Sludge carbonization wastewater treatment device

Abstract

The application discloses a sludge carbonization wastewater treatment device and relates to a sludge carbonization device, which comprises an aerobic tank, a scraping plate mechanism is arranged on the top of the aerobic tank and is used for scraping off the foam above the liquid surface, and a defoaming mechanism is arranged on the outer wall of the aerobic tank and is used for collecting and removing the scraped-off foam. The sludge carbonization wastewater treatment device has the advantages that the power supply mechanism is arranged to utilize the natural flow of water in the aerobic tank to generate power, and the power transmission mechanism is arranged to transmit the power to the scraping plate mechanism to drive the scraping plate mechanism to scrape the foam on the liquid surface of the aerobic tank into the defoaming mechanism to eliminate the foam, so that the wastewater treatment of the aerobic tank is completed, the generated foam can be removed in time, no additional power needs to be provided during long-term use, the use cost is low, the energy of the defoaming mechanism for eliminating the foam is the waste heat generated in the sludge carbonization process, the waste gas is cooled, subsequent waste gas treatment is facilitated, energy waste is reduced, and the energy-saving and environment-friendly purposes are achieved.

Description

Technical Field

[0001] This invention relates to the field of sludge carbonization technology, and more particularly to a sludge carbonization wastewater treatment device. Background Technology

[0002] Wastewater discharged from sludge carbonization mainly includes domestic sewage, sludge filter press filtrate, process water tank wastewater, waste gas treatment wastewater, and workshop floor washing wastewater, among which sludge filter press filtrate and waste gas treatment wastewater are the main components, accounting for over 99% of the total wastewater discharge. Waste gas treatment wastewater mainly contains pollutants such as organic nitrogen, ammonia nitrogen, and Cr, requiring treatment through biological treatment equipment. Currently, the mainstream treatment process for ammonia nitrogen wastewater is primarily aerobic treatment. During wastewater treatment in the aerobic tank, various factors (such as excessively high biological activity, oils, and surfactants) can cause a large amount of foam to form above the liquid surface. If not treated promptly, this foam overflow will not only impact the environment but some biological foam may also enter the secondary sedimentation tank, increasing pollutants such as SS and CODcr in the discharged water.

[0003] To address the aforementioned issues, existing technologies generally employ methods such as adding defoamers or breaking up floating bubbles with high-speed water sprays or droplets. While these two methods can resolve the foam overflow problem, defoamers can significantly impact sludge production, and the use of chemical agents can negatively affect the quality of the effluent. Furthermore, defoamers require ongoing purchases, and the high-speed water spray method necessitates a water pump for pressurization, consuming electrical energy. Both methods result in long-term operational costs and high operating costs. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings mentioned above by providing a sludge carbonization wastewater treatment device that achieves low operating costs, energy saving, and environmental protection.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a sludge carbonization wastewater treatment device, involving sludge carbonization equipment, including an aerobic tank, wherein a scraper mechanism for scraping off foam above the liquid surface is provided at the top of the aerobic tank, and a defoaming mechanism for collecting and removing the scraped foam is provided on the outer wall of the aerobic tank; the defoaming mechanism includes a collection box, which is located on the outer wall of the aerobic tank on the side facing the foam discharge direction, and a collection trough is provided at the top of the collection box, wherein a gas guide pipe penetrating the collection box and a return pipe inserted into the aerobic tank are provided in the collection trough, the gas guide pipe is connected to the exhaust gas outlet of the sludge carbonization equipment, and multiple heat-conducting fins are provided on the side of the gas guide pipe near the collection box, the multiple heat-conducting fins being arranged longitudinally at equal intervals;

[0006] It also includes an energy supply mechanism installed inside the aerobic tank to provide rotational power to the scraper mechanism, and a power transmission mechanism installed outside the aerobic tank to transmit power from the energy supply mechanism to the scraper mechanism; the energy supply mechanism includes a partition installed inside the aerobic tank, the partition being flush with the top of the aerobic tank and dividing the inner cavity of the aerobic tank into two bottom-connected chambers, an outlet tank being installed on the side of the partition away from the liquid inlet end of the aerobic tank, the top of the outlet tank being lower than the top of the partition, a settling trough being opened on the top of the outlet tank, and a drain pipe connected to the settling trough and penetrating the aerobic tank being installed at the bottom of the outlet tank, an impeller being rotatably installed inside the settling trough, and the shaft of the impeller being connected to the power transmission mechanism for transmitting power.

