Sludge low-temperature carbonization device

Abstract

The application discloses a sludge low-temperature carbonization device, which comprises a carbonization tank body, a spiral blade arranged in the carbonization tank body for lifting sludge at the bottom of the carbonization tank body, and a sleeve arranged outside the spiral blade, a mud outlet pipe arranged at the top of the sleeve for conveying the lifted sludge to the inner wall of the carbonization tank body, a stirring motor fixedly installed at the top of the carbonization tank body, and a linkage mechanism arranged at the output end of the stirring motor for linking the spiral blade and the sleeve. The sludge in the unevenly heated area in the carbonization tank body is lifted by the spiral blade and the sleeve, coated on the tank wall through the mud outlet pipe, heated, reciprocally operated, more uniformly heated, and separated from water, and the leakage hole is dredged regularly by the mutually matched dredging assembly and the push rod through the rotation of the sleeve, so that the mud outlet pipe can stably work.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, and in particular to a sludge low-temperature carbonization device. Background Technology

[0002] Sludge is the primary byproduct of wastewater treatment. Its composition is complex, typically containing organic matter, microorganisms, and inorganic particles. Heavy metals and other harmful substances from treated domestic sewage and industrial wastewater are transferred to the sludge. Improper sludge treatment can cause serious ecological damage. Sludge pyrolysis and carbonization is an emerging sludge disposal method. Compared to traditional methods, it offers advantages such as the ability to recover liquid fuel oil, the absence of dioxins and solidified metals, and high resource utilization, making it one of the optimal methods for sludge disposal. Sludge carbonization involves heating and pressurizing the sludge to cause cell lysis, releasing water while maximizing the retention of carbonaceous matter.

[0003] Sludge carbonization can be divided into three modes according to different temperatures and pressures: high-temperature carbonization, medium-temperature carbonization, and low-temperature carbonization. Low-temperature carbonization of sludge does not require drying beforehand. Generally, the sludge is placed directly in the carbonization furnace and the water in the sludge is separated by heating and pressurization. However, existing carbonization furnaces are heated by a heat transfer medium on the outside of the outer shell. A large amount of sludge inside the carbonization furnace accumulates together, which makes it difficult for the sludge to be heated evenly and affects the water separation effect. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings mentioned above by providing a low-temperature carbonization device for sludge, thereby improving the uniformity of sludge heating and accelerating the separation of sludge moisture.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a sludge low-temperature carbonization device, including a carbonization tank body, wherein a spiral blade for lifting sludge at the bottom of the carbonization tank body and a sleeve sleeved outside the spiral blade are rotatably arranged inside the carbonization tank body, and a sludge outlet pipe for conveying the lifted sludge to the inner wall of the carbonization tank body is provided at the top of the sleeve.

[0006] It also includes a stirring motor that is fixedly installed on the top of the carbonization tank, and the output end of the stirring motor is provided with a linkage mechanism for linking the spiral blades and the sleeve.

[0007] Furthermore, the bottom of the mud outlet pipe is provided with multiple water leakage holes, and the cross-sectional area of ​​the end of the mud outlet pipe away from the sleeve is smaller than the cross-sectional area of ​​the end of the mud outlet pipe closer to the sleeve.

[0008] Furthermore, the bottom of the mud discharge pipe is provided with a dredging component for unblocking leaks; the dredging component includes a support plate and a guide rod penetrating the support plate. The support plate has a rhomboid cross-section, and the top of the support plate is provided with a dredging needle corresponding to the position of the leak. The top of the guide rod is fixedly connected to the bottom of the mud discharge pipe, and the bottom of the guide rod is fixedly connected to a limiting block. The radius of the limiting block is larger than the radius of the guide rod, and a return spring located between the mud discharge pipe and the support plate is sleeved on the guide rod.

[0009] The inner wall of the carbonization tank is provided with a push rod for pushing the pallet upward along the guide rod, and the push rod is located within the rotation stroke of the pallet.

[0010] Furthermore, the end of the sludge discharge pipe furthest from the sleeve is equipped with a scraper for scraping sludge off the inner wall of the carbonization tank.

