CN109678270B

CN109678270B - Sludge reduction treatment system and sludge treatment process method thereof

Info

Publication number: CN109678270B
Application number: CN201910127713.7A
Authority: CN
Inventors: 陆炯
Original assignee: Shenzhen Hongzhuo Environmental Protection Technology Co ltd
Current assignee: SHENZHEN HONGZHUO ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd.
Priority date: 2019-02-21
Filing date: 2019-02-21
Publication date: 2021-12-03
Anticipated expiration: 2039-02-21
Also published as: CN109678270A

Abstract

The invention discloses a sludge reduction treatment system which comprises a first cylinder, a second cylinder and a feeding pipe, wherein the first cylinder is connected with the second cylinder; the outlet end of the feeding pipe is correspondingly arranged above the first cylinder, and sewage to be treated flows into the first cylinder through the feeding pipe; a plurality of first filtering windows are arranged on the side wall of the first cylinder body, and a sludge discharge pipe is communicated with the bottom of the first cylinder body; the second cylinder is sleeved outside the first cylinder; the second cylinder and the first cylinder enclose a filter cavity with an opening at the upper end; a plurality of second filtering windows are arranged on the side wall of the second cylinder; a wastewater pond is correspondingly arranged below the second cylinder; the advantage of using two-stage filtration to sewage is that: the rapid separation of partial sludge and water can be realized in a small container through the first filtering window with the large aperture, fine filtering is completed through the filtering cavity with the large volume, the problems of easy blockage, slow treatment and easy overstocking in the traditional one-time filtering are avoided through two-stage filtering, and the working efficiency of the system is obviously improved.

Description

Sludge reduction treatment system and sludge treatment process method thereof

Technical Field

The invention relates to a sludge treatment technology, in particular to a sludge reduction treatment system and a sludge treatment process method thereof.

Background

Sludge from industrial production not only has rotten and strong pungent odor, but also contains a large amount of germs, heavy metals and carcinogenic substances. If the sludge is left to be piled up or buried directly, large nearby soil and underground water resources are easily polluted, and the environment and human health are endangered. Thermal hydrolysis, as a process for stabilizing and improving the components of sludge, is often matched with a subsequent digestion process, can effectively treat and degrade the sludge and convert the sludge into combustible gas to realize resource recycling. Some sludge is mixed in a large amount of sewage and enters a treatment system, and before the thermal hydrolysis, an important step is sludge reduction, namely a large amount of moisture in the sludge is removed, so that the reaction efficiency in the subsequent process is improved, and the workload of material transfer is reduced. Therefore, it is necessary to provide a sludge reduction treatment system which can rapidly remove water and has a high energy utilization rate.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the sludge reduction treatment system which can quickly remove moisture and has high energy utilization rate.

The technical scheme is as follows: in order to achieve the aim, the sludge reduction treatment system comprises a first cylinder, a second cylinder and a feeding pipe; the outlet end of the feeding pipe is correspondingly arranged above the first cylinder, and sewage to be treated flows into the first cylinder through the feeding pipe; a plurality of first filtering windows are arranged on the side wall of the first cylinder body, and a sludge discharge pipe is communicated with the bottom of the first cylinder body; the second cylinder is sleeved outside the first cylinder; the second cylinder and the first cylinder enclose a filter cavity with an opening at the upper end; a plurality of second filtering windows are arranged on the side wall of the second cylinder; the aperture of the second filter window is smaller than that of the first filter window; a wastewater pond is correspondingly arranged below the second cylinder; a partition plate is arranged in the first cylinder; the partition plate divides the space in the first cylinder into an upper part and a lower part; a plurality of circulation holes are formed in the partition plate along the thickness direction; and a sedimentation tank is arranged at the upper end of the circulation hole and extends outwards to the periphery.

Further, the partition plate comprises an annular ring and a mud gathering plate; the outer side of the annular ring is fixedly connected with the inner wall of the first cylinder; the mud gathering plate is arranged inside the annular ring; the circulating holes are symmetrically distributed on the mud collecting plate relative to the connecting rod; the upper end of the mud gathering plate is connected with a connecting rod; one end of the connecting rod, which is far away from the partition plate, is provided with a rotating motor in a matching way; the upper surface of the mud gathering plate is lower than the annular ring, and the junction of the mud gathering plate and the annular ring is in round angle transition.

