CN115108701A - Testing method and system for improving sludge dewatering performance by combining strong oxidant and flocculating agent - Google Patents
Testing method and system for improving sludge dewatering performance by combining strong oxidant and flocculating agent Download PDFInfo
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- CN115108701A CN115108701A CN202211026729.7A CN202211026729A CN115108701A CN 115108701 A CN115108701 A CN 115108701A CN 202211026729 A CN202211026729 A CN 202211026729A CN 115108701 A CN115108701 A CN 115108701A
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- box body
- dewatering
- scraper
- sludge
- dewatering box
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/087—Cleaning containers, e.g. tanks by methods involving the use of tools, e.g. brushes, scrapers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
- G01N2001/386—Other diluting or mixing processes
Abstract
The invention relates to a test method and a test system for improving sludge dewatering property by combining a strong oxidant and a flocculating agent, wherein the test method comprises a stirring device, a transfer device, a dewatering device and a weighing device; wherein, dewatering device includes: the mounting frame is fixedly provided with a liquid collecting box body, and a dewatering box body is rotatably arranged in the liquid collecting box body; the side turning mechanism is arranged in the dewatering box body and used for turning over sludge attached to the inner wall of the dewatering box body when the dewatering box body rotates, and comprises a centrifugal assembly and a scraper structure, wherein the centrifugal assembly is used for driving the scraper structure to move towards the inside of the dewatering box body; the power assembly is connected with the dewatering box body and the side-turning mechanism and is used for driving the dewatering box body and the side-turning mechanism to rotate reversely; the pressurizing assembly is arranged on the mounting frame and is matched with the dewatering box body, the pressurizing assembly can change the pressure intensity inside the dewatering box body when the dewatering box body works, sludge on the inner wall of the dewatering box body is turned, and dewatering efficiency is improved.
Description
Technical Field
The invention relates to the field of sludge dehydration performance testing, in particular to a testing method and a testing system for improving sludge dehydration performance by combining a strong oxidant and a flocculating agent.
Background
Sludge dewatering is an indispensable link in sludge treatment and recycling processes, but due to the fact that sludge has high water content and the strong binding force of water and solid colloidal particles in sludge, poor dewatering performance becomes a key factor for limiting sludge reduction and recycling treatment.
Most of the existing sludge dewatering equipment adopts a mode of combining a strong oxidant and a flocculating agent, and the dewatering equipment is combined to dewater sludge, and in order to determine the proportion of the strong oxidant and the flocculating agent, a certain test needs to be carried out to determine the proportion of the strong oxidant and the flocculating agent, wherein the dewatering capacity provided by the dewatering equipment for sludge is the key of the test speed, the traditional dewatering equipment is as large as adopting a centrifugal mode to assist sludge to dewater, in the specific dewatering process, the sludge is accumulated on the inner wall of the dewatering equipment, the sludge close to the inner wall of the dewatering equipment completes dewatering in one step, when the sludge far away from the inner wall of the dewatering equipment separates out moisture, the moisture needs to flow through the sludge close to the inner wall of the dewatering equipment, so that the sludge close to the inner wall of the dewatering equipment is wetted again, and the integral dewatering speed of the sludge is slower, affecting the speed of the test.
Disclosure of Invention
The invention aims to provide a method and a system for testing the sludge dewatering property by combining a strong oxidant and a flocculating agent so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a test method for improving sludge dewatering performance by combining a strong oxidant and a flocculating agent comprises the following steps:
the method comprises the following steps: adding a specified amount of sludge to be tested into a stirring device, and simultaneously adding strong oxidants and flocculating agents with different qualities into the sludge, which are marked as A 1 、A 2 、A 3 ···A n And B 1 、B 2 、B 3 ···B n Stirring and mixing the mixture inside the mixer by using a stirring device to obtain an intermediate mixture;
step two: pouring the intermediate mixture into a dewatering device by using a transfer device, and weighing the intermediate mixture and the total mass of the dewatering device by using a weighing device, wherein the total mass is marked as C 1 、C 2 、C 3 ···C n ；
Step three: controlling the operation of a dehydration device, dehydrating the intermediate mixture, obtaining a final mixture after dehydration, and weighing the final mixture and the total mass of the dehydration device by using a weighing device again, wherein the total mass is recorded as D1, D2 and D3 & cne;
step four: is obtained by calculation
Under the maximum condition
The numerical value of (1) is marked as K;
step five: get
Repeating the first step and the second step for the strong oxidant and the flocculating agent with the mass under the K value and the sludge with the same specified amount to be tested, and changing the pressure value in the dewatering device when controlling the dewatering device to work, and marking as P 1 、P 2 、P 3 ···P n ；
Step six: is calculated at
Maximum case P n And the test is completed.
As a further scheme of the invention: the process is carried out at a constant ambient temperature.
