A sludge dewatering material spreading device and method

Abstract

This application discloses a sludge dewatering material spreading device and method, belonging to the field of sludge treatment technology. The sludge dewatering material spreading device includes a spreading bed, a filter press chamber, and a filter cloth frame. The filter press chamber is equipped with a filter basket and a tray assembly. The filter basket opening is equipped with a laser rangefinder. The tray assembly includes a tray and a lifting mechanism, which drives the tray to move up and down within the filter press chamber. The filter cloth frame provides filter cloth, and the spreading bed lays filter cloth and sludge within the filter press chamber. The tray assembly enables tray lifting, and the spreading bed lays filter cloth and sludge within the filter press chamber, with the sludge spread between the filter cloths for subsequent filtration. The laser rangefinder at the filter basket opening accurately measures the distance between the sludge material and the basket opening, allowing for precise and digitized measurement of the tray's lowering or raising height, thus achieving dynamic matching between the spreading material and the tray's descent.

Description

Technical Field

[0001] This application relates to a sludge dewatering material spreading device and method, belonging to the field of sludge treatment technology. Background Technology

[0002] Sludge is generally a byproduct of wastewater treatment. It contains a large amount of organic matter and harbors various harmful substances such as bacteria, viruses, and parasites. Current sludge treatment methods involve processes such as concentration, conditioning, dewatering, stabilization, drying, or incineration to reduce volume, stabilize, and render the sludge harmless. Sludge volume reduction is undoubtedly key to subsequent sludge treatment and a crucial aspect of sludge disposal. There are two main approaches to sludge volume reduction: reducing the organic matter content and lowering the water content. Technically and financially, the second approach is simpler and easier to implement than the first. Sludge dewatering aims to remove a large amount of water from the sludge, thereby reducing its volume and weight to facilitate transportation and further processing.

[0003] An important step in sludge treatment is to compress it for dewatering. Mechanical dewatering equipment, such as filter presses, is commonly used in sludge dewatering. When using a filter press to treat sludge, filter cloth is used. The sludge is wrapped in the filter cloth and then a hydraulic press is used to perform the filtration process, thereby achieving the separation of solids and liquids.

[0004] However, during the material laying process, that is, when the sludge is laid between the filter cloths and layered in the basket, since the sludge has a certain thickness after being laid, the basket needs to be lowered after each certain thickness. In the existing technology, when the basket should be lowered and by how much is generally determined by the operator's experience, which is inefficient, inaccurate, and poses a certain production risk if the judgment is wrong. Summary of the Invention

[0005] To address the aforementioned issues, this application proposes a sludge dewatering material spreading device and method. The device utilizes a tray assembly to raise and lower the tray, and a material spreading bed to lay filter cloth and sludge within the filter press chamber, with the sludge spread between the filter cloths for subsequent filtration. A laser rangefinder is installed at the opening of the filter basket to accurately measure the distance between the sludge material and the basket opening, enabling precise and digitized measurement of the tray's raising and lowering height, thus achieving dynamic matching between the material spreading and the tray's descent.

[0006] According to one aspect of this application, a sludge dewatering material spreading device is provided, including a material spreading bed, a filter press chamber, and a filter cloth frame. The filter press chamber is provided with a filter basket and a tray assembly. The filter basket has a laser rangefinder at its opening. The tray assembly includes a tray and a lifting component. The lifting component drives the tray to move up and down within the filter press chamber. The filter cloth frame provides filter cloth, and the material spreading bed spreads filter cloth and sludge within the filter press chamber.

[0007] Optionally, the lifting component includes a lifting cylinder.

[0008] Optionally, the lifting cylinder is equipped with an electronic ruler to measure the lifting value of the cylinder.

[0009] Optionally, the material bed is provided with a material spreading assembly, which reciprocates on the material spreading bed to spread filter cloth and sludge in the filter press chamber.

[0010] Optionally, the material spreading assembly includes a slide rail, a base plate, pulleys, and a material spreading pipe. The slide rail is disposed on the material spreading bed, the pulleys are disposed below the base plate, and the material spreading pipes are disposed above the base plate. The pulleys reciprocate along the slide rail.

[0011] Optionally, the filter cloth holder includes a roll shaft for winding the filter cloth.

[0012] Optionally, there are at least two material spreading pipes to achieve uniform material spreading.

