hydrolysis acidification tank

Abstract

The utility model provides a kind of hydrolytic acidification pool, hydrolytic acidification pool includes pool body and water distribution and sludge discharge pipeline system, water distribution and sludge discharge pipeline system includes water distribution pipeline component and sludge discharge pipeline component. Water distribution pipeline component is arranged in the inside of pool body. Sludge discharge pipeline component is arranged in the inside of pool body and is located above water distribution pipeline component. Sludge discharge pipeline component includes bottom sludge discharge pipe and mid-position sludge discharge pipe. The distance between the top surface of bottom sludge discharge pipe and the bottom surface of the inner cavity of pool body is H1, 0.3m≤H1≤0.5m, the distance between the top surface of mid-position sludge discharge pipe and the bottom surface of the inner cavity of pool body is H2, 2.4m≤H2≤2.7m. According to the hydrolytic acidification pool of the utility model, bottom sludge discharge pipe and mid-position sludge discharge pipe can effectively discharge aging sludge in pool body, ensure sludge activity in pool body, so as to ensure water treatment reaction efficiency and stability in pool body.

Description

Technical Field

[0001] This utility model relates generally to the technical field of water treatment, and more specifically to a hydrolysis acidification tank. Background Technology

[0002] Hydrolysis acidification tanks are a commonly used biological pretreatment technology in wastewater treatment. They are a process unit between aerobic and anaerobic treatment (methanogenesis). Their core function is to convert recalcitrant large organic molecules into easily degradable small organic molecules under anoxic or anaerobic conditions, thereby significantly improving the biodegradability of wastewater.

[0003] Currently, common types of hydrolysis acidification tanks mainly include upflow sludge blankets, composite sludge blankets, and completely mixed sludge blankets. Taking upflow sludge blankets as an example, in the tank structure, the water distribution system is the core component that promotes uniform mixing of wastewater and sludge entering the tank, improving mass transfer and reaction efficiency; the sludge removal system is the key component that maintains the activity and balance of the microbial community within the tank, ensuring the long-term stable operation of the system. Existing hydrolysis acidification tanks suffer from drawbacks such as uneven water distribution, poor sludge-water mixing, pipe blockage, and easy aging of activated sludge, resulting in poor system reaction efficiency and stability.

[0004] Therefore, there is a need to provide a hydrolysis acidification tank to at least partially solve the above problems. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, this utility model provides a hydrolysis acidification tank, which includes a tank body and a water distribution and sludge discharge pipeline system, the water distribution and sludge discharge pipeline system including: Water distribution piping assembly, wherein the water distribution piping assembly is disposed inside the pool body; and A sludge discharge pipeline assembly is disposed inside the pool body and above the water distribution pipeline assembly. The sludge discharge pipeline assembly includes a bottom sludge discharge pipe and a middle sludge discharge pipe. The distance between the top surface of the bottom sludge discharge pipe and the bottom surface of the inner cavity of the pool body is H1, 0.3m≤H1≤0.5m, and the distance between the top surface of the middle sludge discharge pipe and the bottom surface of the inner cavity of the pool body is H2, 2.4m≤H2≤2.7m.

[0007] Optionally, the hydrolysis acidification tank further includes a vertical shaft and a sludge tank, and the water distribution pipeline assembly includes: A main pipe, one end of which is connected to the vertical shaft, and the other end of which extends away from the vertical shaft to the outside of the pool body and communicates with the sludge pool; and Multiple branch pipes are provided along a first horizontal direction and connected to the main pipe.

[0008] Optionally, the supervisor includes: A vertical pipe, wherein the vertical pipe is arranged along the first horizontal direction and is connected to the vertical shaft; and A horizontal tube is provided along a second horizontal direction, which is perpendicular to the first horizontal direction, and the horizontal tube is connected to the vertical tube; One end of the horizontal pipe is connected to a drain pipe, which extends to the outside of the pool body and communicates with the sludge pool.

[0009] Optionally, the branch pipes are arranged in pairs, with the two branch pipes in a pair spaced apart along the first horizontal direction; and / or Along a second horizontal direction perpendicular to the first horizontal direction, there are multiple branch pipes, and the multiple branch pipes are spaced apart along the second horizontal direction.

