CN112094038A

CN112094038A - Sludge treatment equipment

Info

Publication number: CN112094038A
Application number: CN202011259806.4A
Authority: CN
Inventors: 曹玉鹏; 宋明桂; 张文超; 徐桂中; 柳长江; 滕帅; 杜嘉林
Original assignee: Weifang University
Current assignee: Weifang University
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2020-12-18
Anticipated expiration: 2040-11-12
Also published as: CN112094038B

Abstract

The invention discloses sludge treatment equipment, which comprises a rack, wherein a tank body is arranged on the rack, an outer cylinder with an opening at the lower end is arranged in the tank body, the outer cylinder is connected with the top wall of the tank body, the upper part of the outer cylinder penetrates through the top wall of the tank body to extend outwards and is provided with a slag discharge port, a rotating cylinder driven by a first driving device is arranged in the tank body, the rotating cylinder comprises an expansion part positioned in the outer cylinder, an upper cylinder body and a lower cylinder body which are connected with the expansion part, a first spiral blade is arranged on the peripheral surface of the expansion part, a central shaft is arranged in the lower cylinder body, a second spiral blade is arranged between the lower cylinder body and the central shaft, the rotating directions of the first spiral blade and the second spiral blade are the same, a plurality of discharge holes are arranged in the middle part of the expansion part, a splash guard is arranged in the inner cavity. The invention can treat thin sludge, occupies less space, and has the advantages of higher working efficiency and large sludge treatment capacity.

Description

Sludge treatment equipment

Technical Field

The invention relates to the field of sludge treatment, in particular to sludge treatment equipment.

Background

Industrial production produces sludge, which is directly discharged to pollute the environment, and further treatment is required. The current method for sludge treatment is as follows: 1. firstly, thin sludge generated in industrial production is put into a sedimentation tank for sedimentation, supernatant is discharged outwards through an overflow port, and thick sludge is remained. 2. And (4) sending the thick sludge into a sludge thickener for further concentration treatment to obtain sludge with smaller water content. Common sludge thickeners include plate-and-frame sludge thickeners, spiral-stacked sludge thickeners, and the like, and sludge generated after concentration occupies a small volume and can be buried or used as engineering filler.

The existing sludge treatment equipment has the following defects: 1. the sludge thickener can only treat thicker sludge, and has poor treatment effect on thin sludge. 2. A sedimentation tank is required to be arranged for treating the thin sludge, the sedimentation tank needs to occupy the land, and the utilization rate is not high for enterprises with less sludge production.

Disclosure of Invention

The invention aims to provide a sludge treatment device which is suitable for treating thin sludge and has high working efficiency.

The invention comprises a frame, a tank body is vertically arranged on the frame, the structure is characterized in that an outer cylinder with a closed upper end and an open lower end is arranged in the tank body, the outer cylinder is connected with the top wall of the tank body, the upper part of the outer cylinder penetrates through the top wall of the tank body to extend outwards, a slag discharge port is arranged at the part extending outwards, a rotatable rotating cylinder is arranged in the tank body, a first driving device for driving the rotating cylinder to rotate is arranged on the frame, the upper end of the rotating cylinder penetrates through a through hole on the top wall of the outer cylinder to extend outwards, the lower end of the rotating cylinder extends to the bottom of the tank body, the rotating cylinder comprises an expansion part positioned in the outer cylinder, an upper cylinder body and a lower cylinder body connected with the expansion part, a first helical blade is arranged on the outer peripheral surface of the expansion part, a central shaft is arranged in the lower cylinder body, a second helical blade is arranged, the middle part of the expansion part is provided with a plurality of discharge holes, the inner cavity of the expansion part is provided with a mudguard, the discharge holes are positioned below the mudguard, and the tank body is provided with a dosing port, a feeding port and a water outlet. After the structure is adopted, thin sludge generated in industrial production can be added into the tank body through the feed inlet, a flocculating agent is added into the tank body through the chemical adding port, the thin sludge is subjected to flocculation and precipitation, precipitates fall to the bottom of the tank body to form thick sludge, the rotating cylinder rotates forwards, the thick sludge at the bottom of the tank body is sent into the inner cavity of the expansion part by the second spiral blade and flows to the inner cavity of the outer cylinder through the discharge hole, the first spiral blade rotates to extrude the thick sludge flowing into the inner cavity of the outer cylinder, sludge with small water content is discharged outwards through the residue discharge port, extruded water can be reused or discharged after purification treatment after being sent out through the water discharge port, the thin sludge generated in industrial production can be treated by the sludge treatment equipment, a precipitation tank is not required to be arranged, the occupied space is small, and the sludge generated in industrial production can be treated at any time, the flocculation precipitation and the solid-liquid separation are carried out integrally, and the working efficiency is higher.

