CN115289481A

CN115289481A - Sludge distributor

Info

Publication number: CN115289481A
Application number: CN202210916697.1A
Authority: CN
Inventors: 周念列; 卢义程; 罗均; 李红军
Original assignee: Suez Water Treatment Co Ltd
Current assignee: Suez Environmental Technology Beijing Co Ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-11-04

Abstract

The invention relates to a sludge distributor, comprising: an installation part fixedly connected to the sludge pipeline; a rotating part rotatably connected to the mounting part, an interior of the rotating part being in fluid communication with the sludge conduit; and a driving motor drivingly connected to the rotating portion to drive the rotating portion to rotate; the sludge distributor further comprises a plurality of dividing blades, the upper end of each dividing blade is connected to the rotating part and is circumferentially spaced around the rotating part, the lower end of each dividing blade is connected to the end part and is circumferentially spaced around the end part, the space surrounded by the end part and the plurality of dividing blades is communicated with the inside of the rotating part in a fluid mode, a plurality of outlets for discharging sludge are formed in gaps among the plurality of dividing blades, the rotating part is driven by the driving motor to rotate around the rotating axis, and therefore the plurality of dividing blades and the end part are driven to rotate together to throw out the sludge outwards through the plurality of outlets. The sludge distribution head adopts a flange connection mode, and the distribution head in other modes can be quickly detached or replaced.

Description

Sludge distributor

Technical Field

The invention relates to the technical field of sludge incineration, in particular to the technical field of sludge and garbage collaborative incineration. More particularly, the present invention relates to a sludge distributor that subdivides and uniformly throws sludge.

Background

In recent years, with the development of sludge dewatering or drying technology and the construction of waste incineration plants, sludge and waste mixed combustion has become an effective way for sludge treatment in both technical and policy aspects.

The development of the waste incineration, which is a mainstream technology of waste treatment, is mature and reliable up to now. The waste incineration plant can provide energy required by sludge dehydration or drying, waste water, waste gas, waste residues and other wastes generated by sludge dehydration or drying treatment and incineration can be treated together with waste incineration products, and the sludge and the waste have the advantage of innate cooperative treatment. Therefore, the sludge and garbage collaborative incineration treatment is a reasonable sludge treatment way, and not only can the sludge and garbage be reduced to the greatest extent, but also the sludge and garbage can be recycled to a certain extent.

The waste incineration treatment is a mature technology, but after sludge enters an incinerator, if the sludge is not well mixed with waste, slag bonding is easily caused, the sludge is not easily burnt, and the odor is very strong. How to effectively mix the sludge into the furnace and realize the mixing with the garbage is a key and technical difficulty for successfully mixing and burning the sludge in the garbage burning.

In the prior art, after sludge is dehydrated or dried, the sludge is directly conveyed to a feed hopper of an incinerator by a positive displacement pump and a pipeline. However, even if the branch pipes are used for multi-point feeding, since the sludge is non-Newtonian fluid, the flow distribution of the dewatered or dried sludge is difficult to control, and the sludge is generally agglomerated and piled during the sludge feeding, the sludge is difficult to be uniformly mixed with garbage, and a valve of a sludge feeding pipeline needs to be adjusted frequently so as to ensure the sludge discharge of each branch pipe. The problems of over-fire, partial material and non-burnout can be caused when the sludge which is distributed unevenly enters the hearth. Therefore, when sludge is added to a garbage blanking point, the sludge is broken up and subdivided, and the sludge and the garbage are uniformly mixed, so that the purposes of cooperatively and stably combusting the sludge and the garbage and improving the blending combustion proportion of the sludge added to the garbage are achieved.

Disclosure of Invention

The invention realizes the synergistic incineration and uniform distribution of the dewatered or dried sludge and the garbage and improves the mixed incineration ratio of the sludge.

The sludge distributor disclosed by the invention utilizes the variable frequency motor to drive the rotary distribution device, realizes the chopping and subdivision of sludge under the extrusion of the positive displacement pump, and enables the sludge to be uniformly distributed in garbage along gaps among blades formed on the periphery of the conical end part under the action of rotary centrifugal force, so that the problems of uneven mixing and difficult thorough burning of the sludge and the garbage are solved.

