CN111718103A - Sludge concentration system - Google Patents

Abstract

The invention relates to a sludge concentration system, which comprises a tank body, a stirring mechanism arranged in the tank body and a buffer mechanism arranged at a feed inlet at the top of the tank body, wherein the stirring mechanism comprises a stirring rod and a stirring rod; the bottom of the tank body is provided with a mud collecting pit, and the side wall of the top of the tank body is provided with a water outlet; buffer gear includes inlet pipe, passage and two parallelly connected branch material pipes that set up between inlet pipe and passage, and the bottom of two branch material pipes sets up relatively to by the relative collision of the mud of the bottom discharge of two branch material pipes. The sludge added later can be prevented from interfering the sludge sedimentation, the sludge concentration effect is ensured, and the concentration efficiency can be ensured.

Description

Sludge concentration system

Technical Field

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

Background

The gravity concentration method is the most common method for sludge concentration, and adopts a sludge concentration tank, the structure of the sludge concentration tank is similar to that of a sedimentation tank, a tank body with the diameter of 5-20 meters is mostly adopted, a stirring machine is arranged in the tank body for slow stirring, and the retention time of sludge in the tank body is about 12 hours generally. In the jar body, the solid particle is descended by virtue of gravity, and moisture is extruded from mud, and concentrated mud is discharged from jar body bottom, and the supernatant is excessive (continuous type) or flow from jar side wall delivery port from jar body weir mouth, and under this kind of design, mud is when getting into jar internally by the feed inlet, because it can produce certain kinetic energy at the in-process of whereabouts, makes it cause the disturbance to jar internal original mud to make originally already subsided mud and sewage remix, influence concentrated effect and efficiency.

Therefore, how to provide a sludge concentration system can avoid the interference of the sludge added later on the sludge sedimentation, ensure the sludge concentration effect and simultaneously ensure the concentration efficiency, and is a technical problem to be solved by technical personnel in the field.

Disclosure of Invention

The invention aims to provide a sludge concentration system which can avoid the interference of sludge added later on sludge sedimentation, ensure the sludge concentration effect and simultaneously ensure the concentration efficiency.

In order to solve the technical problem, the invention provides a sludge concentration system which comprises a tank body, a stirring mechanism arranged in the tank body and a buffer mechanism arranged at a feed inlet at the top of the tank body; a mud collecting pit is arranged at the bottom of the tank body, and a water outlet is arranged on the side wall of the top of the tank body; buffer gear include inlet pipe, passage and two parallelly connected set up in the inlet pipe with divide the material pipe between the passage, two divide the bottom of material pipe to set up relatively, and by two divide the mud of the bottom discharge of material pipe can collide relatively.

Mud and medicament let in by the inlet pipe, and carry out preliminary mixing in the inlet pipe, then divide into two branch intraductals that connect in parallel and set up, when mud is discharged by the bottom of branch material pipe, two way mud is compiled once more and bump in order to form the convection current, make more even that medicament and mud mix, and at this in-process, two way mud will offset each other the kinetic energy that produces among the flow process and weaken, then the mud after the mixture gets into the jar internal along the passage, thereby can reduce the disturbance of the original mud of the mud of jar internal portion of back joining after furthest, reduce the influence of subsiding to mud, improve concentration efficiency.

The mud that gets into the jar internal will take place to separate under the effect of medicament and gravity, and the mud that the proportion is big subsides downwards under the effect of gravity, and the filtrate water that the proportion is little rises and the mode of accessible overflow is discharged through the outlet, and concentrated mud descends to the collection mud pit of jar body bottom and discharges to realize the concentration of mud.

Optionally, the buffer mechanism further comprises a mixing box communicated between the two material distributing pipes and the material guide pipes, the bottom ends of the material distributing pipes are communicated with the side wall of the mixing box, and an outlet communicated with the side wall of the material guide pipe is formed in the side wall of the mixing box.

