CN211158839U - Belt type filter press - Google Patents

Abstract

The utility model discloses a belt filter press, which relates to the technical field of filter presses. The inside of the frame is provided with rollers with diameters from large to small, upper and lower filter belts are interspersed between the rollers, and the filter belts are arranged in a ring. The filter belt is connected to the output end of the speed regulating motor in a driving connection. A filter belt adjusting device for adjusting the tension of the filter belt is fixedly installed on the frame. A filter belt cleaning device is arranged on the frame and above the filter belt. This belt filter press separates the mud and water by the mutual extrusion between the drums. Adjustable scraper, the preload of the scraper is adjusted by the spring. In the normal process of pressure filtration of the soil, the sundries on the drum are removed by the rotation of the filter belt, so as to achieve the function of cleaning, without manual cleaning, the cleaning process is simple and convenient, and the cleaning is performed at the same time, saving time.

Description

A belt filter press

technical field

The utility model relates to the technical field of filter presses, in particular to a belt filter press.

Background technique

The working principle of the traditional belt filter press is that after the concentrated sludge is fully mixed with a certain concentration of flocculant in a static and dynamic mixer, the tiny solid particles in the sludge are aggregated into larger flocculent clusters. At the same time, the free water is separated, and the flocculated sludge is transported to the filter belt for concentrating gravity dewatering. Between the belts, through the wedge-shaped pre-compression zone, the low-pressure zone and the high-pressure zone, the sludge is gradually squeezed under the action of the extrusion force and shear force from small to large, so as to achieve maximum separation of mud and water, and finally form a filter cake discharge. Due to the improper operation and use of the belt filter press, it is easy to cause the filter belt to be cleaned and the impurities on the filter belt remain too much, which reduces the re-filtration efficiency of the filter belt. The incompletely cleaned filter belt will be seriously blocked and affect sewage treatment. use of equipment.

Utility model content

In view of the deficiencies of the prior art, the utility model provides a belt filter press, which can solve the problem of incomplete cleaning during the use of the existing belt filter press.

In order to achieve the above purpose, the utility model is realized through the following technical solutions: a belt filter press, which mainly consists of a driving device, a frame, a press roll, an upper filter belt, a lower filter belt, a filter belt tensioning device, a filter belt Cleaning equipment, etc.

Among them, rollers with diameters from large to small are arranged inside the frame, upper and lower filter belts are interspersed between the rollers, the filter belts are installed in a ring, and a speed regulating motor is fixedly installed on the top of the frame. The filter belt is connected to the output end of the speed-regulating motor in a driving connection. A filter belt adjusting device for adjusting the tension of the filter belt is fixedly installed on the frame. The frame is also provided with a gravity dewatering device and a wedge-shaped area dewatering device. A filter belt cleaning device is arranged on the frame and located above the filter belt, and a scraper in contact with the filter belt is fixedly installed inside the frame.

Preferably, the gravity dewatering device is mainly composed of a gravity zone bracket and a material trough.

Preferably, there are two filter belt cleaning devices respectively arranged above and below the inner cavity of the frame.

Preferably, a spring is arranged between the scraper and the frame.

The utility model provides a belt filter press. Has the following beneficial effects:

(1) This belt filter press separates the mud and water by the mutual extrusion between the drums. Adjustable scraper, the preload of the scraper is adjusted by the spring. In the normal process of pressure filtration of soil, the sundries on the drum are removed by the rotation of the filter belt, so as to achieve the function of cleaning, without manual cleaning, the cleaning process is simple and convenient, and the cleaning is performed at the same time, saving time.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

In the picture: 1 frame, 2 rollers, 3 filter belts, 4 gravity dewatering devices, 5 wedge-shaped area dehydration devices, 6 speed regulating motors, 7 filter belt adjustment devices, 8 filter belt cleaning devices, 9 scrapers, 10 springs .

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example.

Examples of such embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present invention, but should not be construed as a limitation of the present invention.

Please refer to FIG. 1, the utility model provides a technical solution: a belt filter press, including a frame 1, and the inside of the frame 1 is provided with rollers 2 arranged in order of diameter from large to small. There are upper and lower filter belts 3 interspersed between 2, and the filter belts 3 are arranged in a ring. The top of the frame 1 is fixedly installed with a speed regulating motor 6, and the filter belt 3 is connected with the output end of the speed regulating motor 6 in a driving connection. A filter belt adjusting device 7 for adjusting the tension of the filter belt 3 is fixedly installed on the frame 1, and a gravity dewatering device 4 and a wedge-shaped area dewatering device 5 are also arranged on the frame 1. A filter belt cleaning device 8 is arranged above the filter belt 3 , and two filter belt cleaning devices 8 are respectively arranged above and below the inner cavity of the frame 1 . The inside of the frame 1 is fixedly installed with a scraper 9 in contact with the filter belt 3 . A spring 10 is provided between the scraper 9 and the frame 1 .

