Anaerobic tank for sewage treatment

Abstract

The utility model discloses an anaerobic tank for sewage treatment. The anaerobic tank comprises an up-flow anaerobic reactor, a pipe-point uniform water distributor, an assembled three-phase separator, a closed structure and a pressing structure, a pipe-point uniform water distributor is arranged in the up-flow anaerobic reactor, the assembled three-phase separator is arranged in the up-flow anaerobic reactor, the closed structures are arranged at the two ends of the up-flow anaerobic reactor, and the pressing structure is arranged at the top of the up-flow anaerobic reactor. Compared with the prior art, the utility model has the advantages that the top opening of the up-flow anaerobic reactor can be closed or opened as required, anaerobic reaction is facilitated, other subsequent operations are also facilitated, the structure is simple, the processing, manufacturing and mounting are simple and convenient, and the transportation is convenient; meanwhile, the characteristics of the up-flow anaerobic reactor are combined, so that uniform water distribution and efficient mud-water separation of the reactor are realized, and the defects of the conventional process equipment are overcome.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an anaerobic wastewater treatment tank. Background Technology

[0002] An anaerobic digester is a wastewater treatment device used to treat organic wastewater. Wastewater treatment equipment typically includes sedimentation tanks, equalization tanks, biological treatment tanks, secondary sedimentation tanks, and disinfection tanks. Biological treatment tanks generally include anaerobic and aerobic tanks. The anaerobic digester is primarily used for anaerobic digestion. For wastewater with high COD concentrations, anaerobic reactions are usually performed first to improve COD removal rates, converting high-molecular-weight, recalcitrant organic matter into low-molecular-weight, easily degradable organic matter, and increasing the BOD / COD ratio.

[0003] Anaerobic treatment technology utilizes anaerobic bacteria to degrade organic pollutants under anaerobic conditions. Compared with aerobic technology, it has the advantages of saving energy consumption, producing less sludge, having a lower demand for nutrients, and having a better ability to degrade certain recalcitrant organic matter.

[0004] Under anaerobic conditions, some recalcitrant organic matter, such as large organic molecules, can be hydrolyzed into smaller organic molecules by extracellular enzymes secreted by anaerobic bacteria. This is beneficial for the subsequent operation of the aerobic biological treatment tank; otherwise, it would impact the aerobic tank, leading to substandard COD in the effluent. Anaerobic bacteria are a type of bacteria that grow better under anaerobic conditions than in aerobic environments, and cannot grow on the surface of solid culture media with air (18% oxygen) and / or 10% carbon dioxide concentration.

[0005] Existing technologies still have shortcomings:

[0006] (1) The commonly used anaerobic reactors in the prior art are upflow sludge bed, completely mixed reactor and baffle plate reactor. Among them, upflow sludge bed has advantages such as large sludge volume and good sludge interception and treatment effect, and is widely used in the treatment of high-concentration wastewater. However, traditional upflow anaerobic reactors have problems such as uneven water distribution, frequent water distribution blockage, poor sludge-water separation effect and complex equipment structure with high installation and maintenance difficulty.

[0007] (2) Existing anaerobic ponds are generally open-air, and wastewater is left to stand in the anaerobic pond. The wastewater is left to stand so that it reacts with anaerobic bacteria. However, since the anaerobic pond is open-air, the anaerobic bacteria that are close to the air are easily killed or have reduced activity due to the high oxygen concentration at that location.

[0008] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0009] The technical problem to be solved by this utility model is to overcome the above-mentioned defects and provide an anaerobic wastewater treatment tank.

[0010] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: an anaerobic wastewater treatment tank, comprising:

[0011] An upflow anaerobic reactor is provided with a pipe-point uniform water distributor inside the upflow anaerobic reactor. The pipe-point uniform water distributor includes a water distribution channel located at the top of the upflow anaerobic reactor. Water distribution pipes are connected to both ends of the bottom of the water distribution channel, and water distribution heads are connected to the bottom of the water distribution pipes.

