CN102600656A - Novel high-performance belt pressure filter - Google Patents

Abstract

The invention relates to a novel high-efficiency belt filter press. In the filter press area, the main pressure rollers are arranged in a spiral ascending order from low to high in the vertical direction of the horizontal plane. There are two adjacent main pressure rollers, and the horizontal position of the top of the former roller is higher than or equal to that of the latter roller. The bottom horizontal position; the upper filter belt and the lower filter belt overlap and entrain the filter material to enter the filter press area from the main pressure roller at the lowest position; the upper filter belt and the lower filter belt enter each main pressure roller in the filter press area from the Its lower part winds in and its upper part leaves. Through the reasonable arrangement of the pressure rollers, all the water squeezed out of the material during the filter press process can automatically fall into the water receiving tank under the rollers, preventing it from flowing back into the squeezed or to-be-squeezed materials, thereby Greatly improve the dehydration efficiency of the belt filter press.

Description

A new high-efficiency belt filter press

technical field

The invention relates to a belt filter press in the field of dehydration equipment, in particular to a novel high-efficiency belt filter press. the

Background technique

In industrial and agricultural production such as metallurgy, chemical industry, papermaking, tanning, alcohol sewage treatment, poultry and livestock breeding, and urban catering waste, it is often necessary to separate solid-liquid from associated waste liquid and waste residue, and the lower the moisture content of the waste residue after separation , the treatment of waste residue is also easier, and the comprehensive treatment cost will be lower. Therefore, in various dehydration equipment, due to its continuous and uninterrupted production, simple operation, low operation and maintenance costs, and relatively high solid-liquid separation efficiency, etc. At present, belt filter presses are widely used in the production practice of the above-mentioned industries at home and abroad. But generally speaking, the efficiency of the solid-liquid separation of the existing belt filter press needs to be further improved, and the water content of the separated waste residue is still far from the requirements of the subsequent treatment process, which can no longer adapt to the full utilization of resources and the requirements of social development. Increasing demands for environmental protection. the

The dehydration effect of the existing belt filter press is not ideal, mainly due to the following reasons:

1. The installation layout of the pressure roller is not scientific and reasonable enough. Due to the unreasonable layout of the pressure roller and the limitation of the direction and space of the filter belt, the water squeezed out of the material cannot be automatically separated from the roller and the filter belt when the belt filter press is running, and the water can be separated by installing the water receiving tray. The water is fully collected and drained in the same way, but a considerable part of it flows back or drops into the extruded or to-be-extruded material, so a part of the water extruded by each pressure roller becomes invalid dehydration, thus It seriously affects the dehydration efficiency of the belt filter press, resulting in unsatisfactory dehydration effect. the

2. The direction in which the filter belt entrains the filter material into the pressure roller is unreasonable. Most of the material entrained in the filter belt of the existing belt filter press enters from the upper part of the pressure roller and exits from the lower part. Such a setting will lead to a significant reduction in the water squeezed out by the pressure roller and a significant reduction in separation efficiency. Because when this is set up, the area where the material receives the greatest pressure on the pressure roller is the middle and upper part of the pressure roller, and the water that is squeezed out here is also the most, but this part of the water that is squeezed out cannot be separated from the material. The flow direction of the material is consistent with the running direction of the pressure roller and the filter belt, and will flow along the surface of the filter belt to the bottom of the roller. However, when it flows to the middle and lower part of the pressure roller, the pressure on the material has gradually decreased, and a considerable part of it has After being absorbed by the material, the part that has not been absorbed will fall from the pressure roller to achieve separation. the

3. There are defects in the drive system, and the operation stability and reliability are not high. The driving process adopted by the existing belt filter press is basically the way that the driving device passes through the chain transmission, and simultaneously drives the upper filter belt drive roller and the lower filter belt drive roller, while the upper filter belt drive roller and the lower filter belt drive roller There is no longer any drive or linkage connection between them. Because it is a chain drive, and the main drive sprocket of the driving device drives the driven sprocket of the upper filter belt drive roller and the lower filter belt drive roller at the same time, the limitation of the space position often causes the chain and one of the drive roller driven sprockets The meshing and clamping angle of the belt filter is small, and the long-term operation of the chain drive is prone to wear and tear, which makes the chain slack. Tooth skipping often occurs, resulting in speed difference and asynchronous operation of the upper and lower filter belts, intermittent relaxation, loss of pressure on the filter cake, and a serious impact on the dehydration effect. At the same time, the loose filter belt is also prone to deviation and wrinkles, which not only affects the stability of the belt filter press, but also affects the service life of the filter belt. the

4. The mechanical strength of the roller is not enough, and it is prone to cracking and breaking. The structural design and manufacturing process of the existing belt filter press roller are: the roller is composed of a roller body, two end webs and a mandrel, and the end webs are located at the two ends of the roller body. The outer circumference is welded with the inner circumference of the roller barrel, and the inner circumference is welded with the mandrel. Practice has proved that when the pressure rollers of the belt filter press are arranged in an S shape, and the pressure on the pressure rollers only comes from the tension of the filter belt, this structure can basically meet the use requirements. However, when the pressure rollers are arranged in an S-shape, the counter-roll arrangement is added at the same time, and the pressing force of the counter-rolls is set relatively large, the defect of insufficient mechanical strength of this structure will be very obvious, and it is easy to Cracks occurred at the weld between the web plate and the mandrel, which made the belt filter press unusable. the

