Method and device for continuous back-and-forth multi-position folding and pressure filtration of sludge with filter cloth

Abstract

The present application relates to a kind of filter cloth continuous round trip multi-site folding filter sludge method and device, comprising the following steps: with two folding systems and continuous filter cloth as a folding unit, in each folding unit, by the continuous filter cloth between two folding systems round trip folding, so that sludge is folded into folded cake, and the folded cake is filtered by filter pressing system to obtain filter pressing cake;Wherein, when the filter pressing cake on filter cloth is unloaded, sludge is simultaneously arranged on filter cloth.The method of the present application can realize the continuous filter cloth round trip folding between two folding systems, the process of continuously treating sludge, belongs to the dehydration technical field of sludge, coal slime, food and the like.

Description

Technical Field

[0001] This invention relates to the field of dewatering technology for sludge, coal slime, food, etc., and specifically to a method and apparatus 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. Currently, sludge production continues to increase year by year. Faced with this massive amount of sludge, my country's current sludge disposal methods mainly involve mechanical dewatering combined with 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. Summary of the Invention

[0004] In view of the technical problems existing in the prior art, the purpose of the present invention is to provide a method and apparatus for continuous back-and-forth multi-position 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 method for continuously folding and pressing sludge with a filter cloth includes the following steps: using two folding systems and a continuous filter cloth as a folding unit, in each folding unit, the continuous filter cloth is folded back and forth between the two folding systems to fold the sludge into a folded sludge cake, and the folded sludge cake is pressed and filtered by a pressing system to obtain a pressed sludge cake; wherein, when unloading the pressed sludge cake on the filter cloth, sludge is simultaneously laid onto the filter cloth.

[0007] As a preferred embodiment, in each set of folding units, a pre-compression system and a feeding system are symmetrically distributed from the outside to the inside between the two folding systems. The feeding system is used to transport sludge to the continuous filter cloth, and the pre-compression system is used to pre-compress the filter cloth and sludge that travel back and forth between the two folding systems.

[0008] As a preferred method, the sludge is pre-compressed and folded into folded sludge cakes as follows: the sludge is first fed from the feeding system into a continuous filter cloth and conveyed through the pre-compressing system for pre-compression. After pre-compression, it is further conveyed to the folding system, where the folding system folds the sludge to obtain folded sludge cakes.

[0009] As a preferred method, the method for obtaining filter cake by pressure filtration of folded mud cake is as follows: the folded mud cake is transported to the filter press frame of the filter press system, the filter press frame moves towards the filter press position, and pressure is applied to the folded mud cake to obtain filter cake.

[0010] As a preferred embodiment, when the number of folding units is two or more, the number of filter press systems is two, with the two or more folding units arranged side by side and the filter press systems distributed on both sides of the two or more folding units, corresponding to the folding systems of the two or more folding units; wherein, each filter press system has the same number of filter press positions as the number of folding units, and the filter press workpiece of each filter press system can move at the filter press position.

[0011] An apparatus for continuously reciprocating multi-position pleated filter cloth for sludge pressing, the apparatus being applied to a method comprising a feeding system, a pre-compression system, a pleating system, a pressing system, and a discharging system;

[0012] The sludge pretreatment system is composed of a discharge system, a feed system, a pre-compression system, and a folding system connected in sequence.

[0013] The number of sludge pretreatment systems must be at least two;

[0014] Two sludge pretreatment systems are symmetrically distributed to form a folded unit;

[0015] There are two filter press systems, each corresponding to one of the two pleated systems of the pleated unit.

[0016] 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, each filter press position corresponds to the folding system of the folding unit, and the filter press workpiece of the filter press system can move between the filter press position and the filter to be pressed position.

[0017] As a preferred embodiment, the distance between the upper and lower pressure components of the pre-compression system can be adjusted.

[0018] As a preferred embodiment, during the movement of sludge from one folding system to another in the folding unit, the sludge in the filter cloth is detached after passing through the unloading system. After unloading, the filter cloth is fed through the feeding system downstream of the unloading system, and after carrying the sludge, it enters the pre-compression system and the folding system.

[0019] As a preferred option, the pre-compression system serves as a pretreatment device for sludge, subjecting the sludge to low-pressure treatment so that the sludge is evenly distributed between the two layers of filter cloth.

[0020] In summary, the present invention has the following advantages:

[0021] The present invention provides a method and apparatus for continuous back-and-forth multi-folding and pressing of filter cloth to filter sludge. This method enables the filter cloth to be continuously folded back and forth between two folding systems, achieving simultaneous unloading and feeding of the filter cloth, and continuously processing the sludge. This shortens the time required for multiple folding and pressing of sludge, and improves the dewatering dryness and yield of the material. Attached Figure Description

[0022] Figure 1 This is the front view of the device in the first specific application example.

