A sludge dewatering material spreading device and a material spreading method

Abstract

The application discloses a sludge dewatering material laying device and a material laying method, and belongs to the technical field of sludge treatment. The material laying method comprises the following steps: a material laying assembly is advanced to be close to a filter pressing cavity, a filter cloth covers a tray, and the filter cloth is fixed above the filter pressing cavity; the material laying assembly is retreated to lay material, the oil cylinder drives the tray to descend once for each layer of laid material; the time of the oil cylinder driving the tray to descend is adjusted; after the oil cylinder completes descending, a laser ranging piece measures the distance from the material surface to the filter water frame basket; until the oil cylinder reaches the bottom, the laser ranging piece measures the distance from the material surface to the filter water frame basket, and the supplementary laying work is started; the distance measured by the laser ranging piece is calculated into the number of layers of laid material, and supplementary laying is performed. The laser ranging piece is used to ensure that the material height is not higher than the filter water frame basket, and after the oil cylinder reaches the bottom, the laser ranging piece is used to determine whether the supplementary laying program is started and the number of layers of supplementary laid material, so that the production risk is not generated and the efficiency is maximized.

Description

TECHNICAL FIELD

[0001] The application relates to a sludge dewatering paving device and a paving method, and belongs to the technical field of sludge treatment. BACKGROUND

[0002] Sludge is generally a product in the process of sewage treatment, and contains a large amount of organic matter and harmful substances such as various bacteria, viruses and parasites. The current sludge treatment method is a processing process of sludge concentration, conditioning, dewatering, stabilization, drying or incineration and the like for reduction, stabilization and harmlessness. Sludge reduction is undoubtedly the key to subsequent sludge treatment and the focus of sludge disposal. There are two ways for sludge reduction, one is to reduce the content of organic matter in sludge, and the other is to reduce the moisture content of sludge. From the technical and financial aspects, the second way is simpler and easier to implement than the first way. The purpose of sludge dewatering is to remove a large amount of water in the sludge, thereby reducing its volume and weight, so as to facilitate the transportation and further treatment of the sludge.

[0003] An important step in sludge treatment is to compress the sludge for dewatering treatment. Mechanical dewatering equipment such as filter presses is often used in sludge dewatering treatment. When the filter press is used to treat sludge, filter cloth is used to wrap the sludge and then a hydraulic press is used for the filter pressing process, thereby realizing the separation of solid and liquid.

[0004] In the paving process, the sludge is uniformly laid between the filter cloths and is stacked layer by layer in the filter basket. Since the sludge has a certain thickness after being laid, the basket needs to be lowered after a certain thickness is laid. In the prior art, when the basket is lowered and the lowering height is determined, it is generally determined by the experience of the operator, which is low in efficiency, not accurate enough and has certain production risks in case of judgment errors. Therefore, how to control the lowering height to be appropriate and the total paving height and the number of paving layers in the paving process so as to avoid production risks and realize high efficiency is a problem to be solved. SUMMARY

[0005] In order to solve the above problems, the application provides a sludge dewatering paving device and a paving method. The distance from the material surface to the filter basket is measured by a laser distance measuring element to ensure that the material height is not higher than the basket opening of the filter basket. After the oil cylinder is lowered to the bottom, the distance from the material surface to the filter basket is measured by the laser distance measuring element to determine whether to start the supplementary paving program and the number of supplementary paving layers, so as to realize maximum efficiency without production risks.

[0006] According to one aspect of the application, a paving method is provided, comprising the following steps:

[0007] (1) paving assembly advances close to the filter chamber, the filter cloth on the filter cloth frame roll shaft is bent and continues to advance, until the filter cloth covers the tray, and the filter cloth is fixed above the filter chamber;

[0008] (2) the paving assembly retreats, and the paving pipe discharges material for paving during the retreat, and the oil cylinder drives the tray to descend once for each paving layer;

[0009] (3) the time for the oil cylinder to drive the tray to descend is adjusted once for each A layer of paving;

[0010] (4) after each paving is completed and the oil cylinder is lowered, the laser ranging element measures the distance from the material surface to the filter basket, and if the material height is higher than the filter basket opening, the oil cylinder drives the tray to descend to ensure that the material does not exceed the filter basket opening;

[0011] (5) repeating (1)-(4) until the oil cylinder is at the bottom, and the laser ranging element measures the distance from the material surface to the filter basket, and if the measured distance is greater than the set value B, the paving work is started;

[0012] (6) the distance measured by the laser ranging element is calculated as the number of paving layers, and the corresponding number of layers is paved to complete the paving process.