[0012] A modular three-phase separator is installed inside an upflow anaerobic reactor. The modular three-phase separator includes several separation chambers, and a gas chamber is provided between two adjacent separation chambers.

[0013] A closed structure is provided at both ends of an upflow anaerobic reactor. The closed structure includes horizontal plates fixedly connected to the top of both ends of the outer wall of the upflow anaerobic reactor. A rotating shaft is rotatably inserted between the two horizontal plates. A winding roller is fixedly connected to the outer wall of the rotating shaft. A sealing cloth is wound around one end of the winding roller. A winding rope is fixedly connected to both ends of one side of the sealing cloth. One end of the winding rope is wound around the other end of the winding roller.

[0014] A compression structure is provided at the top of the upflow anaerobic reactor. The compression structure includes support plates fixedly connected to the middle of the four corners of the outer surface of the upflow anaerobic reactor. An electric push rod is fixedly installed on the top of the support plate. The electric push rod is fixedly connected to a fixing plate. A compression frame is fixedly connected between the four fixing plates. The compression frame is used in conjunction with a sealing cloth.

[0015] Furthermore, triangular weir plates are provided at both ends of the water distribution channel, and the number of water distribution heads is the same as that of the water distribution pipe.

[0016] Furthermore, the separation chamber is equipped with multiple gas collecting plates, the top of the gas chamber is equipped with an arc-shaped cover plate, the arc-shaped cover plate is attached to both sides with vertical plates, and the arc-shaped cover plate is provided with biogas pipe connection holes and water distribution pipe connection holes, and the water distribution pipe is inserted into the water distribution pipe connection holes from top to bottom.

[0017] Furthermore, one end of the rotating shaft extends to the outside of the horizontal plate and is fixedly connected to a synchronous pulley, and a synchronous transmission belt is sleeved between the two synchronous pulleys.

[0018] Furthermore, a motor is fixedly connected to the outside of one end of the rotating shaft cross plate.

[0019] The advantages of this utility model compared with the prior art are as follows:

[0020] (1) In this utility model, by setting up a pipe-point uniform water distributor and a modular three-phase separator, the equipment adopts a modular structure, which has the characteristics of simple structure, easy processing, easy installation and transportation. At the same time, combined with the characteristics of upflow anaerobic reactor, it realizes uniform water distribution and efficient mud-water separation of the reactor, which improves the shortcomings of previous process equipment.

[0021] (2) In this utility model, by setting up a closed structure and a pressing structure, and by using a motor, a rotating shaft, a synchronous pulley, a synchronous transmission belt, a winding roller, a sealing cloth, and a winding rope in combination, the sealing cloth is released and unfolded, thereby covering the top opening of the upflow anaerobic reactor. This can reduce the amount of oxygen that the sewage comes into contact with. At the same time, four sets of electric push rods are activated to drive the pressing frame to descend, so that it presses down on the sealing cloth, thereby sealing the anaerobic tank and improving the activity of anaerobic bacteria. Thus, the top opening of the upflow anaerobic reactor can be closed or opened as needed, which is convenient for anaerobic reaction and subsequent operations, thus improving the practicality of the anaerobic tank. Attached Figure Description

[0022] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] Figure 1 This utility model relates to a three-dimensional anaerobic tank for wastewater treatment. Figure 1 .

[0024] Figure 2 This utility model relates to a three-dimensional anaerobic tank for wastewater treatment. Figure 2 .

[0025] Figure 3 This is a schematic diagram of the closed structure of an anaerobic wastewater treatment tank according to the present invention.

[0026] Figure 4 This is a cross-sectional view of an anaerobic wastewater treatment tank according to this utility model.

[0027] Figure 5 This is a schematic diagram of the pipe-point uniform water distributor for an anaerobic wastewater treatment tank according to this utility model.

[0028] Figure 6 This is a schematic diagram of the structure of a modular three-phase separator for an anaerobic wastewater treatment tank according to this utility model.