[0007] Furthermore, the scraper mechanism includes a belt conveyor installed at the top of the aerobic tank. Multiple fixed frames are installed on the conveyor belt of the belt conveyor. Scrapers are slidably installed outside the fixed frames. A T-shaped block is installed on the side of the scraper near the fixed frame. A groove is opened in the fixed frame for the T-shaped block to slide up and down.

[0008] The baffle is located between the scraper and the water outlet tank.

[0009] Furthermore, the outer wall of the fixed frame is provided with a resistance-increasing zone to slow down the falling speed of the scraper, and the resistance-increasing zone is located on the stroke of the T-block.

[0010] Furthermore, the belt conveyor is equipped with a protective cover to prevent foam overflow, and the gas generated in the aerobic tank is discharged through the gap between the protective cover and the collection box.

[0011] Furthermore, the aerobic tank is equipped with a guide plate for guiding foam into the collection tank. The two ends of the guide plate are located in the aerobic tank and the collection tank, respectively. The end of the guide plate in the aerobic tank is lower than the top of the outlet tank, while the end of the guide plate in the collection tank and the return pipe are both higher than the top of the outlet tank.

[0012] Furthermore, the bottom of the collection trough is inclined, and the height of the bottom of the collection trough on the side away from the aerobic pool is higher than the height of the bottom of the collection trough on the side closer to the aerobic pool.

[0013] Furthermore, the settling tank is equipped with a water guide plate for guiding water flow to impact one side of the impeller, and the water guide plate is located at the top of the impeller.

[0014] Furthermore, the collection box is equipped with a rinsing mechanism on the side away from the aerobic pool to flush away the deposits from the heat-conducting fins.

[0015] Furthermore, the rinsing mechanism includes a water guide pipe disposed on the outer wall of the collection tank, and a plurality of rinsing nozzles communicating with the water guide pipe are disposed on the top of the water guide pipe, with the water outlet of the rinsing nozzles located inside the collection tank.

[0016] The beneficial effects of this invention are reflected in:

[0017] This invention utilizes the natural flow of water in the aerobic tank to generate power through a power supply mechanism. This power is then transmitted to a scraper mechanism via a power transmission mechanism, which in turn scrapes the foam on the surface of the aerobic tank to a defoaming mechanism for elimination. This allows the aerobic tank to remove foam in a timely manner while simultaneously treating wastewater. Furthermore, no additional power is required for long-term use, resulting in low operating costs. The defoaming mechanism uses waste heat generated during sludge carbonization to eliminate foam, thus cooling the waste gas for subsequent treatment and reducing energy waste, achieving energy conservation and environmental protection. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a structural cross-sectional view of the aerobic tank and defoaming mechanism.

[0020] Figure 3 for Figure 2 A magnified view of a portion at point A shown;

[0021] Figure 4 This is a structural cross-sectional view of the power supply mechanism;

[0022] Figure 5 Structural view of the scraper mechanism and power transmission mechanism;

[0023] Figure 6 This is a partial view of the scraper mechanism.

[0024] In the picture:

[0025] 1. Aerobic tank; 2. Scraper mechanism; 21. Belt conveyor; 22. Fixed frame; 221. Slide chute; 23. Scraper; 24. T-block; 3. Defoaming mechanism; 31. Collection box; 311. Collection trough; 32. Air guide pipe; 33. Heat-conducting fins; 34. Return pipe; 4. Power supply mechanism; 41. Baffle plate; 42. Water outlet tank; 421. Settling tank; 43. Drain pipe; 44. Impeller; 5. Power transmission mechanism; 6. Protective cover; 7. Guide plate; 8. Water guide plate; 9. Flushing mechanism; 91. Water guide pipe; 92. Flushing nozzle. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-6 This invention discloses a sludge carbonization wastewater treatment device, which relates to sludge carbonization equipment, including an aerobic tank 1. The top of the aerobic tank 1 is provided with a scraper mechanism 2 for scraping off foam above the liquid surface, and the outer wall of the aerobic tank 1 is provided with a defoaming mechanism 3 for collecting and removing the scraped foam. The defoaming mechanism 3 includes a collection box 31, which is located on the outer wall of the aerobic tank 1 on the side facing the foam discharge direction. The top of the collection box 31 is provided with a collection trough 311, and the collection trough 311 is provided with a gas guide pipe 32 penetrating the collection box 31 and a return pipe 34 inserted into the aerobic tank 1. The gas guide pipe 32 is connected to the exhaust gas outlet of the sludge carbonization equipment. The side of the gas guide pipe 32 near the collection box 31 is provided with multiple heat-conducting fins 33, which are arranged longitudinally at equal intervals.

