A sludge continuous squeezing device with rollers

Abstract

The present invention introduces a continuous sludge extrusion device with rollers, which comprises a variable pitch stepped sludge concentrating device, a belt extrusion filter and a belt plate frame high-dryness press with rollers, wherein the outlet of the variable pitch stepped sludge concentrating device is located at the inlet of the belt extrusion filter, and the outlet of the belt extrusion filter is located at the inlet of the belt plate frame high-dryness press with rollers; the present application arranges a variable pitch stepped sludge concentrating device before the belt plate frame high-dryness press with rollers, and realizes the first progressive pressure extrusion by gradually reducing the pitch, and thereafter, a belt extrusion filter is further arranged to realize the secondary extrusion to further reduce the dryness of the sludge; finally, an upper roller extrusion assembly and a lower roller extrusion assembly are designed in the belt plate frame high-dryness press with rollers, and the upper roller extrusion assembly and the lower roller extrusion assembly are used to extrude the top of the pressing plate, thereby realizing continuous dehydration of the sludge and obtaining high-dryness sludge.

Description

Technical Field

[0001] The invention belongs to the field of sludge extrusion equipment manufacturing, and in particular relates to a sludge continuous extrusion device with a roller. Background Art

[0002] At present, traditional sludge dewatering technologies and equipment mainly include belt filter dewatering machine, centrifugal sedimentation filter and plate and frame filter, but their dewatering efficiency is very low and does not meet the national standards at all. Therefore, how to maximize the dewatering efficiency has become the focus of current research.

[0003] Chinese patent CN106630541A discloses a high-efficiency electro-osmosis sludge dewatering machine, which includes a frame, a sludge dewatering device, a driving mechanism for providing power to the sludge dewatering device, and a power supply. The sludge dewatering device includes multiple mobile mesh plates and multiple extrusion plates, both of which are made of conductive materials and are connected to the cathode and anode of the power supply respectively. A sludge extrusion channel extending in the horizontal direction is formed between the multiple extrusion plates and the multiple mobile mesh plates, and the sludge extrusion channel is continuously narrowed from its inlet end to the outlet end, wherein the sludge extrusion channel forms a rapid extrusion zone near the inlet end, and the narrowing rate of the sludge extrusion channel corresponding to the rapid extrusion zone is greater than the narrowing rate of other areas of the sludge extrusion channel. However, its driving power is large, the equipment price is high, and the moisture content of the filter cake is not ideal.

[0004] Chinese patent CN110217963B discloses a vertical sludge extrusion dewatering machine, comprising: a main body, including a first driving device and a plurality of dewatering components arranged vertically; each dewatering component comprises an upper die and a lower die, the upper die and the lower die can enclose an extrusion chamber for accommodating sludge after being closed, a piston chamber and an extrusion member are arranged on the upper die, the piston chamber can be connected to an external fluid power source, the extrusion member has a piston portion slidably arranged in the piston chamber and can move up and down in the extrusion chamber under the impetus of the fluid entering the piston chamber; the first driving device is used to drive each dewatering component to close or open the mold; a sludge supply device is connected to the extrusion chamber of each dewatering component and is used to transport sludge into the extrusion chamber; a water treatment device is connected to each dewatering component and is used to collect and treat water generated when each dewatering component extrudes sludge. It can effectively reduce equipment costs, improve operating efficiency and sludge dehydration rate, and reduce environmental pollution; however, because the dryness of the sludge is largely determined by the pressure of the sludge pump, the power consumption of the sludge pump is relatively large; and it cannot achieve continuous dehydration, resulting in a less than ideal moisture content in the filter cake.

