Sludge drying treatment equipment and treatment method based on negative pressure drainage and dehumidification

Abstract

The present invention relates to the technical field of sludge treatment, and specifically to sludge drying treatment equipment and a treatment method based on negative pressure drainage and dehumidification, comprising: a treatment tank, and a feed pipe and a discharge pipe fixedly installed on the side wall of the treatment tank, a partition fixed in the treatment tank, a processing pipe fixedly connected to the inner wall of the treatment tank fixed on the partition; a sieve plate fixedly installed in the processing pipe, a plurality of screening slots provided on the sieve plate, a two-way guiding mechanism connected to the sieve plate is provided in the processing pipe, a stirring scraper fitted with the sieve plate is connected to the two-way guiding mechanism; a conduction and discharge mechanism is provided in the processing pipe and connected to the two-way guiding mechanism; an opening and closing component is provided on the processing pipe, a pushing mechanism is provided on the two-way guiding mechanism, a pushing plate matched with the sieve plate and the opening and closing component is connected to the pushing mechanism, the application can perform dual operations of pressure filtration and negative pressure suction on the sludge by adjusting the conduction state of the processing pipe, so as to ensure that the water in the sludge is completely separated.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and in particular to sludge drying treatment equipment and a treatment method based on negative pressure drainage and moisture removal. Background Art

[0002] Sludge is an ultrafine powder with a high organic matter content. Sludge drying is a common sludge treatment technology that converts the water in the sludge into a stable dry substance by evaporating or filtering it out.

[0003] Converting sludge into usable dry products can not only reduce environmental pollution, but also realize the recycling of resources and contribute to sustainable development. When choosing a sludge drying method, comprehensive consideration should be given to factors such as the nature of the sludge, processing volume, and investment cost to select the most suitable sludge drying method.

[0004] When the sludge is treated by mechanical filtration, it is usually treated by continuously stirring the sludge and providing a certain pressure so that the residual water in the sludge can be discharged through the filter plate. However, this method only applies force to the sludge in one direction. Since the fluidity of the sludge is not high, if a small pressure is applied to the sludge, the drying effect is not good. If the applied pressure is too high, the filter holes will be blocked. Summary of the invention

[0005] The object of the present invention is to provide a sludge drying treatment device and a treatment method based on negative pressure drainage and moisture removal, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] Sludge drying treatment equipment based on negative pressure drainage and dehumidification, including:

[0008] A processing tank, and a feed pipe and a discharge pipe fixedly mounted on the side wall of the processing tank, a partition fixed in the processing tank, and a processing pipe fixedly connected to the inner wall of the processing tank fixed on the partition;

[0009] Also includes:

[0010] A sieve plate is fixedly installed in the processing tube, a plurality of sieving slots are provided on the sieve plate, a bidirectional guiding mechanism connected to the sieve plate is provided in the processing tube, a stirring scraper in contact with the sieve plate is connected to the bidirectional guiding mechanism, the bidirectional guiding mechanism can perform bidirectional pressure filtration and adsorption treatment on the sludge on the sieve plate, and drive the stirring scraper to move, so as to scrape off the sludge remaining on the sieve plate;

[0011] A conduction discharge mechanism is arranged in the processing tube and connected to the bidirectional guide mechanism, and the conduction discharge mechanism can be operated when the bidirectional guide mechanism moves to adjust the conduction state of the bottom of the processing tube according to the sludge drying state in the processing tube;

[0012] An opening and closing assembly is arranged on the processing tube, and a pushing mechanism is arranged on the bidirectional guiding mechanism. A pushing plate cooperating with the screen plate and the opening and closing assembly is connected to the pushing mechanism. When the bidirectional guiding mechanism moves, the pushing mechanism can drive the pushing plates to move toward or away from each other to push the sludge stacked on the screen plate into the processing tank.

[0013] As a further solution of the present invention: the bidirectional guiding mechanism includes a rotating rod rotatably installed in the processing tube and passing through the screen plate, symmetrically arranged guide columns are fixed in the processing tube, and a pressurized release component connected to the guide columns is arranged on the rotating rod.

[0014] As a further solution of the present invention: the pressurized release component includes a first annular groove opened on the rotating rod, a sealing disk slidably mounted on the rotating rod and slidably connected to the guide column, a first limit block slidably engaged with the first annular groove is fixed to the inner wall of the sealing disk, and a negative pressure suction structure is arranged on the rotating rod.

