Sludge filter press capable of being automatically opened and closed

Abstract

The utility model discloses a sludge filter press capable of being automatically opened and closed. The sludge filter press comprises a platform, a movable pressing cage is arranged on the platform, a pushing hydraulic cylinder is arranged on one side of the pressing cage, two groups of filter pressing cavities are arranged in the pressing cage, the upper parts of the two groups of filter pressing cavities are opened, and a press matched with the filter pressing cavities is arranged above the pressing cage. The device has the beneficial effects that the total sludge distribution amount of the sludge blanking machine into the filter pressing cavity can be automatically obtained by arranging the belt weighing feeder, and water obtained by filter pressing can be collected and weighed by arranging the water collecting tank and the weighing sensor; the external controller can measure and calculate the moisture content of the sludge being pressed in the filter pressing cavity in real time according to the moisture content of the raw material sludge, the weight of the raw material sludge and the weight of the filtered water, so that when the moisture content of the sludge being pressed in the filter pressing cavity reaches the standard, the external controller controls the press to automatically stop lifting out, the filter pressing time is effectively shortened, and the filter pressing efficiency is improved. And the production capacity of equipment is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of sludge filter press technology, and in particular to a sludge filter press that can be automatically opened and closed. Background Technology

[0002] In sludge treatment processes, after sludge is concentrated and digested, it still has a high moisture content and a large volume. Sludge dewatering can further remove pore water and capillary water from the sludge, reducing its volume. Vertical sludge deep pressure filter dewatering equipment is a type of mechanical dewatering equipment that has gradually emerged in recent years. Compared with common sludge dewatering machines, it has the characteristics of simple system, large single processing capacity, low operating cost, and high-pressure mechanical vertical extrusion of sludge. Under the conditions of proper selection and dosage of equipment and reagents and precise control, the moisture content of the influent sludge is about 80%, and the average moisture content of the effluent sludge can reach 50%-55%.

[0003] Some existing sludge filter presses typically extend the filtration time to ensure that the sludge moisture content meets the set standard. While this method can achieve the required sludge moisture content, it not only increases energy consumption but also leads to lower utilization of the filter press equipment and reduced production efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing sludge filter presses, which typically extend the filtration time to ensure that the sludge moisture content meets the set standard. Although this method can achieve the required sludge moisture content, it not only increases energy consumption but also leads to low utilization of the filter press equipment and reduced production efficiency. This invention provides a sludge filter press that can be automatically opened and closed.

[0005] The purpose of this utility model is achieved through the following technical solution: an automatically opening and closing sludge filter press, including a platform, a movable pressing cage installed on the platform, a pushing hydraulic cylinder installed on one side of the pressing cage, two sets of filter pressing chambers arranged inside the pressing cage, both sets of filter pressing chambers having an open upper part, a press adapted to the filter pressing chambers installed above the pressing cage, two sets of material feeders corresponding to the filter pressing chambers installed on both sides of the pressing cage, a sludge feeder installed above each of the two sets of material feeders, and a belt weighing feeder installed at the feed end of each set of sludge feeders. By setting the belt weighing feeder, the total amount of sludge fed into the filter pressing chamber by the sludge feeder can be automatically obtained.

[0006] Drainage holes are provided on the side walls of the filter press chamber. Water guide grooves corresponding to the drainage holes are installed at the front and back of the filter press chamber. Drainage grooves are installed on the side of the two filter press chambers that are far apart from each other. One side of the water guide groove is connected to the drainage groove. Drainage chambers are provided on the side of the two filter press chambers that are close to each other. A first drainage outlet is provided at the bottom of the drainage chamber and a second drainage outlet is provided at the bottom of the drainage groove. By setting up the water guide groove and the drainage groove, the water produced by the filter press can be collected into the water collection tank to prevent water from overflowing to the outside and causing damage to the environment.

[0007] The platform is equipped with water collection tanks corresponding to the first and second drainage outlets. The outlet of the water collection tanks is connected to the water collection tank. A weighing sensor is installed at the bottom of the water collection tank. The press, the moving hydraulic cylinder, the belt weighing feeder, and the weighing sensor are all connected to an external controller. The water collection tank and the weighing sensor can collect and weigh the filtered water. The external controller can calculate the moisture content of the sludge being filtered in the filter chamber in real time by combining the moisture content of the raw sludge, the weight of the raw sludge, and the weight of the filtered water. When the moisture content of the sludge being filtered in the filter chamber reaches the standard, the external controller controls the press to automatically stop lifting out. The moving hydraulic cylinder moves another set of filter chambers that has been filled with material to the press for filtration. The filter chambers that have completed filtration are unloaded and filled with material again in sequence. This process is repeated to complete the automatic opening and closing of the filter press equipment. Under the condition of meeting the sludge moisture content processing requirements, the filtration time is effectively shortened, and the two sets of filter chambers can effectively improve the utilization rate of the equipment and improve the production capacity of the equipment.