[0013] According to another aspect of this application, this application also provides a method for spreading materials, comprising the following steps:

[0014] (1) The material spreading assembly moves forward and approaches the filter press chamber, bends the filter cloth on the roll shaft and continues to move forward to the filter cloth covering tray, and fixes the filter cloth above the filter press chamber.

[0015] (2) The material spreading component moves backward, and during the backward movement, the material spreading pipe discharges material to spread the material, and the material spreading thickness value is set;

[0016] (3) The hydraulic cylinder drives the pallet to descend, and the descent height is the thickness of the material.

[0017] (4) The laser rangefinder measures whether the distance between the material surface and the filter basket is the set value A. If it is less than the set value, the hydraulic cylinder will drive the tray to continue to descend until it reaches the set value A; if it is greater than the set value A, the hydraulic cylinder will drive the tray to rise until it reaches the set value A.

[0018] (5) Repeat (1) to (4) until the electronic ruler confirms that the oil cylinder is at the bottom. The laser rangefinder measures whether the distance between the material surface and the filter basket is greater than the set value B. If it is greater than the set value B, the material spreading component will spread the material until the distance between the material surface and the filter basket is 0 to 2 cm, and then proceed to the next stage. If it is not greater than the set value B, then proceed to the next stage.

[0019] Optionally, the laser rangefinder is provided with at least two laser points to measure the distance between the material surface and the filter basket, and the average value is used as the final measurement data.

[0020] Optionally, in step (4), if the distance between the material surface and the filter basket measured by the laser rangefinder is less than the set value A in two consecutive steps, the machine will stop and alarm.

[0021] The beneficial effects that this application may produce include, but are not limited to:

[0022] 1. The sludge dewatering material spreading device provided in this application realizes the lifting and lowering of the tray by setting a tray assembly, and lays filter cloth and sludge in the filter press chamber by setting a material spreading bed, with the sludge spread between the filter cloth for subsequent filter pressing; by setting a laser rangefinder at the opening of the filter basket, the distance between the sludge material and the opening of the basket can be accurately measured, so as to further refine the height of the tray's lowering or raising, and achieve dynamic matching between the material spreading and the tray's lowering.

[0023] 2. The sludge dewatering material spreading device provided in this application is equipped with a lifting cylinder and an electronic ruler inside the lifting cylinder to measure the lifting height of the lifting cylinder so as to dynamically match the material spreading thickness. This avoids excessive material spreading height difference caused by excessive descent of the lifting cylinder, which would increase the wear of the filter cloth to a certain extent. On the other hand, excessive height difference can easily cause uneven spreading, thus affecting the subsequent filter pressing effect.

[0024] 3. The sludge dewatering material spreading device provided in this application has a material spreading component. The material spreading component reciprocates on the material spreading bed. When it moves close to the filter chamber, it spreads filter cloth, and when it moves away from the filter chamber, it spreads sludge material. This step is repeated, and the filter cloth and sludge material are stacked layer by layer. By limiting the number of material spreading pipes to at least 2, the uniformity of material spreading is ensured.

[0025] 4. The material spreading method provided in this application uses the combined action of a laser rangefinder and an electronic ruler for the lifting and lowering cylinder to precisely measure the distance between the material and the filter basket and the height of the tray's descent. This allows for dynamic matching between the thickness of the material spread and the height of the tray's descent, ensuring uniform spreading while maintaining production safety. This method eliminates the need for operators to rely on experience and judgment, making the spreading process more automated, precise, efficient, and safe. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0027] Figure 1 This is a side view of the sludge dewatering material spreading device according to an embodiment of this application;

[0028] Figure 2 This is a frontal cross-sectional view of an embodiment of this application.

[0029] List of components and reference numerals:

[0030] 1. Material spreading bed; 2. Filter press chamber; 3. Filter cloth frame; 4. Filter basket; 5. Lifting component; 6. Slide rail; 7. Pulley; 8. Base plate; 9. Material spreading pipe; 10. Cloth rolling shaft; 11. Tray; 12. Laser rangefinder. Detailed Implementation

[0031] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0032] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0034] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0038] refer to Figures 1-2 The embodiments of this application disclose a sludge dewatering material spreading device, including a material spreading bed 1, a filter press chamber 2, and a filter cloth frame 3. The filter press chamber 2 is provided with a water filter basket 4 and a tray 11 assembly. The basket opening of the water filter basket 4 is provided with a laser rangefinder 12. The tray assembly includes a tray 11 and a lifting component 5. The lifting component 5 drives the tray 11 to move up and down within the filter press chamber 2. The filter cloth frame 3 provides filter cloth, and the material spreading bed 1 lays filter cloth and sludge within the filter press chamber 2.