[0015] As a further solution of the present invention: the negative pressure suction structure includes a support rod fixedly installed in the processing tube and fixedly connected to the screen plate, a piston disk slidably installed on the support rod and slidably connected to the rotating rod, a second annular groove is formed on the rotating rod, and a third limit block slidably engaged with the second annular groove is fixed to the inner wall of the piston disk.

[0016] As a further solution of the present invention: the conduction and discharge mechanism includes a conduction groove provided on the piston disc, a blocking disc which abuts against the piston disc is sleeved on the support rod, a conduction hole which matches the conduction groove is provided on the blocking disc, and a limit assembly connected with the blocking disc is provided on the support rod;

[0017] It also includes a second water outlet groove opened at the bottom of the processing tube, and a first water outlet groove connected to the second water outlet groove is opened on the partition.

[0018] As a further solution of the present invention: the limiting assembly includes a spring sleeved on the support rod and abutting against the blocking disk, the support rod is provided with a groove, and the blocking disk is fixed with a protruding column that slides and engages with the groove.

[0019] As a further solution of the present invention: the opening and closing component includes a discharge groove opened on the circumferential outer wall of the processing tube, symmetrically arranged cylinders are fixed on the processing tube, and a sealing ring slidingly sealed with the processing tube is fixed on the output end of the cylinder, and the sealing ring cooperates with the discharge groove.

[0020] As a further solution of the present invention: the pushing mechanism includes a guide groove opened on the rotating rod, a connecting plate is slidably installed on the guide column, a movable sleeve slidably connected to the rotating rod is fixed on the connecting plate, a second limit block slidably engaged with the guide groove is fixed on the inner wall of the movable sleeve, and a driven component connected to the rotating rod is provided on the movable sleeve.

[0021] As a further solution of the present invention: the driven component includes a limit groove opened on the outer wall of the rotating rod, a rotating sleeve mounted on the rotating rod is rotatably installed on the movable sleeve, a limit rod slidably connected to the limit groove is fixed to the inner wall of the rotating sleeve, and a connecting rod hinged to the push plate is hinged on the outer wall of the rotating sleeve.

[0022] The sludge drying treatment method based on negative pressure drainage and moisture removal includes the following steps:

[0023] Step 1: The sludge to be treated is transported into the treatment tank through the feed pipe, and the sludge falls on the screen plate under the action of the two-way guiding mechanism;

[0024] Step 2: The two-way guide mechanism will also drive the conduction discharge mechanism to move, ensuring that the two-way guide mechanism can provide downward pressure and suction to the sludge on the screen plate, so that the water in the sludge can be discharged through the screening slot;

[0025] Step 3: After the sludge treatment is completed, the processing pipe is opened under the action of the opening and closing component. At this time, the two-way guiding mechanism will drive the push plate to move through the pushing mechanism to push the sludge accumulated on the screen plate into the treatment tank;

[0026] Step 4: At the same time, the bidirectional guiding mechanism will also control the movement of the conducting discharge mechanism so that the separated water is discharged into the treatment tank through the processing pipe.

[0027] Compared with the prior art, the beneficial effects of the present invention are: the present application can provide downward pressure and adsorption force on the sludge on the screen plate. Under the effect of the dual force, the sludge drying rate is faster and the drying effect is better. When the two-way guiding mechanism is working, the conduction state of the processing tube can be adjusted to intermittently transport the sludge to be treated into the processing tube. At the same time, under the action of the two-way guiding mechanism and the conduction regulating mechanism, the sludge is subjected to a two-way force. Compared with traditional treatment equipment, the treatment rate and treatment effect of sludge drying are accelerated.

[0028] The rotation of the stirring scraper can also be controlled by the two-way guiding mechanism. Under the action of the stirring scraper, the sludge adhering to the screen plate is continuously cleaned, which can prevent the sludge from adhering to the screening slot due to pressure and adsorption force, causing the screening slot to be blocked, and can also provide a certain stirring force for the sludge, ensuring a more complete sludge drying process.

