Hydrolysis acidification pool of hydrolysis sludge interception assembly

Abstract

The utility model relates to the technical field of wastewater biochemical treatment, in particular to a hydrolysis acidification pool of a hydrolysis sludge interception assembly, which comprises a hydrolysis acidification pool body and the sludge interception assembly, a water inlet pipeline is arranged in the hydrolysis acidification pool body, a stirring device is arranged in the hydrolysis acidification pool body, and the sludge interception assembly is arranged in the hydrolysis acidification pool body. The upper part in the hydrolysis acidification pool body is connected with a sludge interception assembly, a plurality of groups of inclined parts are arranged in the middle area of the sludge interception assembly, buffer areas are arranged below and above the inclined parts, a water collecting tank is arranged above the sludge interception assembly, the water collecting tank is provided with an adjustable overflow weir, and the adjustable overflow weir is provided with a water inlet and a water outlet. Effluent of the water collecting tank is discharged through a water outlet pipeline, a flushing device is arranged at the lower part of the sludge interception assembly, and the sludge interception assembly is arranged on a bracket in the hydrolysis acidification pool.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater biochemical treatment, in particular to a hydrolysis acidification tank with a hydrolysis sludge interception component. Background Technique

[0002] A hydrolysis acidification reactor refers to a sewage treatment device that controls anaerobic biological reactions in the hydrolysis and acidification stages. By utilizing the functions of anaerobic or facultative bacteria in the hydrolysis and acidification stages, suspended organic solids and difficult-to-biodegrade macromolecular substances (including carbohydrates, fats, and lipids, etc.) in sewage are hydrolyzed into soluble organic substances and easily biodegradable small-molecular substances, and then the small-molecular organic substances are converted into volatile fatty acids under the action of acidifying bacteria. Therefore, it takes into account the removal of suspended solids and COD and the improvement of the biodegradability of sewage.

[0003] There are three common hydrolysis acidification processes: upflow hydrolysis reactor, composite hydrolysis reactor, and completely mixed hydrolysis reactor. The upflow and composite types achieve hydraulic agitation through the influent distribution pipe, and the effluent is weir flow, without the need to set up agitation devices, and they have a high sludge concentration and a small floor area. However, they are not very suitable for projects with a large influent water volume, high suspended solids, and the renovation of existing pool bodies. A stirring device is set in the completely mixed reactor to completely mix the sewage and sludge. The effluent is a mixture of mud and water, and a sedimentation tank needs to be connected later for mud-water separation and sludge reflux to maintain the sludge concentration in the hydrolysis acidification tank. It is widely used in projects with a high suspended solid concentration, large water volume, and renovation projects in the influent.

[0004] Since the sludge concentration in the completely mixed hydrolysis acidification tank is generally 4 - 8 mg / L, a longer residence time needs to be set, and a sedimentation tank is required, resulting in a relatively large overall floor area, and there are great limitations for the renovation projects of existing pool bodies.

[0005] In the field of industrial wastewater treatment, hydrolysis acidification is widely used as a pretreatment process for biochemical treatment, and it has a significant effect on improving the biodegradability of wastewater, removing COD and suspended solids, and reducing the biochemical sludge load at the back end. Different reactor types are configured according to different influent water components and site requirements in the application. Among them, the completely mixed reactor has advantages in renovation projects, projects with a high influent suspended solid content, and large water volume projects, but it is limited by its large floor area and energy consumption, causing many inconveniences to the project implementation.

[0006] Therefore, it is necessary to design a hydrolysis acidification tank with a hydrolysis sludge interception component to solve the problems in the above background technique. Content of the Utility Model

[0007] The purpose of the utility model is to solve the problems in the prior art, and a hydrolysis acidification tank with a hydrolysis sludge interception component is proposed.

[0008] To achieve the above object, the present utility model provides the following technical solutions:

[0009] An acidification tank with a hydrolysis sludge interception component, comprising an acidification tank body and a sludge interception component, wherein the upper part inside the acidification tank body is connected with the sludge interception component;

[0010] An inlet pipe is provided inside the acidification tank body, a stirring device is provided inside the acidification tank body, the upper part inside the acidification tank body is connected with the sludge interception component, a plurality of inclined members are arranged in the middle area of the sludge interception component, buffer areas are provided below and above the inclined members, a water collecting tank is provided above the sludge interception component, the water collecting tank is provided with an adjustable overflow weir, the water discharged from the water collecting tank is discharged through an outlet pipe, a flushing device is provided below the sludge interception component, and the sludge interception component is arranged on a bracket inside the acidification tank.

[0011] As a preferred solution of the present utility model, the inclined members are arranged in the middle area of the sludge interception component at an inclination angle of 60° with the horizontal plane, and the inclined members are composed of one of parallel plates, honeycomb inclined tube assemblies or square tubes.

[0012] As a preferred solution of the present utility model, a buffer layer with a height of 0.5 - 1.0 m is provided at the bottom of the inclined members, and the water depth above the inclined members is 0.5 - 1.0 m.

[0013] As a preferred solution of the present utility model, the inlet pipe uses a common pipe for water inlet.

