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Three minutes to understand the filtration process of blade filter
11-05-2018
Author: Shanghai Shuangqi fluid separation technology Co., Ltd
Click: 3358

The filtering speed of the blade filter should be appropriate, which will not cause too much impact on the filter, but also meet the discharge requirements and efficiency requirements. Generally speaking, the filter element is easy to be damaged, so it is necessary to find a suitable filter screen. Simple and easy filtering process should be as simple as possible. If it can be done in one step, it should not be divided into two steps. The removal and cleaning of filter element shall be convenient so as to improve efficiency. As for the operation, it is still very simple. The steps of various filters are the same. First, discharge the material, then start the press, discharge the material, and then clean the filter element. In the process of discharging, pay attention to the discharging situation at all times. If the filter element is abnormal, it can be handled in time, especially when it is unfamiliar in the early stage.


The blade filter uses gear oil pump or centrifugal pump to pump the white soil mixed liquid mixed by decolorizing pot or mixing tank into the white soil decolorizing filter tank through pipeline and fill it. Under the thrust of the pump, the large particles of white soil are first intercepted on the surface of the filter screen to form a filter cake layer. Under the function of the filter cake layer, the fine particles of white soil are intercepted to form countless The fine channel then intercepts the more fine suspended matter and only allows the clear liquid to pass through. At this time, the filtration starts. In the process of filtration, new clay mixture is pumped in to form a new filter cake layer, so that the filter cake is not blocked. In this way, the material is substantially filtered through the filter cake layer, and the clear liquid flows through the internal channel of the screen to the oil outlet pipe through the oil outlet nozzle, Under the thrust of the pump, it flows to the finished product tank through the pipeline.


What are the advantages of the blade filter compared with the plate filter?

Advantages of blade filter:

1. No need of filter cloth and paper, greatly reducing the cost of filtration.

2. Fully enclosed operation, environmental protection, no material loss.

3. Vibration slagging greatly reduces labor intensity and realizes continuous operation.

4. Pneumatic valve slagging, greatly reducing the labor intensity of workers.

5. The residue or activated carbon (clay) in the liquid can be filtered or dehydrated, which can completely replace the plate and frame filter, and is the preferred equipment in the filtration industry.


Blade filter is mainly used for solid-liquid separation, is a precision filtering equipment. The filter plate can be composed of stainless steel mesh, stainless steel punching mesh and stainless steel electric welding mesh, without consumption of filter paper, filter cloth and filter element. Specifically, stainless steel mesh is acid and alkali resistant and corrosion-resistant. It can be washed with clean water without rusting, and can be reused after drying. The longer service life brings greater economic benefits to customers. A kind of intermittent filtration is adopted. Therefore, when the filter residue accumulates to a certain extent, there must be a complete cleaning step. In order to make the filtration operation continuous, the main machine of blade filter must be equipped with two sets. In the filtration process, the filter cake should not be overfilled. Only when the filter cake of two adjacent filter plates is kept in a space of about 2cm, the filter cake can be dried and easily removed. In addition, when the filtration reaches the allowable filtration pressure of *, slag removal shall be started. It depends on the filter blade to intercept the clay and form the filter cake to filter the materials. Therefore, the selection of the blade filter depends on the amount of residue to be discharged for each filtration as the main parameter, followed by the output you require. And the fluidity of materials, three parameters are clear to choose the filtering area of the blade filter.


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