[0028] It also includes an energy supply mechanism 4 installed inside the aerobic tank 1 to provide rotational power to the scraper mechanism 2, and a power transmission mechanism 5 installed outside the aerobic tank 1 to transmit power from the energy supply mechanism 4 to the scraper mechanism 2. The energy supply mechanism 4 includes a partition 41 installed inside the aerobic tank 1. The partition 41 is flush with the top of the aerobic tank 1 and divides the inner cavity of the aerobic tank 1 into two chambers connected at the bottom. An outlet tank 42 is installed on the side of the partition 41 away from the liquid inlet end of the aerobic tank 1. The top height of the outlet tank 42 is lower than the top height of the partition 41. A settling trough 421 is opened on the top of the outlet tank 42. A drain pipe 43 is installed at the bottom of the outlet tank 42, which is connected to the settling trough 421 and passes through the aerobic tank 1. An impeller 44 is rotatably installed inside the settling trough 421. The shaft of the impeller 44 is connected to the power transmission mechanism 5 to transmit power.

[0029] This invention, by setting up an energy supply mechanism 4 in the aerobic tank 1, allows external sewage to continuously flow into the aerobic tank 1, pushing the treated sewage over the baffle 41 from below. Due to the height difference, the sewage then enters the settling tank 421 and is discharged to the next treatment station through the drain pipe 43. The impeller 44 is driven to rotate by the water flow during the sewage flow, and the power generated is transmitted to the scraper mechanism 2 through the power transmission mechanism 5. The scraper mechanism 2 continuously scrapes the foam above the liquid surface into the collection tank 311. Meanwhile, the high-temperature waste gas generated during the sludge carbonization process continuously flows through the air guide pipe 32, allowing the heat of the waste gas to be transferred to the heat-conducting fins 33 and come into contact with the foam. Due to the increase in temperature, the foam's stability decreases and it breaks down, turning back into water droplets and collecting. Finally, it flows back into the aerobic tank 1 through the drain pipe 43, thus completing the stable removal of foam. At the same time, no additional power is required during the foam removal process, resulting in low operating costs. Furthermore, by utilizing the waste heat generated during the sludge carbonization process to remove foam, energy conservation can be achieved.

[0030] Preferably, the power transmission mechanism 5 consists of a bevel gear, a belt, and a pulley. The rotation direction and transmission ratio are changed by the two bevel gears, and then the input shaft of the scraper mechanism 2 is connected to the output shaft of the bevel gear by the belt and pulley, so that the scraper mechanism 2 rotates synchronously with the bevel gear.

[0031] In one embodiment, the scraper mechanism 2 includes a belt conveyor 21 disposed on the top of the aerobic tank 1. Multiple fixed frames 22 are disposed on the conveyor belt of the belt conveyor 21. Scrapers 23 are slidably disposed outside the fixed frames 22. A T-shaped block 24 is disposed on the side of the scraper 23 near the fixed frame 22. A groove 221 for the T-shaped block 24 to slide up and down is opened in the fixed frame 22.

[0032] The baffle 41 is located between the scraper 23 and the water outlet tank 42.

[0033] This design allows the scraper 23 to slide up and down along the fixed frame 22 via the T-shaped block 24, so that the scraper 23 can fall and extend under the action of gravity during the foam removal process, scraping away as much foam as possible from the water surface.

[0034] Preferably, when the scraper 23 slides down to its limit position, the bottom of the scraper 23 is flush with the top liquid surface of the aerobic tank 1, thereby improving the foam removal effect of a single operation.