Optionally, a partition plate is further arranged on the top wall of the mixing box, the partition plate can divide the mixing box into a first box body and a second box body, the first box body and the second box body are communicated below the partition plate, the first box body is communicated with the material distributing pipe, and the second box body is provided with the outlet; the lower edge of the outlet is higher than the bottom end of the partition board.

Optionally, the height of the bottom end of the material guide pipe is located in the middle of the height of the tank body.

Optionally, the mixing box and the material guiding pipe are both located in the tank body.

Optionally, an overflow groove is further formed in the top of the inner wall of the tank body along the circumferential direction, and the overflow groove is communicated with the water outlet.

Optionally, a sawtooth structure is arranged at the top end of the inner wall of the overflow groove.

Optionally, rabbling mechanism includes driving piece, (mixing) shaft, paddle and scraper blade, the driving piece can drive the (mixing) shaft rotates and drives the paddle with the scraper blade rotates, the scraper blade can with the diapire laminating of the jar body rotates to with concentrated sludge drive extremely in the mud collection pit.

Optionally, the stirring mechanism further comprises a mud discharging pipe communicated with the mud collecting pit, and the stirring mechanism further comprises a mud plate for stirring the mud collecting pit.

Optionally, the paddle comprises a frame fixed with the stirring shaft and a plurality of grid bars arranged at intervals and fixed with the frame.

Optionally, the outer wall of the tank body is further provided with a reinforcing rib.

Drawings

FIG. 1 is a schematic structural diagram of a sludge thickening system provided in an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the damper mechanism;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a side view of FIG. 2;

FIG. 5 is a schematic view of the construction of the can body;

fig. 6 is a schematic structural view of the stirring mechanism.

In the accompanying fig. 1-6, the reference numerals are illustrated as follows:

1-tank body, 11-feed inlet, 12-mud collecting pit, 13-water outlet, 14-mud discharging pipe, 15-medicament inlet and 16-conical surface structure;

2-stirring mechanism, 21-driving piece, 22-stirring shaft, 23-blade, 231-frame, 232-grid, 24-scraper, 25-mud plate, 26-pull rod;

3-a buffer mechanism, 31-a feeding pipe, 32-a material guiding pipe, 33-a material distributing pipe, 331-a bending section, 34-a mixing box, 341-an outlet, 342-a clapboard, 343-a first box body and 344-a second box body;

4-an overflow trough, 41-a sawtooth structure;

5-guard bar.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The embodiment of the invention provides a sludge concentration system, as shown in fig. 1, the sludge concentration system comprises a tank body 1, a stirring mechanism 2 and a buffering mechanism 3, wherein the stirring mechanism 2 is arranged in the tank body 1 and is used for stirring sludge in the tank body 1 to increase fluidity and avoid blockage, a feed inlet 11 is arranged at the top of the tank body 1, a water outlet 13 is arranged on the side wall of the top, a sludge collecting pit 12 for collecting concentrated sludge is arranged at the bottom of the tank body 1, and the buffering mechanism 3 is arranged at the feed inlet 11. The buffer mechanism 3 comprises a feeding pipe 31, a material guiding pipe 32 and two material distributing pipes 33, wherein the feeding pipe 31 is used for simultaneously introducing sludge and a medicament into the tank body 1, the two material distributing pipes 33 are arranged between the feeding pipe 31 and the material guiding pipe 32 in parallel, the bottom ends (pointing to one end of the material guiding pipe 32) of the two material distributing pipes 33 are oppositely arranged, and the sludge discharged from the bottom ends of the two material distributing pipes 33 can be relatively collided and mixed.

In detail, as shown by arrows in fig. 4, the sludge and the chemical are introduced from the inlet pipe 31, and are primarily mixed in the inlet pipe 31, and then enter the two parallel branch pipes 33 in a split manner, when the sludge is discharged from the bottom end of the branch pipes 33, the two paths of sludge are converged again and collide to form convective flow, so that the chemical and the sludge are mixed more uniformly, and in the process, the two paths of sludge can offset and weaken kinetic energy generated in the flowing process, and then the mixed sludge enters the tank body 1 along the guide pipe 32, so that disturbance of the added sludge to the original sludge in the tank body 1 can be reduced to the maximum extent, the influence on sludge sedimentation is reduced, and the concentration efficiency is improved.

