Stirring device for hydrothermal carbonization of sludge

Abstract

The utility model discloses a stirring device for sludge hydrothermal carbonization, belongs to the technical field of stirring equipment, and provides a stirring device for sludge hydrothermal carbonization, which is high in efficiency and good in uniform mixing effect, and comprises an isolation kettle, a plurality of convection holes penetrating through the inner wall and the outer wall are formed in the side wall of the isolation kettle, and the plurality of convection holes are arranged along the generatrix of the isolation kettle; the top of the isolation kettle is fixedly connected with a rack, the top of the rack is provided with a driving mechanism, the output end of the driving mechanism is connected with a stirring structure through a transmission shaft, the stirring structure is suitable for stirring materials in the isolation kettle, meanwhile, the materials are sucked into the isolation kettle through convection holes in the lower portion, and the materials are discharged out of the isolation kettle through convection holes in the upper portion. According to the utility model, the convection hole structure is arranged on the side wall of the isolation kettle, and the stirring structure with the spiral scraping plate is arranged in the isolation kettle, so that sludge with relatively high concentration at the bottom can turn over upwards, and the process can be continuous and uninterrupted, thereby not only improving the uniform mixing efficiency of the sludge, but also being better in uniform mixing effect.

Description

Technical Field

[0001] This application relates to the technical field of stirring equipment, and particularly relates to a stirring device for sludge hydrothermal carbonization. Background Art

[0002] Hydrothermal carbonization of sludge can reduce, harmlessize and stabilize waste, with high economy. However, due to a large amount of insoluble substances in sludge, stratification is likely to occur. In order to obtain carbide with uniform texture, sludge needs to be mixed evenly, which requires a stirring device.

[0003] Most traditional stirring devices require sludge to enter the tank first, be mixed evenly and then discharged. This injection and discharge process needs to be carried out many times, with low efficiency. There are continuous stirring devices in the prior art, but since the mud-water ratio of the sludge continuously injected into the stirring device is not uniform, even if the efficiency is improved, the final uniformity of the sludge obtained is not high. Summary of the Invention

[0004] The purpose of this application is to provide a stirring device for sludge hydrothermal carbonization with high efficiency and good mixing effect.

[0005] To achieve the above purpose, this application provides a stirring device for sludge hydrothermal carbonization: including an isolation kettle, a plurality of convection holes penetrating the inner and outer walls are provided on the side wall of the isolation kettle, and the plurality of convection holes are arranged along the generatrix of the isolation kettle. A frame is fixedly connected to the top of the isolation kettle, a driving mechanism is arranged on the top of the frame, and the output end of the driving mechanism is connected with a stirring structure through a transmission shaft, which is suitable for stirring the materials in the isolation kettle, and at the same time sucking the materials into the isolation kettle through the convection holes below and discharging the materials from the isolation kettle through the convection holes above. When the sludge passes through the convection holes, it will be forced to be refined, which is beneficial to improving the homogeneity of the sludge.

[0006] As a preference, the stirring structure includes a stirring shaft fixedly connected to the lower end of the transmission shaft. A plurality of transverse stirring rods are fixedly connected to the outer side surface of the stirring shaft, and a spiral scraping plate is fixedly connected to the ends of the transverse stirring rods away from the stirring shaft, which is used to push the sludge near the inner wall of the reaction kettle from the bottom to the top.

[0007] As a preference, the diameter of the spiral scraping plate is constant, and longitudinal stirring rods are fixedly connected between layers of the spiral scraping plate, which, together with the transverse stirring rods, apply a horizontal thrust to the sludge to make the sludge rotate and generate centrifugal force.

[0008] As a preference, a collar is fixedly connected to the center of the bottom of the isolation kettle, and the lower end of the stirring shaft is inserted into the collar to form a rotating pair, improving the working stability of the stirring structure.

[0009] As a preference, the upper end of the isolation kettle is provided with an installation bottom cover, which is fixedly connected to the frame. The driving mechanism includes a matched electric motor and a speed reducer. The upper end of the transmission shaft is connected to the output end of the speed reducer through a coupling, so as to obtain a rotational driving force.

