A high efficiency mixing reactor for sludge and conditioning chemicals

Abstract

The utility model provides a kind of efficient mixing reactor of sludge and conditioning agent, including pipeline for conveying sludge and conditioning agent, along the flow direction of fluid in pipeline, the pipeline is equipped with sludge and conditioning agent feed area, primary flow guide mixing area, primary crushing area, secondary flow guide mixing area, secondary crushing area and homogenization discharge area in turn, the sludge and conditioning agent feed area is equipped with sludge feed inlet and conditioning agent feed inlet, the primary flow guide mixing area and secondary flow guide mixing area are used to make sludge and conditioning agent fully mix, the primary crushing area and secondary crushing area are equipped with crushing device for crushing sludge, the homogenization discharge area is equipped with port connected with dewatering equipment.The utility model realizes the leap from "simple mixing" to "homogenization conditioning" by the physical combination of "flow guide+crushing", solves the problem of dead angle and "paste" left by traditional stirring mixing mode.

Description

Technical Field

[0001] This utility model relates to the field of sludge conditioning, and in particular to a high-efficiency mixing reactor for sludge and conditioning agents. Background Technology

[0002] In the sludge dewatering process, chemical conditioning (addition of polyaluminum chloride (PAC), polyacrylamide (PAM), etc.) is a crucial pre-treatment step. The effectiveness of the conditioning directly determines the final dewatering efficiency and the moisture content of the sludge cake. Currently used methods of mixing conditioning agents with sludge have the following drawbacks:

[0003] Traditional mixing tanks rely on mechanical agitators, resulting in dead zones and uneven distribution of conditioning agents; some areas may have excessive conditioning agents while others may be under-mixed; and the hydraulic retention time is relatively long, requiring a large equipment footprint.

[0004] Pipeline mixers (static mixers): Although they solve the problem of space occupation, they are not adaptable to viscous sludge; for larger flocs that have initially formed but have uneven structure, their shearing and breaking capacity is limited, which can easily lead to the "coating" phenomenon - that is, the conditioning agent only coats the surface of the floc, and the internal sludge is not effectively destabilized, affecting the dewatering effect.

[0005] The aforementioned problems necessitate the addition of excessive conditioning agents to ensure the conditioning effect of the sludge, increasing operating costs. Furthermore, due to the poor conditioning effect of the sludge, i.e., the sludge and conditioning agents cannot be fully mixed, the subsequent sludge dewatering effect fluctuates significantly.

[0006] Therefore, it is necessary to design a new, highly efficient mixing reactor for sludge and conditioning agents to overcome the above problems. Utility Model Content

[0007] The purpose of this invention is to overcome the defects of the prior art and provide a pipeline reactor with high mixing efficiency, active ability to break up large flocs, ensure full contact between the reagent and sludge particles, and simple structure that requires no maintenance. This invention solves at least some of the problems of the prior art.

[0008] This utility model is implemented as follows:

[0009] This utility model provides a high-efficiency mixing reactor for sludge and conditioning agents, including a pipeline for conveying sludge and conditioning agents. Along the flow direction of the fluid in the pipeline, the pipeline is sequentially provided with a sludge and conditioning agent feeding zone, a primary guiding mixing zone, a primary crushing zone, a secondary guiding mixing zone, a secondary crushing zone, and a homogenized discharge zone. The sludge and conditioning agent feeding zone is provided with a sludge inlet and a conditioning agent inlet. The primary guiding mixing zone and the secondary guiding mixing zone are used to fully mix the sludge and conditioning agents. The primary crushing zone and the secondary crushing zone are both provided with crushing devices for crushing sludge. The homogenized discharge zone is provided with a port for connecting to dewatering equipment.

[0010] Furthermore, the sludge and conditioning agent feeding area is equipped with a sludge feeding branch pipe, a conditioning agent feeding branch pipe, and a three-way connector. The sludge inlet of the sludge feeding branch pipe and the conditioning agent inlet of the conditioning agent feeding branch pipe are both equipped with atomizing nozzles. The sludge outlet of the sludge feeding branch pipe is connected to the first fluid inlet of the three-way connector, the conditioning agent outlet of the conditioning agent feeding branch pipe is connected to the second fluid inlet of the three-way connector, and the fluid outlet of the three-way connector is connected to the fluid inlet of the primary flow guiding mixing zone.