The sludge entering the tank body 1 is separated under the action of the medicament and the gravity, the sludge with large specific gravity is settled downwards under the action of the gravity, the filtrate water with small specific gravity rises and can be discharged through the water outlet 13 in an overflow mode, and the concentrated sludge falls into the sludge collecting pit 12 at the bottom of the tank body 1 and is discharged, thereby realizing the concentration of the sludge.

In addition, in this embodiment, the arrangement of the feeding port 11 is not required, as shown in fig. 2 to 4, the sidewall of the feeding pipe 31 is provided with the chemical inlet 15, or two feeding pipes 31 may be provided for respectively introducing the sludge and the chemical, and the two feeding pipes 31 may be collected and then introduced into the two branch pipes 33 together. The bottom ends of the two material distributing pipes 33 are arranged oppositely, specifically, as shown in fig. 4, the bottom of the material distributing pipe 33 is provided with a bending section 331, the end of the bending section 331 is communicated with the material guiding pipe 32, the end of the bending section 331 of the two material distributing pipes 33 is arranged oppositely, specifically, the two material distributing pipes 33 can be arranged into a C-shaped structure, and the openings of the bottom ends are opposite, or the material distributing pipes 33 can be arranged into an L-shaped structure. In addition, in the present embodiment, the bending angle of the two bending sections 331 is about 90 ° (90 ° ± 20 °), and the specific bending angle is not limited.

In the above embodiment, as shown in fig. 1 to 4, the buffering mechanism 3 further includes a mixing box 34, the mixing box 34 is communicated between the two material distributing pipes 33 and the material guiding pipe 32, specifically, the bottom ends of the material distributing pipes 33 are communicated with the side wall of the mixing box 34 (as shown in fig. 4), and the side wall of the mixing box 34 is provided with an outlet 341 communicated with the side wall of the material guiding pipe 32, that is, when sludge enters the mixing box 34 from the bottom ends of the two material distributing pipes 33, the sludge can collide and mix in the mixing box 34 and fall to the bottom of the mixing box 34, so that the sludge can collide with the bottom wall of the mixing box 34, and then flow to the outlet 341 of the mixing box 34 and be discharged into the material guiding pipe 32 and enter the tank body 1 along the material guiding pipe 32. The mixing box 34 is arranged like a sludge transfer station for further mixing the sludge and reducing the kinetic energy thereof, thereby reducing the disturbance caused when entering the tank body 1.

Further, in this embodiment, the top wall of the mixing tank 34 is further provided with a partition 342, the partition 342 can divide the mixing tank 34 into a first tank 343 and a second tank 344, the first tank 343 and the second tank 344 are communicated below the partition 342, the first tank 343 is communicated with the distributing pipe 33, the second tank 344 is provided with the outlet 341, and the height of the lower edge of the outlet 341 is higher than the height of the bottom end of the partition 342. The sludge moves in the mixing tank 34 as shown in fig. 2, and after entering the first tank 343, the sludge falls to the bottom, flows into the second tank 344 along the lower side of the partition 342, and then overflows into the guide tube 32 through the outlet 341. The arrangement of the partition 342 and the height of the outlet 341 can further limit the flow path of the sludge in the mixing box 34, ensure that the sludge flowing through the mixing box 34 into the material guiding pipe 32 can reduce kinetic energy, and reduce the disturbance to the sludge in the tank 1.

The sludge concentration system that this embodiment provided, because mud and medicament pass through inlet pipe 31, divide a lot of homogeneous mixing of material pipe 33 and mixing box 34, be favorable to mud to subside fast in jar body 1 to mud is at the in-process that gets into jar body 1, through the reduction of many times kinetic energy, and finally gets into jar body 1 with the mode of overflow, furthest's reduction to the disturbance of the existing mud in jar body 1, can reduce the settlement time of stewing, improve concentration efficiency.