A system for improving the sludge dewatering performance by combining a strong oxidant and a flocculating agent is used for realizing a test method for improving the sludge dewatering performance by combining the strong oxidant and the flocculating agent, and comprises a stirring device, a transfer device, a dewatering device and a weighing device;
wherein, the dewatering device includes:
the device comprises a mounting rack, a liquid collecting box body is fixed on the mounting rack, and a dewatering box body is rotatably arranged in the liquid collecting box body;
the side turning mechanism is arranged in the dehydration box body and used for turning over sludge attached to the inner wall of the dehydration box body when the dehydration box body rotates, and comprises a centrifugal assembly and a scraper structure, wherein the centrifugal assembly is used for driving the scraper structure to move towards the inside of the dehydration box body;
the power assembly is connected with the dewatering box body and the side-turning mechanism and is used for driving the dewatering box body and the side-turning mechanism to rotate reversely;
the pressurizing assembly is arranged on the mounting frame and is matched with the dewatering box body, and the pressurizing assembly can change the pressure intensity inside the dewatering box body when the dewatering box body works.
As a still further scheme of the invention: the centrifugal assembly comprises a connecting shaft which is rotatably installed on the installation frame, the connecting shaft penetrates through a rotating shaft of the dewatering box body and is connected with a rotating piece, the upper end part of the rotating piece is connected with the scraper structure, two third sliding grooves are symmetrically formed in the lower end part of the rotating piece, a third sliding block is arranged in each third sliding groove in a sliding mode, the third sliding block is connected with a second sliding block which slides on the rotating piece through a pushing rod, the second sliding block is connected with the scraper structure, and the second sliding block is connected with the rotating piece through an energy storage structure;
one end of the pushing rod is rotatably connected with the third sliding block, and the other end of the pushing rod is rotatably connected with the second sliding block.
As a still further scheme of the invention: the energy storage structure is including setting up No. two spouts on the rotating member, install in No. two spouts along its length direction set up and with No. two slider sliding connection's pole setting, the cover is equipped with the cylindricality spring in the pole setting, the one end of cylindricality spring with the diapire of No. two spouts is connected, the other end with No. two sliders are connected.
As a still further scheme of the invention: the scraper blade structure include with rotating member upper end fixed connection's scraper blade No. one, the inside of scraper blade is hollow structure, and slide the cover in the scraper blade and be equipped with the scraper blade No. two, the inside of No. two scraper blades also is hollow structure, and the inside slip cover of No. two scraper blades is equipped with No. three scraper blades, No. three scraper blades with install connecting rod fixed connection on No. two sliders.
As a still further scheme of the invention: one end of the first scraping plate, one end of the second scraping plate and one end of the third scraping plate are in sliding fit with the inner wall of the dewatering box body, and vertical groove bodies for the connecting rods to move are formed in the first scraping plate and the second scraping plate;
a spacing groove has been seted up to the other end of a scraper blade and No. two scraper blades, No. two scraper blades with the lateral wall upper end of No. three scraper blades be provided with the stopper of spacing groove adaptation.
As a still further scheme of the invention: the power assembly comprises a driving device fixed on the mounting frame, an output shaft of the driving device is connected with a rotating shaft of the dewatering box body through a toothed belt, and the output shaft of the driving device is connected with the connecting shaft through a gear set.
As a still further scheme of the invention: the pressurizing assembly comprises a chute arranged on the mounting frame, a sliding block is arranged in the chute, the sliding block is connected with a cylinder on the mounting frame, and the sliding block is connected with a pressurizing sealing plate matched with the dewatering box body.
As a still further scheme of the invention: the upper portion of dewatering box body open end is circumference equidistance and is provided with a plurality of guide slots, the guide slot is in with the setting a plurality of protruding adaptations of pressurized closure board lateral part.
Compared with the prior art, the invention has the beneficial effects that:
when the dewatering box is used, the dewatering box body and the scraper plate structure move oppositely, and simultaneously, in an initial state, the scraper plate structure and sludge in the dewatering box body are in a separated state, so that the instant load of a power assembly during starting is reduced, and simultaneously, when the centrifugal force applied to the sludge by the dewatering box body is larger than the gravity, the sludge overcomes the gravity and is attached to the inner wall of the dewatering box body under the action of the centrifugal force, and at the moment, the scraper plate structure slowly descends to be in contact with the sludge, and the sludge is turned over on the inner wall of the dewatering box body, so that the position of the sludge tightly attached to the side wall of the dewatering box body is changed, the sludge is prevented from being accumulated on the side wall of the dewatering box body, the dewatering speed of the sludge positioned on the inner side is low, namely, the sludge far away from the inner wall of the dewatering box body needs to enable water to flow through the sludge close to the inner wall of the dewatering box body during dewatering, and the sludge close to the inner wall of the dewatering box body is wetted again, to increase the rate of water deposition.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a system for improving sludge dewatering by using a strong oxidant and a flocculating agent.
FIG. 2 is a schematic diagram of another embodiment of a system for improving sludge dewatering using a strong oxidizing agent in combination with a flocculating agent.
FIG. 3 is a schematic diagram of a liquid collection tank and a dewatering tank in an embodiment of a system for improving sludge dewatering by combining a strong oxidant and a flocculating agent.
FIG. 4 is a schematic diagram of the internal structure of a dewatering tank in an embodiment of a system for improving sludge dewatering by using a strong oxidant and a flocculating agent.