[0005] Moreover, the above scheme only uses a single extrusion device for dehydration, which has only one step, which leads to a high moisture content of the filter cake after dehydration, which does not meet the national requirements. Therefore, Chinese patent CN205409612U designs an adjustable extruder extrusion device, which includes a screw and a barrel provided with a nozzle, the screw is rotatably arranged in the barrel, the barrel is provided with a threaded hole, and also includes a plurality of pressure regulating units, the pressure regulating unit includes a sliding plate, a pressure regulating plate and a screw rod, the pressure regulating plate is provided with a groove for sliding the sliding plate, the pressure regulating plate is provided with a threaded blind hole, one end of the screw rod is threadedly matched with the threaded hole and the threaded blind hole, and the other end is located outside the barrel, and the pressure regulating unit is surrounded by a barrel. Compared with the traditional extruder extrusion device, it only needs to rotate the screw rod to simply and conveniently adjust the gap between the pressure regulating plate and the screw rod, which effectively solves the problem that the pressure in the barrel cannot be adjusted according to the type of material. However, it also only uses a single step, and the pressure of the threaded extrusion is the same, which leads to the loss of the effect of subsequent extrusion, which seriously wastes power resources.

[0006] In the process of improving the sludge extrusion device, the stickiness of the sludge has also become a difficult point in improving the pressing plate. After one extrusion, the sludge often sticks to the inner wall of the pressing plate. At this time, the sludge needs to be manually shoveled off. Moreover, because the sludge on the top of the pressing plate will not be squeezed after passing through the pressing plate, the sludge is discontinuously dehydrated, which leads to the dryness of the sludge after compression not meeting the requirements. Therefore, a sludge dehydration device is designed to keep the pressing plate clean while consuming less energy, to achieve continuous dehydration of the sludge, and to achieve high dryness of the compressed sludge. How to further squeeze the sludge before the pressing plate is squeezed has become the top priority of the current preparation and research and development of sludge dehydration equipment. Summary of the invention

[0007] In order to solve the above problems, a sludge squeezing device is designed to achieve continuous dehydration of sludge with less energy consumption, and further squeeze the sludge before the pressing plate is squeezed, so as to finally achieve the balance of sludge dehydration and energy consumption while obtaining the effect of high-dryness sludge.

[0008] In order to achieve the above-mentioned effect, the present invention designs a sludge continuous squeezing device with a roller.

[0009] A continuous sludge extrusion device with rollers, comprising a variable pitch stepped sludge concentrating device, a belt extrusion filter and a belt plate frame high dryness press with rollers;

[0010] The outlet of the variable pitch stepped sludge concentrating device is located at the inlet of the belt squeeze filter;

[0011] The outlet of the belt-type squeeze filter is located at the inlet of a belt-type plate-frame high-dryness press with rollers.

[0012] Preferably, the belt-type plate-frame high-dryness press with rollers comprises a feed frame assembly, a discharge frame, an extrusion device with rollers, an upper filter belt and a lower filter belt;

[0013] The feed rack assembly is connected to the extrusion device with rollers through the upper filter belt and the lower filter belt;

[0014] The discharging frame is connected to the extrusion device with rollers through the upper filter belt and the lower filter belt;

[0015] The extrusion device with rollers comprises an extrusion external frame, a main support frame, an extrusion power pump, a pressing plate assembly and a roller extrusion assembly;

[0016] The main support frame, extrusion power pump, and pressure plate assembly are all located inside the extrusion external frame; the roller extrusion assembly is located in the middle of the pressure plate assembly;

[0017] The extrusion power pump is fixed in the main support frame, and its pull rod is connected to the pressure plate assembly.

[0018] Preferably, the variable pitch stepped sludge concentrating device comprises a truncated cone housing, a fourth rotating motor and a screw;

[0019] The truncated cone shell is hollow, and no top covers are provided at both ends;

[0020] The screw rod is located in the truncated cone housing;

[0021] The fourth rotating motor is connected to the screw rod via a transmission assembly;

[0022] The screw rod is provided with a continuous thread sheet, and the pitch of the thread sheet gradually decreases.

[0023] Preferably, the belt-type extrusion filter press comprises two belt-type extrusion filter belts and a filter belt conveyor, the filter belt conveyor comprises a third rotating motor and a transmission shaft, and the two belt-type extrusion filter belts share part of the transmission shaft.