[0035] In one embodiment, the outer wall of the fixing frame 22 is provided with a resistance-increasing zone to reduce the falling speed of the scraper 23, and the resistance-increasing zone is located on the stroke of the T-block 24.

[0036] This design reduces the sliding speed of the scraper 23 by increasing the resistance zone, thereby avoiding the problem of the scraper 23 falling too fast and causing noise and damage.

[0037] In one embodiment, a protective cover 6 is provided outside the belt conveyor 21 to prevent foam overflow, and the gas generated in the aerobic tank 1 is discharged through the gap between the protective cover 6 and the collection box 31.

[0038] This design prevents foam from overflowing through the protective cover 6. Foam that is not treated in time is pushed and rotated once along with the movement of the scraper 23, and then enters the collection tank 311 again for defoaming treatment. Furthermore, the thrust generated when the gas inside the aerobic tank 1 is discharged to the outside can be used to push the bubbles to fully contact the heat-conducting fins 33, thereby improving the foam elimination effect.

[0039] Preferably, the scraper 23 is inclined on both sides of the belt conveyor 21 in the direction of movement, so that the scraper 23 can be pushed back more easily after being blocked by the protective cover 6.

[0040] In one embodiment, an aerobic tank 1 is provided with a guide plate 7 for guiding foam into the collection tank 311. The two ends of the guide plate 7 are located in the aerobic tank 1 and the collection tank 311, respectively. The end of the guide plate 7 in the aerobic tank 1 is lower than the top of the outlet tank 42, while the end of the guide plate 7 in the collection tank 311 and the return pipe 34 are both higher than the top of the outlet tank 42.

[0041] This design guides the scraped foam into the collection tank 311 via the guide plate 7, while preventing the wastewater in the aerobic tank 1 from being pushed into the collection tank 311, thus affecting the removal of foam by the heat-conducting fins 33.

[0042] In one embodiment, the bottom of the collection tank 311 is inclined, and the height of the bottom of the collection tank 311 on the side away from the aerobic tank 1 is higher than the height of the bottom of the collection tank 311 on the side close to the aerobic tank 1.

[0043] This design allows the wastewater in the collection tank 311 to flow towards the return pipe 34 under the action of gravity, so that the wastewater can be returned to the aerobic tank 1 in a timely manner.

[0044] In one embodiment, a guide plate 8 is provided in the settling tank 421 to guide the water flow to impact one side of the impeller 44, and the guide plate 8 is located on the top of the impeller 44.

[0045] This design ensures that the treated water entering from each side of the settling tank 421 only impacts one side of the impeller 44, ensuring that the impeller 44 can maintain rotation in one direction for a long time, thus avoiding the problem of the belt conveyor 21 driving the scraper 23 to rotate in the opposite direction, which would affect the foam removal efficiency.

[0046] In one embodiment, a flushing mechanism 9 for flushing the deposited material away from the heat-conducting fins 33 is provided on the side of the collection box 31 away from the aerobic pool 1.

[0047] This design allows the rinsing mechanism 9 to periodically spray water to flush away any adhering substances from the heat-conducting fins 33, ensuring the heat transfer efficiency of the heat-conducting fins 33.

[0048] Preferably, the water source for the rinsing mechanism 9 is the effluent from the sludge carbonization wastewater after treatment by the water treatment equipment, which can reduce the waste of natural water resources.

[0049] In one embodiment, the rinsing mechanism 9 includes a water guide pipe 91 disposed on the outer wall of the collection tank 31, and a plurality of rinsing nozzles 92 communicating with the water guide pipe 91 are disposed on the top of the water guide pipe 91, with the water outlet of the rinsing nozzles 92 located inside the collection tank 311.

[0050] This design reduces the risk of foam overflowing from the spray nozzle 92.

[0051] 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.

[0052] 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.

[0053] Additionally, "multiple" refers to two or more.