[0011] Furthermore, the linkage mechanism includes a sun gear, multiple planetary gears, and an internal gear ring. The sun gear meshes with the planetary gears, and the planetary gears mesh with the internal gear ring. The sun gear and planetary gears are both located inside the internal gear ring. The two ends of the sun gear's shaft are fixedly connected to the output end of the stirring motor and the top end of the shaft of the spiral blade, respectively. The bottom end of the internal gear ring is fixedly connected to the top end of the sleeve. The top end of the internal gear ring is provided with multiple L-shaped hook plates that are inserted into the carbonization tank. The carbonization tank has an annular groove that matches the size of the L-shaped hook plates.

[0012] Furthermore, the outer peripheral wall of the sludge discharge pipe is provided with stirring blades for stirring the sludge.

[0013] Furthermore, the carbonization tank is equipped with an annular spray pipe for spraying cleaning water.

[0014] The beneficial effects of this invention are reflected in:

[0015] This invention utilizes spiral blades and a sleeve installed inside the carbonization tank to lift sludge from unevenly heated areas within the tank and heat it by coating it onto the tank wall through a sludge discharge pipe. This reciprocating motion makes the sludge heated more evenly and accelerates the separation of water within the sludge. Furthermore, by incorporating a cooperating unblocking component and a push rod, the rotation of the sleeve enables the periodic unblocking of leaks, ensuring the stable operation of the sludge discharge pipe. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 A structural view of the unblocking components;

[0018] Figure 3 This is a structural view of the mud discharge pipe and scraper;

[0019] Figure 4 This is a structural view of the linkage mechanism;

[0020] Figure 5 for Figure 2 A magnified view of a portion of point A shown.

[0021] In the picture:

[0022] 1. Carbonization tank body; 2. Spiral blades; 3. Sleeve; 4. Sludge discharge pipe; 401. Drain hole; 5. Agitator motor; 6. Linkage mechanism; 601. Sun gear; 602. Planetary gear; 603. Internal gear ring; 604. L-shaped hook plate; 7. Unblocking assembly; 701. Support plate; 702. Unblocking needle; 703. Guide rod; 704. Limiting block; 705. Return spring; 8. Push rod; 9. Scraper; 10. Agitator blades; 11. Annular spray pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-5 The present invention discloses a low-temperature carbonization device for sludge, including a carbonization tank body 1. Inside the carbonization tank body 1, there are spiral blades 2 for lifting sludge at the bottom of the carbonization tank body 1 and a sleeve 3 sleeved outside the spiral blades 2. The top of the sleeve 3 is provided with a sludge outlet pipe 4 for conveying the lifted sludge to the inner wall of the carbonization tank body 1.

[0025] It also includes a stirring motor 5 fixedly installed on the top of the carbonization tank 1, and the output end of the stirring motor 5 is provided with a linkage mechanism 6 for linking the spiral blades 2 and the sleeve 3.

[0026] In this invention, the power output from the stirring motor 5 is transmitted to the spiral blades 2 and the sleeve 3 via the linkage mechanism 6, causing the spiral blades 2 and the sleeve 3 to rotate. During the rotation, the spiral blades 2 gradually lift the sludge located at the bottom center of the carbonization tank 1 along the sleeve 3 until it is squeezed and pushed into the sludge discharge pipe 4 for discharge. The sludge discharge pipe 4 rotates with the sleeve 3, so that the sludge in the sludge discharge pipe 4 is coated on the inner wall of the carbonization tank 1 after being squeezed out. Since the carbonization tank requires a certain temperature and pressure during operation, filling it completely will cause excessive pressure and rapid temperature rise, exceeding the safety limit. This allows the sludge coated on the inner wall of the carbonization tank 1 to fully utilize the unfilled area at the top of the carbonization tank 1 for heating, accelerating the separation of sludge moisture.

[0027] Preferably, the height of the spiral blade 2 is higher than the height of the sleeve 3, so that the sleeve 3 is far away from the bottom of the carbonization tank body 1, thus avoiding the sleeve 3 from affecting the normal discharge of sludge.

