化工原理實驗恒壓過濾板框壓濾機是一種用于模擬工業化生產的實驗設備，它可以模擬板框壓濾機在實際生產中的運行情況，以下是一些常見的實驗目的：

1. Testing constant pressure filtration constant and specific resistance: In the experiment, the constant pressure filtration constant and specific resistance are calculated by measuring the parameters such as filtration pressure, filtration time and mass of filtrate, so as to understand the performance of filtration media and filtration mechanism.
2. Determination of the compression index of the filter cake under different pressures: By changing the filtration pressure and observing the compression of the filter cake, the compression index of the filter cake under different pressures is determined, so as to understand the structure and nature of the filter cake.
3. Learning the method and operation of washing rate measurement: in the experiment, by measuring the washing rate, to understand the performance of the filter media and washing efficiency during the washing process.
4. Observe the experimental medium flow state in the pipeline: through the experiments to observe the experimental medium flow state in the pipeline, to understand the rules and characteristics of the flow in the pipeline.
5. Measurement of flow rate and pressure drop during filtration: Experimentally measure the flow rate and pressure drop during filtration to understand the performance and filtration effect of the filter.
6. Understanding the structure, operation and maintenance methods of plate and frame filter press: through the experiment to understand the structure, operation and maintenance methods of plate and frame filter press, laying a foundation for the subsequent actual production.