FIG. 5 is a schematic structural diagram of a side-turning mechanism in an embodiment of a system for improving sludge dewatering by using a strong oxidant and a flocculating agent.
FIG. 6 is a schematic diagram of a centrifuge module in an embodiment of a system for improving sludge dewatering using a strong oxidizing agent in combination with a flocculating agent.
FIG. 7 is a schematic diagram of a scraper blade in an embodiment of a system for improving sludge dewatering by using a strong oxidant and a flocculating agent.
FIG. 8 is a schematic diagram of the structure of a scraper blade in an embodiment of a system for improving sludge dewatering by using a strong oxidant in combination with a flocculating agent.
In the figure: 1. a base; 2. mounting a plate; 3. a liquid collection tank; 4. a dewatering box body; 5. a cylinder; 6. a first chute; 7. a first sliding block; 8. a pressure sealing plate; 9. a protrusion; 10. a guide groove; 11. a drive device; 12. a first gear; 13. a second gear; 14. a toothed belt; 15. a connecting shaft; 16. a rotating member; 17. a first scraper; 18. a second scraper; 19. a third scraper; 20. a limiting groove; 21. a limiting block; 22. a second chute; 23. a second sliding block; 24. erecting a rod; 25. a cylindrical spring; 26. a push rod; 27. a third sliding block; 28. a third sliding chute; 29. and a balancing weight.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Referring to fig. 1 to 8, in an embodiment of the present invention, a method for testing sludge dewatering performance by using a strong oxidant and a flocculating agent together includes the following steps:
the method comprises the following steps: adding a specified amount of sludge to be tested into a stirring device, and simultaneously adding strong oxidants and flocculating agents with different qualities into the sludge, which are marked as A 1 、A 2 、A 3 ···A n And B 1 、B 2 、B 3 ···B n Stirring and mixing the mixture inside the mixer by using a stirring device to obtain an intermediate mixture;
step two: pouring the intermediate mixture into a dewatering device by using a transfer device, and weighing the intermediate mixture and the total mass of the dewatering device by using a weighing device, wherein the total mass is marked as C 1 、C 2 、C 3 ···C n ；
Step three: controlling the operation of the dehydration device, dehydrating the intermediate mixture, obtaining a final mixture after dehydration, weighing the final mixture and the total mass of the dehydration device by using the weighing device again, and recording the weight D 1 、D 2 、D 3 ···D n ；
Step four: is obtained by calculation at
Under the maximum condition
The numerical value of (c) is marked as K;
step five: get
Repeating the first step and the second step for the strong oxidant and the flocculating agent with the mass under the K value and the sludge with the same specified amount to be tested, and changing the pressure value in the dewatering device when controlling the dewatering device to work, and marking as P 1 、P 2 、P 3 ···P n ；
Step six: is calculated at
Maximum case P n And the test is completed.
The test method needs to be carried out at a constant ambient temperature so as to reduce the influence of the ambient temperature on the test result.
By adopting the method for controlling the variable, the factors influencing the sludge dewatering performance are tested, the influence of uncertain variables on the detection result is avoided, the accuracy of the detection result is ensured, and meanwhile, the time for publishing the detection result is faster due to the adoption of the method for controlling the variable.
Wherein, through the quality change before and after the contrast sludge dewatering, can be more audio-visual judgement strong oxidant and flocculation medicament and pressure to the influence of sludge dewatering nature.
Referring to fig. 1 to 8, as an embodiment of the present invention, a system for improving sludge dewatering performance by using a combination of a strong oxidant and a flocculating agent is further provided, for implementing the testing method, where the system includes the stirring device, the transferring device, the dewatering device, and the weighing device;
wherein, the dewatering device includes: the device comprises a mounting frame, a side-turning mechanism, a power component and a pressurizing component.
The mounting frame comprises a base 1 and a mounting plate 2 detachably connected with the base 1, a liquid collecting box body 3 is further fixed on the base 1, a dewatering box body 4 is rotatably mounted in the liquid collecting box body 3, the central axis of the liquid collecting box body 3 is collinear with the central axis of the dewatering box body 4, and for an example, the base 1 and the mounting plate 2 are connected through bolts or buckles, so that the mounting frame is more simple and convenient to detach;
the side-turning mechanism is installed in the dewatering box body 4 and is used for turning over sludge attached to the inner wall of the dewatering box body 4 when the dewatering box body 4 rotates, the side-turning mechanism comprises a centrifugal component and a scraper structure, the centrifugal component is used for driving the scraper structure to move towards the inside of the dewatering box body 4, the centrifugal component comprises a connecting shaft 15, the connecting shaft 15 is rotatably installed on the liquid collecting box body 3 and penetrates through a rotating shaft of the dewatering box body 4 and the liquid collecting box body 3 to connect a rotating part 16 arranged in the dewatering box body 4, the upper end part of the rotating part 16 is connected with the scraper structure, two third sliding blocks 27 are symmetrically arranged at the lower end part of the rotating part 16, the third sliding blocks 27 slide in third sliding grooves 28 on the rotating part 16, the third sliding block 27 is connected with the second sliding block 23 sliding on the rotating part 16 through a pushing rod 26, one end of the pushing rod 26 is rotatably connected with the third sliding block 27, the other end of the pushing rod 26 is rotatably connected with the second sliding block 23, and a balancing weight 29 is further mounted on the lower portion of the third sliding block 27;
the second sliding block 23 is further connected with the scraper structure, and the second sliding block 23 is connected with the rotating part 16 through an energy storage structure;
energy storage structure includes and sets up along the vertical direction in space No. two spout 22 on the rotating member 16, install the pole setting 24 that sets up along its length direction in No. two spout 22, pole setting 24 with No. two slider 23 sliding connection, just the cover is equipped with cylindrical spring 25 on the pole setting 24, cylindrical spring 25's one end with No. two spout 22's diapire is connected, the other end with No. two slider 23 are connected.
