Device for continuously reciprocating multi-position folding and filter-pressing sludge by using filter cloth

Abstract

The utility model relates to a device for continuously reciprocating multi-position folding and filter-pressing sludge by using filter cloth. The device comprises a feeding system, a pre-pressing system, a folding system, a filter-pressing system and a cleaning system, the feeding system, the pre-pressing system and the folding system are distributed from inside to outside to form at least two sludge pre-treatment systems, and every two sludge pre-treatment systems are symmetrically distributed to form a folding unit; the two sludge pre-treatment systems of each folding unit are connected through continuous filter cloth, the pre-pressing system and the folding system of each sludge pre-treatment system are both connected with the filter cloth, and the feeding system is located above the filter cloth; the two filter pressing systems correspond to the two folding systems of the folding unit respectively; the cleaning system can be used for continuously cleaning the filter cloth. The device disclosed by the utility model can realize the process of continuously folding the filter cloth back and forth in two folding systems and continuously treating sludge, and belongs to the technical field of dehydration of sludge, coal slime, food and the like.

Description

Technical Field

[0001] This utility model relates to the field of dewatering technology for sludge, coal slime, food, etc., and specifically to a device for continuously folding and pressing sludge with a filter cloth in multiple positions. Background Technology

[0002] With the rapid development of my country's economy, people's quality of life has steadily improved, and urbanization has become increasingly sophisticated. However, against the backdrop of rapid urbanization, human activities have placed a significant environmental burden on cities. The number of urban sewage treatment plants has increased to over 3,000, generating massive amounts of sludge during wastewater treatment. Statistics show that in 2021, my country's municipal sludge production exceeded 55.52 million tons, and the output continues to increase annually. Faced with this massive amount of sludge, my country's current sludge disposal methods mainly involve mechanical dewatering and drying to achieve deep dewatering before treatment. However, mechanical dewatering is limited in that it is difficult to reduce the sludge moisture content to below 40% in one step. Energy-intensive drying methods consume large amounts of energy and produce environmentally unfriendly gases that require treatment, making it a high-cost disposal method.

[0003] Existing mechanical dewatering methods mainly rely on plate and frame and belt dewatering, which struggle to achieve a sludge moisture content of 40%. In recent years, multi-layer pleated filter presses have emerged in the industry. These methods involve distributing sludge onto filter cloth, then using a pleating system to further distribute it within a frame. Hydraulic components then press the folded sludge within the frame to reduce its moisture content. However, this method has several drawbacks: 1. Uneven sludge distribution during cloth application can lead to gaps and collapse during the pleating process; 2. Wrinkles easily form on the filter cloth during cloth application, requiring manual correction; 3. Uneven sludge thickness can result in uneven pressure, affecting localized dewatering efficiency; 4. The unloading process involves wrapping the filter cloth around rollers, and pulling it out during cloth application consumes significant time; 5. Intermittent operation of the filter cloth consumes considerable labor and time, resulting in high costs. Therefore, in the existing multi-layer pleated filter press dewatering method, the phenomena exhibited are that the sludge distribution and dewatering effect are not ideal, and automation is difficult. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the purpose of this utility model is to provide a device for continuous back-and-forth folding and pressing of filter cloth to filter sludge, which can realize the continuous back-and-forth folding of filter cloth in two folding systems to continuously process sludge.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for continuously reciprocating multi-position folding and pressing sludge with filter cloth includes a feeding system, a pre-compression system, a folding system, a pressing system, and a cleaning system;

[0007] The feeding system, pre-compression system, and folding system are distributed from the inside out to form a sludge pretreatment system. There are at least two sludge pretreatment systems, and each pair of sludge pretreatment systems is symmetrically distributed to form a folding unit.

[0008] The two sludge pretreatment systems in each folded unit are connected by a continuous filter cloth, and the pre-compression system and folding system of each sludge pretreatment system are connected to the filter cloth. The feeding system is located above the filter cloth; there are two filter press systems.

[0009] The two filter press systems correspond to the two pleated systems of the pleated unit, respectively.

[0010] The cleaning system can clean the filter cloth continuously.

