In industrial production, plate and frame filter press is a commonly used solid-liquid separation equipment, which is widely used in various industries. Among them, the washing of the filter cake is one of the important links of the plate and frame filter press, which can effectively remove impurities and harmful substances in the filter cake and improve the quality and yield of the product. This article will introduce several ways to wash the filter cake of the plate and frame filter press.
1. Soak and wash.
Immersion washing is a common filter cake washing method, which removes impurities from the filter cake by passing the washing water through the filter cloth. During operation, the filter cloth of the plate and frame filter press is removed, and the washing water is poured into the filter cloth, so that it flows down under the action of gravity, taking away the impurities in the filter cake. In order to improve the washing effect, you can add an appropriate amount of detergent or other chemicals to the washing water.
2. Countercurrent washing.
Countercurrent washing is a more advanced filter cake washing method, which removes impurities in the filter cake by allowing the washing water to flow upstream from the other side of the filter cake and forming a relative flow with the filter cake. During operation, the filter cloth of the plate and frame filter press is removed, and the washing water is allowed to enter from one side and flow out from the other side, forming a counterflow. Under the action of countercurrent, the washing water can fully flush the filter cake and thus remove impurities.
3. Spray washing.
Spray washing is an efficient filter cake washing method, which is to remove impurities by spraying washing water on the filter cake in a high-pressure spray manner. During operation, the filter cloth of the plate and frame filter press is removed and the washing water is sprayed on the filter cake using a high-pressure nozzle. Due to the large impact of the spray, it can wash out the impurities in the filter cake and improve the washing effect.
Fourth, vibration washing.
Vibration washing is an innovative filter cake washing method, which makes the filter cake loose by vibrating, thereby increasing its surface area and porosity, and improving the washing effect. During operation, the filter cloth of the plate and frame filter press is removed and the filter cake is vibrated using a vibrating device. Under the action of vibration, the particles of the filter cake become more loose, increasing their surface area and porosity. This allows the wash water to penetrate better into the filter cake, allowing for more efficient removal of impurities.
To sum up, soaking washing, countercurrent washing, spray washing and vibration washing are several common ways to wash the filter cake of the plate and frame filter press. In practical application, the appropriate washing method should be selected according to the actual situation. At the same time, in order to improve the washing effect, it can also be washed in a combination of ways.