When the sludge dewatering box is used, sludge added with strong oxidant and flocculating agent and uniformly stirred is poured into the dewatering box body 4, when the output shaft of the driving device 11 drives the dewatering box body 4 to rotate through the toothed belt 14, when the driving device 11 is just started, the sludge is accumulated at the bottom of the dewatering box body 4 under the action of gravity, the rotating speed of the rear driving device 11 is increased, so that the dewatering box body 4 generates centrifugal force, the sludge at the bottom of the dewatering box body 4 is gradually pushed to the circumferential side wall of the dewatering box body under the action of the centrifugal force, and when the sludge has the centrifugal force greater than the gravity of the sludge, the sludge overcomes the gravity of the sludge and adheres to the inner side wall of the dewatering box body 4, the water in the sludge is separated out by the centrifugal force, and the dewatering speed of the sludge is increased.
Wherein, in the process that the sludge moves from the bottom of the dewatering box body 4 to the side wall of the dewatering box body 4, the third slide block 27 and the counterweight 29 are just submerged in the sludge, at this time, when the sludge moves towards the side wall of the dewatering box body 4, the third slide block 27 can not overcome the centrifugal force to keep different under the action of the resistance provided by the cylindrical spring 25 and the sludge, and along with the increase of the rotating speed of the driving device 11, when the sludge is completely attached to the inner wall of the dewatering box body 4, on one hand, the centrifugal force is increased due to the increase of the rotating speed, on the other hand, the inner bottom of the dewatering box body 4 has no sludge, at this time, the centrifugal force generated by the third slide block 27 and the counterweight 29 is larger than the elastic force provided by the cylindrical spring 25, at this time, the third slide block 27 moves away from the rotating center of the rotating piece 16, and drives the second slide block 23 to move downwards through the pushing rod 26, and compresses the cylindrical spring 25, the scraper structure is driven to extend towards the bottom in the dewatering box body 4, and the scraper structure is connected with the inner wall of the dewatering box body 4 in a sliding manner, so that when the scraper structure touches the sludge on the inner wall of the dewatering box body 4, the sludge can be turned over on the side wall of the dewatering box body 4 under the action of the scraper structure, the sludge tightly attached to the side wall of the dewatering box body 4 is changed in position, the sludge is prevented from being accumulated on the side wall of the dewatering box body 4, and the sludge located on the inner side is slow in dewatering speed.
It should be noted that the scraper structure is a hook-shaped structure, and since the scraper structure moves in a reverse direction with respect to the dewatering box body 4 during the rotation of the dewatering box body 4, the sludge is not accumulated at the turning point of the scraper structure, and the turning point of the scraper structure is smoothly transited.
Wherein, all be provided with a plurality of semi-permeable membrane holes on the circumference lateral wall of the dehydration box body 4 and the diapire for make the water analysis in the mud go out the back, flow into in the liquid collection box body 3.
Referring to fig. 5, 7 and 8, the scraper structure includes a first scraper 17 fixedly connected to the upper end of the rotating member 16, the first scraper 17 is hollow, a second scraper 18 is slidably sleeved in the first scraper 17, the second scraper 18 is also hollow, a third scraper 19 is slidably sleeved in the second scraper 18, the third scraper 19 is connected to the second slider 23 through a connecting rod, wherein one end of each of the first scraper 17, the second scraper 18 and the third scraper 19 is slidably fitted to the inner wall of the dehydration tank 4, and vertical grooves for the movement of the connecting rod are formed in the first scraper 17 and the second scraper 18;
the other ends of the first scraper 17 and the second scraper 18 are provided with limiting grooves 20, and the upper ends of the side walls of the second scraper 18 and the third scraper 19 are provided with limiting blocks 21 matched with the limiting grooves 20.
