UASB (upflow anaerobic sludge blanket) sewage treatment device

Abstract

The utility model discloses a UASB (Upflow Anaerobic Sludge Blanket) sewage treatment device which comprises a tank body, a silt discharging cover is arranged outside the bottom side of the tank body in a surrounding manner, a material distribution cone is arranged at the bottom of the tank body, an arch-shaped groove is formed in the bottom of the material distribution cone in a surrounding manner, and the outer side of the arch-shaped groove is connected with the outer side of the bottom of the silt discharging cover through an inclined protective cover; a sliding groove is formed in the silt discharging cover, an annular silt discharging valve is arranged in the sliding groove, and the top of a plurality of hydraulic telescopic rods arranged on the silt discharging cover is connected with the annular silt discharging valve. The sludge discharge device has the advantages that sludge can be diffused outwards after being deposited to a certain degree through the slope, meanwhile, the annular valve controls the size of the sludge discharge opening, the sludge is effectively controlled to be discharged into the sludge discharge groove, the sludge discharge progress is controlled, and the adverse effect on equipment caused by excessive sludge deposition is avoided; the treatment continuity is improved, sludge bed disturbance and reactor stability damage caused by desilting operation are prevented, and the labor cost and the equipment cost of manual desilting are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment, specifically a UASB wastewater treatment device. Background Technology

[0002] Anaerobic wastewater treatment is a low-cost water treatment technology that combines wastewater treatment with energy recovery. Since the 1940s, anaerobic treatment technology has seen significant development, with a breakthrough achieved in 1970 with the development of the Upflow Anaerobic Sludge Bed (UASB) process by Lettinga in the Netherlands. Although anaerobic treatment processes were applied earlier than aerobic processes, the aerobic activated sludge process was more widely used for a long time due to its great success in treating municipal wastewater. In recent years, with the continuous advancement of anaerobic technology, its application areas have become increasingly broad. Compared to aerobic treatment processes, anaerobic treatment has lower costs, lower energy consumption, and is more economical to operate and manage, while also offering higher treatment loads, more flexible equipment, and easier management.

[0003] Bottom clogging is a common problem in UASB (Upflow Anaerobic Sludge Blanket) reactors, usually caused by excessive sludge accumulation during reactor operation, leading to reduced permeability of the bottom sludge bed. This clogging requires regular dredging to maintain normal reactor operation. However, dredging also brings some adverse effects. While necessary, dredging does introduce negative consequences, including increased downtime, sludge bed disturbance, increased operating costs, uneven influent distribution, and unstable hydraulic loads. Therefore, dredging needs to be planned carefully to avoid frequent dredging and to optimize reactor design and operation to reduce the frequency and impact of dredging. For example, employing appropriate sludge removal systems, regularly monitoring sludge accumulation, and designing more efficient flow distribution systems can effectively reduce the adverse effects of bottom clogging on UASB reactor operation. Utility Model Content

[0004] To address the aforementioned shortcomings, this utility model provides the following technical solution:

[0005] A UASB wastewater treatment device includes a tank, a sludge discharge hood surrounding the bottom of the tank, a cloth cone at the bottom of the tank, an arc-shaped groove surrounding the bottom of the cloth cone, the outer side of the arc-shaped groove being connected to the outer side of the bottom of the sludge discharge hood via an inclined protective cover, a sliding groove inside the sludge discharge hood, an annular sludge discharge valve inside the sliding groove, and several hydraulic telescopic rods on the sludge discharge hood having their tops connected to the annular sludge discharge valve.

[0006] Furthermore, the fabric cone is provided above the upward-curving position in the middle of the arc-shaped groove, and the bend at the angle of the upward-curving position in the middle of the arc-shaped groove is beveled to make it continuous with the slope of the fabric cone.

[0007] Furthermore, the sludge discharge cover is an inverted L-shaped structure arranged around the outer side of the bottom of the tank body. The inverted L-shaped structure and the tank body form the sliding groove, and the hydraulic telescopic rod is evenly arranged in a ring at the bottom of the inverted L-shaped structure.