In the above embodiment, as shown in fig. 1 and 5, the height of the bottom end of the material guiding pipe 32 is located at the middle position of the height of the tank body 1, and the sludge mixed by the above buffering device can be separated at the middle position of the tank body 1 after entering the tank body 1, wherein the sludge with higher specific gravity will settle downwards, and the filtrate water with lower specific gravity will rise and overflow through the water discharging opening 13. If the length of the guide pipe 32 is long, that is, the height of the bottom end of the guide pipe is low and the guide pipe is located in the sludge settled below, the sludge entering the tank 1 along the guide pipe 32 may directly wash toward the settled sludge, and if the length of the guide pipe 32 is short, that is, the height of the bottom end of the guide pipe is high and the guide pipe is located in the supernatant, the sludge entering the tank 1 along the guide pipe 32 may be directly mixed in the supernatant and even the sludge may be discharged from the water discharge outlet 13. Specifically, the "middle position" is not a middle dimension in a strict sense, and may be specifically set according to the height, volume, and the like of the tank body 1, the bottom end height of the material guiding pipe 32 is set at about 1/2 of the height of the tank body 1, and a certain floating range may exist up and down, which is not limited specifically herein.

In the above embodiment, as shown in fig. 1, the mixing box 34 and the material guiding pipe 32 are both located in the tank body 1, however, in this embodiment, the mixing box 34 may be disposed outside the tank body 1, and the top end of the material guiding pipe 32 extends out of the tank body 1, and the mixing box 34 may be communicated with the material guiding pipe 32 from the outside, and when the mixing box 34 is disposed in the tank body 1, the overall structure may be more regular, and the volume of the overall structure may be reduced, which is convenient for arrangement.

In the above embodiment, the top of the inner wall of the can body 1 is further provided with the overflow groove 4 along the circumferential direction thereof, and as shown in fig. 1 and 5, the overflow groove 4 is communicated with the water discharge opening 13. Because the tank body 1 is large in size and large in diameter, the overflow groove 4 arranged along the circumferential direction enables supernatant in the tank body 1 to overflow from all circumferential directions and enter the overflow groove 4, and finally flows along the overflow groove 4 and is discharged from the water outlet 13, so that compared with the situation that the supernatant in the tank body 1 is directly discharged from one water outlet 13, the arrangement can avoid disturbance of the supernatant in the flowing process and drive sludge settled at the bottom to be discharged from the water outlet 13. Alternatively, in the present embodiment, a plurality of water discharge ports 13 may be provided at intervals in the circumferential direction of the tank body 1, so that the supernatant in the tank body 1 can be uniformly discharged in a plurality of directions in the circumferential direction. When the overflow groove 4 is arranged, only one water outlet 13 needs to be arranged, so that the overall structure can be further simplified and the overflow of the supernatant can be more uniform compared with the scheme that a plurality of water outlets 13 are arranged on the side wall of the tank body 1.

Further, the top end of the inner wall of the overflow groove 4 is provided with a sawtooth structure 41, wherein the inner wall of the overflow groove 4 is the side wall of the overflow groove 4 facing the center of the tank body 1, and certainly, in this embodiment, the top end of the inner wall of the overflow groove 4 can be set to be in a wave shape or a structure with the same height, when the top end of the inner side wall of the overflow groove 4 is set to be the sawtooth structure 41, the supernatant in the tank body 1 can enter the overflow groove 4 along the tooth root of the sawtooth, and the situation that the supernatant is mixed with particles such as stones and the like to enter the overflow groove 4 can be avoided, so that the overflow groove 4 is blocked.