The sludge distributor according to the present invention comprises: a mounting portion fixedly connected to the sludge pipe; a rotating part rotatably connected to the mounting part, an interior of the rotating part being in fluid communication with the sludge conduit; and a driving motor which is connected to the rotating part in a transmission manner so as to drive the rotating part to rotate. The sludge distributor further comprises a plurality of dividing blades, the upper end of each dividing blade is connected to the rotating part and is circumferentially spaced around the rotating part, the lower end of each dividing blade is connected to the end part and is circumferentially spaced around the end part, the space surrounded by the end part and the dividing blades is communicated with the inside of the rotating part in a fluid mode, a plurality of outlets for discharging sludge are formed in gaps among the dividing blades, the rotating part is driven by the driving motor to rotate, and therefore the dividing blades and the end part are driven to rotate together to throw the sludge outwards through the outlets.

According to one or more embodiments of the present invention, the plurality of divided blades are spiral-shaped, extend spirally in a direction of a rotation axis of the rotating portion, and have cross sections extending substantially in a radial direction of the rotating portion.

According to one or more embodiments of the present invention, upper ends of the plurality of division blades are equally spaced circumferentially around the rotating part, and lower ends of the plurality of division blades are equally spaced circumferentially around the end part, so that one stream of sludge can be divided into several streams of sludge of uniform volumes.

According to one or more embodiments of the present invention, a connecting point of the upper end of at least one of the splitter blades to the rotating portion is circumferentially spaced around the rotation axis with respect to a connecting point of the lower end of the splitter blade to the end piece.

According to one or more embodiments of the invention, at least one of the splitter blades has an angle in a range of 55 degrees to 65 degrees with respect to a plane perpendicular to the rotation axis.

The configuration of the segmentation blades is beneficial to the sludge to be segmented into a plurality of strands of sludge with the same volume, and the sludge is thrown out through a sludge outlet formed by the gaps among the spiral segmentation blades under the driving of the rotation part and is uniformly distributed on garbage.

According to one or more embodiments of the invention, the end piece is a cone tapering towards the sludge conduit. Preferably, the end piece is a cone with a circular bottom surface. The end piece rotates synchronously with the rotating part and the plurality of dividing blades to extrude the sludge, and the end piece is matched with the dividing blades to uniformly throw the sludge out of the sludge distributor.

According to one or more embodiments of the present invention, the rotating part is supported on the mounting part by a bearing, wherein the rotating part passes through the bearing and is fixed to an inner ring of the bearing, and an outer ring of the bearing is fixed on an inner wall of the housing of the mounting part. The bearing is preferably a deep groove ball bearing.

According to one or more embodiments of the present invention, the driving motor is controlled by the control box, and the control box controls the driving motor to rotate at a variable frequency, and at the same time, the forward and reverse rotation can be selected, so that the rotating part is driven to rotate in a variable direction and variable speed manner, and the discharge speed of the sludge and the sludge spreading diameter can be controlled.

According to one or more embodiments of the present invention, the sludge pipe is flange-connected to the installation part of the sludge distributor by the sludge pipe made of a flexible material. The first flange below the mounting portion carries the driver case through a support portion made of an elastic material. And a flexible coupling is adopted for connecting the planetary reducer and the driving motor. In addition, an adjusting plate is arranged between the driver box body and the planetary reducer, and a transition support is arranged between the planetary reducer and the driving motor.

The preferred arrangement at least partially eliminates the impact forces between the mounting portion and the driver housing, between the driver housing and the planetary reducer, and between the planetary reducer and the drive motor, thereby at least partially eliminating the impact of the pulsed vibration on the operation of the sludge distributor due to the intermittent feeding of the positive displacement pump.