In the initial state, under the action of the cylindrical spring 25, the second slide block 23 is positioned at the uppermost part of the second slide groove 22, at this time, the third scraper 19 is positioned inside the second scraper 18, the second scraper 18 is positioned inside the first scraper 17, namely, the three are positioned at the upper part of the rotating part 16 and are in a separated state with the sludge in the dewatering box body 4, and along with the rotation of the dewatering box body 4, the sludge moves towards the circumferential inner wall of the dewatering box body 4, at this time, the second slide block 23 is driven to move downwards under the action of the third slide block 27 and the counterweight 29, and the third scraper 19 moves downwards along with the second slide block 23, at this time, the second scraper 18 is in a state of abutting against the third scraper 19 under the action of gravity and slides relative to the first scraper 17, and along with the descending of the third scraper 19, the limiting block 21 on the second scraper 18 moves to the end part of the limiting groove 20 on the first scraper 17, when the limiting block 21 on the second scraper 18 abuts against the end part of the limiting groove 20 on the first scraper 17, the second scraper 18 and the first scraper 17 are kept relatively static, meanwhile, the third scraper 19 can continuously descend and slides relative to the second scraper 18, the limiting block 21 on the third scraper 19 moves to the end part of the limiting groove 20 on the second scraper 18, at the moment, the third scraper 19 stops descending, and the total length of the first scraper 17, the second scraper 18 and the third scraper 19 in the state is equal to the length of sludge attached to the dewatering box body 4, so that the sludge on the inner wall of the dewatering box body 4 can be turned.
Through the arrangement, on one hand, the phenomenon that the sludge is attached to the inner wall of the dewatering box body 4 and is still avoided, so that the sludge far away from the inner wall of the dewatering box body 4 needs to enable water to flow through the sludge close to the inner wall of the dewatering box body 4 when dewatering, and the sludge close to the inner wall of the dewatering box body 4 is wetted again, so that the precipitation speed of the water is slow, on the other hand, at the moment that the driving device 11 is started, the sludge is separated from the first scraper 17, the second scraper 18 and the third scraper 19, at the moment, the output load of the driving device 11 is smaller, and along with the descending of the third scraper 19, the rotating speed of the driving device 11 is very fast, so that the inertia is large, when the third scraper 19 is in contact with the sludge, the influence on the load of the driving device 11 is not very large, and simultaneously, the third scraper 19 is in the process of continuous descending, so that the load of the driving device 11 gradually ascends, effectively avoids the instant increase of the load and the burning of the motor.
Referring to fig. 2 and 4, the power assembly is disposed between the base 1 and the liquid collection box 3 and is connected to the dewatering box 4 and the connecting shaft 15, the power assembly is configured to drive the dewatering box 4 and the connecting shaft 15 to rotate in opposite directions, the power assembly includes a driving device 11 fixed on the base 1, an output shaft of the driving device 11 is connected to a rotating shaft of the dewatering box 4 through a toothed belt 14, and an output shaft of the driving device 11 is connected to the connecting shaft 15 through a gear set.
The gear set comprises a second gear 13 coaxially connected with the connecting shaft 15 and a first gear 12 meshed with the second gear 13 and coaxially connected with an output shaft of the driving device 11.
When the dewatering box is used, the driving device 11 is controlled to work, the output shaft of the driving device 11 drives the dewatering box 4 to rotate through the toothed belt 14, meanwhile, the output shaft of the driving device 11 drives the first gear 12 to rotate, the first gear 12 is meshed with the second gear 13, so that the driving device 11 drives the dewatering box 4 and the connecting shaft 15 to rotate simultaneously, the circumferential radius of the first gear 12 is smaller than that of the second gear 13, the circumferential radius of the driving belt wheel of the toothed belt 14 is smaller than that of the driven belt wheel (the driving belt wheel of the toothed belt 14 is coaxially connected with the output shaft of the driving device 11, and the driven belt wheel is coaxially connected with the rotating shaft of the dewatering box 4), namely, the rotation ratio of the first gear 12 to the second gear 13 and the transmission ratio of the toothed belt 14 are both smaller than 1, so that the starting load of the driving device 11 is smaller due to the reduction of required torque in the process of starting the driving device 11, avoid leading to drive arrangement 11 to burn out because the load is too big, simultaneously under the effect of a gear 12 and No. two gears 13, the rotation direction of connecting axle 15 and dewatering box body 4 is reverse, and then improves the relative rotational speed between the two, when avoiding scraping the mud on dewatering box body 4 inner wall and making the mud upset at a scraper blade 17, No. two scraper blades 18 and No. three scraper blades 19, because the speed is low excessively and fall the bottom of dewatering box body 4, has improved the efficiency of dehydration promptly.
Referring to fig. 1 and 4, the pressurizing assembly is disposed on the mounting plate 2 and adapted to the dewatering box 4, and can change the internal pressure of the dewatering box 4 when the dewatering box is in operation, the pressurizing assembly includes a first chute 6 disposed on the mounting frame, a first slider 7 is slidably mounted in the first chute 6, the first slider 7 is connected to the cylinder 5 mounted on the mounting frame, and the first slider 7 is connected to a pressurizing closing plate 8 adapted to the dewatering box 4;
the upper portion of 4 open ends of dehydration box is the circumference equidistance and is provided with a plurality of guide slots 10, guide slot 10 and setting are in a plurality of protruding 9 adaptations of 8 lateral parts of pressurized closure board.
