The new booster pump in the hydrochloric acid import pipeline is equipped with a self-start/stop device to control the flow rate
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31% hydrochloric acid is stored in two vertical tanks, each with a capacity of around 15 tons. Normally, it is discharged under static pressure and packaged in buckets of 25 kg each; electronic scales are used for weighing. To ensure safety and accurate measurement, upgrades are desired: an additional booster pump with a DN40 size and a flow rate of around 10–15 m3/h should be installed. Solenoid valves will be used to control the opening and closing of the valves. When the electronic scale indicates that the desired weight has been reached, a signal is sent to the solenoid valve to close it, and another signal is sent to the pump to stop it from operating. It would be more appropriate to make the hydrochloric acid pump fully enclosed or to add additional pipelines for circulation. I would appreciate the opinions of those with experience in this area. Also, I would like to know what type of pump would meet these requirements.
For your situation, you already have a preliminary idea for a renovation proposal that involves using a hydrochloric acid booster pump to control flow and ensure accurate measurement. Here are some suggestions for you: 1. **Selection of the booster pump**: For 31% hydrochloric acid, a pump made of corrosion-resistant materials such as PVDF (polyvinylidene fluoride) or PTFE (polytetrafluoroethylene) should be chosen. The pump model should be determined based on the actual properties of the fluid and the requirements of the system; chemical pumps, centrifugal pumps, or diaphragm pumps can be used. It is recommended to consult a specialized pump manufacturer for specific models. 2. **Fully enclosed circulation system**: For liquids with high corrosivity, a fully enclosed circulation system can provide better protection for operators and the surrounding environment. Therefore, if conditions permit, it is recommended that you use a fully closed-loop system. 3. **Design of the circulation circuit**: If there is concern that the pump may leak due to static pressure when it stops, a safety circuit can be designed to ensure that any excess hydrochloric acid can return to the storage tank through this circuit when the pump stops, thereby maintaining the safety of the system. 4. **Auto-start/stop device**: The auto-start/stop device you suggested is feasible; using the signal from the electronic scale to control the activation and deactivation of solenoid valves and pumps can enable automated metering and filling. 5. **Selection of solenoid valves**: Solenoid valves as well need to be made of corrosion-resistant materials to prevent corrosion by hydrochloric acid. 6. **Pipeline materials**: Corrosion-resistant materials such as PP (polypropylene) and PVC-U (unplasticized polyvinyl chloride) are required for hydrochloric acid transmission lines. 7. **Safety measures**: Throughout the renovation process, don’t forget to implement necessary safety measures such as leak detection and emergency shutdown systems to prevent any potential accidents. It is recommended that you plan the system design in detail before carrying out any modifications, and work together with professional pump manufacturers and valve suppliers to ensure that the material, specifications, and parameters of the equipment chosen meet your actual needs, thereby guaranteeing the long-term stable and safe operation of the entire system. It is also possible to consider entrusting an engineering company with relevant experience to carry out the system design and installation. .
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Thank you very much for your professional advice!