[0010] Optionally, the shaft is arranged vertically, and the shaft is at least partially located inside the pool body, while the sludge pool is located outside the pool body. Both the water distribution pipeline assembly and the sludge discharge pipeline assembly are connected to the vertical shaft.

[0011] Optionally, the hydrolysis acidification tank further includes: A water distribution trough is located at the top of the pool body and connected to the vertical shaft; An inlet pipe, one end of which is connected to the distribution tank, and the other end of which, away from the distribution tank, is used to connect to the wastewater to be treated; and A water collection tank is provided outside the pool body and connected to the pool body.

[0012] Optionally, the vertical shaft is connected to the water distribution tank and the water distribution pipeline assembly, and the vertical shaft, the water distribution tank and the water distribution pipeline assembly are all centrally symmetrically distributed from top to bottom.

[0013] Optionally, the sludge discharge pipeline assembly has multiple sludge discharge holes that connect the interior and exterior of the sludge discharge pipeline assembly.

[0014] Optionally, the sludge discharge pipeline assembly satisfies at least one of the following conditions: The angle between the axis of the mud discharge hole and the vertical direction is in the range of 55°-60°; The diameter of the sludge discharge hole accounts for 10%-16% of the diameter of the sludge discharge pipeline assembly; Along the extending direction of the sludge discharge pipe assembly, the distance between two adjacent sludge discharge holes is 200mm-300mm; and Along the extension direction of the sludge discharge pipe assembly, two adjacent sludge discharge holes are located on different sides of the sludge discharge pipe assembly.

[0015] Optionally, the hydrolysis acidification tank further includes a vertical shaft. The water distribution and sludge discharge pipeline system further includes a fixing component, which is connected to the sludge discharge pipeline component. The fixing component includes: A support frame, connected to the shaft and / or the pool body; and Pipe clamps are connected to the brackets so that the sludge discharge pipeline assembly is clamped between the pipe clamps and the brackets.

[0016] According to the hydrolysis acidification tank of this utility model, the bottom sludge discharge pipe and the middle sludge discharge pipe can effectively discharge the aged sludge in the tank, ensure the activity of the sludge in the tank, and thus ensure the efficiency and stability of the water treatment reaction in the tank. Attached Figure Description

[0017] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings, Figure 1 This is a cross-sectional schematic diagram of a hydrolysis acidification tank according to a preferred embodiment of the present invention, wherein the cross-sectional plane is perpendicular to the horizontal direction; Figure 2 for Figure 1 A top view of the hydrolysis acidification tank is shown; and Figure 3 For along Figure 1 A cross-sectional view of the section cut by line AA.

[0018] Explanation of reference numerals in the attached figures: 100 Hydrolysis Acidification Tank 111 pool Shaft 112 113 Sludge Tank 114 water distribution tank 115 Outlet Water Collection Tank 116 Inner cavity 117 water inlet pipe 120 water distribution and sludge discharge pipeline system 130 water distribution pipeline assembly Supervisor 131 132 vertical pipe 133 horizontal tube 134 branch pipe 135 vent pipe 140 mud discharge pipeline assembly 141 Bottom Sludge Discharge Pipe 142 Mid-position Sludge Discharge Pipe 143 control valve 144 mud holes 150 Fixing Components 151 bracket 152 First fixed component 153 Second fixed component 154 pipe clamp 155 Fasteners D1 First horizontal direction D2 Second Horizontal Direction DH vertical direction Detailed Implementation

[0019] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0020] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art.

[0021] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the invention. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0022] The ordinal numbers such as "first" and "second" used in this utility model are merely identifiers and do not have any other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of a "second component," and the term "second component" does not imply the existence of a "first component." It should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and similar expressions used in this utility model are for illustrative purposes only and are not intended to be limiting.

[0023] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, which show representative embodiments of the present invention and are not intended to limit the present invention.

[0024] This utility model provides a hydrolysis acidification tank.