[0011] As a preferred embodiment, the filter cloth includes an upper continuous filter cloth and a lower continuous filter cloth. In two symmetrical sludge pretreatment systems, the upper continuous filter cloth is connected to the upper pressing component and folding system of the pre-compression system of the two sludge pretreatment systems, and the lower continuous filter cloth is connected to the lower pressing component and folding system of the pre-compression system of the two sludge pretreatment systems. The lower continuous filter cloth between the lower pressing components of the pre-compression system of the two sludge pretreatment systems is located below the feeding system, and the upper continuous filter cloth between the upper pressing components of the pre-compression system of the two sludge pretreatment systems is located above the feeding system.

[0012] As a preferred embodiment, when the number of folding units is two or more, the filter press system has filter press positions, the number of filter press positions is the same as the number of folding units, and each filter press position corresponds to the folding system of the folding unit. When the number of filter press positions is ≥2, the filter press workpiece of the filter press system can move between the filter press position and the filter to be pressed position.

[0013] As a preferred embodiment, the filter press frame of the filter press system is movable between the filter press position and the folding area of ​​the folding system.

[0014] As a preferred embodiment, the cleaning system is located on both sides of the folding unit. The cleaning system has a traction roller shaft for pulling the filter cloth, and a water gun is located above the traction roller shaft for rinsing the filter cloth.

[0015] As a preferred embodiment, the device also includes a discharge system, which comprises an upper discharge module and a lower discharge module, with two upper discharge modules and two lower discharge modules. The two upper discharge modules are symmetrically arranged between the pre-compression systems of the two sludge pretreatment systems, and the two lower discharge modules are symmetrically arranged between the feeding systems of the two sludge pretreatment systems.

[0016] As a preferred embodiment, the upper unloading module includes two first tensioning rollers, which are staggered in the vertical direction. The upper continuous filter cloth is sequentially wound around the two first tensioning rollers. The portion of the upper continuous filter cloth wound around the two first tensioning rollers is a first inclined filter cloth segment, and the portion of the upper continuous filter cloth connected to the pre-compression system is a first horizontal filter cloth segment. An angle is formed between the first horizontal filter cloth segment and the first inclined filter cloth segment, and the first inclined filter cloth segment is inclined outward and upward from the first horizontal filter cloth segment.

[0017] As a preferred embodiment, the unloading module includes two second tension rollers, which are staggered in the vertical direction. The lower continuous filter cloth is sequentially wound around the two second tension rollers. The portion of the lower continuous filter cloth wound around the two second tension rollers is a second inclined filter cloth segment, and the portion of the lower continuous filter cloth connected to the feeding system is a second horizontal filter cloth segment. An angle is formed between the second horizontal filter cloth segment and the second inclined filter cloth segment, and the second inclined filter cloth segment is inclined inward and downward from the second horizontal filter cloth segment.

[0018] As a preferred embodiment, the side of the folding system away from the filter press system is provided with a pusher, which is connected to the filter press frame of the filter press system to drive the filter press frame to move between the filter press position and the folding area of ​​the folding system.

[0019] As a preferred embodiment, the distance between the upper and lower pressure components of the pre-compression system can be adjusted.

[0020] In summary, this utility model has the following advantages:

[0021] The device of this invention enables the continuous folding of filter cloth in two folding systems to continuously process sludge, shortening the time required for multiple folding and pressing of sludge, and improving the dewatering dryness and yield of the material. Attached Figure Description

[0022] Figure 1 This is a front view of a device for continuously reciprocating multi-folded filter cloth to filter sludge.

[0023] Figure 2 This is the front view of the device in the first specific application example.

[0024] Figure 3 This is a top view of the device in the first specific application example.

[0025] Figure 4 This is the left view of the device in the first specific application example.

[0026] Figure 5 This is a front view of the device in Specific Application Example 1, which illustrates the positional relationship of the filter press frames in the filter press system.

[0027] Figure 6 for Figure 5 A top view of the device shown.

[0028] Figure 7 This is a top view of the device in the third specific application example.

