CN111547988A

CN111547988A - Sludge treatment system

Info

Publication number: CN111547988A
Application number: CN202010408455.2A
Authority: CN
Inventors: 廖文利; 郭朝中; 刘代军; 刘瑶; 李忠彬; 冯桐; 何瑶; 袁江; 皮青全
Original assignee: Chongqing University of Arts and Sciences
Current assignee: Chongqing University of Arts and Sciences
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-08-18

Abstract

The invention relates to the technical field of sludge treatment, in particular to a sludge treatment system. The specific technical scheme is as follows: a sludge treatment system comprises a dewatering cylinder with an open top, wherein an annular support table is transversely fixed on the inner wall of the dewatering cylinder close to the open top of the dewatering cylinder, an inner gear ring with a C-shaped section is arranged on the annular support table, a sun gear is arranged at the center of the inner gear ring, a fixed shaft is fixed at the center of the top of the sun gear, a driven gear is fixed on the fixed shaft, and the driven gear is meshed with a driving gear on a motor; the two side surfaces of the sun wheel are transversely provided with annular supporting sheets extending out of the wheel teeth of the sun wheel, a plurality of planet wheels meshed with the inner gear ring and the sun wheel are arranged between the inner gear ring and the sun wheel respectively, and stirring shafts are eccentrically arranged on the bottom surfaces of the sun wheel and each planet wheel and face the bottom of the dewatering cylinder. The invention solves the problem that the sludge is adhered to the inside of the equipment and is difficult to clean in the prior art.

Description

Sludge treatment system

Technical Field

The invention relates to the technical field of sludge treatment, in particular to a sludge treatment system.

Background

With the advance of the urbanization process, a plurality of river channels are damaged and polluted, so that water flow is not smooth, and a large amount of sludge is accumulated in the river channels. Therefore, the dredging work for the river channel is required to be performed regularly. The cleaned sludge faces the problem of how to treat the sludge. Since sludge is a liquid-containing solid-liquid mixture formed by settling suspended solid particles, in the form of sludge, slush or mud. Therefore, it is necessary to first dewater the moisture contained in the sludge and then dry the dewatered sludge.

At present, the sludge is dewatered by a plate and frame filter press, a centrifugal dehydrator and chemical flocculation dehydration; the sludge drying equipment is a sludge dryer. No matter the sludge is dehydrated or dried, the sludge has certain viscosity and can adhere to the inner wall of the equipment and the inner structure of the equipment, and particularly, the viscosity of the dehydrated sludge is higher. As the sludge treatment work progresses, the sludge adhered to the equipment becomes thicker and thicker, thereby affecting the sludge treatment effect and possibly even causing equipment failure. Therefore, the inside of the equipment needs to be cleaned regularly, the inside of the equipment is difficult to clean due to the fact that the structure of the inside of the equipment is more, and the inside of the equipment is difficult to clean due to too firm adhesion of the sludge, and the sludge adhered to the inside of the equipment can be firmer along with the loss of water in the sludge if the inside of the equipment is not cleaned timely. Therefore, a new sludge treatment system is needed, which can facilitate the cleaning of the inside of the equipment after the sludge is dehydrated, and simultaneously reduce the internal structure of the equipment and avoid the adhesion of the sludge in a large area.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a sludge treatment system, which solves the problem that sludge is adhered to the interior of equipment and is difficult to clean in the prior art.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the invention discloses a sludge treatment system which comprises a dewatering cylinder with an open top, wherein an annular supporting table is transversely fixed on the inner wall of the dewatering cylinder close to the open top of the dewatering cylinder, an inner gear ring with a C-shaped section is arranged on the annular supporting table, a sun gear is arranged at the center of the inner gear ring, a fixed shaft is fixed at the center of the top of the sun gear, a driven gear is fixed on the fixed shaft, and the driven gear is meshed with a driving gear on a motor; the two side surfaces of the sun wheel are transversely provided with annular supporting sheets extending out of the wheel teeth of the sun wheel, a plurality of planet wheels meshed with the inner gear ring and the sun wheel are arranged between the inner gear ring and the sun wheel respectively, and stirring shafts are eccentrically arranged on the bottom surfaces of the sun wheel and each planet wheel and face the bottom of the dewatering cylinder.

Preferably, the fixed shaft is fixed with a support rod fixed with the inner wall of the dewatering cylinder through a bearing, and the driven gear is arranged above the bearing.