The outer cylinder is of a conical structure with the diameter gradually increasing from top to bottom. Adopt space in the urceolus from up more and more littleer down after the above-mentioned structure, first helical blade is more and more serious to the extrusion of dense mud, can improve solid-liquid separation's effect from this, and the mud sediment moisture content of separation is lower, and subsequent processing is more convenient.

And a mud-blocking ring is connected to the part, which is positioned above the first helical blade and close to the top wall of the outer cylinder, on the rotating cylinder, and the diameter of the mud-blocking ring is larger than that of the through hole on the top wall of the outer cylinder. The mud-guard ring can prevent mud from directly flowing out from the through hole on the top wall of the outer barrel, and is favorable for guiding the mud to be discharged outwards through the slag discharge port.

The first driving device comprises a driven belt wheel arranged at the upper end part of the upper barrel and a motor arranged on the rack, a driving belt wheel is arranged on a power output shaft of the motor, and a transmission belt is connected between the driving belt wheel and the driven belt wheel. The positive and negative rotation of the motor is controllable, and the positive and negative rotation of the rotary drum can be conveniently switched.

The water retaining ring is arranged at the position below the outer barrel in the tank body, the middle part of the water retaining ring is provided with a conical drainage part which is upwards raised and gradually reduced in diameter, and the upper end of the conical drainage part extends to the part where the expansion part is connected with the lower barrel. The water that mud received the extrusion back separation of first helical blade can drainage to the manger plate ring through toper drainage portion, and can not directly flow into jar body bottom, and solid-liquid separation is more thorough.

The water outlet is arranged above the water retaining ring and is lower than the top end of the conical drainage part, the water outlet is connected with a first water pipe, the part, which is positioned below the water retaining ring and is close to the water retaining ring, on the tank body is connected with a second water pipe, a three-way valve is arranged between the first water pipe and the second water pipe, the water inlet of the three-way valve is connected with the first water pipe, one water outlet of the three-way valve is connected with the second water pipe, the other water outlet of the three-way valve is connected with a water drainage pipe, and a chemical adding. The three-way valve can connect the first water pipe with the drain pipe, or connect the first water pipe with the second water pipe, when the first water pipe is connected with the drain pipe, the water separated by the thick sludge extruded by the first helical blade can be discharged through the drain pipe for reuse or purification and then discharged outwards, when the first water pipe is connected with the second water pipe, a part of water can be stored above the water retaining ring, so that flocculant powder can be added into the tank body through the dosing port, the added flocculant powder can be washed away by the water flowing down along the conical drainage part, and then the water enters the sludge below the water retaining ring through the second water pipe, so as to realize the mixing of the flocculant and the thin sludge, and the working procedure can be saved because the flocculant solution does not need to be prepared separately, the flocculant can be washed into the lower part of the water retaining ring by the water flowing down along the conical drainage part, and naturally forms the flocculant solution in the process of water flowing down, thereby saving water.

The rotatable movable support is installed at the position below the water retaining ring in the tank body, the movable support comprises a cross beam and two drooping support arms connected to two ends of the cross beam, a plurality of stirring teeth extending to one side of the rotating cylinder are arranged on the two drooping support arms at intervals, and an overrunning clutch capable of driving the movable support to rotate through the rotating cylinder when the rotating cylinder rotates reversely is arranged between the cross beam and the rotating cylinder. The overrunning clutch has the functions of forward separation and reverse connection, is in a separation state when the rotating cylinder rotates in the forward direction, is in a power connection state when the rotating cylinder rotates in the reverse direction, can drive the movable support to rotate, and stirs the sludge and the flocculating agent by the stirring teeth, so that the flocculating agent and the sludge are fully mixed, and the settling speed and the settling effect of the sludge are improved.

