What is the difference between a plate and frame filter press and a box filter press?

What is the difference between a box filter press and a plate and frame filter press? What are the differences in function? What are the advantages of each? Let's now introduce the functions of the comparison between them. This is a lot of concern Here is a systematic summary of the main points.

In general, the functional difference between the box filter press and the plate and frame filter press lies in power and filtration quality. We compare them here on the premise that they have the same effective filtration area. We specifically count out their respective strengths to illustrate their functional differences.

What is a Chamber Filter Press?

The single filter plate of the box filter press is thicker than the plate and frame filter plate, that is, the box filter press is composed of two identical filter plates, and a filter chamber is formed between the two filter plates when pressed. It is used to store the granular objects blocked by the filter cloth. The feeding hole is placed in the center of the filter plate. It is generally used for materials with more granular objects, such as sewage treatment, mineral processing, coal washing and other industries. The bias pressure of each filter chamber is formed, so that the filter plate should not be damaged, the filtration speed is fast, the slag unloading is convenient, the filtration pressure is large, the liquid content of the filter cake is low, and the filter pressure can be as high as 3.0 Mpa, and it is easy to realize the automatic pulling plate unloading. , Adapt to a wider scale, and can make a large filter press.

Let's talk about the advantages of the box filter press first:

1. The price of the box filter press is low, generally about 5,000 yuan lower than that of the plate and frame filter press.

2. The box filter press is stable in performance, hard and wear-resistant, and generally takes a year longer than the plate and frame filter press.

3. The automatic filter press improved from the box filter press is more regular and consistent, and uses the future intelligent advancement.

4. It is more useful to maintain the filter cloth, so that the service life is better and longer, and the automatic cleaning is more convenient. But it is worth mentioning that the replacement of the filter cloth of the box filter press is more urgent and messy.

5. When replacing the filter plate, the standard is the same, and no special arrangement is required.

Let's talk about the plate and frame filter press, what is the plate and frame filter press?

Plate and frame filter press is a kind of filter equipment with intermittent operation of pressure filtration. It is composed of a pressing part, a thrust plate, a pressing plate and a beam to form a frame. It is framed on two equal supporting beams, and there are liquid passages on the corresponding parts of all filter plates and filter frames, which are used to introduce suspension or discharge liquid. All filter plates have sealing surfaces with the same shape as the filter frame. In between, the filter cloth is sandwiched between the plate and the frame sealing surface to become a sealed gasket. Within the filter plate and the frame sealing surface, the filter surface supporting the filter cloth is covered with grooves, and all grooves and discharge filtrate. The channels are connected, and a filter press is composed of many parallel filter chambers. The two sides of each filter chamber have a filter cloth layer that prevents the solid particles in the suspension from passing through and allows the filtrate to penetrate. The total filtration of these filter plates The area represents all the production capacity of the filter press.

The plate and frame filter press is composed of a filter plate and a filter frame, which can withstand a low filtration pressure (generally less than 0.6Mpa). The filter is generally used for the filtration of materials with less granular objects, and is often used for the filtration of fine products. Filter paper can be added to the back of the filter cloth for filtration.

Advantages of plate and frame filter press:

1. The filtration quality of the plate and frame filter press is higher, and the filter cake can be backwashed twice, so that the purity of the filter cake is higher.

2, because compared with the box filter press, the filter space is larger, the filter power is higher, and the number of degrees is faster.

3. It is more convenient and quick to replace the filter cloth, which effectively provides the utilization rate and improves the filtering efficiency.

4. The cycle time is long, the filter plate of the same size, the plate and frame filter press has more space for storing filter cake, and the gap circulation time is also longer. The cycle ratio of the frame filter press is 4:3. This is the major feature of the plate and frame filter press. It is also the reason for its higher price.

5, The weight is lighter than the box filter press, which is easy to transport and move.

In fact, there is no difference between the box-type filter press and the plate-and-frame filter press when the filter requirements of the filter-press are not very high. Both the plate-and-frame filter press and the box-type filter press can realize two types of open flow and undercurrent, and they can be washed according to the filter cake. The method can be divided into: washable type and non-washable type. Washable type refers to the replacement between the washing liquid and the filter cake. After the dispersion process is filtered, the washing liquid can further wash out the desired products and non-products contained in the filter cake. The required waste liquid and filter cake washing methods are clear flow washable, undercurrent washable and suitable for washing type (also known as two-way interspersed washing type). If you choose the non-washable type, you can only filter, not wash.