[0010] As a preference, a mechanical seal sleeve is arranged above the installation bottom cover. The installation bottom cover is provided with a main shaft hole below the mechanical seal sleeve. The transmission shaft passes through the mechanical seal sleeve and is matched with the main shaft hole to form a rotating pair, which can reduce the pollution of the driving mechanism by sludge.

[0011] As a preference, the outer side surface of the isolation kettle has a fixing plate, which is located above all the convection holes. A plurality of connecting holes are formed in the fixing plate for connecting parts such as bolts to pass through, so as to fix the whole stirring device on a working platform or a movable metal bracket.

[0012] As a preference, the electric motor is located above the speed reducer, and a fan is arranged on the top of the electric motor for active cooling to ensure the continuous and stable operation of the electric motor.

[0013] Compared with the prior art, the beneficial effects of the present application are as follows:

[0014] (1) By arranging a convection hole structure on the side wall of the isolation kettle and arranging a stirring structure with a spiral scraping plate in the isolation kettle, the sludge with a higher concentration at the bottom can be turned up and fully mixed with the thinner sludge above. This process can continue uninterruptedly, which not only improves the mixing efficiency of the sludge, but also has a better mixing effect;

[0015] (2) Since the sludge will pass through the convection holes, the sludge lumps in the sludge will be forced to be broken up and refined. The sludge lumps will become smaller and smaller after repeatedly passing through the convection holes until they dissolve in the thin mud invisibly, so that the sludge homogeneity obtained will be higher. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the overall structure of the stirring device for sludge hydrothermal carbonization.

[0017] Figure 2 It is a plane sectional view of the stirring device for sludge hydrothermal carbonization.

[0018] Figure 3 It is a three-dimensional structure schematic diagram of the cooperation between the stirring structure and the driving mechanism of the stirring device for sludge hydrothermal carbonization.

[0019] Figure 4 It is a three-dimensional structure schematic diagram of the stirring structure of the stirring device for sludge hydrothermal carbonization.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the isolation kettle of the stirring device for sludge hydrothermal carbonization.

[0021] In the figure: 1. Motor; 2. Reducer; 3. Frame; 4. Mechanical seal sleeve; 5. Isolation kettle; 501. Installation bottom cover; 502. Main shaft hole; 503. Fixed disk; 504. Connection hole; 505. Convection hole; 506. Shaft collar; 6. Stirring structure; 601. Stirring shaft; 602. Transverse stirring rod; 603. Spiral scraping plate; 604. Longitudinal stirring rod; 7. Coupling; 8. Transmission shaft; 9. Fan. Specific embodiments

[0022] Next, in combination with specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0023] In the description of the present application, it should be noted that for orientation terms, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence.

[0025] The terms "comprising" and "having" in the description and claims of the present application, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] Such as Figures 1-5The stirring device for sludge hydrothermal carbonization shown in the figure includes a convoluted isolation kettle 5. The main part of the isolation kettle 5 is cylindrical, and the top and bottom are usually arc-shaped. A number of convection holes 505 penetrating the inner and outer walls are provided on the side wall of the isolation kettle 5 for the passage of sludge with relatively high fluidity. The number of convection holes 505 is arranged along the generatrix of the isolation kettle 5. These convection holes 505 are usually divided into two groups, with each group of convection holes 505 located on the opposite sides of the isolation kettle 5, and multiple convection holes 505 in each group are equally spaced.

[0027] A frame 3 is fixedly connected to the top of the isolation kettle 5. The frame 3 is a hollow frustum of a cone with a larger lower end and a smaller upper end. A driving mechanism is provided at the top of the frame 3. The upper end of the isolation kettle 5 has an installation bottom cover 501 fixedly connected to the frame 3. The installation bottom cover 501 is disc-shaped and is located at the center of the top of the isolation kettle 5. The driving mechanism includes a matched motor 1 and a reducer 2. The output end of the motor 1 is connected to the input end of the reducer 2 to increase the output torque of the entire driving mechanism. The motor 1 is located above the reducer 2, and an independently controlled fan 9 is also provided at the top of the motor 1, which is usually used in cooperation with a temperature sensor to actively cool the motor 1.