[0039] Specifically, the tray 11 is raised and lowered by setting up a tray assembly, and filter cloth and sludge are laid in the filter press chamber 2 by setting up a material bed 1, with the sludge laid between the filter cloths for subsequent filtration. By setting a laser rangefinder 12 at the opening of the filter basket 4, the distance between the sludge material and the opening of the basket can be accurately measured, so as to further refine and digitize the height of the tray 11 when it is raised or lowered, so as to achieve dynamic matching between the material laid and the lowering of the tray 11.

[0040] In one embodiment, the lifting component 5 includes a lifting cylinder.

[0041] Specifically, the lifting and lowering cylinders raise and lower, thereby causing the pallet 11 to rise or fall, so that after a certain thickness of material is laid, the lifting and lowering cylinders can make corresponding adjustments.

[0042] In one embodiment not shown, an electronic ruler is installed inside the lifting cylinder to measure the lifting value of the cylinder.

[0043] Specifically, an electronic ruler is installed inside the lifting and lowering cylinder. The electronic ruler can measure and quantify the height of the lifting and lowering cylinder, which changes the current situation where the judgment is based on the operator's experience, making the process more efficient and controllable.

[0044] In one embodiment, a material spreading assembly is provided on the material spreading bed 1, and the material spreading assembly reciprocates on the material spreading bed 1 to spread filter cloth and sludge in the filter press chamber 2.

[0045] In one implementation, the material spreading assembly includes a slide rail 6, a base plate 8, a pulley 7, and a material spreading pipe 9. The slide rail 6 is located on the material spreading bed 1, the pulley 7 is located below the base plate 8, and the material spreading pipe 9 is located above the base plate 8. The pulley 7 reciprocates along the slide rail 6.

[0046] Specifically, this application does not limit the number of pulleys 7 or the diameter and number of material laying pipes 9; those skilled in the art can make selections based on actual circumstances.

[0047] Specifically, this application does not impose specific limitations on the positions of the slide rail 6 and the pulley 7. Those skilled in the art can make choices based on the actual situation. As long as the positions of the two correspond and the pulley 7 can reciprocate on the slide rail 6, it is acceptable.

[0048] In one embodiment, the filter cloth holder 3 includes a cloth winding shaft 10 for winding the filter cloth.

[0049] Specifically, the filter cloth is wound on the cloth winding shaft 10 of the filter cloth frame 3. When the material spreading assembly moves forward and approaches the filter press chamber 2, the material spreading assembly bends the filter cloth on the cloth winding shaft 10 and continues to move forward. The filter cloth on the cloth winding shaft 10 gradually detaches from the cloth winding shaft 10 and, under the action of the material spreading device, covers the filter press chamber 2 layer by layer.

[0050] In one implementation method, there are 4 material spreading pipes 9 to achieve uniform material spreading.

[0051] Specifically, the material spreading pipes 9 are set to 4, which can balance cost, efficiency and spreading effect. On the one hand, setting 4 material spreading pipes 9 is conducive to more uniform spreading. On the other hand, setting 4 material spreading pipes 9 is more efficient and moderately cost-effective.

[0052] Embodiments of this application also disclose a material spreading method, including the following steps:

[0053] (1) The material spreading assembly moves forward and approaches the filter press chamber 2, bends the filter cloth on the roll cloth shaft and continues to move forward to the filter cloth covering tray 11, and fixes the filter cloth above the filter press chamber 2.

[0054] (2) The material spreading component moves backward. During the backward movement, the material spreading pipe 9 discharges material to spread it. Set the material spreading thickness value.

[0055] (3) The hydraulic cylinder drives the pallet 11 to descend, and the descent height is the material thickness value;

[0056] (4) The laser rangefinder 12 measures whether the distance between the material surface and the filter basket 4 is the set value A. If it is less than the set value, the oil cylinder drives the tray 11 to continue to descend until the set value A is reached; if it is greater than the set value A, the oil cylinder drives the tray 11 to rise until the set value A is reached.

[0057] (5) Repeat (1) to (4) until the electronic ruler confirms that the oil cylinder has reached the bottom. The laser rangefinder 12 measures whether the distance between the material surface and the filter basket 4 is greater than the set value B. If it is greater than the set value B, the material spreading component will spread the material until the distance between the material surface and the filter basket 4 is 0 to 2 cm, and then proceed to the next stage. If it is not greater than the set value B, then proceed to the next stage.

