The production process for manufacturing phosphorus pentoxide from yellow phosphorus, as well as the hazardous factors present in this process?
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The production process for manufacturing phosphorus pentoxide from yellow phosphorus, as well as the hazardous factors present in this process? The yellow phosphorus raw material is transported to the factory’s raw material warehouse, where it is lifted into the phosphorus melting tank using an electric crane. There, it is heated and melted before being sent to the refined phosphorus reactor for further purification. After that, it is transferred to the phosphorus compression tank; after adjustment and metering, it is sent to the nozzle of the phosphorus combustion furnace, where it burns fully together with purified and dried air. The resulting phosphorus pentoxide settles at the bottom of the reactor through natural cooling, and then it is conveyed to a sedimentation chamber using a closed spiral conveyor. There, it is weighed by a packaging machine and then packaged before being stored in inventory. The exhaust gas discharged from the reactor is cooled and settled in six-stage cooling and settling chambers to recover phosphorus pentoxide, after which it is directly released into the atmosphere through pipelines. The aforementioned process is relatively simple; there are no parameters related to temperature or pressure in it. Does anyone who is familiar with this process could provide some information? The main equipment is as follows:Serial No. Name Specifications Quantity Remarks
1 Burning furnace φ1500X7000 20 Q235A
2 Closed conveyor φ400X8800, N=4KW 4 sets
3 Elevating screw conveyor φ400X8800, N=3KW 4 sets
4 Packing screw conveyor φ150X500, N=1.1KW 4 sets
5 Phosphorus melting tank 1500X1500X2500 1 3046
6 Phosphorus supply tank 500X500X500 4 316L7
7 Product recovery chamber φ1500X5200 4 Q235A
8 Sedimentation recovery chamber φ1500X4500 8 Q235A
9 High-level water tank 2000X2000X2500 1 Q235A
10 Phosphorus melting water collection tank 1000X1000X1500 1 Q235A
11 Water distribution tank 500X500X800 1 Q235A
14 Hot water boiler 0.2t/h 1 Q235A
15 Water pump Q=15m3/h, N=1.5KW 1 set
16 Pipeline pump Q=37L/s, N=0.25KW 1 set
17 Electric hoist N=1.5KW 1 set
18 Scale 0-50Kg 1 set
19 Sulfuric acid storage tank φ1800X2000, V=12m3 1 Q235A
20 Sulfuric acid discharge and feeding tank 1500X2500X1500 1 Q235A
21 Sulfuric acid discharge and feeding pump Q=14.4m3/h, N=4KW 1 set
22 Blower Q=20m3/min, N=0.75KW 2 sets
23 Air drying tower φ1300X4000 8 RPP
Could someone with expertise help me analyze the hazardous factors in this process?
There are many hazardous factors, the most significant of which is burn accidents caused by direct human contact with yellow phosphorus. List the following accident cases: 1) The pipeline for transporting liquid yellow phosphorus became blocked; the staff heated it and then used a lever to open the valve, which caused the valve stem to break, resulting in yellow phosphorus splashing out and the staff suffering severe burns. 2) The foundation of the phosphorus purification tank was not stable (the tank was placed on an elevated foundation to facilitate transportation); it shifted, resulting in the leakage of yellow phosphorus, which caused intense smoke when it burned. This led to discomfort among students at a school located 2 km away, triggering a public safety incident. This post was last edited by tangqing on 2009-2-10 16:25.]
Phosphorus pentoxide reacts with water to form orthophosphoric acid; when it comes into contact with humid air, it produces acid rain that pollutes the environment. Inhalation by humans and animals can cause respiratory discomfort. This post was last edited by Canghai Yili Sha on 2009-2-11 05:31.]
Hazard analysis should not be limited to a comprehensive assessment of the materials alone; it must also take into account the manufacturing process.
How can your device use carbon steel? Don’t understand