Further, a filter pressing device is arranged above the filter cavity in a matched mode; the filter pressing device comprises a sleeve, a pressing ring and a telescopic rod; the compression ring is in nested fit with the filter cavity; the lower end of the telescopic rod is connected with the compression ring and drives the compression ring to reciprocate in the vertical direction; the compression ring and the filter cavity are arranged in a nested and matched manner; the sleeve is arranged in the pressing ring; the upper end of the compression ring is provided with a driving wheel; the driving wheel is pressed on the outer surface of the sleeve, and the driving sleeve reciprocates along the setting direction; the inner surface of the sleeve is attached to the outer surface of the first cylinder body, and the first filter window is closed.

Furthermore, a first stopper and a second stopper are oppositely and telescopically arranged on two sides of the second cylinder; the first blocking piece and the second blocking piece are attached to the outer surface of the second cylinder in an extending state and surround the second cylinder; a closed ring is connected between the bottoms of the first cylinder and the second cylinder; the rotating motor drives the connecting rod to rotate to drive the first cylinder and the second cylinder to synchronously rotate; an electric heating plate is arranged in the closed ring.

Further, the first blocking piece and the second blocking piece are symmetrically arranged relative to the second cylinder body and have the same structure; the first blocking piece and the second blocking piece respectively comprise a plurality of blocking piece units; the blocking units are mutually overlapped along the height direction of the second cylinder; each stopper unit is individually retractable.

Furthermore, the first cylinder is of a gyro-shaped structure with the lower end contracted, and the lowest point of the first cylinder is connected with the inlet end of the sludge discharge pipe; an electromagnetic vibrator is arranged on the outer side of the inlet end of the sludge discharge pipe; one end of the sludge discharge pipe, which is far away from the first cylinder, is connected with a buffer device; the outlet end of the buffer device is connected with a thermal hydrolysis reactor; the buffer device comprises an outer cavity and a multi-stage feeding pipe; the multistage feeding pipe is arranged in the outer cavity; the multi-stage feeding pipe comprises a plurality of feeding sub-pipes; the feeding sub-pipes are arranged along the vertical direction, and the adjacent feeding sub-pipes are communicated with each other; the uppermost feeding sub-pipe is communicated with the outlet end of the sludge discharge pipe; the outlet end of the feeding sub-pipe is connected with the feeding hole of the thermal hydrolysis reactor through a transfer pipe; a valve is arranged at the communication position of the adjacent feeding sub-pipes; and a piston piece is arranged on one side of the feeding sub-pipe, which is far away from the outlet end.

Further, the thermal hydrolysis reactor comprises a first reactor and a second reactor; the gas inlet of the first reactor is communicated with the gas outlet of the steam boiler; the gas outlet of the first reactor is communicated with the gas inlet of the second reactor; the air outlet of the second reactor is communicated with the air inlet of the outer cavity; a hollow anti-freezing shell is coated on the periphery of the feeding pipe; the air outlet of the outer cavity is communicated with the air inlet of the anti-freezing shell; one end of the anti-freezing shell, which is far away from the air inlet, is communicated with the exhaust pipeline.

A sludge treatment process method of a sludge reduction treatment system comprises the following steps: comprises the following steps of (a) carrying out,

firstly, continuously conveying sewage into a first cylinder through a feeding pipe, and enabling the sewage to flow into a filtering cavity through a first filtering window; meanwhile, the sludge in the sewage is partially deposited at the bottom of the first cylinder, and then slides into the deposition tank and passes through the circulation hole to reach the position below the partition plate; starting a corresponding delivery pump on the sludge discharge pipe, and pumping the sludge deposited at the bottom of the first cylinder into the buffer device;

step two, the filtering cavity receives the sewage from the first cylinder body and discharges water outwards through the second filtering window at the same time, and the water storage speed of the filtering cavity is greater than the water discharge speed; when the sewage in the filtering cavity is full, the control valve of the feeding pipe is closed, the locking device is released, and the driving wheel is operated to push the sleeve downwards so as to seal the side wall of the first cylinder; driving the blocking units at two sides of the filter cavity to extend out to seal the side wall at the lower end of the second cylinder; the number of the adjusted blocking elements is determined according to the content of sediments in the sewage, and when the sewage source is changed, the adjustment is needed again;