[0029] Among them, 1 is the filter press system, 11 is the filter press frame, 12 is the filter press position, 2 is the folding system, 3 is the pre-compression system, 4 is the feeding system, 5 is the cleaning system, 6 is the unloading system, 61 is the lower unloading module, 611 is the second horizontal filter cloth section, 612 is the second inclined filter cloth section, 62 is the upper unloading module, 621 is the first horizontal filter cloth section, 622 is the first inclined filter cloth section, and 7 is the filter cloth. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to specific embodiments.

[0031] like Figure 1 As shown in the figure, the device for continuous reciprocating multi-folded filter cloth for pressing sludge provided in this embodiment includes a feeding system 4, a pre-compression system 3, a folding system 2, a filter pressing system 1, and a cleaning system 5;

[0032] The feeding system 4, the pre-compression system 3, and the folding system 2 are distributed from the inside out to form a sludge pretreatment system. There are at least two sludge pretreatment systems, and each pair of sludge pretreatment systems is symmetrically distributed to form a folding unit.

[0033] The two sludge pretreatment systems of each folded unit are connected by a continuous filter cloth, and the pre-compression system 3 and folding system 2 of each sludge pretreatment system are connected to the filter cloth. The feeding system 4 is located above the filter cloth; there are two filter press systems 1.

[0034] The two filter press systems 1 correspond to the two folding systems 2 of the folding unit, respectively;

[0035] The cleaning system 5 is capable of cleaning the continuous filter cloth.

[0036] The filter cloth includes an upper continuous filter cloth and a lower continuous filter cloth. In two symmetrical sludge pretreatment systems, the upper continuous filter cloth is connected to the upper pressing component and folding system 2 of the pre-compression system 3 of the two sludge pretreatment systems, and the lower continuous filter cloth is connected to the lower pressing component and folding system 2 of the pre-compression system 3 of the two sludge pretreatment systems. The lower continuous filter cloth between the lower pressing components of the pre-compression system 3 of the two sludge pretreatment systems is located below the feeding system 4, and the upper continuous filter cloth between the upper pressing components of the pre-compression system 3 of the two sludge pretreatment systems is located above the feeding system 4.

[0037] When the number of folding units is two or more, the filter press system 1 has a filter press position 12. The number of filter press positions 12 is the same as the number of folding units. Each filter press position 12 corresponds to the folding system 2 of the folding unit. When the number of filter press positions 12 is ≥2, the filter press workpiece of the filter press system 1 can move between the filter press position 12 and the filter position to be pressed 12.

[0038] The filter press frame 11 of the filter press system 1 can move between the filter press position 12 and the folding area of ​​the folding system 2.

[0039] The cleaning system 5 is located on both sides of the folding unit. The cleaning system 5 has a traction roller shaft for pulling the filter cloth, and a water gun is located above the traction roller shaft for rinsing the filter cloth.

[0040] The device also includes a discharge system 6, which includes an upper discharge module 62 and a lower discharge module 61. There are two upper discharge modules 62 and two lower discharge modules 61. The two upper discharge modules 62 are symmetrically arranged between the pre-compression systems 3 of the two sludge pretreatment systems, and the two lower discharge modules 61 are symmetrically arranged between the feeding systems 4 of the two sludge pretreatment systems.

[0041] The upper unloading module 62 includes two first tensioning rollers, which are staggered in the vertical direction. The upper continuous filter cloth is wound around the two first tensioning rollers in sequence. The part of the upper continuous filter cloth wound around the two first tensioning rollers is the first inclined filter cloth section 622, and the part of the upper continuous filter cloth connected to the pre-compression system 3 is the first horizontal filter cloth section 621. The first horizontal filter cloth section 621 and the first inclined filter cloth section 622 form an angle, and the first inclined filter cloth section 622 is inclined outward and upward from the first horizontal filter cloth section 621.

[0042] The unloading module 61 includes two second tension rollers, which are staggered in the vertical direction. The lower continuous filter cloth is wound around the two second tension rollers in sequence. The part of the lower continuous filter cloth wound around the two second tension rollers is the second inclined filter cloth section 612, and the part of the lower continuous filter cloth connected to the feeding system 4 is the second horizontal filter cloth section 611. The second horizontal filter cloth section 611 and the second inclined filter cloth section 612 form an angle, and the second inclined filter cloth section 612 is inclined inward and downward from the second horizontal filter cloth section 611.