In actual operation, the displacement pump conveys the dewatered or dried sludge to a garbage feeding point through a main pipe, the main pipe forms a plurality of branch sludge pipes at the garbage feeding point, and each branch is respectively connected with the sludge distributor. The sludge flows through the rotating end piece of the sludge distributor under the pressure push of the positive displacement pump. Under the action of the dividing blades, the sludge conveyed by each branch pipeline is subdivided into a plurality of strands of sludge with uniform volume, and the sludge is uniformly distributed on the surface of the garbage under the action of rotating centrifugal force.

Drawings

Technical solutions according to embodiments of the present invention will now be described in more detail with reference to the accompanying drawings, wherein the illustrations are for the purpose of showing some exemplary embodiments only and are not intended to limit the invention. In the drawings, the same reference numerals designate the same or corresponding parts. The dimensions and proportions in the figures are also intended to be illustrative only and should not be construed as a limitation of the invention.

FIG. 1 is a front perspective view of a sludge distributor according to the present invention;

FIG. 2 isbase:Sub>A cross-sectional view of the sludge distributor according to the present invention taken along line A-A in FIG. 1;

FIG. 3 is a top view of an alternative embodiment of a sludge distributor according to the present invention;

FIG. 4 is a schematic view of an improved sludge dosing uniform distribution system with a sludge distributor according to the present invention.

List of reference numerals

1. Sludge distributor

2. Sludge pipeline

11. Mounting part

12. Rotating part

13. Divided blade

14. End piece

15. Bearing assembly

16. First synchronous pulley

17. Synchronous toothed belt

18. Second synchronous pulley

19. First flange plate

20. Skeleton rotary sealing ring

21. Supporting part

22. Second flange plate

23. Driver box

24. Adjusting plate

25. Planetary reducer

26. Connecting shaft

27. Transition support

28. Driving motor

29. Coupling device

30. Sludge pipeline flange

Detailed Description

In order to make the objects and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference numerals in the drawings denote like elements. It should be noted that the described embodiments are part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Fig. 1 shows a front view of a sludge distributor 1 according to the invention, into which sludge is fed from a sludge conduit 2 in the direction of arrow F1, is rotated by a rotating part 12 and pressed by a conical end piece 14 and is then thrown from the blade gaps of the sludge distributor into the waste in the direction of arrow F2.

As can be seen from fig. 1, the sludge conduit 2 is fixed to the mounting portion 11 of the sludge distributor 1 by a flange 30, and the lower end of the sludge conduit 2 is located inside the housing of the mounting portion 11, discharging sludge toward the rotating portion 12. The rotating portion 12 is rotatably connected to the mounting portion 11, and the inside of the rotating portion 12 is in fluid communication with the sludge conduit 2. In this particularly preferred embodiment, the rotary part 12 is a stainless steel pipe of circular cross-section, the axis of rotation X (i.e. the central axis) of which coincides with the central axis of the sludge pipe 2.

A plurality of partition blades 13 equally spaced in the circumferential direction are connected to the lower portion of the rotating portion 12, and the other ends of the plurality of partition blades 13 are connected to a tapered end part 14 and equally spaced in the circumferential direction around the end part 14. The plurality of divided blades 13 are spiral-shaped and extend spirally in the direction of the rotation axis X of the rotating portion 12, and gaps between the blades form a plurality of outlets through which sludge is discharged. In the preferred embodiment shown in fig. 1, the number of the dividing blades 13 is 8, thereby forming 8 outlets for discharging sludge. The connection point of the upper end of each of the divided vanes 13 to the rotary portion 12 is circumferentially spaced about the rotation axis X with respect to the connection point of the lower end of the divided vane 13 to the end piece 14. Each of the divided blades 13 has a cross section extending substantially in a radial direction of the rotating portion 12. Each of the splitter blades 13 is at an angle of 60 degrees to a plane perpendicular to the rotation axis X. The end piece 14 is a cone with a circular bottom surface tapering towards the sludge conduit, and the lower ends of the dividing blades 13 are distributed evenly circumferentially around the bottom of the cone, so that a single strand of sludge can be easily subdivided into 8 equal volumes of sludge.