thirdly, the compression ring is driven to move downwards through the telescopic rod, pressure is applied to the sewage in the filtering cavity, and the sewage is accelerated to pass through the second filtering window; when the pressure ring moves to be close to the upper end of the deposited sludge layer, stopping, and conveying sludge at the bottom of the filter cavity into a sludge discharge pipe by adopting a material suction pipeline; then, the sleeve is lifted upwards to a locking height through a driving wheel, the locking device is driven to fix the position of the sleeve, and then the compression ring is driven to move upwards to an initial position through a telescopic rod to complete a filter pressing process;

fourthly, the driving stopping piece unit retracts, a control valve of the feeding pipe is opened, and after the sewage enters the filtering cavity again, the rotating motor is operated to drive the first cylinder and the second cylinder to rotate, so that the first filtering window and the second filtering window are cleaned; then, the operation is repeated from the step to the step, and the periodic sludge reduction treatment is performed.

Has the advantages that: the invention relates to a sludge reduction treatment system which comprises a first cylinder, a second cylinder and a feeding pipe, wherein the first cylinder is connected with the second cylinder; the outlet end of the feeding pipe is correspondingly arranged above the first cylinder, and sewage to be treated flows into the first cylinder through the feeding pipe; a plurality of first filtering windows are arranged on the side wall of the first cylinder body, and a sludge discharge pipe is communicated with the bottom of the first cylinder body; the second cylinder is sleeved outside the first cylinder; the second cylinder and the first cylinder enclose a filter cavity with an opening at the upper end; a plurality of second filtering windows are arranged on the side wall of the second cylinder; a wastewater pond is correspondingly arranged below the second cylinder; the advantage of using two-stage filtration to sewage is that: the rapid separation of partial sludge and water can be realized in a small container through the first filtering window with the large aperture, fine filtering is completed through the filtering cavity with the large volume, the problems of easy blockage, slow treatment and easy overstocking in the traditional one-time filtering are avoided through two-stage filtering, and the working efficiency of the system is obviously improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a reduction processing system;

FIG. 2 is a detailed view of the structure of the first cylinder and the second cylinder;

FIG. 3 is a schematic view of the internal structure of the first cylinder;

FIG. 4 is a schematic structural diagram of the bottom of the first cylinder and the second cylinder;

FIG. 5 is a schematic view of the positions of the first and second stoppers;

FIG. 6 is a schematic view of a buffer structure;

FIG. 7 is a schematic view of the feed pipe and the anti-freeze case;

FIG. 8 is a schematic view of the internal structure of the anti-freeze casing;

FIG. 9 is a schematic diagram of a steam cycle process.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

A sludge reduction treatment system is shown in figure 1 and comprises a first cylinder 1, a second cylinder 2 and a feeding pipe 3; the outlet end of the feeding pipe 3 is correspondingly arranged above the first cylinder 1, sewage to be treated flows into the first cylinder 1 through the feeding pipe 3, and the sewage refers to a mixture of sludge and water with high water content before reduction treatment; a plurality of first filtering windows 12 are arranged on the side wall of the first cylinder 1, and a sludge discharge pipe 11 is communicated with the bottom of the first filtering windows; after sewage enters the first cylinder 1, sludge is downwards deposited under the action of gravity and is sucked away by the sludge discharge pipe 11, and water in the sewage passes through the first filter window 12 under the action of static pressure and reaches the outside of the first cylinder 1 after being filtered; the second cylinder 2 is sleeved outside the first cylinder 1; the second cylinder 2 and the first cylinder 1 enclose a filter cavity 4 with an opening at the upper end; a plurality of second filtering windows 21 are arranged on the side wall of the second cylinder 2; the aperture of the second filter window 21 is smaller than that of the first filter window 12; a wastewater pond is correspondingly arranged below the second cylinder 2; the water flowing out of the first cylinder 1 is gathered in the filter cavity 4, then continuously passes through the second filter window 21 under the action of static pressure, and falls into a wastewater pool after further filtration is finished, so that the separation from the sludge is realized, and the reduction of the sludge is finished; the bottom of the filter chamber 4 is provided with a material suction pipeline which can convey pollutants deposited in the chamber into the material inlet pipe 3 to complete the convergence of two-stage filter products, and the material suction pipeline can be built by adopting the conventional pipeline and the conventional conveying pump and is not embodied in the figure; in addition, field constructors can also adopt an embedded reciprocating pushing mechanism to discharge sludge at the bottom of the filter cavity 4 from the lower end of the side wall of the first cavity 2, and the technical scheme has the advantages of reducing sludge residue in the filter cavity 4, reducing the cleaning frequency of equipment and further saving the maintenance cost; the converged deposited sludge is finally conveyed to thermal hydrolysis equipment by a sludge discharge pipe 11, and then is subjected to digestion treatment and finally converted into combustible gas to realize resource recycling; the advantage of using two-stage filtration to sewage is that: the rapid separation of partial sludge and water can be realized in a smaller container through the first filtering window 12 with larger aperture, and then the fine filtering is completed through the filtering cavity 4 with larger volume, so that the problems of easy blockage, slow treatment and easy overstocking in the traditional one-time filtering are avoided through two-stage filtering, and the working efficiency of the system is obviously improved; a partition plate 13 is arranged in the first cylinder 1; the partition plate 13 divides the space in the first cylinder 1 into an upper part and a lower part; a plurality of circulation holes 101 are formed in the partition plate 13 along the thickness direction; after sewage enters the first barrel 1, settled sludge can pass through the circulation holes 101 to enter a space below the partition plate 13, and subsequent sewage is blocked by the partition plate 13 when being filled, so that the condition that sediments turn upwards under the impact of water flow cannot occur, and the stable separation of the sludge is ensured; as shown in fig. 3, the upper end of the circulation hole 101 is provided with a sedimentation tank 102 extending outward to the periphery, which not only ensures that the sludge on the partition plate 13 can be fully gathered into the circulation hole 101, but also ensures that the opening of the circulation hole 101 is not too large, thereby ensuring the function of blocking the impact of water flow; in practical engineering application, a vibrator can be selectively arranged below the partition plate 13 according to the actual flowing performance of sludge to promote the sediment to smoothly pass through the circulation hole 101, the sludge deposition speed in the first cylinder 1 can be increased by properly increasing the opening of the circulation hole 101, and meanwhile, a blocking net is additionally arranged in the opening to block the downward water flow, so that the sludge deposited below the partition plate 13 is still not influenced by the water flow impact caused by the falling of subsequent sewage.