[0008] A further technical solution is that the interior of both sets of filter press chambers is slidably connected with a support plate, and two sets of lifting hydraulic cylinders corresponding to the two sets of support plates are installed on the platform. The two sets of lifting hydraulic cylinders are located below the two sets of material placing machines. By setting the lifting hydraulic cylinders to push the support plates up and down in the filter press chamber, they cooperate with the material placing machines to place and load materials, effectively improving the loading efficiency of the equipment.

[0009] A further technical solution is to have a groove on the inner bottom wall of the filter press chamber, and to install a block on the support plate that matches the groove. The groove and the block can seal the inner bottom wall of the filter press chamber, preventing the filter water from overflowing from the bottom wall of the filter press chamber to the outside, which would not only affect the external environment, but also affect the accuracy of the weighing sensor measurement data, and thus affect production efficiency.

[0010] A further technical solution is to install a partition between the two sets of drainage chambers. The partition prevents water in the drainage chamber from flowing into the other drainage chamber through the drainage hole during the filtration process, thus affecting the accuracy of the load cell measurement data and ensuring the accuracy of the load cell measurement data.

[0011] A further technical solution involves installing two sets of infrared sensors on the platform, with corresponding sensing blocks installed on both sides of the pressing cage. The infrared sensors are connected to the pushing hydraulic cylinder. By setting up two sets of infrared sensors, the platform can detect whether the pressing cage has reached the set position on the platform by detecting the sensing blocks. When the infrared sensors detect the sensing blocks, they send a signal to the pushing hydraulic cylinder, at which point the pushing hydraulic cylinder stops pushing the pressing cage, thereby allowing the pressing cage to reach the required position and preventing deviations in the position of the pressing cage from affecting the normal operation of the equipment.

[0012] A further technical solution is to install a filter screen at the water inlet of the water collection tank to prevent sludge or other impurities from entering the water collection tank and causing blockage.

[0013] A further technical solution is to install a track on the platform corresponding to the pressing cage, and install limit blocks on the track corresponding to the pressing cage. Setting limit blocks can physically limit the pressing cage when the infrared sensor malfunctions, thus preventing equipment failure.

[0014] This invention has the following advantages: By setting up a belt weighing feeder, the total amount of sludge fed from the sludge feeder into the filter press chamber can be automatically obtained. A water collection tank and weighing sensor can collect and weigh the filtered water. An external controller can calculate the moisture content of the sludge being filtered in the filter press chamber in real time, combining the moisture content of the raw sludge, the weight of the raw sludge, and the weight of the filtered water. When the moisture content of the sludge in the filter press chamber reaches the standard, the external controller controls the press to automatically stop lifting out, and a hydraulic cylinder moves another set of filter press chambers that have already been fed into the press for filtration. The filter press chambers that have completed filtration are then unloaded and reloaded in sequence, repeating this process to automatically start and stop the filter press equipment. Under the condition of meeting the sludge moisture content processing requirements, the filtration time is effectively shortened, and the two sets of filter press chambers effectively improve the utilization rate of the equipment and increase its production capacity. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 2 This is a front view structural diagram of the present utility model;

[0017] Figure 3 For the present utility model Figure 1 Enlarged schematic diagram of structure A in the middle;

[0018] In the diagram: 1. Platform; 2. Press cage; 3. Filter press chamber; 4. Sludge feeder; 5. Conveyor; 6. Belt weighing feeder; 7. Drainage hole; 8. Drainage trough; 9. Pallet; 10. Press; 11. Drainage chamber; 12. Partition; 13. Pushing hydraulic cylinder; 14. Infrared sensor; 15. Sensing block; 16. Lifting hydraulic cylinder; 17. First drain outlet; 18. Water collection tank; 19. Weighing sensor; 20. Water guide trough; 21. Second drain outlet; 22. Filter screen; 23. Water collection trough; 24. Groove; 25. Insert block; 26. Limiting block; 27. Track. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figures 1-3 As shown, an automatically opening and closing sludge filter press includes a platform 1, on which a movable pressing cage 2 is installed. A pushing hydraulic cylinder 13 is installed on one side of the pressing cage 2. Two sets of filter pressing chambers 3 are arranged inside the pressing cage 2. The upper part of both sets of filter pressing chambers 3 is open. A press 10 adapted to the filter pressing chamber 3 is arranged above the pressing cage 2. Two sets of material feeders 5 corresponding to the filter pressing chambers 3 are installed on both sides of the pressing cage 2. A sludge feeder 4 is arranged above each set of material feeders 5. A belt weighing feeder 6 is installed at the feed end of each set of sludge feeders 4. By setting the belt weighing feeder 6, the total amount of sludge fed by the sludge feeder 4 into the filter pressing chamber 3 can be automatically obtained.