Preferably, the stirring shaft is hollow, and the side wall of the stirring shaft is provided with a plurality of liquid outlet holes communicated with the inside of the stirring shaft; through holes communicated with the stirring shaft are formed in the sun wheel and the planet wheel, and a liquid storage tank is fixed above the through holes through a pipeline.

Preferably, two strip-shaped through holes which are separated from each other are arranged in the fixed shaft, one strip-shaped through hole is communicated with a channel arranged in the sun wheel, and the other end of the channel is communicated with the through hole in the sun wheel.

Preferably, the bottom of the inner gear ring is provided with a plurality of limiting columns, and the annular supporting table is provided with limiting grooves corresponding to and matched with the limiting columns.

Preferably, a plurality of sliding grooves which are flush with the top surface of the annular supporting table are vertically arranged on the inner wall of the dewatering cylinder, and fixing columns which correspond to the sliding grooves and are matched with the sliding grooves are arranged on the outer side wall of the sun wheel.

Preferably, a hollow drainage column with a top cover is vertically arranged at the center of the interior of the dewatering cylinder, the top end of the drainage column is positioned below the center of the sun gear, and the other end of the drainage column penetrates out of the bottom of the dewatering cylinder; the drainage column is provided with a first drainage hole symmetrically, and the first drainage hole is provided with an adjusting mechanism for adjusting the opening size of the first drainage hole.

Preferably, the adjusting mechanism comprises an arc-shaped groove which is arranged on the side wall of the drainage column and positioned at the position of the first drainage hole, one end of the arc-shaped groove penetrates out of the top of the drainage column, an arc-shaped plate is arranged in the arc-shaped groove, a second drainage hole which is the same as the first drainage hole in size is arranged on the arc-shaped plate, and the arc-shaped plate and the arc-shaped groove are fixed through a telescopic mechanism; the tops of the two arc-shaped plates are connected through a pressure plate, the middle part of the pressure plate is connected with the output end of an electric push rod, and a U-shaped groove for the pressure plate to move up and down is formed in the side wall between the arc-shaped groove and the inside of the drainage column; when the telescopic mechanism is completely compressed, the first drainage hole and the second drainage hole are coincided.

Preferably, the telescopic mechanism is located in the arc-shaped groove below the first drainage hole, the two side faces of the arc-shaped plate corresponding to the first drainage hole are provided with waterproof pads, the edge part of each waterproof pad extends into the arc-shaped groove, and the waterproof pads are also arranged above the second drainage hole and on the two side walls of the arc-shaped plate.

Preferably, the bottom of the dewatering drum is provided with a discharge flat pipe with an inclined discharge port, and the discharge flat pipe extends into the sludge drying device.

The invention has the following beneficial effects:

1. the invention is characterized in that an annular support table is arranged in a dewatering cylinder, an inner gear ring is arranged on the annular support table, a sun gear is arranged at the center of the inner gear ring, a plurality of planet gears are arranged between the sun gear and the inner gear ring, stirring shafts are eccentrically arranged at the bottoms of the planet gears and the sun gear, a fixed shaft is fixed at the center of the sun gear, a support rod is fixed on the fixed shaft through a bearing, a driven gear is driven by a motor to drive the sun gear to rotate, the planet gears are further driven to rotate in the inner gear ring, and finally the stirring shafts on the planet gears and the sun gear are driven to stir in the dewatering cylinder, so that the.

2. According to the invention, the stirring shaft is arranged to be a hollow structure, the stirring shaft is provided with a plurality of liquid outlet holes, a liquid storage tank communicated with the inside of the stirring shaft is arranged above the sun wheel and the planet wheel, a flocculating agent is stored in the liquid storage tank, and the flocculating agent in the liquid storage tank flows into the stirring shaft. When the sun wheel rotates, the flocculating agent in the stirring shaft is sprayed out through the liquid outlet hole, so that the flocculating agent and the sludge are uniformly mixed.