5. The design of the permeable roller is not reasonable enough, and the water outlet efficiency is not high. The first pressure roller in the feeding direction of the existing belt filter press is generally installed with a water-permeable pressure roller. Consisting of three barrel lining rings and a mandrel, there is a water outlet on the outer circumference of the end surface spoke plate, which is welded to the two ends of the perforated cylinder body, the outer circumference of the barrel lining ring does not have a water outlet, and is welded to The inside of the perforated cylinder, between the end-face webs, and the inner circumference of the end-face webs are welded to the mandrel. Practice has proved that such a design has obvious shortcomings, that is, the water that is squeezed out from the upper part of the inner side of the roller and enters the inner part of the roller cannot be directly discharged from the two ends of the roller, but flows from top to bottom. Into the material being pressed and unfiltered in the lower part, resulting in the loss of dehydration efficiency. At the same time, there is no water outlet on the outer circumference of the lining ring of the drum, which will cause some of the water flowing into the drum to fail to flow out from both ends of the drum, forming a small "pool" with a high water level, which will soon enter the filter press area of the drum. The material is diluted and squeezed to the rear and both sides, resulting in a thin middle of the final pressed filter cake, or even no material, which will also affect the dehydration efficiency of the belt filter press. the

6. The extrusion area of the pair of rollers is too small, and the dehydration of the material is not sufficient. In order to increase the extrusion force on the material during the filter press process and enhance the dehydration effect of the belt filter press, the existing belt filter press generally adopts the design of part of the pressure rollers as a one-to-one pair of roller installations, and achieves better effect. But because it is one-to-one, the material is only subjected to one line of extrusion force on each pair of pressure rollers, so the area subjected to the extrusion force of the pair of rollers is too small, and has already left the filter press area before achieving sufficient dehydration. , the dehydration effect is also subject to greater constraints. the

7. The angle between the upper and lower filter belts and the horizontal plane is too large, and the feeding is uneven. In the design and manufacture of the existing belt filter press, the angle between the lower filter belt and the horizontal plane and the angle between the upper filter belt and the lower filter belt before entering the first pressure roller in the belt filter press zone have basically not considered the dehydration effect. The main problem is that the two included angles are too large. If the angle between the lower filter belt and the horizontal plane is too large, the material that has been evenly spread on the lower filter belt by the distributing device or distributing machine will slide or roll, and the phase of the material will change, becoming uneven and uneven. After the filter press area, the thickness of the cake will be uneven, and the pressure distribution everywhere will be uneven. The water content of the cake after the filter press will be unstable. In severe cases, the filter belt will be out of sync, wrinkles will appear, and the life of the filter belt will be reduced. . However, if the angle between the upper filter belt and the lower filter belt is too large, the material does not receive any pressure from the upper and lower filter belts before entering the filter press area. When it reaches the first pressure roller, it suddenly receives a lot of pressure, and the material will retreat. It is impossible to make the material cake reach the desired thickness, which seriously affects the output of the equipment. the

8. The distributing device arranges the material to be filtered to the upper filter belt, and the distributing effect is not good. In the existing belt filter press, the material distributing device is often installed above the upper filter belt, and the material to be filtered is arranged on the upper filter belt, and then arranged on the lower filter belt through the upper filter belt. Although this arrangement increases the length of the gravity dehydration zone a little, it will appear that the material that is evenly arranged on the upper filter belt will change its phase after falling on the lower filter belt, and will become uneven and uneven, and will enter the filter press. After the zone, the thickness of the cake will be uneven, and the pressure distribution will be uneven. The water content of the cake after the filter press will be unstable. In severe cases, the filter belt will be out of sync, wrinkles will appear, and the life of the filter belt will be reduced. the

9. The thickness of the adhesive layer of the pressure roller and the driving roller is not enough. The thickness of the rubber layer on the outer surface of the pressure roller and the driving roller of the existing belt filter press is generally between 5-6mm. Because the rubber is too thin, the surface of the roller is very hard and the elasticity is small, and the contact surface with the filter belt cannot be formed. The "engagement" depth is not enough, so the friction between the filter belt and the filter belt will be relatively small. When the tension of the filter belt is increased in order to improve the dehydration efficiency of the belt filter press, the driving roller must bear a relatively large load. The filter belt tends to slip, which causes the filter belt to be out of sync, and the belt filter cannot be dehydrated normally. the

Therefore, there is an urgent need for a more scientific and reasonable layout and installation of rollers and filter belts, more scientific and reasonable design and processing of rollers, high mechanical strength, ability to withstand large pressures, higher driving stability and reliability, and more uniform and reasonable cloth. A new type of belt filter press, so as to further improve the dehydration efficiency of the filter press material and reduce the cost of subsequent drying treatment of the material. In view of the above discussion, after continuous research, design, and repeated verification, the inventor finally created the present invention with practical value. the

Contents of the invention

The purpose of the present invention is to overcome the shortcomings in the design and function of the existing belt filter press, and provide a new type of high-efficiency belt filter press, whose dehydration efficiency is greatly improved compared with the existing belt filter press. the

The object of the present invention is also to provide a new high-efficiency belt filter press, whose operation stability and reliability are greatly improved compared with the existing belt filter press. the

The purpose of the present invention is achieved through the following technical solutions: a new type of high-efficiency belt filter press, including a frame, a driving device, a roller, a filter belt, a filter belt tensioning device, a filter belt deviation adjustment device, Pressing device, material distributing device, filter belt cleaning device, discharge scraper and water receiving tray, rollers include driving rollers, pressure rollers, tension rollers, guide rollers, deflection adjustment rollers, idler rollers; pressure rollers include main pressure rollers and squeeze rollers The pressure roller is characterized in that: in the filter press area, the main pressure rollers are arranged in a spiral ascending order from low to high in the vertical direction of the horizontal plane, and the two adjacent main pressure rollers have the highest horizontal position of the top of the previous one. The horizontal position of the bottom of the roller is equal to or equal to the latter; the upper filter belt and the lower filter belt overlap and entrain the filter material to enter the filter press area from the main pressure roller at the lowest position; the upper filter belt and the lower filter belt enter each of the filter press areas Each main pressure roller enters from its lower part and leaves from its upper part. the

The angle between the upper filter belt and the horizontal plane between the lower tangent point of the upper filter belt tensioning roller and the lower tangential point of the first main pressure roller is less than 20 degrees, and the angle between the upper tangential point of the lower filter belt tensioning roller and the first main pressure roller The angle between the lower filter belts between the lower tangent points of the two main pressure rollers is less than 10 degrees. the