[0011] Furthermore, several guide plates are staggered on the inner walls of the pipes in both the primary flow mixing zone and the secondary flow mixing zone. The guide plates are inclined on the inner walls of the pipes, and the inclination directions of adjacent guide plates are opposite.

[0012] Furthermore, the inclination angle between the guide plate and the inner wall of the pipe is 30°~60°.

[0013] Furthermore, the primary crushing zone is equipped with a fine grid with sharp cutting edges, and the spacing between the grid bars is 0.5~3mm.

[0014] Furthermore, the fine grid is a corrosion-resistant stainless steel fine grid.

[0015] Furthermore, the secondary crushing zone is provided with a honeycomb porous screen plate, which has multiple conical through holes for fluid to flow through, and the diameter of the conical through holes gradually decreases along the fluid flow direction.

[0016] Furthermore, the feed end diameter of the tapered through hole is 3mm, and the discharge end diameter of the tapered through hole is 0.5mm.

[0017] Furthermore, both ends of the pipeline of the high-efficiency mixing reactor are equipped with flanges to facilitate connection with other pipelines.

[0018] Furthermore, the pipe length of the high-efficiency mixing reactor is 5-10 times its diameter.

[0019] This utility model has the following beneficial effects:

[0020] 1. Qualitative change in mixing effect: Through the physical combination of "flow guidance + crushing", a leap from "simple mixing" to "homogenized conditioning" has been achieved, solving the dead corners and "patina" problems left over from traditional stirring and mixing methods.

[0021] 2. Saves on drug dosage: The utilization rate of conditioning drugs is extremely high, which can save 15%-30% of the drug dosage, directly reducing operating costs.

[0022] 3. Improved dewatering performance: The formed flocs (flocculated material formed after sludge and conditioning agents are mixed) are uniform and dense, and free water is more easily separated, which can significantly reduce the moisture content of the discharged sludge and improve the processing capacity of subsequent dewatering equipment.

[0023] 4. No power required, maintenance-free: The primary flow mixing zone, primary crushing zone, secondary flow mixing zone, secondary crushing zone and homogenization discharge zone all utilize the fluid's own kinetic energy, with no rotating parts, no need for motors, no consumption of additional power, virtually no maintenance required, and extremely high reliability.

[0024] 5. Minimal footprint and flexible installation: As part of the pipeline, it can be directly installed on any existing sludge pipeline, making modification simple and widely applicable.

[0025] 6. Promotes continuous and stable operation: It provides stable and high-quality feeding conditions for subsequent dewatering equipment, reducing equipment fluctuations or blockages caused by poor conditioning. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the overall structure of the high-efficiency mixing reactor for sludge and conditioning agents provided in this embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the fine grid in the primary crushing zone provided in an embodiment of this utility model;

[0029] Figure 3 A schematic diagram of a honeycomb porous sieve plate in the secondary crushing zone provided in an embodiment of this utility model.

[0030] In the diagram: 1. Pipeline; 2. Sludge and conditioning agent feeding zone; 3. Primary flow mixing zone; 4. Primary crushing zone; 5. Secondary flow mixing zone; 6. Secondary crushing zone; 7. Homogenized discharge zone; 8. Sludge feed branch pipe; 9. Conditioning agent feed branch pipe; 10. T-connector; 11. Sludge inlet; 12. Conditioning agent inlet; 13. Atomizing nozzle; 14. Guide plate; 15. Fine screen; 16. Spacing between screen bars; 17. Honeycomb porous screen plate; 18. Conical through hole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "several" means two or more.