[0029] Through the cooperation of the two-way guiding mechanism and the pushing mechanism, the pushing plate is controlled to push the sludge accumulated on the screen plate into the processing tank, so as to realize automatic cleaning of the sludge and prevent the subsequent undried sludge from accumulating on the dried sludge due to the failure to clean the sludge in time, resulting in the problem that the subsequent sludge cannot be dried, thereby achieving the purpose of continuous automatic drying of the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an embodiment of a sludge drying treatment equipment based on negative pressure drainage and dehumidification.

[0031] Figure 2 It is a schematic diagram of the cross-sectional structure of the processing tank and the processing pipe in an embodiment of the sludge drying treatment equipment based on negative pressure drainage and dehumidification.

[0032] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at point A in the middle.

[0033] Figure 4 It is a structural schematic diagram of the opening and closing components, processing pipes, and part of the two-way guiding mechanism in an embodiment of the sludge drying treatment equipment based on negative pressure drainage and dehumidification.

[0034] Figure 5 It is a schematic diagram of the structure inside the processing tube in an embodiment of the sludge drying treatment equipment based on negative pressure drainage and dehumidification.

[0035] Figure 6 It is a schematic diagram of a partial half-section structure of an embodiment of a sludge drying treatment equipment based on negative pressure drainage and dehumidification.

[0036] Figure 7 It is a schematic diagram of the exploded structure of part of the bidirectional guiding mechanism and part of the pushing mechanism in an embodiment of the sludge drying treatment equipment based on negative pressure drainage and dehumidification.

[0037] Figure 8 for Figure 7 A magnified schematic diagram of the structure at point B in the middle.

[0038] Fig. 9 It is a schematic diagram of the connection relationship between some pushing mechanisms, conduction and discharge mechanisms, and rotating rods in an embodiment of a sludge drying treatment equipment based on negative pressure drainage and dehumidification.

[0039] Fig.10It is a schematic diagram of the explosion structure of the conduction and discharge mechanism in an embodiment of the sludge drying treatment equipment based on negative pressure drainage and dehumidification.

[0040] In the figure: 1, treatment tank; 101, feed pipe; 102, discharge pipe; 2, partition; 201, first water outlet trough; 3, processing pipe; 301, discharge trough; 302, second water outlet trough; 4, cylinder; 5, blocking ring; 6, sieve plate; 601, screening trough; 7, rotating rod; 701, arc annular groove; 702, first spiral groove; 703, second spiral groove; 8, guide column; 9, first annular groove; 10. Second annular groove; 11. Sealing disk; 12. First limiting block; 13. Stirring scraper; 14. Connecting plate; 15. Movable sleeve; 16. Second limiting block; 17. Rotating sleeve; 18. Connecting rod; 19. Push plate; 20. Support rod; 2001. Groove; 21. Piston disk; 2101. Conducting groove; 22. Third limiting block; 23. Sealing disk; 2301. Conducting hole; 24. Spring. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0043] See also Figures 1 to 10 In an embodiment of the present invention, a sludge drying treatment device based on negative pressure drainage and moisture removal includes:

[0044] A processing tank 1, and a feed pipe 101 and a discharge pipe 102 fixedly mounted on the side wall of the processing tank 1, a partition 2 fixed inside the processing tank 1, and a processing pipe 3 fixedly connected to the inner wall of the processing tank 1 fixed on the partition 2;

[0045] Among them, the partition 2 and the processing tube 3 divide the processing tank 1 into three spaces. The cavity at the bottom of the partition 2 is used to discharge water in the sludge, the cavity between the partition 2 and the processing tube 3 is used to receive the dehydrated sludge, and the cavity above the processing tube 3 is used to receive the sludge to be processed. The feed pipe 101 is used to transport the sludge to be processed, and the discharge pipe 102 is used to discharge the dehydrated sludge.

[0046] Also includes:

[0047] See also Figure 1 , Figure 2 , Figure 4-Figure 7 , the sieve plate 6 is fixedly installed in the processing tube 3, and a plurality of screening slots 601 are opened on the sieve plate 6. A two-way guiding mechanism connected to the sieve plate 6 is arranged in the processing tube 3, and a stirring scraper 13 in contact with the sieve plate 6 is connected to the two-way guiding mechanism. The two-way guiding mechanism can perform two-way pressure filtration and adsorption treatment on the sludge on the sieve plate 6, and drive the stirring scraper 13 to move so as to scrape off the sludge remaining on the sieve plate 6. The two-way guiding mechanism includes a rotating rod 7 rotatably installed in the processing tube 3 and passing through the sieve plate 6. A symmetrically arranged guide column 8 is fixed in the processing tube 3, and a pressurized release component connected to the guide column 8 is arranged on the rotating rod 7, which In the embodiment, the pressurized release assembly includes a first annular groove 9 opened on the rotating rod 7, a sealing disk 11 slidably mounted on the rotating rod 7 and slidably connected to the guide column 8, a first limit block 12 slidably engaged with the first annular groove 9 is fixed to the inner wall of the sealing disk 11, and a negative pressure suction structure is provided on the rotating rod 7. The negative pressure suction structure mentioned above includes a support rod 20 fixedly mounted in the processing tube 3 and fixedly connected to the screen plate 6, a piston disk 21 slidably connected to the rotating rod 7 is slidably mounted on the support rod 20, a second annular groove 10 is opened on the rotating rod 7, and a third limit block 22 slidably engaged with the second annular groove 10 is fixed to the inner wall of the piston disk 21.

[0048] In detail, the processing tube 3 can be divided into two parts, the upper part is the top of the processing tube 3, which is arranged in a conical opening shape, and the size of this part is larger than the size of the tube body of the lower part of the processing tube 3. The first annular groove 9 and the second annular groove 10 are both composed of two symmetrically arranged spiral grooves, and the number of spiral turns of the spiral groove is half a circle. The size of the sealing disk 11 is the same as the inner diameter of the lower part of the processing tube 3. Therefore, the sealing disk 11 is connected to the lower part of the processing tube 3 in a sliding seal. The size of the sealing disk 11 is smaller than the size of the upper part of the processing tube 3. In the initial state, the first limit block 12 is located in the first annular groove 9 toward the processing tube 3. At the end of the stroke in the direction of the top of the tank 1, the sealing disk 11 is located at the upper part of the processing tube 3. At this time, the top of the processing tube 3 is in a conducting state, and the third limit block 22 is located at the end of the stroke in the direction of the second annular groove 10 away from the bottom of the processing tank 1. Under the action of the conducting discharge mechanism, the piston disk 23 is in a conducting state. Therefore, the water separated from the sludge can be discharged to the bottom of the processing tank 1 through the conducting discharge mechanism. When the sludge needs to be dried, the sludge to be treated can be transported to the processing tank 1 through the feeding pipe 101. The sludge will enter through the gap between the sealing disk 11 and the processing tube 3. The sludge enters the processing tube 3 and falls onto the sieve plate 6. At this time, the water contained in the sludge will enter the top of the piston disc 21 through the screening groove 601. In order to ensure that the water in the sludge is completely screened, it is necessary to pressurize the top of the sludge and perform negative pressure suction at the bottom. At this time, the rotating rod 7 rotates and drives the first annular groove 9 and the second annular groove 10 to move. Under the action of the first annular groove 9 and the first limit block 12, the sealing disc 11 moves along the length direction of the guide column 8 and moves toward the bottom of the processing tube 3. Under the action of the second annular groove 9 and the third limit block 22, the piston disc 23 moves toward the processing tank. 1 moves in the bottom direction. When the sealing disc 11 is separated from the upper part of the processing tube 3 and enters the lower part of the processing tube 3, the sealing disc 11 fits with the inner wall of the processing tube 3 and pressurizes the sludge on the sieve plate 6. At the same time, with the movement of the piston disc 23, under the action of the conduction discharge mechanism, the piston disc 23 is in a blocked state. When the piston disc 23 moves, negative pressure will be generated, and the sludge on the sieve plate 6 will be adsorbed. Under the dual forces of pressurizing the upper part of the sludge and sucking the lower part, it is ensured that the water in the sludge quickly passes through the screening slot 601 and enters the upper part of the piston disc 23, and the sludge is completely dehydrated.

[0049] Preferably, when the first limit block 12 and the third limit block 22 move to the end of the stroke on the other side of the first annular groove 9 and the second annular groove 10 respectively, the sludge drying process is completed. At this time, the rotating rod 7 continues to rotate, so that the sealing disk 11 and the piston disk 23 move toward the initial position. When the sealing disk 11 returns to the upper part of the processing tube 3 again, the sludge to be treated will enter the processing tube 3 again through the gap between the sealing disk 11 and the processing tube 3, and the above steps are repeated to achieve the effect of drying the sludge.