As shown in fig. 1 and 2, the partition 13 includes an annular ring 104 and a mud collecting plate 105; the outer side of the annular ring 104 is fixedly connected with the inner wall of the first cylinder 1; the mud collection plate 105 is arranged inside the annular ring 104; the flow holes 101 are symmetrically distributed on the mud collecting plate 105 about the connecting rod 103; the upper surface of the mud gathering plate 105 is lower than the annular ring 104, and the junction of the mud gathering plate and the annular ring is in round angle transition; the outlet end of the feeding pipe 3 corresponds to the part of the annular ring 104 in the vertical direction, and sewage firstly collides with the annular ring 104 after falling and then flows to the mud collecting plate 105 part; the upper end of the mud collecting plate 105 is connected with a connecting rod 103; one end of the connecting rod 103 far away from the partition plate 13 is provided with a rotating motor 106 in a matching way; through the rotation of the first cavity 1 of rotating electrical machine 106 drive, can make the sedimentation process of mud more even smooth and easy in the rotation, can not take place the overstock condition of blockking up in flow hole 101 department, the relative rotation of sewage production in first filter window 12 and the first barrel 1 simultaneously can wash out the remaining partial mud in the filtration pore, is showing to alleviate the jam condition, has reduced the equipment maintenance frequency, has promoted production efficiency.

As shown in the attached figure 1, a filter pressing device 5 is arranged above the filter cavity 4 in a matching way; the filter pressing device 5 comprises a sleeve 51, a pressing ring 52 and an expansion rod 53; the pressing ring 52 is in nested fit with the filter cavity 4; the lower end of the telescopic rod 53 is connected with the pressing ring 52 and drives the pressing ring to reciprocate in the vertical direction; the pressing ring 52 is arranged in a nested and matched manner with the filter cavity 4; the sleeve 51 is arranged in the pressing ring 52; the upper end of the compression ring 52 is provided with a driving wheel 502; the driving wheel 502 is pressed on the outer surface of the sleeve 51, and the driving sleeve 51 reciprocates along the setting direction; the compression ring 52 is also provided with a locking device 505 which can adopt a telescopic structure and is matched with a positioning groove on the surface of the sleeve 51, so that the sleeve 51 is ensured not to fall down spontaneously due to relative sliding between the sleeve 51 and the driving wheel 502, and the running reliability of the mechanism is ensured; the inner surface of the sleeve 51 is attached to the outer surface of the first cylinder 1 to seal the first filter window 12; the filter pressing device 5 has the function of improving the secondary filtering efficiency by extruding the sewage in the filtering cavity 4, so that the working efficiency of the whole system is improved; the sleeve 51 is used for blocking the first filter window 12 on the side wall of the first cylinder 1, preventing sewage from flowing backwards and ensuring that the filter chamber 4 is kept in a closed state in the process of applying pressure.