[0024] Preferably, the pressure plate assembly comprises a plurality of pressure plates, and the connected pressure plates are connected via a transmission shaft;

[0025] The transmission shaft is formed by two connecting rods cross-connected by rotating bolts.

[0026] One end of the transmission shaft is connected to the side of the pressure plate by a rotating bolt; the other end of the transmission shaft is connected to the side of another connected pressure plate. A sludge continuous extrusion assembly with rollers according to claim 2 is characterized in that semicircular roller notches are respectively arranged on both sides of the bottom of the pressure plate.

[0027] Preferably, the roller extrusion assembly comprises an upper roller extrusion assembly and a lower roller extrusion assembly;

[0028] The upper roller extrusion assembly comprises a convex table extrusion piece and two upper connecting plates, wherein the bottoms of the two upper connecting plates are rotatably connected to the convex table extrusion piece, and the tops of the two upper connecting plates are rotatably connected to the tops of the adjacent pressing plates respectively;

[0029] The lower roller extrusion assembly comprises a roller and two lower connecting plates, wherein the tops of the two lower connecting plates are rotatably connected to the roller, and the bottoms of the two lower connecting plates are rotatably connected to the bottoms of adjacent pressing plates respectively.

[0030] Preferably, the feed rack assembly comprises a feed rack frame, a first rotating motor, a first rotating roller, a second rotating motor and a second rotating roller;

[0031] The first rotating motor is in transmission connection with the first rotating roller;

[0032] The second rotating motor is in transmission connection with the second rotating roller;

[0033] The feed rack frame includes an upper and lower layer, the width of the upper frame is smaller than the width of the lower frame, the first rotating motor is located in the upper frame, and the second rotating motor is located in the lower frame.

[0034] Preferably, the discharging rack comprises an upper and lower layer, and the width of the upper frame is smaller than that of the lower frame; filter belt auxiliary rollers are also provided in the feeding rack assembly and the discharging rack.

[0035] Preferably, the bottom of the upper filter belt passes through the gaps between the pressing plates in the pressing plate assembly in an S shape; and the top of the lower filter belt passes through the gaps between the pressing plates in the pressing plate assembly in an S shape.

[0036] Preferably, an intracellular water splitting device is further provided between the belt-type squeeze filter and the belt-type plate-and-frame high-dryness press with rollers.

[0037] The advantages and effects of this application are as follows:

[0038] 1. The present application designs a roller squeezing assembly, which includes a roller and a V-shaped scraper. The present application uses the V-shaped scraper to squeeze the top of the pressure plate, thereby achieving continuous dehydration of the sludge.

[0039] 2. The present application designs an upper filter belt and a lower filter belt, and wraps the sludge with the upper filter belt and the lower filter belt for squeezing, thereby saving energy and achieving high-dryness dehydration of the sludge, and finally discharging the sludge from the outlet of the discharge rack, thereby avoiding the sludge contaminating the press plate and causing manual cleaning of the press plate.

[0040] 3. The present application uses a variable pitch stepped sludge thickening device in front of a belt-type plate-frame high-dryness press with rollers. By gradually reducing the pitch, the first pressure progressive extrusion is achieved, which can reduce the sludge dryness by 4-5% before the pressing plate extrusion.

[0041] 4. The present application uses a belt-type plate-frame high-dryness press with rollers, and a variable pitch stepped sludge thickening device, and also arranges a belt-type extrusion filter to achieve secondary extrusion, which can reduce the dryness of the sludge.

[0042] 5. The present application uses an intracellular water splitting device disposed between the belt squeeze filter and the belt plate-frame high-dryness press with rollers, which can further split and discharge the intracellular water and further reduce the dryness of the sludge.

[0043] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings as follows.

