have been fully implemented. All units are requested to submit the results of their self-inspections, self-corrections, and follow-up reviews by [date]. August 2022

Moon Submit in writing to the First Division for Hazardous Chemicals Supervision of the Ministry of Emergency Management 15 days in advance (email address: [email address])   whysjchgc@163.com).

Contacts and Phone Numbers :  Huang Yong ,010-64464015.

Department of Hazardous Chemicals Supervision No. 1, Ministry of Emergency Management   July 6, 2022

Copy to report :  Vice Minister Sun Guangyu.

Attachment

Nitrogen-based compound fertilizer manufacturers and those using ammonium nitrate   Key Points for Special Safety Inspections in Chemical Enterprises

I. Key Points for Safety Inspection of the Tower Granulation Process for Nitrogen-Containing Compound Fertilizers

1. During the feeding of production raw materials, are measures such as screening and magnetic separation properly implemented to prevent...

Measures to prevent foreign objects and impurities from entering the system.

2. Pipeline for conveying ammonium nitrate molten solution, using concentrated molten ammonium nitrate as the feedstock   Is a temperature and pressure interlock device properly installed for the accompanying heating steam? , Whether the operating conditions are abnormal   Can promptly close the steam regulating valve. The molten ammonium nitrate-phosphate tank, using ammonium nitrate-phosphate as a raw material, is...   Whether to install temperature monitoring and overtemperature alarm interlock devices. Should we set up overtemperature water addition for cooling?   Emergency handling device.

3. Are non-combustible materials used for the insulation of the melting tank and mixing tank, and are they properly installed?   High-level overflow port or high/low liquid level alarms and ultra-high interlock. Whether to set up emergency discharge   Pending disposal measures Is a steam overtemperature interlock cut-off configured? Is there an upper limit for the steam temperature?   No higher than At 200℃, is the material temperature inside the tank no higher than 185℃?

4. Is a temperature monitoring and overtemperature alarm interlock device installed in the mixing tank? Is it equipped with...

Install an emergency device for adding water to cool down when the temperature exceeds the safe limit.

5. When there is an abnormality in the slurry mixing, should the residence time be strictly controlled? And after stopping the operation, should the material be promptly removed?   Slurry discharge.

6. Are the melting tank and mixing tank regularly cleaned to remove scale buildup?

7. For systems equipped with a nitro slurry concentration section, is a device installed to prevent abnormal pressure in the evaporation chamber? Constantly monitoring the pressure and temperature of common faults.

8. Is the storage area for ammonium nitrate, ammonium nitrate-phosphate raw materials, and nitro-based compound fertilizer products well-ventilated?   The wind is good. Whether it has come into contact with sources of ignition and heat, and whether it is in contact with reducing agents, acids, or active metals.

Store separately from incompatible substances such as powders, flammable materials, and combustibles.

9. Is the mandatory testing regime for the explosion-proof performance of ammonium nitrate compound (mixed) fertilizers strictly enforced?   degree Do enterprises producing ammonium nitrate compound fertilizers with an ammonium nitrate content exceeding 50% undergo inspections every three years? Conduct a comprehensive inspection.

10. Nitrogen-based compound fertilizers contaminated with products such as sweepings and “non-conforming” products, etc.   The chemical feedstock is reused in the evaporation system of the nitro-complex fertilizer plant. ,Whether to return to the system solvent   Chloride ions in the liquid, Analyze and test parameters such as pH value and combustible content, then return the results to the system.   Has the solution been analyzed and found to meet the required standards?

II. Key Points for Identifying Safety Risks in the Storage of Ammonium Nitrate

1. Are the ammonium nitrate solution storage tanks and solid ammonium nitrate warehouses constructed in accordance with the “Regulations on Hazardous Chemicals”?   Risk Baseline for Production Facilities and Storage Installations (GB   36894) and “Hazardous Chemicals”   Method for Determining External Safety Protection Distances for Production Facilities and Storage Facilities GB/T37243)   The medium-quantitative risk assessment method is used to evaluate its external safety protection distance.

2. Have the storage facilities for solid ammonium nitrate and the storage tanks for ammonium nitrate solutions implemented the required perimeter (50m) safety measures?   Flammable and explosive materials must not be stored, and no production facilities involving flammable and explosive materials may be built.   Requirements for installation and storage facilities.

3. Is solid ammonium nitrate stored separately? Is the warehouse regulated in accordance with the “Regulations on Civilian Explosives”?   Engineering Design Safety Standards (GB50089) stipulates that both external and internal safety clearances shall...   Under the condition of meeting the requirements The storage volume in the warehouse should be minimized as much as possible, under any circumstances.   Should not be greater than 500 tons; Is the ammonium nitrate solution tank group arranged separately? What is the maximum capacity of the tank group? Not exceeding the quantity  1000m ² The maximum capacity of a single tank shall not exceed 200 m³. ² .

4. Does solid ammonium nitrate come into contact with flammable substances, combustibles, reducing agents, or strong acids?   Contact with strong bases, nitrites, active metal powders, and incompatible organic substances, etc.   Situation Are there any instances of bulk storage and open-air storage?

5. Has the solid ammonium nitrate warehouse been designed in accordance with the “Code for Fire Protection Design of Buildings (2018)”?   Edition )》(GB   50016) Class A warehouses are required to be designed as single-story, standalone structures, with natural ventilation.   Use a closed structure The fire resistance rating shall be no lower than Grade II, and Class A fire-rated doors and windows shall be installed.

6. Is the solid ammonium nitrate warehouse equipped with mandatory ventilation and far-infrared thermal imaging monitoring?   Security facilities such as alarms, sprinkler cooling systems, and video surveillance , Can the temperature monitoring system?   Effectively monitor temperature changes on the surface of ammonium nitrate stacks. ; Outside the solid ammonium nitrate warehouse   Whether to set up safety features such as flame video recognition alarms , regarding monitoring, alarms, and video   Monitor signals are connected to the risk monitoring and early warning system for safe production of hazardous chemicals. ;Solid nitrate   Are fire water systems installed in the ammonium sulfate warehouse and the loading and unloading area? , whether equipped with appropriate portability   Fire extinguisher.

7. Is the storage temperature in the solid ammonium nitrate warehouse set to no higher than 30℃, and the humidity?   More than 75%—When the temperature exceeds the threshold, forced ventilation or outdoor spray cooling systems should be activated in stages.

8. The storage and management of solid ammonium nitrate shall comply with the "General Rules for the Storage of Commonly Used Hazardous Chemicals."

(GB15603), Technical Requirements for Storage and Maintenance of Flammable and Explosive Goods (GB17914)   Waiting requirements Moreover, the stacking width should not exceed 6 m, and the stacking length should not exceed 15 m; the stack...   No greater than the height 2.2 m; the space between stacks and between stacks and walls shall be no less than 0.9 m; stack   The top of the stack must be at least a certain distance from the warehouse roof or load-bearing beams. 0.9m.

9. Is the hot work in the solid ammonium nitrate storage warehouse carried out only after it has been completely emptied? Is it?   Strictly implement the "Safety Specifications for Special Operations in Enterprises Handling Hazardous Chemicals." (GB   30871) To want   Seek. 10. Is the storage temperature of the ammonium nitrate solution being maintained at no more than 145℃, and what is its concentration?   Should not exceed 93% (quality), and regularly test pH, concentration, organic matter content, and other parameters.   Storage requirements for parameters.