[0026] Drainage holes 7 are provided on the side wall of the filter press chamber 3. In order to balance the overall strength and drainage efficiency of the press cage 2, the density of drainage holes at the lower part of the side wall of the filter press chamber 3 is greater than that at the upper part of the side wall. Water guide grooves 20 corresponding to drainage holes 7 are installed at the front and back of the filter press chamber 3. Drainage grooves 8 are installed on the side of the two filter press chambers 3 that are far apart from each other. One side of the water guide groove 20 is connected to the drainage groove 8. Drainage chambers 11 are provided on the side of the two filter press chambers 3 that are close to each other. A first drainage outlet 17 is provided at the bottom of the drainage chamber 11, and a second drainage outlet 21 is provided at the bottom of the drainage groove 8. By setting up the water guide groove 20 and the drainage groove 8, the water produced by the filter press can be collected into the water collection tank 18, so as to prevent water from overflowing to the outside and causing damage to the environment.

[0027] Platform 1 is equipped with a water collection trough 23 corresponding to the first drain outlet 17 and the second drain outlet 21. The outlet of the water collection trough 23 is connected to the water collection tank 18. A weighing sensor 19 is installed at the bottom of the water collection tank 18. The press 10, the pushing hydraulic cylinder 13, the belt weighing feeder 6, and the weighing sensor 19 are all connected to an external controller. The water collection tank 18 and the weighing sensor 19 can collect and weigh the filtered water. The external controller can calculate the pressure being applied in the filter chamber 3 in real time by combining the moisture content of the raw sludge, the weight of the raw sludge, and the weight of the filtered water. The moisture content of the sludge is controlled by the external controller. When the moisture content of the sludge being filtered in the filter press chamber 3 reaches the standard, the external controller controls the press 10 to automatically stop lifting out and push the hydraulic cylinder 13 to move another set of filter press chambers 3 that have been filled with material to the press 10 for filtration. The filter press chambers 3 that have completed filtration are unloaded and filled with material again in sequence. This process is repeated to complete the automatic opening and closing of the filter press equipment. Under the processing condition of meeting the sludge moisture content, the filtration time is effectively shortened, and the two sets of filter press chambers 3 can effectively improve the utilization rate of the equipment and effectively improve the production capacity of the equipment.

[0028] Both sets of filter press chambers 3 are slidably connected to support plates 9. Two sets of lifting hydraulic cylinders 16 are installed on the platform 1, which correspond to the two sets of support plates 9 respectively. The two sets of lifting hydraulic cylinders 16 are located below the two sets of material placing machines 5 respectively. By setting the lifting hydraulic cylinders 16, the support plates 9 are pushed up and down in the filter press chamber 3 to cooperate with the material placing machine 5 for material placing and loading, which effectively improves the loading efficiency of the equipment.

[0029] The inner bottom wall of the filter press chamber 3 is provided with a groove 24, and the support plate 9 is equipped with an insert 25 that cooperates with the groove 24. The groove 24 and the insert 25 cooperate to seal the inner bottom wall of the filter press chamber 3, preventing the filter water from overflowing from the bottom wall of the filter press chamber 3 to the outside, which would not only affect the external environment, but also affect the accuracy of the measurement data of the weighing sensor 19, and thus affect the production efficiency.

[0030] A partition 12 is installed between the two sets of drainage chambers 11. The partition 12 is set to prevent water in the drainage chamber 11 from flowing into the other filter chamber 3 through the drainage hole 7 during the filter pressing process, which would affect the accuracy of the measurement data of the weighing sensor 19 and ensure the accuracy of the measurement data of the weighing sensor 19.

[0031] Two sets of infrared sensors 14 are installed on platform 1. Sensor blocks 15 corresponding to the infrared sensors 14 are installed on both sides of the pressing cage 2. The infrared sensors 14 are connected to the pushing hydraulic cylinder 13. The two sets of infrared sensors 14 can detect the sensor blocks 15 to determine whether the pressing cage 2 has moved to the set position on platform 1. When the infrared sensors 14 detect the sensor blocks 15, they send a signal to the pushing hydraulic cylinder 13. At this time, the pushing hydraulic cylinder 13 stops pushing the pressing cage 2, so that the pressing cage 2 reaches the required position and avoids the position of the pressing cage 2 from deviating and affecting the normal operation of the equipment.

[0032] A filter screen 22 is installed at the water inlet of the water collection tank 23. The filter screen 22 is set to prevent sludge or other impurities from entering the water collection tank 23 and causing blockage.

[0033] The platform 1 is equipped with a track 27 corresponding to the pressing cage 2. Both sides of the track 27 are equipped with limit blocks 26 corresponding to the pressing cage 2. The limit blocks 26 can physically limit the pressing cage 2 when the infrared sensor 14 malfunctions, thus preventing equipment failure.