[0044] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0046] Figure 1 A structural diagram of a sludge continuous extrusion device with rollers provided by the present invention;

[0047] Figure 2 A structural diagram of a belt-type plate-frame high-dryness press with rollers provided by the present invention;

[0048] Figure 3 A front view of the belt-type plate-frame high-dryness press with rollers provided by the present invention;

[0049] Figure 4 A cross-sectional view of a belt-type plate-frame high-dryness press with rollers provided by the present invention;

[0050] Figure numerals: 1. variable pitch stepped sludge thickening device; 2. belt extrusion filter; 3. belt plate frame high-dryness press with roller; 4. feed rack assembly; 5. discharge rack; 6. extrusion device with roller; 7. upper filter belt; 8. lower filter belt; 9. extrusion external frame; 10. main support frame; 11. extrusion power pump; 12. pressure plate assembly; 13. roller extrusion assembly; 14. truncated cone housing; 15. fourth rotating motor; 16. screw rod; 17. threaded sheet; 18. third rotating motor; 19. transmission shaft; 20. lower roller extrusion assembly; 21. feed rack frame; 22. first rotating motor; 23. first rotating roller; 24. second rotating motor; 25. second rotating roller. DETAILED DESCRIPTION

[0051] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all of the embodiments. In the following description, specific details such as specific configuration and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures is omitted in the embodiment.

[0052] It should be understood that the references to "one embodiment" or "this embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "one embodiment" or "this embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0053] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0054] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0055] The term "at least one" in this article is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0056] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0057] Example 1

[0058] This embodiment mainly introduces a belt-type plate-frame high-dryness press with rollers in a continuous sludge extrusion device with rollers. For the specific structure, please refer to Figure 2-4 , Figure 2 A structural diagram of a belt-type plate-frame high-dryness press with rollers provided by the present invention; Figure 3 A front view of the belt-type plate-frame high-dryness press with rollers provided by the present invention; Figure 4 A cross-sectional view of the belt-type plate-frame high-dryness press with rollers provided by the present invention.

[0059] A continuous sludge extrusion device with rollers, comprising a variable pitch stepped sludge concentrating device 1, a belt extrusion filter 2 and a belt plate frame high dryness press 3 with rollers;

[0060] The outlet of the variable pitch stepped sludge concentrating device 1 is located at the inlet of the belt squeeze filter 2;

[0061] The outlet of the belt-type squeeze filter 2 is located at the inlet of a belt-type plate-frame high-dryness press 3 with rollers.

[0062] Furthermore, the belt-type plate-frame high-dryness press 3 with rollers comprises a feed frame assembly 4, a discharge frame 5, an extrusion device with rollers 6, an upper filter belt 7 and a lower filter belt 8;

[0063] The feed rack assembly 4 is connected to the extrusion device 6 with rollers through the upper filter belt 7 and the lower filter belt 8;

[0064] The discharging frame 5 is connected to the extrusion device 6 with rollers through the upper filter belt 7 and the lower filter belt 8;

[0065] The extrusion device with roller 6 comprises an extrusion external frame 9, a main support frame 10, an extrusion power pump 11, a pressing plate assembly 12 and a roller extrusion assembly 13;

[0066] The main support frame 10, the extrusion power pump 11, and the pressure plate assembly 12 are all located inside the extrusion external frame 13; the roller extrusion assembly 13 is located in the middle of the pressure plate assembly 12;

[0067] The extrusion power pump 11 is fixed in the main support frame 9 , and its pull rod is connected to the pressure plate assembly 12 .

[0068] Furthermore, the variable pitch stepped sludge thickening device 1 comprises a truncated cone housing 14, a fourth rotating motor 15 and a screw 16;

[0069] The truncated cone housing 14 is hollow, and no top covers are provided at both ends;

[0070] The screw rod 16 is located in the truncated cone housing 14;

[0071] The fourth rotating motor 15 is connected to the screw rod 16 via a transmission assembly;

[0072] The screw rod 16 is provided with a continuous thread sheet 17 , and the pitch of the thread sheet 17 gradually decreases.

[0073] Furthermore, the belt-type extrusion filter 2 includes two belt-type extrusion filter belts and a filter belt conveyor. The filter belt conveyor includes a third rotating motor 18 and a transmission shaft. The two belt-type extrusion filter belts share part of the transmission shaft.