One or more of the pressure rollers are high water permeability pressure rollers. the

The high water permeability pressure roller is characterized in that it includes a perforated cylinder, an axial liner, and a main shaft, the main shaft is located in the perforated cylinder, and the axial liner is welded between the perforated cylinder and the main shaft. the

The axial liner is welded between the perforated cylinder and the main shaft at an angle of 0-45 degrees to the main shaft axis. the

The main shaft is a combined stepped shaft. the

The combined stepped shaft includes a support cylinder, a spoke plate and a mandrel. the

The spoke plates include end face spoke plates and cylinder inner spoke plates. the

Rib plates are welded on the webs. the

The holes on the perforated cylinder are round holes or oval holes with a large top and a small bottom, and are distributed in the shape of "pin" or "plum blossom" or other geometric shapes. the

The pressure roller-to-roll arrangement has a pair or more than one pair installed in the form of one main pressure roller paired with more than one extrusion pressure roller. the

The plurality of extrusion pressure rollers that are mounted opposite to one main pressure roller are provided with extrusion force by the same pair of roller extrusion devices. the

The plurality of extrusion pressure rollers that are mounted opposite to one main pressure roller are respectively provided with extrusion force by a plurality of equal or unequal number of extrusion pressure rollers. the

The thickness of the adhesive layer on the outer surface of the pressure roller and the driving roller is more than 10 mm. the

One or more of the rollers are reinforced rollers. the

The reinforced roller includes a cylinder body, end surface webs and a mandrel, and is characterized in that it also includes an inner cylinder web installed between the end surface webs. the

Rib plates are welded on the end face web or the cylinder inner web. the

The distributing device is installed above the lower filter belt between the tension roller of the lower filter belt and the first main pressure roller in the filter press area, and directly arranges the material to be filtered on the lower filter belt. the

The hopper of the distributing device is a trapezoid or other geometric shapes with a small upper opening and a larger lower opening. the

The upper filter belt drive roller and the lower filter belt drive roller are respectively equipped with transmission devices that cooperate with each other for transmission. the

The transmission device is meshing gears or fitted friction wheels, belts and pulleys, chains and sprockets. the

The driving device independently drives the upper filter belt drive roller or the lower filter belt drive roller through chain drive or gear drive, friction drive, belt drive and coupling. the

Innovation point and beneficial effect of the present invention are:

1. It is proposed and adopted that "the main pressure rollers in the filter press area are arranged in a spiral ascending order from low to high in the vertical direction of the horizontal plane. For two adjacent main pressure rollers, the horizontal position of the top of the previous one is higher than that of the previous one." or equal to the latter’s horizontal position of the roller bottom”, fundamentally overcomes and solves the fatal defects of the existing belt filter press that the water extruded by the belt filter press flows around and cannot be collected, the dehydration efficiency is low, and clean production cannot be done. The problem is that the water squeezed out of the material on any pressure roller can only gather at the bottom of the roller and flow into the water receiving tray under the roller, and will not and cannot flow back along the filter belt or flow to the filter press In the material, all the separation and collection are realized, and the dehydration efficiency of any pressure roller is not lost, which greatly improves the dehydration efficiency of the filter press. the

2. Proposed and adopted the "upper filter belt and lower filter belt overlapping entrainment filter material enters the filter press area from the main pressure roll at the lowest position; the upper filter belt and the lower filter belt enter each main pressure roll in the filter press area All of them are wound from the lower part, and the upper part leaves" innovative technical scheme, so that the area where the material is subjected to the greatest pressure on the pressure roller, that is, the high water outlet area is located in the middle and lower part of the pressure roller, and the material is squeezed out on this area The flow direction of the water is just opposite to the running direction of the filter belt, which is more conducive to the separation of water and materials. At the same time, when the water squeezed out of the upper part of the pressure roller flows to the middle and lower part, because the pressure in the middle and lower part is greater than the pressure in the middle and upper part, the water will not be sucked back, and it can only flow and collect downwards. . Therefore, it overcomes the defect that the extruded water is sucked back by the material in the prior art solution, and the dehydration efficiency is seriously lost, and the dehydration efficiency of the pressure roller is greatly improved. the

3. The angle between the upper filter belt and the horizontal plane between the lower tangent point of the upper filter belt tensioning roller and the lower tangential point of the first main pressure roller is less than 20 degrees, and the upper tangential point of the lower filter belt tensioning roller to the first The innovative technical scheme that the angle between the lower filter belts between the lower tangent points of the main pressure rollers is less than 10 degrees" not only enables the material phase to be evenly spread on the lower filter belt by the material distribution device without being damaged, but also uniformly Entering the filter press area, it can effectively avoid the phenomenon of unstable moisture content, asynchronous filter belt and loose wrinkles caused by uneven thickness and discontinuity of the cake, and make the upper filter belt and the lower filter belt form a reasonable Large and small wedge-shaped areas, the material is pre-pressed by the upper and lower filter belts before entering the filter press area, and is gradually clamped to initially form a cake to avoid the phenomenon of "vomiting". The amount of dehydration in this area is increased, which is beneficial to reduce the moisture content of the material after press filtration. the

4. Propose and adopt the innovative technical scheme of "arranging and installing one main pressure roller to two or more extrusion pressure rollers", so that the material is squeezed by the rollers for many times on each group of pressure rollers, and the filter is pressed The extrusion area of the rollers in the zone can be increased several times, the dehydration process of the material is longer, the dehydration is more complete, and the dehydration rate is higher, so that the dehydration efficiency of the belt filter press can be significantly improved. the

5. The adoption of the technical scheme of "high-efficiency water-permeable pressure roller" also effectively solves the shortage of water backflow material squeezed out during the working process of the existing water-permeable pressure roller, and significantly improves the dehydration efficiency of the water-permeable pressure roller. the