When the sludge distributor 1 is operated, sludge enters the sludge pipeline 2 under the extrusion of the positive displacement pump, and the sludge flowing out of the sludge pipeline 2 enters the rotating part 12 and flows into a space surrounded by the end part 14 and the plurality of dividing blades 13 under the action of gravity. With the synchronous rotation of the rotating portion 12, the dividing blades 13 and the end members 14, the sludge is thrown out along the outlet formed by the gaps between the dividing blades 13 by the rotating centrifugal force, and is thus uniformly distributed into the garbage circumferentially.

The rotation of the rotary part 12 is driven by a drive motor 28. As can be seen in fig. 1, the rotary part 12 passes through the bearing 15 and is fixed to an inner ring of the bearing 15, and an outer ring of the bearing 15 is fixed to an inner wall of the housing of the mounting part 11. A first flange 19 with a skeletal rotary seal 20 supports the bearing 15 from below, and the first flange 19 is fixedly attached to the housing of the mounting portion 11 to enclose the bearing 15 in the mounting portion 11. The bearing 15 is preferably a deep groove ball bearing.

The first timing pulley 16 is located between two deep groove ball bearings 15, and the inner periphery of the first timing pulley 16 is fixed to the rotating portion 12 by screws. As can be seen in connection with the section in fig. 2, the first timing pulley 16 is connected to the second timing pulley 18 by means of a timing belt 17.

As shown in fig. 1, the side of the first flange 19 carries a support 21 and a drive case 23 is fixed to the support 21. A second flange 22 is fixed to the bottom of the drive case 23, and the second timing pulley 18 is mounted in the second flange 22. The second synchronous pulley 18 is connected to a planetary reduction gear 25 via a drive case 23, and the planetary reduction gear 25 is connected to a variable frequency drive motor 28 via a coupling 29. Said coupling 29 is preferably a quincunx coupling.

The variable frequency drive motor 28 of the sludge distributor 1 according to the present invention is controlled by a variable frequency control box communicatively connected to the distributed control system DCS or programmable logic controller PLC and controls the rotation of the drive motor 28, and thus the rotation of the rotating part 12, by DCS or PLC programming. The variable frequency control box controls the sludge distributor 1 to automatically carry out variable frequency adjustment on the rotating speed according to time, and the change of the radius of falling sludge is adjusted by changing the rotating speed of the rotating part 12 of the sludge distributor 1, so that the sludge is uniformly distributed.

The above description according to fig. 1 and 2 is only one particularly preferred exemplary embodiment of the invention, however the invention is not restricted thereto, and the sludge distributor of the invention can have a number of other variant embodiments.

As shown in fig. 3, in one or more embodiments according to the present invention, the mounting part 11 may be extended upward to be formed in a tubular form so that the sludge pipe 2 may be fitted in the tubular extension of the mounting part 11 and the sludge pipe 2 is fixed to the mounting part by screwing screws. The way of fixing the sludge pipe 2 to the mounting portion 11 is also not limited thereto, and for example, the sludge pipe 2 may be fixed to the mounting portion by welding or providing corresponding threads on the upper portions of the sludge pipe 2 and the mounting portion 11.

In a preferred embodiment of the invention, the lower end of the sludge conduit 2 extends into the rotating portion 12 and the outer diameter of the sludge conduit 2 is adapted to fit the inner diameter of the rotating portion 12, so that sludge is easily introduced into the rotating portion and is brought into rotation and overflow of sludge is prevented. In alternative embodiments of the present invention, the positional relationship and dimensions of the sludge conduit 2 and the rotary part 12 may not be limited to the above description but may have any suitable form as long as the sludge conduit 2 is in fluid communication with the interior of the rotary part 12.

In the preferred embodiment of the present invention, the sludge distributor 1 has 8 divided blades 13, and each of the divided blades 13 is spiral-shaped and extends spirally in the direction of the rotation axis X of the rotating part 12. The 8 splitter blades 13 are equally spaced circumferentially at their upper ends around the rotating portion 12 and equally spaced circumferentially at their lower ends around the bottom circumference of the conical end piece 14. The connection point of the upper end of at least one of the splitter blades 13 to the rotary section 12 is circumferentially spaced about the rotation axis X relative to the connection point of the lower end of the splitter blade 13 to the end piece 14. In an alternative embodiment of the present invention, the shape of the dividing blade 13 is not limited to a spiral shape, and may be a strip or a plate. Further, the number of the divided blades 13 may be any number of 2 or more, and the positions of the upper and lower ends of the divided blades 13 in the circumferential direction may be any.