[0074] Furthermore, the pressure plate assembly 12 includes a plurality of pressure plates, and the connected pressure plates are connected via a transmission shaft 19;

[0075] The transmission shaft 19 is formed by two connecting rods cross-connected by rotating bolts.

[0076] One end of the transmission shaft 19 is connected to the side of the pressure plate by a rotating bolt; the other end of the transmission shaft 19 is connected to the side of another connected pressure plate. A sludge continuous extrusion assembly with rollers according to claim 2 is characterized in that semicircular roller notches are respectively arranged on both sides of the bottom of the pressure plate.

[0077] Further, the roller extrusion assembly 13 includes an upper roller extrusion assembly and a lower roller extrusion assembly 20;

[0078] The upper roller extrusion assembly includes a convex cone extrusion piece and two upper connecting plates, the bottoms of the two upper connecting plates are rotatably connected to the convex cone extrusion piece, and the tops are rotatably connected to the tops of adjacent pressure plates respectively; the two upper connecting plates form a V-shaped scraper.

[0079] The lower roller extrusion assembly 20 includes a roller and two lower connecting plates, the tops of the two lower connecting plates are rotatably connected to the rollers; the bottoms are rotatably connected to the bottoms of adjacent pressing plates respectively; the two lower connecting plates also form a V-shaped scraper.

[0080] Further, the feed rack assembly 4 includes a feed rack frame 21, a first rotating motor 22, a first rotating roller 23, a second rotating motor 24 and a second rotating roller 25;

[0081] The first rotating motor 22 is in transmission connection with the first rotating roller 23;

[0082] The second rotating motor 24 is in transmission connection with the second rotating roller 25;

[0083] The feed rack frame 21 includes an upper and lower layer, the width of the upper frame is smaller than the width of the lower frame, the first rotating motor 22 is located in the upper frame, and the second rotating motor 24 is located in the lower frame.

[0084] Furthermore, the discharging rack 5 includes two layers, an upper layer and an lower layer, and the width of the upper layer frame is smaller than that of the lower layer frame; the feeding rack assembly 4 and the discharging rack 5 are also provided with filter belt auxiliary rollers.

[0085] Furthermore, the bottom of the upper filter belt 7 passes through the gaps between the pressure plates in the pressure plate assembly 12 in an S shape; the top of the lower filter belt 8 passes through the gaps between the pressure plates in the pressure plate assembly 12 in an S shape.

[0086] Furthermore, an intracellular water splitting device is also provided between the belt-type squeeze filter 2 and the belt-type plate-frame high-dryness press 3 with rollers.

[0087] The present application designs a roller squeezing assembly, which includes a roller and a V-shaped scraper. The present application uses the V-shaped scraper to squeeze the top of the pressure plate, thereby achieving continuous dehydration of the sludge.

[0088] The present application designs an upper filter belt and a lower filter belt, and wraps the sludge with the upper filter belt and the lower filter belt for squeezing, thereby saving energy and achieving high-dryness dehydration of the sludge, and finally discharging the sludge from the outlet of the discharge rack, thereby avoiding the sludge contaminating the press plate and requiring manual cleaning of the press plate.

[0089] The present application uses an intracellular water splitting device disposed between the belt squeeze filter and the belt plate frame high-dryness press with rollers, which can achieve further splitting and discharge of the intracellular water and further reduce the dryness of the sludge.

[0090] Example 2

[0091] Based on the above embodiment 1, this embodiment mainly introduces the pre-order sludge squeezing device of the belt-type plate-frame high-dryness press with rollers. For the specific structure, please refer to Figure 1 , Figure 1 This is a structural diagram of a sludge continuous extrusion device with rollers provided by the present invention.

[0092] The outlet of the variable pitch stepped sludge concentrating device 1 is located at the inlet of the belt squeeze filter 2;

[0093] The outlet of the belt-type squeeze filter 2 is located at the inlet of a belt-type plate-frame high-dryness press 3 with rollers.