[0050] Among them, the conduction state of the processing tube 3 can be controlled by the sealing disk 11, so as to control the addition of the sludge to be treated. In the initial state, the sludge has a high water content. When the sludge falls on the top of the screen plate 6, it may splash onto the barrel wall of the processing tube 3. During the movement of the sealing disk 11, the splashed sludge can also be scraped off to ensure that the sludge is fully treated. The movement of the sealing disk 11 can change the pressure in the processing tube 3, thereby providing a two-way force to the sludge. Compared with traditional treatment equipment, the treatment rate and treatment effect of the sludge drying are accelerated. The rotating rod 7 will also drive the stirring scraper 13 to move. Under the action of the stirring scraper 13, the sludge adhered to the screen plate 6 is continuously cleaned, which can prevent the sludge from adhering to the screening slot 601 due to pressure and adsorption force, causing the screening slot 601 to be blocked, and can provide a certain stirring force to the sludge to ensure that the sludge drying treatment is more complete.

[0051] See also Figure 2 , Figure 5-Figure 7 , Fig. 9 , Fig.10 , a conduction discharge mechanism is arranged in the processing tube 3 and connected to the bidirectional guide mechanism. The conduction discharge mechanism can be actuated when the bidirectional guide mechanism moves to adjust the conduction state at the bottom of the processing tube 3 according to the sludge drying state in the processing tube 3. The conduction discharge mechanism includes a conduction groove 2101 provided on the piston disk 21, a blocking disk 23 that contacts and cooperates with the piston disk 21 is sleeved on the support rod 20, and a conduction plate 23 that cooperates with the conduction groove 2101 is provided on the blocking disk 23. Hole 2301, a limiting assembly connected to the sealing disk 23 is arranged on the support rod 20; it also includes a second water outlet trough 302 opened at the bottom of the processing tube 3, and a first water outlet trough 201 connected to the second water outlet trough 302 is opened on the partition 2, wherein the limiting assembly includes a spring 24 which is sleeved on the support rod 20 and abuts against the sealing disk 23, a groove 2001 is opened on the support rod 20, and a protruding column which slides and fits with the groove 2001 is fixed on the sealing disk 23.

[0052] It should be noted that in order to ensure the continuous drying of the sludge, the filtered water needs to be discharged. In the initial state, the piston disc 21 and the sealing disc 11 are at the end of the stroke away from the bottom of the treatment tank 1, and the spring 24 is in a compressed state, so that the sealing disc 23 is also at the end of the stroke away from the bottom of the treatment tank 1. At this time, the protruding column is located at the end of the stroke on one side of the groove 2001, the sealing disc 23 and the piston disc 21 are in a separated state, and the conducting groove 2101 and the conducting hole 2301 are both in a conducting state. The water separated by the screening groove 601 will be transported to the bottom of the processing tube 3 through the conducting groove 2101 and the conducting hole 2301, and will be transported to the bottom of the treatment tank 1 through the first water outlet groove 201 and the second water outlet groove 302. When the sludge needs to be dried, at this time, the rotating rod 7 rotates and drives the first annular groove 9 and the second annular groove 10 to move. Under the action of the first limit block 12 and the third limit block 22, the sealing disc 11 and the piston disc 21 move synchronously toward the bottom of the treatment tank 1. When When the sealing disc 11 is separated from the upper part of the processing tube 3 and enters the lower part of the processing tube 3, the sealing disc 11 will pressurize the sludge on the sieve plate 6. At the same time, when the piston disc 21 moves to the position of abutting the blocking disc 23, the conducting groove 201 and the conducting hole 2301 will be in a blocked state. The piston disc 21 continues to move and drives the blocking disc 23 to move synchronously, so that the spring 24 is compressed. At this time, the piston disc 21 will form a negative pressure under the sieve plate 6. Through the dual effects of pressurization and negative pressure, the speed of Regarding the drying rate of the sludge, when the drying is completed, under the action of the first annular groove 9 and the second annular groove 10, the sealing disk 11 and the piston disk 21 are controlled to move toward the initial position, and the spring 24 is elastically released, so that the sealing disk 23 moves synchronously with the piston disk 21 until the protruding column returns to the end of the stroke on the side of the through hole 2301 again, the sealing disk 23 no longer moves, and the piston disk 21 continues to move, so that the through groove 2101 and the through hole 2301 are connected, and the wastewater on the piston disk 21 can be discharged again.