Be connected with the overflow room on the outer wall of the jar body, the position that the overflow room is close to the bottom is connected with the overflow pipe, install control flap on the overflow pipe, be equipped with the overflow hole of intercommunication overflow room on the jar body, the overflow hole is the slot hole of vertical extension, the overflow indoor install can slide from top to bottom in order to adjust the overflow baffle of overflow hole shutoff height, be connected with the lifting rod that stretches to the top on the overflow baffle, the upper end of overflow room is connected with guide sleeve, lifting rod passes this guide sleeve, be equipped with the screw hole on guide sleeve's the section of thick bamboo wall and be equipped with locking. After adopting above-mentioned structure, can take place to deposit after the flocculating agent is added to rarefied mud mixes, the supernatant can get into the overflow room through the overflow hole, the outside discharge of rethread overflow pipe, with the handling capacity that reduces mud, and the work efficiency is improved, can change the height on the overflow baffle through making the lifting rod go up and down, make the high phase-match of overflow height and supernatant department, can lock the lifting rod after screwing the locking bolt, thereby make overflow baffle keep its operating position who locates, overflow baffle can avoid adding rarefied mud or the in-process of stirring with the complete shutoff of overflow hole has mud to spill over, close control flap and can further avoid the situation that mud spills over to take place.

The position on the tank body close to the overflow chamber is provided with a transparent observation window, the upper end of the lifting rod is connected with an operating rod extending downwards, and the lower end of the operating rod is flush with the upper edge of the overflow baffle. The boundary between the supernatant and the lower sediment can be observed through the transparent observation window, the operating rod extending downwards not only lowers the operating position of the lifting overflow baffle, but also has the marking function, when the lower end of the operating rod is flush with the boundary between the supernatant observed through the transparent observation window, the upper edge of the overflow baffle is just positioned at the boundary, and the supernatant is completely discharged as far as possible.

The urceolus rotates with jar body roof to be connected, is equipped with in the frame to be used for ordering about urceolus pivoted second drive arrangement, is equipped with the infiltration region on the section of thick bamboo wall of urceolus, and the infiltration region is equipped with a plurality of infiltration holes, is connected with the mud scraper towards the infiltration region on the first helical blade. After adopting above-mentioned structure, the urceolus can rotate with the speed that is different from the rotary drum under the drive of second drive arrangement, makes the moisture that contains in the mud outwards ooze through the infiltration hole through centrifugal action, has further improved sludge treatment's work efficiency. The mud scraping plate can rotate along with the rotating cylinder and is used for scraping the mud adhered to the water seepage area to avoid the water seepage hole from being blocked.

The invention has the beneficial effects that: the sludge treatment equipment can treat the thin sludge generated in industrial production, does not need to be provided with a special sedimentation tank, and occupies less space; sludge produced in industrial production can be treated at any time, flocculation precipitation and solid-liquid separation are carried out integrally, and the working efficiency is higher; the sludge treatment equipment can continuously work by controlling the forward and reverse rotation of the rotating cylinder and the state switching of the three-way valve, so that the working efficiency of sludge treatment is improved, and the sludge treatment capacity is increased.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;

FIG. 3 is a schematic structural view of a further improvement in a second embodiment of the present invention;

fig. 4 is a schematic structural view of a further modification in the third embodiment of the present invention.

Detailed Description

In the embodiment shown in fig. 1 and 2, the sludge treatment equipment comprises a frame 1, a vertically arranged tank body 2 is installed on the frame 1, the tank body 2 comprises a tank body 38 with an upward opening and an upper cover 39 installed at the opening of the tank body 38, flanges 40 are respectively arranged on the upper cover 39 and the tank body 38, the two flanges 40 are connected together through bolts and nuts, and the upper cover 39 forms the top wall of the tank body 2.