As shown in fig. 4 and 5, a first stopper 22 and a second stopper 23 are relatively arranged on two sides of the second cylinder 2 in a telescopic manner; the first stopper 22 and the second stopper 23 are attached to the outer surface of the second cylinder 2 in an extended state and surround the outer surface; the second filter window 21 at the lower end of the first cylinder 2 can be blocked by the blocking piece, so that the sediment is prevented from being extruded out of the filter cavity 4 when the filter pressing device 5 works; a closed ring 24 is connected between the bottoms of the first cylinder 1 and the second cylinder 2; the rotating motor 106 drives the connecting rod 103 to rotate, so as to drive the first cylinder 1 and the second cylinder 2 to synchronously rotate, partial blockage can be cleaned by means of the relative rotation of the sewage of the first filtering window 21, and meanwhile, the sediment at the bottom of the filtering cavity 4 can be uniformly distributed, so that pumping and discharging are facilitated; an electric heating plate 107 is arranged in the closed ring 24, so that sewage in the filter cavity 4 can be properly heated in cold weather, ice accumulated in the filter cavity under a shutdown state is removed, and normal operation of the system is ensured.

The first stopper 22 and the second stopper 23 are symmetrically arranged about the second cylinder 2, and have the same structure; the first stopper 22 and the second stopper 23 respectively comprise a plurality of stopper units 201; a plurality of the blocking units 201 are mutually overlapped along the height direction of the second cylinder 2; each stopper unit 201 can independently perform a telescopic action; therefore, the second cylinder 2 can be accurately enclosed by using different numbers of blocking units 201 according to the height of sediment in the filter chamber 4 in the system operation, and the sewage separation efficiency is improved.

As shown in fig. 4, the first cylinder 1 is of a top-shaped structure with a contracted lower end, so that sludge can be deposited and gathered at the bottom, and the lowest point of the first cylinder is connected with the inlet end of a sludge discharge pipe 11; an electromagnetic vibrator 108 is arranged on the outer side of the inlet end of the sludge discharge pipe 11, so that the sludge gathering speed can be further increased, and the phenomenon of adhesion of sludge and the side wall is prevented; one end of the sludge discharge pipe 11, which is far away from the first cylinder 1, is connected with a buffer device 6; the outlet end of the buffer device 6 is connected with a thermal hydrolysis reactor 7; as shown in fig. 6, the buffer device 6 comprises an outer cavity 61 and a multi-stage feeding pipe 62; the multi-stage feed pipe 62 is arranged in the outer cavity 61; the multi-stage feeding pipe 62 comprises a plurality of feeding sub-pipes 601; the feeding sub-pipes 601 are arranged along the vertical direction, and the adjacent feeding sub-pipes 601 are communicated with each other; the uppermost feeding sub-pipe 601 is communicated with the outlet end of the sludge discharge pipe 11; the outlet end of the feeding sub-pipe 601 is connected with the feeding hole of the thermal hydrolysis reactor 7 through an adapter pipe 602; as shown by the dotted line in the figure, after the sludge is filled into the multi-stage feeding pipes 62, the sludge firstly moves downwards to fill the bottommost feeding sub-pipe 601; the effect of accumulating the sludge conveyed by upstream equipment is taken into consideration by the plurality of feeding sub-pipes 601, and meanwhile, the stable batch feeding of the thermal hydrolysis reactor 7 can be realized, so that the complicated process of sludge flow detection in the traditional dynamic continuous conveying process is omitted, and the simplified management of the system is facilitated; a piston piece 604 is arranged on one side of the feeding sub-pipe 601 far away from the outlet end, and the piston piece 604 is matched with a pumping pump arranged on the adapter pipe 602 to extrude and convey sludge in the pipe into the thermal hydrolysis reactor 7; the connecting part of the adjacent feeding sub-pipes 601 is provided with a valve 603, when one feeding sub-pipe 601 is filled up, the valves 603 on the two sides are closed to ensure that the sludge overflow and internal irrigation phenomena can not occur in the whole feeding process, and the feeding amount is ensured to be accurate; arrows on the left side and the right side in the figure indicate steam entering and exiting the outer cavity 61, and the steam can preheat sludge, so that the time spent by a subsequent thermal hydrolysis process is shortened, and the working efficiency of the system is improved.