In the above embodiment, as shown in fig. 6, the stirring mechanism 2 includes a driving part 21 (including a motor and a speed reducer), a stirring shaft 22, a blade 23, and a scraper 24, the driving part 21 can drive the stirring shaft 22 to rotate, the stirring shaft 22 can drive the blade 23 and the scraper 24 to rotate, and in the rotating process, the blade 23 can stir the sludge in the tank body 1, and the scraper 24 arranged at the bottom end can be attached to the bottom wall of the tank body 1 to rotate, and can scrape the concentrated sludge into the sludge collection pit 12. Alternatively, in this embodiment, the scraper 24 may not be provided, and the mud scraping pit may be configured to have a structure with a large inclination angle, so that the sludge is directly settled in the mud collecting pit 12 when settling to the bottom of the tank 1, and the mud collecting pit 12 may be reduced in size by scraping the concentrated sludge settled at the bottom into the mud collecting pit 12 by the scraper 24, as shown in fig. 5, the mud collecting pit 12 may be a groove structure machined from the bottom wall of the tank 1, so that the overall structure may be simplified.

And, in order to facilitate scraping the discharge of mud in the mud pit, collection mud pit 12 sets up to the toper structure that from top to bottom gradually reduces usually, if set up collection mud pit 12 great, be equivalent to set up a mud bucket in the below of jar body 1, at this moment, for guaranteeing overall structure stability, need set up the support in the below of jar body 1 to guarantee to place stably in ground. When the sludge collecting pit 12 is directly formed on the bottom wall of the tank body 1, the whole volume of the sludge concentration system can be reduced.

Specifically, the scraper 24 may be fixed to the stirring shaft 22, or may be fixed to the blade 23, and when the scraper 24 is fixed to the blade 23, the scraper 24 may be an integral structure with the blade 23 or a split structure, which is not limited herein.

Further, as shown in fig. 6, the upper end surface of the bottom wall of the tank 1 is a conical surface structure 16, the conical surface structure 16 is tapered from top to bottom, the bottom end of the conical surface structure 16 is connected to the top end of the sludge collection pit 12, correspondingly, the scraper 24 is arranged to be adapted to the conical surface structure 16, and the heights of the two ends are higher than the height of the middle part, so that the scraper 24 can scrape the sludge falling on the conical surface structure 16 into the sludge collection pit 12.

In the above embodiment, the sludge concentration system further includes the sludge discharge pipe 14 communicated with the sludge collection pit 12 for discharging the sludge in the sludge collection pit 12 to the outside of the tank body 1, the stirring mechanism 2 further includes the sludge plate 25 for stirring the sludge collection pit 12, and the stirring shaft 22 can drive the sludge plate 25 to rotate when rotating, so as to stir the sludge in the sludge collection pit 12, and avoid the condition that the sludge is blocked in the sludge collection pit 12.

In the above embodiment, as shown in fig. 6, the paddle 23 of the stirring mechanism 2 includes a frame 231 and a plurality of bars 232, wherein the frame 231 is fixed to the stirring shaft 22 and symmetrically arranged with respect to the stirring shaft 22, each of the bars 232 is arranged at an interval and fixed to the frame 231, and a plurality of hollowed frame structures are formed between the frame 231 and the bars 232, so that the resistance of the paddle 23 to the paddle 23 is reduced in the process of stirring the sludge by the paddle 23, thereby reducing the requirement on the driving force of the driving member 21, and because the paddle 23 is a hollowed frame structure, the disturbance to the sludge in the stirring process can be reduced, which is beneficial to improving the concentration efficiency.

In order to further improve the stability of the stirring mechanism 2, a pull rod 26 is further arranged between the stirring shaft 22 and the frame 231, so that the overall structural strength of the paddle 23 is improved.

In addition, in this embodiment, in order to ensure uniform stirring of the sludge in the tank 1, the stirring shaft 22 is disposed coaxially with the tank 1, and the material guiding pipe 32 passes through the stirring shaft 22, that is, the material guiding pipe 32 is disposed coaxially with the tank 1, so that the sludge introduced into the tank 1 from the material guiding pipe 32 can be ensured to be more uniform, and the spatial arrangement in the tank 1 can be simplified.