[0008] Furthermore, a water inlet pipe is provided at the axial center of the fabric cone, passing through the middle of the curved section of the bow-shaped groove. Several annular fabric pipes are provided along the slope of the fabric cone from bottom to top. A cross-shaped pipe is provided inside the annular fabric pipe to connect to the water inlet pipe. The inner diameter of the annular fabric pipe decreases sequentially from bottom to top. Several fabric holes are provided on each annular fabric pipe.

[0009] Furthermore, the bottom of the annular sludge discharge valve is provided with an inclined structure that matches the slope of the fabric cone.

[0010] Furthermore, a sludge discharge pipe is provided at the bottom of the bow-shaped groove.

[0011] Furthermore, the top of the tank is provided with several pipes.

[0012] The beneficial effects of this utility model are: 1. By setting up a slope, the sludge will spread outward when it accumulates to a certain extent. At the same time, the annular valve controls the size of the sludge discharge opening, effectively controlling the discharge of sludge into the sludge discharge tank, controlling the discharge progress, and avoiding excessive sludge accumulation from adversely affecting the equipment; 2. It increases the continuity of treatment, prevents sludge bed disturbance and reactor stability damage caused by sludge removal operations, and reduces the labor and equipment costs of manual sludge removal. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the overall internal structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the fabric cone structure of this utility model.

[0016] In the diagram: 1-tank body, 2-sludge discharge hood, 3-material distribution cone, 4-arched groove, 5-protective cover, 6-slide groove, 7-annular sludge discharge valve, 8-hydraulic telescopic rod, 9-water inlet pipe, 10-annular material distribution pipe, 11-cross-shaped pipe, 12-sludge discharge pipe. Detailed Implementation

[0017] 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 protection scope of the present utility model.

[0018] Combination Figures 1 to 3 Shown:

[0019] A UASB wastewater treatment device includes a tank 1. The internal structure of the tank 1 is set according to the conventional UASB wastewater treatment device, so it will not be described in detail here. The bottom structure of the tank 1 is designed according to the structure of this utility model. A sludge discharge cover 2 is arranged around the bottom of the tank 1. A sludge discharge cover 2 is provided inside the sludge discharge cover 2. An annular sludge discharge valve 7 is provided inside the sludge discharge cover 2. Several hydraulic telescopic rods 8 are provided on the sludge discharge cover 2, and the top of the annular sludge discharge valve 7 is connected to the sludge discharge valve 7. The sludge discharge cover 2 is an inverted L-shaped structure arranged around the bottom of the tank 1. The inverted L-shaped structure and the tank 1 form the sludge discharge cover 6. The hydraulic telescopic rods 8 are evenly arranged in a ring at the bottom of the inverted L-shaped structure. The annular sludge discharge valve 7 moves up and down in the sludge discharge cover through the hydraulic telescopic rods 8. To ensure the tightness between the annular sludge discharge valve 7 and the bottom outer side of the tank 1, and to ensure good sealing, a corresponding sealing structure can be set if necessary.

[0020] The tank body 1 has a feeding cone 3 at the bottom. A water inlet pipe 9 is located at the center of the feeding cone 3, passing through the middle of the curved section of the arc-shaped groove 4. Several annular feeding pipes 10 are arranged from bottom to top along the slope of the cone 3. A cross-shaped pipe 11 is provided inside the annular feeding pipe 10, which passes through the feeding cone and connects to the water inlet pipe 9. The inner diameter of the annular feeding pipe 10 decreases from bottom to top to control the water inlet flow and ensure the uniformity of the water sample. Several feeding holes are provided on the annular feeding pipe 10. Sewage is transported from the water inlet pipe 9 through the cross-shaped pipe 11 inside the feeding cone 3 to the annular feeding pipe 10, and enters the tank body 1 through the feeding holes on the annular feeding pipe 10. The height of the bottom annular feeding pipe 10 should be ensured to prevent the accumulated sludge from sliding down and causing blockage.