[0013] Optionally, the laser ranging element is provided with two, which are respectively installed on both sides of the filter basket.

[0014] Optionally, the laser ranging element is provided with two laser points; in the step (4), the larger value of the two laser point measurement values is used; and in the step (5), the smaller value of the two laser point measurement values is used.

[0015] Optionally, in the step (4), if the material surface measured by the laser ranging element is higher than the filter basket for two times in succession, the machine is stopped and an alarm is given.

[0016] According to another aspect of the present application, the present application also provides a paving device for sludge dewatering, which comprises a paving bed, a filter chamber, a filter cloth frame and a filter cloth pressing assembly, the filter chamber is provided with a filter basket and a tray assembly, the basket opening of the filter basket is provided with a laser ranging element, the tray assembly comprises a tray and a lifting oil cylinder, the lifting oil cylinder drives the tray to make lifting movement in the filter chamber; the filter cloth frame provides filter cloth, the paving bed lays filter cloth and sludge in the filter chamber, and the filter cloth pressing assembly presses the filter cloth above the filter chamber.

[0017] Optionally, the paving bed is provided with a paving part, and the paving part makes reciprocating movement on the paving bed.

[0018] Optionally, the filter cloth pressing assembly comprises a cylinder, a first pressing piece, a second pressing piece and a connecting shaft, the connecting shaft connects the first pressing piece and the second pressing piece, one end of the cylinder is fixedly connected with the first pressing piece, the cylinder pushes the first pressing piece to control the included angle between the first pressing piece and the second pressing piece to realize the pressing of the filter cloth.

[0019] Optionally, the first pressing piece comprises a first clamping part and a first arm part, the second pressing piece comprises a second clamping part and a second arm part, the first clamping part and the first arm part are respectively arranged on two sides of the connecting shaft, and the second clamping part and the second arm part are respectively arranged on two sides of the connecting shaft.

[0020] Optionally, the second clamping part and the second arm part are fixed to the edge of the filter basket.

[0021] Optionally, a protrusion is arranged on the first clamping part, a groove is arranged on the second clamping part, and the position of the protrusion corresponds to the position of the groove.

[0022] The application can produce beneficial effects, including but not limited to:

[0023] 1. The paving method provided by the application determines the distance from the material surface to the filter basket by a laser distance measuring element to ensure that the material height is not higher than the basket opening of the filter basket, and after the oil cylinder is bottomed, the distance from the material surface to the filter basket is determined by the laser distance measuring element to determine whether to start the re-paving program and the number of re-paved layers, so as to maximize the efficiency without production risk, and no longer rely on manual real-time observation.

[0024] 2. The paving device for sludge dewatering provided by the application is provided with a paving assembly, the paving assembly reciprocates on a paving bed, lays filter cloth when moving close to the filter chamber, lays sludge material when moving away from the filter chamber, and repeats the steps to stack the filter cloth and sludge material layer by layer.

[0025] 3. The paving device for sludge dewatering provided by the application has a filter cloth pressing assembly, a first pressing piece, a second pressing piece and a connecting shaft are arranged between the cylinder and the filter cloth, the connecting shaft connects the first pressing piece and the second pressing piece to form a lever structure, the included angle between the first pressing piece and the second pressing piece is changed by the cylinder to the first pressing piece, and then the opening and closing of the filter cloth pressing device is controlled, and a better filter cloth pressing effect can be achieved by using the lever principle with a smaller force. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings described herein are used to provide further understanding of the application, constitute a part of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0027] Figure 1 A three-dimensional structural schematic view of a sludge dewatering paving device according to an embodiment of the present application;

[0028] Figure 2 A partial enlarged view of part A according to an embodiment of the present application;

[0029] Figure 3 A front view cross-sectional structural schematic view of a sludge dewatering paving device according to an embodiment of the present application;

[0030] Figure 4 A side view structural schematic view of a sludge dewatering paving device according to an embodiment of the present application.