[0029] The diagram shows: 1. Upflow anaerobic reactor; 2. Pipe-point uniform water distributor; 201. Water distribution channel; 202. Water distribution pipe; 203. Water distribution head; 3. Assembled three-phase separator; 301. Separation chamber; 302. Gas chamber; 4. Enclosed structure; 401. Horizontal plate; 402. Rotating shaft; 403. Take-up roller; 404. Synchronous pulley; 405. Synchronous drive belt; 406. Sealing cloth; 407. Take-up rope; 408. Motor; 5. Pressing structure; 501. Support plate; 502. Electric push rod; 503. Fixing plate; 504. Pressing frame. Detailed Implementation

[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] like Figures 1 to 6 As shown, this embodiment proposes a wastewater treatment anaerobic tank, including an upflow anaerobic reactor 1, which is a type of anaerobic tank. The UASB reactor is a highly efficient anaerobic wastewater treatment technology, mainly used to treat wastewater containing organic pollutants. Its working principle is to decompose the organic matter in the wastewater into biogas through an anaerobic biodegradation process, simultaneously generating clean energy. The upflow anaerobic reactor 1 is existing technology and will not be described in detail here.

[0033] The upflow anaerobic reactor 1 is equipped with a pipe-point uniform water distributor 2. The pipe-point uniform water distributor 2 includes a water distribution channel 201 located at the top of the upflow anaerobic reactor 1. Triangular weir plates are provided at both ends of the water distribution channel 201. The water distribution channel 201 is made of welded steel plates. Water distribution pipes 202 are connected to both ends of the bottom of the water distribution channel 201. Water distribution heads 203 are connected to the bottom of the water distribution pipes 202. The water distribution heads 203 are located at the bottom of the upflow anaerobic reactor 1 and are arranged in an array according to the tank area and the amount of water to be treated. The water distribution heads 203 are arranged at equal intervals, and the number of water distribution heads 203 is the same as that of the water distribution pipes 202. The inlet pipe of the upflow anaerobic reactor 1 is directly introduced into the pipe-point uniform water distributor 2, and the water distribution pipes 202 are made of flexible hoses such as PE and PVC pipes, which transport the sewage in the water distribution channel 201 from top to bottom to the water distribution heads 203 at the bottom of the pool. The water distribution pipes 202 realize point-to-point water distribution between the water distribution channel 201 and the water distribution heads 203, ensuring uniform water distribution. All of the above are existing technologies and will not be described in detail here.

[0034] The upflow anaerobic reactor 1 is equipped with a modular three-phase separator 3, which is located in the upper middle part of the upflow anaerobic reactor 1. Its function is to separate the solid, liquid and gas mixture in the upflow anaerobic reactor 1. The modular three-phase separator 3 adopts a modular structure and can be made of fiberglass, stainless steel or PP material. These are all existing technologies and will not be described in detail here.

[0035] The modular three-phase separator 3 includes several separation chambers 301, and an air chamber 302 is provided between two adjacent separation chambers 301. The modular three-phase separator 3 adopts standardized modules, each module including two separation chambers 301 and one air chamber 302. The number of modules is determined according to the body area and the amount of water to be treated. The modules are connected to each other through the air chamber 302.

[0036] The separation chamber 301 is equipped with multiple gas collecting plates of different heights. The sludge flocs carrying air bubbles collide with the gas collecting plates, causing the attached air bubbles to degas. The gas enters the gas chamber 302 and is led out of the assembled three-phase separator 3 through a pipe. The sludge attached to the gas collecting plates slides down into the anaerobic zone of the upflow anaerobic reactor 1.

[0037] The top of the gas chamber 302 is provided with an arc-shaped cover plate, and vertical plates are attached to both sides of the arc-shaped cover plate. The arc-shaped cover plate has a biogas pipe connection hole and a water distribution pipe connection hole. The water distribution pipe 202 is inserted into the water distribution pipe connection hole from top to bottom, thereby realizing the integrated connection of the pipe-point uniform water distributor 2 and the assembled three-phase separator 3.