[0028] In one embodiment, the bottom of the mud discharge pipe 4 is provided with a plurality of water leakage holes 401, and the cross-sectional area of ​​the end of the mud discharge pipe 4 away from the sleeve 3 is smaller than the cross-sectional area of ​​the end of the mud discharge pipe 4 close to the sleeve 3.

[0029] This design allows the moisture contained in the sludge to be discharged through the drain hole 401, and utilizes the change in the cross-sectional area of ​​the sludge discharge pipe 4 to squeeze the sludge, accelerate the discharge of moisture, and make the sludge squeezed out from the sludge discharge pipe 4 more easily adhere to the tank wall.

[0030] In one embodiment, a dredging component 7 for unblocking the leakage hole 401 is provided at the bottom of the mud discharge pipe 4; the dredging component 7 includes a support plate 701 and a guide rod 703 penetrating through the support plate 701. The support plate 701 has a rhomboid cross section. A dredging needle 702 corresponding to the hole position of the leakage hole 401 is provided at the top of the support plate 701. The top end of the guide rod 703 is fixedly connected to the bottom of the mud discharge pipe 4. A limiting block 704 is fixedly connected to the bottom end of the guide rod 703. The radius of the limiting block 704 is larger than the radius of the guide rod 703. A return spring 705 located between the mud discharge pipe 4 and the support plate 701 is sleeved on the guide rod 703.

[0031] The inner wall of the carbonization tank 1 is provided with a push rod 8 for pushing the pallet 701 to move upward along the guide rod 703. The push rod 8 is located within the rotation stroke of the pallet 701.

[0032] This design restricts the support plate 701 to the bottom of the sludge discharge pipe 4 via the guide rod 703 and the limiting block 704. Utilizing the rotation of the sludge discharge pipe 4, when the support plate 701 rotates to contact the push rod 8, the lower inclined surface of the support plate 701 is pushed upwards, causing the unclogging needle 702 to insert into the drain hole 401, pushing out the sludge blocking the drain hole 401 and completing the unclogging of the drain hole 401, ensuring the drainage effect of the drain hole 401. Meanwhile, the sewage dripping from the drain hole 401 can slide down along the inclined surface on the upper side of the support plate 701, reducing residue. When the support plate 701 separates from the push rod 8, under the pressure of the support plate 701's own weight and the push of the return spring 705, the unclogging needle 702 can quickly move out of the drain hole 401.

[0033] In one embodiment, the end of the sludge discharge pipe 4 away from the sleeve 3 is provided with a scraper 9 for scraping sludge from the inner wall of the carbonization tank 1.

[0034] This design utilizes the mud discharge pipe 4 to drive the scraper 9 to rotate together, so that the scraper 9 can scrape off the residual sludge that was coated on the tank wall in the previous round during the rotation process, ensuring the heating effect of the subsequent sludge coating.

[0035] In one embodiment, the linkage mechanism 6 includes a sun gear 601, multiple planetary gears 602, and an internal gear ring 603. The sun gear 601 meshes with the planetary gears 602, and the planetary gears 602 mesh with the internal gear ring 603. The sun gear 601 and the planetary gears 602 are both located inside the internal gear ring 603. The two ends of the shaft of the sun gear 601 are fixedly connected to the output end of the stirring motor 5 and the top end of the shaft of the spiral blade 2, respectively. The bottom end of the internal gear ring 603 is fixedly connected to the top end of the sleeve 3. The top end of the internal gear ring 603 is provided with multiple L-shaped hook plates 604 that are inserted into the carbonization tank body 1. The carbonization tank body 1 has an annular groove that matches the size of the L-shaped hook plates 604.

[0036] This design uses a stirring motor 5 to drive the sun gear 601 to rotate, which in turn drives the spiral blades 2 to rotate, making the speed of the spiral blades 2 the same as the speed of the output of the stirring motor 5. At the same time, the rotation of the sun gear 601 drives the planet gears 602 and the internal gear ring 603 to rotate, and the internal gear ring 603 drives the sleeve 3 to rotate, so that the rotation speed of the sleeve 3 is lower than the rotation speed of the spiral blades 2, ensuring that the sludge coated on the tank wall has enough time to be heated and will not be scraped off the tank wall too quickly.