[0031] List of components and reference numerals:

[0032] 1. paving bed; 2. filter chamber; 3. filter cloth holder; 4. filter water basket; 5. tray; 6. lifting and lowering cylinder; 7. laser ranging piece; 8. paving part; 9. air cylinder; 10. first clamping part; 11. first supporting arm part; 12. second clamping part; 13. second supporting arm part; 14. connecting shaft; 15. protrusion; 16. groove. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the overall concept of the present application, the following detailed description will be made with reference to the accompanying drawings.

[0034] In order to more clearly illustrate the overall concept of the present application, the following detailed description will be made with reference to the accompanying drawings.

[0035] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0036] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0037] In addition, the terms "first", "second", etc. are used only to describe purposes and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] Embodiments of the present application disclose a paving method, comprising the following steps:

[0041] (1) The paving assembly advances to the pressure filtration cavity 2, and the filter cloth on the filter cloth shaft is bent and then continues to advance until the filter cloth covers the tray 5, and the filter cloth is fixed above the pressure filtration cavity 2;

[0042] (2) The paving assembly retreats, and the paving pipe discharges to pave during the retreating process. The tray 5 is lowered once by the lifting and lowering oil cylinder 6 for each paving layer;

[0043] (3) The time of lowering the tray 5 by the lifting and lowering oil cylinder 6 is adjusted once for each A layer of paving;

[0044] (4) after each paving is completed, the laser ranging device 7 measures the distance from the material surface to the filter basket 4 after the lifting and lowering cylinder 6 is lowered, and if the material height is higher than the basket opening of the filter basket 4, the lifting and lowering cylinder 6 drives the tray 5 to descend to ensure that the material does not exceed the basket opening of the filter basket 4;

[0045] (5) repeat (1)-(4) until the lifting and lowering cylinder 6 is at the bottom, and the laser ranging device 7 measures the distance from the material surface to the filter basket 4, and if the measured distance is greater than the set value B, the paving work is started;

[0046] (6) the distance measured by the laser ranging device 7 is calculated as the number of paving layers, and the corresponding number of layers is paved to complete the paving process.

[0047] Specifically, the distance from the material surface to the filter basket 4 is measured by the laser ranging device 7 to ensure that the material height is not higher than the basket opening of the filter basket 4, and after the lifting and lowering cylinder 6 is at the bottom, the distance from the material surface to the filter basket 4 is measured by the laser ranging device 7 to determine whether to start the paving program and the number of paving layers, so as to maximize the efficiency without production risk, and no longer rely on manual visual observation in real time.

[0048] Specifically, as the material is continuously paved, the weight of the material gradually increases, causing the height of the lifting and lowering cylinder 6 to gradually increase per unit time, so after the A layer is paved, the time for the lifting and lowering cylinder 6 to drive the tray 5 to descend needs to be adjusted to ensure that the descending height and the paving height are basically matched.

[0049] Specifically, the number of paving layers A and the set value B are not specifically limited, and a person skilled in the art can select them according to the actual situation.

[0050] Specifically, the number of paving layers is 10, and the set value B is 10 cm.

[0051] As an embodiment, the laser ranging device 7 is provided with two, which are respectively installed on both sides of the filter basket 4.

[0052] Specifically, the laser ranging device 7 is provided on both sides of the filter basket 4 and provided with two to ensure accurate measurement.

[0053] As an embodiment, the laser ranging device 7 is provided with two laser points; in step (4), the larger value of the two laser point measurement values is used; in step (5), the smaller value of the two laser point measurement values is used.

[0054] Specifically, in step (4), the larger value of the two laser point measurement values is used, and in step (5), the smaller value of the two laser point measurement values is used to ensure that the material height does not exceed the basket opening of the filter basket 4 and ensure production safety.

[0055] As an implementation, in step (4), if the laser distance measuring element 7 measures that the material surface is higher than the filter basket 4 for two times in succession, stop and alarm.

[0056] Specifically, in order to avoid the case that the tray 5 is lowered with errors in the material laying process, it is set that if the laser distance measuring element 7 measures that the material surface is higher than the filter basket 4 for two times in succession, stop and alarm, so as to avoid the occurrence of production accidents.