Among them: the frame 1 is mainly used to support and fix the press roll system and other components.

The inside of the frame 1 is provided with rollers 2 arranged in order of diameter from large to small. When the sludge is clamped by the upper and lower filter belts and passes through the press rollers in turn, a pressure gradient from small to large is formed under the action of the tension of the filter belt, so that the pressing force of the sludge during the dewatering process is continuously increased, and the sludge The water is gradually removed.

The gravity dewatering device 4 is mainly composed of a gravity zone bracket 41 and a material trough 42 . The flocculated material loses a lot of water in the gravity zone, and the fluidity becomes poor, creating conditions for subsequent extrusion dehydration.

The wedge-shaped area dehydration device 5 is formed by the upper and lower filter belts to apply a squeezing force to the clamped material to perform pre-pressure dehydration to meet the requirements of the pressing and dehydrating section on the liquid content and fluidity of the material.

The filter belt 3 is the main component of the belt press filter. In the separation process of the solid phase and the liquid phase of the sludge, the upper and lower filter belts are the filter media, which bypass the press roll under the tension of the upper and lower filter belts. To obtain the pressing force required to remove the moisture of the material.

The filter belt cleaning device 8 is composed of a sprayer, a cleaning water contact box and a cleaning cover. When the filter belt travels, it continuously passes through the cleaning device and is impacted by the pressure water sprayed by the sprayer. The material remaining on the filter belt is separated from the filter belt under the action of the pressure water, so that the filter belt is regenerated and prepared for the next dehydration process. Prepare.

The filter belt adjustment device 7 is composed of a cylinder, a tensioner and a synchronizing mechanism. Its function is to tension the filter belt and provide the necessary tension conditions for the production of the pressing force of the pressing and dehydration. The adjustment of the tension can be adjusted by adjusting the air pressure system. The air pressure of the tension cylinder is realized.

The dehydration process of the belt press filter can be divided into four important stages: pretreatment, gravity dehydration, pre-pressing dehydration in wedge-shaped area and pressing dehydration.

1. In the pretreatment stage, the solid content of the original slurry is generally very low, and the slurry concentration must be increased by gravity sedimentation or other methods to reduce the treatment cost. The commonly used pretreatment method is: mixing the concentrated sludge with a polymer flocculant, under the action of the flocculant, the fine particles aggregate into a mass and preliminarily settle, which is the preparatory condition for the dewatering of the sludge on the machine.

2. In the gravity dewatering stage, the sludge after flocculation pretreatment is added to the filter belt. Under the action of gravity, the free water outside the flocculation will be filtered out through the filter belt, reducing the water content of the sludge.

3. In the wedge-shaped pre-pressing dehydration stage, the sludge begins to enter the wedge-shaped pressing section after gravity dehydration, the gap between the filter belts gradually shrinks, and the sludge begins to be squeezed and sheared to dehydrate the sludge again. After this stage, the fluidity of the sludge is almost completely lost, thus ensuring that the sludge will not be squeezed out in the pressing and dewatering section under normal circumstances.

4. In the pressing and dewatering stage, the sludge is repeatedly squeezed and sheared by a well-designed press roller system to remove a large amount of capillary water, so that the sludge moisture is gradually reduced, forming a sludge filter cake, which is separated in the re-selection filter belt. At this point, the filter cake is scraped off by the discharge scraper, and after discharge, the filter cloth is cleaned and entered into the next cycle.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (4)

1. A belt filter press, comprising a frame (1), characterized in that: the inside of frame (1) is provided with roller (2) that the diameter was arranged by big-end to little order, and it has upper and lower filter belt (3) to alternate between roller (2), filter belt (3) are the ring dress, the top fixed mounting of frame (1) has buncher (6), filter belt (3) are connected with the output transmission of buncher (6), fixed mounting has filter belt adjusting device (7) of adjusting filter belt (3) tension size on frame (1), still be provided with gravity dewatering device (4) and wedge district dewatering device (5) on frame (1), the top that is located filter belt (3) on frame (1) is provided with filter belt cleaning device (8), the inside fixed mounting of frame (1) has scraper blade (9) with filter belt (3) contact.

2. The belt filter press of claim 1, wherein: the gravity dewatering device (4) mainly comprises a gravity area bracket (41) and a trough (42).

3. The belt filter press of claim 1, wherein: the filter belt cleaning device (8) is provided with two filter belts which are respectively arranged above and below the inner cavity of the frame (1).

4. The belt filter press of claim 1, wherein: and a spring (10) is arranged between the scraper (9) and the frame (1).

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