[0025] Please see Figure 1 The hydrolysis acidification tank 100 includes a tank body 111 and a water distribution and sludge discharge piping system 120. The water distribution and sludge discharge piping system 120 includes a water distribution piping assembly 130 and a sludge discharge piping assembly 140. The water distribution piping assembly 130 is located inside the tank body 111. The sludge discharge piping assembly 140 is located inside the tank body 111 and above the water distribution piping assembly 130. The sludge discharge piping assembly 140 includes a bottom sludge discharge pipe 141 and a middle sludge discharge pipe 142. It should be noted that the distance between the top surface of the bottom sludge discharge pipe 141 and the bottom surface of the inner cavity 116 of the tank body 111 is H1, 0.3m ≤ H1 ≤ 0.5m. The distance between the top surface of the middle sludge discharge pipe 142 and the bottom surface of the inner cavity 116 of the tank body 111 is H2, 2.4m ≤ H2 ≤ 2.7m.

[0026] According to the hydrolysis acidification tank 100 of this scheme, the bottom sludge discharge pipe 141 and the middle sludge discharge pipe 142 can effectively discharge the aged sludge in the tank body 111, ensuring the activity of the sludge in the tank body 111, thereby ensuring the efficiency and stability of the water treatment reaction in the tank body 111.

[0027] Please continue reading. Figure 1 The hydrolysis acidification tank 100 also includes a shaft 112 and a sludge tank 113. Specifically, the shaft 112 is vertical along the vertical direction DH. The shaft 112 is at least partially located inside the tank body 111. The sludge tank 113 is located outside the tank body 111. It should be noted that both the water distribution pipeline assembly 130 and the sludge discharge pipeline assembly 140 are connected to the shaft 112.

[0028] Please see now Figure 1 and Figure 2Furthermore, the water distribution pipeline assembly 130 includes a main pipe 131 and multiple branch pipes 134. One end of the main pipe 131 is connected to a vertical shaft 112, and the other end of the main pipe 131, away from the vertical shaft 112, extends to the outside of the tank body 111 and communicates with the sludge tank 113. The branch pipes 134 are arranged along a first horizontal direction D1 and connected to the main pipe 131. More specifically, the main pipe 131 includes a vertical pipe 132 and a horizontal pipe 133. The vertical pipe 132 is arranged along the first horizontal direction D1 and is connected to the vertical shaft 112. The horizontal pipe 133 is arranged along a second horizontal direction D2. The second horizontal direction D2 is perpendicular to the first horizontal direction D1. The horizontal pipe 133 is connected to the vertical pipe 132. It should be noted that one end of the horizontal pipe 133 is connected to a drain pipe 135, which extends to the outside of the tank body 111 and communicates with the sludge tank 113. It is understandable that the bottom sludge discharge pipe 141, the middle sludge discharge pipe 142 and the empty pipe 135 are all equipped with corresponding control valves 143 to control the opening and closing of the corresponding pipes.

[0029] Figure 2 In the middle, branch pipes 134 are arranged in pairs, and the two branches 134 in a pair are spaced apart along the first horizontal direction D1. Along the second horizontal direction D2, there are multiple branches 134, and the multiple branches 134 are spaced apart along the second horizontal direction D2.

[0030] Please return to the reference section. Figure 1 The hydrolysis acidification tank 100 also includes a water distribution tank 114, an inlet pipe 117, and an outlet water collection tank 115. The water distribution tank 114 is located at the top of the tank body 111 and connected to the vertical shaft 112. One end of the inlet pipe 117 is connected to the water distribution tank 114, and the other end of the inlet pipe 117 away from the water distribution tank 114 is used to connect to the wastewater to be treated. The outlet water collection tank 115 is located outside the tank body 111 and connected to the tank body 111. It should be noted that the vertical shaft 112 is connected to the water distribution tank 114 and the water distribution pipe assembly 130. Preferably, the vertical shaft 112, the water distribution tank 114, and the water distribution pipe assembly 130 are all centrally symmetrically distributed from top to bottom.

[0031] Please see now Figures 1 to 3 The sludge discharge pipe assembly 140 has multiple sludge discharge holes 144 that connect the interior and exterior of the sludge discharge pipe assembly 140.

[0032] Sludge discharge pipeline assembly 140 meets at least one of the following conditions: The angle between the axis of the mud discharge hole 144 and the vertical direction DH is in the range of 55°-60° (including the endpoint value).

[0033] The diameter of the sludge discharge hole 144 accounts for 10%-16% of the diameter of the sludge discharge pipe assembly 140 (including the end values).

[0034] Along the extending direction of the sludge discharge pipeline assembly 140, the distance between two adjacent sludge discharge holes 144 is 200mm-300mm.