As shown in fig. 9, the thermal hydrolysis reactor 7 includes a first reactor 71 and a second reactor 72; the gas inlet of the first reactor 71 is communicated with the gas outlet of the steam boiler 8; the air outlet of the first reactor 71 is communicated with the air inlet of the second reactor 72; the air outlet of the second reactor 72 is communicated with the air inlet of the outer cavity 61; as shown in fig. 7, a hollow anti-freezing shell 301 is coated on the periphery of the feeding pipe 3, so that the feeding pipe 3 can be insulated at a low ambient temperature, the fluidity of internal sewage is ensured, and freezing is prevented; the air outlet of the outer cavity 61 is communicated with the air inlet of the anti-freezing shell 301; one end of the anti-freezing shell 301, which is far away from the air inlet, is communicated with an exhaust pipeline; thus, the multi-stage utilization of the steam is realized, the overall energy consumption of the system is obviously reduced, the production cost is saved, and the pollution generated by the combustion of the steam boiler 8 is also reduced.

As shown in fig. 7 and 8, the anti-freezing shell 301 comprises a plurality of heat preservation sections, and adjacent heat preservation sections are connected with each other through a gas transmission pipeline; the thermal insulation joint comprises a heat conduction cylinder 302, an air passage partition plate 303, a heat insulation cylinder 304 and a sealing ring 305; the heat-conducting cylinder 302, the heat-insulating cylinder 304 and the sealing ring 305 jointly enclose a heat-insulating cavity 308; the heat conducting cylinder 302 is made of a material with good heat conducting performance and is attached to the outer wall of the feeding pipe 3; the heat insulation cylinder 304 is made of heat insulation materials, such as a plastic splint filled with foam, and can prevent steam heat loss; the air flue partition plates 303 are circumferentially distributed between the heat conducting cylinder 302 and the heat insulation cylinder 304; the sealing rings 305 are divided into two parts and distributed on two sides of the heat preservation section along the length direction of the heat preservation section; one end of the air passage partition plate 303 is connected with the sealing ring 305 on one side, the other end of the air passage partition plate is arranged at an interval with the sealing ring 305 on the other side, and the sealing ring 305 connected with the adjacent air passage partition plate 303 is positioned on the opposite side; the air duct partition plates 303 divide the heat-insulating cavity 308 into continuous S-shaped surrounding air flow passages, and the air inlet and the air outlet of the anti-freezing shell 301 are arranged on two sides of one air duct partition plate 303, so that steam can be discharged after surrounding a circle, the retention time of the steam can be fully increased, and the heat utilization efficiency is remarkably improved.

firstly, continuously conveying sewage into a first barrel 1 through a feeding pipe 3, and enabling the sewage to flow into a filter cavity 4 through a first filter window 12; at the same time, the sludge in the sewage is partially deposited at the bottom of the first cylinder 1, and then slides into the sedimentation tank 102 and passes through the circulation hole 101 to reach the position below the partition plate 13; starting a corresponding delivery pump on the sludge discharge pipe 11, and pumping sludge deposited at the bottom of the first cylinder 1 into the buffer device 6;

step two, the filtering cavity 4 receives the sewage from the first cylinder 1 and discharges the water outwards through the second filtering window 21 at the same time, and the water storage speed is higher than the water discharge speed; when the sewage in the filter chamber 4 is full, the control valve of the feeding pipe 3 is closed, the locking device 505 is released, and the driving wheel 502 is operated to push the sleeve 51 downwards so as to seal the side wall of the first cylinder 1; the blocking units 201 at two sides of the filter cavity 4 are driven to extend out to seal the side wall at the lower end of the second cylinder 2; the number of the shifted blocking units 201 is determined according to the content of sediments in the sewage, and when the sewage source is changed, the adjustment is needed again;

thirdly, the compression ring 52 is driven to move downwards through the expansion link 53, pressure is applied to the sewage in the filtering cavity 4, and the sewage is accelerated to pass through the second filtering window 21; when the compression ring 52 moves to be close to the upper end of the deposited sludge layer, the compression ring stops moving, and sludge at the bottom of the filter cavity 4 is conveyed into the sludge discharge pipe 11 by adopting a material suction pipeline; then the sleeve 51 is lifted upwards to a locking height through the driving wheel 502, the locking device 505 is driven to fix the position of the sleeve 51, and then the compression ring 52 is driven to move upwards to an initial position through the telescopic rod 53, so that a filter pressing process is completed;