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

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

[0025] Figure 4 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.

[0026] Figure 5 for Figure 4 A top view of the device shown.

[0027] Figure 6 This is a top view of the device in the third specific application example.

[0028] 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, and 7 is the filter cloth. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to specific embodiments.

[0030] Example 1;

[0031] This embodiment provides a method for continuous back-and-forth multi-position folding and pressing sludge with filter cloth, including the following steps: taking two folding systems 2 and a continuous filter cloth 7 as a folding unit, in each folding unit, the continuous filter cloth 7 is folded back and forth between the two folding systems 2 to fold the sludge into a folded sludge cake, and the folded sludge cake is pressed and filtered by the pressing system 1 to obtain a pressed sludge cake; wherein, when the pressed sludge cake on the filter cloth 7 is unloaded, sludge is simultaneously laid on the filter cloth 7.

[0032] In each set of folding units, a pre-compression system 3 and a feeding system 4 are symmetrically distributed from the outside to the inside between the two folding systems 2. The feeding system 4 is used to transport sludge to the continuous filter cloth 7, and the pre-compression system 3 is used to pre-compress the filter cloth 7 and the sludge that travel back and forth between the two folding systems 2.

[0033] The method for pre-compressing and folding sludge into folded sludge cakes is as follows: First, the sludge is fed from the feeding system 4 into the continuous filter cloth 7 and conveyed through the pre-compressing system 3 for pre-compression. After pre-compression, it is conveyed to the folding system 2, where the folding system 2 folds the sludge to obtain folded sludge cakes.

[0034] The method for obtaining filter cake by pressing folded mud cake is as follows: the folded mud cake is transported to the filter press frame 11 of the filter press system 1, the filter press frame 11 moves towards the filter press position 12, and pressure is applied to the folded mud cake to obtain filter cake.

[0035] When the number of folding units is two or more, the number of filter press systems 1 is two. The two or more folding units are arranged side by side, and the filter press systems 1 are distributed on both sides of the two or more folding units, corresponding to the folding systems 2 of the two or more folding units. Each filter press system 1 has the same number of filter press positions 12 as the number of folding units, and the filter press workpiece of each filter press system 1 can move at the filter press position 12.

[0036] The method provided in this embodiment can be used to treat sludge, enabling continuous folding of the filter cloth 7 in two folding systems 2 to continuously treat the sludge.

[0037] Example 2;

[0038] like Figures 1-5 As shown in the figure, this embodiment provides a device for continuous reciprocating multi-position folding and pressing sludge with filter cloth. The device is applied to the method and includes a feeding system 4, a pre-compression system 3, a folding system 2, a pressing system 1, and a discharge system 6.

[0039] The sludge pretreatment system is formed by connecting a discharge system 6, a feeding system 4, a precompression system 3 and a folding system 2 in sequence.

[0040] The number of sludge pretreatment systems must be at least two;

[0041] Two sludge pretreatment systems are symmetrically distributed to form a folded unit;

[0042] There are two filter press systems 1, and the two filter press systems 1 correspond to the two folding systems 2 of the folding unit.

[0043] 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. The filter press workpiece of the filter press system 1 can move between the filter press position 12 and the filter press position 12 to be pressed. The filter cloth folded by the folding system is located in the filter press frame of the filter press system. The filter press frame of the filter press system can move between the folding system and the filter press position.

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

[0045] During the movement of sludge from one folding system to another in the folding unit, the sludge in the filter cloth is detached after passing through the unloading system. After unloading, the filter cloth is fed by the feeding system downstream of the unloading system, and after carrying the sludge, it enters the pre-compression system and the folding system.

[0046] The pre-compression system, as a pretreatment device for sludge, performs low-pressure treatment on the sludge, so that the sludge is evenly distributed between the two layers of filter cloth.

[0047] The device also includes a cleaning system 5, which is located downstream of the unloading system 6. After the unloading system 6 unloads the sludge from the filter cloth 7, it pulls the filter cloth 7 to the cleaning system 5 to clean the filter cloth 7, and then the next round of sludge feeding, pre-compression and folding work is carried out.

[0048] 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 feeding onto filter cloth 7, pre-compression of the sludge on filter cloth 7, folding of filter cloth 7 and the sludge on filter cloth 7, filter pressing of the folded sludge cake, and unloading of the filtered sludge cake from filter cloth 7. Since these are all existing devices, 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. The pre-compression system 3 uses… The tracked dewatering unit of the stepped pressurized deep dewatering machine utilizes its preset angle advantage to control the thickness of the incoming sludge and the uniformity of its distribution on the filter cloth; the 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; the cleaning system 5 uses a high-pressure pump to evenly spray water onto the filter cloth, so that the filter cloth is cleaned before feeding; the filter press system 1 uses a hydraulic cylinder to apply sufficient pressure to the folded sludge; the unloading system 6 uses a scraper to scrape the sludge off the filter cloth as it passes the scraper.