6. The adoption of the "reinforced roller" technical scheme greatly improves the mechanical strength of the roller, and adjusts a greater tension force for the filter belt. Reducing the moisture content of the material after press filtration creates the necessary conditions and improves the reliability of the belt filter press operation. the

7. Adopt the technical scheme of "installing the distributing device above the lower filter belt between the tension roller of the lower filter belt and the first main pressure roller in the filter press area, and directly arrange the materials to be filtered on the lower filter belt", which can make The material evenly distributed by the material distribution device remains unchanged before entering the filter press area, which not only ensures the integrity, uniformity and continuity of the filter cake, but also helps to ensure a stable dehydration rate and output, and is also conducive to equipment maintenance. Stable operation. the

8. The adoption of the technical scheme of "the thickness of the adhesive layer on the outer surface of the pressure roller and the driving roller is more than 10mm" makes the surface of the roller have higher elasticity, and can form a deeper "engagement" with the contact surface of the filter belt during work, greatly The range increases the friction between each other. When the tension of the filter belt is increased in order to improve the dehydration efficiency of the belt filter press, when the driving roller bears a relatively large load, it can effectively avoid the slipping of the filter belt and ensure the operation of the filter belt. synchronization and stability. the

9. The adoption of the new drive system solves and overcomes the speed difference and asynchronous operation of the upper filter belt and the lower filter belt caused by tooth jumping in the existing drive system, intermittent relaxation occurs, and the filter cake loses pressure , the dehydration effect is seriously affected, which ensures the stability and reliability of the filter belt operation. the

The above description is only an overview of the technical solutions of the present invention. In order to understand the technical means of the present invention more clearly and implement them according to the contents of the description, the preferred embodiments of the present invention and accompanying drawings are described in detail below. the

The specific embodiment of the present invention is given in detail by the following examples and accompanying drawings. the

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention;

Fig. 2 a is the structural representation of the high water-permeable pressure roller of the present invention;

Fig. 2b is a schematic structural view of the high water-permeable pressure roller of the present invention;

Fig. 2c is a left view structural schematic diagram of the high water-permeable pressure roller of the present invention;

Fig. 3 a is the structural representation of the main shaft of the high water-permeable pressure roller of the present invention;

Fig. 3 b is the A-A sectional structure schematic diagram of accompanying drawing 3 a of the present invention;

Fig. 4 a is the schematic diagram of the installation embodiment of the roller of the present invention;

Fig. 4 b is the schematic diagram of the installation embodiment of the roller of the present invention;

Fig. 4c is the schematic diagram of the installation embodiment of the roller of the present invention;

Fig. 5 a is the front view structure schematic diagram of the thickness of the adhesive layer on the surface of the pressure roller and the driving roller of the present invention;

Fig. 5 b is a left view structural representation of the thickness of the adhesive layer on the surface of the pressure roller and the driving roller of the present invention;

Fig. 6a is the schematic diagram of the front structure of the reinforced pressure roller of the present invention;

Fig. 6b is a left view structural representation of the reinforced pressure roller of the present invention;

Fig. 7a is a partial structural schematic diagram of Embodiment 1 of the drive system of the present invention;

Figure 7b is a schematic diagram of a partial structure of Embodiment 1 of the drive system of the present invention;

Figure 7c is a partial structural schematic diagram of Embodiment 1 of the drive system of the present invention;

Fig. 8a is the partial structure schematic diagram of embodiment 2 of the driving system of the present invention;

Figure 8b is a partial structural schematic diagram of Embodiment 2 of the drive system of the present invention;

Fig. 8c is a partial structural schematic diagram of Embodiment 2 of the drive system of the present invention;

in:

1: Rack 2: Drive device

3: Upper filter belt 4: Lower filter belt

5: Main pressure roller 6: Main pressure roller

7: Main pressure roller 8: Main pressure roller

9: Squeeze pressure roller 10: Squeeze pressure roller

11: Squeeze pressure roller 12: Roller extrusion device

13: Roller extrusion device 14: Roller extrusion device

15: Water tray 16: Water tray

17: Drain tray 18: Drain tray

19: Drain tray 20: Guide roller

21: Guide roller 22: Guide roller

23: Guide roller 24: Guide roller

25; Upper filter belt tension roller 26: Lower filter belt tension roller

27: Upper filter belt drive roller 28: Lower filter belt drive roller

29: Distributing device 30: Upper filter belt deflection roller

31: Lower filter belt deviation adjustment roller 32: Upper filter belt deviation adjustment device

33: Lower filter belt deviation adjustment device 34: Upper filter belt cleaning device

35: Lower filter belt cleaning device 36: Upper filter belt tensioning device

37: Lower filter belt tensioning device 38: Idler roller

39: Upper unloading scraper 40: Lower unloading scraper

41: Water tray drain pipe 42: Cylinder with holes

43: Axial liner 44: Main shaft

45: Support cylinder 46: End radial plate

47: Tube inner spoke plate 48: Mandrel

49: Rib plate 50: Cylinder body

51: Radial plate on end face 52: Radial plate

53: Rib plate 54: Mandrel

55: Driving device transmission sprocket 56: Transmission chain

57: Drive sprocket of upper filter belt drive roller 58: Drive gear of upper filter belt drive roller

59: Lower filter belt drive roller transmission gear 60: Coupling

Detailed ways

In order to further explain the technical means and effects adopted by the present invention to achieve the purpose of the predetermined utility model, the specific implementation and structure of a new type of high-efficiency belt filter press proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , features and their effects are described in detail below. the