[0037] In one embodiment, the outer peripheral wall of the sludge discharge pipe 4 is provided with stirring blades 10 for stirring sludge.

[0038] This design allows the sleeve 3 to rotate synchronously with the stirring blades 10, which can stir and mix the sludge at the bottom of the carbonization tank 1, further improving the uniformity of heating of the sludge accumulated at the bottom of the tank.

[0039] In one embodiment, the carbonization tank body 1 is provided with an annular spray pipe 11 for spraying cleaning water.

[0040] This design utilizes the annular spray pipe 11 to spray high-pressure water onto the tank wall of the carbonization tank 1, flushing the tank wall and facilitating regular cleaning by staff.

[0041] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0042] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0043] Additionally, "multiple" refers to two or more.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sludge low-temperature carbonization device, characterized in that: The carbonization tank includes a tank body (1), and a spiral blade (2) for lifting sludge at the bottom of the carbonization tank body (1) and a sleeve (3) sleeved outside the spiral blade (2) are rotatably arranged inside the carbonization tank body (1). The top of the sleeve (3) is provided with a sludge discharge pipe (4) for conveying the lifted sludge to the inner wall of the carbonization tank body (1). It also includes a stirring motor (5) fixedly installed on the top of the carbonization tank body (1), and the output end of the stirring motor (5) is provided with a linkage mechanism (6) for linking the spiral blades (2) and the sleeve (3). The bottom of the mud discharge pipe (4) is provided with multiple water leakage holes (401), and the cross-sectional area of ​​the end of the mud discharge pipe (4) away from the sleeve (3) is smaller than the cross-sectional area of ​​the end of the mud discharge pipe (4) close to the sleeve (3). The bottom of the mud discharge pipe (4) is provided with a dredging component (7) for unblocking the leakage hole (401); the dredging component (7) includes a support plate (701) and a guide rod (703) penetrating the support plate (701). The support plate (701) has a rhomboid cross section. The top of the support plate (701) is provided with a dredging needle (702) corresponding to the hole position of the leakage hole (401). The top of the guide rod (703) is fixedly connected to the bottom of the mud discharge pipe (4). The bottom of the guide rod (703) is fixedly connected to a limiting block (704). The radius of the limiting block (704) is larger than the radius of the guide rod (703). The guide rod (703) is sleeved with a return spring (705) located between the mud discharge pipe (4) and the support plate (701). The inner wall of the carbonization tank (1) is provided with a push rod (8) for pushing the pallet (701) to move upward along the guide rod (703), and the push rod (8) is located within the rotation stroke of the pallet (701). The end of the sludge discharge pipe (4) away from the sleeve (3) is provided with a scraper (9) for scraping sludge from the inner wall of the carbonization tank (1). The outer peripheral wall of the sludge discharge pipe (4) is provided with stirring blades (10) for stirring sludge.

2. The sludge low-temperature carbonization device according to claim 1, characterized in that: The linkage mechanism (6) includes a sun gear (601), multiple planet gears (602) and an internal gear ring (603). The sun gear (601) meshes with the planet gears (602), and the planet gears (602) mesh with the internal gear ring (603). The sun gear (601) and the planet gears (602) are both located inside the internal gear ring (603). The two ends of the shaft of the sun gear (601) are fixedly connected to the output end of the stirring motor (5) and the top end of the shaft of the spiral blade (2), respectively. The bottom end of the internal gear ring (603) is fixedly connected to the top end of the sleeve (3). The top end of the internal gear ring (603) is provided with multiple L-shaped hook plates (604) that are inserted into the carbonization tank body (1). The carbonization tank body (1) is provided with an annular groove that matches the size of the L-shaped hook plates (604).

3. The sludge low-temperature carbonization device according to claim 1, characterized in that: The carbonization tank body (1) is equipped with an annular spray pipe (11) for spraying cleaning water.

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