3. According to the invention, the drainage column which is hollow inside is arranged in the dewatering cylinder, the first drainage hole is arranged on the drainage column, the adjusting mechanism for adjusting the opening size of the first drainage hole is arranged on the first drainage hole, after sludge is stood for layering, the opening height of the first drainage hole of the adjusting mechanism is controlled by the boundary of supernatant and the sludge, so that the sludge is prevented from entering the drainage column, and finally, the sludge can be mixed and stirred and the supernatant can be discharged under the condition that the dewatering cylinder is not opened.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a view taken along line A-A of FIG. 1;

FIG. 3 is a view showing the internal structure of a drainage column;

FIG. 4 is an enlarged view of a portion A of FIG. 3;

FIG. 5 is a sectional view of the ring gear;

FIG. 6 is a cross-sectional view of the sun gear;

FIG. 7 is a view showing the internal structure of the drying apparatus;

in the figure: the device comprises a dewatering cylinder 1, an annular support platform 2, an inner gear ring 3, a sun gear 4, a fixed shaft 5, a driven gear 6, an annular support piece 7, a planet gear 8, a stirring shaft 9, a bearing 10, a support rod 11, a through hole 12, a liquid storage tank 13, a channel 14, a limiting column 15, a sliding chute 16, a fixed column 17, a drainage column 18, a top cover 181, a first drainage hole 19, an arc-shaped groove 20, an arc-shaped plate 21, a second drainage hole 22, a telescopic mechanism 23, a pressing plate 24, an electric push rod 25, a waterproof pad 26, a flat discharge pipe 27, a ball 28, a drying box 29, a partition plate 30, a conveying belt 31, an inclined plate 32, a support column 33, a heat source fan.

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.

Unless otherwise indicated, the technical means used in the examples are conventional means well known to those skilled in the art.

Referring to fig. 1-7, the invention discloses a sludge treatment system, which comprises a dewatering cylinder 1 with an open top, wherein an annular support platform 2 is transversely fixed on the inner wall of the dewatering cylinder 1 near the open top, an inner gear ring 3 with a C-shaped section is arranged on the annular support platform 2, a sun gear 4 is arranged at the center of the inner gear ring 3, a fixed shaft 5 is fixed at the center of the top of the sun gear 4, a driven gear 6 is fixed on the fixed shaft 5, the driven gear 6 is meshed with a driving gear on a motor, the motor is fixed on the dewatering cylinder 1 through a bracket (not shown in the figure), and the bracket is detachably fixed with the dewatering cylinder 1; two side surfaces of the sun wheel 4 are transversely provided with annular supporting sheets 7 extending out of the wheel teeth of the sun wheel 4, a plurality of planet wheels 8 which are respectively engaged with the inner gear ring 3 and the sun wheel 4 are arranged between the inner gear ring 3 and the sun wheel 4, and the bottom surfaces of the sun wheel 4 and each planet wheel 8 and the bottom of the dewatering cylinder 1 are eccentrically provided with stirring shafts 9.

It should be understood that: the planet wheels 8 are positioned between the two annular supporting sheets 7 and meshed with the sun wheel 4, and the planet wheels 8 are also positioned in the C-shaped inner gear ring 3, so that part of the bottom surface of the planet wheels 8 is supported on the step surface below the inner gear ring 3 and the annular supporting sheets 7 below the sun wheel 4, and the planet wheels 8 are prevented from being separated from the inner gear ring 3 and the sun wheel 4. In order to increase the stability of the sun gear 4, a support rod 11 fixed with the inner wall of the dewatering cylinder 1 is fixed on the fixed shaft 5 through a bearing 10, the support rod 11 is detachably fixed with the inner wall of the dewatering cylinder 1, and the position of the support rod 11 is higher than the liquid storage tank 13. The driven gear 6 is disposed above the bearing 10, i.e., the fixed shaft 5 is fixed in an inner ring of the bearing 10, and the support rod 11 is fixed in an outer ring of the bearing 10. The stirring shafts 9 are arranged far away from the circle centers of the planet wheel 8 and the sun wheel 4. When the motor drives the fixed shaft 5 to rotate to drive the sun gear 4 to rotate, each planet wheel 8 and the stirring shaft 9 on the sun gear 4 rotate, and meanwhile, the planet wheels 8 do circular motion in the inner gear ring 3, so that the sludge in the dewatering cylinder 1 is fully mixed with the flocculating agent by the stirring shafts 9, and the sludge and the flocculating agent are completely prevented from being mixed by helical blades or blades in the prior art.

Further, in order to reduce the friction force between the planet wheel 8 and the inner gear ring 3 and the sun wheel 4, a plurality of spherical grooves are formed in the step surface below the C-shaped inner gear ring 3 and the upper surface of the annular support sheet 7 below the sun wheel 4, balls 28 are arranged in the spherical grooves, the bottom surface of the planet wheel 8 is arranged on the balls 28, and when the planet wheel 8 rotates, the balls 28 can reduce the friction force between the planet wheel 8 and the inner gear ring 3 and the sun wheel 4, so that the planet wheel 8 and the sun wheel 4 can run more smoothly.