[0054] 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 carbonization wastewater treatment device, relating to sludge carbonization equipment, characterized in that: The system includes an aerobic tank (1), a scraper mechanism (2) for scraping foam off the surface of the liquid is provided on the top of the aerobic tank (1), and a defoaming mechanism (3) for collecting and removing the scraped foam is provided on the outer wall of the aerobic tank (1). The defoaming mechanism (3) includes a collection box (31), which is located on the outer wall of the aerobic tank (1) on the side facing the direction of foam discharge. A collection trough (311) is provided on the top of the collection box (31). A gas guide pipe (32) penetrating the collection box (31) and a return pipe (34) inserted into the aerobic tank (1) are provided in the collection trough (311). The gas guide pipe (32) is connected to the exhaust gas outlet of the sludge carbonization equipment. Multiple heat-conducting fins (33) are provided on the side of the gas guide pipe (32) near the collection box (31). The multiple heat-conducting fins (33) are arranged longitudinally at equal intervals. It also includes a power supply mechanism (4) disposed within the aerobic tank (1) to provide rotational power to the scraper mechanism (2), and a power transmission mechanism (5) disposed outside the aerobic tank (1) to transmit power from the power supply mechanism (4) to the scraper mechanism (2); the power supply mechanism (4) includes a partition (41) disposed within the aerobic tank (1), the partition (41) being flush with the top of the aerobic tank (1), and the partition (41) dividing the inner cavity of the aerobic tank (1) into two bottom-connected chambers, the partition (41) 41) An outlet tank (42) is provided on the side away from the liquid inlet of the aerobic tank (1). The top of the outlet tank (42) is lower than the top of the partition (41). A settling trough (421) is provided on the top of the outlet tank (42). A drain pipe (43) is provided at the bottom of the outlet tank (42) that communicates with the settling trough (421) and passes through the aerobic tank (1). An impeller (44) is rotatably installed in the settling trough (421). The shaft of the impeller (44) is connected to the power transmission mechanism (5) for transmitting power.

2. The sludge carbonization wastewater treatment device according to claim 1, characterized in that: The scraper mechanism (2) includes a belt conveyor (21) installed at the top of the aerobic tank (1). Multiple fixed frames (22) are installed on the conveyor belt of the belt conveyor (21). Scrapers (23) are slidably installed on the fixed frames (22). A T-shaped block (24) is installed on the side of the scraper (23) close to the fixed frame (22). A groove (221) for the T-shaped block (24) to slide up and down is opened in the fixed frame (22). The baffle (41) is located between the scraper (23) and the water outlet tank (42).

3. The sludge carbonization wastewater treatment device according to claim 2, characterized in that: The outer wall of the fixed frame (22) is provided with a resistance-increasing zone to reduce the falling speed of the scraper (23), and the resistance-increasing zone is located on the stroke of the T-block (24).

4. The sludge carbonization wastewater treatment device according to claim 2, characterized in that: The belt conveyor (21) is provided with a protective cover (6) to prevent foam from overflowing. The gas generated in the aerobic tank (1) is discharged through the gap between the protective cover (6) and the collection box (31).

5. The sludge carbonization wastewater treatment device according to claim 1, characterized in that: The aerobic tank (1) is equipped with a guide plate (7) for guiding foam into the collection tank (311). The two ends of the guide plate (7) are located in the aerobic tank (1) and the collection tank (311) respectively. The end of the guide plate (7) in the aerobic tank (1) is lower than the top of the outlet tank (42), while the end of the guide plate (7) in the collection tank (311) and the return pipe (34) are both higher than the top of the outlet tank (42).

6. The sludge carbonization wastewater treatment device according to claim 1, characterized in that: The bottom of the collection trough (311) is inclined, and the height of the bottom of the collection trough (311) away from the aerobic pool (1) is higher than the height of the bottom of the collection trough (311) close to the aerobic pool (1).

7. The sludge carbonization wastewater treatment device according to claim 1, characterized in that: The settling tank (421) is provided with a water guide plate (8) for guiding water flow to impact one side of the impeller (44), and the water guide plate (8) is located on the top of the impeller (44).

8. The sludge carbonization wastewater treatment device according to claim 1, characterized in that: The collection box (31) is equipped with a flushing mechanism (9) on the side away from the aerobic pool (1) to flush off the attached material from the heat-conducting fins (33).

9. The sludge carbonization wastewater treatment device according to claim 8, characterized in that: The rinsing mechanism (9) includes a water guide pipe (91) disposed on the outer wall of the collection tank (31). The top of the water guide pipe (91) is provided with a plurality of rinsing nozzles (92) communicating with the water guide pipe (91). The water outlet of the rinsing nozzles (92) is located in the collection tank (311).

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