How should the initial commissioning of a newly built batch-series acid mixing nitration plant for producing *** be carried out?

The system recycles waste acid; pure water is added to the washing system, the pumps are installed and started up, materials are added according to the dosage ratios specified by the design institute, and the reaction temperature is carefully controlled. Adjust the feeding ratio in a timely manner based on the results of the central control analysis.

1. Acid cleaning operation: Using acid to scrub equipment and related pipelines in order to remove acid-soluble impurities. 2. Acid preparation operation: Preparing acid without generating waste acid (during initial startup). 3. Quality requirements and process conditions for intermediate products. 4. Starting up the production process by feeding materials in

Could you be more detailed? I’m a beginner starting out!

***Has the water-linked commissioning been carried out? The plant can only be started after this has been done and any issues have been resolved. Before starting up, verify that: 1. Utility systems such as water, electricity, steam, and gas are operating properly. 2. The individual testing of the transmission equipment was successful, and it operates normally. 3. The equipment pipelines and valves have been pressure-tested and leak-tested completed. 4. The raw materials used in production – benzene, nitric acid, sulfuric acid, and liquid alkali – have all arrived at their respective locations, and sufficient quantities of materials for the trial run are available as required. 5. The operators have completed training and obtained their work permits. Steps for chemical plant commissioning: 1. If there is no waste acid, 98% acid purchased from outside must be used to prepare it; if waste acid is available, it can be added directly to the system. 2. First, add waste acid to the nitration system (fill several nitration reactors, nitration separators, extraction reactors, extraction separators, and the waste acid sump to the point of overflow; fill the intermediate waste acid tank to 50%) in order to establish a waste acid circulation cycle. Check whether the agitators in each reactor are functioning properly, inspect the system for any leaks, and confirm their absence. 3. Fill the neutralization tank, neutralization separator, washing tank, and washing separator with soft water, as well as the soft water sump. 4. Prepare the alkali for use. 6. Start the naphthalene pump to add naphthalene to the extraction tank for extraction purposes, in order to prepare acidic benzene for use. 7. Start the pumps for sulfuric acid, nitric acid, and acidic benzene to begin feeding the materials, and adjust the ratio of sulfuric acid, nitric acid, acidic benzene, and waste acid – this is crucial. The initial feeding rate should be 10-20% lower. 6. Control the reaction temperature in the nitration tank properly, following the established procedures. 7. Adjust the feeding ratio based on the results of central control analysis; analysis should be carried out once per hour. 8. Strengthen inspections; when the nitration separator discharges material, adjust the pH value of the neutralization tank accordingly. 9. When the neutralization separator discharges material, adjust the water volume used in the washing tank. 10. Strictly adhere to the process parameters and follow the established procedures to ensure safe operation. This is a brief summary – I hope it’s useful to you.

I’ve learned about it............

It’s worth knowing; I’ll be working in this field from now on