To add strong oxidant and flocculation medicament and pour into the dewatering box body 4 back by mud after the even stirring, through the flexible end action of control cylinder 5, can drive pressurization shrouding 8 towards the motion of dewatering box body 4, and the external diameter of pressurization shrouding 8 is the same with the internal diameter of dewatering box body 4, when pressurization shrouding 8 enters into dewatering box body 4, the junction of the two is in the sealing connection state, dewatering box body 4 has been avoided escaping by the junction of the two, simultaneously pressurization shrouding 8 is when entering into dewatering box body 4, rotate with dewatering box body 4 synchronous emergence, so pressurization shrouding 8 rotates and installs on slider 7, simultaneously along with pressurization shrouding 8 enters into dewatering box body 4 the distance big more, pressure in the dewatering box body 4 will be big more.
Because the pressure shrouding 8 rotates and installs No. 7 on, and need pressure shrouding 8 to follow dehydration tank 4 and rotate, so set up guide slot 10 and arch 9, and in order to prevent that pressure shrouding 8 from taking place to rotate when adding mud in the dehydration tank 4, make guide slot 10 and arch 9 dislocation, and set up guide slot 10 as the upper end opening great, the lower extreme opening is less and can with protruding 9 sliding seal's form, so that when guide slot 10 and arch 9 misplace, when pressure shrouding 8 moves towards dehydration tank 4, can be under the guide effect of guide slot 10, make protruding 9 automatic to the lower extreme of contrarotating guide slot 10, certain fool-proof effect has promptly.
In conclusion, when the driving device 11 is controlled to work, the output shaft of the driving device 11 drives the dewatering box 4 to rotate through the toothed belt 14, the output shaft of the driving device 11 drives the first gear 12 to rotate, the first gear 12 is meshed with the second gear 13, so that the driving device 11 drives the dewatering box 4 and the connecting shaft 15 to rotate simultaneously, and since the circumferential radius of the first gear 12 is smaller than that of the second gear 13, the circumferential radius of the driving pulley of the toothed belt 14 is smaller than that of the driven pulley (the driving pulley of the toothed belt 14 is coaxially connected with the output shaft of the driving device 11, and the driven pulley is coaxially connected with the rotating shaft of the dewatering box 4), that is, the rotation ratio of the first gear 12 to the second gear 13 and the transmission ratio of the toothed belt 14 are both smaller than 1, so that in the process of starting the driving device 11, the required torque is reduced, so that the starting load of the driving device 11 is smaller, avoid leading to drive arrangement 11 to burn out because the load is too big, simultaneously under the effect of a gear 12 and No. two gears 13, the rotation direction of connecting axle 15 and dewatering box body 4 is reverse, and then improves the relative rotational speed between the two, when avoiding scraping the mud on dewatering box body 4 inner wall and making the mud upset at a scraper blade 17, No. two scraper blades 18 and No. three scraper blades 19, because the speed is low excessively and fall the bottom of dewatering box body 4, has improved the efficiency of dehydration promptly.
When the sludge dewatering box is used, sludge added with strong oxidant and flocculating agent and uniformly stirred is poured into the dewatering box body 4, when the output shaft of the driving device 11 drives the dewatering box body 4 to rotate through the toothed belt 14, when the driving device 11 is just started, the sludge is accumulated at the bottom of the dewatering box body 4 under the action of gravity, the rotating speed of the rear driving device 11 is increased, so that the dewatering box body 4 generates centrifugal force, the sludge at the bottom of the dewatering box body 4 is gradually pushed to the circumferential side wall of the dewatering box body under the action of the centrifugal force, and when the sludge has the centrifugal force greater than the gravity of the sludge, the sludge overcomes the gravity of the sludge and adheres to the inner side wall of the dewatering box body 4, the water in the sludge is separated out by the centrifugal force, and the dewatering speed of the sludge is increased.
Wherein, in the process that the sludge moves from the bottom of the dewatering box body 4 to the side wall of the dewatering box body 4, the third slide block 27 and the counterweight 29 are just submerged in the sludge, at this time, when the sludge moves towards the side wall of the dewatering box body 4, the third slide block 27 can not overcome the centrifugal force to keep different under the action of the resistance provided by the cylindrical spring 25 and the sludge, and along with the increase of the rotating speed of the driving device 11, when the sludge is completely attached to the inner wall of the dewatering box body 4, on one hand, the centrifugal force is increased due to the increase of the rotating speed, on the other hand, the inner bottom of the dewatering box body 4 has no sludge, at this time, the centrifugal force generated by the third slide block 27 and the counterweight 29 is larger than the elastic force provided by the cylindrical spring 25, at this time, the third slide block 27 moves away from the rotating center of the rotating piece 16, and drives the second slide block 23 to move downwards through the pushing rod 26, and compresses the cylindrical spring 25, the scraper structure is driven to extend towards the bottom in the dewatering box body 4, and the scraper structure is connected with the inner wall of the dewatering box body 4 in a sliding manner, so that when the scraper structure touches the sludge on the inner wall of the dewatering box body 4, the sludge can be turned over on the side wall of the dewatering box body 4 under the action of the scraper structure, the sludge tightly attached to the side wall of the dewatering box body 4 is changed in position, the sludge is prevented from being accumulated on the side wall of the dewatering box body 4, and the sludge located on the inner side is slow in dewatering speed.