The internal upper end of being equipped with of jar is sealed, lower extreme open-ended urceolus 3, urceolus 3 is connected with jar body 2 roof, and the connection between urceolus 3 and the jar body 2 roof can be fixed connection also can be the rotation connection, and the roof that jar body 2 was passed on the upper portion of urceolus 3 outwards stretches out and the position that outwards stretches out is equipped with row cinder notch 4, is equipped with rotatable rotating barrel 5 in jar body 2, is equipped with in the frame 1 to be used for ordering about rotating barrel 5 pivoted drive arrangement.

In order to realize the rotation of the rotary drum 5, the upper drum 7 is rotatably connected to the frame 1 through a first bearing 18, a fixed bracket 19 is arranged in the tank body 2, and the lower drum 8 is rotatably connected to the fixed bracket 19 through a second bearing 20.

In order to drive the rotary drum 5, the first driving device in this embodiment includes a driven pulley 21 mounted on the upper end of the upper drum 7 and a motor 22 mounted on the frame 1, a driving pulley 23 is mounted on a power output shaft of the motor 22, and a transmission belt 24 is connected between the driving pulley 23 and the driven pulley 21.

The upper end of the rotating cylinder 5 penetrates through a through hole on the top wall of the outer cylinder 3 and extends outwards, the lower end of the rotating cylinder 5 extends to the bottom of the tank body 2, the rotating cylinder 5 comprises an expansion part 6 positioned in the outer cylinder 3, an upper cylinder body 7 and a lower cylinder body 8 which are connected with the expansion part 6, and the peripheral surface of the expansion part 6 is provided with a first helical blade 9. The outer cylinder 3 is a tapered structure with a diameter gradually increasing from top to bottom. The rotating cylinder 5 is connected with a mud guard ring 17 at a position which is above the first helical blade 9 and close to the top wall of the outer cylinder 3, and the diameter of the mud guard ring 17 is larger than that of the through hole on the top wall of the outer cylinder 3.

The lower barrel 8 is internally provided with a central shaft 10, a second helical blade 11 is arranged between the lower barrel 8 and the central shaft 10, the rotating directions of the first helical blade 9 and the second helical blade 11 are the same, the middle part of the expansion part 6 is provided with a plurality of discharge holes 12, the inner cavity of the expansion part 6 is provided with a mudguard 13, the discharge holes 12 are positioned below the mudguard 13, and the tank body 2 is provided with a dosing port 14, a feeding port 15 and a water outlet 16.

A water retaining ring 25 is arranged at the position below the outer cylinder 3 in the tank body 2, a conical drainage part 26 which protrudes upwards and has a gradually reduced diameter is arranged in the middle of the water retaining ring 25, and the upper end of the conical drainage part 26 extends to the part where the expansion part 6 is connected with the lower cylinder 8. The water outlet 16 is arranged above the water retaining ring 25 and is lower than the top end of the conical drainage part 26, the water outlet 16 is connected with a first water pipe 27, the part of the tank body 2, which is positioned below the water retaining ring 25 and is close to the water retaining ring 25, is connected with a second water pipe 28, a three-way valve 29 is arranged between the first water pipe 27 and the second water pipe 28, the water inlet of the three-way valve 29 is connected with the first water pipe 27, one water outlet of the three-way valve 29 is connected with the second water pipe 28, the other water outlet of the three-way valve 29 is connected with a water outlet pipe 30, and the chemical adding port 14 is arranged on the tank body 2 and is positioned above the water retaining ring 25.

The rotatable movable support 31 is installed at the position below the water retaining ring 25 in the tank body 2, the movable support 31 comprises a cross beam 32 and two drooping support arms 33 connected to two ends of the cross beam 32, a plurality of stirring teeth 34 extending to one side of the rotating cylinder 5 are arranged on the two drooping support arms 33 at intervals up and down, and an overrunning clutch 35 capable of driving the movable support 31 to rotate through the rotating cylinder 5 when the rotating cylinder 5 rotates reversely is arranged between the cross beam 32 and the rotating cylinder 5.