[0033] like Figures 1-3 This invention provides a high-efficiency mixing reactor for sludge and conditioning agents, featuring flow guidance and crushing functions. The high-efficiency mixing reactor is a straight or slightly tapered pipe 1 with standard flanges at both ends for easy connection to other pipes. The length of pipe 1 is 5-10 times its diameter. Along the fluid flow direction, the high-efficiency mixing reactor sequentially includes a sludge and conditioning agent feeding zone 2, a primary flow guidance mixing zone 3, a primary crushing zone 4, a secondary flow guidance mixing zone 5, a secondary crushing zone 6, and a homogenized discharge zone 7. The fluid consists of sludge and conditioning agents. This invention achieves a leap from "simple mixing" to "homogenized conditioning" through the physical combination of "flow guidance + crushing," solving the dead zones and "coating" problems left by traditional stirring mixing methods.

[0034] The sludge and conditioning agent feeding zone 2 is equipped with a sludge feeding branch pipe 8, a conditioning agent feeding branch pipe 9, and a three-way connector 10. The sludge inlet 11 of the sludge feeding branch pipe 8 and the conditioning agent inlet 12 of the conditioning agent feeding branch pipe 9 are respectively equipped with atomizing nozzles 13. The atomizing nozzles 13 are used in conjunction with an air compressor. The high-pressure compressed gas provided by the air compressor can carry the sludge or conditioning agent through the atomizing nozzles 13 for atomization. The sludge outlet of the sludge feeding branch pipe 8 is connected to the first fluid inlet of the three-way connector 10, and the conditioning agent outlet of the conditioning agent feeding branch pipe 9 is connected to the second fluid inlet of the three-way connector 10. The fluid outlet of the three-way connector 10 is connected to the fluid inlet of the primary flow mixing zone 3. The atomized sludge and atomized conditioning agent are initially mixed at the three-way connector 10, resulting in a more uniform mixture, before entering the primary flow mixing zone 3.

[0035] Both the primary flow mixing zone 3 and the secondary flow mixing zone 5 have a plurality of flow guide plates 14 arranged alternately on their inner walls. In this embodiment, for example... Figure 1 The guide plates 14 at the top and bottom of the inner wall of the pipe are arranged alternately. The guide plates 14 are inclined on the inner wall of the pipe 1, with adjacent guide plates 14 having opposite inclination directions. The guide plates 14 are welded to the inner wall of the pipe 1. The inclination angle between the guide plates 14 and the inner wall of the pipe is 30°~60°, preferably 45°. Adjacent guide plates 14 have opposite inclination directions. When fluid flows through, the guide plates 14 continuously cut and divide the fluid, changing its flow direction and generating strong turbulence and vortices. This intense disturbance allows the conditioning agent and sludge to achieve preliminary macroscopic mixing in a very short time, enabling rapid diffusion of the conditioning agent within the sludge particles, which then enter the primary crushing zone 4.

[0036] The primary crushing zone 4 is equipped with a fine grid 15 with sharp cutting edges, and the spacing between the grid bars is 16 ( Figure 2 The side length of the small square holes is 0.5~3mm, and the spacing 16 between the grid bars is preferably 3mm. After preliminary mixing, the fluid enters this area, and the larger flocs are forcibly sheared and broken when passing through the fine grid 15, thus dispersing the uneven large flocs formed during the mixing process.

[0037] The fluid, after initial crushing, enters the secondary guiding mixing zone 5, where it is agitated again, allowing the newly exposed sludge surface to come into contact with the conditioning agent.

[0038] The fluid then passes through a secondary crushing zone 6, which is equipped with a honeycomb porous sieve plate 17. The honeycomb porous sieve plate 17 has multiple conical through-holes 18 for fluid flow. The diameter of the conical through-holes 18 is 0.5mm to 3mm, with the inlet diameter preferably 3mm and the outlet diameter preferably 0.5mm. The diameter of the conical through-holes gradually decreases along the fluid flow direction. After secondary flow guidance and mixing, the fluid flows through the secondary crushing zone 6. When the fluid is forced through the conical through-holes 18 of the honeycomb porous sieve plate 17, a huge shearing force is generated. Larger flocs are forcibly sheared and broken up here, exposing new surfaces, allowing the internal sludge particles that could not contact the reagent in time to fully react with the reagent. This is a "breaking down the old and establishing the new" process, the purpose of which is to form uniformly sized, densely structured micro-flocs.