Further, in order to increase the stability of the inner gear ring 3 and prevent the inner gear ring 3 from shaking during the operation of the planet wheel 8, a plurality of limiting columns 15 are arranged at the bottom of the inner gear ring 3, and limiting grooves which correspond to the limiting columns 15 and are adaptive to the limiting columns are arranged on the annular supporting table 2. When the inner gear ring 3 is placed, the limiting posts 15 are inserted into the limiting grooves, so that the inner gear ring 3 is stably placed on the annular support table 2. Furthermore, a plurality of sliding grooves 16 which are flush with the top surface of the annular supporting table 2 are vertically arranged on the inner wall of the dewatering cylinder 1, and fixing columns 17 which correspond to the sliding grooves 16 and are matched with the sliding grooves are arranged on the outer side wall of the sun gear 4. It should be understood that: the sliding groove 16 corresponds to the fixing post 17, and the limiting post 15 corresponds to the limiting groove, that is, the fixing post 17 on the inner gear ring 3 is inserted into the limiting groove along the sliding groove 16, so that the inner gear ring 3 is fixed on the annular support platform 2.

Further, to avoid that the addition of flocculant from the outside into the dewatering cylinder 1 results in uneven mixing of sludge and flocculant. Thus, a flocculating agent is added to the sludge from the interior of the dewatering cylinder 1. The interior of the stirring shaft 9 is hollow, and the side wall of the stirring shaft is provided with a plurality of liquid outlet holes communicated with the interior of the stirring shaft; moreover, the bottom of the stirring shaft 9 is also provided with a liquid outlet hole. In order to increase the pressure of the flocculating agent sprayed out from the stirring shaft 9, the liquid outlet hole is in a circular truncated cone shape, the small-diameter end faces the outside of the stirring shaft 9, and the large-diameter end faces the inside of the stirring shaft 9. Meanwhile, through holes 12 communicated with the inside of the stirring shaft 9 are formed in the sun wheel 4 and the planet wheel 8, and a liquid storage tank 13 is fixed above the through holes 12 through a pipeline. It should be understood that: the liquid storage tank 13 is filled with flocculating agent, and the flocculating agent in the liquid storage tank 13 is sprayed out from the through hole 12 by the stirring shaft 9 in the rotating process, so that the flocculating agent and the sludge are mixed more uniformly.

Furthermore, in the process of stirring the sludge, if a flocculating agent is required to be added into the dewatering cylinder 1, and at the moment, if the motor is turned off, the sludge in the sludge can be settled in the process of stirring and mixing the flocculating agent and the sludge, so that the resistance given to the stirring shaft 9 by the sludge in the process of rotating the stirring shaft 9 again is large, and the risk of damaging the stirring shaft 9 exists. Therefore, it is necessary to add a flocculant to the dewatering cylinder 1 during the operation of the motor. The method specifically comprises the following steps: two strip-shaped through holes which are separated from each other are arranged in the fixed shaft 5, wherein one strip-shaped through hole is communicated with a channel 14 arranged in the sun wheel 4, and the other end of the channel 14 is communicated with a through hole 12 on the sun wheel 4. It should be understood that: the strip-shaped through hole on the fixed shaft 5 is communicated with the through hole 12 through the channel 14, and when flocculating agents are injected into the strip-shaped through hole, the flocculating agents enter the stirring shaft 9 fixed on the sun wheel 4 along the strip-shaped through hole, the channel 14 and the through hole 12, and then enter the dewatering cylinder 1.

Further, in order to prevent the flocculant from staying in the passage 14, the passage 14 is provided so as to be inclined from the strip-shaped through hole to the through hole 12, thereby facilitating the flow of the flocculant into the agitating shaft 9. The mode of injecting the flocculating agent into the bar through-hole can be a hose of top fixed connection at the bar through-hole, and a single channel rotary joint is connected to the other end of hose, and single channel rotary joint adds the liquid case through a flocculating agent of another hose connection, thereby adds the flocculating agent in to dewatering cylinder 1 through adding the flocculating agent to the liquid incasement.