[0094] The variable pitch stepped sludge thickening device 1 comprises a truncated cone housing 14, a fourth rotating motor 15 and a screw rod 16;

[0095] The truncated cone housing 14 is hollow, and no top covers are provided at both ends;

[0096] The screw rod 16 is located in the truncated cone housing 14;

[0097] The fourth rotating motor 15 is connected to the screw rod 16 via a transmission assembly;

[0098] The screw rod 16 is provided with a continuous thread sheet 17 , and the pitch of the thread sheet 17 gradually decreases.

[0099] Furthermore, the belt-type extrusion filter 2 includes two belt-type extrusion filter belts and a filter belt conveyor. The filter belt conveyor includes a third rotating motor 18 and a transmission shaft. The two belt-type extrusion filter belts share part of the transmission shaft.

[0100] The present application uses a variable pitch stepped sludge thickening device in front of a belt-type plate-frame high-dryness press with rollers. By gradually reducing the pitch, the first pressure progressive extrusion is achieved, which can reduce the sludge dryness by 4-5% before the pressing plate extrusion.

[0101] The present application uses a belt-type plate-frame high-dryness press with rollers and a variable pitch stepped sludge thickening device before it, and also arranges a belt-type extrusion filter to achieve secondary extrusion, which can reduce the dryness of the sludge.

[0102] Example 3

[0103] Based on the above-mentioned embodiment 2, this embodiment mainly introduces a method for using a sludge continuous squeezing device with a roller.

[0104] First, the condensed sludge is first squeezed through the variable pitch stepped sludge thickening device. Since the screw rod is provided with continuous threaded sheets, the pitch of the threaded sheets gradually decreases, and the pressure becomes greater and greater. Therefore, during the squeezing process of the variable pitch stepped sludge thickening device, the dryness of the sludge will be reduced for the first time, which can be reduced by about 5%. Then the sludge is conveyed to the belt squeeze filter through the filter belt for the second squeezing to further reduce the dryness of the sludge. At this time, the sludge is conveyed by the filter belt to the belt plate frame high dryness press with rollers. Since the roller squeezing assembly includes a roller and a V-shaped scraper; further, the bottom of the V-shaped scraper is fixedly connected to the roller; and the top is located between the tops of adjacent pressing plates. The number of the roller squeezing assemblies is 2 groups; one group is fixed at the bottom of the crossbar of the extrusion external frame, and the other group is located on the main support frame. Further, the number of each group is multiple, and the specific location of its placement is between the tops of adjacent pressing plates when the pressing plate is fully pressed. After the sludge passes through the conveying space formed by the upper filter and the lower filter belt, it passes through the pressing plate assembly until the sludge fills the entire gap between the pressing plates. At this time, the first rotating motor and the second rotating motor stop running, and the extrusion power pump drives the pressing plate to compress to the limit position. At this time, the V-shaped scraper will also squeeze the top of the adjacent pressing plate, thereby achieving continuous dehydration of the sludge. When the extrusion is completed, the extrusion power pump drives the pressing plate back to the initial position. At this time, the first rotating motor and the second rotating motor start running again, thereby driving the high-dryness sludge that has been squeezed dry to be discharged.