[0057] Reference Figures 1-4 The embodiment of the present application also discloses a material laying device for sludge dewatering, which comprises a material laying bed 1, a filter pressing cavity 2, a filter cloth rack 3 and a filter cloth pressing assembly, the filter pressing cavity 2 is internally provided with a filter basket 4 and a tray 5 assembly, the basket opening of the filter basket 4 is provided with a laser distance measuring element 7, the tray 5 assembly comprises the tray 5 and a lifting and lowering oil cylinder 6, the lifting and lowering oil cylinder 6 drives the tray 5 to make lifting and lowering movement in the filter pressing cavity 2; the filter cloth rack 3 provides filter cloth, the material laying bed 1 lays the filter cloth and sludge in the filter pressing cavity 2, and the filter cloth pressing assembly presses the filter cloth on the upper side of the filter pressing cavity 2.

[0058] Specifically, by arranging the laser distance measuring element 7, the material surface can be ensured to be not higher than the basket opening of the filter basket 4, and the production safety is ensured; by arranging the material laying bed 1 to lay the filter cloth and sludge in the filter pressing cavity 2, the sludge is laid between the filter cloths, so as to be subjected to subsequent filter pressing; by arranging the filter cloth pressing assembly, the air cylinder 9 is prevented from directly contacting the filter cloth, and the air cylinder 9 is prevented from being damaged due to the pulling of the filter cloth.

[0059] As an implementation, the material laying bed 1 is provided with a material laying part 8, and the material laying part 8 makes reciprocating movement on the material laying bed 1.

[0060] Specifically, when the material laying part 8 approaches the filter pressing cavity 2, the material laying part 8 folds the filter cloth on the filter cloth rack 3, and continues to advance, the filter cloth on the cloth winding shaft is gradually separated from the filter cloth rack 3, and under the action of the material laying part 8, the filter cloth is covered in the filter pressing cavity 2 layer by layer, the material laying device makes reciprocating movement, the filter cloth is laid when approaching the filter pressing cavity 2, and the material laying part 8 lays the sludge material when moving away from the filter pressing cavity 2.

[0061] As an implementation, the filter cloth pressing assembly comprises an air cylinder 9, a first pressing element, a second pressing element and a connecting shaft 14, the connecting shaft 14 connects the first pressing element and the second pressing element, one end of the air cylinder 9 is fixedly connected with the first pressing element, and the air cylinder 9 drives the first pressing element to control the included angle between the first pressing element and the second pressing element, so as to realize the pressing of the filter cloth.

[0062] Specifically, by arranging the first pressing member, the second pressing member and the connecting shaft 14 between the filter cloth and the air cylinder 9, the filter cloth and the air cylinder 9 are prevented from directly contacting each other, and the damage of the air cylinder 9 caused by the pulling force of the filter cloth is avoided. By arranging the first pressing member, the second pressing member and the connecting shaft 14, the connecting shaft 14 connects the first pressing member and the second pressing member to form a lever structure. The angle between the first pressing member and the second pressing member is changed by the force of the air cylinder 9, so as to control the opening and closing of the filter cloth pressing assembly. According to the lever principle, a small force can achieve a good filter cloth pressing effect.

[0063] As an implementation form, the first pressing member comprises a first clamping part 10 and a first arm part 11, and the second pressing member comprises a second clamping part 12 and a second arm part 13. The first clamping part 10 and the first arm part 11 are arranged on the two sides of the connecting shaft 14 respectively, and the second clamping part 12 and the second arm part 13 are arranged on the two sides of the connecting shaft 14 respectively.

[0064] Specifically, the length of the first clamping part 10 and the first arm part 11, and the length of the second clamping part 12 and the second arm part 13 are not limited in the present application, and can be selected by those skilled in the art according to actual conditions.

[0065] Specifically, the length of the first arm part 11 is greater than the length of the first clamping part 10.

[0066] As an implementation form, the second clamping part 12 and the second arm part 13 are fixed to the edge of the filter frame basket 4.

[0067] Specifically, the fixing method of the second clamping part 12 and the second arm part 13 is not limited in the present application, and can be selected by those skilled in the art according to actual conditions.

[0068] As an implementation form, a protrusion 15 is arranged on the first clamping part 10, and a groove 16 is arranged on the second clamping part 12. The position of the protrusion 15 corresponds to the position of the groove 16.

[0069] Specifically, the protrusion 15 and the groove 16 are consistent in size and shape, and can be fitted. The filter cloth is pressed between the protrusion 15 and the groove 16 to achieve a better pressing effect. The situation that the filter cloth slips out of the filter cloth pressing device due to the pulling of the filter cloth is effectively reduced, and the effect and efficiency of sludge dewatering are ensured.