As shown in Figure 1, a new type of high-efficiency belt filter press in a preferred embodiment of the present invention includes a frame 1, a driving device 2, an upper filter belt 3 and a lower filter belt 4, and four main pressure rollers, namely the main pressure Roller 5, main pressure roller 6, main pressure roller 7, main pressure roller 8, three extrusion pressure rollers namely extrusion pressure roller 9, extrusion pressure roller 10, extrusion pressure roller 11, three pair of roller extrusion devices That is, the roller extruding device 12, the roller extruding device 13, the roller extruding device 14, five water receiving trays namely the water receiving tray 15, the water receiving tray 16, the water receiving tray 17, the water receiving tray 18, the water receiving tray Disc 19, five guide rollers namely 20, guide roller 21, guide roller 22, guide roller 23, guide roller 24, upper filter belt tension roller 25 and lower filter belt tension roller 26, upper filter belt driving roller 27 and lower Filter belt driving roller 28, material distribution device 29, upper filter belt deviation adjustment roller 30 and lower filter belt deviation adjustment roller 31, upper filter belt deviation adjustment device 32 and lower filter belt deviation adjustment device 33, upper filter belt cleaning device 34 and lower Filter belt cleaning device 35 , upper filter belt tensioning device 36 and lower filter belt tensioning device 37 , idler roller 38 , upper discharge scraper 39 and lower discharge scraper 40 , water tray drain pipe 41 . The main pressure roller refers to the pressure roller that runs around the upper filter belt and the lower filter belt overlapped. The squeeze pressure roller refers to a pressure roller that is installed opposite to the main pressure roller and can squeeze the main pressure roller. The filter press area refers to the area where the upper filter belt and the lower filter belt overlap and entrain the filter press material to contact the first main pressure roller and leave the last main pressure roller to complete the dehydration process of being squeezed by the pressure roller. the

According to the present invention, "in the filter press area, the main pressure rollers are arranged in a spiral ascending order from low to high in the vertical direction of the horizontal plane, and the two adjacent main pressure rollers have a roller top horizontal position higher than or Equal to the horizontal position of the bottom of the latter roller", as shown in Figure 1, in this embodiment, the main pressure roller 5, the main pressure roller 6, the main pressure roller 7, and the main pressure roller are arranged in a spiral ascending order from low to high. 8, and the horizontal position of the top of the main pressure roller 5 is higher than or equal to the horizontal position of the bottom of the main pressure roller 6, the horizontal position of the top of the main pressure roller 6 is higher than or equal to the horizontal position of the bottom of the main pressure roller 7, the main The horizontal position of the top of the pressure roller 7 is higher than or equal to the horizontal position of the bottom of the main pressure roller 8, and so on. Such a technical solution is mainly to ensure that the moisture that is squeezed out of the material on any main pressure roller can only collect at the bottom of the roller and fall into the water receiving tray below it in the process of flowing downward. the goal of. If the installation space of frame 1 is not allowed, at least ensure that the horizontal position of the top of the previous main pressure roller and the horizontal position of the bottom of the next main pressure roller are on the same plane, such as the horizontal position of the top of the main pressure roller 5 It is on the same plane as the horizontal position of the roller bottom of the next main pressure roller 6, so as to avoid that the moisture squeezed out from the last main pressure roller 6 cannot be collected at the bottom of the roller and fall to the water receiving tray 16 below it during the working process. Instead, it flows back along the filter belt to the material that has been filtered by the main pressure roller 5 and the material that is about to enter the filter area. the

As shown in Figure 1, in actual manufacturing and production, after the main pressure roller meets the above installation and layout requirements, the upper filter belt drive roller 27, the lower filter belt drive roller 28 and the upper filter belt tension roller of the belt filter press 25. The lower filter belt tension rollers 26 are respectively installed on both sides of the filter press area formed by the main pressure rollers 5 and 8, the number of the main pressure rollers is an even number, and the upper filter belt 3 and the lower filter belt 4 entrain pressure The filter material enters the filter press area from the main pressure roller 3 which is at the lowest position, so that "upper filter belt 3 and lower filter belt 4 enter the filter press area. Each fixed pressure roller in the filter press area is wound from the lower part, and the upper part leaves. "Technical requirements. Such a technical arrangement can make the area where the material receives the greatest pressure on the main pressure roller, that is, the high water outlet area, always be in the lower part, and the flow direction of the water squeezed out of the material in this area is just in line with the direction of the filter belt. On the contrary, it is more conducive to the separation of moisture and materials. At the same time, when the water squeezed out from the upper part of the main pressure roller flows to the middle and lower part, since the pressure in the middle and lower part is greater than that in the middle and upper part, the water will not be sucked back, and it can only flow downward and collection. Therefore, it can well overcome the disadvantages of the existing technical solutions that the extruded moisture is sucked back by the material and the dehydration efficiency is seriously lost. the

As shown in Figure 1, the angle between the upper filter belt 4 and the horizontal plane between the lower tangent point of the upper filter belt tension roller 25 and the lower tangent point of the first main pressure roller 5 is less than 20 degrees. The included angle between the lower filter belt between the upper tangent point of the tension roller 26 and the lower tangent point of the first main pressure roller 5 is less than 10 degrees, that is, angle a is less than 20 degrees, and angle b is less than 10 degrees. Such an arrangement can not only make the lower filter belt in this section relatively smooth, but also the phase of the material evenly spread on it by the distributing device will not be damaged, and will evenly enter the filter press area. Moreover, the upper filter belt 3 and the lower filter belt 4 can form a wedge-shaped area of reasonable size in this section before overlapping, and the material is gradually clamped by the pre-pressure of the upper filter belt and the lower filter belt before entering the filter press area. Cake is formed to avoid the phenomenon of "vomiting". At the same time, the pre-pressure is superimposed with the gravity of the material, which further increases the dehydration amount in this area, which is beneficial to reduce the moisture content of the material after pressing. During specific implementation, the upper filter belt can also be pressed down by installing a guide roller between the upper filter belt tension roller and the first main pressure roller, or, even simultaneously, between the lower filter belt tension roller and the first main pressure roller. Install guide rollers between them to press the lower filter belt up, and further adjust the running route between the upper filter belt and the lower filter belt, so that the angle values of angle a and angle b meet the above technical requirements. the