[0034] The working process of this utility model is as follows: After a set of filter press chambers 3 is loaded with sludge by the sludge feeder 4 and the cloth feeder 5, the belt weighing feeder 6 obtains the total weight of the sludge in the filter press chambers 3 during the loading process. At this time, the pushing hydraulic cylinder 13 pushes the pressing cage 2 to move on the platform 1. When the infrared sensor 14 and the sensing block 15 detect that the pressing cage 2 has reached the designated position, the infrared sensor 14 controls the pushing hydraulic cylinder 13 to stop, and another set of filter press chambers 3 begins to be loaded. At this time, the press 10 performs filter pressing on the filter press chambers 3. The filter water flows into the water collection tank 18 through the drain hole 7, the water guide trough 20 and the drain trough 8. Sensor 19 weighs and measures the water in the water collection tank 18. The external controller calculates the real-time sludge moisture content in the filter chamber 3 based on the weight of the filtered water, the weight of the original sludge, and the moisture content of the original sludge measured in real time by the weighing sensor 19. When the sludge moisture content reaches the set standard, the external controller controls the press 10 to stop working and exit the filter chamber 3. At this time, the hydraulic cylinder 13 pushes the press cage 2 to move on the platform 1 again, moving another filter chamber 3 with assembled material to the filter position for filter pressing. After the filter pressing is completed, the filter chamber 3 begins to unload and load material. By repeating the above process, the automatic start and stop operation of the filter press equipment can be realized.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sludge filter press that can be automatically opened and closed, comprising a platform (1), characterized in that: The platform (1) is provided with a movable squeezing cage (2), one side of the squeezing cage (2) is provided with a pushing hydraulic cylinder (13), two groups of filter pressing cavities (3) are arranged in the squeezing cage (2), the upper portions of the two groups of filter pressing cavities (3) are provided with openings, a press (10) matched with the filter pressing cavities (3) is arranged above the squeezing cage (2), two groups of cloth distributing machines (5) corresponding to the filter pressing cavities (3) are arranged on the two sides of the squeezing cage (2), a sludge discharging machine (4) is arranged above each group of cloth distributing machines (5), and a belt weighing feeder (6) is arranged at the feeding end of each group of sludge discharging machines (4). Drainage holes (7) are formed in the side walls of the filter pressing cavities (3), water guide grooves (20) corresponding to the drainage holes (7) are arranged on the front and back of the filter pressing cavities (3), drainage grooves (8) are arranged on the sides of the two groups of filter pressing cavities (3) away from each other, one side of the water guide groove (20) is connected with the drainage groove (8), and drainage cavities (11) are arranged on the sides of the two groups of filter pressing cavities (3) close to each other, a first drainage opening (17) is formed in the bottom of the drainage cavity (11), and a second drainage opening (21) is formed in the bottom of the drainage groove (8). A water collecting groove (23) corresponding to the first drainage opening (17) and the second drainage opening (21) is arranged on the platform (1), a water outlet end of the water collecting groove (23) is connected with a water collecting tank (18), a weighing sensor (19) is arranged at the bottom of the water collecting tank (18), and the press (10), the pushing hydraulic cylinder (13), the belt weighing feeder (6) and the weighing sensor (19) are connected with an external controller.

2. The self-starting and self-stopping sludge filter press according to claim 1, characterized in that: The inner portions of the two groups of filter pressing cavities (3) are slidably connected with supporting plates (9), and two groups of lifting hydraulic cylinders (16) corresponding to the two groups of supporting plates (9) are arranged on the platform (1) and below the two groups of cloth distributing machines (5).

3. The self-starting and self-stopping sludge filter press according to claim 2, characterized in that: A recess (24) is formed in the inner bottom wall of the filter pressing cavity (3), and an insertion block (25) matched with the recess (24) is arranged on the supporting plate (9).

4. The self-starting and self-stopping sludge filter press according to claim 1, characterized in that: A partition plate (12) is arranged between the two groups of drainage cavities (11).

5. The self-starting and self-stopping sludge filter press according to claim 1, characterized in that: Two groups of infrared sensors (14) are arranged on the platform (1), and sensing blocks (15) corresponding to the infrared sensors (14) are arranged on the two sides of the squeezing cage (2), and the infrared sensors (14) are connected with the pushing hydraulic cylinder (13).

6. The self-starting and self-stopping sludge filter press according to claim 1, characterized in that: A filter screen (22) is arranged at the water inlet end of the water collecting groove (23).

7. The self-starting and self-stopping sludge filter press according to claim 5, characterized in that: A track (27) corresponding to the squeezing cage (2) is arranged on the platform (1), and a limiting stop block (26) corresponding to the squeezing cage (2) is arranged on the track (27).

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