[0035] Along the extending direction of the sludge discharge pipeline assembly 140, two adjacent sludge discharge holes 144 are located on different sides of the sludge discharge pipeline assembly 140.

[0036] Preferably, the sludge discharge pipeline assembly 140 satisfies the above four conditions.

[0037] For example, the aperture of the sludge discharge hole 144 is 20mm; along the extending direction of the sludge discharge pipeline assembly 140, the distance between two adjacent sludge discharge holes 144 is 250mm; the included angle between the axis of the sludge discharge hole 144 and the vertical direction DH is 55°.

[0038] Please now refer to Figure 1 and Figure 3 , the water distribution and sludge discharge pipeline system 120 further comprises a fixing assembly 150, and the fixing assembly 150 is connected to the sludge discharge pipeline assembly 140. Specifically, the fixing assembly 150 comprises a bracket 151 and a pipe clamp 154. The bracket 151 is connected to the vertical shaft 112 and / or the tank body 111. Figure 1 there are brackets 151 connected to the vertical shaft 112, and there are brackets 151 connected to the tank body 111. Further, the pipe clamp 154 is connected to the bracket 151, so that the sludge discharge pipeline assembly 140 is clamped between the pipe clamp 154 and the bracket 151.

[0039] Figure 3 the bracket 151 comprises a first fixing member 152 and a second fixing member 153 connected to each other, and the second fixing member 153 is located below the first fixing member 152. For example, the first fixing member 152 is configured as an angle iron, and the second fixing member 153 is configured as a channel steel. The pipe clamp 154 is connected to the first fixing member 152 by a fastener 155 (for example, a combination of an expansion bolt and a nut). It can be understood that the first fixing member 152 is provided with a mounting hole suitable for the expansion bolt.

[0040] The water treatment process is described below.

[0041] Sewage from a chemical plant enters the water distribution tank 114 at the tank body 111 through the water inlet pipeline 117, so as to achieve the effects of regulating water pressure, and homogenizing water quality and quantity. Then the sewage is injected into the vertical shaft 112. The bottom of the vertical shaft 112 is provided with a baffle plate, which guides the sewage to flow out from the water distribution pipeline assembly 130 at the bottom of the vertical shaft 112. The water distribution pipeline assembly 130 is arranged in a "king" shape through embedded parts (see Figure 2 ) and evenly covers the bottom of the tank body 111, so as to optimize the hydraulic flow state and ensure the uniformity of water distribution.

[0042] After continuous water intake and operation for a period of time, pool 111 will naturally form a stable biological phase stratification structure. Taking the upflow pool 111 as an example, it is divided into three layers from top to bottom: a clear water layer (0.8~1.2 meters), a suspended layer (1.0~2.0 meters), and a sludge layer (1.5~3.0 meters). The average sludge concentration in the sludge layer is maintained at 15~25 g / L. During the hydrolysis and acidification reaction, an appropriate concentration range must be maintained to ensure sufficient sludge-water contact and reaction efficiency. The sludge discharge pipeline assembly 140 is a static pressure perforated pipe with dual-point sludge discharge. The bottom sludge discharge pipe 141 is used to discharge inert inorganic particles from the influent deposited at the bottom of the pool, as well as inorganic precipitates formed during the hydrolysis and acidification process, to prevent sludge accumulation and blockage. The middle sludge discharge pipe 142 is used to discharge aged flocculent sludge with poor settling performance and reduced activity, in order to maintain sludge activity.

[0043] In actual sludge discharge operation, the control valves 143 at the bottom sludge discharge pipe 141 and the middle sludge discharge pipe 142 are opened to discharge the sludge in the tank 111 to the sludge tank 113, so as to achieve the effect of regulating the sludge concentration and sludge layer height.

[0044] When the tank 111 needs to be emptied and flushed, stop the water intake and open the control valve 143 at the drain pipe 135 to discharge the impurities in the water distribution pipeline assembly 130 along with the sewage. After emptying, close the control valve 143, introduce flushing medium to thoroughly flush the tank body and the water distribution pipeline assembly 130, and finally open the control valve 143 again to drain the flushing wastewater.

[0045] The hydrolysis acidification tank of this utility model can achieve uniform water distribution, while controlling the sludge concentration, avoiding blockage of the water distribution pipeline components, and ensuring full mixing of activated sludge and sewage in the tank.