[0053] Preferably, the movement of the piston disk 21 and the sealing disk 11 can be controlled by rotating the rotating rod 7, and the conduction state of the piston disk 21 can be controlled when the piston disk 21 moves, so as to realize the dual forces of pressure and attraction provided to the sludge during the sludge drying process, thereby ensuring a high sludge drying rate and a better drying effect. At the same time, the water released by the sludge drying can be automatically discharged according to the conduction state of the piston disk 21, so as to prevent the water from always accumulating above the piston disk 21 and causing the water to attract the water in the sludge to deteriorate, and to prevent the water from flowing back into the sludge through the screening slot 601.

[0054] See also Figure 2 , Figure 4, an opening and closing component is arranged on the processing tube 3, and the opening and closing component includes a discharge groove 301 opened on the circumferential outer wall of the processing tube 3, and a symmetrically arranged cylinder 4 is fixed on the processing tube 3, and a sealing ring 5 that is slidingly sealed and connected to the processing tube 3 is fixed on the output end of the cylinder 4, and the sealing ring 5 cooperates with the discharge groove 301.

[0055] Furthermore, in the initial state, under the action of the cylinder 4, the discharge groove 301 is controlled to be in a blocked state through the sealing ring 5. When the dried sludge needs to be discharged, the cylinder 4 works and drives the sealing ring 5 to move. At this time, the dried sludge can be discharged into the treatment tank 1 through the discharge groove 301.

[0056] See also Figure 2 , Figure 3 , Figure 5-Figure 9 The two-way guiding mechanism is provided with a pushing mechanism, and the pushing mechanism is connected with a pushing plate 19 that cooperates with the sieve plate 6 and the opening and closing assembly. The pushing mechanism can drive the pushing plate 19 to move toward or away from each other when the two-way guiding mechanism moves, so as to push the sludge stacked on the sieve plate 6 into the processing tank 1. The pushing mechanism includes a guide groove provided on the rotating rod 7, and a connecting plate 14 is slidably mounted on the guide column 8, and a movable plate 14 is fixed on the connecting plate 14 that is slidably connected to the rotating rod 7. A movable sleeve 15, a second limit block 16 slidably engaged with the guide groove is fixed on the inner wall of the movable sleeve 15, a driven component connected to the rotating rod 7 is arranged on the movable sleeve 15, wherein the driven component includes a limit groove provided on the outer wall of the rotating rod 7, a rotating sleeve 17 sleeved on the rotating rod 7 is rotatably mounted on the movable sleeve 15, a limit rod slidably connected to the limit groove is fixed on the inner wall of the rotating sleeve 17, and a connecting rod 18 hinged to the outer wall of the rotating sleeve 17 is hinged to the push plate 19.

[0057] Furthermore, the guide groove can be divided into multiple sections, namely, an arcuate annular groove 701, a first spiral groove 702, and a second spiral groove 703, and the arcuate annular groove 701, the first spiral groove 702, and the second spiral groove 703 are connected to each other in sequence. In the initial state, the second limit block 16 is located in the arcuate annular groove 701, so that the movable sleeve 15 and the connecting plate 14 are located at the end of the stroke toward the top of the processing tube 3, and the movable sleeve 15 can also control the push plate 19 to be located at the end of the stroke in the direction of approaching each other by rotating the sleeve 17 and the connecting rod 18. At this time, one side of the push plate 19 is in contact with the stirring scraper 13. When the rotating rod 7 rotates, the sealing plate 11 and the piston plate 21 are driven to move to provide a two-way effect on the sludge. The rotating rod 7 will also drive the guide groove to move, so that the second limit block 16 slides in the arc annular groove 701. When the sludge is dried, the cylinder 4 will drive the sealing ring 5 to move, so that the discharge groove 301 is connected, and the rotating rod 7 continues to rotate, so that the sealing plate 11 and the piston plate 21 move toward the initial position. At the same time, the rotating rod 7 will also drive the guide groove to continue to move. , the second limit block 16 will be out of the arc annular groove 701, and enter the first spiral groove 702, so that the movable sleeve 15 and the connecting plate 14 move toward the bottom of the processing tube 3, and the movable sleeve 15 will also drive the rotating sleeve 17 to move, and push the push plate 19 to move through the connecting rod 18, and push the sludge remaining on the screen plate 6 into the processing tank 1 through the discharge groove 301. When the second limit block 16 moves to the position where the first spiral groove 702 and the second spiral groove 703 are connected, the push plate 19 moves to the end of the stroke in the direction away from each other. At this time, the second limit block 16 moves to the position where the first spiral groove 702 and the second spiral groove 703 are connected, and the push plate 19 moves to the end of the stroke in the direction away from each other. The second limit block 16 will enter the second spiral groove 703, causing the push plate 19 to move toward the initial position until the second limit block 16 disengages from the second spiral groove 703 and returns to the arc-shaped annular groove 701. The sludge cleaning is completed. Under the action of the cylinder 4, the discharge groove 301 is blocked again by the sealing ring 5. At this time, the sealing disk 11 is still located at the lower part of the processing tube 3 to ensure that untreated sludge will not enter the processing tube 3 when cleaning the sludge. Repeat the above steps to achieve the effect of automatically discharging the sludge after the sludge drying is completed.