In an initial state, under the action of a cylindrical spring 25, a second slide block 23 is positioned at the uppermost part of a second sliding groove 22, a third scraper 19 is positioned inside the second scraper 18, the second scraper 18 is positioned inside a first scraper 17, namely, the third slide block, the second scraper and the first scraper are positioned on the upper part of a rotating part 16 and are in a separated state with sludge in a dewatering box body 4, the sludge moves towards the circumferential inner wall of the dewatering box body 4 along with the rotation of the dewatering box body 4, at the moment, the second slide block 23 is driven to move downwards under the action of a third slide block 27 and a balancing weight 29, the third scraper 19 moves downwards along with the second slide block 23, at the moment, the second scraper 18 is in a butted state with the third scraper 19 under the action of gravity and slides relative to the first scraper 17, and a limiting block 21 on the second scraper 18 moves to the end part of a limiting groove 20 on the first scraper 17 along with the descending of the third scraper 19, when the limiting block 21 on the second scraper 18 abuts against the end part of the limiting groove 20 on the first scraper 17, the second scraper 18 and the first scraper 17 are kept relatively static, meanwhile, the third scraper 19 can continuously descend and slides relative to the second scraper 18, the limiting block 21 on the third scraper 19 moves to the end part of the limiting groove 20 on the second scraper 18, at the moment, the third scraper 19 stops descending, and the total length of the first scraper 17, the second scraper 18 and the third scraper 19 in the state is equal to the length of sludge attached to the dewatering box body 4, so that the sludge on the inner wall of the dewatering box body 4 can be turned.
To add strong oxidant and flocculation medicament and pour into the dewatering box body 4 back by mud after the even stirring, through the flexible end action of control cylinder 5, can drive pressurization shrouding 8 towards the motion of dewatering box body 4, and the external diameter of pressurization shrouding 8 is the same with the internal diameter of dewatering box body 4, when pressurization shrouding 8 enters into dewatering box body 4, the junction of the two is in the sealing connection state, dewatering box body 4 has been avoided escaping by the junction of the two, simultaneously pressurization shrouding 8 is when entering into dewatering box body 4, rotate with dewatering box body 4 synchronous emergence, so pressurization shrouding 8 rotates and installs on slider 7, simultaneously along with pressurization shrouding 8 enters into dewatering box body 4 the distance big more, pressure in the dewatering box body 4 will be big more.
Because the pressurization shrouding 8 rotates and installs No. 7 on the slider, and need pressurization shrouding 8 to rotate along with dehydration box 4, so set up guide slot 10 and arch 9, and in order to prevent that pressurization shrouding 8 from taking place to rotate when adding mud in the dehydration box 4, make guide slot 10 and arch 9 dislocation, and set up guide slot 10 as the upper end opening great, the lower extreme opening is less and can with the form of arch 9 sliding seal, so that when guide slot 10 and arch 9 misplace, when pressurization shrouding 8 moves towards dehydration box 4, can make the automatic lower extreme of contra-rotating guide slot 10 of arch 9 under the guide effect of guide slot 10, certain foolproof effect has promptly.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A test method for improving sludge dewatering performance by combining a strong oxidant and a flocculating agent is characterized by comprising the following steps:
the method comprises the following steps: adding a specified amount of sludge to be tested into a stirring device, and simultaneously adding strong oxidants and flocculating agents with different qualities into the sludge, which are marked as A 1 、A 2 、A 3 ···A n And B 1 、B 2 、B 3 ···B n And mixing the inside thereof by a stirring deviceStirring and mixing the mixture to obtain an intermediate mixture;
step two: pouring the intermediate mixture into a dewatering device by using a transfer device, and weighing the intermediate mixture and the total mass of the dewatering device by using a weighing device, wherein the total mass is marked as C 1 、C 2 、C 3 ···C n ；
Step three: controlling the operation of the dehydration device, dehydrating the intermediate mixture, obtaining a final mixture after dehydration, weighing the final mixture and the total mass of the dehydration device by using the weighing device again, and recording the weight D 1 、D 2 、D 3 ···D n ；
Step four: is obtained by calculation
Under the maximum condition
The numerical value of (1) is marked as K;
step five: get
Repeating the first step and the second step for the strong oxidant and the flocculating agent with the mass under the K value and the sludge with the same specified amount to be tested, and changing the pressure value in the dewatering device when controlling the dewatering device to work, and marking as P 1 、P 2 、P 3 ···P n ；
Step six: is calculated at
Maximum case P n And the test is completed.
2. A test method for improving sludge dewatering by combining a strong oxidant with a flocculating agent according to claim 1, characterised in that the method is performed at constant ambient temperature.