In the above embodiment, the outer wall of the tank body 1 is further provided with a reinforcing rib to increase the structural strength of the tank body 1, specifically, the reinforcing rib may be a hoop disposed on the outer wall of the tank body 1 or a reinforcing plate disposed on the outer wall of the tank body 1, and the like, which is not limited specifically herein.

In addition, as shown in fig. 5, the top end of the tank body 1 is further provided with a platform and a guardrail 5, the side wall of the tank body 1 is further provided with a crawling ladder, when an operator overhauls and maintains the stirring mechanism 2, the buffer mechanism 3 or the tank body 1 above the tank body 1, the operator can climb to the upper part of the platform through the crawling ladder, and the guardrail 5 can ensure the safety of the operator.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims (11)

1. The sludge concentration system is characterized by comprising a tank body (1), a stirring mechanism (2) arranged in the tank body (1) and a buffer mechanism (3) arranged at a feed inlet (11) at the top of the tank body (1);

a mud collecting pit (12) is arranged at the bottom of the tank body (1), and a water outlet (13) is arranged on the side wall of the top of the tank body (1);

buffer gear (3) include inlet pipe (31), passage (32) and two parallelly connected set up in inlet pipe (31) with divide material pipe (33) between passage (32), two divide the bottom of material pipe (33) to set up relatively, and by two divide the mud of the bottom discharge of material pipe (33) can collide relatively.

2. The sludge concentration system as claimed in claim 1, wherein the buffering mechanism (3) further comprises a mixing box (34) communicated between the two material distributing pipes (33) and the material guiding pipes (32), the bottom ends of the material distributing pipes (33) are communicated with the side walls of the mixing box (34), and the side walls of the mixing box (34) are provided with outlets (341) communicated with the side walls of the material guiding pipes (32).

3. The sludge concentration system as claimed in claim 2, wherein the top wall of the mixing tank (34) is further provided with a partition (342), the partition (342) can divide the mixing tank (34) into a first tank (343) and a second tank (344), the first tank (343) and the second tank (344) are communicated below the partition (342), the first tank (343) is communicated with the material distributing pipe (33), and the second tank (344) is provided with the outlet (341);

the height of the lower edge of the outlet (341) is higher than that of the bottom end of the clapboard (342).

4. The sludge thickening system according to claim 3, wherein the bottom end of the material guiding pipe (32) is located at a height intermediate to the height of the tank (1).

5. Sludge thickening system according to any of claims 2-4, wherein the mixing tank (34) and the guiding pipe (32) are both located inside the tank (1).

6. The sludge thickening system according to any one of claims 1 to 4, wherein the top of the inner wall of the tank (1) is further provided with an overflow launder (4) along the circumferential direction, and the overflow launder (4) is communicated with the water discharge opening (13).

7. Sludge thickening system according to claim 6, wherein the top of the inner wall of the overflow launder (4) is provided with a saw tooth structure (41).

8. The sludge concentration system according to any one of claims 1 to 4, wherein the stirring mechanism (2) comprises a driving part (21), a stirring shaft (22), a blade (23) and a scraper (24), the driving part (21) can drive the stirring shaft (22) to rotate and drive the blade (23) and the scraper (24) to rotate, and the scraper (24) can be attached to the bottom wall of the tank body (1) to rotate and drive the concentrated sludge into the sludge collecting pit (12).

9. Sludge thickening system according to claim 8, further comprising a sludge discharge pipe (14) communicating with the sludge collection pit (12), the stirring mechanism (2) further comprising a sludge plate (25) for stirring the sludge collection pit (12).

10. Sludge thickening system according to claim 8, wherein the blades (23) comprise a frame (231) fixed to the stirring shaft (22) and a plurality of grid bars (232) arranged at intervals and fixed to the frame (231).

11. Sludge thickening system according to any of claims 1-4, wherein the outer wall of the tank (1) is further provided with reinforcing ribs.

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