[0046] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0047] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A hydrolysis acidification tank, characterized in that, The hydrolysis acidification tank includes a tank body and a water distribution and sludge discharge pipeline system, wherein the water distribution and sludge discharge pipeline system includes: Water distribution piping assembly, wherein the water distribution piping assembly is disposed inside the pool body; and A sludge discharge pipeline assembly is disposed inside the pool body and above the water distribution pipeline assembly. The sludge discharge pipeline assembly includes a bottom sludge discharge pipe and a middle sludge discharge pipe. The distance between the top surface of the bottom sludge discharge pipe and the bottom surface of the inner cavity of the pool body is H1, 0.3m≤H1≤0.5m, and the distance between the top surface of the middle sludge discharge pipe and the bottom surface of the inner cavity of the pool body is H2, 2.4m≤H2≤2.7m.

2. The hydrolysis acidification tank according to claim 1, characterized in that, The hydrolysis acidification tank also includes a vertical shaft and a sludge tank, and the water distribution pipeline assembly includes: A main pipe, one end of which is connected to the vertical shaft, and the other end of which extends away from the vertical shaft to the outside of the pool body and communicates with the sludge pool; and Multiple branch pipes are provided along a first horizontal direction and connected to the main pipe.

3. The hydrolysis acidification tank according to claim 2, characterized in that, The supervisors include: A vertical pipe, wherein the vertical pipe is arranged along the first horizontal direction and is connected to the vertical shaft; and A horizontal tube is provided along a second horizontal direction, which is perpendicular to the first horizontal direction, and the horizontal tube is connected to the vertical tube; One end of the horizontal pipe is connected to a drain pipe, which extends to the outside of the pool body and communicates with the sludge pool.

4. The hydrolysis acidification tank according to claim 2, characterized in that, The branch pipes are arranged in pairs, with the two branch pipes in a pair spaced apart along the first horizontal direction; and / or Along a second horizontal direction perpendicular to the first horizontal direction, there are multiple branch pipes, and the multiple branch pipes are spaced apart along the second horizontal direction.

5. The hydrolysis acidification tank according to claim 2, characterized in that, The vertical shaft is arranged vertically and is at least partially located inside the pool body, while the sludge pool is located outside the pool body. Both the water distribution pipeline assembly and the sludge discharge pipeline assembly are connected to the vertical shaft.

6. The hydrolysis acidification tank according to claim 5, characterized in that, The hydrolysis acidification tank also includes: A water distribution trough is located at the top of the pool body and connected to the vertical shaft; An inlet pipe, one end of which is connected to the distribution tank, and the other end of which, away from the distribution tank, is used to connect to the wastewater to be treated; and A water collection tank is provided outside the pool body and connected to the pool body.

7. The hydrolysis acidification tank according to claim 6, characterized in that, The vertical shaft is connected to the water distribution tank and the water distribution pipeline assembly. The vertical shaft, the water distribution tank and the water distribution pipeline assembly are all centrally symmetrically distributed from top to bottom.

8. The hydrolysis acidification tank according to claim 1, characterized in that, The sludge discharge pipeline assembly has multiple sludge discharge holes that connect the interior and exterior of the sludge discharge pipeline assembly.

9. The hydrolysis acidification tank according to claim 8, characterized in that, The sludge discharge pipeline assembly satisfies at least one of the following conditions: The angle between the axis of the mud discharge hole and the vertical direction is in the range of 55°-60°; The diameter of the sludge discharge hole accounts for 10%-16% of the diameter of the sludge discharge pipeline assembly; Along the extending direction of the sludge discharge pipe assembly, the distance between two adjacent sludge discharge holes is 200mm-300mm; and Along the extension direction of the sludge discharge pipe assembly, two adjacent sludge discharge holes are located on different sides of the sludge discharge pipe assembly.

10. The hydrolysis acidification tank according to claim 1, characterized in that, The hydrolysis acidification tank also includes a vertical shaft. The water distribution and sludge discharge pipeline system further includes a fixing component, which is connected to the sludge discharge pipeline component. The fixing component includes: A support frame, connected to the shaft and / or the pool body; and Pipe clamps are connected to the brackets so that the sludge discharge pipeline assembly is clamped between the pipe clamps and the brackets.

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