[0105] The above description is only the preferred embodiment of the present invention, which does not limit the protection scope of the present invention. For those skilled in the art, the present invention can be modified and varied in various ways. Within the spirit and principle of the present invention, any change, modification, replacement, integration and parameter change of these embodiments by conventional substitution or capable of achieving the same function without departing from the principle and spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A sludge continuous extrusion device with rollers, characterized in that: It comprises a variable pitch stepped sludge thickening device (1), a belt-type squeeze filter (2) and a belt-type plate-frame high-dryness press with rollers (3); The outlet of the variable pitch stepped sludge concentrating device (1) is located at the inlet of the belt squeeze filter (2); The outlet of the belt-type squeeze filter (2) is located at the inlet of the belt-type plate-frame high-dryness press (3) with rollers; The belt-type plate-frame high-dryness press (3) with rollers comprises a feed frame assembly (4), a discharge frame (5), a pressing device with rollers (6), an upper filter belt (7) and a lower filter belt (8); The feed rack assembly (4) is connected to the extrusion device (6) with rollers via an upper filter belt (7) and a lower filter belt (8); The discharging frame (5) is connected to the extrusion device (6) with rollers via an upper filter belt (7) and a lower filter belt (8); The roller extrusion device (6) comprises an extrusion external frame (9), a main support frame (10), an extrusion power pump (11), a pressure plate assembly (12) and a roller extrusion assembly (13); The main support frame (10), the extrusion power pump (11), and the pressure plate assembly (12) are all located inside the extrusion external frame (9); the roller extrusion assembly (13) is located in the middle of the pressure plate assembly (12); The extrusion power pump (11) is fixed in the main support frame (10), and its pull rod is connected to the pressure plate assembly (12); The variable pitch stepped sludge concentrating device (1) comprises a truncated cone housing (14), a fourth rotating motor (15) and a screw rod (16); The truncated cone housing (14) is hollow, and no top covers are provided at either end; The screw rod (16) is located in the truncated cone housing (14); The fourth rotating motor (15) is connected to the screw rod (16) via a transmission assembly; The screw rod (16) is provided with a continuous thread sheet (17), and the pitch of the thread sheet (17) gradually decreases; The belt-type extrusion filter (2) comprises two belt-type extrusion filter belts and a filter belt conveyor, the filter belt conveyor comprises a third rotating motor (18) and a transmission shaft, and the two belt-type extrusion filter belts share part of the transmission shaft; The pressure plate assembly (12) comprises a plurality of pressure plates, and the connected pressure plates are connected via a transmission shaft (19); The transmission shaft (19) is formed by two connecting rods cross-connected by rotating bolts. One end of the transmission shaft (19) is connected to the side of the pressure plate by a rotating bolt; the other end of the transmission shaft (19) is connected to the side of another connected pressure plate; Semicircular roller notches are respectively arranged on both sides of the bottom of the pressing plate; The roller extrusion assembly (13) comprises an upper roller extrusion assembly and a lower roller extrusion assembly (20); The upper roller extrusion assembly includes a convex table extrusion piece and two upper connecting plates, the bottoms of the two upper connecting plates are rotatably connected to the convex table extrusion piece, and the tops are rotatably connected to the tops of adjacent pressing plates respectively, and the two upper connecting plates form a V-shaped scraper; The lower roller extrusion assembly (20) comprises a roller and two lower connecting plates, wherein the tops of the two lower connecting plates are rotatably connected to the rollers; and the bottoms are respectively rotatably connected to the bottoms of adjacent pressing plates, and the two lower connecting plates form a V-shaped scraper; The bottom of the upper filter belt (7) passes through the gaps between the pressure plates in the pressure plate assembly (12) in an S shape; the top of the lower filter belt (8) passes through the gaps between the pressure plates in the pressure plate assembly (12) in an S shape; An intracellular water splitting device is also provided between the belt-type squeeze filter (2) and the belt-type plate-frame high-dryness press (3) with rollers.

2. A sludge continuous squeezing assembly with rollers according to claim 1, characterized in that: The feed rack assembly (4) comprises a feed rack frame (21), a first rotating motor (22), a first rotating roller (23), a second rotating motor (24) and a second rotating roller (25); The first rotating motor (22) is transmission-connected to the first rotating roller (23); The second rotating motor (24) is in transmission connection with the second rotating roller (25); The feed rack frame (21) comprises an upper frame and a lower frame, the width of the upper frame is smaller than the width of the lower frame, the first rotating motor (22) is located in the upper frame, and the second rotating motor (24) is located in the lower frame.

3. The sludge continuous squeezing assembly with rollers according to claim 1, characterized in that: The discharging frame (5) comprises an upper and lower layer, the width of the upper frame being smaller than the lower frame; filter belt auxiliary rollers are also provided in the feeding frame assembly (4) and the discharging frame (5).

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