[0043] The folding system 2 has a pusher on the side away from the filter press system 1. The pusher is connected to the filter press frame 11 of the filter press system 1 to drive the filter press frame 11 to move between the filter press position 12 and the folding area of ​​the folding system 2.

[0044] The distance between the upper and lower pressure components of the pre-compression system 3 is adjustable.

[0045] The aforementioned feeding system 4, pre-compression system 3, folding system 2, washing system 5, filter press system 1, and unloading system 6 are all existing equipment used in sludge treatment. They respectively enable sludge to be fed onto a continuous filter cloth 7, the pre-compression system to pre-compress the sludge on the filter cloth 7, the folding system to fold the filter cloth 7 and the sludge on it, the filter press system to press the folded sludge cake, and the unloading system to unload the pressed sludge cake from the filter cloth 7. In this embodiment, the feeding system 4 is a double-roller slitter. The gap of the slitter is adjusted to cut the incoming sludge into thin strips, which are evenly distributed on the filter cloth. Pre-compression… System 3 uses a tracked dewatering unit of a stepped pressurized deep dewatering machine, which utilizes the advantage of preset angles to control the thickness of the incoming sludge and the uniformity of its distribution on the filter cloth; Folding system 2 uses the working characteristics of a servo motor to fix the filter cloth on the folding system, and through the servo motor drive, the filter cloth moves back and forth within a preset width; Cleaning system 5 uses a high-pressure pump to spray water evenly onto the filter cloth, so that the filter cloth is cleaned before feeding; Filter press system 1 uses a hydraulic cylinder to apply sufficient pressure to the folded sludge; Unloading system 6 uses a scraper to scrape the sludge off the filter cloth as it passes the scraper.

[0046] The apparatus described in the above embodiments uses a feeding system to cut the incoming sludge into thin strips and distribute them evenly on the filter cloth, solving the problems of uneven sludge distribution during cloth application and the potential for gaps and collapse during the folding process. 2. The folding system pulls the continuous filter cloth, ensuring it remains taut and preventing wrinkles during the cloth application stage, eliminating the need for manual correction. 3. Adjusting the upper and lower pressing components of the pre-compression system addresses the issue of uneven sludge thickness leading to uneven pressure and affecting localized sludge dewatering. 4. The unloading system solves the problem of the filter cloth being wrapped around the rollers during unloading and then pulled out during cloth application, resulting in significant time consumption. 5. The folding unit, in conjunction with the filter press system, solves the problem of intermittent filter cloth operation, which consumes considerable labor and time, leading to high costs.

[0047] Specific application example 1:

[0048] like Figure 2-5 As shown, taking three sets of folded units as an example, the three sets of folded units are arranged side by side, with two filter press systems 1 on both sides of the three sets of folded units respectively. Each filter press system 1 has three filter press positions 12, as shown. Figures 3-4 As shown, Figure 3 The three filter press positions on the left are the first frame position, the second frame position, and the third frame position, respectively. Figure 2 The filter press system 1 on the left is the left press. Figure 2 The three filter press positions 12 on the right are the first frame position, the second frame position, and the third frame position from the right, respectively. Figure 3 The system on the right is the right-side press; its operation is as follows:

[0049] 1. The sludge is distributed on the lower filter cloth 7 through the feeding system 4, and the upper and lower filter cloths 7 begin to pre-compress the sludge as the pre-compressing system 3 moves;

[0050] 2. The relative height of the feed end of the pre-compression system 3 is lower than that of the discharge end. The sludge is pre-compressed by the upper and lower continuous filter cloths after passing through the pre-compression system 3, which can make the sludge achieve a uniform thickness.