In order to rotatably connect the movable support 31 to the tank 2, the inner wall of the tank 2 is provided with an annular guide rail 36, and two lower hanging arms 33 are respectively fixedly connected with a sliding block 37, and the sliding block 37 is slidably connected to the annular guide rail 36.

The working mode of the sludge treatment equipment is as follows: thin sludge generated in industrial production is sent into the tank body 2 through the feed inlet 15, a flocculant solution is added into the tank body 2 through the chemical adding port 14, the thin sludge is subjected to flocculation precipitation, precipitates fall to the bottom of the tank body 2 to become thick sludge, the motor 22 drives the rotary barrel 5 to rotate in the forward direction, the thick sludge at the bottom of the tank body 2 is sent into the inner cavity of the expansion part 6 by the second spiral blade 11 and then flows into the inner cavity of the outer barrel 3 through the discharge hole 12, the thick sludge flowing into the inner cavity of the outer barrel 3 is extruded by the rotation of the first spiral blade 9, sludge with small water content is discharged outwards through the residue discharge port 4, the extruded water flows downwards, then flows into a space above the water retaining ring 25 along the conical drainage part 26, and finally is discharged outwards through the water discharge port 16. Freewheel clutch 35 has forward separation, reverse joint's effect, and freewheel clutch 35 is in the disengagement state when rotating section of thick bamboo 5 forward rotation, and freewheel clutch 35 is in the power engagement state when rotating section of thick bamboo 5 reverse rotation, can drive movable support 31 from this and rotate, and stirring tooth 34 stirs the mixture of mud and flocculating agent for flocculating agent and mud more abundant mixture improves the sedimentation rate and the precipitation effect of mud. The three-way valve 29 can connect the first water pipe 27 with the water discharge pipe 30, or connect the first water pipe 27 with the second water pipe 28, when the first water pipe 27 is connected with the water discharge pipe 30, the water separated from the thick sludge extruded by the first helical blade 9 can be discharged through the water discharge pipe 30 for reuse or purification and then discharged outwards, when the first water pipe 27 is connected with the second water pipe 28, a part of water can be stored above the water retaining ring 25, so that the flocculant powder can be added into the tank body 2 through the chemical adding port 14, the added flocculant powder can be washed away by the water flowing down along the conical drainage part 26 and then enters the sludge below the water retaining ring 25 through the second water pipe 28, the rotating cylinder 5 rotating in the reverse direction drives the movable bracket 31 to rotate, the sludge is stirred by the stirring teeth 34, the sludge is fully mixed with the washed flocculant, thereby the step of separately preparing flocculant solution can be omitted, can also realize the full use of sewage and reduce the waste of water resources. By controlling the forward and reverse rotation of the rotary drum 5 and the switching of the conduction state of the three-way valve 29, the sludge treatment equipment can continuously work, the working efficiency of sludge treatment is improved, and the sludge treatment capacity is increased.