step four, the driving stopping unit 201 retracts, the control valve of the feeding pipe 3 is opened, after the sewage enters the filter chamber 4 again, the rotating motor 106 is operated to drive the first cylinder 1 and the second cylinder 2 to rotate, and the first filter window 12 and the second filter window 21 are cleaned; then, the operation is repeated from the step to the step, and the periodic sludge reduction treatment is performed.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. A sludge reduction treatment system is characterized in that: comprises a first cylinder (1), a second cylinder (2) and a feeding pipe (3); the outlet end of the feeding pipe (3) is correspondingly arranged above the first cylinder (1), and sewage to be treated flows into the first cylinder (1) through the feeding pipe (3); a plurality of first filtering windows (12) are arranged on the side wall of the first cylinder (1), and a sludge discharge pipe (11) is communicated with the bottom of the first filtering windows; the second cylinder (2) is sleeved on the outer side of the first cylinder (1); the second cylinder (2) and the first cylinder (1) enclose a filter cavity (4) with an opening at the upper end; a plurality of second filtering windows (21) are arranged on the side wall of the second cylinder (2); the pore diameter of the second filter window (21) is smaller than that of the first filter window (12); a wastewater pond is correspondingly arranged below the second cylinder (2); a partition plate (13) is arranged in the first cylinder (1); the partition plate (13) divides the space in the first cylinder (1) into an upper part and a lower part; a plurality of circulation holes (101) are formed in the partition plate (13) along the thickness direction; a sedimentation tank (102) is arranged at the upper end of the circulation hole (101) and extends outwards to the periphery;

a filter pressing device (5) is arranged above the filter cavity (4) in a matching way; the filter pressing device (5) comprises a sleeve (51), a pressing ring (52) and an expansion rod (53); the compression ring (52) is in nested fit with the filter cavity (4); the lower end of the telescopic rod (53) is connected with the pressing ring (52) and drives the pressing ring to reciprocate in the vertical direction; the compression ring (52) is nested and matched with the filter cavity (4); the sleeve (51) is arranged in the pressure ring (52); the upper end of the compression ring (52) is provided with a driving wheel (502); the driving wheel (502) is pressed on the outer surface of the sleeve (51), and the driving sleeve (51) reciprocates along the setting direction; the inner surface of the sleeve (51) is attached to the outer surface of the first cylinder (1) to seal the first filter window (12).

2. The sludge reduction treatment system according to claim 1, wherein: the baffle (13) comprises an annular ring (104) and a mud collection plate (105); the outer side of the annular ring (104) is fixedly connected with the inner wall of the first cylinder (1); the mud collection plate (105) is arranged inside the annular ring (104); the circulation holes (101) are symmetrically distributed on the mud collecting plate (105) relative to the connecting rod (103); the upper end of the mud gathering plate (105) is connected with a connecting rod (103); one end of the connecting rod (103) far away from the partition plate (13) is provided with a rotating motor (106) in a matching way; the upper surface of the mud gathering plate (105) is lower than the annular ring (104), and the junction of the mud gathering plate and the annular ring is in round-angle transition.

3. The sludge reduction treatment system according to claim 2, wherein: a first stopper (22) and a second stopper (23) are oppositely and telescopically arranged on two sides of the second cylinder (2); the first stopper (22) and the second stopper (23) are attached to the outer surface of the second cylinder (2) in an extending state and surround the outer surface; a closed ring (24) is connected between the bottoms of the first cylinder (1) and the second cylinder (2); the rotating motor (106) drives the connecting rod (103) to rotate, and drives the first cylinder (1) and the second cylinder (2) to synchronously rotate; an electric heating plate (107) is arranged in the closed ring (24).

4. The sludge reduction treatment system according to claim 3, wherein: the first stopper (22) and the second stopper (23) are symmetrically arranged relative to the second cylinder (2) and have the same structure; the first stopper (22) and the second stopper (23) respectively comprise a plurality of stopper units (201); a plurality of blocking units (201) are mutually overlapped along the height direction of the second cylinder (2); each stopper unit (201) can individually perform a telescopic action.

