As a key equipment in modern production processes, automatic dosing devices are widely used in fields such as sewage treatment and industrial circulating water systems. Their precise and efficient operation directly affects process efficiency and production costs. The core usage details are described in detail from four dimensions: pre use preparation, operation management, maintenance, and safety regulations.
1、 Preparation before use: Basic verification and parameter setting
Before activation, a comprehensive inspection must be completed to confirm that the power supply circuit is not damaged and the grounding is reliable; The drug storage tank has sufficient stock of drugs, and the solution concentration meets the process requirements (such as the flocculant needs to be diluted proportionally); The inlet and outlet pipelines of the metering pump are unobstructed, and the valve opening and closing status is correct; The controller parameters have been pre-set, including dosage (mL/min), working cycle (during intermittent operation), and alarm threshold. Special attention should be paid to drug compatibility - if changing the drug type, the storage tank and pipeline must be cleaned to avoid cross contamination or chemical reaction risks.
2、 Operation management: dynamic monitoring and adjustment optimization
After startup, three key indicators should be monitored in real time: ① Flow stability: By observing the reading of the flow meter, it is determined whether the metering pump is outputting normally. If the fluctuation exceeds ± 5%, it is necessary to check the wear of the pump head seal or pipeline blockage; ② Liquid level linkage: When the low-level float switch triggers the replenishment signal, the mother liquor should be replenished in a timely manner to prevent damage to the pump body caused by idling; ③ Water quality feedback: Combining online monitoring instruments (such as residual chlorine detectors and pH meters) data, reverse validate the dosing effect, and adjust dosage parameters if necessary. For multiple devices operating in parallel, it is necessary to synchronously calibrate the operating frequencies of each pump to ensure a uniform distribution of the total dosage.
3、 Maintenance: Periodic maintenance ensures a long service life
The focus of daily maintenance is on preventive maintenance: clean the breather valve filter of the medicine storage tank daily to prevent the inhalation of impurities; Manually test the flexibility of the stroke adjustment mechanism every week to avoid measurement deviation caused by mechanical jamming; Disassemble and clean the one-way valve of the metering pump every month to remove any residual crystals or particles. Before long-term shutdown, rinse the entire flow path with clean water, drain residual chemicals, and apply rust proof grease to metal parts. It is recommended to replace vulnerable parts such as diaphragms and seals according to the manufacturer's specified cycle, with a typical lifespan of 6-12 months.
4、 Safety regulations: Risk prevention and control throughout the entire process
Operators must wear protective equipment (goggles, acid and alkali resistant gloves), and it is strictly prohibited to disassemble high-pressure hoses without pressure relief. When preparing chemical agents, MSDS guidance should be followed to control the dissolution temperature and stirring speed, avoiding dust flying or intense heat release. Emergency eye wash stations and neutralization tanks should be equipped in the equipment room, and any leaked chemicals should be immediately collected using absorbent materials. Direct discharge into the sewer is prohibited. The control system needs to be equipped with dual insurance - except for automatic start stop, the manual emergency stop button should be retained to cope with sudden power outages or overload conditions.
The efficient operation of automatic dosing devices relies on rigorous operating procedures, continuous status monitoring, and scientific maintenance strategies. By refining the above steps, the precision of drug addition can be significantly improved, energy consumption and accident risks can be reduced, and the safety and controllability of the production process can be achieved.