In a preferred embodiment of the present invention, the angle of the splitter blade 13 with respect to a plane perpendicular to the rotation axis X of the rotary portion 12 is in the range of 55 degrees to 65 degrees. It is particularly preferable that each of the split blades 13 is at an angle of 60 degrees to a plane perpendicular to the rotation axis X of the rotating portion 12.

In a preferred embodiment of the invention, the end piece 14 is a cone tapering in the direction towards the sludge pipe 2. In an alternative embodiment of the invention, the bottom surface shape of the end piece 14 may be any shape suitable for connection with a plurality of splitter vanes 13.

In an alternative embodiment of the invention, the number of bearings 15 may be arbitrary, and the bearings 15 may be placed in a bearing box fixed to the inner wall of the housing of the mounting portion 11 to form a protection for the bearings 15.

In addition, since the positive displacement pump is intermittently fed during the sludge transportation process, the sludge distributor 1 located at the end of the sludge pipe 2 is pulsed to affect the operation of the sludge distributor 1.

Therefore, in a particularly preferred embodiment of the invention, the sludge conduit 2 is connected to the mounting 11 of the sludge distributor 1 by a sludge conduit flange 30 made of a flexible material. The first flange 19 located below the mounting portion 11 carries a driver case 23 through a support portion 21 made of an elastic material. The coupling 29 connecting the planetary reducer 25 and the drive motor 28 is preferably a flexible coupling. Further, an adjustment plate 24 is provided between the driver case 23 and the planetary reduction gear 25, and a transition bracket 27 is provided between the planetary reduction gear 25 and the drive motor 28.

The above preferred arrangement enables the impact forces between the mounting portion 11 and the driver case 23, between the driver case 23 and the planetary reducer 25, and between the planetary reducer 25 and the drive motor 28 to be at least partially eliminated, thereby at least partially eliminating the influence of the pulsed vibrations caused by the intermittent feeding of the positive displacement pump on the operation of the sludge distributor 1.

As shown in fig. 4, the positive displacement pump delivers the dewatered or dried sludge to a waste feeding point through a main pipe, the main pipe forms a plurality of branch sludge pipes 2 at the waste feeding point, and each branch is connected to a sludge distributor 1 described herein. The sludge flows through the rotating end piece 14 of the sludge distributor 1 under the pressure push of the positive displacement pump. Under the action of the dividing blades 13, the sludge conveyed by each branch pipeline is subdivided into 1/8 volume of sludge, and the sludge is distributed on the surface of the garbage under the action of the rotary centrifugal force.

By using the sludge distributor described herein, the improved sludge feeder distributor has the following advantages:

according to the feeding mode in the prior art, sludge can only be dropped at one point, so that the sludge is piled and agglomerated, and the sludge is difficult to burn through when entering a furnace. By adopting the technical scheme of the invention, for a system with M branch pipelines and a sludge distributor with N dividing blades (M and N are both natural numbers which are more than or equal to 2), the added volume of the single-strand sludge is subdivided into 1/(M N) of the original volume. And, under the drive of rotating part, discharged mud is radially thrown away uniformly, and the area of spreading is about 20 times original, has improved the proportion that mud mixes and burns rubbish. In addition, the sludge distributor disclosed by the invention allows sludge with lower water content to be added, so that the energy consumption cost required by dehydrating or drying the sludge is saved.

The sludge distributor disclosed by the invention adopts a distributed control system DCS or a programmable logic controller PLC, and the rotation of the driving motor is controlled through the DCS or the PLC, so that the rotation speed of the rotating part is controlled, and the falling radius of the sludge is adjusted. The operation of the sludge distributor does not need to be monitored and adjusted on site by workers, the operation condition of the sludge distributor can be monitored in a remote visual mode through an operation panel, and the rotating speed of the sludge distributor can be adjusted according to the site conditions. Thereby realizing the remote operation, the visual monitoring and the flexible dynamic adjustment of the sludge distributor of the sludge distribution system.