In use, the motor drives the fixed shaft 5 to rotate with the sun gear 4, the sun gear 4 drives the planet gears 8 to rotate around the inner gear ring 3, and therefore the stirring shaft 9 on each planet gear 8 rotates along the inner gear ring 3 while rotating. Meanwhile, the flocculant injected in advance in the liquid storage tank 13 flows into the stirring shaft 9 through the through hole 12, and under the action of the centrifugal force of the stirring shaft 9, the flocculant in the stirring shaft 9 is sprayed out through the liquid outlet hole until the flocculant in the liquid storage tank 13 is completely sprayed out, and the amount of the flocculant in the liquid storage tank 13 is set according to the amount of sludge added into the dewatering cylinder 1. The rotation speed and time of the motor are controlled by the controller. And after the sludge and the flocculating agent are completely and uniformly mixed, closing the motor and standing. Whether in the stirring process, a flocculating agent is required to be added into the sludge in the dewatering cylinder 1 or not is set according to the actual situation.

When the sludge in the dewatering cylinder 1 is settled and layered, the supernatant liquid needs to be discharged. Therefore, a hollow drainage column 18 with a top cover 181 is vertically arranged at the center of the inside of the dewatering cylinder 1, the top end of the drainage column 18 is positioned below the center of the sun gear 4, and the other end penetrates out of the bottom of the dewatering cylinder 1; the drainage column 18 is symmetrically provided with a first drainage hole 19, and the first drainage hole 19 is provided with an adjusting mechanism for adjusting the opening size of the first drainage hole. It should be understood that: the top cover 181 is screwed and fixed with the drainage column 18 by screw threads, and one end of the drainage column 18 penetrating out of the bottom of the dewatering cylinder 1 is connected with a water storage tank. In order to increase the drainage speed, the first drainage holes 19 are preferably arranged symmetrically, but may be arranged one by one.

The adjustment mechanism includes on the lateral wall of drainage post 18, be located the arc wall 20 at drainage post 18 top is worn out to the one end of seting up on the position of first drainage hole 19, and the other end is located the below of first drainage hole 19, and the arc 21 that is provided with in the arc wall 20, the arc 21 and the 20 looks adaptations of arc, make arc 21 just can reciprocate in arc 20. A second drain hole 22 with the same size as the first drain hole 19 is formed in the arc-shaped plate 21, and the arc-shaped plate 21 and the arc-shaped groove 20 are fixed through a telescopic mechanism 23; the tops of the two arc-shaped plates 21 are connected through a pressure plate 24, the middle part of the pressure plate 24 is connected with the output end of an electric push rod 25, and a U-shaped groove for the pressure plate 24 to move up and down is formed in the side wall between the arc-shaped groove 20 and the inside of the drainage column 18; when the telescopic mechanism 23 is fully compressed, the first drain hole 19 and the second drain hole 22 coincide.

It should be noted that: the top cover 181 is provided with a threading hole, the electric wire of the electric push rod 25 extends into the other strip-shaped through hole through the threading hole and penetrates out, and the end part of the electric wire is connected with a plug. In order to avoid the influence on the electric wire in the rotating process of the fixed shaft 5, a plastic pipe is sleeved outside the electric wire, one end of the plastic pipe is fixed on the top cover 181 and is fixed in the inner ring of the bearing, the outer ring of the bearing is fixed in the strip-shaped through hole, the other end of the plastic pipe extends out of the strip-shaped through hole, and the electric wire is connected with a plug or a connector lug, so that the electric wire cannot be influenced by the fixed shaft 5 in the rotating process.

When the device is used, only after the sludge is completely placed, the running stroke of the electric push rod 25 is determined according to the layering position of the settled sludge and the supernatant, and the position where the first drain hole 19 and the second drain hole 22 are overlapped is prevented from being positioned below the settled sludge. The position of the settled sludge and supernatant stratification is determined in two ways. One is that: an observation window is arranged on the side wall of the dewatering cylinder 1, scale marks are arranged on the observation window, the position of supernatant is observed manually, then the controller is operated to control the electric push rod 25 to operate, the press plate 24 is pressed downwards until the first drainage hole 19 and the second drainage hole 22 are overlapped, the bottom surface of the drainage hole is higher than a settled sludge layer, namely, the drainage hole is positioned in the supernatant, and the sludge is prevented from entering the drainage column 18 through the drainage hole. The stroke of the electric push rod 25 is estimated according to the sum of the distances from the first drain hole 19 to the first drain hole 19. In other words, it is possible to adjust until the supernatant liquid is discharged by observing the position where the first drain hole 19 is exposed to the liquid surface of the supernatant liquid. The other is as follows: the side wall of the dewatering cylinder 1 is sequentially provided with a plurality of probe type turbidity detectors from top to bottom, the controller is connected with the turbidity detectors, detected signals are transmitted to the controller by the turbidity detectors, and the controller controls the electric push rod 25 to operate according to the fed-back signals. For example, when the signal detected by the detector No. 1 indicates that the position is sludge, and the detector No. 2 above the detector No. 1 is supernatant, the opening of the first drain hole 19 only needs to be controlled to be located between the detector No. 1 and the detector No. 2. It should be noted that: after the sludge is kept stand and the electric push rod 25 needs to be operated, a plug or a connector lug is connected into the controller so as to control the opening and closing of the electric push rod 25.