[0021] The bottom of the material cone 3 is surrounded by an arc-shaped groove 4. The outer side of the arc-shaped groove 4 is connected to the outer side of the bottom of the sludge discharge cover 2 through an inclined protective cover 5. The material distribution cone 3 is set above the upward-curving position in the middle of the arc-shaped groove 4. The bend at the upward-curving position in the middle of the arc-shaped groove 4 is beveled to make it continuous with the slope of the material distribution cone 3, so as to facilitate the sludge to slide down.

[0022] The bottom of the annular sludge discharge valve 7 is provided with a sloping structure that matches the slope of the cloth cone 3, which facilitates the sealing and separation between the arc-shaped groove 4 and the inside of the tank 1.

[0023] The bottom of the bow-shaped trough 4 is equipped with a sludge discharge pipe 12 for cleaning up accumulated sludge, and the top of the tank 1 is equipped with several pipes for various purposes such as venting, drainage, and observation.

[0024] Working principle: Wastewater is transported from the inlet pipe through the cross-shaped pipe inside the cone to the annular distribution pipe. It then enters the tank through the distribution holes on the annular distribution pipe. At this time, the bottom of the annular discharge valve contacts the slope of the cone. After being treated by the treatment mechanism inside the tank, the sludge gradually accumulates on the slope of the cone. When it reaches a certain mass, it slides off the slope. At the same time, the annular discharge valve is opened by controlling the hydraulic telescopic rod. The opening size is controlled according to the sludge accumulation, and the discharge speed is controlled to ensure stable discharge. The sludge enters the arc-shaped trough and can be pumped out through the discharge pipe. The treated water and the generated gas are discharged through the pipe set at the top of the tank.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A UASB wastewater treatment device, characterized in that: The system includes a tank body (1), a sludge discharge hood (2) is arranged around the bottom of the tank body (1), a material distribution cone (3) is provided at the bottom of the tank body (1), an arc-shaped groove (4) is arranged around the bottom of the material distribution cone (3), the outer side of the arc-shaped groove (4) is connected to the outer side of the bottom of the sludge discharge hood (2) by an inclined protective cover (5), a sliding groove (6) is provided inside the sludge discharge hood (2), an annular sludge discharge valve (7) is provided inside the sliding groove (6), and a number of hydraulic telescopic rods (8) are provided on the sludge discharge hood (2) with their tops connected to the annular sludge discharge valve (7).

2. The UASB wastewater treatment device according to claim 1, characterized in that: The fabric cone (3) is set above the upward-curving position in the middle of the bow-shaped groove (4), and the bend at the angle of the upward-curving position in the middle of the bow-shaped groove (4) is set with a chamfer to make it continuous with the slope of the fabric cone (3).

3. The UASB wastewater treatment device according to claim 1, characterized in that: The sludge discharge cover (2) is an inverted L-shaped structure arranged around the bottom outer side of the tank body (1). The inverted L-shaped structure and the tank body (1) form the sliding groove (6). The hydraulic telescopic rod (8) is evenly arranged in a ring at the bottom of the inverted L-shaped structure.

4. The UASB wastewater treatment device according to claim 1, characterized in that: The fabric cone (3) has a water inlet pipe (9) that passes through the middle of the curved section of the bow groove (4) at the axial position. The fabric cone (3) has several annular fabric pipes (10) arranged from bottom to top along the slope of the cone. The annular fabric pipes (10) have a cross-shaped pipe (11) connected to the water inlet pipe (9) on the inner side. The inner diameter of the annular fabric pipes (10) decreases from bottom to top. The annular fabric pipes (10) are provided with several fabric holes.

5. The UASB wastewater treatment device according to claim 1, characterized in that: The bottom of the annular sludge discharge valve (7) is provided with an inclined structure that matches the slope of the fabric cone (3).

6. The UASB wastewater treatment device according to claim 1, characterized in that: The bottom of the bow-shaped groove (4) is provided with a sludge discharge pipe (12).

7. A UASB wastewater treatment device according to claim 1, characterized in that: The top of the tank (1) is provided with several pipes.

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