[0051] 3. The sludge filtered by the pre-compression system 3 is folded by the reciprocating motion of the folding system 2 to fold the filter cloth 7. The filter press frame 11 lifts the load-bearing plate to a state close to the frame surface through the lifting device. As the number of layers of sludge increases by the folding system 2, the lifting device gradually moves the load-bearing plate downward until the folding system 2 folds the sludge to the preset height or the pre-made length of filter cloth 7 and then stops working.

[0052] 4. After the first sludge pretreatment system of each group folds the sludge into the filter press frame 11, the folding system 2 is moved to a position where it does not interfere with the filter press system 1, and the filter press system 1 begins to apply pressure to the multiple layers of sludge in the filter press frame 11.

[0053] Taking a 30-minute filter press process as an example, the sludge is folded and transferred to the left filter press area after the first left frame is folded. The left filter press starts working and is counted as 0 minutes. At this time, the filter cloth 7 in the second left frame is pulled and conveyed to the second right frame. At 15 minutes, the sludge is laid, pre-compressed, and folded. Simultaneously, the right filter press performs filter pressing on the second right frame. Between 16 and 30 minutes, the filter cloth 7 in the third right frame is pulled and conveyed to the third left frame. At 30 minutes, the sludge is laid, pre-compressed, and folded. When the cumulative time reaches 30 minutes, the filter pressing of the first left frame is complete. The left filter press corresponding to the first left frame then moves to the third left frame at that time to perform filter pressing. During the period from 31 to 45 minutes, the filter cloth 7 in the leftmost frame carries the pressed sludge to the rightmost frame. This process includes unloading, spreading, pre-compression, and folding. At the 45th minute, the rightmost frame completes spreading, pre-compression, and folding. At this time, the second frame from the right has completed 30 minutes of pressing, and the right press moves to the rightmost frame to perform filtration. Meanwhile, the filter cloth 7 in the second frame from the right carries the pressed sludge to the second frame from the left during the period from 46 to 60 minutes. This process includes unloading, spreading, pre-compression, and folding. At the 60th minute, the second frame from the left completes unloading, spreading, pre-compression, and folding, and the third frame from the left has completed 30 minutes of filtration. The left press then moves to the second frame from the left to perform filtration. These six frames switch states for two frames every 15 minutes, achieving continuous operation.

[0054] Similarly, during the period from 61 to 75 minutes, the filter cloth 7 in the left third frame carries the pressed sludge to the right third frame for unloading, spreading, pre-pressing, and folding. By the 75th minute, the right third frame is folded and the right first frame is pressed for 30 minutes. Then, the right press moves to the right third frame and performs filtration. At this time, the right first frame begins unloading, spreading, pre-pressing, and folding from the 76th minute to the left first frame. By the 90th minute, the left first frame is folded and the left second frame is filtration completed. The left press moves to the left third frame. The first frame on the left moves and performs filtration; from 91 to 105 minutes, the second frame on the left moves to the second frame on the right for unloading, spreading, pre-pressing, and folding. At 105 minutes, the second frame on the right completes folding, the third frame on the right completes filtration, and the right press moves to the second frame on the right to perform filtration; the third frame on the right, having completed filtration, moves to the third frame on the left, going through unloading, spreading, pre-pressing, and folding. At 120 minutes, the third frame completes folding, the first frame on the left completes filtration, and the left press moves to the third frame on the left to perform filtration.

[0055] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0056] Specific application example two:

[0057] Taking four sets of folded units as an example, the four sets of folded units are arranged side by side. Two filter press systems 1 are located on either side of the four sets of folded units. Each filter press system 1 has four filter press positions 12. One filter press system 1 has four filter press positions 12, namely the first left frame, the second left frame, the third left frame, and the fourth left frame; this filter press system 1 is the left press. The other filter press system 1 has four filter press positions 12, namely the first right frame, the second right frame, the third right frame, and the fourth right frame; this filter press system 1 is the right press. The working process is as follows:

[0058] 1. The sludge is distributed on the lower filter cloth 7 through the feeding system 4, and the upper and lower filter cloths 7 begin to pre-compress the sludge as the pre-compressing system 3 moves;

[0059] 2. The relative height of the feed end of the pre-compression system 3 is lower than that of the discharge end. The sludge is pre-compressed by the upper and lower continuous filter cloths after passing through the pre-compression system 3, which can make the sludge achieve a uniform thickness.