The arc-shaped groove 20 is provided on the side having the first drain hole 19, and has a width and a length larger than the first drain hole 19. The retractable mechanism 23 may be a retractable plate or a spring, or other components with a certain retractable capability. The first drain hole 19 and the second drain hole 22 are overlapped from a partial overlap to a complete overlap by pressing the arc plate 21, that is, the opening is gradually enlarged from the top to the bottom by the first drain hole 19. The side walls between the arcuate slot 20 and the interior of the drain post 18 block the upward and downward movement of the pressure plate 24 during depression of the pressure plate 24. Therefore, a U-shaped groove for the pressing plate 24 to move up and down is formed on the side wall between the arc-shaped groove 20 and the drainage column 18. In the invention, when the pressing plate 24 presses the arc-shaped plate 21 downwards until the first drain hole 19 and the second drain hole 22 are completely overlapped, the bottom plate surface of the pressing plate 24 is just attached to the bottom of the U-shaped groove, so that the second drain hole 22 is prevented from extending into the arc-shaped groove 20, the first drain hole 19 and the second drain hole 22 are dislocated, and the supernatant enters the arc-shaped groove 20. The width of the pressing plate 24 is less than or equal to the chord length of the arc plate 21. The width of the pressure plate 24 is equal to the chord length of the arc plate 21 in the invention.

Further, in order to prevent the supernatant from entering the arc-shaped groove 20 during the process from the time when the first drain hole 19 is completely closed to the time when the first drain hole 19 and the second drain hole 22 are completely overlapped. The telescopic mechanism 23 is positioned in the arc-shaped groove 20 below the first drainage hole 19, the thickness of the arc-shaped plate 21 is set to be smaller than the width of the arc-shaped groove 20, and the bottom part of the arc-shaped plate 21 extends into the arc-shaped groove 20. Waterproof pads 26 are arranged on two side surfaces of the arc-shaped plate 21 corresponding to the first drainage holes 19, and edge parts of the waterproof pads 26 extend into the arc-shaped grooves 20. The section of the waterproof pad 26 in the vertical direction is trapezoidal, so that the upper side and the lower side of the waterproof pad 26 are inclined, and the waterproof pad 26 can more easily extend into the arc-shaped groove 20. The waterproof pad 26 is preferably a rubber pad having a certain elasticity. Waterproof pads 26 are also arranged above the second drain holes 22 and on two side walls of the arc-shaped plate 21. When the arc plate 21 moves downwards, the waterproof pad 26 always seals the gap between the arc groove 20 and the arc plate 21, thereby preventing supernatant from entering the arc groove 20. When the first drain hole 19 and the second drain hole 22 are completely overlapped, the waterproof pad 26 above the second drain hole 22 also closes the gap between the arc-shaped groove 20 and the arc-shaped plate 21 above the waterproof pad.

The bottom of the dewatering cylinder 1 is provided with a discharge flat pipe 27 with an inclined discharge port, and the discharge flat pipe 27 extends into the sludge drying device to dry sludge. The drying device comprises a drying box 29 and a partition plate 30 vertically fixed in the drying box 29, wherein the drying box 29 is divided into a drying area and a cooling area by the partition plate 30. In the drying area, a conveying belt 31 driven by two symmetrical transmission wheels is transversely arranged in the drying box 29, shafts on two sides of the transmission wheels are fixed on the side wall of the drying box 29 through bearings, and a shaft of one transmission wheel extends out of the drying box 29 and is connected with a motor to drive the conveying belt 31 to run. A plurality of heat source fans 34 are arranged on the top of the drying box 29 and above the conveyer belt 31 to dry the sludge on the conveyer belt 31. Hot steam generated during the drying of the sludge is blown out through an air outlet 37 provided on a side wall of the drying box 29, and the air outlet 37 is provided at a position corresponding to the conveyor belt 31. A pipe is connected to the air outlet 37, and the other end of the pipe is connected to the water storage tank, and immersed in the supernatant liquid to heat the supernatant liquid, and the cooled hot steam is discharged.