At least one of the pressure rollers is a high water permeability pressure roller. Since the moisture content of the material is very high when the filter is started, in order to make the water have enough space and channels to flow out of the material when the material is squeezed, and accelerate the separation of water and material, thereby improving the dehydration efficiency, generally the first filter in the filter press area Each main pressure roller, i.e. the main pressure roller 5 among Fig. 1 is all processed into high water-permeable pressure roller. At the same time, if the initial moisture content of the filter press material is relatively high, the second main pressure roll, that is, the main pressure roll 6 in Fig. 1 can also be processed into a high water permeability pressure roll. As shown in FIG. 2 , the high water permeability pressure roller includes a perforated cylinder 42 , an axial liner 43 and a main shaft 44 . The main shaft 44 is located in the cylinder with holes 42 , and the axial liner 43 is welded between the cylinder with holes 42 and the main shaft 44 . The axial liner 43 is welded between the cylinder with holes 42 and the main shaft 44 at an angle of 0-45 degrees to the axis of the main shaft 44 . If the axis liner 43 of the axial liner 43 forms an angle of 5 degrees with the axis of the main shaft 44, no matter the pressure roller rotates to any angle, the drainage channel formed by the cylinder with holes 42, the axial liner 43 and the main shaft 44 is in the shape of a head height. With a low and inclined shape, the moisture entering the roller will be discharged from both ends of the pressure roller at a faster speed because of the drop. In order to accelerate the discharge of water, the height of the drainage channel composed of the perforated cylinder 42, the axial liner 43 and the main shaft 44 cannot be designed too high, and it is generally ideal to be controlled between 50-80 mm. Therefore, the main shaft 44 is required. The shaft diameter of the shaft is relatively large. In order to save cost, reduce the weight of the roller, and meet the requirements of mechanical strength, the main shaft can be designed as a combined stepped shaft. As shown in FIG. 3 , the combined stepped shaft includes a support cylinder 45 , webs, and a mandrel 48 . The spoke plates include end face spoke plates 46 and tube inner spoke plates 47 . In order to further increase the mechanical strength of the roller, rib plates 49 are welded on the webs, generally 3-6 pieces are welded on each web. In order to facilitate anti-corrosion and prolong service life, the perforated cylinder 42 is made of stainless steel or ordinary steel coated with an anti-corrosion material layer. In order to prevent the edge of the hole from being too sharp, which may easily scratch the filter belt, and is more conducive to the flow and separation of water, the holes on the perforated cylinder 42 are round holes or oval holes with a large top and a small bottom, which are in the shape of "pin" or "pin". "Plum blossom" shape, or other geometric shapes. the

In order to increase the extrusion area of the material in the filter press process, some or even all of the pressure rolls in the filter press area can be arranged as a pair of rolls. When designing and determining the pair of rolls, if the roll diameter of the main pressure roll is small, or there are fewer requirements for the extrusion area of the pair of rolls, the pair of rolls can be designed as a pair of main pressure rolls and one squeeze pressure roll. As shown in Figure 1, the main pressure roller 6 is paired with the extrusion pressure roller 9, the main pressure roller 7 is paired with the extrusion pressure roller 10, and the main pressure roller 8 is paired with the extrusion pressure roller 11. As shown in Figure 4, taking the main pressure roller 6 as an example, if the roller diameter is relatively large, and the design function of the belt filter press requires more roller extrusion areas, the roller can be designed as one Main pressure roller 6 pairs two (as shown in Figure 4a) or three (as shown in Figure 4b, c), even more than three extrusion pressure rollers 9 pairs of outfits. For example, when one main pressure roller 6 pairs and three extrusion pressure rollers 9 pairs are installed, for the convenience of installation and aesthetics, the three extrusion pressure rollers (9) are designed to have the same roll diameter and are installed on the same arc-shaped bearing seat , controlled by the same pair of roller extrusion devices 12 (as shown in Figure 4b). When the arc-shaped bearing block is designed and installed, its arc is on the indexing circle with the center of the main pressure roller 6 as the center. As shown in Figure 4c, when one main pressure roller 6 is installed on three extrusion pressure rollers 9, the three extrusion pressure rollers 9 can also be controlled by three pair of roller extrusion devices 12 respectively, so that by adjusting each pair of roller extrusion The different pressures of the pressing device 12 can form a plurality of roller pressing areas with gradually increasing pressure on a main pressure roller 6 from low to high, which is more beneficial to the improvement of dehydration efficiency. In order to give full play to the efficiency of roller extrusion, no matter what form of installation is adopted, the pressure direction of the roller extrusion device 12 acting on the extrusion pressure roller 9 and the main pressure roller 6 must pass through the center of the extrusion pressure roller 9 and the main pressure. The center of the roller 6. Main pressure roller 6 and extrusion pressure roller 10, the structure and connection relation of main pressure roller 8 and extrusion pressure roller 11, pair of roller extrusion device 14 are that main pressure roller 6 extrusion pressure rollers 9. The roller extrusion device 12 is the same. the

As shown in Figure 5a and Figure 5b, in order to improve the friction coefficient, increase the frictional force, and prevent the filter belt from slipping with the pressure roller and the driving roller, the pressure roller, the driving roller such as the main pressure roller 6, 7, 8, extrusion The thickness d of the adhesive layer on the outer surface of the pressure rollers 9, 10, 11, the upper filter belt drive roller 27 and the lower filter belt drive roller 28>10mm. In practical application, from the perspective of satisfying effect requirements and cost control, the thickness of the adhesive layer of main pressure roller 6, main pressure roller 7, main pressure roller 8, upper filter belt drive roller 27 and lower filter belt drive roller 28 is 15-20mm It is more suitable, so that the elasticity of the roller surface is moderate, which can not only provide enough friction force, but also avoid the roller surface being too soft, so that the filter belt is easy to fold and wrinkle. It is more ideal that the thickness of the adhesive layer of the extrusion pressure rollers 9, 10, and 11 is 30-50mm, so that the surface of the rollers has greater elasticity, and when the rollers are squeezed, the surface of the rollers can produce appropriate elastic deformation , which is beneficial to hold the material and prevent the material from being squeezed out from both sides of the filter belt, and the dehydration effect is more ideal. In order to better cooperate and meet the above technical requirements, during the processing of the rubber coating of the above-mentioned rollers, the driving roller and the main pressure roller are made of rubber materials with relatively high hardness, while the extrusion pressure roller is made of rubber materials with relatively low hardness. the