[0014] As a preferred solution of the present utility model, the bracket and the acidification tank body are connected by welding with bolts or embedded steel plates, and the sludge interception component and the bracket are connected by bolts.

[0015] As a preferred solution of the present utility model, the water collecting tank is provided with an adjustable overflow weir, and a water outlet is provided at the lower end of the water collecting tank, and the water is discharged through an outlet pipe.

[0016] As a preferred solution of the present utility model, the flushing device uses compressed air or blower aeration.

[0017] In summary, the technical effects and advantages of the present utility model: For the acidification tank with the hydrolysis sludge interception component, after the completely mixed acidification tank is equipped with the sludge interception component, in addition to retaining the original mud-water mixing effect, a good mud-water separation effect is also achieved. The suspended solids in the effluent can be controlled within 300 mg / l, meeting the interception requirements. At the same time, the floor area and equipment configuration are effectively saved, and the energy consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic internal view of the sludge interception component of the present utility model;

[0019] Figure 2 It is the end face structure diagram of the sludge interception component of the present utility model;

[0020] Figure 3 It is the internal structure diagram of the hydrolysis acidification tank body of the present utility model;

[0021] Figure 4 It is the diagram of the reverse flow form of the sludge interception component of the present utility model;

[0022] Figure 5 It is the diagram of the same - direction flow form of the sludge interception component of the present utility model;

[0023] Figure 6 It is the diagram of the transverse flow form of the sludge interception component of the present utility model.

[0024] In the figure: 1. Hydrolysis acidification tank body; 101. Inlet pipeline; 102. Stirring device; 2. Sludge interception component; 201. Inclined member; 202. Buffer zone; 203. Water collection tank; 204. Adjustable overflow weir; 205. Outlet pipe; 206. Flushing device; 207. Support. Specific implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] Refer to Figures 1-6 , a hydrolysis acidification tank with a hydrolysis sludge interception component, including a hydrolysis acidification tank body 1 and a sludge interception component 2. The upper part inside the hydrolysis acidification tank body 1 is connected with the sludge interception component 2; an inlet pipeline 101 is arranged inside the hydrolysis acidification tank body 1, a stirring device 102 is arranged inside the hydrolysis acidification tank body 1, the upper part inside the hydrolysis acidification tank body 1 is connected with the sludge interception component 2. Multiple groups of inclined members 201 are arranged in the middle area of the sludge interception component 2, buffer zones 202 are arranged below and above the inclined members, a water collection tank 203 is arranged above the sludge interception component 2, an adjustable overflow weir 204 is arranged on the water collection tank 203, the water discharged from the water collection tank 203 is discharged through an outlet pipeline 205, a flushing device 206 is arranged at the lower part of the sludge interception component 2, and the sludge interception component 2 is arranged on a support 207 inside the hydrolysis acidification tank.

[0027] Refer to Figures 1-6, since the completely mixed hydrolysis acidification tank is equipped with a stirrer inside and the effluent is a mixture of mud and water, a sedimentation tank needs to be configured for mud-water separation and sludge reflux, which occupies a large area. The sludge interception component 2 is arranged in the middle area of the sludge interception component 2 at an inclination of 60° to the horizontal plane according to the "shallow sedimentation" theory. The inclined member 201 is composed of one of a parallel plate, a honeycomb inclined tube assembly or a square tube, forming an improved hydrolysis acidification tank body 1 that shortens the sedimentation time and improves the sedimentation efficiency. It is applied to the primary sedimentation tanks of urban sewage and industrial sewage, with stable effects. In actual applications, different types of inclined plates and inclined tubes and arrangement methods are configured according to different sludge characteristics, greatly improving the practicability. According to the relative movement direction of the water flow and the sludge, the inclined plate sedimentation tank is divided into three forms: countercurrent flow, co-current flow and cross-flow. The upflow countercurrent flow is mainly used in urban sewage. The sludge interception component 2 adopts the upflow countercurrent flow. The inclined plate sedimentation tank utilizes the laminar flow principle, improves the treatment capacity of the sedimentation tank, shortens the particle sedimentation distance, thus shortening the sedimentation time, reducing the floor area, increasing the sedimentation area of the sedimentation tank, and thus improving the treatment efficiency, solving the problem of the large floor area of the completely mixed hydrolysis acidification tank. Through optimized design, the inclined plate filler of the inclined plate sedimentation tank is transformed and fabricated into a sludge interception component, which is integrally installed in the hydrolysis acidification tank to achieve the purpose of reducing the sedimentation tank process and reducing the floor area.

[0028] Refer to Figures 1-6 , the rectifying wall 102 adopts ordinary pipeline water inlet. The bracket 202 and the hydrolysis acidification tank body 1 are connected by bolts or welded with embedded parts. The sludge interception component 2 and the bracket 207 are connected by bolts. The collecting trough 203 is provided with an adjustable overflow weir 204. The lower end of the collecting trough 203 is provided with a water outlet, and the water flows out through the water outlet pipe 205. The flushing device 206 uses compressed air or blower aeration. A buffer layer with a height of 0.5 - 1.0 m is provided at the bottom of the inclined member 201, and the water depth above the inclined member 201 is 0.5 - 1.0 m, so that the water flow passes through the inclined member 201 area evenly and stably, improving the sedimentation efficiency of suspended solids.