[0049] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0050] Specific application example 1:

[0051] like Figure 1-5 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. Each filter press system 1 has three filter press positions 12, as shown. Figures 2-3 As shown, Figure 2 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 compressor. 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 2 The system on the right is the right-side press; its operation is as follows:

[0052] 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;

[0053] 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 filter cloths 7 after passing through the pre-compression system 3, which can make the sludge achieve a uniform thickness.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] The parts not mentioned in this embodiment are the same as in Embodiment 2.

[0059] Specific application example two:

[0060] 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:

[0061] 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;

[0062] 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 filter cloths 7 after passing through the pre-compression system 3, which can make the sludge achieve a uniform thickness.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] The parts not mentioned in this embodiment are the same as in Embodiment 2.

[0067] Specific application example three:

[0068] like Figure 6 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:

[0069] 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;

[0070] 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 filter cloths 7 after passing through the pre-compression system 3, which can make the sludge achieve a uniform thickness.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] The parts not mentioned in this embodiment are the same as in Embodiment 2.

[0075] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention 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 invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for continuously folding and pressing sludge by a filter cloth reciprocating multi-position folding press, characterized in that, The process includes the following steps: using two folding systems and a continuous filter cloth as a folding unit, in each folding unit, the continuous filter cloth is folded back and forth between the two folding systems to fold the sludge into a folded sludge cake, and the folded sludge cake is pressed by a filter press system to obtain a filter cake; wherein, when the filter cake on the filter cloth is unloaded, the sludge is simultaneously laid on the filter cloth.

2. A method of continuously reciprocating multi-position folding and pressure filtering sludge with filter cloth according to claim 1, characterized in that, In each set of folding units, a pre-compression system and a feeding system are symmetrically distributed from the outside to the inside between the two folding systems. The feeding system is used to transport sludge to the continuous filter cloth, and the pre-compression system is used to pre-compress the filter cloth and sludge that are moving back and forth between the two folding systems.

3. The method for continuous reciprocating multi-position folding and pressing sludge with filter cloth according to claim 2, characterized in that, The method for pre-compressing and folding sludge into folded sludge cakes is as follows: First, the sludge is fed from the feeding system into a continuous filter cloth and conveyed through the pre-compressing system for pre-compression. After pre-compression, it is conveyed to the folding system, where the folding system folds the sludge to obtain folded sludge cakes.

4. The method for continuous reciprocating multi-position folding and pressing of filter cloth to filter sludge according to claim 2, characterized in that, The method for obtaining filter cake by pressure filtration of folded mud cake is as follows: the folded mud cake is transported to the filter press frame of the filter press system, the filter press frame moves towards the filter press position, and pressure is applied to the folded mud cake to obtain filter cake.

5. A method for continuously reciprocating multi-position folding and pressing sludge with a filter cloth according to claim 1, characterized in that, When there are two or more sets of folding units, there are two filter press systems. The two or more sets of folding units are arranged side by side, and the filter press systems are distributed on both sides of the two or more sets of folding units, corresponding to the folding system of the two or more sets of folding units. Each filter press system has the same number of filter press positions as the number of folding units, and the filter press workpiece of each filter press system can move at the filter press position.

6. A device for continuously reciprocating multi-position folding and pressing sludge with filter cloth, the device being used in the method described in any one of claims 1-5, characterized in that, It includes a feeding system, a pre-compression system, a pleating system, a filter press system, and a discharge system; The sludge pretreatment system is composed of a discharge system, a feed system, a pre-compression system, and a folding system connected in sequence. The number of sludge pretreatment systems must be at least two; Two sludge pretreatment systems are symmetrically distributed to form a folded unit; There are two filter press systems, each corresponding to one of the two pleated systems of the pleated unit.

7. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 6, characterized in that, When there are two or more sets of folding units, 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. The filter press workpiece of the filter press system can move between the filter press position and the filter to be pressed position.

8. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 6, characterized in that, The distance between the upper and lower pressure components of the pre-compression system is adjustable.

9. The apparatus for continuous reciprocating multi-position folding and pressing sludge filter cloth according to claim 6, characterized in that, During the movement of sludge from one folding system to another in the folding unit, the sludge in the filter cloth is detached after passing through the unloading system. After unloading, the filter cloth is fed by the feeding system downstream of the unloading system, and after carrying the sludge, it enters the pre-compression system and the folding system.

10. The apparatus for continuous reciprocating multi-position folding and pressing sludge with filter cloth according to claim 6, characterized in that, The pre-compression system, as a pretreatment device for sludge, performs low-pressure treatment on the sludge, so that the sludge is evenly distributed between the two layers of filter cloth.

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