[0039] Finally, the fluid enters the homogenized discharge zone 7. At this point, the fluid material is sludge that has been efficiently conditioned and covered with uniform tiny flocs, and can be directly fed into subsequent dewatering equipment (such as screw press, centrifuge, plate and frame filter press).

[0040] The high-efficiency mixing reactor provided by this invention provides stable and high-quality feeding conditions for subsequent dewatering equipment, reducing equipment fluctuations or blockages caused by poor conditioning.

[0041] In this embodiment, the guide plate 14, the honeycomb porous sieve plate 17, and the fine grid 15 with sharp blades are all made of corrosion-resistant stainless steel 304 or 316.

[0042] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency mixing reactor for sludge and conditioning agents, characterized in that: The system includes a pipeline for conveying sludge and conditioning agents. Along the flow direction of the fluid within the pipeline, the pipeline is sequentially provided with a sludge and conditioning agent feeding zone, a primary guiding mixing zone, a primary crushing zone, a secondary guiding mixing zone, a secondary crushing zone, and a homogenized discharge zone. The sludge and conditioning agent feeding zone is provided with a sludge inlet and a conditioning agent inlet. The primary and secondary guiding mixing zones are used to fully mix the sludge and conditioning agents. The primary and secondary crushing zones are each provided with a crushing device for crushing the sludge. The homogenized discharge zone is provided with a port for connecting to dewatering equipment.

2. The high-efficiency mixing reactor for sludge and conditioning agents as described in claim 1, characterized in that: The sludge and conditioning agent feeding area is equipped with a sludge feeding branch pipe, a conditioning agent feeding branch pipe, and a three-way connector. The sludge inlet of the sludge feeding branch pipe and the conditioning agent inlet of the conditioning agent feeding branch pipe are both equipped with atomizing nozzles. The sludge outlet of the sludge feeding branch pipe is connected to the first fluid inlet of the three-way connector, the conditioning agent outlet of the conditioning agent feeding branch pipe is connected to the second fluid inlet of the three-way connector, and the fluid outlet of the three-way connector is connected to the fluid inlet of the primary flow guiding mixing zone.

3. The high-efficiency mixing reactor for sludge and conditioning agents as described in claim 1, characterized in that: Several guide plates are staggered on the inner wall of the pipe in both the primary flow mixing zone and the secondary flow mixing zone. The guide plates are inclined on the inner wall of the pipe, and the inclination directions of adjacent guide plates are opposite.

4. The high-efficiency mixing reactor for sludge and conditioning agents as described in claim 3, characterized in that: The angle of inclination between the guide plate and the inner wall of the pipe is 30°~60°.

5. The high-efficiency mixing reactor for sludge and conditioning agents as described in claim 1, characterized in that: The primary crushing zone is equipped with a fine screen with sharp cutting edges, and the spacing between the screen bars is 0.5~3mm.

6. The high-efficiency mixing reactor for sludge and conditioning agents as described in claim 5, characterized in that: The fine mesh is a corrosion-resistant stainless steel fine mesh.

7. The high-efficiency mixing reactor for sludge and conditioning agents as described in claim 1, characterized in that: The secondary crushing zone is equipped with a honeycomb porous screen plate, which has multiple conical through holes for fluid to flow through. The diameter of the conical through holes gradually decreases along the fluid flow direction.

8. The high-efficiency mixing reactor for sludge and conditioning agents as described in claim 7, characterized in that: The feed end diameter of the tapered through hole is 3mm, and the discharge end diameter of the tapered through hole is 0.5mm.

9. The high-efficiency mixing reactor for sludge and conditioning agents as described in claim 1, characterized in that: The high-efficiency mixing reactor has flanges at both ends of its pipes to facilitate connection with other pipes.

10. The high-efficiency mixing reactor for sludge and conditioning agents as described in claim 1, characterized in that: The pipe length of a high-efficiency mixing reactor is 5-10 times its diameter.

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