3. A system for improving sludge dewatering by combining a strong oxidant and a flocculating agent, wherein the system is used for realizing the test method of claim 1 and comprises the stirring device, a transfer device, a dewatering device and a weighing device;
wherein, the dewatering device includes:
the device comprises a mounting rack, a liquid collecting box body (3) is fixed on the mounting rack, and a dewatering box body (4) is rotatably installed in the liquid collecting box body (3);
the side turning mechanism is arranged in the dehydration box body (4) and used for turning over sludge attached to the inner wall of the dehydration box body (4) when the dehydration box body (4) rotates, and comprises a centrifugal assembly and a scraper structure, wherein the centrifugal assembly is used for driving the scraper structure to move towards the inside of the dehydration box body (4);
the power assembly is connected with the dewatering box body (4) and the side-turning mechanism and is used for driving the dewatering box body (4) and the side-turning mechanism to rotate reversely;
and the pressurizing assembly is arranged on the mounting frame and is matched with the dewatering box body (4), and the pressurizing assembly can change the pressure intensity inside the dewatering box body (4) when the dewatering box body works.
4. The system for improving sludge dewatering by using a strong oxidant and a flocculating agent in combination according to claim 3, characterized in that the centrifugal assembly comprises a connecting shaft (15) rotatably mounted on the mounting frame, the connecting shaft (15) penetrates through the rotating shaft of the dewatering box body (4) and is connected with a rotating piece (16), the upper end part of the rotating part (16) is connected with the scraper structure, the lower end part of the rotating part (16) is symmetrically provided with two third sliding grooves (28), each third sliding groove (28) is internally provided with a third sliding block (27) in a sliding manner, the third sliding block (27) is connected with the second sliding block (23) which slides on the rotating piece (16) through a pushing rod (26), the second sliding block (23) is connected with the scraper structure, the second sliding block (23) is connected with the rotating piece (16) through an energy storage structure;
one end of the pushing rod (26) is rotatably connected with the third sliding block (27), and the other end of the pushing rod is rotatably connected with the second sliding block (23).
5. The system for improving the sludge dewatering performance by using the combination of the strong oxidant and the flocculating agent as claimed in claim 4, wherein the energy storage structure comprises a second chute (22) arranged on the rotating member (16), a vertical rod (24) arranged along the length direction of the second chute (22) and slidably connected with the second sliding block (23) is installed in the second chute (22), a cylindrical spring (25) is sleeved on the vertical rod (24), one end of the cylindrical spring (25) is connected with the bottom wall of the second chute (22), and the other end of the cylindrical spring is connected with the second sliding block (23).
6. The system for improving the sludge dewatering performance by combining the strong oxidant and the flocculating agent is characterized in that the scraper structure comprises a first scraper (17) fixedly connected with the upper end of the rotating part (16), the inside of the first scraper (17) is of a hollow structure, a second scraper (18) is sleeved in the first scraper (17) in a sliding mode, the inside of the second scraper (18) is also of a hollow structure, a third scraper (19) is sleeved in the inside of the second scraper (18) in a sliding mode, and the third scraper (19) is fixedly connected with a connecting rod mounted on the second sliding block (23).
7. The system for improving the sludge dewatering performance by combining the strong oxidant and the flocculating agent according to claim 6, wherein one end of the first scraper (17), one end of the second scraper (18) and one end of the third scraper (19) are in sliding fit with the inner wall of the dewatering box body (4), and vertical grooves for the connecting rods to move are formed in the first scraper (17) and the second scraper (18);
a limiting groove (20) is formed in the other end of the first scraper (17) and the other end of the second scraper (18), and a limiting block (21) matched with the limiting groove (20) is arranged at the upper end of the side wall of the second scraper (18) and the side wall of the third scraper (19).
8. A system for improving sludge dewatering by using a strong oxidant and a flocculating agent together according to claim 4, wherein the power assembly comprises a driving device (11) fixed on the mounting frame, an output shaft of the driving device (11) is connected with a rotating shaft of the dewatering box body (4) through a toothed belt (14), and an output shaft of the driving device (11) is connected with the connecting shaft (15) through a gear set.
9. The system for improving the sludge dewatering performance by using the combination of the strong oxidant and the flocculating agent as claimed in claim 3, wherein the pressurizing assembly comprises a first sliding groove (6) arranged on the mounting frame, a first sliding block (7) is slidably mounted in the first sliding groove (6), the first sliding block (7) is connected with a cylinder (5) mounted on the mounting frame, and the first sliding block (7) is connected with a pressurizing sealing plate (8) matched with the dewatering box body (4).
10. A system for improving sludge dewatering with a combination of a strong oxidant and a flocculating agent according to claim 9, wherein the dewatering box (4) has a plurality of guide slots (10) arranged at equal intervals on the circumference of the upper part of the open end, and the guide slots (10) are adapted to a plurality of protrusions (9) arranged on the side of the pressure sealing plate (8).
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| CN103063817A (en) * | 2012-12-20 | 2013-04-24 | 华南理工大学 | System and method of measuring sludge dewatering performance |
| CN108483846A (en) * | 2018-03-21 | 2018-09-04 | 扬州同昌环保装备有限公司 | A kind of vertical sludge dewaterer |
| CN210506020U (en) * | 2019-09-04 | 2020-05-12 | 盘山县爱平土石方工程有限公司 | Quick sludge deep dehydration device |
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