[0058] Specifically, this method achieves dynamic balance between the laying of materials and the descent of the pallet 11. The laser rangefinder 12 and the electronic ruler of the lifting and lowering cylinder work together to quantify the lifting height and the laying height throughout the entire laying process. This changes the current situation in which the lifting height is determined by the operator's experience. On the one hand, the dynamic matching between the thickness of the laid materials and the descent height of the pallet 11 is beneficial to the uniformity of the laid materials. On the other hand, it avoids production accidents caused by operator misjudgment.

[0059] Specifically, this application does not impose specific limitations on setting value A and setting value B, and those skilled in the art can choose according to the actual situation.

[0060] As a preferred embodiment, value A is set to 10cm; value B is set to 5cm.

[0061] In one implementation, the laser rangefinder 12 is provided with at least two laser points to measure the distance between the material surface and the filter basket 4, and the average value is used as the final measurement data.

[0062] Specifically, since the flatness of the material is inevitably inconsistent during the laying process, in order to make the measured distance from the material surface to the filter basket 4 more accurate, the laser rangefinder 12 is equipped with at least two laser points.

[0063] As one implementation method, in step (4), if the distance between the material surface and the filter basket 4 measured by the laser rangefinder 12 is less than the set value A in two consecutive measurements, the machine will stop and alarm.

[0064] Specifically, to prevent errors in the descent of the tray 11 during the material laying process, a shutdown alarm is set if the distance between the material surface and the filter basket 4 measured by the laser rangefinder 12 is less than the set value A for two consecutive times, thus preventing production accidents.

[0065] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0066] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for spreading materials, characterized in that, The sludge dewatering material spreading device is used for spreading the material, including the following steps: (1) The material spreading assembly moves forward and approaches the filter press chamber, bends the filter cloth on the roll shaft and continues to move forward to the filter cloth covering tray, and fixes the filter cloth above the filter press chamber; (2) The material spreading component moves backward, and during the backward movement, the material spreading pipe discharges material to spread the material, and the material spreading thickness value is set; (3) The hydraulic cylinder drives the pallet to descend, and the descent height is the thickness of the material. (4) The laser rangefinder measures whether the distance between the material surface and the filter basket is the set value A. If it is less than the set value, the hydraulic cylinder will drive the tray to continue to descend until it reaches the set value A. If it is greater than the set value A, the hydraulic cylinder will drive the tray to rise until it reaches the set value A. If the distance between the material surface and the filter basket measured by the laser rangefinder is less than the set value A twice in a row, the machine will stop and alarm. (5) Repeat (1) to (4) until the electronic ruler confirms that the oil cylinder has reached the bottom. The laser rangefinder measures whether the distance between the material surface and the filter basket is greater than the set value B. If it is greater than the set value B, the material spreading component will spread the material until the distance between the material surface and the filter basket is 0~2cm, and then proceed to the next stage. If it is not greater than the set value B, then proceed to the next stage. The sludge dewatering material spreading device includes a spreading bed, a filter press chamber, and a filter cloth frame. The filter press chamber contains a filter basket and a tray assembly. The filter basket has a laser rangefinder at its opening, with at least two laser points to measure the distance between the material surface and the filter basket, using the average value as the final measurement data. The tray assembly includes a tray and a lifting mechanism, which moves the tray up and down within the filter press chamber. The filter cloth frame provides filter cloth, and the spreading bed lays the filter cloth and sludge within the filter press chamber. The lifting component includes a lifting and lowering hydraulic cylinder; The lifting cylinder is equipped with an electronic ruler to measure the lifting value of the cylinder.

2. The method for spreading materials according to claim 1, characterized in that, The material bed is equipped with a material spreading component, which reciprocates on the material spreading bed to spread filter cloth and sludge in the filter press chamber.

3. The method for spreading materials according to claim 2, characterized in that, The material spreading assembly includes a slide rail, a base plate, pulleys, and a material spreading pipe. The slide rail is located on the material spreading bed, the pulleys are located below the base plate, and the material spreading pipes are located above the base plate. The pulleys reciprocate along the slide rail.

4. The method for spreading materials according to claim 1, characterized in that, The filter cloth holder includes a roll shaft for winding the filter cloth.

5. The method for spreading materials according to claim 1, characterized in that, There are at least two material spreading pipes to ensure uniform material spreading.

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