As shown in Fig. 6a and Fig. 6b, in order to provide implementation conditions for the high-pressure roller extrusion of materials, the rollers are processed into reinforced rollers. The reinforced roller includes a cylinder body 50 , an end surface web 51 and a mandrel 54 , and it also includes an inner cylinder web 52 welded between the end surface webs 51 . Generally, 2-3 roller plates 52 are installed in the cylinder. If three radial plates are installed in the cylinder, the installation distance between two of them and the end face radial plate 51 is 1.5-2 times of the axial extension of the mandrel 54, and one is installed in the middle of the mandrel 54. In actual production, in order to further improve its mechanical strength, reinforcing ribs 53 can also be welded on the end surface web 51 or the cylinder inner web 52 . Generally, 3-6 rib plates 53 are welded on each web plate 51 . the

As shown in Figure 1, the cloth distribution device 29 of the present invention is installed above the section of the lower filter belt 4 between the lower filter belt tension roller 26 and the first main pressure roller 5 in the filter press area, and directly presses the material to be filtered Arranged on the lower filter belt 4. The material distributing device 29 can be a trapezoidal hopper with a small upper opening and a large lower opening. During operation, the lower filter belt 4 runs to bring the material out through friction, and a scraper plate for adjusting the thickness of the material is provided at the outlet. . This design is very simple and practical. It not only avoids the material clogging and blocking of the conventional funnel-type hopper with a large top and a small bottom, but also does not need to increase the feeding power. At the same time, the distributing device 29 can also be a trapezoidal hopper with a small upper opening and a large lower opening. A power-driven pressing shaft with teeth on the surface is installed at the discharge port to adjust the height of the pressing shaft. position, you can adjust the thickness of the fabric. By installing the pressing shaft, a certain material crushing function can also be realized. In addition, in order to evenly distribute the material falling from the center of the hopper on both sides, so that the width of the cloth meets the design requirements, a spiral feeding shaft with opposite helical directions at both ends and outwards can be installed in the hopper. the

Aiming at the defects and deficiencies existing in the drive system of the existing belt filter press, such as easy tooth skipping and low operational reliability, the present invention adopts a new drive technical solution, that is, the upper filter belt drive roller 27 and the lower filter belt drive roller 27. The belt drive rollers 28 are respectively equipped with transmission devices that cooperate with each other for transmission. The transmission device is a meshing gear or a mating friction wheel, a belt and a pulley, a chain and a sprocket; the driving device 2 is independently driven by a chain drive or a gear drive, a friction drive, a belt drive, or a coupling The upper filter belt drive roller 27 or the lower filter belt drive roller 28. This technical scheme has several implementation modes, enumerates two examples below:

Example 1: As shown in Figure 7a, Figure 7b, and Figure 7c, the driving device 2 installed on the frame 1 of the belt filter press, the driving device transmission sprocket 55, the transmission chain 56, the upper filter belt driving roller 27, the upper Filter belt drive roller transmission sprocket 57, upper filter belt drive roller transmission gear 58, lower filter belt drive roller 28, lower filter belt drive roller transmission gear 59, upper filter belt 3 and lower filter belt 4. The upper filter belt drive roller transmission sprocket 57 and the upper filter belt drive roller transmission gear 58 are respectively installed on the mandrel two ends of the upper filter belt drive roller 27, the upper filter belt drive roller transmission gear 58 and the lower filter belt drive roller transmission gear 59 Engagement, the driving device transmission sprocket 55 drives the upper filter belt drive roller transmission sprocket 57 to rotate through the transmission chain 56, and the upper filter belt drive roller transmission gear 58 drives the lower filter belt drive roller transmission gear 59 to rotate, and the upper filter belt drive roller 27 and The lower filter belt drive roller 28 drives the upper filter belt 3 and the lower filter belt 4 to run respectively. During operation, the tightness of the transmission chain 56 can be adjusted through the adjusting device on the fixed support of the driving device 2 . the

Example 2: As shown in Figure 8a, Figure 8b, and Figure 8c, the driving device 2 installed on the belt filter press frame 1, the upper filter belt drive roller 27, the upper filter belt drive roller transmission gear 58, the lower filter belt Driving roller 28, following filter belt drive roller transmission gear 59, upper filter belt 3 and lower filter belt 4. The coupling 60 of the driving device 2 is connected with the mandrel of the lower filter belt drive roller 28, the upper filter belt drive roller transmission gear 58 meshes with the lower filter belt drive roller transmission gear 59, and the drive device 2 drives the lower filter belt drive roller 28 to Rotate down, the lower filter belt drive roller transmission gear 59 drives the upper filter belt drive roller transmission gear 58 to rotate upwards, the upper filter belt drive roller 27 drives the upper filter belt 3 to run upward, and the lower filter belt drive roller 28 drives the lower filter belt 4 downward run. the

The new drive system of the present invention also includes: when the transmission sprocket and the transmission gear on the described upper filter belt drive roller 27 or the lower filter belt drive roller 28 are installed on the same side of the roller, the sprocket is on the outside and the gear In the inner side; the drive device 2 can be installed on the frame 1, and can also be installed outside the frame 1; the drive device 2 drives the upper filter belt drive roller 27 and the lower In addition to the filter belt drive roller 28, it can also be driven by means of gear transmission, friction transmission, and belt transmission; the transmission and linkage between the upper filter belt drive roller 27 and the lower filter belt drive roller 28 can also be used in addition to meshing gears. Fitting friction wheels, belts and pulleys, chains and sprockets, etc.; according to different operating environments, the drive device 2 is one of variable frequency motors, electromagnetic speed regulating motors, ordinary motors, and diesel (gasoline) engines , or a combination of one of them with cycloidal pin gear reducer, hardened cylindrical gear reducer, helical gear reducer, helical worm gear reducer. the