[0060] 3. The sludge filtered by the pre-compression system 3 is folded by the reciprocating motion of the folding system 2 to fold the filter cloth 7. The filter press frame 11 lifts the load-bearing plate to a state close to the frame surface through the lifting device. As the number of layers of sludge increases by the folding system 2, the lifting device gradually moves the load-bearing plate downward until the folding system 2 folds the sludge to the preset height or the pre-made length of filter cloth 7 and then stops working.

[0061] 4. After the first sludge pretreatment system of each group folds the sludge into the filter press frame 11, the folding system 2 is moved to a position where it does not interfere with the filter press system 1, and the filter press system 1 begins to apply pressure to the multiple layers of sludge in the filter press frame 11.

[0062] Taking a 30-minute filter press process as an example, the left and right presses initially act on the first left frame and the fourth right frame, respectively. During the 0-30 minute period, the filter cloth 7 in the second right frame and the third left frame moves simultaneously to the second left frame and the third right frame, respectively. During this process, steps such as unloading, spreading, pre-pressing, and folding are performed. At the 31-minute mark, the left press moves from the first left frame to the second left frame, and the right press moves from the fourth right frame to the third right frame, continuing the filter press dewatering process. Meanwhile, during the period from 31 to 60 minutes, the filter cloths 7 containing sludge in the left first frame and right fourth frame, respectively, move to the left fourth frame and right first frame, respectively. After unloading, spreading, pre-compression, and folding, at 61 minutes, the left press moves to the left fourth frame and the right press moves to the right first frame to continue filtration and dewatering. At this time, the filter cloths 7 containing sludge in the left second frame and right third frame move to the left third frame and right second frame, respectively. After unloading, spreading, pre-compression, and folding, at 91 minutes, the left and right presses act on the left third frame and right second frame, respectively, to achieve filtration and dewatering. At the same time, the filter cloths 7 containing sludge in the right first frame and left fourth frame move to the left first frame and right fourth frame, respectively. After unloading, spreading, pre-compression, and folding, the left and right presses act on these two frames again, achieving continuous cyclic filtration.

[0063] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0064] Specific application example three:

[0065] like Figure 7 As shown, taking a set of folded units as an example, the two filter press systems 1 paired with the folded unit are located on both sides of the folded unit. The filter press position 12 of each filter press system 1 is fixed, denoted as the left frame position, and this filter press system 1 is the left press. The other filter press system 1 is denoted as the right frame position, and the other filter press system 1 is the right press. The working process is as follows:

[0066] 1. The sludge is distributed on the lower filter cloth 7 through the feeding system 4, and the upper and lower filter cloths 7 begin to pre-compress the sludge as the pre-compressing system 3 moves;

[0067] 2. The relative height of the feed end of the pre-compression system 3 is lower than that of the discharge end. The sludge is pre-compressed by the upper and lower continuous filter cloths after passing through the pre-compression system 3, which can make the sludge achieve a uniform thickness.

[0068] 3. The sludge filtered by the pre-compression system 3 is folded by the reciprocating motion of the folding system 2 to fold the filter cloth 7. The filter press frame 11 lifts the load-bearing plate to a state close to the frame surface through the lifting device. As the number of layers of sludge increases by the folding system 2, the lifting device gradually moves the load-bearing plate downward until the folding system 2 folds the sludge to the preset height or the pre-made length of filter cloth 7 and then stops working.

[0069] 4. After the sludge is folded into the filter press frame 11 by the sludge pretreatment system, the folding system 2 is moved to a position where it does not interfere with the filter press system 1, and the filter press system 1 begins to apply pressure to the multiple layers of sludge in the filter press frame 11.

[0070] Taking a 30-minute filter press process as an example, filter press system 1 begins to press the folded sludge within filter press frame 11. After 30 minutes, the left press stops working. At this time, the sludge that has been pressed dry within filter press frame 11 undergoes unloading, spreading, pre-compression, and folding processes through the sludge pretreatment system. Meanwhile, the folded sludge in the other filter press frame 11 is filtered by the right press, while the left press remains in standby mode. This method achieves simultaneous unloading and spreading of sludge.