[0028] The output end of the driving mechanism is connected to a stirring structure 6 through a transmission shaft 8, which is suitable for agitating the materials in the isolation kettle 5, and at the same time sucking the materials into the isolation kettle 5 through the lower convection holes 505 and discharging the materials out of the isolation kettle 5 through the upper convection holes 505. In this process, the narrow convection holes 505 can be used to break and refine the agglomerated parts in the sludge. Specifically: the upper end of the transmission shaft 8 is connected to the output end of the reducer 2 through a coupling 7 to obtain rotational power. The stirring structure 6 includes a stirring shaft 601 fixedly connected to the lower end of the transmission shaft 8. The stirring shaft 601 is coaxial with the transmission shaft 8. A number of transverse stirring rods 602 are fixedly connected to the outer side surface of the stirring shaft 601. In this embodiment, all the transverse stirring rods 602 are perpendicular to the stirring shaft 601 and are used to provide a horizontal driving force for the sludge. The ends of the transverse stirring rods 602 away from the stirring shaft 601 are commonly fixedly connected to a spiral scraping plate 603. Since the spiral scraping plate 603 rises along the spiral direction and the outer side surface of the spiral scraping plate 603 is very close to the inner wall of the isolation kettle 5, the rotating sludge will rise along with the spiral scraping plate 603 due to the action of centrifugal force. Generally, the diameter of the spiral scraping plate 603 is constant and the pitch is unchanged. Longitudinal stirring rods 604 are also fixedly connected between the layers of the spiral scraping plate 603. The longitudinal stirring rods 604 are parallel to the stirring shaft 601. On the one hand, they apply a thrust to the sludge near the inner wall of the isolation kettle 5; on the other hand, they can cooperate with the spiral scraping plate 603 to scrape the sludge adhering to the inner wall of the isolation kettle 5.

[0029] In the center of the bottom of the isolation kettle 5, there is a fixedly connected shaft collar 506. A thrust bearing structure is usually arranged inside the shaft collar 506. In this way, the lower end of the stirring shaft 601 is inserted into the shaft collar 506 to form a stable rotating pair, providing a supporting force for the entire stirring structure 6 and avoiding the shaking of the lower end of the stirring shaft 601, making the stirring structure 6 operate more smoothly and stably during work. Above the mounting bottom cover 501, there is a mechanical seal sleeve 4. And the mounting bottom cover 501 has a main shaft hole 502 below the mechanical seal sleeve 4. The transmission shaft 8 passes through the mechanical seal sleeve 4 and cooperates with the main shaft hole 502 to form a rotating pair. Usually, a bearing structure is also arranged inside the main shaft hole 502 to reduce the rotational resistance of the transmission shaft 8. The mechanical seal sleeve 4 is used to prevent sewage from contacting the driving mechanism through the transmission shaft 8. Because the sewage may have certain acidity and alkalinity and has a corrosive effect on the transmission mechanism. The outer side of the isolation kettle 5 has a fixing plate 503, which can be placed on a working platform or a metal bracket. The fixing plate 503 is located above all the convection holes 505. All the sludge flow processes take place below the fixing plate 503. The fixing plate 503 is provided with several connecting holes 504 for connecting parts such as bolts to pass through to fix the entire stirring device on a reinforced concrete platform.