The filter belt tensioning device is an adjustment mechanism of an air cylinder or an air bag, a hydraulic cylinder, and a spring. the

The filter belt cleaning device has at least one upper filter belt and one lower filter belt; the filter belt cleaning device uses high-pressure water or high-pressure air as the cleaning medium. the

The filter belt deviation adjustment device is adjusted by a cylinder or an air bag, and the deviation adjustment sensor adopts a deviation correction valve or a photoelectric switch; the filter deviation adjustment device is installed at least one on each of the upper filter belt and the lower filter belt. the

The roller pressing device is an air cylinder or an air bag. the

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all the content that does not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence still belong to the scope of the technical solutions of the present invention. the

Claims (22)

1. A new type of high-efficiency belt filter press, including a frame, a driving device, a roller, a filter belt, a filter belt tensioning device, a filter belt deviation adjustment device, a roller pressurizing device, a material distribution device, and a filter belt cleaning device , a discharge scraper and a water receiving tray, and the rollers include driving rollers, pressure rollers, tension rollers, guide rollers, deflection adjustment rollers, and support rollers; the pressure rollers include main pressure rollers and squeeze pressure rollers, characterized in that: In the zone, the main pressure rollers are arranged in a spiral ascending order from low to high in the vertical direction of the horizontal plane. For two adjacent main pressure rollers, the horizontal position of the top of the former roller is higher than or equal to the horizontal position of the bottom of the latter roller. The upper filter belt and the lower filter belt overlap and entrain the filter material to enter the filter press area from the main pressure roller at the lowest position; the upper filter belt and the lower filter belt enter each main pressure roller in the filter press area from the lower part of the winding Enter, upper leave. 2. A new type of high-efficiency belt filter press according to claim 1, characterized in that: the upper filter belt between the lower tangent point of the upper filter belt tension roller and the lower tangent point of the first main pressure roller The angle between the horizontal planes is less than 20 degrees, and the angle between the lower filter belt between the upper tangent point of the lower filter belt tensioning roller and the lower tangent point of the first main pressure roller is less than 10 degrees. 3. A new high-efficiency belt filter press according to claim 1, characterized in that: at least one of said pressure rollers is a high water permeability pressure roller. 4. A new type of high-efficiency belt filter press according to claim 3, characterized in that: the high water permeability pressure roller includes a perforated cylinder, an axial liner, and a main shaft, and the main shaft is located in the perforated cylinder Inside, an axial liner is welded between the perforated barrel and the main shaft. 5. A new high-efficiency belt filter press according to claim 4, characterized in that: said axial liner is welded between the perforated cylinder and the main shaft at a certain angle or parallel to the axis of the main shaft. 6. The new high-efficiency belt filter press according to claim 5, characterized in that: said main shaft is a combined stepped shaft. 7. A new type of high-efficiency belt filter press according to claim 6, characterized in that: the combined stepped shaft includes a supporting cylinder, a web, and a mandrel. 8. A new high-efficiency belt filter press according to claim 7, characterized in that: said webs include end webs and cylinder inner webs. 9. A new type of high-efficiency belt filter press according to claim 8, characterized in that: said web plate is welded with reinforcing ribs. 10. A new type of high-efficiency belt filter press according to claim 9, characterized in that: the hole on the perforated cylinder is a round hole or an oval hole with a large top and a small bottom, in the shape of a "pin" distributed. 11. A new type of high-efficiency belt filter press according to claim 1, characterized in that: said pressure rollers are installed in the form of one main pressure roller paired with two or more extrusion pressure rollers . 12. A new type of high-efficiency belt filter press according to claim 11, characterized in that: the plurality of extrusion pressure rollers mounted opposite to one main pressure roller are provided by the same pair of roller extrusion devices. pressure. 13. A new type of high-efficiency belt filter press according to claim 11, characterized in that: the plurality of squeeze pressure rollers that are paired with a main pressure roller are composed of a plurality of pair rollers equal in number The pressing devices respectively provide the pressing force. 14. A new type of high-efficiency belt filter press according to claim 1, characterized in that: the thickness of the adhesive layer on the outer surface of the pressure roller and the driving roller is more than 10mm. 15. A new high-efficiency belt filter press according to claim 1, characterized in that: said roller is a reinforced roller. 16. A new type of high-efficiency belt filter press according to any one of claims 14-15, characterized in that: the reinforced roller includes a cylinder body, an end surface web and a mandrel, and also includes a mounting The inner webs of the cylinder between the end webs. 17. A new type of high-efficiency belt filter press according to claim 16, characterized in that: said end face web or cylinder inner web is welded with reinforcing ribs. 18. A new type of high-efficiency belt filter press according to claim 1, characterized in that: the cloth distribution device is installed on the lower filter belt between the tension roller of the lower filter belt and the first main pressure roller in the filter press area. Above the belt, the material to be filtered is directly arranged on the lower filter belt. 19. A new type of high-efficiency belt filter press according to claim 18, characterized in that: the hopper of the material distributing device is in the shape of a trapezoid with a small upper opening and a large lower opening. 20. A new type of high-efficiency belt filter press according to claim 1 is characterized in that: said driving roller includes an upper filter belt driving roller and a lower filter belt driving roller, and the upper filter belt driving roller and the lower filter belt The drive rollers are respectively equipped with transmission devices that cooperate with each other for transmission. 21. A new type of high-efficiency belt filter press according to claim 20, characterized in that: said transmission device is meshing gear or fitting friction wheel, belt and pulley, chain and sprocket. 22. A new type of high-efficiency belt filter press according to claim 1, characterized in that: said driving device independently drives the upper filter through chain transmission, gear transmission, friction transmission, belt transmission, and coupling Belt drive roll or lower filter belt drive roll.

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