[0070] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts of each of the embodiments can be referred to each other. Each of the embodiments mainly describes the difference from other embodiments. Especially, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the related parts can be referred to the part of the method embodiment.

[0071] The above merely provides an example of the present application, but is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A method of laying material, characterized by, The sludge dewatering paving device is used for paving, including the following steps: (1) The paving assembly advances to be close to the filter pressing cavity, the filter cloth on the filter cloth frame roll shaft is bent, and then the paving assembly continues to advance until the filter cloth covers the tray, and the filter cloth is fixed above the filter pressing cavity; (2) The paving assembly retreats, and the paving pipe discharges to pave during the retreating process, the tray is lowered once by the oil cylinder for each layer of paving; (3) For each layer of paving, the time of lowering the tray by the oil cylinder is adjusted once; (4) After the oil cylinder is lowered after each paving is completed, the laser ranging element measures the distance from the material surface to the filter water basket, if the material height is higher than the filter water basket basket opening, the tray is lowered by the oil cylinder to ensure that the material does not exceed the filter water basket basket opening; (5) Steps (1)-(4) are repeated until the oil cylinder is at the bottom, the laser ranging element measures the distance from the material surface to the filter water basket, and if the measured distance is greater than the set value B, the paving work is started; (6) The distance measured by the laser ranging element is calculated as the number of paving layers, and the corresponding number of layers is paved to complete the paving process; The sludge dewatering paving device comprises a paving bed, a filter pressing cavity, a filter cloth frame and a filter cloth pressing assembly; The filter cloth pressing assembly comprises a gas cylinder, a first pressing element, a second pressing element and a connecting shaft, the connecting shaft connects the first pressing element and the second pressing element, one end of the gas cylinder is fixedly connected with the first pressing element, and the gas cylinder pushes the first pressing element to control the included angle between the first pressing element and the second pressing element to realize the pressing of the filter cloth; The first pressing element comprises a first clamping part and a first arm part, the second pressing element comprises a second clamping part and a second arm part, and the first clamping part and the first arm part are respectively arranged on the two sides of the connecting shaft, and the second clamping part and the second arm part are respectively arranged on the two sides of the connecting shaft; The first clamping part is provided with a protrusion, the second clamping part is provided with a groove, and the position of the protrusion corresponds to the position of the groove.

2. A method of laying material according to claim 1, wherein, The laser ranging element is provided with two laser ranging elements which are respectively arranged on the two sides of the filter water basket.

3. A method of laying material according to claim 1, wherein, The laser ranging element is provided with two laser points, in step (4), the larger value of the two laser points is used, and in step (5), the smaller value of the two laser points is used.

4. A method of laying material according to claim 1, wherein, In step (4), if the material surface is higher than the filter water basket measured by the laser ranging element for two times, the machine is stopped and an alarm is given.

5. A paving device for dewatering sludge, characterized by The filter pressing cavity is provided with a filter water basket and a tray assembly, the basket opening of the filter water basket is provided with a laser ranging element, the tray assembly comprises a tray and a lifting oil cylinder, the lifting oil cylinder drives the tray to make lifting movement in the filter pressing cavity, the filter cloth frame provides filter cloth, the paving bed lays filter cloth and sludge in the filter pressing cavity, and the filter cloth pressing assembly presses the filter cloth above the filter pressing cavity; The filter cloth pressing assembly comprises a gas cylinder, a first pressing element, a second pressing element and a connecting shaft, the connecting shaft connects the first pressing element and the second pressing element, one end of the gas cylinder is fixedly connected with the first pressing element, and the gas cylinder pushes the first pressing element to control the included angle between the first pressing element and the second pressing element to realize the pressing of the filter cloth; The first pressing member comprises a first clamping part and a first supporting arm part; the second pressing member comprises a second clamping part and a second supporting arm part; the first clamping part and the first supporting arm part are respectively arranged on two sides of the connecting shaft; the second clamping part and the second supporting arm part are respectively arranged on two sides of the connecting shaft. A protrusion is arranged on the first clamping part, and a groove is arranged on the second clamping part; the position of the protrusion corresponds to the position of the groove.

6. The material spreading device for sludge dewatering according to claim 5, wherein A material laying part is arranged on the material laying bed, and the material laying part reciprocates on the material laying bed.

7. The material spreading device for sludge dewatering according to claim 5, wherein The second clamping part and the second supporting arm part are fixed to the edge of the water filtering basket.

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