The discharge port of the flat discharge pipe 27 is located above the conveyer belt 31, the tip of the bevel port of the flat discharge pipe faces the conveying direction of the conveyer belt 31 (for example, the conveyer belt 31 runs to the right in the invention), and the bevel port and the conveyer belt 31 form a certain angle. It should be understood that: the thickness that silt was put at the stand on conveyer belt 31 adjusts according to the distance between flat 27 bevel connection point portions of ejection of compact and the conveyer belt 31, and at the in-process that conveyer belt 31 moved, the flat 27 ejection of compact makes silt fall on conveyer belt 31, and the bevel connection point portion of the flat 27 of ejection of compact simultaneously can carry out the action of a striking off to the silt on the conveyer belt 31, makes the thickness of silt unanimous. In the invention, the width of the conveyer belt 31 is more than or equal to the length of the discharging flat tube 27, so that the sludge is prevented from falling off the conveyer belt 31. In addition, a rib may be provided on each side of the conveyor belt 31 to further prevent sludge from falling off the edge of the conveyor belt 31.

In the cooling area, the slope is provided with swash plate 32, swash plate 32 is by conveyer belt 31 to keeping away from the slope of conveyer belt 31 direction setting, baffle 30 is passed to the one end of swash plate 32, laminate mutually with the last turn of conveyer belt 31, the position that swash plate 32 and conveyer belt 31 laminated mutually is the arc promptly, when making the mud after the stoving move to the arc position of swash plate 32, its arc position shovels the mud on the conveyer belt 31, enter into on the swash plate 32, when the mud after the stoving continuously enters into on the swash plate 32, mud can be along swash plate 32 landing to the lower extreme. The other end of the inclined plate 32 is abutted against the inner wall of the drying box 29, a sludge outlet communicated with the inclined plate 32 is arranged on the side wall of the drying box 29, a discharge pipe is arranged on the outlet, and an electronic valve is arranged on the discharge pipe. A support column 33 is fixed to the bottom of the sloping plate 32. A cooling fan 36 is fixed at the top of the drying box 29 above the inclined plate 32, and an air port of the cooling fan 36 is arranged towards a sludge outlet, so that cold air is prevented from blowing into a drying area through the inclined plate 32, and the dried sludge is cooled.

Further, to prevent the sludge on the inclined plate 32 from falling into the drying box 29, baffles 35 are provided on both sides of the inclined plate 32 in the longitudinal direction.

The electric valve and the motor on the driving wheel, the motor engaged with the driven gear 6, the electric push rod 25, the heat source fan 34 and the cooling fan 36 are all connected with the controller. The opening time of the electronic valve is controlled by controlling the rotating speed and the running time of a motor on the driving wheel, so that the sludge on the inclined plate is cleaned; and simultaneously controls the timing of turning on and off the heat source fan 34 and the cooling fan 36.

After sludge treatment is finished, if the dewatering cylinder 1 needs to be cleaned, the water storage tank and the liquid adding tank are connected through a pipeline, and/or hot water in the water storage tank is injected into the liquid storage tank 13, the electric push rod 25 is connected in a power-off mode, the motor is started, the stirring shaft 9 is rotated, the hot water is sprayed out of the liquid outlet hole, and therefore sludge adhered to the inner wall of the dewatering cylinder 1 and the stirring shaft 9 is cleaned, and the adhered sludge is more prone to falling off due to the fact that the hot water is adopted for cleaning; moreover, the hot water sprayed out of the liquid outlet hole has certain pressure, and the cleaning effect on the dewatering cylinder 1 is ensured to the maximum extent. After the cleaning is finished, the cleaned water is discharged from an outlet at the bottom of the dewatering cylinder 1. Of course, the liquid filling tank and/or the liquid storage tank 13 can be cleaned by filling with clean water.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. A sludge treatment system comprising a dewatering drum (1) with an open top, characterized in that: an annular supporting table (2) is transversely fixed on the inner wall of the dewatering drum (1) close to the opening of the dewatering drum, an inner gear ring (3) with a C-shaped section is arranged on the annular supporting table (2), a sun wheel (4) is arranged at the center of the inner gear ring (3), a fixed shaft (5) is fixed at the center of the top of the sun wheel (4), a driven gear (6) is fixed on the fixed shaft (5), and the driven gear (6) is meshed with a driving gear on a motor; two side surfaces of the sun wheel (4) are transversely provided with annular supporting sheets (7) extending out of the wheel teeth of the sun wheel, a plurality of planet wheels (8) which are respectively meshed with the inner gear ring (3) and the sun wheel (4) are arranged between the inner gear ring (3) and the sun wheel (4), and stirring shafts (9) are eccentrically arranged on the bottom surfaces of the sun wheel (4) and each planet wheel (8) and face the bottom of the dewatering cylinder (1).