Referring to fig. 3, a second embodiment of the present invention is further improved on the basis of the first embodiment, an overflow chamber 41 is connected to the outer wall of the improved tank body 2, an overflow pipe 42 is connected to a position of the overflow chamber 41 near the bottom, a control valve 43 is installed on the overflow pipe 42, an overflow hole 44 communicating with the overflow chamber 41 is formed in the tank body 2, the overflow hole 44 is a vertically extending long hole, and an overflow baffle 45 capable of sliding up and down to adjust the blocking height of the overflow hole 44 is installed in the overflow chamber 41. In order to make the overflow baffle 45 slide up and down, a guide groove may be respectively disposed at a position on the outer wall of the tank 2 near the left and right sides of the overflow baffle 45, and the left and right sides of the overflow baffle 45 are respectively inserted into the guide grooves. The overflow baffle 45 is connected with a lifting rod 46 extending upwards, the upper end of the overflow chamber 41 is connected with a guide sleeve 47, the lifting rod 46 penetrates through the guide sleeve 47, the wall of the guide sleeve 47 is provided with a threaded hole, and a locking bolt 48 is arranged in the threaded hole. A transparent observation window 49 is arranged on the part of the tank body 2 close to the overflow chamber 41, the upper end of the lifting rod 46 is connected with an operating rod 50 extending downwards through a transition short rod, and the lower end of the operating rod 50 is flush with the upper edge of the overflow baffle 45. After the thin sludge is added with the flocculating agent and mixed, the thin sludge can be precipitated, the supernatant can enter the overflow chamber 41 through the overflow hole 44 and then is discharged outwards through the overflow pipe 42, the treatment capacity of the sludge is reduced, the working efficiency is improved, the height of the upper edge of the overflow baffle 45 can be changed by controlling the lifting rod 46 to ascend and descend, the overflow height is matched with the height of the supernatant, the lifting rod 46 can be locked after the locking bolt 48 is screwed, the working position of the overflow baffle 45 is kept unchanged, the overflow baffle 45 can completely block the overflow hole 44 to avoid the addition of the thin sludge or the overflow of the sludge in the stirring process, and the control valve 43 is closed to further avoid the occurrence of the condition of the sludge overflow. The boundary between the supernatant and the lower sediment can be observed through the transparent observation window 49, the operating rod 50 extending downwards not only lowers the operating position of the lifting overflow baffle 45, but also has the marking function, when the lower end of the operating rod 50 is flush with the boundary between the supernatant observed through the transparent observation window 49, the upper edge of the overflow baffle 45 is just positioned at the boundary, and the supernatant is completely discharged as far as possible, so that the treatment capacity of solid-liquid separation of sludge is reduced to the maximum extent.

Referring to fig. 4, the third embodiment of the present invention is further improved on the basis of the first or second embodiment, the improved outer cylinder 3 is rotatably connected to the top wall of the tank 2, the frame 1 is provided with a second driving device (not shown) for driving the outer cylinder 3 to rotate, the cylinder wall of the outer cylinder 3 is provided with a water seepage area, the water seepage area is provided with a plurality of water seepage holes 51, and the first helical blade 9 is connected with a mud scraper 52 facing the water seepage area. After the improvement, the thick sludge is not only separated from the solid by the extrusion action of the first helical blade 9, and the outer cylinder 3 can be driven by the second driving device to rotate at a speed different from that of the rotating cylinder 5, so that the moisture contained in the sludge can be leaked out through the seepage holes by the centrifugal action generated by the rotation of the outer cylinder 3, the sludge treatment speed is further improved, the sludge scraper 52 can rotate along with the rotating cylinder 5 and is used for scraping the adhered sludge in the seepage areas to avoid the blockage of the seepage holes 51.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a sludge treatment equipment, which comprises a frame (1), install the jar body (2) of vertical setting on frame (1), characterized by be equipped with upper end closure, lower extreme open-ended urceolus (3) in jar body (2), urceolus (3) are connected with jar body (2) roof, the roof that the jar body (2) was passed on the upper portion of urceolus (3) outwards stretches out and the position that outwards stretches out is equipped with row cinder notch (4), be equipped with rotatable rotating drum (5) in jar body (2), be equipped with on frame (1) and be used for ordering about rotating drum (5) pivoted first drive arrangement, the through-hole that the upper end of rotating drum (5) passed on urceolus (3) roof outwards stretches out, the lower extreme of rotating drum (5) stretches to jar body (2) bottom, rotating drum (5) including being located the major part of urceolus (3) expand (6) and with expand last barrel (7) that major part (, The novel medicine tank comprises a lower cylinder body (8), wherein a first spiral blade (9) is arranged on the outer peripheral surface of an expansion part (6), a central shaft (10) is arranged in the lower cylinder body (8), a second spiral blade (11) is arranged between the lower cylinder body (8) and the central shaft (10), the rotating directions of the first spiral blade (9) and the second spiral blade (11) are the same, a plurality of discharge holes (12) are formed in the middle of the expansion part (6), a splash guard (13) is arranged in an inner cavity of the expansion part (6), the discharge holes (12) are located below the splash guard (13), and a medicine adding opening (14), a feed inlet (15) and a water outlet (16) are formed in a tank body (2).