[0029] Working principle: The structural principle of the hydrolysis acidification tank of the hydrolysis sludge retention component is as follows: (1) A buffer layer 202 is set at the bottom of the sludge retention component 2. The height is generally 0.5~1.0m, and the upper water depth is generally 0.5~1.0m, so that the water flows evenly and smoothly through the inclined component 201 area, thereby improving the sedimentation efficiency of suspended matter. (2) The inclination angle of the inclined component 201 is generally 60°. (3) The water inlet pipe 101 uses an ordinary pipe for water inlet, and the water outlet of the water collection tank 204 is multi-slot water outlet, which fully utilizes the interception area and reduces the outlet flow rate. (4) A flushing device 206 of the inclined component 201 is provided. The style of the inclined member 201 is selected according to different sludge characteristics, taking into account both sedimentation and ease of cleaning. The inclination angle and the number of corners also need to be optimized according to the sludge load. The flushing device 206 is set below the sludge retention component 2. For a higher sludge retention component 2, it can be prefabricated inside the sludge retention component 2, and an installation interface can be reserved outside the sludge retention component 2. The material of the sludge retention component 2 takes into account lightness, durability, corrosion resistance, economy, and processing performance. PP sheet is used, and different thickness specifications are selected for processing and manufacturing according to the structural characteristics of different parts;

[0030] According to the characteristics of the determined hydrolysis acidification tank body 1, suitable specifications of the sludge interception component 2 are designed, and the appropriate number is selected according to the water flow of a single sludge interception component 2 and the water demand of the system. According to the installation requirements of the sludge interception component 2, a mounting bracket 207 is reserved in the hydrolysis acidification tank body 1, and the finished product is hoisted in place. The sewage separated from the mud and water by the sludge interception component 2 flows out from the outlet pipe 205 of the sludge interception component 2, and the sludge is retained and settled in the hydrolysis acidification tank body 1. The flushing device 206 is set to flush the sludge interception component 2 regularly. After the fully mixed hydrolysis acidification tank is equipped with the sludge retention component 2, in addition to retaining the original mud-water mixing effect, a better mud-water separation effect is achieved at the same time. The suspended solids in the effluent can be controlled within 300 mg / l, which meets the interception requirements, and effectively saves the floor space and equipment configuration, and reduces energy consumption.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrolysis acidification tank with a hydrolysis sludge retention assembly, comprising a hydrolysis acidification tank body (1) and a sludge retention assembly (2), characterized in that: The upper part of the hydrolysis and acidification tank body (1) is connected to a sludge retention component (2); A water inlet pipe (101) is provided in the hydrolysis acidification tank body, a stirring device (102) is provided in the hydrolysis acidification tank body (1), a sludge retention assembly (2) is connected to the upper part of the hydrolysis acidification tank body (1), a plurality of groups of inclined parts (201) are provided in the middle area of ​​the sludge retention assembly (2), buffer zones (202) are provided below and above the inclined parts, a water collecting trough (203) is provided above the sludge retention assembly (2), the water collecting trough (203) is provided with an adjustable overflow weir (204), water out of the water collecting trough (203) is discharged through a water outlet pipe (205), a flushing device (206) is provided at the lower part of the sludge retention assembly (2), and the sludge retention assembly (2) is arranged on a bracket (207) inside the hydrolysis acidification tank.

2. The hydrolysis acidification tank of the hydrolysis sludge interception assembly according to claim 1, characterized in that: The inclined member (201) is arranged in the middle area of ​​the sludge interception assembly (2) at an inclination angle of 60° with the horizontal plane, and the inclined member (201) is composed of one of a parallel plate, a honeycomb inclined tube assembly or a square tube.

3. The hydrolysis acidification tank of the hydrolysis sludge interception assembly according to claim 1, characterized in that: A buffer layer with a height of 0.5-1.0 m is provided at the bottom of the inclined member (201), and the water depth above the inclined member (201) is 0.5-1.0 m.

4. The hydrolysis acidification tank of the hydrolysis sludge interception assembly according to claim 1, characterized in that: The water inlet pipe (101) adopts a common pipe for water inlet.

5. The hydrolysis acidification tank of the hydrolysis sludge interception assembly according to claim 1, characterized in that: The support (207) and the hydrolysis acidification tank body (1) are connected by bolts or embedded parts welding, and the sludge interception assembly (2) and the support (207) are connected by bolts.

6. The hydrolysis acidification tank of the hydrolysis sludge interception assembly according to claim 1, characterized in that: The water collecting tank (203) is provided with an adjustable overflow weir (204), and a water outlet is provided at the lower end of the water collecting tank (203), and water is discharged through a water outlet pipe (205).

7. The hydrolysis acidification tank of the hydrolysis sludge interception assembly according to claim 1, characterized in that: The flushing device (206) uses compressed air or a blower for aeration.

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