[0071] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0072] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A device for continuously reciprocating multi-position folding and pressing sludge with filter cloth, characterized in that: This includes a feeding system, a pre-compression system, a pleating system, a filter press system, and a cleaning system; The feeding system, pre-compression system, and folding system are distributed from the inside out to form a sludge pretreatment system. There are at least two sludge pretreatment systems, and each pair of sludge pretreatment systems is symmetrically distributed to form a folding unit. The two sludge pretreatment systems in each folded unit are connected by a continuous filter cloth, and the pre-compression system and folding system of each sludge pretreatment system are connected to the filter cloth. The feeding system is located above the filter cloth; there are two filter press systems. The two filter press systems correspond to the two pleated systems of the pleated unit, respectively. The cleaning system can clean the filter cloth continuously.

2. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 1, characterized in that: The filter cloth includes an upper continuous filter cloth and a lower continuous filter cloth. In two symmetrical sludge pretreatment systems, the upper continuous filter cloth is connected to the upper pressing component and folding system of the pre-compression system of the two sludge pretreatment systems, and the lower continuous filter cloth is connected to the lower pressing component and folding system of the pre-compression system of the two sludge pretreatment systems. The lower continuous filter cloth between the lower pressing components of the pre-compression system of the two sludge pretreatment systems is located below the feeding system, and the upper continuous filter cloth between the upper pressing components of the pre-compression system of the two sludge pretreatment systems is located above the feeding system.

3. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 1, characterized in that: When the number of folding units is two or more, the filter press system has filter press positions. The number of filter press positions is the same as the number of folding units. Each filter press position corresponds to the folding system of the folding unit. When the number of filter press positions is ≥2, the filter press workpiece of the filter press system can move between the filter press position and the filter to be pressed position.

4. The apparatus for continuous reciprocating multi-position folding and pressing sludge with filter cloth according to claim 3, characterized in that: The filter press frame of the filter press system can move between the filter press position and the folded area of ​​the folded system.

5. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 1, characterized in that: The cleaning system is located on both sides of the folding unit. The cleaning system has a traction roller shaft for pulling the filter cloth, and a water gun is located above the traction roller shaft for rinsing the filter cloth.

6. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 2, characterized in that: It also includes a discharge system, which consists of an upper discharge module and a lower discharge module. There are two upper discharge modules and two lower discharge modules. The two upper discharge modules are symmetrically arranged between the pre-compression systems of the two sludge pretreatment systems, and the two lower discharge modules are symmetrically arranged between the feeding systems of the two sludge pretreatment systems.

7. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 6, characterized in that: The upper unloading module includes two first tension rollers, which are staggered in the vertical direction. The upper continuous filter cloth is wound around the two first tension rollers in sequence. The part of the upper continuous filter cloth wound around the two first tension rollers is a first inclined filter cloth section, and the part of the upper continuous filter cloth connected to the pre-compression system is a first horizontal filter cloth section. An angle is formed between the first horizontal filter cloth section and the first inclined filter cloth section, and the first inclined filter cloth section is inclined outward and upward from the first horizontal filter cloth section.

8. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 6, characterized in that: The unloading module includes two second tension rollers, which are staggered in the vertical direction. The lower continuous filter cloth is wound around the two second tension rollers in sequence. The part of the lower continuous filter cloth wound around the two second tension rollers is the second inclined filter cloth section, and the part of the lower continuous filter cloth connected to the feeding system is the second horizontal filter cloth section. The second horizontal filter cloth section and the second inclined filter cloth section form an angle, and the second inclined filter cloth section is inclined inward and downward from the second horizontal filter cloth section.

9. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 4, characterized in that: A pusher is provided on the side of the folding system away from the filter press system. The pusher is connected to the filter press frame of the filter press system to drive the filter press frame to move between the filter press position and the folding area of ​​the folding system.

10. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 1, characterized in that: The distance between the upper and lower pressure components of the pre-compression system is adjustable.

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