[0058] Preferably, by cooperating with the second limit block 16 and the guide groove, after the sludge drying is completed, the push plate 19 can be controlled to push the sludge from the screen plate 6 into the treatment tank 1, so that the sludge can be automatically cleaned, and the problem of subsequent undried sludge not being able to be dried due to the failure to clean the sludge in time can be prevented, thereby achieving the purpose of continuous automatic drying of the sludge.

[0059] The sludge drying treatment method based on negative pressure drainage and moisture removal includes the following steps:

[0060] Step 1: The sludge to be treated is transported to the treatment tank 1 through the feed pipe 101, and the sludge falls onto the screen plate 6 under the action of the two-way guiding mechanism;

[0061] Step 2: The bidirectional guide mechanism also drives the conduction discharge mechanism to move, ensuring that the bidirectional guide mechanism can provide downward pressure and suction to the sludge on the screen plate 6, so that the water in the sludge is discharged through the screening slot 601;

[0062] Step 3: After the sludge treatment is completed, the processing pipe 3 is turned on by the opening and closing assembly. At this time, the two-way guiding mechanism will drive the push plate 19 to move through the pushing mechanism to push the sludge accumulated on the screen plate 6 into the processing tank 1;

[0063] Step 4: At the same time, the bidirectional guiding mechanism will also control the movement of the conducting discharge mechanism so that the separated water is discharged into the processing tank 1 through the processing pipe 3 .

[0064] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0065] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Sludge drying treatment equipment based on negative pressure drainage and dehumidification, including: A processing tank (1), and a feed pipe (101) and a discharge pipe (102) fixedly mounted on the side wall of the processing tank (1); a partition (2) is fixed inside the processing tank (1); and a processing pipe (3) fixedly connected to the inner wall of the processing tank (1) is fixed on the partition (2); It is characterized by further comprising: A sieve plate (6) is fixedly mounted in the processing tube (3), a plurality of sieving slots (601) are provided on the sieve plate (6), a bidirectional guiding mechanism connected to the sieve plate (6) is provided in the processing tube (3), a stirring scraper (13) in contact with the sieve plate (6) is connected to the bidirectional guiding mechanism, the bidirectional guiding mechanism is capable of performing bidirectional pressure filtration and adsorption treatment on the sludge on the sieve plate (6), and driving the stirring scraper (13) to move so as to scrape off the sludge remaining on the sieve plate (6); a conduction discharge mechanism, arranged in the processing tube (3) and connected to the bidirectional guide mechanism, the conduction discharge mechanism being capable of operating when the bidirectional guide mechanism moves, so as to adjust the conduction state of the bottom of the processing tube (3) according to the drying state of the sludge in the processing tube (3); an opening and closing assembly, arranged on the processing tube (3), the bidirectional guiding mechanism being provided with a pushing mechanism, the pushing mechanism being connected with a pushing plate (19) cooperating with the sieve plate (6) and the opening and closing assembly, the pushing mechanism being capable of driving the pushing plate (19) to move towards or away from each other when the bidirectional guiding mechanism moves, so as to push the sludge stacked on the sieve plate (6) into the processing tank (1); The bidirectional guiding mechanism comprises a rotating rod (7) rotatably mounted in the processing tube (3) and penetrating the sieve plate (6); guide columns (8) symmetrically arranged are fixed in the processing tube (3); and a pressure release assembly connected to the guide columns (8) is arranged on the rotating rod (7); The pressurized release assembly comprises a first annular groove (9) formed on the rotating rod (7); a sealing disk (11) slidably mounted on the rotating rod (7) and slidably connected to the guide column (8); a first limit block (12) slidably engaged with the first annular groove (9) is fixed to the inner wall of the sealing disk (11); and a negative pressure suction structure is provided on the rotating rod (7); The negative pressure suction structure comprises a support rod (20) fixedly mounted in the processing tube (3) and fixedly connected to the screen plate (6); a piston disc (21) slidably mounted on the support rod (20) and slidably connected to the rotating rod (7); a second annular groove (10) is formed on the rotating rod (7); and a third limit block (22) slidably engaged with the second annular groove (10) is fixed on the inner wall of the piston disc (21); The conduction and discharge mechanism comprises a conduction groove (2101) formed on the piston disc (21); a blocking disc (23) is sleeved on the support rod (20) and is in contact with the piston disc (21); a conduction hole (2301) is formed on the blocking disc (23) and is in contact with the conduction groove (2101); and a limit assembly connected to the blocking disc (23) is provided on the support rod (20); The opening and closing assembly comprises a discharge groove (301) formed on the circumferential outer wall of the processing tube (3), a symmetrically arranged cylinder (4) is fixed on the processing tube (3), a sealing ring (5) is fixed on the output end of the cylinder (4) and is connected to the processing tube (3) in a sliding and sealing manner, and the sealing ring (5) cooperates with the discharge groove (301).