[0038] The upflow anaerobic reactor 1 has a closed structure 4 at both ends. The closed structure 4 includes a horizontal plate 401 fixedly connected to the top of both ends of the outer wall of the upflow anaerobic reactor 1. A rotating shaft 402 is rotatably inserted between the two horizontal plates 401. A motor 408 is fixedly connected to the outside of the horizontal plate 401 at one end of the rotating shaft 402. The motor 408 is provided with a motor frame, which is fixedly connected to the outer surface of the horizontal plate 401.

[0039] One end of the rotating shaft 402 extends to the outside of the horizontal plate 401 and is fixedly connected to a synchronous pulley 404. A synchronous transmission belt 405 is sleeved between the two synchronous pulleys 404. The synchronous pulleys 404 and the synchronous transmission belt 405 are existing technologies and will not be described in detail here.

[0040] A winding roller 403 is fixedly connected to the outer wall of the rotating shaft 402. A sealing cloth 406 is wound around one end of the winding roller 403. A winding rope 407 is fixedly connected to both ends of one side of the sealing cloth 406. One end of the winding rope 407 is wound around the other end of the winding roller 403. When the winding roller 403 rotates, the sealing cloth 406 is released, causing one end of the sealing cloth 406 to move towards the winding rope 407, thereby covering the top opening of the upflow anaerobic reactor 1. The covering sealing cloth 406 can reduce the amount of air exchange between the anaerobic tank and the outside air, prevent anaerobic bacteria from contacting too much oxygen, and allow anaerobic bacteria to carry out anaerobic reactions better. When anaerobic reactions are not required, the opening of the anaerobic tank is exposed to the air. After the sealing cloth 406 is wound up on one end of the winding roller 403, it does not affect other operations, such as cleaning of the anaerobic tank and maintenance or replacement of water pipes inside the anaerobic tank.

[0041] It should be noted that the sealing cloth 406 cannot provide an absolute seal for the top opening of the upflow anaerobic reactor 1, but only provides a certain degree of sealing effect, reducing the amount of air exchange between the upflow anaerobic reactor 1 and the external environment to some extent.

[0042] The top of the upflow anaerobic reactor 1 is equipped with a pressing structure 5. The pressing structure 5 includes a support plate 501 fixedly connected to the middle of the four corners of the outer surface of the upflow anaerobic reactor 1. An electric push rod 502 is fixedly installed on the top of the support plate 501. The electric push rod 502 is fixedly connected to a fixed plate 503. A pressing frame 504 is fixedly connected between the four fixed plates 503. The pressing frame 504 works in conjunction with the sealing cloth 406. By activating the four sets of electric push rods 502, the fixed plates 503 and the pressing frame 504 are driven to descend. The pressing frame 504 presses down on the sealing cloth 406, so that the sealing cloth 406 is tightly attached to the top of the upflow anaerobic reactor 1, thereby improving the sealing performance.

[0043] In practical implementation, when anaerobic reaction is required, the motor 408 is first started to drive one end of the shaft 402 to rotate. The shaft 402, through the cooperation of the synchronous pulley 404 and the synchronous transmission belt 405, drives the other end of the shaft 402 to rotate synchronously, thereby driving the two winding rollers 403 to rotate synchronously. When the winding rollers 403 rotate, they release the sealing cloth 406, causing one end of the sealing cloth 406 to move towards the winding rope 407, thus covering the top opening of the upflow anaerobic reactor 1. Covering the top with the sealing cloth 406 reduces the amount of oxygen the wastewater comes into contact with. After the sealing cloth 406 covers the top of the upflow anaerobic reactor 1, four sets of electric push rods 502 are simultaneously activated to drive the fixing plate 503 and the clamping frame 504. The pressure frame 504 presses down on the sealing cloth 406, making the sealing cloth 406 tightly adhere to the top of the upflow anaerobic reactor 1, improving the sealing performance. This allows for the sealing of the anaerobic tank, enhancing the activity of anaerobic bacteria in the wastewater treatment anaerobic tank. The top opening of the upflow anaerobic reactor 1 can be closed or opened as needed, facilitating both anaerobic reactions and subsequent operations. The equipment adopts a modular structure, with each major system within the main body employing the simplest manufacturing process. It features a simple structure, easy processing, manufacturing, installation, and transportation. Furthermore, combined with the characteristics of the upflow anaerobic reactor 1, it achieves uniform water distribution and efficient mud-water separation, overcoming the shortcomings of previous processes and improving the practicality of the anaerobic tank.