2. A sludge treatment system as claimed in claim 1, wherein: a support rod (11) fixed with the inner wall of the dewatering cylinder (1) is fixed on the fixed shaft (5) through a bearing (10), and the driven gear (6) is arranged above the bearing (10).

3. A sludge treatment system as claimed in claim 1, wherein: the stirring shaft (9) is hollow, and the side wall of the stirring shaft is provided with a plurality of liquid outlet holes communicated with the inside of the stirring shaft; the sun wheel (4) and the planet wheel (8) are both provided with through holes (12) communicated with the stirring shaft (9), and a liquid storage tank (13) is fixed above the through holes (12) through a pipeline.

4. A sludge treatment system as claimed in claim 1, wherein: two strip-shaped through holes which are separated from each other are arranged in the fixed shaft (5), one strip-shaped through hole is communicated with a channel (14) arranged in the sun wheel (4), and the other end of the channel (14) is communicated with a through hole (12) on the sun wheel (4).

5. A sludge treatment system as claimed in claim 1, wherein: the bottom of ring gear (3) is provided with several spacing post (15), be provided with the spacing groove that corresponds and the adaptation with spacing post (15) on annular brace table (2).

6. A sludge treatment system as claimed in claim 1, wherein: the inner wall of the dewatering cylinder (1) is vertically provided with a plurality of sliding chutes (16) which are flush with the top surface of the annular supporting platform (2), and the outer side wall of the sun gear (4) is provided with fixing columns (17) which correspond to the sliding chutes (16) and are adaptive to the sliding chutes.

7. A sludge treatment system as claimed in claim 1, wherein: a hollow drainage column (18) with a top cover (181) is vertically arranged at the center of the inside of the dewatering cylinder (1), the top end of the drainage column (18) is positioned below the center of the sun gear (4), and the other end of the drainage column penetrates out of the bottom of the dewatering cylinder (1); the drainage column (18) is symmetrically provided with a first drainage hole (19), and the first drainage hole (19) is provided with an adjusting mechanism for adjusting the opening size of the first drainage hole.

8. A sludge treatment system as claimed in claim 7 wherein: the adjusting mechanism comprises an arc-shaped groove (20) which is arranged on the side wall of the drainage column (18) and is positioned at the position of the first drainage hole (19), one end of the arc-shaped groove (20) penetrates out of the top of the drainage column (18), an arc-shaped plate (21) is arranged in the arc-shaped groove (20), a second drainage hole (22) which is the same as the first drainage hole (19) in size is arranged on the arc-shaped plate (21), and the arc-shaped plate (21) and the arc-shaped groove (20) are fixed through a telescopic mechanism (23); the tops of the two arc-shaped plates (21) are connected through a pressure plate (24), the middle part of the pressure plate (24) is connected with the output end of an electric push rod (25), and a U-shaped groove for the pressure plate (24) to move up and down is formed in the side wall between the arc-shaped groove (20) and the inside of the drainage column (18); when the telescopic mechanism (23) is completely compressed, the first drain hole (19) and the second drain hole (22) are overlapped.

9. A sludge treatment system as claimed in claim 8, wherein: the telescopic mechanism (23) is positioned in the arc-shaped groove (20) below the first water drainage hole (19), a waterproof pad (26) is arranged on the two side faces of the arc-shaped plate (21) corresponding to the first water drainage hole (19), the edge part of the waterproof pad (26) extends into the arc-shaped groove (20), and the waterproof pad (26) is also arranged on the two side walls of the arc-shaped plate (21) above the second water drainage hole (22).

10. A sludge treatment system as claimed in claim 1, wherein: the bottom of the dewatering cylinder (1) is provided with a discharge flat pipe (27) with a discharge port in an inclined shape, and the discharge flat pipe (27) extends into the sludge drying device.