The standard parts used in the invention can be purchased from the market, and can be customized according to the specification and the description of the drawings, the specific connection mode of each part adopts the conventional means such as mature screws, welding and the like in the prior art, the machinery, parts and equipment adopt the conventional models in the prior art, and the structure and the principle of the parts known by the technical staff can be known by the technical manual or the conventional experimental method.

Although the exemplary embodiment of the sludge distributor proposed by the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications can be made to the specific embodiments described above, and various combinations of the various technical features and structures proposed by the present invention can be made without departing from the concept of the present invention.

Claims

1. A sludge distributor (1) comprising:

a mounting portion (11), the mounting portion (11) being fixedly connected to the sludge pipe (2);

a rotating part (12), the rotating part (12) being rotatably connected to a mounting part (11), the interior of the rotating part (12) being in fluid communication with a sludge conduit (2); and

a drive motor (28), the drive motor (28) being drivingly connected to the rotary part (12) for driving the rotary part (12) in rotation;

the sludge distributor (1) further comprises a plurality of dividing blades (13), the upper end of each dividing blade (13) is connected to the rotating part (12) and is circumferentially spaced around the rotating part (12), the lower end of each dividing blade (13) is connected to an end part (14) and is circumferentially spaced around the end part (14), a space surrounded by the end part (14) and the dividing blades (13) is communicated with the inside of the rotating part (12) in a fluid mode, gaps among the dividing blades (13) form a plurality of outlets for discharging sludge, and the rotating part (12) is driven by a driving motor (28) to rotate around a rotating axis (X), so that the dividing blades (13) and the end part (14) are driven to rotate together to throw the sludge outwards through the outlets.

2. The sludge distributor (1) according to claim 1, wherein the plurality of dividing blades (13) are helical, extending helically in the direction of the rotation axis (X) of the rotating part (12).

3. The sludge distributor (1) according to claim 1, wherein the upper ends of the plurality of dividing blades (13) are evenly equally spaced circumferentially around the rotating part (12) and the lower ends of the plurality of dividing blades (13) are evenly equally spaced circumferentially around the end part (14).

4. Sludge distributor (1) according to claim 1, wherein the connection point of the upper end of at least one of the dividing vanes (13) to the rotating part (12) is circumferentially spaced around the rotation axis (X) with respect to the connection point of the lower end of the dividing vane (13) to the end part (14).

5. Sludge distributor (1) according to claim 4, wherein at least one of the dividing blades (13) has an angle in the range of 55 to 65 degrees with a plane perpendicular to the rotation axis (X).

6. Sludge distributor (1) according to claim 1, wherein the end piece (14) is a cone tapering towards the sludge conduit (2).

7. Sludge distributor (1) according to claim 1, wherein the rotating part (12) is supported on the mounting part (11) by means of bearings (15).

8. Sludge distributor (1) according to claim 7, wherein the rotating part (12) is fixed to an inner ring of a bearing (15) through the bearing (15) and an outer ring of the bearing (15) is fixed on an inner wall of the housing of the mounting part (11).

9. Sludge distributor (1) according to claim 1, wherein the drive motor (28) is controlled by a control box controlling the drive motor (28) to rotate at a varying frequency.

10. A sludge distributor (1) according to claim 9, wherein the control box controls the rotation rate of the rotating part (12) by adjusting the frequency of the drive motor (28) to adjust the drop radius of the sludges being slushed.

11. Sludge distributor (1) according to claim 1, wherein the mounting part (11) comprises a sludge conduit flange (30), the sludge conduit (2) is mounted to the mounting part (11) by means of the sludge conduit flange (30), and the sludge conduit flange (30) is made of a flexible material.

12. Sludge distributor (1) according to claim 1, wherein the mounting portion (11) supports a driver box (23) by a support portion (21) and the support portion (21) is made of an elastic material.