[0030] Working principle: This stirring device needs to be used in a sludge treatment tank. The entire stirring device is suspended above the sludge treatment tank through the fixing plate 503, and it is ensured that most of the convection holes 505 of the isolation kettle 5 are below the sludge liquid level. The sludge with good fluidity will enter the isolation kettle 5 through the convection holes 505. Start the driving mechanism to drive the stirring structure 6 to rotate clockwise in the top view direction. The transverse stirring rod 602 and the longitudinal stirring rod 604 will rotate the sludge in the isolation kettle 5, causing a certain centrifugal force to be generated in the sludge in the isolation kettle 5, and then rising along with the spiral scraping plate 603 and discharging from the upper convection holes 505 out of the isolation kettle 5. Since the sludge inside the isolation kettle 5 decreases and the internal pressure decreases, the sludge below will enter the isolation kettle 5 through the lower convection holes 505. And when the lower-positioned sludge is being sucked in, the larger sludge lumps will be squeezed and broken by the narrow convection holes 505, thus being refined. Repeat the above cycle, and the sludge in the sludge tank that was originally unevenly stratified up and down will gradually become a homogeneous system. When the uniformity of the sludge meets the standard, hydrothermal carbonization treatment can be carried out.

[0031] The above describes the basic principle, main features and advantages of this application. Those skilled in the art of this industry should understand that this application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of this application. Without departing from the spirit and scope of this application, this application will have various changes and improvements, and these changes and improvements all fall within the scope of this application claimed. The scope of protection required by this application is defined by the appended claims and their equivalents.

Claims

1. A stirring device for sludge hydrothermal carbonization, characterized in that: It includes an isolation kettle (5), and a number of convection holes (505) penetrating the inner and outer walls are formed on the side wall of the isolation kettle (5). The number of the convection holes (505) is arranged along the generatrix of the isolation kettle (5). A frame (3) is fixedly connected to the top of the isolation kettle (5), and a driving mechanism is arranged on the top of the frame (3). The output end of the driving mechanism is connected with a stirring structure (6) through a transmission shaft (8), which is suitable for stirring the materials in the isolation kettle (5), and at the same time sucking the materials into the isolation kettle (5) through the lower convection holes (505) and discharging the materials out of the isolation kettle (5) through the upper convection holes (505).

2. The stirring device for sludge hydrothermal carbonization according to claim 1, wherein: The stirring structure (6) includes a stirring shaft (601) fixedly connected to the lower end of the transmission shaft (8). A number of transverse stirring rods (602) are fixedly connected to the outer side surface of the stirring shaft (601), and a spiral scraping plate (603) is fixedly connected to the ends of the transverse stirring rods (602) far away from the stirring shaft (601).

3. The stirring device for sludge hydrothermal carbonization according to claim 2, characterized in that: The diameter of the spiral scraping plate (603) is constant, and longitudinal stirring rods (604) are fixedly connected between layers of the spiral scraping plate (603).

4. The stirring device for sludge hydrothermal carbonization according to claim 3, characterized in that: A shaft collar (506) is fixedly connected to the center of the bottom of the isolation kettle (5), and the lower end of the stirring shaft (601) is inserted into the shaft collar (506) to form a rotating pair.

5. The stirring device for sludge hydrothermal carbonization according to claim 4, characterized in that: The upper end of the isolation kettle (5) is provided with an installation bottom cover (501), which is fixedly connected to the frame (3). The driving mechanism includes a matched electric motor (1) and a reducer (2), and the upper end of the transmission shaft (8) is connected to the output end of the reducer (2) through a coupling (7).

6. The stirring device for sludge hydrothermal carbonization according to claim 5, characterized in that: A mechanical seal sleeve (4) is arranged above the installation bottom cover (501). A main shaft hole (502) is formed in the installation bottom cover (501) below the mechanical seal sleeve (4). The transmission shaft (8) passes through the mechanical seal sleeve (4) and is matched with the main shaft hole (502) to form a rotating pair.

7. The stirring device for sludge hydrothermal carbonization according to any one of claims 1 to 6, characterized in that: A fixed disk (503) is arranged on the outer side surface of the isolation kettle (5), and the fixed disk (503) is located above all the convection holes (505). A number of connection holes (504) are formed in the fixed disk (503).

8. The stirring device for sludge hydrothermal carbonization according to any one of claims 5 or 6, characterized in that: The electric motor (1) is located above the reducer (2), and a fan (9) is arranged on the top of the electric motor (1).

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