[0044] All electrical components mentioned in this document are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer. The specific embodiments disclosed herein omit detailed descriptions of known functions and components. To ensure device compatibility, the operating methods used are consistent with the parameters of commercially available devices. In addition, all contents not described in detail in this specification are prior art known to those skilled in the art. The accompanying drawings are structural schematic diagrams used to supplement the text of the specification.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anaerobic wastewater treatment tank, characterized in that, include: An upflow anaerobic reactor (1) is provided inside the upflow anaerobic reactor (1) with a pipe-point uniform water distributor (2). The pipe-point uniform water distributor (2) includes a water distribution channel (201) located at the top of the upflow anaerobic reactor (1). Water distribution pipes (202) are connected to both ends of the bottom of the water distribution channel (201). Water distribution heads (203) are connected to the bottom of the water distribution pipes (202). The assembled three-phase separator (3) is located inside the upflow anaerobic reactor (1). The assembled three-phase separator (3) includes several separation chambers (301), and a gas chamber (302) is provided between two adjacent separation chambers (301). A closed structure (4) is provided at both ends of the upflow anaerobic reactor (1). The closed structure (4) includes a horizontal plate (401) fixedly connected to the top of both ends of the outer wall of the upflow anaerobic reactor (1). A rotating shaft (402) is rotatably inserted between the two horizontal plates (401). A winding roller (403) is fixedly connected to the outer wall of the rotating shaft (402). A sealing cloth (406) is wound on one end of the winding roller (403). A winding rope (407) is fixedly connected to both ends of one side of the sealing cloth (406). One end of the winding rope (407) is wound on the other end of the winding roller (403). A compression structure (5) is provided on the top of the upflow anaerobic reactor (1). The compression structure (5) includes a support plate (501) fixedly connected to the middle of the four corners of the outer surface of the upflow anaerobic reactor (1). An electric push rod (502) is fixedly installed on the top of the support plate (501). A fixing plate (503) is fixedly connected to the electric push rod (502). A compression frame (504) is fixedly connected between the four fixing plates (503). The compression frame (504) is used in conjunction with the sealing cloth (406).

2. The anaerobic wastewater treatment tank according to claim 1, characterized in that: The water distribution channel (201) is equipped with triangular weir plates at both ends, and the number of water distribution heads (203) is the same as that of the water distribution pipe (202).

3. The anaerobic wastewater treatment tank according to claim 1, characterized in that: The separation chamber (301) is provided with multiple gas collecting plates. The top of the gas chamber (302) is provided with an arc-shaped cover plate. The arc-shaped cover plate is connected to the two sides with upright plates. The arc-shaped cover plate is provided with biogas pipe connection holes and water distribution pipe connection holes. The water distribution pipe (202) is inserted into the water distribution pipe connection holes from top to bottom.

4. The anaerobic wastewater treatment tank according to claim 1, characterized in that: One end of the rotating shaft (402) extends to the outside of the horizontal plate (401) and is fixedly connected to a synchronous pulley (404) at the end. A synchronous transmission belt (405) is sleeved between the two synchronous pulleys (404).

5. The anaerobic wastewater treatment tank according to claim 1, characterized in that: A motor (408) is fixedly connected to the outside of the cross plate (401) of the shaft (402) at one end.

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