5. The sludge reduction treatment system according to claim 1, wherein: the first cylinder (1) is of a gyro-shaped structure with the lower end contracted, and the lowest point of the first cylinder is connected with the inlet end of the sludge discharge pipe (11); an electromagnetic vibrator (108) is arranged on the outer side of the inlet end of the sludge discharge pipe (11); one end of the sludge discharge pipe (11) far away from the first cylinder body (1) is connected with a buffer device (6); the outlet end of the buffer device (6) is connected with a thermal hydrolysis reactor (7); the buffer device (6) comprises an outer cavity (61) and a multi-stage feeding pipe (62); the multi-stage feeding pipe (62) is arranged in the outer cavity (61); the multi-stage feeding pipe (62) comprises a plurality of feeding sub-pipes (601); the feeding sub-pipes (601) are arranged along the vertical direction, and the adjacent feeding sub-pipes (601) are communicated with each other; the uppermost feeding sub-pipe (601) is communicated with the outlet end of the sludge discharge pipe (11); the outlet end of the feeding sub-pipe (601) is connected with the feeding hole of the thermal hydrolysis reactor (7) through an adapter pipe (602); a valve (603) is arranged at the communication position of the adjacent feeding sub-pipes (601); and a piston piece (604) is arranged on one side of the feeding sub-pipe (601) far away from the outlet end.

6. The sludge reduction treatment system according to claim 5, wherein: the thermal hydrolysis reactor (7) comprises a first reactor (71) and a second reactor (72); the gas inlet of the first reactor (71) is communicated with the gas outlet of the steam boiler; the gas outlet of the first reactor (71) is communicated with the gas inlet of the second reactor (72); the air outlet of the second reactor (72) is communicated with the air inlet of the outer cavity (61); the periphery of the feeding pipe (3) is coated with a hollow anti-freezing shell (301); the air outlet of the outer cavity (61) is communicated with the air inlet of the anti-freezing shell (301); one end, far away from the air inlet, of the anti-freezing shell (301) is communicated with an exhaust pipeline.

7. A sludge treatment process method of a sludge reduction treatment system comprises the following steps: comprises the following steps of (a) carrying out,

firstly, continuously conveying sewage into a first cylinder (1) through a feeding pipe (3), and enabling the sewage to flow into a filter cavity (4) through a first filter window (12); meanwhile, the sludge in the sewage is partially deposited at the bottom of the first cylinder (1), and then slides into the deposition tank (102) and passes through the circulating hole (101) to reach the position below the partition plate (13); starting a corresponding delivery pump on the sludge discharge pipe (11), and pumping the sludge deposited at the bottom of the first cylinder (1) into the buffer device (6);

step two, the filtering cavity (4) receives the sewage from the first cylinder body (1) and discharges the water outwards through the second filtering window (21) at the same time, and the water storage speed of the filtering cavity is higher than the water discharge speed; when the sewage in the filter chamber (4) is full, the control valve of the feeding pipe (3) is closed, the locking device (505) is released, and the driving wheel (502) is operated to push the sleeve (51) downwards so as to seal the side wall of the first barrel (1); driving the blocking units (201) at two sides of the filter cavity (4) to extend out to seal the side wall at the lower end of the second cylinder (2); the number of the adjusted blocking units (201) is determined according to the content of sediments in the sewage, and when the sewage source is changed, the adjustment is needed again;

thirdly, the compression ring (52) is driven to move downwards through the expansion link (53), and pressure is applied to the sewage in the filtering cavity (4) to accelerate the sewage to pass through the second filtering window (21); when the compression ring (52) moves to be close to the upper end of the deposited sludge layer, stopping, and conveying sludge at the bottom of the filter cavity (4) into the sludge discharge pipe (11) by adopting a material suction pipeline; then the sleeve (51) is lifted upwards to a locking height through a driving wheel (502), a locking device (505) is driven to fix the position of the sleeve (51), and then a compression ring (52) is driven to move upwards to an initial position through a telescopic rod (53), so that a filter pressing process is completed;

fourthly, the driving stopping unit (201) retracts, a control valve of the feeding pipe (3) is opened, and after the sewage enters the filter chamber (4) again, the rotating motor (106) is operated to drive the first cylinder (1) and the second cylinder (2) to rotate, so that the first filter window (12) and the second filter window (21) are cleaned; then, the operation is repeated from the step to the step, and the periodic sludge reduction treatment is performed.