2. The sludge treatment apparatus as claimed in claim 1, wherein the outer tub (3) has a tapered structure with a diameter gradually increasing from top to bottom.

3. The sludge treatment equipment according to claim 1, wherein a sludge retaining ring (17) is connected to a part of the rotating cylinder (5) which is above the first helical blade (9) and close to the top wall of the outer cylinder (3), and the diameter of the sludge retaining ring (17) is larger than that of the through hole on the top wall of the outer cylinder (3).

4. The sludge treatment equipment according to claim 1, wherein the first driving device comprises a driven pulley (21) mounted at the upper end of the upper cylinder (7) and a motor (22) mounted on the frame (1), a driving pulley (23) is mounted on a power output shaft of the motor (22), and a transmission belt (24) is connected between the driving pulley (23) and the driven pulley (21).

5. The sludge treatment equipment according to claim 1, wherein a water retaining ring (25) is arranged at a position below the outer cylinder (3) in the tank body (2), a conical drainage part (26) which protrudes upwards and has a gradually reduced diameter is arranged at the middle part of the water retaining ring (25), and the upper end of the conical drainage part (26) extends to a position where the swelling part (6) is connected with the lower cylinder (8).

6. The sludge treatment equipment according to claim 5, wherein the water outlet (16) is arranged above the water retaining ring (25) and is lower than the top end of the conical drainage part (26), a first water pipe (27) is connected at the water outlet (16), a second water pipe (28) is connected on the tank body (2) below the water retaining ring (25) and close to the water retaining ring (25), a three-way valve (29) is arranged between the first water pipe (27) and the second water pipe (28), the water inlet of the three-way valve (29) is connected with the first water pipe (27), one water outlet of the three-way valve (29) is connected with the second water pipe (28), the other water outlet of the three-way valve (29) is connected with a drainage pipe (30), and the chemical feeding port (14) is arranged on the top wall of the tank body (2.

7. The sludge treatment equipment according to claim 5, wherein a rotatable movable support (31) is arranged at a position below the water retaining ring (25) in the tank body (2), the movable support (31) comprises a cross beam (32) and two drooping support arms (33) connected to two ends of the cross beam (32), a plurality of stirring teeth (34) extending to one side of the rotating barrel (5) are arranged on the two drooping support arms (33) at intervals up and down, and an overrunning clutch (35) capable of driving the movable support (31) to rotate when the rotating barrel (5) rotates reversely is arranged between the cross beam (32) and the rotating barrel (5).

8. The sludge treatment equipment according to claim 1, wherein an overflow chamber (41) is connected to the outer wall of the tank body (2), an overflow pipe (42) is connected to a position, close to the bottom, of the overflow chamber (41), a control valve (43) is installed on the overflow pipe (42), an overflow hole (44) communicated with the overflow chamber (41) is formed in the tank body (2), the overflow hole (44) is a vertically extending long hole, an overflow baffle (45) capable of sliding up and down to adjust the plugging height of the overflow hole (44) is installed in the overflow chamber (41), a lifting rod (46) extending upwards is connected to the overflow baffle (45), a guide sleeve (47) is connected to the upper end of the overflow chamber (41), the lifting rod (46) penetrates through the guide sleeve (47), a threaded hole is formed in the wall of the guide sleeve (47), and a locking bolt (48) is installed in the.

9. The sludge treatment equipment according to claim 1, wherein the tank body (2) is provided with a transparent observation window (49) at a position close to the overflow chamber (41), the upper end of the lifting rod (46) is connected with a control rod (50) extending downwards, and the lower end of the control rod (50) is flush with the upper edge of the overflow baffle (45).

10. The sludge treatment equipment according to any one of the claims 1 to 9, wherein the outer cylinder (3) is rotatably connected with the top wall of the tank body (2), the frame (1) is provided with a second driving device for driving the outer cylinder (3) to rotate, the wall of the outer cylinder (3) is provided with a water seepage area, the water seepage area is provided with a plurality of water seepage holes (51), and the first helical blade (9) is connected with a mud scraper (52) facing the water seepage area.