2. The sludge drying treatment equipment based on negative pressure drainage and dehumidification according to claim 1 is characterized in that: The conducting and discharging mechanism further comprises a second water outlet groove (302) provided at the bottom of the processing tube (3), and a first water outlet groove (201) connected to the second water outlet groove (302) is provided on the partition plate (2).

3. The sludge drying treatment equipment based on negative pressure drainage and dehumidification according to claim 2 is characterized in that: The limiting assembly comprises a spring (24) sleeved on the support rod (20) and abutting against the blocking disk (23); a groove (2001) is provided on the support rod (20); and a protruding column slidably engaged with the groove (2001) is fixed on the blocking disk (23).

4. The sludge drying treatment equipment based on negative pressure drainage and dehumidification according to claim 1 is characterized in that: The pushing mechanism comprises a guide groove formed on the rotating rod (7); a connecting plate (14) is slidably mounted on the guide column (8); a movable sleeve (15) slidably connected to the rotating rod (7) is fixed on the connecting plate (14); a second limit block (16) slidably engaged with the guide groove is fixed on the inner wall of the movable sleeve (15); and a driven component connected to the rotating rod (7) is arranged on the movable sleeve (15).

5. The sludge drying treatment equipment based on negative pressure drainage and dehumidification according to claim 4 is characterized in that: The driven assembly comprises a limit groove formed on the outer wall of the rotating rod (7); a rotating sleeve (17) sleeved on the rotating rod (7) is rotatably mounted on the movable sleeve (15); a limit rod slidably connected to the limit groove is fixed to the inner wall of the rotating sleeve (17); and a connecting rod (18) hinged to the push plate (19) is hinged on the outer wall of the rotating sleeve (17).

6. A sludge drying treatment method based on negative pressure drainage and dehumidification, using the sludge drying treatment equipment based on negative pressure drainage and dehumidification as described in any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: The sludge to be treated is transported into the treatment tank (1) through the feed pipe (101), and the sludge is caused to fall onto the screen plate (6) under the action of the bidirectional guiding mechanism; Step 2: The bidirectional guiding mechanism also drives the conduction and discharge mechanism to move, ensuring that the bidirectional guiding mechanism can provide downward pressure and suction to the sludge on the screen plate (6), so that water in the sludge is discharged through the screening slot (601); Step 3: After the sludge treatment is completed, the processing tube (3) is opened under the action of the opening and closing assembly. At this time, the bidirectional guiding mechanism will drive the push plate (19) to move through the pushing mechanism to push the sludge accumulated on the screen plate (6) into the processing tank (1); Step 4: At the same time, the bidirectional guiding mechanism also controls the movement of the conducting discharge mechanism so that the separated water is discharged into the processing tank (1) through the processing pipe (3).

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